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- W2804582196 abstract "Regnase-1 is not only a key component in maintaining intracellular homeostasis but also a critical negative regulator in preventing autoimmune diseases and cancer development. To keep homeostatic state, Regnase-1 has to be maintained at a desired level in multiple cell types. However, the molecular mechanism of keeping a certain transcriptional level of Reganase-1 is largely unknown. In this study, we found a super-enhancer (Reg-1-SE) around Regnase-1 gene is able to control the homeostatic expression of Regnase-1. Functional inhibition of super-enhancers through BRD4 inhibitors or genetic silence of key components such as BRD4 and MED1 significantly downregulates Regnase-1 expression at multiple cell types. Consistently, treatment of JQ1 or I-BET-762 dramatically decreases the protein level of Regnase-1. By analyzing Regnase-1 gene, the distribution of H3K27Ac is highly enriched at a 8 kb DNA region around the second intron. Several DNA elements at the second intron are highly conserved between different species. Deletion of the second intron by CRISPR-Cas9 technology significantly reduces the expression of Regnase-1. JQ1 or I-BET-762 failed to further downregulate the expression of Regnase-1 in cells without the second intron. Our result reveals a novel molecular mechanism by which a super-enhancer around the second intron regulates the expression of Regnase-1, and in turn maintains a desired level of Regnase-1." @default.
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- W2804582196 date "2018-08-01" @default.
- W2804582196 modified "2023-10-18" @default.
- W2804582196 title "A super-enhancer maintains homeostatic expression of Regnase-1" @default.
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- W2804582196 doi "https://doi.org/10.1016/j.gene.2018.05.052" @default.
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