摘要
目的探讨JAKs/STATs信号转导通路在二烯丙基二硫(DADS)诱导人白血病HL60细胞分化中的变化及其调控机制。方法将HL60细胞与DADS或JAKs/STATs信号通路的激酶抑制剂AG490在体外共同培养,观察细胞形态变化,检测药物作用前后细胞NBT还原能力及细胞表面分化抗原CD11b的改变;用Westernblot检测JAKs,STATs各家族成员在DADS诱导HL60细胞分化中的改变;并用免疫细胞化学法检测核转录基因STATs,cmyc,cfos,cjun的表达变化。结果DADS和AG490均可诱导HL60细胞向成熟粒系分化,且DADS在1.25mg·L-1时诱导分化作用达峰值;Westernblot检测JAK1,STAT3的酪氨酸激酶发生了磷酸化改变;免疫细胞化学示STAT3与cmyc基因蛋白核内表达下降,cjun,cfos基因蛋白核内表达上升。结论JAK1,STAT3酪氨酸激酶的磷酸化抑制参与了DADS诱导HL60细胞分化的调控,其机制可能通过调控与HL60细胞增殖分化相关的基因表达,抑制细胞DNA合成,从而抑制细胞增殖,诱导分化。DADS的作用相当于JAK1/STAT3信号通路的阻断剂。
Aim To investigate JAKs/STATs signal transduction change in HL-60 cells differentiation induced by diallyl disulfide(DADS)and molecular mechanism regulating the differentiation.Methods After incubation of HL-60 cells with DADS or AG490(50 μmol·L -1),the cell differentiation indexes were observed by cytomorphology, NBT reduction ability assay,cell myeloid differentiation antigen CD11b by flow cytometry. Kinase activity of JAKs/STATs was tested by western-blotting and expressions of nucleus transcription genes stats,c-myc,c-fos,c-jun were detected by immumocyte chemistry method.Results Cell differentiation index changes indicated that HL-60 cells were induced differentiation toward granulocytic lineage by DADS, Western blot test demonstrated that constitive phosphorylation of Jak1,stat3 kinase was suppressed. Stat3,c-myc gene expression decreased and c-fos, c-jun gene expression increased in HL-60 cells treated with DADS through immunocyte chemistry.Conclusion Inhibition of phosphative Jak1, Stat3 was involved in HL-60 cells differentiation induced by DADS, its molecular mechanism might be related to modulation of gene expression associated proliferation and differentiation,and inhibition of DNA systhesis, induction differentiation.
出处
《中国药理学通报》
CAS
CSCD
北大核心
2005年第5期580-583,共4页
Chinese Pharmacological Bulletin
基金
湖南省卫生厅重点科研基金资助项目(No00068)
湖南省教育厅科研基金资助项目(No02C394
03C415
04B057)