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  • 1
    Publication Date: 2011-01-06
    Description: CD4(+) T regulatory cells (T(regs)), which express the Foxp3 transcription factor, play a critical role in the maintenance of immune homeostasis. Here, we show that in mice, T(regs) 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 T(reg) cell accumulation. Colonization of mice by a defined mix of Clostridium strains provided an environment rich in transforming growth factor-beta and affected Foxp3(+) T(reg) 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.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3969237/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3969237/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Atarashi, Koji -- Tanoue, Takeshi -- Shima, Tatsuichiro -- Imaoka, Akemi -- Kuwahara, Tomomi -- Momose, Yoshika -- Cheng, Genhong -- Yamasaki, Sho -- Saito, Takashi -- Ohba, Yusuke -- Taniguchi, Tadatsugu -- Takeda, Kiyoshi -- Hori, Shohei -- Ivanov, Ivaylo I -- Umesaki, Yoshinori -- Itoh, Kikuji -- Honda, Kenya -- R00 DK085329/DK/NIDDK NIH HHS/ -- R01 AI052359/AI/NIAID NIH HHS/ -- R01 AI056154/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2011 Jan 21;331(6015):337-41. doi: 10.1126/science.1198469. Epub 2010 Dec 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology, Graduate School of Medicine, University of Tokyo, Tokyo 113-0033, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21205640" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anti-Bacterial Agents/pharmacology ; Cecum/microbiology ; Cells, Cultured ; Clostridium/growth & development/*immunology ; Colitis/immunology/pathology/prevention & control ; Colon/*immunology/metabolism/*microbiology ; Feces/microbiology ; Forkhead Transcription Factors/metabolism ; Germ-Free Life ; Immunity, Innate ; Immunoglobulin E/biosynthesis ; Interleukin-10/immunology/metabolism ; Intestinal Mucosa/*immunology/metabolism ; Intestine, Small/immunology ; Metagenome ; Mice ; Mice, Inbred A ; Mice, Inbred BALB C ; Receptors, Pattern Recognition/physiology ; Specific Pathogen-Free Organisms ; T-Lymphocytes, Helper-Inducer/immunology ; T-Lymphocytes, Regulatory/*immunology/metabolism ; Transforming Growth Factor beta/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2013-11-15
    Description: Gut commensal microbes shape the mucosal immune system by regulating the differentiation and expansion of several types of T cell. Clostridia, a dominant class of commensal microbe, can induce colonic regulatory T (Treg) cells, which have a central role in the suppression of inflammatory and allergic responses. However, the molecular mechanisms by which commensal microbes induce colonic Treg cells have been unclear. Here we show that a large bowel microbial fermentation product, butyrate, induces the differentiation of colonic Treg cells in mice. A comparative NMR-based metabolome analysis suggests that the luminal concentrations of short-chain fatty acids positively correlates with the number of Treg cells in the colon. Among short-chain fatty acids, butyrate induced the differentiation of Treg cells in vitro and in vivo, and ameliorated the development of colitis induced by adoptive transfer of CD4(+) CD45RB(hi) T cells in Rag1(-/-) mice. Treatment of naive T cells under the Treg-cell-polarizing conditions with butyrate enhanced histone H3 acetylation in the promoter and conserved non-coding sequence regions of the Foxp3 locus, suggesting a possible mechanism for how microbial-derived butyrate regulates the differentiation of Treg cells. Our findings provide new insight into the mechanisms by which host-microbe interactions establish immunological homeostasis in the gut.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Furusawa, Yukihiro -- Obata, Yuuki -- Fukuda, Shinji -- Endo, Takaho A -- Nakato, Gaku -- Takahashi, Daisuke -- Nakanishi, Yumiko -- Uetake, Chikako -- Kato, Keiko -- Kato, Tamotsu -- Takahashi, Masumi -- Fukuda, Noriko N -- Murakami, Shinnosuke -- Miyauchi, Eiji -- Hino, Shingo -- Atarashi, Koji -- Onawa, Satoshi -- Fujimura, Yumiko -- Lockett, Trevor -- Clarke, Julie M -- Topping, David L -- Tomita, Masaru -- Hori, Shohei -- Ohara, Osamu -- Morita, Tatsuya -- Koseki, Haruhiko -- Kikuchi, Jun -- Honda, Kenya -- Hase, Koji -- Ohno, Hiroshi -- England -- Nature. 