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Use of 5-azacytidine in a proof-of-concept study to evaluate the impact of pre-natal and post-natal exposures, as well as within generation persistent DNA methylation changes in Daphnia
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Gonçalves Athanasio, Camila , Sommer, Ulf, Viant, Mark R., Chipman, James Kevin and Mirbahai, Leda (2018) Use of 5-azacytidine in a proof-of-concept study to evaluate the impact of pre-natal and post-natal exposures, as well as within generation persistent DNA methylation changes in Daphnia. Ecotoxicology, 27 (5). pp. 556-568. doi:10.1007/s10646-018-1927-3
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WRAP-use-5-azacytidine-proof-of-concept-study-evaluate-impact-pre-post-natal-exposures-within-generation-persistent-DNA-methylation-changes-daphnia-Mirbahai-2018.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (1695Kb) | Preview |
Official URL: http://dx.doi.org/10.1007/s10646-018-1927-3
Abstract
Short-term exposures at critical stages of development can lead to delayed adverse effects long after the initial stressor has been removed, a concept referred to as developmental origin of adult disease. This indicates that organisms’ phenotypes may epigenetically reflect their past exposure history as well as reflecting chemicals currently present in their environment. This concept has significant implications for environmental monitoring. However, there is as yet little or no implementation of epigenetics in environmental risk assessment. In a proof-of-principle study we exposed Daphnia magna to 5-azacytidine, a known DNA de-methylating agent. Exposures covered combinations of prenatal and postnatal exposures as well as different exposure durations and recovery stages. Growth, the transcription of genes and levels of metabolites involved in regulating DNA methylation, and methylation levels of several genes were measured. Our data shows that prenatal exposures caused significant changes in the methylome of target genes, indicating that prenatal stages of Daphnia are also susceptible to same level of change as post-natal stages of Daphnia. While the combination of pre- and postnatal exposures caused the most extreme reduction in DNA methylation compared to the control group. Furthermore, some of the changes in the methylation patterns were persistent even after the initial stressor was removed. Our results suggest that epigenetic biomarkers have the potential to be used as indicators of past chemical exposure history of organisms and provide strong support for implementing changes to the current regimes for chemical risk assessment to mimic realistic environmental scenarios.
| Item Type: | Journal Article | ||||||||||||
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| Subjects: | Q Science > QH Natural history > QH426 Genetics | ||||||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School > Biomedical Sciences > Cell & Developmental Biology Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School > Biomedical Sciences Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School |
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| Library of Congress Subject Headings (LCSH): | Epigenetics, Daphnia, Methylation | ||||||||||||
| Journal or Publication Title: | Ecotoxicology | ||||||||||||
| Publisher: | Springer | ||||||||||||
| ISSN: | 0147-6513 | ||||||||||||
| Official Date: | July 2018 | ||||||||||||
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| Volume: | 27 | ||||||||||||
| Number: | 5 | ||||||||||||
| Page Range: | pp. 556-568 | ||||||||||||
| DOI: | 10.1007/s10646-018-1927-3 | ||||||||||||
| Status: | Peer Reviewed | ||||||||||||
| Publication Status: | Published | ||||||||||||
| Access rights to Published version: | Open Access | ||||||||||||
| RIOXX Funder/Project Grant: |
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