Modulatory roles of RANTES in IL-4 production by human blood CD4(+)T cells

Cytokine
S SaitoY Kawakami

Abstract

An increase in serum IgE levels has been reported in several thrombotic cardiovascular diseases. Since such diseases are associated with the activation of platelets, we hypothesized that platelets are implicated in a mechanism leading to heightened IgE synthesis. To this end, we performed an in vitro investigation of the effects on IL-4 production caused by several bioactive substances potentially released from platelets. Human blood CD4(+)T cells from blood donors were stimulated with anti-CD3 antibody and costimulatory signals delivered via CD58 and CD80 in the presence or absence of IL-4. One of the following test substances was also included in the culture: platelet factor-4, beta-thromboglobulin, platelet-derived growth factor, serotonin, platelet activating factor, or RANTES. The cells were restimulated in the absence of IL-4 and test substances. Among the six substances, RANTES alone exhibited significant effects on IL-4 production. RANTES enhanced IL-4 production in the presence of IL-4, whereas it suppressed IL-4 production in the absence of IL-4. The enhancing effect of RANTES was positively correlated with plasma IgE levels in the donors. We concluded that RANTES may induce IgE synthesis by increasing IL-4 production...Continue Reading

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Citations

Sep 6, 2012·Proceedings of the National Academy of Sciences of the United States of America·Anna K CoussensAdrian R Martineau
Sep 9, 2009·International Immunopharmacology·Tooba GhazanfariZuhair M Hassan

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