Intraprostatic hormone dosage: Validation of a novel prostate biopsy technique

Area of Science:

• Urology
• Endocrinology
• Oncology

Background:

• Novel technique for direct intraprostatic hormone measurement on prostate needle biopsies.
• Advances in chromatography and mass spectrometry enable this new method.
• Potential clinical implications for monitoring prostate growth, neoplasia, and castration resistance.

Purpose of the Study:

• To evaluate a novel technique for measuring intraprostatic hormone concentrations using prostate needle biopsies.
• To compare hormone levels obtained from needle biopsies with traditional punch excisions.
• To assess the feasibility of using needle biopsies for direct hormone measurement in prostate cancer research.

Main Methods:

• Prospective inclusion of patients undergoing radical cystoprostatectomy.
• Collection of one 90mg punch excision and six needle biopsies per prostate specimen.
• Quantification of intraprostatic hormones using gas chromatography-mass spectrometry.

Main Results:

• Tissue concentrations of DHEA, DHT, E1, and E2 were successfully measured from single biopsy cores.
• No significant difference was found between hormone levels from needle biopsies and punch excisions for DHEA, DHT, E1, and E2.
• The technique was unable to measure testosterone, Delta-4-androsterone, and androstenedione.

Conclusions:

• Intraprostatic DHEA, DHT, E1, and E2 concentrations can be reliably measured using a single prostate needle biopsy core.
• This method provides a viable alternative to traditional punch excisions for hormone analysis.
• Findings support further research into endocrinology, prostate oncogenesis, and in vivo mechanisms of hormone therapy resistance.