1,156 results match your criteria: "Amsterdam UMC - Location Vrije Universiteit Amsterdam[Affiliation]"

Endothelial-Ercc1 DNA repair deficiency provokes blood-brain barrier dysfunction.

Cell Death Dis

January 2025

Amsterdam UMC location Vrije Universiteit Amsterdam, Department of Molecular Cell Biology and Immunology, De Boelelaan 1117, 1081 HV, Amsterdam, The Netherlands.

Aging of the brain vasculature plays a key role in the development of neurovascular and neurodegenerative diseases, thereby contributing to cognitive impairment. Among other factors, DNA damage strongly promotes cellular aging, however, the role of genomic instability in brain endothelial cells (EC) and its potential effect on brain homeostasis is still largely unclear. We here investigated how endothelial aging impacts blood-brain barrier (BBB) function by using excision repair cross complementation group 1 (ERCC1)-deficient human brain ECs and an EC-specific Ercc1 knock out (EC-KO) mouse model.

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Vascularized human brain organoids: current possibilities and prospects.

Trends Biotechnol

January 2025

Department of Translational Neuroscience, University Medical Center Utrecht Brain Center, Utrecht University, Utrecht, The Netherlands. Electronic address:

Human brain organoids (hBOs) are in vitro, 3D, self-organizing brain tissue structures increasingly used for modeling brain development and disease. Although they traditionally lack vasculature, recent bioengineering developments enable their vascularization, which partly recapitulates neurodevelopmental processes such as neural tube angiogenesis, formation of neurovascular unit (NVU)-like structures, and early barriergenesis. Although vascularized hBOs (vhBOs) are already used to model (defects in) neurovascular development, vascularization efficiency and other outcomes differ substantially between vascularization protocols and overall shortcomings should be considered.

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Background: Delinquent behavior in adolescence is a prevalent issue, often associated with difficulties across multiple life domains, which in turn perpetuates negative life outcomes. While current treatment programs show partial success in improving behavioral changes and reducing recidivism, comprehensive conclusions regarding the overall efficacy of these interventions have yet to be established. In forensic outpatient settings, the discrepancy between adolescents' limited emotional awareness and the predominant emphasis on cognitive reflection, combined with low treatment adherence, may be factors that undermine treatment efficacy.

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Article Synopsis
  • The study examines trends and epidemiology of pediatric burns in Dutch burn centers from 2009 to 2022, highlighting the need for effective prevention strategies and resource allocation.
  • The analysis revealed a gradual increase in pediatric burn admissions, with a temporary decrease during the COVID-19 pandemic; 77% of patients were overnight admissions.
  • Young children (ages 0-3) were the most affected group, and a shift toward shorter hospital stays and increased day admissions was noted, especially during the pandemic.
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Article Synopsis
  • The study aimed to validate simpler methods for measuring [Ga]Ga-FAPI-46 uptake by comparing them to comprehensive pharmacokinetic modeling.
  • Ten patients with pancreatobiliary cancer participated in a 90-minute dynamic PET/CT scan, and various methods, including plasma-input tissue-compartment models, were used to assess the uptake of the compound in lesions.
  • The results indicated that image-based target-to-whole blood ratio (TBR) and mean standardized uptake values (SUVmean) at 60-70 minutes post-injection are effective and reliable for quantifying [Ga]Ga-FAPI-46 uptake.
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Introduction: Data regarding the incidence and outcomes of mismatch repair deficient (dMMR) rectal cancer is limited. This study characterizes dMMR rectal cancer patients, comparing response after neoadjuvant radiotherapy and oncological outcomes to mismatch repair proficient (pMMR) rectal cancer patients.

Method: A retrospective cross-sectional cohort study was conducted in 67 Dutch centers.

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Management of eosinophilic otitis media in the era of biological therapy: systematic review and proportion meta-analysis.

Rhinology

December 2024

Department of Otorhinolaryngology and Head and Neck Surgery, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands.

Background: Eosinophilic otitis media (EOM) is a recently recognised type 2 inflammatory disease, strongly associated with asthma and chronic rhinosinusitis with nasal polyps. Known as a difficult-to-treat condition, EOM is often refractory to traditional therapies for (chronic) otitis media. This review aims to assess the success rates of the different interventions for patients with EOM including newly available biological therapy.

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Introduction: General practitioners (GPs) often face challenges in explaining to patients with persistent physical symptoms (PPS) why their symptoms persist. Providing an explanation of the central sensitisation (CS) mechanism to patients could be helpful, yet GPs do not routinely test for signs of CS in these patients. The aim of this study was to explore the value of applying a test to assess CS in enhancing explanations provided to patients.

