中国组织工程研究 ›› 2026, Vol. 30 ›› Issue (1): 68-77.doi: 10.12307/2025.982

• 脐带脐血干细胞 umbilical cord blood stem cells • 上一篇    下一篇

无支架三维人脐带间充质干细胞分泌组修复小鼠皮肤损伤

马文静1,张晋豫1,姜明霞2,修冰水2,白  睿3,刘玉含4,陈旭义4,袁增强1,刘志强1   

  1. 1南华大学衡阳医学院,军事科学院军事医学研究院研究生协作培养基地,湖南省衡阳市  421001;2潍坊医学院附属医院,烟台市莱阳中心医院,山东省烟台市  265299;3解放军第六医学中心心血管病医学部,北京市  100853;4武警特色医学中心,天津市  300162
  • 收稿日期:2024-10-15 接受日期:2024-12-06 出版日期:2026-01-08 发布日期:2025-06-19
  • 通讯作者: 刘志强,博士,研究员,南华大学衡阳医学院,军事科学院军事医学研究院研究生协作培养基地,湖南省衡阳市 421001; 共同通讯作者:袁增强,博士,研究员,南华大学衡阳医学院,军事科学院军事医学研究院研究生协作培养基地,湖南省衡阳市 421001 https://orcid.org/0009-0001-4329-0779(马文静)
  • 作者简介:马文静,女,1999年生,青海省海东市人,汉族,南华大学衡阳医学院,军事科学院军事医学研究院研究生协作培养基地生物学专业在读硕士,主要从事干细胞研究。
  • 基金资助:
    国家自然科学基金项目(82200295),项目负责人:白睿

Scaffold-free three-dimensional human umbilical cord mesenchymal stem cell secretome repairs mouse skin injury

Ma Wenjing1, Zhang Jinyu1, Jiang Mingxia2, Xiu Bingshui2, Bai Rui3, Liu Yuhan4, Chen Xuyi4, Yuan Zengqiang1, Liu Zhiqiang1   

  1. 1Hengyang Medical School, University of South China, Postgraduate Cooperative Training Base of Institute of Military Cognition and Brain Sciences, Hengyang 421001, Hunan Province, China; 2Yantai Laiyang Central Hospital, Affiliated Hospital of Weifang Medical College, Yantai 265299, Shandong Province, China; 3Cardiovascular Medicine Department of Sixth Medical Center of People's Liberation Army, Beijing 100853, China; 4Armed Police Characteristic Medical Center, Tianjin 300162, China
  • Received:2024-10-15 Accepted:2024-12-06 Online:2026-01-08 Published:2025-06-19
  • Contact: Liu Zhiqiang, MD, Researcher, Hengyang Medical School, University of South China, Postgraduate Cooperative Training Base of Institute of Military Cognition and Brain Sciences, Hengyang 421001, Hunan Province, China; Co-corresponding author: Yuan Zengqiang, MD, Researcher, Hengyang Medical School, University of South China, Postgraduate Cooperative Training Base of Institute of Military Cognition and Brain Sciences, Hengyang 421001, Hunan Province, China
  • About author:Ma Wenjing, Master candidate, Hengyang Medical School, University of South China, Postgraduate Cooperative Training Base of Institute of Military Cognition and Brain Sciences, Hengyang 421001, Hunan Province, China
  • Supported by:
    National Natural Science Foundation of China, No. 82200295 (to BR)

摘要:

文题释义:

无支架三维细胞培养:在没有可黏附生长的环境中,细胞在重力作用下自组装形成类似于微组织的球状体,比常规二维细胞培养更能模拟细胞在生物体内的生理环境。
间充质干细胞分泌组:指间充质干细胞培养过程中分泌至细胞外空间的各种分子或细胞外囊泡,由间充质干细胞培养上清液去除杂质后获得,通过各种可溶性分子(如生长因子、趋化因子)及外泌体介导了间充质干细胞的大部分治疗作用,并且能避免细胞移植的弊端。

