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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Acute toxicity of commercial atrazine in Piaractus mesopotamicus: Histopathological, ultrastructural, molecular, and genotoxic evaluation

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Author(s):
de Paiva, Paula Pereira [1] ; Delcorso, Mariana Cruz [1] ; Matheus, Valquiria Aparecida [1] ; do Nascimento de Queiroz, Sonia Claudia [2] ; Collares-Buzato, Carla Beatriz [1] ; Arana, Sarah [1]
Total Authors: 6
Affiliation:
[1] Univ Campinas UNICAMP, Dept Biochem & Tissue Biol, POB 6109, BR-13083970 Campinas, SP - Brazil
[2] Embrapa Environm, Lab Residues & Contaminants, Jaguariuna, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: VETERINARY WORLD; v. 10, n. 9, p. 1008-1019, SEP 2017.
Web of Science Citations: 6
Abstract

Aim: The aim of this work was to evaluate the sensitivity of Pacu fingerlings (Piaractus mesopotamicus) by measuring the effects of median lethal concentration (LC50) of atrazine (ATZ - 28.58 mg/L)after acute exposure (up to 96 h). Materials and Methods: The fish were exposed to the LC50 of ATZ for 96 h (28.58 mg/L) in a static system. During the experiment, the fingerlings were randomly distributed in four glass tanks (50 L) containing dechlorinated water. Four glass tanks were for the control group, and four were for the ATZ-exposed group (n=4 per glass tank), given a total number of 16 animals tested per group. The genotoxicity was evaluated by micronucleus (MN) test in erythrocytes from peripheral blood. Qualitative and semi-quantitative histopathological analyses, and also ultrastructural study, were applied in liver and kidney samples. Finally, the content of heat shock protein (Hsp70) in the liver was evaluated by the western blotting method. Results: The morphological alterations in the liver, which was associated with increased expression of Hsp70, included nuclear and cytoplasmic vacuolization, cytoplasmic hyaline inclusions, and necrosis. The kidney presented edema and tubular cell degeneration with cytoplasmic hyaline inclusion. The semi-quantitative histopathological analyses indicated that the liver was more sensitive than kidney to ATZ-induced damage. Ultrastructural analysis showed that ATZ caused membrane alterations in several organelles and increased the number of lysosomes in hepatocytes and kidney proximal tubular cells. Nevertheless, no significant difference was observed in MN frequency in erythrocytes comparing treated and control groups. Conclusion: These results indicated that ATZ-induced damage to the kidney and liver function, ATZ at the concentration tested did not induce a significant difference in MN frequency in Pacu erythrocytes comparing treated and control groups, and also that Pacu fingerlings may be a good bioindicator for testing freshwater contamination. (AU)

FAPESP's process: 12/50197-2 - Action of products used in cultivation of sugar cane on non-target organisms
Grantee:Carmem Silvia Fontanetti Christofoletti
Support Opportunities: Program for Research on Bioenergy (BIOEN) - Thematic Grants