2013 Dec 19;504(7480):446-50. doi: 10.1038/nature12721. Epub 2013 Nov 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan [3]. ; 1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan [3] Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan [4]. ; 1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] Institute for Advanced Biosciences, Keio University, Yamagata 997-0052, Japan [3]. ; RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan. ; Institute for Advanced Biosciences, Keio University, Yamagata 997-0052, Japan. ; 1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] Graduate School of Medical Life Science, Yokohama City University, Kanagawa 230-0045, Japan. ; Faculty of Agriculture, Shizuoka University, Shizuoka 422-8529, Japan. ; 1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] PRESTO, Japan Science and Technology Agency, Saitama 332-0012, Japan. ; The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan. ; Preventative Health National Research Flagship, CSIRO Food and Nutritional Sciences, South Australia 5000, Australia. ; 1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan [3] Graduate School of Medical Life Science, Yokohama City University, Kanagawa 230-0045, Japan. ; 1] Graduate School of Medical Life Science, Yokohama City University, Kanagawa 230-0045, Japan [2] RIKEN Center for Sustainable Resource Science, Kanagawa 230-0045, Japan. ; 1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] CREST, Japan Science and Technology Agency, Saitama 332-0012, Japan. ; 1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan [3] PRESTO, Japan Science and Technology Agency, Saitama 332-0012, Japan [4].〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24226770" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylation/drug effects ; Adoptive Transfer ; Animals ; Butyrates/analysis/*metabolism/pharmacology ; *Cell Differentiation/drug effects ; Colitis/drug therapy/pathology ; Colon/cytology/*immunology/metabolism/*microbiology ; Conserved Sequence ; Female ; *Fermentation ; Forkhead Transcription Factors/genetics ; Germ-Free Life ; Histones/metabolism ; Homeostasis/drug effects ; Intestinal Mucosa/cytology/immunology ; Lymphocyte Count ; Magnetic Resonance Spectroscopy ; Male ; Metabolome ; Mice ; Promoter Regions, Genetic/drug effects ; *Symbiosis ; T-Lymphocytes, Regulatory/*cytology/drug effects/immunology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 2013-06-28
    Description: Obesity has become more prevalent in most developed countries over the past few decades, and is increasingly recognized as a major risk factor for several common types of cancer. As the worldwide obesity epidemic has shown no signs of abating, better understanding of the mechanisms underlying obesity-associated cancer is urgently needed. Although several events were proposed to be involved in obesity-associated cancer, the exact molecular mechanisms that integrate these events have remained largely unclear. Here we show that senescence-associated secretory phenotype (SASP) has crucial roles in promoting obesity-associated hepatocellular carcinoma (HCC) development in mice. Dietary or genetic obesity induces alterations of gut microbiota, thereby increasing the levels of deoxycholic acid (DCA), a gut bacterial metabolite known to cause DNA damage. The enterohepatic circulation of DCA provokes SASP phenotype in hepatic stellate cells (HSCs), which in turn secretes various inflammatory and tumour-promoting factors in the liver, thus facilitating HCC development in mice after exposure to chemical carcinogen. Notably, blocking DCA production or reducing gut bacteria efficiently prevents HCC development in obese mice. Similar results were also observed in mice lacking an SASP inducer or depleted of senescent HSCs, indicating that the DCA-SASP axis in HSCs has key roles in obesity-associated HCC development. Moreover, signs of SASP were also observed in the HSCs in the area of HCC arising in patients with non-alcoholic steatohepatitis, indicating that a similar pathway may contribute to at least certain aspects of obesity-associated HCC development in humans as well. These findings provide valuable new insights into the development of obesity-associated cancer and open up new possibilities for its control.