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顺铂作用于耐顺铂卵巢上皮癌细胞后其细胞生物学特性的改变 被引量:5

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摘要 目的:探讨耐顺铂卵巢癌SKOV3/DDPⅡ细胞对于顺铂作用后其细胞周期、凋亡、增殖及铂类耐药相关基因ARHGDIB和CCND1表达量的变化。方法:采用流式细胞术检测不同浓度和时间顺铂作用后SKOV3/DDPⅡ细胞周期和凋亡率的变化,并与标记GFP的上皮性卵巢癌细胞株SKOV3-GFP(敏感株)相比较;通过3-(4,5-二甲基噻唑-2)-2,5-二苯基四氮唑溴盐(MTT)法检测不同浓度和时间顺铂作用后细胞增殖的变化;实时荧光定量PCR(QRT-PCR)检测裸鼠体内瘤块耐药基因CC-ND1和ARHGDIB基因的表达情况。结果:半抑制浓度的顺铂作用48h后,SKOV3-GFP和SKOV3/DDPⅡ两株细胞分布于G0/G1期的比例相对于无顺铂处理组明显下降(P<0.01,P<0.05),SKOV3/DDPⅡ细胞分布于G2/M期的比例则相对于无顺铂处理组明显升高(P<0.01);而顺铂作用48h内SKOV3-GFP和SKOV3/DDPⅡ两株细胞凋亡率随时间和浓度的增大而增大;以9.9,19.8,29.7μmol/L浓度的顺铂处理6d以后,SKOV3/DDPⅡ的增殖抑制得到解除,并继续生长,而SK-OV3-GFP细胞则随顺铂作用时间延长增殖持续受到抑制。顺铂作用体内移植瘤5次后,CCND1在SKOV3/DDPⅡ-5的相对表达比SKOV3/DDPⅡ-0增高92.98倍,作用第8次后,ARHGDIB在SKOV3/DDPⅡ-8的相对表达比SKOV3/DDPⅡ-0增高2.51倍。结论:具有耐药表型的卵巢上皮癌细胞在顺铂作用下降低分布于G0/G1期细胞数使细胞生长受到一定程度的抑制,但在顺铂刺激后肿瘤细胞过度表达CCND1基因使细胞顺利通过G1/S检查点促进肿瘤细胞增殖,同时上调表达ARHG-DIB基因抵抗顺铂诱导的肿瘤细胞凋亡。
出处 《广西医科大学学报》 CAS 2013年第1期33-37,共5页 Journal of Guangxi Medical University
基金 广西医学科学实验中心开放基金资助项目(KFJJ2010-3)
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