title: Regulation of human mesenchymal stem cell osteogenesis by specific surface density of fibronectin: a gradient study.
abstract: The success of synthetic bone implants requires good interface between the material and the host tissue. To study the biological relevance of fibronectin (FN) density on the osteogenic commitment of human bone marrow mesenchymal stem cells (hBM-MSCs), human FN was adsorbed in a linear density gradient on the surface of PCL. The evolution of the osteogenic markers alkaline phosphatase and collagen 1 alpha 1 was monitored by immunohistochemistry, and the cytoskeletal organization and the cell-derived FN were assessed. The functional analysis of the gradient revealed that the lower FN-density elicited stronger osteogenic expression and higher cytoskeleton spreading, hallmarks of the stem cell commitment to the osteoblastic lineage. The identification of the optimal FN density regime for the osteogenic commitment of hBM-MSCs presents a simple and versatile strategy to significantly enhance the surface properties of polycaprolactone as a paradigm for other synthetic polymers intended for bone-related applications.
authors.affiliation: 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho , 4806-909 Caldas das Taipas, Guimarães, Portugal.
authors.forename: Ana B
authors.initials: AB
authors.lastname: Faia-Torres
authors.forename: Tolga
authors.initials: T
authors.lastname: Goren
authors.forename: Teemu O
authors.initials: TO
authors.lastname: Ihalainen
authors.forename: Stefanie
authors.initials: S
authors.lastname: Guimond-Lischer
authors.forename: Mirren
authors.initials: M
authors.lastname: Charnley
authors.forename: Markus
authors.initials: M
authors.lastname: Rottmar
authors.forename: Katharina
authors.initials: K
authors.lastname: Maniura-Weber
authors.forename: Nicholas D
authors.initials: ND
authors.lastname: Spencer
authors.forename: Rui L
authors.initials: RL
authors.lastname: Reis
authors.forename: Marcus
authors.initials: M
authors.lastname: Textor
authors.forename: Nuno M
authors.initials: NM
authors.lastname: Neves
mesh_terms: D000469:Alkaline Phosphatase / Q000378:metabolism; D001854:Bone Marrow Cells / Q000737:chemistry / Q000166:cytology / Q000378:metabolism; D002454:Cell Differentiation; D049109:Cell Proliferation; D002478:Cells, Cultured; D003094:Collagen / Q000378:metabolism; D005353:Fibronectins / Q000737:chemistry / Q000378:metabolism*; D006801:Humans; D059630:Mesenchymal Stem Cells / Q000737:chemistry / Q000166:cytology* / Q000378:metabolism; D010012:Osteogenesis; D011091:Polyesters / Q000737:chemistry
chemical_list: D005353:Fibronectins; D011091:Polyesters; C016240:polycaprolactone; D003094:Collagen; D000469:Alkaline Phosphatase
keywords: biomaterials; fibronectin; gradient; mesenchymal stem cells; osteogenesis