Sevoflurane preconditioning attenuates myocardial ischemia/reperfusion injury via caveolin-3-dependent cyclooxygenase-2 inhibition.
Circulation
; 128(11 Suppl 1): S121-9, 2013 Sep 10.
Article
em En
| MEDLINE
| ID: mdl-24030395
ABSTRACT
BACKGROUND:
The inhaled anesthetic sevoflurane has been demonstrated to protect against myocardial ischemia/reperfusion (MI/R) injury via mechanisms involving AMP-activated protein kinase (AMPK) and caveolin-3 (Cav-3). However, the relative contributions of AMPK and Cav-3 to sevoflurane preconditioning (SF-PreCon)-mediated cardioprotection and their precise underlying mechanisms of action remain incompletely understood. METHODS ANDRESULTS:
SF-PreCon (consisting of 3 cycles of 15-minute exposure to 2% sevoflurane before 30 minutes of MI) decreased MI/R injury in wild-type mice (caspase-3 activity, -29.1%; infarct size, -20.2%; and left ventricular end diastolic pressure, -33.8%). In cardiac-specific AMPKα2 dominant-negative overexpressing mice, the cardioprotective effect of SF-PreCon was largely retained (caspase-3 activity, -26.7%; infarct size, -16.7%; and left ventricular end-diastolic pressure, -25.9%; P<0.01). In contrast, SF-PreCon failed to significantly protect Cav-3 knockout mice against MI/R injury (P>0.05). SF-PreCon significantly decreased MI/R-induced superoxide generation in wild-type (-43.6%) and AMPK dominant-negative overexpressing mice (-35.5%; P<0.01) but not in Cav-3 knockout mice. SF-PreCon did not affect nicotinamide adenine dinucleotide phosphate oxidase expression but significantly inhibited cyclooxygenase-2 expression in wild-type (-38.7%) and AMPK dominant-negative overexpressing mice (-35.8%) but not in Cav-3 knockout mice.CONCLUSIONS:
We demonstrate for the first time SF-PreCon mediates cardioprotection against MI/R injury via caveolin-3-dependent cyclooxygenase-2 inhibition and antioxidative effects.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Traumatismo por Reperfusão Miocárdica
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Precondicionamento Isquêmico Miocárdico
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Caveolina 3
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Inibidores de Ciclo-Oxigenase 2
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Éteres Metílicos
Limite:
Animals
Idioma:
En
Revista:
Circulation
Ano de publicação:
2013
Tipo de documento:
Article