Molecular-phylogenetic characterization of microbial community imbalances in human inflammatory bowel diseases
Daniel N. Frank,Allison L. St. Amand,Robert A. Feldman,Edgar C. Boedeker,Noam Harpaz,Norman R. Pace +5 more
TLDR
Patient stratification by GI microbiota provides further evidence that CD represents a spectrum of disease states and suggests that treatment of some forms of IBD may be facilitated by redress of the detected microbiological imbalances.Abstract:
The two primary human inflammatory bowel diseases, Crohn's disease (CD) and ulcerative colitis (UC), are idiopathic relapsing disorders characterized by chronic inflammation of the intestinal tract. Although several lines of reasoning suggest that gastrointestinal (GI) microbes influence inflammatory bowel disease (IBD) pathogenesis, the types of microbes involved have not been adequately described. Here we report the results of a culture-independent rRNA sequence analysis of GI tissue samples obtained from CD and UC patients, as well as non-IBD controls. Specimens were obtained through surgery from a variety of intestinal sites and included both pathologically normal and abnormal states. Our results provide comprehensive molecular-based analysis of the microbiota of the human small intestine. Comparison of clone libraries reveals statistically significant differences between the microbiotas of CD and UC patients and those of non-IBD controls. Significantly, our results indicate that a subset of CD and UC samples contained abnormal GI microbiotas, characterized by depletion of commensal bacteria, notably members of the phyla Firmicutes and Bacteroidetes. Patient stratification by GI microbiota provides further evidence that CD represents a spectrum of disease states and suggests that treatment of some forms of IBD may be facilitated by redress of the detected microbiological imbalances.read more
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A core gut microbiome in obese and lean twins
Peter J. Turnbaugh,Micah Hamady,Tanya Yatsunenko,Brandi L. Cantarel,Alexis E. Duncan,Ruth E. Ley,Mitchell L. Sogin,William J. Jones,Bruce A. Roe,Jason P. Affourtit,Michael Egholm,Bernard Henrissat,Andrew C. Heath,Rob Knight,Jeffrey I. Gordon +14 more
TL;DR: The faecal microbial communities of adult female monozygotic and dizygotic twin pairs concordant for leanness or obesity, and their mothers are characterized to address how host genotype, environmental exposure and host adiposity influence the gut microbiome.
Journal ArticleDOI
The gut microbiota shapes intestinal immune responses during health and disease
TL;DR: Findings indicating that developmental aspects of the adaptive immune system are influenced by bacterial colonization of the gut are discussed, and the possibility that the mammalian immune system, which seems to be designed to control microorganisms, is in fact controlled by microorganisms is raised.
Journal ArticleDOI
Diversity, stability and resilience of the human gut microbiota
Catherine A. Lozupone,Jesse Stombaugh,Jeffrey I. Gordon,Janet K. Jansson,Rob Knight,Rob Knight +5 more
TL;DR: Viewing the microbiota from an ecological perspective could provide insight into how to promote health by targeting this microbial community in clinical treatments.
Journal ArticleDOI
Faecalibacterium prausnitzii is an anti-inflammatory commensal bacterium identified by gut microbiota analysis of Crohn disease patients
Harry Sokol,Bénédicte Pigneur,Laurie Watterlot,Omar Lakhdari,Luis G. Bermúdez-Humarán,Jean-Jacques Gratadoux,Sébastien Blugeon,Chantal Bridonneau,Jean-Pierre Furet,Gérard Corthier,Corinne Grangette,Nadia Vasquez,Philippe Pochart,Germain Trugnan,Ginette Thomas,Hervé M. Blottière,Joël Doré,Philippe Marteau,Philippe Seksik,Philippe Langella +19 more
TL;DR: The results suggest that counterbalancing dysbiosis using F. prausnitzii as a probiotic is a promising strategy in CD treatment and exhibits anti-inflammatory effects on cellular and TNBS colitis models, partly due to secreted metabolites able to block NF-κB activation and IL-8 production.
Journal ArticleDOI
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.
References
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