遗传 ›› 2022, Vol. 44 ›› Issue (3): 230-244.doi: 10.16288/j.yczz.21-426

• 研究报告 • 上一篇    下一篇

MCM2通过抑制p53信号通路促进胆管癌细胞的增殖、迁移和侵袭

王翠玲1(), 刘信燚1, 王亚会2, 张争1, 王治东3, 周钢桥1,3()   

  1. 1. 军事科学院军事医学研究院辐射医学研究所,蛋白质组学国家重点实验室,国家蛋白质科学中心,北京 102206
    2. 军事科学院军事医学研究院生命组学研究所,蛋白质组学国家重点实验室,国家蛋白质科学中心,北京 102206
    3. 军事科学院军事医学研究院辐射医学研究所,北京 100850
  • 收稿日期:2021-12-20 修回日期:2022-01-18 出版日期:2022-03-20 发布日期:2022-01-29
  • 通讯作者: 周钢桥 E-mail:1376544094@qq.com;zhougq114@126.com
  • 作者简介:王翠玲,在读硕士研究生,专业方向:放射医学。E-mail: 1376544094@qq.com
  • 基金资助:
    国家自然科学基金项目资助(31771397)

MCM2 promotes the proliferation, migration and invasion of cholangiocarcinoma cells by reducing the p53 signaling pathway

Cuiling Wang1(), Xinyi Liu1, Yahui Wang2, Zheng Zhang1, Zhidong Wang3, Gangqiao Zhou1,3()   

  1. 1. National Center for Protein Sciences, the State Key Lab of Proteomics, Beijing Institute of Radiation Medicine, Academy of Military Medical Sciences, Academy of Military Sciences, Beijing 102206, China
    2. National Center for Protein Sciences, the State Key Lab of Proteomics, Beijing Institute of Life Omics, Academy of Military Medical Sciences, Academy of Military Sciences, Beijing 102206, China
    3. Beijing Institute of Radiation Medicine, Academy of Military Medical Sciences, Academy of Military Sciences, Beijing 100850, China
  • Received:2021-12-20 Revised:2022-01-18 Online:2022-03-20 Published:2022-01-29
  • Contact: Zhou Gangqiao E-mail:1376544094@qq.com;zhougq114@126.com
  • Supported by:
    Supported by the National Natural Science Foundation of China(31771397)

摘要:

微小染色体维持蛋白2 (minichromosome maintenance protein 2, MCM2)的异常表达与多种恶性肿瘤的发生发展密切相关。为探索MCM2基因对胆管癌细胞肿瘤生物学行为的影响及其潜在的作用机制,本研究首先采用cell counting kit-8 (CCK-8)、平板细胞克隆形成、Transwell和Invasion实验证实,MCM2可促进胆管癌细胞的增殖、迁移和侵袭能力;流式细胞术检测结果显示,MCM2可加快细胞周期进程,抑制细胞凋亡。进一步通过对胆管癌组织RNA测序数据集的分析发现,MCM2基因与p53信号通路的激活显著负相关。采用实时定量PCR (quantitative real time polymerase chain reaction, qRT-PCR)和蛋白质免疫印迹(Western blotting, WB)实验发现,在胆管癌细胞中MCM2可显著下调p53BAX的mRNA和蛋白表达水平,显著上调BCL2CCND1的mRNA和蛋白表达水平。采用流式细胞术、qRT-PCR和WB实验进一步证实MCM2基因依赖于p53通路发挥影响胆管癌细胞周期和凋亡的功能。最后,通过分析MCM2的表达水平与胆管癌患者临床预后的相关性发现,MCM2在胆管癌组织中的表达显著高于癌旁组织,且其高表达与患者的不良预后显著相关。综上所述,本研究初步揭示MCM2可能通过抑制p53信号通路促进胆管癌的发生发展,并提示MCM2的高表达与胆管癌的不良预后显著相关,为未来胆管癌新的临床诊治措施的研发提供了理论依据。

关键词: 胆管癌, MCM2, 细胞增殖, 细胞迁移, 细胞侵袭, 细胞周期, 细胞凋亡, p53

Abstract:

The abnormal expressions of minichromosome maintenance protein 2 (MCM2) are closely related to the development of various kinds of cancers. We aimed to explore the functions and potential molecular mechanisms of MCM2 gene in cholangiocarcinoma (CCA) cell lines (Huh28 and RBE). First, the cell counting kit-8 (CCK-8), plate clone formation, transwell and invasion assays showed that MCM2 promotes the proliferation, migration and invasion of CCA cells. Flow cytometry assays showed that MCM2 significantly promotes the cell cycle, and inhibits the apoptosis of CCA cells. Further, by analyzing the RNA sequencing data of cholangiocarcinoma, we found that MCM2 gene is significantly negatively correlated with p53 signaling pathway. Quantitative real time polymerase chain reaction (qRT-PCR) and Western blotting (WB) assays confirmed that MCM2 in CCA cells significantly down-regulated the mRNA and protein expression levels of p53 and BAX, and up-regulated the mRNA and protein expression levels of BCL2 and CCND1. Flow cytometry, qRT-PCR and WB assays confirmed that MCM2 promotes CCA through p53 pathway. Finally, we found that MCM2 is up-regulated in CCA tissues compared to the matched non-tumor cholangiocarcinoma tissues, and the high expressions of MCM2 are significantly associated with the poor clinical outcomes of CCA patients. In conclusion, this study revealed that MCM2 promotes the development of CCA by reducing the p53 pathway, and its high expression levels predict poor prognosis in CCA patients. These results provide a theoretical basis for the development of new clinical diagnosis and treatment of cholangiocarcinoma in the future.

Key words: cholangiocarcinoma, MCM2, proliferation, migration, invasion, cell cycle, apoptosis, p53