Ad-HGF基因修饰的胎盘间充质干细胞治疗兔肢体缺血的实验研究

wf(2016)

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Abstract
目的:研究重组腺病毒介导肝细胞生长因子( adenoviral vector mediated human hepatocyte growth factor,Ad-HGF)修饰的胎盘源间充质干细胞( placenta-derived mesenchymal stem cells,PMSC)在兔肢体缺血模型中促新生血管生成的作用。方法无菌取足月产妇胎盘胎儿面中心区域胎盘组织,胶原酶消化法分离干细胞,体外培养传代,感染Ad-HGF 48 h后收集细胞用于治疗兔肢体缺血实验。左侧治疗组后肢缺血肌肉组织内多点注射总细胞数5×106/ml Ad-HGF修饰的PMSC,右侧对照组后肢缺血肌肉组织内注射生理盐水。结果治疗后第14天腹主动脉穿刺行数字减影血管造影( digital subtraction angiography,DSA)检查,可见左侧肢体缺血治疗后微血管生成数明显多于未治疗右侧肢体,血管形成能力明显增强。苏木精伊红染色法( HE)后置光镜下观察显示,治疗组毛细血管密度明显大于未治疗组(P<0.05)。实时荧光定量聚合酶链反应(quantitative polymerase chain reaction,qPCR)检测后肢肌肉组织中血管内皮生长因子( vascular endothelial growth factor, VEGF)、碱性成纤维细胞生长因子( basic fibroblast growth factor,bFGF)、HGF的表达明显升高(P<0.05)。结论经Ad-HGF基因修饰的PMSC能明显促进血管新生,加快局部缺血组织血流循环的重建,是治疗肢体慢性缺血的有效手段。
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Key words
placenta,mesenchymal stem cells,Ad-HGF,limb ischemia,fibroblast growth factor,hepatocyte growth factor,vascular endothelial growth factor
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