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  • 1
    Publication Date: 2015-01-21
    Description: The gut microbiota plays a crucial role in the maturation of the intestinal mucosal immune system of its host. Within the thousand bacterial species present in the intestine, the symbiont segmented filamentous bacterium (SFB) is unique in its ability to potently stimulate the post-natal maturation of the B- and T-cell compartments and induce a striking increase in the small-intestinal Th17 responses. Unlike other commensals, SFB intimately attaches to absorptive epithelial cells in the ileum and cells overlying Peyer's patches. This colonization does not result in pathology; rather, it protects the host from pathogens. Yet, little is known about the SFB-host interaction that underlies the important immunostimulatory properties of SFB, because SFB have resisted in vitro culturing for more than 50 years. Here we grow mouse SFB outside their host in an SFB-host cell co-culturing system. Single-celled SFB isolated from monocolonized mice undergo filamentation, segmentation, and differentiation to release viable infectious particles, the intracellular offspring, which can colonize mice to induce signature immune responses. In vitro, intracellular offspring can attach to mouse and human host cells and recruit actin. In addition, SFB can potently stimulate the upregulation of host innate defence genes, inflammatory cytokines, and chemokines. In vitro culturing thereby mimics the in vivo niche, provides new insights into SFB growth requirements and their immunostimulatory potential, and makes possible the investigation of the complex developmental stages of SFB and the detailed dissection of the unique SFB-host interaction at the cellular and molecular levels.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schnupf, Pamela -- Gaboriau-Routhiau, Valerie -- Gros, Marine -- Friedman, Robin -- Moya-Nilges, Maryse -- Nigro, Giulia -- Cerf-Bensussan, Nadine -- Sansonetti, Philippe J -- Howard Hughes Medical Institute/ -- England -- Nature. 2015 Apr 2;520(7545):99-103. doi: 10.1038/nature14027. Epub 2015 Jan 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Unite de Pathogenie Microbienne Moleculaire and Institut national de la sante et de la recherche medicale (INSERM) unit U786, Institut Pasteur, 25-28 Rue du Dr Roux, 75724 Paris Cedex 15, France [2] INSERM, UMR1163, Laboratory of Intestinal Immunity, Institut Imagine, 24, Boulevard du Montparnasse, 75015 Paris, France. ; 1] INSERM, UMR1163, Laboratory of Intestinal Immunity, Institut Imagine, 24, Boulevard du Montparnasse, 75015 Paris, France [2] Institut national de la recherche agronomique (INRA) Micalis UMR1319, 78350 Jouy-en-Josas, France [3] Universite Paris Descartes-Sorbonne Paris Cite and Institut Imagine, 75015 Paris, France. ; 1] Universite Paris Descartes-Sorbonne Paris Cite and Institut Imagine, 75015 Paris, France [2] Ecole Normale Superieure de Lyon, Department of Biology, 69007 Lyon, France. ; Unite de Pathogenie Microbienne Moleculaire and Institut national de la sante et de la recherche medicale (INSERM) unit U786, Institut Pasteur, 25-28 Rue du Dr Roux, 75724 Paris Cedex 15, France. ; Imagopole, Ultrastructural Microscopy Platform, Institut Pasteur, 25-28 Rue du Dr Roux, 75724 Paris Cedex 15, France. ; 1] INSERM, UMR1163, Laboratory of Intestinal Immunity, Institut Imagine, 24, Boulevard du Montparnasse, 75015 Paris, France [2] Universite Paris Descartes-Sorbonne Paris Cite and Institut Imagine, 75015 Paris, France. ; 1] Unite de Pathogenie Microbienne Moleculaire and Institut national de la sante et de la recherche medicale (INSERM) unit U786, Institut Pasteur, 25-28 Rue du Dr Roux, 75724 Paris Cedex 15, France [2] Microbiologie et Maladies Infectieuses, College de France, 11 Marcelin Berthelot Square, 75005 Paris, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25600271" target="_blank"〉PubMed〈/a〉
