interferon
interferon (IFN) Any of a number of proteins (see cytokine) that increase the resistance of a cell to attack by viruses by unmasking genes that synthesize antiviral proteins. In humans, three groups of interferons have been discovered: α-interferons from white blood cells; β-interferons from connective tissue fibroblasts; and γ-interferons from lymphocytes (see interleukin). Interferons are also produced by lymphocyte killer cells, which attack altered tissue cells, such as cancer cells. This converts other normal lymphocytes to killer cells and effects other changes in the immune system. Interferons produced using genetically engineered bacteria are used for treating some forms of hepatitis, some cancers, and multiple sclerosis.
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interferon
