background: multiple sclerosis (ms) is an autoimmune disease of the central nervous system (cns) caused by autoreactive t cells against myelin antigens. t-cell immunoglobulin mucin -3 (tim-3) is a negative regulator glycoprotein expressed by a range of immune cells, including, th1 cells, activated cd8+ t cells and in a lower level on th17 cells. a defect in tim-3 regulation has been shown in mu...