Summary: A new study has identified the protein hnRNP A1 as a key player in the production and maintenance of myelin, the fatty sheath that insulates nerve fibers in the brain. Myelin loss is common in disorders like multiple sclerosis and schizophrenia, and this research shows that hnRNP A1 disruptions can impair myelination at the molecular level, even before behavioral symptoms appear.Using a rodent model, scientists induced and later reversed demyelination to track the effects on memory, motor function, and social behavior. The findings offer fresh insight into...