【摘 要】
：
In order to investigate the effects of vector-based hairpin small interference RNA (shRNA) on the reversal of multi-drug resistance (mdr) of A2780/Taxol cells,
【机 构】
：
Department of Obstetrics and Gynecology,Department of Thoracic and Cardiac Surgery
【出 处】
：
华中科技大学学报（医学）（英德文版）
【基金项目】
：
Scientific Research Foundation of Hubei Health Department;国家自然科学基金;Key Technologies R&D Programme of Hubei Province, China
论文部分内容阅读
In order to investigate the effects of vector-based hairpin small interference RNA (shRNA) on the reversal of multi-drug resistance (mdr) of A2780/Taxol cells, a novel vector pEGFP-H1/mdr1 containing mdr1-shRNA targeting at position 2943-2963 of mdr1 was designed and synthesized.Subsequently, A2780/Taxol cells were transfected with pEGFP-H1/mdrl, and the expression of mdr1 mRNA and P-gp was detected by using RT-PCR and Western blot respectively. MTT was used to measure the 50% inhibition concentration (1C50) of Taxol to A2780/Taxol cells. The results showed that at the 24th and 48th h after transfection, the expression of mdr1 mRNA was decreased to (52.1±1.0)% and (0.01+1.7)%, and that of P-gp decreased to (88.3±2.1)% and 0%, respectively. At the 48th h after transfection, the relative reversal rate of A2780/Taxol cells to Taxol was 69.54%. In vivo, the nude mice xenografts were injected with pEGFP-H1/mdrl, and then administrated Taxol.The tumor volume in pEGFP-H1/mdr1-transfected group was significantly reduced as compared with that in blank control group or pEGFP-H1-transfected group (807.20±103.16 vs 1563.78±210.54 or 1480.78±241.24 mm3, both P
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