IL

Definition / meaning of IL

One of a group of related proteins made by leukocytes (white blood cells) and other cells in the body. ILs regulate immune responses. ILs 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 interleukin.

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Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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