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Transcriptome analysis of infected and uninfected mice with Citrobacter rodentium

ABSTRACT: Transcriptome analysis of infected and uninfected mice with Citrobacter rodentium

PROVIDER: PRJNA435929 | ENA |

REPOSITORIES: ENA

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Transcriptome analysis of infected and uninfected mice with Citrobacter rodentium

Project description:Transcriptome analysis of infected and uninfected mice with Citrobacter rodentium

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RNAseq of colon intestinal epithelium extracted from mice infected with Citrobacter rodentium

Project description:The intestinal epithelium is our first line of defense against infections of the gut and the plasticity in cellular differentiation of the intestinal epithelium is an important part of this response. Here we sequenced the colon intestinal epithelium from mice infected with Citrobacter rodentium to determine how the intestinal epithelium adapts in the context of an infection. By comparing these data to small intestinal organoids treated with cytokines (see related accessions) we determine that the intestinal epithelial response to C. rodentium infection correspond to a type III infection driven by IL22.

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Gene expression in IL-10-deficient and wild-type mice following Citrobacter rodentium infection

Project description:To further understand immune mechanims involved in regulating intestinal inflammation, we employed whole genome microarray expression profiling as a discovery platform to identify genes with the potential of regulating inflammation in the absence of IL-10. Whole colon tissue from IL-10-deficient and C57BL/6 (wild-type) mice was collected 2 weeks after Citrobacter rodentium infection and from uninfected controls. Consistent with the histological and cellular analysis, expression levels of many chemokines and cytokines involved in recruiting leukocytes and promoting inflammation were, on average, lower in IL-10 deficient compared to wild-type mice after infection. An exception to this general trend was IL-27, a cytokine with both pro- and anti-inflammatory properties. Two weeks after Citrobacter rodentium challenge, total RNA was extracted and analyzed from whole colon tissue of infected IL-10-deficient and wild-type mice, and compared to uninfected controls. Each sample contained equal amounts of total RNA from 4-5 female mice which were pooled and used in the experiment.

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Citrobacter rodentium ICC168 CPX SILAC

Project description:SILAC experiment to investigate proteome changes in response to the disruption of CPX in Citrobacter rodentium ICC168.

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Citrobacter rodentium triggers exaggerated mucosal responses in mice developing severe intestinal disease

Project description:Citrobacter rodentium is commonly used to elucidate mucosal responses to infection in mice developing mild disease (e.g. C57BL/6), while little is known about host responses to infection in mice developing severe disease (e.g. C3H/HeN). We report that the phyla Bacteroidetes is a minor component of the tissue-associated microbiome in uninfected C3H/HeN mice. Following infection, C. rodentium rapidly and uniformly colonises the C3H/HeN colonic mucosa, which coincides with downregulation of proteins involved in the TCA cycle and oxidative phosphorylation in intestinal epithelial cells (IECs). In contrast, we observed upregulation of DNA replication and DNA damage repair processes, as well as cholesterol biogenesis, import and export, nutritional immunity, IL-22 and INFg responses, and expression of NLRP3, in IECs. Moreover, C. rodentium triggers a staggered cell proliferation response from 3 days post infection, which correlated with a higher abundance of SLC5A9 and reduced abundance of the IEC differentiation markers SLC26A3 and CA4. Uniquely, C. rodentium triggers differential secretion of gel-forming mucins, with the number of goblet cells filled with acidic and neutral mucins dramatically increasing and decreasing, respectively. Together, these results show that despite vigorous responses, C3H/HeN mice succumb to C. rodentium infection, possibly as a result of excessive and disordered mucosal responses.

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