title: Interaction of preosteoblasts with surface-immobilized collagen-based nanotubes.
abstract: In a previous work, we demonstrated the successful use of electrophoretic deposition (EPD) to immobilize collagen-based nanotubes onto indium-tin-oxide-coated glass (ITO glass), leading to the creation of biointerfaces with protein-based chemistry and topography [1]. In this work, we present a first study of preosteoblasts behavior in contact with surface-immobilized collagen-based nanotubes. Changes in cell morphology after their interaction with ITO glass modified with collagen-based nanotubes were studied using fluorescence microscopy and compared to those observed on virgin ITO glass as well as on ITO glass on which a collagen layer was simply adsorbed. Scanning electron microscopy (SEM) was used to study interactions of cell filopodias with the deposited nanotubes. Cytotoxicity of these biointerfaces was examined as well in short term cultures, using Alamar blue assay. Cells showed particular morphologies on ITO glass coated with nanotubes compared to virgin ITO glass or collagen adsorbed layer on ITO glass. High resolution SEM images suggest that apart from cell morphology, length and thickness of filopodias seem to be significantly affected by surface modification with collagen-based nanotubes. Moreover, nanotube-coated ITO glass did not show any obvious cytotoxicity in short term culture, opening new perspectives for the surface modification of biomaterials. We show the versatility of the proposed surface modification procedure by tailoring biointerfaces with a mixture of micro- and nanometer-scale collagen-based tubes.
authors.affiliation: Institute of Condensed Matter and Nanosciences - Bio & Soft Matter (IMCN/BSMA), Université catholique de Louvain, Croix du Sud, 1 (Box L7.04.01), B-1348 Louvain-la-Neuve, Belgium.
authors.forename: Deepak M
authors.initials: DM
authors.lastname: Kalaskar
authors.affiliation: Institute of Condensed Matter and Nanosciences - Bio & Soft Matter (IMCN/BSMA), Université catholique de Louvain, Croix du Sud, 1 (Box L7.04.01), B-1348 Louvain-la-Neuve, Belgium.
authors.forename: Sophie
authors.initials: S
authors.lastname: Demoustier-Champagne
authors.affiliation: Institute of Condensed Matter and Nanosciences - Bio & Soft Matter (IMCN/BSMA), Université catholique de Louvain, Croix du Sud, 1 (Box L7.04.01), B-1348 Louvain-la-Neuve, Belgium. Electronic address: christine.dupont@uclouvain.be.
authors.forename: Christine C
authors.initials: CC
authors.lastname: Dupont-Gillain
mesh_terms: D000818:Animals; D002417:Cattle; D002452:Cell Count; D002460:Cell Line; D049109:Cell Proliferation / Q000187:drug effects; D048430:Cell Shape / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects; D003094:Collagen / Q000494:pharmacology*; D004586:Electrophoresis; D051379:Mice; D008856:Microscopy, Fluorescence; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure; D010006:Osteoblasts / Q000166:cytology* / Q000187:drug effects; D011554:Pseudopodia / Q000187:drug effects / Q000378:metabolism; D017971:Tin Compounds / Q000494:pharmacology
chemical_list: D017971:Tin Compounds; C109984:indium tin oxide; D003094:Collagen
keywords: Biointerface; Cell–material interactions; Collagen; Nano/micro topography; Nanotube