Effects of dutasteride on sex hormones and cerebrospinal steroids in patients treated for benign prostatic hyperplasia.

PURPOSE: Neuroactive steroids may have a role in regulating sexual function. This case-control study assessed whether dutasteride, a 5α-reductase inhibitor used for treatment of patients with benign prostate hyperplasia (BPH), impacts on the levels of neuroactive steroids, leading to erectile dysfunction (ED) and/or hypoactive sexual desire (HSD). METHODS: Forty patients with BPH and moderate-to-severe lower urinary tract symptoms (LUTS), pre-scheduled for prostate transurethral resection or open prostatectomy were enrolled. Twenty of these patients with prostate volume ≤40 mL were treated with α-blockers (Group A) and the remaining 20, with prostate volume >40 mL, with dutasteride plus α-blockers (Group B) for at least 6 months before surgery. Serum sex steroids and gonadotropin levels were measured the day before surgery, and the neuroactive steroid levels were assessed in the cerebrospinal fluid (CSF) collected during spinal anesthesia, at the day of surgery. RESULTS: Before surgery, the International Index of Erectile Function 5-item score was higher in Group A that Group B (18.8 ± 4.8 vs. 15.1 ± 5.4, p < 0.01). Group A showed lower total testosterone (TT) (4.5 vs.6.4 ng/ml, p < 0.01) and 17ß-estradiol (E2) (24.3 vs.30.7 pg/ml, p < 0.05) serum levels than Group B. CSF levels of TT (1446.6 vs. 19.9 pg/ml, p < 0.05) and dihydrotestosterone (7.9 vs. 1.4 pg/ml, p < 0.05) were higher and CSF E2 levels were lower (26.0 vs.36.0 pg/ml, p < 0.01) in Group A than Group B. CONCLUSIONS: A decrease of neuroactive steroids in the CSF of patients treated with dutasteride occurs. This may be one of the mechanisms by which dutasteride may cause ED and HSD.

"Aquabeam® System" for benign prostatic hyperplasia and LUTS: birth of a new era. A systematic review of functional and sexual outcome and adverse events of the technique.

PURPOSE: Aim of this systematic review is to evaluate functional outcomes (Qmax, QoL, IPSS, PVR), sexual outcome (erectile dysfunction and anejaculation rate), and adverse events evaluated according to the Clavien-Dindo classification. METHODS: The bibliographic search with the included terms (prostate, benign prostatic hyperplasia, benign prostatic enlargement, lower urinary tract symptoms, water jet dissection, aquablation, Aquabeam®) produced a literature of 32 articles altogether. After removing papers of not interest or articles which the outcomes could not be deduced, nine studies were examined for a total of 664 patients screened. RESULTS: The functional outcomes, evaluated after water jet dissection, have shown improvement with respect to the baseline in all the selected articles. In the comparison papers with the TURP, the Aquablation has been statistically not inferior regarding functional outcomes. The sexual outcomes have highlighted a better ejaculation rate for water jet dissection than TURP. Regarding the adverse events, water jet dissection documented low rates of adverse events and, in comparison studies, were not statistically superior than TURP. CONCLUSIONS: In our systematic review, the Aquabeam® System for the treatment of LUTS/BPH has proven to be a safe technique that provides functional outcomes comparable to TURP. About sexual outcomes, the most important data is certainly the low rate of retrograde ejaculation. However, other multicenter randomized trials with larger cohorts and longer follow-up are still needed.