平滑肌细胞凋亡对血管球囊损伤后内膜增殖的影响

被引:5
作者
王耿
何国祥
迟路湘
景涛
王海东
机构
[1] 第三军医大学附属西南医院心血管内科!重庆
关键词
血管平滑肌; 细胞凋亡; 血管内膜;
D O I
10.16016/j.1000-5404.2000.03.027
中图分类号
R363 [病理生理学];
学科分类号
摘要
目的 :探讨血管球囊损伤后内膜增殖的机制。方法 :采用电镜、末端脱氧核苷酸转移酶介导的三磷酸脱氧尿嘧啶缺口末端标记法 (TUNEL)和免疫组织化学技术检测球囊损伤后血管平滑肌细胞 (VSMC)凋亡及新生内膜面积的变化。结果 :球囊损伤后血管壁增生 ,球囊损伤后第 3天 ,血管中层出现凋亡的平滑肌细胞 (SMC) ;损伤后第 7天 ,新生内膜形成 ,内膜和中层SMC凋亡率最高 ,凋亡的SMC主要分布在内膜层 ,以后逐渐降低 ;至损伤后第 2 8天 ,仅内膜层有少量凋亡的SMC ;血管紧张素Ⅱ 1型受体 (AT1R )拮抗剂Irbesartan显著增加SMC凋亡和抑制内膜增生。结论 :VSMC凋亡不足是球囊损伤后血管内膜增生的机制之一。
引用
收藏
页码:268 / 271
页数:4
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