| First Author | Kiniwa T | Year | 2016 |
| Journal | Proc Natl Acad Sci U S A | Volume | 113 |
| Issue | 36 | Pages | 10139-44 |
| PubMed ID | 27551096 | Mgi Jnum | J:235585 |
| Mgi Id | MGI:5796865 | Doi | 10.1073/pnas.1600112113 |
| Citation | Kiniwa T, et al. (2016) NK cells activated by Interleukin-4 in cooperation with Interleukin-15 exhibit distinctive characteristics. Proc Natl Acad Sci U S A 113(36):10139-44 |
| abstractText | Natural killer (NK) cells are known to be activated by Th1-type cytokines, such as IL-2, -12, or -18, and they secrete a large amount of IFN-gamma that accelerates Th1-type responses. However, the roles of NK cells in Th2-type responses have remained unclear. Because IL-4 acts as an initiator of Th2-type responses, we examined the characteristics of NK cells in mice overexpressing IL-4. In this study, we report that IL-4 overexpression induces distinctive characteristics of NK cells (B220(high)/CD11b(low)/IL-18Ralpha(low)), which are different from mature conventional NK (cNK) cells (B220(low)/CD11b(high)/IL-18Ralpha(high)). IL-4 overexpression induces proliferation of tissue-resident macrophages, which contributes to NK cell proliferation via production of IL-15. These IL-4-induced NK cells (IL4-NK cells) produce higher levels of IFN-gamma, IL-10, and GM-CSF, and exhibit high cytotoxicity compared with cNK cells. Furthermore, incubation of cNK cells with IL-15 and IL-4 alters their phenotype to that similar to IL4-NK cells. Finally, parasitic infection, which typically causes strong Th2-type responses, induces the development of NK cells with characteristics similar to IL4-NK cells. These IL4-NK-like cells do not develop in IL-4Ralpha KO mice by parasitic infection. Collectively, these results suggest a novel role of IL-4 in immune responses through the induction of the unique NK cells. |
