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首页> 外文期刊>Vascular and endovascular surgery >Atrial natriuretic peptide protects against ischemia-reperfusion injury in rabbit hearts in vivo.
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Atrial natriuretic peptide protects against ischemia-reperfusion injury in rabbit hearts in vivo.

机译:心钠素在体内可防止兔心脏缺血再灌注损伤。

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The aim of this study is to investigate whether atrial natriuretic peptide can mimic preconditioning to protect ischemia or reperfusion injury in rabbit hearts. New Zealand white rabbits were randomized into 3 groups: (1) Controls. Hearts received a 60 minute-occlusion of the left anterior descending artery, followed by a 180 minute-reperfusion. (2) Preconditioning. Two 5-minute periods of ischemia separated by a 10-minute reperfusion, followed by a 60-minute ischemia and a 180-minute reperfusion. (3) Atrial natriuretic peptide treatment. Bolus injection of exogenous atrial natriuretic peptide (2.5 microg/kg) given intravenously at 15 minutes prior to 60 minute-ischemia followed by a 180-minute reperfusion. Myocardial necrotic area and area at risk of necrosis were determined by triphenyltetrazolium chloride staining. Ratio of necrotic area to area at risk was 49.95% +/- 1.15%, 7.95% +/- 0.33%, and 8.36% +/- 0.61% in the controls, preconditioning group, and atrial natriuretic peptide group, respectively. Both preconditioning and atrial natriuretic peptide significantly reduced the size of infarct caused by ischemia (preconditioning vs controls, P .05; atrial natriuretic peptide vs controls, P .05). Atrial natriuretic peptide can mimic ischemic preconditioning to protect rabbit hearts from prolonged ischemia and reperfusion injury. It may be involved in the cardioprotective mechanisms of preconditioning.
机译:这项研究的目的是研究心钠素是否可以模仿预处理来保护兔心脏的缺血或再灌注损伤。将新西兰白兔随机分为3组:(1)对照组。心脏接受左前降支动脉60分钟闭塞,然后再灌注180分钟。 (2)预处理。两次5分钟的局部缺血间隔为10分钟的再灌注,然后进行60分钟的局部缺血和180分钟的再灌注。 (3)心钠素治疗。在缺血60分钟前15分钟静脉注射外源性心钠素(2.5 microg / kg)进行小瓶注射,然后再灌注180分钟。通过氯化三苯基四唑鎓染色确定心肌坏死面积和有坏死危险的面积。在对照组,预处理组和心钠素组中,坏死面积与风险面积的比例分别为49.95%+/- 1.15%,7.95%+/- 0.33%和8.36%+/- 0.61%。预处理和心钠素均显着减少了缺血引起的梗塞面积(预处理与对照相比,P <.05;心脏利钠肽与对照,P <.05)。心钠素可以模拟缺血预处理,以保护兔心脏免于长期缺血和再灌注损伤。它可能参与预处理的心脏保护机制。

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