PMID- 21336274 OWN - NLM STAT- MEDLINE DCOM- 20110606 LR - 20231213 IS - 1529-2916 (Electronic) IS - 1529-2908 (Linking) VI - 12 IP - 4 DP - 2011 Apr TI - RORgammat+ innate lymphoid cells regulate intestinal homeostasis by integrating negative signals from the symbiotic microbiota. PG - 320-6 LID - 10.1038/ni.2002 [doi] AB - Lymphoid cells that express the nuclear hormone receptor RORgammat are involved in containment of the large intestinal microbiota and defense against pathogens through the production of interleukin 17 (IL-17) and IL-22. They include adaptive IL-17-producing helper T cells (T(H)17 cells), as well as innate lymphoid cells (ILCs) such as lymphoid tissue-inducer (LTi) cells and IL-22-producing NKp46+ cells. Here we show that in contrast to T(H)17 cells, both types of RORgammat+ ILCs constitutively produced most of the intestinal IL-22 and that the symbiotic microbiota repressed this function through epithelial expression of IL-25. This function was greater in the absence of adaptive immunity and was fully restored and required after epithelial damage, which demonstrates a central role for RORgammat+ ILCs in intestinal homeostasis. Our data identify a finely tuned equilibrium among intestinal symbionts, adaptive immunity and RORgammat+ ILCs. FAU - Sawa, Shinichiro AU - Sawa S AD - Institut Pasteur, Lymphoid Tissue Development Unit, Paris, France. FAU - Lochner, Matthias AU - Lochner M FAU - Satoh-Takayama, Naoko AU - Satoh-Takayama N FAU - Dulauroy, Sophie AU - Dulauroy S FAU - Berard, Marion AU - Berard M FAU - Kleinschek, Melanie AU - Kleinschek M FAU - Cua, Daniel AU - Cua D FAU - Di Santo, James P AU - Di Santo JP FAU - Eberl, Gerard AU - Eberl G LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20110220 PL - United States TA - Nat Immunol JT - Nature immunology JID - 100941354 RN - 0 (Antigens, Ly) RN - 0 (Interleukin-17) RN - 0 (Interleukins) RN - 0 (Mydgf protein, mouse) RN - 0 (Natural Cytotoxicity Triggering Receptor 1) RN - 0 (Ncr1 protein, mouse) RN - 0 (Nuclear Receptor Subfamily 1, Group F, Member 3) SB - IM MH - Adaptive Immunity/immunology MH - Animals MH - Antigens, Ly/genetics/metabolism MH - Female MH - Flow Cytometry MH - Homeostasis/immunology MH - Humans MH - Interleukin-17/genetics/metabolism MH - Interleukins/genetics/metabolism MH - Intestinal Mucosa/metabolism MH - Intestines/*immunology/microbiology MH - Lymphoid Tissue/cytology/*immunology/metabolism MH - Male MH - Mice MH - Mice, Knockout MH - Mice, Transgenic MH - Natural Cytotoxicity Triggering Receptor 1/genetics/metabolism MH - Nuclear Receptor Subfamily 1, Group F, Member 3/genetics/*metabolism MH - Reverse Transcriptase Polymerase Chain Reaction MH - Signal Transduction/*immunology MH - Symbiosis/immunology MH - Time Factors MH - Interleukin-22 EDAT- 2011/02/22 06:00 MHDA- 2011/06/07 06:00 CRDT- 2011/02/22 06:00 PHST- 2010/08/27 00:00 [received] PHST- 2011/02/01 00:00 [accepted] PHST- 2011/02/22 06:00 [entrez] PHST- 2011/02/22 06:00 [pubmed] PHST- 2011/06/07 06:00 [medline] AID - ni.2002 [pii] AID - 10.1038/ni.2002 [doi] PST - ppublish SO - Nat Immunol. 2011 Apr;12(4):320-6. doi: 10.1038/ni.2002. Epub 2011 Feb 20.