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Expression data for UPEC and GBS cystitis in female C57BL/6 mice

ABSTRACT: Data defines for the first time a whole bladder transcriptome of UPEC cystitis in female C57BL/6 mice using genome-wide expression profiling and temporal analysis to map early host response pathways stemming from UPEC colonization We used microarrays to detail the global programme of gene expression in GBS UTI in mice over time and in UPEC UTI in mice at 24h

ORGANISM(S): Mus musculus

PROVIDER: GSE27575 | GEO | 2012/07/01

SECONDARY ACCESSION(S): PRJNA138381

REPOSITORIES: GEO

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Expression data for UPEC and GBS cystitis in female C57BL/6 mice

Project description:Data defines for the first time a whole bladder transcriptome of UPEC cystitis in female C57BL/6 mice using genome-wide expression profiling and temporal analysis to map early host response pathways stemming from UPEC colonization We used microarrays to detail the global programme of gene expression in GBS UTI in mice over time and in UPEC UTI in mice at 24h Whole mouse bladder collected at 2h and 24h following transurethral infection for RNA extraction and hybridization on Affymetrix microarrays. Non-pooled samples were used, with one array per mouse to expand power of expression profiles. Control mice for each time point received only PBS as a mock infection. Group sizes were five mice per group, and therefore five arrays were used per group. Whole mouse bladder collected at 24h following transurethral infection for RNA extraction and hybridization on Affymetrix microarrays. Non-pooled samples were used, with one array per mouse to expand power of expression profiles. Control mice for each time point received only PBS as a mock infection. Group sizes were five mice per group, and therefore five arrays were used per group.

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Project description:Data defines for the first time a whole bladder transcriptome of UPEC cystitis in female CBA mice using genome-wide expression profiling to map early host response pathways stemming from UPEC colonization We used microarrays to detail the global programme of gene expression in UPEC UTI in mice Whole mouse bladder collected at 2h following transurethral infection for RNA extraction and hybridization on Affymetrix microarrays. Non-pooled samples were used, with one array per mouse to expand power of expression profiles. Control mice received only PBS as a mock infection. Group sizes were five mice per group, and therefore five arrays were used per group.

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Project description:Urinary tract infections (UTI) are common and recurrent. Both host genetics and UTI history impact susceptibility to recurrent UTI (rUTI) in women and in animal models. To identify shared patterns of host response that correlate with susceptibility, we investigated bladder inflammatory and transcriptional kinetics in acute and rUTI models. We found that TNFɑ signaling kinetics differed with mouse strain and infection history. Mice resistant to severe UTI/rUTI displayed a robust TNFɑ-dependent inflammation during the first 6 hours of acute cystitis, which waned by 24 hours; mice that are susceptible varied in their early responses but were prone to severe inflammation at 24 hours post-infection. Depletion of TNFɑ in an rUTI model revealed that early TNFɑ signaling promoted colonization resistance via exfoliation of infected bladder cells, but prolonged TNFɑ signaling exacerbated inflammation, thereby worsening infection. Host genetics and disease history impacts susceptibility by regulating the kinetics of a common TNFɑ pathway.

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comparison of virulence factors and expression of specific genes of UPEC and APEC in vivo and in vitro

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Development of gene expression signatures for murine bladder: Control vs. UTI89

Project description:Antimicrobial peptides (AMPs) serve key proposed roles in defending the urinary tract against invading uropathogens, but individual AMPs bearing greatest responsibility for these functions remain largely unknown. We identified RegIIIγ as the most transcriptionally upregulated AMP in bladder transcriptomes following uropathogenic Escherichia coli (UPEC) infection. We confirmed induction of RegIIIγ mRNA during cystitis and pyelonephritis by quantitative RT-PCR. Immunoblotting demonstrates increased bladder and urinary RegIIIγ protein levels following UPEC infection. Immunostaining localizes RegIIIγ protein to urothelial cells of infected bladders and kidneys. Human patients with cystitis and pyelonephritis exhibit increased urine levels of the orthologous HIP/PAP protein. Recombinant RegIIIγ protein does not demonstrate bactericidal activity toward UPEC in vitro, but does kill Staphylococcus saprophyticus in a dose-dependent manner. RegIIIγ knockout and control urinary tracts contain comparable bacterial burden following experimental inoculation of UPEC as well as Gram-positive uropathogens. Thus, while RegIIIγ and HIP/PAP expression occurs in human and murine UTI, their specific functions in the urinary tract remain uncertain.

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Project description:Expression data for UPEC and GBS cystitis in female C57BL/6 mice

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Project description:Urinary tract infections (UTIs) are a very common bacterial infectious disease in humans, and uropathogenic Escherichia coli (UPEC) are the most frequent cause of UTIs. During infection, UPEC must cope with a variety of stressful conditions in the urinary tract. Here, we demonstrated that the small RNA (sRNA) RyfA of UPEC strains was required for resistance to oxidative and osmotic stresses. Inactivation of ryfA in UPEC strain CFT073 decreased urinary tract colonization in CBA/J mice and the ryfA mutant also had reduced production of type 1 and P fimbriae, which are known to be important for UTI. Transcriptomic analysis of the ryfA mutant showed changes in expression of genes associated with general stress responses, metabolism, biofilm formation and genes coding for cell surface proteins. Furthermore, loss of ryfA also reduced UPEC survival in human macrophages. Thus, ryfA plays a key regulatory role in UPEC adaptation to stress, that contributes to UTI and survival in macrophages.

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