Question: how do pdl1 inhibitors work?
Answer: Checkpoint inhibitor drugs that target PD-1 or PD-L1 PD-1 is a checkpoint protein on immune cells called T cells. It normally acts as a type of “off switch” that helps keep the T cells from attacking other cells in the body. It does this when it attaches to PD-L1, a protein on some normal (and cancer) cells.