881 results on '"Xavier, M."'
Search Results
2. Hemophilia B and gene therapy: a new chapter with etranacogene dezaparvovec
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Anguela, Xavier M. and High, Katherine A.
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- 2024
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3. Extraction and Visualization of Poincar\'e Map Topology for Spacecraft Trajectory Design
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Tricoche, Xavier M., Schlei, Wayne R., and Howell, Kathleen C.
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Nonlinear Sciences - Chaotic Dynamics ,Computer Science - Human-Computer Interaction - Abstract
Mission designers must study many dynamical models to plan a low-cost spacecraft trajectory that satisfies mission constraints. They routinely use Poincar\'e maps to search for a suitable path through the interconnected web of periodic orbits and invariant manifolds found in multi-body gravitational systems. This paper is concerned with the extraction and interactive visual exploration of this structural landscape to assist spacecraft trajectory planning. We propose algorithmic solutions that address the specific challenges posed by the characterization of the topology in astrodynamics problems and allow for an effective visual analysis of the resulting information. This visualization framework is applied to the circular restricted three-body problem (CR3BP), where it reveals novel periodic orbits with their relevant invariant manifolds in a suitable format for interactive transfer selection. Representative design problems illustrate how spacecraft path planners can leverage our topology visualization to fully exploit the natural dynamics pathways for energy-efficient trajectory designs., Comment: 11 pages, 13 figures, to appear at IEEE VIS 2020
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- 2020
4. The Main Protease of Middle East Respiratory Syndrome Coronavirus Induces Cleavage of Mitochondrial Antiviral Signaling Protein to Antagonize the Innate Immune Response
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Mariska van Huizen, Xavier M. Vendrell, Heidi L. M. de Gruyter, A. Linda Boomaars-van der Zanden, Yvonne van der Meer, Eric J. Snijder, Marjolein Kikkert, and Sebenzile K. Myeni
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MERS-CoV ,Mpro ,immune evasion ,MAVS ,Microbiology ,QR1-502 - Abstract
Mitochondrial antiviral signaling protein (MAVS) is a crucial signaling adaptor in the sensing of positive-sense RNA viruses and the subsequent induction of the innate immune response. Coronaviruses have evolved multiple mechanisms to evade this response, amongst others, through their main protease (Mpro), which is responsible for the proteolytic cleavage of the largest part of the viral replicase polyproteins pp1a and pp1ab. Additionally, it can cleave cellular substrates, such as innate immune signaling factors, to dampen the immune response. Here, we show that MAVS is cleaved in cells infected with Middle East respiratory syndrome coronavirus (MERS-CoV), but not in cells infected with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). This cleavage was independent of cellular negative feedback mechanisms that regulate MAVS activation. Furthermore, MERS-CoV Mpro expression induced MAVS cleavage upon overexpression and suppressed the activation of the interferon-β (IFN-β) and nuclear factor-κB (NF-κB) response. We conclude that we have uncovered a novel mechanism by which MERS-CoV downregulates the innate immune response, which is not observed among other highly pathogenic coronaviruses.
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- 2024
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5. Role of machine learning in differentiating benign from malignant indeterminate thyroid nodules: A literature review
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Conn Busch, Julian M., Cozzi, Joseph L., Li, Hui, Lan, Li, Giger, Maryellen L., and Keutgen, Xavier M.
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- 2023
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6. The North American Neuroendocrine Tumor Society Consensus Paper on the Surgical Management of Pancreatic Neuroendocrine Tumors.
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Howe, James R, Merchant, Nipun B, Conrad, Claudius, Keutgen, Xavier M, Hallet, Julie, Drebin, Jeffrey A, Minter, Rebecca M, Lairmore, Terry C, Tseng, Jennifer F, Zeh, Herbert J, Libutti, Steven K, Singh, Gagandeep, Lee, Jeffrey E, Hope, Thomas A, Kim, Michelle K, Menda, Yusuf, Halfdanarson, Thorvardur R, Chan, Jennifer A, and Pommier, Rodney F
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Humans ,Neuroendocrine Tumors ,Pancreatic Neoplasms ,Societies ,Medical ,North America ,Consensus Development Conferences as Topic ,Review Literature as Topic ,Practice Guidelines as Topic ,Surgeons ,Rare Diseases ,Cancer ,Neurosciences ,Pancreatic Cancer ,Digestive Diseases ,pancreas ,neuroendocrine ,pancreatic neuroendocrine tumor ,metastases ,neuroendocrine tumor liver metastases ,pancreatectomy ,Clinical Sciences ,Gastroenterology & Hepatology - Abstract
This manuscript is the result of the North American Neuroendocrine Tumor Society consensus conference on the surgical management of pancreatic neuroendocrine tumors from July 19 to 20, 2018. The group reviewed a series of questions of specific interest to surgeons taking care of patients with pancreatic neuroendocrine tumors, and for each, the available literature was reviewed. What follows are these reviews for each question followed by recommendations of the panel.
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- 2020
7. Examination of isotropy assumption in isogrid structures through analysis and experimentation on four isogrid variations
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Delgado, Xavier M. and Merrett, Craig G.
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- 2023
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8. Role of machine learning in differentiating benign from malignant indeterminate thyroid nodules: A literature review
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Julian M. Conn Busch, Joseph L. Cozzi, Hui Li, Li Lan, Maryellen L. Giger, and Xavier M. Keutgen
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Thyroid nodule ,Thyroid cancer ,Deep learning ,Machine learning ,Computer-aided diagnosis ,Medicine - Abstract
Rationale and Objectives: Thyroid nodules are a common occurrence and up to 30% are indeterminate on Fine Needle Aspiration (FNA) biopsy. Use of machine learning (ML) algorithms as computer aids, i.e., computer-aided diagnosis (CADx), may provide accessible, accurate methods of diagnosing thyroid cancer on ultrasound (US) images of thyroid nodules. We conducted a systematic review to synthesize the current knowledge and potential of ML in assisting physicians in diagnosing indeterminate thyroid nodules. Materials and Methods: We searched PubMed for studies without a year constraint. Inclusion criteria were as follows: (1) publication of the study as a full-text manuscript in a peer-reviewed journal, (2) original work (e.g., not a review). Studies were excluded if they (1) did not perform FNA biopsy, (2) excluded all indeterminate lesions, (3) focused on a non-cancer thyroid pathology, (4) described only non-diagnostic uses of their model(s) (e.g. calcification quantification), or (5) did not use grayscale ultrasound. We used the Joanna Briggs Institute Appraisal Checklist for Diagnostic Test Accuracy Studies to synthesize and present quality data and PRISMA guidelines for reporting. Results: Our search yielded only 6 articles published between 2013 and 2022. All studies used either only fine-needle aspiration (FNA) biopsy or a combination of FNA and surgery as the reference standard. Of these, one study included only indeterminate nodules, while 5 studies included other nodules in categories as well. Results varied greatly and studies were inconsistent in which performance metrics they reported. Physician performances yielded areas under the ROC curve (AUC) ranging from 0.68 to 0.83, while ML models gave AUCs from 0.666 to 0.954. One study showed that their model had a greater AUC than physicians, while another study showed no difference in AUCs of their ML model and physicians. Another study demonstrated that their ML-assisted approach had a greater AUC (0.917) than either an American College of Radiology (ACR) Thyroid Imaging Reporting & Data System (TI-RADS)-only approach (AUC 0.68) or a ML only approach (AUC 0.77). One study measured the performance of ML models without physician comparison, with AUCs ranging from 0.85 to 0.90. One study found no difference between their ML model and molecular testing (AUC 0.88 and 0.81, respectively). Conclusion: The growing field of CADx and increasing availability of commercial models suggests an increasing interest toward utilization of ML-assisted diagnosis in the clinical setting. However, there is a significant lack of research on the role of ML the diagnosis of indeterminate thyroid nodules. Funding: The source of funding for this review was institutional funds from the University of Chicago.
