Effects of testosterone on erectile function: implications for the therapy of erectile dysfunction
|
|
- Sherilyn Lane
- 5 years ago
- Views:
Transcription
1 Mini Reviews SAAD et al. Effects of testosterone on erectile function: implications for the therapy of erectile dysfunction Farid Saad, Anca S. Grahl 1, Antonio Aversa 2, Aksam A. Yassin 3,4, Atez Kadioglu 5, Ignacio Moncada 6 and Ian Eardley 7 GBU Gynecology Andrology, Bayer Schering Pharma, Berlin, Germany, and 1 Freelance (Medical Writer), Ulm, Germany, 2 School of Medicine and Surgery, La Sapienza, University of Rome, Italy, 3 Segeberger Kliniken, Norderstedt Hamburg, Germany, 4 School of Medicine, Gulf Medical College, Ajman, United Arab Emirates, 5 Faculty of Medicine, Section of Andrology, University of Istanbul, Istanbul, Turkey, 6 Urology/Andrology, Hospital Gregorio Marañón, Madrid, Spain, and 7 Pyrah Department of Urology, St James s University Hospital, Leeds, UK Accepted for publication 17 November 2006 Sexual potency declines with age, as does the efficiency of erection. Many studies show that different patterns of erectile dysfunction (ED), varying from occasional inability to obtain a full erection, impairment throughout intercourse and total absence of erectile response, might not be triggered by psychological factors only. Recent research indicates that ED relies on organic causes, and has challenged the development of new therapies. One therapeutic approach in patients who have testosterone deficiency is based on androgen therapy. Thus, we reviewed data on testosterone-induced effects relative to erectile function, summarizing the results from studies reported in on testosterone therapy in patients with ED and hypogonadism, with a special focus on men not responding to phosphodiesterase-5 (PDE-5) inhibitors. We searched several computerized databases parallel with printed bibliographic references. Many studies have established animal models, which confirm that testosterone is important in modulating the central and peripheral regulation of ED. Testosterone deprivation has a strong negative impact on the structure of penile tissues and erectile nerves, which can be prevented by androgen administration. Combined therapy regimens with PDE-5 inhibitors and testosterone might improve ED in patients with hypogonadism of different causes. Thus, androgen treatment in hypogonadic patients, including those unresponsive to PDE-5 inhibitors, often results in an improvement of ED. Testosterone therapy is safe and convenient, while rapidly correcting low testosterone levels. KEYWORDS hypogonadism, testosterone, replacement therapy, erectile function INTRODUCTION Reproduction is the most distinguishing characteristic of life, driving evolution throughout the diversity of plant and animal species. Human beings follow a primordial reproductive impulse towards the perpetuation of life, and experience emotions within the sphere of sexual behaviour. Therefore, human sexuality cannot be reduced simply to an the function of insemination only. However, the human reproductive system is very similar to that of many other mammals [1]. The anatomy of the male genitalia is very complex. The penis consists of a pair of erectile chambers, the corpora cavernosa, filled with spongy material composed predominantly of smooth muscles and connective tissue [2]. An erection, which can be triggered by direct stimulation of the genitalia or through integrated sensorial stimuli, is therefore a complex, partly involuntary, neuropsychological, and hormone-mediated vascular event. It occurs when blood rapidly flows into the penis and becomes trapped in the cavernosa. Accordingly, penile erection is not a random phenomenon but a discrete, timely and adjusted event, consequent to sexual desire and arousal. Physiologically, the vascular response is achieved by two parallel mechanisms, increased inflow of blood and decreased outflow [3]. This event is controlled by parasympathetic mechanisms and modulated through the action of androgens [4 10]. The major mediator of smooth muscle relaxation in cavernosal arteries and trabecular muscle is nitric oxide (NO), which activates guanylate cyclase and increases cgmp levels [6,11,12]. The cellular cgmp level reflects a dynamic balance between its production and degradation by cyclic nucleotide phosphodiesterases (PDEs). Testosterone plays a role in balancing the cgmp levels [13], and both cgmp formation and degradation are affected by testosterone. Because testosterone positively controls both