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Ko K, Lee WK, Cho ST, Lee YG, Shin TY, Choo MS, Han JH, Lee SH, Oh CY, Cho JS, Jeong HC, Yang DY. Effect of udenafil administration on postmicturition dribbling in men: a prospective, multicenter, double-blind, placebo-controlled, randomized clinical study. Aging Male 2020; 23:571-578. [PMID: 30651036 DOI: 10.1080/13685538.2018.1545834] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
PURPOSE Postmicturition dribbling (PMD) is a stressful symptom in middle-aged men characterized by urinary leakage after the completion of normal voiding. Appropriate treatments have not yet been introduced. This study assessed the efficacy of treatment of PMD with 75 mg udenafil daily. MATERIALS AND METHODS The study included 138 men with regular sexual lifestyles. The Hallym PMD questionnaire (HPMDQ) was used to assess PMD symptoms. After all basic examinations, patients were randomly assigned to either udenafil or placebo. Patients completed the surveys, uroflowmetry (UFM), a bladder scan, and the paper test during the follow-up visit. RESULTS The mean age of the patients was 57.6 years. PMD with one of every three urinations was experienced by 59 patients (42.8%), whereas 45 patients (32.6%) experienced PMD with two of every three urinations. PMD with every urination was experienced by 34 patients (24.6%). More than half of the patients (89 patients, 65.4%) indicated that persistent PMD symptoms would likely result in moderate to severe discomfort in their daily activities. As time passed, the udenafil group showed significant improvement in PMD symptoms (p = 0.001). CONCLUSION Udenafil 75 mg once daily can be an effective treatment for patients with PMD symptoms.
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Affiliation(s)
- Kyungtae Ko
- Department of Urology, Hallym University Kangdong Sacred Heart Hospital, Seoul, Korea
| | - Won Ki Lee
- Department of Urology, Hallym University Chuncheon Sacred Heart Hospital, Chuncheon, Korea
| | - Sung Tae Cho
- Department of Urology, Hallym University Kangnam Sacred Heart Hospital, Seoul, Korea
| | - Young Gu Lee
- Department of Urology, Hallym University Kangnam Sacred Heart Hospital, Seoul, Korea
| | - Tae Young Shin
- Department of Urology, Hallym University Chuncheon Sacred Heart Hospital, Chuncheon, Korea
| | - Min Soo Choo
- Department of Urology, Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Korea
| | - Jun Hyun Han
- Department of Urology, Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Korea
| | - Seong Ho Lee
- Department of Urology, Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Korea
| | - Cheol Young Oh
- Department of Urology, Hallym University Hallym Sacred Heart Hospital, Gyeonggi, Korea
| | - Jin Seon Cho
- Department of Urology, Hallym University Hallym Sacred Heart Hospital, Gyeonggi, Korea
| | - Hyun Cheol Jeong
- Department of Urology, Hallym University Kangdong Sacred Heart Hospital, Seoul, Korea
| | - Dae Yul Yang
- Department of Urology, Hallym University Kangdong Sacred Heart Hospital, Seoul, Korea
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Epifanova MV, Gvasalia BR, Durashov MA, Artemenko SA. Platelet-Rich Plasma Therapy for Male Sexual Dysfunction: Myth or Reality? Sex Med Rev 2020; 8:106-113. [DOI: 10.1016/j.sxmr.2019.02.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 01/29/2019] [Accepted: 02/04/2019] [Indexed: 01/01/2023]
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Cho MC, Song WH, Paick JS. Suppression of Cavernosal Fibrosis in a Rat Model. Sex Med Rev 2018; 6:572-582. [DOI: 10.1016/j.sxmr.2018.02.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 02/26/2018] [Accepted: 02/27/2018] [Indexed: 12/26/2022]
