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抑制促血管生成素基因表达对肝癌血管生成的影响 被引量:4

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摘要 目的:观察抑制促血管生成素-2(Ang-2)基因表达后对人肝癌细胞系SMMC7721体外成瘤性和血管生成的影响,阐明Ang-2基因在肝癌血管生成和转移过程中的作用,为研究抗血管生成疗法奠定基础。方法:选择携带Ang-2基因的肝癌细胞系SMMC7721,通过脂质体介导的基因转染方法将特异干扰性小RNA(siRNA)基因导入SMMC7721肝癌细胞系,并用G418筛选稳定表达的细胞克隆,用RT-PCR和免疫荧光法检测是否成功构建了抑制Ang-2基因表达的SMMC7721肝癌细胞系。将63只裸鼠随机分成3组,分别用转染和未转染siRNA基因的携带Ang-2基因SMMC7721肝癌细胞及不携带Ang-2基因SMMC7721肝癌细胞注射于裸鼠皮下产生肿瘤结节,观察肿瘤的生长的速度并对肿瘤组织中的微血管进行检测。结果:用RT-PCR方法从RNA水平以及用免疫荧光法从蛋白质水平均证实新构建的肝癌细胞系成功抑制了Ang-2基因及其蛋白产物的表达。抑制了Ang-2基因后肿瘤生长速度明显减慢(P<0.05),肿瘤组织中血管生成的数量较未转染前明显减少(P<0.05)。结论:Ang-2的表达增强了人肝癌细胞系SMMC7721的体外成瘤性并促进了肿瘤组织中的血管生成。抑制Ang-2的表达可以明显减弱这种促进作用。
出处 《实用医学杂志》 CAS 北大核心 2010年第5期741-743,共3页 The Journal of Practical Medicine
基金 珠海市卫生局科研基金资助项目(编号:2009107)
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参考文献10

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二级参考文献22

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