Publications by authors named "Ramsay M"

Since its inception in 2003, the African Society of Human Genetics (AfSHG) has been central to the promotion of genetics research on the continent, and facilitated the networking of African researchers within Africa and abroad, thereby significantly contributing to the career development of African geneticists. The continuation of these accomplishments was stimulated by the 12 international conference of AfSHG held jointly with the 1 Congress of the Malian Society of Human Genetics (MSHG) in Bamako, Mali from September 18 to 21 2019. The main theme of the conference was "Human Genetics and Genomics as a Unifying Factor for Harmony and Progress in Africa".

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Introduction: Nursing students internationally entered challenging clinical placements during COVID-19. Lessons learnt could inform nurse education planning, particularly in preparation to implement future workforce plans.

Aim: This study aimed to explore the impact of COVID-19 on nursing students undertaking clinical placements across the UK, particularly the extent to which nursing education prior to and during COVID-19 had prepared them for placements, and to distil key messages for future nursing education.

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Article Synopsis
  • A new environment-adjusted meta-regression model (env-MR-MEGA) improves the detection of genetic associations in diverse populations by considering both environmental and ancestral differences.
  • Simulations show that env-MR-MEGA is at least as powerful as traditional methods, especially when environmental factors strongly correlate with traits.
  • In a study of low-density lipoprotein cholesterol across 19,000 individuals, the model identified additional genetic variants influenced by factors beyond ancestry, demonstrating its effectiveness in analyzing complex traits without sharing individual data.
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Importance: Primary open-angle glaucoma (POAG) polygenic risk scores (PRSs) continue to be evaluated in primarily European-ancestry populations despite higher prevalence and worse outcomes in African-ancestry populations.

Objective: To evaluate how established POAG PRSs perform in African-ancestry samples from the Genetics in Glaucoma Patients of African Descent (GIGA), Genetics of Glaucoma in Individuals of African Descent (GGLAD), and Million Veteran Program (MVP) datasets and compare these with European-ancestry samples.

Design, Setting, And Participants: This was a multicenter, cross-sectional study of POAG cases and controls from Tanzania, South Africa, Nigeria, Ghana, and the US.

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New wearable devices and technologies provide unprecedented scope to augment or substitute human perceptual abilities. However, the flexibility to reorganize brain processing to use novel sensory signals during early sensitive periods in infancy is much less evident at later ages, making integration of new signals into adults' perception a significant challenge. We believe that an approach informed by cognitive neuroscience is crucial for maximizing the true potential of new sensory technologies.

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Background: Obstructive sleep apnoea (OSA) is the most common sleep-related breathing disorder. Non-invasive ventilation (NIV) is essential for managing hypercapnic respiratory failure in patients with obesity hypoventilation syndrome (OHS) and those with co-existing OSA, where continuous positive airway pressure (CPAP) alone is insufficient. However, adherence to NIV can be challenging, with substantial non-compliance occurring due to factors such as discomfort and phobia.

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  • Chronic hepatitis B virus (HBV) prevalence and undiagnosed cases in the UK, even with low rates, are hard to measure accurately; this study uses public health data to estimate prevalence among different ethnic groups.
  • Out of 714,287 women tested during antenatal care, 0.6% were HBsAg-positive, predominantly from non-White British backgrounds; similarly, 1.9% tested positive in other healthcare settings.
  • The study estimates around 268,767 chronic HBV cases in England, with a significant concentration in ethnic minorities, indicating a challenge in meeting WHO targets for HBV elimination as a public health issue.
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  • Sniff nasal inspiratory pressure (SNIP) is a method to evaluate respiratory muscle strength, particularly in neuromuscular diseases like ALS, and the effects of nostril occlusion and mouth sealing on SNIP measurements were examined.
  • A study involving 81 participants found that occluding the contralateral nostril significantly increased SNIP measurements across all groups, while opening the mouth led to a notable decrease in SNIP values.
  • The results highlight the importance of proper technique in measuring SNIP, as using nostril occlusion could lead to fewer individuals qualifying for non-invasive ventilation, affecting clinical decisions and longitudinal studies.
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  • The UK shifted to a 1+1 infant immunization schedule for the PCV13 vaccine starting January 1, 2020, and a study analyzed its impact on invasive pneumococcal disease (IPD) in children aged 0-3 years.
  • A comparison was made between a birth cohort eligible for the new 1+1 schedule and historical cohorts under the previous 2+1 schedule, examining various metrics like incidence rates and clinical outcomes.
  • Findings showed no significant differences in IPD incidence, disease characteristics, or outcomes between the 1+1 and 2+1 cohorts after three years, indicating the new schedule did not adversely affect health outcomes in eligible children.
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Background: Angiotensin-converting enzyme inhibitor-induced angioedema (AE-ACEI) is a life-threatening adverse event and, globally, the commonest cause of emergency presentations with angioedema. Several large genome-wide association studies (GWAS) have found genomic associations with AE-ACEI. However, despite African Americans having a 5-fold increased risk of AE-ACEI, there are no published GWAS from Africa.

