Related Experiment Videos
Androgens and osteocalcin during the menstrual cycle.
C Massafra1, C De Felice, D P Agnusdei
1Department of Obstetrics and Gynecology, University of Siena, Italy. massafra@unisi.it
The Journal of Clinical Endocrinology and Metabolism
|March 20, 1999
Summary
This study reveals a link between androgens and osteocalcin (OC) levels in women during their menstrual cycle. Androgens appear to play a role in regulating OC secretion and bone health.
Area of Science:
- Endocrinology
- Bone Metabolism
- Reproductive Physiology
Background:
- The menstrual cycle involves dynamic hormonal fluctuations.
- The interplay between sex hormones and bone metabolism is complex.
- Calciotropic hormones regulate calcium homeostasis and bone health.
Purpose of the Study:
- To investigate the relationship between female sex and androgenic hormones and calciotropic hormones during the menstrual cycle.
- To explore the potential role of androgens in regulating bone metabolism markers.
- To assess hormonal profiles and their variations throughout the menstrual cycle in healthy women.
Main Methods:
- Longitudinal study of 12 healthy eumenorrhoic women (age 20-29).
- Hormone levels (estradiol, progesterone, testosterone, androstenedione, PTH, calcitonin) and ionized calcium measured throughout the menstrual cycle.
- Cycle length standardized to the preovulatory estradiol peak (day 0).
Main Results:
- No significant cycle phase-dependent changes were observed in calciotropic hormones.
- Significant positive correlations found between total testosterone, free testosterone, androstenedione, and osteocalcin (OC) serum levels.
- Time series analysis confirmed the significant relationships between androgens and OC.
Conclusions:
- Endogenous androgens are related to osteocalcin serum levels during the menstrual cycle.
- Androgens may play a regulatory role in osteocalcin secretion.
- This suggests a role for androgens in bone formation and maintenance of bone mineral content in healthy women.