| First Author | Murray IA | Year | 2016 |
| Journal | Sci Rep | Volume | 6 |
| Pages | 33969 | PubMed ID | 27659481 |
| Mgi Jnum | J:336838 | Mgi Id | MGI:6225900 |
| Doi | 10.1038/srep33969 | Citation | Murray IA, et al. (2016) Expression of the aryl hydrocarbon receptor contributes to the establishment of intestinal microbial community structure in mice. Sci Rep 6:33969 |
| abstractText | Environmental and genetic factors represent key components in the establishment/maintenance of the intestinal microbiota. The aryl hydrocarbon receptor (AHR) is emerging as a pleiotropic factor, modulating pathways beyond its established role as a xenobiotic sensor. The AHR is known to regulate immune surveillance within the intestine through retention of intraepithelial lymphocytes, functional redistribution of Th17/Treg balance. Consequently, environmental/genetic manipulation of AHR activity likely influences host-microbe homeostasis. Utilizing C57BL6/J Ahr(-/+) and Ahr(-/-) co-housed littermates followed by 18 days of genotypic segregation, we examined the influence of AHR expression upon intestinal microbe composition/functionality and host physiology. 16S sequencing/quantitative PCR (qPCR) revealed significant changes in phyla abundance, particularly Verrucomicrobia together with segmented filamentous bacteria, and an increase in species diversity in Ahr(-/-) mice following genotypic segregation. Metagenomics/metabolomics indicate microbial composition is associated with functional shifts in bacterial metabolism. Analysis identified Ahr(-/-)-dependent increases in ileal gene expression, indicating increased inflammatory tone. Transfer of Ahr(-/-) microbiota to wild-type germ-free mice recapitulated the increase Verrucomicrobia and inflammatory tone, indicating Ahr(-/-)-microbial dependence. These data suggest a role for the AHR in influencing the community structure of the intestinal microbiota. |
