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Transcriptional Profiling of the Small Intestine and the Colon Reveals Modulation of Gut Infection with <i>Citrobacter rodentium</i> According to the Vitamin A Status
oleh: Zhi Chai, Yafei Lyu, Qiuyan Chen, Cheng-Hsin Wei, Lindsay M. Snyder, Veronika Weaver, Aswathy Sebastian, István Albert, Qunhua Li, Margherita T. Cantorna, Catharine Ross
Format: | Article |
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Diterbitkan: | MDPI AG 2022-04-01 |
Deskripsi
Vitamin A (VA) deficiency and diarrheal diseases are both serious public health issues worldwide. VA deficiency is associated with impaired intestinal barrier function and increased risk of mucosal infection-related mortality. The bioactive form of VA, retinoic acid, is a well-known regulator of mucosal integrity. Using <i>Citrobacter rodentium</i>-infected mice as a model for diarrheal diseases in humans, previous studies showed that VA-deficient (VAD) mice failed to clear <i>C. rodentium</i> as compared to their VA-sufficient (VAS) counterparts. However, the distinct intestinal gene responses that are dependent on the host’s VA status still need to be discovered. The mRNAs extracted from the small intestine (SI) and the colon were sequenced and analyzed on three levels: differential gene expression, enrichment, and co-expression. <i>C. rodentium</i> infection interacted differentially with VA status to alter colon gene expression. Novel functional categories downregulated by this pathogen were identified, highlighted by genes related to the metabolism of VA, vitamin D, and ion transport, including improper upregulation of Cl<sup>−</sup> secretion and disrupted HCO<sub>3</sub><sup>−</sup> metabolism. Our results suggest that derangement of micronutrient metabolism and ion transport, together with the compromised immune responses in VAD hosts, may be responsible for the higher mortality to <i>C. rodentium</i> under conditions of inadequate VA.