Induction of Colonic Regulatory T Cells by Indigenous Clostridium Species
Koji Atarashi,Takeshi Tanoue,Tatsuichiro Shima,Akemi Imaoka,Tomomi Kuwahara,Yoshika Momose,Genhong Cheng,Sho Yamasaki,Takashi Saito,Yusuke Ohba,Tadatsugu Taniguchi,Kiyoshi Takeda,Shohei Hori,Ivaylo I. Ivanov,Yoshinori Umesaki,Kikuji Itoh,Kenya Honda,Kenya Honda +17 more
TLDR
Oral inoculation of Clostridium during the early life of conventionally reared mice resulted in resistance to colitis and systemic immunoglobulin E responses in adult mice, suggesting a new therapeutic approach to autoimmunity and allergy.Abstract:
CD4+ T regulatory cells (Tregs), which express the Foxp3 transcription factor, play a critical role in the maintenance of immune homeostasis. Here, we show that in mice, Tregs were most abundant in the colonic mucosa. The spore-forming component of indigenous intestinal microbiota, particularly clusters IV and XIVa of the genus Clostridium, promoted Treg cell accumulation. Colonization of mice by a defined mix of Clostridium strains provided an environment rich in transforming growth factor–β and affected Foxp3+ Treg number and function in the colon. Oral inoculation of Clostridium during the early life of conventionally reared mice resulted in resistance to colitis and systemic immunoglobulin E responses in adult mice, suggesting a new therapeutic approach to autoimmunity and allergy.read more
Citations
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The Microbial Metabolites, Short-Chain Fatty Acids, Regulate Colonic Treg Cell Homeostasis
Patrick M. Smith,Michael R. Howitt,Nicolai Panikov,Monia Michaud,Carey Ann Gallini,Mohammad Bohlooly-Y,Jonathan N. Glickman,Wendy S. Garrett +7 more
TL;DR: This study determined that short-chain fatty acids, gut microbiota–derived bacterial fermentation products, regulate the size and function of the colonic Treg pool and protect against colitis in a Ffar2-dependent manner in mice, revealing that a class of abundant microbial metabolites underlies adaptive immune microbiota coadaptation and promotes colonic homeostasis and health.
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Commensal microbe-derived butyrate induces the differentiation of colonic regulatory T cells
Yukihiro Furusawa,Yuuki Obata,Shinji Fukuda,Takaho A. Endo,Gaku Nakato,Daisuke Takahashi,Yumiko Nakanishi,Chikako Uetake,Keiko Kato,Tamotsu Kato,Masumi Takahashi,Noriko N. Fukuda,Shinnosuke Murakami,Eiji Miyauchi,Shingo Hino,Koji Atarashi,Satoshi Onawa,Yumiko Fujimura,Trevor Lockett,Julie M. Clarke,David L. Topping,Masaru Tomita,Shohei Hori,Osamu Ohara,Tatsuya Morita,Haruhiko Koseki,Jun Kikuchi,Kenya Honda,Koji Hase,Hiroshi Ohno +29 more
TL;DR: It is shown that a large bowel microbial fermentation product, butyrate, induces the differentiation of colonic Treg cells in mice and ameliorated the development of colitis induced by adoptive transfer of CD4+ CD45RBhi T cells in Rag1−/− mice.
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Interactions between the microbiota and the immune system.
TL;DR: Advances in understanding of the interactions between resident microbes and the immune system are reviewed and the implications for human health are reviewed.
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Role of the Microbiota in Immunity and Inflammation
Yasmine Belkaid,Timothy W. Hand +1 more
TL;DR: In high-income countries, overuse of antibiotics, changes in diet, and elimination of constitutive partners, such as nematodes, may have selected for a microbiota that lack the resilience and diversity required to establish balanced immune responses.
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Metabolites produced by commensal bacteria promote peripheral regulatory T-cell generation
Nicholas Arpaia,Clarissa Campbell,Xiying Fan,Stanislav Dikiy,Joris van der Veeken,Paul deRoos,Hui Liu,Justin R. Cross,Klaus Pfeffer,Paul J. Coffer,Alexander Y. Rudensky +10 more
TL;DR: The results suggest that bacterial metabolites mediate communication between the commensal microbiota and the immune system, affecting the balance between pro- and anti-inflammatory mechanisms.
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