Activated Mucosal-associated Invariant T Cells Have a Pathogenic Role in a Murine Model of Inflammatory Bowel DiseaseSummary

Background & Aims: Mucosal-associated invariant T (MAIT) cells are innate-like T cells restricted by major histocompatibility complex-related molecule 1 (MR1) and express a semi-invariant T cell receptor. Previously, we reported the activation status of circulating MAIT cells in patients wit...

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Autores principales:	Yusuke Yasutomi, Asako Chiba, Keiichi Haga, Goh Murayama, Ayako Makiyama, Taiga Kuga, Mamoru Watanabe, Ryuichi Okamoto, Akihito Nagahara, Takashi Nagaishi, Sachiko Miyake
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2022
Materias:	MAIT Cell Mucosal Immunity Inflammatory Bowel Disease Gut Integrity Diseases of the digestive system. Gastroenterology RC799-869
Acceso en línea:	https://doaj.org/article/5a5fdbd058f24ba1a8de703e5edfd09c
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spelling	oai:doaj.org-article:5a5fdbd058f24ba1a8de703e5edfd09c2021-11-14T04:34:16ZActivated Mucosal-associated Invariant T Cells Have a Pathogenic Role in a Murine Model of Inflammatory Bowel DiseaseSummary2352-345X10.1016/j.jcmgh.2021.08.018https://doaj.org/article/5a5fdbd058f24ba1a8de703e5edfd09c2022-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2352345X21001855https://doaj.org/toc/2352-345XBackground & Aims: Mucosal-associated invariant T (MAIT) cells are innate-like T cells restricted by major histocompatibility complex-related molecule 1 (MR1) and express a semi-invariant T cell receptor. Previously, we reported the activation status of circulating MAIT cells in patients with ulcerative colitis (UC) was associated with disease activity and that these cells had infiltrated the inflamed colonic mucosa. These findings suggest MAIT cells are involved in the pathogenesis of inflammatory bowel disease. We investigated the role of MAIT cells in the pathogenesis of colitis by using MR1−/− mice lacking MAIT cells and a synthetic antagonistic MR1 ligand. Methods: Oxazolone colitis was induced in MR1−/− mice (C57BL/6 background), their littermate wild-type controls, and C57BL/6 mice orally administered an antagonistic MR1 ligand, isobutyl 6-formyl pterin (i6-FP). Cytokine production of splenocytes and colonic lamina propria lymphocytes from mice receiving i6-FP was analyzed. Intestinal permeability was assessed in MR1−/− and i6-FP-treated mice and their controls. The effect of i6-FP on cytokine production by MAIT cells from patients with UC was assessed. Results: MR1 deficiency or i6-FP treatment reduced the severity of oxazolone colitis. i6-FP treatment reduced cytokine production in MAIT cells from mice and patients with UC. Although MR1 deficiency increased the intestinal permeability, i6-FP administration did not affect gut integrity in mice. Conclusions: These results indicate MAIT cells have a pathogenic role in colitis and suppression of MAIT cell activation might reduce the severity of colitis without affecting gut integrity. Thus, MAIT cells are potential therapeutic targets for inflammatory bowel disease including UC.Yusuke YasutomiAsako ChibaKeiichi HagaGoh MurayamaAyako MakiyamaTaiga KugaMamoru WatanabeRyuichi OkamotoAkihito NagaharaTakashi NagaishiSachiko MiyakeElsevierarticleMAIT CellMucosal ImmunityInflammatory Bowel DiseaseGut IntegrityDiseases of the digestive system. GastroenterologyRC799-869ENCellular and Molecular Gastroenterology and Hepatology, Vol 13, Iss 1, Pp 81-93 (2022)
institution	DOAJ
collection	DOAJ
language	EN
topic	MAIT Cell Mucosal Immunity Inflammatory Bowel Disease Gut Integrity Diseases of the digestive system. Gastroenterology RC799-869
