Genetics

A large multi-ancestry genome-wide association study expands the genetic map of multiple sclerosis. By integrating genetic risk data with cell-type-specific expression analyses from blood and brain tissue, the study identifies not only expected immune-cell involvement but also a notable contribution from inhibitory neurons, including MS-associated effects involving IL7 and STAT3. These findings suggest that MS susceptibility arises from complex neuroimmune interactions in which peripheral immune dysregulation and central nervous system cell vulnerability jointly influence disease onset and progression.