中国组织工程研究 ›› 2023, Vol. 27 ›› Issue (30): 4783-4789.doi: 10.12307/2023.555

• 组织工程口腔材料 tissue-engineered oral materials • 上一篇    下一篇

纯钛表面硅烷偶联剂复合氧化石墨烯涂层对施万细胞生物学行为的影响

徐星星,文超举,李  英,孟茂花,王勤英,陈镜桥,董  强   

  1. 贵州医科大学口腔医学院/贵州医科大学附属口腔医院,贵州省贵阳市  550004
  • 收稿日期:2022-08-11 接受日期:2022-10-14 出版日期:2023-10-28 发布日期:2023-04-01
  • 通讯作者: 董强,博士,主任医师,博士生导师,贵州医科大学口腔医学院修复学教研室,贵州医科大学附属口腔医院修复种植科,贵州省贵阳市 550004
  • 作者简介:徐星星,女,1998年生,河南省许昌市人,在读硕士,主要从事口腔种植骨组织工程研究。
  • 基金资助:
    国家自然科学基金(81860192),项目负责人:董强;贵州医科大学附属口腔医院口腔医学院科研基金(GYKQKY-2020-05号),项目负责人:文超举

Effect of silane coupling agent composite graphene oxide coating on biological behavior of Schwann cells on pure titanium

Xu Xingxing, Wen Chaoju, Li Ying, Meng Maohua, Wang Qinying, Chen Jingqiao, Dong Qiang   

  1. School of Stomatology, Guizhou Medical University/Affiliated Stomatological Hospital of Guizhou Medical University, Guiyang 550004, Guizhou Province, China
  • Received:2022-08-11 Accepted:2022-10-14 Online:2023-10-28 Published:2023-04-01
  • Contact: Dong Qiang, MD, Chief physician, Doctoral supervisor, School of Stomatology, Guizhou Medical University/Affiliated Stomatological Hospital of Guizhou Medical University, Guiyang 550004, Guizhou Province, China
  • About author:Xu Xingxing, Master candidate, School of Stomatology, Guizhou Medical University/Affiliated Stomatological Hospital of Guizhou Medical University, Guiyang 550004, Guizhou Province, China
  • Supported by:
    National Natural Science Foundation of China, No. 81860192 (to DQ); the Scientific Research Fund of Stomatological College of Affiliated Stomatological Hospital of Guizhou Medical University, No. GYKQKY-2020-05 (to WCJ)

摘要:


文题释义:

硅烷偶联剂:硅烷偶联剂已逐渐被应用于钛金属的表面处理中。钛表面可以通过硅烷偶联剂预处理引入氨基等活性基团,从而为实现钛及钛合金表面的生物大分子的连接提供可能。研究表明这种共价连接的方式可能更加稳定。
氧化石墨烯:是一种高度氧化的石墨烯衍生物,其二维结构由单层和多个官能团组成,由于在同一平面上存在环氧基、羟基和羧酸官能团,具有良好的理化性质。研究表明氧化石墨烯具有成骨、抗菌及载药作用,并对种植体周围炎的治疗与预防也有一定作用。

背景:研究种植体表面处理时更看重是否能提高种植体骨结合的效率,而有关口腔种植体骨感知功能的研究则相对较少。
目的:探讨纯钛表面硅烷偶联剂共价连接氧化石墨烯涂层对体外施万细胞生物学行为的影响。
方法:在TA4钛片表面通过硅烷偶联剂的氨基基团共价连接制备不同质量浓度的氧化石墨烯涂层(0.25,0.5,0.75,1.0 mg/mL,分别命名为0.25-Ti-APTES-GO组、0.5-Ti-APTES-GO组、0.75-Ti-APTES-GO、1.0-Ti-APTES-GO组),通过扫描电镜、拉曼光谱和接触仪对涂层的微观结构、成分及接触角进行表征。分别在光滑钛片、硅烷偶联改性钛片及不同质量浓度氧化石墨烯涂层改性钛片上培养大鼠施万细胞,采用CCK-8法检测各组施万细胞的增殖活性,RT-qPCR和Western blot检测钛片上施万细胞分泌神经生长因子、胶质细胞源性神经营养因子的能力。

