Abstract
Atrazine (ATZ) exposure is associated with reproductive dysfunction in both animals and humans. Myricetin, a flavonoid compound, is well documented for its numerous pharmacological activities. However, the impact of myricetin on the atrazine-mediated dysfunctional hypothalamic-pituitary–testicular axis is not known. This study investigated the role of myricetin on the atrazine-induced alterations in the male reproductive axis in rats orally gavaged with ATZ alone (50 mg/kg) or co-treated with ATZ + myricetin (MYR) at 5, 10, and 20 mg/kg for 30 consecutive days. Myricetin assuaged ATZ-induced reductions in intra-testicular testosterone, serum follicle-stimulating hormone, luteinizing hormone, and testosterone, coupled with decreases in alkaline phosphatase, acid phosphatase, lactate dehydrogenase, and glucose-6-phosphate dehydrogenase activities. Also, MYR treatment improved epididymal sperm count and motility and decreased sperm defects in ATZ-treated rats. Testicular sperm number, daily sperm production, and sperm viability remained unchanged in all treatment groups. Administration of MYR abated ATZ-mediated depletion in antioxidant status, an increase in myeloperoxidase activity, nitric oxide, hydrogen peroxide, malondialdehyde levels, and reactive oxygen and nitrogen species, as well as the histological lesions in the hypothalamus, epididymis, and testes of treated animals. All in all, MYR mitigated atrazine-mediated functional changes in the reproductive axis via anti-inflammatory and antioxidant mechanisms in atrazine-exposed rats. Dietary intake of MYR could be a worthy chemoprotective approach against reproductive dysfunction related to ATZ exposure.
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The original data and materials of the current study are available with the corresponding author and will be made available on justifiable request.
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The original data and materials of the current study are available with the corresponding author and will be made available on justifiable request.
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Cynthia N. Ikeji: conceptualization; methodology; data curation; writing—original draft preparation. Isaac A. Adedara: supervision; validation; writing—review and editing. Ebenezer O. Farombi: cconceptualization; validation; writing—review and editing.
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Ikeji, C.N., Adedara, I.A. & Farombi, E.O. Dietary myricetin assuages atrazine-mediated hypothalamic-pituitary–testicular axis dysfunction in rats. Environ Sci Pollut Res 30, 15655–15670 (2023). https://doi.org/10.1007/s11356-022-23033-5
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DOI: https://doi.org/10.1007/s11356-022-23033-5