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Growth supressive effect of antisense-AKT2 constructs on proliferation and apoptosis in C6 gliomas:An in vitro and in vivo study

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Author:
No author available
Journal Title:
CHINESE JOURNAL OF NEUROSURGERY
Issue:
5
DOI:
10.3760/j.issn:1001-2346.2005.05.002
Key Word:
胶质瘤;反义;AKT2;基因治疗;增殖;凋亡

Abstract: 目的研究反义AKT2(antisense AKT2,AS-AKT2)cDNA对鼠脑胶质瘤细胞系C6的生长抑制作用.方法将AS-AKT2 cDNA构建体转染鼠脑胶质瘤细胞系C6,原位杂交和蛋白印迹鉴定后,应用PCNA阳性率和MTT法检测细胞增殖能力,TUNEL法计算凋亡指数.应用立体定向技术将C6细胞和转染反义AKT2 cDNA的C6细胞种植到SD大鼠的右侧尾状核作为对照组和转染组;并对颅内已经形成C6胶质瘤的大鼠进行脂质体包裹的AS-AKT2 cDNA和空载体治疗;MRI动态监测大鼠颅内肿瘤生长情况,并检测标本AKT2和PCNA表达以及细胞的凋亡情况.结果转染AS-AKT2cDNA后C6细胞AKT2表达显著抑制,增殖减慢,凋亡指数增加.反义治疗组和转染组大鼠生存时间明显延长;转染组和治疗组肿瘤标本AKT2表达下降或消失,PCNA阳性率降低,可见大量凋亡细胞,而对照组和空载组标本几乎没有凋亡细胞.结论体内外实验证明AS-AKT2 cDNA可以抑制肿瘤细胞增殖、诱导凋亡,AKT2可作为基因治疗胶质瘤的重要优选靶的.

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