Toxicity of silver nanoparticles on different tissues in adult Danio rerio

Autor: Josealdo Tonholo, M V F Matias, E K M Toledo, Elton Lima Santos, S Smaniotto, Carmem Lúcia de Paiva e Silva Zanta, Sonia Salgueiro Machado, A Ximenes-da-Silva, C S Marinho
Rok vydání: 2021
Předmět:
Zdroj: Fish Physiology and Biochemistry. 47:239-249
ISSN: 1573-5168
0920-1742
DOI: 10.1007/s10695-020-00909-2
Popis: Although silver nanoparticles (AgNP) are among the most studied nanomaterials by virtue of their broad application in many areas, little is known about their overall toxicity to aquatic organisms after their contamination of the water environment. This study aimed to analyze the effect of the exposure (96 h) to different AgNP concentrations on Danio rerio (zebrafish) tissues. AgNP were synthesized and characterized by transmission electron microscopy (TEM), showing spherical AgNP of 30.00 ± 16.80 nm size. The effects of different AgNP concentrations (1, 3, and 5 μg L-1) on brain, muscle, gill, and liver tissues of zebrafish were investigated. The results show a significant decrease in brain and muscle acetylcholinesterase (AChE) activity. Liver and gill catalase (CAT) activity also decreased significantly. At the highest exposure concentration, muscle AChE was more inhibited (37.3%) than brain AChE (26.4%) and gill CAT was more inhibited (67.4%) than liver CAT (51.2%). D. rerio also showed gill morphological changes such as fusion of secondary lamellae, curvature, dilated marginal channel, and epithelial lifting. This study indicates that gill CAT together with morphological studies are potential biomarkers for AgNP.
Databáze: OpenAIRE
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