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Environ Anal Health Toxicol > Volume 37:2022 > Article
Environmental Analysis Health and Toxicology 2022;37(3):e2022021-0. doi: https://doi.org/10.5620/eaht.2022021
Evaluation of the toxicological effects of atrazine-metolachlor in male rats: in vivo and in silico studies
Ebenezer Tunde Olayinka1, Ayokanmi Ore1, Kayode Ezekiel Adewole2 , Oyepeju Oyerinde1
1Biochemistry Unit, Department of Chemical Sciences, Ajayi Crowther University Oyo, Oyo State Nigeria
2Department of Biochemistry, Faculty of Basic Medical Sciences, University of Medical Sciences, Ondo, Ondo State, Nigeria
Corresponding Author: Kayode Ezekiel Adewole ,Email: kayowolemi@gmail.com
Received: July 20, 2021;  Accepted: July 25, 2022.
The types and mechanisms of atrazine-metolachlor toxicity, an herbicide composed of atrazine (ATR) and metolachlor (MET), need to be further investigated. This study evaluated the toxic actions of ATR-MET by in vivo and in silico methods. Here, varying doses of ATR-MET were orally administered to rats once daily for twenty-one days using normal saline as control. Molecular docking was used to characterize the binding of ATR and MET with androgen receptor (AR) to predict their potential endocrine-disrupting effects, using testosterone as benchmark. ATR-MET-induced-testicular toxicity (reduced sperm motility, count, and daily sperm production and increased live/dead ratio) was accompanied with testicular oxidative stress (diminished level of reduced glutathione, activities of glutathione-S-transferase, superoxide dismutase and catalase and increased level of malondialdehyde). Furthermore, ATR-MET induced cardiovascular toxicity (increased levels of plasma total cholesterol, HDL-cholesterol, LDL-cholesterol, and triglycerides) with concomitant induction of renal toxicity (increased plasma creatinine and urea levels), and hepatotoxicity (increased plasma bilirubin, alkaline phosphatase, acid phosphatase, alanine aminotransferase and aspartate aminotransferase). Binding energy and amino acid interactions from in silico study revealed that MET possessed endocrine-disrupting capacity. In conclusion, exposure to atrazine-metolachlor could promote cardiovascular, renal, hepatic, as well as reproductive impairment in experimental male albino rats.
Keywords: herbicide, atrazine, metolachlor, cardiotoxicity, testicular toxicity, androgen receptor
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