The cardioprotective effect of necrostatin requires the cyclophilin-D component of the mitochondrial permeability transition pore.

The cardioprotective effect of necrostatin requires the cyclophilin-D component of the mitochondrial permeability transition pore.
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DOI:
10.1007/s10557-007-6067-6
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发表时间:
2007-12
影响因子:
3.4
通讯作者:
Smith, C. C. T.
Smith, C. C. T.
中科院分区:
医学3区
文献类型:
--
作者:
Lim, S. Y.;Davidson, S. M.;Mocanu, M. M.;Yellon, D. M.;Smith, C. C. T.

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Necrostatin (Nec-1) 可防止大脑和心脏缺血再灌注 (IR) 损伤。我们之前在本杂志上报道过,坏死他汀可以延迟离体心肌细胞线粒体通透性转换孔(MPTP)的开放。本研究的目的是使用缺乏 MPTP 关键成分(即亲环蛋白-D)的小鼠,更详细地研究 MPTP 在 necrostatin 介导的心脏保护中所起的作用。麻醉的野生型 (WT) 和亲环蛋白-D 敲除 (Cyp-D-/-) 小鼠接受开胸手术,包括 30 分钟的心肌缺血和 2 小时的再灌注,随后通过三苯基四唑染色评估梗死面积。再灌注时给予 Nec-1,显着限制了 WT 小鼠的梗塞面积(17.7±3% vs. 54.3±3%,P<0.05),但在 Cyp-D−/− 小鼠中则不然(28.3±7% vs. 30.8±6%,P>0.05)。总之,在 Cyp-D−/− 小鼠中获得的数据提供了进一步的证据,证明 Nec-1 通过调节再灌注时 MPTP 的开放来防止心肌 IR 损伤。
Necrostatin (Nec-1) protects against ischemia-reperfusion (IR) injury in both brain and heart. We have previously reported in this journal that necrostatin can delay opening of the mitochondrial permeability transition pore (MPTP) in isolated cardiomyocytes. The aim of the present study was to investigate in more detail the role played by the MPTP in necrostatin-mediated cardioprotection employing mice lacking a key component of the MPTP, namely cyclophilin-D. Anaesthetized wild type (WT) and cyclophilin-D knockout (Cyp-D-/-) mice underwent an open-chest procedure involving 30 minutes of myocardial ischemia and 2 hours of reperfusion, with subsequent infarct size assessed by triphenyltetrazolium staining. Nec-1, given at reperfusion, significantly limited infarct size in WT mice (17.7±3% vs. 54.3±3%, P<0.05) but not in Cyp-D−/− mice (28.3±7% vs. 30.8±6%, P>0.05). In conclusion, the data obtained in Cyp-D−/− mice provide further evidence that Nec-1 protects against myocardial IR injury by modulating MPTP opening at reperfusion.
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发表时间: 2007-08-01
影响因子: 10.8
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