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Muniz JJ, Leite LN, Lacchini R, Tanus-Santos JE, Tirapelli CR. Dysregulated mitogen-activated protein kinase and matrix metalloproteinase in ethanol-induced cavernosal dysfunction. Can J Physiol Pharmacol 2017; 96:266-274. [PMID: 28820947 DOI: 10.1139/cjpp-2017-0082] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
We evaluated the effects of ethanol consumption on the mitogen-activated protein kinases (MAPK) and metalloproteinases (MMP) pathways in the rat cavernosal smooth muscle (CSM). Male Wistar rats were treated with ethanol (20% v/v) for 6 weeks. Quantitative real-time polymerase chain reaction experiments showed that ethanol consumption did not alter mRNA levels of p38MAPK, SAPK/JNK, ERK1/2, MMP-2, or MMP-9 in the rat CSM. Western immunoblotting experiments revealed decreased protein expression of p38MAPK and phosphorylation of SAPK/JNK in the CSM from ethanol-treated rats. Additionally, ethanol consumption decreased the expression of MMP-2. Functional assays showed that SP600125, an inhibitor of SAPK/JNK, prevented the increase in endothelin (ET)-1-induced contraction in the CSM from ethanol-treated rats. Treatment with ethanol decreased MMP-2 activity, but did not change net MMP activity in the rat CSM. Ethanol consumption increased the circulating levels of MMP-2, MMP-9, and TIMP-2 as well as the MMP-9/TIMP-1 ratio. The major finding of our study is that ethanol consumption down-regulates both MAPK and MMP pathways in the rat CSM, whereas it increases the circulating levels of MMP-9. Additionally, we found that SAPK/JNK plays a role in ethanol-induced increase on ET-1 contraction in the isolated rat CSM.
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Affiliation(s)
- Jaqueline J Muniz
- a Escola de Enfermagem de Ribeirão Preto, DEPCH, Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Letícia N Leite
- a Escola de Enfermagem de Ribeirão Preto, DEPCH, Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil.,b Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto, USP, Ribeirão Preto, SP, Brazil
| | - Riccardo Lacchini
- a Escola de Enfermagem de Ribeirão Preto, DEPCH, Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - José E Tanus-Santos
- b Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto, USP, Ribeirão Preto, SP, Brazil
| | - Carlos R Tirapelli
- a Escola de Enfermagem de Ribeirão Preto, DEPCH, Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil
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Abstract
Erectile dysfunction (ED) is one of the most common disorders in male and is often associated with other age-related comorbidities. The aging process affects the structural organization and function of penile erectile components such as smooth muscle cell and vascular architecture. These modifications affect penile hemodynamics by impairing cavernosal smooth muscle cell relaxation, reducing penile elasticity, compliance and promoting fibrosis. This review aims to identify the mechanisms of ED in the penile aging process in experimental and clinical data. It also highlights areas that are in need of more research. The search strategies yielded total records screened from PubMed. Clarification of the molecular mechanisms that accompanies corpus cavernosum aging and aging-associated ED will aid new perspectives in the development of novel mechanism-based therapeutic approaches. Age is not a limiting factor for ED medical management, and it is never too late to treat. Hypogonadism should be managed regardless of age, and synergistic effects have been found during testosterone (T) replacement therapy when used along with oral phosphodiesterase-5 (PDE-5) inhibitors. Therefore, the clinical management of ED related to aging can be done by therapeutic interventions that include PDE-5 inhibitors, and other pharmacological treatments.