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Reported mpox cases in England continued at a low but steady frequency during 2023. Of 137 cases reported in 2023, approximately half were acquired overseas and half were in vaccinated persons. Estimated effectiveness of 2-dose vaccine was 80%, and no vaccinated mpox patient was hospitalized.

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Socio-economic status of participants in many public health, epidemiological, and genome-wide association studies is an important trait of interest. It is often used in these studies as a measure of direct interest or as a covariate. The Africa Wits INDEPTH Partnership for Genomic and Environmental Research (AWI-Gen) explores genomic and environmental factors in non-communicable diseases, particularly cardio-metabolic disease.

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Background: Cardiovascular diseases (CVD) are a major health concern in Africa. Improved identification and treatment of high-risk individuals can reduce adverse health outcomes. Current CVD risk calculators are largely unvalidated in African populations and overlook genetic factors.

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Epigenetic modifications influence gene expression levels, impact organismal traits, and play a role in the development of diseases. Therefore, variants in genes involved in epigenetic processes are likely to be important in disease susceptibility, and the frequency of variants may vary between populations with African and European ancestries. Here, we analyse an integrated dataset to define the frequencies, associated traits, and functional impact of epigenetic gene variants among individuals of African and European ancestry represented in the UK Biobank.

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Article Synopsis
  • - The UK is reassessing its meningococcal disease vaccination strategy due to the discontinuation of the Menitorix® vaccine, with the MenACWY vaccine being considered a key solution integrated into teenage immunizations, while infant vaccination remains important due to high incidence rates.
  • - Two UK studies were analyzed to adjust age-specific meningococcal carriage data, utilizing a dynamic model to assess the effects of MenACWY vaccinations for teenagers and infants, also factoring in changes during COVID-19 lockdowns.
  • - Projections suggest the teenage MenACWY vaccination will effectively reduce disease carriage to below 1% by 2025, while infant vaccination at 3 months is more effective in preventing cases than at 12 months
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Building longitudinal population cohorts in Africa for coordinated research and surveillance can influence the setting of national health priorities, lead to the introduction of appropriate interventions, and provide evidence for targeted treatment, leading to better health across the continent. However, compared to cohorts from the global north, longitudinal continental African population cohorts remain scarce, are relatively small in size, and lack data complexity. As infections and noncommunicable diseases disproportionately affect Africa's approximately 1.

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Since November 2023, the absolute number of attendances at emergency departments for pneumonia among children aged 5-14 years in England have been above expected levels for the time of year. This increased signal peaked during March 2024 but then persisted into early summer 2024 despite decreases in prevalence of seasonal respiratory pathogens. Record linkage between emergency department and laboratory databases points to this unusual activity being driven largely by .

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Structural variants are responsible for a large part of genomic variation between individuals and play a role in both common and rare diseases. Databases cataloguing structural variants notably do not represent the full spectrum of global diversity, particularly missing information from most African populations. To address this representation gap, we analysed 1,091 high-coverage African genomes, 545 of which are public data sets, and 546 which have been analysed for structural variants for the first time.

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Background: Menopause and HIV are associated with cardiometabolic disease. In sub-Saharan Africa there is a growing population of midlife women living with HIV and a high prevalence of cardiometabolic disease.

Objectives: The aim of this study was to determine whether menopause and HIV were associated with cardiometabolic disease risk factors in a population of midlife sub-Saharan African women.

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Article Synopsis
  • - Precision medicine aims to enhance the accuracy and reliability of health recommendations while ensuring safety and cost-effectiveness, but faces challenges due to the diverse nature of diseases and the lack of standardized reporting in research.
  • - The BePRECISE consortium, made up of 23 experts, developed a 23-item checklist to improve the reporting of precision medicine research, using a thorough review process to create guidelines.
  • - The checklist promotes inclusivity in research by emphasizing health equity, encouraging the involvement of under-represented communities, which can help with the effective and fair application of precision medicine in clinical settings.
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Same-sex sexual behaviour (SSSB) occurs in most animal clades, but published reports are largely concentrated in a few taxa. Thus, there remains a paucity of published reports for most mammalian species. We conducted a cross-sectional expert survey to better understand the underlying reasons for the lack of publications on this topic.

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