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作 者:张平[1] 董自强[1] 侯毅[1] 袁红纲[1] 董传江[1]
机构地区:[1]三峡大学第一临床医学院宜昌市中心人民医院泌尿外科,湖北宜昌443003
出 处:《中华实验外科杂志》2014年第6期1169-1171,共3页Chinese Journal of Experimental Surgery
基 金:湖北省自然科学基金资助项目(2011CDB329);湖北省宜昌市医疗卫生科技计划资助项目(A01301-12)
摘 要:目的探讨蜂毒素对膀胱癌细胞株T24细胞周期的作用及其相关调控机制。方法体外培养膀胱癌T24细胞,经0、7.5、10.0、12.5mg/L的蜂毒素分组处理后用流式细胞术检测细胞周期,Western blot检测细胞周期蛋白A(Cyclin A)、周期蛋白依赖性激酶2(CDK2)、CDK抑制因子p21cipl和细胞周期蛋白依赖性激酶抑制蛋白27(p27^kipl)的蛋白表达变化。结果膀胱癌T24细胞经不同浓度的蜂毒素处理后各组对应的S期细胞比例分别为(25.73±2.11)%、(31.57±1.91)%、(45.37±0.74)%、(53.67±1.12)%,药物处理组与对照组比较差异有统计学意义(P〈0.01);T24细胞中p21cipl和p27^kipl的蛋白表达水平数据增高(p21^cipl:0.1561±0.0116、0.2092±0.0108、0.2879±0.0129、0.3518±0.0130;p27^kipl:0.2503±0.0123、0.3421±0.0123、0.4003±0.0099、0.4692±0.0130),而Cyclin A和CDK2的蛋白表达则明显降低(Cyclin A:0.9507±0.0178、0.8706±0.0119、0.8065±0.0120、0.7267±0.0184;CDK2:0.9654±0.0145、0.8683±0.0153、0.7554±0.0085、0.6526±0.0183),与对照组比较差异均有统计学意义(P〈0.01)。结论蜂毒素可导致T24细胞发生S期阻滞,其机制可能与其下调CyclinA和CDK2的表达,但上调p21^cipl与p27^kipl的表达有关。Objective To investigate the effects of melittin on the cell cycle of bladder cancer cell line T24 and the related regulatory mechanisms. Methods In vitro cultured bladder cancer T24 cells were treated with melittin (0, 7. 5, 10. 0, and 12. 5 mg/L). Flow cytometry was applied to examine the cell cycle of T24 cells. Western blotting method was applied to detect the protein expression of Cyclin A, cyclindependent kinase 2 ( CDK2 ), CDK inhibitor p21^tipl and cyclin dependent kinase inhibitor protein 27 ( p27^kipl ). Results Corresponding to different concentration groups of melittin, the proportion of T24 cells in S phase was (25.73 ±2.11)%, (31.57±1.91)%, (45.37±0.74)%, and (53.67±1.12)%, showing significant difference between melittin-treated groups and control group ( P 〈 0. 01 ). The protein expression of p21^cipl and p27^kipl in mclinin-treated T24 cells was increased (p21^cipl :0. 156 1 ±0. 011 6, 0. 209 2 ±0. 010 8,0. 287 9 ±0. 012 9,0. 351 8 ±0. 013 0;p27^kipl:0. 250 3 ±0. 012 3,0. 342 1 ±0. 012 3, 0. 400 3±0. 009 9,0. 469 2 ±0. 013 0), while that of Cyclin A and CDK2 significantly decreased as compared with control group ( Cyclin A :0. 950 7 ± 0. 017 8,0. 870 6 ± 0. 011 9,0. 806 5 ± 0. 012 0,0. 726 7 ± 0. 018 4 ; CDK2:0. 965 4 ± 0. 014 5,0. 868 3 ± 0. 015 3,0. 755 4 ± 0. 008 5,0. 652 6 ± 0. 018 3 ,P 〈 0. 01 ). Conclusion Melittin can cause S phase arrest of T24 cells, which may be associated with the down-regu-lation of Cyclin A and CDK2 expression while up-regulation of p21^cipl and p27^kipl.
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