中国组织工程研究 ›› 2012, Vol. 16 ›› Issue (49): 9162-9167.doi: 10.3969/j.issn.2095-4344.2012.49.008

• 脂肪干细胞 adipose-derived stem cells • 上一篇    下一篇

兔脂肪干细胞的多向诱导分化

王清富,陈庄洪,蔡贤华,谢永辉,刁  波,刘  琴   

  1. 解放军广州军区武汉总医院骨科,湖北省武汉市   430070
  • 收稿日期:2012-06-01 修回日期:2012-10-25 出版日期:2012-12-02 发布日期:2012-10-25
  • 通讯作者: 陈庄洪,教授,主任医师,博士生导师,解放军广州军区武汉总医院骨科,湖北省武汉市 430070
  • 作者简介:王清富☆,男,1977年生,广东省化州市人,汉族,在读博士,主要从事脊柱外科、骨组织工程研究。 frandis@126.com
  • 基金资助:

    全军“十一五攻关”项目助资(06G047)。

Multi-directional induced differentiation of rabbit adipose-derived stem cells

Wang Qing-fu , Chen Zhuang-hong, Cai Xian-hua, Xie Yong-hui, Diao Bo, Liu Qin   

  1. Department of Orthopedics, Wuhan General Hospital of Guangzhou Military Command, Wuhan 430070, Hubei Province, China
  • Received:2012-06-01 Revised:2012-10-25 Online:2012-12-02 Published:2012-10-25
  • Contact: Chen Zhuang-hong, Professor, Chief physician, Doctoral supervisor Department of Orthopedics, Wuhan General Hospital of Guangzhou Military Command, Wuhan 430070, Hubei Province, China
  • About author:Wang Qing-fu☆, Studying for doctorate, Department of Orthopedics, Wuhan General Hospital of Guangzhou Military Command, Wuhan 430070, Hubei Province, China
  • Supported by:

    Supported by: “Eleventh Five-Year” Project of PLA , No. 06G047*

摘要:

背景:研究表明脂肪干细胞体外特定诱导条件下实现了向骨、软骨、脂肪、肌肉、心肌细胞、神经细胞、上皮细胞以及肝细胞方向分化。
目的:进一步验证脂肪干细胞的分离培养方法及其基本生物学特性,并对细胞表型进行鉴定。
方法:从成年日本大耳白兔的颈背部分离脂肪组织,通过Ⅰ型胶原酶消化法获取原代脂肪干细胞并培养,待细胞生长至约80%融合时传代,用倒置显微镜逐日观察细胞生长情况和形态特征,描绘其生长曲线;流式细胞技术检测细胞表面标记物;将脂肪干细胞行成骨和成脂诱导,分别通过碱性磷酸酶、茜素红、VonKossa(钙结节)染色和油红O染色检测脂肪干细胞成骨分化潜能和成脂分化潜能,以未诱导细胞作为对照组。
结果与结论:体外培养的脂肪干细胞呈梭形纤维样细胞形态,增殖活跃,多次传代后细胞仍保持较强增殖能力,生长曲线呈“S”型。流式细胞仪检测第3,6代脂肪干细胞均高表达CD29、CD44,阳性率超过90%;低表达 CD34、CD45阳性率不超过5%,且CD29、CD44 随着传代表达逐渐增高,CD34、CD45随细胞培养时间延长表达逐渐降低。成骨诱导实验组碱性磷酸酶、茜素红、vonKossa染色阳性,成脂诱导实验组油红O染色阳性,对照组均为阴性。结果证实,兔脂肪干细胞在体外易于分离培养,保持稳定增殖,并表达间充质干细胞相关的表型,特定条件下可诱导分化为成骨细胞和脂肪细胞。

关键词: 脂肪干细胞, 干细胞, 细胞培养, 鉴定, 诱导分化, 成骨诱导, 成脂诱导, CD29, CD44, CD34, CD45

Abstract:

BACKGROUND: Studies have shown that adipose-derived stem cells can be induced to differentiate into osteoblasts, chondrocytes, myocardial cells, neurons, epithelial cells and hepatocytes under certain conditions.
OBJECTIVE: To investigate the isolation and culture method and the basic biological characteristics of adipose-derived stem cells in order to identify its cell phenotype.
METHODS: Adipose tissue was collected from the neck and back of adult Japanese white rabbits, and the primary adipose-derived stem cells were obtained and cultured with type Ⅰ collagenase and when the cells grow to cover about 80% of the space, the growth situation and morphological characteristics of adipose-derived stem cells were observed with inverted microscope every day, and the growth curve was drawn; cell surface markers were checked by flow cytometry; the adipose-derived stem cells were induced to osteogenesis and adipogenesis respectively, the osteogenic differentiation potential and adipogenic differentiation potential were assessed through the alkaline phosphatase, alizarin red, VonKossa (calcium nodules) staining and oil red O staining of adipose-derived stem cells, control group was non-induced.
RESULTS AND CONCLUSION: Adipose-derived stem cells cultured in vitro exhibited a spindle-shaped appearance and actively proliferated. After subculture, adipose-derived stem cells were strongly proliferated and their growth curve was “S” shaped. Passages 3 and 6 adipose-derived stem cells highly expressed CD29 and CD44 as detected by flow cytometry, with a positive rate of more than 90% and lowly expressed CD34 and CD45 with a positive rate of less than 5%; and the expression of CD29 and CD44 was gradually increased while the expression of CD34 and CD45 was gradually decreased with the passage increased. Alkaline phosphatase, alizarin red and von Kossa staining were positive in the osteogenic-induction group and oil red O staining was positive in the adipogenic-induction group, whilethese staining were negative in the control group. Rabbit adipose-derived stem cells could be easily isolated and cultured, and stably proliferated, and they expressed mesenchymal stem cells-related phenotype and could be induced to differentiate into osteoblasts and adipocytes under certain conditions.

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