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In vitro toxicity of zinc oxide nanoparticles: a review

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Abstract

The toxic effect of ZnO nanoparticles is due to their solubility. ZnO nanoparticles dissolve in the extracellular region, which in turn increases the intracellular [Zn2+] level. The mechanism for increased intracellular [Zn2+] level and ZnO nanoparticles dissolution in the medium is still unclear. Cytotoxicity, increased oxidative stress, increased intracellular [Ca2+] level, decreased mitochondrial membrane potential, and interleukin-8 productions occur in the BEAS-2B bronchial epithelial cells and A549 alveolar adenocarcinoma cells following the exposure of ZnO nanoparticles. Confluent C2C12 cells are more resistant to ZnO nanoparticles compared to the sparse monolayer. Loss of 3T3-L1 cell viability, membrane leakage, and morphological changes occurs due to exposure of ZnO nanoparticles. ZnO nanoparticle induces cytotoxicity and mitochondrial dysfunction in RKO colon carcinoma cells. The occurrence of apoptosis, increased ROS level, reduced mitochondrial activity and formation of tubular intracellular structures are reported following exposure of ZnO nanoparticles in skin cells. Macrophages, monocytes, and dendritic cells are affected by ZnO nanoparticles. In addition, genotoxicity is also induced. The present review summarizes the literature on in vitro toxicity of ZnO nanoparticles (10–100 nm) on various cell lines.

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Acknowledgments

This paper work was supported by KU Research Professor Program of Konkuk University, Seoul, South Korea.

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  1. Department of Bioresources and Food Sciences, Konkuk University, Seoul, South Korea

    Muthuraman Pandurangan & Doo Hwan Kim

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  1. Muthuraman Pandurangan
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Pandurangan, M., Kim, D.H. In vitro toxicity of zinc oxide nanoparticles: a review. J Nanopart Res 17, 158 (2015). https://doi.org/10.1007/s11051-015-2958-9

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