Bile acid metabolomics reveals distinct immunometabolic niches and enables accurate diagnosis of AQP4-IgG–seronegative NMOSD
Background and ObjectiveDifferentiating neuromyelitis optica spectrum disorder (NMOSD) from multiple sclerosis (MS) is clinically difficult, especially when patients are seronegative for anti–aquaporin-4 immunoglobulin G (AQP4-IgG). Bile acids (BAs) fu…