中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (1): 24-29.doi: 10.3969/j.issn.2095-4344.1521

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

关节软骨细胞和骨髓间充质干细胞不同共培养方式对细胞增殖与分化的影响

赵文慧1,皮洪涛1,冯万文1,李向东1,王建伟1,刘岳鹏1,姜 洋2,马建新1,夏亚一3,王翠芳3,邵林林1,李春辉1,郁洪阳1,刘尚林1,董言斌1,马亚辉2   

  1. 1徐州医科大学附属连云港市东方医院临床研究中心,江苏省连云港市 222042;2蚌埠医学院研究生院,安徽省蚌埠市 233000;3兰州大学第二医院骨科研究所,甘肃省兰州市 730030
  • 出版日期:2019-01-08 发布日期:2018-11-28
  • 通讯作者: 冯万文,主任医师,研究生导师,徐州医科大学附属连云港市东方医院临床研究中心,江苏省连云港市 222042
  • 作者简介:赵文慧,女,1988年生,山西省大同市人,汉族,2014年中国医科大学毕业,硕士,助理研究员,主要从事细胞生物学和分子生物学的研究。 并列第一作者:皮洪涛,男,1971年生,江苏省连云港市人,汉族,主治医师,主要从事细胞病理学和分子病理学的研究。
  • 基金资助:

    江苏省“333重点人才培养工程”项目(201412),项目负责人:冯万文;连云港市科技局社会发展项目(SH1545),项目负责人:冯万文;连云港市卫计委科研计划项目(201728),项目负责人:冯万文

Contact or noncontact cocultures of articular chondrocytes with bone marrow mesenchymal stem cells: cell proliferation and differentiation

Zhao Wenhui1, Pi Hongtao1, Feng Wanwen1, Li Xiangdong1, Wang Jianwei1, Liu Yuepeng1, Jiang Yang2, Ma Jianxin1, Xia Yayi3, Wang Cuifang3, Shao Linlin1, Li Chunhui1, Yu Hongyang1, Liu Shanglin1, Dong Yanbin1, Ma Yahui2   

  1. 1Center for Clinical Research and Translational Medicine, Lianyungang Oriental Hospital Affiliated to Xuzhou Medical University, Lianyungang 222042, Jiangsu Province, China; 2Bengbu Medical College Postgraduate School, Bengbu 233000, Anhui Province, China; 3Orthopaedic Institute of Lanzhou University Second Hospital, Lanzhou 730030, Gansu Province, China
  • Online:2019-01-08 Published:2018-11-28
  • Contact: Feng Wanwen, Chief physician, Master’s supervisor, Center for Clinical Re-search and Translational Medicine, Lianyungang Oriental Hospital Affiliated to Xuzhou Medical Uni-versity, Lianyungang 222042, Jiangsu Province, China
  • About author:Zhao Wenhui, Master, Assistant researcher, Center for Clinical Research and Translational Medicine, Lianyungang Oriental Hospital Affiliated to Xuzhou Medical University, Lianyungang 222042, Jiangsu Province, China. Pi Hongtao, Attending physician, Center for Clinical Research and Translational Medicine, Lianyun-gang Oriental Hospital Affiliated to Xuzhou Medical University, Lianyungang 222042, Jiangsu Prov-ince, China. Zhao Wenhui and Pi Hongtao contributed equally to this work.
  • Supported by:

    Jiangsu Provincial Key Talent Training Project, No. 201412 (to FWW); Social Development Project of Lianyungang Science and Technology Bureau, No. SH1545 (to FWW); Scientific Research Program of Lianyungang Health and Family Planning Commission, No. 201728 (to FWW)

摘要:

文章快速阅读:

文题释义:
缝隙连接和连接蛋白:
缝隙连接是存在于2个细胞间的特殊连接结构,由相邻细胞膜上的2个连接子相互锚定组成,而连接子由连接蛋白组成。通过缝隙连接通道进行细胞间直接通讯联系,又称缝隙连接细胞间通讯。缝隙连接分布广泛,几乎存在于所有的动物细胞中。连接蛋白是由10余个成员组成的保守大家族,各亚成员之间有50%-60%同源,主要差别在于连接蛋白分子的胞浆部分。连接蛋白组成的缝隙蛋白通道允许离子、代谢物和一些第二信使及寡聚核苷酸通过,通过物质交换构成缝隙连接细胞间通讯,对细胞的分化、生长、发育和凋亡具有调节作用。
非接触共培养:是将Tanswell小室放入培养板进行细胞培养,该小室有一层带有微孔的聚碳酸酯膜,孔径≤0.4 μm,允许生物分子自由通过,而细胞不能通过隔膜,避免了细胞间直接接触,有利于观察细胞的生长状态,探究细胞间相互作用的机制。

 

