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Engineered Metal Oxide Nanocrystallites: Antibacterial Activity and Stress Mechanism

  • Anil K. SureshEmail author
Chapter
Part of the SpringerBriefs in Molecular Science book series (BRIEFSMOLECULAR)

Abstract

Nanoparticles are being developed for several research as well as medicinal and engineering implications. Following them a host of new potential health issues due to their size-dependent larger surface area and high reactivity. In this brief chapter, an introduction on the likely interactions of nanoparticles with biotic environment, various possibilities of these man-made nanoparticles coming in contact with the environment and thereby consequences will be discussed. This will be illustrated using our recent work on the effects of various sizes of engineered cerium oxide nanoparticles on the growth and viability of several Gram-negative and Gram-positive microorganisms. The relation between the growth inhibition, reactive oxygen species (ROS) generation, and up- and/or downregulation of transcriptional stress genome using E. coli will be discussed. How different cerium oxide nanocrystallites were synthesized by solvent-free hydrothermal-based approach so as to eliminate cross contamination from the use of toxic solvents and surfactants. Further, utilization of advanced technique like the transmission electron microscopy and microarray-based transcriptional profiling to evaluate the bacterial response mechanisms will be described.

Keywords

Antibacterial Biotic environment Metal oxide Stress mechanism 

Reference

  1. 1.
    Pelletier DA, Suresh AK, Holton GA, McKeown CK, Wang W, Gu B, Mortensen NP, Allison DP, Joy DC, Allison MR, Brown SD, Phelps TJ, Doktycz MJ (2010) Engineered cerium oxide nanoparticles: effects on bacterial growth and viability. Appl Environ Microbiol 76(24):7981–7989CrossRefGoogle Scholar

Copyright information

© The Author(s) 2012

Authors and Affiliations

  1. 1.Department of Molecular MedicineBeckman Research Institute, City of HopeDuarteUSA

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