ZFP36 Alleviates MASLD Through Facilitating TEAD4 mRNA Degradation After Sleeve Gastrectomy.

RNA degradation plays a vital role in post-transcriptional regulation of gene expression. RNA stability is changed in the pathogenesis of metabolic dysfunction-associated steatotic liver disease (MASLD), but its role and underlying mechanisms in sleeve gastrectomy (SG) effectively remodeling hepatocytes and improving MASLD is unclear. A high-fat diet-induced MASLD model for SG and a hepatocyte-specific Zfp36 knockdown mouse model were established to evaluate the role of zinc finger protein 36 (ZFP36) in MASLD. The expression of ZFP36 and TEA domain transcription factor 4 (TEAD4) was examined in liver tissue samples from MASLD patients. Hepatic ZFP36 expression is downregulated in MASLD but is restored following SG. Hepatocyte-specific Zfp36 knockdown exacerbates high-fat diet-induced liver injury and impairs the therapeutic effect of SG on hepatic steatosis. Mechanistically, ZFP36 binds to TEAD4 mRNA to promote its degradation, thereby modulating the Hippo pathway. Inhibition of TEAD4 transcriptional activity reverses the aggravated MASLD phenotype caused by Zfp36 knockdown. In liver biopsy samples from MASLD patients, ZFP36 expression correlates negatively with TEAD4 expression. Collectively, these findings identify SG-induced upregulation of ZFP36 as a critical mechanism for alleviating MASLD through suppression of TEAD4.