雷公藤内酯醇诱导MUTZ-1细胞凋亡及其机制研究

被引:5
作者
邓晶
金洁
机构
[1] 浙江大学医学院附属第一医院血液科,浙江省血液病研究所,浙江大学医学院附属第一医院血液科,浙江省血液病研究所杭州,杭州所长、主任,教授,博士生导师
关键词
雷公藤内酯醇; 骨髓增生异常综合征; 细胞凋亡; caspase-3; PARP,c-IAP2;
D O I
暂无
中图分类号
R285 [中药药理学];
学科分类号
1008 ;
摘要
为了探讨雷公藤内酯醇(triptolide)诱导骨髓增生异常综合征(MDS)细胞系MUTZ1细胞凋亡及其作用机制,将triptolide与MUTZ1细胞共育,采用MTT法观察细胞生长,DNA片段化分析和AnnexinVFITC/PI双染色流式细胞仪检测细胞凋亡,RTPCR及Westernblot方法检测基因和蛋白质水平。结果表明:triptolide对MUTZ1细胞具有明显的生长抑制作用,呈量效与时效关系,24小时半数抑制率(IC50)为55.06ng/ml;triptolide能诱导MUTZ1细胞DNA断裂产生DNAladder,且能诱导MUTZ1细胞磷脂酰丝氨酸转位,其发生率随药物浓度增加而增加;triptolide作用于MUTZ1细胞12小时导致caspase3激活,PARP酶解及cIAP2mRNA表达水平下调,凋亡率与caspase3原酶及cIAP2表达量呈负相关(r=-0.907,P=0.000;r=-0.919,P=0.000)。结论:triptolide能通过诱导凋亡抑制MUTZ1细胞的生长,triptolide诱导MUTZ1细胞凋亡是通过caspase3激活及PARP酶解所介导的,且caspase3的激活可能与凋亡蛋白抑制因子cIAP2的下调有关。
引用
收藏
页码:434 / 439
页数:6
相关论文
共 8 条
[1]  
Mechanism of immunosuppression of the antirheumatic herb TWHf in human T cells. Ho LJ,Chang DM,Chang ML,et al. The Journal of Rheumatology . 1999
[2]  
Immunosuppressant PG490( triptolide) induces apoptosis through the activation of caspase-3 and down-regulation ofX IAP in U937 cells. Choi YJ,K im TG,K im YH,et al. Biochemcal Pharmacology . 2003
[3]  
Triptolide down-regulates bcr-abl expression and induces apoptosis in chronic myelogenous leukem ia cells. Lou YJ,Jin J. Leukemia and Lymphoma . 2004
[4]  
Triptolide induced cytotoxic effects on human promyelocytic leukem ia, T cell lymphoma and human hepatocellular carcinoma cell lines. Chan EW,Cheng SC,Sin FW,et al. Toxicology Letters . 2001
[5]  
Translation of cellular inhibitor of apoptosis protein 1 ( c-IAP1 ) mRNA is IRES mediated and regulated during cell stress. Van-Eden ME,ByrdMP,SherrillKW,et al. Rádio Nacional de Angola . 2004
[6]  
Myelodysplastic syndrome. Greenberg PL,Young NS,Gattermann N. Hematology . 2002
[7]  
X-linked IAP is a direct inhibitor of cell-death proteases. Deveraux QL,Takahashi R,Salvesen GS,et al. Nature . 1997
[8]  
Antineoplastic action of triptolide and its effect on the immunologic functions in m ice. Zhang TM,Chen ZY,Lin C. Acta Pharmacological Sinica . 1981