Hugo H Davila

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Aging-related erectile dysfunction is characterized by a loss of smooth muscle cells (SMCs) and fibrosis in the corpora cavernosa, and functionally by corporal veno-occlusive dysfunction (CVOD). Phosphodiesterase 5 (PDE5A) inhibitors, in part via upregulating inducible nitric oxide synthase (NOS2A), have antifibrotic properties in penile tissues. We aimed(More)
OBJECTIVES Impotence, specifically corporal veno-occlusive dysfunction (CVOD), occurs after radical prostatectomy. It results from the effects of cavernosal nerve damage, which causes smooth muscle (SM) loss and an increase in collagen within the corpora. Recent reports have suggested that long-term treatment with phosphodiesterase-5 inhibitors after(More)
The goal of the present study was to investigate the antifibrotic role of inducible nitric oxide synthase (iNOS) in Peyronie's disease (PD) by determining whether a plasmid expressing iNOS (piNOS) injected into a PD-like plaque can induce regression of the plaque. A PD-like plaque was induced with fibrin in the penile tunica albuginea of mice and then(More)
OBJECTIVE Aging associated erectile dysfunction (ED) is primarily caused by the reduction in smooth muscle cells (SMC) and an increase in collagen within the corpora cavernosa, assumed to result from an increase in reactive oxygen species (ROS). This is accompanied by the expression of inducible nitric oxide synthase (iNOS) to produce nitric oxide that(More)
OBJECTIVE To evaluate whether fluorescent tracers can consistently label the neurovascular bundles (NVBs) and major pelvic ganglion (MPG) after an intracavernosal penile injection, as the reported incidence of erectile dysfunction (ED) in men after radical prostatectomy (RP) is 55-65% and thus preservation of erectile function, sparing one or both of the(More)
OBJECTIVE To review the long-term results in patients treated with either total or partial prostate-sparing cystectomy, focusing on erectile function (EF), as en-bloc radical cystectomy (RC) with or without urethrectomy has been the method of choice for managing invasive bladder carcinoma, but has inherent risks of subsequent urinary incontinence and(More)
BACKGROUND Compromised sexual function is often a side effect for patients following radical surgical procedures for bladder or prostate cancer. METHODS The authors review the classification and physiology of sexual function and dysfunction. Moreover, they explain the possible pathophysiology directly resulting from surgery, and they discuss several(More)
OBJECTIVES To investigate the role of fibrin in inducing fibrosis in the tunica albuginea (TA) of the rat penis, to develop a new animal model for Peyronie's disease (PD). MATERIALS AND METHODS The TA of rats (five per group per period) were injected with either saline, fibrin, transforming growth factor-beta1 (TGF-beta1) or TGF-beta1 plus fibrin; the(More)
INTRODUCTION Over-expression of penile neuronal nitric oxide synthase (PnNOS) from a plasmid ameliorates aging-related erectile dysfunction (ED), whereas over-expression of the protein inhibitor of NOS (PIN), that binds to nNOS, increases ED. AIM To improve this form of gene therapy for ED by comparing the electrical field response of short hairpin RNA(More)
OBJECTIVES To determine whether the rat develops corporal veno-occlusive dysfunction (CVOD) during the aging process. METHODS We divided male Fisher 344 rats into four groups with 5 to 8 rats in each group. Group 1 rats were 5 months old and not orchiectomized (young intact); group 2 were 5 months old and had undergone castration (control CVOD); group 3(More)