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361 results on '"H. Smit"'

1. Linear and Nonlinear Biphasic Mechanical Properties of Goat IVDs Under Different Swelling Conditions in Confined Compression

Author

Farid Vakili-Tahami, Theo H. Smit, Akbar Rasoulian, Medical Biology, AMS - Tissue Function & Regeneration, and Amsterdam Reproduction & Development (AR&D)

Subjects
Materials science, Annulus (oil well), Biomedical Engineering, Aggregate modulus, Nucleus pulposus, musculoskeletal system, Intervertebral disc, Permeability, Nonlinear system, Hydraulic conductivity, Permeability (electromagnetism), Phase (matter), medicine, Stress relaxation, Load-bearing capacity, Confined compression, Swelling, medicine.symptom, Composite material, Annulus fibrosus, Biphasic model
Abstract

To define technical specifications for artificial substitutes, it is necessary to model their mechanical behaviour. Here we studied the linear and nonlinear biphasic models for Nucleus Pulposus (NP) and Annulus Fibrosus (AF). The associated material parameters were obtained using confined compression stress relaxation tests on goat intervertebral disc (IVD) samples. The first parameter, aggregate modulus HA0, which essentially describes load-bearing capacity of the solid phase, was larger for AF (HA0 = 0.53 ± 0.06 MPa) than for NP (HA0 = 0.26 ± 0.04 MPa). For hydraulic permeability, which quantifies the ability to transmit interstitial fluid, it was the opposite (k0 = (0.20 ± 0.07) × 10-15 m4/Ns for AF and k0 = (0.67 ± 0.08)×10-15 m4/Ns for NP). The values of nonlinearity coefficients, nonlinear stiffening coefficient β and non-dimensional nonlinear permeability coefficient M, reflected that these tissues had nonlinear elastic behaviour and permeability. Also, investigating the effect of swelling conditions in sample preparation showed that for both AF and NP, confined-swollen samples had higher aggregate modulus and lower permeability values compared to the free-swollen ones. The quantitative description of the nonlinear properties of AF and NP provided a better understanding of IVD behaviour as well as technical specifications for their artificial substitutes.

Published
2021

2. Safety planning-type interventions for suicide prevention

Author

Heleen Riper, Gwendolyn Portzky, Annette Erlangsen, Wouter van Ballegooijen, Derek de Beurs, Johannes H. Smit, Chani Nuij, Rory C. O'Connor, Dilfa Juniar, and Ad J. F. M. Kerkhof

Subjects
Suicide Prevention, medicine.medical_specialty, Psychological intervention, MEDLINE, PsycINFO, Suicide prevention, Suicidal Ideation, 03 medical and health sciences, 0302 clinical medicine, SDG 3 - Good Health and Well-being, medicine, Humans, 030212 general & internal medicine, Psychiatry, Suicidal ideation, business.industry, SDG 10 - Reduced Inequalities, 030227 psychiatry, Psychiatry and Mental health, Relative risk, Meta-analysis, Number needed to treat, medicine.symptom, business
Abstract

BackgroundSafety planning-type interventions (SPTIs) for patients at risk of suicide are often used in clinical practice, but it is unclear whether these interventions are effective.AimsThis article reports on a meta-analysis of studies that have evaluated the effectiveness of SPTIs in reducing suicidal behaviour and ideation.MethodWe searched Medline, EMBASE, PsycINFO, Web of Science and Scopus from their inception to 9 December 2019, for studies that compared an SPTI with a control condition and had suicidal behaviour or ideation as outcomes. Two researchers independently extracted the data. To assess suicidal behaviour, we used a random-effects model of relative risk based on a pooled measure of suicidal behaviour. For suicidal ideation, we calculated effect sizes with Hedges’ g. The study was registered at PROSPERO (registration number CRD42020129185).ResultsOf 1816 unique abstracts screened, 6 studies with 3536 participants were eligible for analysis. The relative risk of suicidal behaviour among patients who received an SPTI compared with control was 0.570 (95% CI 0.408–0.795, P = 0.001; number needed to treat, 16). No significant effect was found for suicidal ideation.ConclusionsTo our knowledge, this is the first study to report a meta-analysis on SPTIs for suicide prevention. Results support the use of SPTIs to help preventing suicidal behaviour and the inclusion of SPTIs in clinical guidelines for suicide prevention. We found no evidence for an effect of SPTIs on suicidal ideation, and other interventions may be needed for this purpose.

Published
2021

3. The Complexity of Joint Regeneration: How an Advanced Implant could Fail by Its In Vivo Proven Bone Component

Author

Jos Malda, Anneloes Mensinga, Miguel Castilho, Ilyas M. Khan, Florencia Abinzano, Mylène de Ruijter, Harold Brommer, Riccardo Levato, Paweena Diloksumpan, Ineke H. Smit, Saskia G M Plomp, and P. René van Weeren

Subjects
030203 arthritis & rheumatology, 0303 health sciences, business.industry, Regeneration (biology), Cartilage, Type II collagen, Articular cartilage damage, Extracellular matrix, 03 medical and health sciences, 0302 clinical medicine, medicine.anatomical_structure, medicine, Implant, Progenitor cell, business, 030304 developmental biology, Biomedical engineering, Fixation (histology)
Abstract

Articular cartilage damage is a major challenge in healthcare due to the lack of long-term repair options. There are several promising regenerative implant-based approaches for the treatment, but the fixation of the implant remains a significant challenge. This study evaluated the potential for repair of an osteochondral implant produced through a novel combined bioprinting-based chondral-bone integration, with and without cells, in an equine model. Implants consisted of a melt electrowritten polycaprolactone (PCL) framework for the chondral compartment, which was firmly integrated with a bone anchor. The bone anchor was produced by extrusion-based printing of a low-temperature setting bioceramic material that had been proven to be effective for osteo-regeneration in an orthotopic, non-load bearing and non-articular site in the same species in an earlier in vivo study. Articular cartilage-derived progenitor cells were seeded into the PCL framework and cultured for 28 days in vitro in the presence of bone morphogenetic protein-9 (BMP-9), resulting in the formation of abundant extracellular matrix rich in glycosaminoglycans (GAGs) and type II collagen. The constructs were implanted in the stifle joints of Shetland ponies with cell-free scaffolds as controls. Clinical signs were monitored, and progression of healing was observed non-invasively through radiographic examinations and quantitative gait analysis. Biochemical and histological analyses 6 months after implantation revealed minimal deposition of GAGs and type II collagen in the chondral compartment of the defect site for both types of implants. Quantitative micro-computed tomography showed collapse of the bone anchor with low volume of mineralized neo-bone formation in both groups. Histology confirmed that the PCL framework within the chondral compartment was still present. It was concluded that the collapse of the osteal anchor, resulting in loss of the mechanical support of the chondral compartment, strongly affected overall outcome, precluding evaluation of the influence of BMP-9 stimulated cells on in vivo cartilage regeneration.Keywords: cartilage, 3D (bio)printing, equine model, osteochondral, articular cartilage-derived progenitor cells

Published
2021

4. Identifying the Common Genetic Basis of Antidepressant Response

Author

Sara A. Paciga, Richard M. Weinshilboum, Andrew M. McIntosh, Tim B. Bigdeli, Stephanie H. Witt, Sven Cichon, Glyn Lewis, Henning Teismann, Brenda W.J.H. Penninx, Gerome Breen, Roseann E. Peterson, Saira Saeed Mirza, Diego Albani, Lisa Jones, Andreas J. Forstner, Sara Mostafavi, Julien Bryois, Qingqin S. Li, Kenneth S. Kendler, Thomas Damm Als, Fernando S. Goes, Marie Bækvad-Hansen, Nancy L. Pedersen, Gianluigi Forloni, Per Qvist, Carsten Horn, Per Hoffmann, Steven P. Hamilton, Georg Homuth, Michael Gill, Julien Mendlewicz, Katharina Domschke, Volker Arolt, Adrian I. Campos, Christine Søholm Hansen, Scott D. Gordon, Hogni Oskarsson, Peter McGuffin, Oliver Pain, Eric Jorgenson, Victoria S. Marshe, Stacy Steinberg, Bertram Müller-Myhsok, Mark Adams, J. Raymond DePaulo, Rick Jansen, Katherine J. Aitchison, Vassily Trubetskoy, Henry Völzke, Manuel Mattheisen, Bernard Ng, James A. Knowles, Dorret I. Boomsma, Tracy Air, Elisabeth B. Binder, Ian B. Hickie, Christel M. Middeldorp, Tõnu Esko, David M. Hougaard, E.J.C. de Geus, Toni-Kim Clarke, Helena Gaspar, Bernhard T. Baune, Abdel Abdellaoui, Engilbert Sigurdsson, Andres Metspalu, Klaus Berger, Jorge A. Quiroz, Patrick F. Sullivan, Aartjan T.F. Beekman, Thomas Hansen, Panagiotis Ferentinos, Jürgen Wellmann, Miguel E. Rentería, Daniel Umbricht, Marcella Rietschel, Stanley I. Shyn, Chiara Fabbri, Hreinn Stefansson, Jerome C. Foo, Daniel Souery, Zoltán Kutalik, Yu-Li Liu, Paul F. O'Reilly, Michael John Owen, Nese Direk, Douglas F. Levinson, Stuart Montgomery, Hamdi Mbarek, David M. Howard, Guido Bondolfi, Lucía Colodro-Conde, Pippa A. Thomson, Merete Nordentoft, Stefan Kloiber, Yunpeng Wang, Michael Conlon O'Donovan, Grant C.B. Sinnamon, Alexander Viktorin, Hilary K. Finucane, Esben Agerbo, Stefan Herms, Markus M. Nöthen, Till F. M. Andlauer, Divya Mehta, Bradley T. Webb, Joanna M. Biernacka, David J. Porteous, Jordan W. Smoller, Jonathan R. I. Coleman, Dean F. MacKinnon, Farnush Farhadi Hassan Kiadeh, Baptiste Couvy-Duchesne, Evelin Mihailov, Eleanor M. Wigmore, Franziska Degenhardt, Jianxin Shi, Dale R. Nyholt, Enda M. Byrne, Stephan Ripke, Ole Mors, Patrik K. E. Magnusson, Eric J. Lenze, Warren W. Kretzschmar, Masaki Kato, Marcus Ising, Ian Jones, Lynsey S. Hall, Wouter J. Peyrot, Ling Shen, Nader Perroud, Na Cai, Maciej Trzaskowski, Matthias Nauck, Isaac S. Kohane, Enrico Domenici, Fabian Streit, James L. Kennedy, Peter M. Visscher, Valentina Escott-Price, Donald J. MacIntyre, Enrique Castelao, Margarita Rivera, Mojca Z. Dernovsek, John P. Rice, Joseph Zohar, Gail Davies, Andrew C. Heath, Josef Frank, Wesley K. Thompson, Caroline Hayward, Penelope A. Lind, Thorgeir E. Thorgeirsson, Rudolf Uher, Jana Strohmaier, Henriette N. Buttenschøn, Erin C. Dunn, Jonas Bybjerg-Grauholm, Alexander Teumer, Jakob Grove, Eske M. Derks, Nicholas G. Martin, Jodie N. Painter, Myrna M. Weissman, Preben Bo Mortensen, Michel G. Nivard, Catherine Schaefer, Yihan Li, Daniel J. Smith, Shih-Jen Tsai, Niamh Mullins, Jian Yang, Marianne Giørtz Pedersen, Dan Rujescu, Thomas G. Schulze, Lili Milani, Yuri Milaneschi, Giorgio Pistis, James B. Potash, Neven Henigsberg, Nicholas John Craddock, Karen Hodgson, Silviu-Alin Bacanu, Shantel Weinsheimer, Charles F. Reynolds, Johannes H. Smit, Gonneke Willemsen, Futao Zhang, Henning Tiemeier, Grant W. Montgomery, Martin Preisig, Udo Dannlowski, Thalia C. Eley, Thomas Werge, Katherine E. Tansey, Jane H. Christensen, Julia Kraft, Ian J. Deary, Cathryn M. Lewis, Sarah E. Medland, André G. Uitterlinden, Daniel J. Müller, Carsten Bøcker Pedersen, Gustavo Turecki, Hans J. Grabe, Matthew Traylor, Brien P. Riley, Roy H. Perlis, Patrick J. McGrath, Conor V. Dolan, Hualin S. Xi, Jonathan Marchini, Robert A. Schoevers, Albert M. van Hemert, Anders D. Børglum, Susanne Lucae, Jouke-Jan Hottenga, Kari Stefansson, Benoit H. Mulsant, Francis M. Mondimore, Naomi R. Wray, Yang Wu, Wolfgang Maier, Danielle Posthuma, Annamaria Cattaneo, Gregory E. Crawford, Siegfried Kasper, Alessandro Serretti, Tania Carrillo-Roa, Robert Maier, Pamela A. F. Madden, Eva C. Schulte, Jens Treutlein, Joanna Hauser, Sandra Van der Auwera, Psychiatry, APH - Mental Health, Amsterdam Neuroscience - Mood, Anxiety, Psychosis, Stress & Sleep, Amsterdam Neuroscience - Complex Trait Genetics, APH - Methodology, Human genetics, Amsterdam Neuroscience - Compulsivity, Impulsivity & Attention, Amsterdam Reproduction & Development (AR&D), Adult Psychiatry, Clinical Cognitive Neuropsychiatry Research Program (CCNP), Interdisciplinary Centre Psychopathology and Emotion regulation (ICPE), Epidemiology, Child and Adolescent Psychiatry / Psychology, and Internal Medicine

Subjects
Oncology, MDD, medicine.medical_specialty, Single-nucleotide polymorphism, Genome-wide association study, Biology, Antidepressant response, Depression, GWAS, Genetics, Polygenic score, SDG 3 - Good Health and Well-being, Internal medicine, Genetic variation, medicine, ddc:610, Genetic association, General Medicine, Heritability, medicine.disease, Schizophrenia, Sample size determination, Settore BIO/14 - Farmacologia, Major depressive disorder
Abstract

Background: Antidepressants are a first-line treatment for depression. However, only a third of individuals experience remission after the first treatment. Common genetic variation, in part, likely regulates antidepressant response, yet the success of previous genome-wide association studies has been limited by sample size. This study performs the largest genetic analysis of prospectively assessed antidepressant response in major depressive disorder to gain insight into the underlying biology and enable out-of-sample prediction.Methods: Genome-wide analysis of remission (nremit = 1852, nnonremit = 3299) and percentage improvement (n = 5218) was performed. Single nucleotide polymorphism–based heritability was estimated using genome-wide complex trait analysis. Genetic covariance with eight mental health phenotypes was estimated using polygenic scores/AVENGEME. Out-of-sample prediction of antidepressant response polygenic scores was assessed. Gene-level association analysis was performed using MAGMA and transcriptome-wide association study. Tissue, pathway, and drug binding enrichment were estimated using MAGMA.Results: Neither genome-wide association study identified genome-wide significant associations. Single nucleotide polymorphism–based heritability was significantly different from zero for remission (h2 = 0.132, SE = 0.056) but not for percentage improvement (h2 = −0.018, SE = 0.032). Better antidepressant response was negatively associated with genetic risk for schizophrenia and positively associated with genetic propensity for educational attainment. Leave-one-out validation of antidepressant response polygenic scores demonstrated significant evidence of out-of-sample prediction, though results varied in external cohorts. Gene-based analyses identified ETV4 and DHX8 as significantly associated with antidepressant response.Conclusions: This study demonstrates that antidepressant response is influenced by common genetic variation, has a genetic overlap schizophrenia and educational attainment, and provides a useful resource for future research. Larger sample sizes are required to attain the potential of genetics for understanding and predicting antidepressant response.

Published
2022

5. Alteration of structural and mechanical properties of the temporomandibular joint disc following elastase digestion

Author

Fereshteh Mirahmadi, Vincent Everts, Theo H. Smit, Jan Harm Koolstra, S Fazaeli, Samaneh Ghazanfari, Medical Biology, AMS - Restoration & Development, Amsterdam Movement Sciences, Amsterdam Reproduction & Development (AR&D), AMS - Tissue Function & Regeneration, Oral Cell Biology, RS: FSE AMIBM, AMIBM, RS: FSE Sciences, Sciences, Biobased Materials, and RS: FSE Biobased Materials

Subjects
Swine, 02 engineering and technology, mechanical properties, Tortuosity, COLLAGEN-FIBERS, Glycosaminoglycan, Weight-Bearing, Immunolabeling, ARTICULAR DISC, Original Research Reports, enzymatic degradation, cartilage, Glycosaminoglycans, biology, Pancreatic Elastase, Elastase, 021001 nanoscience & nanotechnology, QUANTITATIVE-ANALYSIS, medicine.anatomical_structure, INTERNAL DERANGEMENT, Collagen, 0210 nano-technology, STEM-CELLS, BEHAVIOR, elastin fiber, musculoskeletal diseases, Materials science, DISORDERS, 0206 medical engineering, Biomedical Engineering, macromolecular substances, Original Research Report, Biomaterials, Tensile Strength, temporomandibular joint disc, medicine, Animals, Fragmentation (cell biology), Cell Shape, Mechanical Phenomena, Cartilage, Temporomandibular Joint Disc, DEGRADATION, 020601 biomedical engineering, Elastin, RHEUMATOID-ARTHRITIS, biology.protein, Biophysics, MORPHOLOGY, Stress, Mechanical
Abstract

The temporomandibular joint disc is a fibrocartilaginous structure, composed of collagen fibers, elastin fibers, and proteoglycans. Despite the crucial role of elastin fibers in load‐bearing properties of connective tissues, its contribution in temporomandibular joint disc biomechanics has been disregarded. This study attempts to characterize the structural–functional contribution of elastin in the temporomandibular joint disc. Using elastase, we selectively perturbed the elastin fiber network in porcine temporomandibular joint discs and investigated the structural, compositional, and mechanical regional changes through: (a) analysis of collagen and elastin fibers by immunolabeling and transmission electron microscopy; (b) quantitative analysis of collagen tortuosity, cell shape, and disc volume; (c) biochemical quantification of collagen, glycosaminoglycan and elastin content; and (d) cyclic compression test. Following elastase treatment, microscopic examination revealed fragmentation of elastin fibers across the temporomandibular joint disc, with a more pronounced effect in the intermediate regions. Also, biochemical analyses of the intermediate regions showed significant depletion of elastin (50%), and substantial decrease in collagen (20%) and glycosaminoglycan (49%) content, likely due to non‐specific activity of elastase. Degradation of elastin fibers affected the homeostatic configuration of the disc, reflected in its significant volume enlargement accompanied by remarkable reduction of collagen tortuosity and cell elongation. Mechanically, elastase treatment nearly doubled the maximal energy dissipation across the intermediate regions while the instantaneous modulus was not significantly affected. We conclude that elastin fibers contribute to the restoration and maintenance of the disc resting shape and actively interact with collagen fibers to provide mechanical resilience to the temporomandibular joint disc.

Published
2020

6. Continuous versus discrete data analysis for gait evaluation of horses with induced bilateral hindlimb lameness

Author

Harold Brommer, Paul René van Weeren, Ineke H. Smit, Filipe M. Serra Bragança, Marie Rhodin, and E. Hernlund

Subjects
Data Analysis, medicine.medical_specialty, 040301 veterinary sciences, Computer science, Lameness, Animal, STRIDE, Kinematics, Statistical parametric mapping, Generalized linear mixed model, 0403 veterinary science, Gait (human), Physical medicine and rehabilitation, Forelimb, Medical Bioscience, medicine, Animals, Horses, Treadmill, Gait, 0402 animal and dairy science, 04 agricultural and veterinary sciences, General Medicine, 040201 dairy & animal science, Biomechanical Phenomena, Hindlimb, Lameness, Gait analysis, Horse Diseases
Abstract

BACKGROUND Gait kinematics measured during equine gait analysis are typically evaluated by analysing (asymmetry-based) discrete variables (eg, peak values) obtained from continuous kinematic signals (eg, timeseries of datapoints). However, when used for the assessment of complex cases of lameness, such as bilateral lameness, discrete variable analysis might overlook relevant functional adaptations. OBJECTIVES The overall aim of this paper is to compare continuous and discrete data analysis techniques to evaluate kinematic gait adaptations to lameness. STUDY DESIGN Method comparison. METHODS Sixteen healthy Shetland ponies, enrolled in a research programme in which osteochondral defects were created on the medial trochlear ridges of both femurs, were used in this study. Kinematic data were collected at trot on a treadmill before and at 3 and 6 months after surgical intervention. Statistical parametric mapping and linear mixed models were used to compare kinematic variables between and within timepoints. RESULTS Both continuous and discrete data analyses identified changes in pelvis and forelimb kinematics. Discrete data analyses showed significant changes in hindlimb and back kinematics, where such differences were not found to be significant by continuous data analysis. In contrast, continuous data analysis provided additional information on the timing and duration of the differences found. MAIN LIMITATIONS A limited number of ponies were included. CONCLUSIONS The use of continuous data provides additional information regarding gait adaptations to bilateral lameness that is complementary to the analysis of discrete variables. The main advantage lies in the additional information regarding time dependence and duration of adaptations, which offers the opportunity to identify functional adaptations during all phases of the stride cycle, not just the events related to peak values.

Published
2022

7. Sex-Dependent Shared and Nonshared Genetic Architecture Across Mood and Psychotic Disorders

Author

Gabriëlla A.M. Blokland, Jakob Grove, Chia-Yen Chen, Chris Cotsapas, Stuart Tobet, Robert Handa, David St Clair, Todd Lencz, Bryan J. Mowry, Sathish Periyasamy, Murray J. Cairns, Paul A. Tooney, Jing Qin Wu, Brian Kelly, George Kirov, Patrick F. Sullivan, Aiden Corvin, Brien P. Riley, Tõnu Esko, Lili Milani, Erik G. Jönsson, Aarno Palotie, Hannelore Ehrenreich, Martin Begemann, Agnes Steixner-Kumar, Pak C. Sham, Nakao Iwata, Daniel R. Weinberger, Pablo V. Gejman, Alan R. Sanders, Joseph D. Buxbaum, Dan Rujescu, Ina Giegling, Bettina Konte, Annette M. Hartmann, Elvira Bramon, Robin M. Murray, Michele T. Pato, Jimmy Lee, Ingrid Melle, Espen Molden, Roel A. Ophoff, Andrew McQuillin, Nicholas J. Bass, Rolf Adolfsson, Anil K. Malhotra, Nicholas G. Martin, Janice M. Fullerton, Philip B. Mitchell, Peter R. Schofield, Andreas J. Forstner, Franziska Degenhardt, Sabrina Schaupp, Ashley L. Comes, Manolis Kogevinas, José Guzman-Parra, Andreas Reif, Fabian Streit, Lea Sirignano, Sven Cichon, Maria Grigoroiu-Serbanescu, Joanna Hauser, Jolanta Lissowska, Fermin Mayoral, Bertram Müller-Myhsok, Beata Świątkowska, Thomas G. Schulze, Markus M. Nöthen, Marcella Rietschel, John Kelsoe, Marion Leboyer, Stéphane Jamain, Bruno Etain, Frank Bellivier, John B. Vincent, Martin Alda, Claire O’Donovan, Pablo Cervantes, Joanna M. Biernacka, Mark Frye, Susan L. McElroy, Laura J. Scott, Eli A. Stahl, Mikael Landén, Marian L. Hamshere, Olav B. Smeland, Srdjan Djurovic, Arne E. Vaaler, Ole A. Andreassen, Bernhard T. Baune, Tracy Air, Martin Preisig, Rudolf Uher, Douglas F. Levinson, Myrna M. Weissman, James B. Potash, Jianxin Shi, James A. Knowles, Roy H. Perlis, Susanne Lucae, Dorret I. Boomsma, Brenda W.J.H. Penninx, Jouke-Jan Hottenga, Eco J.C. de Geus, Gonneke Willemsen, Yuri Milaneschi, Henning Tiemeier, Hans J. Grabe, Alexander Teumer, Sandra Van der Auwera, Uwe Völker, Steven P. Hamilton, Patrik K.E. Magnusson, Alexander Viktorin, Divya Mehta, Niamh Mullins, Mark J. Adams, Gerome Breen, Andrew M. McIntosh, Cathryn M. Lewis, David M. Hougaard, Merete Nordentoft, Ole Mors, Preben B. Mortensen, Thomas Werge, Thomas D. Als, Anders D. Børglum, Tracey L. Petryshen, Jordan W. Smoller, Jill M. Goldstein, Stephan Ripke, Benjamin M. Neale, James T.R. Walters, Kai-How Farh, Peter A. Holmans, Phil Lee, Brendan Bulik-Sullivan, David A. Collier, Hailiang Huang, Tune H. Pers, Ingrid Agartz, Esben Agerbo, Margot Albus, Madeline Alexander, Farooq Amin, Silviu A. Bacanu, Richard A. Belliveau, Judit Bene, Sarah E. Bergen, Elizabeth Bevilacqua, Tim B. Bigdeli, Donald W. Black, Richard Bruggeman, Nancy G. Buccola, Randy L. Buckner, William Byerley, Wiepke Cahn, Guiqing Cai, Dominique Campion, Rita M. Cantor, Vaughan J. Carr, Noa Carrera, Stanley V. Catts, Kimberly D. Chambert, Raymond C.K. Chan, Ronald Y.L. Chen, Eric Y.H. Chen, Wei Cheng, Eric F.C. Cheung, Siow Ann Chong, C. Robert Cloninger, David Cohen, Nadine Cohen, Paul Cormican, Nick Craddock, James J. Crowley, David Curtis, Michael Davidson, Kenneth L. Davis, Jurgen Del Favero, Ditte Demontis, Dimitris Dikeos, Timothy Dinan, Gary Donohoe, Elodie Drapeau, Jubao Duan, Frank Dudbridge, Naser Durmishi, Peter Eichhammer, Johan Eriksson, Valentina Escott-Price, Laurent Essioux, Ayman H. Fanous, Martilias S. Farrell, Josef Frank, Lude Franke, Robert Freedman, Nelson B. Freimer, Marion Friedl, Joseph I. Friedman, Menachem Fromer, Giulio Genovese, Lyudmila Georgieva, Paola Giusti-Rodríguez, Stephanie Godard, Jacqueline I. Goldstein, Vera Golimbet, Srihari Gopal, Jacob Gratten, Lieuwe de Haan, Christian Hammer, Mark Hansen, Thomas Hansen, Vahram Haroutunian, Frans A. Henskens, Stefan Herms, Joel N. Hirschhorn, Per Hoffmann, Andrea Hofman, Mads V. Hollegaard, Masashi Ikeda, Inge Joa, Antonio Julià, René S. Kahn, Luba Kalaydjieva, Sena Karachanak-Yankova, Juha Karjalainen, David Kavanagh, Matthew C. Keller, James L. Kennedy, Andrey Khrunin, Yunjung Kim, Janis Klovins, Vaidutis Kucinskas, Zita Ausrele Kucinskiene, Hana Kuzelova-Ptackova, Anna K. Kähler, Claudine Laurent, Jimmy Lee Chee Keong, S. Hong Lee, Sophie E. Legge, Bernard Lerer, Miaoxin Li, Tao Li, Kung-Yee Liang, Jeffrey Lieberman, Svetlana Limborska, Carmel M. Loughland, Jan Lubinski, Jouko Lönnqvist, Milan Macek, Brion S. Maher, Wolfgang Maier, Jacques Mallet, Sara Marsal, Manuel Mattheisen, Morten Mattingsdal, Robert W. McCarley, Colm McDonald, Sandra Meier, Carin J. Meijer, Bela Melegh, Raquelle I. Mesholam-Gately, Andres Metspalu, Patricia T. Michie, Vihra Milanova, Younes Mokrab, Derek W. Morris, Kieran C. Murphy, Inez Myin-Germeys, Mari Nelis, Igor Nenadic, Deborah A. Nertney, Gerald Nestadt, Kristin K. Nicodemus, Liene Nikitina-Zake, Laura Nisenbaum, Annelie Nordin, Eadbhard O’Callaghan, Colm O’Dushlaine, F. Anthony O’Neill, Sang-Yun Oh, Ann Olincy, Line Olsen, Jim Van Os, Christos Pantelis, George N. Papadimitriou, Sergi Papiol, Elena Parkhomenko, Tiina Paunio, Milica Pejovic-Milovancevic, Diana O. Perkins, Olli Pietiläinen, Jonathan Pimm, Andrew J. Pocklington, John Powell, Alkes Price, Ann E. Pulver, Shaun M. Purcell, Digby Quested, Henrik B. Rasmussen, Abraham Reichenberg, Mark A. Reimers, Alexander L. Richards, Joshua L. Roffman, Panos Roussos, Douglas M. Ruderfer, Veikko Salomaa, Ulrich Schall, Christian R. Schubert, Sibylle G. Schwab, Edward M. Scolnick, Rodney J. Scott, Larry J. Seidman, Engilbert Sigurdsson, Teimuraz Silagadze, Jeremy M. Silverman, Kang Sim, Petr Slominsky, Hon-Cheong So, Chris C.A. Spencer, Hreinn Stefansson, Stacy Steinberg, Elisabeth Stogmann, Richard E. Straub, Eric Strengman, Jana Strohmaier, T. Scott Stroup, Mythily Subramaniam, Jaana Suvisaari, Dragan M. Svrakic, Jin P. Szatkiewicz, Erik Söderman, Srinivas Thirumalai, Draga Toncheva, Sarah Tosato, Juha Veijola, John Waddington, Dermot Walsh, Dai Wang, Qiang Wang, Bradley T. Webb, Mark Weiser, Dieter B. Wildenauer, Nigel M. Williams, Stephanie Williams, Stephanie H. Witt, Aaron R. Wolen, Emily H.M. Wong, Brandon K. Wormley, Hualin Simon Xi, Clement C. Zai, Xuebin Zheng, Fritz Zimprich, Naomi R. Wray, Kari Stefansson, Peter M. Visscher, Douglas H.R. Blackwood, Ariel Darvasi, Enrico Domenici, Michael Gill, Hugh Gurling, Christina M. Hultman, Assen V. Jablensky, Kenneth S. Kendler, Jo Knight, Qingqin S. Li, Jianjun Liu, Steven A. McCarroll, Jennifer L. Moran, Michael J. Owen, Carlos N. Pato, Danielle Posthuma, Pamela Sklar, Jens R. Wendland, Mark J. Daly, Michael C. O’Donovan, Peter Donnelly, Ines Barroso, Jenefer M. Blackwell, Matthew A. Brown, Juan P. Casas, Panos Deloukas, Audrey Duncanson, Janusz Jankowski, Hugh S. Markus, Christopher G. Mathew, Colin N.A. Palmer, Robert Plomin, Anna Rautanen, Stephen J. Sawcer, Richard C. Trembath, Ananth C. Viswanathan, Nicholas W. Wood, Gavin Band, Céline Bellenguez, Colin Freeman, Eleni Giannoulatou, Garrett Hellenthal, Richard Pearson, Matti Pirinen, Amy Strange, Zhan Su, Damjan Vukcevic, Cordelia Langford, Hannah Blackburn, Suzannah J. Bumpstead, Serge Dronov, Sarah Edkins, Matthew Gillman, Emma Gray, Rhian Gwilliam, Naomi Hammond, Sarah E. Hunt, Alagurevathi Jayakumar, Jennifer Liddle, Owen T. McCann, Simon C. Potter, Radhi Ravindrarajah, Michelle Ricketts, Avazeh Tashakkori-Ghanbaria, Matthew Waller, Paul Weston, Pamela Whittaker, Sara Widaa, Mark I. McCarthy, Maria J. Arranz, Steven Bakker, Stephan Bender, Benedicto Crespo-Facorro, Jeremy Hall, Conrad Iyegbe, Stephen Lawrie, Kuang Lin, Don H. Linszen, Ignacio Mata, Muriel Walshe, Matthias Weisbrod, Durk Wiersma, Vassily Trubetskoy, Yunpeng Wang, Jonathan R.I. Coleman, Héléna A. Gaspar, Christiaan A. de Leeuw, Jennifer M. Whitehead Pavlides, Maciej Trzaskowski, Enda M. Byrne, Liam Abbott, Huda Akil, Diego Albani, Ney Alliey-Rodriguez, Adebayo Anjorin, Verneri Antilla, Swapnil Awasthi, Judith A. Badner, Marie Bækvad-Hansen, Jack D. Barchas, Nicholas Bass, Michael Bauer, Richard Belliveau, Carsten Bøcker Pedersen, Erlend Bøen, Marco P. Boks, James Boocock, Monika Budde, William Bunney, Margit Burmeister, Jonas Bybjerg-Grauholm, Miquel Casas, Felecia Cerrato, Kimberly Chambert, Alexander W. Charney, Danfeng Chen, Claire Churchhouse, Toni-Kim Clarke, William Coryell, David W. Craig, Cristiana Cruceanu, Piotr M. Czerski, Anders M. Dale, Simone de Jong, Jurgen Del-Favero, J. Raymond DePaulo, Amanda L. Dobbyn, Ashley Dumont, Torbjørn Elvsåshagen, Chun Chieh Fan, Sascha B. Fischer, Matthew Flickinger, Tatiana M. Foroud, Liz Forty, Christine Fraser, Katrin Gade, Diane Gage, Julie Garnham, Claudia Giambartolomei, Marianne Giørtz Pedersen, Jaqueline Goldstein, Scott D. Gordon, Katherine Gordon-Smith, Elaine K. Green, Melissa J. Green, Tiffany A. Greenwood, Weihua Guan, Martin Hautzinger, Urs Heilbronner, Maria Hipolito, Dominic Holland, Laura Huckins, Jessica S. Johnson, Radhika Kandaswamy, Robert Karlsson, Sarah Kittel-Schneider, Anna C. Koller, Ralph Kupka, Catharina Lavebratt, Jacob Lawrence, William B. Lawson, Markus Leber, Phil H. Lee, Shawn E. Levy, Jun Z. Li, Chunyu Liu, Anna Maaser, Donald J. MacIntyre, Pamela B. Mahon, Lina Martinsson, Steve McCarroll, Peter McGuffin, Melvin G. McInnis, James D. McKay, Helena Medeiros, Sarah E. Medland, Fan Meng, Grant W. Montgomery, Thomas W. Mühleisen, Hoang Nguyen, Caroline M. Nievergelt, Annelie Nordin Adolfsson, Evaristus A. Nwulia, Claire O'Donovan, Loes M. Olde Loohuis, Anil P.S. Ori, Lilijana Oruc, Urban Ösby, Amy Perry, Andrea Pfennig, Eline J. Regeer, Céline S. Reinbold, John P. Rice, Fabio Rivas, Margarita Rivera, Euijung Ryu, Cristina Sánchez-Mora, Alan F. Schatzberg, William A. Scheftner, Nicholas J. Schork, Cynthia Shannon Weickert, Tatyana Shehktman, Paul D. Shilling, Claire Slaney, Janet L. Sobell, Christine Søholm Hansen, Anne T. Spijker, Michael Steffens, John S. Strauss, Szabolcs Szelinger, Robert C. Thompson, Thorgeir E. Thorgeirsson, Jens Treutlein, Helmut Vedder, Weiqing Wang, Stanley J. Watson, Thomas W. Weickert, Simon Xi, Wei Xu, Allan H. Young, Peter Zandi, Peng Zhang, Sebastian Zöllner, Abdel Abdellaoui, Tracy M. Air, Till F.M. Andlauer, Silviu-Alin Bacanu, Aartjan T.F. Beekman, Elisabeth B. Binder, Julien Bryois, Henriette N. Buttenschøn, Na Cai, Enrique Castelao, Jane Hvarregaard Christensen, Lucía Colodro-Conde, Baptiste Couvy-Duchesne, Gregory E. Crawford, Gail Davies, Ian J. Deary, Eske M. Derks, Nese Direk, Conor V. Dolan, Erin C. Dunn, Thalia C. Eley, Farnush Farhadi Hassan Kiadeh, Hilary K. Finucane, Jerome C. Foo, Fernando S. Goes, Lynsey S. Hall, Thomas F. Hansen, Ian B. Hickie, Georg Homuth, Carsten Horn, David M. Howard, Marcus Ising, Rick Jansen, Ian Jones, Lisa A. Jones, Eric Jorgenson, Isaac S. Kohane, Julia Kraft, Warren W. Kretzschmar, Zoltán Kutalik, Yihan Li, Penelope A. Lind, Dean F. MacKinnon, Robert M. Maier, Jonathan Marchini, Hamdi Mbarek, Patrick McGrath, Christel M. Middeldorp, Evelin Mihailov, Francis M. Mondimore, Sara Mostafavi, Matthias Nauck, Bernard Ng, Michel G. Nivard, Dale R. Nyholt, Paul F. O'Reilly, Hogni Oskarsson, Jodie N. Painter, Roseann E. Peterson, Wouter J. Peyrot, Giorgio Pistis, Jorge A. Quiroz, Per Qvist, Saira Saeed Mirza, Robert Schoevers, Eva C. Schulte, Ling Shen, Stanley I. Shyn, Grant C.B. Sinnamon, Johannes H. Smit, Daniel J. Smith, Katherine E. Tansey, Henning Teismann, Wesley Thompson, Pippa A. Thomson, Matthew Traylor, André G. Uitterlinden, Daniel Umbricht, Albert M. van Hemert, Shantel Marie Weinsheimer, Jürgen Wellmann, Yang Wu, Hualin S. Xi, Jian Yang, Futao Zhang, Volker Arolt, Klaus Berger, Udo Dannlowski, Katharina Domschke, Caroline Hayward, Andrew C. Heath, Stefan Kloiber, Glyn Lewis, Pamela AF. Madden, Patrik K. Magnusson, Preben Bo Mortensen, Michael C. O'Donovan, Sara A. Paciga, Nancy L. Pedersen, David J. Porteous, Catherine Schaefer, Henry Völzke, Marco Bortolato, Janita Bralten, Cynthia M. Bulik, Christie L. Burton, Caitlin E. Carey, Lea K. Davis, Laramie E. Duncan, Howard J. Edenberg, Lauren Erdman, Stephen V. Faraone, Slavina B. Goleva, Wei Guo, Christopher Hübel, Laura M. Huckins, Ekaterina A. Khramtsova, Joanna Martin, Carol A. Mathews, Elise Robinson, Eli Stahl, Barbara E. Stranger, Michela Traglia, Raymond K. Walters, Lauren A. Weiss, Stacey J. Winham, Yin Yao, Kristjar Skajaa, Markus Nöthen, Michael Owen, Robert H. Yolken, Niels Plath, Jonathan Mill, Daniel Geschwind, Psychiatry 1, RS: MHeNs - R2 - Mental Health, Psychiatrie & Neuropsychologie, Centre of Excellence in Complex Disease Genetics, Research Programme of Molecular Medicine, Research Programs Unit, Aarno Palotie / Principal Investigator, Institute for Molecular Medicine Finland, Genomics of Neurological and Neuropsychiatric Disorders, Functional Genomics, Biological Psychology, APH - Mental Health, APH - Methodology, Sociology and Social Gerontology, APH - Personalized Medicine, APH - Health Behaviors & Chronic Diseases, Blokland, Gabriella AM, Grove, Jakob, Chen, Chia Yen, Cotsapas, Chris, Tobet, Stuart, Handa, Robert, Lee, Sang Hong, Schizophrenia Working Group of the Psychiatric Genomics Consortium, Bipolar Disorder Working Group of the Psychiatric Genomics Consortium, Major Depressive Disorder Working Group of the Psychiatric Genomics Consortium, Sex Differences Cross-Disorder Analysis Group of the Psychiatric Genomics Consortium, iPSYCH, Psychiatry, Amsterdam Neuroscience - Complex Trait Genetics, Amsterdam Neuroscience - Mood, Anxiety, Psychosis, Stress & Sleep, Human genetics, Amsterdam Neuroscience - Compulsivity, Impulsivity & Attention, Amsterdam Reproduction & Development (AR&D), Child and Adolescent Psychiatry / Psychology, Adult Psychiatry, ANS - Complex Trait Genetics, and ANS - Mood, Anxiety, Psychosis, Stress & Sleep

