引用本文: |
-
柴丽,李佳,房林.CKII抑制剂——肝癌治疗新靶点[J].同济大学学报(医学版),2013,34(6):1-5. [点击复制]
- CHAI Li,LI Jia,FANG Lin.CKII inhibitor TBB inhibits proliferation and induces apoptosis of human hepatic cancer HepG-2 cells in vitro[J].同济大学学报(医学版),2013,34(6):1-5. [点击复制]
|
|
摘要: |
目的探讨蛋白激酶(casein kinase 2,cK2)抑制剂影响肝癌细胞株HepG-2凋亡的机制,为其临床治疗肝癌提供可能的实验依据。方法本研究通过MTT法和流式细胞仪检测和观察不同作用时间、不同浓度CK2抑制剂四溴苯三唑(4,5,6,7-tetrabromobenzotriazole,TBB)作用HepG-2肝癌细胞株后对其增殖和凋亡的影响,分别应用荧光定量PCR和Western blot实验分析可能机制。结果TBB在48h浓度为200μmol/L时对肝癌细胞的抑制作用最明显;150~mol/LTBB作用48h后,早期凋亡率明显增高,至(13.2±0.67)%,磷酸化P65在100μmol/LTBB实验组表达下调,而caspase-3、caspase-8、Bcl-2和Bcl—X等在两组间表达未见明显差异。结论CK2抑制剂TBB能够通过参与调控NF—KB信号转导通路抑制肿瘤细胞增殖,促进其凋亡,可能成为未来肝癌治疗的一个新的靶点。 |
关键词: 肝肿瘤 蛋白激酶Ⅱ 四溴苯三唑 凋亡 |
DOI:10. 3969/j. issn1008-0392. 2013. 06. 001 |
|
基金项目:国家自然科学基金(81272240) |
|
CKII inhibitor TBB inhibits proliferation and induces apoptosis of human hepatic cancer HepG-2 cells in vitro |
CHAI Li,LI Jia,FANG Lin |
(Dept. of Breast and Thyroid Surgery, Tenth People's Hospital, Tongji University, Shanghai 200072, China) |
Abstract: |
Objective To investigate the effect of casein kinase 2 ( CK2 ) inhibitor 4,5,6,7- tetrabromobenzotriazole( TBB )on cell proliferation and apoptosis of liver cancer cells. Methods Cultured human hepatic cancer HepG-2 cells were treated with different concentrations of TBB. Cell proliferation and apoptosis were examined with MTT assay and flow cytometry, respectively, mRNAs and proteins of Bcl-2, Bcl-xl, Caspase3, Caspase8, PP65 were detected with real-time fluorescence quantitative PCR (RT-PCR)and Western blot, respectively. Results MTT assay showed that TBB markedly inhibited the proliferation of HepG-2 cells at 48 h on the concentration of 200 p, mol/L. 150 μmol/L TBB increased the percentage of early apoptotic cancer cells to ( 13. 2 ±0. 67 ) %. Compared to controls, mRNA and protein expression of phospho-p65 ( PP65 ) was down-regulated in 100 μmol/L TBB treated groups, while there were no significant differences in caspase-3, caspase-8, Bcl-2 and Bcl-x expression between TBB treatment groups and controls. Conclusion TBB inhibits the proliferation and induces the apoptosis of HepG-2 cells through NF-KB pathway, indicating that CK2 may be a novel therapeutic target for liver cancer. |
Key words: liver cancer protein kinase II TBB apoptosis |