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Published on: December 14, 2014
Prenatal hyperandrogenic environment induced autistic-like behavior in rat offspring
Xin-Jie Xu1, Hong-Feng Zhang1, Xiao-Jing Shou1
1Neuroscience Research Institute, Peking University, Beijing, PR China; Department of Neurobiology, School of Basic Medical Sciences, Peking University, Beijing, PR China; Key Laboratory for Neuroscience, Ministry of Education/National Health and Family Planning Commission, Peking University, Beijing, PR China.
Maternal hyperandrogenism during pregnancy may increase Autism Spectrum Disorder (ASD) risk. Prenatal exposure to a high-androgen environment induced autistic-like behaviors in female rats, suggesting a potential risk factor.
Area of Science:
- Neuroscience
- Developmental Biology
- Endocrinology
Background:
- Autism Spectrum Disorder (ASD) is a neurodevelopmental disorder impacting social communication.
- Environmental factors, particularly the intrauterine environment, are implicated in ASD development.
- Maternal hyperandrogenism is hypothesized to increase fetal susceptibility to ASD.
Purpose of the Study:
- To investigate the effects of a hyperandrogenic intrauterine environment on neurodevelopment and behavior in rat offspring.
- To determine if prenatal exposure to elevated androgens induces autistic-like behaviors.
Main Methods:
- Pregnant rats were administered letrozole to create a hyperandrogenic intrauterine environment.
- Offspring behavior was assessed, including ultrasonic vocalizations, social interaction, and heterosexual interaction.
- Maternal serum testosterone levels were correlated with offspring behavior.
Main Results:
- Rat pups exposed prenatally to hyperandrogenism emitted fewer ultrasonic vocalizations when isolated.
- Female offspring exhibited reduced social interaction in adolescence and impaired heterosexual interaction in adulthood.
- Social and heterosexual interaction durations were negatively correlated with maternal testosterone levels.
Conclusions:
- Prenatal exposure to a hyperandrogenic environment can induce autistic-like behaviors in female rats.
- Maternal hyperandrogenism during pregnancy is a potential risk factor for ASD etiology.
- This study highlights the role of the prenatal hormonal environment in neurodevelopmental disorders.
