How short-term transdermal treatment of men with 7-oxo-dehydroepiandrosterone influence thyroid function

Area of Science:

• Endocrinology
• Metabolic Research
• Steroid Biochemistry

Background:

• Dehydroepiandrosterone (DHEA) metabolites can influence thyroid function.
• 7-Oxo-dehydroepiandrosterone (7-oxo-DHEA) is a DHEA metabolite with potential therapeutic applications.
• Investigating the impact of 7-oxo-DHEA on thyroid parameters is crucial for understanding its physiological effects.

Purpose of the Study:

• To determine if transdermal application of 7-oxo-DHEA affects laboratory parameters of thyroid function.
• To assess the short-term and long-term effects of 7-oxo-DHEA on thyroid hormones and related steroids.
• To evaluate the persistence of 7-oxo-DHEA metabolites after cessation of treatment.

Main Methods:

• Twenty-one healthy men received transdermal 7-oxo-DHEA (25 mg/day) for 8 consecutive days.
• Blood samples were collected at multiple time points before, during, and after treatment.
• Levels of thyrotropin (TSH), free thyroxine (FT4), triiodothyronine (T3), DHEA, DHEA sulfate, and 7-hydroxy-DHEA epimers were measured.

Main Results:

• A significant increase in 7beta-hydroxy-dehydroepiandrosterone was observed during treatment, persisting for one week post-treatment.
• Thyrotropin (TSH), free thyroxine (FT4), and triiodothyronine (T3) showed slight, transient increases during treatment, returning to baseline.
• No significant changes were noted in dehydroepiandrosterone (DHEA) or dehydroepiandrosterone sulfate (DHEA-S) levels.

Conclusions:

• Transdermal 7-oxo-DHEA treatment has only temporary effects on thyroid function parameters.
• The study confirms a persistent increase in 7beta-hydroxy-dehydroepiandrosterone following 7-oxo-DHEA administration.
• 7-oxo-DHEA may be a viable candidate for steroid replacement therapy with limited impact on thyroid homeostasis.