The GnRH Antagonist Degarelix Directly Inhibits Benign Prostate Hyperplasia Cell Growth

TL;DRAbstract

Gonadotropin-releasing hormone receptors (GnRHR) have been found in extrapituitary tissues, including the prostate, where they might exert a local effect on tissue growth. Degarelix is a GnRHR antagonist approved for use in patients with prostate cancer (PCa) who need androgen deprivation therapy. The slowing of prostate cell growth is a common goal shared by PCa and benign prostate hyperplasia (BPH) patients, and the effect of degarelix on BPH cells has not yet been investigated. We wanted to evaluate the direct effect of degarelix on human BPH primary cell growth. Gene expression studies performed with BPH (n=11), stage 0 (n=15), and PCa (n=65) human specimens demonstrated the presence of GNRHR1 and GNRHR2 and their respective endogenous peptide ligands. BPH-isolated epithelial and stromal cells were either cultured alone or co-cultured (1:4 or 4:1 ratio of epithelial to stromal cells) and subsequently treated with increasing concentrations of degarelix. Degarelix treatment induced a

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