title: Capillary electrophoresis study of outer membrane proteins of Pseudomonas strains upon antibiotic treatment.
abstract: Nosocomial wound infections by Pseudomonas aeruginosa strains have increasing importance in orthopaedic surgery. Outer membrane protein composition and cell-surface hydrophobicity of the bacteria have strong influence on adhesion to living tissues or artificial medical devices. Outer membrane proteins of five Pseudomonas strains (KT 2, KT 7, KT 25, KT 28, KT 39) isolated from orthopaedic patients' wounds and one standard strain NIH Hungary 170000 isolated from pus were examined. The capillary electrophoretic patterns of the outer membrane proteins were characteristic to each bacterial strains possessing different relative ratios of major and minor proteins. Antibiotic treatment of bacteria with three antibiotics, cefotaximum, amoxicillinum/clavulinic acid and amikacinum (applied often in prophylaxis and treatment of patients) induced changes in the electrophoretic profiles showing that outer membrane protein composition was altered significantly. The most pronounced alterations in the electrophoretic patterns after antibiotic treatment were obtained in the cases of the strains KT 2, KT 7 and KT 28. The amikacinum administration strongly decreased the relative percentage of the 38800 rel. mol. mass protein in KT 2 (from 20 to 6%). while the relative amount of the same protein increased significantly in KT 7 and KT 28 after cefotaximum treatment (from 2 to 16% and from 12 to 28%, respectively). Decrease in cell-surface hydrophobicity was also observed by salt aggregation test. The results obtained can be used to determine the therapeutic concentrations of antibiotics to induce changes in the adhesion properties of bacteria.
authors.affiliation: Department of Orthopaedics, Faculty of Medicine, University of Pécs, Szigeti út 12, H-7643 Pécs, Hungary.
authors.forename: Tamás
authors.initials: T
authors.lastname: Kustos
authors.forename: Ildikó
authors.initials: I
authors.lastname: Kustos
authors.forename: Edit
authors.initials: E
authors.lastname: Gonda
authors.forename: Béla
authors.initials: B
authors.lastname: Kocsis
authors.forename: György
authors.initials: G
authors.lastname: Szabó
authors.forename: Ferenc
authors.initials: F
authors.lastname: Kilár
mesh_terms: D000583:Amikacin / Q000494:pharmacology / Q000627:therapeutic use; D019980:Amoxicillin-Potassium Clavulanate Combination / Q000494:pharmacology / Q000627:therapeutic use; D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D001425:Bacterial Outer Membrane Proteins / Q000302:isolation & purification*; D002439:Cefotaxime / Q000494:pharmacology / Q000627:therapeutic use; D019075:Electrophoresis, Capillary / Q000379:methods*; D006801:Humans; D008826:Microbial Sensitivity Tests; D011552:Pseudomonas Infections / Q000188:drug therapy / Q000382:microbiology; D011550:Pseudomonas aeruginosa / Q000187:drug effects / Q000378:metabolism*
chemical_list: D000900:Anti-Bacterial Agents; D001425:Bacterial Outer Membrane Proteins; D019980:Amoxicillin-Potassium Clavulanate Combination; D000583:Amikacin; D002439:Cefotaxime