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- 2023
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9. Interplay between Shelf Life and Printability of Silica-Filled Suspensions
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Xavier M. Torres, John R. Stockdale, Santosh Adhikari, Shelbie A. Legett, Adam Pacheco, Jesus A. Guajardo, and Andrea Labouriau
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silica ,siloxane suspensions ,rheology ,additive manufacturing ,direct ink writing ,3D printability ,Organic chemistry ,QD241-441 - Abstract
Although fumed silica/siloxane suspensions are commonly employed in additive manufacturing technology, the interplay between shelf life, storage conditions, and printability has yet to be explored. In this work, direct ink writing (DIW) was used to print unique three-dimensional structures that required suspensions to retain shape and form while being printed onto a substrate. Suspensions containing varying concentrations of hydrophobic and hydrophilic silica were formulated and evaluated over a time span of thirty days. Storage conditions included low (8%) and high (50%) relative humidity and temperatures ranging from 4 °C to 25 °C. The shelf life of the suspensions was examined by comparing the print quality of pristine and aged samples via rheology, optical microscopy, and mechanical testing. Results showed a significant decrease in printability over time for suspensions containing hydrophilic fumed silica, whereas the printability of suspensions containing hydrophobic fumed silica remained largely unchanged after storage. The findings in this work established the following recommendations for extending the shelf life and printability of suspensions commonly used in DIW technology: (1) higher fumed silica concentrations, (2) low humidity and low temperature storage environments, and (3) the use of hydrophobic fumed silica instead of hydrophilic fumed silica.
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- 2023
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10. Eucharist, Synodality, and Ethics: Making Connections
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Xavier M. Montecel
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synodality ,synodal ,eucharist ,ethics ,virtue ,ecclesiology ,Religions. Mythology. Rationalism ,BL1-2790 - Abstract
The central premise of this article is that synodality ought to be grounded in the Eucharist. The author explores the implications of this claim in the areas of ecclesiology and ethics. On the side of ecclesiology, the author argues that the Eucharist is the ritual and theological center of a synodal church. In the context of its own life, considered not only at an abstract theological level but at a practical and political level as well, the church cannot be synodal if it is not attentive to its Eucharistic origins. Synodality is the key in which communion is realized. The author discusses this idea in the context of the Eucharist Revival in the United States and in connection to baptism and the ecclesiology of the People of God. On the side of ethics, the author develops an account of synodality as a virtue. Synodality is the virtue that shapes the church and its members in order to realize communion. Its object is the right use of power. An ethics of synodality, the author argues, entails both reform in the church itself and a commitment on the part of the church and its members to a politics of the universal common good and the building of a just social order.
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- 2023
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11. Epigenome erosion and SOX10 drive neural crest phenotypic mimicry in triple-negative breast cancer
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Jodi M. Saunus, Xavier M. De Luca, Korinne Northwood, Ashwini Raghavendra, Alexander Hasson, Amy E. McCart Reed, Malcolm Lim, Samir Lal, A. Cristina Vargas, Jamie R. Kutasovic, Andrew J. Dalley, Mariska Miranda, Emarene Kalaw, Priyakshi Kalita-de Croft, Irma Gresshoff, Fares Al-Ejeh, Julia M. W. Gee, Chris Ormandy, Kum Kum Khanna, Jonathan Beesley, Georgia Chenevix-Trench, Andrew R. Green, Emad A. Rakha, Ian O. Ellis, Dan V. Nicolau, Peter T. Simpson, and Sunil R. Lakhani
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Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Abstract Intratumoral heterogeneity is caused by genomic instability and phenotypic plasticity, but how these features co-evolve remains unclear. SOX10 is a neural crest stem cell (NCSC) specifier and candidate mediator of phenotypic plasticity in cancer. We investigated its relevance in breast cancer by immunophenotyping 21 normal breast and 1860 tumour samples. Nuclear SOX10 was detected in normal mammary luminal progenitor cells, the histogenic origin of most TNBCs. In tumours, nuclear SOX10 was almost exclusive to TNBC, and predicted poorer outcome amongst cross-sectional (p = 0.0015, hazard ratio 2.02, n = 224) and metaplastic (p = 0.04, n = 66) cases. To understand SOX10’s influence over the transcriptome during the transition from normal to malignant states, we performed a systems-level analysis of co-expression data, de-noising the networks with an eigen-decomposition method. This identified a core module in SOX10’s normal mammary epithelial network that becomes rewired to NCSC genes in TNBC. Crucially, this reprogramming was proportional to genome-wide promoter methylation loss, particularly at lineage-specifying CpG-island shores. We propose that the progressive, genome-wide methylation loss in TNBC simulates more primitive epigenome architecture, making cells vulnerable to SOX10-driven reprogramming. This study demonstrates potential utility for SOX10 as a prognostic biomarker in TNBC and provides new insights about developmental phenotypic mimicry—a major contributor to intratumoral heterogeneity.
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- 2022
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12. Lisa Allen, A Womanist Theology of Worship: Liturgy, Justice, and Communal Righteousness
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Xavier M. Montecel
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Moral theology ,BV4625-4780 - Abstract
A review of Lisa Allen, _A Womanist Theology of Worship: Liturgy, Justice, and Communal Righteousness_.
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- 2023
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13. A de novo paradigm for male infertility
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Oud, M. S., Smits, R. M., Smith, H. E., Mastrorosa, F. K., Holt, G. S., Houston, B. J., de Vries, P. F., Alobaidi, B. K. S., Batty, L. E., Ismail, H., Greenwood, J., Sheth, H., Mikulasova, A., Astuti, G. D. N., Gilissen, C., McEleny, K., Turner, H., Coxhead, J., Cockell, S., Braat, D. D. M., Fleischer, K., D’Hauwers, K. W. M., Schaafsma, E., Nagirnaja, L., Conrad, D. F., Friedrich, C., Kliesch, S., Aston, K. I., Riera-Escamilla, A., Krausz, C., Gonzaga-Jauregui, C., Santibanez-Koref, M., Elliott, D. J., Vissers, L. E. L. M., Tüttelmann, F., O’Bryan, M. K., Ramos, L., Xavier, M. J., van der Heijden, G. W., and Veltman, J. A.
