【摘要】 为了进一步阐明人胃腺癌阿霉素耐药细胞系ＢＧＣ－８２３／ＤＯＸ耐药机理和特点，作者应用ＤＮＡ分子杂交、ＲＴ－ＰＣＲ、免疫组化和流式细胞技术进行了ＢＧＣ－８２３／ＤＯＸ多药耐药（ＭＤＲ１）、拓扑异构酶Ⅱα（ＴｏｐｏⅡα）、多药耐药相关蛋白基因的基因扩增、转录、表达分子水平检测以及细胞内阿霉素含量分析。结果表明，ＢＧＣ－８２３／ＤＯＸ亲本细胞具有原发耐药的特性，与消化道肿瘤较为相似。多药耐药是ＢＧＣ－８２３／ＤＯＸ主要的耐药机理。亲本细胞具有原发耐药ＢＧＣ－８２３／ＤＯＸ与亲本无原发耐药的阿霉素耐药细胞系相比，在耐药性质上有显著的差异。更多还原

【Abstract】 To further investigate drug resistance mechanism of BGC 823/DOX,we analysed the amplication,transcription and overexpression of genes associated with drug resistance by Southern blot,RT PCR,immunohisto clogical assay and the concentration of Doxorubicin in the cells by flow cytometry.The results showed that parent cells of BGC 823 were cell line with intrinsic drug resistance similar to the gastrointestinal tumors.Multidrug resistance was the main mechanism of drug resistance in BGC 823/DOX.There was a significant difference between the doxorubicin resistant cells line from parent cells with intrinsic drug resistance and from parent cells without intrinsic drug resistance in drug resistance.更多还原