Medical Definition of gamma interferon
: an interferon produced by T cells that regulates the immune response (as by the activation of macrophages and natural killer cells) and is used in a form obtained from recombinant DNA in the control of infections associated with chronic granulomatous disease and sometimes in the treatment of other conditions (as basal cell carcinoma, Bowenoid papulosis, leukemia, or rheumatoid arthritis)—called also interferon gamma; compare alpha interferon, beta interferon
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