CD200–CD200R as a myeloid immune checkpoint in solid tumors: mechanisms, context-dependent functions, and therapeutic opportunities
CD200 and its receptor CD200R form a myeloid-centered immune checkpoint that normally restrains myeloid activation and limits tissue damage, but many solid tumors co-opt this pathway to suppress antitumor immunity. CD200–CD200R signaling is highly context-dependent, varying even among models of the same cancer type. In...