| First Author | Zhao Y | Year | 2013 |
| Journal | J Leukoc Biol | Volume | 94 |
| Issue | 6 | Pages | 1103-12 |
| PubMed ID | 23772040 | Mgi Jnum | J:209557 |
| Mgi Id | MGI:5568066 | Doi | 10.1189/jlb.0213064 |
| Citation | Zhao Y, et al. (2013) IL-4 induces a suppressive IL-10-producing CD8+ T cell population via a Cdkn2a-dependent mechanism. J Leukoc Biol 94(6):1103-12 |
| abstractText | CD8(+) T cells play an important role in immune regulation and effective immune responses against tumor cells, viral infection, and intracellular pathogens. In this report, using tiger or 10BiT mice, we defined a population of IL-10-producing CD8(+) T cells that were induced by IL-4. These IL-10(+)CD8(+) T cells possessed a strong inhibitory effect on the CD4(+) T cell proliferation in an IL-10-dependent and cell contact-dependent fashion. In comparison with IL-10(-)CD8(+) T cells, IL-10(+)CD8(+) T cells expressed an array of Th2-like cytokines (IL-4, IL-5), perforin, and granzymes, as well as the cell cycle regulatory protein Cdkn2a. Interestingly, knockdown of cdkn2a using siRNA reduced IL-4-induced IL-10 production significantly. Furthermore, CD8(+) T cells from Cdkn2a(-/-) mice produced a significantly lower amount of IL-10, and the effect was limited to CD8(+) T cells but not observed in CD4(+) T cells and APCs. Finally, IL-10(+)CD8(+) T cells played a protective role in the TNBS-induced murine colitis model, indicating a critical role of this population of CD8(+) T cells in regulatory immune responses. Taken together, we have defined a population of IL-10-producing CD8(+) Tregs induced by IL-4 and mediated by Cdkn2a. |
