PUBLICATION
Retinoic acid prevents synaptic deficiencies induced by alcohol exposure during gastrulation in zebrafish embryos
- Authors
- Ferdous, J., Mukherjee, R., Ahmed, K.T., Ali, D.W.
- ID
- ZDB-PUB-170608-16
- Date
- 2017
- Source
- Neurotoxicology 62: 100-110 (Journal)
- Registered Authors
- Keywords
- Alcohol, FASD, Mauthner cell, Retinoic acid, Zebrafish
- MeSH Terms
-
- Age Factors
- Animals
- Behavior, Animal/drug effects
- Brain/cytology*
- Brain/drug effects
- Brain/embryology
- Central Nervous System Depressants/toxicity
- Edema/chemically induced
- Embryo, Nonmammalian
- Escape Reaction/drug effects
- Ethanol/toxicity*
- Excitatory Postsynaptic Potentials/drug effects
- Female
- Gastrulation/drug effects*
- Male
- Movement/drug effects
- Neurons/drug effects*
- Neuroprotective Agents/pharmacology*
- Neurotransmitter Agents/pharmacology
- Tretinoin/pharmacology*
- Zebrafish
- alpha-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic Acid/pharmacology
- PubMed
- 28587808 Full text @ Neurotoxicology
Citation
Ferdous, J., Mukherjee, R., Ahmed, K.T., Ali, D.W. (2017) Retinoic acid prevents synaptic deficiencies induced by alcohol exposure during gastrulation in zebrafish embryos. Neurotoxicology. 62:100-110.
Abstract
In this study, we examined the effects of alcohol exposure during gastrulation on zebrafish embryos, specifically focusing on excitatory synaptic activity associated with neurons (Mauthner cells) that are born during gastrulation. Furthermore, we determined whether co-treatment of alcohol and retinoic acid (RA) could prevent the effects of alcohol exposure during gastrulation. We exposed zebrafish embryos to ethanol (150mM), RA (1nM), or a combination of RA (1nM) plus ethanol (150mM) for 5.5hours from 5.25hours post fertilization (hpf) to 10.75 hpf (gastrulation). Ethanol treatment resulted in altered hatching rates, survivability and body lengths. Immunohistochemical analysis of Mauthner cells (M-cells) suggested that ethanol treatment resulted in smaller M-cell bodies and thinner axons, while electrophysiological recordings of AMPA miniature excitatory postsynaptic currents (mEPSCs) associated with M-cells showed that ethanol treated animals had a significantly reduced mEPSC frequency. Other mEPSC parameters such as amplitude, rise times and decay kinetics were not altered by exposure to alcohol. Locomotor studies showed that ethanol treatment resulted in altered C-bend escape responses. For instance, the C-bends of alcohol-treated fish were larger than control embryos. Thus, ethanol treatment during gastrulation altered a range of features in embryonic zebrafish. Importantly, co-treatment with RA prevented all of the effects of ethanol including survivability, body length, M-cell morphology, AMPA mEPSC frequency and escape response movements. Together these findings show that ethanol exposure during the brief period of gastrulation has a significant effect on neuronal morphology and activity, and that this can be prevented with RA co-treatment.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping