遗传 ›› 2020, Vol. 42 ›› Issue (3): 287-295.doi: 10.16288/j.yczz.19-334

• 研究报告 • 上一篇    下一篇

PAI-1过表达促进食管鳞癌细胞的侵袭和迁移

王迪, 杨荔艳, 刘奏, 余竟, 张敏杰, 张钰, 蔡岩, 徐昕, 郝佳洁(), 王明荣()   

  1. 国家癌症中心/国家肿瘤临床医学研究中心, 中国医学科学院北京协和医学院肿瘤医院肿瘤精准医学研究中心, 分子肿瘤学国家重点实验室,北京 100021
  • 收稿日期:2019-12-31 修回日期:2020-02-12 出版日期:2020-03-20 发布日期:2020-02-27
  • 通讯作者: 郝佳洁,王明荣 E-mail:hjj8173@126.com;wangmr2015@126.com
  • 作者简介:王迪,硕士研究生,专业方向:肿瘤遗传学。E-mail: 15604011202@163.com
  • 基金资助:
    国家自然科学基金项目编号(81520108023);中国医学科学院医学与健康科技创新工程项目编号(2019-I2M-1-003);中国医学科学院医学与健康科技创新工程项目编号(2016-I2M-3-007);北京市科技新星项目资助编号(Z171100001117017)

PAI-1 overexpression promotes invasion and migration of esophageal squamous carcinoma cells

Wang Di, Yang Liyan, Liu Zou, Yu Jing, Zhang Minjie, Zhang Yu, Cai Yan, Xu Xin, Hao Jiajie(), Wang Mingrong()   

  1. State Key Laboratory of Molecular Oncology, Center for Cancer Precision Medicine, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
  • Received:2019-12-31 Revised:2020-02-12 Online:2020-03-20 Published:2020-02-27
  • Contact: Hao Jiajie,Wang Mingrong E-mail:hjj8173@126.com;wangmr2015@126.com
  • Supported by:
    Supported by the National Natural Science Foundation of China No(81520108023);CAMS Innovation Fund for Medical Sciences Nos(2019-I2M-1-003);CAMS Innovation Fund for Medical Sciences Nos(2016-I2M-3-007);Beijing Nova Program No(Z171100001117017)

摘要:

食管癌是常见的恶性肿瘤之一。由SERPINE1基因编码的纤溶酶原激活物抑制因子1 (plasminogen activator inhibitor-1, PAI-1)已被报道在多种类型癌症患者的肿瘤组织中存在高表达并参与癌症进展。为探讨PAI-1蛋白在食管鳞癌中的作用及其分子机制,本研究首先利用Western blot实验和酶联免疫吸附实验(enzyme linked immunosorbent assay, ELISA)检测各食管鳞癌细胞系中PAI-1的表达和分泌水平,结果显示,PAI-1高表达的食管鳞癌细胞系分泌至细胞外的PAI-1水平相对较高。进一步选取PAI-1表达及分泌水平均较高的KYSE150和KYSE450细胞系作为研究模型,通过siRNA(小干扰RNA)瞬时转染和Transwell实验证实敲降SERPINE1可显著抑制食管鳞癌KYSE150和KYSE450细胞的侵袭和迁移。同时,构建了慢病毒介导的SERPINE1稳定敲降细胞株KYSE150和KYSE450,将SERPINE1稳定敲降的细胞培养基中外源加入PAI-1蛋白进行 Transwell回复实验,结果表明PAI-1过表达可增强食管鳞癌细胞的侵袭和迁移能力。体内实验结果显示,降低PAI-1表达可显著抑制食管鳞癌细胞的成瘤和肺转移能力。分子水平检测表明PAI-1过表达可激活AKT和ERK信号通路,免疫共沉淀(co-immunoprecipitation, Co-IP)实验结果进一步显示PAI-1可能与膜受体LRP1 (LDL receptor related protein 1)存在相互作用。上述研究结果表明,PAI-1可能通过与LRP1相互作用进而促进食管鳞癌细胞的侵袭和迁移。

关键词: PAI-1, 食管鳞癌, 侵袭, 迁移

Abstract:

Esophageal squamous cell carcinoma (ESCC) is one of the most common cancers worldwide. Plasminogen activator inhibitor-1 (PAI-1), encoded by SERPINE1, is highly expressed in various types of tumor tissues, which contributes to cancer progression. The present study explored the role and underlying mechanisms of PAI-1 in ESCC. We found that the PAI-1 protein was extracellularly secreted more from ESCC cells with high PAI-1 expression using Western blotting and enzyme linked immunosorbent assay (ELISA). Knockdown of SERPINE1 expression significantly inhibited the invasion and migration of ESCC KYSE150 and KYSE450 cell lines, which could be restored when adding exogenous human recombinant PAI-1 into the culture medium of the cells stably expressing SERPINE1 shRNA. In vivo experiments showed that SERPINE1 knockdown significantly inhibited xenograft growth and lung metastasis of ESCC cells. Molecular analysis demonstrated that PAI-1 activated AKT and ERK signaling pathways. Co-immunoprecipitation (Co-IP) assays identified that PAI-1 may interact with the membrane receptor LDL receptor related protein 1 (LRP1). These results indicated that overexpression of PAI-1, through interacting with LRP1, might enhance invasion and migration of ESCC cells as well as promote ESCC progression.

Key words: PAI-1, ESCC, invasion, migration