title: Proteomic analysis of arsenite - mediated multiple antibiotic resistance in Yersinia enterocolitica biovar 1A.
abstract: Arsenic is one of the most important global environmental pollutants. In the present study, fifty one clinical strains of Yersinia enterocolitica biovar 1A showed high resistance to arsenite and arsenate. The minimum inhibitory concentration (MIC) of arsenite (0.625-20 mM) was lower than arsenate (10-80 mM). Growth of Y. enterocolitica in 2 mM arsenite led to 2-8 fold increase in MICs of the five antibiotics (amikacin, ciprofloxacin, gentamycin, kanamycin and tetracycline), suggesting expression of arsenite-induced multiple antibiotic resistance among the strains. Proteomic analysis of Y. enterocolitica revealed differential expression of certain proteins following arsenite exposure, which included a putative outer membrane porin (OmpA) and a putative amino acid transporter protein. In conclusion, modulation of membrane permeability may be involved in the induction of arsenite-mediated expression of multiple antibiotic resistance in Y. enterocolitica.
authors.affiliation: Microbial Pathogenicity Laboratory, Department of Microbiology, University of Delhi South Campus, Benito Juarez Road, New Delhi, India.
authors.forename: Sarita
authors.initials: S
authors.lastname: Mallik
authors.forename: Jugsharan Singh
authors.initials: JS
authors.lastname: Virdi
authors.forename: Atul Kumar
authors.initials: AK
authors.lastname: Johri
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology; D001149:Arsenates / Q000633:toxicity; D018053:Arsenites / Q000633:toxicity*; D001426:Bacterial Proteins / Q000032:analysis*; D024881:Drug Resistance, Bacterial; D020869:Gene Expression Profiling; D008826:Microbial Sensitivity Tests; D020543:Proteome / Q000032:analysis*; D013312:Stress, Physiological; D015008:Yersinia enterocolitica / Q000737:chemistry* / Q000187:drug effects*
chemical_list: D000900:Anti-Bacterial Agents; D001149:Arsenates; D018053:Arsenites; D001426:Bacterial Proteins; D020543:Proteome; C015001:arsenite; C025657:arsenic acid