中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (31): 5002-5007.doi: 10.12307/2022.969

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

改良法原代培养人脂肪间充质干细胞及其鉴定

王  慧1,王翠菊2,郑钧元1,王  华3,郭宝娟1,陈  培1,杨旭芳1   

  1. 牡丹江医学院,1病理生理学教研室,2形态学实验室,黑龙江省牡丹江市   157000;3牡丹江心血管病医院放射诊疗中心,黑龙江省牡丹江市   157000
  • 收稿日期:2021-12-09 接受日期:2022-02-08 出版日期:2022-11-08 发布日期:2022-04-24
  • 通讯作者: 杨旭芳,博士,副教授,牡丹江医学院病理生理学教研室,黑龙江省牡丹江市 157000
  • 作者简介:王慧,女,1996年生,陕西省榆林市人,汉族,牡丹江医学院在读硕士,主要从事干细胞成骨分化与骨组织工程学研究。
  • 基金资助:
    牡丹江市应用技术研究与开发计划项目(HT2020JG084),项目负责人:杨旭芳

Modified primary culture and identification of human adipose-derived mesenchymal stem cells

Wang Hui1, Wang Cuiju2, Zheng Junyuan1, Wang Hua3, Guo Baojuan1, Chen Pei1, Yang Xufang1   

  1. 1Department of Pathophysiology, 2Laboratory of Morphology, Mudanjiang Medical University, Mudanjiang 157000, Heilongjiang Province, China; 3Radiation Diagnosis and Treatment Center, Mudanjiang Cardiovascular Hospital, Mudanjiang 157000, Heilongjiang Province, China
  • Received:2021-12-09 Accepted:2022-02-08 Online:2022-11-08 Published:2022-04-24
  • Contact: Yang Xufang, MD, Associate professor, Department of Pathophysiology, Mudanjiang Medical University, Mudanjiang 157000, Heilongjiang Province, China
  • About author:Wang Hui, Master candidate, Department of Pathophysiology, Mudanjiang Medical University, Mudanjiang 157000, Heilongjiang Province, China
  • Supported by:
    Mudanjiang Applied Technology Research and Development Plan Project, No. HT2020JG084 (to YXF)

摘要:

文题释义:
胶原酶消化法:该方法是获取脂肪间充质干细胞最常用的方法,目前对于酶的类型、浓度以及消化所需时间等没有统一的标准。酶消化时间足够充分时能够在较短的时间内获得足量的原代脂肪间充质干细胞,但在酶的影响下细胞活力和增殖能力会变差。
胶原酶Ⅰ消化联合组织块培养法:0.01 mol/L无菌PBS冲洗脂肪组织至无血色,将组织用无菌眼科剪刀和镊子清理干净后剪成约1 mm3大小,加入适量的0.1%Ⅰ型胶原酶,37 ℃下振荡消化30 min;用含体积分数10%胎牛血清的培养基终止消化并离心(1 000 r/min,15 min);弃掉离心后的混悬液上清,将未消化完全的组织块及下层的细胞团重悬,混匀后接种至培养皿,放入37 ℃,体积分数5%CO2培养箱中培养。

背景:采用常规酶消化法提取人脂肪间充质干细胞,由于消化的时间过长,导致获得的细胞活性变差,为满足组织工程对种子细胞数量的需求,该实验旨在寻找一种改良的人脂肪间充质干细胞培养方法。
目的:胶原酶Ⅰ消化联合组织块培养法获取人脂肪间充质干细胞并进行相关生物学特性的鉴定。
方法:将脂肪组织剪碎后分别应用胶原酶Ⅰ消化联合组织块培养法、常规胶原酶消化法进行培养;通过锥虫蓝拒染法计数细胞,比较不同方法获取细胞的产量、活力及增殖能力;利用流式细胞仪检测改良组细胞表面抗原CD105、CD73与CD44的表达;成骨或成脂诱导后,用碱性磷酸酶染色和油红O染色鉴定细胞分化能力。
结果与结论:①胶原酶Ⅰ消化联合组织块培养法获取的细胞数量远多于常规酶消化法;②胶原酶Ⅰ消化联合组织块培养法获取的人脂肪间充质干细胞增殖能力强,细胞活力好,比常规酶消化法早1 d进入平台期,传代一次需5 d左右;③第3代改良组人脂肪间充质干细胞CD105、CD73与CD44表达均呈阳性,且纯度均达93%以上;④改良法获取的人脂肪间充质干细胞有良好的成骨与成脂分化能力;⑤结果表明,胶原酶Ⅰ消化法联合组织块培养法较常规酶消化法可获得数量多、活力好、增殖能力强的人脂肪间充质干细胞,且能够稳定传代,具有良好的分化能力,这满足了组织工程学的需求。

https://orcid.org/0000-0002-5233-4016 (王慧) 

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: 人脂肪间充质干细胞, 原代培养, 胶原酶Ⅰ消化法, 组织块培养法, 改良, 产量, 增殖, 活力, 分化

Abstract: BACKGROUND: Human adipose-derived mesenchymal stem cells were extracted by conventional enzymatic digestion. The long-term digestion resulted in poor cell viability. To meet the demand for the number of seed cells in tissue engineering, this experiment aimed to find a modified human adipose-derived mesenchymal stem cell culture method.  
OBJECTIVE: Human adipose-derived mesenchymal stem cells were obtained by collagenase I digestion combined with tissue block culture method and the relevant biological characteristics were identified.
METHODS: The adipose tissue was cut up and cultured with collagenase I digestion combined with tissue block culture and conventional collagenase digestion method. Cells were counted by trypan blue exclusion method. The yield, viability and proliferation ability of cells obtained by different methods were compared. The expression of cell surface antigens CD105, CD73 and CD44 was tested by flow cytometry in the modified group. After osteogenic or adipogenic induction, alkaline phosphatase staining and oil red O staining were used to identify cell differentiation ability.
RESULTS AND CONCLUSION: (1) The number of cells obtained by collagenase I digestion combined with tissue block culture method was far more than that obtained by conventional enzyme digestion method. (2) The cells obtained by collagenase I digestion combined with tissue block culture had the strong proliferation ability and good cell viability. They entered the plateau phase 1 day earlier than the conventional collagenase digestion method, and each passage took about 5 days. (3) The expression of CD105, CD73 and CD44 was positive in the modified group of P3 generation, and the purity was over 93%. (4) Human adipose-derived mesenchymal stem cells obtained by the modified method had good osteogenic and adipogenic differentiation capabilities. (5) The results showed that the collagenase I digestion method combined with tissue block culture method could obtain a large number of human adipose-derived mesenchymal stem cells with better viability and proliferation ability than the conventional enzymatic digestion method, and they could be passaged stably with a good differentiation ability, which met the needs of tissue engineering. 

Key words: human adipose-derived mesenchymal stem cells, primary culture, collagenase I digestion method, tissue block culture method, modification, yield, proliferation, vitality, differentiation

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