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| Content Provider | PubMed Central |
|---|---|
| Author | Aune, Sverre E. Yeh, Steve T. Kuppusamy, Periannan Kuppusamy, M. Lakshmi Khan, Mahmood Angelos, Mark G. |
| Copyright Year | 2013 |
| Abstract | The neutrophil elastase inhibitor sivelestat (ONO-5046) possesses unknown mechanisms of cardioprotection when infused following global ischemia, even in the absence of neutrophils. Since myocardial ischemia-reperfusion injury is strongly associated with endothelial dysfunction and reactive oxygen species (ROS) generation during reperfusion, we have tested the hypothesis that infusion of sivelestat during postischemic low flow would preserve endothelial and contractile function and reduce infarct size through an ROS-mediated mechanism. Isolated male rat hearts, subjected to global ischemia of 25 minutes, were reperfused with low flow with or without sivelestat followed by a full flow reperfusion. Hearts treated with sivelestat showed a significant improvement of LV contractile function and a reduction in infarct size. Infusion of L-NAME (nonspecific blocker of endothelial nitric oxide synthase (eNOS)) along with sivelestat during reperfusion reversed the preservation of contractile function and infarct size. In vitro EPR spin trapping experiments showed that sivelestat treatment decreased superoxide adduct formation in bovine aortic endothelial cells (BAECs) subjected to hypoxia-reoxygenation. Similarly, dihydroethidine (DHE) staining showed decreased superoxide production in LV sections from sivelestat-treated hearts. Taken together, these results indicate that sivelestat infusion during postischemic low flow reduces infarct size and preserves vasoreactivity in association with decreased ROS formation and the preservation of nitric oxide. |
| Related Links | http://dx.doi.org/10.1155/2013/279847 |
| Starting Page | 279847 |
| File Format | |
| ISSN | 19420900 |
| e-ISSN | 19420994 |
| Journal | Oxidative Medicine and Cellular Longevity |
| Volume Number | 2013 |
| Language | English |
| Publisher | Hindawi Publishing Corporation |
| Publisher Date | 2013-01-01 |
| Access Restriction | Open |
| Rights Holder | Hindawi Publishing Corporation |
| Subject Keyword | Cell Biology Biochemistry Ageing Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Aging Medicine Biochemistry |
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