Subjects
0301 basic medicine, Male, Bipolar Disorder, Schizophrenia/genetics, LD SCORE REGRESSION, Genome-wide association study, 0302 clinical medicine, Receptors, SCHIZOPHRENIA, Psychotic Disorders/genetics, KYNURENINE PATHWAY METABOLISM, Genetics, RISK, Sex Characteristics, Vascular Endothelial Growth Factor, Bipolar Disorder/genetics, Major/genetics, Single Nucleotide, AFFECTIVE STIMULI IMPACT, Schizophrenia, Sulfurtransferases, Major depressive disorder, Female, Depressive Disorder, Major/genetics, Bipolar disorder, Locus (genetics), Genomics, Biology, Polymorphism, Single Nucleotide, Article, DYSPHORIC MOOD, 03 medical and health sciences, Sex differences, medicine, Humans, Genetic Predisposition to Disease, ddc:610, Polymorphism, GENOME-WIDE ASSOCIATION, Genotype-by-sex interaction, Biological Psychiatry, Depressive Disorder, Major, Depressive Disorder, GENDER-DIFFERENCES, Neurodevelopmental disorders Donders Center for Medical Neuroscience [Radboudumc 7], PARAVENTRICULAR NUCLEUS, 3112 Neurosciences, Endothelial Cells, MAJOR DEPRESSION, medicine.disease, Genetic architecture, 030104 developmental biology, Mood, Receptors, Vascular Endothelial Growth Factor, Psychotic Disorders, 3111 Biomedicine, 030217 neurology & neurosurgery, Genome-Wide Association Study
Abstract

Contains fulltext : 248656.pdf (Publisher’s version ) (Closed access) BACKGROUND: Sex differences in incidence and/or presentation of schizophrenia (SCZ), major depressive disorder (MDD), and bipolar disorder (BIP) are pervasive. Previous evidence for shared genetic risk and sex differences in brain abnormalities across disorders suggest possible shared sex-dependent genetic risk. METHODS: We conducted the largest to date genome-wide genotype-by-sex (G×S) interaction of risk for these disorders using 85,735 cases (33,403 SCZ, 19,924 BIP, and 32,408 MDD) and 109,946 controls from the PGC (Psychiatric Genomics Consortium) and iPSYCH. RESULTS: Across disorders, genome-wide significant single nucleotide polymorphism-by-sex interaction was detected for a locus encompassing NKAIN2 (rs117780815, p = 3.2 × 10(-8)), which interacts with sodium/potassium-transporting ATPase (adenosine triphosphatase) enzymes, implicating neuronal excitability. Three additional loci showed evidence (p < 1 × 10(-6)) for cross-disorder G×S interaction (rs7302529, p = 1.6 × 10(-7); rs73033497, p = 8.8 × 10(-7); rs7914279, p = 6.4 × 10(-7)), implicating various functions. Gene-based analyses identified G×S interaction across disorders (p = 8.97 × 10(-7)) with transcriptional inhibitor SLTM. Most significant in SCZ was a MOCOS gene locus (rs11665282, p = 1.5 × 10(-7)), implicating vascular endothelial cells. Secondary analysis of the PGC-SCZ dataset detected an interaction (rs13265509, p = 1.1 × 10(-7)) in a locus containing IDO2, a kynurenine pathway enzyme with immunoregulatory functions implicated in SCZ, BIP, and MDD. Pathway enrichment analysis detected significant G×S interaction of genes regulating vascular endothelial growth factor receptor signaling in MDD (false discovery rate-corrected p < .05). CONCLUSIONS: In the largest genome-wide G×S analysis of mood and psychotic disorders to date, there was substantial genetic overlap between the sexes. However, significant sex-dependent effects were enriched for genes related to neuronal development and immune and vascular functions across and within SCZ, BIP, and MDD at the variant, gene, and pathway levels.