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Affiliation(s)
- Ecem Kaya
- a Department of Biochemistry and Pharmacology , Faculty of Pharmacy, Ankara University , Ankara , Turkey and
| | - Suresh C Sikka
- b Department of Urology and Pharmacology , Tulane University Health Sciences Center , New Orleans , LA , USA
| | - Philip J Kadowitz
- b Department of Urology and Pharmacology , Tulane University Health Sciences Center , New Orleans , LA , USA
| | - Serap Gur
- a Department of Biochemistry and Pharmacology , Faculty of Pharmacy, Ankara University , Ankara , Turkey and
- b Department of Urology and Pharmacology , Tulane University Health Sciences Center , New Orleans , LA , USA
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Castela A, Gomes P, Domingues VF, Paíga P, Costa R, Vendeira P, Costa C. Role of oxidative stress-induced systemic and cavernosal molecular alterations in the progression of diabetic erectile dysfunction. J Diabetes 2015; 7:393-401. [PMID: 24910190 DOI: 10.1111/1753-0407.12181] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 05/13/2014] [Accepted: 06/01/2014] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND Erectile dysfunction (ED) is a prevalent complication of diabetes, and oxidative stress is an important feature of diabetic ED. Oxidative stress-induced damage plays a pivotal role in the development of tissue alterations. However, the deleterious effects of oxidative stress in the corpus cavernosum with the progression of diabetes remain unclear. The aim of this study was to evaluate systemic and penile oxidative stress status in the early and late stages of diabetes. METHODS Male Wistar streptozotocin-diabetic rats (and age-matched controls) were examined 2 (early) and 8 weeks (late) after the induction of diabetes. Systemic oxidative stress was evaluated by urinary H2 O2 and the ratio of circulating reduced/oxidized glutathione (GSH/GSSG). Penile oxidative status was assessed by H2 O2 production and 3-nitrotyrosine (3-NT) formation. Cavernosal endothelial nitric oxide synthase (eNOS) was analyzed by quantitative immunohistochemistry. Dual immunofluorescence was also performed for 3-NT and α-smooth muscle actin (α-SMA) and eNOS-α-SMA. RESULTS There was a significant increase in urinary H2 O2 levels in both diabetic groups. The plasma GSH/GSSG ratio was significantly augmented in late diabetes. In cavernosal tissue, H2 O2 production was significantly increased in late diabetes. Reactivity for 3-NT was located predominantly in cavernosal smooth muscle (SM) and was significantly reduced in late diabetes. Quantitative immunohistochemistry revealed a significant decrease in eNOS levels in cavernosal SM and endothelium in late diabetes. CONCLUSIONS The findings indicate that the noxious effects of oxidative stress are more prominent in late diabetes. Increased penile protein oxidative modifications and decreased eNOS expression may be responsible for structural and/or functional deregulation, contributing to the progression of diabetes-associated ED.
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Affiliation(s)
- Angela Castela
- Department of Biochemistry (U38/FCT), Center for Medical Research, Faculty of Medicine of the University of Porto, Porto, Portugal; Institute for Molecular and Cell Biology of the University of Porto (IBMC-UP), Porto, Portugal
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Segal R, Hannan JL, Liu X, Kutlu O, Burnett AL, Champion HC, Kim JH, Steppan J, Berkowitz DE, Bivalacqua TJ. Chronic oral administration of the arginase inhibitor 2(S)-amino-6-boronohexanoic acid (ABH) improves erectile function in aged rats. ACTA ACUST UNITED AC 2012; 33:1169-75. [PMID: 22492840 DOI: 10.2164/jandrol.111.015834] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Arginase expression and activity have been noted to be heightened in conditions associated with erectile dysfunction, including aging. Previously, arginase inhibition by chronic administration of the arginase inhibitor 2-(S)-amino-6-boronohexanoic acid (ABH) has been shown to improve endothelial dysfunction in aged rats. The objective of this study was to assess whether chronic oral ABH administration affects cavernosal erectile function. Rats were divided into 4 groups: young control, young treated with arginase inhibitor, aged control, and aged treated with arginase inhibitor. Arginase activity was measured and presented as a proportion of young untreated rats. In vivo erectile responses to cavernous nerve stimulation were measured in all cohorts. The cavernous nerve was stimulated with a graded electrical stimulus, and the intracavernosal/mean arterial pressure ratios and total intracavernosal pressure were recorded. Arginase activity was elevated in the aged rats compared with young controls; however, arginase activity was significantly decreased in aged rats treated with ABH. With the addition of ABH, erectile responses improved in the aged rats (P < .05). Oral inhibition of arginase with ABH results in improved erectile function in aged rats, resulting in erectile hemodynamics similar to young rats. This represents the first documentation of systemic arginase inhibition positively affecting corporal cavernosal function.
