70 results match your criteria: "Stellenbosch University Genomics of Brain Disorders Research Unit[Affiliation]"

A longitudinal analysis of neurocognitive profiles in South African women with HIV.

AIDS Care

January 2025

South African Medical Research Council / Stellenbosch University Genomics of Brain Disorders Research Unit, Department of Psychiatry, Stellenbosch University, Cape Town, South Africa.

HIV and the consequences of HIV-associated neurocognitive disorders (HAND) disproportionally affect South African women. Longitudinal neurocognitive data on women with HIV are limited. We tracked longitudinal neurocognitive profiles of South African women with HIV (baseline = 140) compared to women without HIV (baseline = 156).

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Background: The increased prevalence of physical diseases among individuals with mental illness contributes to their increased risk of mortality. However, the mediating role of specific diseases in the effect of mental illness on mortality is not well understood.

Method: We conducted a longitudinal causal mediation analysis using data from beneficiaries of a South African medical insurance scheme from 2011 to 2020.

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Introduction: Common mental disorders, such as anxiety disorders, depression, and posttraumatic stress disorder (PTSD), present a substantial health and economic burden. The gut microbiome has been associated with these psychiatric disorders via the microbiome-gut-brain axis. However, previous studies have focused on the associations between the gut microbiome and common mental disorders in European, North American, and Asian populations.

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Article Synopsis
  • Perceived social support plays a crucial role in predicting the severity of PTSD and complex PTSD symptoms after experiencing trauma, but gender differences in responses to this support have not been extensively studied.
  • In a study involving 2,483 adults across 39 countries, it was found that females reported higher PTSD and complex PTSD symptoms compared to males, while no significant gender differences in perceived social support were observed.
  • Both male and female participants with low perceived social support experienced greater PTSD and complex PTSD symptoms, with some evidence suggesting that the relationship between perceived social support and PTSD symptoms might be stronger for males.
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Alcohol use disorder (AUD) is the most prevalent substance use disorder but there is incomplete knowledge of the underlying molecular etiology. Here, we examined the cytosolic proteome from the nucleus accumbens core (NAcC) of ethanol drinking rhesus macaques to identify ethanol-sensitive signaling proteins. The targets were subsequently investigated using bioinformatics, genetic, and pharmacological manipulations in mouse models of ethanol drinking.

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Unlabelled: PURPOSE  : To assess gender differences in COVID-19 related changes in home and work responsibilities longitudinally, and determine whether these differences, together with other potential risk and protective factors, are associated with depression, anxiety, and post-traumatic stress disorder (PTSD) symptomatology.

Method: Symptoms of depression, anxiety, and PTSD were measured using an online survey instrument, between May 2020 and April 2021, in four waves completed at 3-monthly intervals. Analyses were based on data from the COvid MEntal healTh (COMET) survey which investigated the mental health effects of the COVID-19 outbreak spanning 13 countries on five continents in N = 7,909 participants.

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Article Synopsis
  • The study explores how copy number variations (CNVs) affect the development of Parkinson's disease (PD), aiming to identify new genetic mechanisms linked to sporadic cases of the disease.
  • Utilizing data from over 11,000 PD patients and nearly 9,000 controls, the researchers discovered 14 significant CNV loci associated with PD, including various gene duplications and deletions.
  • The research highlights a higher prevalence of CNVs in specific PD-related genes among patients and suggests that certain CNVs, especially those involving the gene, may lead to earlier onset of the disease in early-onset PD cases.
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Childhood maltreatment is linked to larger preferred interpersonal distances towards friends and strangers across the globe.

Transl Psychiatry

August 2024

Department of Consultation-Liaison Psychiatry and Psychosomatic Medicine, University Hospital, University of Zurich, Zurich, Switzerland.

Childhood maltreatment (CM) is thought to be associated with altered responses to social stimuli and interpersonal signals. However, limited evidence exists that CM is linked to larger comfortable interpersonal distance (CID) - the physical distance humans prefer towards others during social interactions. However, no previous study has investigated this association in a comprehensive sample, yielding sufficient statistical power.

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Childhood maltreatment (CM) is associated with various mental health disorders, including PTSD, depression, and anxiety. This study explores how specific classifications - dichotomous (abuse versus neglect) and dimensional (physical, emotional, sexual) - relate to distinct psychopathologies. We recruited 642 individuals, screening them for CM history and symptoms.

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Background: Until recently, about three-quarters of all monogenic Parkinson's disease (PD) studies were performed in European/White ancestry, thereby severely limiting our insights into genotype-phenotype relationships at a global scale.

Objective: To identify the multi-ancestry spectrum of monogenic PD.

Methods: The first systematic approach to embrace monogenic PD worldwide, The Michael J.

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Unlabelled: Serious games are increasingly being applied within healthcare, but their integration in psychotherapeutic settings is less documented.

Objectives: The present study sought to identify the attitudes of psychotherapists and patients towards the hypothetical use of serious games in psychotherapy in the South African context.

Methods: Online surveys assessed acceptance, experience, and requirements for the utilisation of serious games in therapeutic contexts.

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Posttraumatic stress disorder is characterized by functional dysregulation of dermal fibroblasts.

