JOURNAL ARTICLE

Toxicity of ZnO nanoparticles in healthy adult mice

Mohammad Esmaeillou, Mohammad Moharamnejad, Ramin Hsankhani, Ali Asghar Tehrani, Hamid Maadi
Environmental Toxicology and Pharmacology 2013, 35 (1): 67-71
23262039
In this study, we extended previous work to evaluate the oral toxicity of ZnO nanoparticles and their possible effects on different serum-elements and sexual hormones in the mouse. The histopathological changes have also been examined. Significant recorded increases in alanine aminotransferase and aspartate aminotransferase activity in all mice exposed to ZnO nanoparticles suggest that these nanoparticles can cause hepatic injury. Hepatocyte necrosis and other pathological observations also confirmed liver damage. Moreover, Glomeruli segmentation, hydropic degeneration in epithelial cells, necrosis of epithelial cells in tubules and swelling in epithelial cells of proximal tubules were found in all kidney tissues, which demonstrated that ZnO nanoparticles have severe toxicological effects on kidney. Serous inflammation, severe hyperemia in alveoli, and edema were observed as pathological findings in the lung which suggest that the lung is the third target tissue of the ZnO nanoparticles.

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