Journal
BRAZILIAN JOURNAL OF MICROBIOLOGY
Volume 50, Issue 3, Pages 791-805Publisher
SPRINGER
DOI: 10.1007/s42770-019-00108-z
Keywords
Biofilm; Iron nanoparticles; Motility; Pseudomonas aeruginosa; Virulence factors
Categories
Funding
- Marine Biotechnology Program - Ministry of Oceans and Fisheries, Republic of Korea [20150220]
- Ministry of Food and Drug Safety of Korea [18162MFDS543]
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Biofilm formation is one of the resistance mechanisms of Pseudomonas aeruginosa against antimicrobial compounds. Biofilm formation also characterizes for the infection and pathogenesis of P. aeruginosa, along with production of various virulence factors. With recent development of nanotechnology, the present study aims to employ the synthetic iron nanoparticle (FeOOH-NP) as an active agent to inhibit the formation of P. aeruginosa biofilm. The FeOOH-NP was synthesized and characterized with rod shape and average size of 40 nm. Inhibition of biofilm formation by the FeOOH-NP is in a concentration-dependent manner, with inhibition of biofilm formation increased as the FeOOH-NP concentration increased. Microscopic observations also confirmed the disruption of the biofilm architecture in the presence of the FeOOH-NP. In addition, the presence of the FeOOH-NP was also found to modulate bacterial motility as well as some other important virulence factors produced simultaneously with biofilm formation. These findings provide insights to anti-biofilm effect of a new iron NP, contributing to the search for an effective agent to combat P. aeruginosa infections resulted from biofilm formation.
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