中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (16): 2535-2540.doi: 10.3969/j.issn.2095-4344.3117

• 材料生物相容性 material biocompatibility • 上一篇    下一篇

RGD多肽修饰多孔钽可激活MG63细胞整合素/黏着斑激酶信号通路

张  辉1,王少华2,王  茜3,王  辉4,甘洪全5,崔逸爽3,李琪佳3,王志强5   

  1. 唐山市第二医院,1关节一科,4手一科,河北省唐山市   063000;2天津市急救中心,天津市  300000;3华北理工大学医学实验研究中心,河北省唐山市   063210;5华北理工大学附属医院骨科,河北省唐山市   063000
  • 收稿日期:2020-07-30 修回日期:2020-07-31 接受日期:2020-08-25 出版日期:2021-06-08 发布日期:2021-01-07
  • 通讯作者: 王志强,教授,博士生导师,华北理工大学附属医院骨科,河北省唐山市 063000 王茜,副教授,硕士生导师,华北理工大学医学实验研究中心,河北省唐山市 063210
  • 作者简介:张辉,男,1981年生,河北省唐山市人,汉族,博士,副主任医师,主要从事关节外科及骨组织工程研究。
  • 基金资助:
    国家科技部科技支撑课题资助项目(2012BAE06B03),项目负责人:王志强;河北省科技支撑资助项目(16277776D),项目负责人:李琪佳;河北省医学科学研究重点课题计划资助项目(20160225),项目负责人:王志强;华北理工大学博士科研启动基金资助项目(28606299),项目负责人:王茜;河北省卫计委资助课题(20180733),项目负责人:王茜

Porous tantalum coated with RGD polypeptide can activate the integrin/focal adhesion kinase signaling pathway of MG63 cells

Zhang Hui1, Wang Shaohua2, Wang Qian3, Wang Hui4, Gan Hongquan5, Cui Yishuang3, Li Qijia3, Wang Zhiqiang5    

  1. 1First Department of Joint Surgery, Second Hospital of Tangshan, Hebei Province, China; 2Tianjin Emergency Center, China; 3Medical Research Center, North China University of Science and Technology, Hebei Province, China; 4First Department of Hand Surgery, Second Hospital of Tangshan, Hebei Province, China; 5Department of Orthopedics, Affiliated Hospital of North China of Science and Technology, Hebei Province, China
  • Received:2020-07-30 Revised:2020-07-31 Accepted:2020-08-25 Online:2021-06-08 Published:2021-01-07
  • Contact: Wang Zhiqiang, Professor, Doctoral supervisor, Department of Orthopedics, Affiliated Hospital of North China of Science and Technology, Tangshan 063000, Hebei Province, China Wang Qian, Associate professor, Master’s supervisor, Medical Research Center, North China University of Science and Technology, Tangshan 063210, Hebei Province, China
  • About author:Zhang Hui, MD, Associate chief physician, First Department of Joint Surgery, Second Hospital of Tangshan, Tangshan 063000, Hebei Province, China
  • Supported by:
    the Project supported by the Ministry of Science and Technology of China, No. 2012BAE06B03 (to WZQ); Hebei Province Science and Technology Support Project, No. 16277776D (to LQJ); Hebei Provincial Medical Research Project, No. 20160225 (to WZQ); the Project Supported by the Foundation of Doctoral Research of North China University of Science and Technology, No. 28606299 (to WQ); the Project Supported by Hebei Provincial Health and Family Planning Commission, No. 20180733 (to WQ)

摘要:

文题释义:
RGD多肽:是由甘氨酸、精氨酸及天冬氨酸组成的短肽序列,是目前应用最广泛最有效的促黏附多肽,对细胞生长、代谢起重要调节作用。在生物材料表面复合RGD多肽可以诱导成骨细胞整合素基因的表达,促进成骨细胞黏附在生物材料的表面并分化成熟,促进新骨形成。
整合素/黏着斑激酶信号通路:整合素可介导细胞与细胞外基质黏附,是一种重要的细胞表面受体,可通过细胞中黏着斑激酶等非受体酪氨酸激酶传递外信号到细胞内,并进一步激活细胞内信号通路(如Ras/MAPK、PI3K/Akt等),介导细胞迁移、分化和基因表达。