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- 2022
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14. Epigenome erosion and SOX10 drive neural crest phenotypic mimicry in triple-negative breast cancer
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Saunus, Jodi M., De Luca, Xavier M., Northwood, Korinne, Raghavendra, Ashwini, Hasson, Alexander, McCart Reed, Amy E., Lim, Malcolm, Lal, Samir, Vargas, A. Cristina, Kutasovic, Jamie R., Dalley, Andrew J., Miranda, Mariska, Kalaw, Emarene, Kalita-de Croft, Priyakshi, Gresshoff, Irma, Al-Ejeh, Fares, Gee, Julia M. W., Ormandy, Chris, Khanna, Kum Kum, Beesley, Jonathan, Chenevix-Trench, Georgia, Green, Andrew R., Rakha, Emad A., Ellis, Ian O., Nicolau, Jr, Dan V., Simpson, Peter T., and Lakhani, Sunil R.
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- 2022
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15. Preclinical assessment of an optimized AAV-FVIII vector in mice and non-human primates for the treatment of hemophilia A
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Liron Elkouby, Sean M. Armour, Raffaella Toso, Marti DiPietro, Robert J. Davidson, Giang N. Nguyen, Mallory Willet, Stephanie Kutza, Joseph Silverberg, Jennifer Frick, Marco Crosariol, Yuhuan Wang, Chuansong Wang, Katherine A. High, Denise E. Sabatino, and Xavier M. Anguela
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hemophilia A ,AAV ,optimized vectors ,codon optimization ,low AAV dose ,preclinical development ,Genetics ,QH426-470 ,Cytology ,QH573-671 - Abstract
Extensive clinical data from liver-mediated gene therapy trials have shown that dose-dependent immune responses against the vector capsid may impair or even preclude transgene expression if not managed successfully with prompt immune suppression. The goal of this preclinical study was to generate an adeno-associated viral (AAV) vector capable of expressing therapeutic levels of B-domain deleted factor VIII (FVIII) at the lowest possible vector dose to minimize the potential Risk of a capsid-mediated immune response in the clinical setting. Here, we describe the studies that identified the investigational agent SPK-8011, currently being evaluated in a phase 1/2 study (NCT03003533) in individuals with hemophilia A. In particular, the potency of our second-generation expression cassettes was evaluated in mice and in non-human primates using two different bioengineered capsids (AAV-Spark100 and AAV-Spark200). At 2 weeks after gene transfer, primates transduced with 2 × 1012 vg/kg AAV-Spark100-FVIII or AAV-Spark200-FVIII expressed FVIII antigen levels of 13% ± 2% and 22% ± 6% of normal, respectively. Collectively, these preclinical results validate the feasibility of lowering the AAV capsid dose for a gene-based therapeutic approach for hemophilia A to a dose level orders of magnitude lower than the first-generation vectors in the clinic.
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- 2022
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16. Anderson localization of light: Strong dependence with incident angle - Supplementary Information
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Jimenez-Villar, Ernesto, Xavier, M. C. S., Mestre, Valdeci, Martins, Weliton S., Basso, Gabriel F., Wetter, Niklaus U., and de Sa, Gilberto F.
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Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
This paper studies the transport of light for different incidence angles in a strongly disordered optical medium composed by core-shell nanoparticles (TiO2@Silica) suspended in ethanol solution. A decrease of optical conductance and an increase of absorption near the input border are reported when the incidence angle is increased. We associated this phenomenon to an increase of the density of localized states (localization increase) near the input border, which could be explained by a large increase of internal reflection with the incidence angle, which in turn would be a direct consequence of the enhancement of the effective refractive index near the input border by localization itself. The specular reflection, measured for the photons that enter the sample, is considerably lower than the effective internal reflection undergone by the coherently backscattered photons in the exact opposite direction, indicating a non-reciprocal propagation of light (mirror-symmetry breaking). This study represents a novel approach in order to understand the complex physics involved in a strongly disordered optical medium at the critical regime of approaching localization., Comment: Withdrawn as this submissions has been combined with arXiv:1705.09262
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- 2017
17. Anderson localization of light: Strong dependence with incident angle
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Jimenez-Villar, Ernesto, Xavier, M. C. S., Wetter, Niklaus U., Mestre, Valdeci, Martins, Weliton S., Basso, Gabriel F., Ermakov, V. A., Marques, F. C., and de Sa, Gilberto F.
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Condensed Matter - Mesoscale and Nanoscale Physics ,Physics - Optics - Abstract
This paper studies the transport of light for different incidence angles in a strongly disordered optical medium composed by core-shell nanoparticles (TiO2@Silica) suspended in ethanol solution. A decrease of optical conductance and an increase of absorption near the input border are reported when the incidence angle is increased. We associated this phenomenon to an increase of the density of localized states (localization increase) near the input border, which could be explained by a large increase of internal reflection with the incidence angle, which in turn would be a direct consequence of the enhancement of the effective refractive index near the input border by localization itself. The specular reflection, measured for the photons that enter the sample, is considerably lower than the effective internal reflection undergone by the coherently backscattered photons in the exact opposite direction, indicating a non-reciprocal propagation of light (mirror-symmetry breaking). This study represents a novel approach in order to understand the complex physics involved in a strongly disordered optical medium at the critical regime of approaching localization., Comment: In this lastest version of manuscript, new experiments were added and, additional ideas and concepts are introduced
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- 2017
18. Hepatic expression of GAA results in enhanced enzyme bioavailability in mice and non-human primates
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Helena Costa-Verdera, Fanny Collaud, Christopher R. Riling, Pauline Sellier, Jayme M. L. Nordin, G. Michael Preston, Umut Cagin, Julien Fabregue, Simon Barral, Maryse Moya-Nilges, Jacomina Krijnse-Locker, Laetitia van Wittenberghe, Natalie Daniele, Bernard Gjata, Jeremie Cosette, Catalina Abad, Marcelo Simon-Sola, Severine Charles, Mathew Li, Marco Crosariol, Tom Antrilli, William J. Quinn, David A. Gross, Olivier Boyer, Xavier M. Anguela, Sean M. Armour, Pasqualina Colella, Giuseppe Ronzitti, and Federico Mingozzi
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Science - Abstract
Pompe disease is currently treated with enzyme replacement therapy (ERT) with recombinant human acid alpha-glucosidase (GAA). Here, the authors show hepatic-directed gene therapy with AAV vectors enhances GAA bioavailability compared with ERT, resulting in improved rescue of the disease phenotype in mice and broad enzyme distribution in mice and non-human primates.
