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Current Pharmaceutical Design


ISSN (Print): 1381-6128
ISSN (Online): 1873-4286

Review Article

Antibacterial Metal Oxide Nanoparticles: Challenges in Interpreting the Literature

Author(s): Usha Kadiyala, Nicholas A. Kotov and J. Scott VanEpps*

Volume 24, Issue 8, 2018

Page: [896 - 903] Pages: 8

DOI: 10.2174/1381612824666180219130659

Price: $65


Metal oxide nanoparticles (MO-NPs) are known to effectively inhibit the growth of a wide range of Gram-positive and Gram-negative bacteria. They have emerged as promising candidates to challenge the rising global issue of antimicrobial resistance. However, a comprehensive understanding of their mechanism of action and identifying the most promising NP materials for future clinical translation remain a major challenge due to variations in NP preparation and testing methods. With various types of MO-NPs being rapidly developed, a robust, standardized, in vitro assessment protocol for evaluating the antibacterial potency and efficiency of these NPs is needed. Calculating the number of NPs that actively interact with each bacterial cell is critical for assessing the dose response for toxicity. Here we discuss methods to evaluate MO-NPs antibacterial efficiency with focus on issues related to NPs in these assays. We also highlight sources of experimental variability including NP preparation, initial bacterial concentration, bacterial strains tested, culture microenvironment, and reported dose.

Keywords: Metal oxides, bacteria, nanoparticles, assembly/agglomeration, antibiotic resistance, dose response.

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