中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (10): 1426-1432.doi: 10.3969/j.issn.2095-4344.2016.10.008

• 肿瘤干细胞 cancer stem cells • 上一篇    下一篇

上皮间质转化在胃癌SGC7901细胞向胃癌干细胞转化过程中的作用

邢会军1,赵艳军2,侯 雷1,孙 勇1,刘 朋1,李春辉3   

  1. 承德医学院附属医院,1胃肠外科,2急诊科,3病理科,河北省承德市 067000
  • 收稿日期:2016-01-12 出版日期:2016-03-04 发布日期:2016-03-04
  • 通讯作者: 赵艳军,硕士,副主任医师,承德医学院附属医院急诊科,河北省承德市 067000
  • 作者简介:邢会军,男,1966年生,河北省承德市人,汉族,硕士,副主任医师。主要从事胃肠肿瘤的研究。
  • 基金资助:
    河北省医学科学研究重点课题计划(ZL20140103)

     

Role of epithelial-mesenchymal transition in transformation of gastric cancer cells SGC7901 to gastric cancer stem cells

Xing Hui-jun1, Zhao Yan-jun2, Hou Lei1, Sun Yong1, Liu Peng1, Li Chun-hui3   

  1. 1Department of Gastrointestinal Surgery, 2Department of Emergency, 3Department of Pathology, Affiliated Hospital of Chengde Medical University, Chengde 067000, Hebei Province, China
  • Received:2016-01-12 Online:2016-03-04 Published:2016-03-04
  • Contact: Zhao Yan-jun, Master, Associate chief physician, Department of Emergency, Affiliated Hospital of Chengde Medical University, Chengde 067000, Hebei Province, China
  • About author:Xing Hui-jun, Master, Associate chief physician, Department of Gastrointestinal Surgery, Affiliated Hospital of Chengde Medical University, Chengde 067000, Hebei Province, China
  • Supported by:

    the Medical Science Research Project of Hebei Province, No. ZL20140103

摘要:

文章快速阅读:

文题释义:

上皮间质转化:是指上皮细胞失去其形态和功能后,逐渐转化为间质样细胞的过程,与肿瘤的侵袭、转移、复发以及耐药性密切相关。上皮间质转化的调控因素有很多,如E-钙黏蛋白、转化生长因子β、Wnt信号通路、微RNA及转录因子等。
上皮间质转化与肿瘤的关系:上皮间质转化过程抑制致癌基因引起的提前衰老。在上皮间质转化过程中的肿瘤可以拮抗化疗和免疫疗法,并且逃脱免疫系统的监视。最近的研究中发现上皮间质转化中的细胞可以获得类似于干细胞的特性,这些尚未分化的间质细胞从表达E-钙黏蛋白变为表达N-钙黏蛋白,并且表达Snail,蛋白酶,以及一些细胞全能性转录因子如Oct-4和Nanog。

 

背景:有研究发现上皮间质转化和肿瘤的侵袭、转移以及耐药性密切相关,但关于上皮间质转化在胃癌SGC7901细胞向胃癌干样细胞转化过程中的作用的研究较为少见。
目的:探讨上皮间质转化在胃癌SGC7901细胞向胃癌干样细胞转化过程中的作用。
方法:长春新碱诱导胃癌 SGC7901 细胞,并对长春新碱诱导的胃癌SGC7901细胞进行培养筛选制备胃癌干样细胞,鉴定细胞CD44表型、观察细胞形态变化、检测干细胞相关标志物、检测上皮间质转化相关分子。

结果与结论:①胃癌SGC7901 细胞传代后经过长春新碱诱导后细胞形态发生了改变,无血清悬浮培养后,见克隆样细胞球生成,同时CD44表型的细胞比例下降;②胃癌干样细胞中的SOX2和OCT4的表达水平以及间质标志物Snail1 mRNA、Twist mRNA和Vimentin mRNA表达水平均明显高于胃癌SGC7901细胞,但上皮细胞标志物E-钙黏蛋白mRNA表达水平明显低于胃癌SGC7901细胞;③结果表明胃癌SGC7901细胞能够成功转化为胃癌干样细胞,上皮间质转化参与了胃癌SGC7901细胞向胃癌干样细胞的转化。 

ORCID: 0000-0001-5257-766X(邢会军)

关键词: 干细胞, 肿瘤干细胞, 上皮间质转化, 胃癌, 胃癌干样细胞, 耐药, 复发, 转移, 长春新碱, 诱导

Abstract:

BACKGROUND: Studies have found that epithelial-mesenchymal transition is closely related with tumor invasion, metastasis, and drug resistance, but studies on the role of epithelial-mesenchymal transition in the transformation process of gastric cancer cells SGC7901 to gastric cancer stem-like cells are rarely reported.
OBJECTIVE: To explore the effect of epithelial-mesenchymal transition in the transformation process of gastric cancer cells SGC7901 to gastric cancer stem-like cells.
METHODS: Vincristine-induced SGC7901 cells were cultured and screened to prepare gastric cancer stem-like cells. CD44 phenotype, morphological changes, stem cell-related markers, and epithelial-mesenchymal transition related molecules were detected.
RESULTS AND CONCLUSION: After passage, vincristine-induced SGC7901 cells presented with morphological changes, and clonal cell spheres generated after serum-free suspension culture. Meanwhile, the proportion of SGC7901 cells positive for CD44 was decreased. Expression levels of SOX2, OCT4, Snail1 mRNA, Twist mRNA and Vimentin mRNA were significantly higher in the gastric cancer stem-like cells than SGC7901 cells, but the expression level of E-caderin was lower in the gastric cancer stem-like cells than SGC7901 cells. These findings indicate that gastric cancer cells SGC7901 can be successfully transformed into gastric cancer stem-like cells, and the epithelial-mesenchymal transition is involved in this transforming progress.