NIMTE OpenIR  > 2017专题
Electron Microscopy Visualization of Vitronectin Adsorbed on -COOH and -NH2 Functionalized Surfaces: Distinctive Spatial Alignment and Regulated Cellular Responses
Hou, Wenjia; Liu, Yi; Zhang, Botao; He, Xiaoyan; Li, Hua
2017
发表期刊ADVANCED MATERIALS INTERFACES
卷号4期号:23
摘要Adsorption of proteins associating with their conformational changes plays crucial roles in regulating biomaterial-cell interactions and consequent tissue responses to implanted biomaterials. This study reports direct visualization of typical serum protein, vitronectin, one of the key adhesive proteins that participate in mediating cell behaviors, upon adsorption on typically designed surfaces. Carbon films with their surfaces being plasma grafted functional groups -COOH and -NH2 are used as the model substrata for this study. Negative-staining electron microscopy technique is employed for visualizing the adsorbed protein and 2D image classification is made and interpreted. Results show that adsorbed vitronectin tends to form multimer aggregate on the -COOH-grafted surfaces, exposing extensively its cell-binding RGD (arginineglycine-aspartic acid) motif for enhanced cell adhesion. The adsorbed vitronectin on the -NH2-grafted surface forms dimer aggregate with the binding sites being enwrapped. The -COOH-grafting triggers enhanced expressions of ITGA5, ITGAV, ITGB1, and ITGB3 of the adhered cells and this is likely attributed to the special spatial alignment of vitronectin upon adsorption. The conformational information of adsorbed vitronectin gained from the single particle electron micro-scopy analyses would shed light on design and construction of appropriate biomaterials surfaces for desired cellular behaviors.
关键词Self-assembled Monolayers Plasminogen-activator Inhibitor-1 S-protein Vitronectin Plasma Vitronectin Adhesive Proteins In-vitro Adsorption Domain Cells Model
学科领域Chemistry ; Materials Science
语种英语
文献类型期刊论文
条目标识符http://ir.nimte.ac.cn/handle/174433/17490
专题2017专题
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GB/T 7714
Hou, Wenjia,Liu, Yi,Zhang, Botao,et al. Electron Microscopy Visualization of Vitronectin Adsorbed on -COOH and -NH2 Functionalized Surfaces: Distinctive Spatial Alignment and Regulated Cellular Responses[J]. ADVANCED MATERIALS INTERFACES,2017,4(23).
APA Hou, Wenjia,Liu, Yi,Zhang, Botao,He, Xiaoyan,&Li, Hua.(2017).Electron Microscopy Visualization of Vitronectin Adsorbed on -COOH and -NH2 Functionalized Surfaces: Distinctive Spatial Alignment and Regulated Cellular Responses.ADVANCED MATERIALS INTERFACES,4(23).
MLA Hou, Wenjia,et al."Electron Microscopy Visualization of Vitronectin Adsorbed on -COOH and -NH2 Functionalized Surfaces: Distinctive Spatial Alignment and Regulated Cellular Responses".ADVANCED MATERIALS INTERFACES 4.23(2017).
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