Published
2022

8. Dissecting the Shared Genetic Architecture of Suicide Attempt, Psychiatric Disorders, and Known Risk Factors

Author

Niamh Mullins, JooEun Kang, Adrian I. Campos, Jonathan R.I. Coleman, Alexis C. Edwards, Hanga Galfalvy, Daniel F. Levey, Adriana Lori, Andrey Shabalin, Anna Starnawska, Mei-Hsin Su, Hunna J. Watson, Mark Adams, Swapnil Awasthi, Michael Gandal, Jonathan D. Hafferty, Akitoyo Hishimoto, Minsoo Kim, Satoshi Okazaki, Ikuo Otsuka, Stephan Ripke, Erin B. Ware, Andrew W. Bergen, Wade H. Berrettini, Martin Bohus, Harry Brandt, Xiao Chang, Wei J. Chen, Hsi-Chung Chen, Steven Crawford, Scott Crow, Emily DiBlasi, Philibert Duriez, Fernando Fernández-Aranda, Manfred M. Fichter, Steven Gallinger, Stephen J. Glatt, Philip Gorwood, Yiran Guo, Hakon Hakonarson, Katherine A. Halmi, Hai-Gwo Hwu, Sonia Jain, Stéphane Jamain, Susana Jiménez-Murcia, Craig Johnson, Allan S. Kaplan, Walter H. Kaye, Pamela K. Keel, James L. Kennedy, Kelly L. Klump, Dong Li, Shih-Cheng Liao, Klaus Lieb, Lisa Lilenfeld, Chih-Min Liu, Pierre J. Magistretti, Christian R. Marshall, James E. Mitchell, Eric T. Monson, Richard M. Myers, Dalila Pinto, Abigail Powers, Nicolas Ramoz, Stefan Roepke, Vsevolod Rozanov, Stephen W. Scherer, Christian Schmahl, Marcus Sokolowski, Michael Strober, Laura M. Thornton, Janet Treasure, Ming T. Tsuang, Stephanie H. Witt, D. Blake Woodside, Zeynep Yilmaz, Lea Zillich, Rolf Adolfsson, Ingrid Agartz, Tracy M. Air, Martin Alda, Lars Alfredsson, Ole A. Andreassen, Adebayo Anjorin, Vivek Appadurai, María Soler Artigas, Sandra Van der Auwera, M. Helena Azevedo, Nicholas Bass, Claiton H.D. Bau, Bernhard T. Baune, Frank Bellivier, Klaus Berger, Joanna M. Biernacka, Tim B. Bigdeli, Elisabeth B. Binder, Michael Boehnke, Marco P. Boks, Rosa Bosch, David L. Braff, Richard Bryant, Monika Budde, Enda M. Byrne, Wiepke Cahn, Miguel Casas, Enrique Castelao, Jorge A. Cervilla, Boris Chaumette, Sven Cichon, Aiden Corvin, Nicholas Craddock, David Craig, Franziska Degenhardt, Srdjan Djurovic, Howard J. Edenberg, Ayman H. Fanous, Jerome C. Foo, Andreas J. Forstner, Mark Frye, Janice M. Fullerton, Justine M. Gatt, Pablo V. Gejman, Ina Giegling, Hans J. Grabe, Melissa J. Green, Eugenio H. Grevet, Maria Grigoroiu-Serbanescu, Blanca Gutierrez, Jose Guzman-Parra, Steven P. Hamilton, Marian L. Hamshere, Annette Hartmann, Joanna Hauser, Stefanie Heilmann-Heimbach, Per Hoffmann, Marcus Ising, Ian Jones, Lisa A. Jones, Lina Jonsson, René S. Kahn, John R. Kelsoe, Kenneth S. Kendler, Stefan Kloiber, Karestan C. Koenen, Manolis Kogevinas, Bettina Konte, Marie-Odile Krebs, Mikael Landén, Jacob Lawrence, Marion Leboyer, Phil H. Lee, Douglas F. Levinson, Calwing Liao, Jolanta Lissowska, Susanne Lucae, Fermin Mayoral, Susan L. McElroy, Patrick McGrath, Peter McGuffin, Andrew McQuillin, Sarah E. Medland, Divya Mehta, Ingrid Melle, Yuri Milaneschi, Philip B. Mitchell, Esther Molina, Gunnar Morken, Preben Bo Mortensen, Bertram Müller-Myhsok, Caroline Nievergelt, Vishwajit Nimgaonkar, Markus M. Nöthen, Michael C. O’Donovan, Roel A. Ophoff, Michael J. Owen, Carlos Pato, Michele T. Pato, Brenda W.J.H. Penninx, Jonathan Pimm, Giorgio Pistis, James B. Potash, Robert A. Power, Martin Preisig, Digby Quested, Josep Antoni Ramos-Quiroga, Andreas Reif, Marta Ribasés, Vanesa Richarte, Marcella Rietschel, Margarita Rivera, Andrea Roberts, Gloria Roberts, Guy A. Rouleau, Diego L. Rovaris, Dan Rujescu, Cristina Sánchez-Mora, Alan R. Sanders, Peter R. Schofield, Thomas G. Schulze, Laura J. Scott, Alessandro Serretti, Jianxin Shi, Stanley I. Shyn, Lea Sirignano, Pamela Sklar, Olav B. Smeland, Jordan W. Smoller, Edmund J.S. Sonuga-Barke, Gianfranco Spalletta, John S. Strauss, Beata Świątkowska, Maciej Trzaskowski, Gustavo Turecki, Laura Vilar-Ribó, John B. Vincent, Henry Völzke, James T.R. Walters, Cynthia Shannon Weickert, Thomas W. Weickert, Myrna M. Weissman, Leanne M. Williams, Naomi R. Wray, Clement C. Zai, Allison E. Ashley-Koch, Jean C. Beckham, Elizabeth R. Hauser, Michael A. Hauser, Nathan A. Kimbrel, Jennifer H. Lindquist, Benjamin McMahon, David W. Oslin, Xuejun Qin, Esben Agerbo, Anders D. Børglum, Gerome Breen, Annette Erlangsen, Tõnu Esko, Joel Gelernter, David M. Hougaard, Ronald C. Kessler, Henry R. Kranzler, Qingqin S. Li, Nicholas G. Martin, Andrew M. McIntosh, Ole Mors, Merete Nordentoft, Catherine M. Olsen, David Porteous, Robert J. Ursano, Danuta Wasserman, Thomas Werge, David C. Whiteman, Cynthia M. Bulik, Hilary Coon, Ditte Demontis, Anna R. Docherty, Po-Hsiu Kuo, Cathryn M. Lewis, J. John Mann, Miguel E. Rentería, Daniel J. Smith, Eli A. Stahl, Murray B. Stein, Fabian Streit, Virginia Willour, Douglas M. Ruderfer, Manuel Mattheisen, Abdel Abdellaoui, Mark J. Adams, Till F.M. Andlauer, Silviu-Alin Bacanu, Marie Bækvad-Hansen, Aartjan T.F. Beekman, Julien Bryois, Henriette N. Buttenschøn, Jonas Bybjerg-Grauholm, Na Cai, Jane Hvarregaard Christensen, Toni-Kim Clarke, Lucía Colodro-Conde, Baptiste Couvy-Duchesne, Nick Craddock, Gregory E. Crawford, Gail Davies, Eske M. Derks, Nese Direk, Conor V. Dolan, Erin C. Dunn, Thalia C. Eley, Valentina Escott-Price, Farnush Farhadi Hassan Kiadeh, Hilary K. Finucane, Josef Frank, Héléna A. Gaspar, Michael Gill, Fernando S. Goes, Scott D. Gordon, Shantel Marie Weinsheimer, Jürgen Wellmann, Gonneke Willemsen, Yang Wu, Hualin S. Xi, Jian Yang, Futao Zhang, Volker Arolt, Dorret I. Boomsma, Udo Dannlowski, E.J.C. de Geus, J. Raymond Depaulo, Enrico Domenici, Katharina Domschke, Jakob Grove, Lynsey S. Hall, Christine Søholm Hansen, Thomas F. Hansen, Stefan Herms, Ian B. Hickie, Georg Homuth, Carsten Horn, Jouke-Jan Hottenga, David M. Howard, Rick Jansen, Eric Jorgenson, James A. Knowles, Isaac S. Kohane, Julia Kraft, Warren W. Kretzschmar, Zoltán Kutalik, Yihan Li, Penelope A. Lind, Donald J. MacIntyre, Dean F. MacKinnon, Robert M. Maier, Wolfgang Maier, Jonathan Marchini, Hamdi Mbarek, Christel M. Middeldorp, Evelin Mihailov, Lili Milani, Francis M. Mondimore, Grant W. Montgomery, Sara Mostafavi, Matthias Nauck, Bernard Ng, Michel G. Nivard, Dale R. Nyholt, Paul F. O’Reilly, Hogni Oskarsson, Caroline Hayward, Andrew C. Heath, Glyn Lewis, Pamela A.F. Madden, Patrik K. Magnusson, Andres Metspalu, Sara A. Paciga, Nancy L. Pedersen, Jodie N. Painter, Carsten Bøcker Pedersen, Marianne Giørtz Pedersen, Roseann E. Peterson, Wouter J. Peyrot, Danielle Posthuma, Jorge A. Quiroz, Per Qvist, John P. Rice, Brien P. Riley, Saira Saeed Mirza, Robert Schoevers, Eva C. Schulte, Ling Shen, Engilbert Sigurdsson, Grant C.B. Sinnamon, Johannes H. Smit, Hreinn Stefansson, Stacy Steinberg, Jana Strohmaier, Katherine E. Tansey, Henning Teismann, Alexander Teumer, Wesley Thompson, Pippa A. Thomson, Thorgeir E. Thorgeirsson, Matthew Traylor, Jens Treutlein, Vassily Trubetskoy, André G. Uitterlinden, Daniel Umbricht, Albert M. van Hemert, Alexander Viktorin, Peter M. Visscher, Yunpeng Wang, Bradley T. Webb, Roy H. Perlis, David J. Porteous, Catherine Schaefer, Kari Stefansson, Henning Tiemeier, Rudolf Uher, Patrick F. Sullivan, Kevin S. O’Connell, Brandon Coombes, Zhen Qiao, Thomas D. Als, Sigrid Børte, Alexander W. Charney, Ole Kristian Drange, Michael J. Gandal, Saskia P. Hagenaars, Masashi Ikeda, Nolan Kamitaki, Kristi Krebs, Georgia Panagiotaropoulou, Brian M. Schilder, Laura G. Sloofman, Bendik S. Winsvold, Hong-Hee Won, Liliya Abramova, Kristina Adorjan, Mariam Al Eissa, Diego Albani, Ney Alliey-Rodriguez, Verneri Antilla, Anastasia Antoniou, Ji Hyun Baek, Michael Bauer, Eva C. Beins, Sarah E. Bergen, Armin Birner, Erlend Bøen, Murielle Brum, Ben M. Brumpton, Nathalie Brunkhorst-Kanaan, William Byerley, Murray Cairns, Miquel Casas, Pablo Cervantes, Cristiana Cruceanu, Alfredo Cuellar-Barboza, Julie Cunningham, David Curtis, Piotr M. Czerski, Anders M. Dale, Nina Dalkner, Friederike S. David, Amanda L. Dobbyn, Athanassios Douzenis, Torbjørn Elvsåshagen, I. Nicol Ferrier, Alessia Fiorentino, Tatiana M. Foroud, Liz Forty, Oleksandr Frei, Nelson B. Freimer, Louise Frisén, Katrin Gade, Julie Garnham, Ian R. Gizer, Katherine Gordon-Smith, Tiffany A. Greenwood, José Guzman-Parra, Kyooseob Ha, Magnus Haraldsson, Martin Hautzinger, Urs Heilbronner, Dennis Hellgren, Peter A. Holmans, Laura Huckins, Jessica S. Johnson, Janos L. Kalman, Yoichiro Kamatani, Sarah Kittel-Schneider, Maria Koromina, Thorsten M. Kranz, Michiaki Kubo, Ralph Kupka, Steven A. Kushner, Catharina Lavebratt, Markus Leber, Heon-Jeong Lee, Shawn E. Levy, Catrin Lewis, Martin Lundberg, Sigurdur H. Magnusson, Adam Maihofer, Dolores Malaspina, Eirini Maratou, Lina Martinsson, Nathaniel W. McGregor, James D. McKay, Helena Medeiros, Vincent Millischer, Jennifer L. Moran, Derek W. Morris, Thomas W. Mühleisen, Niamh O’Brien, Claire O’Donovan, Loes M. Olde Loohuis, Lilijana Oruc, Sergi Papiol, Antonio F. Pardiñas, Amy Perry, Andrea Pfennig, Evgenia Porichi, Towfique Raj, Mark H. Rapaport, J. Raymond DePaulo, Eline J. Regeer, Fabio Rivas, Julian Roth, Panos Roussos, Fanny Senner, Sally Sharp, Paul D. Shilling, Claire Slaney, Janet L. Sobell, Maria Soler Artigas, Anne T. Spijker, Dan J. Stein, Chikashi Terao, Claudio Toma, Paul Tooney, Evangelia-Eirini Tsermpini, Marquis P. Vawter, Helmut Vedder, Simon Xi, Wei Xu, Jessica Mei Kay Yang, Allan H. Young, Hannah Young, Peter P. Zandi, Hang Zhou, null HUNT All-In Psychiatry, Gulja Babadjanova, Lena Backlund, Susanne Bengesser, Douglas H.R. Blackwood, Vaughan J. Carr, Stanley Catts, Dimitris Dikeos, Bruno Etain, Panagiotis Ferentinos, Micha Gawlik, Elliot S. Gershon, Frans Henskens, Jan Hillert, Kyung Sue Hong, Christina M. Hultman, Kristian Hveem, Nakao Iwata, Assen V. Jablensky, George Kirov, Christine Lochner, Carmel Loughland, Carol A. Mathews, Francis J. McMahon, Patricia Michie, Bryan Mowry, Benjamin M. Neale, Caroline M. Nievergelt, Ketil J. Oedegaard, Tomas Olsson, Chris Pantelis, George P. Patrinos, Eva Z. Reininghaus, Takeo Saito, Ulrich Schall, Martin Schalling, Rodney J. Scott, Eystein Stordal, Arne E. Vaaler, Eduard Vieta, Irwin D. Waldman, John-Anker Zwart, John I. Nurnberger, Arianna Di Florio, Roger A.H. Adan, Tetsuya Ando, Harald Aschauer, Jessica H. Baker, Vladimir Bencko, Andreas Birgegård, Joseph M. Boden, Ilka Boehm, Claudette Boni, Vesna Boraska Perica, Katharina Buehren, Roland Burghardt, Laura Carlberg, Matteo Cassina, Maurizio Clementi, Roger D. Cone, Philippe Courtet, James J. Crowley, Unna N. Danner, Oliver S.P. Davis, Martina de Zwaan, George Dedoussis, Daniela Degortes, Janiece E. DeSocio, Danielle M. Dick, Christian Dina, Monika Dmitrzak-Weglarz, Elisa Docampo Martinez, Laramie E. Duncan, Karin Egberts, Morten Mattingsdal, Sara McDevitt, Ingrid Meulenbelt, Nadia Micali, James Mitchell, Karen Mitchell, Palmiero Monteleone, Alessio Maria Monteleone, Melissa A. Munn-Chernoff, Benedetta Nacmias, Marie Navratilova, Ioanna Ntalla, Julie K. O’Toole, Leonid Padyukov, Aarno Palotie, Jacques Pantel, Hana Papezova, Richard Parker, John F. Pearson, Stefan Ehrlich, Geòrgia Escaramís, Thomas Espeseth, Xavier Estivill, Anne Farmer, Angela Favaro, Krista Fischer, James A.B. Floyd, Manuel Föcker, Lenka Foretova, Monica Forzan, Christopher S. Franklin, Giovanni Gambaro, Johanna Giuranna, Paola Giusti-Rodríquez, Fragiskos Gonidakis, Scott Gordon, Monica Gratacos Mayora, Sébastien Guillaume, Ken B. Hanscombe, Konstantinos Hatzikotoulas, Johannes Hebebrand, Sietske G. Helder, Anjali K. Henders, Beate Herpertz-Dahlmann, Wolfgang Herzog, Anke Hinney, L. John Horwood, Christopher Hübel, Liselotte V. Petersen, Kirstin L. Purves, Anu Raevuori, Ted Reichborn-Kjennerud, Valdo Ricca, Samuli Ripatti, Franziska Ritschel, Marion Roberts, Filip Rybakowski, Paolo Santonastaso, André Scherag, Ulrike Schmidt, Nicholas J. Schork, Alexandra Schosser, Jochen Seitz, Lenka Slachtova, P. Eline Slagboom, Margarita C.T. Slof-Op ‘t Landt, Agnieszka Slopien, Nicole Soranzo, Sandro Sorbi, Lorraine Southam, Vidar W. Steen, Laura M. Huckins, James I. Hudson, Hartmut Imgart, Hidetoshi Inoko, Vladimir Janout, Jennifer Jordan, Antonio Julià, Gursharan Kalsi, Deborah Kaminská, Jaakko Kaprio, Leila Karhunen, Andreas Karwautz, Martien J.H. Kas, Martin A. Kennedy, Anna Keski-Rahkonen, Kirsty Kiezebrink, Youl-Ri Kim, Katherine M. Kirk, Lars Klareskog, Gun Peggy S. Knudsen, Janne T. Larsen, Stephanie Le Hellard, Virpi M. Leppä, Paul Lichtenstein, Bochao Danae Lin, Astri Lundervold, Jurjen Luykx, Mario Maj, Katrin Mannik, Sara Marsal, Garret D. Stuber, Jin P. Szatkiewicz, Ioanna Tachmazidou, Elena Tenconi, Alfonso Tortorella, Federica Tozzi, Artemis Tsitsika, Marta Tyszkiewicz-Nwafor, Konstantinos Tziouvas, Annemarie A. van Elburg, Eric F. van Furth, Tracey D. Wade, Gudrun Wagner, Esther Walton, H. Erich Wichmann, Elisabeth Widen, Shuyang Yao, Eleftheria Zeggini, Stephanie Zerwas, Stephan Zipfel, Martin Jungkunz, Lydie Dietl, Cornelia E. Schwarze, Norbert Dahmen, Björn H. Schott, Arian Mobascher, Silvia Crivelli, Michelle F. Dennis, Phillip D. Harvey, Bruce W. Carter, Jennifer E. Huffman, Daniel Jacobson, Ravi Madduri, Maren K. Olsen, John Pestian, J. Michael Gaziano, Sumitra Muralidhar, Rachel Ramoni, Jean Beckham, Kyong-Mi Chang, Christopher J. O’Donnell, Philip S. Tsao, James Breeling, Grant Huang, J.P. Casas Romero, Jennifer Moser, Stacey B. Whitbourne, Jessica V. Brewer, Mihaela Aslan, Todd Connor, Dean P. Argyres, Brady Stephens, Mary T. Brophy, Donald E. Humphries, Luis E. Selva, Nhan Do, Shahpoor Shayan, Kelly Cho, Saiju Pyarajan, Elizabeth Hauser, Yan Sun, Hongyu Zhao, Peter Wilson, Rachel McArdle, Louis Dellitalia, Kristin Mattocks, John Harley, Clement J. Zablocki, Jeffrey Whittle, Frank Jacono, Salvador Gutierrez, Gretchen Gibson, Kimberly Hammer, Laurence Kaminsky, Gerardo Villareal, Scott Kinlay, Junzhe Xu, Mark Hamner, Roy Mathew, Sujata Bhushan, Pran Iruvanti, Michael Godschalk, Zuhair Ballas, Douglas Ivins, Stephen Mastorides, Jonathan Moorman, Saib Gappy, Jon Klein, Nora Ratcliffe, Hermes Florez, Olaoluwa Okusaga, Maureen Murdoch, Peruvemba Sriram, Shing Shing Yeh, Neeraj Tandon, Darshana Jhala, Samuel Aguayo, David Cohen, Satish Sharma, Suthat Liangpunsakul, Kris Ann Oursler, Mary Whooley, Sunil Ahuja, Joseph Constans, Paul Meyer, Jennifer Greco, Michael Rauchman, Richard Servatius, Melinda Gaddy, Agnes Wallbom, Timothy Morgan, Todd Stapley, Scott Sherman, George Ross, Philip Tsao, Patrick Strollo, Edward Boyko, Laurence Meyer, Samir Gupta, Mostaqul Huq, Joseph Fayad, Adriana Hung, Jack Lichy, Robin Hurley, Brooks Robey, Robert Striker, Dietl, Lydie, Schwarze, Cornelia E., Dahmen, Norbert, Schott, Björn H., Nöthen, Markus M., Ripke, Stephan, Mobascher, Arian, Rujescu, Dan, Lieb, Klaus, Roepke, Stefan, Schmahl, Christian, Bohus, Martin, Rietschel, Marcella, Crivelli, Silvia, Dennis, Michelle F., Harvey, Phillip D., Carter, Bruce W., Huffman, Jennifer E., Jacobson, Daniel, Madduri, Ravi, Olsen, Maren K., Pestian, John, Gaziano, J. Michael, Muralidhar, Sumitra, Ramoni, Rachel, Beckham, Jean, Chang, Kyong-Mi, O'Donnell, Christopher J., Tsao, Philip S., Breeling, James, Huang, Grant, Romero, J. P. Casas, Moser, Jennifer, Whitbourne, Stacey B., Brewer, Jessica V., Aslan, Mihaela, Connor, Todd, Argyres, Dean P., Stephens, Brady, Brophy, Mary T., Humphries, Donald E., Selva, Luis E., Do, Nhan, Shayan, Shahpoor, Cho, Kelly, Pyarajan, Saiju, Hauser, Elizabeth, Sun, Yan, Zhao, Hongyu, Wilson, Peter, McArdle, Rachel, Dellitalia, Louis, Mattocks, Kristin, Harley, John, Zablocki, Clement J., Whittle, Jeffrey, Jacono, Frank, Gutierrez, Salvador, Gibson, Gretchen, Hammer, Kimberly, Kaminsky, Laurence, Villareal, Gerardo, Kinlay, Scott, Xu, Junzhe, Hamner, Mark, Mathew, Roy, Bhushan, Sujata, Iruvanti, Pran, Godschalk, Michael, Ballas, Zuhair, Ivins, Douglas, Mastorides, Stephen, Moorman, Jonathan, Gappy, Saib, Klein, Jon, Ratcliffe, Nora, Florez, Hermes, Okusaga, Olaoluwa, Murdoch, Maureen, Sriram, Peruvemba, Yeh, Shing Shing, Tandon, Neeraj, Jhala, Darshana, Aguayo, Samuel, Cohen, David, Sharma, Satish, Liangpunsakul, Suthat, Oursler, Kris Ann, Whooley, Mary, Ahuja, Sunil, Constans, Joseph, Meyer, Paul, Greco, Jennifer, Rauchman, Michael, Servatius, Richard, Gaddy, Melinda, Wallbom, Agnes, Morgan, Timothy, Stapley, Todd, Sherman, Scott, Ross, George, Tsao, Philip, Strollo, Patrick, Boyko, Edward, Meyer, Laurence, Gupta, Samir, Huq, Mostaqul, Fayad, Joseph, Hung, Adriana, Lichy, Jack, Hurley, Robin, Robey, Brooks, Striker, Robert, Wray, Naomi R., Mattheisen, Manuel, Trzaskowski, Maciej, Byrne, Enda M., Abdellaoui, Abdel, Adams, Mark J., Agerbo, Esben, Air, Tracy M., Andlauer, Till F. M., Bacanu, Silviu-Alin, Bækvad-Hansen, Marie, Beekman, Aartjan T. F., Bigdeli, Tim B., Binder, Elisabeth B., Bryois, Julien, Buttenschøn, Henriette N., Bybjerg-Grauholm, Jonas, Cai, Na, Castelao, Enrique, Christensen, Jane Hvarregaard, Clarke, Toni-Kim, Coleman, Jonathan R. I., Colodro-Conde, Lucía, Couvy-Duchesne, Baptiste, Craddock, Nick, Crawford, Gregory E., Davies, Gail, Degenhardt, Franziska, Derks, Eske M., Direk, Nese, Dolan, Conor V., Dunn, Erin C., Eley, Thalia C., Escott-Price, Valentina, Hassan Kiadeh, Farnush Farhadi, Finucane, Hilary K., Foo, Jerome C., Forstner, Andreas J., Frank, Josef, Gaspar, Héléna A., Gill, Michael, Goes, Fernando S., Gordon, Scott D., Weinsheimer, Shantel Marie, Wellmann, Jürgen, Willemsen, Gonneke, Witt, Stephanie H., Wu, Yang, Xi, Hualin S., Yang, Jian, Zhang, Futao, Arolt, Volker, Baune, Bernhard T., Berger, Klaus, Boomsma, Dorret I., Cichon, Sven, Dannlowski, Udo, de Geus, E. J. C., DePaulo, J. Raymond, Domenici, Enrico, Domschke, Katharina, Esko, Tõnu, Grabe, Hans J., Hamilton, Steven P., Grove, Jakob, Hall, Lynsey S., Hansen, Christine Søholm, Hansen, Thomas F., Herms, Stefan, Hickie, Ian B., Hoffmann, Per, Homuth, Georg, Horn, Carsten, Hottenga, Jouke-Jan, Hougaard, David M., Howard, David M., Ising, Marcus, Jansen, Rick, Jones, Ian, Jones, Lisa A., Jorgenson, Eric, Knowles, James A., Kohane, Isaac S., Kraft, Julia, Kretzschmar, Warren W., Kutalik, Zoltán, Li, Yihan, Lind, Penelope A., MacIntyre, Donald J., MacKinnon, Dean F., Maier, Robert M., Maier, Wolfgang, Marchini, Jonathan, Mbarek, Hamdi, McGrath, Patrick, McGuffin, Peter, Medland, Sarah E., Mehta, Divya, Middeldorp, Christel M., Mihailov, Evelin, Milaneschi, Yuri, Milani, Lili, Mondimore, Francis M., Montgomery, Grant W., Mostafavi, Sara, Mullins, Niamh, Nauck, Matthias, Ng, Bernard, Nivard, Michel G., Nyholt, Dale R., O'Reilly, Paul F., Oskarsson, Hogni, Hayward, Caroline, Heath, Andrew C., Kendler, Kenneth S., Kloiber, Stefan, Lewis, Glyn, Li, Qingqin S., Lucae, Susanne, Madden, Pamela A. F., Magnusson, Patrik K., Martin, Nicholas G., McIntosh, Andrew M., Metspalu, Andres, Mors, Ole, Mortensen, Preben Bo, Müller-Myhsok, Bertram, Nordentoft, Merete, O'Donovan, Michael C., Paciga, Sara A., Pedersen, Nancy L., Owen, Michael J., Painter, Jodie N., Pedersen, Carsten Bøcker, Pedersen, Marianne Giørtz, Peterson, Roseann E., Peyrot, Wouter J., Pistis, Giorgio, Posthuma, Danielle, Quiroz, Jorge A., Qvist, Per, Rice, John P., Riley, Brien P., Rivera, Margarita, Mirza, Saira Saeed, Schoevers, Robert, Schulte, Eva C., Shen, Ling, Shi, Jianxin, Shyn, Stanley I., Sigurdsson, Engilbert, Sinnamon, Grant C. B., Smit, Johannes H., Smith, Daniel J., Stefansson, Hreinn, Steinberg, Stacy, Streit, Fabian, Strohmaier, Jana, Tansey, Katherine E., Teismann, Henning, Teumer, Alexander, Thompson, Wesley, Thomson, Pippa A., Thorgeirsson, Thorgeir E., Traylor, Matthew, Treutlein, Jens, Trubetskoy, Vassily, Uitterlinden, André G., Umbricht, Daniel, Van der Auwera, Sandra, van Hemert, Albert M., Viktorin, Alexander, Visscher, Peter M., Wang, Yunpeng, Webb, Bradley T., Penninx, Brenda W. J. H., Perlis, Roy H., Porteous, David J., Potash, James B., Preisig, Martin, Schaefer, Catherine, Schulze, Thomas G., Smoller, Jordan W., Stefansson, Kari, Tiemeier, Henning, Uher, Rudolf, Völzke, Henry, Weissman, Myrna M., Werge, Thomas, Lewis, Cathryn M., Levinson, Douglas F., Breen, Gerome, Børglum, Anders D., Sullivan, Patrick F., O'Connell, Kevin S., Coombes, Brandon, Qiao, Zhen, Als, Thomas D., Børte, Sigrid, Charney, Alexander W., Drange, Ole Kristian, Gandal, Michael J., Hagenaars, Saskia P., Ikeda, Masashi, Kamitaki, Nolan, Kim, Minsoo, Krebs, Kristi, Panagiotaropoulou, Georgia, Schilder, Brian M., Sloofman, Laura G., Winsvold, Bendik S., Won, Hong-Hee, Abramova, Liliya, Adorjan, Kristina, Al Eissa, Mariam, Albani, Diego, Alliey-Rodriguez, Ney, Anjorin, Adebayo, Antilla, Verneri, Antoniou, Anastasia, Awasthi, Swapnil, Baek, Ji Hyun, Bass, Nicholas, Bauer, Michael, Beins, Eva C., Bergen, Sarah E., Birner, Armin, Bøen, Erlend, Boks, Marco P., Bosch, Rosa, Brum, Murielle, Brumpton, Ben M., Brunkhorst-Kanaan, Nathalie, Budde, Monika, Byerley, William, Cairns, Murray, Casas, Miquel, Cervantes, Pablo, Cruceanu, Cristiana, Cuellar-Barboza, Alfredo, Cunningham, Julie, Curtis, David, Czerski, Piotr M., Dale, Anders M., Dalkner, Nina, David, Friederike S., Djurovic, Srdjan, Dobbyn, Amanda L., Douzenis, Athanassios, Elvsåshagen, Torbjørn, Ferrier, I. Nicol, Fiorentino, Alessia, Foroud, Tatiana M., Forty, Liz, Frei, Oleksandr, Freimer, Nelson B., Frisén, Louise, Gade, Katrin, Garnham, Julie, Gelernter, Joel, Gizer, Ian R., Gordon-Smith, Katherine, Greenwood, Tiffany A., Guzman-Parra, José, Ha, Kyooseob, Haraldsson, Magnus, Hautzinger, Martin, Heilbronner, Urs, Hellgren, Dennis, Holmans, Peter A., Huckins, Laura, Jamain, Stéphane, Johnson, Jessica S., Kalman, Janos L., Kamatani, Yoichiro, Kennedy, James L., Kittel-Schneider, Sarah, Kogevinas, Manolis, Koromina, Maria, Kranz, Thorsten M., Kranzler, Henry R., Kubo, Michiaki, Kupka, Ralph, Kushner, Steven A., Lavebratt, Catharina, Lawrence, Jacob, Leber, Markus, Lee, Heon-Jeong, Lee, Phil H., Levy, Shawn E., Lewis, Catrin, Liao, Calwing, Lundberg, Martin, Magnusson, Sigurdur H., Maihofer, Adam, Malaspina, Dolores, Maratou, Eirini, Martinsson, Lina, McGregor, Nathaniel W., McKay, James D., Medeiros, Helena, Millischer, Vincent, Moran, Jennifer L., Morris, Derek W., Mühleisen, Thomas W., O'Brien, Niamh, O'Donovan, Claire, Olde Loohuis, Loes M., Oruc, Lilijana, Papiol, Sergi, Pardiñas, Antonio F., Perry, Amy, Pfennig, Andrea, Porichi, Evgenia, Quested, Digby, Raj, Towfique, Rapaport, Mark H., Regeer, Eline J., Rivas, Fabio, Roth, Julian, Roussos, Panos, Ruderfer, Douglas M., Sánchez-Mora, Cristina, Senner, Fanny, Sharp, Sally, Shilling, Paul D., Sirignano, Lea, Slaney, Claire, Smeland, Olav B., Sobell, Janet L., Artigas, Maria Soler, Spijker, Anne T., Stein, Dan J., Strauss, John S., Świątkowska, Beata, Terao, Chikashi, Toma, Claudio, Tooney, Paul, Tsermpini, Evangelia-Eirini, Vawter, Marquis P., Vedder, Helmut, Walters, James T. R., Xi, Simon, Xu, Wei, Kay Yang, Jessica Mei, Young, Allan H., Young, Hannah, Zandi, Peter P., Zhou, Hang, Zillich, Lea, Adolfsson, Rolf, Agartz, Ingrid, Alda, Martin, Alfredsson, Lars, Babadjanova, Gulja, Backlund, Lena, Bellivier, Frank, Bengesser, Susanne, Berrettini, Wade H., Blackwood, Douglas H. R., Boehnke, Michael, Carr, Vaughan J., Catts, Stanley, Corvin, Aiden, Craddock, Nicholas, Dikeos, Dimitris, Etain, Bruno, Ferentinos, Panagiotis, Frye, Mark, Fullerton, Janice M., Gawlik, Micha, Gershon, Elliot S., Green, Melissa J., Grigoroiu-Serbanescu, Maria, Hauser, Joanna, Henskens, Frans, Hillert, Jan, Hong, Kyung Sue, Hultman, Christina M., Hveem, Kristian, Iwata, Nakao, Jablensky, Assen V., Kahn, René S., Kelsoe, John R., Kirov, George, Landén, Mikael, Leboyer, Marion, Lissowska, Jolanta, Lochner, Christine, Loughland, Carmel, Mathews, Carol A., Mayoral, Fermin, McElroy, Susan L., McMahon, Francis J., Melle, Ingrid, Michie, Patricia, Mitchell, Philip B., Morken, Gunnar, Mowry, Bryan, Myers, Richard M., Neale, Benjamin M., Nievergelt, Caroline M., Oedegaard, Ketil J., Olsson, Tomas, Pantelis, Chris, Pato, Carlos, Pato, Michele T., Patrinos, George P., Ramos-Quiroga, Josep Antoni, Reif, Andreas, Reininghaus, Eva Z., Ribasés, Marta, Rouleau, Guy A., Saito, Takeo, Schall, Ulrich, Schalling, Martin, Schofield, Peter R., Scott, Laura J., Scott, Rodney J., Serretti, Alessandro, Weickert, Cynthia Shannon, Stordal, Eystein, Turecki, Gustavo, Vaaler, Arne E., Vieta, Eduard, Vincent, John B., Waldman, Irwin D., Weickert, Thomas W., Zwart, John-Anker, Biernacka, Joanna M., Nurnberger, John I., Edenberg, Howard J., Stahl, Eli A., McQuillin, Andrew, Di Florio, Arianna, Ophoff, Roel A., Andreassen, Ole A., Adan, Roger A. H., Ando, Tetsuya, Aschauer, Harald, Baker, Jessica H., Bencko, Vladimir, Bergen, Andrew W., Birgegård, Andreas, Boden, Joseph M., Boehm, Ilka, Boni, Claudette, Perica, Vesna Boraska, Brandt, Harry, Buehren, Katharina, Bulik, Cynthia M., Burghardt, Roland, Carlberg, Laura, Cassina, Matteo, Clementi, Maurizio, Cone, Roger D., Courtet, Philippe, Crawford, Steven, Crow, Scott, Crowley, James J., Danner, Unna N., Davis, Oliver S. P., de Zwaan, Martina, Dedoussis, George, Degortes, Daniela, DeSocio, Janiece E., Dick, Danielle M., Dina, Christian, Dmitrzak-Weglarz, Monika, Martinez, Elisa Docampo, Duncan, Laramie E., Egberts, Karin, Marshall, Christian R., Mattingsdal, Morten, McDevitt, Sara, Meulenbelt, Ingrid, Micali, Nadia, Mitchell, James, Mitchell, Karen, Monteleone, Palmiero, Monteleone, Alessio Maria, Munn-Chernoff, Melissa A., Nacmias, Benedetta, Navratilova, Marie, Ntalla, Ioanna, Olsen, Catherine M., O'Toole, Julie K., Padyukov, Leonid, Palotie, Aarno, Pantel, Jacques, Papezova, Hana, Parker, Richard, Pearson, John F., Ehrlich, Stefan, Escaramís, Geòrgia, Espeseth, Thomas, Estivill, Xavier, Farmer, Anne, Favaro, Angela, Fernández-Aranda, Fernando, Fichter, Manfred M., Fischer, Krista, Floyd, James A. B., Föcker, Manuel, Foretova, Lenka, Forzan, Monica, Franklin, Christopher S., Gallinger, Steven, Gambaro, Giovanni, Giegling, Ina, Giuranna, Johanna, Giusti-Rodríquez, Paola, Gonidakis, Fragiskos, Gordon, Scott, Gorwood, Philip, Mayora, Monica Gratacos, Guillaume, Sébastien, Guo, Yiran, Hakonarson, Hakon, Halmi, Katherine A., Hanscombe, Ken B., Hatzikotoulas, Konstantinos, Hebebrand, Johannes, Helder, Sietske G., Henders, Anjali K., Herpertz-Dahlmann, Beate, Herzog, Wolfgang, Hinney, Anke, Horwood, L. John, Hübel, Christopher, Petersen, Liselotte V., Pinto, Dalila, Purves, Kirstin L., Raevuori, Anu, Ramoz, Nicolas, Reichborn-Kjennerud, Ted, Ricca, Valdo, Ripatti, Samuli, Ritschel, Franziska, Roberts, Marion, Rybakowski, Filip, Santonastaso, Paolo, Scherag, André, Scherer, Stephen W., Schmidt, Ulrike, Schork, Nicholas J., Schosser, Alexandra, Seitz, Jochen, Slachtova, Lenka, Slagboom, P. Eline, Slof-Op 't Landt, Margarita C. T., Slopien, Agnieszka, Soranzo, Nicole, Sorbi, Sandro, Southam, Lorraine, Steen, Vidar W., Strober, Michael, Huckins, Laura M., Hudson, James I., Imgart, Hartmut, Inoko, Hidetoshi, Janout, Vladimir, Jiménez-Murcia, Susana, Johnson, Craig, Jordan, Jennifer, Julià, Antonio, Kalsi, Gursharan, Kaminská, Deborah, Kaplan, Allan S., Kaprio, Jaakko, Karhunen, Leila, Karwautz, Andreas, Kas, Martien J. H., Kaye, Walter H., Kennedy, Martin A., Keski-Rahkonen, Anna, Kiezebrink, Kirsty, Kim, Youl-Ri, Kirk, Katherine M., Klareskog, Lars, Klump, Kelly L., Knudsen, Gun Peggy S., Larsen, Janne T., Le Hellard, Stephanie, Leppä, Virpi M., Li, Dong, Lichtenstein, Paul, Lilenfeld, Lisa, Lin, Bochao Danae, Lundervold, Astri, Luykx, Jurjen, Magistretti, Pierre J., Maj, Mario, Mannik, Katrin, Marsal, Sara, Stuber, Garret D., Szatkiewicz, Jin P., Tachmazidou, Ioanna, Tenconi, Elena, Thornton, Laura M., Tortorella, Alfonso, Tozzi, Federica, Treasure, Janet, Tsitsika, Artemis, Tyszkiewicz-Nwafor, Marta, Tziouvas, Konstantinos, van Elburg, Annemarie A., van Furth, Eric F., Wade, Tracey D., Wagner, Gudrun, Walton, Esther, Watson, Hunna J., Whiteman, David C., Wichmann, H. Erich, Widen, Elisabeth, Woodside, D. Blake, Yao, Shuyang, Yilmaz, Zeynep, Zeggini, Eleftheria, Zerwas, Stephanie, Zipfel, Stephan, Jungkunz, Martin, Mullins, N., Kang, J., Campos, A. I., Coleman, J. R. I., Edwards, A. C., Galfalvy, H., Levey, D. F., Lori, A., Shabalin, A., Starnawska, A., Su, M. -H., Watson, H. J., Adams, M., Awasthi, S., Gandal, M., Hafferty, J. D., Hishimoto, A., Kim, M., Okazaki, S., Otsuka, I., Ripke, S., Ware, E. B., Bergen, A. W., Berrettini, W. H., Bohus, M., Brandt, H., Chang, X., Chen, W. J., Chen, H. -C., Crawford, S., Crow, S., Diblasi, E., Duriez, P., Fernandez-Aranda, F., Fichter, M. M., Gallinger, S., Glatt, S. J., Gorwood, P., Guo, Y., Hakonarson, H., Halmi, K. A., Hwu, H. -G., Jain, S., Jamain, S., Jimenez-Murcia, S., Johnson, C., Kaplan, A. S., Kaye, W. H., Keel, P. K., Kennedy, J. L., Klump, K. L., Li, D., Liao, S. -C., Lieb, K., Lilenfeld, L., Liu, C. -M., Magistretti, P. J., Marshall, C. R., Mitchell, J. E., Monson, E. T., Myers, R. M., Pinto, D., Powers, A., Ramoz, N., Roepke, S., Rozanov, V., Scherer, S. W., Schmahl, C., Sokolowski, M., Strober, M., Thornton, L. M., Treasure, J., Tsuang, M. T., Witt, S. H., Woodside, D. B., Yilmaz, Z., Zillich, L., Adolfsson, R., Agartz, I., Air, T. M., Alda, M., Alfredsson, L., Andreassen, O. A., Anjorin, A., Appadurai, V., Soler Artigas, M., Van der Auwera, S., Azevedo, M. H., Bass, N., Bau, C. H. D., Baune, B. T., Bellivier, F., Berger, K., Biernacka, J. M., Bigdeli, T. B., Binder, E. B., Boehnke, M., Boks, M. P., Bosch, R., Braff, D. L., Bryant, R., Budde, M., Byrne, E. M., Cahn, W., Casas, M., Castelao, E., Cervilla, J. A., Chaumette, B., Cichon, S., Corvin, A., Craddock, N., Craig, D., Degenhardt, F., Djurovic, S., Edenberg, H. J., Fanous, A. H., Foo, J. C., Forstner, A. J., Frye, M., Fullerton, J. M., Gatt, J. M., Gejman, P. V., Giegling, I., Grabe, H. J., Green, M. J., Grevet, E. H., Grigoroiu-Serbanescu, M., Gutierrez, B., Guzman-Parra, J., Hamilton, S. P., Hamshere, M. L., Hartmann, A., Hauser, J., Heilmann-Heimbach, S., Hoffmann, P., Ising, M., Jones, I., Jones, L. A., Jonsson, L., Kahn, R. S., Kelsoe, J. R., Kendler, K. S., Kloiber, S., Koenen, K. C., Kogevinas, M., Konte, B., Krebs, M. -O., Landen, M., Lawrence, J., Leboyer, M., Lee, P. H., Levinson, D. F., Liao, C., Lissowska, J., Lucae, S., Mayoral, F., Mcelroy, S. L., Mcgrath, P., Mcguffin, P., Mcquillin, A., Medland, S. E., Mehta, D., Melle, I., Milaneschi, Y., Mitchell, P. B., Molina, E., Morken, G., Mortensen, P. B., Muller-Myhsok, B., Nievergelt, C., Nimgaonkar, V., Nothen, M. M., O'Donovan, M. C., Ophoff, R. A., Owen, M. J., Pato, C., Pato, M. T., Penninx, B. W. J. H., Pimm, J., Pistis, G., Potash, J. B., Power, R. A., Preisig, M., Quested, D., Ramos-Quiroga, J. A., Reif, A., Ribases, M., Richarte, V., Rietschel, M., Rivera, M., Roberts, A., Roberts, G., Rouleau, G. A., Rovaris, D. L., Rujescu, D., Sanchez-Mora, C., Sanders, A. R., Schofield, P. R., Schulze, T. G., Scott, L. J., Serretti, A., Shi, J., Shyn, S. I., Sirignano, L., Sklar, P., Smeland, O. B., Smoller, J. W., Sonuga-Barke, E. J. S., Spalletta, G., Strauss, J. S., Swiatkowska, B., Trzaskowski, M., Turecki, G., Vilar-Ribo, L., Vincent, J. B., Volzke, H., Walters, J. T. R., Shannon Weickert, C., Weickert, T. W., Weissman, M. M., Williams, L. M., Wray, N. R., Zai, C. C., Ashley-Koch, A. E., Beckham, J. C., Hauser, E. R., Hauser, M. A., Kimbrel, N. A., Lindquist, J. H., Mcmahon, B., Oslin, D. W., Qin, X., Mattheisen, M., Abdellaoui, A., Adams, M. J., Agerbo, E., Andlauer, T. F. M., Bacanu, S. -A., Baekvad-Hansen, M., Beekman, A. T. F., Bryois, J., Buttenschon, H. N., Bybjerg-Grauholm, J., Cai, N., Christensen, J. H., Clarke, T. -K., Colodro-Conde, L., Couvy-Duchesne, B., Crawford, G. E., Davies, G., Derks, E. M., Direk, N., Dolan, C. V., Dunn, E. C., Eley, T. C., Escott-Price, V., Hassan Kiadeh, F. F., Finucane, H. K., Frank, J., Gaspar, H. A., Gill, M., Goes, F. S., Gordon, S. D., Weinsheimer, S. M., Wellmann, J., Willemsen, G., Wu, Y., Xi, H. S., Yang, J., Zhang, F., Arolt, V., Boomsma, D. I., Dannlowski, U., Depaulo, J. 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A., Keski-Rahkonen, A., Kiezebrink, K., Kim, Y. -R., Kirk, K. M., Klareskog, L., Knudsen, G. P. S., Larsen, J. T., Le Hellard, S., Leppa, V. M., Lichtenstein, P., Lin, B. D., Lundervold, A., Luykx, J., Maj, M., Mannik, K., Marsal, S., Stuber, G. D., Szatkiewicz, J. P., Tachmazidou, I., Tenconi, E., Tortorella, A., Tozzi, F., Tsitsika, A., Tyszkiewicz-Nwafor, M., Tziouvas, K., van Elburg, A. A., van Furth, E. F., Wade, T. D., Wagner, G., Walton, E., Whiteman, D. C., Wichmann, H. E., Widen, E., Yao, S., Zeggini, E., Zerwas, S., Zipfel, S., Jungkunz, M., Dietl, L., Schwarze, C. E., Dahmen, N., Schott, B. H., Mobascher, A., Crivelli, S., Dennis, M. F., Harvey, P. D., Carter, B. W., Huffman, J. E., Jacobson, D., Madduri, R., Olsen, M. K., Pestian, J., Gaziano, J. M., Muralidhar, S., Ramoni, R., Beckham, J., Chang, K. -M., O'Donnell, C. J., Tsao, P. S., Breeling, J., Huang, G., Romero, J. P. C., Moser, J., Whitbourne, S. B., Brewer, J. V., Aslan, M., Connor, T., Argyres, D. P., Stephens, B., Brophy, M. T., Humphries, D. E., Selva, L. E., Do, N., Shayan, S., Cho, K., Pyarajan, S., Hauser, E., Sun, Y., Zhao, H., Wilson, P., Mcardle, R., Dellitalia, L., Mattocks, K., Harley, J., Zablocki, C. J., Whittle, J., Jacono, F., Gutierrez, S., Gibson, G., Hammer, K., Kaminsky, L., Villareal, G., Kinlay, S., Xu, J., Hamner, M., Mathew, R., Bhushan, S., Iruvanti, P., Godschalk, M., Ballas, Z., Ivins, D., Mastorides, S., Moorman, J., Gappy, S., Klein, J., Ratcliffe, N., Florez, H., Okusaga, O., Murdoch, M., Sriram, P., Yeh, S. S., Tandon, N., Jhala, D., Aguayo, S., Cohen, D., Sharma, S., Liangpunsakul, S., Oursler, K. A., Whooley, M., Ahuja, S., Constans, J., Meyer, P., Greco, J., Rauchman, M., Servatius, R., Gaddy, M., Wallbom, A., Morgan, T., Stapley, T., Sherman, S., Ross, G., Tsao, P., Strollo, P., Boyko, E., Meyer, L., Gupta, S., Huq, M., Fayad, J., Hung, A., Lichy, J., Hurley, R., Robey, B., Striker, R., Erlangsen, A., Kessler, R. C., Porteous, D., Ursano, R. J., Wasserman, D., Coon, H., Demontis, D., Docherty, A. R., Kuo, P. -H., Mann, J. J., Renteria, M. E., Stein, M. B., Willour, V., Psychiatry, Biological Psychology, APH - Methodology, APH - Mental Health, APH - Health Behaviors & Chronic Diseases, AMS - Sports, AMS - Ageing & Vitality, APH - Personalized Medicine, Amsterdam Neuroscience - Complex Trait Genetics, Complex Trait Genetics, Institute for Molecular Medicine Finland, Centre of Excellence in Complex Disease Genetics, Aarno Palotie / Principal Investigator, Genomics of Neurological and Neuropsychiatric Disorders, HUS Psychiatry, Department of Public Health, Clinicum, Nuorisopsykiatria, Faculty Common Matters (Faculty of Social Sciences), Samuli Olli Ripatti / Principal Investigator, Complex Disease Genetics, Biostatistics Helsinki, Anna Keski-Rahkonen / Principal Investigator, Elisabeth Ingrid Maria Widen / Principal Investigator, Genomic Discoveries and Clinical Translation, Internal medicine, Amsterdam Neuroscience - Mood, Anxiety, Psychosis, Stress & Sleep, APH - Digital Health, Mullins N., Kang J., Campos A.I., Coleman J.R.I., Edwards 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Maratou E., Martinsson L., McGregor N.W., McKay J.D., Medeiros H., Millischer V., Moran J.L., Morris D.W., Muhleisen T.W., O'Brien N., O'Donovan C., Olde Loohuis L.M., Oruc L., Papiol S., Pardinas A.F., Perry A., Pfennig A., Porichi E., Raj T., Rapaport M.H., Regeer E.J., Rivas F., Roth J., Roussos P., Ruderfer D.M., Senner F., Sharp S., Shilling P.D., Slaney C., Sobell J.L., Artigas M.S., Spijker A.T., Stein D.J., Terao C., Toma C., Tooney P., Tsermpini E.-E., Vawter M.P., Vedder H., Xi S., Xu W., Kay Yang J.M., Young A.H., Young H., Zandi P.P., Zhou H., HUNT All-In Psychiatry, Babadjanova G., Backlund L., Bengesser S., Blackwood D.H.R., Carr V.J., Catts S., Dikeos D., Etain B., Ferentinos P., Gawlik M., Gershon E.S., Henskens F., Hillert J., Hong K.S., Hultman C.M., Hveem K., Iwata N., Jablensky A.V., Kirov G., Lochner C., Loughland C., Mathews C.A., McMahon F.J., Michie P., Mowry B., Neale B.M., Nievergelt C.M., Oedegaard K.J., Olsson T., Pantelis C., Patrinos G.P., Reininghaus E.Z., Saito T., Schall U., Schalling M., Scott R.J., Weickert C.S., Stordal E., Vaaler A.E., Vieta E., Waldman I.D., Zwart J.-A., Nurnberger J.I., Stahl E.A., Di Florio A., Adan R.A.H., Ando T., Aschauer H., Baker J.H., Bencko V., Birgegard A., Boden J.M., Boehm I., Boni C., Perica V.B., Buehren K., Bulik C.M., Burghardt R., Carlberg L., Cassina M., Clementi M., Cone R.D., Courtet P., Crowley J.J., Danner U.N., Davis O.S.P., de Zwaan M., Dedoussis G., Degortes D., DeSocio J.E., Dick D.M., Dina C., Dmitrzak-Weglarz M., Martinez E.D., Duncan L.E., Egberts K., Mattingsdal M., McDevitt S., Meulenbelt I., Micali N., Mitchell J., Mitchell K., Monteleone P., Monteleone A.M., Munn-Chernoff M.A., Nacmias B., Navratilova M., Ntalla I., Olsen C.M., O'Toole J.K., Padyukov L., Palotie A., Pantel J., Papezova H., Parker R., Pearson J.F., Ehrlich S., Escaramis G., Espeseth T., Estivill X., Farmer A., Favaro A., Fischer K., Floyd J.A.B., Focker M., Foretova L., Forzan M., Franklin C.S., Gambaro G., Giuranna J., Giusti-Rodriquez P., Gonidakis F., Gordon S., Mayora M.G., Guillaume S., Hanscombe K.B., Hatzikotoulas K., Hebebrand J., Helder S.G., Henders A.K., Herpertz-Dahlmann B., Herzog W., Hinney A., Horwood L.J., Hubel C., Petersen L.V., Purves K.L., Raevuori A., Reichborn-Kjennerud T., Ricca V., Ripatti S., Ritschel F., Roberts M., Rybakowski F., Santonastaso P., Scherag A., Schmidt U., Schork N.J., Schosser A., Seitz J., Slachtova L., Slagboom P.E., Slof-Op 't Landt M.C.T., Slopien A., Soranzo N., Sorbi S., Southam L., Steen V.W., Huckins L.M., Hudson J.I., Imgart H., Inoko H., Janout V., Jordan J., Julia A., Kalsi G., Kaminska D., Kaprio J., Karhunen L., Karwautz A., Kas M.J.H., Kennedy M.A., Keski-Rahkonen A., Kiezebrink K., Kim Y.-R., Kirk K.M., Klareskog L., Knudsen G.P.S., Larsen J.T., Le Hellard S., Leppa V.M., Lichtenstein P., Lin B.D., Lundervold A., Luykx J., Maj M., Mannik K., Marsal S., Stuber G.D., Szatkiewicz J.P., Tachmazidou I., Tenconi E., Tortorella A., Tozzi F., Tsitsika A., Tyszkiewicz-Nwafor M., Tziouvas K., van Elburg A.A., van Furth E.F., Wade T.D., Wagner G., Walton E., Whiteman D.C., Wichmann H.E., Widen E., Yao S., Zeggini E., Zerwas S., Zipfel S., Jungkunz M., Dietl L., Schwarze C.E., Dahmen N., Schott B.H., Mobascher A., Crivelli S., Dennis M.F., Harvey P.D., Carter B.W., Huffman J.E., Jacobson D., Madduri R., Olsen M.K., Pestian J., Gaziano J.M., Muralidhar S., Ramoni R., Beckham J., Chang K.-M., O'Donnell C.J., Tsao P.S., Breeling J., Huang G., Romero J.P.C., Moser J., Whitbourne S.B., Brewer J.V., Aslan M., Connor T., Argyres D.P., Stephens B., Brophy M.T., Humphries D.E., Selva L.E., Do N., Shayan S., Cho K., Pyarajan S., Hauser E., Sun Y., Zhao H., Wilson P., McArdle R., Dellitalia L., Mattocks K., Harley J., Zablocki C.J., Whittle J., Jacono F., Gutierrez S., Gibson G., Hammer K., Kaminsky L., Villareal G., Kinlay S., Xu J., Hamner M., Mathew R., Bhushan S., Iruvanti P., Godschalk M., Ballas Z., Ivins D., Mastorides S., Moorman J., Gappy S., Klein J., Ratcliffe N., Florez H., Okusaga O., Murdoch M., Sriram P., Yeh S.S., Tandon N., Jhala D., Aguayo S., Cohen D., Sharma S., Liangpunsakul S., Oursler K.A., Whooley M., Ahuja S., Constans J., Meyer P., Greco J., Rauchman M., Servatius R., Gaddy M., Wallbom A., Morgan T., Stapley T., Sherman S., Ross G., Tsao P., Strollo P., Boyko E., Meyer L., Gupta S., Huq M., Fayad J., Hung A., Lichy J., Hurley R., Robey B., Striker R., Erlangsen A., Kessler R.C., Porteous D., Ursano R.J., Wasserman D., Coon H., Demontis D., Docherty A.R., Kuo P.-H., Mann J.J., Renteria M.E., Stein M.B., and Willour V.

