MiR-19a suppress apoptosis of myocardial cells in rats with myocardial ischemia/reperfusion through PTEN/Akt/P-Akt signaling pathway.

Abstract:

OBJECTIVE:To detect differentially expressed micro ribonucleic acids (miRNAs) in rats with myocardial ischemia/reperfusion (MIR), and to explore the influence of miR-19a on MIR rats and its mechanism. MATERIALS AND METHODS:Firstly, the Sprague-Dawley (SD) rats were used to prepare MIR models, RNAs were extracted, and miRNA sequencing analysis was carried out to determine differentially expressed miRNAs related to MIR. Secondly, the predicted target genes of miR-19a were collected, and WebGestalt was applied to analyze gene ontology (GO) and pathway enrichment. Thirdly, the expression of the related proteins and the apoptosis of myocardial cells in MIR rats were detected via Western blotting. Fourthly, the interaction between miR-19a and the target gene phosphatase and tensin homolog (PTEN) was examined through Luciferase reporter assay. RESULTS:Compared with that in the Sham operation (Sham) group, the miR-19a expression in rat myocardial tissues in the MIR group was significantly increased (p<0.05). Compared with those in the miR-negative control (miR-NC) group, the messenger RNA (mRNA) and protein expressions of PTEN in the miR-19a group were notably decreased (p<0.05). In comparison with the miR-NC group, miR-19a group had elevated expression of phosphorylated protein kinase B (p-Akt) (p<0.05). The Luciferase reporter gene assay manifested the direct binding of miR-19a to PTEN mRNA. CONCLUSIONS:MiR-19a inhibits the PTEN expression by directly binding to the 3'-UTR of PTEN mRNA, thus activating the Akt/p-Akt signaling pathway to suppress the apoptosis of myocardial cells in MIR injury.

authors

Ma Z,Lan YH,Liu ZW,Yang MX,Zhang H,Ren JY

doi

10.26355/eurrev_202003_20700

subject

Has Abstract

pub_date

2020-03-01 00:00:00

pages

3322-3330

issue

6

eissn

1128-3602

issn

2284-0729

journal_volume

24

pub_type

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