interferon

A family of small proteins that stimulate viral resistance in cells.

One of a group of small proteins synthesized by certain T cells of vertebrates, which inhibit virus replication. There are three types of interferon in humans. See: cytokine.

(in-ter-FEER-on) A biological response modifier (a substance that can improve the body's natural response to infections and other diseases). Interferons interfere with the division of cancer cells and can slow tumor growth. There are several types of interferons, including interferon-alpha, -beta, and -gamma. The body normally produces these substances. They are also made in the laboratory to treat cancer and other diseases.