the initiation (NO synthase, NOS) and the end (PDE-5) of the erectile process, its overall effect on erection is modest. Hence, erections are still possible in hypogonadal conditions, where decreased cgmp formation, due to impaired NO production, is most probably counterbalanced by reduced PDE-5 activity and cgmp hydrolysis. The main physiological action of testosterone is therefore to synchronize the erectile process as a function of sexual desire, thereby finalizing erections to sex. ERECTILE DYSFUNCTION (ED): DEFINITION AND AETIOLOGY What exactly constitutes ED of sufficient severity to require therapy? Since 1974, the WHO has described ED as a persistent inability (for 3 months) to attain and/or maintain a sufficient erection, resulting in unsatisfactory sexual intercourse [14]. In randomized trials, ED is diagnosed based on the score obtained using the International Index of Erectile Function (IIEF), a questionnaire using the best 988 JOURNAL COMPILATION 2007 BJU INTERNATIONAL 99, doi: /j x x
2 discriminative criteria of a man s ability to initiate, maintain and complete sexual intercourse. Using the IIEF-5 score (for which only the five most significant questions are assessed), the maximum score was established as 25 and the minimum as 5. Men with no ED have a mean score of 23 and men with ED a mean score of 11. Pathological conditions (e.g. diabetes, hypertension, neurological disorders, multiple sclerosis, TURP, coronary artery disease or spinal cord injuries) or risk factors like smoking, alcohol consumption and drug use, increase the prevalence of ED. Hormonal dysregulation such as elevated prolactin, hypo- and hyperthyroidism and Cushing syndrome might also cause ED [15]. ED: THE ROLE OF TESTOSTERONE Androgens are regulators of the male reproductive system. In the testes, Leydig cells synthesise and secrete testosterone in response to LH, which is counter-regulated by feedback influences of testosterone and its metabolites [16]. Testosterone and its potent 5α metabolite dihydrotestosterone (DHT) exert androgenic influences during embryogenesis, puberty and adulthood. During fetal development, they cause normal differentiation of male internal and external genitalia. At puberty, testosterone and DHT are required for the development and maintenance of male secondary sexual characteristics. DHT affects prostate growth and masculinization of the skin, while the remaining androgenic effects on muscle, bone, larynx, testes, phallus, libido, and sexual function are produced by testosterone itself. In adults, testosterone and DHT are needed to maintain intact libido and potency, muscle mass and strength, fat distribution, bone mass, erythropoiesis, prostate growth, male hair growth, and spermatogenesis. Testosterone seems to have a major role in modulating erectile function [17,18]. It determines the frequency of nocturnal penile tumescence and has a regulatory action within the CNS through apomorphine-like effects [19]. There is a normal decline of testosterone levels with age; the age-dependent down-regulation of testosterone level is paralleled by increase in its serum-binding counterpart, sex hormonebinding globulin (SHBG). This condition is commonly referred to as late-onset hypogonadism [14,17]. In this review, we introduce the link between testosterone and erectile function, and present clinical studies on testosterone therapy in patients with ED, and in particular those not responding to PDE-5 inhibitors. ANIMAL STUDIES ON THE LINK BETWEEN TESTOSTERONE AND ERECTILE FUNCTION Many studies have established animal models for investigating the role of androgens in the control of erectile function. The rat and the rabbit are optimal, as their erectile function is androgen-dependent. Interestingly, when New Zealand White male rabbits were either kept intact (control), surgically castrated or treated for 2, 4 or 8 weeks with 107 µg/kg per month of the LHRH agonist leuprolide acetate for medical castration, plasma testosterone levels after 2 weeks decreased to 12.8% in castrated rabbits and to 57.4% in leuprolidetreated rabbits, compared with control rabbits [20]. Medical castration in the rabbit was proposed to serve as a study model for testosterone deprivation in ageing men, as the reduction in testosterone levels to about half mimics the subphysiologal testosterone level in ageing men. Further effects of surgical or medical castration in this study were assessed by recording the intracavernosal arterial pressure relative to systemic measurements, after electrical