Genetics

This blog post examines a recent Acta Neuropathologica study showing that a protective genetic variant in HIF1A is associated with lower long-term disability accrual in multiple sclerosis and reduced markers of smoldering inflammation. It explains how the researchers combined genetics, MRI, neurofilament biomarkers, post-mortem pathology, single-nucleus RNA sequencing, and spatial transcriptomics to link this variant to smaller paramagnetic rim lesions, less axonal injury, lower iron-associated chronic inflammation, and cell-type-specific effects in myeloid populations at lesion rims. The article highlights why these findings matter for understanding progressive MS and for identifying new therapeutic targets aimed at slowing disease progression.