[R 1881 binding receptor and DHT concentrations in prostatic cytosol]

Area of Science:

• Endocrinology
• Molecular Biology
• Urology

Context:

• Benign prostatic hyperplasia (BPH) is a common condition in aging men.
• Androgen receptor (AR) signaling plays a crucial role in prostate physiology and pathology.
• Understanding AR dynamics in BPH is essential for developing targeted therapies.

Purpose:

• To quantify and compare dihydrotestosterone (DHT) concentrations and R 1881 binding receptor levels in human prostatic tissues from BPH patients and normal controls.
• To characterize the R 1881 binding receptor, including its molecular size and steroid specificity.
• To investigate the correlation between DHT levels and R 1881 receptor binding capacity in the prostate.

Summary:

• Prostatic cytosol from BPH tissues showed significantly higher DHT levels (35.5 pg/mg protein) compared to normal prostates (18.9 pg/mg protein).
• The R 1881 binding receptor concentration (NBS) was also significantly elevated in BPH (30.1 fmol/mg protein) versus normal prostate (10.2 fmol/mg protein).
• The R 1881 receptor was identified as an 8-9S protein, with binding inhibited by androgens and progesterone, and a significant positive correlation was observed between DHT levels and NBS in BPH.

Impact:

• This study provides quantitative evidence of altered androgen receptor dynamics in BPH, suggesting a potential role in disease pathogenesis.
• The findings may inform the development of novel therapeutic strategies targeting AR signaling in BPH.
• Establishes a foundation for further research into the molecular mechanisms underlying BPH progression.