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Background: Climate change is the 21st century's biggest global health threat, endangering health care systems worldwide. Health care systems, and hospital care in particular, are also major contributors to greenhouse gas emissions.

Objectives: This study used a systematic search and screening process to review the carbon footprint of hospital services and care pathways, exploring key contributing factors and outlining the rationale for chosen services and care pathways in the studies.

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Identifying outcomes that matter most is key in driving specialized paediatric burn care. The aim of this study was to discover the most important outcomes for paediatric burns. Parents of children (0-3 year and 4-11 years old) and adolescents (12-17 yearss old) completed surveys to identify outcomes that matter most in the short-term (<6 months postburn) and long-term (6-24 months postburn).

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Deep dermal and full-thickness burns often result in scar sequelae such as contractures, hypertrophy, pain and itching following split-thickness skin grafting. Dermal substitutes are currently employed alongside split-thickness skin grafting to enhance clinical outcomes, though their indications remain a subject of ongoing debate. This systematic review aims to clarify the indications for the application of dermal substitutes in burn patients, in both acute and reconstructive settings.

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Background And Purpose: Segmentation imperfections (noise) in radiotherapy organ-at-risk segmentation naturally arise from specialist experience and image quality. Using clinical contours can result in sub-optimal convolutional neural network (CNN) training and performance, but manual curation is costly. We address the impact of simulated and clinical segmentation noise on CNN parotid gland (PG) segmentation performance and provide proof-of-concept for an easily implemented auto-curation countermeasure.

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Introduction: High-resolution anoscopy (HRA) to prevent anal cancer is complex and screening capacity is limited. Previously, we showed that DNA methylation analysis of anal high-grade squamous intraepithelial lesions (HSIL) biopsies can distinguish between HSIL with an increased cancer risk, and HSIL with a low cancer risk, in which treatment may be safely withheld. Here, we assessed the performance of methylation analysis in anal swabs to identify patients with underlying HSIL with an increased cancer risk.

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MRI-directed Micro-US-guided Transperineal Focal Laser Ablation for Localized Prostate Cancer: A 1-year Follow-up Study.

Radiology

December 2024

From the Departments of Radiology (F.C., A.L.) and Urology (M.G.), Clinique de l'Alma, 166 Rue de l'Université, 75007 Paris, France; Department of Urology, Amsterdam UMC location Vrije Universiteit Amsterdam, De Boelelaan 1117, 1081 HV Amsterdam, the Netherlands (K.d.B., L.v.R.); and Department of Pathology, i-Path Institut de Pathologie des Hauts-de-France, Amiens, France (P.C.).

Background MRI-guided focal laser ablation (FLA) is a promising treatment in localized prostate cancer (PCa). MRI-guided micro-US FLA shows potential for outpatient use, but its clinical application remains unexplored. Purpose To evaluate the safety, feasibility, and 12-month functional and oncologic outcomes of MRI-guided micro-US transperineal FLA in localized PCa and to assess the accuracy of micro-US in showing lesions depicted at MRI with Prostate Imaging Reporting and Data System (PI-RADS) score of 3 or higher.

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Background: Low- to middle-income countries face critical healthcare challenges. Equipping graduates with social responsiveness, the ability to address community health needs effectively, is essential. Despite its importance, research on integrating social responsiveness principles into medical and pharmacy curricula remains limited.

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Non-O1/non-O139 Vibrio cholerae (NOVC) strains are a distinct group of Vibrio cholerae that do not cause epidemic cholera. NOVC infections usually cause mild forms of gastroenteritis, and rarely severe (extra)intestinal infections, mostly affecting immunocompromised patients. Here, we describe the clinical course of a patient with NOVC bacteremia causing multiple liver abscesses, after drinking from a freshwater well in a non-coastal area.

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Fostering university students' autonomous motivation through a societal impact project: a qualitative study of students' and teachers' perspectives.

BMC Med Educ

December 2024

Department of Educational Development and Research, School of Health Professions Education, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, PObox 616, 6200MD, The Netherlands.

Background: Fostering students' autonomous motivation is linked to numerous positive outcomes. However, stimulating autonomous motivation of students in health professions remains a challenge. According to the Self-Determination Theory, supporting students' basic psychological needs for autonomy, relatedness, and competence fosters their autonomous motivation.

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Background: After childbirth, women often experience changes in sexual health. Little is known about the associated factors for the development of sexual health problems. Therefore, in this study we aim to investigate (1) how many women report changes in sexual health; (2) the prevalence and associated factors of women's postpartum sexual health problems and (3) whether women want to be better informed about postpartum sexual health after childbirth.

