441 results on '"Xavier, M."'
Search Results
2. 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
3. Systemic and Ocular Adverse Events with Intravitreal Anti-VEGF Therapy Used in the Treatment of Diabetic Retinopathy: a Review
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Jason A. Zehden, Xavier M. Mortensen, Ashvini Reddy, and Alice Yang Zhang
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Endocrinology, Diabetes and Metabolism ,Internal Medicine - Published
- 2022
4. Multiscale approach for the analysis of composite connections and stiffeners in marine shell structures
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Francesc, T., Fermin, O., and Xavier, M.
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- 2023
5. The Influence of Organizational Culture on the Job Satisfaction of Insurance Companies' Employees
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Hyacinth N. Castillo, Ralph Justin C. Hermogenes, Anne Margarette L. Oliva, Alexis Gabrielle N. Juliales, Joshua Ullrich S. Nieto, Railey Alexander DI. Mendoza, Lorenzo Danilo V. Sindayen, Khymn Xavier M. Esteban, Jared Gerick Kyle D.C. Marcelino, and Jhoselle Tus
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insurance agents ,organizational culture ,practices ,organization ,job satisfaction - Abstract
The emergence of different organizational cultures inside companies has been found to impact their overall success. It is the set of beliefs, values, and customs present in a workplace that influences the behavior of its employees. Meanwhile, job satisfaction is the employees’ contentment level with respect to different aspects of their job. Hence, this study employed a descriptive-correlational research design to investigate organizational culture's influence on insurance agents' job satisfaction. To gather the essential data and meet the objectives of this study, the Organizational Culture Assessment Instrument and Job Satisfaction Survey were distributed to the respondents. The data gathered were then computed and analyzed using regression analysis, revealing that organizational culture significantly influences satisfaction among insurance agents. These results were analyzed and interpreted, with implications and recommendations provided for better understanding and application for the stakeholders of this study.
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- 2023
- Full Text
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6. Number of Hepatic Resections and Association with Complication after Metastatic Neuroendocrine Tumor Debulking: An American College of Surgeons NSQIP Database Study
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Jason L Schwarz, Kristine M Kuchta, Aram Rojas, Syed Mehdi, Sung Hoon Choi, Xavier M Keutgen, Mark S Talamonti, and Melissa E Hogg
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Surgery - Published
- 2023
7. Data from A Panel of Four miRNAs Accurately Differentiates Malignant from Benign Indeterminate Thyroid Lesions on Fine Needle Aspiration
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Thomas J. Fahey, Olivier Elemento, Rasa Zarnegar, Martha A. Zeiger, David Cooper, Daniel Buitrago, Rana Hoda, Theresa Scognamiglio, Yongchun Wang, Michael J. Crowley, Filippo Filicori, and Xavier M. Keutgen
- Abstract
Purpose: Indeterminate thyroid lesions on fine needle aspiration (FNA) harbor malignancy in about 25% of cases. Hemi- or total thyroidectomy has, therefore, been routinely advocated for definitive diagnosis. In this study, we analyzed miRNA expression in indeterminate FNA samples and determined its prognostic effects on final pathologic diagnosis.Experimental Design: A predictive model was derived using 29 ex vivo indeterminate thyroid lesions on FNA to differentiate malignant from benign tumors at a tertiary referral center and validated on an independent set of 72 prospectively collected in vivo FNA samples. Expression levels of miR-222, miR-328, miR-197, miR-21, miR-181a, and miR-146b were determined using reverse transcriptase PCR. A statistical model was developed using the support vector machine (SVM) approach.Results: A SVM model with four miRNAs (miR-222, miR-328, miR-197, and miR-21) was initially estimated to have 86% predictive accuracy using cross-validation. When applied to the 72 independent in vivo validation samples, performance was actually better than predicted with a sensitivity of 100% and specificity of 86%, for a predictive accuracy of 90% in differentiating malignant from benign indeterminate lesions. When Hurthle cell lesions were excluded, overall accuracy improved to 97% with 100% sensitivity and 95% specificity.Conclusions: This study shows that that the expression of miR-222, miR-328, miR-197, and miR-21 combined in a predictive model is accurate at differentiating malignant from benign indeterminate thyroid lesions on FNA. These findings suggest that FNA miRNA analysis could be a useful adjunct in the management algorithm of patients with thyroid nodules. Clin Cancer Res; 18(7); 2032–8. ©2012 AACR.
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- 2023
8. Supplementary Table 2 from A Panel of Four miRNAs Accurately Differentiates Malignant from Benign Indeterminate Thyroid Lesions on Fine Needle Aspiration
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Thomas J. Fahey, Olivier Elemento, Rasa Zarnegar, Martha A. Zeiger, David Cooper, Daniel Buitrago, Rana Hoda, Theresa Scognamiglio, Yongchun Wang, Michael J. Crowley, Filippo Filicori, and Xavier M. Keutgen
- Abstract
PDF file - 78K
- Published
- 2023
9. Supplementary Table 1 from A Panel of Four miRNAs Accurately Differentiates Malignant from Benign Indeterminate Thyroid Lesions on Fine Needle Aspiration
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Thomas J. Fahey, Olivier Elemento, Rasa Zarnegar, Martha A. Zeiger, David Cooper, Daniel Buitrago, Rana Hoda, Theresa Scognamiglio, Yongchun Wang, Michael J. Crowley, Filippo Filicori, and Xavier M. Keutgen
- Abstract
PDF file - 76K
- Published
- 2023
10. Single Center Outcomes from Parenchymal-sparing Resections and Microwave Ablations for Neuroendocrine Tumor Liver Metastases
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Frances T. Lee, Jelani Williams, Rachel Nordgren, Jason L. Schwarz, Namrata Setia, Kevin Roggin, Blase Polite, Govind Rangrass, Chih-Yi Liao, J. Michael Millis, and Xavier M. Keutgen
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Background: Surgical debulking of neuroendocrine tumor (NET) is used as a therapeutic approach for metastatic NETs in selected centers. Reported outcomes after parenchymal-sparing liver resections (PSR) in NET patients with high numbers of liver metastases are sparse. Methods: NET patients that underwent surgical debulking from 2019 to 2021 were reviewed. Trends in perioperative liver function was examined, as well as symptom response, complications, and progression free survival. Results: 1069 liver lesions (median=17) were debulked from 53 patients with a combination of PSR (45%) and ultrasound-guided microwave ablations (MWA) (55%). Post-operative transaminitis was proportional to the number of lesions debulked: Median POD1 AST was 681 IU/L for 1-15 lesions vs. 1396 IU/L for >15 lesions, p=0.01 (R2=0.271, pp=0.01 (R2=0.221, p9/L for 1-15 lesions vs. 109 x 109/L for >15 lesions, p=0.04; R2=0.163, p=0.003). Synthetic liver function measured by postoperative INR (median POD1 INR 1.3 vs 1.4, p=0.21) and total bilirubin (median POD 2 TB 1.35 vs 0.95 mg/dL; p=0.67) did not differ according to number of lesions debulked. 13% of patients sustained a Clavien-Dindo grade 3/4 complication which was not associated with the number of lesions targeted. All patients with preoperative symptoms had improvement after surgery. Median time to recurrence was 10.9 months. Conclusions: PSR with MWA for large numbers of NET liver metastases is safe and effective for symptom control and does not affect synthetic liver function. Transaminitis and thrombocytopenia are proportionate to the amount of liver lesions debulked.
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- 2023
11. Loss of MEN1 function impairs DNA repair capability of pancreatic neuroendocrine tumors
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Olga Lakiza, Julian Lutze, Alyx Vogle, Jelani Williams, Abde Abukdheir, Paul Miller, Chih-Yi ‘Andy’ Liao, Sean P Pitroda, Carlos Martinez, Andrea Olivas, Namrata Setia, Stephen J Kron, Ralph R Weichselbaum, and Xavier M Keutgen
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congenital, hereditary, and neonatal diseases and abnormalities ,endocrine system ,Cancer Research ,DNA Repair ,endocrine system diseases ,Endocrinology, Diabetes and Metabolism ,Poly(ADP-ribose) Polymerase Inhibitors ,Article ,Pancreatic Neoplasms ,Neuroendocrine Tumors ,Endocrinology ,Oncology ,Proto-Oncogene Proteins ,Humans ,Poly(ADP-ribose) Polymerases - Abstract
Somatic MEN1 mutations occur in up to 50% of pancreatic neuroendocrine tumors (PanNETs). Clinical studies have shown that radiation therapy (IR) is effective in a subset of PanNETs, but it remains unclear why some patients respond better to IR than others. Herein, we study whether MEN1 loss of function increases radiosensitivity of PanNETs and determine its effect on DNA double-strand break (DSB) repair. After creating a MEN1 knockout PanNET cell line, we confirmed reduced DSB repair capacity in MEN1-deficient cells and linked these findings to a defect in homologous recombination, as well as reduced BRCA2 expression levels. Consistent with this model, we found that MEN1 mutant cells displayed increased sensitivity to the highly trapping poly (ADP-ribose) polymerase (PARP) 1 inhibitor talazoparib in vitro. Our results suggest that combining IR with PARP inhibition may be beneficial in patients with PanNETs and MEN1 loss of function.
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- 2022
12. Preclinical assessment of an optimized AAV-FVIII vector in mice and non-human primates for the treatment of hemophilia A
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Sean M. Armour, Mallory Willet, Marti A. DiPietro, Marco Crosariol, Stephanie Kutza, Raffaella Toso, Chuansong Wang, Katherine A. High, Robert J. Davidson, Jennifer Frick, Xavier M. Anguela, Liron Elkouby, Yuhuan Wang, Giang N. Nguyen, Denise E. Sabatino, and Joseph Silverberg
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optimized vectors ,viruses ,Genetic enhancement ,Transgene ,QH426-470 ,codon optimization ,Immune system ,Genetics ,Potency ,Medicine ,Vector (molecular biology) ,Molecular Biology ,Gene ,QH573-671 ,business.industry ,AAV ,Orders of magnitude (mass) ,low AAV dose ,Capsid ,Immunology ,Molecular Medicine ,Original Article ,hemophilia A ,Cytology ,business ,preclinical development - 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., Graphical Abstract, The studies presented here represent the proof-of-concept work that generated the investigational agent SPK-8011, currently being evaluated in a phase 1/2 study (NCT03003533) for treatment of hemophilia A. Through a multi-pronged optimization approach, an adeno-associated viral vector capable of expressing therapeutic levels of hFVIII at the lowest possible vector dose was generated.
