Cholinesterases characterization of three tropical fish species, and their sensitivity towards specific contaminants
| Autor: | Elaine C.M. Silva-Zacarin, André Cordeiro Alves dos Santos, Beatriz V. R. Pereira, Janaina Braga do Carmo, Monica Jones Costa, Bruno Nunes |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Fish Proteins
Male Health Toxicology and Mutagenesis 0211 other engineering and technologies Zoology 02 engineering and technology 010501 environmental sciences Ecotoxicology Carbaryl Pterygoplichthys pardalis 01 natural sciences Acetylcholinesterases Cyprinodontiformes chemistry.chemical_compound Animals Cholinesterases Dimethoate Pesticides Catfishes 0105 earth and related environmental sciences Cholinesterase 021110 strategic defence & security studies biology Muscles Public Health Environmental and Occupational Health Brain Aquatic animal General Medicine Pesticide biology.organism_classification Pollution Acetylcholinesterase Organophosphates Lead chemistry biology.protein Female Carbamates Cholinesterase Inhibitors Copper Water Pollutants Chemical |
| Zdroj: | Ecotoxicology and Environmental Safety. 173:482-493 |
| ISSN: | 0147-6513 |
| DOI: | 10.1016/j.ecoenv.2019.01.105 |
| Popis: | Cholinesterases are frequent targets for toxic effects, namely by insecticides derived from phosphoric and carbamic acids. This effects allows the use of cholinesterase inhibition as a biomarker for contamination of aquatic environments by these specific chemical agents. However, cholinesterases are differently responsive to environmental contaminants, according to their different forms and locations. In addition, cholinesterases seem also to be inhibited by metals, so their use as an environmental criterion requires the prior characterization of their specific forms in each species and tissues, and the study of their sensitivity. The objective of this study was to characterize the cholinesterase isoenzymes present in the brain and dorsal muscle of three tropical fish species, namely Phalloceros harpagos (Lucinda, 2008), Pterygoplichthys pardalis (Castelnau, 1855) and Astyanax altiparanae (Garutti and Britski, 2000). In vitro assays were conducted to quantify the effect of pesticides (dimethoate and carbaryl) and metals (lead and copper) on cholinesterases activity. Although acetylcholinesterase seems to be the most prevalent and abundant form, as commonly described in vertebrates, the here-obtained results showed that three cholinesterase isoenzymes occur in tissues of the three fish species. In addition, the pesticide carbaryl caused a stronger inhibition than dimethoate. Copper caused a significantly higher cholinesterasic inhibition than lead, which is also in line with most results concerning the anticholinesterasic effects by these metals. The here obtained results allowed to conclude that acetylcholinesterase is the predominant form in all tissues from the three analyzed species. In addition, cholinesterases of these three fish were responsive to common environmental contaminants, namely metals and pesticides, similarly to what was already described for fish of temperate areas. This allows using the here proposed fish species in environmental studies for the assessment of the presence of neurotoxicants under neotropical conditions. published |
| Databáze: | OpenAIRE |
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