What specific receptor does nivolumab bind to boost the immune system?

What receptor does nivolumab bind to?

Nivolumab binds to the PD-1 (programmed death-1) receptor on T cells. By blocking the PD-1 pathway, it helps lift the “brakes” on T-cell activity, allowing the immune system to attack tumors more effectively. [1]

How does blocking PD-1 boost immune activity?

PD-1 normally dampens T-cell responses after it engages its ligands (PD-L1/PD-L2). When nivolumab blocks PD-1, the interaction is disrupted, so T cells can remain more active and sustain anti-tumor immune responses. [1]

Is nivolumab the same as drugs that bind PD-L1?

No. Nivolumab binds PD-1 on T cells, while separate immunotherapies target PD-L1 on tumor cells and/or other cells in the tumor environment. Both approaches affect the PD-1 signaling pathway, but the binding target differs. [1]

Sources

1. https://www.drugbank.com/drugs/DB01247