[1]黎婕,胡金娇,姜秀星,等.双硫仑/铜复合物通过Drp1去磷酸化和线粒体转位抑制肝癌细胞增殖并诱导细胞凋亡[J].第三军医大学学报,2020,42(23):2302-2310.
 LI Jie,HU Jinjiao,JIANG Xiuxing,et al.Disulfiram/copper complex inhibits proliferation and induces apoptosis in hepatocellular carcinoma cells through dephosphorylation and mitochondrial translocation of Drp1[J].J Third Mil Med Univ,2020,42(23):2302-2310.
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双硫仑/铜复合物通过Drp1去磷酸化和线粒体转位抑制肝癌细胞增殖并诱导细胞凋亡(/HTML )
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《第三军医大学学报》[ISSN:1000-5404/CN:51-1095/R]

卷:
42卷
期数:
2020年第23期
页码:
2302-2310
栏目:
基础医学
出版日期:
2020-12-15

文章信息/Info

Title:
Disulfiram/copper complex inhibits proliferation and induces apoptosis in hepatocellular carcinoma cells through dephosphorylation and mitochondrial translocation of Drp1
作者:
黎婕胡金娇姜秀星高宁
陆军军医大学(第三军医大学)药学与检验医学系生药学与中药学教研室
Author(s):
LI Jie HU Jinjiao JIANG Xiuxing GAO Ning

Department of Pharmacognosy and Traditional Chinese Medicine, Faculty of Pharmacy and Medical Laboratory, Army Medical University (Third Military Medical University), Chongqing, 400038, China

关键词:
 双硫仑二乙基二硫代氨基甲酸铜肝癌细胞凋亡线粒体动力相关蛋白
Keywords:
disulfiram copper(Ⅱ) diethyldithiocarbamate liver neoplasms cell apoptosis dynamin-related protein
分类号:
R735.7; R965.1; R979.19
文献标志码:
A
摘要:

目的研究双硫仑/铜复合物二乙基二硫代氨基甲酸铜[copper(Ⅱ) diethyldithiocarbamate, CuET]对肝癌细胞增殖及凋亡的影响,并探讨其作用机制。方法用不同浓度(0、0.01、0.05、0.10、0.50、1.00、2.00 μmol/L)的CuET处理,CuET(2.00 μmol/L)作用不同时间(0、3、6、9、12、24 h)或Drp1线粒体转位的选择性抑制剂Mdivi-1(1.00 μmol/L)预处理肝癌细胞HepG2、SMMC-7721后,MTT实验检测细胞存活率,软琼脂克隆形成实验确定集落形成,流式细胞术分析细胞凋亡,激光共聚焦检测Drp1线粒体转位,Western blot检测细胞凋亡的相关蛋白cleaved-Caspase 9、cleaved-Caspase 3、cleaved-PARP1、细胞色素C(cytochrome C,cyto C),以及线粒体分裂蛋白phospho-Drp1(S637)、phospho-Drp1(S616)和Drp1的表达。结果CuET对HepG2和SMMC-7721细胞增殖和集落形成的抑制作用呈剂量依赖性(P<0.01);对HepG2和SMMC-7721细胞凋亡诱导作用也有明显的剂量和时间依赖性(P<0.01);Western blot检测结果显示,CuET可导致Caspase 3和Caspase 9的裂解激活,PARP的降解激活以及cyto C从线粒体向细胞质的释放。CuET处理可导致Drp1(S637)去磷酸化和Drp1线粒体转位。细胞经Mdivi-1预处理后可明显阻断CuET诱导的Drp1线粒体转位、Caspase 3的裂解/激活、cyto C的释放以及细胞凋亡。结论双硫仑/铜复合物通过Drp1去磷酸化和线粒体转位抑制肝癌细胞增殖并诱导细胞发生凋亡。

Abstract:

ObjectiveTo determine the effects of disulfiram/copper complex, copper(Ⅱ) diethyldithiocarbamate (CuET) on the proliferation and apoptosis of hepatocellular carcinoma cells, and investigate the molecular mechanisms. MethodsMTT assay was used to detect cell viability in the hepatocellular carcinoma HepG2 and SMMC-7721 cells treated with CuET at the concentrations of 0, 0.01, 0.05, 0.1, 0.5, 1 or 2 μmol/L for 24 h. Then after the HepG2 and SMMC-7721 cells were treated with 2 μmol/L CuET for 0, 3, 6, 9, 12 or 24 h, MTT assay, soft agar assay and flow cytometry were used to determine cell viability, colony formation and cell apoptosis, respectively. And Western blotting was performed to detect the expression of apoptosis-related proteins, including cleaved-Caspase 9, cleaved-Caspase 3, cleaved-PARP1 and cytochrome C, and mitochondrial mitotic proteins, such as phospho-Drp1 (S637), phospho-Drp1(S616), and dynamin-related protein 1 (Drp1). Laser confocal scanning microscopy was carried out to observe the effect of 1 μmol/L Mdivi-1 pretreatment (a selective inhibitor of Drp1 mitochondrial translocation) for 2 h on the mitochondrial translocation of Drp1. Its effects on the apoptosis and expression levels of above proteins were also studied. ResultsCompared with the control cells (0 μmol/L), CuET treatment showed inhibitory effects on the proliferation and colony formation, and inductive effect on the apoptosis in HepG2 and SMMC-7721 cells in dose- and time-dependent manners (all P<0.01). Western blot assay indicated that CuET treatment led to cleavage/activation of Caspase 3 and Caspase 9, degradation of PARP, as well as release of cytochrome C from the mitochondria into the cytoplasm. CuET treatment also caused dephosphorylation and mitochondrial translocation of Drp1 (S637). Mdivi-1 pretreatment obviously blocked the mitochondrial translocation of Drp1, cleavage/activation of Caspase 3, release of cytochrome C, as well as cell apoptosis induced by CuET treatment. ConclusionCuET inhibits the proliferation and promotes apoptosis in hepatocellular carcinoma cells through dephosphorylation and mitochondrial translocation of Drp1.

更新日期/Last Update: 2020-12-04