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Updated: May 1, 2026

Author Spotlight: Exploring the Antibacterial Effects of Zinc Oxide Nanoparticles in Overcoming Antibiotic Resistance
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Reducing ZnO nanoparticle cytotoxicity by surface modification.

Mingdeng Luo1, Cenchao Shen, Bryce N Feltis

  • 1School of Chemistry, Monash University, Clayton, VIC 3800, Australia. terry.turney@monash.edu.

Nanoscale
|April 18, 2014
PubMed
Summary
This summary is machine-generated.

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Surface coatings on zinc oxide (ZnO) nanoparticles influence their toxicity by controlling cellular uptake, not by changing dissolved zinc levels within immune cells. PEGylation reduced ZnO nanoparticle cytotoxicity by limiting cellular entry.

Area of Science:

  • Environmental Science
  • Nanotechnology
  • Toxicology

Background:

  • Engineered nanomaterials like zinc oxide (ZnO) nanoparticles are widely used, necessitating research into their toxicological profiles.
  • Understanding nanoparticle surface chemistry is crucial for predicting and controlling their biological interactions.
  • The behavior of ZnO nanoparticles within human immune cells requires detailed investigation.

Purpose of the Study:

  • To determine the disposition of ZnO nanoparticles within human immune cells.
  • To investigate the influence of dose and surface coating on ZnO nanoparticle uptake and dissolution.
  • To elucidate the relationship between ZnO nanoparticle surface properties, cellular uptake, and cytotoxicity.

Main Methods:

  • Quantification of total zinc and proportions of extra- and intracellular dissolved zinc in human immune cells exposed to ZnO nanoparticles.

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  • Assessment of ZnO nanoparticle uptake and cytotoxicity as a function of dose and surface modification (e.g., PEGylation).
  • Analysis of the protein corona formed on nanoparticle surfaces and its effect on cellular interactions.

    • Main Results:

    • Intracellular soluble zinc levels showed minimal variation with dose above a certain threshold or with different surface coatings.
    • PEGylation of ZnO nanoparticles decreased cellular uptake, leading to reduced cytotoxicity.
    • The formation of a minimal protein corona on PEGylated ZnO nanoparticles was associated with reduced cellular uptake.

    Conclusions:

    • The surface properties of ZnO nanoparticles primarily regulate cytotoxicity by controlling cellular uptake.
    • Altering intracellular or extracellular zinc dissolution is not the main mechanism by which surface properties affect ZnO nanoparticle toxicity.
    • Surface modifications like PEGylation can mitigate ZnO nanoparticle toxicity by modulating their interaction with immune cells.