The heterogeneity of multiple sclerosis evolution relies on several pathophysiological mechanisms including neuroinflammation, neurodegeneration and remyelination and repair mechanisms.
The study will identify markers of disease severity in a longitudinal cohort of patients with multiple sclerosis who are siblings (both siblings having multiple sclerosis) including: biological markers (genetic, immunological and epigenetic markers, advanced MRI markers). An integrative model to predict disease progression will be proposed based on multimodal markers.