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心肌缺血再灌注损伤过程中细胞凋亡的实验研究 被引量:2

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摘要 ①目的探讨心肌缺血再灌注损伤过程中的细胞凋亡。②方法采取结扎左冠状动脉前降支再灌注复制大鼠心肌缺血再灌注损伤的模型,观察缺血再灌注心肌细胞超微结构的变化;TUNEL检测DNA片段的存在,探讨细胞凋亡与Bcl-2/Bax蛋白表达的关系。③结果透射电镜观察缺血再灌注心肌细胞可见心肌细胞凋亡的超微结构特征;DNA电泳缺血再灌注组出现明显的细胞凋亡特有的梯形条纹图像。TUNEL结果表明,缺血再灌注组可见胞核呈深棕色反应的阳性凋亡心肌细胞。Bcl-2/Bax蛋白表达检测结果表明:缺血再灌注组显著增高。④结论大鼠急性缺血再灌注的整个病理生理过程存在着细胞凋亡现象,而心肌细胞凋亡可能被Bcl-2/Bax蛋白所调控。
出处 《华北煤炭医学院学报》 2006年第6期758-760,共3页 Journal of North China Coal Medical College
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