Document Detail


Structural organization of the cytoskeleton in SV40 human corneal epithelial cells cultured on nano- and microscale grooves.
MedLine Citation:
PMID:  18626907     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
Nancy W Karuri; Paul F Nealey; Christopher J Murphy; Ralph M Albrecht
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Scanning     Volume:  30     ISSN:  0161-0457     ISO Abbreviation:  Scanning     Publication Date:    2008 Sep-Oct
Date Detail:
Created Date:  2008-10-16     Completed Date:  2008-12-10     Revised Date:  2014-09-15    
Medline Journal Info:
Nlm Unique ID:  7903371     Medline TA:  Scanning     Country:  United States    
Other Details:
Languages:  eng     Pagination:  405-13     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Antigens, CD29 / 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:
P30 EY016665/EY/NEI NIH HHS; P30 EY016665-01/EY/NEI NIH HHS; R01 EY016134/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:
0/Antigens, CD29; Z4152N8IUI/Silicon
Comments/Corrections

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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