A protein induced by macrophages and T cells in an immune reaction

proinflammatory cytokine produced by many cells, particularly macrophages; stimulates T and B cells, induces inflammatory responses and fever

A protein produced by various cells, including macrophages, interleukin-1 raises body temperature, spurs the production of interferon, and stimulates growth of disease-fighting cells, among other functions. Abbreviated IL-1.

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 IL-1, IL-1 alfa and IL-1 beta. Both forms of IL-1 are produced by the body, and can also be made in the laboratory.

A cytokine that mediates various inflammatory activities. Production of mature IL-1 requires caspase activity.