STAT6 protein is a transcription factor activated by cytokines, particularly interleukin 4 and IL 13. (STAT6-/-) were found to be deficient in IL 4 mediated functions including Th2 helper T cell differentiation, expression of cell surface markers, T cell proliferation, immunoglobulin class switching to IgE, and partial loss of IL 4 mediated proliferation. STAT6 mRNA has been detected in peripheral bloodlymphocytes, colon, intestine, ovary, prostate,thymus, spleen, kidney, liver, lung and placenta. STAT6 is critically involved in Th2 immune response.
