期刊
FOOD AND CHEMICAL TOXICOLOGY
卷 84, 期 -, 页码 55-63出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.fct.2015.07.008
关键词
Drosophila melanogaster; Micronuclei; Mutagenicity; SMART; V79 cells; Homologous recombination
资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [304376-2010-8]
- Fundacao de Amparo a Pesquisa do Estado de Minas Gerais (FAPEMIG)
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)
- Universidade de Franca (UNIFRAN)
- Universidade Federal de Uberlandia (UFU)
In this study, we evaluated the toxic and genotoxic potential of zinc oxide nanoparticles (ZnO NPs) of 20 nm and the mutagenic potential of these ZnO NPs as well as that of an amorphous ZnO. Toxicity was assessed by KIT colorimetric assay. ZnO NPs were toxic at concentrations equal to or higher than 240.0 mu m. Genotoxicity was assessed by in vitro Cytokinesis Block Micronucleus Assay (CBMN) in V79 cells. ZnO NPs were genotoxic at 120.0 mu M. The mutagenic potential of amorphous ZnO and the ZnO NPs was assayed using the wing Somatic Mutation and Recombination Test (SMART) of Drosophila melanogaster. In the Standard cross, the amorphous ZnO and ZnO NPs were not mutagenic. Nevertheless, Marker trans-heterozygous individuals from the High bioactivation cross treated with amorphous ZnO (6.25 mM) and ZnO NPs (12.50 mM) displayed a significant increased number of mutant spots when compared with the negative control. In conclusion, the results were not dose related and indicate that only higher concentrations of ZnO NPs were toxic and able to induce genotoxicity in V79 cells. The increase in mutant spots observed in D. melanogaster was generated due to mitotic recombination, rather than mutational events. (C) 2015 Elsevier Ltd. All rights reserved.
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