Transcriptomics

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Transcriptomic profiles of zebrafish embryos exposed to silver (nanoparticles, bulk and ions) using HT-SuperSAGE in a Illumina GA2 platform


ABSTRACT: Silver nanoparticles cause toxicity in exposed organisms and are an environmental health concern. The mechanisms of silver nanoparticle toxicity, however, remain unclear. We examined the effects of exposure to silver in nano-, bulk- and ionic forms on zebrafish embryos (Danio rerio) using a Next Generation Sequencing approach in an Illumina platform (High-Throughput SuperSAGE). Significant alterations in gene expression were found for all treatments and many of the gene pathways affected, most notably those associated with oxidative phosphorylation and protein synthesis, overlapped strongly between the three treatments indicating similar mechanisms of toxicity for the three forms of silver studied. Changes in oxidative phosphorylation indicated a down-regulation of this pathway at 24h of exposure, but with a recovery at 48h. This finding was consistent with a dose-dependent decrease in oxygen consumption at 24h, but not at 48h, following exposure to silver ions. Overall, our data provide support for the hypothesis that the toxicity caused by silver nanoparticles is principally associated with bioavailable silver ions in exposed zebrafish embryos. These findings are important in the evaluation of the risk that silver particles may pose to exposed vertebrate organisms. mRNA profiles of whole zebrafish embryos at 24 and 48 hours post-fertilisation (hpf) exposed to silver in nano, bulk and ionic forms were generated by deep sequencing using HT-SuperSAGE (Illumina GA2).

ORGANISM(S): Danio rerio  

SUBMITTER: Katie Ball   Ronny van Aerle  Eliane de-Bastos  Timothy Booth  Anke Lange  Charles R Tyler  Konrad Paszkiewicz  Alex Moorhouse  Blair D Johnston  Eduarda M Santos 

PROVIDER: E-GEOD-38125 | ArrayExpress | 2013-06-17

SECONDARY ACCESSION(S): GSE38125SRP013309PRJNA167302

REPOSITORIES: GEO, ArrayExpress, ENA

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Publications

Molecular mechanisms of toxicity of silver nanoparticles in zebrafish embryos.

van Aerle Ronny R   Lange Anke A   Moorhouse Alex A   Paszkiewicz Konrad K   Ball Katie K   Johnston Blair D BD   de-Bastos Eliane E   Booth Timothy T   Tyler Charles R CR   Santos Eduarda M EM  

Environmental science & technology 20130626 14


Silver nanoparticles cause toxicity in exposed organisms and are an environmental health concern. The mechanisms of silver nanoparticle toxicity, however, remain unclear. We examined the effects of exposure to silver in nano-, bulk-, and ionic forms on zebrafish embryos (Danio rerio) using a Next Generation Sequencing approach in an Illumina platform (High-Throughput SuperSAGE). Significant alterations in gene expression were found for all treatments and many of the gene pathways affected, most  ...[more]

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