Subjects
LD SCORE REGRESSION, Genome-wide association study, Suicide, Attempted, 3124 Neurology and psychiatry, 0302 clinical medicine, Risk Factors, Insomnia, Suicide attempt, GWAS, Suïcidi, Depression (differential diagnoses), Cause of death, Psychiatry, 0303 health sciences, Factors de risc en les malalties, Mental Disorders, Genetic Correlation, Genome-wide Association Study, Pleiotropy, Polygenicity, Suicide, Suicide Attempt, DEPRESSION, 3. Good health, Genetic correlation, Genome-Wide Association Study, Humans, Polymorphism, Single Nucleotide, Depressive Disorder, Major, Mental illness, Cohort, SEX, medicine.symptom, Human, medicine.medical_specialty, Risk factors in diseases, BF, Locus (genetics), BEHAVIORS, Psykiatri, EVENTS, 03 medical and health sciences, SDG 3 - Good Health and Well-being, medicine, ddc:610, GENOME-WIDE ASSOCIATION, IDEATION, Socioeconomic status, METAANALYSIS, Biological Psychiatry, 030304 developmental biology, business.industry, Risk Factor, Genetic architecture, THOUGHTS, RC0321, business, Malalties mentals, 030217 neurology & neurosurgery
Abstract

Statistical analyses were carried out on the NL Genetic Cluster Computer (http://www.geneticcluster.org) hosted by SURFsara and the Mount Sinai high performance computing cluster (http://hpc.mssm.edu), which is supported by the Office of Research Infrastructure of the National Institutes of Health (Grant Nos. S10OD018522 and S10OD026880). This work was conducted in part using the resources of the Advanced Computing Center for Research and Education at Vanderbilt University, Nashville, TN. This work was funded by the National Institutes of Health (Grant Nos. R01MH116269 and R01MH121455 [to DMR]), NIGMS of the National Institutes of Health (Grant No. T32GM007347 [to JK]), and the Brain & Behavior Research Foundation (NARSAD Young Investigator Award No. 29551 [to NM])., BACKGROUND: Suicide is a leading cause of death worldwide, and nonfatal suicide attempts, which occur far more frequently, are a major source of disability and social and economic burden. Both have substantial genetic etiology, which is partially shared and partially distinct from that of related psychiatric disorders. METHODS: We conducted a genome-wide association study (GWAS) of 29,782 suicide attempt (SA) cases and 519,961 controls in the International Suicide Genetics Consortium (ISGC). The GWAS of SA was conditioned on psychiatric disorders using GWAS summary statistics via multitrait-based conditional and joint analysis, to remove genetic effects on SA mediated by psychiatric disorders. We investigated the shared and divergent genetic architectures of SA, psychiatric disorders, and other known risk factors. RESULTS: Two loci reached genome-wide significance for SA: the major histocompatibility complex and an intergenic locus on chromosome 7, the latter of which remained associated with SA after conditioning on psychiatric disorders and replicated in an independent cohort from the Million Veteran Program. This locus has been implicated in risk-taking behavior, smoking, and insomnia. SA showed strong genetic correlation with psychiatric disorders, particularly major depression, and also with smoking, pain, risk-taking behavior, sleep disturbances, lower educational attainment, reproductive traits, lower socioeconomic status, and poorer general health. After conditioning on psychiatric disorders, the genetic correlations between SA and psychiatric disorders decreased, whereas those with nonpsychiatric traits remained largely unchanged. CONCLUSIONS: Our results identify a risk locus that contributes more strongly to SA than other phenotypes and suggest a shared underlying biology between SA and known risk factors that is not mediated by psychiatric disorders., Office of Research Infrastructure of the National Institutes of Health S10OD018522 S10OD026880, United States Department of Health & Human Services, National Institutes of Health (NIH) - USA R01MH116269 R01MH121455, NIH National Institute of General Medical Sciences (NIGMS) T32GM007347 NARSAD 29551

Published
2022

9. Prevalence of neurocognitive and perceived speech deficits in patients with head and neck cancer before treatment: Associations with demographic, behavioral, and disease-related factors

Author

Chris H.J. Terhaard, R. Leemans, Robert J. Baatenburg de Jong, Roy P. C. Kessels, Robert P. Takes, Kristoffer Dahlslätt, Irma M. Verdonck-de Leeuw, Johannes H. Smit, Vitória Piai, Johannes A. Langendijk, Femke Jansen, Judith B. Prins, Guided Treatment in Optimal Selected Cancer Patients (GUTS), Damage and Repair in Cancer Development and Cancer Treatment (DARE), Otorhinolaryngology and Head and Neck Surgery, Otolaryngology / Head & Neck Surgery, CCA - Cancer Treatment and quality of life, APH - Mental Health, APH - Personalized Medicine, CCA - Cancer biology and immunology, Psychiatry, APH - Methodology, Amsterdam Neuroscience - Complex Trait Genetics, and Amsterdam Neuroscience - Mood, Anxiety, Psychosis, Stress & Sleep

Subjects
Larynx, Pediatrics, medicine.medical_specialty, Disease, Cohort Studies, All institutes and research themes of the Radboud University Medical Center, Quality of life, SDG 3 - Good Health and Well-being, medicine, Prevalence, otorhinolaryngologic diseases, Humans, Speech, Prospective Studies, Prospective cohort study, Neurodevelopmental disorders Donders Center for Medical Neuroscience [Radboudumc 7], Neuro- en revalidatiepsychologie, business.industry, Head and neck cancer, Neuropsychology and rehabilitation psychology, Cognition, medicine.disease, Women's cancers Radboud Institute for Health Sciences [Radboudumc 17], medicine.anatomical_structure, Cross-Sectional Studies, Otorhinolaryngology, Head and Neck Neoplasms, Quality of Life, business, Neurocognitive, Cohort study, Rare cancers Radboud Institute for Health Sciences [Radboudumc 9]
Abstract

Contains fulltext : 240301.pdf (Publisher’s version ) (Open Access) Background: Neurocognition and speech, relevant domains in head and neck cancer (HNC), may be affected pretreatment. However, the prevalence of pretreatment deficits and their possible concurrent predictors are poorly understood. Methods: Using an HNC prospective cohort (Netherlands Quality of Life and Biomedical Cohort Study, N >= 444) with a cross-sectional design, we investigated the estimated prevalence of pretreatment deficits and their relationship with selected demographic, behavioral, and disease-related factors. Results: Using objective assessments, rates of moderate-to-severe neurocognitive deficit ranged between 4% and 8%. From patient-reported outcomes, 6.5% of patients reported high levels of cognitive failures and 46.1% reported speech deficits. Patient-reported speech functioning was worse in larynx compared to other subsites. Other nonspeech outcomes were unrelated to any variable. Patient-reported neurocognitive and speech functioning were modestly correlated, especially in the larynx group. Conclusions: These findings indicate that a subgroup of patients with HNC shows pretreatment deficits, possibly accentuated in the case of larynx tumors. 13 p.

Published
2022

10. Molecular and Mechanical Cues for Somite Periodicity

Author

Marta Linde-Medina and Theodoor H. Smit

Subjects
Nervous system, vertebral column, Strain (chemistry), QH301-705.5, scaling, differential strain, Embryo, Cell Biology, Review, Biology, Cell biology, Somite, Cell and Developmental Biology, medicine.anatomical_structure, somitogenesis, Somitogenesis, clock and wavefront, embryonic structures, medicine, Paraxial mesoderm, Segmentation, Biology (General), Vertebral column, Developmental Biology
Abstract

Somitogenesis refers to the segmentation of the paraxial mesoderm, a tissue located on the back of the embryo, into regularly spaced and sized pieces, i.e., the somites. This periodicity is important to assure, for example, the formation of a functional vertebral column and nervous system. Prevailing models of somitogenesis are based on the existence of a genetic regulatory network capable of generating a striped pattern of gene expression, which is subsequently translated into periodic tissue boundaries. An alternative view is that the pre-pattern that guides somitogenesis is not chemical, but of a mechanical origin. A striped pattern of mechanical strain can be formed in physically connected tissues expanding at different rates, as it occurs in the embryo. Here we argue that both molecular and mechanical cues could drive somite periodicity and suggest how they could be integrated.

Published
2021

11. Predicting unplanned hospital visits in older home care recipients: a cross-country external validation study

Author

Vjenka Garms-Homolová, Henriëtte G. van der Roest, Harriet Finne-Soveri, Jan H. Smit, Hein P.J. van Hout, Anja Declercq, Jet H. Klunder, Palmi V. Jonsson, Otto R. Maarsingh, Veronique Bordonis, Graziano Onder, Martijn W. Heymans, Karlijn J. Joling, General practice, Epidemiology and Data Science, APH - Methodology, APH - Personalized Medicine, Psychiatry, APH - Mental Health, Amsterdam Neuroscience - Complex Trait Genetics, Amsterdam Neuroscience - Mood, Anxiety, Psychosis, Stress & Sleep, Elderly care medicine, APH - Aging & Later Life, and APH - Digital Health

Subjects
Emergency department visits, Geriatrics & Gerontology, ASSESSMENT RISK SCREEN, EUROPE, IMPACT, Geographical validation, medicine.medical_treatment, Specific risk, Context (language use), Risk prediction models, Home care, Risk Factors, PEOPLE, COMMUNITY CARE, ADMISSIONS, Health care, Humans, Medicine, ELDERLY-PATIENTS, Aged, Aged, 80 and over, Science & Technology, Rehabilitation, Framingham Risk Score, Frailty, Receiver operating characteristic, business.industry, Research, RC952-954.6, Emergency department, ADVERSE HEALTH OUTCOMES, Home Care Services, Hospitals, MODEL, Geriatrics, Cohort, Unplanned hospitalizations, FRAILTY INDEX, Geriatrics and Gerontology, Emergency Service, Hospital, business, Life Sciences & Biomedicine, Gerontology, Demography
Abstract

Background Accurate identification of older persons at risk of unplanned hospital visits can facilitate preventive interventions. Several risk scores have been developed to identify older adults at risk of unplanned hospital visits. It is unclear whether risk scores developed in one country, perform as well in another. This study validates seven risk scores to predict unplanned hospital admissions and emergency department (ED) visits in older home care recipients from six countries. Methods We used the IBenC sample (n = 2446), a cohort of older home care recipients from six countries (Belgium, Finland, Germany, Iceland, Italy and The Netherlands) to validate four specific risk scores (DIVERT, CARS, EARLI and previous acute admissions) and three frailty indicators (CHESS, Fried Frailty Criteria and Frailty Index). Outcome measures were unplanned hospital admissions, ED visits or any unplanned hospital visits after 6 months. Missing data were handled by multiple imputation. Performance was determined by assessing calibration and discrimination (area under receiver operating characteristic curve (AUC)). Results Risk score performance varied across countries. In Iceland, for any unplanned hospital visits DIVERT and CARS reached a fair predictive value (AUC 0.74 [0.68–0.80] and AUC 0.74 [0.67–0.80]), respectively). In Finland, DIVERT had fair performance predicting ED visits (AUC 0.72 [0.67–0.77]) and any unplanned hospital visits (AUC 0.73 [0.67–0.77]). In other countries, AUCs did not exceed 0.70. Conclusions Geographical validation of risk scores predicting unplanned hospital visits in home care recipients showed substantial variations of poor to fair performance across countries. Unplanned hospital visits seem considerably dependent on healthcare context. Therefore, risk scores should be validated regionally before applied to practice. Future studies should focus on identification of more discriminative predictors in order to develop more accurate risk scores.

Published
2021

12. Interdisciplinary Perspectives on Restraint Use in Aged Care

Author

AD Price, Juanita Breen, Helen Courtney-Pratt, Katharine Salmon, Chloé C H Smit, Barbara C. Wimmer, Lynette R. Goldberg, and Katherine Lawler

Subjects
Restraint, Physical, Attitude of Health Personnel, Health, Toxicology and Mutagenesis, Legislation, Day care, Toxicology, Article, restrictive practice, Royal Commission, day care, community aged care, Chemical restraint, Nursing, residential aged care, Humans, chemical restraint, Qualitative Research, physical restraint, Aged, Government, Australia, Public Health, Environmental and Occupational Health, nursing_health_studies, Focus Groups, Focus group, nursing home, restraint, Medicine, psychotropic, long term aged care, Psychology, home care, Delivery of Health Care, Senior management, Qualitative research
Abstract

Restraint use in Australian residential aged care has been highlighted by the media, and investigated by researchers, government and advocacy bodies. In 2018, the Royal Commission into Aged Care selected ‘Restraint’ as a key focus of inquiry. Subsequently, Federal legislation was passed to ensure restraint is only used in residential aged care services as the ‘last resort’. To inform and develop Government educational resources, we conducted qualitative research to gain greater understanding of the experiences and attitudes of aged care stakeholders around restraint practice. Semi-structured interviews were held with 28 participants, comprising nurses, care staff, physicians, physiotherapists, pharmacists and relatives. Two focus groups were also conducted to ascertain the views of residential and community aged care senior management staff. Data were thematically analyzed using a pragmatic approach of inductive and deductive coding and theme development. Five themes were identified during the study: 1. Understanding of restraint, 2. Support for legislation, 3. Restraint-free environments are not possible, 4. Low-level restraint, 5. Restraint in the community is uncharted. Although most staff, health practitioners and relatives have a basic understanding of restraint, more education is needed at a conceptual level to enable them to identify and avoid restraint practice, particularly ‘low-level’ forms and chemical restraint. There was strong support for the new restraint regulations, but most interviewees admitted they were unsure what the legislation entailed. With regards to resources, stakeholders wanted recognition that there were times when restraint was necessary and advice on what to do in these situations, as opposed to unrealistic aspirations for restraint-free care. Stakeholders reported greater oversight of restraint in residential aged care but specified that community restraint use was largely unknown. Research is needed to investigate the extent and types of restraint practice in community aged care.

Published
2021

13. Associations between testosterone and patient reported sexual outcomes among male and female head and neck cancer patients before and six months after treatment: A pilot study

Author

Johannes H. Smit, Johannes A. Langendijk, Robert J. Baatenburg de Jong, Femke Jansen, Birgit I. Lissenberg-Witte, Heleen C. Melissant, Robert P. Takes, Chris H.J. Terhaard, C. René Leemans, Martin den Heijer, Ellen Laan, Irma M. Verdonck-de Leeuw, Otorhinolaryngology and Head and Neck Surgery, Clinical Psychology, APH - Mental Health, Guided Treatment in Optimal Selected Cancer Patients (GUTS), Damage and Repair in Cancer Development and Cancer Treatment (DARE), Obstetrics and Gynaecology, APH - Aging & Later Life, ARD - Amsterdam Reproduction and Development, Otolaryngology / Head & Neck Surgery, APH - Personalized Medicine, CCA - Cancer Treatment and quality of life, Epidemiology and Data Science, APH - Methodology, Internal medicine, Amsterdam Gastroenterology Endocrinology Metabolism, Psychiatry, Amsterdam Neuroscience - Complex Trait Genetics, and Amsterdam Neuroscience - Mood, Anxiety, Psychosis, Stress & Sleep

Subjects
Male, Cancer Research, medicine.medical_specialty, media_common.quotation_subject, Pilot Projects, Human sexuality, Orgasm, All institutes and research themes of the Radboud University Medical Center, SDG 3 - Good Health and Well-being, Surveys and Questionnaires, Internal medicine, medicine, Humans, Sex hormones, Testosterone, Patient Reported Outcome Measures, Head and neck cancer, media_common, business.industry, Outcome measures, Testosterone (patch), medicine.disease, Sexual Dysfunction, Physiological, Testosterone level, Oncology, Head and Neck Neoplasms, Female sexual function, Female, Oral Surgery, business, Sexual problems, Sexuality, After treatment, Supportive care, Rare cancers Radboud Institute for Health Sciences [Radboudumc 9]
Abstract

OBJECTIVES: To investigate associations between testosterone and patient reported sexual problems and need for sexual care in head and neck cancer patients at time of diagnosis and 6 months after treatment.PATIENTS AND METHODS: Data and samples were used of 40 patients (20 men, 20 women) before and 6 months after treatment. Outcome measures were total testosterone level (TT) and free testosterone index (FTI), testosterone insufficiency (TI), the EORTC QLQ-HN35 Sexuality subscale, the subscales of the International Index of Erectile Function (IIEF), Female Sexual Function Index (FSFI), and the Sexuality subscale of the Short-Form Supportive Care Needs Survey (SCNS-SF34).RESULTS: In men, higher FTI before treatment was significantly associated with better IIEF Orgasm (p = 0.020) and at 6 months follow-up with IIEF Desire (p = 0.019). Before treatment, insufficient testosterone was present in 5 males (25%) and in 3 at follow-up (15%) (2 patients who had TI before treatment plus one). In women, higher TT at follow-up was significantly associated with better EORTC Sexuality (p = 0.031) and FSFI Satisfaction (p = 0.020); FTI at follow-up was associated with FSFI Satisfaction (p = 0.012). Before treatment, TI was present in 2 women (10%) and in 3 (15%) at follow-up (the same 2 patients plus one).CONCLUSION: This pilot study showed that testosterone seems to be associated with patient reported sexual outcomes among male and female head and neck cancer patients. It is estimated that 10-25% of HNC patients may have testosterone insufficiency before treatment and/or at 6 months after treatment.

Published
2021

14. Micro-indentation and optical coherence tomography for the mechanical characterization of embryos: Experimental setup and measurements on chicken embryos

Author

Theo H. Smit, Marica Marrese, Nelda Antonovaite, Ben K.A. Nelemans, Davide Iannuzzi, Medical Biology, AMS - Restoration & Development, ARD - Amsterdam Reproduction and Development, AMS - Tissue Function & Regeneration, Biophotonics and Medical Imaging, LaserLaB - Biophotonics and Microscopy, and Amsterdam Neuroscience - Brain Imaging

Subjects
Chicken embryos, 0206 medical engineering, Biomedical Engineering, Embryonic Development, Mechanical properties, 02 engineering and technology, Chick Embryo, Biochemistry, Viscoelasticity, Biomaterials, Optical coherence tomography, Tissue engineering, Indentation, medicine, Animals, Molecular Biology, medicine.diagnostic_test, Resolution (electron density), General Medicine, Micro-indentation, 021001 nanoscience & nanotechnology, 020601 biomedical engineering, Characterization (materials science), Wide area, Micro indentation, 0210 nano-technology, Tomography, Optical Coherence, Biotechnology, Biomedical engineering
Abstract

The investigation of the mechanical properties of embryos is expected to provide valuable information on the phenomenology of morphogenesis. It is thus believed that, by mapping the viscoelastic features of an embryo at different stages of growth, it may be possible to shed light on the role of mechanics in embryonic development. To contribute to this field, we present a new instrument that can determine spatiotemporal distributions of mechanical properties of embryos over a wide area and with unprecedented accuracy. The method relies on combining ferrule-top micro-indentation, which provides local measurements of viscoelasticity, with Optical Coherence Tomography, which can reveal changes in tissue morphology and help the user identify the indentation point. To prove the working principle, we have collected viscoelasticity maps of fixed and live HH11-HH12 chicken embryos. Our study shows that the instrument can reveal correlations between tissue morphology and mechanical behavior. Statement of Significance: Local mechanical properties of soft biological tissue play a crucial role in several biological processes, including cell differentiation, cell migration, and body formation; therefore, measuring tissue properties at high resolution is of great interest in biology and tissue engineering. To provide an efficient method for the biomechanical characterization of soft biological tissues, we introduce a new tool in which the combination of non-invasive Optical Coherence Tomography imaging and depth-controlled indentation measurements allows one to map the viscoelastic properties of biological tissue and investigate correlations between local mechanical features and tissue morphology with unprecedented resolution.

Published
2019

15. Neighbourhood characteristics and prevalence and severity of depression

Author

Petra J. M. Elders, Johannes H. Smit, Gonneke Willemsen, Ron de Graaf, Brenda W.J.H. Penninx, Eric Koomen, Mariska Stam, Erik J. Timmermans, Jeroen Lakerveld, Mirjam Oosterman, Karien Stronks, Sophia E. Kramer, Celina E Henke, Ellen Generaal, Marieke B. Snijder, Emiel O. Hoogendijk, Martijn Huisman, Dorret I. Boomsma, Femke Rutters, Margreet ten Have, APH - Methodology, APH - Health Behaviors & Chronic Diseases, Public and occupational health, APH - Aging & Later Life, ACS - Heart failure & arrhythmias, APH - Mental Health, LEARN! - Social cognition and learning, Clinical Child and Family Studies, The Social Context of Aging (SoCA), Sociology, Spatial Economics, Amsterdam Neuroscience - Mood, Anxiety, Psychosis, Stress & Sleep, Biological Psychology, Psychiatry, Epidemiology and Data Science, Otolaryngology / Head & Neck Surgery, Pediatric surgery, APH - Societal Participation & Health, General practice, VU University medical center, Amsterdam Reproduction & Development (AR&D), APH - Quality of Care, APH - Digital Health, and ACS - Diabetes & metabolism

Subjects
Adult, Male, Netherlands Twin Register (NTR), Adolescent, Poison control, Social Environment, Suicide prevention, Occupational safety and health, 03 medical and health sciences, Young Adult, 0302 clinical medicine, cohort studies, Residence Characteristics, Injury prevention, Prevalence, Medicine, Humans, 030212 general & internal medicine, Socioeconomic status, Neighbourhood (mathematics), Netherlands, geographic information systems, Depressive Disorder, business.industry, Depression, Odds ratio, Middle Aged, SDG 11 - Sustainable Cities and Communities, 030227 psychiatry, Psychiatry and Mental health, Cross-Sectional Studies, Socioeconomic Factors, Papers, Regression Analysis, Female, Mental health, business, environment, neighbourhood, Demography, Cohort study
Abstract

BackgroundStudies on neighbourhood characteristics and depression show equivocal results.AimsThis large-scale pooled analysis examines whether urbanisation, socioeconomic, physical and social neighbourhood characteristics are associated with the prevalence and severity of depression.MethodCross-sectional design including data are from eight Dutch cohort studies (n= 32 487). Prevalence of depression, either DSM-IV diagnosis of depressive disorder or scoring for moderately severe depression on symptom scales, and continuous depression severity scores were analysed. Neighbourhood characteristics were linked using postal codes and included (a) urbanisation grade, (b) socioeconomic characteristics: socioeconomic status, home value, social security beneficiaries and non-Dutch ancestry, (c) physical characteristics: air pollution, traffic noise and availability of green space and water, and (d) social characteristics: social cohesion and safety. Multilevel regression analyses were adjusted for the individual's age, gender, educational level and income. Cohort-specific estimates were pooled using random-effects analysis.ResultsThe pooled analysis showed that higher urbanisation grade (odds ratio (OR) = 1.05, 95% CI 1.01–1.10), lower socioeconomic status (OR = 0.90, 95% CI 0.87–0.95), higher number of social security beneficiaries (OR = 1.12, 95% CI 1.06–1.19), higher percentage of non-Dutch residents (OR = 1.08, 95% CI 1.02–1.14), higher levels of air pollution (OR = 1.07, 95% CI 1.01–1.12), less green space (OR = 0.94, 95% CI 0.88–0.99) and less social safety (OR = 0.92, 95% CI 0.88–0.97) were associated with higher prevalence of depression. All four socioeconomic neighbourhood characteristics and social safety were also consistently associated with continuous depression severity scores.ConclusionsThis large-scale pooled analysis across eight Dutch cohort studies shows that urbanisation and various socioeconomic, physical and social neighbourhood characteristics are associated with depression, indicating that a wide range of environmental aspects may relate to poor mental health.Declaration of interestNone.

Published
2019

16. Longitudinal Association Between Depression and Inflammatory Markers

Author

Femke Lamers, Yuri Milaneschi, Robert A. Schoevers, Johannes H Smit, Gayle M. Wittenberg, Brenda W.J.H. Penninx, Psychiatry, APH - Mental Health, Amsterdam Neuroscience - Mood, Anxiety, Psychosis, Stress & Sleep, APH - Digital Health, APH - Methodology, Interdisciplinary Centre Psychopathology and Emotion regulation (ICPE), Perceptual and Cognitive Neuroscience (PCN), and Clinical Cognitive Neuropsychiatry Research Program (CCNP)

Subjects
0301 basic medicine, Adult, Male, medicine.medical_specialty, Longitudinal study, 03 medical and health sciences, 0302 clinical medicine, Internal medicine, Epidemiology, medicine, Humans, Longitudinal Studies, Generalized estimating equation, Biological Psychiatry, Depression (differential diagnoses), Netherlands, Inflammation, Depressive Disorder, business.industry, Interleukin-6, Odds ratio, Middle Aged, medicine.disease, Anxiety Disorders, Confidence interval, 030104 developmental biology, C-Reactive Protein, Cross-Sectional Studies, Major depressive disorder, Anxiety, Female, medicine.symptom, Inflammation Mediators, business, 030217 neurology & neurosurgery, Biomarkers
Abstract

Background: While cross-sectional associations of inflammatory markers interleukin-6 (IL-6) and C-reactive protein with major depressive disorder are well established, evidence for longitudinal associations mostly comes from studies on depression symptoms, not diagnoses. This study examined cross-sectional and bidirectional longitudinal associations between depression diagnosis and symptoms in an adult sample over a 6-year period. Methods: Data were obtained from the baseline (n = 2416) and 2- and 6-year follow-up assessments (n = 1925 and n = 1924, respectively) of the Netherlands Study of Depression and Anxiety. C-reactive protein and IL-6 were assessed at each wave, as were the Composite International Diagnostic Interview and Inventory of Depressive Symptomatology. Linear mixed models and generalized estimating equation models with a binomial distribution were used to study longitudinal associations between depression and inflammation and vice versa. Results: There was a consistent cross-sectional association between current depressive disorder (vs. no current disorder) and symptoms with IL-6 across all follow-up measurements (Cohen's d depression diagnosis = 0.06, p =.017; B standardized Inventory of Depressive Symptomatology = 0.029, SE = 0.011, p =.008). In longitudinal analyses, higher IL-6 levels predicted subsequent chronic course in those with a diagnosis at baseline in women but not in men (odds ratio women = 1.13, 95% confidence interval = 1.04–1.23), and both depressive disorder and high severity predicted higher IL-6 levels at the subsequent follow-up (p values

Published
2019

17. Comparing factor structures of depressed patients with and without suicidal ideation, a measurement invariance analysis

Author

Merijn Eikelenboom, Marjolein Fokkema, Wouter van Ballegooijen, Ad J. F. M. Kerkhof, Brenda W.J.H. Penninx, Jan H. Smit, Albert M. van Hemert, Heleen Riper, Psychiatry, APH - Mental Health, APH - Global Health, APH - Methodology, APH - Digital Health, and Clinical Psychology

Subjects
Adult, Male, Depressive disorders, media_common.quotation_subject, Major depressive disorder, Anxiety, 03 medical and health sciences, 0302 clinical medicine, Optimism, SDG 3 - Good Health and Well-being, Surveys and Questionnaires, Suicidal ideation, medicine, Humans, Measurement invariance, Latent variables, Depression (differential diagnoses), Netherlands, media_common, Depressive Disorder, Major, Depression, Middle Aged, medicine.disease, Confirmatory factor analysis, 030227 psychiatry, Psychiatry and Mental health, Clinical Psychology, Mood, Latent Class Analysis, Female, Factor analysis, medicine.symptom, Factor Analysis, Statistical, Psychology, 030217 neurology & neurosurgery, Clinical psychology
Abstract

Background: Suicidality could be associated with specific combinations of biological, social and psychologicalfactors. Therefore, depressive episodes with suicidal ideation could be different from depressive episodeswithout suicidal ideation in terms of latent variable structures.Methods: In this study we compared latent variable structures between suicidal and non-suicidal depressedpatients using confirmatory factor analysis (CFA), following a measurement invariance test procedure. Patients(N = 919) suffering from major depressive disorder were selected from the Netherlands Study of Depression andAnxiety (NESDA) and split into a group that showed no symptoms of suicidal ideation (non-SI; N = 691) and asuicidal ideation (SI) group that had one or more symptoms of suicidal ideation (N = 228). Depression andanxiety symptoms were measured using the short form of the Mood and Anxiety Symptoms Questionnaire(MASQ-D30).Results: CFA implied a difference in latent variable structures between the non-SI sample (CFI 0.957; RMSEA0.041) and the SI sample (CFI 0.900; RMSEA 0.056). Subsequent multiple-group CFA showed violations ofmeasurement invariance. The General distress and Anhedonic depression subscales were best indicated byhopelessness and lack of optimism in the SI sample and by dissatisfaction and not feeling lively in the non-SIsample. Overall, the SI sample had higher scores and lower inter-item correlations on the Anhedonic depressionitems.Limitations: We have included very mild cases of suicidal ideation in our SI sample.Conclusions: On a latent variable level, depression with suicidal ideation differs from depression without suicidalideation. Results encourage further research into the symptom structure of depression among suicidal patients

Published
2019

18. Not urbanization level but socioeconomic, physical and social neighbourhood characteristics are associated with presence and severity of depressive and anxiety disorders

Author

Brenda W.J.H. Penninx, Erik J. Timmermans, Ellen Generaal, Johannes H. Smit, Jasper Dekkers, Spatial Economics, Psychiatry, APH - Mental Health, Epidemiology and Data Science, APH - Methodology, and APH - Digital Health

Subjects
Adult, Male, Adolescent, Beck Anxiety Inventory, Severity of Illness Index, Young Adult, 03 medical and health sciences, environment and public health, social environment, 0302 clinical medicine, cohort studies, medicine, Humans, Socioeconomic status, Neighbourhood (mathematics), Applied Psychology, Depression (differential diagnoses), Aged, Netherlands, Depressive Disorder, Urbanization, Social environment, Original Articles, Middle Aged, anxiety, Anxiety Disorders, Mental health, residence characteristics, SDG 11 - Sustainable Cities and Communities, 030227 psychiatry, Psychiatry and Mental health, Cross-Sectional Studies, Socioeconomic Factors, Noise, Transportation, depression, Anxiety, Female, Safety, medicine.symptom, Psychology, environment, neighbourhood, 030217 neurology & neurosurgery, mental health, Follow-Up Studies, Cohort study, Clinical psychology
Abstract

BackgroundWhich neighbourhood factors most consistently impact on depression and anxiety remains unclear. This study examines whether objectively obtained socioeconomic, physical and social aspects of the neighbourhood in which persons live are associated with the presence and severity of depressive and anxiety disorders.MethodsCross-sectional data are from the Netherlands Study of Depression and Anxiety including participants (n = 2980) with and without depressive and anxiety disorders in the past year (based on DSM-based psychiatric interviews). We also determined symptom severity of depression (Inventory of Depression Symptomatology), anxiety (Beck Anxiety Inventory) and fear (Fear Questionnaire). Neighbourhood characteristics comprised socioeconomic factors (socioeconomic status, home value, number of social security beneficiaries and percentage of immigrants), physical factors (air pollution, traffic noise and availability of green space and water) and social factors (social cohesion and safety). Multilevel regression analyses were performed with the municipality as the second level while adjusting for individual sociodemographic variables and household income.ResultsNot urbanization grade, but rather neighbourhood socioecononomic factors (low socioeconomic status, more social security beneficiaries and more immigrants), physical factors (high levels of traffic noise) and social factors (lower social cohesion and less safety) were associated with the presence of depressive and anxiety disorders. Most of these neighbourhood characteristics were also associated with increased depressive and anxiety symptoms severity.ConclusionThese findings suggest that it is not population density in the neighbourhood, but rather the quality of socioeconomic, physical and social neighbourhood characteristics that is associated with the presence and severity of affective disorders.

