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中国临床药理学与治疗学 ›› 2006, Vol. 11 ›› Issue (3): 286-291.

• 研究原著 • 上一篇    下一篇

硒-甲基硒代半胱氨酸对肝癌HepG2 细胞的抑制作用

史传兵, 卢航青, 郑杰   

  1. 东南大学基础医学院病理与病理生理学系,分子病理研究所,南京 210009,江苏
  • 收稿日期:2005-11-03 修回日期:2005-12-15 出版日期:2006-03-26 发布日期:2020-12-04
  • 通讯作者: 郑杰,男,博士,教授,硕士研究生导师,研究方向:分子肿瘤学。Tel:025-83272358 E-mail:jiezheng54@126.com
  • 作者简介:史传兵,男,硕士研究生,研究方向:分子肿瘤学。E-mail:chuanbingshi78@126.com
  • 基金资助:
    江苏省自然科学基金项目(NoBK2005070)

Inhibition on liver carcinoma cells HepG2 by Se-methylselenocysteine

SHI Chuan-bing, LU Hang-qing, ZHENG Jie   

  1. Institute of Molecular Pathology,Department of Pathology and Pathophysiology,School of Basic Medical Science,Southeast University,Nanjing 210009,Jiangsu,China
  • Received:2005-11-03 Revised:2005-12-15 Online:2006-03-26 Published:2020-12-04

摘要: 目的 研究硒-甲基硒代半胱氨酸(Se-methylselenocysteine,MSC)对肝癌HepG2细胞增殖及凋亡的影响,探讨其分子机制。方法: 用不同浓度的MSC处理培养的HepG2细胞,镜下观察细胞的形态学变化,MTT法和流式细胞仪分别检测其对细胞生长和细胞周期的影响,软琼脂生长试验观察瘤细胞恶性表型的变化,并检测细胞周期蛋白D1(CyclinD1)mRNA的表达和半胱氨酸蛋白酶-3(Caspase-3)的活性。结果: 25μmol·L-1的MSC处理HepG2细胞24h后,细胞生长受到明显抑制,出现S期阻滞和细胞凋亡,呈现浓度和时间依赖关系。软琼脂生长试验显示MSC抑制HepG2细胞在软琼脂上的生长能力。RT-PCR和Caspase-3的活性检测显示,25μmol·L-1MSC处理HepG2细胞24、48h后,Cyclin D1 mRNA表达下降了38%和47%,而Caspase-3活性分别升高(39.61±6.65)%和(118.73±6.48)%;50μmol·L-1MSC处理HepG2细胞24、48h后,Cyclin D1 mRNA表达下降了53%和82%,而Caspase-3活性分别升高(80.66±9.31)%和(152.67±7.95)%。结论: MSC抑制HepG2细胞增殖,诱导其凋亡,瘤细胞的恶性程度减弱,这种表型变化与CyclinD1的表达减弱和Caspase-3的活性增强有关。

关键词: 硒-甲基硒代半胱氨酸, HepGHepG2细胞, 细胞凋亡, 细胞周期, 恶性表型

Abstract: AIM: To study the effects of Se-methylselenocysteine(MSC) on the growth and apoptosis of human liver carcinoma cell line,HepG2 cells and the molecular mechanism of effects.METHODS: After HepG2 cells treated with various concentrations of MSC,survival and apoptosis were determined by MTT assay and light microscope,apoptosis and cell cycle were determined by flow cytometry.Malignant phenotype was determined by soft agarose growth assay.Cyclin D1 mRNA expression was determined by RT-PCR and Caspase-3 activity was measured by Caspase-3 activity assay kit.RESULTS: After being treated with 25 μmol·L-1 MSC for 24 h,the survival of HepG2 cells was decreased,a marked apoptosis and S phase arrest characteristic was observed in timeand dose- dependent manner.Soft agatose growth assay showed MSC inhibited HepG2 cells growth in soft agarose.RT-PCR and Caspase-3 assay showed that HepG2 cells treated with 25 μmol·L-1 MSC for 24 and 48 hours,the expression of Cyclin D1 mRNA was down-regulated by 38% and 47%,while Caspase-3 activity was up-regulat-ed by (39.61±6.65)%and (118.73±6.48)%.Hep-G2 cells treated with 50 μmol·L-1 MSC for 24 and 48 h,the expression of Cyclin D1 mRNA was down-regulated by 53% and 82%,whereas Caspase-3 activity was up-regulated by (80.66±9.31)% and (152.67±7.95)%.CONCLUSION: MSC can inhibit the growth of HepG2 cells,and induce apoptosis and S phase arrest of HepG2 cells.The phenotype alterations of HepG2 cells might relate with inhibition of Cyclin D1 expression and Caspase-3activity by MSC in the cells.

Key words: Se-methylselenocysteine, HepG2 cell, apoptosis, cell cycle, malignant phenotype

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