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Cell architecture–cell function dependencies on titanium arrays with regular geometry
- Source :
- Biomaterials. 31:5729-5740
- Publication Year :
- 2010
- Publisher :
- Elsevier BV, 2010.
-
Abstract
- Knowledge about biocomplexity of cell behavior in dependence on topographical characteristics is of clinical relevance for the development of implant designs in tissue engineering. The aim of this study was to find out cell architecture–cell function dependencies of human MG-63 osteoblasts on titanium (Ti) arrays with regular geometry. We compared cubic pillar structures (SU-8, dimension 3 × 3 × 5 and 5 × 5 × 5 μm) with planar samples. Electrochemical surface characterization revealed a low amount of surface energy (including polar component) for the pillar-structured surfaces, which correlated with a reduced initial cell adhesion and spreading. Confocal microscopy of cell’s actin cytoskeleton revealed no stress fiber organization instead, the actin was concentrated in a surface geometry-dependent manner as local spots around the pillar edges. This altered cell architecture resulted in an impaired MG-63 cell function – the extracellular matrix proteins collagen-I and bone sialo protein (BSP-2) were synthesized at a significantly lower level on SU-8 pillar structures; this was accompanied by reduced β3-integrin expression. To find out physicochemical factors pertaining to geometrically microstructured surfaces and their influence on adjoining biosystems is important for the development of biorelevant implant surfaces.
- Subjects :
- Materials science
Stress fiber
Surface Properties
Biophysics
Biocompatible Materials
Bioengineering
Geometry
Cell Line
Biomaterials
Extracellular matrix
Tissue engineering
Cell Adhesion
Electrochemistry
Humans
Cell adhesion
Cytoskeleton
Actin
Titanium
Extracellular Matrix Proteins
Osteoblasts
Adhesion
Actin cytoskeleton
Actins
Surface energy
Mechanics of Materials
Ceramics and Composites
Subjects
Details
- ISSN :
- 01429612
- Volume :
- 31
- Database :
- OpenAIRE
- Journal :
- Biomaterials
- Accession number :
- edsair.doi.dedup.....4d3f4c5e82a6180c1af971d9dd111617
- Full Text :
- https://doi.org/10.1016/j.biomaterials.2010.03.073