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Effect of restin gene transfection on human gastric carcinoma xenograft growth in nude mice
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- Author:
- No author available
- Journal Title:
- WORLD CHINESE JOURNAL OF DIGESTOLOGY
- Issue:
- 33
- DOI:
- 10.3969/j.issn.1009-3079.2008.33.002
- Key Word:
- restin基因;转染;胃肿瘤;微血管密度;血管内皮生长因子
Abstract： 目的:探讨restin基因转染对胃癌细胞BGC803裸鼠移植瘤生长抑制作用及对肿瘤血管生成的影响.方法:将重组质粒pEGFP-restin转染BGC-803细胞,以绿色荧光蛋白示踪其对胃癌细胞BGC-803生长的影响:RT-PCR鉴定目的基因的表达:通过裸鼠移植瘤实验比较restin对裸鼠移植瘤的生长抑制作用,免疫组织化学染色方法观察微血管密度(MVD)和血管内皮生长因子(VEGF)的表达.结果:重组质粒经RT-PCR扩增后在600bp处稳定表达:将pEGFP-restin重质粒转染胃癌细胞BGC-803,荧光显微镜下见转染组细胞发出绿色荧光,肿瘤细胞形态不一;裸鼠移植瘤实验显示,与对照组(空载体组和未转染组)比较,转染组胃癌细胞生长速度缓慢,肿瘤体积小(P＜0.01);空载体组与转染组的抑瘤率分别为3.60%、29.02%:免疫组化显示,转染组肿瘤微血管密度减少(4.25±0.29 vs 9.79±0.94,10.34±1.22,均P＜0.05),转染组VEGF表达降低(12.24+3.45 vs 44.52±9.70,39.76±6.38,均P＜0.05).结论:restin基因转染可抑制裸鼠移植瘤生长,影响肿瘤新生血管形成可能是其抗肿瘤作用之一.
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