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dc.contributor.author김현수-
dc.date.accessioned2017-01-05T02:01:42Z-
dc.date.available2017-01-05T02:01:42Z-
dc.date.issued2012-
dc.identifier.issn0022-4804-
dc.identifier.otherOAK-8668-
dc.identifier.urihttps://dspace.ewha.ac.kr/handle/2015.oak/233438-
dc.description.abstractBackground: Hyperglycemia attenuates cardioprotection by remifentanil-preconditioning in ischemia-reperfusion in vivo in diabetic rats. However, the effects of hyperglycemia in cultured ventricular myocytes remains unknown. Therefore, we examined the in vitro effects of hyperglycemia on hypoxia-reoxygenation (H/R) and cardioprotection from remifentanil- preconditioning in isolated neonatal rat ventricular myocytes (NRVMs), including effects on apoptotic signaling pathways and Ca 2+ homeostasis. Materials and Methods: NRVMs were cultured in medium with 5.5 mM (normoglycemia) or 25.5 mM glucose for one day. Then, NRVMs in H/R groups were exposed to 1 h of hypoxia and 5 h of reoxygenation with or without remifentanil-preconditioning at 1 μM. Cell viability, apoptosis, and Ca 2+ homeostasis were assessed by MTT assay, caspase-3 assay, confocal microscopy and immunoblots. Results: In normoglycemia, remifentanil-preconditioning improved the viability of cardiomyocytes (P < 0.01) and prevented the increase of caspase-3 activity and Ca 2+ overload after H/R injury (P < 0.05). In addition, decrease in Akt, ERK1/2, and Bcl-2, and the increase in Bax by H/R was attenuated by remifentanil-preconditioning (P < 0.05). However, in hyperglycemia, the viability was partially impaired after H/R but not improved by remifentanil-preconditioning. Apoptotic activity, Ca 2+ concentration, and apoptotic kinases except Akt were not affected by either H/R or remifentanil-preconditioning under hyperglycemia. Akt phosphorylation was decreased by H/R but not restored by remifentanil preconditioning. Conclusions: Remifentanil preconditioning under normoglycemia renders NRVMs resistant to H/R injury by reducing apoptosis and intracellular Ca 2+ concentrations. The mechanism appears to be modulation of apoptotic signaling. However, hyperglycemia mitigates H/R injury in NRVMs, and may reduce the protective effect of remifentanil-preconditioning that may be associated with the Akt pathways. © 2012 Elsevier Inc. All rights reserved.-
dc.languageEnglish-
dc.titleHyperglycemia attenuates myocardial preconditioning of remifentanil-
dc.typeArticle-
dc.relation.issue2-
dc.relation.volume174-
dc.relation.indexSCI-
dc.relation.indexSCIE-
dc.relation.indexSCOPUS-
dc.relation.startpage231-
dc.relation.lastpage237-
dc.relation.journaltitleJournal of Surgical Research-
dc.identifier.doi10.1016/j.jss.2011.01.018-
dc.identifier.wosidWOS:000302777500016-
dc.identifier.scopusid2-s2.0-84859518270-
dc.author.googleKim H.S.-
dc.author.googleKim S.Y.-
dc.author.googleKwak Y.L.-
dc.author.googleHwang K.C.-
dc.author.googleShim Y.H.-
dc.contributor.scopusid김현수(57191717719;57191718092)-
dc.date.modifydate20230620101535-
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자연과학대학 > 생명과학전공 > Journal papers
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