Publications by authors named "Vries P"

Background: Mental health disorders of children and adolescents represent a key area of concern, yet child and adolescent mental health services (CAMHS) are neglected, especially in low- and middle-income countries. There is a clear need to provide services that are relevant to the needs of service users, but little research to date has explored their needs and experiences of services, or to identify their recommendations for service strengthening. In 1997 the South African Government introduced the "Batho Pele" ('People First') initiative in all public sector services, with the aim of putting the voices of service users at the centre of decision-making of policy development and implementation.

View Article and Find Full Text PDF

Background And Objective: Intravesical instillation of chemotherapy (IIC) after radical surgery for upper urinary tract urothelial carcinoma (UTUC) reduces the risk of intravesical recurrence (IVR). However, compliance is low because of possible extravesical leakage after bladder cuff excision. The aim of this study was to evaluate the efficacy of preoperative IIC in reducing the risk of IVR.

View Article and Find Full Text PDF

Mosaic loss of Y (mLOY) is the most common somatic chromosomal alteration detected in human blood. The presence of mLOY is associated with altered blood cell counts and increased risk of Alzheimer disease, solid tumors, and other age-related diseases. We sought to gain a better understanding of genetic drivers and associated phenotypes of mLOY through analyses of whole-genome sequencing (WGS) of a large set of genetically diverse males from the Trans-Omics for Precision Medicine (TOPMed) program.

View Article and Find Full Text PDF

Polygenic risk scores (PRSs) depend on genetic ancestry due to differences in allele frequencies between ancestral populations. This leads to implementation challenges in diverse populations. We propose a framework to calibrate PRS based on ancestral makeup.

View Article and Find Full Text PDF

Background: Migratory bats perform seasonal movements between their summer and winter areas. When crossing ecological barriers, like the open sea, they are exposed to an increased mortality risk due to energetically demanding long-distance flights and unexpected inclement weather events. How such barriers affect bat migratory movements is still poorly known.

View Article and Find Full Text PDF

We were busy with an early autism caregiver-coaching programme in South Africa, when COVID-19 stopped all in-person work. We changed the programme so it could be done using computers and/or phones. Here, we describe programme changes (which we call the 'what') and the reasons for those changes (which we call the 'why').

View Article and Find Full Text PDF
Article Synopsis
  • The study examines the relationship between polygenic scores for coronary heart disease (CHD) and coronary artery calcium (CAC) in adults aged 75 and older, suggesting that genetic factors may influence arterial aging beyond traditional risk factors.
  • Researchers analyzed data from 1,865 participants, finding that higher polygenic CHD risk scores were associated with significantly lower odds of having no CAC and much higher odds of having high CAC levels.
  • Each standard deviation increase in the polygenic risk score corresponded to a 78% increase in CAC scores, indicating a strong link between genetic predisposition and arterial health in older adults.
View Article and Find Full Text PDF

Dreicer generation is one of the main mechanisms of runaway electron generation in weakly ionized plasmas. It is often described as a diffusive flow from the Maxwellian core into high energies under the effect of the electric field. In this Letter we demonstrate a critical role of the binary nature of inelastic collisions in weakly ionized plasma during tokamak startup, where some electrons experience virtually no collisions during acceleration to the critical energy.

View Article and Find Full Text PDF

The increasing number of women of childbearing age with gynecological uterine scars presents a significant clinical challenge. -Planning the route of birth for a subsequent pregnancy necessitates -careful consideration and should be the subject of an informed -discussion. Unfortunately, the heterogeneity of data in the literature with regards to gynecological uterine scars makes this choice -debatable.

View Article and Find Full Text PDF
Article Synopsis
  • Whole genome sequencing (WGS) helps identify rare genetic variants that may explain the missing heritability of coronary artery disease (CAD) by analyzing 4,949 cases and 17,494 controls from the NHLBI TOPMed program.
  • The study estimates that the heritability of CAD is around 34.3%, with ultra-rare variants contributing about 50%, especially those with low linkage disequilibrium.
  • Functional annotations show significant enrichment of CAD heritability, highlighting the importance of ultra-rare variants and specific regulatory mechanisms in different cells as major factors influencing genetic risk for the disease.
View Article and Find Full Text PDF

Background And Objective: A survival benefit was demonstrated for patients with low-volume synchronous metastatic hormone-sensitive prostate cancer (mHSPCa) when local radiotherapy to the prostate was added to androgen deprivation therapy. This study aims to determine the incidence of prostate cancer-related events and treatments in those who received and those who did not receive external beam radiotherapy for mHSPCa.

Methods: The HORRAD trial is a multicentre randomised controlled trial recruiting originally 432 patients with mHSPCa diagnosed between 2004 and 2014.

