中国组织工程研究 ›› 2015, Vol. 19 ›› Issue (32): 5182-5187.doi: 10.3969/j.issn.2095-4344.2015.32.018

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

脂肪源性干细胞体外分离培养及向内皮祖细胞的诱导分化

刘子琪,孙同文,万有栋,姚  瑞,阚全程   

  1. 郑州大学第一附属医院综合ICU,河南省郑州市  450052
  • 出版日期:2015-08-06 发布日期:2015-08-06
  • 通讯作者: 孙同文,博士,主任医师,郑州大学第一附属医院综合ICU,河南省郑州市 450052
  • 作者简介:刘子琪,女,1989年生,河南省商丘市人,汉族,郑州大学在读硕士,主要从事重症医学专业研究。
  • 基金资助:

    国家自然科学基金(81370364);河南省卫生科技创新人才工程专项基金

Adipose-derived stem cells: isolation, culture and differentiation into endothelial progenitor cells  

Liu Zi-qi, Sun Tong-wen, Wan You-dong, Yao Rui, Kan Quan-cheng   

  1. Department of ICU, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
  • Online:2015-08-06 Published:2015-08-06
  • Contact: Sun Tong-wen, M.D., Chief physician, Department of ICU, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
  • About author:Liu Zi-qi, Studying for master’s degree, Department of ICU, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81370364; the Special Fund for Medical Innovative Talents of Henan Province

摘要:

背景:脂肪源性干细胞是目前组织工程种子细胞的研究热点,通常采用胶原酶消化脂肪组织来获得,但是存在着操作繁琐,花费高等不足。
目的:观察组织块培养法分离的脂肪源性干细胞的基本生物学特性及其向骨细胞、脂肪细胞及内皮祖细胞的诱导分化潜能。
方法:无菌条件下切取大鼠双侧腹股沟脂肪组织,组织块法分离培养脂肪源性干细胞,CCK-8法检测细胞增殖活性,流式细胞仪分析干细胞表面标志表达。取第4代脂肪源性干细胞用成骨诱导液、成脂诱导液、内皮祖细胞诱导液培养两三周并进行鉴定。
结果与结论:组织块培养法得到的脂肪源性干细胞易扩增,传代后以长梭形细胞生长为主,呈漩涡状排列,克隆样生长;经多次传代仍能保持较强的增殖能力,细胞生长曲线呈抛物线形;细胞表面标志CD44、CD90、CD29呈阳性表达,CD45、CD31呈阴性表达。成脂诱导后细胞油红O染色阳性、成骨诱导后细胞茜素红染色阳性。诱导后的内皮祖细胞CD34及DiI-ac-LDL和FITC-UEA-1双荧光染色阳性。以上结果显示组织块培养法能成功分离培养出脂肪源性干细胞,且获得的细胞纯度较高、易于增殖培养,能高表达干细胞表面抗原以及具有向骨细胞、脂肪细胞及内皮祖细胞多向分化的潜能,可以满足组织工程研究种子细胞的需求。

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

关键词: 干细胞, 脂肪干细胞, 内皮祖细胞, 脂肪源性干细胞, 组织块培养法, 分离, 培养, 诱导, 国家自然科学基金

Abstract:

BACKGROUND: Adipose-derived stem cells are regarded as the potential seed cells for tissue engineering. Collagenase digestion is used to isolate adipose-derived stem cells from fat pads currently. However, there are some problems, such as cumbersome operation and high cost.
OBJECTIVE: To study the basic biological characteristics of adipose-derived stem cells by tissue explants culture and to explore the differentiation potential into osteoblasts, adipocytes and endothelial progenitor cells in vitro.
METHODS: Adipose-derived stem cells were isolated by tissue explants technique from the bilateral groin fat pads of rats under aseptic conditions, and cultured in vitro. Cell counting kit-8 was used to detect the proliferative activity, and flow cytometry was employed to analyze the expression of cell surface markers. Passage 4 adipose-derived stem cells were cultured in osteogenic medium, adipogenic medium and endothelial progenitor cell medium for 2-3 weeks, and then the cells were identified.
RESULTS AND CONCLUSION: Adipose-derived stem cells that were isolated by tissue explants culture were easily cultured, and after subculture, cells were mainly spindle-shaped and grew in clone-like manner with swirling arrangement. Cells that experienced repeated subcultures still kept stronger proliferative ability and the cell growth curve was shaped as a parabola. Immunochemical staining analysis revealed that adipose-derived 
stem cells were positive for CD44, CD90 and CD29, but negative for CD31, CD45. After adipogenic/osteogenic induction, the cells were respectively positive for oil red O staining and alizarin red staining. Induced endothelial progenitor cells were identified with CD34 and the ability to uptake Dil-ac-LDL and FITC-UEA. These findings indicate using the using tissue explants culture, high-purity adipose-derived stem cells easy to proliferate can be harvested, highly express stem cells-related antigens, and have the ability to differentiate into osteoblasts, adipocytes and endothelial progenitor cells, which meet the needs of seed cells in tissue engineering research.

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: Stem Cells, Adipose Tissue, Cell Differentiation, Endothelial Cells

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