Related Experiment Videos
Anti-androgen induced inhibition of testicular descent is associated with a decrease in sympathetic tonus
F C Tanyel1, M Ertunç, S Ekinci
1Department of Paediatric Surgery, Hacettepe University, Faculty of Medicine, Ankara, Turkey. ctanyel@hacettepe.edu.tr
Summary
Exposure to non-steroidal anti-androgens during development alters cremaster muscle function, suggesting a role for sympathetic tone in androgen-mediated testicular descent. This study supports the link between sympathetic pathways and the process of testes descent.
Area of Science:
- Endocrinology
- Developmental Biology
- Physiology
Background:
- Undescended testes in humans are associated with altered sympathetic and parasympathetic muscle tone.
- Sympathetic tone is androgen-dependent, suggesting androgens may influence testicular descent via this pathway.
Purpose of the Study:
- To investigate the contractile responses of cremaster muscles in rats exposed to intrauterine anti-androgens.
- To evaluate the role of sympathetic tonus in androgen-controlled testicular descent.
Main Methods:
- Pregnant rats were administered saline, flutamide, or cyproterone acetate.
- Cremaster muscle contractile properties were assessed in offspring at 12 weeks of age.
- Responses to verapamil and isoprenaline were measured to evaluate sympathetic and calcium channel activity.
Main Results:
- Flutamide exposure resulted in undescended testes in 60% of offspring.
- Cremaster muscles from flutamide-exposed rats showed reduced sensitivity to verapamil and increased contractile response to isoprenaline.
- Alterations in muscle contractile properties were not dependent on testes localization in the flutamide group.
Conclusions:
- Non-steroidal anti-androgen exposure leads to decreased sympathetic tonus in cremaster muscles.
- These findings provide experimental evidence supporting the involvement of sympathetic tonus in androgen-driven testicular descent.