纤维连接蛋白
粘附
钽
吸附
材料科学
细胞粘附
纳米技术
细胞生长
化学工程
生物物理学
化学
细胞
复合材料
冶金
生物化学
生物
有机化学
工程类
作者
Alireza Dolatshahi‐Pirouz,T. Jensen,David C. Kraft,Morten Foss,Peter Kingshott,J. Lundsgaard Hansen,A. Nylandsted Larsen,J. Chevallier,Flemming Besenbacher
出处
期刊:ACS Nano
[American Chemical Society]
日期:2010-05-05
卷期号:4 (5): 2874-2882
被引量:164
摘要
The interaction between dental pulp derived mesenchymal stem cells (DP-MSCs) and three different tantalum nanotopographies with and without a fibronectin coating is examined: sputter-coated tantalum surfaces with low surface roughness <0.2 nm, hut-nanostructured surfaces with a height of 2.9 ± 0.6 nm and a width of 35 ± 8 nm, and dome structures with a height of 13 ± 2 nm and a width of 52 ± 14 nm. Using ellipsometry, the adsorption and the availability of fibronectin cell-binding domains on the tantalum surfaces were examined, as well as cellular attachment, proliferation, and vinculin focal adhesion spot assembly on the respective surfaces. The results showed the highest fibronectin mass uptake on the hut structures, with a slightly higher availability of cell-binding domains and the most pronounced formation of vinculin focal adhesion spots as compared to the other surfaces. The proliferation of DP-MSCs was found to be significantly higher on dome and hut surfaces coated with fibronectin compared to the uncoated flat tantalum surfaces. Consequently, the results presented in this study indicate that fibronectin-coated nanotopographies with a vertical dimension of less than 5 nm influence cell adhesion. This rather interesting behavior is argued to originate from the more available fibronectin cell-binding domains observed on the hut structures.
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