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- 2021
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19. Posttraumatic stress disorder in the World Mental Health Surveys
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Koenen, KC, Ratanatharathorn, A, Ng, L, McLaughlin, KA, Bromet, EJ, Stein, DJ, Karam, EG, Ruscio, A Meron, Benjet, C, Scott, K, Atwoli, L, Petukhova, M, Lim, CCW, Aguilar-Gaxiola, S, Al-Hamzawi, A, Alonso, J, Bunting, B, Ciutan, M, de Girolamo, G, Degenhardt, L, Gureje, O, Haro, JM, Huang, Y, Kawakami, N, Lee, S, Navarro-Mateu, F, Pennell, B-E, Piazza, M, Sampson, N, Have, M ten, Torres, Y, Viana, MC, Williams, D, Xavier, M, and Kessler, RC
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Biomedical and Clinical Sciences ,Biological Psychology ,Clinical and Health Psychology ,Clinical Sciences ,Psychology ,Prevention ,Clinical Research ,Behavioral and Social Science ,Mental Health ,Brain Disorders ,Violence Research ,Post-Traumatic Stress Disorder (PTSD) ,Anxiety Disorders ,Mental health ,Good Health and Well Being ,Adolescent ,Adult ,Age of Onset ,Aged ,Developed Countries ,Developing Countries ,Female ,Global Health ,Health Surveys ,Healthcare Disparities ,Humans ,Male ,Mental Health Services ,Middle Aged ,Prevalence ,Stress Disorders ,Post-Traumatic ,Vulnerable Populations ,World Health Organization ,Young Adult ,Epidemiology ,International ,Posttraumatic stress disorder ,trauma ,treatment ,Neurosciences ,Public Health and Health Services ,Psychiatry ,Clinical sciences ,Biological psychology ,Clinical and health psychology - Abstract
BackgroundTraumatic events are common globally; however, comprehensive population-based cross-national data on the epidemiology of posttraumatic stress disorder (PTSD), the paradigmatic trauma-related mental disorder, are lacking.MethodsData were analyzed from 26 population surveys in the World Health Organization World Mental Health Surveys. A total of 71 083 respondents ages 18+ participated. The Composite International Diagnostic Interview assessed exposure to traumatic events as well as 30-day, 12-month, and lifetime PTSD. Respondents were also assessed for treatment in the 12 months preceding the survey. Age of onset distributions were examined by country income level. Associations of PTSD were examined with country income, world region, and respondent demographics.ResultsThe cross-national lifetime prevalence of PTSD was 3.9% in the total sample and 5.6% among the trauma exposed. Half of respondents with PTSD reported persistent symptoms. Treatment seeking in high-income countries (53.5%) was roughly double that in low-lower middle income (22.8%) and upper-middle income (28.7%) countries. Social disadvantage, including younger age, female sex, being unmarried, being less educated, having lower household income, and being unemployed, was associated with increased risk of lifetime PTSD among the trauma exposed.ConclusionsPTSD is prevalent cross-nationally, with half of all global cases being persistent. Only half of those with severe PTSD report receiving any treatment and only a minority receive specialty mental health care. Striking disparities in PTSD treatment exist by country income level. Increasing access to effective treatment, especially in low- and middle-income countries, remains critical for reducing the population burden of PTSD.
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- 2017
20. Additively Manufactured Silicone Polymer Composite with High Hydrogen Getter Content and Hydrogen Absorption Capacity
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Adhikari, Santosh, primary, Safarik, Douglas J., additional, Stockdale, John R., additional, Torres, Xavier M., additional, Pacheco, Adam, additional, Legett, Shelbie A., additional, and Labouriau, Andrea, additional
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- 2024
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21. The Main Protease of Middle East Respiratory Syndrome Coronavirus Induces Cleavage of Mitochondrial Antiviral Signaling Protein to Antagonize the Innate Immune Response
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van Huizen, Mariska, primary, Vendrell, Xavier M., additional, de Gruyter, Heidi L. M., additional, Boomaars-van der Zanden, A. Linda, additional, van der Meer, Yvonne, additional, Snijder, Eric J., additional, Kikkert, Marjolein, additional, and Myeni, Sebenzile K., additional
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- 2024
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22. Deep learning prediction of BRAF-RAS gene expression signature identifies noninvasive follicular thyroid neoplasms with papillary-like nuclear features
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Dolezal, James M., Trzcinska, Anna, Liao, Chih-Yi, Kochanny, Sara, Blair, Elizabeth, Agrawal, Nishant, Keutgen, Xavier M., Angelos, Peter, Cipriani, Nicole A., and Pearson, Alexander T.
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- 2021
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23. Strain patterns in normal anterior talofibular and calcaneofibular ligaments and after anatomical reconstruction using gracilis tendon grafts: A cadaver study
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Masato Takao, Danielle Lowe, Satoru Ozeki, Xavier M. Oliva, Ryota Inokuchi, Takayuki Yamazaki, Yoshitaka Takeuchi, Maya Kubo, Kentaro Matsui, Mai Katakura, and Mark Glazebrook
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Anterior talofibular ligament ,Calcaneofibular ligament ,Miniaturization ligament performance probe ,Tension ,Diseases of the musculoskeletal system ,RC925-935 - Abstract
Abstract Background Inversion ankle sprains, or lateral ankle sprains, often result in symptomatic lateral ankle instability, and some patients need lateral ankle ligament reconstruction to reduce pain, improve function, and prevent subsequent injuries. Although anatomically reconstructed ligaments should behave in a biomechanically normal manner, previous studies have not measured the strain patterns of the anterior talofibular ligament (ATFL) and calcaneofibular ligament (CFL) after anatomical reconstruction. This study aimed to measure the strain patterns of normal and reconstructed ATFL and CFLs using the miniaturization ligament performance probe (MLPP) system. Methods The MLPP was sutured into the ligamentous bands of the ATFLs and CTLs of three freshly frozen cadaveric lower-extremity specimens. Each ankle was manually moved from 15° dorsiflexion to 30° plantar flexion, and a 1.2-N m force was applied to the ankle and subtalar joint complex. Results The normal and reconstructed ATFLs exhibited maximal strain (100) during supination in three-dimensional motion. Although the normal ATFLs were not strained during pronation, the reconstructed ATFLs demonstrated relative strain values of 16–36. During the axial motion, the normal ATFLs started to gradually tense at 0° plantar flexion, with the strain increasing as the plantar flexion angle increased, to a maximal value (100) at 30° plantar flexion; the reconstructed ATFLs showed similar strain patterns. Further, the normal CFLs exhibited maximal strain (100) during plantar flexion-abduction and relative strain values of 30–52 during dorsiflexion in three-dimensional motion. The reconstructed CFLs exhibited the most strain during dorsiflexion-adduction and demonstrated relative strain values of 29–62 during plantar flexion-abduction. During the axial motion, the normal CFLs started to gradually tense at 20° plantar flexion and 5° dorsiflexion. Conclusion Our results showed that the strain patterns of reconstructed ATFLs and CFLs are not similar to those of normal ATFLs and CFLs.
