摘要
目的 探究双氢青蒿素(DHA)与顺铂(DDP)联合应用对耐DDP鼻咽癌细胞株HNE1/DDP增殖抑制和促凋亡的作用及其机制.方法 CCK-8法检测不同浓度DHA(0、5、10、20、40、80、160 μmol/L)和不同浓度DDP(0、4、8、16、32、64、128 μmol/L)处理24 h和48 h后HNE1/DDP细胞的存活率;采用Compusyn软件计算DHA与DDP的联合指数.将HNE1/DDP细胞分为对照组、DHA组、DDP组、DHA联合DDP组,给药处理24 h后,CCK-8、EdU和集落克隆形成实验分别检测细胞活力、细胞增殖和集落克隆形成能力;流式细胞术检测细胞凋亡情况和细胞内活性氧(ROS)水平;Western blotting检测凋亡相关蛋白Cleaved PARP、Cleaved Caspase-9、Cleaved Caspase-3表达水平.ROS抑制剂N-乙酰半胱氨酸预处理后,检测其对DHA联合DDP诱导的细胞增殖、凋亡的影响.结果 不同浓度DHA和不同浓度DDP均能明显抑制HNE1/DDP细胞活力,DHA(5 μmol/L)联合DDP(8、16、32、64、128 μmol/L)的联合指数均小于1.与DHA或DDP单独处理组相比,DHA联合DDP组细胞活力下降(P<0.01),集落形成数和EdU阳性染色细胞减少(P<0.01),细胞凋亡率和细胞内ROS水平升高(P<0.01),细胞凋亡相关蛋白Cleaved PARP、Cleaved Caspase-9、Cleaved Caspase-3的表达水平增加(P<0.05),而N-乙酰半胱氨酸预处理可部分逆转DHA联合DDP对HNE1/DDP细胞的增殖抑制和凋亡诱导作用(P<0.01).结论 DHA增强DDP对HNE1/DDP细胞的增殖抑制和凋亡诱导作用,其机制可能与细胞内ROS的积累有关.
Abstract
Objective To investigate the effect of dihydroartemisinin(DHA)for enhancing the inhibitory effect of cisplatin(DDP)on DDP-resistant nasopharyngeal carcinoma cell line HNE1/DDP and explore the mechanism.Methods CCK-8 method was used to assess the survival rate of HNE1/DDP cells treated with DHA(0,5,10,20,40,80,and 160 μmol/L)and DDP(0,4,8,16,32,64,128 μmol/L)for 24 or 48 h,and the combination index of DHA and DDP was calculated using Compusyn software.HNE1/DDP cells treated with DHA,DDP,or their combination for 24 h were examined for cell viability,proliferation and colony formation ability using CCK-8,EdU and colony-forming assays.Flow cytometry was used to detect cell apoptosis and intracellular reactive oxygen species(ROS).The expression levels of apoptosis-related proteins cleaved PARP,cleaved caspase-9 and cleaved caspase-3 were detected by Western blotting.The effects of N-acetyl-cysteine(a ROS inhibitor)on proliferation and apoptosis of HNE1/DDP cells with combined treatment with DHA and DDP were analyzed.Results Different concentrations of DHA and DDP alone both significantly inhibited the viability of HNE1/DDP cells.The combination index of DHA(5 μmol/L)combined with DDP(8,16,32,64,128 μmol/L)were all below 1.Compared with DHA or DDP alone,their combined treatment more potently decreased the cell viability,colony-forming ability and the number of EdU-positive cells,and significantly increased the apoptotic rate,intracellular ROS level,and the expression levels of cleaved PARP,cleaved caspase-9 and cleaved caspase-3 in HNE1/DDP cells.N-acetyl-cysteine pretreatment obviously attenuated the inhibitory effect on proliferation and apoptosis-inducing effect of DHA combined with DDP in HNE1/DDP cells(P<0.01).Conclusion DHA enhances the growth-inhibitory and apoptosis-inducing effect of DDP on HNE1/DDP cells possibly by promoting accumulation of intracellular ROS.
基金项目
国家自然科学基金(81603155)
安徽省高校自然科学研究重点项目(2022AH051534)
安徽省高校自然科学研究重点项目(KJ2021A0736)
蚌埠医学院自然科学重点项目(2021byzd018)
安徽省大学生创新创业训练项目(S202310367074)
国家科技期刊平台
NSTL
万方数据