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首页> 外文期刊>Canadian Journal of Physiology and Pharmacology >Myocardial function following cold ischemic storage is improved by cardiac-specific overexpression of A1-adenosine receptors.
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Myocardial function following cold ischemic storage is improved by cardiac-specific overexpression of A1-adenosine receptors.

机译:A1-腺苷受体的心脏特异性过表达改善了冷缺血存储后的心肌功能。

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摘要

Cold ischemic storage of hearts for transplantation is limited to 4-6 h, and therefore the development of strategies to extend preservation time may increase the donor pool of hearts. Overexpression of A1-adenosine receptors (A1AR) can protect hearts from acute ischemic injury, and the purpose of this study was to test the hypothesis that overexpression of A1AR will improve tolerance to longer periods of cold ischemic preservation. Hearts from 18 wild type and 16 transgenic mice with overexpression of A1AR (A1AR Trans) were isolated and perfused, and then subjected to 18 h of preservation in 5 degrees C University of Wisconsin solution followed by 2 h of reperfusion. Left ventricular end diastolic pressure and left ventricular developed pressure were measured as indices of ventricular function. Cell viability was assessed by determination of infarct size and myocardial cell apoptosis. A1AR Trans hearts showed improved function following 18 h of ischemia, as shown by lower end diastolic pressure (p < 0.05) and higher recovery of left ventricular developed pressure (p < 0.05) during reperfusion. A1AR Trans hearts had markedly reduced infarct size (p < 0.05) and decreased apoptosis (p < 0.05). Overexpression of cardiac A1AR imparts cardioprotection during long-term cold ischemic preservation.
机译:用于移植的心脏的冷缺血存储限制为4-6小时,因此,延长保存时间的策略的开发可能会增加心脏的供体库。 A1腺苷受体(A1AR)的过表达可以保护心脏免受急性缺血性损伤的影响,本研究的目的是检验以下假设:A1AR的过表达将提高对较长时间的冷缺血保存的耐受性。分离并灌注来自18只野生型和16只具有过表达A1AR(A1AR Trans)的转基因小鼠的心脏,然后在5℃的威斯康星大学溶液中保存18 h,然后再灌注2 h。测量左心室舒张末期压力和左心室发育压力作为心室功能指标。通过测定梗塞面积和心肌细胞凋亡来评估细胞活力。缺血18小时后,A1AR Trans心脏表现出更好的功能,如再灌注期间舒张压降低(p <0.05)和左室发达压力恢复(p <0.05)更高。 A1AR Trans心脏显着减少了梗塞面积(p <0.05)和减少了凋亡(p <0.05)。心脏A1AR的过表达在长期冷缺血保存中赋予心脏保护作用。

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