结果与结论:①扫描电镜下可见,不同质量浓度的氧化石墨烯涂层呈云雾状,高质量浓度氧化石墨烯涂层呈现的云雾状突起更加致密;②与光滑钛片组相比,硅烷偶联改性组钛片表面接触角较小(P < 0.05);随氧化石墨烯质量浓度的增加,钛片表面接触角逐渐变小,其中0.75-Ti-APTES-GO组、1.0-Ti-APTES-GO组组接触角小于光滑钛片组(P < 0.05);③CCK-8实验显示,与光滑钛片组比较,硅烷偶联剂改性组、0.25-Ti-APTES-GO组、0.5-Ti-APTES-GO组细胞增殖无明显变化(P > 0.05),0.75-Ti-APTES-GO组、1.0-Ti-APTES-GO组细胞增殖受到抑制(P < 0.05),所以后续实验选择0.25-Ti-APTES-GO组、0.5-Ti-APTES-GO组;④RT-qPCR检测显示,0.5-Ti-APTES-GO组神经生长因子mRNA表达量高于其他3组(P < 0.05);0.25-Ti-APTES-GO组胶质细胞源性神经营养因子mRNA表达量低于其他3组(P < 0.05),0.5-Ti-APTES-GO组胶质细胞源性神经营养因子mRNA表达量高于光滑钛片组、硅烷偶联剂改性组(P < 0.05);⑤Western blot检测显示,0.5-Ti-APTES-GO组神经生长因子蛋白表达量高于光滑钛片组、0.25-Ti-APTES-GO组(P < 0.05),胶质细胞源性神经营养因子蛋白表达量高于其他3组(P < 0.05);⑥结果表明,硅烷偶联剂复合0.5 mg/mL氧化石墨烯涂层有良好的生物相容性,能较好地促进纯钛表面施万细胞神经生长因子及胶质细胞源性神经营养因子的表达。 

https://orcid.org/0000-0002-8772-9552 (徐星星);https://orcid.org/0000-0001-8211-7138(董强)

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: 纯钛表面, 氧化石墨烯, 硅烷偶联剂, 施万细胞, 骨感知, 神经营养因子

Abstract: BACKGROUND: The study of implant surface treatment pays more attention to whether it can improve the efficiency of implant osseointegration, while the study of oral implant bone perception function is relatively less. 
OBJECTIVE: To investigate the effect of silane coupling agent covalently bonded graphene oxide coating on the biological behavior of Schwann cells in vitro. 
METHODS: Different mass concentrations of graphene oxide coating (0.25, 0.5, 0.75, and 1.0 mg/mL, named as 0.25-Ti-APTES-GO group, 0.5-Ti-APTES-GO group, 0.75-Ti-APTES-GO, and 1.0-Ti-APTES-GO group) were prepared on the surface of TA4 titanium sheet by covalent bonding of amino groups of silane coupling agent. The microstructure, composition and contact angle of the coating were characterized by scanning electron microscopy, Raman spectroscopy and contact instrument. Rat Schwann cells were cultured on smooth titanium sheet, silane coupling modified titanium sheet and graphene oxide coating modified titanium sheet with different mass concentrations. The proliferation activity of Schwann cells in each group was detected by CCK-8 cell proliferation assay. RT-qPCR and western blot assay were used to detect the ability of Schwann cells to secrete nerve growth factor and glial cell-derived neurotrophic factor on titanium sheets. 
RESULTS AND CONCLUSION: (1) Scanning electron microscopy showed that silane coupling agent composite with different concentrations of graphene oxide coatings were cloudy, and high concentration of graphene oxide coating appeared more dense cloudy protrusions. (2) Compared with the smooth titanium sheet group, the contact angle of the silane coupling agent film titanium group was smaller (P < 0.05). The contact angle of silane coupling agent composite graphene oxide coating became small with the increase of graphene oxide concentration. Among them, the contact angle of 0.75-Ti-APTES-GO group and 1.0-Ti-APTES-GO group was smaller than that of smooth titanium sheet group (P < 0.05). (3) In the CCK-8 cell proliferation assay, compared with the smooth titanium sheet group, there was no significant change in cell proliferation in silane coupling modified titanium sheet group, 0.25-Ti-APTES-GO group and 0.5-Ti-APTES-GO group (P > 0.05). Cell proliferation was inhibited in 0.75-Ti-APTES-GO group and 1.0-Ti-APTES-GO group (P < 0.05), so 0.25-Ti-APTES-GO group and 0.5-Ti-APTES-GO group were selected for subsequent experiments. (4) RT-qPCR exhibited that the expression of nerve growth factor mRNA in 0.5-Ti-APTES-GO group was higher than that in the other three groups (P < 0.05). The expression of glial cell-derived neurotrophic factor mRNA in 0.25-Ti-APTES-GO group was lower than that in other three groups (P < 0.05). The expression of glial cell-derived neurotrophic factor mRNA in 0.5-Ti-APTES-GO group was higher than that in smooth titanium sheet group and silane coupling modified titanium sheet group (P < 0.05). (5) Western blot assay exhibited that the expression level of nerve growth factor protein in the 0.5-Ti-APTES-GO group was higher than that in the smooth titanium sheet group and 0.25-Ti-APTES-GO group (P < 0.05), and the expression level of glial cell-derived neurotrophic factor protein was higher than that in the other three groups (P < 0.05). (6) The results indicated that silane coupling agent combined with 0.5 mg/mL graphene oxide coating had good biocompatibility and could promote the expression of Schwann cell nerve growth factor and glial cell-derived neurotrophic factor on pure titanium surface.

Key words: pure titanium surface, graphene oxide, silane coupling agent, Schwann cell, bone perception, neurotrophic factor

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