MicroRNA-34a promotes cardiomyocyte apoptosis post myocardial infarction through down-regulating aldehyde dehydrogenase 2.

Abstract:

:MicroRNA-34a (miR-34a) promotes apoptosis via down-regulating many anti-apoptotic proteins. Aldehyde dehydrogenase 2 (ALDH2) is an anti-apoptotic enzyme whose activity decline associates with myocardial injury. We tested hypothesis that miR-34a might play a pro-apoptotic role in myocardial infarction (MI) by down-regulating ALDH2. MiR-34a was highly increased while ALDH2 expression was decreased after experimental MI. Overexpression of miR-34a in neonatal rat cardiomyocyte could significantly enhance apoptosis and down-regulate ALDH2 expression. In 293 cells, luciferase reporter assay results demonstrated that ALDH2 was a direct target of miR-34a. Serum miR-34a levels in acute myocardial infarction (AMI) patients and rats were significantly higher than healthy subjects and sham rats. Our results proved that miR-34a could promote cardiomyocyte apoptosis via negatively regulating ALDH2 and circulating miR-34a was increased in the condition of MI. Thus, miR-34a may constitute a new therapeutic target and diagnostic marker for patients with MI.

journal_name

Curr Pharm Des

authors

Fan F,Sun A,Zhao H,Liu X,Zhang W,Jin X,Wang C,Ma X,Shen C,Zou Y,Hu K,Ge J

doi

10.2174/13816128113199990325

subject

Has Abstract

pub_date

2013-01-01 00:00:00

pages

4865-73

issue

27

eissn

1381-6128

issn

1873-4286

pii

CPD-EPUB-20130111-7

journal_volume

19

pub_type

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