Published
2019

19. Genome-Wide Association Scan of Serum Urea in European Populations Identifies Two Novel Loci

Author

Peter J. van der Most, Zoha Kamali, Johannes H. Smit, Toomas Haller, Brenda W.J.H. Penninx, Evelin Mihailov, Anna Reznichenko, Harold Snieder, Jeffrey Damman, Ahmad Vaez, Pim van der Harst, Gerjan Navis, Martin H. de Borst, Chris H. L. Thio, Ron T. Gansevoort, Niek Verweij, Andres Metspalu, Ilja M. Nolte, Groningen Kidney Center (GKC), Lifestyle Medicine (LM), Cardiovascular Centre (CVC), Value, Affordability and Sustainability (VALUE), Life Course Epidemiology (LCE), Groningen Institute for Organ Transplantation (GIOT), Psychiatry, APH - Mental Health, APH - Methodology, and APH - Digital Health

Subjects
RENAL-FUNCTION, Quantitative Trait Loci, 030232 urology & nephrology, Renal function, Genome-wide association study, Single-nucleotide polymorphism, SUSCEPTIBILITY, 030204 cardiovascular system & hematology, Kidney, Genome-wide association studies, Polymorphism, Single Nucleotide, Serum urea, KIDNEY-FUNCTION, White People, 03 medical and health sciences, Kidney function, 0302 clinical medicine, Reference Values, TOOL, Humans, Urea, Medicine, Gene, METAANALYSIS, Genetic association, Genetics, business.industry, Haplotype, Computational Biology, TARGET, Nephrology, Expression quantitative trait loci, MAP, Trait, HAPLOTYPES, business, TRAITS, Metabolic Networks and Pathways, Genome-Wide Association Study
Abstract

Background: Serum urea level is a heritable trait, commonly used as a diagnostic marker for kidney function. Genome-wide association studies (GWAS) in East-Asian populations identified a number of genetic loci related to serum urea, however there is a paucity of data for European populations. Methods: We performed a two-stage meta-analysis of GWASs on serum urea in 13,312 participants, with independent replication in 7,379 participants of European ancestry. Results: We identified 6 genome-wide significant single nucleotide polymorphisms (SNPs) in or near 6 loci, of which 2 were novel (POU2AF1 and ADAMTS9-AS2). Replication of East-Asian and Scottish data provided evidence for an additional 8 loci. SNPs tag regions previously associated with anthropometric traits, serum magnesium, and urinary albumin-to-creatinine ratio, as well as expression quantitative trait loci for genes preferentially expressed in kidney and gastro-intestinal tissues. Conclusions: Our findings provide insights into the genetic underpinnings of urea metabolism, with potential relevance to kidney function.

Published
2019

21. A Comparison of Ten Polygenic Score Methods for Psychiatric Disorders Applied Across Multiple Cohorts

Author

Guiyan Ni, Jian Zeng, Joana A. Revez, Ying Wang, Zhili Zheng, Tian Ge, Restuadi Restuadi, Jacqueline Kiewa, Dale R. Nyholt, Jonathan R.I. Coleman, Jordan W. Smoller, Jian Yang, Peter M. Visscher, Naomi R. Wray, Stephan Ripke, Benjamin M. Neale, Aiden Corvin, James T.R. Walters, Kai-How Farh, Peter A. Holmans, Phil Lee, Brendan Bulik-Sullivan, David A. Collier, Hailiang Huang, Tune H. Pers, Ingrid Agartz, Esben Agerbo, Margot Albus, Madeline Alexander, Farooq Amin, Silviu A. Bacanu, Martin Begemann, Richard A. Belliveau, Judit Bene, Sarah E. Bergen, Elizabeth Bevilacqua, Tim B. Bigdeli, Donald W. Black, Richard Bruggeman, Nancy G. Buccola, Randy L. Buckner, William Byerley, Wiepke Cahn, Guiqing Cai, Dominique Campion, Rita M. Cantor, Vaughan J. Carr, Noa Carrera, Stanley V. Catts, Kimberley D. Chambert, Raymond C.K. Chan, Ronald Y.L. Chen, Eric Y.H. Chen, Wei Cheng, Eric F.C. Cheung, Siow Ann Chong, C. Robert Cloninger, David Cohen, Nadine Cohen, Paul Cormican, Nick Craddock, James J. Crowley, Michael Davidson, Kenneth L. Davis, Franziska Degenhardt, Jurgen Del Favero, Ditte Demontis, Dimitris Dikeos, Timothy Dinan, Srdjan Djurovic, Gary Donohoe, Elodie Drapeau, Jubao Duan, Frank Dudbridge, Naser Durmishi, Peter Eichhammer, Johan Eriksson, Valentina Escott-Price, Laurent Essioux, Ayman H. Fanous, Martilias S. Farrell, Josef Frank, Lude Franke, Robert Freedman, Nelson B. Freimer, Marion Friedl, Joseph I. Friedman, Menachem Fromer, Giulio Genovese, Lyudmila Georgieva, Ina Giegling, Paola Giusti-Rodríguez, Stephanie Godard, Jacqueline I. Goldstein, Vera Golimbet, Srihari Gopal, Jacob Gratten, Lieuwe de Haan, Christian Hammer, Marian L. Hamshere, Mark Hansen, Thomas Hansen, Vahram Haroutunian, Annette M. Hartmann, Frans A. Henskens, Stefan Herms, Joel N. Hirschhorn, Per Hoffmann, Andrea Hofman, Mads V. Hollegaard, David M. Hougaard, Masashi Ikeda, Inge Joa, Antonio Julià, René S. Kahn, Luba Kalaydjieva, Sena Karachanak-Yankova, Juha Karjalainen, David Kavanagh, Matthew C. Keller, James L. Kennedy, Andrey Khrunin, Yunjung Kim, Janis Klovins, James A. Knowles, Bettina Konte, Vaidutis Kucinskas, Zita Ausrele Kucinskiene, Hana Kuzelova-Ptackova, Anna K. Kähler, Claudine Laurent, Jimmy Lee, S. Hong Lee, Sophie E. Legge, Bernard Lerer, Miaoxin Li, Tao Li, Kung-Yee Liang, Jeffrey Lieberman, Svetlana Limborska, Carmel M. Loughland, Jan Lubinski, Jouko Lönnqvist, Milan Macek, Patrik K.E. Magnusson, Brion S. Maher, Wolfgang Maier, Jacques Mallet, Sara Marsal, Manuel Mattheisen, Morten Mattingsdal, Robert W. McCarley, Colm McDonald, Andrew M. McIntosh, Sandra Meier, Carin J. Meijer, Bela Melegh, Ingrid Melle, Raquelle I. Mesholam-Gately, Andres Metspalu, Patricia T. Michie, Lili Milani, Vihra Milanova, Younes Mokrab, Derek W. Morris, Ole Mors, Kieran C. Murphy, Robin M. Murray, Inez Myin-Germeys, Bertram Müller-Myhsok, Mari Nelis, Igor Nenadic, Deborah A. Nertney, Gerald Nestadt, Kristin K. Nicodemus, Liene Nikitina-Zake, Laura Nisenbaum, Annelie Nordin, Eadbhard O’Callaghan, Colm O’Dushlaine, F. Anthony O’Neill, Sang-Yun Oh, Ann Olincy, Line Olsen, Jim Van Os, Psychosis Endophenotypes International Consortium, Christos Pantelis, George N. Papadimitriou, Sergi Papiol, Elena Parkhomenko, Michele T. Pato, Tiina Paunio, Milica Pejovic-Milovancevic, Diana O. Perkins, Olli Pietiläinen, Jonathan Pimm, Andrew J. Pocklington, John Powell, Alkes Price, Ann E. Pulver, Shaun M. Purcell, Digby Quested, Henrik B. Rasmussen, Abraham Reichenberg, Mark A. Reimers, Alexander L. Richards, Joshua L. Roffman, Panos Roussos, Douglas M. Ruderfer, Veikko Salomaa, Alan R. Sanders, Ulrich Schall, Christian R. Schubert, Thomas G. Schulze, Sibylle G. Schwab, Edward M. Scolnick, Rodney J. Scott, Larry J. Seidman, Jianxin Shi, Engilbert Sigurdsson, Teimuraz Silagadze, Jeremy M. Silverman, Kang Sim, Petr Slominsky, Hon-Cheong So, Chris C.A. Spencer, Eli A. Stahl, Hreinn Stefansson, Stacy Steinberg, Elisabeth Stogmann, Richard E. Straub, Eric Strengman, Jana Strohmaier, T. Scott Stroup, Mythily Subramaniam, Jaana Suvisaari, Dragan M. Svrakic, Jin P. Szatkiewicz, Erik Söderman, Srinivas Thirumalai, Draga Toncheva, Sarah Tosato, Juha Veijola, John Waddington, Dermot Walsh, Dai Wang, Qiang Wang, Bradley T. Webb, Mark Weiser, Dieter B. Wildenauer, Nigel M. Williams, Stephanie Williams, Stephanie H. Witt, Aaron R. Wolen, Emily H.M. Wong, Brandon K. Wormley, Hualin Simon Xi, Clement C. Zai, Xuebin Zheng, Fritz Zimprich, Kari Stefansson, Wellcome Trust Case-Control Consortium, Rolf Adolfsson, Ole A. Andreassen, Douglas H.R. Blackwood, Elvira Bramon, Joseph D. Buxbaum, Anders D. Børglum, Sven Cichon, Ariel Darvasi, Enrico Domenici, Hannelore Ehrenreich, Tõnu Esko, Pablo V. Gejman, Michael Gill, Hugh Gurling, Christina M. Hultman, Nakao Iwata, Assen V. Jablensky, Erik G. Jönsson, Kenneth S. Kendler, George Kirov, Jo Knight, Todd Lencz, Douglas F. Levinson, Qingqin S. Li, Jianjun Liu, Anil K. Malhotra, Steven A. McCarroll, Andrew McQuillin, Jennifer L. Moran, Preben B. Mortensen, Bryan J. Mowry, Markus M. Nöthen, Roel A. Ophoff, Michael J. Owen, Aarno Palotie, Carlos N. Pato, Tracey L. Petryshen, Danielle Posthuma, Marcella Rietschel, Brien P. Riley, Dan Rujescu, Pak C. Sham, Pamela Sklar, David St Clair, Daniel R. Weinberger, Jens R. Wendland, Thomas Werge, Mark J. Daly, Patrick F. Sullivan, Michael C. O’Donovan, Maciej Trzaskowski, Enda M. Byrne, Abdel Abdellaoui, Mark J. Adams, Tracy M. Air, Till F.M. Andlauer, Silviu-Alin Bacanu, Marie Bækvad-Hansen, Aartjan T.F. Beekman, Elisabeth B. Binder, Julien Bryois, Henriette N. Buttenschøn, Jonas Bybjerg-Grauholm, Na Cai, Enrique Castelao, Jane Hvarregaard Christensen, Toni-Kim Clarke, Lucía Colodro-Conde, Baptiste Couvy-Duchesne, Gregory E. Crawford, Gail Davies, Ian J. Deary, Eske M. Derks, Nese Direk, Conor V. Dolan, Erin C. Dunn, Thalia C. Eley, Farnush Farhadi Hassan Kiadeh, Hilary K. Finucane, Jerome C. Foo, Andreas J. Forstner, Héléna A. Gaspar, Fernando S. Goes, Scott D. Gordon, Jakob Grove, Lynsey S. Hall, Christine Søholm Hansen, Thomas F. Hansen, Ian B. Hickie, Georg Homuth, Carsten Horn, Jouke-Jan Hottenga, David M. Howard, Marcus Ising, Rick Jansen, Ian Jones, Lisa A. Jones, Eric Jorgenson, Isaac S. Kohane, Julia Kraft, Warren W. Kretzschmar, Zoltán Kutalik, Yihan Li, Penelope A. Lind, Donald J. MacIntyre, Dean F. MacKinnon, Robert M. Maier, Jonathan Marchini, Hamdi Mbarek, Patrick McGrath, Peter McGuffin, Sarah E. Medland, Divya Mehta, Christel M. Middeldorp, Evelin Mihailov, Yuri Milaneschi, Francis M. Mondimore, Grant W. Montgomery, Sara Mostafavi, Niamh Mullins, Matthias Nauck, Bernard Ng, Michel G. Nivard, Paul F. O’Reilly, Hogni Oskarsson, Jodie N. Painter, Carsten Bøcker Pedersen, Marianne Giørtz Pedersen, Roseann E. Peterson, Wouter J. Peyrot, Giorgio Pistis, Jorge A. Quiroz, Per Qvist, John P. Rice, Margarita Rivera, Saira Saeed Mirza, Robert Schoevers, Eva C. Schulte, Ling Shen, Stanley I. Shyn, Grant C.B. Sinnamon, Johannes H. Smit, Daniel J. Smith, Fabian Streit, Katherine E. Tansey, Henning Teismann, Alexander Teumer, Wesley Thompson, Pippa A. Thomson, Thorgeir E. Thorgeirsson, Matthew Traylor, Jens Treutlein, Vassily Trubetskoy, André G. Uitterlinden, Daniel Umbricht, Sandra Van der Auwera, Albert M. van Hemert, Alexander Viktorin, Yunpeng Wang, Shantel Marie Weinsheimer, Jürgen Wellmann, Gonneke Willemsen, Yang Wu, Hualin S. Xi, Futao Zhang, Volker Arolt, Bernhard T. Baune, Klaus Berger, Dorret I. Boomsma, Udo Dannlowski, E.J.C. de Geus, J. Raymond DePaulo, Katharina Domschke, Hans J. Grabe, Steven P. Hamilton, Caroline Hayward, Andrew C. Heath, Stefan Kloiber, Glyn Lewis, Susanne Lucae, Pamela A.F. Madden, Patrik K. Magnusson, Nicholas G. Martin, Preben Bo Mortensen, Merete Nordentoft, Sara A. Paciga, Nancy L. Pedersen, Adult Psychiatry, APH - Mental Health, ANS - Complex Trait Genetics, ANS - Mood, Anxiety, Psychosis, Stress & Sleep, Ni, Guiyan, Zeng, Jian, Revez, Joana A., Wang, Ying, Zhili, Zheng, Ge, Tian, Restuadi, Restuadi, Kiewa, Jacqueline, Nyholt, Dale R, Coleman, Jonathan RI, Smoller, Jordan W, Lee, S Hong, APH - Methodology, Biological Psychology, APH - Personalized Medicine, APH - Health Behaviors & Chronic Diseases, Econometrics, Psychiatry, Department of Technology and Operations Management, Child and Adolescent Psychiatry / Psychology, Epidemiology, Erasmus MC other, Urology, Internal Medicine, Medical Informatics, Immunology, Human genetics, Amsterdam Neuroscience - Complex Trait Genetics, Amsterdam Neuroscience - Compulsivity, Impulsivity & Attention, Amsterdam Reproduction & Development (AR&D), and Amsterdam Neuroscience - Mood, Anxiety, Psychosis, Stress & Sleep

Subjects
0301 basic medicine, Multifactorial Inheritance, medicine.medical_specialty, LDpred2, BF, Genomics, Disease, Major depressive disorder, risk prediction, 03 medical and health sciences, 0302 clinical medicine, MegaPRS, SDG 3 - Good Health and Well-being, medicine, Humans, Genetic Predisposition to Disease, ddc:610, Genetic risk, Psychiatry, Biological Psychiatry, Genetic association, Depressive Disorder, Major, business.industry, Mental Disorders, medicine.disease, Genetic architecture, Polygenic scores, Risk prediction, polygenic scores, PRS-CS, psychiatric disorders, 030104 developmental biology, SBayesR, Schizophrenia, Cohort, Lassosum, RC0321, business, Psychiatric disorders, 030217 neurology & neurosurgery, Genome-Wide Association Study
Abstract

BACKGROUND: Polygenic scores (PGSs), which assess the genetic risk of individuals for a disease, are calculated as a weighted count of risk alleles identified in genome-wide association studies. PGS methods differ in which DNA variants are included and the weights assigned to them; some require an independent tuning sample to help inform these choices. PGSs are evaluated in independent target cohorts with known disease status. Variability between target cohorts is observed in applications to real data sets, which could reflect a number of factors, e.g., phenotype definition or technical factors.METHODS: The Psychiatric Genomics Consortium Working Groups for schizophrenia and major depressive disorder bring together many independently collected case-control cohorts. We used these resources (31,328 schizophrenia cases, 41,191 controls; 248,750 major depressive disorder cases, 563,184 controls) in repeated application of leave-one-cohort-out meta-analyses, each used to calculate and evaluate PGS in the left-out (target) cohort. Ten PGS methods (the baseline PC+T method and 9 methods that model genetic architecture more formally: SBLUP, LDpred2-Inf, LDpred-funct, LDpred2, Lassosum, PRS-CS, PRS-CS-auto, SBayesR, MegaPRS) were compared.RESULTS: Compared with PC+T, the other 9 methods gave higher prediction statistics, MegaPRS, LDPred2, and SBayesR significantly so, explaining up to 9.2% variance in liability for schizophrenia across 30 target cohorts, an increase of 44%. For major depressive disorder across 26 target cohorts, these statistics were 3.5% and 59%, respectively.CONCLUSIONS: Although the methods that more formally model genetic architecture have similar performance, MegaPRS, LDpred2, and SBayesR rank highest in most comparisons and are recommended in applications to psychiatric disorders.

Published
2021

22. The mechanobiology of differential growth in Adolescent Idiopathic Scoliosis

Author

T H Smit, A Stadhouder, Medical Biology, AMS - Tissue Function & Regeneration, and Amsterdam Reproduction & Development (AR&D)

Subjects
business.industry, Cartilage, Intervertebral disc, Anatomy, Scoliosis, Lumbar vertebrae, medicine.disease, Skeleton (computer programming), Mechanobiology, medicine.anatomical_structure, medicine, Ligament, Posterior longitudinal ligament, business
Abstract

Introduction: Adolescent Idiopathic Scoliosis (AIS) is a multifactorial disorder that has been linked to genetic, hormonal, neurological, microbial and environmental cues. Eventually, however, AIS is a mechanical deformation of the spine, so an adequate theory of etiopathogenesis must provide an explanation for this and address the forces involved. Objective: In previous research with a physical model of the spine we showed that restrained differential growth, a mismatch of growth in mutually attached tissues, can result in the typical sequence of three-dimensional deformations seen in AIS.[1] Here we aim to identify the mechanobiological principles that may underlie this phenomenon and explain the deformities observed. Methods: We performed a literature study in Pubmed using the keywords growth, spine, tensegrity, muscle strength, vertebral body, growth plate, Hueter-Volkmann Law, intervertebral disc height, ligament, notochordal cells, and osmosis. Relevant information was gathered and combined for a comprehensive theory of etiopathogenesis for AIS. Results and Discussion: The human body is a tensegrity-like structure, in which muscles, ligaments and fasciae stabilize the skeleton. As the child grows, bone and cartilage elongate the muscles, ligaments and fasciae and induce their remodeling and growth. Considering the literature, we suggest the following scenario for the etiopathogenesis of AIS. During the growth spurt, there is a delay in muscular maturation, resulting in lowered prestress and decreased stability of the skeleton. According to Hueter-Volkmann, reduced axial compression enhances the growth of bones, which is indeed observed in AIS patients. Decreased spinal compression further results in lower vertebral bone density and increased disc height. Reduced dynamic loading also preserves the notochordal cells in the nucleus pulposus, which stimulates the production of proteoglycans and the assembly of the osmotic extracellular matrix. This intradiscal pressure increases intervertebral disc height to its limits, rendering the longitudinal ligaments and the annulus fibrosus under excessive tension (Figure 1). Under these conditions, spinal ligaments cannot remodel and therefore not grow with the intervertebral discs. The enhanced intradiscal pressure and locked ligamental remodeling embody the differential growth of the spine that results in scoliotic bending and rotation. Conclusion and Significance: AIS has been related to many physiological cues, yet the deformations observed remain essentially unexplained. The suggested differential growth mechanism fits well with the timing and speed of scoliotic deformations during the adolescent growth spurt. The identification of increased intradiscal pressure as the driving force of scoliotic deformities may be helpful to design prevention and treatment strategies for AIS.

Published
2021

23. Poor sleep quality among newly diagnosed head and neck cancer patients: prevalence and associated factors

Author

Johannes A. Langendijk, Robert J. Baatenburg de Jong, Femke Jansen, C. René Leemans, Johannes H. Smit, Angelina M. M. Santoso, Birgit I. Lissenberg-Witte, Robert P. Takes, Chris H.J. Terhaard, Annemieke van Straten, Irma M. Verdonck-de Leeuw, Clinical Psychology, APH - Mental Health, Otolaryngology / Head & Neck Surgery, Radiation Oncology, CCA - Cancer Treatment and quality of life, Psychiatry, APH - Methodology, Amsterdam Neuroscience - Complex Trait Genetics, Amsterdam Neuroscience - Mood, Anxiety, Psychosis, Stress & Sleep, APH - Personalized Medicine, Guided Treatment in Optimal Selected Cancer Patients (GUTS), Damage and Repair in Cancer Development and Cancer Treatment (DARE), and Otorhinolaryngology and Head and Neck Surgery

Subjects
Male, SYMPTOMS, STRESS, Cohort Studies, Pittsburgh Sleep Quality Index, 0302 clinical medicine, Risk Factors, Prevalence, Insomnia, Medicine, Longitudinal Studies, Prospective Studies, Head and neck cancer, PSYCHOLOGICAL DISTRESS, INDEX, SDG 5 - Gender Equality, OF-LIFE, Middle Aged, Sleep quality, Newly diagnosed, Distress, Oncology, Head and Neck Neoplasms, 030220 oncology & carcinogenesis, Cohort, Female, Original Article, medicine.symptom, Rare cancers Radboud Institute for Health Sciences [Radboudumc 9], Sleep Wake Disorders, medicine.medical_specialty, 03 medical and health sciences, SDG 3 - Good Health and Well-being, RADIATION-THERAPY, Internal medicine, Humans, Performance status, business.industry, 1ST YEAR, Odds ratio, medicine.disease, Comorbidity, Before treatment, INSOMNIA, PSYCHOMETRIC PROPERTIES, Cross-Sectional Studies, business, COPING STYLE, 030217 neurology & neurosurgery
Abstract

Background Head and neck cancer (HNC) patients often suffer from distress attributed to their cancer diagnosis which may disturb their sleep. However, there is lack of research about poor sleep quality among newly diagnosed HNC patients. Therefore, our aim was to investigate the prevalence and the associated factors of poor sleep quality among HNC patients before starting treatment. Materials and methods A cross-sectional study was conducted using the baseline data from NET-QUBIC study, an ongoing multi-center cohort of HNC patients in the Netherlands. Poor sleep quality was defined as a Pittsburgh Sleep Quality Index (PSQI) total score of > 5. Risk factors examined were sociodemographic factors (age, sex, education level, living situation), clinical characteristics (HNC subsite, tumor stage, comorbidity, performance status), lifestyle factors, coping styles, and HNC symptoms. Results Among 560 HNC patients, 246 (44%) had poor sleep quality before start of treatment. Several factors were found to be significantly associated with poor sleep: younger age (odds ratio [OR] for each additional year 0.98, 95% CI 0.96–1.00), being female (OR 2.6, 95% CI 1.7–4.1), higher passive coping style (OR 1.18, 95% CI 1.09–1.28), more oral pain (OR 1.10, 95% CI 1.01–1.19), and less sexual interest and enjoyment (OR 1.13, 95% CI 1.06–1.20). Conclusion Poor sleep quality is highly prevalent among HNC patients before start of treatment. Early evaluation and tailored intervention to improve sleep quality are necessary to prepare these patients for HNC treatment and its consequences.

Published
2021

24. Genome-wide association study identifies 48 common genetic variants associated with handedness

Author

Inês Barroso, Gail Davies, H.-Erich Wichmann, Bjarke Feenstra, Peter Vollenweider, Nicholas J. Timpson, Alan F. Wright, Frank Geller, Gérard Waeber, John M. Starr, Benjamin M. Neale, George Davey Smith, Tõnu Esko, Ruth J. F. Loos, Andrew A. Hicks, Pedro Marques-Vidal, Dorret I. Boomsma, Harry Campbell, Zoltán Kutalik, David M. Evans, Scott D. Gordon, Eva Albrecht, Peter P. Pramstaller, Leena Peltonen, Jing Hua Zhao, Lavinia Paternoster, Thomas Hansen, Massimo Mangino, Fazil Aliev, Beate St Pourcain, Panos Deloukas, Heather A. Boyd, Guillaume Paré, Marco P. Boks, Monique M.B. Breteler, Jouke-Jan Hottenga, Xin Li, Kari Stefansson, Ian J. Deary, Jari Lahti, Inga Prokopenko, Nicholas Eriksson, Lili Milani, Nicholas J. Wareham, Jordan W. Smoller, Norman Klopp, Lynn Cherkas, Reedik Mägi, Margaret J. Wright, Peter Kraft, Jacques S. Beckmann, Brenda W.J.H. Penninx, Gabriel Cuellar-Partida, André G. Uitterlinden, Fernando Rivadeneira, Wendy L. McArdle, Johan G. Eriksson, Jiali Han, Jennifer E. Huffman, Andres Metspalu, J.M. Vink, Frank J. A. van Rooij, Christian Gieger, M. Arfan Ikram, Cecilia M. Lindgren, Aarno Palotie, Daniel I. Chasman, Joyce Y. Tung, Liang-Dar Hwang, David A. Hinds, Elisabeth Widen, Caroline Hayward, Michelle Luciano, Johannes H. Smit, Gonneke Willemsen, Dale R. Nyholt, Carolina Medina-Gomez, Nicole M. Warrington, Teemu Palviainen, Stacy Steinberg, Kay-Tee Khaw, Kevin S. O’Connell, Bettina Konte, Gudmar Thorleifsson, Eco J. C. de Geus, John P. Kemp, Mads Melbye, Mark I. McCarthy, Sarah E. Medland, Jaakko Kaprio, Cameron D. Palmer, Joel N. Hirschhorn, Ina Giegling, Scott Melville, Thomas Werge, Nicole Soranzo, Sigurdur H. Magnusson, Maris Teder-Laving, Hreinn Stefansson, Kauko Heikkilä, Cornelia M. van Duijn, David L. Duffy, Samuli Ripatti, Igor Rudan, Annette M. Hartmann, Ole A. Andreassen, Mari Nelis, Ozren Polasek, Vincent Mooser, Mousheng Xu, Eero Vuoksimaa, Katri Räikkönen, Nicholas G. Martin, Dan Rujescu, Tim D. Spector, Dawn M. Waterworth, Danielle M. Dick, Roel A. Ophoff, Epidemiology, Internal Medicine, Psychiatry, Biological Psychology, APH - Mental Health, APH - Methodology, APH - Health Behaviors & Chronic Diseases, APH - Personalized Medicine, Epidemiology and Data Science, Amsterdam Neuroscience - Complex Trait Genetics, Amsterdam Neuroscience - Mood, Anxiety, Psychosis, Stress & Sleep, Pediatric surgery, and APH - Digital Health

Subjects
Male, Netherlands Twin Register (NTR), Linkage disequilibrium, Genome-wide association study, LANGUAGE DOMINANCE, Functional Laterality, Linkage Disequilibrium, Behavioral Neuroscience, 0302 clinical medicine, ddc:150, Gene Frequency, SCHIZOPHRENIA, Genetics, 0303 health sciences, Middle Aged, genetics [Genetic Variation], genetics [Functional Laterality], Schizophrenia, ASYMMETRY, genetics [Polymorphism, Single Nucleotide], Female, Adult, Social Psychology, LATERALIZATION, Experimental and Cognitive Psychology, genetics [Genetic Loci], Biology, Quantitative trait locus, Genetic correlation, Polymorphism, Single Nucleotide, Article, 03 medical and health sciences, LINKAGE ANALYSIS, METAANALYSIS, MICROTUBULE, AUTISM, ORIGINS, SCREEN, Quantitative Trait, Heritable, Sex Factors, Genetic linkage, medicine, Humans, Bipolar disorder, 030304 developmental biology, Genetic association study, Aged, Genetic Variation, medicine.disease, Genetic Loci, Autism, genetics [Gene Frequency], Developmental Psychopathology, 030217 neurology & neurosurgery, Neuroscience, Genome-Wide Association Study
Abstract

Handedness, a consistent asymmetry in skill or use of the hands, has been studied extensively because of its relationship with language and the over-representation of left-handers in some neurodevelopmental disorders. Using data from the UK Biobank, 23andMe and 32 studies from the International Handedness Consortium, we conducted the world’s largest genome-wide association study of handedness (1,534,836 right-handed, 194,198 (11.0%) left-handed and 37,637 (2.1%) ambidextrous individuals). We found 41 genetic loci associated with left-handedness and seven associated with ambidexterity at genome-wide levels of significance (P < 5×10−8). Tissue enrichment analysis implicated the central nervous system and brain tissues including the hippocampus and cerebrum in the etiology of left-handedness. Pathways including regulation of microtubules, neurogenesis, axonogenesis and hippocampus morphology were also highlighted. We found suggestive positive genetic correlations between being left-handed and some neuropsychiatric traits including schizophrenia and bipolar disorder. SNP heritability analyses indicated that additive genetic effects of genotyped variants explained 5.9% (95% CI = 5.8% – 6.0%) of the underlying liability of being left-handed, while the narrow sense heritability was estimated at 12% (95% CI = 7.2% – 17.7%). Further, we show that genetic correlation between left-handedness and ambidexterity is low (rg = 0.26; 95% CI = 0.08 – 0.43) implying that these traits are largely influenced by different genetic mechanisms. In conclusion, our findings suggest that handedness, like many other complex traits is highly polygenic, and that the genetic variants that predispose to left-handedness may underlie part of the association with some psychiatric disorders that has been observed in multiple observational studies.