背景:在材料表面复合RGD多肽可诱导成骨细胞整合素基因的表达,促进成骨细胞黏附在生物材料的表面并分化成熟,促进新骨形成。
目的:分析RGD多肽修饰国产多孔钽后对MG63细胞整合素/黏着斑激酶信号通路的影响。
方法:制备RGD多肽修饰的多孔钽材料。将MG63细胞分别接种于多孔钽、RGD多肽修饰的多孔钽材料表面,以单纯培养的MG63细胞为空白组,培养1,3,5,7 d时,采用CCK-8法检测细胞增殖;培养1,3,5 d时,倒置显微镜下观察细胞生长状态;培养3,5 d时,扫描电镜观察细胞黏附;培养5 d时,采用Western-blot与RT-PCR法检测Ⅰ型胶原、整合素β1与黏着斑激酶表达。
结果与结论:①RGD修饰组培养3,5,7 d的细胞增殖快于多孔钽组、空白组(P < 0.05),多孔钽组各时间点细胞增殖与空白组比较差异无显著性意义(P > 0.05);②倒置显微镜显示,培养1 d时,多孔钽组、RGD修饰组细胞贴附在材料边缘,细胞数量随着培养时间的延长逐渐增加,其中RGD修饰组细胞数量及密集程度优于多孔钽组;③扫描电镜显示,培养3 d时,多孔钽组、RGD修饰组材料表面均可见细胞黏附生长,细胞在材料孔壁及孔隙内黏附生长,伸出伪足嵌入孔洞内;5 d时,细胞分泌大量细胞外基质,细胞通过基质相互连接并逐渐覆盖材料表面,其中RGD修饰组细胞生长状态、基质分泌及细胞覆盖面积优于多孔钽组;④Western-blot检测显示,RGD修饰组Ⅰ型胶原、整合素β1蛋白表达高于多孔钽组、空白组(P < 0.05),多孔钽组Ⅰ型胶原、整合素β1、黏着斑激酶蛋白表达高于空白组(P < 0.05);⑤RT-PCR检测显示,RGD修饰组Ⅰ型胶原、整合素β1与黏着斑激酶 mRNA表达高于多孔钽组、空白组(P < 0.05),并且多孔钽组高于空白组(P < 0.05);⑥结果表明,RGD多肽修饰多孔钽后可上调细胞膜上Ⅰ型胶原、整合素β1表达激活整合素/黏着斑激酶信号通路,促进细胞黏附、生长。

https://orcid.org/0000-0001-8647-4300 (张辉) 
中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程



关键词: 骨, 材料, 蛋白质, 信号通路, RGD多肽, 多孔钽, MG63细胞, Ⅰ型胶原, 整合素, 黏着斑激酶

Abstract: BACKGROUND: The compounding of RGD polypeptide on the surface of the material can induce the expression of osteoblast integrin gene, promote the adhesion of osteoblasts to the surface of biomaterials and differentiate into mature cells, and promote the formation of new bone.
OBJECTIVE: To analyze the effect of domestic porous tantalum modified by RGD polypeptide on integrin/focal adhesion kinase signaling pathway in MG63 cells.
METHODS: Porous tantalum material modified by RGD polypeptide was prepared. MG63 cells were inoculated on the surface of porous tantalum and porous tantalum materials modified with RGD polypeptide. MG63 cells cultured alone were used as the blank group. When cultured for 1, 3, 5, and 7 days, the cell proliferation was detected by the CCK-8 method. At 1, 3, and 5 days, the cell growth status was observed under an inverted microscope. At 3, 5 days of culture, cell adhesion was observed with scanning electron microscope. At 5 days of culture, RT-PCR and western blot assay were used to detect type I collagen and integrin β1 and focal adhesion kinase expression.
RESULTS AND CONCLUSION: (1) The cell proliferation of the RGD modified group cultured at 3, 5, and 7 days was faster than that of the porous tantalum group and the blank group (P < 0.05). There was no significant difference in cell proliferation between the porous tantalum group and the blank group at each time point (P > 0.05). (2) Observation by an inverted phase contrast microscope showed that the cells of the porous tantalum group and the RGD modified group were attached to the edge of the material when cultured for 1 day, and the number of cells gradually increased with the extension of the culture time. The number and density of cells in the RGD modified group were better than that of the porous tantalum group. (3) Observation by scanning electron microscope showed that cells adhered to the surface of the porous tantalum group and RGD modified group after 3 days of culture. The cells adhered to the material pore walls and pores, and protruded pseudopods into the pores. When cultured for 5 days, the cells secreted a large amount of extracellular matrix, and the cells were connected to each other through the matrix and gradually covered the surface of the material. The cell growth state, matrix secretion and cell coverage area of the RGD modified group were better than those of the porous tantalum group. (4) Western blot detection results showed that the expressions of type I collagen and integrin β1 protein in the RGD modified group were higher than those in the porous tantalum group and the blank group (P < 0.05). The expression levels of type I collagen, integrin β1, and focal adhesion kinase protein in the porous tantalum group were higher than those in the blank group (P < 0.05). (5) RT-PCR detection showed that the expressions of type I collagen, integrin β1, and focal adhesion kinase mRNA in the RGD modified group were higher than those of the porous tantalum group and the blank group (P < 0.05), and the expression of the porous tantalum group was higher than that of the blank group (P < 0.05). (6) The results showed that porous tantalum modified with RGD polypeptide can up-regulate the expression of type I collagen and integrin β1 on the cell membrane, activate the integrin/focal adhesion kinase signaling pathway, and promote cell adhesion and growth.


Key words: bone, material, protein, signal pathway, RGD polypeptide, porous tantalum, MG63 cell, type I collagen, integrin, focal adhesion kinase

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