藏花素对膀胱移行细胞癌T24细胞增殖和凋亡的影响及作用机制研究  

Proliferation apoptotic influence of crocin on human bladder cancer T24 cell line

作　　者：赵培[1] 罗春丽[1] 吴小候[2] 胡宏波[1] 吕纯芳[1] 冀慧莹[1] 

机构地区：[1]重庆医科大学医学检验系临床检验诊断学省部共建教育部重点实验室,重庆400016 [2]重庆医科大学附属第一医院泌尿科,重庆400016

出　　处：《中国中药杂志》2008年第15期1869-1873,共5页China Journal of Chinese Materia Medica

基　　金：重庆市科委自然科学基金(CSCT2005BB5309)

摘　　要：目的:研究藏花素(crocin)对膀胱移行细胞癌(TCCB)增殖、凋亡的影响及作用机制。方法:用crocin处理后,四甲基偶氮唑盐(MTT)法分析其对T24细胞增殖的影响;流式细胞术检测T24细胞周期动力学和凋亡诱导率。建立人膀胱癌T24细胞株裸鼠移植瘤动物模型。随机分为对照组和处理组。50 mmol.L-1crocin处理后,观察其对肿瘤的抑制作用;电镜观察肿瘤组织形态改变;SP-免疫组织化学法分析Bcl-2,Bax,survivin,Cyclin D1蛋白表达。结果:Crocin能明显抑制人膀胱癌T24细胞的生长,并使T24细胞呈明显的G0/G1期阻滞现象;T24细胞早期凋亡率随crocin作用时间的延长而逐渐增加。Crocin对人膀胱癌裸鼠移植瘤的生长具有抑制作用,电镜观察可见细胞凋亡的形态学改变,免疫组化结果显示,经Crocin处理后Bcl-2,survivin,Cyclin D1的表达下调,而Bax的表达上调。结论:Crocin对人膀胱癌T24细胞株的体内外增殖均具有良好的抑制作用,其机制可能是改变细胞周期分布和诱导细胞凋亡,作用机制与下调Bcl-2,survivin,Cyclin D1基因表达和上调Bax的基因表达有关。Objective： To investigate the proliferation, apoptosis and mechanisms on T24 cell of transitional cell carcinoma of bladder （TCCB） by crocin. Method： MTT assay was used to evaluate the proliferation of T24 cells. The changes of cell cycle and cell apoptotic percentage were measured by flow cytometry. T24 cells were inoculated into BALB/c nude mice to establish model of carcinoma of bladder. The mice were randomly divided into control group and experimental group. After treatment with 50 mmol · L ^-1 crocin, the inhibited growth of tumor was observed. Electronic microscope was used to observe the morphological changes. The expressions of Bcl-2, Bax, Survivin and Cyclin D1 were detected by immunohistochemistry. Result： The growth of T24 cells was remarkably inhibited after treatment of crocin. Flow cytometric profiles revealed that crocin led to the increase of the cells in G0/G1 phase, the percentage of cell apoptosis was also increased. Crocin could inhibit the growth of BALB/c xenograft tumor. The morphology changes of cell apoptosis were observed. Bcl-2, Cyclin D1 and survivin expressions determined by immunohistochemical staining were down-regulated after treat- ment with Bax expression up-regulated. Conclusion： Crocin exerts both in vitro and in vivo anti-cancer effect on TCCB T24 cell line. The mechanisms may change tumour cell cycle and induce tumour cell apoptosis by down-regulating the expression of Bcl-2, Survivin, Cyclin D1 and up-regulating the expression of Bax.

关 键 词：藏花素 膀胱癌 细胞凋亡 细胞周期 

分 类 号：R285.5[医药卫生—中药学]