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Transcriptional profiling of mouse ileum in response to colonization with a zebrafish or mouse gut microbiota

ABSTRACT: We compared gene expression in the small intestine (ileum) of mice that were either (i) germ-free, (ii) colonized with a conventional mouse cecal microbiota, (iii) colonized with a conventional zebrafish gut microbiota, or (iv) colonized with Pseudomonas aeruginosa PAO1. Keywords: response to microbial colonization

ORGANISM(S): Mus musculus

PROVIDER: GSE5198 | GEO | 2006/07/07

SECONDARY ACCESSION(S): PRJNA96557

REPOSITORIES: GEO

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Transcription profiling of mouse ileum in response to colonization with a zebrafish or mouse gut microbiota

Project description:We compared gene expression in the small intestine (ileum) of mice that were either (i) germ-free, (ii) colonized with a conventional mouse cecal microbiota, (iii) colonized with a conventional zebrafish gut microbiota, or (iv) colonized with Pseudomonas aeruginosa PAO1. Experiment Overall Design: Adult germ-free NMRI mice were colonized with either (i) a conventional mouse cecal microbiota harvested from adult Swiss-Webster mice (5 biological replicates), (ii) a conventional zebrafish intestinal microbiota harvested from adult C32 zebrafish (3 biological replicates), or (iii) a culture of Pseudomonas aeruginosa PAO1 (5 biological replicates). 14 days after colonization, total RNA was prepared from the ileum of each animal, with total RNA prepared from adult germ-free NMRI mouse ileum serving as negative controls (5 biological replicates). RNA was used as template to generate cRNA for hybridization to Affymetrix 430 v2 Mouse GeneChips.

2008-06-13 | E-GEOD-5198 | biostudies-arrayexpress

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Zebrafish response to microbiota

Project description:Vertebrates are colonized at birth by complex microbial communities (microbiota) that influence diverse aspects of host biology. We have used a functional genomics approach to identify zebrafish genes that are differentially expressed in response to the microbiota. We assessed RNA expression profiles from zebrafish larvae at 6 days post-fertilization (dpf) that were either raised continuously in the absence of any microorganism (germ-free or GF), or raised GF through 3dpf then colonized with a normal zebrafish microbiota (conventionalized or CONVD). Total RNA was purified from pooled intact zebrafish larvae (28-80 larvae/pool, 3 biological replicate pools/condition) using Trizol reagent (Invitrogen) followed by DNase I digestion (DNA-Free, Ambion) according to manufacturers' protocols. Total RNA from each replicate pool (12ug RNA/replicate) was used as template for independent cDNA synthesis and in vitro transcription reactions (BioArray HighYield RNA Transcript Labeling Kit; Enzo Life Sciences) to generate biotinylated cRNA targets. cRNA targets (20ug/replicate) were fragmented using standard methods. Hybridization and scanning were performed using standard Affymetrix protocol. Raw expression values were normalized (Invariant set method) and modeled (PM-MM model), and present/absent calls were generated using dChip software (build date Dec.11, 2005).

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