PUBLICATION
Potential of the zebrafish (Danio rerio) embryo test to discriminate between chemicals of similar molecular structure-a study with valproic acid and 14 of its analogues
- Authors
- Brotzmann, K., Escher, S.E., Walker, P., Braunbeck, T.
- ID
- ZDB-PUB-220804-1
- Date
- 2022
- Source
- Archives of toxicology 96(11): 3033-3051 (Journal)
- Registered Authors
- Braunbeck, Thomas
- Keywords
- Discrimination of analogues, Liver toxicity, Structure–activity relationship (SAR), Valproic acid, Zebrafish embryos
- MeSH Terms
-
- Animals
- Anticonvulsants/toxicity
- Child
- Embryo, Nonmammalian
- Humans
- Mammals
- Mice
- Molecular Structure
- Pharmaceutical Preparations/metabolism
- Rats
- Reproducibility of Results
- Toxicity Tests, Acute/methods
- Valproic Acid/toxicity
- Water Pollutants, Chemical*/metabolism
- Zebrafish*
- PubMed
- 35920856 Full text @ Arch. Toxicol.
Citation
Brotzmann, K., Escher, S.E., Walker, P., Braunbeck, T. (2022) Potential of the zebrafish (Danio rerio) embryo test to discriminate between chemicals of similar molecular structure-a study with valproic acid and 14 of its analogues. Archives of toxicology. 96(11):3033-3051.
Abstract
Valproic acid is a frequently used antiepileptic drug and known pediatric hepatotoxic agent. In search of pharmaceuticals with increased effectiveness and reduced toxicity, analogue chemicals came into focus. So far, toxicity and teratogenicity data of drugs and metabolites have usually been collected from mammalian model systems such as mice and rats. However, in an attempt to reduce mammalian testing while maintaining the reliability of toxicity testing of new industrial chemicals and drugs, alternative test methods are being developed. To this end, the potential of the zebrafish (Danio rerio) embryo to discriminate between valproic acid and 14 analogues was investigated by exposing zebrafish embryos for 120 h post fertilization in the extended version of the fish embryo acute toxicity test (FET; OECD TG 236), and analyzing liver histology to evaluate the correlation of liver effects and the molecular structure of each compound. Although histological evaluation of zebrafish liver did not identify steatosis as the prominent adverse effect typical in human and mice, the structure-activity relationship (SAR) derived was comparable not only to human HepG2 cells, but also to available in vivo mouse and rat data. Thus, there is evidence that zebrafish embryos might serve as a tool to bridge the gap between subcellular, cell-based systems and vertebrate models.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping