中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (14): 2040-2045.doi: 10.3969/j.issn.2095-4344.2016.14.009

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

胃癌微环境对大鼠骨髓间充质干细胞形态、生长及CD34、CD44表达的影响

吴高峰1,刘喜平1,杨柏林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
  • 收稿日期:2016-02-21 出版日期:2016-04-01 发布日期:2016-04-01
  • 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:吴高峰,男,1988年生,湖北省武汉市人,汉族,甘肃中医药大学在读硕士,主要从事消化系统疾病的基础与临床研究。
  • 基金资助:

    国家自然科学基金项目(81260525)

Morphology and proliferation of bone marrow mesenchymal stem cells and expressions of CD34 and CD44 under stomach cancer microenvironment

Wu Gao-feng1, Liu Xi-ping1, Yang Bai-lin1, Li Pei-qing1, Ming Hai-xia1, Zhang Wei2   

  1. 1Basic Medicine School of Gansu University of Chinese Medicine, Lanzhou 73000, Gansu Province, China; 2the First Affiliated Hospital of Lanzhou University, Lanzhou 73000, Gansu Province, China
     
  • Received:2016-02-21 Online:2016-04-01 Published:2016-04-01
  • Contact: Liu Xi-ping, M.D., Professor, Basic Medicine School of Gansu University of Chinese Medicine, Lanzhou 730000, Gansu Province, China
  • About author:Wu Gao-feng, Studying for master’s degree, Basic Medicine School of 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:
肿瘤微环境:是一个复杂的综合系统,是肿瘤在其发生发展过程中所处的内环境 ,主要由肿瘤细胞本身、众多基质细胞及肿瘤细胞产生的细胞因子、蛋白水解酶、微血管、 微淋巴管、组织液等共同构成。
CD34分子:是高度糖基化的i型跨膜糖蛋白,选择性地表达于人类及其他哺乳动物造血干/祖细胞表面,并随细胞的成熟逐渐减弱至消失。目前已有愈来愈多的研究结果表明CD34分子在介导细胞间黏附作用中发挥着重要作用,可以参与造血干细胞的运输、定植,参与炎症反应以及淋巴细胞的归巢。

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(GC-MSCs),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,作者推测骨髓间充质干细胞在胃癌微环境中生物学特性可能发生变化。
目的:观察胃癌微环境对骨髓间充质干细胞形态、生长及CD34、CD44表达的影响。
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,倒置相差显微镜观察骨髓间充质干细胞形态的变化、四甲基偶氮唑盐比色法(MTT法)观察骨髓间充质干细胞的增殖率、流式细胞术(FCM)检测骨髓间充质干细胞周期及表面抗原CD34、CD44的表达。
结果与结论:①实验组骨髓间充质干细胞排列紊乱,不规则,细胞间连接疏松,细胞变细、变长,胞核变小,呈团生长,与人胃BGC-823癌细胞形态有相似之处;②G1期细胞比例明显降低,S期细胞比例明显增加(P < 0.01)、G2/M期细胞比率显著增加(P < 0.05);③实验组骨髓间充质干细胞的CD44阳性表达率显著降低,CD34阳性表达率显著降升高(P < 0.01);④结果表明,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模拟胃癌微环境对骨髓间充质干细胞形态、生长增殖及CD34、CD44表达有显著影响,有向胃癌细胞恶性转化的趋势。
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: 0000-0002-7681-0363(刘喜平)

关键词: 干细胞, 骨髓干细胞, 胃癌微环境, 骨髓间充质干细胞, 细胞增殖, CD34、CD44, 国家自然科学基金

Abstract:

BACKGROUND: Gastric cancer mesenchyal stem cells from clinical stomach cancer specimens and tumorigenic tissues in nude mice are similar to the bone marrow mesenchymal stem cells in biological characteristics, which have been proved to be an important component of tumor microenvironment to promote tumor growth. It is speculated that biological characteristic of bone marrow mesenchymal stem cells may change in stomach cancer microenvironment.

OBJECTIVE: To observe the effect of stomach cancer microenvironment on morphology and proliferation of bone marrow mesenchymal stem cells and expressions of CD34 and CD44.
METHODS: Rat bone marrow mesenchymal stem cells were cultured alone as control group. In the test group, rat bone marrow mesenchymal stem cells were co-cultured with human stomach cancer BGC-823 cells using Transwell chamber assay to establish the stomach cancer microenvironment. Then, cell morphology, proliferation, cell cycle and CD34, CD44 expressions were observed and detected using inverted phase contrast microscope, MTT assay, and flow cytometry, respectively.
RESULTS AND CONCLUSION: In the test group, bone marrow mesenchymal stem cells were similar to human stomach cancer cells BGC-823 that arranged disorderly and irregularly, were interconnected loosely, became thinner and longer, and grew in clusters with smaller nuclei. The cell proportion in G1 phase significantly decreased, but that in S and G2/M phases significantly increased (P < 0.01, P < 0.05). The positive rate of CD44 significantly declined, and the CD34 expression significantly raised (P < 0.01). In conclusion, stomach cancer microenvironment by non-contact co-culture with BCG-823 cells has an obvious effect on the morphology, proliferation and surface antigens expressions of bone marrow mesenchymal stem cells that will tend to be malignant gastric cancer cells.
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: Mesenchymal Stem Cells, Cell Proliferation, CD34, CD44, Tissue Engineering