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Targeting mitochondrial fission using Mdivi-1 in A clinically relevant large animal model of acute myocardial infarction: A pilot study

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dc.contributor.author Ong S.
dc.contributor.author Kwek X.
dc.contributor.author Katwadi K.
dc.contributor.author Hernandez-Resendiz S.
dc.contributor.author Crespo-Avilan G.
dc.contributor.author Ismail N.
dc.contributor.author Lin Y.
dc.contributor.author Yap E.
dc.contributor.author Lim S.
dc.contributor.author Myu Mai Ja K.
dc.contributor.author Ramachandra C.
dc.contributor.author Tee N.
dc.contributor.author Toh J.
dc.contributor.author Shim W.
dc.contributor.author Wong P.
dc.contributor.author Cabrera-Fuentes H.
dc.contributor.author Hausenloy D.
dc.date.accessioned 2020-01-15T21:48:13Z
dc.date.available 2020-01-15T21:48:13Z
dc.date.issued 2019
dc.identifier.issn 1661-6596
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/156067
dc.description.abstract © 2019 by the authors. Licensee MDPI, Basel, Switzerland. Background: New treatments are needed to reduce myocardial infarct size (MI) and prevent heart failure (HF) following acute myocardial infarction (AMI), which are the leading causes of death and disability worldwide. Studies in rodent AMI models showed that genetic and pharmacological inhibition of mitochondrial fission, induced by acute ischemia and reperfusion, reduced MI size. Whether targeting mitochondrial fission at the onset of reperfusion is also cardioprotective in a clinically-relevant large animal AMI model remains to be determined. Methods: Adult pigs (30–40 kg) were subjected to closed-chest 90-min left anterior descending artery ischemia followed by 72 h of reperfusion and were randomized to receive an intracoronary bolus of either mdivi-1 (1.2 mg/kg, a small molecule inhibitor of the mitochondrial fission protein, Drp1) or vehicle control, 10-min prior to reperfusion. The left ventricular (LV) size and function were both assessed by transthoracic echocardiography prior to AMI and after 72 h of reperfusion. MI size and the area-at-risk (AAR) were determined using dual staining with Tetrazolium and Evans blue. Heart samples were collected for histological determination of fibrosis and for electron microscopic analysis of mitochondrial morphology. Results: A total of 14 pigs underwent the treatment protocols (eight control and six mdivi-1). Administration of mdivi-1 immediately prior to the onset of reperfusion did not reduce MI size (MI size as % of AAR: Control 49.2 ± 8.6 vs. mdivi-1 50.5 ± 11.4; p = 0.815) or preserve LV systolic function (LV ejection fraction %: Control 67.5 ± 0.4 vs. mdivi-1 59.6 ± 0.6; p = 0.420), when compared to vehicle control. Similarly, there were no differences in mitochondrial morphology or myocardial fibrosis between mdivi-1 and vehicle control groups. Conclusion: Our pilot study has shown that treatment with mdivi-1 (1.2 mg/kg) at the onset of reperfusion did not reduce MI size or preserve LV function in the clinically-relevant closed-chest pig AMI model. A larger study, testing different doses of mdivi-1 or using a more specific Drp1 inhibitor are required to confirm these findings.
dc.relation.ispartofseries International Journal of Molecular Sciences
dc.subject Cardioprotection
dc.subject Drp1
dc.subject Ischemia/reperfusion injury
dc.subject Mdivi-1
dc.subject Mitochondrial morphology
dc.subject Pig
dc.title Targeting mitochondrial fission using Mdivi-1 in A clinically relevant large animal model of acute myocardial infarction: A pilot study
dc.type Article
dc.relation.ispartofseries-issue 16
dc.relation.ispartofseries-volume 20
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS16616596-2019-20-16-SID85071443689


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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