REV-ERBα integrates colon clock with experimental colitis through regulation of NF-κB/NLRP3 axis

Nature Communications
Shuai WangBaojian Wu

Abstract

The roles of Rev-erbα and circadian clock in colonic inflammation remain unclarified. Here we show colon clock genes (including Rev-erbα) are dysregulated in mice with DSS-induced colitis. In turn, disruption of the circadian clock exacerbates experimental colitis. Rev-erbα-deficient mice are more sensitive to DSS-induced colitis, supporting a critical role of Rev-erbα in disease development. Further, Rev-erbα ablation causes activation of Nlrp3 inflammasome in mice. Cell-based experiments reveal Rev-erbα inactivates Nlrp3 inflammasome mainly at the priming stage. Rev-erbα directly represses Nlrp3 transcription through specific binding to the promoter region. Additionally, Rev-erbα represses p65 transcription and indirectly repressed Nlrp3 via the NF-κB pathway. Interestingly, Rev-erbα activation in wild-type mice by SR9009 attenuates DSS-induced colitis, whereas the protective effects are lost in Nlrp3-/- and Rev-erbα-/- mice. Taken together, Rev-erbα regulates experimental colitis through its repressive action on the NF-κB/Nlrp3 axis. Targeting Rev-erbα may represent a promising approach for prevention and management of colitis.

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Citations

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Methods Mentioned

BETA
PCR
ELISA
immunoprecipitation
confocal microscopy
ChIP
Assay
enzyme-linked immunosorbent assay
transfection
electrophoresis

Software Mentioned

DESeq2
R package
STAR
PANTHER
RSEM
Quantity One

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