PUBLICATION
Behavioural response to toxic elements, detoxification and organ accumulation are time-of-day-dependent in zebrafish
- Authors
- Guidi, C., Martínez-López, E., Oliver, J.A., Sánchez-Vázquez, F.J., Vera, L.M.
- ID
- ZDB-PUB-230116-2
- Date
- 2023
- Source
- Chemosphere 316: 137862 (Journal)
- Registered Authors
- Keywords
- Antioxidant response, Arsenic, Daily rhythm, Locomotor activity, Mercury, Zebrafish
- MeSH Terms
-
- Zebrafish/metabolism
- Mercuric Chloride/toxicity
- Mercury*/metabolism
- Water Pollutants, Chemical*/metabolism
- Water Pollutants, Chemical*/toxicity
- Antioxidants/metabolism
- Animals
- Swimming
- PubMed
- 36642134 Full text @ Chemosphere
Citation
Guidi, C., Martínez-López, E., Oliver, J.A., Sánchez-Vázquez, F.J., Vera, L.M. (2023) Behavioural response to toxic elements, detoxification and organ accumulation are time-of-day-dependent in zebrafish. Chemosphere. 316:137862.
Abstract
Toxic elements, such as mercury (Hg) and arsenic (As), are major pollutants in aquatic environments, posing ecological threats to living organisms due to their toxicity and bioaccumulation. This paper investigated whether zebrafish response to Hg and As displayed day/night differences. Fish were exposed to either 35 μg/L of mercury chloride for 6 h or 65 mg/L of sodium arsenate for 4 h, at two different times of the day: mid-light (day; ML) and mid-darkness (night; MD). Fish were video-recorded to investigate their behavioural response and at the end of each trial, gills and liver samples were collected for gene expression measurement. Gills, liver and brain samples were also obtained to determine Hg and As concentration. A control group (non-exposed) was video-recorded and sampled too. The effect of Hg and As on zebrafish swimming activity and the expression of antioxidant and metallothionein genes was time-of-day-dependent, with a stronger response being observed during the day than at night. However, the neurobehavioural effect of Hg was more affected by the time of exposure than the effect of As. In addition, Hg concentration in the gills was significantly higher in zebrafish exposed at ML than at MD. Altogether, these findings suggest that zebrafish response to Hg and As is time-of-day-dependent and remark the importance of considering toxicity rhythms when using this fish species as a model in toxicological research.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping