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BioMed Research International
Volume 2018, Article ID 1923606, 14 pages
https://doi.org/10.1155/2018/1923606
Review Article

Antimicrobial Activity of Cerium Oxide Nanoparticles on Opportunistic Microorganisms: A Systematic Review

Science Center of Health, Federal University of Paraíba, 58.051-900 João Pessoa, PB, Brazil

Correspondence should be addressed to Isabela Albuquerque Passos Farias; moc.liamg@sairafsossapasi

Received 19 September 2017; Accepted 13 December 2017; Published 23 January 2018

Academic Editor: Jinsong Ren

Copyright © 2018 Isabela Albuquerque Passos Farias et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

An evaluation of studies of biologically active nanoparticles provides guidance for the synthesis of nanoparticles with the goal of developing new antibiotics/antifungals to combat microbial resistance. This review article focuses on the physicochemical properties of cerium oxide nanoparticles (CeNPs) with antimicrobial activity. Method. This systematic review followed the Guidelines for Transparent Reporting of Systematic Reviews and Meta-Analyses. Results. Studies have confirmed the antimicrobial activity of CeNPs (synthesized by different routes) using nitrate or chloride salt precursors and having sizes less than 54 nm. Conclusion. Due to the lack of standardization in studies with respect to the bacteria and CeNP concentrations assayed, comparisons between studies to determine more effective routes of synthesis are difficult. The mechanism of CeNP action likely occurs through oxidative stress of components in the cell membrane of the microorganism. During this process, a valence change occurs on the CeNP surface in which an electron is gained and Ce4+ is converted to Ce3+.