stimulation of the pelvic nerve. Androgen deprivation reduced the intracavernosal pressure at all frequencies tested but did not alter the systemic arterial pressure. The analysis of PDE-5 and NOS activity was not changed by either of the castration methods, by contrast with similar studies in rats, where there was reduced nnos mrna. The authors of the study concluded that androgen deprivation by surgical or medical castration affected penile haemodynamics and erectile function, and induced structural alterations in the corpus cavernosum, with veno-occlusive phenomenon [20]. This observation led to further histopathological investigations. The penile sections were stained with Masson s trichrome and haematoxylin-eosin for smooth muscles and connective tissue, and toluidine blue for fat-containing cells. Orchidectomy resulted in penile atrophy, based on reduced trabecular smooth muscle, increased connective tissue content and accumulation of adipocytes in the subtunical region of the corpus cavernosum. Most strikingly, androgen deprivation seemed to promote the differentiation of progenitor stromal cells into adipogenic lineages, producing fat-containing cells and altering erectile function [21]. Parallel studies in rats showed that castration induces apoptosis of cells from cavernosal and spongiosal tissues, which could be blocked by testosterone [22]. Other structural and biochemical components of erection were also shown to be modulated by testosterone [9]. For instance, Giuliano et al. [23] suggested that the site of androgen action within the penile tissues might be on the pro-erectile postganglionic parasympathetic neurones. Furthermore, recent castration studies in rats showed that testosterone deprivation might alter the dorsal nerve ultrastructure, as the diameter of both myelinated and unmyelinated axons appeared smaller by transmission electron microscopy [24]. TESTOSTERONE THERAPY IN MEN WITH ED In Europe, men with low sexual desire have been treated with testosterone since 1940; this therapy recently re-emerged in the field of ED. In a meta-analysis conducted in 2000, based on a Medline search for , the mean confidence level of response to testosterone treatment was 16.7% in the placebo and 65.4% in the testosteronetreated groups (P < 0.001), indicating the usefulness of testosterone therapy for ED [25]. Recent studies corroborate that some results of testosterone therapy in animals might also apply to humans. Aversa et al. [6] showed that low free testosterone levels correlate with impaired relaxation of cavernous endothelial and corporeal smooth muscle cells to vasoactive challenge [26]. It was reported that nocturnal penile tumescence, arterial cavernosal inflow and visually stimulated erection became normal on testosterone therapy [19]. A recent limited series of case reports suggested that therapy with a novel, long-acting injection of testosterone undecanoate improves erectile function in hypogonadal men by restoring veno-occlusive function [27,28]. Since 1998, there have been three oral medications to treat ED, sildenafil, tadalafil and vardenafil; all belong to the chemical class of PDE-5 inhibitors and have transformed the treatment of ED by providing an effective, well tolerated oral medication. However, especially in patients with comorbidities, ED is often refractory to treatment with PDE-5 inhibitors. Testosterone therapy has been suggested for hypogonadal men not responding to PDE-5 inhibitors; a range of studies corroborate that ED can be JOURNAL COMPILATION 2007 BJU INTERNATIONAL 989
3 SAAD ET AL. effectively treated with currently available preparations of testosterone when combined with PDE-5 inhibitors [29 31]. The erectile response to sildenafil and the arterial inflow into the penis increases in men not responding to sildenafil when they are also given testosterone [27]. In a prospective study including 40 sildenafil nonresponders, testosterone had beneficial effects on erectile response and patient satisfaction [32]. In a randomized, placebo-controlled, doubleblind, parallel-group, multicentre study, 75 hypogonadal men with ED in whom sildenafil monotherapy had failed were selected if they had a morning serum total testosterone level of 400 ng/dl and were aged years. After treatment with a supplementary daily dose of 1% testosterone gel during a 12-week period, there was an improvement in IIEF erectile function score that was statistically significant at 4 weeks (4.4 vs 2.1, P = 0.029, 95% CI ). There were similar trends for