spellingShingle	MAIT Cell Mucosal Immunity Inflammatory Bowel Disease Gut Integrity Diseases of the digestive system. Gastroenterology RC799-869 Yusuke Yasutomi Asako Chiba Keiichi Haga Goh Murayama Ayako Makiyama Taiga Kuga Mamoru Watanabe Ryuichi Okamoto Akihito Nagahara Takashi Nagaishi Sachiko Miyake Activated Mucosal-associated Invariant T Cells Have a Pathogenic Role in a Murine Model of Inflammatory Bowel DiseaseSummary
description	Background & Aims: Mucosal-associated invariant T (MAIT) cells are innate-like T cells restricted by major histocompatibility complex-related molecule 1 (MR1) and express a semi-invariant T cell receptor. Previously, we reported the activation status of circulating MAIT cells in patients with ulcerative colitis (UC) was associated with disease activity and that these cells had infiltrated the inflamed colonic mucosa. These findings suggest MAIT cells are involved in the pathogenesis of inflammatory bowel disease. We investigated the role of MAIT cells in the pathogenesis of colitis by using MR1−/− mice lacking MAIT cells and a synthetic antagonistic MR1 ligand. Methods: Oxazolone colitis was induced in MR1−/− mice (C57BL/6 background), their littermate wild-type controls, and C57BL/6 mice orally administered an antagonistic MR1 ligand, isobutyl 6-formyl pterin (i6-FP). Cytokine production of splenocytes and colonic lamina propria lymphocytes from mice receiving i6-FP was analyzed. Intestinal permeability was assessed in MR1−/− and i6-FP-treated mice and their controls. The effect of i6-FP on cytokine production by MAIT cells from patients with UC was assessed. Results: MR1 deficiency or i6-FP treatment reduced the severity of oxazolone colitis. i6-FP treatment reduced cytokine production in MAIT cells from mice and patients with UC. Although MR1 deficiency increased the intestinal permeability, i6-FP administration did not affect gut integrity in mice. Conclusions: These results indicate MAIT cells have a pathogenic role in colitis and suppression of MAIT cell activation might reduce the severity of colitis without affecting gut integrity. Thus, MAIT cells are potential therapeutic targets for inflammatory bowel disease including UC.
format	article
author	Yusuke Yasutomi Asako Chiba Keiichi Haga Goh Murayama Ayako Makiyama Taiga Kuga Mamoru Watanabe Ryuichi Okamoto Akihito Nagahara Takashi Nagaishi Sachiko Miyake
author_facet	Yusuke Yasutomi Asako Chiba Keiichi Haga Goh Murayama Ayako Makiyama Taiga Kuga Mamoru Watanabe Ryuichi Okamoto Akihito Nagahara Takashi Nagaishi Sachiko Miyake
author_sort	Yusuke Yasutomi
title	Activated Mucosal-associated Invariant T Cells Have a Pathogenic Role in a Murine Model of Inflammatory Bowel DiseaseSummary
title_short	Activated Mucosal-associated Invariant T Cells Have a Pathogenic Role in a Murine Model of Inflammatory Bowel DiseaseSummary
title_full	Activated Mucosal-associated Invariant T Cells Have a Pathogenic Role in a Murine Model of Inflammatory Bowel DiseaseSummary
title_fullStr	Activated Mucosal-associated Invariant T Cells Have a Pathogenic Role in a Murine Model of Inflammatory Bowel DiseaseSummary
title_full_unstemmed	Activated Mucosal-associated Invariant T Cells Have a Pathogenic Role in a Murine Model of Inflammatory Bowel DiseaseSummary
title_sort	activated mucosal-associated invariant t cells have a pathogenic role in a murine model of inflammatory bowel diseasesummary
publisher	Elsevier
publishDate	2022
url	https://doaj.org/article/5a5fdbd058f24ba1a8de703e5edfd09c
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Activated Mucosal-associated Invariant T Cells Have a Pathogenic Role in a Murine Model of Inflammatory Bowel DiseaseSummary

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