中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (19): 2953-2957.doi: 10.3969/j.issn.2095-4344.2200

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

血小板衍生生长因子BB诱导大鼠骨髓间充质干细胞向成骨细胞分化

魏  琴1,张  雪2,马  磊3,李志强1,寿  玺1,段明军1,吴  硕4,贾麒钰4,马  创4   

  1. 1新疆医科大学动物实验中心,新疆医学动物模型研究重点实验室,新疆维吾尔自治区乌鲁木齐市   830011;新疆医科大学第一附属医院,2临床医学研究院,4骨科中心显微修复外科,新疆维吾尔自治区乌鲁木齐市   830054;3新疆医科大学第二附属医院骨科,新疆维吾尔自治区乌鲁木齐市   830000
  • 收稿日期:2020-03-20 修回日期:2020-03-25 接受日期:2020-05-09 出版日期:2021-07-09 发布日期:2021-01-13
  • 通讯作者: 马创,博士,主任医师,硕士生导师,新疆医科大学第一附属医院骨科中心显微修复外科,新疆维吾尔自治区乌鲁木齐市 830054
  • 作者简介:魏琴,女,1980年生,新疆维吾尔自治区乌鲁木齐市人,汉族,2014年新疆医科大学毕业,硕士,实验师,主要从事细胞培养及组织工程研究。
  • 基金资助:
    新疆维吾尔自治区高校科研计划(XJEDU2020Y022),项目负责人:魏琴;国家自然科学基金(81760397),项目负责人:马创

Platelet-derived growth factor-BB induces the differentiation of rat bone marrow mesenchymal stem cells into osteoblasts

Wei Qin1, Zhang Xue2, Ma Lei3, Li Zhiqiang1, Shou Xi1, Duan Mingjun1, Wu Shuo4, Jia Qiyu4, Ma Chuang4   

  1. 1Laboratory Animal Center of Xinjiang Medical University, Xinjiang Key Laboratory of Medical Animal Model Research, Xinjiang Uygur Autonomous Region, China; 2Clinical Medical Research Institute of First Affiliated Hospital, Xinjiang Medical University, Xinjiang Uygur Autonomous Region, China; 3Department of Orthopedics, Second Affiliated Hospital of Xinjiang Medical University, Xinjiang Uygur Autonomous Region, China; 4Department of Microrestorative Surgery 
  • Received:2020-03-20 Revised:2020-03-25 Accepted:2020-05-09 Online:2021-07-09 Published:2021-01-13
  • Contact: Ma Chuang, MD, Chief physician, Master’s supervisor, Department of Microrestorative Surgery, Department of Orthopedics Center, First Affiliated Hospital of Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China
  • About author:Wei Qin, Master, Experimentalist, Laboratory Animal Center of Xinjiang Medical University, Xinjiang Key Laboratory of Medical Animal Model Research, Urumqi 830011, Xinjiang Uygur Autonomous Region, China
  • Supported by:
    the Scientific Research Plan of Universities in Xinjiang Uygur Autonomous Region, No. XJEDU2020Y022 (to WQ); the National Natural Science Foundation of China, No. 81760397 (to MC)

摘要:

文题释义:
骨髓间充质干细胞:是目前组织工程骨研究领域内最成熟也是运用最多的种子细胞,已经证实具有多向分化潜能,可以向成骨细胞、破骨细胞、成软骨细胞、成脂细胞、成血管细胞等分化,并具有自身免疫原性弱、操作方便的特点。
血小板衍生生长因子BB:血小板衍生生长因子最初从血小板中分离出来,是间充质干细胞迁移和增殖的关键生长因子,主要由血小板、内皮细胞、巨噬细胞产生,大量试验证实血小板衍生生长因子BB在骨折愈合早期就出现,作用贯穿全程,各阶段均能够有效诱导软骨细胞及成骨细胞增殖,同时可提高破骨细胞活性、加速骨吸收,促进骨重塑。

