PMID: 1624219Feb 1, 1992Paper

Potentiation of IL-2-induced t-cell proliferation by retinoids

International Journal of Immunopharmacology
X L JiangE W Lamon

Abstract

We evaluated the capacity of retinoids to potentiate proliferative responses of murine T-cells to recombinant human interleukin 2 (rIL-2). Concanavalin A (Con A) prestimulated spleen cells responded in a dose-dependent manner to added rIL-2. All-trans-retinoic acid (RA) at 10(-8) M potentiated the proliferative response by fivefold at saturating levels of IL-2. In similar experiments, two closely related retinamides, all-trans-(phenyl)retinamide (PR) and N-(4-hydroxyphenyl)retinamide (4-HPR), also potentiated murine splenocyte rIL-2 responses. Potentiation of IL-2-induced proliferation was dose-responsive to the concentration of added retinoid with peak potentiation occurring at 10(-10) - 10(-8) M in the presence of 10 U/ml rIL-2. Significant potentiation was observed at retinoid concentrations as low as 10(-14) M. Fluorescence flow cytometry of the responding cells revealed that among L3T4+, Lyt-2+ or total T-cells, at 72 h following Con A stimulation, essentially all of the cells expressed IL-2 receptors (IL-2R). This apparently represents near maximum IL-2R expression and treatment of the cells with retinoids did not increase IL-2R expression at that time point. The potentiation of IL-2 responses by retinoids was also observ...Continue Reading

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Citations

May 1, 1996·Journal of Clinical Immunology·M BallowL Brodsky
Apr 1, 1993·International Journal of Immunopharmacology·X L JiangE W Lamon
Aug 22, 2006·The Journal of Immunology : Official Journal of the American Association of Immunologists·Nikolai EngedalHeidi Kiil Blomhoff
Nov 1, 1995·Immunopharmacology and Immunotoxicology·I M DozmorovK C Park

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