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- 2022
13. Management recommendations for pancreatic manifestations of von Hippel–Lindau disease
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Thorvardur R. Halfdanarson, Xavier M. Keutgen, Dhaval Patel, Anthony B. Daniels, Pascal Hammel, Thera P. Links, Shachar Laks, Naris Nilubol, Amit Tirosh, Rachel S van Leeuwaarde, Guided Treatment in Optimal Selected Cancer Patients (GUTS), and Damage and Repair in Cancer Development and Cancer Treatment (DARE)
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Cancer Research ,medicine.medical_specialty ,von Hippel-Lindau Disease ,endocrine system diseases ,Adrenal Gland Neoplasms ,Disease ,Pheochromocytoma ,Neuroendocrine tumors ,urologic and male genital diseases ,Renal cell carcinoma ,von Hippel–Lindau ,Hemangioblastoma ,medicine ,Humans ,pancreas ,Von Hippel–Lindau disease ,Intensive care medicine ,neoplasms ,business.industry ,Cancer ,Evidence-based medicine ,medicine.disease ,female genital diseases and pregnancy complications ,Kidney Neoplasms ,Pancreatic Neoplasms ,medicine.anatomical_structure ,Oncology ,Von Hippel-Lindau Tumor Suppressor Protein ,recommendations ,surveillance ,Female ,Pancreas ,business ,neuroendocrine tumor - Abstract
Von Hippel–Lindau disease (VHL) is a multineoplasm inherited disease manifesting with hemangioblastoma of the central nervous system and retina, adrenal pheochromocytoma, renal cell carcinoma, pancreatic neuroendocrine tumors and cysts, and neoplasms/cysts of the ear, broad ligament, and testicles. During 2018-2020, the VHL Alliance gathered several committees of experts in the various clinical manifestations of VHL to review the literature, gather the available evidence on VHL, and develop recommendations for patient management. The current report details the results of the discussion of a group of experts in the pancreatic manifestations of VHL along with their proposed recommendations for the clinical surveillance and management of patients with VHL. The recommendations subcommittee performed a comprehensive systematic review of the literature and conducted panel discussions to reach the current recommendations. The level of evidence was defined according to the Shekelle variation of the Grading of Recommendations, Assessment, Development, and Evaluation grading system. The National Comprehensive Cancer Network Categories of Evidence and Consensus defined the committee members' interpretation of the evidence and degree of consensus. The recommendations encompass the main aspects of VHL-related pancreatic manifestations and their clinical management. They are presented in a clinical orientation, including general planning of screening and surveillance for pancreatic neuroendocrine tumors, utility of biochemical biomarkers, the optimal choice for imaging modality, indirect risk stratification, indications for tissue sampling of VHL-related pancreatic neuroendocrine tumors, and interventions. These recommendations are designed to serve as the reference for all aspects of the screening, surveillance, and management of VHL-related pancreatic manifestations.
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- 2022
14. Connecting Cohorts to Diminish Alzheimer’s Disease (CONCORD-AD): A Report of an International Research Collaboration Network
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Samantha C. Burnham, Valory N. Pavlik, Rachelle Doody, Catherine Helmer, Ronald C. Petersen, Karine Pérès, Preciosa M. Coloma, Oskar Hansson, Sebastian Palmqvist, Lesley M. Butler, Joseph S. Kass, Maria Vassilaki, Mary Sano, Erik Stomrud, Colin L. Masters, Xavier M Teitsma, Jean-François Dartigues, Concord-Ad investigators, Baylor College of Medicine (BCM), Baylor University, CSIRO Health and Biosecurity [Australia], Commonwealth Scientific and Industrial Research Organisation [Canberra] (CSIRO), Bordeaux population health (BPH), Université de Bordeaux (UB)-Institut de Santé Publique, d'Épidémiologie et de Développement (ISPED)-Institut National de la Santé et de la Recherche Médicale (INSERM), Lund University [Lund], Skane University Hospital [Lund], Mayo Clinic [Rochester], CHU Bordeaux [Bordeaux], University of Melbourne, F. Hoffmann-La Roche [Basel], Genentech, Inc. [San Francisco], Icahn School of Medicine at Mount Sinai [New York] (MSSM), James J. Peters VA Medical Center [New York], CONCORD-AD investigators, and Admin, Oskar
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Gerontology ,Population ageing ,International Cooperation ,Population ,Disease ,Cohort Studies ,Computer Communication Networks ,Cognition ,Alzheimer Disease ,Observational study ,medicine ,Humans ,Dementia ,education ,Aged ,education.field_of_study ,General Neuroscience ,Cohort ,General Medicine ,medicine.disease ,Population characteristics ,Observational Studies as Topic ,Psychiatry and Mental health ,Clinical Psychology ,[SDV.SPEE] Life Sciences [q-bio]/Santé publique et épidémiologie ,[SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie ,Cognitive function ,Geriatrics and Gerontology ,Psychology ,Alzheimer’s disease ,Biomarkers ,CONCORD-AD network ,Cohort study - Abstract
International audience; Longitudinal observational cohort studies are being conducted worldwide to understand cognition, biomarkers, and the health of the aging population better. Cross-cohort comparisons and networks of registries in Alzheimer's disease (AD) foster scientific exchange, generate insights, and contribute to the evolving clinical science in AD. A scientific working group was convened with invited investigators from established cohort studies in AD, in order to form a research collaboration network as a resource to address important research questions. The Connecting Cohorts to Diminish Alzheimer's Disease (CONCORD-AD) collaboration network was created to bring together global resources and expertise, to generate insights and improve understanding of the natural history of AD, to inform design of clinical trials in all disease stages, and to plan for optimal patient access to disease-modifying therapies once they become available. The network brings together expertise and data insights from 7 cohorts across Australia, Europe, and North America. Notably, the network includes populations recruited through memory clinics as well as population-based cohorts, representing observations from individuals across the AD spectrum. This report aims to introduce the CONCORD-AD network, providing an overview of the cohorts involved, reporting the common assessments used, and describing the key characteristics of the cohort populations. Cohort study designs and baseline population characteristics are compared, and available cognitive, functional, and neuropsychiatric symptom data, as well as the frequency of biomarker assessments, are summarized. Finally, the challenges and opportunities of cross-cohort studies in AD are discussed.
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- 2022
15. All-Trans Retinoic Acid Radiosensitizes Neuroendocrine Tumor Cells via Peptidyl-Prolyl Cis-Trans Isomerase 1 Inhibition
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Jelani K. Williams, Jason L. Schwarz, Olga Lakiza, Stephen Kron, Ralph R Weichselbaum, and Xavier M. Keutgen
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- 2023
16. Inhibition of Estrogen Receptor Alpha Radiosensitizes Neuroendocrine Tumors
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Jason L. Schwarz, Jelani K. Williams, Olga Lakiza, Stephen J. Kron, Ralph R. Weichselbaum, and Xavier M. Keutgen
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- 2023
17. Lisa Allen, A Womanist Theology of Worship: Liturgy, Justice, and Communal Righteousness
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Xavier M. Montecel
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A review of Lisa Allen, A Womanist Theology of Worship: Liturgy, Justice, and Communal Righteousness.
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- 2023
18. PEDAGOGIA DO PARADESPORTO
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Alessandro Tosim, Aline Miranda Strapasson, Altemir Tramp, André Xavier M. Alvares, Bruna Bredariol, Eduardo Leonel, Elke Lima Trigo, Ester Noguera, Fabiano Quirino da Silva Pereira, Flávio Anderson Pedrosa de Melo, Jacqueline Martins Patatas, João Paulo Casteleti de Souza, José Agtônio Guedes Dantas, José Paulo Sabadini de Lima, Larissa Rafaela Galatti, Leandro Ribela, Luis Felipe Castelli Correia de Campos, Luís Gustavo de Souza Pena, Marcio Pereira Morato, Marcos Motta Miranda, Mariana Simões Pimentel Gomes, Mário Antônio de Moura Simim, Mariane Ferreira, Mariona Masdemont, Marta Cristina Lopes, Mey de Abreu van Munster, Murilo Arsenio Spina, Paulo Cesar Montagner, Paulo Alberto Veiga Cabral, Raphael Moreira de Almeida, Rosecler Ravache, Rubens Venditti Junior, Sylvana Mestre, Taylor Brian Lavinscky Pereira, Thiago Pupo Fonseca, Vagner Lopes Lima, and Miguel de Arruda
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- 2023
19. Relationship between the Adherence to National Competency-Based Standards and the Professional Profile of School Heads in Northern Samar, Philippines
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Xavier M. Ultra
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Medical education ,Political science ,education ,Geography, Planning and Development ,Management, Monitoring, Policy and Law ,health care economics and organizations - Abstract
A descriptive study sought to determine the school heads’ adherence to the national competency-based standards and its relationship to the professional profile of the school heads in the Division of Northern Samar was done. This study used the descriptive-correlational research design which the questionnaire was patterned from studies on leadership and National Competency-Based Standards for School Heads (NCBS-SH) TDNA tool. Elementary schools were proportionally sampled by district/municipality while secondary schools were proportionally sampled by legislative districts of the province of Northern Samar. The respondents answered a survey questionnaire developed from the standards of Department of Education. This study found out that most of the school heads have earned master’s degree, are principal’s test passers, had more than 10 years of administrative and supervisory experience and had limited number of exposures to trainings. All the indicators of leadership skills were very highly observed. On the test of relationship between the professional profile of the school heads and their adherence to National Competency-Based Standards, administrative and supervisory experience and NCBS-SH domains on school leadership, instructional leadership, HR management and professional development were found to be significantly correlated. Also, administrative, and supervisory trainings attended and NCBS-SH domains on school leadership, instructional leadership, HR management and professional development were found to be significantly correlated. Respondents’ leadership skills and NCBS-SH domains, leadership skills have significant correlation to all the NCBS-SH domains. From the test of relationship between the professional profile of the school heads and the school performance, only eligibility and administrative and supervisory experience are significantly correlated to SBM level of practice. The test of relationships between school heads’ adherence to national competency-based standards and school performance, the school leadership is significantly correlated to SBM level of practice.
