摘要
背景:骨植入材料表面微纳结构仿生设计可模拟人体天然骨组织中细胞外环境的结构,从而获得较为理想的骨整合功能,但骨植入材料表面微纳结构调控细胞功能及促进成骨的机制还有待进一研究。目的:分析钛片材料微结构表面对MC3T3-E1成骨细胞成骨分化的影响。方法:(1)在5 V或20 V恒定电压下,采用酸蚀和阳极氧化技术在钛片表面制备不同管径的纳米管阵列,分别记为R5组、R20组。检测纯钛片(未经酸蚀和阳极氧化处理)、R5组、R20组的表面形貌、粗糙度与亲水性。(2)将对数生长期的MC3T3-E1成骨细胞分别接种于纯钛片、R5组、R20组钛片表面,成骨诱导培养24 h后,采用RT-PCR检测与免疫荧光染色分析细胞机械敏感通道蛋白1的表达;加入含或不含机械敏感通道蛋白1激活剂Yada1的成骨诱导基,培养7 d后进行碱性磷酸酶染色,培养14 d后进行茜素红染色。结果与结论:(1)扫描电镜下可见纯钛片表面光滑,R5组、R20组钛片表面可见分布相对均匀且有序的纳米管阵列,平均直径分别约30 nm和100 nm,原子力显微镜进一步验证了扫描电镜观察结果。R5组钛片表面粗糙度大于纯钛片(P <0.05),水接触角小于纯钛片(P <0.05);R20组钛片表面粗糙度大于R5组(P<0.05),水接触角小于R5组(P<0.05)。(2)RT-PCR检测与免疫荧光染色显示,R5组细胞机械敏感通道蛋白1的表达高于纯钛片组(P <0.05),R20组细胞机械敏感通道蛋白1的表达高于R5组(P <0.05)。在成骨诱导条件下,与未加入Yada1情况相比,纯钛片组加入Yada1后的细胞碱性磷酸酶活性、钙化结节沉积均无明显变化,R5组、R20组加入Yada1后的细胞碱性磷酸酶活性、钙化结节沉积均显著增加(P <0.05);在加入或未加入Yada1情况下,R5组细胞碱性磷酸酶活性与钙化结节沉积均多于纯钛片组(P <0.05),R20组细胞碱性磷酸酶活性与钙化结节沉积均多于R5组(P <0.05)。(3)结果表明,钛片表面微�
BACKGROUND:The micro/nanostructured gradient biomimetic surface of implant materials can simulate the structure of the extracellular environment in human bone tissue,thereby achieving perfect bone integration function.However,further research is needed on the mechanisms by which the surface microstructure of bone implant materials regulates cell function and promotes osteogenesis.OBJECTIVE:To analyze the effect of titanium sheet microstructure surface on osteogenic differentiation of MC3T3-E1 osteoblasts.METHODS:(1)At a constant voltage of 5 V or 20 V,nanotube arrays of different diameters were prepared on the surface of titanium sheets by acid etching and anodic oxidation techniques,and were recorded as group R5 and group R20,respectively.The surface morphology,roughness,and hydrophilicity of pure titanium sheet(without acid etching or anodizing treatment)were measured in group R5 and group R20.(2)MC3T3-E1 osteoblasts of logarithmic growth stage were inoculated on the surface of pure titanium sheets,R5 group and R20 group respectively.After 24 hours of osteogenic induction culture,the expression of mechanical sensitive channel protein 1 was analyzed by RT-PCR and immunofluorescence staining.Osteoblast inducible base with or without the mechanosensitive channel protein 1 activator Yada1 was added,and alkaline phosphatase staining was performed after 7 days of culture.Alizarin red staining was performed after 14 days of culture.RESULTS AND CONCLUSION:(1)The surface of pure titanium sheets was smooth under scanning electron microscope.Relatively uniform and orderly nanotube arrays with average diameters of about 30 nm and 100 nm were observed on the surface of titanium sheets of groups R5 and R20,respectively.The results of scanning electron microscope were further verified by atomic force microscopy.The surface roughness of titanium sheet of group R5 was higher than that of pure titanium(P<0.05),and the water contact angle was lower than that of pure titanium(P<0.05).The surface roughness of titanium sheet in grou
作者
黄丽苹
李卉
王新革
王瑞
常蓓
李适廷
兰小蓉
李广文
Huang Liping;Li Hui;Wang Xinge;Wang Rui;Chang Bei;Li Shiting;Lan Xiaorong;Li Guangwen(Department of Implantology,The Affiliated Stomatological Hospital,Southwest Medical University,Luzhou Key Laboratory of Oral Maxillofacial Reconstruction and Regeneration,Luzhou 646000,Sichuan Province,China;Department of Epidemiology and Statistics,School of Public Health,Southwest Medical University,Luzhou 646000,Sichuan Province,China;State Key Laboratory of Military Stomatology&National Clinical Research Center for Oral Diseases&Shaanxi Key Laboratory of Oral Diseases,Department of Prosthodontics,School of Stomatology,The Fourth Military Medical University,Xi’an 710032,Shaanxi Province,China;Medical Care Center for Military Personnel,Tangdu Hospital,Air Force Military Medical University,Xi’an 710032,Shaanxi Province,China;Department of Stomatology,The PLA Rocket Force Characteristic Medical Center,Beijing 100088,China)
出处
《中国组织工程研究》
CAS
北大核心
2025年第10期1990-1996,共7页
Chinese Journal of Tissue Engineering Research
基金
四川省科技厅重点研发项目(22YFS0634),项目负责人:兰小蓉
泸州市科技局重点研发计划(面上)(2022-SYF-33),项目负责人:李广文
西南医科大学自科重点项目(2022ZD015),项目负责人:李广文
西南医科大学附属口腔医院院级重点项目(2022Z01),项目负责人:李广文。
关键词
骨植入材料
钛种植体
材料微结构
机械敏感通道蛋白
成骨分化
PIEZO1
bone implant material
titanium implant
material microstructure
mechanosensitive channel protein
osteogenic differentiation
PIEZO1
