中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (33): 5281-5285.doi: 10.3969/j.issn.2095-4344.0661

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

骨髓间充质干细胞体外成软骨分化的形态学变化

王志聪1,刘跃洪1,周 庆1,陈 曦1,周 宇1,孙慧君2,刘谟震3   

  1. 1德阳市人民医院骨科,四川省德阳市 618000;2大连医科大学药学院,辽宁省大连市 116044;3大连医科大学附属第一医院骨科,辽宁省大连市 116011
  • 修回日期:2018-07-12 出版日期:2018-11-28 发布日期:2018-11-28
  • 通讯作者: 刘跃洪,主任医师,德阳市人民医院骨科,四川省德阳市 618000; 并列通讯作者:刘谟震,博士,主任医师,教授,硕士生导师,大连医科大学附属第一医院骨科,辽宁省大连市 116044
  • 作者简介:王志聪,男,1988年生,硕士,医师,主要从事关节软骨损伤组织工程修复方面的研究。
  • 基金资助:

    国家自然科学基金(81273508,81350017);2017年四川省卫生和计划生育委员会重点科研项目(17ZD023)

Morphological characteristics of bone marrow mesenchymal stem cells differentiating into chondrocytes in vitro

Wang Zhi-cong1, Liu Yue-hong1, Zhou Qing1, Chen Xi1, Zhou Yu1, Sun Hui-jun2, Liu Mo-zhen3   

  1. 1Department of Orthopedics, People’s Hospital of Deyang City, Deyang 618000, Sichuan Province, China; 2School of Clinical Pharmacology, Dalian Medical University, Dalian 116044, Liaoning Province, China; 3Department of Orthopedics, the First Affiliated Hospital of Dalian Medical University, Dalian 116011, Liaoning Province, China
  • Revised:2018-07-12 Online:2018-11-28 Published:2018-11-28
  • Contact: Liu Yue-hong, Chief physician, Department of Orthopedics, People’s Hospital of Deyang City, Deyang 618000, Sichuan Province, China; Liu Mo-zhen, MD, Chief physician, Professor, Master’s supervisor, Department of Orthopedics, the First Affiliated Hospital of Dalian Medical University, Dalian 116011, Liaoning Province, China
  • About author:Wang Zhi-cong, Master, Physician, Department of Orthopedics, People’s Hospital of Deyang City, Deyang 618000, Sichuan Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81273508, 81350017; the Major Scientific Research Project of Sichuan Provincial Health and Family Planning Committee in 2017, No. 17ZD023

摘要:

文章快速阅读:

文题释义:
转化生长因子β3:
在哺乳动物胚胎发育过程中,能够促进形态发生,并对脊椎形成、肢端发芽、面骨形成及心脏瓣膜的形成起重要作用。转化生长因子β3可调控骨形成,影响成年骨再生。
SOX9基因:是一种重要的早期胚胎发育相关基因,是前软骨细胞浓聚所必需的因子,促进成骨的同时也抑制骨骺细胞的终末分化,以延长软骨发育成熟过程,抑制软骨细胞凋亡,并指导Ⅱ型胶原和蛋白多糖的合成,有利于骨骼在生长发育阶段形成复杂的形状和结构。

 

摘要
背景:
骨髓间充质干细胞在向软骨细胞分化过程中可形成聚合体,但是该形态学特点是否可代表骨髓间充质干细胞已经成软骨分化尚无研究报道。
目的:观察骨髓间充质干细胞成软骨分化过程中聚合体的形成和成软骨分化情况。
方法:体外培养大鼠骨髓间充质干细胞,传代至第6代时备用。对照组用无血清LG-DMEM培养基培养14 d,诱导组用含转化生长因子β3的成软骨完全诱导培养基培养14 d,倒置显微镜观察诱导过程中细胞形态变化;免疫荧光染色、甲苯胺蓝染色、qRT-PCR检测成软骨特异指标Ⅱ型胶原、蛋白多糖和成软骨转录因子SOX9的基因表达及蛋白合成情况。
结果与结论:①与对照组相比,诱导组骨髓间充质干细胞在第3天失去典型的成纤维形态,第7天开始形成成簇的单层聚合体,第14天形成直径更大的多层聚合体;②聚合体的免疫荧光染色及甲苯胺蓝染色均阳性,而聚合体外的单个细胞无特异染色;③qRT-PCR亦证实诱导组有成软骨特异基因Ⅱ型胶原、蛋白多糖和SOX9表达;④上述研究结果提示骨髓间充质干细胞成软骨分化过程中聚合体的形成可作为成软骨分化的一种形态学检测指标。


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
ORCID: 0000-0001-6252-5062(王志聪)

关键词: 骨髓间充质干细胞, 成软骨分化, 软骨细胞, 聚合体, 形态学, Ⅱ型胶原, 蛋白多糖, SOX9转录因子, 干细胞, 国家自然科学基金

Abstract:

BACKGROUND: Bone marrow mesenchymal stem cells (BMSCs) can compact to form aggregates during chondrogenic differentiation, but whether the formation of aggregation is a prerequisite for chondrogenic induction is not yet documented.
OBJECTIVE: To observe the morphological characteristics of BMSCs differentiating into chondrocytes.
METHODS: BMSCs were cultured in vitro and passage 6 cells were used for the following experiments. Cells were induced in serum-free LG-DMEM medium as control group or in complete chondrogenic induction medium containing transforming growth factor β3 as induction group for 14 days. Cellular morphology during differentiation process was observed by inverted microscope. Chondrocyte-specific markers, including type II collagen, aggrecan and chondrogenic transcription factor SOX9, were evaluated by immunofluorescence, toluidine blue staining and quantitative RT-PCR.
RESULTS AND CONCLUSION: Compared with the control group, the cells began to lose the typical morphology at day 3 of chondrogenic induction, and then compacted to form mono-layered aggregates and multi-layered aggregates at days 7 and 14, respectively. The aggregates were positive for immunofluorescence and toluidine blue staining, while no staining was detected in the single cells. qRT-PCR results also confirmed the mRNA expression of type II collagen, aggrecan and SOX9 in the cells after chondrogenic induction. Therefore, these abovementioned results suggest that the formation of aggregation in BMSCs can be one of morphological markers of chondrogenic differentiation. 


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

Key words: Bone Marrow, Mesenchymal Stem Cells, Cell Differentiation, Chondrocytes, Collagen Type II, SOX9 Transcription Factor, Tissue Engineering

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