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2015 ; 8
(4
): 3735-41
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Trimetazidine protects against hypoxia-reperfusion-induced cardiomyocyte
apoptosis by increasing microRNA-21 expression
#MMPMID26097555
Yang Q
; Yang K
; Li AY
Int J Clin Exp Pathol
2015[]; 8
(4
): 3735-41
PMID26097555
show ga
Myocardial tissue injury caused by ischemia and hypoxia is a major cause of fatal
diseases, including coronary atherosclerosis resulting from myocardial infarction
and stroke. Trimetazidine (TMZ), as an anti-ischemic and antioxidant agent, has
been demonstrated to preventing ischemia/reperfusion-induced cardiomyocyte
apoptosis. However, the anti-apoptosis mechanism of TMZ has not been fully
elucidated. The present study demonstrated that miR-21 involved
trimetazidine-induced anti-apoptosis during H/R injury in H9C2 cell. In this
study, TMZ increased miR-21 expression which further upregulated the Akt
signaling activity via suppressing the expression of phosphatase and tensin
homolog (PTEN) in H/R H9C2 cell. The increased activity of Akt signaling
decreased the ratio of Bax/Bcl-2 and the expression of caspase-3 and inhibited
H/R induced apoptosis. In conclusion, this study revealed the mechanism that TMZ
up-regulated miR-21 expression, then miR-21 targeted PTEN increasing the PI3K
pathway and finally the activation of this pathway counteracted the apoptotic
effect of hypoxia/reperfusion.