Interleukin (IL)-4 production by human T cells: differential regulation of IL-4 vs. IL-2 production.
We have examined the regulation of interleukin (IL)-4 production by human peripheral blood T cells. Production of IL-4 was shown to be regulated differently from IL-2 and interferon(IFN)-gamma production. Stimulation of peripheral blood lymphocytes with anti-CD3, anti-CD2, anti-CD28, Phorbol 12-myristate 13-acetate (PMA) or IL-2 as a single stimulant did not induce IL-4 production. However, combinations of anti-CD2 with either anti-CD28 or IL-2 resulted in IL-4 production, peaking at days 3-4. Stimulation with anti-CD3 instead of anti-CD2 gave similar results, but was less potent. After days 3-4, IL-4 levels decreased, most likely due to consumption of IL-4. PMA profoundly affected cytokine production, it enhanced IL-2 production by at least tenfold, whereas, in the same cell population, IL-4 production was almost completely inhibited. This was observed at the protein as well as at the mRNA level. In contrast, agents that increase intracellular cAMP levels inhibited IL-2 production but left IL-4 production unaffected. IFN-gamma production behaved similar to IL-2 production but the effects were less outspoken.
Central Laboratory of the Netherlands Red Cross Blood Transfusion Service, Amsterdam.
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Van der Pouw-Kraan
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Van Kooten
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Rensink
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Aarden
D000945:Antigens, Differentiation, T-Lymphocyte / Q000502:physiology; D018801:CD2 Antigens; D017252:CD3 Complex; D002478:Cells, Cultured; D000242:Cyclic AMP / Q000502:physiology; D006801:Humans; D007376:Interleukin-2 / Q000096:biosynthesis*; D015847:Interleukin-4 / Q000096:biosynthesis*; D011493:Protein Kinase C / Q000502:physiology; D011948:Receptors, Antigen, T-Cell / Q000502:physiology; D011971:Receptors, Immunologic / Q000502:physiology; D013601:T-Lymphocytes / Q000378:metabolism*; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology; D015854:Up-Regulation
D000945:Antigens, Differentiation, T-Lymphocyte; D018801:CD2 Antigens; D017252:CD3 Complex; D007376:Interleukin-2; D011948:Receptors, Antigen, T-Cell; D011971:Receptors, Immunologic; D015847:Interleukin-4; D000242:Cyclic AMP; D011493:Protein Kinase C; D013755:Tetradecanoylphorbol Acetate