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- W1967092720 abstract "A/JCr mice develop typhlitis in response to Helicobacter hepaticus infection, whereas C57BL/6 mice coexist with this bacterium in a “commensal” relationship and do not develop disease even during prolonged colonization. To determine mechanisms that control this balance between responsiveness and nonresponsiveness, the mucosal response of A/JCr and C57BL/6 mice to acute H. hepaticus colonization was evaluated using genome-wide profiling. Transcription levels for a subset of gene discoveries were then evaluated longitudinally by semiquantitative real-time reverse-transcriptase polymerase chain reaction (RT-PCR) to identify changes in gene expression that occur during progression from the acute to chronic phase of colonization. To determine whether chronic mucosal inflammation in A/JCr mice was mediated through a Th1 mechanism, as was inferred from the gene expression data, mice with typhlitis were treated with neutralizing antibody targeting IL-12/23p40 or IFN-gamma and the response to treatment was determined by cecal lesion severity and transcription of disease-related genes. A/JCr mice had a biphasic expression of proinflammatory genes that corresponded with the acute and chronic phases of disease. In contrast, C57BL/6 mice exhibited a less robust acute transcriptional response that waned by day 30 postinoculation. Sustained upregulation of proinflammatory signals and responsiveness to anti-IL-12/23p40 and anti-IFN-γ antibody suggests that inflammation in A/JCr mice was mediated through a Th1 mechanism. Prolonged upregulation of SOCS3 during the acute response to colonization suggests that C57BL/6 mice maintain mucosal homeostasis, at least in part by attenuating responsiveness to cytokine signaling. Collectively, these findings provide a foundation for understanding the immunological mechanisms that confer resistance or susceptibility to H. hepaticus-induced typhlitis." @default.
- W1967092720 created "2016-06-24" @default.
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- W1967092720 date "2007-07-01" @default.
- W1967092720 modified "2023-10-15" @default.
- W1967092720 title "Characterization of cecal gene expression in a differentially susceptible mouse model of bacterial-induced inflammatory bowel disease" @default.
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- W1967092720 doi "https://doi.org/10.1002/ibd.20138" @default.
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