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- 2021
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24. Metastatic well-differentiated pancreatic neuroendocrine tumors to the liver: a narrative review of systemic and surgical management
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Tanaz Vaghaiwalla, Kelvin Memeh, Chih-Yi Liao, and Xavier M. Keutgen
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Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
Abstract. Pancreatic neuroendocrine tumors (PNETs) are a rare group of neoplasms originating from the endocrine pancreas. PNETs are classified as functional or non-functional tumors. PNETs are more often diagnosed at a higher stage with distant metastases or advanced locoregional disease. The majority of individuals with hepatic metastases will ultimately die of liver failure; therefore, the treatment of liver tumor burden is critical to providing a survival impact. While surgical resection remains the only chance of cure for disease confined to the pancreas or for locoregional disease, the treatment of advanced or metastatic PNETs is more complex and often requires a multimodal approach. This review focuses on treatment options for well and moderately differentiated PNETs with metastatic disease to the liver. These include surgery, liver-directed therapies including ablative and intra-arterial therapies, and systemic therapies such as somatostatin analogues, targeted therapies, chemotherapy, and peptide receptor radionuclide therapy. Developing an individualized treatment strategy requires careful assessment of liver tumor burden and predicted biological behavior. Aggressive surgical resection of hepatic metastases secondary to PNET primary tumors is associated with improved survival in multiple retrospective studies. General goals of treatment for metastatic disease include prolonging overall survival and progression free survival, improving quality of life, and control of symptoms.
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- 2021
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25. Synuclein impairs trafficking and signaling of BDNF in a mouse model of Parkinson's disease.
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Fang, Fang, Yang, Wanlin, Florio, Jazmin B, Rockenstein, Edward, Spencer, Brian, Orain, Xavier M, Dong, Stephanie X, Li, Huayan, Chen, Xuqiao, Sung, Kijung, Rissman, Robert A, Masliah, Eliezer, Ding, Jianqing, and Wu, Chengbiao
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Neurons ,Axons ,Animals ,Mice ,Transgenic ,Mice ,Parkinson Disease ,Disease Models ,Animal ,rab5 GTP-Binding Proteins ,Brain-Derived Neurotrophic Factor ,Signal Transduction ,Gene Expression ,Protein Transport ,Genes ,Reporter ,Synucleins ,alpha-Synuclein ,Molecular Imaging - Abstract
Recent studies have demonstrated that hyperphosphorylation of tau protein plays a role in neuronal toxicities of α-synuclein (ASYN) in neurodegenerative disease such as familial Alzheimer's disease (AD), dementia with Lewy bodies (DLB) and Parkinson's disease. Using a transgenic mouse model of Parkinson's disease (PD) that expresses GFP-ASYN driven by the PDGF-β promoter, we investigated how accumulation of ASYN impacted axonal function. We found that retrograde axonal trafficking of brain-derived neurotrophic factor (BDNF) in DIV7 cultures of E18 cortical neurons was markedly impaired at the embryonic stage, even though hyperphosphorylation of tau was not detectable in these neurons at this stage. Interestingly, we found that overexpressed ASYN interacted with dynein and induced a significant increase in the activated levels of small Rab GTPases such as Rab5 and Rab7, both key regulators of endocytic processes. Furthermore, expression of ASYN resulted in neuronal atrophy in DIV7 cortical cultures of either from E18 transgenic mouse model or from rat E18 embryos that were transiently transfected with ASYN-GFP for 72 hrs. Our studies suggest that excessive ASYN likely alters endocytic pathways leading to axonal dysfunction in embryonic cortical neurons in PD mouse models.
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- 2017
26. Osteoid osteoma: the great mimicker
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Bruno C. Carneiro, Isabela A. N. Da Cruz, Alípio G. Ormond Filho, Igor P. Silva, Júlio B. Guimarães, Flávio D. Silva, Marcelo A. C. Nico, and Xavier M. G. R. G. Stump
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Bone neoplasms ,Osteoma ,Osteoid ,Diagnosis ,Differential ,Magnetic resonance imaging ,Medical physics. Medical radiology. Nuclear medicine ,R895-920 - Abstract
Abstract Osteoid osteoma is a painful, benign and common bone tumor that is prevalent in young adults. The typical clinical presentation consists of pain that becomes worse at night and is relieved by nonsteroidal anti-inflammatory drugs. The most common imaging finding is a lytic lesion, known as a nidus, with variable intralesional mineralization, accompanied by bone sclerosis, cortical thickening and surrounding bone marrow edema, as well as marked enhancement with intravenous contrast injection. When the lesion is located in typical locations (intracortical bone and the diaphyses of long bones), both characteristic clinical and radiological features are diagnostic. However, osteoid osteoma is a multifaceted pathology that can have unusual presentations, such as intraarticular osteoid osteoma, epiphyseal location, lesions at the extremities and multicentric nidi, and frequently present atypical clinical and radiological manifestations. In addition, many conditions may mimic osteoid osteoma and vice versa, leading to misdiagnosis. Therefore, it is essential to understand these musculoskeletal diseases and their imaging findings to increase diagnostic accuracy, enable early treatment and prevent poor prognosis.
- Published
- 2021
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27. Disease gene discovery in male infertility: past, present and future
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Xavier, M. J., Salas-Huetos, A., Oud, M. S., Aston, K. I., and Veltman, J. A.
- Published
- 2021
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28. Hydro-mechanical fracture modeling governed by topological derivatives
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Xavier, M., Van Goethem, N., and Novotny, A.A.
- Published
- 2020
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29. Cooling the Coldest Continent: The 4 December 2021 Total Solar Eclipse over Antarctica
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Garreaud, René, primary, Bozkurt, Deniz, additional, Spangrude, Carl, additional, Carrasco-Escaff, Tomás, additional, Rondanelli, Roberto, additional, Muñoz, Ricardo, additional, Jubier, Xavier M., additional, Lazzara, Matthew, additional, Keller, Linda, additional, and Rojo, Patricio, additional
- Published
- 2023
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30. Interplay between Shelf Life and Printability of Silica-Filled Suspensions
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Torres, Xavier M., primary, Stockdale, John R., additional, Adhikari, Santosh, additional, Legett, Shelbie A., additional, Pacheco, Adam, additional, Guajardo, Jesus A., additional, and Labouriau, Andrea, additional
- Published
- 2023
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31. Entanglement spectrum and number fluctuations in the spin-partitioned BCS ground state
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Puspus, Xavier M., Villegas, Kristian Hauser, and Paraan, Francis N. C.