Published
2021

25. Synaptic processes and immune-related pathways implicated in Tourette syndrome

Author

Fotis Tsetsos, Dongmei Yu, Jae Hoon Sul, Alden Y. Huang, Cornelia Illmann, Lisa Osiecki, Sabrina M. Darrow, Matthew E. Hirschtritt, Erica Greenberg, Kirsten R. Muller-Vahl, Manfred Stuhrmann, Yves Dion, Guy A. Rouleau, Harald Aschauer, Mara Stamenkovic, Monika Schlögelhofer, Paul Sandor, Cathy L. Barr, Marco A. Grados, Harvey S. Singer, Markus M. Nöthen, Johannes Hebebrand, Anke Hinney, Robert A. King, Thomas V. Fernandez, Csaba Barta, Zsanett Tarnok, Peter Nagy, Christel Depienne, Yulia Worbe, Andreas Hartmann, Cathy L. Budman, Renata Rizzo, Gholson J. Lyon, William M. McMahon, James R. Batterson, Danielle C. Cath, Irene A. Malaty, Michael S. Okun, Cheston Berlin, Douglas W. Woods, Paul C. Lee, Joseph Jankovic, Mary M. Robertson, Donald L. Gilbert, Lawrence W. Brown, Barbara J. Coffey, Andrea Dietrich, Pieter J. Hoekstra, Samuel Kuperman, Samuel H. Zinner, Michael Wagner, James A. Knowles, A. Jeremy Willsey, Jay A. Tischfield, Gary A. Heiman, Nancy J. Cox, Nelson B. Freimer, Benjamin M. Neale, Lea K. Davis, Giovanni Coppola, Carol A. Mathews, Jeremiah M. Scharf, Peristera Paschou, on behalf of the Tourette Association of America International Consortium for Genetics, Sabrina Darrow, Roger Kurlan, James F. Leckman, Jan H. Smit, the Gilles de la Tourette GWAS Replication Initiative, Harald Aschauer Harald Aschauer, Anastasios Konstantinidis, Kirsten Müller-Vahl, Tomasz Wolanczyk, the Tourette International Collaborative Genetics Study, Lawrence Brown, Keun-Ah Cheon, Blanca Garcia-Delgar, Donald Gilbert, Dorothy E. Grice, Julie Hagstrøm, Tammy Hedderly, Isobel Heyman, Chaim Huyser, Young Key Kim, Young-Shin Kim, Yun-Joo Koh, Sodahm Kook, Bennett L. Leventhal, Marcos Madruga-Garrido, Pablo Mir, Astrid Morer, Alexander Münchau, Kerstin J. Plessen, Veit Roessner, Eun-Young Shin, Dong-Ho Song, Jungeun Song, Samuel Zinner, and the Psychiatric Genomics Consortium Tourette Syndrome Working Group, Thomas Fernandez, Gary Heiman, Pieter Hoekstra, Jay Tischfield, Douglas Woods, European Commission, State Scholarships Foundation, National Institutes of Health (US), Clinical Cognitive Neuropsychiatry Research Program (CCNP), Child Psychiatry, ANS - Cellular & Molecular Mechanisms, Tourette Association of America International Consortium for Genetics, Gilles de la Tourette GWAS Replication Initiative, Tourette International Collaborative Genetics Study, Psychiatric Genomics Consortium Tourette Syndrome Working Group, Psychiatry, APH - Mental Health, APH - Methodology, Amsterdam Neuroscience - Complex Trait Genetics, and Amsterdam Neuroscience - Mood, Anxiety, Psychosis, Stress & Sleep

Subjects
0301 basic medicine, Cell type, Genotype, Medizin, LOCI, Genome-wide association study, GENE-SET ANALYSIS, Biology, Molecular neuroscience, Tourette syndrome, Article, lcsh:RC321-571, TIC DISORDERS, 03 medical and health sciences, Cellular and Molecular Neuroscience, 0302 clinical medicine, medicine, Humans, Copy-number variation, GENOME-WIDE ASSOCIATION, AUTISM, Cell adhesion, Gene, lcsh:Neurosciences. Biological psychiatry. Neuropsychiatry, Biological Psychiatry, Neurons, COPY NUMBER VARIANTS, Cell adhesion molecule, Comparative genomics, medicine.disease, Genetic architecture, 3. Good health, PREVALENCE, Psychiatry and Mental health, 030104 developmental biology, HISTIDINE-DECARBOXYLASE, HEALTH, Neuroscience, 030217 neurology & neurosurgery, SYSTEM, Genome-Wide Association Study, Tourette Syndrome
Abstract

Tsetsos, Fotis et al., Tourette syndrome (TS) is a neuropsychiatric disorder of complex genetic architecture involving multiple interacting genes. Here, we sought to elucidate the pathways that underlie the neurobiology of the disorder through genome-wide analysis. We analyzed genome-wide genotypic data of 3581 individuals with TS and 7682 ancestry-matched controls and investigated associations of TS with sets of genes that are expressed in particular cell types and operate in specific neuronal and glial functions. We employed a self-contained, set-based association method (SBA) as well as a competitive gene set method (MAGMA) using individual-level genotype data to perform a comprehensive investigation of the biological background of TS. Our SBA analysis identified three significant gene sets after Bonferroni correction, implicating ligand-gated ion channel signaling, lymphocytic, and cell adhesion and transsynaptic signaling processes. MAGMA analysis further supported the involvement of the cell adhesion and trans-synaptic signaling gene set. The lymphocytic gene set was driven by variants in FLT3, raising an intriguing hypothesis for the involvement of a neuroinflammatory element in TS pathogenesis. The indications of involvement of ligand-gated ion channel signaling reinforce the role of GABA in TS, while the association of cell adhesion and trans-synaptic signaling gene set provides additional support for the role of adhesion molecules in neuropsychiatric disorders. This study reinforces previous findings but also provides new insights into the neurobiology of TS., This research is co-financed by Greece and the European Union (European Social Fund—ESF) through the Operational Programme «Human Resources Development, Education and Lifelong Learning» in the context of the project “Reinforcement of Postdoctoral Researchers - 2nd Cycle” (MIS-5033021), implemented by the State Scholarships Foundation (IKY). L.K.D. was supported by grants from the National Institutes of Health including U54MD010722-04, R01NS102371, R01MH113362, U01HG009086, R01MH118223, DP2HD98859, R01DC16977, R01NS105746, R56MH120736, R21HG010652, and RM1HG009034.

Published
2021

26. A Single Axial Impact Load Causes Articular Damage That Is Not Visible with Micro-Computed Tomography: An Ex Vivo Study on Caprine Tibiotalar Joints

Author

Leo J. van Ruijven, Theo H. Smit, Douwe Mol, Gino M. M. J. Kerkhoffs, Robin P. Blom, Graduate School, AMS - Ageing & Morbidty, AMS - Restoration & Development, AMS - Sports & Work, ARD - Amsterdam Reproduction and Development, Orthopedic Surgery and Sports Medicine, Medical Biology, AMS - Tissue Function & Regeneration, AMS - Sports, Academic Centre for Dentistry Amsterdam, and Oral Cell Biology

Subjects
030203 arthritis & rheumatology, business.industry, Tibiotalar joint, Micro computed tomography, 0206 medical engineering, Biomedical Engineering, Biomechanics, Physical Therapy, Sports Therapy and Rehabilitation, 02 engineering and technology, Osteoarthritis, medicine.disease, 020601 biomedical engineering, 03 medical and health sciences, 0302 clinical medicine, Impact loading, medicine, Immunology and Allergy, Ankle sprain, business, Ex vivo, Biomedical engineering
Abstract

Objective Excessive articular loading, for example, an ankle sprain, may result in focal osteochondral damage, initiating a vicious degenerative process resulting in posttraumatic osteoarthritis (PTOA). Better understanding of this degenerative process would allow improving posttraumatic care with the aim to prevent PTOA. The primary objective of this study was to establish a drop-weight impact testing model with controllable, reproducible and quantitative axial impact loads to induce osteochondral damage in caprine tibiotalar joints. We aimed to induce osteochondral damage on microscale level of the tibiotalar joint without gross intra-articular fractures of the tibial plafond. Design Fresh-frozen tibiotalar joints of mature goats were used as ex vivo articulating joint models. Specimens were axially impacted by a mass of 10.5 kg dropped from a height of 0.3 m, resulting in a speed of 2.4 m/s, an impact energy of 31.1 J and an impact impulse of 25.6 N·s. Potential osteochondral damage of the caprine tibiotalar joints was assessed using contrast-enhanced high-resolution micro-computed tomography (micro-CT). Subsequently, we performed quasi-static loading experiments to determine postimpact mechanical behavior of the tibiotalar joints. Results Single axial impact loads with a mass of 15.5 kg dropped from 0.3 m, resulted in intra-articular fractures of the tibial plafond, where a mass of 10.55 kg dropped from 0.3 m did not result in any macroscopic damage. In addition, contrast-enhanced high-resolution micro-CT imaging neither reveal any acute microdamage (i.e., microcracks) of the subchondral bone nor any (micro)structural changes in articular cartilage. The Hexabrix content or voxel density (i.e., proteoglycan content of the articular cartilage) on micro-CT did not show any differences between intact and impacted specimens. However, quasi-static whole-tibiotalar-joint loading showed an altered biomechanical behavior after application of a single axial impact (i.e., increased hysteresis when compared with the intact or nonimpacted specimens). Conclusions Single axial impact loads did not induce osteochondral damage visible with high-resolution contrast-enhanced micro-CT. However, despite the lack of damage on macro- and even microscale, the single axial impact loads resulted in “invisible injuries” because of the observed changes in the whole-joint biomechanics of the caprine tibiotalar joints. Future research must focus on diagnostic tools for the detection of early changes in articular cartilage after a traumatic impact (i.e., ankle sprains or ankle fractures), as it is well known that this could result in PTOA.

Published
2021

27. Fabrication, defect chemistry and microstructure of Mn-doped UO2

Author

H. Smith, L. T. Townsend, R. Mohun, J. F. W. Mosselmans, K. Kvashnina, Neil C. Hyatt, and C. L. Corkhill

Subjects
Medicine, Science
Abstract

Abstract Mn-doped UO2 is under consideration for use as an accident tolerant nuclear fuel. We detail the synthesis of Mn-doped UO2 prepared via a wet co-precipitation method, which was refined to improve the yield of incorporated Mn. To verify the Mn-doped UO2 defect chemistry, X-ray absorption spectroscopy at the Mn K-edge was performed, in addition to X-ray diffraction, Raman spectroscopy and high-energy resolved fluorescence detection X-ray absorption near edge spectroscopy at the U M4-edge. It was established that Mn2+ directly substitutes for U4+ in the UO2 lattice, accompanied by oxygen vacancy (Ov) charge compensation. In contrast to other divalent-element doped UO2 materials, compelling evidence for U5+ in a charge compensating role was not found. This work furthers understanding of the structure and crystal chemistry of Mn-doped UO2, which could show potential advantages as a novel efficient advanced nuclear fuel.

Published
2024
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28. In vivo characterization of chick embryo mesoderm by optical coherence tomography-assisted microindentation

Author

Ben K.A. Nelemans, Davide Iannuzzi, Theo H. Smit, Nelda Antonovaite, Ariana Ahmadzada, Marica Marrese, Biophotonics and Medical Imaging, LaserLaB - Biophotonics and Microscopy, Amsterdam Neuroscience - Brain Imaging, Medical Biology, AMS - Amsterdam Movement Sciences, ARD - Amsterdam Reproduction and Development, and AMS - Tissue Function & Regeneration

Subjects
0301 basic medicine, Mesoderm, animal structures, Morphogenesis, Chick Embryo, Biochemistry, 03 medical and health sciences, 0302 clinical medicine, Optical coherence tomography, In vivo, Genetics, medicine, Paraxial mesoderm, Animals, Molecular Biology, Research Articles, microindentation, optical coherence tomography, medicine.diagnostic_test, Chemistry, Mesenchymal stem cell, Stiffness, Embryo, Elasticity, Biomechanical Phenomena, in vivo mechanical properties, 030104 developmental biology, medicine.anatomical_structure, chicken embryos, embryonic structures, medicine.symptom, Tomography, Optical Coherence, 030217 neurology & neurosurgery, Research Article, Biotechnology, Biomedical engineering
Abstract

Embryos are growing organisms with highly heterogeneous properties in space and time. Understanding the mechanical properties is a crucial prerequisite for the investigation of morphogenesis. During the last 10 years, new techniques have been developed to evaluate the mechanical properties of biological tissues in vivo. To address this need, we employed a new instrument that, via the combination of micro‐indentation with Optical Coherence Tomography (OCT), allows us to determine both, the spatial distribution of mechanical properties of chick embryos, and the structural changes in real‐time. We report here the stiffness measurements on the live chicken embryo, from the mesenchymal tailbud to the epithelialized somites. The storage modulus of the mesoderm increases from (176 ± 18) Pa in the tail to (716 ± 117) Pa in the somitic region (mean ± SEM, n = 12). The midline has a mean storage modulus of (947 ± 111) Pa in the caudal (PSM) presomitic mesoderm (mean ± SEM, n = 12), indicating a stiff rod along the body axis, which thereby mechanically supports the surrounding tissue. The difference in stiffness between midline and presomitic mesoderm decreases as the mesoderm forms somites. This study provides an efficient method for the biomechanical characterization of soft biological tissues in vivo and shows that the mechanical properties strongly relate to different morphological features of the investigated regions.

Published
2020

29. The Genetics of the Mood Disorder Spectrum: Genome-wide Association Analyses of More Than 185,000 Cases and 439,000 Controls

Author

Jonathan R.I. Coleman, Héléna A. Gaspar, Julien Bryois, Gerome Breen, Enda M. Byrne, Andreas J. Forstner, Peter A. Holmans, Christiaan A. de Leeuw, Manuel Mattheisen, Andrew McQuillin, Jennifer M. Whitehead Pavlides, Tune H. Pers, Stephan Ripke, Eli A. Stahl, Stacy Steinberg, Vassily Trubetskoy, Maciej Trzaskowski, Yunpeng Wang, Liam Abbott, Abdel Abdellaoui, Mark J. Adams, Annelie Nordin Adolfsson, Esben Agerbo, Huda Akil, Diego Albani, Ney Alliey-Rodriguez, Thomas D. Als, Till F.M. Andlauer, Adebayo Anjorin, Verneri Antilla, Sandra Van der Auwera, Swapnil Awasthi, Silviu-Alin Bacanu, Judith A. Badner, Marie Bækvad-Hansen, Jack D. Barchas, Nicholas Bass, Michael Bauer, Aartjan T.F. Beekman, Richard Belliveau, Sarah E. Bergen, Tim B. Bigdeli, Elisabeth B. Binder, Erlend Bøen, Marco Boks, James Boocock, Monika Budde, William Bunney, Margit Burmeister, Henriette N. Buttenschøn, Jonas Bybjerg-Grauholm, William Byerley, Na Cai, Miquel Casas, Enrique Castelao, Felecia Cerrato, Pablo Cervantes, Kimberly Chambert, Alexander W. Charney, Danfeng Chen, Jane Hvarregaard Christensen, Claire Churchhouse, David St Clair, Toni-Kim Clarke, Lucía Colodro-Conde, William Coryell, Baptiste Couvy-Duchesne, David W. Craig, Gregory E. Crawford, Cristiana Cruceanu, Piotr M. Czerski, Anders M. Dale, Gail Davies, Ian J. Deary, Franziska Degenhardt, Jurgen Del-Favero, J Raymond DePaulo, Eske M. Derks, Nese Direk, Srdjan Djurovic, Amanda L. Dobbyn, Conor V. Dolan, Ashley Dumont, Erin C. Dunn, Thalia C. Eley, Torbjørn Elvsåshagen, Valentina Escott-Price, Chun Chieh Fan, Hilary K. Finucane, Sascha B. Fischer, Matthew Flickinger, Jerome C. Foo, Tatiana M. Foroud, Liz Forty, Josef Frank, Christine Fraser, Nelson B. Freimer, Louise Frisén, Katrin Gade, Diane Gage, Julie Garnham, Claudia Giambartolomei, Fernando S. Goes, Jaqueline Goldstein, Scott D. Gordon, Katherine Gordon-Smith, Elaine K. Green, Melissa J. Green, Tiffany A. Greenwood, Jakob Grove, Weihua Guan, Lynsey S. Hall, Marian L. Hamshere, Christine Søholm Hansen, Thomas F. Hansen, Martin Hautzinger, Urs Heilbronner, Albert M. van Hemert, Stefan Herms, Ian B. Hickie, Maria Hipolito, Per Hoffmann, Dominic Holland, Georg Homuth, Carsten Horn, Jouke-Jan Hottenga, Laura Huckins, Marcus Ising, Stéphane Jamain, Rick Jansen, Jessica S. Johnson, Simone de Jong, Eric Jorgenson, Anders Juréus, Radhika Kandaswamy, Robert Karlsson, James L. Kennedy, Farnush Farhadi Hassan Kiadeh, Sarah Kittel-Schneider, James A. Knowles, Manolis Kogevinas, Isaac S. Kohane, Anna C. Koller, Julia Kraft, Warren W. Kretzschmar, Jesper Krogh, Ralph Kupka, Zoltán Kutalik, Catharina Lavebratt, Jacob Lawrence, William B. Lawson, Markus Leber, Phil H. Lee, Shawn E. Levy, Jun Z. Li, Yihan Li, Penelope A. Lind, Chunyu Liu, Loes M. Olde Loohuis, Anna Maaser, Donald J. MacIntyre, Dean F. MacKinnon, Pamela B. Mahon, Wolfgang Maier, Robert M. Maier, Jonathan Marchini, Lina Martinsson, Hamdi Mbarek, Steve McCarroll, Patrick McGrath, Peter McGuffin, Melvin G. McInnis, James D. McKay, Helena Medeiros, Sarah E. Medland, Divya Mehta, Fan Meng, Christel M. Middeldorp, Evelin Mihailov, Yuri Milaneschi, Lili Milani, Saira Saeed Mirza, Francis M. Mondimore, Grant W. Montgomery, Derek W. Morris, Sara Mostafavi, Thomas W. Mühleisen, Niamh Mullins, Matthias Nauck, Bernard Ng, Hoang Nguyen, Caroline M. Nievergelt, Michel G. Nivard, Evaristus A. Nwulia, Dale R. Nyholt, Claire O'Donovan, Paul F. O'Reilly, Anil P.S. Ori, Lilijana Oruc, Urban Ösby, Hogni Oskarsson, Jodie N. Painter, José Guzman Parra, Carsten Bøcker Pedersen, Marianne Giørtz Pedersen, Amy Perry, Roseann E. Peterson, Erik Pettersson, Wouter J. Peyrot, Andrea Pfennig, Giorgio Pistis, Shaun M. Purcell, Jorge A. Quiroz, Per Qvist, Eline J. Regeer, Andreas Reif, Céline S. Reinbold, John P. Rice, Brien P. Riley, Fabio Rivas, Margarita Rivera, Panos Roussos, Douglas M. Ruderfer, Euijung Ryu, Cristina Sánchez-Mora, Alan F. Schatzberg, William A. Scheftner, Robert Schoevers, Nicholas J. Schork, Eva C. Schulte, Tatyana Shehktman, Ling Shen, Jianxin Shi, Paul D. Shilling, Stanley I. Shyn, Engilbert Sigurdsson, Claire Slaney, Olav B. Smeland, Johannes H. Smit, Daniel J. Smith, Janet L. Sobell, Anne T. Spijker, Michael Steffens, John S. Strauss, Fabian Streit, Jana Strohmaier, Szabolcs Szelinger, Katherine E. Tansey, Henning Teismann, Alexander Teumer, Robert C. Thompson, Wesley Thompson, Pippa A. Thomson, Thorgeir E. Thorgeirsson, Matthew Traylor, Jens Treutlein, André G. Uitterlinden, Daniel Umbricht, Helmut Vedder, Alexander Viktorin, Peter M. Visscher, Weiqing Wang, Stanley J. Watson, Bradley T. Webb, Cynthia Shannon Weickert, Thomas W. Weickert, Shantel Marie Weinsheimer, Jürgen Wellmann, Gonneke Willemsen, Stephanie H. Witt, Yang Wu, Hualin S. Xi, Wei Xu, Jian Yang, Allan H. Young, Peter Zandi, Peng Zhang, Futao Zhang, Sebastian Zollner, Rolf Adolfsson, Ingrid Agartz, Martin Alda, Volker Arolt, Lena Backlund, Bernhard T. Baune, Frank Bellivier, Klaus Berger, Wade H. Berrettini, Joanna M. Biernacka, Douglas H.R. Blackwood, Michael Boehnke, Dorret I. Boomsma, Aiden Corvin, Nicholas Craddock, Mark J. Daly, Udo Dannlowski, Enrico Domenici, Katharina Domschke, Tõnu Esko, Bruno Etain, Mark Frye, Janice M. Fullerton, Elliot S. Gershon, E.J.C. de Geus, Michael Gill, Fernando Goes, Hans J. Grabe, Maria Grigoroiu-Serbanescu, Steven P. Hamilton, Joanna Hauser, Caroline Hayward, Andrew C. Heath, David M. Hougaard, Christina M. Hultman, Ian Jones, Lisa A. Jones, René S. Kahn, Kenneth S. Kendler, George Kirov, Stefan Kloiber, Mikael Landén, Marion Leboyer, Glyn Lewis, Qingqin S. Li, Jolanta Lissowska, Susanne Lucae, Pamela A.F. Madden, Patrik K. Magnusson, Nicholas G. Martin, Fermin Mayoral, Susan L. McElroy, Andrew M. McIntosh, Francis J. McMahon, Ingrid Melle, Andres Metspalu, Philip B. Mitchell, Gunnar Morken, Ole Mors, Preben Bo Mortensen, Bertram Müller-Myhsok, Richard M. Myers, Benjamin M. Neale, Vishwajit Nimgaonkar, Merete Nordentoft, Markus M. Nöthen, Michael C. O'Donovan, Ketil J. Oedegaard, Michael J. Owen, Sara A. Paciga, Carlos Pato, Michele T. Pato, Nancy L. Pedersen, Brenda W.J. H. Penninx, Roy H. Perlis, David J. Porteous, Danielle Posthuma, James B. Potash, Martin Preisig, Josep Antoni Ramos-Quiroga, Marta Ribasés, Marcella Rietschel, Guy A. Rouleau, Catherine Schaefer, Martin Schalling, Peter R. Schofield, Thomas G. Schulze, Alessandro Serretti, Jordan W. Smoller, Hreinn Stefansson, Kari Stefansson, Eystein Stordal, Henning Tiemeier, Gustavo Turecki, Rudolf Uher, Arne E. Vaaler, Eduard Vieta, John B. Vincent, Henry Völzke, Myrna M. Weissman, Thomas Werge, Ole A. Andreassen, Anders D. Børglum, Sven Cichon, Howard J. Edenberg, Arianna Di Florio, John Kelsoe, Douglas F. Levinson, Cathryn M. Lewis, John I. Nurnberger, Roel A. Ophoff, Laura J. Scott, Pamela Sklar, Patrick F. Sullivan, Naomi R. Wray, APH - Methodology, Biological Psychology, APH - Personalized Medicine, APH - Health Behaviors & Chronic Diseases, APH - Mental Health, Amsterdam Neuroscience - Complex Trait Genetics, Complex Trait Genetics, Epidemiology, Erasmus MC other, Urology, Psychiatry, Internal Medicine, Medical Informatics, Immunology, Child and Adolescent Psychiatry / Psychology, Adult Psychiatry, Coleman J.R.I., Gaspar H.A., Bryois J., Byrne E.M., Forstner A.J., Holmans P.A., de Leeuw C.A., Mattheisen M., McQuillin A., Whitehead Pavlides J.M., Pers T.H., Ripke S., Stahl E.A., Steinberg S., Trubetskoy V., Trzaskowski M., Wang Y., Abbott L., Abdellaoui A., Adams M.J., Adolfsson A.N., Agerbo E., Akil H., Albani D., Alliey-Rodriguez N., Als T.D., Andlauer T.F.M., Anjorin A., Antilla V., Van der Auwera S., Awasthi S., Bacanu S.-A., Badner J.A., Baekvad-Hansen M., Barchas J.D., Bass N., Bauer M., Beekman A.T.F., Belliveau R., Bergen S.E., Bigdeli T.B., Binder E.B., Boen E., Boks M., Boocock J., Budde M., Bunney W., Burmeister M., Buttenschon H.N., Bybjerg-Grauholm J., Byerley W., Cai N., Casas M., Castelao E., Cerrato F., Cervantes P., Chambert K., Charney A.W., Chen D., Christensen J.H., Churchhouse C., St Clair D., Clarke T.-K., Colodro-Conde L., Coryell W., Couvy-Duchesne B., Craig D.W., Crawford G.E., Cruceanu C., Czerski P.M., Dale A.M., Davies G., Deary I.J., Degenhardt F., Del-Favero J., DePaulo J.R., Derks E.M., Direk N., Djurovic S., Dobbyn A.L., Dolan C.V., Dumont A., Dunn E.C., Eley T.C., Elvsashagen T., Escott-Price V., Fan C.C., Finucane H.K., Fischer S.B., Flickinger M., Foo J.C., Foroud T.M., Forty L., Frank J., Fraser C., Freimer N.B., Frisen L., Gade K., Gage D., Garnham J., Giambartolomei C., Goes F.S., Goldstein J., Gordon S.D., Gordon-Smith K., Green E.K., Green M.J., Greenwood T.A., Grove J., Guan W., Hall L.S., Hamshere M.L., Hansen C.S., Hansen T.F., Hautzinger M., Heilbronner U., van Hemert A.M., Herms S., Hickie I.B., Hipolito M., Hoffmann P., Holland D., Homuth G., Horn C., Hottenga J.-J., Huckins L., Ising M., Jamain S., Jansen R., Johnson J.S., de Jong S., Jorgenson E., Jureus A., Kandaswamy R., Karlsson R., Kennedy J.L., Hassan Kiadeh F.F., Kittel-Schneider S., Knowles J.A., Kogevinas M., Kohane I.S., Koller A.C., Kraft J., Kretzschmar W.W., Krogh J., Kupka R., Kutalik Z., Lavebratt C., Lawrence J., Lawson W.B., Leber M., Lee P.H., Levy S.E., Li J.Z., Li Y., Lind P.A., Liu C., Olde Loohuis L.M., Maaser A., MacIntyre D.J., MacKinnon D.F., Mahon P.B., Maier W., Maier R.M., Marchini J., Martinsson L., Mbarek H., McCarroll S., McGrath P., McGuffin P., McInnis M.G., McKay J.D., Medeiros H., Medland S.E., Mehta D., Meng F., Middeldorp C.M., Mihailov E., Milaneschi Y., Milani L., Mirza S.S., Mondimore F.M., Montgomery G.W., Morris D.W., Mostafavi S., Muhleisen T.W., Mullins N., Nauck M., Ng B., Nguyen H., Nievergelt C.M., Nivard M.G., Nwulia E.A., Nyholt D.R., O'Donovan C., O'Reilly P.F., Ori A.P.S., Oruc L., Osby U., Oskarsson H., Painter J.N., Parra J.G., Pedersen C.B., Pedersen M.G., Perry A., Peterson R.E., Pettersson E., Peyrot W.J., Pfennig A., Pistis G., Purcell S.M., Quiroz J.A., Qvist P., Regeer E.J., Reif A., Reinbold C.S., Rice J.P., Riley B.P., Rivas F., Rivera M., Roussos P., Ruderfer D.M., Ryu E., Sanchez-Mora C., Schatzberg A.F., Scheftner W.A., Schoevers R., Schork N.J., Schulte E.C., Shehktman T., Shen L., Shi J., Shilling P.D., Shyn S.I., Sigurdsson E., Slaney C., Smeland O.B., Smit J.H., Smith D.J., Sobell J.L., Spijker A.T., Steffens M., Strauss J.S., Streit F., Strohmaier J., Szelinger S., Tansey K.E., Teismann H., Teumer A., Thompson R.C., Thompson W., Thomson P.A., Thorgeirsson T.E., Traylor M., Treutlein J., Uitterlinden A.G., Umbricht D., Vedder H., Viktorin A., Visscher P.M., Wang W., Watson S.J., Webb B.T., Weickert C.S., Weickert T.W., Weinsheimer S.M., Wellmann J., Willemsen G., Witt S.H., Wu Y., Xi H.S., Xu W., Yang J., Young A.H., Zandi P., Zhang P., Zhang F., Zollner S., Adolfsson R., Agartz I., Alda M., Arolt V., Backlund L., Baune B.T., Bellivier F., Berger K., Berrettini W.H., Biernacka J.M., Blackwood D.H.R., Boehnke M., Boomsma D.I., Corvin A., Craddock N., Daly M.J., Dannlowski U., Domenici E., Domschke K., Esko T., Etain B., Frye M., Fullerton J.M., Gershon E.S., de Geus E.J.C., Gill M., Goes F., Grabe H.J., Grigoroiu-Serbanescu M., Hamilton S.P., Hauser J., Hayward C., Heath A.C., Hougaard D.M., Hultman C.M., Jones I., Jones L.A., Kahn R.S., Kendler K.S., Kirov G., Kloiber S., Landen M., Leboyer M., Lewis G., Li Q.S., Lissowska J., Lucae S., Madden P.A.F., Magnusson P.K., Martin N.G., Mayoral F., McElroy S.L., McIntosh A.M., McMahon F.J., Melle I., Metspalu A., Mitchell P.B., Morken G., Mors O., Mortensen P.B., Muller-Myhsok B., Myers R.M., Neale B.M., Nimgaonkar V., Nordentoft M., Nothen M.M., O'Donovan M.C., Oedegaard K.J., Owen M.J., Paciga S.A., Pato C., Pato M.T., Pedersen N.L., Penninx B.W.J.H., Perlis R.H., Porteous D.J., Posthuma D., Potash J.B., Preisig M., Ramos-Quiroga J.A., Ribases M., Rietschel M., Rouleau G.A., Schaefer C., Schalling M., Schofield P.R., Schulze T.G., Serretti A., Smoller J.W., Stefansson H., Stefansson K., Stordal E., Tiemeier H., Turecki G., Uher R., Vaaler A.E., Vieta E., Vincent J.B., Volzke H., Weissman M.M., Werge T., Andreassen O.A., Borglum A.D., Cichon S., Edenberg H.J., Di Florio A., Kelsoe J., Levinson D.F., Lewis C.M., Nurnberger J.I., Ophoff R.A., Scott L.J., Sklar P., Sullivan P.F., Wray N.R., and Breen G.

Subjects
0301 basic medicine, Netherlands Twin Register (NTR), Genetic correlation, Genome-wide association study, Mood Disorder, Bipolar disorder, Population, BF, Genomics, Major depressive disorder, Affective disorder, Article, Mice, 03 medical and health sciences, 0302 clinical medicine, Risk Factors, mental disorders, medicine, Animals, ddc:610, education, Depression (differential diagnoses), Biological Psychiatry, 030304 developmental biology, Genetic association, Genetics, Depressive Disorder, Major, 0303 health sciences, education.field_of_study, Animal, business.industry, Risk Factor, medicine.disease, 3. Good health, Affective disorders, 030104 developmental biology, Mood, Mood disorders, RC0321, Biological psychiatry, business, 030217 neurology & neurosurgery, Clinical psychology
Abstract

BackgroundMood disorders (including major depressive disorder and bipolar disorder) affect 10-20% of the population. They range from brief, mild episodes to severe, incapacitating conditions that markedly impact lives. Despite their diagnostic distinction, multiple approaches have shown considerable sharing of risk factors across the mood disorders.MethodsTo clarify their shared molecular genetic basis, and to highlight disorder-specific associations, we meta-analysed data from the latest Psychiatric Genomics Consortium (PGC) genome-wide association studies of major depression (including data from 23andMe) and bipolar disorder, and an additional major depressive disorder cohort from UK Biobank (total: 185,285 cases, 439,741 controls; non-overlapping N = 609,424).ResultsSeventy-three loci reached genome-wide significance in the meta-analysis, including 15 that are novel for mood disorders. More genome-wide significant loci from the PGC analysis of major depression than bipolar disorder reached genome-wide significance. Genetic correlations revealed that type 2 bipolar disorder correlates strongly with recurrent and single episode major depressive disorder. Systems biology analyses highlight both similarities and differences between the mood disorders, particularly in the mouse brain cell types implicated by the expression patterns of associated genes. The mood disorders also differ in their genetic correlation with educational attainment – positive in bipolar disorder but negative in major depressive disorder.ConclusionsThe mood disorders share several genetic associations, and can be combined effectively to increase variant discovery. However, we demonstrate several differences between these disorders. Analysing subtypes of major depressive disorder and bipolar disorder provides evidence for a genetic mood disorders spectrum.

