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• W2045250384 startingPage "259" @default.
• W2045250384 abstract "5-Amino-4-imidazolecarboxamide riboside (AICAr) or acadesine has been proposed to exert cardioprotection by enhancing adenosine production in ischemic myocardium. However, there are conflicting reports on acadesine's effects in ischemic myocardium and few studies in which myocardial adenosine levels have been measured. The purpose of this study was to determine whether acadesine increases interstitial fluid adenosine levels and attenuates myocardial stunning or potentiates the effects of adenosine in the intact pig. In pentobarbital-anesthetized pigs, myocardial stunning was induced by 10 min left anterior descending coronary artery occlusion and 90 min reperfusion. Regional ventricular function was assessed by measuring systolic wall thickening, and interstitial nucleosides were estimated by cardiac microdialysis. Control hearts were compared with hearts treated with acadesine, adenosine, and adenosine plus acadesine. Adenosine pretreatment (100 microg x kg(-1) x min(-1), intracoronary) immediately prior to ischemia increased interstitial adenosine levels 9-fold and improved postischemic functional recovery from a control value of 17.6 +/- 4.1% to 43.6 +/- 3.4% of preischemic systolic wall thickening. In contrast, acadesine (20 mg/kg i.v. bolus 10 min prior to ischemia + 0.5 mg x kg (-1) x min(-1), i.v. infusion through 60 min reperfusion) had no effect on interstitial fluid adenosine levels or the recovery of regional function (21.5 +/- 5.9% recovery), nor were the functional effects of adenosine potentiated by acadesine. These findings indicate that acadesine does not enhance myocardial adenosine levels, attenuate myocardial stunning, or potentiate the cardioprotective effects of adenosine in the pig." @default.
• W2045250384 created "2016-06-24" @default.
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• W2045250384 date "1999-01-01" @default.
• W2045250384 modified "2023-09-23" @default.
• W2045250384 title "Effects of adenosine and acadesine on interstitial nucleosides and myocardial stunning in the pig" @default.
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• W2045250384 doi "https://doi.org/10.1139/cjpp-77-4-259" @default.
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