中国组织工程研究 ›› 2023, Vol. 27 ›› Issue (33): 5277-5282.doi: 10.12307/2023.754

• 骨髓干细胞 bone marrow stem cells • 上一篇    下一篇

高表达软骨调素1骨髓间充质干细胞来源外泌体促进骨关节炎软骨细胞的增殖

吴志文1,申恩谱1,李贝贝1,刘丹平1,綦  惠2   

  1. 1锦州医科大学附属第一医院,辽宁省锦州市   121000;2北京市创伤骨科研究所,北京积水潭医院,北京市   100035
  • 收稿日期:2022-11-09 接受日期:2022-12-12 出版日期:2023-11-28 发布日期:2023-03-29
  • 通讯作者: 刘丹平,博士,教授,主任医师,博士生导师,锦州医科大学附属第一医院,辽宁省锦州市 121000 綦惠,博士,副研究员,北京市创伤骨科研究所,北京积水潭医院,北京市 100035
  • 作者简介:吴志文,男,1995年生,汉族,锦州医科大学在读硕士,主要从事软骨损伤方向研究。
  • 基金资助:
    国家自然科学基金项目(81572140),项目负责人:刘丹平

Exosomes derived from bone marrow mesenchymal stem cells with chondromodulin-1 overexpression affect the proliferation of chondrocytes in osteoarthritis

Wu Zhiwen1, Shen Enpu1, Li Beibei1, Liu Danping1, Qi Hui2   

  1. 1First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121000, Liaoning Province, China; 2Beijing Institute of Trauma Orthopedics, Beijing Jishuitan Hospital, Beijing 100035, China
  • Received:2022-11-09 Accepted:2022-12-12 Online:2023-11-28 Published:2023-03-29
  • Contact: Liu Danping, MD, Professor, Chief physician, Doctoral supervisor, First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121000, Liaoning Province, China Qi Hui, PhD, Assistant researcher, Beijing Institute of Trauma Orthopedics, Beijing Jishuitan Hospital, Beijing 100035, China
  • About author:Wu Zhiwen, Master candidate, First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121000, Liaoning Province, China
  • Supported by:
    the National Natural Science Foundation of China, No. 81572140 (to LDP)

摘要:


文题释义:

软骨调素1慢病毒转染的骨髓间充质干细胞来源外泌体:提取自软骨调素1慢病毒转染的骨髓间充质干细胞,能够被骨关节炎软骨细胞摄取进入胞内,在胞内高度表达软骨调素1。
骨关节炎软骨细胞:由于炎症作用,软骨细胞表型发生改变,主要向肥大表性转化。

背景:软骨调素1(chondromodulin-1,Chm-1)在正常软骨中大量表达,具有抑制血管生成、阻止软骨细胞肥大、缓解骨关节炎发展的功能,在骨关节炎发生和发展中发挥着重要作用。
目的:探讨高表达Chm-1骨髓间充质干细胞来源外泌体对骨关节炎环境中软骨细胞增殖的影响。
方法:分离大鼠骨髓间充质干细胞并进行培养及鉴定;Chm-1慢病毒和空载慢病毒转染骨髓间充质干细胞,超高速离心法提取细胞培养上清液中外泌体(Chm-1-Exos和NC-Exos)。白细胞介素1β 作用软骨细胞24 h构建体外骨关节炎模型,随后分别用2种外泌体处理7 d,将PBS处理的骨关节炎软骨细胞作为对照组。共聚焦显微镜观察骨关节炎软骨细胞对外泌体的摄取情况;CCK-8评估各组骨关节炎软骨细胞增殖能力;Western blot检测2种外泌体中Chm-1的表达;Western blot和RT-qPCR方法分别检测各组骨关节炎软骨细胞中Ⅱ型胶原、SOX9、AGG蛋白和mRNA的表达。

结果与结论:①骨髓间充质干细胞呈典型纺锤状形态且具备三系分化能力;②带有绿色荧光的慢病毒成功转染骨髓间充质干细胞;③外泌体直径在40-150 nm之间,且均表达其特异性标志蛋白CD63、CD81、TSG101,能够被骨关节炎软骨细胞摄取;④相比于NC-Exos,Chm-1-Exos中Chm-1的表达更高(P < 0.05);⑤NC-Exos和Chm-1-Exos分别作用骨关节炎软骨细胞24 h后,Chm-1-Exos组骨关节炎软骨细胞活性更强;⑥NC-Exos和Chm-1-Exos分别作用骨关节炎软骨细胞7 d后,Chm-1-Exos组的Ⅱ型胶原、SOX9、AGG蛋白和mRNA表达更高(P < 0.05);⑦上述实验结果表明,Chm-1-Exos能够显著促进骨关节炎软骨细胞的增殖。

https://orcid.org/0000-0002-7233-6975 (吴志文) 

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: 骨关节炎, 骨髓间充质干细胞, 外泌体, 软骨细胞, Chm-1

Abstract: BACKGROUND: Chondromodulin-1 (Chm-1), which is highly expressed in normal cartilage, can inhibit angiogenesis, prevent chondrocyte hypertrophy and alleviate the development of osteoarthritis. Chm-1 plays an important role in the occurrence and development of osteoarthritis.  
OBJECTIVE: To investigate the effect of exosomes (Exos) derived from bone marrow mesenchymal stem cells with high expression of Chm-1 on the proliferation of chondrocytes in osteoarthritis.
METHODS: Rat bone marrow mesenchymal stem cells were isolated, cultured and identified. Bone marrow mesenchymal stem cells were transfected with Chm-1 lentivirus and no-load lentivirus. NC-Exos and Chm-1-Exos in the supernatant of cell culture were extracted by ultra-high speed centrifugation. The model of osteoarthritis in vitro was established by treating chondrocytes with interleukin-1 β for 24 hours. Then osteoarthritis chondrocytes were treated with NC-Exos and Chm-1-Exos for 7 days, respectively, and PBS-treating osteoarthritis chondrocytes were used as a control group. The Exos uptake of osteoarthritis chondrocytes was observed by a confocal microscope. The proliferation of osteoarthritis chondrocytes was evaluated by CCK-8 assay. Expression levels of Chm-1 in NC-Exos and Chm-1-Exos were detected by western blot assay. The protein and mRNA expression levels of Col II, SOX9 and AGG in osteoarthritis chondrocytes were detected by western blot assay and RT-qPCR, respectively.  
RESULTS AND CONCLUSION: (1) Bone marrow mesenchymal stem cells showed a typical fusiform shape and had the ability to differentiate into three lines. (2) Lentivirus with green fluorescence was successfully transfected into bone marrow mesenchymal stem cells. (3) Exos, whose size was between 40-150 nm, could be absorbed by osteoarthritis chondrocytes and expressed their specific marker proteins CD63, CD81 and TSG101. (4) Compared with NC-Exos, Chm-1-Exos expressed higher proteins of Chm-1 (P < 0.05). (5) At 24 hours after treatment, compared with the NC-Exos group, the Chm-1-Exos group presented higher cell viability. (6) At 7 days after treatment, compared with the NC-Exos group, the Chm-1-Exos group showed higher protein and mRNA expression levels of Col II, SOX9 and AGG (P < 0.05). (7) The above experimental results have shown that Chm-1-Exos can promote the proliferation of osteoarthritis chondrocytes.

Key words: osteoarthritis, bone marrow mesenchymal stem cell, exosome, chondrocyte, Chm-1

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