Objective: The aim of this study was to investigate whether concomitant treatment of dutasteride and sildenafil could prevent structural changes in the penis of a BPH rodent model. Methods: Thirty-two adult male rats were divided into the following groups: Ctrl, untreated control rats; BPH, untreated spontaneously hypertensive rats (SHRs); BPH + D, SHRs treated with dutasteride; and BPH + DS, SHRs treated with dutasteride and sildenafil. All treatments were performed during 40 days, following which the penises were collected for histomorphometrical analysis. The results were compared via one-way ANOVA with Bonferroni’s post-test, considering p values <.05 as significant. Results: The smooth muscle density decreased by 28.6% and 21.4% in BPH + D and BPH + DS, respectively, when compared to the BPH group. The sinusoid space density reduced by 32.2% in BPH, when compared to the Ctrl group; this density was also reduced by 22.6% in BPH + D, when compared to the BPH group. The density of the elastic fibers increased 51.6% and 65.6% in BPH + D and BPH + DS, when compared to the BPH group. Conclusion: Treatment with dutasteride promoted morphological changes in the corpus cavernous of this BPH model. Concomitant treatment with sildenafil did not prevent the morphological changes caused by dutasteride; on the contrary, it also promoted a further increase in elastic fibers.

The aging male : the official journal of the International Society for the Study of the Aging Male. 2019 Aug 20 [Epub ahead of print]

Marcello H A Da Silva, Jorge L Medeiros, Waldemar S Costa, Francisco J B Sampaio, Diogo B De Souza

Urogenital Research Unit, Rio De Janeiro State University , Rio De Janeiro , Brazil., Fundação Educacional Dom André Arcoverde , Valença , Brazil.