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Proteomic analysis of Staphylococcus aureus biofilms grown in vitro on mechanical heart valve leaflets
Author(s) -
Bénard Laetitia,
Litzler PierreYves,
Cosette Pascal,
Lemeland JeanFrançois,
Jouenne Thierry,
Junter GuyAlain
Publication year - 2008
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.31941
Subject(s) - biofilm , microbiology and biotechnology , biology , staphylococcus aureus , bacteria , in vitro , leaflet (botany) , adhesion , chemistry , biochemistry , botany , genetics , organic chemistry
Abstract The in vitro colonization of three commercial heart valve leaflets by Staphylococcus aureus was investigated. The leaflets, made of pyrolytic carbon alloyed with or without silicon, displayed similar surface properties (wettability, roughness) and were readily colonized by S. aureus that formed patchy biofilms on the three supports. A proteomic approach was used to assess the physiological status of biofilm populations by comparing their protein maps to those of bacteria cultured as free cells in the presence or absence of biofilm substratum. Principal component analysis (PCA) revealed, for each tested leaflet, statistical relationships between the protein maps of the biofilm and free‐floating microbial populations. A spot‐by‐spot comparison of protein levels on two‐dimensional electropherograms showed that many proteins were accumulated or underproduced by microbial populations grown in the presence of a leaflet compared with protein levels in control free populations. The number of accumulated proteins was noticeably higher than that of underproduced polypeptides. This protein overproduction was emphasized in biofilm populations. Several proteins, some of which were identified, were differentially produced by both surface‐associated planktonic and biofilm‐grown cell populations compared with control free‐cell ones cultured in the absence of leaflet, whatever the leaflet tested. The potential of this proteomic approach for fighting against microbial adhesion and biofilm formation is discussed. © 2008 Wiley Periodicals, Inc. J Biomed Mater Res, 2009