    Keywords: Actins/metabolism ; Animals ; Bacteria/cytology/*growth & development/*immunology ; Cell Line ; Coculture Techniques/*methods ; Escherichia coli/cytology/growth & development/immunology ; Feces/microbiology ; Female ; Germ-Free Life ; Humans ; Immunity, Mucosal/immunology ; Intestinal Mucosa/cytology/immunology/microbiology ; Intestines/cytology/*immunology/*microbiology ; Lymphocytes/cytology/*immunology ; Male ; Mice ; Microbial Viability ; Peyer's Patches/immunology ; Symbiosis/*immunology ; Th17 Cells/immunology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2013-11-23
    Description: Cyclophosphamide is one of several clinically important cancer drugs whose therapeutic efficacy is due in part to their ability to stimulate antitumor immune responses. Studying mouse models, we demonstrate that cyclophosphamide alters the composition of microbiota in the small intestine and induces the translocation of selected species of Gram-positive bacteria into secondary lymphoid organs. There, these bacteria stimulate the generation of a specific subset of "pathogenic" T helper 17 (pT(H)17) cells and memory T(H)1 immune responses. Tumor-bearing mice that were germ-free or that had been treated with antibiotics to kill Gram-positive bacteria showed a reduction in pT(H)17 responses, and their tumors were resistant to cyclophosphamide. Adoptive transfer of pT(H)17 cells partially restored the antitumor efficacy of cyclophosphamide. These results suggest that the gut microbiota help shape the anticancer immune response.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4048947/" 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/PMC4048947/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Viaud, Sophie -- Saccheri, Fabiana -- Mignot, Gregoire -- Yamazaki, Takahiro -- Daillere, Romain -- Hannani, Dalil -- Enot, David P -- Pfirschke, Christina -- Engblom, Camilla -- Pittet, Mikael J -- Schlitzer, Andreas -- Ginhoux, Florent -- Apetoh, Lionel -- Chachaty, Elisabeth -- Woerther, Paul-Louis -- Eberl, Gerard -- Berard, Marion -- Ecobichon, Chantal -- Clermont, Dominique -- Bizet, Chantal -- Gaboriau-Routhiau, Valerie -- Cerf-Bensussan, Nadine -- Opolon, Paule -- Yessaad, Nadia -- Vivier, Eric -- Ryffel, Bernhard -- Elson, Charles O -- Dore, Joel -- Kroemer, Guido -- Lepage, Patricia -- Boneca, Ivo Gomperts -- Ghiringhelli, Francois -- Zitvogel, Laurence -- P01 DK071176/DK/NIDDK NIH HHS/ -- P01DK071176/DK/NIDDK NIH HHS/ -- P50 CA086355/CA/NCI NIH HHS/ -- R01 AI084880/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2013 Nov 22;342(6161):971-6. doi: 10.1126/science.1240537.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut National de la Sante et de la Recherche Medicale, U1015, Equipe labellisee Ligue Nationale Contre le Cancer, Institut Gustave Roussy, Villejuif, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24264990" target="_blank"〉PubMed〈/a〉
    Keywords: Adoptive Transfer ; Animals ; Anti-Bacterial Agents/administration & dosage ; Antineoplastic Agents/*therapeutic use ; Bacterial Translocation/*drug effects ; Cyclophosphamide/*therapeutic use ; Germ-Free Life ; Gram-Positive Bacteria/drug effects/physiology ; Immunologic Memory ; Immunosuppressive Agents/*therapeutic use ; Intestine, Small/*microbiology ; Lymphoid Tissue/immunology/microbiology ; Mice ; Microbiota/drug effects/*physiology ; Neoplasms/*drug therapy/*immunology ; Th17 Cells/immunology/transplantation
    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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  • 3
    Publication Date: 2015-07-15
