Zinc oxide nanoparticle reduced biofilm formation and antigen ۴۳ expressions in uropathogenic Escherichia coli

Objective(s): This study aimed to investigate the effect of zinc oxide nanoparticles (ZnO-np) on biofilm formation and expression of the flu gene in uropathogenic Escherichia coli (UPEC) strains. Materials and Methods: Minimum inhibitory concentration (MIC) of ZnO-np was determined by agar dilution method. The effect of MIC and sub-MIC concentrations of ZnO-np on biofilm formation were determined by microtiter plate assay. The expression level of the flu gene was assessed by Real-Time PCR assay. Results: MIC and sub-MIC ZnO-np concentrations reduced biofilm formation by ۵۰% and ۳۳.۴%, respectively. Sub-MIC ZnO-np concentration significantly reduced the flu gene expression in the UPEC isolates (P<۰.۰۰۰۱). Conclusion: The sub-MIC concentration of ZnO-np reduces biofilm formation and flu gene expression in UPEC isolates. It is suggested to use nanoparticles for coating medical devices to prevent bacterial colonization.

Keywords:

Biofilm , Urinary tract infection , Uropathogenic Escherichia coli , Zinc oxide nanoparticle