interleukin

(in-ter-LOO-kin) One of a group of related proteins made by leukocytes (white blood cells) and other cells in the body. Interleukins regulate immune responses. Interleukins made in the laboratory are used as biological response modifiers to boost the immune system in cancer therapy. An interleukin is a type of cytokine. Also called IL.

A group of proteins that transmit signals between immune cells and are necessary for mounting normal immune responses. See: cytokine.

Selected peptide or protein that primarily mediates local interactions between white blood cells.