中国癌症杂志 ›› 2020, Vol. 30 ›› Issue (3): 208-216.doi: 10.19401/j.cnki.1007-3639.2020.03.008

• 论著 • 上一篇    下一篇

DJ-1的高表达通过cyclin D1/p53-MDM2-AKT途径促进结直肠癌细胞的增殖、侵袭

朱小坚,林 康,卜凡钦,骆  晨,黄 超,朱正明   

  1. 南昌大学第二附属医院胃肠外科,江西 南昌 330006
  • 出版日期:2020-03-30 发布日期:2020-04-03
  • 通信作者: 朱正明 E-mail: zzm8654@163.com

High expression of DJ-1 promotes growth and invasion of colorectal cancer cells via the cyclin D1/p53-MDM2-AKT signaling pathway

ZHU Xiaojian, LIN Kang, BU Fanqin, LUO Chen, HUANG Chao, ZHU Zhengming   

  1. Department of Gastrointestinal Surgery, the Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, China
  • Published:2020-03-30 Online:2020-04-03
  • Contact: ZHU Zhengming E-mail: zzm8654@163.com

摘要: 背景与目的:研究发现,DJ-1高表达与结直肠癌的临床病理学特征密切相关,但其具体的分子机制并不清楚。探讨DJ-1促进结直肠癌细胞增殖、侵袭与转移的关系及其分子机制研究。方法:通过蛋白质印迹法(Western blot)、实时荧光定量聚合酶链反应(real-time fluorescence quantitative polymerase chain reaction,RTFQ-PCR)、免疫组织化学检测DJ-1在34例结直肠癌患者癌组织样本、癌旁组织中的表达水平。采用EDU、transwell、划痕实验、平板克隆实验检测DJ-1对结直肠癌细胞增殖、侵袭迁徙的影响。采用Western blot、RTFQ-PCR分析DJ-1与cyclin D1/p53-MDM2-AKT信号转导通路之间的关系。结果:Western blot、RTFQ-PCR、免疫组织化学检测结果显示,DJ-1在34例结直肠癌患者的癌组织样本中异常高表达(P<0.001)。体外功能实验证实,DJ-1过表达可促进结直肠癌细胞的增殖、迁移(P<0.01)。Western blot、RTFQ-PCR检测结果显示,DJ-1过表达可抑制p53表达,正向调控cyclin D1进而促进结直肠癌的发生、发展(P<0.05)。结论:DJ-1通过cyclin D1/p53-MDM2-AKT信号通路促进结直肠癌细胞的增殖、迁移和侵袭。

关键词: 结直肠癌, DJ-1, Cyclin D1, p53, 分子机制

Abstract: Background and purpose: The high expression of DJ-1 is closely related to the clinicopathological characteristics in colorectal cancer. However, the more detailed molecular mechanism remains unclear. The aim of the present study was to explore the role of DJ-1 in proliferation, invasion and metastasis of colorectal cancer and its possible molecular mechanism. Methods: The expression of DJ-1 was determined by Western blot, real-time fluorescence quantitative polymerase chain reaction (RTFQ-PCR) and immunohistochemistry in 34 colorectal cancer tissues compared to the corresponding normal tissues. The biological functions of DJ-1 in cell proliferation, invasion and migration were measured by EDU, colony-forming assay, transwell and wound healing assays. In addition, Western blot and RTFQ-PCR were used to analyze the relationship between DJ-1 and cyclin D1/p53-MDM2-AKT signaling pathway. Results: The results of Western blot, RTFQ-PCR and immunohistochemistry showed that DJ-1 was highly expressed in 34 cases of colorectal cancer compared to the corresponding normal tissues (P<0.01). Functional analyses revealed that overexpression of DJ-1 promoted colorectal cancer cell proliferation and migration in vitro. Furthermore, we found overexpression of DJ-1 inhibited the expression of p53 and positively regulated cyclin D1 to promote the progression of colorectal cancer detected by Western blot and RTFQ-PCR. Conclusion: This study indicates that DJ-1 promotes cell proliferation, migration and invasion in colorectal cancer via cyclin D1/p53-MDM2-AKT signaling pathway.

Key words: Colorectal cancer, DJ-1, Cyclin D1, p53, Molecular mechanism