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Silencing of heparanase by siRNA inhibits tumor growth of human hepatocellular carcinoma in vitro and in vivo
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- Author:
- No author available
- Journal Title:
- WORLD CHINESE JOURNAL OF DIGESTOLOGY
- Issue:
- 2
- DOI:
- 10.3969/j.issn.1009-3079.2008.02.005
- Key Word:
- RNA干扰;肝素酶;肝癌;免疫印迹;免疫组化法
Abstract： 目的:采用RNA干扰(RNAi)技术抑制肝癌细胞系HepG2肝素酶(Hpa)的表达,体内观察其对肿瘤生长的抑制作用.方法:以脂质体介导的方法将构建的2个抗Hpa短发卡式RNA(Hpa-shRNA)真核表达载体稳定转染人肝癌细胞株HepG2(高表达Hpa),并设空载体对照组;流式细胞技术鉴定转染稳定性,Western blot及RT-PCR检测肝素酶蛋白和mRNA表达;将干扰组和对照组的肿瘤细胞皮下接种裸鼠,比较各组肿瘤的体质量和体积大小,免疫组化法检测肝素酶在肿瘤组织的表达.结果:与空载体组相比,干扰后的HepG2细胞中Hpa mRNA和蛋白表达明显降低,干扰组裸鼠的肿瘤生长速度明显变慢,统计结果表明干扰组在抑制肿瘤生长方面与空载体组、空白对照组存在显著差异(P＜0.05),两干扰组无显著差异(P＞0.05).结论:应用RNAi技术沉默Hpa基因可以有效下调肝癌肿瘤细胞中Hpa mRNA及蛋白的表达,抑制体内肿瘤生长.
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