Abstract
CD4+ T helper (Th) differentiation is regulated by diverse inputs, including the vitamin A metabolite retinoic acid (RA). RA acts through its receptor RARα to repress transcription of inflammatory cytokines, but is also essential for Th-mediated immunity, indicating complex effects of RA on Th specification and the outcome of the immune response. We examined the impact of RA on the genome-wide transcriptional response during Th differentiation to multiple subsets. RA effects were subset-selective and were most significant in Th9 cells. RA globally antagonized Th9-promoting transcription factors and inhibited Th9 differentiation. RA directly targeted the extended Il9 locus and broadly modified the Th9 epigenome through RARα. RA-RARα activity limited murine Th9-associated pulmonary inflammation, and human allergic inflammation was associated with reduced expression of RA target genes. Thus, repression of the Th9 program is a major function of RA-RARα signaling in Th differentiation, arguing for a role for RA in interleukin 9 (IL-9) related diseases.
Original language | English (US) |
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Pages (from-to) | 106-120.e10 |
Journal | Immunity |
Volume | 50 |
Issue number | 1 |
DOIs | |
State | Published - Jan 15 2019 |
Externally published | Yes |
Keywords
- ATAC-seq
- ChIP-seq
- Enhancers
- Interleukin 9
- Interleukins
- RNA sequencing
- Retinoic acid
- T helper cells
- Th9 cells
- vitamin A
ASJC Scopus subject areas
- Immunology and Allergy
- Immunology
- Infectious Diseases