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- W4321749509 abstract "The RNA-binding protein (RBP) Regnase-1 is an endonuclease that regulates immune responses by modulating target mRNA stability. Regnase-1 degrades a group of inflammation-associated mRNAs, which contributes to a balanced immune response and helps prevent autoimmune diseases. Regnase-1 also cleaves its own mRNA by binding stem-loop (SL) RNA structures in its 3'UTR. To understand how this autoregulation is important for immune responses, we generated mice with a 2-bp genome deletion in the target SL of the Regnase-1 3'-untranslated region (3'UTR). Deletion of these nucleotides inhibited SL formation and limited Regnase-1-mediated mRNA degradation. Mutant mice had normal hematopoietic cell differentiation. Biochemically, mutation of the 3'UTR SL increased Regnase-1 mRNA stability and enhanced both Regnase-1 mRNA and protein levels in mouse embryonic fibroblasts (MEFs). The expression of Il6, a Regnase-1 target gene, was constitutively suppressed at steady-state in mutant MEFs. Additionally, Regnase-1 protein expression in mutant MEFs was significantly elevated compared to that in wild-type MEFs at steady state and upon proinflammatory cytokine stimulation. These data suggest a negative feedback mechanism for Regnase-1 expression and represent a unique mouse model to probe Regnase-1 overexpression in vivo." @default.
- W4321749509 created "2023-02-25" @default.
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- W4321749509 date "2023-03-02" @default.
- W4321749509 modified "2023-09-26" @default.
- W4321749509 title "Breaking self‐regulation of Regnase‐1 promotes its own protein expression" @default.
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- W4321749509 doi "https://doi.org/10.1111/gtc.13018" @default.
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