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- 2021
20. Dynamic functional connectivity in migraine during the interictal phase: a resting-state fMRI study
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Esteves, I., Fonseca, C., Xavier, M., Fouto, A., Ruiz-Tagle, A., Caetano, G., Nunes, R., Gil-Gouveia, R., Cabral, J., Martins, I. Pavão, Rosa, A, Figueiredo, P., and Veritati - Repositório Institucional da Universidade Católica Portuguesa
- Abstract
Question: Migraine is a cyclic and complex disorder, characterized by attacks of headache, sensory and cognitive disturbances1. Thalamocortical connectivity in migraine has been found to be transiently abnormal2. Our aim was to assess if the dynamical properties of the migraine brain are affected during the interictal phase. Methods: Resting-state functional MRI data was collected from 14 menstrual migraine patients without aura (interictal phase) and 12 healthy controls (menstrual post-ovulation phase). fMRI data processing included3: motion and distortion correction, temporal highpass filter, regression of motion and physiological confounds, spatial smoothing, and parcellation with the Desikan atlas. Dynamic functional connectivity (dFC) between regions was computed using phase coherence, and recurrent dFC states were identified by kmeans clustering (k ranging between 3 and 15) of the leading eigenvectors of dFC in each time point4. Permutation tests were performed to evaluate statistically significant differences between patients and controls in the probability of occurrence and the mean lifetime of the dFC states. Results: Similar dFC states were found consistently across different numbers of clusters, k, which resembled the canonical resting-state networks as expected. Compared to healthy controls, migraine patients show a significantly lower mean lifetime in one dFC state, when grouping in 4, 5 and 6 clusters. No differences were found for the probability of occurrence. Conclusions: Migraine may be linked to a disruption of brain networks dynamics. This emphasizes the need to adopt time-resolved methods, in addition to static, to study functional connectivity, to better understand the mechanisms of migraine. Our next step will be to assess the dynamics of the migraine brain throughout the migraine cycle.
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- 2022
21. Epigenetic Dysregulation of 5-hydroxymethylcytosine in Well-Differentiated Pancreatic Neuroendocrine Tumors
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Namrata Setia, Megan Parilla, Lindsay Yassan, Andrea D Olivas, Thomas Krausz, Aarti E Sharma, Xavier M. Keutgen, Sharon S. Zhang, Hanlin Wang, Christopher R. Weber, and John Hart
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Oncology ,medicine.medical_specialty ,Histology ,Proliferation index ,Lymphovascular invasion ,Neuroendocrine tumors ,Epigenesis, Genetic ,Pathology and Forensic Medicine ,chemistry.chemical_compound ,Text mining ,Internal medicine ,Mitotic Index ,medicine ,Humans ,Epigenetics ,5-Hydroxymethylcytosine ,business.industry ,Odds ratio ,medicine.disease ,Pancreatic Neoplasms ,Neuroendocrine Tumors ,Medical Laboratory Technology ,chemistry ,5-Methylcytosine ,Immunohistochemistry ,Female ,business - Abstract
Dysregulation of epigenetic mechanisms, reflected by loss of expression of 5-hydroxymethylcytosine (5-hmC) is being increasingly recognized as a marker of aggressive behavior in several neoplasms; however, the role of such epigenetic modifiers in pancreatic neuroendocrine tumors (PanNETs) has not been studied. Annotated cohort of 60 PanNETs was evaluated for 5-hmC expression using immunohistochemistry. Univariable and multivariable analyses were performed. To determine intratumor heterogeneity of 5-hmC expression, 26 additional synchronous metastatic deposits of PanNETs from 8 patients were evaluated for 5-hmC expression. 5-hmC level showed significant association with the presence of distant metastases (P=0.02), female sex (P=0.04), and Ki-67 proliferation index (P=0.002). A multivariate model created using the stepwise logistic regression analysis showed the presence of nodal metastases (odds ratio=6.15), lymphovascular invasion (odds ratio=4.07) and lack of 5-hmC expression (odds ratio=5.34) were predictive of the risk of distant metastasis in PanNETs with a c-statistic of 0.845. Epigenetic intratumoral heterogeneity of 5-hmC expression was seen in 37.5% cases (3/8). Our work provides evidence that epigenetic regulators are involved in the pathobiology of PanNETs and immunohistochemical analysis of 5-hmC may be able to refine prognostic evaluation of these tumors.
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- 2021
22. 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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- 2023
23. Classification, Prediction, and Concordance of Cognitive and Functional Progression in Patients with Mild Cognitive Impairment in the United States: A Latent Class Analysis
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Mihaela V. Georgieva, Neema Lema, Lesley M. Butler, Raluca Ionescu-Ittu, Urvi Desai, JingJing Zhu, Thomas Kulalert, Keith A. Betts, Xavier M Teitsma, Paul Delmar, and Julie Mouchet
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medicine.medical_specialty ,Clinical Dementia Rating ,Concordance ,03 medical and health sciences ,mild cognitive impairment ,Cognition ,0302 clinical medicine ,Internal medicine ,mental disorders ,latent class analysis ,medicine ,Humans ,Dementia ,Cognitive Dysfunction ,030212 general & internal medicine ,Aged ,Aged, 80 and over ,Models, Statistical ,business.industry ,General Neuroscience ,Age Factors ,General Medicine ,Odds ratio ,Physical Functional Performance ,Mental Status and Dementia Tests ,medicine.disease ,Functional Activities Questionnaire ,United States ,Latent class model ,Confidence interval ,Psychiatry and Mental health ,Clinical Psychology ,Disease Progression ,progression ,Geriatrics and Gerontology ,business ,Alzheimer’s disease ,030217 neurology & neurosurgery ,Research Article - Abstract
Background: Progression trajectories of patients with mild cognitive impairment (MCI) are currently not well understood. Objective: To classify patients with incident MCI into different latent classes of progression and identify predictors of progression class. Methods: Participants with incident MCI were identified from the US National Alzheimer’s Coordinating Center Uniform Data Set (09/2005-02/2019). Clinical Dementia Rating (CDR®) Dementia Staging Instrument-Sum of Boxes (CDR-SB), Functional Activities Questionnaire (FAQ), and Mini-Mental State Examination (MMSE) score longitudinal trajectories from MCI diagnosis were fitted using growth mixture models. Predictors of progression class were identified using multivariate multinomial logistic regression models; odds ratios (ORs) and 95% confidence intervals (CIs) were reported. Results: In total, 21%, 22%, and 57% of participants (N = 830) experienced fast, slow, and no progression on CDR-SB, respectively; for FAQ, these figures were 14%, 23%, and 64%, respectively. CDR-SB and FAQ class membership was concordant for most participants (77%). Older age (≥86 versus≤70 years, OR [95% CI] = 5.26 [1.78–15.54]), one copy of APOE ɛ4 (1.94 [1.08–3.47]), higher baseline CDR-SB (2.46 [1.56–3.88]), lower baseline MMSE (0.85 [0.75–0.97]), and higher baseline FAQ (1.13 [1.02–1.26]) scores were significant predictors of fast progression versus no progression based on CDR-SB (all p
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- 2021
24. Preoperative serum chromogranin-a is predictive of survival in locoregional jejuno-ileal small bowel neuroendocrine tumors
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James D. McDonald, Xavier M. Keutgen, Tahsin M Khan, Praveen D. Chatani, Naris Nilubol, and John G. Aversa
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Adult ,Male ,endocrine system ,medicine.medical_specialty ,Adolescent ,Databases, Factual ,medicine.medical_treatment ,Kaplan-Meier Estimate ,Neuroendocrine tumors ,Gastroenterology ,Article ,Young Adult ,Predictive Value of Tests ,Internal medicine ,Humans ,Medicine ,Jejuno-ileal ,Lymph node ,Aged ,Aged, 80 and over ,Jejunal Neoplasms ,biology ,business.industry ,Cancer ,Chromogranin A ,Middle Aged ,Prognosis ,medicine.disease ,Ileal Neoplasms ,Neuroendocrine Tumors ,Lymphatic system ,medicine.anatomical_structure ,Preoperative Period ,Cohort ,biology.protein ,Lymph Node Excision ,Female ,Surgery ,Lymphadenectomy ,business - Abstract
BACKGROUND: Small bowel neuroendocrine tumors (SB-NET) frequently metastasize to regional lymphatic or distant sites. While most prognostication of SB-NET focuses on lymph node involvement, findings from studies of NETs from other primary sites have suggested that preoperative serum chromogranin-A (CgA) levels may provide a more accurate metric. STUDY DESIGN: Using the National Cancer Database (2004–2016), we analyzed patients with locoregional SB-NET who underwent curative resection including an adequate lymphadenectomy (n = 1,274). A statistically optimized cut-point was used to dichotomize CgA cohort based on preoperative serum CgA levels. RESULTS: We determined that a CgA ≥139ng/mL identified patients with significantly shorter estimated mean overall survival (6.6 years vs. 7.6 years, log-rank p = 0.00001). These patients were also older (63 vs. 57 years, p < 0.001) and more likely to have poorly-differentiated tumors (2.1% vs. 0.7%, p = 0.04) or primary tumors >1cm (88.2% vs. 79.2%, p = 0.001). Clinical features associated with shorter overall survival included preoperative CgA ≥139ng/mL (HR = 2.19, 95% CI 1.22 – 3.92; p = 0.009), age at diagnosis (HR = 1.06, 95% CI 1.03 – 1.09; p < 0.001), Charlson-Deyo score ≥2 (HR = 3.93, 95% CI 1.71 – 9.01; p = 0.001), and poorly-differentiated tumors (HR = 11.22, 95% CI 4.16 – 30.24; p < 0.001). Neither lymph node metastasis nor T-stage were independently associated with shorter overall survival in patients with locoregional SB-NET. CONCLUSIONS: Elevated preoperative serum CgA is an adverse prognostic marker associated with shorter overall survival in patients with locoregional SB-NET.
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- 2021
25. Sunitinib-Loaded Chondroitin Sulfate Hydrogels as a Novel Drug-Delivery Mechanism for the Treatment of Pancreatic Neuroendocrine Tumors
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Olga Lakiza, Namrata Setia, Alyx Vogle, Ralph R. Weichselbaum, Katelyn S Mistretta, Xavier M. Keutgen, Paul R. Miller, Kimberly J. Ornell, Jeannine M. Coburn, and Jelani Williams
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030230 surgery ,Neuroendocrine tumors ,Mice ,03 medical and health sciences ,chemistry.chemical_compound ,Drug Delivery Systems ,0302 clinical medicine ,Cell Line, Tumor ,Sunitinib ,medicine ,Animals ,Chondroitin sulfate ,Cytotoxicity ,integumentary system ,business.industry ,Chondroitin Sulfates ,Hydrogels ,Sunitinib malate ,medicine.disease ,In vitro ,Pancreatic Neoplasms ,Neuroendocrine Tumors ,Oncology ,chemistry ,030220 oncology & carcinogenesis ,Drug delivery ,Self-healing hydrogels ,Cancer research ,Surgery ,business ,medicine.drug - Abstract
Pancreatic neuroendocrine tumors (PanNETs) are increasingly common. Experts debate whether small tumors should be resected. Tumor destruction via injection of cytotoxic agents could offer a minimal invasive approach to this controversy. We hypothesize that a new drug delivery system comprising chondroitin sulfate (CS) hydrogels loaded with sunitinib (SUN) suppresses tumor growth in PanNET cells. Injectable hydrogels composed of CS modified with methacrylate groups (MA) were fabricated and loaded with SUN. Loading target was either 200 µg (SUN200-G) or 500 µg (SUN500-G) as well as sham hydrogel with no drug loading (SUN0-G). SUN release from hydrogels was monitored in vitro over time and cytotoxicity induced by the released SUN was evaluated using QGP-1 and BON1 PanNET cell lines. QGP-1 xenografts were developed in 35 mice and directly injected with 25 µL of either SUN200-G, SUN500-G, SUN0-G, 100 µL of Sunitinib Malate (SUN-inj), or given 40 mg/kg/day oral sunitinib (SUN-oral). SUN-loaded CSMA hydrogel retained complete in vitro cytotoxicity toward the QGP-1 PanNET and BON-1 PanNET cell lines for 21 days. Mouse xenograft models with QGP-1 PanNETs showed a significant delay in tumor growth in the SUN200/500-G, SUN-inj and SUN-oral groups compared with SUN0-G (p = 0.0014). SUN500-G hydrogels induced significantly more tumor necrosis than SUN0-G (p = 0.04). There was no difference in tumor growth delay between SUN200/500G, SUN-inj, and SUN-oral. This study demonstrates that CSMA hydrogels loaded with SUN suppress PanNETs growth. This drug delivery could approach represents a novel way to treat PanNETs and other neoplasms via intratumoral injection.
