Dardalhon Valérie, Awasthi Amit, Kwon Hyoung, Galileos George, Gao Wenda, Sobel Raymond A, Mitsdoerffer Meike, Strom Terry B, Elyaman Wassim, Ho I-Cheng, Khoury Samia, Oukka Mohamed, Kuchroo Vijay K
Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Cambridge, Massachusetts 02139, USA.
Nat Immunol. 2008 Dec;9(12):1347-55. doi: 10.1038/ni.1677. Epub 2008 Nov 9.
Transcription factor Foxp3 is critical for generating regulatory T cells (T(reg) cells). Transforming growth factor-beta (TGF-beta) induces Foxp3 and suppressive T(reg) cells from naive T cells, whereas interleukin 6 (IL-6) inhibits the generation of inducible T(reg) cells. Here we show that IL-4 blocked the generation of TGF-beta-induced Foxp3(+) T(reg) cells and instead induced a population of T helper cells that produced IL-9 and IL-10. The IL-9(+)IL-10(+) T cells demonstrated no regulatory properties despite producing abundant IL-10. Adoptive transfer of IL-9(+)IL-10(+) T cells into recombination-activating gene 1-deficient mice induced colitis and peripheral neuritis, the severity of which was aggravated if the IL-9(+)IL-10(+) T cells were transferred with CD45RB(hi) CD4(+) effector T cells. Thus IL-9(+)IL-10(+) T cells lack suppressive function and constitute a distinct population of helper-effector T cells that promote tissue inflammation.
转录因子Foxp3对于调节性T细胞(Treg细胞)的产生至关重要。转化生长因子-β(TGF-β)可诱导初始T细胞产生Foxp3和抑制性Treg细胞,而白细胞介素6(IL-6)则抑制诱导性Treg细胞的产生。在此,我们发现IL-4可阻断TGF-β诱导的Foxp3+ Treg细胞的产生,转而诱导一群产生IL-9和IL-10的辅助性T细胞。尽管IL-9+IL-10+ T细胞产生大量IL-10,但并未表现出调节特性。将IL-9+IL-10+ T细胞过继转移至重组激活基因1缺陷小鼠可诱发结肠炎和周围神经炎,若将IL-9+IL-10+ T细胞与CD45RBhi CD4+效应性T细胞一同转移,则病情会加重。因此,IL-9+IL-10+ T细胞缺乏抑制功能,构成了促进组织炎症的独特辅助效应性T细胞群体。