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Epithelial retinoic acid receptor beta regulates serum amyloid A expression and vitamin A-dependent intestinal immunity : Epithelial retinoic acid receptor β regulates serum amyloid A expression and vitamin A-dependent intestinal immunity
Cited 34 time in
Web of Science
Cited 36 time in Scopus
- Authors
- Issue Date
- 2019-05
- Publisher
- National Academy of Sciences
- Citation
- Proceedings of the National Academy of Sciences of the United States of America, Vol.116 No.22, pp.10911-10916
- Abstract
- Vitamin A is a dietary component that is essential for the development of intestinal immunity. Vitamin A is absorbed and converted to its bioactive derivatives retinol and retinoic acid by the intestinal epithelium, yet little is known about how epithelial cells regulate vitamin A-dependent intestinal immunity. Here we show that epithelial cell expression of the transcription factor retinoic acid receptor beta (RA beta) is essential for vitamin A-dependent intestinal immunity. Epithelial RAR beta activated vitamin A-dependent expression of serum amyloid A (SAA) proteins by binding directly to Saa promoters. In accordance with the known role of SAAs in regulating Th17 cell effector function, epithelial RAR beta promoted IL-17 production by intestinal Th17 cells. More broadly, epithelial RAR beta was required for the development of key vitamin A-dependent adaptive immune responses, including CD4(+) T-cell homing to the intestine and the development of IgA-producing intestinal B cells. Our findings provide insight into how the intestinal epithelium senses dietary vitamin A status to regulate adaptive immunity, and highlight the role of epithelial cells in regulating intestinal immunity in response to diet.
- ISSN
- 0027-8424
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