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This study aimed to investigate the toxicity mechanism of beta-cypermethrin (beta-CYP) on fertility in female mice. Eighty female mice were randomly assigned to four groups of 20 mice each: one control group and three beta-CYP-treated groups. The control group was administered corn oil only, while the three beta-CYP-treated groups were given corn oil containing 1.38, 2.76, and 5.52 mg/kg bw.d beta-CYP for 180 days through intragastric administration. The results found that the 2.76 and 5.52 mg/kg bw.d beta-CYP significantly decreased the rate of successful pregnancy (p < 0.05). The concentrations of biomarkers related to oxidative stress were significantly elevated, while the concentrations of the endogenic enzymatic antioxidants were significantly decreased by the beta-CYP exposure (all p < 0.05). The expression levels of inflammatory-related molecules and the DNA-protein crosslink coefficient in mice uteri were significantly increased after beta-CYP exposure (all p < 0.05). The concentration of 8-hydroxy-2-deoxyguanosine was significantly increased in the 5.52 mg/kg bw.d beta-CYP group (p < 0.05). These results suggested that beta-CYP exposure significantly decreased female reproduction by enhancing oxidative stress in uterine tissue, which led to the increased inflammatory response and oxidative DNA damage in uterine tissue.
This article was published in the following journal.
Name: Regulatory toxicology and pharmacology : RTP
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