T cell immunoglobulin and mucin domain–containing 3 (Tim-3) is an inhibitory receptor that is expressed on exhausted T cells and suppresses T helper type 1 (TH1) responses. Vijay Kuchroo and his colleagues show that human leukocyte antigen B (HLA-B)-associated transcript 3 (Bat3) binds intracellularly to Tim-3 and represses its function. Bat3 knockdown suppresses the development of experimental autoimmune encephalomyelitis and induces an exhaustion-like phenotype in T cells.
- Manu Rangachari
- Chen Zhu
- Vijay K Kuchroo