J4 ›› 2010, Vol. 36 ›› Issue (6): 1098-1101.

• 基础研究 • 上一篇    下一篇

E6-AP在前列腺癌LNCaP细胞基因表达调控中的作用

 杜培革1, 韩笑1, 梁骥1, 李贺1, 安丽萍1, 徐广宇1, 傅桂莲2     

  1. 1. 北华大学药学院微生物与生化教研室|吉林 吉林 132013;2. 美国迈阿密大学米勒医学院分子药学和细胞药学教研室|美国 佛罗里达 33124
  • 收稿日期:2010-07-08 出版日期:2010-11-28 发布日期:2010-11-28
  • 通讯作者: 杜培革(Tel: 0432-64608278,E-mail: dupeige2001@126.com) E-mail:dupeige2001@126.com
  • 作者简介:杜培革(1963-)|女|吉林省吉林市人|教授|医学博士|主要从事生物活性分子功能的研究。
  • 基金资助:

    吉林卫生厅重点项目资助课题(200599)

Regulatory role of E6-AP in gene expression in prostate cancer LNCaP cells

 DU Pei-Ge1, HAN Xiao1, LIANG Ji1, LI He1, AN Li-Ping1, XU Guang-Yu1, FU Gui-Lian2   

  1. 1. Department of Micrology and Biochemistry,School of Pharmacy,Jilin 132013,China;2. University of Miami Miller School of Medicine,Florida 33124|USA
  • Received:2010-07-08 Online:2010-11-28 Published:2010-11-28

摘要:

目的:探讨前列腺癌LNCaP细胞中E6相关蛋白(E6-AP)对雄激素受体(AR)和丝苏氨酸激酶(Akt)表达的调节作用,阐明E6-AP的作用机制。方法:应用双稳定表达的人前列腺癌细胞株LNCaP/E6-AP细胞,通过Western blotting分析E6-AP过表达对细胞中AR和Akt蛋白表达水平的影响;利用免疫荧光技术观察E6-AP与AR在细胞中的定位关系。结果:与E6-AP低表达的LNCaP细胞比较,E6-AP过表达的LNCaP细胞中AR蛋白和磷酸化的AR蛋白的表达量明显降低(P<0.05);Akt蛋白和磷酸化的Akt蛋白的表达量明显升高(P<0.01)。免疫荧光法检测结果显示:E6-AP和AR在细胞中定位情况相似。结论:E6-AP过表达可下调AR蛋白和磷酸化AR蛋白的表达,并上调Akt蛋白及磷酸化Akt蛋白的表达,且E6-AP与AR在细胞中定位基本一致,E6-AP可能与前列腺癌的发生和发展密切相关。

关键词: 雄激素受体;E6相关蛋白;丝苏氨酸激酶

Abstract:

To investigate the regulatory role of E6-associated protein(E6-AP) in anadrogen receptor(AR) and AKT expressions in prostate cancer LNCaP cells and its mechanism. Methods  LNCaP cells stably transfected with E6-AP were used to analyze the regulatory role of E6-AP in AR and AKT expressions by Western blotting assay,the  intracellular localization of E6-AP and AR was determined by immunofluorescence. Results Compared with LNCap cells with low E6-AP expression, the total AR and phosphorylated-AR expression levels in the  LNCaP cells with high E6-AP expression were significantly decreased(P<0.05),the  total Akt and phosphorylated-Akt expression levels were significantly increased(P<0.01).The immunofluorescence results demonstrated that E6-AP showed a similar intracellular location with AR in the LNCaP cells.  Conclusion Overexpression of E6-AP could down-regulate the protein level of total AR and phosphorylated-AR,whereas up-regulate the protein level of total Akt and phosphorylated-Akt. E6-AP shows colocalization with AR in the LNCaP cells.

Key words: androgen receptor;E6-associated protein;serine/threonine protein kinase

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