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Quantum Physics ,Condensed Matter - Statistical Mechanics ,Condensed Matter - Strongly Correlated Electrons - Abstract
We study entanglement between the spin components of the Bardeen-Cooper-Schrieffer (BCS) ground state by calculating the full entanglement spectrum and the corresponding von Neumann entanglement entropy. The entanglement spectrum is effectively modeled by a generalized Gibbs ensemble (GGE) of non-interacting electrons, which may be approximated by a canonical ensemble at the BCS critical temperature. We further demonstrate that the entanglement entropy is jointly proportional to the pairing energy and to the number of electrons about the Fermi surface (an area law). Furthermore, the entanglement entropy is also proportional to the number fluctuations of either spin component in the BCS state., Comment: 6 pages, 3 figures. Some additions and corrections made
- Published
- 2014
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32. Experimental Variables that Affect Human Hepatocyte AAV Transduction in Liver Chimeric Mice
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Chenhui Zou, Koen O.A. Vercauteren, Eleftherios Michailidis, Mohammad Kabbani, Irene Zoluthkin, Corrine Quirk, Luis Chiriboga, Mustafa Yazicioglu, Xavier M. Anguela, Philip Meuleman, Katherine A. High, Roland W. Herzog, and Ype P. de Jong
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humanized mice ,AAV ,gene therapy ,liver ,human hepatocytes ,donor variability ,Genetics ,QH426-470 ,Cytology ,QH573-671 - Abstract
Adeno-associated virus (AAV) vector serotypes vary in their ability to transduce hepatocytes from different species. Chimeric mouse models harboring human hepatocytes have shown translational promise for liver-directed gene therapies. However, many variables that influence human hepatocyte transduction and transgene expression in such models remain poorly defined. Here, we aimed to test whether three experimental conditions influence AAV transgene expression in immunodeficient, fumaryl-acetoactetate-hydrolase-deficient (Fah−/−) chimeric mice repopulated with primary human hepatocytes. We examined the effects of the murine liver injury cycle, human donor variability, and vector doses on hepatocyte transduction with various AAV serotypes expressing a green fluorescent protein (GFP). We determined that the timing of AAV vector challenge in the liver injury cycle resulted in up to 7-fold differences in the percentage of GFP expressing human hepatocytes. The GFP+ hepatocyte frequency varied 7-fold between human donors without, however, changing the relative transduction efficiency between serotypes for an individual donor. There was also a clear relationship between AAV vector doses and human hepatocyte transduction and transgene expression. We conclude that several experimental variables substantially affect human hepatocyte transduction in the Fah−/− chimera model, attention to which may improve reproducibility between findings from different laboratories.
- Published
- 2020
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33. Surgical treatment of non-functioning pancreatic neuroendocrine tumors: current controversies and challenges
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Kelvin O. Memeh, MD, MRCS, Tanaz Vaghaiwalla, MD, and Xavier M. Keutgen, MD, FACS
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Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
Abstract. There has been a rising trend in the incidence and prevalence of non-functioning pancreatic neuroendocrine tumors (NFPanNETs). While a significant number of the newly diagnosed NFPanNETs are asymptomatic, a majority of patients will present with liver metastasis (LM) at the time of diagnosis. Surgical resection remains the only curative treatment, especially for localized NFPanNETs. While a majority of small NFPanNETs are indolent, some are not. This heterogeneity in tumor biology presents the surgeon with the unique challenge of determining which patient will benefit from surgery, given the morbidity of pancreatic surgery. There has been a recent push for a more aggressive approach to the care of these patients, given the emergence of data supporting such measures. However, the risk of over or under treatment has generated immense debate amongst experts in the field. The heterogeneity of current practice guidelines and institutional practices around the world is a reflection of the disparate opinion on the management of NFPanNET. In this review, we set out to examine the evidence regarding some of the most controversial and challenging aspects of the surgical treatment of NFPanNET. We evaluate the following questions; should patients with small NFPanNETs ≤ 2 cm in size be resected; should patients with metastatic NFPanNETs undergo surgical debulking, and should there be resection of the primary tumor in the setting of non-resectable metastatic disease? Although there are currently no Level 1 data to answer these questions conclusively, we believe that the current literature supports a more aggressive approach to the management of NFPanNET.
- Published
- 2020
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34. Strain pattern of each ligamentous band of the superficial deltoid ligament: a cadaver study
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Masato Takao, Satoru Ozeki, Xavier M. Oliva, Ryota Inokuchi, Takayuki Yamazaki, Yoshitaka Takeuchi, Maya Kubo, Danielle Lowe, Kentaro Matsui, Mai Katakura, Ankle Instability Group, and Mark Glazebrook
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Tibionavicular ligament ,Tibiospring ligament ,Tibiocalcaneal ligament ,Superficial posterior tibiotalar ligament ,Diseases of the musculoskeletal system ,RC925-935 - Abstract
Abstract Background There are few reports on the detailed biomechanics of the deltoid ligament, and no studies have measured the biomechanics of each ligamentous band because of the difficulty in inserting sensors into the narrow ligaments. This study aimed to measure the strain pattern of the deltoid ligament bands directly using a Miniaturization Ligament Performance Probe (MLPP) system. Methods The MLPP was sutured into the ligamentous bands of the deltoid ligament in 6 fresh-frozen lower extremity cadaveric specimens. The strain was measured using a round metal disk (clock) fixed on the plantar aspect of the foot. The ankle was manually moved from 15° dorsiflexion to 30° plantar flexion, and a 1.2-N-m force was applied to the ankle and subtalar joint complex. Then the clock was rotated every 30° to measure the strain of each ligamentous band at each endpoint. Results The tibionavicular ligament (TNL) began to tense at 10° plantar flexion, and the tension becomes stronger as the angle increased; the TNL worked most effectively in plantar flex-abduction. The tibiospring ligament (TSL) began to tense gradually at 15° plantar flexion, and the tension became stronger as the angle increased. The TSL worked most effectively in abduction. The tibiocalcaneal ligament (TCL) began to tense gradually at 0° dorsiflexion, and the tension became stronger as the angle increased. The TCL worked most effectively in pronation (dorsiflexion-abduction). The superficial posterior tibiotalar ligament (SPTTL) began to tense gradually at 0° dorsiflexion, and the tension became stronger as the angle increased, with the SPTTL working most effectively in dorsiflexion. Conclusion Our results show the biomechanical function of the superficial deltoid ligament and may contribute to determining which ligament is damaged during assessment in the clinical setting.