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Affiliation(s)
- Robert Segal
- Department of Urology, The James Buchanan Brady Urological Institute, Johns Hopkins MedicalInstitutions, Baltimore, Maryland, USA.
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Wu X, Song B, Zhang J, Li L, Ji H, Lu G, Chen Z, Li W, Zhou Z. Human Telomerase Reverse Transcriptase Transfection Reduces Apoptosis in Human Penile Smooth Muscle Cells and Slows Down Cellular Aging. J Sex Med 2012; 9:494-504. [DOI: 10.1111/j.1743-6109.2011.02603.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Protein kinases as targets for interventive biogerontology: overview and perspectives. Exp Gerontol 2012; 47:290-4. [PMID: 22269334 DOI: 10.1016/j.exger.2012.01.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2011] [Revised: 01/10/2012] [Accepted: 01/10/2012] [Indexed: 11/20/2022]
Abstract
Protein kinases are enzymes that catalyze the transfer of γ phosphate from adenosine triphosphate to substrate proteins, and are important signal transduction mediators in a diversity of biological processes, ranging from apoptosis to energy metabolism. In this article, we will take this prominent class of proteins as an example to illustrate the involvement of proteins in modulation of aging and to highlight the prospects and challenges of protein-targeted interventions for anti-aging purposes. It is hoped that through this article, more empirical work on interventive gerontology will follow, and with collaborative endeavors among researchers, hurdles in anti-aging intervention development can be overcome in the near future.
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Reversion of penile fibrosis: Current information and a new horizon. Arab J Urol 2011; 9:49-55. [PMID: 26579268 PMCID: PMC4149188 DOI: 10.1016/j.aju.2011.03.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2011] [Accepted: 02/14/2011] [Indexed: 11/22/2022] Open
Abstract
Ageing has a detrimental effect on cavernous tissue and the tunica albuginea of the penis. Furthermore, atherosclerosis of the penile vessels that occurs with ageing causes a decrease in penile oxygen tension. A reduction in smooth muscle cells (SMCs) was shown in relation to diminution of oxygen tension. Chronic ischaemia is therefore not only associated with fibrosis but also with nitric oxide-cyclic guanosine monophosphate reduction. The sensitivity of the α-adrenoceptors on the SMCs increases with ageing. The decrease in penile elasticity and compliance are explained by the changes in the ratio of penile collagen that occur with ageing. Contradictory to the view that testosterone is only necessary for sexual desire, numerous recent studies showed that androgen deprivation produces penile tissue atrophy, alterations in dorsal nerve structure, alterations in endothelial morphology, reduction in trabecular SM content, increase in deposition of extracellular matrix and accumulation of fat-containing cells (adipocytes) in the subtunical region of corpus cavernosum. The aim of the current review is to shed some light on the underlying aetiology of corporal fibrosis especially ageing, cavernous nerve damage, androgen deprivation and tunical fibrosis. Ultimately I will address the proposed prevention of erectile dysfunction associated with penile fibrosis.
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Key Words
- (i)(e)NO(S), (inducible) (endothelial) nitric oxide (synthase)
- CVOD, corporal veno-occlusive dysfunction
- Corpora cavernosa
- ECM, extracellular matrix
- ED, erectile dysfunction
- Fibrosis
- HIF-1α, hypoxia-inducible factor-1α
- PD, Peyronie’s disease
- PDE5-I, phosphodiesterase type 5 inhibitor
- PGE, prostaglandin E
- ROS, reactive oxygen species
- SM(C), smooth muscle (cells)
- Tunica albuginea
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