| Structural organization of the cytoskeleton in SV40 human corneal epithelial cells cultured on nano- and microscale grooves. | |
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MedLine Citation:
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PMID: 18626907 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The basement membrane of human corneal epithelial cells (HCECs) has a three-dimensional nanoscale architecture, which includes pores, bumps and fibers that may influence cell-substrate adhesion and spreading in the overlying cells. We previously demonstrated that nano- and microscale groove and ridge patterns influence the morphological response and the adhesive response of HCECs to a nominal wall shear stress. Cell-substrate adhesion is mediated by adhesion receptors that bind to extracellular matrix components and anchor the cytoskeleton (CSK) of cells to extracellular elements. Here we investigate the CSK organization in SV40-transformed HCECs grown on nano- and microscale groove and ridge patterns. X-ray lithography was used to fabricate uniform groove and ridge patterns with features ranging in size from 200 nm to 2 microm grooves. Scanning electron microscopy and transmission electron microscopy were used to investigate CSK structure and the distribution of -beta1 integrin adhesion receptors. CSK elements aligned with the patterns; however, the spatial organization of these elements was influenced by feature size. Larger CSK bundles lay on top of the ridges and ran parallel to the patterns, whereas smaller CSK bundles, whose width was proportional to the groove size, spanned the grooves. -Beta1 integrins co-localized with the CSK and had a higher density at the poles of aligned spindle-shaped cells. Differences in organization seen on the different topographical feature sizes may be indicative of differences in extracellular matrix organization. This may explain, in part, previous observations regarding the dependence of cell adhesive responses on the size of topographic features in the substrate. |
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Authors:
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Nancy W Karuri; Paul F Nealey; Christopher J Murphy; Ralph M Albrecht |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Scanning Volume: 30 ISSN: 0161-0457 ISO Abbreviation: Scanning Publication Date: 2008 Sep-Oct |
Date Detail:
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Created Date: 2008-10-16 Completed Date: 2008-12-10 Revised Date: 2012-10-09 |
Medline Journal Info:
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Nlm Unique ID: 7903371 Medline TA: Scanning Country: United States |
Other Details:
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Languages: eng Pagination: 405-13 Citation Subset: IM |
Affiliation:
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Department of Chemical and Biological Engineering, University of Wisconsin, Madison, Wisconsin 53706, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Antigens, CD29
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metabolism Cell Adhesion Cell Line, Transformed Cell Proliferation Cells, Cultured Cytoskeleton / ultrastructure* Epithelium, Corneal / cytology* Humans Microscopy, Electron, Scanning / methods Nanostructures Silicon |
| Grant Support | |
ID/Acronym/Agency:
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P30 EY016665-01/EY/NEI NIH HHS; R01 EY016134-01A2/EY/NEI NIH HHS; R01 EY017367/EY/NEI NIH HHS; R01 EY017367-01A1/EY/NEI NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/Antigens, CD29; 7440-21-3/Silicon |
| Comments/Corrections | |
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