    Description: Changes to the symbiotic microbiota early in life, or the absence of it, can lead to exacerbated type 2 immunity and allergic inflammations. Although it is unclear how the microbiota regulates type 2 immunity, it is a strong inducer of proinflammatory T helper 17 (T(H)17) cells and regulatory T cells (T(regs)) in the intestine. Here, we report that microbiota-induced T(regs) express the nuclear hormone receptor RORgammat and differentiate along a pathway that also leads to T(H)17 cells. In the absence of RORgammat(+) T(regs), T(H)2-driven defense against helminths is more efficient, whereas T(H)2-associated pathology is exacerbated. Thus, the microbiota regulates type 2 responses through the induction of type 3 RORgammat(+) T(regs) and T(H)17 cells and acts as a key factor in balancing immune responses at mucosal surfaces.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ohnmacht, Caspar -- Park, Joo-Hong -- Cording, Sascha -- Wing, James B -- Atarashi, Koji -- Obata, Yuuki -- Gaboriau-Routhiau, Valerie -- Marques, Rute -- Dulauroy, Sophie -- Fedoseeva, Maria -- Busslinger, Meinrad -- Cerf-Bensussan, Nadine -- Boneca, Ivo G -- Voehringer, David -- Hase, Koji -- Honda, Kenya -- Sakaguchi, Shimon -- Eberl, Gerard -- New York, N.Y. -- Science. 2015 Aug 28;349(6251):989-93. doi: 10.1126/science.aac4263. Epub 2015 Jul 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut Pasteur, Microenvironment and Immunity Unit, 75724 Paris, France. ; Laboratory of Experimental Immunology, Immunology Frontier Research Center, Osaka University, Suita 565-0871, Japan. ; RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Yokohama, Kanagawa 230-0045, Japan. PRESTO, Japan Science and Technology Agency, Saitama 332-0012, Japan. ; The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan. ; INSERM, U1163, Laboratory of Intestinal Immunity, Paris, France. Universite Paris Descartes-Sorbonne Paris Cite and Institut Imagine, Paris, France. INRA Micalis UMR1319, Jouy-en-Josas, France. ; Center of Allergy and Environment (ZAUM), Technische Universitat and Helmholtz Zentrum Munchen, Munich, Germany. ; Research Institute of Molecular Pathology, Vienna Biocenter, 1030 Vienna, Austria. ; INSERM, U1163, Laboratory of Intestinal Immunity, Paris, France. Universite Paris Descartes-Sorbonne Paris Cite and Institut Imagine, Paris, France. ; Institut Pasteur, Biology and Genetics of Bacterial Cell Wall, 75724 Paris, France. INSERM, Groupe Avenir, 75015 Paris, France. ; Department of Infection Biology at the Institute of Clinical Microbiology, Immunology and Hygiene, University Clinic Erlangen and Friedrich-Alexander University Erlangen-Nuremberg, 91054 Erlangen, Germany. ; RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Yokohama, Kanagawa 230-0045, Japan. CREST, Japan Science and Technology Agency, 4-1-8 Honcho Kawaguchi, Saitama 332-0012, Japan. ; Laboratory of Experimental Immunology, Immunology Frontier Research Center, Osaka University, Suita 565-0871, Japan. Department of Experimental Pathology, Institute for Frontier Medical Sciences, Kyoto University, Kyoto 606-8507, Japan. ; Institut Pasteur, Microenvironment and Immunity Unit, 75724 Paris, France. gerard.eberl@pasteur.fr.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26160380" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Colitis, Ulcerative/immunology ; Colon/immunology/microbiology ; Germ-Free Life ; Homeostasis ; *Immunity, Mucosal ; Intestinal Mucosa/*immunology/*microbiology ; Intestine, Small/immunology/microbiology ; Intestines/immunology/*microbiology ; Mice ; Microbiota/*immunology ; Models, Immunological ; Nematospiroides dubius ; Nuclear Receptor Subfamily 1, Group F, Member 3/*metabolism ; Specific Pathogen-Free Organisms ; Strongylida Infections/immunology ; T-Lymphocyte Subsets/immunology ; T-Lymphocytes, Regulatory/*immunology/metabolism ; Th17 Cells/immunology ; Th2 Cells/immunology ; Vitamin A/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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  • 4
    ISSN: 0014-5793
    Keywords: HML-1 ; Integrin ; Protein structure ; β"7 subunit
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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