Chlorothalonil inhibits mouse ovarian development through endocrine disruption

Area of Science:

• Environmental Toxicology
• Reproductive Biology
• Developmental Toxicology

Background:

• Chlorothalonil is a widely used fungicide in agriculture.
• Previous studies focused on general toxicity and reproductive effects, with limited research on ovarian development.
• Puberty represents a critical period for female reproductive system maturation.

Purpose of the Study:

• To investigate the effects of low-dose chlorothalonil on peripubertal mouse ovarian development.
• To elucidate the underlying mechanisms of chlorothalonil's impact on the ovary.
• To assess potential risks to female reproductive health from dietary chlorothalonil exposure.

Main Methods:

• Exposure of peripubertal mice to low doses of chlorothalonil.
• Assessment of ovarian development, including follicle counts (primary and mature).
• Analysis of hormone receptor protein levels (FSH receptor, estrogen receptor alpha), DNA repair markers (RAD51), and apoptosis.

Main Results:

• Chlorothalonil significantly inhibited ovarian development during puberty.
• Exposure led to an increased number of primary follicles and a decreased number of mature follicles.
• Mechanisms involved decreased FSH receptor and estrogen receptor alpha, increased RAD51, and elevated apoptosis.

Conclusions:

• Low-dose chlorothalonil disrupts endocrine function and inhibits ovarian development in peripubertal mice.
• The findings suggest a potential health risk to female reproductive systems, particularly the ovary.
• Chlorothalonil contamination from fruits and vegetables may pose a risk to human female reproductive health.