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Killing effect of adenovirus mediated fusion gene cytosine and deaminase uracil phosphoribosyl transferase directed by glutathione S-transferase P1 promoter on cisplatin-resistant ovarian cancer cells in vitro
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY
- Issue:
- 7
- DOI:
- 10.3760/j.issn:0529-567X.2004.07.013
- Key Word:
- 腺病毒科;谷胱甘肽-转移酶;启动区(遗传学);基因,转基因,自杀;卵巢肿瘤;顺铂
Abstract： 目的观察谷胱甘肽-S-转移酶P1(GSTP1)启动子调控的胞嘧啶脱氨酶和尿嘧啶磷酸核糖转移酶融合基因(CD-UPP,即自杀基因)表达的腺病毒载体,对卵巢癌顺铂耐药细胞的体外杀伤作用.方法采用细菌内同源重组法构建腺病毒载体,设立卵巢癌顺铂敏感细胞株A2780和以其诱导的耐药细胞株A2780/DDP,在体外用重组腺病毒转染两组细胞并联合应用前药5-氟胞嘧啶(5-FC),观察两组卵巢癌细胞对5-FC的敏感性.将CD-UPP阳性和CK-UPP阴性的A2780/DDP细胞按不同比例混合后给予5-FC,观察5-FC对混合细胞的杀伤作用.结果当重组腺病毒滴度为100感染复数(MOI)、5-FC浓度为250 μg/ml时,对顺铂耐药的A2780/DDP细胞的存活率为(3.6±1.0)%,对顺铂敏感的A2780细胞的存活率为(76.5±2.8)%,两者比较,差异有显著性(P<0.05).此外,20%CD-UPP阳性A2780/DDP细胞,即可引起80.3%的混合细胞死亡,CD-UPP /5-FC系统表现出明显的旁观者效应.结论由腺病毒介导的含有GSTP1调控的CD- UPP/5-FC系统,对卵巢癌顺铂耐药细胞具有特异性杀伤作用,为临床上克服卵巢癌化疗耐药,提供了一条安全、高效的治疗途径.
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