摘要
背景:
在关节软骨细胞和骨髓间充质干细胞共培养环境中,软骨细胞功能活跃,增殖速度加快,骨髓间充质干细胞促进了软骨细胞的表型维持,而且少量软骨细胞提供的微环境能够诱导骨髓间充质干细胞成软骨分化,降低了软骨分化过程中出现的肥大表型和软骨内骨化,但是影响共培养系统中细胞增殖分化的因素和细胞间相互作用的机制尚不明确。
目的:观察软骨细胞和骨髓间充质干细胞接触共培养对细胞增殖分化的影响,进一步优化共培养方式,为探讨共培养系统中二者的相互作用机制提供依据。
方法:分离和培养新西兰兔(南京医科大学实验动物中心提供)软骨细胞和骨髓间充质干细胞,取第2代软骨细胞和骨髓间充质干细胞,以1∶3的比例直接混合在24孔板进行接触共培养为接触共培养组,以1∶3比例分别在Transwell的上室和下室进行非接触共培养为非接触共培养组,共培养21 d。细胞爬片进行甲苯胺蓝染色、COL2a1及Cx43细胞免疫化学染色。应用CCK8检测共培养系统中细胞的增殖情况,ELISA检测共培养细胞上清液中糖胺聚糖和转化生长因子β3水平,Western blot检测共培养细胞COL2a1和Cx43的表达。然后添加转化生长因子β3进行软骨细胞和骨髓间充质干细胞接触共培养和非接触共培养,比较细胞增殖、糖胺聚糖水平、COL2a1及Cx43蛋白表达的变化。
结果与结论:①随着共培养时间的延长,细胞增殖能力逐渐增高,接触共培养组细胞吸光度值明显高于非接触共培养组(P < 0.05),糖胺聚糖和转化生长因子β3水平以及COL2a1和Cx43的蛋白表达明显高于非接触共培养组;②添加10 µg/L转化生长因子β3共培养21 d,接触共培养组细胞增殖、糖胺聚糖水平、COL2a1及Cx43的表达与未添加转化生长因子β3比较无明显变化(P > 0.05),而非接触共培养组的细胞增殖、糖胺聚糖水平、COL2a1及Cx43蛋白表达明显提高(P < 0.05),但仍明显低于未添加转化生长因子β3的接触共培养组(P < 0.05);③结果表明,接触共培养比非接触共培养明显促进细胞的增殖和分化,Cx43在其中起重要作用。

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: 0000-0002-4472-5981(冯万文)

关键词: 关节软骨细胞, 骨髓间充质干细胞, 共培养, 增殖, 分化, 糖胺聚糖, Ⅱ型胶原, 转化生长因子β3, 缝隙连接, 连接蛋白, 干细胞

Abstract:

BACKGROUND: Coculture of articular chondrocytes with bone marrow mesenchymal stem cells (BMSCs) can contribute to proliferation and phenotype maintenance of articular chondrocytes and chondrogenic differentiation of BMSCs as a result of the microenvironment provided by the small number of articular chondrocytes. Furthermore, the coculture system decreases hypertrophic phenotype and enchondral ossification during BMSCs chondrogenic differentiation. However, the mechanisms underlying the cell-cell interactions in the coculture system of articular chondrocytes with BMSCs have not been fully clarified and necessitate further studies.
OBJECTIVE: To investigate the effect of the contact coculture of articular chondrocytes with BMSCs on the cell proliferation and differentiation in vitro, and to further optimize the coculture pattern providing a basis for further exploring the interaction mechanism of articular chondrocytes and BMSCs in the coculture system. 
METHODS: Articular chondrocytes and BMSCs were isolated from New Zealand white rabbits (provided by the Animal Core Facility of Nanjing Medical University, Nanjing, China) and expanded in vitro. The articular chondrocytes and BMSCs both at passage 2 were harvested and cocultured at the ratio of 1:3 for 21 days. The coculture patterns included the cell-cell contact coculture in the 24-well plates as experimental group and cell-cell noncontact coculture through a Transwell chamber as control group. Cytochemistry staining and immunocytochemistry staining were performed to observe cell morphology and to evaluate distribution of related proteins. Cell proliferation was determined using Cell Counting Kit-8. Levels of glycosaminoglycans and transforming growth factor-β3 (TGF-β3) in the medium supernatants of the experimental and control groups were detected by ELISA. Expression of type II collagen alpha 1 (COL2a1) and connexin 43 (Cx43) in the coculture system of articular chondrocytes with BMSCs were analyzed using western blot. Cell proliferation, glycosaminoglycan level and expression levels of COL2a1 and Cx43 in the two groups were evaluated following TGF-β3 supplementation in each group and articular chondrocytes were subsequently cocultured with BMSCs in the contact or noncontact manner. 
RESULTS AND CONCLUSION: (1) The ability of cell proliferation gradually increased with prolonged coculture time, the mean absorbance value of the experimental group was significantly higher that that of the control group (P < 0.05). The mean levels of glycosaminoglycan and TGF-β3 and expression levels of COL2a1 and Cx43 in the experimental group were significantly higher than those in the control group respectively. (2) Following addition of 10 µg/L TGF-β3, the aforementioned indicators showed no significant changes in the experimental group (P > 0.05), whereas increased significantly in the control group, but still lower than those in the experimental group with no TGF-β3 supplementation (P < 0.05). Our results indicate that the contact coculture of articular chondrocytes with BMSCs significantly promotes cell proliferation and differentiation as compared with the noncontact coculture, and Cx43 plays an important role in cell proliferation and 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: Chondrocytes, Bone Marrow, Mesenchymal Stem Cells, Coculture Techniques, Transforming Growth Factor beta3, Connexin 43, Tissue Engineering

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