Ipilimumab

Ipilimumab, sold under the brand name Yervoy, is a monoclonal antibody medication that works to activate the immune system by targeting CTLA-4, a protein receptor that downregulates the immune system. Cytotoxic T lymphocytes (CTLs) can recognize and destroy cancer cells. However, an inhibitory mechanism interrupts this destruction.[6] Ipilimumab turns off this inhibitory mechanism and boosts the body's immune response against cancer cells.[6][7]... [wikipedia]