实用医学杂志 ›› 2022, Vol. 38 ›› Issue (22): 2768-2779.doi: 10.3969/j.issn.1006⁃5725.2022.22.002

• 基础研究 • 上一篇    下一篇

周期蛋白依赖激酶抑制因子3通过调控G2/M 期检查点促进肝内胆管癌细胞生长并降低对顺铂的敏感性

朱志文 阳亮芳 郑杨 黄海丽 何惠娟   

  1. 广东医科大学附属医院肝胆外科(广东湛江 524001)

  • 出版日期:2022-11-25 发布日期:2022-11-25
  • 通讯作者: 何惠娟 E⁃mail:hehjuan@gdmu.edu.cn
  • 基金资助:
    国家自然科学基金(编号:81600484);广东省自然科学基金(编号:2018A030307066)

CDKN3 reduces the sensitivity of intrahepatic cholangiocarcinoma cells to cisplatin by regulating G2/M checkpoint

ZHU Zhiwen,YANG Liangfang,ZHENG Yang,HUANG Haili,HE Huijuan.   

  1. Department of Hepato⁃ biliary Surgery,the Affiliated Hospital of Guangdong Medical University,Zhanjiang 524001,China

  • Online:2022-11-25 Published:2022-11-25
  • Contact: HE Huijuan E⁃mail:hehjuan@gdmu.edu.cn

摘要:

目的 探究周期蛋白依赖激酶抑制因子 3(CDKN3)在肝内胆管癌中的表达和产生的影响, 及其发挥作用的分子机制。方法 生物信息学和免疫组化分析 CDKN3 的表达情况;将 CDKN3 干扰质粒、 CDKN3 过表达质粒和阴性对照质粒转入肝内胆管癌细胞系(HCCC⁃9810)并通过 Western blot 检测转染效 果;通过克隆实验和划痕实验检测 HCCC⁃9810 细胞的增殖和迁移能力;Western blot 检测相关通路蛋白表 达情况;细胞周期实验分析处于各个时期的细胞比例。结果 与正常组织相比,CDKN3 在胆管癌组织中 呈高表达(P < 0.05);KEGG GO 富集分析显示 CDKN3 与细胞周期 G2/M 期检查点密切相关;干扰 CDKN3 后,诱导HCCC⁃9810细胞G2/M期阻滞,导致增殖和迁移能力减弱(P < 0.05);进一步研究发现,沉默CDKN3 可下调 CDC25C/CDK1 轴活性,导致 CDK1 低活性的磷酸化水平增高;此外,CDKN3 过表达可显著降低 HCCC⁃9810 细胞对顺铂的敏感性(P < 0.05)。结论 CDKN3 在胆管癌组织中被显著上调,CDKN3 可能通 过调控G2/M 期检查点相关蛋白的表达,从而参与到肝内胆管癌的发生发展和化疗耐药。

关键词:

肝内胆管癌, CDKN3, 细胞周期, 化疗耐药

Abstract:

Objective To investigate the expression and effect of CDKN3 in intrahepatic cholangiocarcinoma and its molecular mechanism. Methods The expression of CDKN33 was analyzed by bioinformatics and immuno⁃ histochemistry. CDKN3 interference plasmid,CDKN3 overexpression plasmid and negative control plasmid were transferred into intrahepatic cholangiocarcinoma cell line(HCCC⁃9810)and the transfection effect was detected by western blot. Proliferation and migration ability of HCCC⁃9810 cells were detected by colony formation experiment and healing experiment. The expression of related pathway proteins was detected by western blot. Cell cycle asssay was used to analyze the proportion of cells at various stages. Results CDKN3 was highly expressed in cholangio⁃ carcinoma when compared with that in normal tissues(P < 0.05). KEGG and GO enrichment analysis showed that CDKN3 was closely related to G2/M checkpoint of cell cycle. Interfering CDKN3 induced G2/M phase arrest of HCCC⁃9810 cells,resulting in decreased proliferation and migration(P < 0.05). Further studies showed that CDKN3 silence down⁃regulated the activity of CDC25C/CDK1 axis,leading to increased phosphorylation level(P < 0.05). In addition,CDKN3 overexpression significantly reduced the sensitivity of HCCC⁃9810 cells to cisplatin(P < 0.05). Conclusion CDKN3 is significantly up⁃regulated in intrahepatic cholangiocarcinoma. CDKN3 may be involved in the development of intrahepatic cholangiocarcinoma by regulating the expression of proteins related to G2/M checkpoint.

Key words:

intrahepatic cholangiocarcinoma, CDKN3, cell cycle, chemoresistance