Genetics

This blog post examines a recent genetic study investigating multiple sclerosis susceptibility in ancestrally diverse UK populations, with a focus on individuals of South Asian and African ancestry. The article highlights the persistent Eurocentric bias in MS genomics and explains how the authors used genome-wide association analysis, HLA allele imputation, and polygenic risk scoring to evaluate whether known European-derived MS risk variants are shared across populations. The findings show strong involvement of the Major Histocompatibility Complex, partial portability of European genetic risk scores, and evidence for broadly shared—but imperfectly overlapping—genetic architecture across ancestries. The study underscores the need for larger multi-ancestry cohorts to improve equitable genetic prediction, refine causal variant discovery, and advance biologically informed therapeutic research.