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yoshimoto, Shin -- Loo, Tze Mun -- Atarashi, Koji -- Kanda, Hiroaki -- Sato, Seidai -- Oyadomari, Seiichi -- Iwakura, Yoichiro -- Oshima, Kenshiro -- Morita, Hidetoshi -- Hattori, Masahira -- Honda, Kenya -- Ishikawa, Yuichi -- Hara, Eiji -- Ohtani, Naoko -- England -- Nature. 2013 Jul 4;499(7456):97-101. doi: 10.1038/nature12347. Epub 2013 Jun 26.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Cancer Biology, Cancer Institute, Japanese Foundation for Cancer Research, Koto-ku, Tokyo 135-8550, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23803760" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anti-Bacterial Agents/pharmacology ; Bacteria/metabolism ; Bile Acids and Salts/metabolism ; Carcinoma, Hepatocellular/complications/etiology/metabolism/prevention & control ; *Cell Aging/drug effects ; Cells, Cultured ; Cytokines/metabolism/secretion ; DNA Damage/drug effects ; Deoxycholic Acid/blood/*metabolism ; Dietary Fats/adverse effects/pharmacology ; Disease Models, Animal ; Fatty Liver/complications/pathology ; Gastrointestinal Tract/drug effects/*metabolism/*microbiology ; Hepatic Stellate Cells/cytology/drug effects/metabolism/*secretion ; Humans ; Interleukin-1beta/deficiency ; Liver Neoplasms/complications/etiology/*metabolism/prevention & control ; Male ; Mice ; Mice, Inbred C57BL ; Non-alcoholic Fatty Liver Disease ; Obesity/chemically induced/*metabolism ; Phenotype ; Risk Factors
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 4
    Publication Date: 2013-07-12
    Description: Manipulation of the gut microbiota holds great promise for the treatment of inflammatory and allergic diseases. Although numerous probiotic microorganisms have been identified, there remains a compelling need to discover organisms that elicit more robust therapeutic responses, are compatible with the host, and can affect a specific arm of the host immune system in a well-controlled, physiological manner. Here we use a rational approach to isolate CD4(+)FOXP3(+) regulatory T (Treg)-cell-inducing bacterial strains from the human indigenous microbiota. Starting with a healthy human faecal sample, a sequence of selection steps was applied to obtain mice colonized with human microbiota enriched in Treg-cell-inducing species. From these mice, we isolated and selected 17 strains of bacteria on the basis of their high potency in enhancing Treg cell abundance and inducing important anti-inflammatory molecules--including interleukin-10 (IL-) and inducible T-cell co-stimulator (ICOS)--in Treg cells upon inoculation into germ-free mice. Genome sequencing revealed that the 17 strains fall within clusters IV, XIVa and XVIII of Clostridia, which lack prominent toxins and virulence factors. The 17 strains act as a community to provide bacterial antigens and a TGF-beta-rich environment to help expansion and differentiation of Treg cells. Oral administration of the combination of 17 strains to adult mice attenuated disease in models of colitis and allergic diarrhoea. Use of the isolated strains may allow for tailored therapeutic manipulation of human immune disorders.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Atarashi, Koji -- Tanoue, Takeshi -- Oshima, Kenshiro -- Suda, Wataru -- Nagano, Yuji -- Nishikawa, Hiroyoshi -- Fukuda, Shinji -- Saito, Takuro -- Narushima, Seiko -- Hase, Koji -- Kim, Sangwan -- Fritz, Joelle V -- Wilmes, Paul -- Ueha, Satoshi -- Matsushima, Kouji -- Ohno, Hiroshi -- Olle, Bernat -- Sakaguchi, Shimon -- Taniguchi, Tadatsugu -- Morita, Hidetoshi -- Hattori, Masahira -- Honda, Kenya -- England -- Nature. 2013 Aug 8;500(7461):232-6. doi: 10.1038/nature12331. Epub 2013 Jul 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉RIKEN Center for Integrative Medical Sciences (IMS-RCAI), 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23842501" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Animals ; Cell Proliferation ; Clostridium/classification/genetics/*immunology ; Colitis/microbiology/pathology ; Colon/immunology/microbiology ; Disease Models, Animal ; Feces/microbiology ; Germ-Free Life ; Humans ; Inducible T-Cell Co-Stimulator Protein/metabolism ; Interleukin-10/metabolism ; Male ; Metagenome/genetics/*immunology ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Mice, SCID ; RNA, Ribosomal, 16S/genetics ; Rats ; Rats, Inbred F344 ; T-Lymphocytes, Regulatory/cytology/*physiology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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