Role of protein environment and bioactive polymer grafting in the S-epidermidis response to titanium alloy for biomedical applications

• Type: Article in International Scientific Journal
• Date: 2014

Authors

Daniel M Vasconcelos (Author) Other; Celine Falentin Daudre (Author) Other; Daniel Blanquaert (Author) Other; Damien Thomas (Author) Other; Pedro L Granja (Author) FEUP; Veronique Migonney (Author) Other

Journal

Title: Materials Science and Engineering C

Vol. 45

Pages: 176-183

ISSN: 0928-4931

Publisher: Elsevier

Indexing

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Scientific classification

CORDIS: Health sciences

FOS: Engineering and technology > Materials engineering

Other information

Authenticus ID: P-009-V86

DOI: 10.1016/j.msec.2014.08.054

Abstract (EN): Joint implant-related infections, namely by Staphylococci, are a worldwide problem, whose consequences are dramatic Various methods are studied to fight against these infections. Here, the proposed solution consists in grafting a bioactive polymer on joint implant surfaces in order to allow the control of the interactions with the living system. In this study, sodium styrene sulfonate, bearing sulfonate groups, was grafted on the surface of titanium alloys. Scanning Electron Microscopy, colorimetric method, Fourier-transformed infrared spectroscopy and contact angle measurements were applied to characterize the surfaces. Bacterial adhesion studies were studied on poly(sodium styrene sulfonate) grafted Ti6Al4V and Ti6Al4V surfaces previously adsorbed by proteins involved in the bacteria adhesion process. Fibrinogen and fibronectin were demonstrated to increase staphylococcal adhesion on Ti6Al6V surfaces. Ti6Al4V grafted sodium styrene sulfonate surfaces inhibited the adhesion of Staphylococcus epidermidis in 37% and 13% on pre-adsorbed surfaces with fibrinogen anal fibronectin, respectively. The mechanism of the observed inhibiting bacteria adhesion properties is related to the differences of proteic conformations induced by poly(sodium styrene sulfonate) grafting. (C) 2014 Elsevier B.V. All rights reserved.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8