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Protein & Peptide Letters

Editor-in-Chief

ISSN (Print): 0929-8665
ISSN (Online): 1875-5305

Research Article

miR-490-3p Alleviates Cardiomyocyte Injury via Targeting FOXO1

Author(s): Jin Jiang, Jian Xu and Huifang Tang*

Volume 29, Issue 11, 2022

Published on: 06 October, 2022

Page: [917 - 924] Pages: 8

DOI: 10.2174/0929866529666220819120736

Price: $65

Abstract

Background: MicroRNA-490-3p (miR-490-3p) plays a role in the pathogeneses of a variety of cardiovascular diseases. Bioinformatic analysis showed that miR-490-3p was downregulated in the myocardial tissues of mice with myocardial infarction (MI). Nevertheless, the functions and mechanisms of miR-490-3p in MI remain unclear.

Methods: This study used an in-vitro model to investigate the role of miR-490-3p in MI. Human cardiac myocytes (HCMs) were cultured in a hypoxic environment. 3-(4,5)-Dimethylthiahiazo (-zy1)- 3,5-di-phenytetrazoliumromide (MTT) assay and flow cytometry were used to detect cell viability and apoptosis. The expression levels of forkhead box O1 (FOXO1) and miR-490-3p were detected by quantitative real-time PCR and Western blot. The levels of interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), lactate dehydrogenase (LDH), cardiac troponin I (cTnI), and creatine kinase MB (CK-MB) were detected by enzyme-linked immunosorbent assay (ELISA). The targeted relationship between miR-490-3p and FOXO1 3’UTR was determined by a dual-luciferase reporter gene assay.

Results: miR-490-3p was significantly down-regulated in hypoxia-induced HCM cells, while FOXO1 was markedly up-regulated. miR-490-3p overexpression inhibited HCM cell inflammatory responses and injury after hypoxia treatment. FOXO1 was validated to be a direct target of miR- 490-3p, and its overexpression weakened the effects of miR-490-3p on cell viability, apoptosis, as well as inflammatory responses.

Conclusion: miR-490-3p alleviates cardiomyocyte injury via targeting FOXO1 in MI.

Keywords: Myocardial, infarction, Hypoxia, Cardiomyocyte, MiR-490-3p, FOXO1

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