联合应用华蟾素与氟尿嘧啶对胃癌细胞增殖抑制及诱导凋亡的作用

目的 探讨单一华蟾素体外对人胃癌细胞的增殖抑制和诱导凋亡作用以及与5-氟尿嘧啶（5-FU）联合应用对胃癌细胞的影响.方法 实验分为对照组;华蟾素（cino）组;5-FU组和cino＋5-FU组.利用体外细胞培养、倒置显微镜和荧光显微镜、MTT比色技术及流式细胞仪等方法,观察细胞形态,检测cino和5-FU对人胃癌细胞株BGC823细胞抑制率、细胞凋亡和细胞周期.结果 cino对人胃癌细胞有显著的增殖抑制作用,呈时间剂量依赖性.cino＋5-FU对BGC-823细胞的增殖抑制率显著高于单独使用组（P＜0.05）.定量分析显示cino＋5-FU组的凋亡细胞发生率显著高于cino组和5-FU组（P＜0.05）.cino＋5-FU可使G0/G1期细胞比例降低,S期细胞比例升高,且大多数被阻滞于S期.结论 cino对胃癌BGC-823细胞具有增殖抑制和诱导凋亡作用,与5-FU联用可显著提高后者的化疗效果,且呈时间剂量依赖关系.

The effect of cinobufacin combined with 5-FU on inhibiting proliferation and inducting apoptosis of human gastric carcinoma cells

Objective To study the effects of cinobufacin(cino) combined with fluorouracil(5-FU) on inhibiting proliferation and inducing apoptosis of human gastric carcinoma cells in vitro. Methods The experiment was divided into control group,cinobufacin group,5-FU group and cino+5-FU group. Cell morphological variation,cell inhibitory rate, cell cycle and ratio of apoptotic cell of human gastric carcinoma cell line BGC-823 were studied by cell culture, inverse microscopy, fluoroscopy, MTT assay and flow cytometry on different concentrations of cino and 5-FU. Results Cino could markably inhibit proliferation of human gastric carcinoma cells in time-and dose-dependent response. The cino+5-FU group inhibited the rate of proliferation of BGC-823 cells was significantly more than either cino or 5-FU alone group(P< 0.05). The quantitative analysis showed the same result. Cino+5-FU can decrease the proportion of G_0/G_1 phase and increase of S phase in cell cycle. Most of the cells were arrested in the S phase. Conclusions Cino has the effect of inhibition on the proliferation and induction of apoptosis in human BGC-823 gastric carcinoma cell. Cino combined with 5-FU could enhance the antineoplastic effect of 5-FU, and showed time-and dose-dependent response.