Androgen metabolism and the menopause

Area of Science:

• Endocrinology
• Reproductive Biology
• Aging Research

Background:

• Androgen levels exhibit distinct patterns throughout adulthood, with some declining steadily and others decreasing around menopause.
• Understanding the metabolic clearance and age-related changes in androgens is crucial for reproductive health.
• Dehydroepiandrosterone sulfate (DHEAS) has a low metabolic clearance rate due to strong albumin binding, unlike dehydroepiandrosterone (DHEA) and androstenedione (A).

Purpose of the Study:

• To investigate the impact of aging and menopause on androgen concentrations and metabolism.
• To compare the metabolic clearance rates (MCRs) of different androgens.
• To examine changes in androgen aromatization pathways with age.

Main Methods:

• Analysis of blood androgen concentrations at different life stages.
• Calculation and comparison of metabolic clearance rates (MCRs) for DHEAS, DHEA, A, and testosterone (T).
• Assessment of androgen aromatization to estrogens with advancing age.

Main Results:

• DHEA and DHEAS concentrations decline steadily, while androstenedione and testosterone levels decrease around menopause.
• Metabolic clearance rates for DHEAS, DHEA, A, and T are largely unaffected by menopause or age.
• Aromatization of DHEA, A, and T to estrogens significantly increases with age.

Conclusions:

• Androgen metabolism is more profoundly influenced by age than by the menopausal transition itself.
• Increased aromatization with age contributes to altered hormonal balance in older individuals.
• Age-related changes in androgen metabolism warrant further investigation for their clinical implications.