Researchers at Keio University (including Shohei Suzuki and Tomohisa Sujino) reported a mechanistic link between intestinal epithelial cells and multiple sclerosis-related neuroinflammation. In mouse models of experimental autoimmune encephalomyelitis (EAE) and analyses of patient intestinal tissues, the team found increased TH17 cells and elevated MHC class II expression in intestinal epithelial cells (IECs). Functionally, deleting MHC II in IECs reduced TH17 accumulation in the gut and lowered EAE severity, supporting IECs as an immune “education” site that can trigger CNS autoimmunity. The findings were published in Science Immunology under the paper “Intestinal Epithelial MHC Class II Induces Encephalitogenic CD4⁺ T Cells and Initiates Central Nerves System Autoimmunity.” The study points to intestinal antigen-presenting activity as a potential therapeutic target distinct from current MS approaches centered on B cells, expanding where drug developers may aim to intervene.