- Published
- 2021
26. Metastatic well-differentiated pancreatic neuroendocrine tumors to the liver: a narrative review of systemic and surgical management
- Author
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Tanaz Vaghaiwalla, Chih-Yi Liao, Kelvin Memeh, and Xavier M. Keutgen
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Pathology ,medicine.medical_specialty ,Hepatology ,business.industry ,Endocrinology, Diabetes and Metabolism ,RC799-869 ,Diseases of the digestive system. Gastroenterology ,Neuroendocrine tumors ,medicine.disease ,Well differentiated ,Endocrinology ,Medicine ,Narrative review ,business - 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.
- Published
- 2021
27. Systemic and Ocular Adverse Events with Intravitreal Anti-VEGF Therapy Used in the Treatment of Diabetic Retinopathy: a Review
- Author
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Jason A, Zehden, Xavier M, Mortensen, Ashvini, Reddy, and Alice Yang, Zhang
- Subjects
Bevacizumab ,Vascular Endothelial Growth Factor A ,Endophthalmitis ,Diabetic Retinopathy ,Ranibizumab ,Intravitreal Injections ,Diabetes Mellitus ,Humans ,Angiogenesis Inhibitors ,Macular Edema ,Vitreous Hemorrhage - Abstract
Intravitreal anti-vascular endothelial growth factor (VEGF) agents are used routinely in the management of neovascular conditions including proliferative diabetic retinopathy and diabetic macular edema. While the efficacy of anti-VEGF agents has been well-validated, their ocular and systemic adverse events should always be considered and discussed with patients. The aim of this review is to discuss the most recent literature reports regarding the various ocular and systemic adverse events associated with intravitreal anti-VEGF treatment in diabetic retinopathy.The most frequently reported adverse ocular events include subconjunctival hemorrhage, vitreous hemorrhage, increased intraocular pressure, uveitis, endophthalmitis, ocular surface disease, and traumatic cataract. Subconjunctival hemorrhage and vitreous hemorrhage are the most common ocular adverse events reported with intravitreal anti-VEGF treatment. The most serious (though rare) ocular adverse events include endophthalmitis and rhegmatogenous retinal detachment. A consensus regarding the association of systemic adverse events (such as myocardial infarction, stroke, and death) with intravitreal anti-VEGF treatments has not been established. Intravitreal anti-VEGF therapy is used in the treatment of diabetic retinopathy, macular degeneration, and other diseases. These agents are associated with a variety of ocular and systemic adverse events that ophthalmologists should always consider.
- Published
- 2022
28. Deep learning prediction of BRAF-RAS gene expression signature identifies noninvasive follicular thyroid neoplasms with papillary-like nuclear features
- Author
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Alexander T. Pearson, James M. Dolezal, Anna Trzcinska, Xavier M. Keutgen, Nishant Agrawal, Peter Angelos, Sara Kochanny, Elizabeth A. Blair, Chih-Yi Liao, and Nicole A. Cipriani
- Subjects
Proto-Oncogene Proteins B-raf ,0301 basic medicine ,Pathology ,medicine.medical_specialty ,Carcinoma, Papillary, Follicular ,Article ,Pathology and Forensic Medicine ,Thyroid carcinoma ,03 medical and health sciences ,Deep Learning ,0302 clinical medicine ,Text mining ,Follicular phase ,Gene expression ,medicine ,Humans ,Neoplasm ,Thyroid Neoplasms ,Nuclear atypia ,Head and neck cancer ,business.industry ,Gene Expression Profiling ,fungi ,Thyroid ,Diagnostic markers ,medicine.disease ,Gene Expression Regulation, Neoplastic ,Thyroid diseases ,Tumor Subtype ,030104 developmental biology ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,Mutation ,ras Proteins ,Transcriptome ,business - Abstract
Noninvasive follicular thyroid neoplasms with papillary-like nuclear features (NIFTP) are follicular-patterned thyroid neoplasms defined by nuclear atypia and indolent behavior. They harbor RAS mutations, rather than BRAFV600E mutations as is observed in papillary thyroid carcinomas with extensive follicular growth. Reliably identifying NIFTPs aids in safe therapy de-escalation, but has proven to be challenging due to interobserver variability and morphologic heterogeneity. The genomic scoring system BRS (BRAF-RAS score) was developed to quantify the extent to which a tumor’s expression profile resembles a BRAFV600E or RAS-mutant neoplasm. We proposed that deep learning prediction of BRS could differentiate NIFTP from other follicular-patterned neoplasms. A deep learning model was trained on slides from a dataset of 115 thyroid neoplasms to predict tumor subtype (NIFTP, PTC-EFG, or classic PTC), and was used to generate predictions for 497 thyroid neoplasms within The Cancer Genome Atlas (TCGA). Within follicular-patterned neoplasms, tumors with positive BRS (RAS-like) were 8.5 times as likely to carry an NIFTP prediction than tumors with negative BRS (89.7% vs 10.5%, P
- Published
- 2021
29. evALLution: making basic evolution concepts accessible to people with visual impairment through a multisensory tree of life
- Author
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Laurentino, T.G, Xavier, M, Ronco, F, Pina-Martins, F, Domingues, I, Penha, B, Dias, M, de Sousa, A.A, Carrilho, T, Rodrigues, L.R, Pinheiro, C, Rato, D, Balata, D, Ayala-Botto, G, Matos, M, Campelo, M, and Botelho, R
- Subjects
lcsh:LC8-6691 ,lcsh:Special aspects of education ,Evolution ,Touch ,Inclusive outreach ,lcsh:Evolution ,lcsh:QH359-425 ,Multi-sensory ,Visual impairment ,Accessibility ,Blind ,Research Article - Abstract
Background:- \ud \ud People with visual impairment have benefitted from recent developments of assistive technology that aim to decrease socio-economic inequality. However, access to post-secondary education is still extremelly challenging, especially for scientific areas. The under representation of people with visual impairment in the evolution research community is connected with the vision-based communication of evolutionary biology knowledge and the accompanying lack of multisensory alternatives for learning.\ud \ud Results:- \ud \ud Here, we describe the development of an inclusive outreach activity based on a multisensory phylogeny representing 20 taxonomic groups. We provide a tool kit of materials and ideas that allow both the replication of this activity and the adaptation of others, to include people with visual impairment. Furthermore, we provide activity evaluation data, a discussion of the lessons learned and an inclusive description of all figures and visual data presented.\ud \ud The presented baseline data show that people with visual impairment indeed have lack of access to education but are interested in and apt to understand evolutionary biology concepts and predict evolutionary change when education is inclusive.\ud \ud Conclusions:- \ud \ud We show that, with creative investment, basic evolutionary knowledge is perfectly possible to be transmitted through multisensory activities, which everyone can benefit from. Ultimately, we hope this case study will provide a baseline for future initiatives and a more inclusive outreach community.
- Published
- 2021
30. Osteoid osteoma: the great mimicker
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Flavio Duarte Silva, Igor P. Silva, Marcelo Astolfi Caetano Nico, Xavier M. G. R. G. Stump, Isabela Azevedo Nicodemos da Cruz, Bruno Cerretti Carneiro, Julio Brandao Guimaraes, and Alípio Gomes Ormond Filho
- Subjects
Osteoid osteoma ,lcsh:Medical physics. Medical radiology. Nuclear medicine ,medicine.medical_specialty ,Poor prognosis ,lcsh:R895-920 ,X-ray computed ,030218 nuclear medicine & medical imaging ,Lesion ,03 medical and health sciences ,0302 clinical medicine ,Magnetic resonance imaging ,Diagnosis ,medicine ,Radiology, Nuclear Medicine and imaging ,Osteoma ,Tomography ,Neuroradiology ,Educational Review ,Osteoid ,medicine.diagnostic_test ,business.industry ,Bone neoplasms ,Interventional radiology ,medicine.disease ,030220 oncology & carcinogenesis ,Differential ,Radiology ,medicine.symptom ,business - 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
31. Response rates in metastatic neuroendocrine tumors receiving peptide receptor radionuclide therapy and implications for future treatment strategies
- Author
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Chih-Yi Liao, Blase N. Polite, Kelvin Memeh, Edwin L. Kaplan, Brian Ruhle, Tanaz Vaghaiwalla, Xavier M. Keutgen, and Peter Angelos
- Subjects
Male ,Oncology ,medicine.medical_specialty ,medicine.medical_treatment ,030230 surgery ,Neuroendocrine tumors ,Octreotide ,Drug Administration Schedule ,Targeted therapy ,03 medical and health sciences ,0302 clinical medicine ,Coordination Complexes ,Stomach Neoplasms ,Internal medicine ,Intestinal Neoplasms ,Organometallic Compounds ,medicine ,Humans ,Infusions, Intravenous ,Prospective cohort study ,Response Evaluation Criteria in Solid Tumors ,Aged ,Neoplasm Staging ,Retrospective Studies ,medicine.diagnostic_test ,business.industry ,Magnetic resonance imaging ,Middle Aged ,medicine.disease ,Pancreatic Neoplasms ,Neuroendocrine Tumors ,Treatment Outcome ,medicine.anatomical_structure ,Somatostatin ,Positron-Emission Tomography ,030220 oncology & carcinogenesis ,Radionuclide therapy ,Female ,Surgery ,business ,Pancreas - Abstract
Background Peptide receptor radionuclide therapy is a targeted therapy used to treat unresectable somatostatin receptor-positive neuroendocrine tumors. The objective of this study was to evaluate response rates among neuroendocrine tumors of different primaries and identify factors relevant to future treatment strategies. Methods We retrospectively reviewed patients who received peptide receptor radionuclide therapy for neuroendocrine tumors from 2018 to 2019 at our institution. Patients were assessed with computed tomography/magnetic resonance imaging and 68Ga-DOTATATE-positron emission tomography before and after 2 or 4 cycles of peptide receptor radionuclide therapy. Tumor response was evaluated by RECIST 1.1. Statistics included multinomial logistic regression models and Fisher exact test. Results Twenty-seven patients underwent 92 cycles of peptide receptor radionuclide therapy: pancreas (n = 11), small bowel (n = 7), and other (n = 9) neuroendocrine tumors. Overall, 30% (8 of 27) had partial response, 59% (16 of 27) stable disease, and 11% (3 of 27) progressed. Pancreatic neuroendocrine tumors responded differently from small bowel neuroendocrine tumors regardless of cycle number (P = .01). The majority of pancreatic neuroendocrine tumors (6 of 11) had partial response to peptide receptor radionuclide therapy, while all small bowel neuroendocrine tumors had stable disease. Pancreatic neuroendocrine tumors stable after 2 cycles were more likely to respond to additional cycles versus other neuroendocrine tumors (probability: 60% vs 11%). Conclusion Patients with unresectable advanced or metastatic pancreatic neuroendocrine tumors may benefit from a full course of peptide receptor radionuclide therapy, whereas other neuroendocrine tumors appear less likely to respond. Large prospective studies are needed to confirm these findings.
