Summary
This meta-analysis of genome-wide association data from 10,775 individuals across three sub-Saharan African regions identifies two novel genetic signals associated with blood pressure traits: one near P2RY1 for systolic blood pressure and one near LINC01256 for pulse pressure. The study addresses a significant gap in hypertension genetics research, which has historically under-represented African populations despite the high prevalence of hypertension in Africa. Notably, the findings demonstrate that polygenic risk scores developed in other ancestries have limited transferability to African populations, whereas multi-ancestry PRSs provide improved prediction.
UK applicability
The findings have limited direct applicability to UK clinical practice, as they are specific to sub-Saharan African genetic architecture and populations. However, the demonstration that ancestry-specific and multi-ancestry approaches improve genetic risk prediction is relevant to UK healthcare systems serving diverse populations, suggesting that risk stratification tools should incorporate ancestry-specific genetic data for equitable care.
Key measures
Systolic blood pressure, diastolic blood pressure, pulse pressure, mean-arterial pressure, hypertension status, genome-wide association signals (p-values), polygenic risk scores (PRSs), SNP associations
Outcomes reported
The study identified genome-wide significant genetic associations with blood pressure-related traits (systolic and diastolic BP, pulse pressure, mean-arterial pressure, and hypertension) in sub-Saharan African populations. It also evaluated the transferability and predictive performance of polygenic risk scores across different ancestry populations.
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