PD-1: Simple Plex

PD-1 (Programmed Death-1 receptor) is a key regulator of the threshold of immune response and peripheral immune tolerance. It is expressed on activated T cells, B cells, monocytes, and dendritic cells and binds to PD-L1 or PD-L2. PD-1 ligation induces co-inhibitory signals in T cells promoting their apoptosis, anergy, and functional exhaustion. Many tumors overexpress PD-L1 to induce this inhibitory signaling pathway in immune cells. When PD-1 expressing immune cells come into contact with a ...