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- 2020
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35. Hepatic expression of GAA results in enhanced enzyme bioavailability in mice and non-human primates
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Costa-Verdera, Helena, Collaud, Fanny, Riling, Christopher R., Sellier, Pauline, Nordin, Jayme M. L., Preston, G. Michael, Cagin, Umut, Fabregue, Julien, Barral, Simon, Moya-Nilges, Maryse, Krijnse-Locker, Jacomina, van Wittenberghe, Laetitia, Daniele, Natalie, Gjata, Bernard, Cosette, Jeremie, Abad, Catalina, Simon-Sola, Marcelo, Charles, Severine, Li, Mathew, Crosariol, Marco, Antrilli, Tom, Quinn, III, William J., Gross, David A., Boyer, Olivier, Anguela, Xavier M., Armour, Sean M., Colella, Pasqualina, Ronzitti, Giuseppe, and Mingozzi, Federico
- Published
- 2021
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36. Osteoid osteoma: the great mimicker
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Carneiro, Bruno C., Da Cruz, Isabela A. N., Ormond Filho, Alípio G., Silva, Igor P., Guimarães, Júlio B., Silva, Flávio D., Nico, Marcelo A. C., and Stump, Xavier M. G. R. G.
- Published
- 2021
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37. Strain patterns in normal anterior talofibular and calcaneofibular ligaments and after anatomical reconstruction using gracilis tendon grafts: A cadaver study
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Takao, Masato, Lowe, Danielle, Ozeki, Satoru, Oliva, Xavier M., Inokuchi, Ryota, Yamazaki, Takayuki, Takeuchi, Yoshitaka, Kubo, Maya, Matsui, Kentaro, Katakura, Mai, and Glazebrook, Mark
- Published
- 2021
- Full Text
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38. In Vitro Intestinal Uptake And Permeability Of Fluorescently-Labelled Hyaluronic Acid Nanogels
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Xavier M, García-Hevia L, Amado IR, Pastrana L, and Gonçalves C
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oral delivery ,in vitro models ,nanogels ,intestinal permeability ,cellular uptake ,Medicine (General) ,R5-920 - Abstract
Miguel Xavier,1 Lorena García-Hevia,1 Isabel R Amado,1,2 Lorenzo Pastrana,1 Catarina Gonçalves1 1Department of Life Sciences, International Iberian Nanotechnology Laboratory, Braga 4715-330, Portugal; 2Department of Food and Analytical Chemistry, Faculty of Sciences, University of Vigo, Ourense 32004, SpainCorrespondence: Catarina GonçalvesDepartment of Life Sciences, International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga s/n, Braga 4715-330, PortugalEmail catarina.goncalves@inl.intBackground: Oral administration remains the most common mode of drug delivery. However, orally administered bioactive compounds must first survive digestion and then be absorbed at the intestine in order to reach other tissues or organs. The efficiency of both processes can be improved by encapsulation or conjugation with polymeric nanoparticles. Here we report the synthesis of amphiphilic hyaluronic acid (HyA) nanogels as nanocarriers for drug delivery.Methods: HyA nanogels were prepared by self-assembly from amphiphilic HyA conjugates produced by grafting hydrophobic alkyl chains to the HyA backbone. The dye Cy5.5 was covalently bonded and used for tracking. The nanogels were characterised according to their structure, size and zeta potential, as well as biocompatibility towards an intestinal epithelial cell line. The uptake and intestinal permeability of the nanogels were assessed using in vitro models, which physiological relevance was verified regarding the morphology of the epithelium, the production of mucus, the expression of occludin and the transepithelial electrical resistance.Results: The covalent binding of Cy5.5 did not affect significantly the size and surface charge of the nanogels at 125.1 ± 3.2 nm and −57.6 ± 6.2 mV respectively after labelling. Studies of biocompatibility showed that the nanogels were non-toxic to Caco-2 cells up to the concentration of 0.1 mg∙mL−1. The presence of mucus affected the nanogel uptake and highlighted the importance of considering mucus-producing cells in in vitro intestinal models. The uptake or adsorption to a Caco-2/HT29-MTX co-culture (8.1%) was higher than with single Caco-2 cell cultures (4.3%). Interestingly, both models led to minute (
- Published
- 2019
39. IgG-cleaving endopeptidase enables in vivo gene therapy in the presence of anti-AAV neutralizing antibodies
- Author
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Leborgne, Christian, Barbon, Elena, Alexander, Jeffrey M., Hanby, Hayley, Delignat, Sandrine, Cohen, Daniel M., Collaud, Fanny, Muraleetharan, Saghana, Lupo, Dan, Silverberg, Joseph, Huang, Karen, van Wittengerghe, Laetitia, Marolleau, Béatrice, Miranda, Adeline, Fabiano, Anna, Daventure, Victoria, Beck, Heena, Anguela, Xavier M., Ronzitti, Giuseppe, Armour, Sean M., Lacroix-Desmazes, Sebastien, and Mingozzi, Federico
- Published
- 2020
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40. Baseline metabolic profiles of early rheumatoid arthritis patients achieving sustained drug-free remission after initiating treat-to-target tocilizumab, methotrexate, or the combination: insights from systems biology
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Xavier M Teitsma, Wei Yang, Johannes W G Jacobs, Attila Pethö-Schramm, Michelle E A Borm, Amy C Harms, Thomas Hankemeier, Jacob M van Laar, Johannes W J Bijlsma, and Floris P J G Lafeber
- Subjects
Rheumatoid arthritis ,Tocilizumab ,Methotrexate ,Drug-free remission ,Metabolomics ,Diseases of the musculoskeletal system ,RC925-935 - Abstract
Abstract Background We previously identified, in newly diagnosed rheumatoid arthritis (RA) patients, networks of co-expressed genes and proteomic biomarkers associated with achieving sustained drug-free remission (sDFR) after treatment with tocilizumab- or methotrexate-based strategies. The aim of this study was to identify, within the same patients, metabolic pathways important for achieving sDFR and to subsequently study the complex interactions between different components of the biological system and how these interactions might affect the therapeutic response in early RA. Methods Serum samples were analyzed of 60 patients who participated in the U-Act-Early trial (ClinicalTrials.gov number NCT01034137) and initiated treatment with methotrexate, tocilizumab, or the combination and who were thereafter able to achieve sDFR (n = 37); as controls, patients were selected who never achieved a drug-free status (n = 23). Metabolomic measurements were performed using mass spectrometry on oxidative stress, amine, and oxylipin platforms covering various compounds. Partial least square discriminant analyses (PLSDA) were performed to identify, per strategy arm, relevant metabolites of which the biological pathways were studied. In addition, integrative analyses were performed correlating the previously identified transcripts and proteins with the relevant metabolites. Results In the tocilizumab plus methotrexate, tocilizumab, and methotrexate strategy, respectively, 19, 13, and 12 relevant metabolites were found, which were subsequently used for pathway analyses. The most significant pathway in the tocilizumab plus methotrexate strategy was “histidine metabolism” (p
- Published
- 2018
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41. Examination of isotropy assumption in isogrid structures through analysis and experimentation on four isogrid variations
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Xavier M. Delgado and Craig G. Merrett
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Aerospace Engineering - Published
- 2023
42. Review of Daniel P. Castillo, 'An Ecological Theology of Liberation: Salvation and Political Ecology'
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Xavier M. Montecel
- Subjects
Moral theology ,BV4625-4780 - Abstract
Review of Daniel P. Castillo, _An Ecological Theology of Liberation: Salvation and Political Ecology
- Published
- 2021
43. A simplified model of fracking based on the topological derivative concept
- Author
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Xavier, M., Goethem, N. Van, and Novotny, A.A.
