Evaluation of oxidative stress responses and primary DNA damage in blood and brain of rats exposed to low levels of tembotrione.
Antioxidant enzymes
Comet assay
Lipid peroxidation
Tembotrione
Journal
Chemosphere
ISSN: 1879-1298
Titre abrégé: Chemosphere
Pays: England
ID NLM: 0320657
Informations de publication
Date de publication:
Aug 2020
Aug 2020
Historique:
received:
24
01
2020
revised:
24
03
2020
accepted:
27
03
2020
pubmed:
12
4
2020
medline:
25
6
2020
entrez:
12
4
2020
Statut:
ppublish
Résumé
Tembotrione is a rather novel pesticide, usually used for post-emergence weed control. Even though its use is rapidly growing, it is not followed by an adequate flow of scientific evidence regarding its toxicity towards non-target organisms. We evaluated the potential of low doses of tembotrione to induce oxidative stress and cytogenetic damage in blood and brain cells of adult male Wistar rats. Parameters of lipid peroxidation, glutathione levels, activities of antioxidant enzymes and primary DNA damage were assessed following 28-day repeated oral exposure to doses comparable with the currently proposed health-based reference values. The results of the alkaline comet assay showed that such low doses of tembotrione have the potency to inflict primary DNA damage in both peripheral blood leukocytes and brain of treated rats, even with only slight changes in the oxidative biomarker levels. The DNA damage in blood and brain cells of Wistar rats significantly increased at all applied doses, suggesting that tembotrione genotoxicity is mainly a result of direct interaction with DNA while the induction of oxidative stress responses contributes to DNA instability in a lesser extent. The findings of the present study call for further research using other sensitive biomarkers of effect and different exposure scenarios.
Identifiants
pubmed: 32278190
pii: S0045-6535(20)30836-5
doi: 10.1016/j.chemosphere.2020.126643
pii:
doi:
Substances chimiques
Antioxidants
0
Cyclohexanones
0
Herbicides
0
Sulfones
0
Glutathione
GAN16C9B8O
tembotrione
WA5UZ202KS
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
126643Informations de copyright
Copyright © 2020 Elsevier Ltd. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of competing interest None to declare.