基础医学与临床 ›› 2012, Vol. 32 ›› Issue (1): 71-76.

• 技术与方法 • 上一篇    下一篇

采用组织贴壁法从整根脐带分离培养间充质干细胞及其生物学特性的研究

张颢1,张斌2,2,陈虎3   

  1. 1. 哈尔滨市第一医院
    2.
    3. 科学院附属医院造血干细胞移植
  • 收稿日期:2011-10-13 修回日期:2011-11-28 出版日期:2012-01-05 发布日期:2011-12-28
  • 通讯作者: 陈虎 E-mail:chenhu217@yahoo.com.cn
  • 基金资助:
    国家863重大专项课题; 黑龙江省卫生厅科研课题;首都临床特色应用研究;哈尔滨市科技创新人才研究专项基金项目

Isolation and charcaterization of mesenchymal stem cells derived from whole human umbilical cord applying a direct explant technique

  • Received:2011-10-13 Revised:2011-11-28 Online:2012-01-05 Published:2011-12-28

摘要: 为了建立从整根脐带中分离培养间充质干细胞(UC-MSCs)的技术,并对其生物学特性进行研究。采用组织贴壁法分离UC-MSCs, 并通过传代进行纯化和扩增培养, 绘制生长曲线:用流式细胞仪检测UC-MSCs表面抗原及细胞周期; 在特定诱导体系中,检测UC-MSCs向脂肪、成骨及软骨分化的能力;采用RT-PCR检测多能干细胞标志多能干细胞标志Oct4, Sox-2, Nanog mRNA水平。结果表明, 成功建立了UC-MSCs分离培养的方法;流式细胞仪检测结果显示, 贴壁细胞均表达CD73 、CD90 、CD105, 不表达造血细胞表型CD34、CD45 和HLA-DR ;细胞倍增时间为(24.04±0.49)h , 细胞周期分析表明,G0~G1 期和S+ G2 + M 期所占比例分别为81.56 %和18.44%;UC-MSCs能够向脂肪、成骨和软骨分化;表达Oct4, Sox-2, Nanog基因。结论:组织贴壁法是一种较好的分离培养UC-MSCs的方法,培养的细胞为具有增殖能力强和更原始间充质干细胞,为建立间充质干细胞库和临床应用提供了理论依据。

关键词: 脐带, 间充质干细胞, 分化, 成骨细胞, 脂肪细胞, 软骨细胞

Abstract: This study was purposed to investigate a techique to isolate mesenchymal stem cells from whole umbilical cord and their biological characteristics. Mesenchymal stem cells(MSCs) were isolated from umbilical cord(UC) by applying a explant technique and explanding cultured in vitro. Growth curves were drawn, and The phenotypes and cell cycle were evaluated by flow cytometry. UC-MSCs was induced to differentiate into adipocytes, osteocytes and chondrocytes in special differentiation condition. Mutidifferentiation related genes and stem cell-related transcription factors, Nanog, Oct-4, Sox-2 were detected by TR-PCR. The result indicated that UC-MSCs were easily isolated using a explant technique, and characteristic of plastic adherence and fibroblast-like morphology. the adherent cells displayed an abundant presence of CD73, CD90, CD105 and absence of CD34 , CD45 , HLA-DR. Cell cycle showed t hat there was percentage of stem cells as G0 / G81.56 % and S + G2 + M18.44% respectively. When cultured in differentiation media, they can be differentiated into adipocytes, osteocytes and chondrocytes. RT-PCR reactions confirmed that their mutidifferentiation related genes were positive.Moreover, stem cell-related transcription factors, Nanog, Oct-4, Sox-2 were positively expressed in UC-MSCs. Based on these findings, the explant technique method is a better method to obtain MSCs from whole human umbilical cord, and UC can be considered as a novel and convenient source of adult MSCs displaying high expansion potential and primitive pluripotent sten cells.

Key words: umbilical cord, mesenchymal stem cells, Differentiation, adipocytes , osteocytes, chondrocytes