title: GPR15-mediated homing controls immune homeostasis in the large intestine mucosa.
abstract: Lymphocyte homing, which contributes to inflammation, has been studied extensively in the small intestine, but there is little known about homing to the large intestine, the site most commonly affected in inflammatory bowel disease. GPR15, an orphan heterotrimeric guanine nucleotide-binding protein (G protein)-coupled receptor, controlled the specific homing of T cells, particularly FOXP3(+) regulatory T cells (Tregs), to the large intestine lamina propria (LILP). GPR15 expression was modulated by gut microbiota and transforming growth factor-β1, but not by retinoic acid. GPR15-deficient mice were prone to develop more severe large intestine inflammation, which was rescued by the transfer of GPR15-sufficient Tregs. Our findings thus describe a T cell-homing receptor for LILP and indicate that GPR15 plays a role in mucosal immune tolerance largely by regulating the influx of Tregs.
authors: Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY 10016, USA.
authors: Sangwon V
authors: SV
authors: Kim
authors: Wenkai V
authors: WV
authors: Xiang
authors: Changsoo
authors: C
authors: Kwak
authors: Yi
authors: Y
authors: Yang
authors: Xiyao W
authors: XW
authors: Lin
authors: Mitsuhiko
authors: M
authors: Ota
authors: Umut
authors: U
authors: Sarpel
authors: Daniel B
authors: DB
authors: Rifkin
authors: Ruliang
authors: R
authors: Xu
authors: Dan R
authors: DR
authors: Littman
mesh_terms: D000818:Animals; D044082:Citrobacter rodentium; D003092:Colitis / Q000276:immunology; D003106:Colon / Q000276:immunology; D004756:Enterobacteriaceae Infections / Q000276:immunology; D016481:Helicobacter Infections / Q000276:immunology; D006706:Homeostasis; D006801:Humans; D007108:Immune Tolerance; D007413:Intestinal Mucosa / Q000276:immunology*; D007420:Intestine, Large / Q000276:immunology* / Q000382:microbiology; D007421:Intestine, Small / Q000276:immunology; D054892:Metagenome / Q000502:physiology; D051379:Mice; D018345:Mice, Knockout; D008822:Mice, Transgenic; D043562:Receptors, G-Protein-Coupled / Q000235:genetics / Q000378:metabolism*; D016201:Receptors, Lymphocyte Homing / Q000378:metabolism*; D018000:Receptors, Peptide / Q000235:genetics / Q000378:metabolism*; D050378:T-Lymphocytes, Regulatory / Q000276:immunology* / Q000378:metabolism*
chemical_list: C103539:GPR15 protein, human; C523001:Gpr15 protein, mouse; D043562:Receptors, G-Protein-Coupled; D016201:Receptors, Lymphocyte Homing; D018000:Receptors, Peptide
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