Published
2020

30. Fully absorbable poly-4-hydroxybutyrate implants exhibit more favorable cell-matrix interactions than polypropylene

Author

Theo H. Smit, Jan-Paul Roovers, Chantal M. Diedrich, Zeliha Guler, Graduate School, ARD - Amsterdam Reproduction and Development, Obstetrics and Gynaecology, Medical Biology, AMS - Tissue Function & Regeneration, Reproductive Biology Laboratory, and APH - Aging & Later Life

Subjects
Poly-4-hydroxybutyrate, Scaffold, Materials science, Fully absorbable, Hydroxybutyrates, Bioengineering, 02 engineering and technology, Matrix (biology), Vaginal fibroblast, 010402 general chemistry, Polypropylenes, 01 natural sciences, Pelvic Organ Prolapse, Biomaterials, Extracellular matrix, chemistry.chemical_compound, Mechanical strength, Absorbable Implants, medicine, Humans, Fibroblast, Polypropylene, Implant, Surgical Mesh, 021001 nanoscience & nanotechnology, Biocompatible material, 0104 chemical sciences, Extracellular Matrix, medicine.anatomical_structure, chemistry, Mechanics of Materials, Female, 0210 nano-technology, Biomedical engineering
Abstract

Pelvic organ prolapse (POP) is a multifactorial condition characterized by the descent of the pelvic organs due to the loss of supportive tissue strength. This is presumably caused by the decreased fibroblast function and the subsequent change in the quality of the extracellular matrix. The correction of POP using an implant intends to provide mechanical support to the pelvic organs and to stimulate a moderate host response. Synthetic polypropylene (PP) implants were commonly used for the correction of prolapse. Although they were successful in providing support, these implants have been associated with clinical complications in the long term due to substantial foreign body response and inappropriate tissue integration. The complications can be avoided or minimized by engineering a biocompatible and fully absorbable implant with optimized mechanical and structural characteristics that favor more appropriate cellular interactions with the implant. Therefore, in this study, we evaluated implants comprised of poly-4-hydroxybutyrate (P4HB), a fully absorbable material with high mechanical strength, as an alternative to PP. The P4HB implants were knitted in four unique designs with different pore shapes ranging from a more rectangular geometry- as it is in PP implant- to a rounded geometry, to determine the effect of the implant structure on the textural and mechanical properties and subsequent cell-matrix interaction. The cellular response was investigated by seeding primary vaginal fibroblasts isolated from patients with POP. P4HB favored cellular functions more than PP, as indicated by greater cell attachment and proliferation (P < 0.01), and significantly more collagen deposition (P4HB vs PP, 11.19 μg vs 6.67 μg) at 28 days culture (P < 0.05). All P4HB implants had higher strength and lower stiffness than the PP scaffold. The material and the design of the implant also influenced the behavior of vaginal fibroblasts. The aspect ratio of the vaginal POP fibroblasts cultured on the PP implant (1.61 ± 0.75) was significantly (P < 0.005) smaller than those cultured on P4HB implants (average 2.31 ± 0.09). The P4HB structure with rounded pores showed the lowest stiffness and highest fibroblast attachment and proliferation (P < 0.01). Overall, P4HB induces more matrix deposition compared to PP and knit design can further optimize cell behavior.

Published
2020

31. Adolescent idiopathic scoliosis: The mechanobiology of differential growth

Author

Theo H. Smit, Medical Biology, AMS - Tissue Function & Regeneration, and ARD - Amsterdam Reproduction and Development

Subjects
business.industry, Intervertebral disc, Idiopathic scoliosis, Anatomy, Hueter‐Volkmann law, Compression (physics), notochordal cells, Mechanobiology, medicine.anatomical_structure, Perspective, adolescent idiopathic scoliosis, tensegrity, medicine, Posterior longitudinal ligament, intervertebral disc, Orthopedics and Sports Medicine, Structural deformation, business, differential growth, Differential growth, Intradiscal pressure
Abstract

Adolescent idiopathic scoliosis (AIS) has been linked to neurological, genetic, hormonal, microbial, and environmental cues. Physically, however, AIS is a structural deformation, hence an adequate theory of etiology must provide an explanation for the forces involved. Earlier, we proposed differential growth as a possible mechanism for the slow, three‐dimensional deformations observed in AIS. In the current perspective paper, the underlying mechanobiology of cells and tissues is explored. The musculoskeletal system is presented as a tensegrity‐like structure, in which the skeletal compressive elements are stabilized by tensile muscles, ligaments, and fasciae. The upright posture of the human spine requires minimal muscular energy, resulting in less compression, and stability than in quadrupeds. Following Hueter‐Volkmann Law, less compression allows for faster growth of vertebrae and intervertebral discs. The substantially larger intervertebral disc height observed in AIS patients suggests high intradiscal pressure, a condition favorable for notochordal cells; this promotes the production of proteoglycans and thereby osmotic pressure. Intradiscal pressure overstrains annulus fibrosus and longitudinal ligaments, which are then no longer able to remodel and grow, and consequently induce differential growth. Intradiscal pressure thus is proposed as the driver of AIS and may therefore be a promising target for prevention and treatment., Differential growth has been suggested as a physical mechanism for spinal deformations in Adolescent Idiopathic Scoliosis. Here, the underlying mechanobiological mechanisms are explored and it appears that high intradiscal pressure may be responsible for overstraining the annulus fibrosus and longitudinal ligaments, thereby inducing differential growth.

Published
2020

32. A methylation study of long-term depression risk

Author

Karolina A. Aberg, Min Zhao, Andrey A. Shabalin, Johannes H. Smit, Gerard van Grootheest, Lin Ying Xie, Rick Jansen, Yuri Milaneschi, Robin F. Chan, Brenda W.J.H. Penninx, Shaunna L. Clark, Laura K.M. Han, Mohammad W. Hattab, Edwin J. C. G. van den Oord, Psychiatry, Amsterdam Neuroscience - Mood, Anxiety, Psychosis, Stress & Sleep, APH - Mental Health, APH - Methodology, and APH - Digital Health

Subjects
0301 basic medicine, Oncology, medicine.medical_specialty, Genome-wide association study, Article, 03 medical and health sciences, Cellular and Molecular Neuroscience, 0302 clinical medicine, Internal medicine, medicine, Humans, Genetic Predisposition to Disease, Molecular Biology, Disease burden, Autoimmune disease, Depressive Disorder, Major, Framingham Risk Score, business.industry, Depression, Brain, Methylation, DNA Methylation, medicine.disease, Psychiatry and Mental health, 030104 developmental biology, DNA methylation, Multiple comparisons problem, Chronic Disease, Major depressive disorder, CpG Islands, Disease Susceptibility, business, 030217 neurology & neurosurgery, Genome-Wide Association Study
Abstract

Recurrent and chronic major depressive disorder (MDD) accounts for a substantial part of the disease burden because this course is most prevalent and typically requires long-term treatment. We associated blood DNA methylation profiles from 581 MDD patients at baseline with MDD status 6 years later. A resampling approach showed a highly significant association between methylation profiles in blood at baseline and future disease status (P = 2.0 × 10−16). Top MWAS results were enriched specific pathways, overlapped with genes found in GWAS of MDD disease status, autoimmune disease and inflammation, and co-localized with eQTLS and (genic enhancers of) of transcription sites in brain and blood. Many of these findings remained significant after correction for multiple testing. The major themes emerging were cellular responses to stress and signaling mechanisms linked to immune cell migration and inflammation. This suggests that an immune signature of treatment-resistant depression is already present at baseline. We also created a methylation risk score (MRS) to predict MDD status 6 years later. The AUC of our MRS was 0.724 and higher than risk scores created using a set of five putative MDD biomarkers, genome-wide SNP data, and 27 clinical, demographic and lifestyle variables. Although further studies are needed to examine the generalizability to different patient populations, these results suggest that methylation profiles in blood may present a promising avenue to support clinical decision making by providing empirical information about the likelihood MDD is chronic or will recur in the future.

Published
2020

33. Somite Division and New Boundary Formation by Mechanical Strain

Author

Manuel Schmitz, Hannan Tahir, Theo H. Smit, Ben K.A. Nelemans, Roeland M. H. Merks, Centrum Wiskunde & Informatica, Amsterdam (CWI), The Netherlands, Medical Biology, AMS - Restoration & Development, AMS - Amsterdam Movement Sciences, ARD - Amsterdam Reproduction and Development, and AMS - Tissue Function & Regeneration

Subjects
0301 basic medicine, Multidisciplinary, Strain (chemistry), Chemistry, Cellular differentiation, Cellular Potts model, Mechanical Modeling, Embryo, 02 engineering and technology, 021001 nanoscience & nanotechnology, Poultry Embryology, Embryonic stem cell, Article, Cell biology, 03 medical and health sciences, Somite, 030104 developmental biology, medicine.anatomical_structure, Somitogenesis, medicine, lcsh:Q, 0210 nano-technology, lcsh:Science, Developmental biology, Developmental Biology
Abstract

Summary Somitogenesis, the primary segmentation of the vertebrate embryo, is associated with oscillating genes that interact with a wave of cell differentiation. The necessity of cell-matrix adherence and embryonic tension, however, suggests that mechanical cues are also involved. To explicitly investigate this, we applied surplus axial strain to live chick embryos. Despite substantial deformations, the embryos developed normally and somite formation rate was unaffected. Surprisingly, however, we observed slow cellular reorganizations of the most elongated somites into two or more well-shaped daughter somites. In what appeared to be a regular process of boundary formation, somites divided and fibronectin was deposited in between. Cell counts and morphology indicated that cells from the somitocoel underwent mesenchymal-epithelial transition; this was supported by a Cellular Potts model of somite division. Thus, although somitogenesis appeared to be extremely robust, we observed new boundary formation in existing somites and conclude that mechanical strain can be morphologically instructive., Graphical Abstract, Highlights • Live chick embryos develop normally under substantial axial strain (>50%) • Mature somites divide into daughter somites, and fibronectin is deposited in between • Mesenchymal cells from the somitocoel transition into epithelial border cells • Mechanical strain can induce border formation and thus affect morphogenesis, Poultry Embryology; Mechanical Modeling; Developmental Biology

Published
2020

34. In vivocharacterization of chick embryo mesoderm by optical coherence tomography assisted microindentation

Author

Davide Iannuzzi, Ben K.A. Nelemans, Nelda Antonovaite, Theo H. Smit, Ariana Ahmadzada, and Marica Marrese

Subjects
0303 health sciences, Mesoderm, animal structures, Materials science, medicine.diagnostic_test, 030302 biochemistry & molecular biology, Morphogenesis, Embryo, 03 medical and health sciences, Somite, medicine.anatomical_structure, Optical coherence tomography, In vivo, embryonic structures, medicine, Paraxial mesoderm, Biophysics, Process (anatomy), 030304 developmental biology
Abstract

Embryos are growing organisms with highly heterogeneous properties in space and time. Understanding the mechanical properties is a crucial prerequisite for the investigation of morphogenesis. During the last ten years, new techniques have been developed to evaluate the mechanical properties of biological tissuesin vivo. To address this need, we employed a new instrument that, via the combination of micro-indentation with Optical Coherence Tomography (OCT), allows us to determine both, the spatial distribution of mechanical properties of chick embryos and the structural changes in real-time provided by OCT. We report here the stiffness measurements on live chicken mesoderm during somite formation, from the mesenchymal tailbud to the epithelialized somites. The storage modulus of the mesoderm increases from (176±18) Pa in the tail up to (716±117) Pa in the somitic region. The midline has a storage modulus of (947±111) Pa in the caudal presomitic mesoderm, indicating a stiff rod along the body axis, which thereby mechanically supports the surrounding tissue. The difference in stiffness between midline and presomitic mesoderm decreases as the mesoderm forms somites. The viscoelastic response of the somites develops further until somite IV, which is commensurate with the slow process of epithelization of somites between S0 and SIV.Overall, this study provides an efficient method for the biomechanical characterization of soft biological tissuesin vivoand shows that the mechanical properties strongly relate to different morphological features of the investigated regions.

Published
2020

35. Experienced Burden of and Adherence to Smartphone-Based Ecological Momentary Assessment in Persons with Affective Disorders

Author

Robert A. Schoevers, Heleen Riper, Brenda W.J.H. Penninx, Claire van Genugten, Johannes H Smit, Harriëtte Riese, Femke Lamers, Josien Schuurmans, Clinical Psychology, APH - Global Health, APH - Mental Health, Psychiatry, Amsterdam Neuroscience - Mood, Anxiety, Psychosis, Stress & Sleep, APH - Digital Health, APH - Methodology, Interdisciplinary Centre Psychopathology and Emotion regulation (ICPE), Perceptual and Cognitive Neuroscience (PCN), and Clinical Cognitive Neuropsychiatry Research Program (CCNP)

Subjects
DYNAMICS, 050103 clinical psychology, MOOD DISORDERS, affective disorders, depression, anxiety disorders, ecological momentary assessment, burden, adherence, Psychological intervention, lcsh:Medicine, Burden, Article, 03 medical and health sciences, 0302 clinical medicine, medicine, ANXIETY, 0501 psychology and cognitive sciences, Ecological momentary assessment, Depression (differential diagnoses), High rate, Ecology, business.industry, Depression, 05 social sciences, lcsh:R, General Medicine, medicine.disease, 3. Good health, 030227 psychiatry, Affective disorders, Mood disorders, Adherence, Anxiety, medicine.symptom, business, INTERVENTIONS, Anxiety disorders
Abstract

(1) Background: The use of smartphone-based ecological momentary assessment (EMA) questionnaires in affective disorder research has rapidly increased. Though, a thorough understanding of experienced burden of and adherence to EMA is crucial in determining the usefulness of EMA. (2) Methods: Persons with current affective disorders (n = 100), remitted persons (n = 190), and healthy controls (n = 94) participated in a smartphone-based EMA two-week monitoring period. Our primary outcomes were (momentary) perceived burden of and adherence to EMA. (3) Results: In the whole sample, lower positive and higher negative affect were associated with slightly higher levels of perceived momentary burden (B = −0.23 [95%CI = −0.27−0.19], B = 0.30 [95%CI = 0.24−0.37], respectively). The persons with current affective disorders reported slightly higher levels of experienced momentary burden (Mdn = 1.98 [IQR = 1.28−2.57]), than the remitted persons (Mdn = 1.64 [IQR = 1.11−2.24]) and healthy controls (Mdn = 1.28 [IQR = 1.04−1.92]). Nevertheless, the persons with current affective disorders still showed very high adherence rates (Mdn = 94.3% [IQR = 87.9−97.1]), at rates on a par with the remitted persons (Mdn = 94.3% [IQR = 90.0−97.1]) and healthy controls (Mdn = 94.3% [IQR = 90.0−98.6]). (4) Discussion: Frequent momentary questionnaires of mental well-being are slightly more burdensome to the persons with current affective disorders, but this does not seem to have a negative impact on adherence. Their high rate of adherence to EMA—which was similar to that in remitted persons and healthy controls —suggests that it is feasible to apply (short-duration) EMA.

Published
2020
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36. An in vitro model to evaluate the properties of matrices produced by fibroblasts from osteogenesis imperfecta and Ehlers-Danlos Syndrome patients

Author

Dimitra Micha, Theo H. Smit, G. Pals, Samaneh Ghazanfari, Medical Biology, AMS - Restoration & Development, Amsterdam Reproduction & Development (AR&D), AMS - Tissue Function & Regeneration, RS: FSE AMIBM, AMIBM, Biobased Materials, RS: FSE Biobased Materials, Sciences, RS: FSE Sciences, Human genetics, Amsterdam Movement Sciences - Restoration and Development, Orthopedic Surgery and Sports Medicine, ACS - Microcirculation, and ACS - Atherosclerosis & ischemic syndromes

Subjects
0301 basic medicine, Male, Cell, Cell Culture Techniques, medicine.disease_cause, Biochemistry, Glycosaminoglycan, Extracellular matrix, 0302 clinical medicine, Collagen anisotropy, HETEROGENEITY, Cells, Cultured, Glycosaminoglycans, Mutation, Procollagen-Lysine, 2-Oxoglutarate 5-Dioxygenase, GLYCINE, medicine.anatomical_structure, Osteogenesis imperfecta, 030220 oncology & carcinogenesis, Female, Collagen, Haploinsufficiency, In vitro disease model, Adult, medicine.medical_specialty, Biophysics, Collagen Type I, 03 medical and health sciences, Internal medicine, medicine, Humans, Molecular Biology, business.industry, MUTATIONS, Cell Biology, Fibroblasts, medicine.disease, Ascorbic acid, Collagen Type I, alpha 1 Chain, 030104 developmental biology, Endocrinology, Ehlers–Danlos syndrome, Case-Control Studies, Anisotropy, business, Ehlers-Danlos syndrome, SKIN
Abstract

Aim of the study Osteogenesis imperfecta and Ehlers Danlos syndrome are hereditary disorders caused primarily by defective collagen regulation. Osteogenesis imperfecta patients were divided to haploinsufficient and dominant negative depending on the effect of COL1A1 and COL1A2 mutations whereas Ehlers Danlos syndrome patients had a mutation in PLOD1. Although collagen abnormalities have been extensively studied in monolayer cultures, there are no reports about 3D in vitro models which may reflect more accurately the dynamic cell environment. This is the first study presenting the structural and mechanical characterization of a 3D cell-secreted model using primary patient fibroblasts. Materials and methods Fibroblasts from patients with osteogenesis imperfecta and Ehlers Danlos syndrome were cultured with ascorbic acid for 5 weeks. The effect of mutations on cytosolic and secreted collagen was tested by electrophoresis following incubation with radiolabeled 14C proline. Extracellular matrix was studied in terms of collagen fiber orientation, stiffness, as well as glycosaminoglycan and collagen content. Results and conclusions Osteogenesis imperfecta patients with haploinsufficient mutations had higher percentage of anisotropic collagen fibers alignment compared to other patient groups; all patients had a lower percentage of anisotropic samples compared to healthy controls. This correlated with higher average stiffness in the control group. Glycosaminoglycan content was lower in the control and haploinsufficient groups. In cells with PLOD1 mutations, there were no differences in PLOD2 expression. This proof of concept study was able to show differences in collagen fiber orientation between different patient groups which can potentially pave the way towards the development of 3D models aiming at improved investigation of disease mechanisms.

Published
2020

37. Tailored implementation of internet-based cognitive behavioural therapy in the multinational context of the ImpleMentAll project: a study protocol for a stepped wedge cluster randomized trial

Author

Juliane Hug, Mette Maria Skjøth, Arlinda Cerga-Pashoja, Alison L. Calear, Heleen Riper, Annet Kleiboer, Christiaan Vis, Philip J. Batterham, Denise Hanssen, Claire van Genugten, Sebastian Potthoff, David Daniel Ebert, Helen Christensen, Ingrid Titzler, Judith G. M. Rosmalen, Carl May, Josien Schuurmans, Margot Fleuren, Sevim Mustafa, Tim Rapley, Jeroen Ruwaard, Johannes H Smit, Catherine Pope, Erik Van der Eycken, Isabel Zbukvic, Tracy Finch, Kim Mathiasen, Gentiana Qirjako, Jordi Piera-Jimenez, Bruno Aouizerate, Anne Etzelmüller, Leah Bührmann, Enrico Zanalda, Naim Fanaj, Claus Duedal Pedersen, Kristine Hæstrup Hindkjær Tarp, Ludovic Samalin, Ylenia Sacco, Ulrich Hegerl, Caroline Oehler, Psychiatry, APH - Mental Health, APH - Global Health, Clinical Psychology, World Health Organization (WHO) Collaborating Center, APH - Personalized Medicine, and Interdisciplinary Centre Psychopathology and Emotion regulation (ICPE)

Subjects
Mental Health Services, Tailored implementation, Psychological intervention, Medicine (miscellaneous), Context (language use), Stepped wedge trial design, Internet-delivered Cognitive Behavioural Therapy, B800, 03 medical and health sciences, Study Protocol, SDG 17 - Partnerships for the Goals, 0302 clinical medicine, eHealth, iCBT, media_common.cataloged_instance, Medicine, Humans, Pharmacology (medical), 030212 general & internal medicine, Cluster randomised controlled trial, Determinants of practice, ddc:610, European union, media_common, Randomized Controlled Trials as Topic, Protocol (science), Medical education, Internet, lcsh:R5-920, SWT, Cognitive Behavioral Therapy, business.industry, Australia, Service provider, Mental health, C800, Europe, Normalization, business, lcsh:Medicine (General), 030217 neurology & neurosurgery, Implementation strategies
Abstract

Background Internet-based Cognitive Behavioural Therapy (iCBT) is found effective in treating common mental disorders. However, the use of these interventions in routine care is limited. The international ImpleMentAll study is funded by the European Union’s Horizon 2020 programme. It is concerned with studying and improving methods for implementing evidence-based iCBT services for common mental disorders in routine mental health care. A digitally accessible implementation toolkit (ItFits-toolkit) will be introduced to mental health care organizations with the aim to facilitate the ongoing implementation of iCBT services within local contexts. This study investigates the effectiveness of the ItFits-toolkit by comparing it to implementation-as-usual activities. Methods A stepped wedge cluster randomized controlled trial (SWT) design will be applied. Over a trial period of 30 months, the ItFits-toolkit will be introduced sequentially in twelve routine mental health care organizations in primary and specialist care across nine countries in Europe and Australia. Repeated measures are applied to assess change over time in the outcome variables. The effectiveness of the ItFits-toolkit will be assessed in terms of the degree of normalization of the use of the iCBT services. Several exploratory outcomes including uptake of the iCBT services will be measured to feed the interpretation of the primary outcome. Data will be collected via a centralized data collection system and analysed using generalized linear mixed modelling. A qualitative process evaluation of routine implementation activities and the use of the ItFits-toolkit will be conducted within this study. Discussion The ImpleMentAll study is a large-scale international research project designed to study the effectiveness of tailored implementation. Using a SWT design that allows to examine change over time, this study will investigate the effect of tailored implementation on the normalization of the use of iCBT services and their uptake. It will provide a better understanding of the process and methods of tailoring implementation strategies. If found effective, the ItFits-toolkit will be made accessible for mental health care service providers, to help them overcome their context-specific implementation challenges. Trial registration ClinicalTrials.gov NCT03652883. Retrospectively registered on 29 August 2018

Published
2020

38. Does Childhood Trauma Moderate Polygenic Risk for Depression?

Author

Wouter J. Peyrot, Sandra Van der Auwera, Yuri Milaneschi, Conor V. Dolan, Pamela A.F. Madden, Patrick F. Sullivan, Jana Strohmaier, Stephan Ripke, Marcella Rietschel, Michel G. Nivard, Niamh Mullins, Grant W. Montgomery, Anjali K. Henders, Andrew C. Heat, Helen L. Fisher, Erin C. Dunn, Enda M. Byrne, Tracy A. Air, Bernhard T. Baune, Gerome Breen, Douglas F. Levinson, Cathryn M. Lewis, Nick G. Martin, Elliot N. Nelson, Dorret I. Boomsma, Hans J. Grabe, Naomi R. Wray, Brenda W.J.H. Penninx, Manuel Mattheisen, Maciej Trzaskowski, Abdel Abdellaoui, Mark J. Adams, Esben Agerbo, Tracy M. Air, Till F.M. Andlauer, Silviu-Alin Bacanu, Marie Bækvad-Hansen, Aartjan T.F. Beekman, Tim B. Bigdeli, Elisabeth B. Binder, Douglas H.R. Blackwood, Julien Bryois, Henriette N. Buttenschøn, Jonas Bybjerg-Grauholm, Na Cai, Enrique Castelao, Jane Hvarregaard Christensen, Toni-Kim Clarke, Jonathan R.I. Coleman, Lucía Colodro-Conde, Baptiste Couvy-Duchesne, Nick Craddock, Gregory E. Crawford, Gail Davies, Ian J. Deary, Franziska Degenhardt, Eske M. Derks, Nese Direk, Thalia C. Eley, Valentina Escott-Price, null Farnush, Farhadi Hassan Kiadeh, Hilary K. Finucane, Andreas J. Forstner, Josef Frank, Héléna A. Gaspar, Michael Gill, Fernando S. Goes, Scott D. Gordon, Jakob Grove, Lynsey S. Hall, Christine Søholm Hansen, Thomas F. Hansen, Stefan Herms, Ian B. Hicki, Per Hoffmann, Georg Homuth, Carsten Horn, Jouke-Jan Hottenga, David M. Hougaard, Marcus Ising, Rick Jansen, Eric Jorgenson, James A. Knowles, Isaac S. Kohane, Julia Kraft, Warren W. Kretzschmar, Jesper Krogh, Zoltán Kutalik, Yihan Li, Penelope A. Lind, Donald J. MacIntyre, Dean F. MacKinnon, Robert M. Maier, Wolfgang Maier, Jonathan Marchini, Hamdi Mbarek, Patrick McGrath, Peter McGuffin, Sarah E. Medland, Divya Mehta, Christel M. Middeldorp, Evelin Mihailov, Lili Milani, Francis M. Mondimore, Sara Mostafavi, Matthias Nauck, Bernard Ng, Dale R. Nyholt, Paul F. O’Reilly, Hogni Oskarsson, Michael J. Owen, Jodie N. Painter, Carsten Bøcker Pedersen, Marianne Giørtz Pedersen, Roseann E. Peterson, Erik Pettersson, Giorgio Pistis, Danielle Posthuma, Jorge A. Quiroz, Per Qvist, John P. Rice, Brien P. Riley, Margarita Rivera, Saira Saeed Mirza, Robert Schoevers, Eva C. Schulte, Ling Shen, Jianxin Shi, Stanley I. Shyn, Engilbert Sigurdsson, Grant C.B. Sinnamon, Johannes H. Smit, Daniel J. Smith, Hreinn Stefansson, Stacy Steinberg, Fabian Streit, Katherine E. Tansey, Henning Teismann, Alexander Teumer, Wesley Thompson, Pippa A. Thomson, Thorgeir E. Thorgeirsson, Matthew Traylor, Jens Treutlein, Vassily Trubetskoy, André G. Uitterlinden, Daniel Umbricht, Albert M. van Hemert, Alexander Viktorin, Peter M. Visscher, Yunpeng Wang, Bradley T. Webb, Shantel Marie Weinsheimer, Jürgen Wellmann, Gonneke Willemsen, Stephanie H. Witt, Yang Wu, Hualin S. Xi, Jian Yang, Futao Zhang, Volker Arolt, Klaus Berger, Sven Cichon, Udo Dannlowski, E.J.C. de Geus, J. Raymond DePaulo, Enrico Domenici, Katharina Domschke, Tõnu Esko, Steven P. Hamilton, Caroline Hayward, Andrew C. Heath, Kenneth S. Kendler, Stefan Kloiber, Glyn Lewis, Qingqin S. Li, Susanne Lucae, Patrik K. Magnusson, Nicholas G. Martin, Andrew M. McIntosh, Andres Metspalu, Ole Mors, Preben Bo Mortensen, Bertram Müller-Myhsok, Merete Nordentoft, Markus M. Nöthen, Michael C. O'Donovan, Sara A. Paciga, Nancy L. Pedersen, Roy H. Perlis, David J. Porteous, James B. Potash, Martin Preisig, Catherine Schaefer, Thomas G. Schulze, Jordan W. Smoller, Kari Stefansson, Henning Tiemeier, Rudolf Uher, Henry Völzke, Myrna M. Weissman, Thomas Werge, Anders D. Børglum, Biological Psychology, APH - Methodology, Amsterdam Neuroscience - Mood, Anxiety, Psychosis, Stress & Sleep, APH - Mental Health, APH - Health Behaviors & Chronic Diseases, APH - Personalized Medicine, Adult Psychiatry, ARD - Amsterdam Reproduction and Development, Epidemiology, Urology, Child and Adolescent Psychiatry / Psychology, Internal Medicine, Medical Informatics, Immunology, Psychiatry, Amsterdam Reproduction & Development (AR&D), Human genetics, Epidemiology and Data Science, and APH - Digital Health

Subjects
0301 basic medicine, Child abuse, Adult, Male, Netherlands Twin Register (NTR), medicine.medical_specialty, Multifactorial Inheritance, polygenic risk, SDG 16 - Peace, interaction, Risk Assessment, 03 medical and health sciences, 0302 clinical medicine, Risk Factors, mental disorders, medicine, Journal Article, Humans, genetics, Genetic Predisposition to Disease, Child Abuse, Psychiatry, Child, Biological Psychiatry, Psychiatric Status Rating Scales, Depressive Disorder, Major, childhood trauma, Genetic heterogeneity, Depression, Adult Survivors of Child Abuse, SDG 16 - Peace, Justice and Strong Institutions, Case-control study, Odds ratio, medicine.disease, Justice and Strong Institutions, meta-analysis, 030104 developmental biology, Physical abuse, Logistic Models, 5-HTTLPR, Meta-analysis, Case-Control Studies, Major depressive disorder, Female, Gene-Environment Interaction, Psychology, 030217 neurology & neurosurgery
Abstract

BackgroundThe heterogeneity of genetic effects on major depressive disorder (MDD) may be partly attributable to moderation of genetic effects by environment, such as exposure to childhood trauma (CT). Indeed, previous findings in two independent cohorts showed evidence for interaction between polygenic risk scores (PRSs) and CT, albeit in opposing directions. This study aims to meta-analyze MDD-PRS × CT interaction results across these two and other cohorts, while applying more accurate PRSs based on a larger discovery sample.MethodsData were combined from 3024 MDD cases and 2741 control subjects from nine cohorts contributing to the MDD Working Group of the Psychiatric Genomics Consortium. MDD-PRS were based on a discovery sample of ∼110,000 independent individuals. CT was assessed as exposure to sexual or physical abuse during childhood. In a subset of 1957 cases and 2002 control subjects, a more detailed five-domain measure additionally included emotional abuse, physical neglect, and emotional neglect.ResultsMDD was associated with the MDD-PRS (odds ratio [OR] = 1.24, p = 3.6 × 10-5, R2 = 1.18%) and with CT (OR = 2.63, p = 3.5 × 10-18 and OR = 2.62, p = 1.4 ×10-5 for the two- and five-domain measures, respectively). No interaction was found between MDD-PRS and the two-domain and five-domain CT measure (OR = 1.00, p = .89 and OR = 1.05, p = .66).ConclusionsNo meta-analytic evidence for interaction between MDD-PRS and CT was found. This suggests that the previously reported interaction effects, although both statistically significant, can best be interpreted as chance findings. Further research is required, but this study suggests that the genetic heterogeneity of MDD is not attributable to genome-wide moderation of genetic effects by CT.

Published
2018

39. Behind the scenes of online therapeutic feedback in blended therapy for depression

Author

Anneke van Schaik, Johannes H. Smit, Mayke Mol, Simon Provoost, Els Dozeman, Heleen Riper, Psychiatry, APH - Mental Health, APH - Global Health, APH - Methodology, and Clinical Psychology

Subjects
Adult, Male, 050103 clinical psychology, Psychotherapist, 020205 medical informatics, medicine.medical_treatment, Health Informatics, Context (language use), Depression/therapy, 02 engineering and technology, Internet/instrumentation, behavioral disciplines and activities, Session (web analytics), Feedback, 0202 electrical engineering, electronic engineering, information engineering, medicine, eHealth, Humans, 0501 psychology and cognitive sciences, Depression (differential diagnoses), Internet, Original Paper, EHealth, Depression, Depressive disorder, 05 social sciences, Cognition, Middle Aged, Checklist, Readability, Cognitive behavioral therapy, Female, Psychology
Abstract

Background: In Internet-delivered cognitive behavioral therapies (iCBT), written feedback by therapists is a substantial part of therapy. However, it is not yet known how this feedback should be given best and which specific therapist behaviors and content are most beneficial for patients. General instructions for written feedback are available, but the uptake and effectiveness of these instructions in iCBT have not been studied yet. Objective: This study aimed to identify therapist behaviors in written online communication with patients in blended CBT for adult depression in routine secondary mental health care, to identify the extent to which the therapists adhere to feedback instructions, and to explore whether therapist behaviors and adherence to feedback instructions are associated with patient outcome. Methods: Adults receiving blended CBT (10 online sessions in combination with 5 face-to-face sessions) for depression in routine mental health care were recruited in the context of the European implementation project MasterMind. A qualitative content analysis was used to identify therapist behaviors in online written feedback messages, and a checklist for the feedback instruction adherence of the therapists was developed. Correlations were explored between the therapist behaviors, therapist instruction adherence, and patient outcomes (number of completed online sessions and symptom change scores). Results: A total of 45 patients (73%, 33/45 female, mean age 35.9 years) received 219 feedback messages given by 19 therapists (84%, 16/19 female). The most frequently used therapist behaviors were informing, encouraging, and affirming. However, these were not related to patient outcomes. Although infrequently used, confronting was positively correlated with session completion (ρ=.342, P=.02). Therapists adhered to most of the feedback instructions. Only 2 feedback aspects were correlated with session completion: the more therapists adhere to instructions containing structure (limiting to 2 subjects and sending feedback within 3 working days) and readability (short sentences and short paragraphs), the less online sessions were completed (ρ=−.340, P=.02 and ρ=−.361, P=.02, respectively). No associations were found with depression symptom change scores. Conclusions: The therapist behaviors found in this study are comparable to previous research. The findings suggest that online feedback instructions for therapists provide sufficient guidance to communicate in a supportive and positive manner with patients. However, the instructions might be improved by adding more therapeutic techniques besides the focus on style and form.