- Published
- 2021
32. Indoleamine 2,3-Dioxygenase-1 Expression in Adrenocortical Carcinoma
- Author
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Alyx Vogle, Paolo Gattuso, Brendan M. Finnerty, Rasa Zarnegar, Ritu Ghai, John F. Tierney, Xavier M. Keutgen, and Thomas J. Fahey
- Subjects
Male ,Stromal cell ,Programmed Cell Death 1 Receptor ,Cell ,CD8-Positive T-Lymphocytes ,03 medical and health sciences ,Lymphocytes, Tumor-Infiltrating ,0302 clinical medicine ,Stroma ,Antineoplastic Combined Chemotherapy Protocols ,Adrenocortical Carcinoma ,Biomarkers, Tumor ,medicine ,Humans ,Indoleamine-Pyrrole 2,3,-Dioxygenase ,Adrenocortical carcinoma ,Adrenal adenoma ,Indoleamine 2,3-dioxygenase ,Immune Checkpoint Inhibitors ,Retrospective Studies ,business.industry ,Programmed Cell Death 1 Ligand 2 Protein ,medicine.disease ,Adrenal Cortex Neoplasms ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,Adrenal Cortex ,Cancer research ,Immunohistochemistry ,Female ,030211 gastroenterology & hepatology ,Surgery ,business ,CD8 - Abstract
Background Indoleamine 2,3-dioxygenase 1 (IDO-1) is overexpressed in many human carcinomas and a successful target for therapy in mouse models. Prognosis of patients with advanced adrenocortical carcinoma (ACC) is poor due to the lack of effective treatments, and new therapies are therefore needed. Herein, we investigate whether IDO-1 is expressed in human ACC tissues. Methods 53 tissue samples from patients with ACC, adrenal adenoma (AA), adrenocortical tumors (ACTs), and normal adrenal were identified. Immunohistochemistry was performed on formalin-fixed, paraffin-embedded slides for IDO-1. Samples were scored for cytoplasmic staining as per intensity and the percent of positive cells and for stromal staining by percent of positive cells. Tumor characteristics, PD-L1, PDL-2, and CD-8+ T-lymphocyte expression were also determined. Results Samples from 32 ACC, 3 ACT, 15 AA, and 3 normal adrenal were analyzed. IDO-1 was expressed in tumor tissue in 22 of 32 ACC samples, compared with 8 of 15 AA sample (P = 0.344). IDO-1 expression was significantly increased in stromal tissue of ACC samples (16 of 33), compared with AA samples (0 of 15) (P = 0.001). IDO-1 expression in ACC and AA samples was associated with PD-L2 expression (P = 0.034). IDO-1 expression in ACC stromal tissue was associated with CD8+ T-lymphocyte infiltration (P = 0.028). Conclusions IDO-1 is expressed in a majority of ACC samples. Its expression in tumor tissue is associated with PD-L2 expression, and expression in stroma is associated with CD8+ cell infiltration. IDO-1 inhibition, alone or in combination with PD-1 inhibition, could therefore be an interesting target in treatment of ACC.
- Published
- 2020
33. Epigenome erosion and SOX10 drive neural crest phenotypic mimicry in triple-negative breast cancer
- Author
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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
- Subjects
Nottingham Breast Cancer Research Centre ,Oncology ,Pharmacology (medical) ,Radiology, Nuclear Medicine and imaging - 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.
- Published
- 2022
34. A machine-learning algorithm for distinguishing malignant from benign indeterminate thyroid nodules using ultrasound radiomic features
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Xavier M. Keutgen, Hui Li, Kelvin Memeh, Julian Conn Busch, Jelani Williams, Li Lan, David Sarne, Brendan Finnerty, Peter Angelos, Thomas J. Fahey, and Maryellen L. Giger
- Subjects
Radiology, Nuclear Medicine and imaging ,Computer-Aided Diagnosis - Abstract
BACKGROUND: Ultrasound (US)-guided fine needle aspiration (FNA) cytology is the gold standard for the evaluation of thyroid nodules. However, up to 30% of FNA results are indeterminate, requiring further testing. In this study, we present a machine-learning analysis of indeterminate thyroid nodules on ultrasound with the aim to improve cancer diagnosis. METHODS: Ultrasound images were collected from two institutions and labeled according to their FNA (F) and surgical pathology (S) diagnoses [malignant (M), benign (B), and indeterminate (I)]. Subgroup breakdown (FS) included: 90 BB, 83 IB, 70 MM, and 59 IM thyroid nodules. Margins of thyroid nodules were manually annotated, and computerized radiomic texture analysis was conducted within tumor contours. Initial investigation was conducted using five-fold cross-validation paradigm with a two-class Bayesian artificial neural networks classifier, including stepwise feature selection. Testing was conducted on an independent set and compared with a commercial molecular testing platform. Performance was evaluated using receiver operating characteristic analysis in the task of distinguishing between malignant and benign nodules. RESULTS: About 1052 ultrasound images from 302 thyroid nodules were used for radiomic feature extraction and analysis. On the training/validation set comprising 263 nodules, five-fold cross-validation yielded area under curves (AUCs) of 0.75 [Standard Error (SE) = 0.04; [Formula: see text]] and 0.67 (SE = 0.05; [Formula: see text]) for the classification tasks of MM versus BB, and IM versus IB, respectively. On an independent test set of 19 IM/IB cases, the algorithm for distinguishing indeterminate nodules yielded an AUC value of 0.88 (SE = 0.09; [Formula: see text]), which was higher than the AUC of a commercially available molecular testing platform (AUC = 0.81, SE = 0.11; [Formula: see text]). CONCLUSION: Machine learning of computer-extracted texture features on gray-scale ultrasound images showed promising results classifying indeterminate thyroid nodules according to their surgical pathology.
- Published
- 2022
35. Upper airways dysmorphology and obstructive sleeping apnea in Down syndrome
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Neus Martínez Abadías, Luis Miguel Echeverry, Laura Maréchal, Sandra M. Giménez, Xavier M. Sevillano, Juan M. Fortea, and Yann Heuzé
- Subjects
Genetics ,Molecular Biology ,Biochemistry ,Biotechnology - Published
- 2022
36. Risk factors associated with positive resection margins in patients with adrenocortical carcinoma
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Sitaram V. Chivukula, Jennifer Poirier, John F. Tierney, Nasim T. Babazadeh, Nicholas J. Skertich, Xavier M. Keutgen, and Martin Hertl
- Subjects
Adult ,Male ,Oncology ,medicine.medical_specialty ,medicine.medical_treatment ,Resection ,03 medical and health sciences ,0302 clinical medicine ,Risk Factors ,Internal medicine ,Adrenocortical Carcinoma ,Positive Margins ,medicine ,Humans ,Adrenocortical carcinoma ,In patient ,Aged ,Retrospective Studies ,Adjuvant radiotherapy ,business.industry ,Margins of Excision ,General Medicine ,Middle Aged ,medicine.disease ,Adrenal Cortex Neoplasms ,United States ,Survival Rate ,Lymphatic Metastasis ,030220 oncology & carcinogenesis ,Female ,030211 gastroenterology & hepatology ,Surgery ,business ,Adjuvant ,psychological phenomena and processes ,Follow-Up Studies - Abstract
Positive resection margins are associated with worse survival after surgery for adrenocortical carcinoma (ACC). We aimed to identify risk factors for positive margins post-resection.The NCDB was queried for ACC patients from 2006 to 2015. Patients with positive versus negative resection margins post-surgery were compared using Chi-square tests. Survival based on adjuvant treatment was assessed using Kaplan-Meier curves.1,973 patients with ACC were identified, 217 (11.0%) with positive margins. Multivariable analysis identified extra-adrenal extension (HR 4.92, p 0.001), lymph node metastases (HR 2.64, p = 0.001), and distant metastases (HR 1.53, p = 0.03) as risk factors for positive margins. No significant difference in margin status existed between patients who had an open versus minimally invasive procedure (p = 0.6). Positive margin patients receiving adjuvant radiation (p = 0.007) or combined chemo-radiation (p = 0.001) had the longest survival.No modifiable risk factors were identified, but patients with positive margins receiving adjuvant radiation or chemo-radiation had the longest survival.
- Published
- 2020
37. Experimental Variables that Affect Human Hepatocyte AAV Transduction in Liver Chimeric Mice
- Author
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Mohammad Kabbani, Philip Meuleman, Eleftherios Michailidis, Ype P. de Jong, Corrine Quirk, Chenhui Zou, Luis Chiriboga, Katherine A. High, Mustafa N. Yazicioglu, Koen Vercauteren, Roland W. Herzog, Xavier M. Anguela, and Irene Zoluthkin
- Subjects
0301 basic medicine ,lcsh:QH426-470 ,Genetic enhancement ,Transgene ,Biology ,liver ,GENE-TRANSFER ,Virus ,Article ,Green fluorescent protein ,03 medical and health sciences ,Transduction (genetics) ,Chimera (genetics) ,0302 clinical medicine ,hemophilia ,Medicine and Health Sciences ,Genetics ,medicine ,lcsh:QH573-671 ,Molecular Biology ,Gene ,IN-VIVO ,lcsh:Cytology ,human hepatocytes ,donor variability ,AAV ,EXPANSION ,HEPATIC-DYSFUNCTION ,gene therapy ,Cell biology ,lcsh:Genetics ,ENGRAFTMENT ,030104 developmental biology ,medicine.anatomical_structure ,humanized mice ,ADENOASSOCIATED VIRUS ,MURINE LIVER ,030220 oncology & carcinogenesis ,Hepatocyte ,REPLICATION ,VECTORS ,Molecular Medicine ,C VIRUS-INFECTION - 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., Graphical Abstract, Liver chimeric mice are widely used to model human hepatocyte susceptibility to adeno-associated virus (AAV) gene vector transduction with inconsistent finding between laboratories. Zou et al. quantify to what extent three experimental conditions—namely, mouse liver injury, human donor variability, and AAV doses—affect human hepatocyte transduction in chimeric mice.
