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Series GSE34253 Query DataSets for GSE34253
Status Public on Jul 18, 2013
Title Dietary heme modulates microbiota and mucosa of mouse colon without significant host-microbe cross talk
Organism Mus musculus
Experiment type Expression profiling by array
Summary Previously, we showed that dietary heme injured the colonic surface epithelium and induced hyperproliferation by changing the surface to crypt signaling. In this study we investigated whether bacteria play a role in this changed signaling. Dietary heme increased the Bacteroidetes and decreased the Firmicutes in colonic content. This shift was caused by a selective susceptibility of Gram-positive bacteria to the heme cytotoxic fecal waters, which is not observed for Gram-negative bacteria allowing expansion of the Gram-negative community. The increased amount of Gram-negative bacteria increased LPS exposure to colonocytes, however, there is no appreciable immune response detected in the heme-fed mice. There were no signs of sensing of the bacteria by the mucosa, as changes in TLR signaling were not present. This lack of microbe-host cross talk indicated that the changes in microbiota do not play a causal role in the heme-induced hyperproliferation.
Overall design Mice received control or heme diet for 14 days, whereafter pooled colon samples were analysed on microarrays.
Contributor(s) IJssennagger N, Rijnierse A, Muller M, Meer Rv
Citation(s) 23239972
Submission date Dec 08, 2011
Last update date Mar 04, 2019
Contact name Guido Hooiveld
Organization name Wageningen University
Department Div. Human Nutrition & Health
Lab Nutrition, Metabolism & Genomics Group
Street address HELIX, Stippeneng 4
City Wageningen
ZIP/Postal code NL-6708WE
Country Netherlands
Platforms (1)
GPL6246 [MoGene-1_0-st] Affymetrix Mouse Gene 1.0 ST Array [transcript (gene) version]
Samples (2)
GSM845897 Colon_Control_pool
GSM845898 Colon_Heme_pool
BioProject PRJNA149753

Download family Format
SOFT formatted family file(s) SOFTHelp
MINiML formatted family file(s) MINiMLHelp
Series Matrix File(s) TXTHelp

Supplementary file Size Download File type/resource
GSE34253_RAW.tar 7.9 Mb (http)(custom) TAR (of CEL)
Raw data provided as supplementary file
Processed data included within Sample table

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