Dataset Information


Daphnia genotoxicity experiment

ABSTRACT: Daphnia neonates (100 individuals, 24h post-hatch) and adults (20 individuals, 168h post-hatch) were exposed to DMSO carrier (0.002%), low (0.25 uM sodium dichromate, 0.01 uM benzo-a-pyrene) or high (0.75 uM soduium dichromate, 0.1 uM benzo-a-pyrene) concentrations of a genotoxicant mixture, or were untreated. Untreated controls were sampled at the initial time point, exposed Daphnia were sampled at 6h and 24h post-exposure. Transcriptional profiles were determined using an Agilent oligonucleotide microarray.

ORGANISM(S): Daphnia magna  

SUBMITTER: Tim D Williams  

PROVIDER: E-MTAB-551 | ArrayExpress | 2011-03-01


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Transcriptional responses in neonate and adult Daphnia magna in relation to relative susceptibility to genotoxicants.

David Rhiannon M RM   Dakic Vanja V   Williams Timothy D TD   Winter Matthew J MJ   Winter Matthew J MJ   Chipman J Kevin JK  

Aquatic toxicology (Amsterdam, Netherlands) 20110430 3-4

Little information is available on the responses of lower animals to genotoxic chemicals or on their sensitivity for detecting genotoxic chemicals, especially at different life-stages, despite the established use of the water flea Daphnia magna in ecotoxicity testing. Comet assay methodology was developed and applied to daphnid cells but only limited, non-statistically significant responses to the genotoxicants sodium dichromate (0.2-1 μM), chrysoidine (0.1-2 μM), and mixtures of benzo-a-pyrene  ...[more]

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