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Influence of the COVID-19 Pandemic on Influenza and SARS-CoV-2 Vaccination Willingness Among Dutch Nursing Home Health Care Workers.

J Am Med Dir Assoc

December 2024

Amsterdam UMC Location University of Amsterdam, Medical Microbiology and Infection Prevention, Amsterdam, the Netherlands; Amsterdam institute for Immunology and Infectious Diseases, Infectious Diseases, Amsterdam, the Netherlands.

Objectives: To explore the influenza and COVID-19 vaccination status among Dutch nursing home (NH) health care workers (HCWs), factors associated with vaccination including the influence of the pandemic, and the facilitators and barriers to vaccination willingness.

Design: An explanatory sequential mixed methods study.

Setting And Participants: HCWs providing direct care to residents in Dutch NHs.

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The effect of foot deformities on the interplay of forces within the foot: An analysis of multi-segment foot joint moments in cerebral palsy.

Gait Posture

December 2024

Amsterdam UMC location Vrije Universiteit Amsterdam, Rehabilitation Medicine, De Boelelaan 1117, Amsterdam, The Netherlands; Amsterdam Movement Sciences, Rehabilitation & Development, Amsterdam, The Netherlands; Amsterdam UMC location University of Amsterdam, Rehabilitation Medicine, Meibergdreef 9, Amsterdam, The Netherlands.

Background: Foot deformities are common in cerebral palsy (CP) and are likely caused by a disturbed interplay of forces in the foot. Evaluation of foot joint moments would therefore be highly relevant. However, kinetic foot models have not previously been applied to children with CP.

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G protein-coupled receptors: a gateway to targeting oncogenic EVs?

Extracell Vesicles Circ Nucl Acids

May 2024

Department of Chemistry and Pharmaceutical Sciences, Division of Medicinal Chemistry, Amsterdam Institute for Molecular and Life Sciences, Vrije Universiteit Amsterdam, Amsterdam 1081 HV, The Netherlands.

Dysregulated intercellular communication is a key feature driving cancer progression. Recently, extracellular vesicles (EVs) have added a new channel to this dense communication network. Despite solid evidence that EVs are central mediators of dysregulated signaling in onco-pathological settings, this has yet to be translated into clinically actionable strategies.

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Tension at the gate: sensing mechanical forces at the blood-brain barrier in health and disease.

J Neuroinflammation

December 2024

Department of Molecular Cell Biology and Immunology, Amsterdam UMC location Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam, The Netherlands.

Microvascular brain endothelial cells tightly limit the entry of blood components and peripheral cells into the brain by forming the blood-brain barrier (BBB). The BBB is regulated by a cascade of mechanical and chemical signals including shear stress and elasticity of the adjacent endothelial basement membrane (BM). During physiological aging, but especially in neurological diseases including multiple sclerosis (MS), stroke, small vessel disease, and Alzheimer's disease (AD), the BBB is exposed to inflammation, rigidity changes of the BM, and disturbed cerebral blood flow (CBF).

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Article Synopsis
  • The study explores the biological differences linked to PTSD by examining DNA methylation changes in blood, suggesting they could indicate susceptibility or effects of trauma.
  • Conducted by the Psychiatric Genomics Consortium, the research included nearly 5,100 participants to identify specific genetic markers associated with PTSD.
  • Results showed 11 significant CpG sites related to PTSD, with some also showing correlations between blood and brain tissue methylation, highlighting their potential role in understanding PTSD biology.
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Background: Multidisciplinary transitional care interventions aim to improve the coordination and continuity of healthcare during hospitalization and after discharge for patients with complex care needs related to physical, nutritional, or psychosocial status. Implementing such interventions is complex as they involve many stakeholders across multiple settings. Numerous studies have evaluated patients', family members', and healthcare professionals' experiences with multidisciplinary transitional care interventions, which can provide insight into facilitators and barriers to their implementation.

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TP8, A Novel Chondroinductive Peptide, Significantly Promoted Neo-Cartilage Repair without Activating Bone Formation.

Adv Healthc Mater

December 2024

Department of Temporomandibular Joint, School and Hospital of Stomatology, Guangdong Engineering Research Center of Oral Restoration and Reconstruction & Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou Medical University, Guangzhou, 510180, China.

The repair of large cartilage defects remains highly challenging in the fields of orthopedics and oral and maxillofacial surgery. A chondroinductive agent is promising to activate endogenous mesenchymal stem cells (MSCs) so as to facilitate cartilage regeneration. In this study, we analyze the crystallographic data of the critical binding domain of transforming growth factor β3 (TGF-β3) with its type II receptor and successfully develop a novel chondroinductive peptide - TGF-β3-derived peptide No.

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