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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-?1, 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.

SUBMITTER: Kim SV

PROVIDER: S-EPMC3762262 | biostudies-literature | 2013 Jun

REPOSITORIES: biostudies-literature

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GPR15-mediated homing controls immune homeostasis in the large intestine mucosa.

Kim Sangwon V SV Xiang Wenkai V WV Kwak Changsoo C Yang Yi Y Lin Xiyao W XW Ota Mitsuhiko M Sarpel Umut U Rifkin Daniel B DB Xu Ruliang R Littman Dan R DR

Science (New York, N.Y.) 20130509 6139

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 ...[more]

PMID: 23661644

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