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interleukin-1 (in-ter-LOO-kin …)

 IL-1. A type of biological response modifier that stimulates immune system cells that fight disease and is involved in inflammatory responses. There are two forms of interleukin-1, interleukin-1-alfa and interleukin-1-beta. Both forms of interleukin-1 are produced by the body, and can also be made in the laboratory. Also called IL-1.

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