天津医药 ›› 2015, Vol. 43 ›› Issue (11): 1253-1257.doi: 10.11958/j.issn.0253-9896.2015.11.009

• 细胞与分子生物学 • 上一篇    下一篇

雄激素依赖性前列腺癌细胞中雄激素受体上调EphA3 表达#br#

刁小伟, 李园, 皮玉瑞, 李同辉, 刘平, 卢山△#br#   

  1. 1南京师范大学生命科学学院 (邮编 210023); 2南京师范大学江苏省分子医学生物技术重点实验室
  • 收稿日期:2015-04-02 修回日期:2015-06-11 出版日期:2015-11-15 发布日期:2015-11-15
  • 通讯作者: 卢山 E-mail:lu_shan@hotmail.com E-mail:lu_shan@hotmail.com
  • 作者简介:刁小伟 (1988), 男, 硕士在读, 主要从事前列腺癌相关基因转录调控研究
  • 基金资助:
    国家自然科学基金资助项目 (8117200781272850

Androgen receptor up-regulates EphA3 expression in androgen-dependent prostate cancer cell lines#br#

DIAO XiaoweiLI YuanPI YuruiLI TonghuiLIU PingLU Shan△#br#   

  1. 1 College of Life Science, Nanjing Normal University, Nanjing 210023, China; 2 Jiangsu Provincial Key Laboratory of Molecular Medicine, Nanjing Normal University
  • Received:2015-04-02 Revised:2015-06-11 Published:2015-11-15 Online:2015-11-15
  • Contact: LU Shan E-mail:lu_shan@hotmail.com E-mail:lu_shan@hotmail.com

摘要: 目的 探讨雄激素依赖性前列腺癌细胞中促红细胞生成素产生肝细胞 A 型受体(EphA3 表达和雄激素受体 (AR) 信号通路的关联。方法 首先通过逆转录聚合酶链式反应 (RT-PCR) 和蛋白免疫印迹实验 (Western blot分别检测前列腺癌细胞 LNCaP 22Rv1 EphA3 AR mRNA 及蛋白水平, 然后用双氢睾酮(DHT)刺激 48 h测定细胞 EphA3AR 和前列腺特异抗原(PSA)表达水平的变化。同时, 将成功构建的荧光素酶报告基因重组质粒EphA3-Luc-789~+146)与 AR 表达质粒 pcDNA3.1+-AR AR 特异性小分子干扰 RNAsiAR)共转染 22Rv1 胞, 分析 AR EphA3 转录活动的影响。结果 EphA3 在前列腺基质细胞 WPMY-1 中表达水平极低, 但在前列腺癌细胞 LNCaP 22Rv1 中则明显升高, 与 AR 表达模式相似。10 nmol/L DHT 不仅明显上调 22Rv1 细胞中 ARPSAEphA3 表达水平, 也显著升高 LNCaP 细胞中相关基因和蛋白水平。而且细胞内不同 AR 表达水平会显著影响EphA3 启动子活性。结论 AR 通过提高 EphA3 启动子活性上调EphA3 表达水平。

关键词: 促红细胞生成素产生的肝细胞 A 型受体 3, 双氢睾酮, 受体, 雄激素, 前列腺肿瘤, 调节

Abstract: Objective To evaluate the relationship between liver cell type A receptor (EphA) expression and androgen receptor (AR) signaling in androgen- dependent prostate cancer cells. Methods RT- PCR and Western blot assay were used to determine mRNA and protein levels of EphA3 and AR in prostate cancer LNCaP and 22Rv1 cells, respectively. The variations of EphA3, AR and prostate specific antigen (PSA) expressions were also measured in these cells after dihydrotestosterone (DHT) treatment for 48 h. The constructed EphA3-Luc (-789-+146) luciferase reporter plasmid was co-transfected with pcDNA3.1+-AR or siAR in 22Rv1 cells to analyze the effects of different AR expression levels on EphA3 transcription activity. Results The expression pattern of EphA3 was similar to AR, showing a lower level in prostate stromal cell line WPMY-1 and a higher level in prostate cancer cell lines LNCaP and 22Rv1. When stimulated with 10 nmol/L DHT, the expression levels of AR, PSA and EphA3 were significantly increased in 22Rv1 cells, and the protein levels of these genes were also increased in LNCaP cells. Moreover, AR expression levels markedly influenced the activity of EphA3 promoter. Conclusion AR up-regulates EphA3 expression by increasing the activity of EphA3 promoter.

Key words: EphA3, dihydrotestosterone, receptors, androgen, prostatic neoplasms, regulation