Catechin Relieves Hypoxia/reoxygenation-induced Myocardial Cell Apoptosis Via Down-regulating LncRNA MIAT

Overview

Journal J Cell Mol Med

Specialties Cell Biology
Molecular Biology

Date 2020 Jan 20

PMID 31955523

Citations 13

Authors

Lin Cong

Yisheng Su

Dazhen Wei

Lu Qian

Dawei Xing

Jialin Pan

Ye Chen

Mingyuan Huang

Affiliations

Soon will be listed here.

Abstract

Background: Catechin protects heart from myocardial ischaemia/reperfusion (MI/R) injury. However, whether catechin inhibits H/R-induced myocardial cell apoptosis is largely unknown.

Objective: This study aims to investigate the underlying mechanism of catechin in inhibiting the apoptosis of H/R-induced myocardial cells.

Methods: LncRNA MIAT expression was detected by qRT-PCR. Cell viability of H9C2 cells was detected using CCK-8 assay. The apoptosis of H9C2 cells was detected by flow cytometry. The interaction between CREB and MIAT promoter regions was confirmed by dual-luciferase reporter gene assay and ChIP assay.

Results: In MI/R rats, catechin improved heart function and down-regulated lncRNA MIAT expression in myocardial tissue. In H/R-induced H9C2 cells, catechin protected against cell apoptosis, and lncRNA MIAT overexpression attenuated this protective effect of catechin. We confirmed that transcription factor CREB could bind to MIAT promoter region, and catechin suppressed lncRNA MIAT expression through up-regulating CREB. Catechin improved mitochondrial function and relieved apoptosis through promoting Akt/Gsk-3β activation. In addition, MIAT inhibited Akt/Gsk-3β activation and promoted cell apoptosis in H/R-induced H9C2 cells. Finally, we found catechin promoted Akt/Gsk-3β activation through inhibiting MIAT expression in H/R-induced H9C2 cells.

Conclusion: Catechin relieved H/R-induced myocardial cell apoptosis through regulating CREB/lncRNA MIAT/Akt/Gsk-3β pathway.

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