| Pretreatment With Xenon Protected Immature Rabbit Heart From Ischaemia/Reperfusion Injury by Opening of the mitoK(ATP) Channel. | |
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MedLine Citation:
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PMID: 23261327 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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BACKGROUND: The noble gas anaesthetic, xenon has previously been shown to protect the adult myocardium from ischaemia/reperfusion (I/R) injury, however its effect on immature myocardium is unclear. The aim of this study was to investigate the effect of xenon on the isolated immature heart. METHODS: Isolated, immature (2-3weeks old) New Zealand rabbit hearts were perfused with Krebs-Henseleit buffer via Langendorff-mode. After 20min of baseline equilibration, hearts were pretreated with 75% xenon, 75% xenon+100μM diazoxide, or 75% xenon+100μM 5-hydroxydecanoate, and then subjected to 1h of global ischaemia and 3h of reperfusion. RESULTS: Pretreatment with 75% xenon significantly improved cardiac function (P<0.01 vs. the I/R group, respectively), limited myocardial infarct size (20.83±2.16%, P<0.01 vs. 35.82±2.14% of the I/R group), reduced cardiac enzyme release (CK-MB, 1.00±0.19IU/L, P<0.01 vs. 0.44±0.14IU/L of the I/R group; LDH, 6.15±1.06IU/L P<0.01 vs. 3.49±0.37IU/L of the I/R group) and decreased apoptosis (6.17±0.56%, P<0.01 vs. 11.31±0.93% of the I/R group). In addition, the mitochondrial structure changes caused by I/R injury were largely prevented by 75% xenon pretreatment (1.37±0.16, P<0.01 vs. 2.32±0.13 of the I/R group). The mitochondrial adenosine triphosphate-sensitive potassium (mitoK(ATP)) channel opener diazoxide did not influence the effect of xenon, but the specific mitoK(ATP) channel blocker 5-hydroxydecanoate completely abolished this effect. CONCLUSIONS: Our study demonstrated that pretreatment with 75% xenon protected immature heart from I/R injury, and this protection was probably mediated by preservation of myocardial mitochondria and opening of mitoK(ATP) channel. |
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Authors:
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Qian Li; Chunwei Lian; Ronghua Zhou; Tao Li; Xujin Xiang; Bin Liu |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-12-20 |
Journal Detail:
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Title: Heart, lung & circulation Volume: - ISSN: 1444-2892 ISO Abbreviation: Heart Lung Circ Publication Date: 2012 Dec |
Date Detail:
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Created Date: 2012-12-24 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100963739 Medline TA: Heart Lung Circ Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2012 Australian and New Zealand Society of Cardiac and Thoracic Surgeons (ANZSCTS) and the Cardiac Society of Australia and New Zealand (CSANZ). Published by Elsevier B.V. All rights reserved. |
Affiliation:
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Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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