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作 者:张珂[1] 王萍[1] 张庆[2] 于东红[1] 陈昌杰[3] 承泽农[1] 李柏青
机构地区:[1]蚌埠医学院第一附属医院病理科蚌埠医学院病理学教研室,安徽蚌埠233030 [2]蚌埠医学院第一附属医院中心实验室,安徽蚌埠233004 [3]蚌埠医学院生物化学与分子生物学教研室,安徽蚌埠233030 [4]安徽省感染与免疫重点实验室,安徽蚌埠233030
出 处:《蚌埠医学院学报》2009年第5期379-383,共5页Journal of Bengbu Medical College
摘 要:目的:研究槲皮素(quercetin,QUE)抑制人胃癌BGC-823细胞增殖和诱导凋亡的作用。方法:采用四甲基噻唑氮蓝(methyl thiazolyl tetrazolium,MTT)比色法检测不同终浓度的QUE对BGC-823细胞增殖的影响及其细胞毒活性,流式细胞术(FCM)对不同浓度的QUE作用24h的BGC-823细胞进行凋亡检测及其周期分析.用免疫组化法测定Bcl-2、caspase-3的表达率。结果:QUE对体外培养的BGC-823细胞具有明显的增殖抑制作用,在30~120μmol/L范围内可显著抑制BGC-823细胞增殖,且呈剂量-时间依赖性。FCM检测后,BGC-823细胞周期阻滞于S期,药物浓度呈正相关。经QUE处理后BGC-823细胞株caspase-3蛋白表达明显增加,Bcl-2蛋白表达降低。免疫组化检测表明,用药组Bcl-2蛋白的表达下降,easpase-3蛋白的表达率增强,与对照组相比差异有统计学意义(P〈0.01)。结论:QUE诱导BGC-823细胞发生凋亡,使细胞周期阻滞于S期,抑制增生与诱导凋亡的机制可能与下调Bcl-2、上调caspase-3蛋白的表达有关。Objective:To study the influence of quercetin (QUE) on the growth and apoptosis of human gastric carcinoma cell line BGC-823. Methods:Methyl thiazolyl tetrazolium (MTT) assay was used to determine the influence of different concentrations of QUE on the cell proliferation of BGC-823 ;the change of cell cycle and apoptosis was observed by flow cytometry (FCM) after the cells were treated with different concentrations of QUE for 24 h ; the positive expression rate of Bcl-2 and caspase-3 were detected by immunocytochemieal staining. Results: QUE at concentrations ranging from 30μmol/L to 120μmol/L significantly inhibited the proliferation of BGC-823 cells in a dose-and-time-dependent manner(P 〈 0.01 ). FCM analyses showed that QUE arrested BGC-823 cells at the S phase. Expression of Bcl-2 protein decreased following QUE induction in a dose-dependent manner, whereas easpase-3 expression increased significantly compared with that of the control group ( P 〈 0.01 ). Conclusions : QUE can inhibit the growth and induce apoptosis of BGC-823 cells,keeping the cell cycle at S phase. Its mechanisms may be relevant to the down- regulation of Bcl-2 protein expression as well as the up-regulation of caspase-3 expression.
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