加热联合黄体酮对人舌癌耐药细胞株Tca8113/BLM耐药性的影响

目的:研究加热(hyperthermia, HT)联合黄体酮(progresterone, Prog)对人舌癌细胞Tca8113和耐药细胞Tca8113/BLM耐药性的影响.方法:采用MTT法检测加热41 ℃ 1 h后联合Prog对人舌癌亲本细胞Tca8113和耐药细胞Tca8113/BLM化疗药物的敏感性;流式细胞仪(FCM)检测细胞内阿霉素(ADM)浓度聚积以及细胞膜上P-gp和MRP的表达.结果:与黄体酮作用细胞相比,加热41 ℃ 1 h联合2 μmol/L Prog作用细胞后,Tca8113和Tca8113/BLM细胞的IC_50显著下降(P<0.01),且各组之间均有显著差异(P<0.01),ADM浓度聚积在2 种细胞中明显增加(P<0.01),细胞膜上的P-gp 和MPR荧光强度显著下降(P<0.01).结论:加热联合Prog能协同增加细胞内药物浓度的聚积,显著提高细胞对化疗药物BLM的敏感性,其二者协同作用与降低细胞膜上的P-gp和MRP的表达有关.

Effect of hyperthermia in combination with progresterone on a human tongue cancer drug-resistance cell line Tca8113/BLM

Objective; To explore the possible effect of hyperthermia combined with Prog on a human tongue cancer cell line Tca8113 and drug-resistance cell line Tca8113/BLM in vitro. Methods;The effect of hyperthermia combined with Prog on Tca8113 and Tca8113/ BLM cells were determined by MTT. The concentration of ADM, the expression of P-gp and MRP were detected by flow cytometry (FCM). Results;Compared with Prog or hyperthermia, the hyperthermia at 41 X. for 1 h combined with Prog showed obvious inhibitory effect in Tca8113 and Tca8113/BLM cells(P<0.01). The concentration of ADM in Tca8113 and Tca8113/BLM cells increased obvi-ously(P<0.01). Expression levels of P-gp and MRP in Tca8113 and Tca8113/BLM cells decreased significantly. Conclusion:The hyperthermia combined with Prog can increase the intracellular concentration of ADM in Tca8113 and Tca8113 /BLM cells, which reverse the drug-resistance of Tca8113/BLM cells to BLM and down-regulate expressions of P-gp and MRP.