中国组织工程研究 ›› 2025, Vol. 29 ›› Issue (13): 2698-2705.doi: 10.12307/2025.079

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

旋转细胞培养系统对老年人表皮干细胞增殖和干性维持的影响

张  敏1,2,董溪溪3,黄  萌1,2,王朝祥1,2,张鲁岳1,2,曹均凯2   

  1. 1解放军医学院,北京市   100853;2中国人民解放军总医院第一医学中心,北京市   100853;3中国人民解放军总医院第五医学中心,北京市   100071
  • 收稿日期:2024-02-27 接受日期:2024-05-11 出版日期:2025-05-08 发布日期:2024-09-11
  • 通讯作者: 曹均凯,主任医师,副教授,博士生导师,中国人民解放军总医院第一医学中心口腔科,北京市 100853
  • 作者简介:张敏,女,1990年生,解放军医学院在读硕士,主要从事组织工程和再生医学的研究。
  • 基金资助:
    国家重点研发计划资助(2020YFC2008900),项目负责人:曹均凯

Effect of rotating cell culture system on proliferation and stemness maintenance of epidermal stem cells in the elderly

Zhang Min1, 2, Dong Xixi3, Huang Meng1, 2, Wang Chaoxiang1, 2, Zhang Luyue1, 2, Cao Junkai2   

  1. 1Medical School of Chinese PLA, Beijing 100853, China; 2First Medical Center, Chinese PLA General Hospital, Beijing 100853, China; 3Fifth Medical Center of Chinese PLA General Hospital, Beijing 100071, China
  • Received:2024-02-27 Accepted:2024-05-11 Online:2025-05-08 Published:2024-09-11
  • Contact: Cao Junkai, Chief physician, Associate professor, Doctoral supervisor, First Medical Center, Chinese PLA General Hospital, Beijing 100853, China
  • About author:Zhang Min, Master candidate, Medical School of Chinese PLA, Beijing 100853, China; First Medical Center, Chinese PLA General Hospital, Beijing 100853, China
  • Supported by:
    National Key Research & Development Program Foundation, No. 2020YFC2008900 (to CJK)

摘要:

文题释义:

旋转细胞培养系统:一种具有氧合膜的无气泡的三维动态体外培养系统,可用于培养贴壁细胞或悬浮细胞。该系统使研究人员能够培养出多种高密度的细胞;同时在其他培养方法中不易培养的细胞,在该培养系统中可以更容易地进行培养。
表皮干细胞:是位于皮肤基底层、毛囊隆突处和皮脂腺的慢周期性细胞,具有自我更新和强大的增殖能力。表皮干细胞不仅可以通过向上迁移不断分化成为表皮细胞,维持表皮的更新和稳态;同时也可向下参与毛囊的形成和更新,是皮肤组织工程具有应用前景的种子细胞。

摘要
背景:由于人口老龄化和老年疾病的增加,对老年人表皮干细胞的研究和利用变得越来越重要。但由于老年人表皮干细胞的增殖和干性能力较弱,限制了其在生物医学和临床研究的应用。
目的:探讨旋转细胞培养系统培养的老年人表皮干细胞的增殖和干性维持能力。
方法:采用传统平面培养方法获取儿童(7-12岁)和老年人(60岁以上)表皮干细胞,经细胞形态学和细胞免疫荧光鉴定后,通过流式细胞术、CCK-8、细胞克隆形成实验分析儿童和老年人表皮干细胞增殖能力的差异;采用旋转细胞培养系统和3D TableTrix®微载体培养儿童和老年人表皮干细胞,通过活/死染色、细胞倍增效率、细胞倍增时间以及实时定量聚合酶链反应检测细胞增殖情况以及干性标志物的表达。
结果与结论:①在平面培养条件下,儿童组表皮干细胞较老年组具有更强的增殖能力;②与平面培养相比,经旋转细胞培养系统动态培养的老年人表皮干细胞的细胞倍增效率更高(P < 0.01),细胞倍增时间更短(P < 0.01);③旋转细胞培养系统动态培养促使老年人表皮干细胞自组装形成基于微载体支架的三维细胞球,具有和儿童组表皮干细胞相似的增殖情况;④动态培养后的老年人表皮干细胞在干性标记物基因(ITGA6和ITGB1)、基底细胞标记物基因(K5)和分化标记物基因(K10和K1)表达上可达到和儿童组相近的表达水平。结果表明:旋转细胞培养系统动态培养不仅可以提高老年人表皮干细胞的培养效率,促进细胞增殖和自组装成三维细胞球,而且可维持老年人表皮干细胞一定的干性,未发生完全终末分化。

https://orcid.org/0000-0001-6601-4905 (曹均凯);https://orcid.org/0000-0001-5795-2238 (张敏)

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: 人表皮干细胞, 老年人, 旋转细胞培养系统, 微载体, 三维动态培养, 干性, 增殖

Abstract: BACKGROUND: Due to the aging population and the increase in elderly diseases, research and utilization of epidermal stem cells in the elderly have become increasingly important. However, due to the weak proliferation and drying ability of epidermal stem cells in the elderly, their application in biomedical and clinical research is limited.
OBJECTIVE: To investigate the ability of rotating cell culture system to promote the proliferation and maintenance of epidermal stem cells in elderly individuals. 
METHODS: Epidermal stem cells were obtained from children (7-12 years old) and the elderly (over 60 years old) using traditional planar culture methods. After identification by cell morphology and cell immunofluorescence, the differences in proliferation ability of epidermal stem cells between the children and the elderly were analyzed by flow cytometry, CCK-8 assay, and cell clone formation assay. Elderly epidermal stem cells were cultured using a rotating cell culture system and 3D TableTrix® microcarriers. The cell proliferation and expression of stemness markers were detected by Live/Dead staining, cell doubling efficiency, cell doubling time, and real-time quantitative polymerase chain reaction.
RESULTS AND CONCLUSION: (1) Under planar culture conditions, the children group had stronger proliferative ability than the elderly group. (2) Compared with planar culture, the dynamic cultivation of elderly epidermal stem cells using a rotating cell culture system had a higher population doubling (P < 0.01) and a shorter population doubling time (P < 0.01). (3) The dynamic cultivation of rotating cell culture system promoted the self-assembly of elderly epidermal stem cells to form 3D human epidermal stem cell spheres based on microcarrier scaffolds, which had similar epidermal stem cell proliferation as the children group. (4) After dynamic culture, the expression of stemness marker genes (ITGA6 and ITGB1), basal cell marker genes (K5) and differentiation marker genes (K10 and K1) of elderly epidermal stem cells reached the same level as that of children. The results showed that the dynamic cultivation of rotating cell culture system can not only improve the efficiency of elderly epidermal stem cell culture, promote cell proliferation and self-assembly into 3D cell spheres, but also maintain a certain stemness of elderly epidermal stem cells without complete terminal differentiation.

Key words: human epidermal stem cell, the elderly, rotating cell culture system, microcarriers, 3D dynamics culture, stemness, proliferation

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