急性心肌梗死猝死患者心肌细胞凋亡的研究

被引:19
作者
马中富
马虹
叶任高
罗斌
朱全胜
吴金浪
机构
[1] 中山医科大学附属第一医院!广东广州
[2] 中山医科大学基础学院!广东广州
关键词
细胞凋亡; 心肌梗死,急性; 猝死;
D O I
暂无
中图分类号
R542.22 [];
学科分类号
1002 ; 100201 ;
摘要
目的 :探讨细胞凋亡在急性心肌梗死时心肌细胞死亡中的意义。方法 :用末端原位标记 (TU NEL )法、DNA电泳和电镜 3种方法检测急性心肌梗死猝死患者和心脏正常的车祸死亡者心肌细胞的凋亡。结果 :TU NEL 法发现 ,猝死者梗死区的心肌细胞凋亡数 (5 5 7.95± 1 4 4.1 0 )× 1 0 - 3明显高于正常对照组 (34 .30±2 0 .6 8)× 1 0 - 3(P=0 .0 0 0 0 ) ;心肌细胞凋亡数在冠脉 1支病变者为 (5 0 6 .38± 1 75 .88)× 1 0 - 3<2支病变者为(5 5 4.38± 92 .1 5 )× 1 0 - 3<3支病变者为 (6 6 8.2 5± 1 2 7.1 9)× 1 0 - 3,虽然均明显高于正常对照组 (P均 <0 .0 5 ) ,但 3组之间比较则无统计学差别 (P均 >0 .0 5 ) ;冠脉 2~ 3支病变者梗死区的心肌细胞 DNA电泳可见相差约1 80~ 2 0 0 bp的阶梯片段 ;电镜发现猝死者梗死区内的心肌细胞核膜完整、染色质浓集、电子密度增加的凋亡特征 ,有的则出现核膜破裂、染色质溶解成碎屑的坏死现象。结论 :细胞凋亡在急性心肌梗死猝死者的心肌细胞死亡中起重要作用。
引用
收藏
页码:137 / 141
页数:5
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