- Published
- 2020
38. Strain pattern of each ligamentous band of the superficial deltoid ligament: a cadaver study
- Author
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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
- Subjects
Tibionavicular ligament ,lcsh:Diseases of the musculoskeletal system ,Rotation ,Strain (injury) ,03 medical and health sciences ,0302 clinical medicine ,Rheumatology ,Cadaver ,Deltoid ligament ,Subtalar joint ,medicine ,Humans ,Orthopedics and Sports Medicine ,Range of Motion, Articular ,030203 arthritis & rheumatology ,Orthodontics ,030222 orthopedics ,business.industry ,Foot ,Tibiocalcaneal ligament ,Biomechanics ,medicine.disease ,musculoskeletal system ,Biomechanical Phenomena ,body regions ,medicine.anatomical_structure ,Ligaments, Articular ,Ligament ,Tibiospring ligament ,Ankle ,lcsh:RC925-935 ,business ,Cadaveric spasm ,Superficial posterior tibiotalar ligament ,human activities ,Ankle Joint ,Research Article - Abstract
BackgroundThere 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.MethodsThe 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.ResultsThe 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.ConclusionOur 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.
- Published
- 2020
39. The Chicago Consensus on peritoneal surface malignancies: Management of desmoplastic small round cell tumor, breast, and gastrointestinal stromal tumors
- Author
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Ryan P. Merkow, Shu-Yuan Xiao, Francisco J. Izquierdo, Erin W. Gilbert, Michael D. Kluger, Martin D. Goodman, Kaitlyn J. Kelly, Melvy Sarah Mathew, Alejandro Plana, Laura A. Lambert, Brian D. Badgwell, Joshua M. V. Mammen, Daniel E. Abbott, Anand Govindarajan, Aliya N. Husain, Aytekin Oto, H. Richard Alexander, Jason M. Foster, Namrata Setia, Andrew M. Lowy, Travis E. Grotz, Blase N. Polite, Nita Ahuja, Fabian M. Johnston, Colette R. Pameijer, Hedy L. Kindler, Daniel V.T. Catenacci, Robert M. Barone, Konstantinos I. Votanopoulos, T. Clark Gamblin, Joel M. Baumgartner, James C. Cusack, George I. Salti, Callisia N. Clarke, Carla Harmath, Maheswari Senthil, Clifford S. Cho, Mazin Al‐Kasspooles, Joshua H. Winer, Oliver S. Eng, Grace Z. Mak, Giorgos C. Karakousis, Charles Komen Brown, Lucas Sideris, David L. Bartlett, Carlos H. F. Chan, Abraham H. Dachman, Andrea Hayes-Jordan, Kamran Idrees, Kiran K. Turaga, Xavier M. Keutgen, Rhonda K. Yantiss, Vadim Gushchin, Darryl Schuitevoerder, Sean P. Dineen, M. Haroon A. Choudry, James Fleshman, Dan G. Blazer, David Jiang, Daniel M. Labow, Byrne Lee, Scott K. Sherman, Sam G. Pappas, Patricio M. Polanco, Michael G. White, Alexandra Gangi, Sanjay S. Reddy, Marcovalerio Melis, Paul H. Sugarbaker, Ugwuji N. Maduekwe, Nelya Melnitchouk, Farin Amersi, Timothy J. Kennedy, Jeremiah L. Deneve, Lloyd A. Mack, Jesus Esquivel, Sherif Abdel-Misih, Harveshp Mogal, Armando Sardi, Leopoldo J. Fernandez, Sandy Tun, Wilbur B. Bowne, Charles A. Staley, Lana Bijelic, Richard E. Royal, Chukwuemeka Ihemelandu, Joseph Skitzki, Nader Hanna, John M. Kane, Richard N. Berri, Amanda K. Arrington, Georgios V. Georgakis, Jula Veerapong, Mecker G. Möller, and Edward A. Levine
- Subjects
Chicago ,Cancer Research ,Pathology ,medicine.medical_specialty ,Consensus ,Stromal cell ,Peritoneal surface ,Desmoplastic small-round-cell tumor ,Gastrointestinal Stromal Tumors ,business.industry ,Breast Neoplasms ,Desmoplastic Small Round Cell Tumor ,medicine.disease ,Oncology ,Physicians ,Practice Guidelines as Topic ,Humans ,Medicine ,Interdisciplinary Communication ,Female ,business ,Peritoneal Neoplasms ,Gastrointestinal Neoplasms - Abstract
The Chicago Consensus Working Group provides multidisciplinary recommendations for the management of desmoplastic small round cell tumor, breast, and gastrointestinal stromal tumor specifically related to peritoneal surface malignancy. These guidelines are developed with input from leading experts including surgical oncologists, medical oncologists, pathologists, radiologists, palliative care physicians, and pharmacists. These guidelines recognize and address the emerging need for increased awareness in the appropriate management of peritoneal surface disease. They are not intended to replace the quest for higher levels of evidence.
- Published
- 2020
40. The Chicago Consensus on peritoneal surface malignancies: Palliative care considerations
- Author
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Georgios V. Georgakis, Carlos H. F. Chan, George I. Salti, Jula Veerapong, Michael D. Kluger, Timothy J. Kennedy, Maheswari Senthil, Lana Bijelic, Edward A. Levine, Monica Malec, Charles A. Staley, Sanjay S. Reddy, Anand Govindarajan, Nita K. Lee, Sean P. Dineen, Oliver S. Eng, Leopoldo J. Fernandez, Richard E. Royal, Lucas Sideris, Haejin In, Garrett M. Nash, Andrew M. Lowy, Colette R. Pameijer, Joshua H. Winer, H. Richard Alexander, Chih-Yi Liao, Shu-Yuan Xiao, Alejandro Plana, Carol Semrad, Martin D. Goodman, Kaitlyn J. Kelly, Erin W. Gilbert, David Jiang, Daniel M. Labow, Blase N. Polite, Clifford S. Cho, Aytekin Oto, Andrea Hayes-Jordan, Steven A. Ahrendt, Scott K. Sherman, Patricio M. Polanco, Nita Ahuja, Giorgos C. Karakousis, Brian D. Badgwell, Hedy L. Kindler, Lloyd A. Mack, Dan G. Blazer, Namrata Setia, Jesus Esquivel, Rhonda K. Yantiss, Daniel V.T. Catenacci, Abraham H. Dachman, Sam G. Pappas, Melvy Mathew, Grace Z. Mak, James C. Cusack, Wilbur B. Bowne, Xavier M. Keutgen, Callisia N. Clarke, James Fleshman, Nader Hanna, John M. Kane, Aliya N. Husain, Mecker G. Möller, Konstantinos I. Votanopoulos, Ugwuji N. Maduekwe, Robert M. Barone, Richard N. Berri, Amanda K. Arrington, Sherif Abdel-Misih, Harveshp Mogal, M. Haroon A. Choudry, Laura A. Lambert, Fabian M. Johnston, Byrne Lee, Alexandra Gangi, Nelya Melnitchouk, Farin Amersi, Jeremiah L. Deneve, Chukwuemeka Ihemelandu, Joseph Skitzki, Kiran K. Turaga, Carla Harmath, Dejan Micic, Armando Sardi, Travis E. Grotz, Joshua M. V. Mammen, Daniel E. Abbott, Jason M. Foster, Ryan P. Merkow, David L. Bartlett, T. Clark Gamblin, Francisco J. Izquierdo, Michael G. White, Charles Komen Brown, Marcovalerio Melis, Paul H. Sugarbaker, Joel M. Baumgartner, Mazin Al‐Kasspooles, Darryl Schuitevoerder, Kamran Idrees, and Vadim Gushchin
- Subjects
Chicago ,Cancer Research ,medicine.medical_specialty ,Consensus ,Palliative care ,Peritoneal surface ,Nutritional Support ,business.industry ,Palliative Care ,Ascites ,Oncology ,Physicians ,Practice Guidelines as Topic ,Humans ,Medicine ,Interdisciplinary Communication ,business ,Intensive care medicine ,Intestinal Obstruction ,Peritoneal Neoplasms - Abstract
The Chicago Consensus Working Group provides multidisciplinary recommendations for palliative care specifically related to peritoneal surface malignancies. These guidelines are developed with input from leading experts including surgical oncologists, medical oncologists, gynecologic oncologists, pathologists, radiologists, palliative care physicians, and pharmacists. These guidelines recognize and address the emerging need for increased awareness in the appropriate management of peritoneal surface disease. They are not intended to replace the quest for higher levels of evidence.
