Effect of Late Androgen Replacement Therapy on Erectile Function Through Structural Changes in Castrated Rats

Area of Science:

• Urology
• Andrology
• Reproductive Medicine

Background:

• Androgen replacement therapy (ART) is often delayed after androgen deficiency onset.
• Late ART initiation may impact treatment efficacy and outcomes.

Purpose of the Study:

• To evaluate the effects of late ART on erectile function.
• To assess structural changes in the corpus cavernosum following delayed androgen therapy.

Main Methods:

• Rats underwent castration followed by ART initiated 4 weeks later for 4 or 8 weeks.
• Erectile function was measured via intracavernosal pressure (ICP) and mean arterial pressure (MAP).
• Corpus cavernosum histology was analyzed using Masson's trichrome staining.

Main Results:

• Late ART for 8 weeks significantly increased the ICP/MAP ratio and improved the smooth muscle/collagen ratio compared to 4 weeks of treatment.
• No significant ICP increase was observed with 4 weeks of late ART.
• Histological analysis revealed structural improvements in the corpus cavernosum with longer treatment duration.

Conclusions:

• Late ART can improve erectile function and corpus cavernosum structure.
• Significant benefits require a prolonged treatment period, emphasizing the need for patient persistence.
• Findings suggest that delayed androgen therapy can be effective but necessitates patience for optimal outcomes.