interleukin

Definition of interleukin

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.

Source: NCI Dictionary of Cancer Terms