MiR-27a/b Regulates Liver Regeneration by Posttranscriptional Modification of Tmub1

Digestive Diseases and Sciences
Xiang LanMenggang Liu

Abstract

Transmembrane and ubiquitin-like domain-containing 1 protein (Tmub1) negatively regulates liver regeneration. However, whether this regulation involves posttranscriptional modification of Tmub1 expression is unknown. The aim of the study was to investigate whether microRNA (miR)-27a/b regulates posttranscriptional modification of Tmub1 and cell proliferation during liver regeneration. Tmub1 mRNA 3'-untranslated region (UTR) sequences were analyzed using online software. A luciferase assay was used to verify the relationship between miR-27a/b and the 3'-UTR of Tmub1. Rat partial hepatectomy models were used to investigate miR-27a/b and Tmub1 levels after partial hepatectomy. MiR-27a/b expression was down- and up-regulated with mimics and inhibitors, respectively, to observe the effects of miR-27a/b on Tmub1 expression. Quantitative RT-PCR and Western blot analyses were used to measure miR-27a/b and Tmub1 expression. Hepatocyte proliferation was measured using the CCK8 method for BRL-3A liver cells and proliferating cell nuclear antigen and histone H3 phosphorylation in the regenerating liver. A potential binding site of miR-27a/b was found in the 3'-UTR sequence of Tmub1. Our luciferase assay confirmed that the Tmub1 mRNA 3'-UTR...Continue Reading

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Citations

Jul 4, 2019·Hepatology Research : the Official Journal of the Japan Society of Hepatology·Parul GuptaSenthil K Venugopal
Apr 6, 2021·World Journal of Hepatology·Yana V KiselevaYuri O Zharikov
Aug 30, 2020·The FEBS Journal·Maria Agnese Della-FaziaGiuseppe Servillo

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