- Published
- 2020
41. The Chicago Consensus on peritoneal surface malignancies: Management of neuroendocrine tumors
- Author
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Kamran Idrees, Vadim Gushchin, Joshua H. Winer, Erin W. Gilbert, Carlos H. F. Chan, Georgios V. Georgakis, Nita Ahuja, Joshua M. V. Mammen, Steven A. Ahrendt, Clifford S. Cho, Anand Govindarajan, Daniel V.T. Catenacci, Grace Z. Mak, Brian D. Badgwell, Lloyd A. Mack, Daniel E. Abbott, Konstantinos I. Votanopoulos, Jesus Esquivel, Aytekin Oto, Namrata Setia, Ugwuji N. Maduekwe, Sean P. Dineen, Jula Veerapong, Leopoldo J. Fernandez, Chukwuemeka Ihemelandu, Joseph Skitzki, Martin D. Goodman, Xavier M. Keutgen, Andrea Hayes-Jordan, Fabian M. Johnston, Rhonda K. Yantiss, Wilbur B. Bowne, James Fleshman, Aliya N. Husain, Kaitlyn J. Kelly, Michael D. Kluger, Blase N. Polite, Hedy L. Kindler, Travis E. Grotz, Sanjay S. Reddy, Nader Hanna, Ryan P. Merkow, Lucas Sideris, Laura A. Lambert, John M. Kane, George I. Salti, Scott K. Sherman, T. Clark Gamblin, Patricio M. Polanco, Melvy Sarah Mathew, Haejin In, M. Haroon A. Choudry, Chih-Yi Liao, Shu-Yuan Xiao, Jason M. Foster, Callisia N. Clarke, Francisco J. Izquierdo, Darryl Schuitevoerder, David L. Bartlett, Lana Bijelic, Alejandro Plana, James C. Cusack, Andrew M. Lowy, Timothy J. Kennedy, Richard E. Royal, Michael G. White, Abraham H. Dachman, Joel M. Baumgartner, Marcovalerio Melis, Lindsay Alpert, Mazin Al‐Kasspooles, Dan G. Blazer, Kiran K. Turaga, Colette R. Pameijer, Paul H. Sugarbaker, Carla Harmath, Mecker G. Möller, Sam G. Pappas, Robert M. Barone, Richard N. Berri, Amanda K. Arrington, Alexandra Gangi, Edward A. Levine, Charles Komen Brown, David Jiang, Daniel M. Labow, Nelya Melnitchouk, Byrne Lee, Giorgos C. Karakousis, Sandy Tun, Charles A. Staley, Sherif Abdel-Misih, Harveshp Mogal, Jeremiah L. Deneve, Armando Sardi, Maheswari Senthil, Oliver S. Eng, H. Richard Alexander, and Farin Amersi
- Subjects
Chicago ,Cancer Research ,Pathology ,medicine.medical_specialty ,Consensus ,Peritoneal surface ,business.industry ,Neuroendocrine tumors ,medicine.disease ,Neuroendocrine Tumors ,Oncology ,Physicians ,Practice Guidelines as Topic ,medicine ,Humans ,Interdisciplinary Communication ,business ,Peritoneal Neoplasms - Abstract
The Chicago Consensus Working Group provides multidisciplinary recommendations for the management of neuroendocrine tumors specifically related to the management of peritoneal surface malignancy. These guidelines are developed with input from leading experts, including surgical oncologists, medical oncologists, pathologists, radiologists, palliative care physicians, and pharmacists. These guidelines recognize and address the emerging need for increased awareness in the appropriate management of peritoneal surface disease. They are not intended to replace the quest for higher levels of evidence.
- Published
- 2020
42. Surgical Management of Pancreatic Neuroendocrine Tumors
- Author
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Tanaz Vaghaiwalla and Xavier M. Keutgen
- Subjects
Surgical resection ,medicine.medical_specialty ,Pancreatic neuroendocrine tumor ,medicine.medical_treatment ,Neuroendocrine tumors ,Pancreaticoduodenectomy ,03 medical and health sciences ,Pancreatectomy ,0302 clinical medicine ,medicine ,Animals ,Humans ,Anatomic resection ,business.industry ,medicine.disease ,Pancreatic Neoplasms ,Neuroendocrine Tumors ,medicine.anatomical_structure ,Multiple factors ,Oncology ,030220 oncology & carcinogenesis ,030211 gastroenterology & hepatology ,Surgery ,Radiology ,Distal pancreatectomy ,Pancreas ,business - Abstract
Surgical management of pancreatic neuroendocrine tumors (PNETS) is steadily evolving and is influenced by multiple factors. Sporadic PNETs are generally managed more aggressively than those occurring in the background of hereditary syndromes, and functioning PNETs are almost always resected if they are not metastatic. Localized nonfunctioning PNETs less than 2 cm can often be observed. Surgical resection for localized PNET greater than 2 cm comprises parenchymal sparing pancreas resections, such as enucleations, or formal anatomic resection, such as distal pancreatectomy or pancreaticoduodenectomy. PNETs commonly metastasize to the liver, and several systemic and liver-directed options to treat hepatic metastases are available.
- Published
- 2020
43. Effect on efficacy and safety trial outcomes of also enrolling patients on ongoing glucocorticoid therapy in rheumatoid arthritis clinical trials of tocilizumab or adalimumab or methotrexate monotherapy
- Author
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Yves Luder, Mary Safy-Khan, Xavier M Teitsma, Johannes W. J. Bijlsma, Maria J.H. de Hair, Attila Pethoe-Schramm, Johannes W G Jacobs, Paco M J Welsing, Michael D Edwardes, Jacob M van Laar, and Jenny Devenport
- Subjects
medicine.medical_specialty ,Immunology ,Antibodies, Monoclonal, Humanized ,Infections ,General Biochemistry, Genetics and Molecular Biology ,Arthritis, Rheumatoid ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Tocilizumab ,Rheumatology ,Internal medicine ,medicine ,Adalimumab ,Humans ,Immunology and Allergy ,030212 general & internal medicine ,Adverse effect ,Glucocorticoids ,Randomized Controlled Trials as Topic ,030203 arthritis & rheumatology ,business.industry ,medicine.disease ,Clinical trial ,Methotrexate ,Treatment Outcome ,chemistry ,Glucocorticoid therapy ,Antirheumatic Agents ,Rheumatoid arthritis ,Drug Therapy, Combination ,Outcomes research ,business ,medicine.drug - Abstract
BackgroundIn rheumatoid arthritis (RA) trials, inclusion of patients on background treatment with glucocorticoids (GCs) might impact efficacy and safety outcomes.ObjectivesTo determine if inclusion of patients on background GC use influenced efficacy and safety outcomes of RA randomised clinical trials on initiation of tocilizumab (TCZ) or adalimumab (ADA) or methotrexate (MTX) monotherapy.MethodsData of four double-blind RA randomised controlled trials (AMBITION, ACT-RAY, ADACTA and FUNCTION) with in total four TCZ, one ADA and two MTX monotherapy arms were analysed. Analyses of covariance of changes from baseline to week 24 in efficacy endpoints and radiographic progression up to week 104 were performed, correcting for relevant covariates. Incidence rates of serious adverse events (SAEs) were assessed.ResultsNo statistically significant differences were found in efficacy parameters between background GC users and non-GC users, except for less radiographic progression associated with GC usage in one MTX arm. SAE rates were not statistically significantly different between GC users and non-GC users in the treatment arms.ConclusionNo effect of including patients on background GC treatment on efficacy and safety trial outcomes was found, with the exception of reduced radiological joint damage in one MTX arm.
- Published
- 2020
44. Operative resection in early stage pancreatic neuroendocrine tumors in the United States: Are we over- or undertreating patients?
- Author
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Sitaram V. Chivukula, Martin Hertl, John F. Tierney, Xavier M. Keutgen, and Jennifer Poirier
- Subjects
Male ,medicine.medical_specialty ,Clinical Decision-Making ,Tail of pancreas ,Kaplan-Meier Estimate ,030230 surgery ,Neuroendocrine tumors ,03 medical and health sciences ,Pancreatectomy ,0302 clinical medicine ,Humans ,Medicine ,Practice Patterns, Physicians' ,Stage (cooking) ,Pancreas ,Survival rate ,Aged ,Neoplasm Staging ,Proportional Hazards Models ,Retrospective Studies ,business.industry ,Proportional hazards model ,Patient Selection ,Hazard ratio ,Cancer ,Retrospective cohort study ,Middle Aged ,medicine.disease ,United States ,Tumor Burden ,Pancreatic Neoplasms ,Survival Rate ,Neuroendocrine Tumors ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,Practice Guidelines as Topic ,Female ,Surgery ,Radiology ,business - Abstract
Many current guidelines recommend nonoperative management for pancreatic neuroendocrine tumors2 cm. The objective of this study was to evaluate the utilization and outcomes of resection for these pancreatic neuroendocrine tumors in the United States.Using the National Cancer Database (2004-2014), 3,243 cases of T1 (≤2.0 cm) pancreatic neuroendocrine tumors were identified. Additional patient and tumor characteristics were examined. Multivariate models were used to identify factors that predicted resection and to assess patient survival after resection.75% of pancreatic neuroendocrine tumors measuring 0 to 1.0 cm and 80% of pancreatic neuroendocrine tumors measuring1.0 and ≤2.0 cm were resected. Eighty-four pancreatic neuroendocrine tumors were functional, of which 82% were resected. Variables influencing resection included positive lymph nodes, tumor in body or tail of pancreas, well or moderately differentiated tumors, and resection at academic medical centers (odds ratio 1.5-4.9). When controlling for other variables, patients with pancreatic neuroendocrine tumors 1 to 2 cm who underwent resection had a prolonged 5-year survival rate (hazard ratio 0.51, confidence interval 0.34-0.75) when compared with those who did not undergo resection. This survival benefit of resection was not found for pancreatic neuroendocrine tumors 0 to 1 cm (hazard ratio = 0.63, confidence interval 0.36-1.11).Contrary to many current recommendations, most patients with pancreatic neuroendocrine tumors ≤2.0 cm undergo surgical resection in the United States. A survival benefit was found for resection of pancreatic neuroendocrine tumors 1 to 2 cm, suggesting that current recommendations should perhaps be revised.
- Published
- 2020
45. The North American Neuroendocrine Tumor Society Consensus Paper on the Surgical Management of Pancreatic Neuroendocrine Tumors
- Author
-
Jennifer A. Chan, Xavier M. Keutgen, James R. Howe, Yusuf Menda, Jennifer F. Tseng, Rebecca M. Minter, Claudius Conrad, Thomas A. Hope, Michelle K. Kim, Herbert J. Zeh, Jeffrey A. Drebin, Gagandeep Singh, Steven K. Libutti, Rodney F. Pommier, Thorvardur R. Halfdanarson, Jeffrey E. Lee, Nipun B. Merchant, Terry C. Lairmore, and Julie Hallet
- Subjects
medicine.medical_specialty ,Pancreatic neuroendocrine tumor ,Consensus Development Conferences as Topic ,Endocrinology, Diabetes and Metabolism ,medicine.medical_treatment ,Clinical Sciences ,MEDLINE ,Review Literature as Topic ,Neuroendocrine tumors ,pancreatic neuroendocrine tumor ,neuroendocrine tumor liver metastases ,Article ,Pancreatic Cancer ,03 medical and health sciences ,Rare Diseases ,0302 clinical medicine ,Endocrinology ,Medical ,Internal Medicine ,medicine ,neuroendocrine ,Humans ,pancreas ,metastases ,Societies, Medical ,Cancer ,Surgeons ,Gastroenterology & Hepatology ,Hepatology ,business.industry ,General surgery ,Neurosciences ,Consensus conference ,medicine.disease ,Pancreatic Neoplasms ,Neuroendocrine Tumors ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,North America ,Practice Guidelines as Topic ,Pancreatectomy ,030211 gastroenterology & hepatology ,pancreatectomy ,Societies ,Digestive Diseases ,Pancreas ,business - 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.