View Article and Find Full Text PDF
Article Synopsis
  • Researchers aimed to find new genetic variants that are linked to both fibrinogen and C-reactive protein (CRP) by conducting a bivariate genome-wide association study (GWAS).
  • The study analyzed data from over 480,000 participants to identify 87 shared genetic loci, including 58 new ones, that are associated with fibrinogen and CRP levels.
  • The findings indicate significant overlap between the genetic factors affecting fibrinogen and CRP, suggesting they may share a common genetic architecture.
View Article and Find Full Text PDF
Article Synopsis
  • * We found 17 genetic loci associated with sleep duration impacting lipid levels, with 10 of them being newly identified and linked to sleep-related disturbances in lipid metabolism.
  • * The research points to potential drug targets that could lead to new treatments for lipid-related issues in individuals with sleep problems, highlighting the connection between sleep patterns and cardiovascular health.
View Article and Find Full Text PDF
Article Synopsis
  • Genetic studies have highlighted the need for more diverse research on plasma fibrinogen levels, as previous studies largely focused on Europeans, leading to gaps in understanding and missing heritability.
  • By analyzing data from whole-genome sequencing and genotype data from large cohorts, researchers identified 18 genetic loci related to fibrinogen levels, some of which are more common in African populations and include variants that may impact protein function.
  • The study's findings indicate a connection between fibrinogen levels and various health conditions, emphasizing the importance of whole-genome sequencing in discovering genetic factors in diverse populations and enhancing knowledge about fibrinogen regulation.
View Article and Find Full Text PDF

The plasma protein fibrinogen is encoded by 3 structural genes (FGA, FGB, and FGG) that are transcribed to mRNA, spliced, and translated to 3 polypeptide chains (Aα, Bβ, and γ, respectively). These chains are targeted for secretion, decorated with post-translational modifications, and assembled into a hexameric "dimer of trimers" (AαBβγ). Fully assembled fibrinogen is secreted into the blood as a 340 kDa glycoprotein.

View Article and Find Full Text PDF

The US EPA ECOTOX database provides key ecotoxicological data that are crucial in environmental risk assessment. It can be used for computational predictions of toxicity or indications of hazard in a wide range of situations. There is no standardised or formalised method for extracting and subsetting data from the database for these purposes.

View Article and Find Full Text PDF

Although both short and long sleep duration are associated with elevated hypertension risk, our understanding of their interplay with biological pathways governing blood pressure remains limited. To address this, we carried out genome-wide cross-population gene-by-short-sleep and long-sleep duration interaction analyses for three blood pressure traits (systolic, diastolic, and pulse pressure) in 811,405 individuals from diverse population groups. We discover 22 novel gene-sleep duration interaction loci for blood pressure, mapped to 23 genes.

View Article and Find Full Text PDF

Background: In surgery, simulated-based training improves the knowledge and interpersonal skills needed for surgeons to improve their performance and meet the "never the first time on a patient" imperative. The objective is to evaluate the effects of a 2017 reform on surgeon's accessibility to simulation-based training, five years after the implementation of the program, and to gauge surgeon satisfaction.

Methods: A 27-item national online survey was sent to all surgical residents and fellows in the 13 surgical specialties.

View Article and Find Full Text PDF

Objective: This study aimed (1) to assess the association between the length of the third stage of labor and adverse maternal outcome after vaginal birth and (2) to evaluate whether earlier manual placenta removal reduces the risk of adverse outcome.

Data Sources: PubMed, MEDLINE, Embase, ClinicalTrials.gov, the Cochrane Library, Journals@Ovid, and the World Health Organization International Clinical Trials Registry were searched from January 1, 2000, to June 13, 2023.

View Article and Find Full Text PDF
Article Synopsis
  • Obstetric hemorrhage is a significant cause of maternal mortality that can be largely prevented, yet surgical injury during cesarean sections has become more common in France as a contributing factor to this issue.
  • A nationwide study analyzed maternal deaths from surgical injuries during cesareans in France from 2007 to 2018, revealing a concerning trend of increasing mortality ratios despite overall improvements in maternal health outcomes.
  • Key findings indicate that factors such as obesity, prior cesareans, and inadequate facilities played a significant role in these deaths, highlighting the need for improved care processes and risk factor management to enhance maternal safety.
View Article and Find Full Text PDF

Ecosystem services link the status of biodiversity and its functioning to societal goods and benefits contributing to human wellbeing. As such, they can play a key role in preserving the environment and managing natural resources and ecosystems to conserve nature's contributions to people. Identification of the main threats acting on the natural environment, and how these may impact its capacity to supply ecosystem services, is fundamental to the maintenance of these services.

View Article and Find Full Text PDF
Article Synopsis
  • Coronary artery calcification (CAC) is linked to heart disease and assessed through a genome-wide association study (GWAS) involving 22,400 participants from various backgrounds.
  • The study confirmed connections with four known genetic loci and discovered two new loci related to CAC, with supportive replication findings for both.
  • Functional tests suggest that ARSE promotes calcification in vascular smooth muscle cells and its variants may influence CAC levels, identifying ARSE as a key target for potential treatments in vascular calcific diseases.
View Article and Find Full Text PDF
Article Synopsis
  • The study analyzed changes in the incidence and causes of maternal deaths due to obstetric hemorrhage in France from 2001 to 2015, focusing on the impact of national guidelines implemented in 2004 and updated in 2014.
  • Findings revealed a significant drop in the maternal mortality ratio (MMR) from 2.3 to 0.8 per 100,000 livebirths, with a notable decrease in deaths from uterine atony.
  • Despite improved clinical care, 88% of maternal deaths from hemorrhage were still considered preventable, highlighting areas needing further improvement in diagnosis and surgical management.
View Article and Find Full Text PDF

Background: Despite a massive global increase in research on gender-diverse youth, there have been no studies in Africa on gender-diverse children and adolescents presenting to health services.

Aim: This study aimed to present the first African findings of the demographic and mental health profile of youth who have presented at a gender service in South Africa.

Setting: A specialist mental health outpatient service, consisting of psychiatry, psychology and nursing input, for gender-diverse child and adolescent patients in the Western Cape.

View Article and Find Full Text PDF