Fig. 1From: The role of immune checkpoint inhibition in the treatment of ovarian cancerCostimulatory and coinhibitory pathways regulate the T-cell response to antigen. APC: antigen-presenting cell, CTLA-4: cytotoxic T lymphocyte-associated protein 4, MHC: major histocompatibility complex, PD-1: programmed cell death protein 1; PD-L1: PD-1 ligand, TCR: T-cell receptorBack to article page