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IL-10 IS PRODUCED BY SUBSETS OF HUMAN CD4+ T-CELL CLONES AND PERIPHERAL-BLOOD T-CELLS
IL-10 IS PRODUCED BY SUBSETS OF HUMAN CD4+ T-CELL CLONES AND PERIPHERAL-BLOOD T-CELLS JOURNAL OF IMMUNOLOGY Yssel, H., Malefyt, R. D., Roncarolo, M. G., Abrams, J. S., Lahesmaa, R., Spits, H., deVries, J. E. 1992; 149 (7): 2378-2384Abstract
Murine IL-10 has been reported originally to be produced by the Th2 subset of CD4+ T cell clones. In this study, we demonstrate that human IL-10 is produced by Th0, Th1-, and Th2-like CD4+ T cell clones after both Ag-specific and polyclonal activation. In purified peripheral blood T cells, low, but significant, levels of IL-10 were found to be produced by the CD4+CD45RA+ population, whereas CD4+CD45RA- "memory" cells secreted 5- to 20-fold higher levels of IL-10. In addition, IL-10 was produced by activated CD8+ peripheral blood T cells. Optimal induction of IL-10 was observed after activation by specific Ag and by the combination of anti-CD3 mAb and the phorbol ester tetradecanoyl phorbol acetate, whereas the combination of calcium ionophore A23187 and 12-O-tetradecanoylphorbol-13-acetate acetate was a poor inducer of IL-10 production. Kinetic studies indicated that IL-10 was produced relatively late as compared with other cytokines. Maximal IL-10 mRNA expression in CD4+ T cell clones and purified peripheral blood T cells was obtained after 24 h, whereas maximal IL-10 protein synthesis occurred between 24 h and 48 h after activation. No differences were observed in the kinetics of IL-10 production among Th0, Th1-, and Th2-like subsets of CD4+ T cell clones. The results indicate a regulatory role for IL-10 in later phases of the immune response.
View details for Web of Science ID A1992JP18900020
View details for PubMedID 1356125