人血管内皮细胞生长因子-165和人血管生成素-1促进大鼠缺血下肢血管新生Vascular endothelial grow factor 165 and angiopoitin-1 augment revascularization in a rat hindlimb ischemia model
宋建蓉,杨志健,张馥敏,马文珠,哈团柱,李传富,高翔
摘要(Abstract):
目的 观察肌肉转染腺病毒(adenovirus ,Ad )携带的人血管内皮细胞生长因子- 1 6 5(ves cularendothelialgrowfactor ,Ad5 VEGF1 65)和人血管形成素- 1 (angiopoietin- 1 ,Ad5 Ang -1 )基因对大鼠缺血下肢的生血管效应。方法 制作大鼠下肢血管闭塞模型,肌肉内注射Ad5 VEGF1 65 或 和Ad5 Ang -1 ,以Westernblot法检测生长因子蛋白表达,免疫组化检测基因导入后在缺血肌肉引起的效应。结果 肌肉经注射Ad5 VEGF1 65和Ad5 Ang- 1后高表达人VEGF1 65 蛋白和人Ang- 1蛋白。术后7d处理组与对照组新生毛细血管数目无明显差别。但术后1 4d和2 1dAng- 1和VEGF1 65 组的新生毛细血管 肌肉数目比明显高于对照组(P <0 . 0 1 ) ,VEGF1 65+Ang 1两因子合用组明显高于单用组(P <0. 0 1 )。Ad -VEGF1 65组及Ad VEGF1 65+Ad Ang 1合用组出现大量包围着一厚层αSMA阳性平滑肌细胞的血管,其数量与肌肉数比值明显高于对照组(P <0 . 0 1 )。因子单用组和合用组肌肉内出现大量溴化脱氧尿嘧啶阳性细胞浸润,部分细胞表面呈现C- Kit阳性,新生血管内皮细胞中也有C Kit阳性标记。结论 Ad5- VEGF1 65和Ad5 -Ang -1能促进缺血肢体血管新生,二者合用的生血管效应更为显著;VEGF1 65能促进包被平滑肌细胞的形似微小动脉的血管数量增多
关键词(KeyWords): 血管内皮细胞生长因子;血管形成素-1;血管生成;基因疗法
基金项目(Foundation): 江苏省科委自然科学基金(BK2001118);; 江苏省卫生重点项目(H2004)
作者(Author): 宋建蓉,杨志健,张馥敏,马文珠,哈团柱,李传富,高翔
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