目的:研究不同管径Ti-TiO2纳米管对成纤维细胞增殖、伸展和胶原分泌功能的影响.方法:以1、5、10、20 V电压阳极氧化制备不同管径Ti-TiO2纳米管试件,试件表面培养成纤维细胞,MTT法检测细胞增殖,扫描电镜观察形态,天狼星红苦味酸染色检测细胞胶原分泌功能.结果:1、5、10、20 V制备的纳米管径依次为15、30、50和100 nm.细胞在抛光表面的增殖均高于纳米管表面;第5天时,100 nm纳米管表面细胞的增殖显著高于其他(P＜0.01).第3天时,抛光表面细胞呈典型长梭型,纳米管表面细胞伪足明显.100 nm纳米管表面细胞的试件胶原分泌功能最大(P＜0.05).结论:100 nm纳米管对细胞增殖的抑制作用较小并能促进细胞的胶原纤维分泌功能.%Objective:To study the effects of Ti-TiO2 nanotubes with different diameters on the proliferation,stretching and collagen secretion of fibroblasts.Methods:TiO2 nanotubes formed at 1,5,10 and 20 V potentials served as the experimental samples and polished pure titanium served as the control.Fibroblasts was cultivated on the surface of the various samples.MTT assay was used to examine the cell proliferation.The surface morphology of the cells was observed with SEM.Collagen secrection was tested by sirius red/bitter acid staining.Results:The nanotubes prepared by 1,5,10 and 20 V were with the diameter of 15,30,50 and 100 nm respectively.At day 1,3 and 5,the cell proliferation on polished pure titanium surface was more than that on the nanotubes surfaces at the same time;at day 5,cell proliferation on 100 nm nanotubes was significantly more than that on the other nanotube surfaces (P ＜ 0.01).At day 3,fibroblasts at polished pure titanium surface stretched as typical long spindle form,while with obvious pseudopodium at nanotube surfaces.The collagen secretion of fibroblasts was highest at 100 nm nanotubes (P ＜ 0.01).Conclusion:100 nm nanotubes may have minimal negative effect on fibroblast proliferation and the greatest positive effect on the collagen secretion.
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