title: Fibronectin adsorption, cell adhesion, and proliferation on nanostructured tantalum surfaces.
abstract: 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.
authors.affiliation: Department of Physics and Astronomy, Aarhus University, Interdisciplinary Nanoscience Center, Aarhus, Denmark.
authors.forename: A
authors.initials: A
authors.lastname: Dolatshahi-Pirouz
authors.forename: T
authors.initials: T
authors.lastname: Jensen
authors.forename: David Christian
authors.initials: DC
authors.lastname: Kraft
authors.forename: Morten
authors.initials: M
authors.lastname: Foss
authors.forename: Peter
authors.initials: P
authors.lastname: Kingshott
authors.forename: John Lundsgaard
authors.initials: JL
authors.lastname: Hansen
authors.forename: Arne Nylandsted
authors.initials: AN
authors.lastname: Larsen
authors.forename: Jacques
authors.initials: J
authors.lastname: Chevallier
authors.forename: Flemming
authors.initials: F
authors.lastname: Besenbacher
mesh_terms: D000327:Adsorption; D002448:Cell Adhesion / Q000187:drug effects; D049109:Cell Proliferation / Q000187:drug effects; D003599:Cytoskeleton / Q000187:drug effects / Q000378:metabolism; D003782:Dental Pulp / Q000166:cytology; D005353:Fibronectins / Q000737:chemistry* / Q000494:pharmacology*; D022001:Focal Adhesions / Q000187:drug effects; D006801:Humans; D008297:Male; D059630:Mesenchymal Stem Cells / Q000166:cytology / Q000187:drug effects / Q000378:metabolism; D049329:Nanostructures / Q000737:chemistry*; D055503:Protein Multimerization / Q000187:drug effects; D020836:Protein Structure, Quaternary; D013499:Surface Properties; D013635:Tantalum / Q000737:chemistry*; D016596:Vinculin / Q000737:chemistry / Q000378:metabolism; D055815:Young Adult
chemical_list: D005353:Fibronectins; D016596:Vinculin; D013635:Tantalum