PUBLICATION
Dopamine Release Impairments Accompany Locomotor and Cognitive Deficiencies in Rotenone-Treated Parkinson's Disease Model Zebrafish
- Authors
- Hettiarachchi, P., Niyangoda, S.S., Jarosova, R., Johnson, M.A.
- ID
- ZDB-PUB-221001-5
- Date
- 2022
- Source
- Chemical Research in Toxicology 35(11): 1974-1982 (Journal)
- Registered Authors
- Keywords
- none
- MeSH Terms
-
- Animals
- Cognition
- Disease Models, Animal
- Dopamine/metabolism
- Parkinson Disease*
- Rotenone*/pharmacology
- Zebrafish/metabolism
- PubMed
- 36178476 Full text @ Chem. Res. Toxicol.
Citation
Hettiarachchi, P., Niyangoda, S.S., Jarosova, R., Johnson, M.A. (2022) Dopamine Release Impairments Accompany Locomotor and Cognitive Deficiencies in Rotenone-Treated Parkinson's Disease Model Zebrafish. Chemical Research in Toxicology. 35(11):1974-1982.
Abstract
In this work, we carried out neurochemical and behavioral analysis of zebrafish (Danio rerio) treated with rotenone, an agent used to chemically induce a syndrome resembling Parkinson's disease (PD). Dopamine release, measured with fast-scan cyclic voltammetry (FSCV) at carbon-fiber electrodes in acutely harvested whole brains, was about 30% of that found in controls. Uptake, represented by the first order rate constant (k) and the half-life (t1/2) determined by nonlinear regression modeling of the stimulated release plots, was also diminished. Behavioral analysis revealed that rotenone treatment increased the time required for zebrafish to reach a reward within a maze by more than 50% and caused fish to select the wrong pathway, suggesting that latent learning was impaired. Additionally, zebrafish treated with rotenone suffered from diminished locomotor activity, swimming shorter distances with lower mean velocity and acceleration. Thus, the neurochemical and behavioral approaches, as applied, were able to resolve rotenone-induced differences in key parameters. This approach may be effective for screening therapies in this and other models of neurodegeneration.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping