title: Randomly oriented, upright SiO2 coated nanorods for reduced adhesion of mammalian cells.
abstract: Cell interactions with nanostructures are of broad interest because of applications in controlling tissue response to biomedical implants. Here we show that dense and upright SiO2 coated nanorods nearly eliminate cell adhesion in fibroblasts and endothelial cells. The lack of adhesion is not due to a decrease in matrix protein adsorption on the nanostructures, but rather an inability of cells to assemble focal adhesions. Using spatially patterned nanorods, we show that cells display a preference for flat regions of the surface. Our results support a model in which interfering with nanoscale spacing of ligated integrins results in reduced cell adhesion and subsequent cell death. We propose that dense monolayers of nanorods are a promising nanotechnology for preventing mammalian cell fouling of biomaterials.
authors.affiliation: Department of Chemical Engineering, University of Florida, Gainesville, FL 32611, USA.
authors.forename: Jiyeon
authors.initials: J
authors.lastname: Lee
authors.forename: Byung Hwan
authors.initials: BH
authors.lastname: Chu
authors.forename: Ke-Hung
authors.initials: KH
authors.lastname: Chen
authors.forename: Fan
authors.initials: F
authors.lastname: Ren
authors.forename: Tanmay P
authors.initials: TP
authors.lastname: Lele
mesh_terms: D000327:Adsorption / Q000187:drug effects; D000818:Animals; D002448:Cell Adhesion / Q000187:drug effects; D002465:Cell Movement / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects; D020099:Coated Materials, Biocompatible / Q000494:pharmacology*; D042783:Endothelial Cells / Q000166:cytology* / Q000187:drug effects*; D005347:Fibroblasts / Q000166:cytology* / Q000187:drug effects*; D005353:Fibronectins / Q000378:metabolism; D005898:Glass; D006801:Humans; D051379:Mice; D008856:Microscopy, Fluorescence; D041681:NIH 3T3 Cells; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure; D012235:Rhodamines / Q000378:metabolism; D012822:Silicon Dioxide / Q000494:pharmacology*; D014867:Water / Q000737:chemistry
chemical_list: D020099:Coated Materials, Biocompatible; D005353:Fibronectins; D012235:Rhodamines; D014867:Water; D012822:Silicon Dioxide