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At least two PD-L1 inhibitors are in the experimental phase of development. KN035 is the only PD-L1 antibody with subcutaneous formulation currently under clinical evaluations in the US, China, and Japan [35] Cosibelimab (CK-301) by Checkpoint Therapeutics is a PD-L1 inhibitor developed by Dana Farber, and is currently in Phase 3 trials for ...
The affinity between PD-L1 and PD-1, as defined by the dissociation constant K d, is 770 nM. PD-L1 also has an appreciable affinity for the costimulatory molecule CD80 (B7-1), but not CD86 (B7-2). [11] CD80's affinity for PD-L1, 1.4 μM, is intermediate between its affinity for CD28 and CTLA-4 (4.0 μM and 400 nM
Programmed cell death protein 1 (PD-1), (CD279 cluster of differentiation 279). PD-1 is a protein encoded in humans by the PDCD1 gene. [5] [6] PD-1 is a cell surface receptor on T cells and B cells that has a role in regulating the immune system's response to the cells of the human body by down-regulating the immune system and promoting self-tolerance by suppressing T cell inflammatory activity.