NCIt definition : An agonistic antibody for the inducible T-cell co-stimulator (ICOS; CD278), with potential
immune checkpoint inhibitory and antineoplastic activities. Upon administration, feladilimab
targets and binds to ICOS expressed on tumor infiltrating CD4-positive T-cells. This
stimulates ICOS-positive T-cell proliferation, enhances cytotoxic T-lymphocyte (CTL)
survival and increases CTL-mediated immune responses against tumor cells. ICOS, a
T-cell specific, CD28-superfamily costimulatory molecule and immune checkpoint protein,
is normally expressed on certain activated T-cells and plays a key role in the proliferation
and activation of T-cells.;