摘要
目的基于ATP7A探讨粉防己碱对乳腺癌细胞顺铂耐药的逆转作用及机制。方法建立两种人乳腺癌顺铂耐药细胞株及ATP7A高表达细胞。检测粉防己碱对顺铂耐药细胞的逆转作用,高效液相色谱测定胞内顺铂含量,检测ATP7A蛋白表达。结果耐药乳腺癌细胞的顺铂敏感性显著降低(P <0.05),ATP7A表达升高(P <0.05),胞内顺铂含量明显降低(P <0.05);ATP7A高表达细胞较正常乳腺癌细胞顺铂敏感性下降(P <0.05),胞内顺铂含量降低(P <0.05)。而粉防己碱对细胞耐药性具有明显的逆转作用,较耐药细胞及转染细胞可升高胞中顺铂含量(P <0.05),降低ATP7A表达(P <0.05)。结论粉防己碱对人乳腺癌顺铂耐药细胞及ATP高表达细胞的顺铂耐药性有逆转作用,其机制可能与抑制ATP7A表达相关。
Objective To explore the reversal effect and mechanism of tetrandrine for Cisplatin-resistant breast cancer cells based on ATP7 A. Methods Two kinds of human Cisplatin-resistant breast cancer cells lines and cells with high expression of ATP7 A were established to detect the reversal effects of tetrandrine on Cisplatin-resistant breast cancer cells. The intracellular content of Cisplatin was determined by high performance liquid chromatography and the expression of ATP7 A protein was detected. Results The sensitivity of Cisplatin in resistant breast cancer cells was significantly decreased(P < 0.05), the expression of ATP7 A protein was increased(P < 0.05), and the intracellular content of Cisplatin was decreased significantly(P < 0.05); compared with normal breast cancer cells, the sensitivity of Cisplatin in cells with high expression of ATP7 A significantly decreased(P < 0.05), and the intracellular content of Cisplatin was decreased significantly(P < 0.05). Tetrandrine had significant reversal effects for the drug resistance of cells, which could increase the intracellular content of Cisplatin(P < 0.05), and decrease the expression of ATP7 A compared with drug-resistant cells and transfected cells(P < 0.05). Conclusion Tetrandrine has reversal effects for human Cisplatinresistant breast cancer cells lines and cells with high expression of ATP7 A, its mechanism may be related to the inhibition of ATP7 A expression.
引文
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