中国组织工程研究 ›› 2013, Vol. 17 ›› Issue (14): 2570-2577.doi: 10.3969/j.issn.2095-4344.2013.14.015

• 干细胞培养与分化 stem cell culture and differentiation • 上一篇    下一篇

大鼠骨髓源性内皮祖细胞的分离培养与鉴定

卫肖艳1,张  莉1,林  明2,陈  欢1,彭  博1,彭园园1,李富运1,洪培馨1,范伊凡1   

  1. 1 北京中医药大学针灸推拿学院,北京市  100029
    2 北京大学医学部基础医学院细胞生物学与遗传学系,北京市  100083
  • 收稿日期:2012-10-26 修回日期:2013-01-31 出版日期:2013-04-02 发布日期:2013-04-02
  • 通讯作者: 张莉,教授,北京中医药大学针灸推拿学院针灸临床系,北京市 100029 zhangli1572@sina.com
  • 作者简介:卫肖艳☆,女,1982年生,山西省运城市人,汉族,北京中医药大学在读博士,主要从事针灸与血管再生的研究。 wxy66603704@163.com
  • 基金资助:

    国家自然科学基金专项基金项目(81141120)。

Isolation, culture and identification of rat bone marrow-derived endothelial progenitor cells

Wei Xiao-yan1, Zhang Li1, Lin Ming2, Chen Huan1, Peng Bo1, Peng Yuan-yuan1, Li Fu-yun1, Hong Pei-xin1, Fan Yi-fan1   

  1. 1 College of Acupuncture-Moxibustion and Tuina, Beijing University of Traditional Chinese Medicine, Beijing  100029, China
    2 Department of Cell Biology and Genetics, College of Basic Medical Sciences, Health Science Center, Peking University, Beijing  100083, China
  • Received:2012-10-26 Revised:2013-01-31 Online:2013-04-02 Published:2013-04-02
  • Contact: Zhang Li, Professor, College of Acupuncture-Moxibustion and Tuina, Beijing University of Traditional Chinese Medicine, Beijing 100029, China zhangli1572@sina.com
  • About author:Wei Xiao-yan☆, Studying for doctorate, College of Acupuncture-Moxibustion and Tuina, Beijing University of Traditional Chinese Medicine, Beijing 100029, China wxy66603704@163.com
  • Supported by:

    the National Natural Science Foundation of Vhina (Special Program), No. 81141120

摘要:

背景:内皮祖细胞因其分离与培养的方法各不相同,在实验中难以重复。
目的:探讨大量获取骨髓源性内皮祖细胞分离与培养的方法。
方法:通过密度梯度离心法从4周龄SD大鼠骨髓中分离单个核细胞,使用EGM-2 MV培养基进行诱导培养,采用形态学特征观察、摄取Dil-Ac-LDL与结合FITC-UEA-1实验、免疫荧光化学鉴定其表面抗原CD133与VEGFR2等方法对其进行鉴定,并通过管腔形成实验观察形成管腔的能力。
结果与结论:①形态学观察:分离的骨髓单个核细胞经诱导培养后,在生长的早期(8 d左右)、晚期(15 d左右)其细胞形态有一定差异,早期以纺锤形、三角形、圆形细胞多见,晚期以圆形、短梭形细胞多见。②摄取Dil-Ac-LDL与结合FITC-UEA-1实验:显示8,21 d的细胞均为阳性。③免疫荧光化学染色:8 d的细胞表达CD133、VEGFR2。④管腔形成实验:在Matrigel基质上15 h左右能够生成血管样结构。结果表明:利用密度梯度离心法分离大鼠骨髓单个核细胞后以EGM-2 MV进行诱导培养,经过鉴定证明获得的细胞符合内皮祖细胞的特征。这种方法能够简单、快速、可靠、大量地获取内皮祖细胞。

关键词: 干细胞, 干细胞培养与分化, 内皮祖细胞, 单个核细胞, 密度梯度离心法, 细胞培养, 细胞鉴定, 管腔形成, 国家自然科学基金, 干细胞图片文章

Abstract:

BACKGROUND: Endothelial progenitor cells have a very broad application prospect, but the isolation and culture methods differ greatly and therefore are hard to repeat.
OBJECTIVE: To investigate the isolation and culture methods of bone marrow-derived endothelial progenitor cells.
METHODS: Bone marrow mononuclear cells were isolated from 4-week-old Sprague-Dawley rats by density gradient centrifugation methods and cultured by EGM-2 MV medium. Then the cells were identified by morphological observation, FITC-UEA-1 binding and Dil-Ac-LDL uptake assay, and fluorescent immunocytochemistry for detection CD133 and VEGFR2 expression. In addition, angiogenic tube formation was determined by Matrigel tube formation assays.
RESULTS AND CONCLUSION: (1) Morphology: After induced culture, the isolated bone marrow mononuclear cells exhibited a spindle-shaped, triangular, and round appearance in the early stage (about the 8th day) and round and short spindle-shaped appearance in the late stage (about the 15th day). (2) FITC-UEA-1 binding and Dil-Ac-LDL uptake assay: Cells were positive on days 8 and 21. (3) Fluorescent immunocytochemistry: on day 8, cells expressed CD133 and VEGFR2. (4) Matrigel tube formation assays: Capillary-like structures formed at 15 hours on Matrigel. These findings suggest that rat bone marrow mononuclear cells isolated by density gradient centrifugation method and cultured by EGM-2MV medium correspond to the characteristics of endothelial progenitor cells. This method is simple, quick, and reliable to harvest enough endothelial progenitor cells.

Key words: stem cells, stem cell culture and differentiation, endothelial progenitor cells, mononuclear cells, density gradient centrifugation, cell culture, cell identification, tube formation, National Natural Science Foundation of China, stem cell photographs-containing paper

中图分类号: