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Large scale gene expression analysis of osteoblasts cultured on three different Ti-6Al-4V surface treatments

Record type: Article

To improve implant biocompatibility, we developed a simple cost-effective thermal surface treatment allowing an increase in the oxide layer thickness of a titanium (Ti) alloy used in orthopaedic implants. The goal of this study was to test in vitro the reaction of osteoblasts to the developed surface treatment and to compare it to the osteoblast reaction to two other surface treatments currently used in the practice of implant surgery. Quantification of osteoblast gene expression on a large scale was used in this study. The kinetics of gene expression over 120 h was followed for 58 genes to quantify the effect of the developed surface treatment. Twenty eight genes were further selected to compare the effects of surface treatments on osteoblasts. Based on the genes studied, we could propose a general pathway for the cell reaction according to the surface treatments used: (1) metal ion release changes the time course of gene expression in the FAK pathway; (2) once the accumulation of metal ions released from the Ti surface exceeds a threshold value, cell growth is diminished and apoptosis may be activated; (3) PTK up-regulation is also induced by metal ion release; (4) the expression of Bcl-2 family and Bax may suggest that metal ions induce apoptosis. The developed treatment seems to increase the Ti–6Al–4V biocompatibility as highlighted by the lower impact of this treatment by the different pathways studied, on the lower inflammatory reaction that could be induced, as well as by the lower induced osteoblast apoptosis compared to the two other surface treatments.

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Citation

Ku, C.H., Browne, M., Gregson, P.J., Corbeil, J. and Pioletti, D.P. (2002) Large scale gene expression analysis of osteoblasts cultured on three different Ti-6Al-4V surface treatments Biomaterials, 23, (21), pp. 4193-4202. (doi:10.1016/S0142-9612(02)00161-8).

More information

Published date: 2002
Keywords: osteoblast, implant, surface treatment, gene expression, apoptosis, cdna microarray

Identifiers

Local EPrints ID: 22048
URI: http://eprints.soton.ac.uk/id/eprint/22048
ISSN: 0142-9612
PURE UUID: 7a42b47c-d3a7-4675-88a7-c3bd543fa413
ORCID for M. Browne: ORCID iD orcid.org/0000-0001-5184-050X

Catalogue record

Date deposited: 15 Mar 2006
Last modified: 17 Jul 2017 16:23

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Contributors

Author: C.H. Ku
Author: M. Browne ORCID iD
Author: P.J. Gregson
Author: J. Corbeil
Author: D.P. Pioletti

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