Co-exposure to titanium dioxide nanoparticles (NpTiO2) and lead at environmentally relevant concentrations in the Neotropical fish species Hoplias intermedius

Publication date: Available online 8 September 2018Source: Toxicology ReportsAuthor(s): Taynah Vicari, Ana Carolina Dagostim, Tatiane Klingelfus, Gabrieli Limberger Galvan, Patrícia Sampaio Monteiro, Letícia da Silva Pereira, Helena Cristina Silva de Assis, Marta Margarete CestariAbstractGrowing production and utilization of titanium dioxide nanoparticles (NpTiO2) invariably lead to their accumulation in oceans, rivers and other water bodies, thus increasing the risk to the welfare of this ecosystem. The progressive launch of these nanoparticles in the environment has been accompanied by concern in understanding the dynamics and the toxic effect of these xenobiotic in different ecosystems, either on their own or in tandem with different contaminants (such as organic compounds and heavy metals), possibly altering their toxicity. Nevertheless, it remains unknown if these combined effects may induce damage in freshwater organisms. Therefore, this study aimed to analyze the consequences caused by NpTiO2, after a waterborne exposure of 96 h to a Neotropical fish species Hoplias intermedius, as well as after a co-exposure with lead, whose effects for fish have already been well described in the literature. The characterization of NpTiO2 stock suspension was carried out in order to provide additional information and revealed a stable colloidal suspension. As a result, NpTiO2 showed some genotoxic effects which were observed by comet assay in gill, kidney and brain ce...
Source: Toxicology Reports - Category: Toxicology Source Type: research

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