Early exposure to ethanol is able to affect the memory of adult zebrafish
| Autor: | Luiza Reali Nazario, Aline Haab Lutte, Rosane Souza da Silva, Julia Huppes Majolo |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Male medicine.medical_specialty Adenosine Memory/drug effects Embryonic Development Ethanol/administration & dosage Toxicology Avoidance Learning/drug effects 03 medical and health sciences 0302 clinical medicine Adenosine deaminase Memory Dopamine Neuromodulation Nucleotidase Internal medicine Memory Disorders/chemically induced Avoidance Learning medicine Animals Zebrafish Embryonic Development/drug effects Memory Disorders Ethanol biology General Neuroscience Glutamate receptor Age Factors biology.organism_classification Adenosine/physiology 030104 developmental biology medicine.anatomical_structure Endocrinology Pharyngula biology.protein Female 030217 neurology & neurosurgery medicine.drug |
| Zdroj: | Neurotoxicology, 69, 17-22. ELSEVIER SCIENCE BV |
| ISSN: | 0161-813X |
| Popis: | Ethanol is one of the most widely consumed drugs in the world, and the effects of ethanol during early development include morphological and cognitive problems. The regulation of adenosine levels is essential for the proper function of major neurotransmitter systems in the brain, particularly glutamate and dopamine; thus, the investigation of the relation of adenosine and memory after early ethanol exposure becomes relevant. Embryos of zebrafish were exposed to 1% ethanol during two distinct developmental stages: gastrula/segmentation or pharyngula. The evaluation of memory, morphology, and locomotor parameters was performed when fish were 3 months old. The effect of ecto-5'-nucleotidase and adenosine deaminase inhibition on the consequences of ethanol exposure with regard to memory formation was observed. Morphological evaluation showed decreases in body length and the relative telencephalic and cerebellar areas in ethanol exposed animals. The locomotor parameters evaluated were not affected by ethanol. In the inhibitory avoidance paradigm, ethanol exposure during the gastrula/segmentation and pharyngula stages decreased zebrafish memory retention. When ethanol was given in the pharyngula stage, the inhibition of ecto-5'-nucleotidase in the acquisition phase of memory tests was able to revert the effects of ethanol on the memory of adults. These findings suggest that the increased adenosine levels caused by ethanol could alter the neuromodulation of important components of memory formation, such as neurotransmitters. The adjustment of adenosine levels through ecto-5'-nucleotidase inhibition appears to be effective at restoring normal adenosine levels and the acquisition of memory in animals exposed to ethanol during the pharyngula stage. |
| Databáze: | OpenAIRE |
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