Published
2018

40. Genome-wide association analyses identify 44 risk variants and refine the genetic architecture of major depression

Author

Jens Treutlein, James B. Potash, Cheynna A. Crowley, Paul F. O'Reilly, Francis M. Mondimore, Nicholas G. Martin, Jodie N. Painter, Qingqin S. Li, Tõnu Esko, Michael Conlon O'Donovan, Markus M. Nöthen, Toni-Kim Clarke, Roseann E. Peterson, Shantel Weinsheimer, Naomi R. Wray, Marie Bækvad-Hansen, Pamela F.A. Madden, Johannes H. Smit, Gonneke Willemsen, Thomas Hansen, Andrew C. Heath, Carsten Horn, Udo Dannlowski, Fulai Jin, Robert A. Schoevers, Jian Yang, Nicholas Eriksson, Marianne Giørtz Pedersen, Patrik K. E. Magnusson, Hans J. Grabe, Michael Gill, Lili Milani, Caroline Hayward, Shaun Purcell, Stanley I. Shyn, Penelope A. Lind, Giorgio Pistis, Michel G. Nivard, Thorgeir E. Thorgeirsson, Abdel Abdellaoui, Andres Metspalu, David J. Porteous, Anders D. Børglum, Christine Søholm Hansen, Scott D. Gordon, Nicholas John Craddock, Susanne Lucae, Douglas Blackwood, Jürgen Wellmann, Till M.F. Andlauer, Wesley K. Thompson, Chao Tian, Rudolf Uher, Nese Direk, Yuri Milaneschi, Paola Giusti-Rodríguez, Rick Jansen, Marcus Ising, Yang Wu, Jesper Krogh, Merete Nordentoft, Jouke-Jan Hottenga, Robert Maier, Ming Hu, Kari Stefansson, Glyn Lewis, Peter McGuffin, Wolfgang Maier, Erin C. Dunn, Bradley T. Webb, Gerome Breen, Henning Teismann, Eric Jorgenson, Jorge A. Quiroz, Brenda W.J.H. Penninx, Jonas Bybjerg-Grauholm, Warren W. Kretzschmar, Dean F. MacKinnon, Craig A. Stockmeier, Wouter J. Peyrot, Enrico Domenici, E. C.J. De Geus, Alexander Teumer, Henry Völzke, Yihan Li, Michael John Owen, Manuel Mattheisen, Bernard Ng, Baptiste Couvy-Duchesne, Daniel J. Smith, Jana Strohmaier, Vassily Trubetskoy, Volker Arolt, Douglas F. Levinson, Futao Zhang, Daniel Umbricht, Aartjan F.T. Beekman, David A. Hinds, Bernhard T. Baune, Henning Tiemeier, Hualin S. Xi, Hamdi Mbarek, Steven P. Hamilton, Stefan Kloiber, Fernando S. Goes, Jianxin Shi, Marcella Rietschel, Dale R. Nyholt, Zoltán Kutalik, Niamh Mullins, Grant W. Montgomery, Henriette N. Buttenschøn, Georg Homuth, Katharina Domschke, Alexander Viktorin, Hilary K. Finucane, Ashley R. Winslow, Saira Saeed Mirza, Fabian Streit, Erik Pettersson, Martin Preisig, Danielle Posthuma, Stephan Ripke, Lucía Colodro-Conde, Thalia C. Eley, Pippa A. Thomson, Thomas Werge, Enrique Castelao, Klaus Berger, Yun Li, Stacy Steinberg, Dorret I. Boomsma, Matthias Nauck, Sara Mostafavi, Jacqueline M. Lane, Katherine E. Tansey, Divya Mehta, Gregory E. Crawford, Andreas J. Forstner, Jane H. Christensen, Silviu Alin Bacanu, Julia Kraft, David M. Hougaard, Peter M. Visscher, Valentina Escott-Price, Donald J. MacIntyre, Sarah E. Medland, Per Qvist, Kenneth S. Kendler, Jordan W. Smoller, J. Raymond DePaulo, Ian J. Deary, Thomas G. Schulze, Julien Bryois, Ian B. Hickie, Helena Gaspar, Jonathan Mill, James A. Knowles, Cathryn M. Lewis, Hassan S. Dashti, Stefan Herms, Margarita Rivera, John P. Rice, Lynsey S. Hall, Eilis Hannon, Nancy L. Pedersen, Eva C. Schulte, Hreinn Stefansson, Maciej Trzaskowski, André G. Uitterlinden, Bertram Müller-Myhsok, Gail Davies, Mark Adams, Jakob Grove, Eske M. Derks, Sven Cichon, Jonathan I.R. Coleman, Sandra Van der Auwera, Myrna M. Weissman, Preben Bo Mortensen, Josef Frank, Enda M. Byrne, Esben Agerbo, Engilbert Sigurdsson, Xiaoxiao Liu, Patrick F. Sullivan, Carsten Bøcker Pedersen, Ole Mors, Catherine Schaefer, Richa Saxena, Albert M. van Hemert, Jonathan Marchini, Hogni Oskarsson, Franziska Degenhardt, Tracy Air, Elisabeth B. Binder, Christel M. Middeldorp, Farnush Hassan Farhadi Kiadeh, Conor V. Dolan, Sara A. Paciga, Per Hoffmann, Leina Lu, Andrew M. McIntosh, Tim B. Bigdeli, Stephanie H. Witt, Matthew Traylor, Grant Sinnamon, Brien P. Riley, Roy H. Perlis, Patrick J. McGrath, Craig L. Hyde, Ling Shen, Na Cai, Yunpeng Wang, Evelin Mihailov, Isaac S. Kohane, APH - Mental Health, Adult Psychiatry, Amsterdam Neuroscience - Mood, Anxiety, Psychosis, Stress & Sleep, Biological Psychology, APH - Methodology, APH - Health Behaviors & Chronic Diseases, APH - Personalized Medicine, Integrative Neurophysiology, Complex Trait Genetics, Amsterdam Neuroscience - Complex Trait Genetics, Psychiatry, Amsterdam Reproduction & Development (AR&D), Human genetics, Epidemiology and Data Science, APH - Digital Health, Epidemiology, Child and Adolescent Psychiatry / Psychology, Internal Medicine, eQTLGen, 23andMe, Major Depressive Disorder Working Group of the Psychiatric Genomics Consortium, Interdisciplinary Centre Psychopathology and Emotion regulation (ICPE), Perceptual and Cognitive Neuroscience (PCN), and Clinical Cognitive Neuropsychiatry Research Program (CCNP)

Subjects
0301 basic medicine, Male, Netherlands Twin Register (NTR), Multifactorial Inheritance, Schizophrenia/genetics, LD SCORE REGRESSION, LOCI, Genome-wide association study, Bioinformatics, 0302 clinical medicine, Risk Factors, POLYGENIC RISK, Depression (differential diagnoses), 3. Good health, Phenotype, Schizophrenia, Meta-analysis, MENDELIAN RANDOMIZATION, Genome-Wide Association Study/methods, Major depressive disorder, Female, Depressive Disorder, Major/genetics, EUROPE 2010, Biology, Polymorphism, Single Nucleotide, Article, 03 medical and health sciences, SDG 3 - Good Health and Well-being, ddc:570, MENTAL-DISORDERS, Mendelian randomization, SYSTEMATIC ANALYSIS, Genetics, medicine, Journal Article, Humans, Genetic Predisposition to Disease, METAANALYSIS, EDUCATIONAL-ATTAINMENT, Depressive Disorder, Major, Case-control study, Case-Control Studies, medicine.disease, Genetic architecture, BODY-MASS INDEX, 030104 developmental biology, 030217 neurology & neurosurgery, Genome-Wide Association Study
Abstract

Major depressive disorder (MDD) is a common illness accompanied by considerable morbidity, mortality, costs, and heightened\ud risk of suicide. We conducted a genome-wide association meta-analysis based in 135,458 cases and 344,901 controls and identified\ud 44 independent and significant loci. The genetic findings were associated with clinical features of major depression and\ud implicated brain regions exhibiting anatomical differences in cases. Targets of antidepressant medications and genes involved\ud in gene splicing were enriched for smaller association signal. We found important relationships of genetic risk for major depression\ud with educational attainment, body mass, and schizophrenia: lower educational attainment and higher body mass were\ud putatively causal, whereas major depression and schizophrenia reflected a partly shared biological etiology. All humans carry\ud lesser or greater numbers of genetic risk factors for major depression. These findings help refine the basis of major depression\ud and imply that a continuous measure of risk underlies the clinical phenotype.

Published
2018

41. Osmosis and viscoelasticity both contribute to time-dependent behaviour of the intervertebral disc under compressive load: A caprine in vitro study

Author

Idsart Kingma, Kaj S. Emanuel, Theo H. Smit, Albert J. van der Veen, Christine M.E. Rustenburg, Orthopedic Surgery and Sports Medicine, AMS - Trauma and Reconstruction, Amsterdam Movement Sciences - Restoration and Development, Radiation Oncology, Neuromechanics, AMS - Restoration and Development, Medical Biology, AMS - Amsterdam Movement Sciences, and AMS - Tissue Function & Regeneration

Subjects
Osmosis, 0206 medical engineering, Hydrostatic pressure, Biomedical Engineering, Biophysics, 02 engineering and technology, Weight-Bearing, 03 medical and health sciences, 0302 clinical medicine, Interstitial fluid, medicine, Pressure, Animals, Orthopedics and Sports Medicine, Composite material, Intervertebral Disc, Water content, Chemistry, Viscosity, Annulus (oil well), Goats, Rehabilitation, Water, Intervertebral disc, Viscoelasticity, Anatomy, 020601 biomedical engineering, Elasticity, Compressive strength, medicine.anatomical_structure, Fluid flow, SDG 6 - Clean Water and Sanitation, Nucleus, 030217 neurology & neurosurgery
Abstract

The mechanical behaviour of the intervertebral disc highly depends on the content and transport of interstitial fluid. It is unknown, however, to what extent the time-dependent behaviour can be attributed to osmosis. Here we investigate the effect of both mechanical and osmotic loading on water content, nucleus pressure and disc height. Eight goat intervertebral discs, immersed in physiological saline, were subjected to a compressive force with a pressure needle inserted in the nucleus. The loading protocol was: 10 N (6 h); 150 N (42 h); 10 N (24 h). Half-way the 150 N-phase (24 h), we eliminated the osmotic gradient by adding 26% poly-ethylene glycol to the surrounding fluid. For 62 additional discs, we determined the water content of both nucleus and annulus after 6, 24, 48, or 72 h. The compressive load was initially counterbalanced by the hydrostatic pressure in the nucleus. The load forced 4.3% of the water out of the nucleus, which reduced nucleus pressure by 44(±6)%. Reduction of the osmotic gradient disturbed the equilibrium disc height, and a significant loss of annulus water content was found. Remarkably, pressure and water content of the nucleus pulposus remained unchanged. This shows that annulus water content is important in the response to axial loading. After unloading, in the absence of an osmotic gradient, there was substantial viscoelastic recovery of 53(±11)% of the disc height, without a change in water content. However, for restoration of the nucleus pressure and for full restoration of disc height, restoration of the osmotic gradient was needed.

Published
2018

42. The Effect of Rapport on Data Quality in Face-to-Face Interviews: Beneficial or Detrimental?

Author

Johannes H Smit, Stasja Draisma, Melany Horsfall, Merijn Eikelenboom, Psychiatry, APH - Mental Health, and APH - Methodology

Subjects
socially desirable, rapport, Health, Toxicology and Mutagenesis, media_common.quotation_subject, education, Sample (statistics), Article, Gee, law.invention, Consistency (negotiation), law, missing responses, Humans, data quality, Interpersonal Relations, Quality (business), Association (psychology), Generalized estimating equation, media_common, consistency, Public Health, Environmental and Occupational Health, Data Accuracy, Data quality, CLARITY, Medicine, Psychology, Social psychology
Abstract

The benefits of rapport between interviewers and respondents, in terms of recruiting the latter and motiving them to participate in research, have been generally endorsed. However, there has been less clarity with regard to the association between rapport and data quality. In theory, rapport could be beneficial if it motivates people to give complete and honest responses. On the other hand, efforts to maintain rapport by exhibiting pleasing and socially desirable behaviour could well be detrimental to data quality. In a large longitudinal epidemiological sample, generalized estimating equations (GEE) analyses were used to examine the association between rapport and the following three quality indicators: missing responses, responses to sensitive questions, and consistency of responses. The results of these analyses indicate an association between a high level of rapport and fewer missing responses. In contrast, we found more socially desirable responses for the high-rapport group. Finally, the high-rapport group did not differ from the low-rapport group in terms of the consistency of their responses.

Published
2021

43. Closing the osteon: Do osteocytes sense strain rate rather than fluid flow?

Author

Theo H. Smit

Subjects
0303 health sciences, Osteoblasts, Materials science, Osteoclasts, Osteoblast, Matrix (biology), Strain rate, Osteocytes, Bone and Bones, General Biochemistry, Genetics and Molecular Biology, Bone remodeling, Haversian System, 03 medical and health sciences, 0302 clinical medicine, Osteon, medicine.anatomical_structure, Osteocyte, Fluid dynamics, medicine, Biophysics, Mechanosensitive channels, 030217 neurology & neurosurgery, 030304 developmental biology
Abstract

Osteons are cylindrical structures of bone created by matrix resorbing osteoclasts, followed by osteoblasts that deposit new bone. Osteons align with the principal loading direction and it is thought that the osteoclasts are directed by osteocytes, the mechanosensitive cells that reside inside the bone matrix. These osteocytes are presumably controlled by interstitial fluid flow, induced by the physiological loading of bones. Here I consider the stimulation of osteocytes while the osteon is closed by osteoblasts. In a conceptual finite element model, bone is considered a poro-elastic material and subjected to locomotion-induced loading conditions. It appears that the magnitude of flow is constant along the closing cone, while shear strain rate in the bone matrix diminishes linearly with the deposition of bone. This suggests that shear strain rate, rather than fluid flow, is the physical cue that controls osteocytes and bone deposition in newly formed osteons.

Published
2021

44. A novel physiological testing device to study knee biomechanics in vitro

Author

Thomas Wijffels, Kaj S. Emanuel, Peter N. Kooren, Fabian van de Bunt, Theo H. Smit, Idsart Kingma, Neuromechanics, AMS - Restoration and Development, Orthopedic Surgery and Sports Medicine, Amsterdam Movement Sciences - Restoration and Development, Physics and medical technology, Medical Biology, Amsterdam Movement Sciences, and AMS - Tissue Function & Regeneration

Subjects
musculoskeletal diseases, Knee Joint, Knee biomechanics, Anterior cruciate ligament, Joint load, Osteoarthritis, Kinematics, In Vitro Techniques, 03 medical and health sciences, 0302 clinical medicine, Biomechanical testing device, Medicine, Animals, Humans, Orthopedics and Sports Medicine, Knee, Anterior Cruciate Ligament, Range of Motion, Articular, Surgical treatment, 030203 arthritis & rheumatology, Orthodontics, 030222 orthopedics, biology, business.industry, Anterior Cruciate Ligament Injuries, Goats, Reproducibility of Results, Anatomy, biology.organism_classification, medicine.disease, musculoskeletal system, Gait, Biomechanical Phenomena, Knee simulator, Valgus, medicine.anatomical_structure, Feasibility Studies, business, human activities
Abstract

Background: To properly study knee kinetics, kinematics and the effects of injury and surgical treatment in vitro, the knee should be constrained as little as possible, while imposing physiological loads. A novel dynamic biomechanical knee system (BKS) is presented here. The aim of this study was to test the feasibility and reproducibility of the system and demonstrate its features with an Anterior Cruciate Ligament (ACL) lesion model. Methods: Six goat knees were used in the current study. Flexion and extension simulating gait was imposed by a servo-motor, while normal joint load was applied by two artificial muscles. Intra-class correlation coefficients (ICCs) were assessed for inter-test measures, while paired t-tests were performed for comparison between intact knees and knees with ACL-lesion. Results: The ICC's for inter-test measures based on all six goat knees were excellent: varus/valgus: ICC = 0.93; rotation: ICC = 0.94 (all p

Published
2017

45. The impact of conscientiousness, mastery, and work circumstances on subsequent absenteeism in employees with and without affective disorders

Author

Inger Plaisier, Brenda W.J.H. Penninx, Almar A L Kok, Johannes H. Smit, Epidemiology and Data Science, APH - Quality of Care, Psychiatry, APH - Mental Health, APH - Aging & Later Life, APH - Methodology, APH - Digital Health, Sociology, and The Social Context of Aging (SoCA)

Subjects
Adult, Employment, Male, Coping (psychology), Work, Adolescent, media_common.quotation_subject, lcsh:BF1-990, Anxiety, Affect (psychology), Occupational safety and health, Developmental psychology, Self-Control, 03 medical and health sciences, Young Adult, 0302 clinical medicine, Professional Competence, 0502 economics and business, Absenteeism, medicine, Personality, Humans, 030212 general & internal medicine, Workplace, General Psychology, media_common, Aged, Netherlands, Social work, Mood Disorders, Depression, 05 social sciences, Conscientiousness, SDG 8 - Decent Work and Economic Growth, General Medicine, Middle Aged, lcsh:Psychology, Female, medicine.symptom, Psychology, 050203 business & management, Clinical psychology, Follow-Up Studies, Research Article
Abstract

Background: High numbers of employees are coping with affective disorders. At the same time, ambitiousness, achievement striving and a strong sense of personal control and responsibility are personality characteristics that are nowadays regarded as key to good work functioning, whereas social work circumstances tend to be neglected. However, it is largely unkown how personality characteristics and work circumstances affect work functioning when facing an affective disorder. Given the high burden of affective disorders on occupational health, we investigate these issues in the context of affective disorders and absenteeism from work. The principal aim of this paper is to examine whether particular personality characteristics that reflect self-governance (conscientiousness and mastery) and work circumstances (demands, control, support) influence the impact of affective disorders on long-term absenteeism (>10 working days). Methods: Baseline and 1-year follow-up data from 1249 participants in the Netherlands Study of Depression and Anxiety (NESDA) in 2004-2006 was employed. Multivariate logistic regression analyses were performed, including interaction effects between depressive, anxiety, and comorbid disorders and personality and work circumstances. Results: In general, mastery and conscientiousness increased nor diminished odds of subsequent long-term absenteeism, whereas higher job support significantly decreased these odds. Interaction effects showed that the impact of affective disorders on absenteeism was stronger for highly conscientious employees and for employees who experienced high job demands. Conclusions: Affective disorders may particularly severely affect work functioning of employees who are highly conscientious or face high psychological job demands. Adjusting working conditions to their individual needs may prevent excessive work absence.

Published
2017

46. Correction to: Advancing interdisciplinary research in head and neck cancer through a multicenter longitudinal prospective cohort study: the NETherlands QUality of life and BIomedical Cohort (NET-QUBIC) data warehouse and biobank

Author

Robert P. Takes, Johannes A. Langendijk, C.R. Leemans, Femke Jansen, C.H.J. Terhaard, I.M. Verdonck-de Leeuw, Ruud H. Brakenhoff, R. J. Baatenburg de Jong, and Jan H. Smit

Subjects
0301 basic medicine, Gerontology, Cancer Research, Survival, lcsh:RC254-282, Study Protocol, 03 medical and health sciences, 0302 clinical medicine, Data warehouse, Quality of life, Genetics, medicine, Health related quality of life, Head and neck cancer, Prospective cohort study, Biobank, Toxicity, business.industry, Cancer, lcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogens, medicine.disease, 3. Good health, 030104 developmental biology, Caregivers, Oncology, 030220 oncology & carcinogenesis, Symptoms, Cohort, Cohort study, business
Abstract

Background Worldwide, over 500,000 people are diagnosed with head and neck cancer each year, a disease with major impact on life expectancy and quality of life. The purpose of the Netherlands Quality of life and Biomedical Cohort study (NET-QUBIC) is to advance interdisciplinary research that aims to optimize diagnosis, treatment, and supportive care for head and neck cancer patients and their informal caregivers. Methods Using an extensive assessment protocol (electronic clinical record form, patient reported outcome measures and fieldwork (interviews and physical tests)), clinical data and data on quality of life, demographic and personal factors, psychosocial (depression, anxiety, fatigue, pain, sleep, mental adjustment to cancer, posttraumatic stress), physical (speech, swallowing, oral function, malnutrition, physical fitness, neurocognitive function, sexual function), lifestyle (physical activity, nutrition, smoking, alcohol, drugs), and social factors (social function, social support, work, health care use, and costs) are collected and stored in the data warehouse. A longitudinal biobank is built with tumor tissue, blood and blood components, saliva samples, and oral rinses. An infrastructure for fieldwork and laboratory protocols is established at all participating centers. All patients fill out patient reported outcome measures before treatment and at 3, 6, 12, 24, 36, 48, and 60 months follow-up. The interviews, physical tests and biological sample collection are at baseline and 6, 12, and 24 months follow-up. The protocol for caregivers includes blood sampling and oral rinses at baseline and a tailored list of questionnaires, administered at the same time points as the patients. In total, 739 HNC patients and 262 informal caregivers have been included in 5 out of the 8 HNC centers in the Netherlands. Discussion By granting access to researchers to the NET-QUBIC data warehouse and biobank, we enable new research lines in clinical (e.g. treatment optimization in elderly patients), biological (e.g. liquid biopsy analysis for relapse detection), health related quality of life (e.g. the impact of toxicity on quality of life), and interrelated research (e.g. health related quality of life in relation to biomarkers and survival).

Published
2019

47. Prognostic factors in the progression of intervertebral disc degeneration

Author

Christine M.E. Rustenburg, Theo H. Smit, Kaj S. Emanuel, Johannes C.F. Ket, and Sayf S. A. Faraj

Subjects
Oncology, medicine.medical_specialty, Prognostic factor, Disc herniation, LUMBAR SPINE, BONE-MARROW, review, Degeneration (medical), DETERMINANTS, 03 medical and health sciences, 0302 clinical medicine, Degenerative disease, lcsh:Orthopedic surgery, environmental factor, Internal medicine, medicine, degenerative disease, Orthopedics and Sports Medicine, Limited evidence, Methodological quality, low back pain, PROTEOGLYCANS, REPAIR, 030222 orthopedics, disc herniation, business.industry, imaging, Intervertebral disc, ASSOCIATION, medicine.disease, Low back pain, lcsh:RD701-811, medicine.anatomical_structure, OSTEOARTHRITIS, RISK-FACTORS, 5-YEAR FOLLOW-UP, medicine.symptom, business, 030217 neurology & neurosurgery, LOW-BACK-PAIN, MRI
Abstract

Objective: Possible regenerative treatments for lumbar intervertebral disc degeneration (DD) are rapidly emerging. There is consensus that the patient that would benefit most has early-stage DD, with a predicted deterioration in the near future. To identify this patient, the aim of this study was to identify prognostic factors for progression of DD.Study design: Systematic review.Methods: A systematic search was performed on studies evaluating one or more prognostic factor(s) in the progression of DD. The criteria for inclusion were (a) patients diagnosed with DD on MRI, (b) progression of DD at follow-up, and (c) reporting of one or more prognostic factor(s) in progression of DD. Two authors independently assessed the methodological quality of the included studies. Due to heterogeneity in DD determinants and outcomes, only a best-evidence synthesis could be conducted.Results: The search generated 3165 references, of which 16 studies met our inclusion criteria, involving 2.423 patients. Within these, a total of 23 clinical and environmental and 12 imaging factors were identified. There was strong evidence that disc herniation at baseline is associated with progression of DD at follow-up. There is limited evidence that IL6 rs1800795 genotype G/C male was associated with no progression of DD. Some clinical or environmental factors such as BMI, occupation and smoking were not associated with progression.Conclusions: Disc herniation is strongly associated with the progression of DD. Surprisingly, there was strong evidence that smoking, occupation, and several other factors were not associated with the progression of DD. Only one genetic variant may have a protective effect on progression, otherwise there was conflicting or only limited evidence for most prognostic factors. Future research into these prognostic factors with conflicting and limited evidence is not only needed to determine which patients should be targeted by regenerative therapies, but will also contribute to spinal phenotyping.

Published
2019

48. Physical activity in patients with cancer: self-report versus accelerometer assessments

Author

Saskia Persoon, Willem van Mechelen, Irma M. Verdonck-de Leeuw, Caroline S. Kampshoff, Jan H. Smit, Mai J. M. Chinapaw, Marie José Kersten, Frans Nollet, Laurien M. Buffart, Jorine A. Vermaire, Teatske M. Altenburg, Maaike B. de Beaufort, Joeri A J Douma, Faculty of Behavioural and Movement Sciences, Clinical Psychology, APH - Mental Health, Physiology, Medical oncology, APH - Health Behaviors & Chronic Diseases, Public and occupational health, Psychiatry, Otolaryngology / Head & Neck Surgery, APH - Personalized Medicine, CCA - Cancer Treatment and quality of life, Epidemiology and Data Science, Amsterdam Reproduction & Development (AR&D), AMS - Rehabilitation & Development, APH - Societal Participation & Health, APH - Methodology, Graduate School, Rehabilitation medicine, AMS - Restoration & Development, CCA - Cancer Treatment and Quality of Life, and Clinical Haematology

Subjects
Male, medicine.medical_specialty, Accelerometer, Accelerometer-assessed physical activity, Agreement, Cohort Studies, 03 medical and health sciences, 0302 clinical medicine, Quality of life, SDG 3 - Good Health and Well-being, Endurance training, Neoplasms, Surveys and Questionnaires, Accelerometry, Medicine, Humans, 030212 general & internal medicine, Exercise, Cancer, business.industry, Self-reported physical activity, Regression analysis, Middle Aged, medicine.disease, Transplantation, Oncology, 030220 oncology & carcinogenesis, Standardized coefficient, Physical therapy, Quality of Life, Female, Original Article, Self Report, business, Cohort study
Abstract

Purpose The level of daily physical activity in patients with cancer is frequently assessed by questionnaires, such as the Physical Activity Scale for the Elderly (PASE). Objective assessments, with for example accelerometers, may be a good alternative. The aim of this study was to investigate the agreement between the PASE questionnaire and accelerometer-assessed physical activity in a large group of patients with different types of cancer. Methods Baseline accelerometer and PASE questionnaire data of 403 participants from the REACT (Resistance and Endurance Exercise After Chemotherapy, n = 227), the EXIST (Exercise Intervention After Stem-Cell Transplantation, n = 74), and NET-QUBIC (NEtherlands QUality of Life And Biomedical Cohort Studies In Cancer, n = 102) studies were available for the current analyses. Physical activity was assessed by the PASE questionnaire (total score) and accelerometers (total minutes per day > 100 counts). Linear mixed models regression analysis was used to assess the agreement between the PASE questionnaire and accelerometer-assessed physical activity. Results The mean (SD) PASE score was 95.9 (75.1) points and mean (SD) time in physical activity measured with the accelerometer was 256.6 (78.8) min per day. The agreement between the PASE score and the accelerometer data was significant, but poor (standardized regression coefficient (B) = 0.36, 95%CI = 0.27; 0.44, p < 0.01). Conclusion Agreement between the PASE questionnaire and accelerometer-assessed physical activity was poor. The poor agreement indicates that they measure different physical activity constructs and cannot be used interchangeably to assess the level of daily physical activity in patients with cancer.

Published
2019

49. Dissociative subtype of posttraumatic stress disorder or PTSD with comorbid dissociative disorders: Comparative evaluation of clinical profiles

Author

Marleen Wildschut, Willemien Langeland, Sanne Swart, Nel Draijer, Jan H. Smit, Psychiatry, APH - Mental Health, and APH - Methodology

Subjects
Adult, Male, Social Psychology, Adolescent, medicine.drug_class, Dissociative Experiences Scale, Comorbidity, Dissociative Disorders, Dissociative, behavioral disciplines and activities, Personality Disorders, Diagnosis, Differential, Stress Disorders, Post-Traumatic, 03 medical and health sciences, Young Adult, 0302 clinical medicine, Depersonalization, mental disorders, medicine, Derealization, Humans, Dissociative disorders, Aged, business.industry, Middle Aged, medicine.disease, Personality disorders, 030227 psychiatry, Clinical Psychology, Anxiety, Female, medicine.symptom, business, 030217 neurology & neurosurgery, Clinical psychology
Abstract

Introduction The fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (American Psychiatric Association, 2013) introduced a dissociative subtype for patients with posttraumatic stress disorder (PTSD) and depersonalization and/or derealization symptoms. Despite high comorbidity rates between PTSD and dissociative disorders (DDs), research has not paid attention to the differentiation or overlap between the dissociative subtype of PTSD and DDs. This raises a question: To what extent do patients with dissociative PTSD differ from patients with PTSD and comorbid DDs? Method We compared three groups of complex patients with trauma-related disorders and/or personality disorders (n = 150): a dissociative PTSD, a nondissociative PTSD, and a non-PTSD group of patients with mainly personality disorders. We used structured clinical interviews and self-administered questionnaires on dissociative symptoms and disorders, personality disorders, trauma histories, depression, anxiety, and general psychopathology. The Dissociative Experiences Scale (DES; ≥20) and the depersonalization/derealization subscale of the DES were used for differentiating dissociative PTSD from nondissociative PTSD. Results Of all patients, 33% met criteria for dissociative PTSD. More than half of the dissociative PTSD patients (54%) met criteria for one or more DDs; using the depersonalization/derealization subscale of the DES, even 66% had a comorbid DD. But also of the non-PTSD patients, 24% had a mean DES score of ≥20. There were no symptomatic differences (e.g., depression and anxiety) between dissociative PTSD with and without comorbid DDs. Conclusion Overlap between dissociative PTSD and DD is large and we recommend replication of previous studies, using structured clinical assessment of DDs. (PsycINFO Database Record (c) 2020 APA, all rights reserved).

Published
2019

50. Development of a novel benchmark method to identify and characterize best practices in home care across six European countries: design, baseline, and rationale of the IBenC project

Author

Anja Declercq, Palmi V. Jonsson, IBenC, Lisanne I. van Lier, Vjenka Garms-Homolová, Johannes H Smit, Harriet Finne-Soveri, Stasja Draisma, Liza Van Eenoo, Judith E. Bosmans, Hein P.J. van Hout, Graziano Onder, Henriëtte G. van der Roest, General practice, Psychiatry, Amsterdam Neuroscience - Mood, Anxiety, Psychosis, Stress & Sleep, APH - Mental Health, APH - Methodology, APH - Aging & Later Life, APH - Quality of Care, APH - Digital Health, Læknadeild (HÍ), Faculty of Medicine (UI), Heilbrigðisvísindasvið (HÍ), School of Health Sciences (UI), Háskóli Íslands, and University of Iceland

Subjects
Male, Activities of daily living, Databases, Factual, Health Personnel, Costs of care utilization, Cross-country comparison, Health informatics, Home care, Health administration, 03 medical and health sciences, Elderly, 0302 clinical medicine, Health care policy, Nursing, Surveys and Questionnaires, Activities of Daily Living, Health care, Heilbrigðisstefna, Humans, Medicine, 030212 general & internal medicine, Cognitive decline, Health policy, Aged, Quality of Health Care, Aged, 80 and over, Aldraðir, business.industry, lcsh:Public aspects of medicine, 030503 health policy & services, Health Policy, Nursing research, Quality of care, lcsh:RA1-1270, Benchmarking, Home Care Services, Long-Term Care, Europe, Health Care Surveys, Heimahjúkrun, Female, 0305 other medical science, business, Research Article
Abstract

Publisher's version (útgefin grein), Background: Europe's ageing society leads to an increased demand for long-term care, thereby putting a strain on the sustainability of health care systems. The 'Identifying best practices for care-dependent elderly by Benchmarking Costs and outcomes of Community Care' (IBenC) project aims to develop a new benchmark methodology based on quality of care and cost of care utilization to identify best practices in home care. The study's baseline data, methodology, and rationale are reported. Methods: Home care organizations in Belgium, Finland, Germany, Iceland, Italy, and the Netherlands, home care clients of 65 years and over receiving home care, and professionals working in these organizations were included. Client data were collected according to a prospective longitudinal design with the interRAI Home Care instrument. Assessments were performed at baseline, after six and 12 months by trained (research) nurses. Characteristics of home care organizations and professionals were collected cross-sectionally with online surveys. Results: Thirty-eight home care organizations, 2884 home care clients, and 1067 professionals were enrolled. Home care clients were mainly female (66.9%), on average 82.9 years (± 7.3). Extensive support in activities of daily living was needed for 41.6% of the sample, and 17.6% suffered cognitive decline. Care professionals were mainly female (93.4%), and over 45 years (52.8%). Considerable country differences were found. Conclusion: A unique, international, comprehensive database is established, containing in-depth information on home care organizations, their clients and staff members. The variety of data enables the development of a novel cost-quality benchmark method, based on interRAI-HC data. This benchmark can be used to explore relevant links between organizational efficiency and organizational and staff characteristics., The IBenC project was funded by the 7th Framework Programme of the European Commission (Grant No. 305912) [20]. The contents of this article reflect only the authors’ views and the European Commission is not liable for any use that may be made of the information contained therein.

Published
2019

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