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- W2063056670 abstract "Objectives MicroRNA-7 (miR-7) is highly connected to cancerous cell proliferation and metastasis. It is also involved in myocardial ischemia-reperfusion (I/R) injury and is upregulated in cardiomyocyte under simulated I/R (SI/R). We aimed to investigate the role of miR-7 during myocardial I/R injury in vitro and in vivo and a possible gene target. Methods and Results Real-time PCR revealed that miR-7a/b expression was upregulated in H9c2 cells after SI/R. Flow cytometry showed SI/R-induced cell apoptosis was decreased with miR-7a/b mimic transfection but increased with miR-7a/b inhibitor in H9c2 cells. In a rat cardiac I/R injury model, infarct size determination and TUNEL assay revealed that miR-7a/b mimic decreased but miR-7a/b inhibitor increased cardiac infarct size and cardiomyocyte apoptosis as compared with controls. We previously identified an important gene connected with cell apoptosis -- poly(ADP-ribose) polymerase (PARP) -- as a candidate target for miR-7a/b and verified the target by luciferase reporter activity assay and western blot analysis. Conclusions miR-7a/b is sensitive to I/R injury and protects myocardial cells against I/R-induced apoptosis by negatively regulating PARP expression in vivo and in vitro. miR-7a/b may provide a new therapeutic approach for treatment of myocardial I/R injury. Poly(ADP-ribose) polymerase." @default.
- W2063056670 created "2016-06-24" @default.
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- W2063056670 date "2014-03-03" @default.
- W2063056670 modified "2023-10-12" @default.
- W2063056670 title "MicroRNA-7a/b Protects against Cardiac Myocyte Injury in Ischemia/Reperfusion by Targeting Poly(ADP-Ribose) Polymerase" @default.
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- W2063056670 doi "https://doi.org/10.1371/journal.pone.0090096" @default.
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