微囊藻毒素-LR对中国仓鼠卵巢细胞凋亡的影响  被引量:4

Effect of apoptosis induced by microcystin-LR in Chinese hamster ovary cells

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作  者:付余[1] 杨明峰[2] 易丹[2] 程学敏[2] 刘伟[1] 崔留欣[2] 张慧珍[2] 

机构地区:[1]郑州大学药学院,河南郑州450001 [2]郑州大学公共卫生学院

出  处:《环境与健康杂志》2012年第8期708-710,共3页Journal of Environment and Health

基  金:河南省科技攻关项目(102102310110);河南省基础与前沿技术项目(112300410070)

摘  要:目的研究微囊藻毒素-LR(MC-LR)致中国仓鼠卵巢(CHO)细胞的凋亡作用。方法调整CHO细胞密度约为1×105/ml,分别用终浓度为0(对照)、1、5、10、15μg/ml的MC-LR染毒24 h后,采用噻唑兰(MTT),法测细胞活性,计算半致死效应浓度(EC50)。分别用终浓度为0(对照)、2.5μg/m(l1/4 EC50)、5μg/m(l 1/2 EC50)、10μg/m(lEC50)的MC-LR染毒24 h后,测定活性氧(ROS)含量、线粒体膜电位、天冬氨酸特异性半胱氨酸蛋白酶-3(caspase-3)的活力和细胞凋亡率。结果与对照组相比,各浓度MC-LR染毒组CHO细胞内ROS含量、caspase-3活力和细胞凋亡率均较高,线粒体膜电位降低,差异均有统计学意义(P<0.05);且随着MC-LR染毒浓度的升高,CHO细胞内ROS含量、caspase-3活力和细胞凋亡率均呈上升趋势,线粒体膜电位呈下降趋势。结论 MC-LR暴露可诱导体外培养的CHO细胞发生凋亡。Objective To study the effect of apoptosis induced by microeystin-LR (MC-LR) in Chinese hamster ovary (CHO) cells. Methods CHO cell density was adjusted to 1 ×10^5/ml, and treated with different concentrations of MC-LR (0,1,5,10,15 μg/ml) for 24 h. MTr method was used to measure cell survival rates ,and the haft maximal effective concentration (EC50) was calculated. After treatment with 0(control), 2.5 μg/ml (1/4 EC50) ,5 μg/ml(1/2 EC50), 10 μg/ml(EC50) MC-LR for 24 h,reactive oxygen species(ROS), mitochondrial membrane potential(MMP), caspase-3 activity, the apoptosis rate in CHO cells were measured. Results In each concentration group, intracellular ROS generation, caspase-3 activity, cell apoptosis rate increased and MMP decreased significantly compared with the control group(P〈0.05). In addition, with the increases of MC-LR concentration, ROS content, caspase-3 activity, the apoptosis rate in CHO cells increased and MMP decreased. Conclusion Exposure to MC-LR may induce apoptosis in CHO cell in vitro.

关 键 词:微囊藻毒素-LR 中国仓鼠卵巢细胞 活性氧 线粒体膜电位 细胞凋亡 天冬氨酸特异性半胱氨酸蛋白酶-3 

分 类 号:R994.6[医药卫生—毒理学]

 

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