首都医科大学学报 ›› 2009, Vol. 30 ›› Issue (6): 780-783.doi: 10.3969/j.issn.1006-7795.2009.06.012

• 慢性丙型肝炎临床研究 • 上一篇    下一篇

角蛋白18在HepG2细胞凋亡中的磷酸化(Ser33,Ser52)及其意义

柳雅立1, 石英2, 马丽娜1, 计云霞2, 魏飞力2, 吴昊2, 陈德喜2, 陈新月1   

  1. 1. 首都医科大学附属北京佑安医院国际医疗部;2. 首都医科大学附属北京佑安医院性病艾滋病实验室
  • 收稿日期:2009-09-22 修回日期:1900-01-01 出版日期:2009-12-21 发布日期:2009-12-21
  • 通讯作者: 陈新月

Phosphorylation of Keratin 18(Ser33, Ser52) in Apoptosis of HepG2 Cells and Its Significance

LIU Ya-li1, SHI Ying2, MA Li-na1, JI Yun-xia2, WEI Fei-li2, WU Hao2, CHEN De-xi2, CHEN Xin-yue1   

  1. 1. International Medicine Ward, Beijing YouAn Hospital, Capital Medical University;2. STD/AIDS Research Laboratory, Beijing YouAn Hospital, Capital Medical University
  • Received:2009-09-22 Revised:1900-01-01 Online:2009-12-21 Published:2009-12-21

摘要: 目的 研究角蛋白18 (keratin18,K18) 在人肝癌细胞HepG2凋亡中的磷酸化情况并分析其意义。方法 以不同浓度的顺铂(cisplatin,CDDP)作用于HepG2细胞,用双标记流式细胞术(Annexin V/PI)染色检测HepG2细胞的凋亡情况,免疫荧光法和蛋白质印迹法检测不同凋亡状态下K18的磷酸化水平。结果 顺铂可以使HepG2细胞发生明显的凋亡,而且凋亡比例随着药物浓度的增加而增加;52位丝氨酸(Ser52)磷酸化水平随着药物浓度增加而增加;33位丝氨酸(Ser33)磷酸化在低浓度药物作用下增加,但在高浓度药物作用下明显减少。结论 Ser33和Ser52磷酸化的K18与HepG2细胞凋亡有密切关系。

关键词: 角蛋白18, 磷酸化, 凋亡

Abstract: Objective To study the phosphorylation of K18 in apoptosis of HepG2 cells and its significance. Methods Apoptosis was induced in HepG2 cells by cisplatin(CDDP). Cells were stained by Annexin V and PI, then analyzed by flow cytometry to evaluate apoptosis. Protein levels of K18 and Ser33, Ser52 phosphorylation of keratin 18 in apoptosis cells were analyzed by immunofluorescence and Western blotting. Results The apoptosis rate of HepG2 cells increased along with the increase of CDDP concentration. The protein level of Ser52 phosphorylated keratin 18 increased along with the concentration of CDDP. The protein level of Ser33 phosphorylated keratin 18 increased with low concentration of CDDP, but decreased evidently with high concentration of CDDP. Conclusion Ser33, Ser52 phosphorylation of keratin 18 has close relationship with apoptosis of HepG2 cells.

Key words: keratin 18, phosphorylation, apoptosis

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