摘要
背景:间充质干细胞分泌组中含有生物活性物质、细胞因子及生长因子等,三维细胞培养可调控间充质干细胞内含物的分泌,有望提升损伤修复的潜能。
目的:探讨三维培养人脐带间充质干细胞分泌组对小鼠皮肤损伤的修复效果。
方法:用常规二维培养皿和96孔U底细胞培养板培养人脐带间充质干细胞,收集其分泌组分,RT-qPCR检测人脐带间充质干细胞中皮肤损伤修复相关分泌因子基因表达水平,酶联免疫吸附实验检测人脐带间充质干细胞分泌组中皮肤损伤修复相关因子的蛋白表达水平;使用永生化人脐静脉内皮细胞迁移模型检测人脐带间充质干细胞分泌组的血管损伤修复潜能。建立小鼠皮肤损伤模型,经皮下注射人脐带间充质干细胞分泌组,通过伤口愈合率和组织病理学分析验证皮肤损伤的修复效果。 
结果与结论:①培养3 d后,二维培养的人脐带间充质干细胞呈成纤维细胞样漩涡状生长,三维培养的人脐带间充质干细胞为均一微球体;②与二维培养相比,三维培养的人脐带间充质干细胞中转化生长因子β、碱性成纤维细胞生长因子mRNA表达水平显著升高;③与二维培养相比,三维培养的人脐带间充质干细胞分泌组中血管内皮细胞生长因子、白细胞介素10、粒细胞巨噬细胞集落刺激因子蛋白表达水平显著升高;④与二维培养相比,三维培养的人脐带间充质干细胞分泌组可显著促进永生化人脐静脉内皮细胞的迁移;⑤与未处理对照组和二维培养的人脐带间充质干细胞分泌组相比,三维培养的人脐带间充质干细胞分泌组可显著加快小鼠皮肤伤口愈合速率和伤口皮肤结构重塑。研究结果表明:三维培养可提高人脐带间充质干细胞的旁分泌因子表达,其分泌组可显著促进小鼠皮肤损伤修复。

关键词: 脐带间充质干细胞, 三维细胞培养, 旁分泌, 分泌组, 细胞迁移, 皮肤缺损, 伤口愈合, 工程化干细胞

Abstract: BACKGROUND: The mesenchymal stem cell secretome contains bioactive substances, cytokines, and growth factors. Three-dimensional cell culture can regulate the secretion of these components, potentially enhancing the ability to promote injury repair.
OBJECTIVE: To investigate the repair effect of three-dimensional cultured human umbilical cord mesenchymal stem cell secretome on skin injuries in mice.
METHODS: Human umbilical cord mesenchymal stem cells were cultured in conventional two-dimensional culture dishes and 96-well U-bottom cell culture plates, from which their secretory components were subsequently collected. The expression of skin damage repair related secretory factors in umbilical cord mesenchymal stem cells was analyzed using RT-qPCR. The protein expression level of skin damage repair related factors in umbilical cord mesenchymal stem cell secretome was detected using enzyme-linked immunosorbent assay. The potential of human umbilical cord mesenchymal stem cell secretome to repair vascular injuries was evaluated using an immortalized human umbilical vein endothelial cell migration model. A mouse skin injury model was established, and the human umbilical cord mesenchymal stem cell secretome was injected subcutaneously. Repair effects on skin injury were assessed through wound healing rates and histopathological analysis.
RESULTS AND CONCLUSION: (1) After three days of cultivation, human umbilical cord mesenchymal stem cells cultured in two dimensions exhibited a fibroblast-like, swirling growth pattern, whereas three-dimensional culture led to the formation of uniform microspheres. (2) Compared with two-dimensional culture, three-dimensional culture significantly increased the mRNA expression of transforming growth factor β and basic fibroblast growth factor in human umbilical cord mesenchymal stem cells. (3) Compared with two-dimensional culture, three-dimensional cultured human umbilical cord mesenchymal stem cell secretome significantly enhanced the protein expression of vascular endothelial growth factor, interleukin-10, and granulocyte-macrophage colony-stimulating factor in the human umbilical cord mesenchymal stem cell secretome. (4) Compared with two-dimensional culture, three-dimensional cultured human umbilical cord mesenchymal stem cell secretome significantly promoted the migration of immortalized human umbilical cord mesenchymal stem cells. (5) Compared with the untreated control group and the two-dimensional cultured human umbilical cord mesenchymal stem cell secretome, the three-dimensional cultured human umbilical cord mesenchymal stem cell secretome can significantly accelerate the skin wound healing rate and wound skin structure remodeling in mice. These results indicate that three-dimensional culture can enhance the expression of paracrine factors of human umbilical cord mesenchymal stem cells, and their secretome can significantly promote the repair of mouse skin damage.

Key words: umbilical cord mesenchymal stem cell, three-dimensional cell culture, paracrine, secretome, cell migration, skin defect, wound healing, engineered stem cell

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