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Genome Res. 2017 Jul;27(7):1195-1206. doi: 10.1101/gr.220111.116. Epub 2017 Apr 6.

Microbiota regulate intestinal epithelial gene expression by suppressing the transcription factor Hepatocyte nuclear factor 4 alpha.

Author information

1
Department of Molecular Genetics and Microbiology, Center for the Genomics of Microbial Systems, Duke University, Durham, North Carolina 27710, USA.
2
Department of Cell Biology and Physiology, University of North Carolina, Chapel Hill, North Carolina 27599, USA.
3
Department of Pediatrics, Division of Medical Genetics, Center for Genomic and Computational Biology, Duke University, Durham, North Carolina 27708, USA.
4
Department of Integrative Biology and Pharmacology, McGovern Medical School, Houston, Texas 77030, USA.

Abstract

Microbiota influence diverse aspects of intestinal physiology and disease in part by controlling tissue-specific transcription of host genes. However, host genomic mechanisms mediating microbial control of intestinal gene expression are poorly understood. Hepatocyte nuclear factor 4 (HNF4) is the most ancient family of nuclear receptor transcription factors with important roles in human metabolic and inflammatory bowel diseases, but a role in host response to microbes is unknown. Using an unbiased screening strategy, we found that zebrafish Hnf4a specifically binds and activates a microbiota-suppressed intestinal epithelial transcriptional enhancer. Genetic analysis revealed that zebrafish hnf4a activates nearly half of the genes that are suppressed by microbiota, suggesting microbiota negatively regulate Hnf4a. In support, analysis of genomic architecture in mouse intestinal epithelial cells disclosed that microbiota colonization leads to activation or inactivation of hundreds of enhancers along with drastic genome-wide reduction of HNF4A and HNF4G occupancy. Interspecies meta-analysis suggested interactions between HNF4A and microbiota promote gene expression patterns associated with human inflammatory bowel diseases. These results indicate a critical and conserved role for HNF4A in maintaining intestinal homeostasis in response to microbiota.

PMID:
28385711
PMCID:
PMC5495071
DOI:
10.1101/gr.220111.116
[Indexed for MEDLINE]
Free PMC Article

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