title: Carbohydrate-containing components of biofilms produced in vitro by some staphylococcal strains related to orthopaedic prosthesis infections.
abstract: The capacity of coagulase-negative staphylococci to colonize implanted medical devices is generally attributed to their ability to produce biofilms. Biofilm of the model strain of Staphylococcus epidermidis RP62A was shown to contain two carbohydrate-containing moieties, a linear poly-beta-(1-->6)-N-acetyl-D-glucosamine (PNAG) and teichoic acid. In the present study, we investigated several biofilm-producing staphylococci isolated from infected orthopaedic implants and characterized the composition of the laboratory-grown biofilms using chemical analysis and 1H nuclear magnetic resonance spectroscopy. Extracellular teichoic acid was produced by all strains studied. Some of the clinical strains were shown to produce biofilms with compositions similar to that of the model strain, containing a varying amount of PNAG. The chemical structure of PNAG of the clinical strains was similar to that previously described for the model strains S. epidermidis RP62A and Staphylococcus aureus MN8m, differing only in the amount of charged groups. Biofilms of the strains producing a substantial amount of PNAG were detached by dispersin B, a PNAG-degrading enzyme, while being unsusceptible to proteinase K treatment. On the other hand, some strains produced biofilms without any detectable amount of PNAG. The biofilms of these strains were dispersed by proteinase K, but not by dispersin B.
authors.affiliation: Laboratoire de Recherche sur les Biomatériaux et les Biotechnologies INSERM-ERI 002, Université du Littoral-Côte d'Opale, Boulogne-sur-mer, France.
authors.forename: Irina
authors.initials: I
authors.lastname: Sadovskaya
authors.forename: Philippe
authors.initials: P
authors.lastname: Chaignon
authors.forename: Grigorij
authors.initials: G
authors.lastname: Kogan
authors.forename: Ali
authors.initials: A
authors.lastname: Chokr
authors.forename: Evgeny
authors.initials: E
authors.lastname: Vinogradov
authors.forename: Saïd
authors.initials: S
authors.lastname: Jabbouri
mesh_terms: D018441:Biofilms / Q000254:growth & development*; D005109:Extracellular Matrix / Q000737:chemistry / Q000378:metabolism; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D019906:Nuclear Magnetic Resonance, Biomolecular; D019736:Prostheses and Implants / Q000382:microbiology*; D016459:Prosthesis-Related Infections / Q000382:microbiology; D013203:Staphylococcal Infections / Q000382:microbiology; D013212:Staphylococcus epidermidis / Q000302:isolation & purification / Q000378:metabolism / Q000502:physiology*; D013682:Teichoic Acids / Q000096:biosynthesis* / Q000737:chemistry; D047071:beta-Glucans / Q000737:chemistry / Q000378:metabolism*
chemical_list: D013682:Teichoic Acids; D047071:beta-Glucans; C505465:poly-N-acetyl-1-6-glucosamine