背景:研究表明,小鼠前破骨细胞分泌的血小板衍生生长因子BB可以促进成骨细胞和成血管细胞形成,尚无血小板衍生生长因子BB是否可以促进骨髓间充质干细胞向成骨细胞分化的相关研究。
目的:探讨血小板衍生生长因子BB诱导大鼠骨髓间充质干细胞向成骨细胞分化的可行性。
方法:①体外分离培养SD大鼠骨髓间充质干细胞,第3代细胞经流式鉴定其表面标记物CD45、CD29和CD34的表达,选用纯度较高的骨髓间充质干细胞进行血小板衍生生长因子BB干预实验;②第3代骨髓间充质干细胞经25 μg/L血小板衍生生长因子BB诱导3 d,进行Ⅰ型胶原免疫荧光染色,然后采用碱性磷酸酶改良钙钴法和偶氮偶联法、茜素红法对细胞进行染色,鉴定成骨细胞的表面特征,最后采用RT-PCR检测Runx-2和Gli-2的mRNA水平。
结果与结论:①经细胞免疫荧光染色,诱导后细胞的Ⅰ型胶原绿色荧光表达率>90%;②经碱性磷酸酶改良钙钴法染色,可见细胞胞质中有黑色条索状附着,说明这些细胞均表达有活性的碱性磷酸酶;经碱性磷酸酶偶氮偶联法染色,可见细胞胞浆中含有蓝色的有活性的碱性磷酸酶;经茜素红染色,可见细胞聚集在一起形成小的红色的钙结节;③经RT-PCR检测,血小板衍生生长因子BB诱导后Gli-2和Runx-2的mRNA表达均高于未诱导骨髓间充质干细胞(P < 0.05);④结果表明,大鼠骨髓间充质干细胞经血小板衍生生长因子BB诱导后可以分化为具有功能的成骨细胞。
https://orcid.org/0000-0003-0344-8305(魏琴)

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: 干细胞, 骨髓间充质干细胞, 血小板衍生生长因子BB, 成骨细胞, 钙结节, 碱性磷酸酶

Abstract: BACKGROUND: It has been shown that platelet-derived growth factor-BB secreted by mouse osteoclasts can promote the formation of osteoblasts and vascular cells. Whether platelet-derived growth factor-BB can promote the differentiation of bone marrow mesenchymal stem cells into osteoblasts has not been studied.
OBJECTIVE: To investigate the feasibility of platelet-derived growth factor-BB on inducing bone marrow mesenchymal stem cells of rats into osteoblasts. 
METHODS:  (1) The bone marrow mesenchymal stem cells of Sprague-Dawley rats were isolated and cultured in vitro. The surface markers CD45, CD29 and CD34 of the third generation were identified by flow cytometry. Bone marrow mesenchymal stem cells with high purity were selected for platelet-derived growth factor-BB intervention experiments. (2) Bone marrow mesenchymal stem cells at passage 3 were induced by 25 μg/L platelet-derived growth factor-BB for 3 days. Cellular immunofluorescence was used to identify type I collagen, followed by alkaline phosphatase modified calcium-cobalt method and azo coupling method kit, alizarin red method. The surface characteristics of osteoblasts were identified. Finally, RT-PCR was used to detect the mRNA levels of Runx-2 and Gli-2 genes.  
RESULTS AND CONCLUSION: (1) Cellular immunofluorescence staining showed that the green fluorescence expression rate of type I collagen was more than 90% after induction. (2) Alkaline phosphatase modified calcium-cobalt method demonstrated that black cords were attached to the cytoplasm of the cells, indicating that these cells expressed active alkaline phosphatase. Alkaline phosphatase azo coupling method showed that blue active alkaline phosphatase was found in the cytoplasm of cells. Alizarin red staining exhibited that induced cells gathered together to form small red calcium nodules. (3) RT-PCR showed that the mRNA levels of Gli-2 and Runx-2 genes were higher than those in bone marrow mesenchymal stem cells after platelet-derived growth factor-BB induction (P < 0.05). (4) It is concluded that rat bone marrow mesenchymal stem cells can be differentiated into functional osteoblasts after being induced by platelet-derived growth factor-BB.

Key words: stem cells, bone marrow mesenchymal stem cells, platelet-derived growth factor BB, osteoblasts, calcium nodules, alkaline phosphatase

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