CD6 (分化簇6)

CD6 (Cluster of Differentiation 6) is a surface glycoprotein of T cells and a subset of B cells, and belongs to the superfamily of scavenger receptor cysteine-rich (SRCR) glycoproteins. CD166, ALCAM and CD318 are ligands for CD6. CD6 interacts with its ligands and plays a key role in thymocyte development, T cell activation and immune responses. CD6 is structurally similar to CD5. CD6 and CD5 have been regarded as co-stimulatory receptors that amplify T-cell receptor (TCR)-dependent activation. CD6 is an important target for therapy against autoimmune diseases, such as Anti-CD6 monoclonal antibody (mAb)^[1][2].