脂肪来源干细胞的生物学特性及细胞表型

中国组织工程研究与临床康复第14卷第36期 2010–09–03出版

Journal of Clinical Rehabilitative Tissue Engineering Research September 3, 2010 Vol.14, No.36 ISSN 1673-8225 CN 21-1539/R CODEN: ZLKHAH

6685 1Department of

Plastic Surgery, Sichuan Academy of Medical Sciences, Sichuan Provincial People’s Hospital, Chengdu 610072, Sichuan Province, China; 2Seventh Department of Plastic Surgery, Plastic Surgery Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100144, China

Cai Zhen☆, Doctor, Attending physician, Department of Plastic Surgery, Sichuan Academy of Medical Sciences, Sichuan Provincial People’s Hospital, Chengdu 610072, Sichuan Province, China caizhen1976@126. com

Correspondence to: Jiang Hai-yue, Professor, Doctoral supervisor, Seventh Department of Plastic Surgery, Plastic Surgery Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100144, China jianghaiyue@sohu. com

Received:2010-05-28 Accepted:2010-06-24

脂肪来源干细胞的生物学特性及细胞表型☆

蔡震1，潘博2，林琳2，蒋海越2，庄洪兴2

Biological characteristics and phenotypes of adipose tissue-derived stem cells

Cai Zhen1, Pan Bo2, Lin Lin2, Jiang Hai-yue2, Zhuang Hong-xing2

Abstract

BACKGROUND: Adipose-derived stem cells (ADSCs) are capable of multi-directional differentiation and exist in human processed lipoaspirate. However, no in-depth studies have addressed biological characteristics of adipose tissue-derived stem cells (ADSCs) in vitro, and there are some disputes on the results from phenotype studies.

OBJECTIVE: To investigate biological characteristics and phenotypes of human ADSCs.

METHODS: Human adipose tissue was collected from persons undergoing fat extraction. The ADSCs were digested with collagenase, cultured and subcultured in vitro. Cell morphology was observed and growth curves were drawn. The phenotypes of ADSCs were identified by immunohistochemistry and flow cytometry.

RESULTS AND CONCLUSION: ADSCs grew well, presented fibroblast-like growth. No significant change in cell morphology was detected within passage 15. The results from immunohistochemistry showed that cells were positive for CD29, CD44, CD105, but negative for CD34, CD45. Flow cytometry results have shown that cells were positive for CD29, CD44, CD105, MHC-Ⅰ, but negative for CD3, CD14, CD19, CD31, CD33, CD34, CD45, CD106, CD117, CD184. Results have suggested that ADSCs can be abundantly harvested and have stable proliferation in poorly differentiated status in vitro. Stem cell-related antigens were highly expressed in ADSCs.

Cai Z, Pan B, Lin L, Jiang HY, Zhuang HX. Biological characteristics and phenotypes of adipose tissue-derived stem cells. Zhongguo Zuzhi Gongcheng Yanjiu yu Linchuang Kangfu. 2010;14(36): 6685-6688.

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摘要

背景：研究证实脂肪组织提取物中存在脂肪来源的干细胞，并表现出多向分化的潜能，但是关于其体外的生物学特性研究不够深入，其细胞表型的研究结果存在一定争议。

目的：观察脂肪来源的干细胞的生物学特性与细胞免疫表型。

方法：取吸脂手术中废弃的人脂肪组织，胶原酶消化法获得脂肪来源的干细胞，体外传代培养，并进行细胞形态学观察，细胞生长曲线测定，免疫组织化学及流式细胞仪检测其细胞表型。

结果与结论：脂肪来源的干细胞生长旺盛，呈成纤维细胞样生长，15代以内细胞形态未见明显变化；免疫组织化学染色显示，细胞表面标记CD29，CD44，CD105表达阳性，CD34，CD45表达阴性；流式细胞仪检测显示，CD29，CD44，CD105，MHC-Ⅰ为阳性，CD3，CD14，CD19，CD31，CD33，CD34，CD45，CD106，CD117，CD184为阴性。结果说明脂肪来源的干细胞体外生长能力旺盛，高表达干细胞相关抗原，可长期传代且保持低分化状态。

关键词：表型；脂肪来源的干细胞；流式细胞仪；生物学特性；干细胞

doi:10.3969/j.issn.1673-8225.2010.36.008

蔡震，潘博，林琳，蒋海越，庄洪兴.脂肪来源干细胞的生物学特性及细胞表型[J].中国组织工程研究与临床康复，2010，14(36):6685-6688. [ ]

0 引言

间充质干细胞是一群存在于身体各个组织内较原始的细胞，具有自我更新及多向分化潜能[1]，基于这些能力，间充质干细胞在其临床应用上有很大的潜力。自2001年Zuk证实了经吸脂术获得的脂肪组织中存在具有多向分化潜能的细胞群后[2]，脂肪来源的干细胞(adipose tissue-derived stem cells, ADSCs)的概念得以明确，ADSCs因为其取材容易也被广泛研究。有研究表明ADSCs在体外培养中能迅速增长，累积细胞倍增数在第13代时仍无明显的下降趋势；更为重要的是细胞传至第10代时，仅有5%的细胞进入了细胞衰老期。因此ADSCs可以作为组织工程的种子细胞，成为具有广阔治疗应用前景。关于ADSCs的细胞表型研究，目前的研究结果没有得到统一的认定。本课题通过对ADSCs进行体外培养及对其体外生长的生物学性状及其细胞免疫表型做初步研究，为以后深入进行细胞组织工程的应用研究奠定了实验室基础。

1 材料和方法

设计：细胞体外培养与鉴定。

时间及地点：于2008-01/2008-06在中国医学科学院整形外科医院中心实验室完成。

材料：

实验标本：来自中国医学科学院整形外科医