- Published
- 2020
46. First Differentiate and Then Operate (Or Not) : Editorial on 'Surgical Treatment of Patients with Poorly Differentiated Pancreatic Neuroendocrine Carcinoma: An NCDB Analysis'
- Author
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Xavier M, Keutgen
- Subjects
Pancreatic Neoplasms ,Neuroendocrine Tumors ,Humans ,Carcinoma, Neuroendocrine - Published
- 2022
47. Addressing the clinical unmet needs in primary Sjögren's Syndrome through the sharing, harmonization and federated analysis of 21 European cohorts
- Author
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Pezoulas, V.C. Goules, A. Kalatzis, F. Chatzis, L. Kourou, K.D. Venetsanopoulou, A. Exarchos, T.P. Gandolfo, S. Votis, K. Zampeli, E. Burmeister, J. May, T. Marcelino Pérez, M. Lishchuk, I. Chondrogiannis, T. Andronikou, V. Varvarigou, T. Filipovic, N. Tsiknakis, M. Baldini, C. Bombardieri, M. Bootsma, H. Bowman, S.J. Shahnawaz Soyfoo, M. Parisis, D. Delporte, C. Devauchelle-Pensec, V. Pers, J.-O. Dörner, T. Bartoloni, E. Gerli, R. Giacomelli, R. Jonsson, R. Ng, W.-F. Priori, R. Ramos-Casals, M. Sivils, K. Skopouli, F. Torsten, W. A. G. van Roon, J. Xavier, M. De Vita, S. Tzioufas, A.G. Fotiadis, D.I.
- Abstract
For many decades, the clinical unmet needs of primary Sjögren's Syndrome (pSS) have been left unresolved due to the rareness of the disease and the complexity of the underlying pathogenic mechanisms, including the pSS-associated lymphomagenesis process. Here, we present the HarmonicSS cloud-computing exemplar which offers beyond the state-of-the-art data analytics services to address the pSS clinical unmet needs, including the development of lymphoma classification models and the identification of biomarkers for lymphomagenesis. The users of the platform have been able to successfully interlink, curate, and harmonize 21 regional, national, and international European cohorts of 7,551 pSS patients with respect to the ethical and legal issues for data sharing. Federated AI algorithms were trained across the harmonized databases, with reduced execution time complexity, yielding robust lymphoma classification models with 85% accuracy, 81.25% sensitivity, 85.4% specificity along with 5 biomarkers for lymphoma development. To our knowledge, this is the first GDPR compliant platform that provides federated AI services to address the pSS clinical unmet needs. © 2022 The Author(s)
- Published
- 2022
48. Multiyear Factor VIII Expression after AAV Gene Transfer for Hemophilia A
- Author
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Xavier M Anguela, Kristen Jaworski, Stacy E Croteau, John E J Rasko, Tiffany Chang, Federico Mingozzi, Paul E Monahan, Katherine A. High, Kathleen Z Reape, Margaret V Ragni, Lindsey A. George, Amy Macdougall, Spencer K. Sullivan, M Elaine Eyster, Benjamin J. Samelson-Jones, Robert Noble, Michael Recht, Marla Curran, and Klaudia Kuranda
- Subjects
Adult ,Male ,medicine.medical_specialty ,Adolescent ,Genotype ,Genetic enhancement ,Genetic Vectors ,Hemophilia A ,Gastroenterology ,Article ,Young Adult ,Immune system ,Internal medicine ,medicine ,Humans ,Vector (molecular biology) ,Adverse effect ,Glucocorticoids ,Immunosuppression Therapy ,Lung ,Factor VIII ,business.industry ,General Medicine ,Genetic Therapy ,Dependovirus ,Middle Aged ,Confidence interval ,Discontinuation ,medicine.anatomical_structure ,Cohort ,Hepatocytes ,business ,Follow-Up Studies - Abstract
Background The goal of gene therapy for patients with hemophilia A is to safely impart long-term stable factor VIII expression that predictably ameliorates bleeding with the use of the lowest possible vector dose. Methods In this phase 1-2 trial, we infused an investigational adeno-associated viral (AAV) vector (SPK-8011) for hepatocyte expression of factor VIII in 18 men with hemophilia A. Four dose cohorts were enrolled; the lowest-dose cohort received a dose of 5 × 1011 vector genomes (vg) per kilogram of body weight, and the highest-dose cohort received 2 × 1012 vg per kilogram. Some participants received glucocorticoids within 52 weeks after vector administration either to prevent or to treat a presumed AAV capsid immune response. Trial objectives included evaluation of the safety and preliminary efficacy of SPK-8011 and of the expression and durability of factor VIII. Results The median safety observation period was 36.6 months (range, 5.5 to 50.3). A total of 33 treatment-related adverse events occurred in 8 participants; 17 events were vector-related, including 1 serious adverse event, and 16 were glucocorticoid-related. Two participants lost all factor VIII expression because of an anti-AAV capsid cellular immune response that was not sensitive to immune suppression. In the remaining 16 participants, factor VIII expression was maintained; 12 of these participants were followed for more than 2 years, and a one-stage factor VIII assay showed no apparent decrease in factor VIII activity over time (mean [±SD] factor VIII activity, 12.9±6.9% of the normal value at 26 to 52 weeks when the participants were not receiving glucocorticoids vs. 12.0±7.1% of the normal value at >52 weeks after vector administration; 95% confidence interval [CI], -2.4 to 0.6 for the difference between matched pairs). The participants had a 91.5% reduction (95% CI, 88.8 to 94.1) in the annualized bleeding rate (median rate, 8.5 events per year [range, 0 to 43.0] before vector administration vs. 0.3 events per year [range, 0 to 6.5] after vector administration). Conclusions Sustained factor VIII expression in 16 of 18 participants who received SPK-8011 permitted discontinuation of prophylaxis and a reduction in bleeding episodes. No major safety concerns were reported. (Funded by Spark Therapeutics and the National Heart, Lung, and Blood Institute; ClinicalTrials.gov numbers, NCT03003533 and NCT03432520.).
- Published
- 2021
49. Hepatic expression of GAA results in enhanced enzyme bioavailability in mice and non-human primates
- Author
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Catalina Abad, N. Danièle, Jayme M.L. Nordin, Giuseppe Ronzitti, Bernard Gjata, Helena Costa-Verdera, Simon Barral, Sean M. Armour, Marcelo Simon-Sola, Fanny Collaud, Marco Crosariol, Julien Fabregue, David A. Gross, Mathew Li, Jérémie Cosette, Laetitia van Wittenberghe, Pasqualina Colella, Maryse Moya-Nilges, G. Michael Preston, Christopher Riling, Xavier M. Anguela, Federico Mingozzi, Severine Charles, Pauline Sellier, Tom Antrilli, William J. Quinn, Umut Cagin, Jacomina Krijnse-Locker, Olivier Boyer, Généthon, Approches génétiques intégrées et nouvelles thérapies pour les maladies rares (INTEGRARE), Université d'Évry-Val-d'Essonne (UEVE)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris-Saclay-Généthon, Centre de recherche en Myologie – U974 SU-INSERM, Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU), Spark Therapeutics [Philadelphia, PA, USA], Institut Pasteur [Paris] (IP), Plateforme BioImagerie Ultrastructurale – Ultrastructural BioImaging Platform (UTechS UBI), Institute for Research and Innovation in Biomedicine (IRIB), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), This work was supported by Genethon and the French Muscular Dystrophy Association,the European Union’s research and innovation program under grant agreement no.667751 (to F.M.), the European Research Council Consolidator Grant under grantagreement no. 617432 (to F.M.), Marie Skłodowska-Curie Actions Individual Fellowship(MSCA-IF) grant agreement no. 797144 (to U.C.), a grant from the DIM ThérapieGénique (to D.A.G.) and by Spark Therapeutics under a sponsored research agreementto Genethon., ANR-16-CE92-0008,membrane dynamics,Rupture et réparation membranaire : stratégies d'assemblage virale(2016), European Project: 667751,H2020,H2020-PHC-2015-two-stage,MYOCURE(2016), European Project: 617432,EC:FP7:ERC,ERC-2013-CoG,MOMAAV(2014), Gestionnaire, Hal Sorbonne Université, Development of an innovative gene therapy platform to cure rare hereditary muscle disorders - MYOCURE - - H20202016-01-01 - 2019-12-31 - 667751 - VALID, Molecular signatures and Modulation of immunity to Adeno-Associated Virus vectors - MOMAAV - - EC:FP7:ERC2014-07-01 - 2019-06-30 - 617432 - VALID, Thérapie des maladies du muscle strié, Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU), and Institut Pasteur [Paris]
- Subjects
Male ,congenital, hereditary, and neonatal diseases and abnormalities ,Genetic enhancement ,Science ,Metabolic disorders ,General Physics and Astronomy ,Pharmacology ,General Biochemistry, Genetics and Molecular Biology ,Virus ,Article ,law.invention ,03 medical and health sciences ,Mice ,0302 clinical medicine ,Gene therapy ,Pharmacokinetics ,law ,Autophagy ,Distribution (pharmacology) ,Medicine ,Animals ,Enzyme Replacement Therapy ,030304 developmental biology ,chemistry.chemical_classification ,0303 health sciences ,Multidisciplinary ,[SDV.MHEP] Life Sciences [q-bio]/Human health and pathology ,business.industry ,Glycogen Storage Disease Type II ,nutritional and metabolic diseases ,alpha-Glucosidases ,General Chemistry ,Enzyme replacement therapy ,Phenotype ,3. Good health ,Enzyme ,chemistry ,Liver ,Recombinant DNA ,Female ,business ,030217 neurology & neurosurgery ,[SDV.MHEP]Life Sciences [q-bio]/Human health and pathology - Abstract
Pompe disease (PD) is a severe neuromuscular disorder caused by deficiency of the lysosomal enzyme acid alpha-glucosidase (GAA). PD is currently treated with enzyme replacement therapy (ERT) with intravenous infusions of recombinant human GAA (rhGAA). Although the introduction of ERT represents a breakthrough in the management of PD, the approach suffers from several shortcomings. Here, we developed a mouse model of PD to compare the efficacy of hepatic gene transfer with adeno-associated virus (AAV) vectors expressing secretable GAA with long-term ERT. Liver expression of GAA results in enhanced pharmacokinetics and uptake of the enzyme in peripheral tissues compared to ERT. Combination of gene transfer with pharmacological chaperones boosts GAA bioavailability, resulting in improved rescue of the PD phenotype. Scale-up of hepatic gene transfer to non-human primates also successfully results in enzyme secretion in blood and uptake in key target tissues, supporting the ongoing clinical translation of the approach., 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.
- Published
- 2021
50. First Differentiate and Then Operate (Or Not)
- Author
-
Xavier M. Keutgen
- Subjects
Oncology ,Surgery - Published
- 2022
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