- Published
- 2018
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44. Prognostic Utility of Total 68Ga-DOTATATE-Avid Tumor Volume in Patients With Neuroendocrine Tumors
- Author
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Tirosh, Amit, Papadakis, Georgios Z., Millo, Corina, Hammoud, Dima, Sadowski, Samira M., Herscovitch, Peter, Pacak, Karel, Marx, Stephen J., Yang, Lily, Nockel, Pavel, Shell, Jasmine, Green, Patience, Keutgen, Xavier M., Patel, Dhaval, Nilubol, Naris, and Kebebew, Electron
- Published
- 2018
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45. Crack Growth Control Based on the Topological Derivative of the Rice’s Integral
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Xavier, M., Novotny, A. A., and Sokołowski, J.
- Published
- 2019
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46. Using whole-genome sequencing data to derive the homologous recombination deficiency scores
- Author
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de Luca, Xavier M., Newell, Felicity, Kazakoff, Stephen H., Hartel, Gunter, McCart Reed, Amy E., Holmes, Oliver, Xu, Qinying, Wood, Scott, Leonard, Conrad, Pearson, John V., Lakhani, Sunil R., Waddell, Nicola, Nones, Katia, and Simpson, Peter T.
- Published
- 2020
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47. Clinicopathologic significance of nuclear HER4 and phospho-YAP(S) in human breast cancers and matching brain metastases
- Author
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Priyakshi Kalita-de Croft, Malcolm Lim, Haarika Chittoory, Xavier M. de Luca, Jamie R. Kutasovic, Bryan W. Day, Fares Al-Ejeh, Peter T. Simpson, Amy E. McCart Reed, Sunil R. Lakhani, and Jodi M. Saunus
- Subjects
Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Background: Human epidermal growth factor receptor-4 (HER4) and yes-associated protein-1 (YAP) are candidate therapeutic targets in oncology. YAP’s transcriptional coactivation function is modulated by the HER4 intracellular domain (HER4-ICD) in vitro , but the clinical relevance of this has not been established. This study investigated the potential for targeting the HER4-YAP pathway in brain metastatic breast cancer. Methods: We performed immuno-phenotypic profiling of pathway markers in a consecutive breast cancer series with 25 years of clinical follow up ( n = 371), and patient-matched breast and metastatic brain tumours ( n = 91; 30 pairs). Results: Membrane localisation of phospho-HER4 [pHER4(Y 1162 )] was infrequent in primary breast cancer, but very frequent in brain metastases (5.9% versus 75% positive), where it was usually co-expressed with pHER3(Y 1289 ) ( p
- Published
- 2020
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48. Comprehensive exploratory autoantibody profiling in patients with early rheumatoid arthritis treated with methotrexate or tocilizumab.
- Author
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Xavier M Teitsma, Jenny Devenport, Johannes W G Jacobs, Attila Pethö-Schramm, Michelle E A Borm, Petra Budde, Johannes W J Bijlsma, and Floris P J G Lafeber
- Subjects
Medicine ,Science - Abstract
BackgroundWe sought to identify immunoglobin G autoantibodies predictive of early treatment response to methotrexate, the recommended first-line therapy for patients with newly diagnosed rheumatoid arthritis, and to the interleukin-6 receptor inhibitor biologic tocilizumab, initiated as the first disease-modifying anti-rheumatic drug.Materials and methodsIn baseline sera of a subset of patients with newly diagnosed rheumatoid arthritis in the U-Act-Early study, selected based on specific responder/non-responder criteria using the Disease Activity Score assessing 28 joints (DAS28) within the first 20 weeks, we measured immunoglobin G antibody reactivity against 463 protein antigens and performed supervised cluster analysis to identify predictive autoantibodies for treatment response. The analysis subset comprised 56 patients in the methotrexate arm (22 responders, 34 non-responders) and 50 patients in the tocilizumab arm (34 responders, 16 non-responders). For comparison, these analyses were also performed in 50 age- and gender-matched healthy controls.ResultsIncreased reactivity in responders versus non-responders was found in the methotrexate arm against two antigens-DOT1-like histone lysine methyltransferase (p = 0.009) and tropomyosin (p = 0.003)-and in the tocilizumab arm against one antigen-neuro-oncological ventral antigen 2 (p = 0.039). Decreased reactivity was detected against two antigens in the methotrexate arm-G1 to S phase transition 2 (p = 0.023) and the zinc finger protein ZPR1 (p = 0.021). Reactivity against the identified antigens was not statistically significant in either treatment arm for patients with rheumatoid factor-positive versus-negative or anti-cyclic citrullinated test-positive versus test-negative rheumatoid arthritis (p ≥ 0.06).ConclusionsComprehensive profiling of baseline sera revealed several novel immunoglobin G autoantibodies associated with early treatment response to methotrexate and to tocilizumab in disease-modifying anti-rheumatic drug-naive patients with rheumatoid arthritis. These findings could eventually yield clinically relevant predictive markers, if corroborated in different patient cohorts, and may facilitate future benefit in personalised healthcare.
- Published
- 2020
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49. Topological derivative-based fracture modelling in brittle materials: A phenomenological approach
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Xavier, M., Fancello, E.A., Farias, J.M.C., Van Goethem, N., and Novotny, A.A.
- Published
- 2017
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50. Eucharist, Synodality, and Ethics: Making Connections.
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Montecel, Xavier M.
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LORD'S Supper , *ETHICS , *CHURCH renewal , *VIRTUE ethics , *RITES & ceremonies , *SOCIAL order , *BAPTISM - Abstract
The central premise of this article is that synodality ought to be grounded in the Eucharist. The author explores the implications of this claim in the areas of ecclesiology and ethics. On the side of ecclesiology, the author argues that the Eucharist is the ritual and theological center of a synodal church. In the context of its own life, considered not only at an abstract theological level but at a practical and political level as well, the church cannot be synodal if it is not attentive to its Eucharistic origins. Synodality is the key in which communion is realized. The author discusses this idea in the context of the Eucharist Revival in the United States and in connection to baptism and the ecclesiology of the People of God. On the side of ethics, the author develops an account of synodality as a virtue. Synodality is the virtue that shapes the church and its members in order to realize communion. Its object is the right use of power. An ethics of synodality, the author argues, entails both reform in the church itself and a commitment on the part of the church and its members to a politics of the universal common good and the building of a just social order. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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