Abstract
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 mu M), chrysoidine (0.1-2 mu M), and mixtures of benzo-a-pyrene (BaP) and sodium dichromate were found (from 0.01 mu M BaP & 0.1 mu M sodium dichromate to 0.25 mu M BaP & 0.75 mu M sodium dichromate). Transcriptomic analyses using Agilent D. magna oligonucleotide microarrays were undertaken to assess the effect of a mixture of sodium dichromate and BaP (designed to produce both adducted and oxidised DNA) on gene transcription. Neonates (
Original language | English |
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Pages (from-to) | 192-204 |
Number of pages | 13 |
Journal | Aquatic Toxicology |
Volume | 104 |
Issue number | 3-4 |
Early online date | 30 Apr 2011 |
DOIs | |
Publication status | Published - 1 Aug 2011 |
Keywords
- DNA damage
- Microarray
- Genotoxicity
- Daphnia
- Genomics