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Inhibition of MicroRNA-92a Protects Against Ischemia/Reperfusion Injury in a Large-Animal Model

Open access
Hinkel, Rabea, Penzkofer, Daniela, Zühlke, Stefanie, Fischer, Ariane, Husada, Wira, Xu, Quan-Fu, Baloch, Elisabeth, van Rooij, Eva, Zeiher, Andreas M., Kupatt, Christian, Dimmeler, Stefanie·2013·Circulation

Abstract

Background—: MicroRNAs (miRs) are small noncoding RNAs that posttranscriptionally control gene expression. Small-animal studies suggest that miRs might offer novel therapeutic targets in cardiovascular diseases such as cardioprotection of murine hearts after myocardial infarction via miR-92a inhibitors. Because the functional benefits of miR-92a inhibitors in larger preclinical models are not known, we assessed the therapeutic efficacy of miR-92a inhibition in a porcine model of ischemia and reperfusion. Methods and Results—: Pigs (n=5 per group) underwent percutaneous ischemia/reperfusion (60 min/72 h or 7 days, respectively). Locked nucleic acid–modified antisense miR-92a (LNA-92a) was applied either regionally (antegrade or retrograde) with a catheter or systemically (intravenously). LNA-92a significantly ( P <0.01) reduced miR-92a expression in the infarct zone regardless of the application venue. However, catheter-based delivery, but not intravenous infusion, of LNA-92a significantly ( P <0.05) reduced the infarct size compared with control LNA–treated pigs, which correlated with an improved ejection fraction and left ventricular end-diastolic pressure ( P <0.05). Histochemistry revealed that LNA-92a increased capillary density but decreased leukocyte influx and cardiac cell death. Complete loss of miR-92a in mice attenuated the infarct-related myocardial dysfunction to a larger extent than cardiomyocyte-specific miR-92a deletion. In vitro, LNA-92a protected against hypoxia/reoxygenation–induced cardiomyocyte cell death. Conclusions—: Regional LNA-92a delivery reduces miR-92a levels and infarct size and postischemic loss of function. LNA-92a exerts cell-protective, proangiogenic, and anti-inflammatory effects. miR-92a inhibition might be a novel therapeutic tool to preserve cardiac function after ischemia.

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Metadata

Authors
Hinkel, R., Penzkofer, D., Zühlke, S., Fischer, A., Husada, W., Xu, Q.-F., Baloch, E., van Rooij, E., Zeiher, A. M., Kupatt, C., & Dimmeler, S.
Venue
Circulation
Published
2013-09-03
Volume
128
Issue
10
Pages
1066-1075
ISSN
  • 0009-7322 (ISSN-L)
  • 1524-4539
OpenAlex
W2117903449
Cited by
317
References
24
FWCI
21.12
Type
journal article
Language
en
Open access
bronze

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Hinkel, R., Penzkofer, D., Zühlke, S., Fischer, A., Husada, W., Xu, Q.-F., Baloch, E., van Rooij, E., Zeiher, A. M., Kupatt, C., & Dimmeler, S. (2013). Inhibition of MicroRNA-92a Protects Against Ischemia/Reperfusion Injury in a Large-Animal Model. Circulation. https://doi.org/10.1161/circulationaha.113.001904

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