中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (1): 32-37.doi: 10.3969/j.issn.2095-4344.2017.01.006

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

胃癌微环境转化后骨髓间充质干细胞的体内致瘤性

汪永锋1,刘喜平1,崔国宁1,董俊刚1,李沛清1,明海霞1,张  炜2   

  1. 1甘肃中医药大学基础医学院,甘肃省兰州市  730000
    2兰州大学第一附属医院,甘肃省兰州市  730000
  • 修回日期:2016-11-10 出版日期:2017-01-08 发布日期:2017-03-15
  • 通讯作者: 刘喜平,博士,教授,甘肃中医药大学基础医学院,甘肃省兰州市 730000
  • 作者简介:汪永锋,男,1967年生,甘肃省人,汉族,1990年兰州医学院毕业,副教授,主要从事解剖与组织胚胎学研究。
  • 基金资助:

    国家自然科学基金项目(81260525)

In vivo tumorigenicity of bone marrow mesenchymal stem cells in the body after the conversion of gastric cancer microenvironment

Wang Yong-feng1, Liu Xi-ping1, Cui Guo-ning1, Dong Jun-gang1, Li Pei-qing1, Ming Hai-xia1, Zhang Wei2   

  1. 1School of Basic Medicine, Gansu University of Chinese Medicine, Lanzhou 730000, Gansu Province, China
    2First Affiliated Hospital of Lanzhou University, Lanzhou 730000, Gansu Province, China
  • Revised:2016-11-10 Online:2017-01-08 Published:2017-03-15
  • Contact: Liu Xi-ping, M.D., Professor, School of Basic Medicine, Gansu University of Chinese Medicine, Lanzhou 730000, Gansu Province, China
  • About author:Wang Yong-feng, Associate professor, School of Basic Medicine, Gansu University of Chinese Medicine, Lanzhou 730000, Gansu Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81260525

摘要:

文章快速阅读:

文题释义:
干细胞巢:
各种干细胞生存在特定的细胞和非细胞成分的环境中,称之为微环境,亦称干细胞巢,它是干细胞维持稳态,即保持细胞正常增殖、分化、代谢和功能活动的关键。
处于胃癌微环境中的骨髓间充质干细胞:其形态和表明标志物CD34,CD44会发生一定改变,有向胃癌干细胞转化的趋势。将胃癌微环境与骨髓间充质干细胞共培养转化后的骨髓间充质干细胞裸鼠皮下接种后,结果发现其在体内有明显的致瘤能力,表明经胃癌微环境转化的骨髓间充质干细胞已发生了恶性转化,可能已转化为胃癌干细胞。

 

摘要
背景:
临床胃癌组织及裸鼠体内致瘤组织分离得到的胃癌间质干细胞,其生物学特性与骨髓间充质干细胞相似,并证明是肿瘤微环境的重要组成部分,可促进肿瘤的生长。
目的:观察经胃癌微环境转化后的骨髓间充质干细胞在体内是否具有致瘤能力。
方法:设立骨髓间充质干细胞单独常规培养为对照组,实验组采用Transwell 小室将人胃癌BCG-823细胞与大鼠骨髓间充质干细胞非接触共培养建立胃癌微环境。收集骨髓间充质干细胞,分别在裸鼠腋下部位行皮下接种对照组细胞或实验组共培养转化后的骨髓间充质干细胞,观察裸鼠皮下有无结节形成;免疫组织化学法检测肿瘤组织潜伏膜蛋白LMP1及抑癌基因TCF21的表达;透射电镜观察肿瘤组织的超微结构。
结果与结论:①肿瘤结节:对照组裸鼠接种单独培养的骨髓间充质干细胞7-14 d后,始终未形成肿瘤结节。实验组在第7天皮下开始出现肿瘤结节,至14 d肿瘤结节显著增大并稳定;②免疫组织化学显示,实验组潜伏膜蛋白LMP1呈显著现高表达状态,抑癌基因TCF21呈低表达状态;③透射电镜结果显示肿瘤体组织体积较大,形态不规则,细胞微绒毛异常增多,表面有许多树枝状突起,细胞内成分发生明显改变;④结果表明,经胃癌微环境转化的骨髓间充质干细胞具有体内致瘤能力。

 

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程
ORCID:
0000-0001-8575-401X(汪永锋)

关键词: 干细胞, 肿瘤干细胞, 胃癌BCG-823细胞, 骨髓间充质干细胞, 共培养, 胃癌微环境, 胃癌干细胞, 体内实验, 致瘤性, 抑癌基因TCF21, 潜伏膜蛋白LMP1, 超微结构, 国家自然科学基金

Abstract:

BACKGROUND: The clinical gastric cancer tissues and the mesenchymal stem cells isolated from tumor 
tissues in the body of nude mice have similar characteristics with bone marrow mesenchymal stem cells, which are certificated to be an important part of the tumor microenvironment that can promote the growth of tumor.
OBJECTIVE: To observe that whether bone marrow mesenchymal stem cells have the tumorigenic ability after the conversion of gastric microenvironment.
METHODS: Bone marrow mesenchymal stem cells cultured singly and routinely were used as controls. Rat bone marrow mesenchymal stem cells were indirectly co-cultured with gastric cancer BCG-823 cells in a Transwell chamber to construct the gastric microenvironment (experimental group). Bone marrow mesenchymal stem cells from each group were subcutaneously seeded into the forelimb armpit of nude mice, and then, the formation of subcutaneous nodules was observed. Immunohistochemical method was used to detect the expression of tumor tissue latent membrane protein 1 (LMP1) and tumor suppressor gene TCF21. Transmission electron microscope was used to observe the ultrastructure of tumor tissues.
RESULTS AND CONCLUSION: After 7-14 days, there were no tumor nodules in the nude mouse armpit in the control group. On the contrary, in the experimental group, tumor nodules formed in the nude mouse armpit after 7 days, and these nodules were enlarged and kept stable until the 14th day. The immunohistochemical results showed high level of LMP1, but low level of TCF21. Under the transmission electron microscope, the tumor tissues had a large volume and an irregular shape, the cell mricovilli were increased abnormally, and there were many fendritic protrusions on the surface, indicating the presence of obvious intracellular changes. In conclusion, bone marrow mesenchymal stem cells after the conversion in the gastric microenvironment have the ability of tumorigenicity in vivo.

 

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

Key words: Bone Marrow, Mesenchymal Stem Cells, Stomach Neoplasms, Tissue Engineering

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