中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (11): 1597-1602.doi: 10.3969/j.issn.2095-4344.2016.11.012

• 组织构建细胞学实验 cytology experiments in tissue construction • 上一篇    下一篇

胃癌干细胞CSC-G在胃癌侵袭和转移中的作用

李向辉,王贵吉   

  1. 郑州大学第一附属医院肿瘤科三病区,河南省郑州市 450052
  • 收稿日期:2016-02-07 出版日期:2016-03-11 发布日期:2016-03-11
  • 通讯作者: 王贵吉,教授,郑州大学第一附属医院肿瘤科三病区,河南省郑州市 450052
  • 作者简介:李向辉,男, 1986年生,汉族,河南省周口市人,郑州大学在读硕士,医师。
  • 基金资助:
    国家自然科学基金(81170520)

Effect of gastric cancer stem cells CSC-G on invasion and metastasis of gastric cancer cells

Li Xiang-hui, Wang Gui-ji   

  1. Third Ward, Department of Oncology, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
  • Received:2016-02-07 Online:2016-03-11 Published:2016-03-11
  • Contact: Wang Gui-ji, Professor, Third Ward, Department of Oncology, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
  • About author:Li Xiang-hui, Studying for master’s degree, Physician, Third Ward, Department of Oncology, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
  • Supported by:

     the National Natural Science Foundation of China, No. 81170520

摘要:

文章快速阅读:

文题释义:

胃癌干细胞:被认为是引起胃癌耐药、转移以及复发的根本原因,胃癌在经过常规手术治疗或者辅助化疗治疗后,胃癌干细胞的数量并没有减少,并出现富集的现象,从而导致胃癌的转移和复发。

胃癌干细胞的分离和鉴定:①分子标记物分选法:用于胃癌干细胞分选的分子标志物主要有CD44+,CD90+,CD44+CD24+,CD44+CD54+等多种分子标志物。②侧群细胞法:根据肿瘤干细胞具有外排荧光染料能力的特性进行分选肿瘤干细胞。③成球培养法:胃癌细胞可以在无血清的培养基中成球生长,成球培养法可以用于胃癌干细胞的分离培养。④化疗药物富集法:采用化疗药物长春新碱诱导的胃癌细胞具有干细胞的特性,也可以用于胃癌干细胞的分离和培养。

 

背景:研究表明肿瘤干细胞在肿瘤的侵袭和转移中发挥重要作用,关于胃癌干细胞在胃癌的侵袭和转移中的作用的研究不多。
目的:观察胃癌干细胞CSC-G在胃癌侵袭和转移中的作用。
方法:对胃癌干细胞和SGC7901胃癌细胞进行为期10 d的体外培养。进行球形克隆形成实验,Western blot法检测胃癌干细胞和SGC7901胃癌细胞的OCT4,SOX2,E-cadherin和CD44蛋白表达,Transwell法检测胃癌干细胞和SGC7901胃癌细胞的侵袭性和迁移能力。

结果与结论:①细胞形态:胃癌细胞SGC7901在RPMI1640培养基中呈现贴壁生长,传代后细胞为四边形或者多角形;胃癌干细胞CSC-G在无血清培养基中呈悬浮生长,贴壁生长的胃癌干细胞呈梭形或圆形;②细胞侵袭性和迁移性:与胃癌细胞SGC7901相比,胃癌干细胞CSC-G的OCT4,SOX2,CD44蛋白表达:瘤球数量,穿过基底膜的细胞数明显升高(P < 0.05),E-cadherin蛋白表达降低(P < 0.05);③结果表明,实验成功体外培养了胃癌干细胞CSC-G,其侵袭性和迁移能力与胃癌细胞相比明显增强,说明胃癌干细胞CSC-G在胃癌侵袭和转移中发挥重要作用。 

ORCID: 0000-0001-7851-419X(王贵吉)

关键词: 组织构建, 组织工程, 胃癌, 干细胞, 胃癌干细胞, 更新, 分化, 侵袭, 转移, 复发, 球形克隆无血清培养, 国家自然科学基金

Abstract:

BACKGROUND: Studies have shown that cancer stem cells play an important role in tumor invasion and metastasis, but studies on the role of gastric cancer stem cells in invasion and metastasis of gastric cancer cells were rarely reported.
OBJECTIVE: To study the effect of gastric cancer stem cells CSC-G on invasion and metastasis of gastric cancer cells.
METHODS: Gastric cancer stem cells CSC-G and gastric cancer cells SGC7901 were cultured in vitro for 10 days followed by spherical colony formation assay, western blot assay for detecting OCT4, SOX2, E-cadherin and CD44 protein expression levels in gastric cancer stem cells CSC-G and gastric cancer cells SGC7901, and Transwell assay for detecting the invasion and migration of gastric cancer stem cells and gastric cancer cells SGC7901.
RESULTS AND CONCLUSION: Gastric cancer cells SGC7901 in RPMI1640 medium presented with adherent growth and were quadrilateral or polygonal after passage; gastric cancer stem cells CSC-G in serum-free medium presented with suspension growth, and adherent gastric cancer stem cells were spindle-shaped or round. Compared with gastric cancer cells SGC7901, the protein expressions of OCT4, SOX2 and CD44, the number of cancer cell spheres and the number of trans-membrane cells were significantly increased in the gastric cancer stem cells CSC-G (P < 0.05), and the expression of E-cadherin protein was significantly decreased (P < 0.05). These findings indicate that the gastric cancer stem cells CSC-G can be successfully cultured in vitro, and have enhanced invasion and migration compared with the gastric cancer cells SGC7901, which play an important role in gastric cancer invasion and metastasis.