Biochimie

October 2024

Experimental Medicine Research Group, Division Internal Medicine, Department of Medicine, Faculty of Medicine & Health Sciences, Stellenbosch University, South Africa. Electronic address:

Incidence of mental health disorders are rising in modernity, with psychological stress linked to a propensity for developing various chronic diseases due to a relative inability of the body to counter the allostatic load on cellular level. Despite these high rates of comorbidities associated with posttraumatic stress disorder (PTSD), there is still a lack of understanding in terms of the peripheral effects of PTSD on tissue level. Therefore, the purpose of this study was to profile basal dermal fibroblast functional status in PTSD using a wide range of markers involved in the cell-to-cell communication facilitated by fibroblasts.

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Genetic screening of South African families with Parkinson's disease.

S Afr Med J

February 2024

Division of Molecular Biology and Human Genetics, Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa; and Medical Genetics, Tygerberg Hospital, Cape Town, South Africa.

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Aims: Prior research, largely focused on US male veterans, indicates an increased risk of cardiovascular disease among individuals with post-traumatic stress disorder (PTSD). Data from other settings and populations are scarce. The objective of this study is to examine PTSD as a risk factor for incident major adverse cardiovascular events (MACEs) in South Africa.

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The relationship between nutrient intake and executive function in adults with post-traumatic stress disorder.

J Affect Disord

March 2024

Department of Psychiatry, Faculty of Medicine and Health Sciences, Stellenbosch University, South Africa; South African Medical Research Council/Stellenbosch University Genomics of Brain Disorders Research Unit, Faculty of Medicine & Health Sciences, Stellenbosch University, Cape Town, South Africa.

Background: Executive function (EF) deficits are common in adults with post-traumatic stress disorder (PTSD). Macro- and micronutrient intake are potential modifiable factors that may influence EF in PTSD.

Objectives: To explore the relationship between the daily dietary intake of ω-3 and ω-6 polyunsaturated fatty acids (PUFAs), vitamin C, vitamin E, vitamin D, vitamin B12 and folate, and EF in adults with PTSD.

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Nanophytomedicines as Therapeutic Agents for Parkinson's Disease.

ACS Omega

November 2023

Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, Stellenbosch, Cape Town 7600, South Africa.

Phytochemicals are promising therapeutics for various neurodegenerative disorders, including Parkinson's disease (PD). However, their efficacy, pharmacokinetic properties, and penetration across the blood-brain barrier can be improved using delivery systems such as nanoparticles. We reviewed recently published work in which nanoparticles were used to deliver phytochemicals toward PD treatment.

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Article Synopsis
  • Parkinson's disease (PD) is a brain disorder affecting about 7 million people, with genetics playing a big role in some cases, especially in European people.
  • Most research has been done on people of European descent, leaving a gap in understanding how PD affects other groups.
  • To improve research and create new treatments, scientists have formed a global network of 59 research centers and developed tools like an online map to share information and resources with each other.
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Feasibility, acceptability and preliminary efficacy of a mental health self-management app in clinicians working during the COVID-19 pandemic: A pilot randomised controlled trial.

Psychiatry Res

November 2023

Department of Psychiatry, Faculty of Medicine and Health Sciences, Stellenbosch University, Francie van Zijl Drive, Tygerberg, Cape Town 7505, South Africa; South African Medical Research Council / Stellenbosch University Genomics of Brain Disorders Research Unit, Faculty of Medicine & Health Sciences, Stellenbosch University, Cape Town, South Africa. Electronic address:

COVID-19 affected the well-being of healthcare workers (HCWs) globally. Mental health app interventions (MHAIs) may offer appropriate and accessible means to support HCWs' mental health. We conducted a pilot randomised controlled crossover trial involving 34 clinicians randomised to either a MHAI or a waitlisted group.

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Long non-coding RNAs (lncRNAs) have been suggested as potential biomarkers for Parkinson's disease (PD). This study aimed to identify blood-based lncRNA transcripts that are dysregulated in PD over time and could serve as peripheral biomarkers. Using RNA-sequencing data from the Parkinson's Progression Markers Initiative, differential expression between case and control groups at five different time points was detected, and pathway analysis was conducted.

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Different pieces of the same puzzle: a multifaceted perspective on the complex biological basis of Parkinson's disease.

NPJ Parkinsons Dis

July 2023

Division of Molecular Biology and Human Genetics, Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa.

The biological basis of the neurodegenerative movement disorder, Parkinson's disease (PD), is still unclear despite it being 'discovered' over 200 years ago in Western Medicine. Based on current PD knowledge, there are widely varying theories as to its pathobiology. The aim of this article was to explore some of these different theories by summarizing the viewpoints of laboratory and clinician scientists in the PD field, on the biological basis of the disease.

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Article Synopsis
  • Genetic testing for Parkinson's disease is becoming more available, with advancements in methods and increasing interest in clinical, research, and direct-to-consumer settings.
  • Despite the growth in testing, there are currently no effective gene-targeted treatments, although clinical trials are in progress.
  • There are significant gaps and controversies in genetic testing practices, including the appropriateness of testing for different individuals, variations based on ethnicity, long-term outcomes of consumer testing, and the resources needed for clinical testing, highlighting the need for clear guidelines.
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International Genetic Testing and Counseling Practices for Parkinson's Disease.

Mov Disord

August 2023

Ken and Ruth Davee Department of Neurology, Northwestern University, Feinberg School of Medicine, Chicago, Illinois, USA.

Background: There is growing clinical and research utilization of genetic testing in Parkinson's disease (PD), including direct-to-consumer testing.

Objectives: The aim is to determine the international landscape of genetic testing in PD to inform future worldwide recommendations.

Methods: A web-based survey assessing current practices, concerns, and barriers to genetic testing and counseling was administered to the International Parkinson and Movement Disorders Society membership.

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