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Type of publication: Journal Article
Type of document: Full Paper

Year: 2012

Authors: Berry, D; Schwab, C; Milinovich, G; Reichert, J; Ben Mahfoudh, K; Decker, T; Engel, M; Hai, B; Hainzl, E; Heider, S; Kenner, L; Müller, M; Rauch, I; Strobl, B; Wagner, M; Schleper, C; Urich, T; Loy, A

Title: Phylotype-level 16S rRNA analysis reveals new bacterial indicators of health state in acute murine colitis.

Source: ISME J. 2012; 6(11):2091-2106

Authors Vetmeduni Vienna:

Hainzl Eva
Kenner Lukas
Müller Mathias
Strobl Birgit

Vetmed Research Units
Institute of Animal Breeding and Genetics

Human inflammatory bowel disease and experimental colitis models in mice are associated with shifts in intestinal microbiota composition, but it is unclear at what taxonomic/phylogenetic level such microbiota dynamics can be indicative for health or disease. Here, we report that dextran sodium sulfate (DSS)-induced colitis is accompanied by major shifts in the composition and function of the intestinal microbiota of STAT1(-/-) and wild-type mice, as determined by 454 pyrosequencing of bacterial 16S rRNA (gene) amplicons, metatranscriptomics and quantitative fluorescence in situ hybridization of selected phylotypes. The bacterial families Ruminococcaceae, Bacteroidaceae, Enterobacteriaceae, Deferribacteraceae and Verrucomicrobiaceae increased in relative abundance in DSS-treated mice. Comparative 16S rRNA sequence analysis at maximum possible phylogenetic resolution identified several indicator phylotypes for DSS treatment, including the putative mucin degraders Akkermansia and Mucispirillum. The analysis additionally revealed strongly contrasting abundance changes among phylotypes of the same family, particularly within the Lachnospiraceae. These extensive phylotype-level dynamics were hidden when reads were grouped at higher taxonomic levels. Metatranscriptomic analysis provided insights into functional shifts in the murine intestinal microbiota, with increased transcription of genes associated with regulation and cell signaling, carbohydrate metabolism and respiration and decreased transcription of flagellin genes during inflammation. These findings (i) establish the first in-depth inventory of the mouse gut microbiota and its metatranscriptome in the DSS colitis model, (ii) reveal that family-level microbial community analyses are insufficient to reveal important colitis-associated microbiota shifts and (iii) support a scenario of shifting intra-family structure and function in the phylotype-rich and phylogenetically diverse Lachnospiraceae in DSS-treated mice.

Keywords Pubmed: Animals
Bacteria/isolation & purification*
Colitis/chemically induced
Dextran Sulfate
Disease Models, Animal
In Situ Hybridization, Fluorescence
Inflammatory Bowel Diseases/complications
Inflammatory Bowel Diseases/genetics
Inflammatory Bowel Diseases/microbiology*
RNA, Bacterial/genetics
RNA, Ribosomal, 16S/genetics

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