improvements in orgasmic function, overall satisfaction and total IIEF score. The gel significantly (P 0.004) increased total and free testosterone levels, although there were no significant correlations between testosterone levels and the IIEF at the endpoint [33]. In a further independent study, 49 hypogonadal patients with ED and a mean age of 60.7 years were treated with testosterone gel as monotherapy for 6 months. After 3 months of treatment, those not responding were given 100 mg of sildenafil as adjuvant medication, after which all responded positively. Moreover, 31 patients receiving testosterone therapy alone reported, after 6 months, an improvement in sexual desire score from a mean (SD) of 4.2 (0.8) to 8.6 (0.4), and of erectile function from 13.6 (1.9) to 27 (0.8) [34]. In a study in the USA, 24 men with a testosterone level of <400 ng/dl (range , mean 231.4) were treated with 1% testosterone gel alone for 4 weeks, and subsequently for an additional 12 weeks with 1% testosterone gel and sildenafil 100 mg. Although testosterone levels had become normal after 4 weeks of testosterone monotherapy, erectile function was not restored; however, with combined testosterone and sildenafil, 92% of the men reported improved potency [35]. Hwang et al. [30] evaluated combined therapy with testosterone and sildenafil in 32 hypogonadal men not responding to sildenafil, based on the variables of the IIEF, the IPSS, and urinary flow rate. While the IIEF score significantly increased, there were no statistical differences for the IPSS or urinary flow rate. In a small prospective pilot study in a few patients with renal-replacement therapy who had ED due to hypogonadism and cavernosal insufficiency, the combined use of testosterone injections and oral sildenafil led to a marked improvement in the overall sexual performance, as assessed by the IIEF score [36]. Yassin et al. [37] conducted an openlabel, retrospective trial with 69 hypogonadal patients with ED, in whom tadalafil monotherapy had failed, using the IIEF score and a partner questionnaire for evaluation; after combined therapy with tadalafil and testosterone, there was an increase in erectile function score. Although the magnitude of the clinical response in patients with ED remains difficult to evaluate, lower testosterone levels at the beginning of therapy correlate with good efficacy and a positive clinical outcome [38]. Overall, if patients are unresponsive to either testosterone or PDE-5 inhibitors alone, it has clearly become clinical practice that the short-term combination can produce an improvement in erectile function and enhance the therapeutic effect of PDE-5 inhibitors. Further randomized, placebocontrolled, multicentre studies with consistent follow-up periods are encouraged to provide final confirmation for this very controversial issue. DISCUSSION The biological mechanisms by which supplementary testosterone acts remains little understood. The normal endogenous concentration of testosterone is nmol/ L. In serum, endogenous testosterone binds to SHBG and, with low affinity, to albumin. The albumin-bound fraction is bioactive, as it dissociates easily [16,17]. However, the systemic availability of testosterone in healthy men declines gradually after the third decade of life by 1% every year, reaching subphysiological values of 35 50% in the sixth decade. Recent studies indicate that low testosterone levels also have a negative correlation with body mass index [18,39]. The consecutive androgen deprivation reflects multisite failure in the GnRH-LH-testosterone axis; this might often result in ED [40]. The ageing male symptoms with subsequent hormonal changes might result from concerted endocrine dysregulation, including modifications of dehydroepiandrosterone and oestradiol levels [41]. During androgen therapy, endogenous testosterone release is inhibited through feedback mechanisms on pituitary LH secretion. Parallel with the classical activation of the androgen receptors, one independent pathway might lead to nongenomic effects like rapid vasodilatation. This might be the result of calcium-channel activation, the vascular endothelial growth factor pathway and/or NO mechanism with cgmp release. Classical and other testosterone binding sites might coexist in the same cells. Furthermore, epigenetic and tissue-specific transcription factors might have a combinatorial role in mediating the effects of testosterone at the molecular level and influence its bivalent action towards the production or destruction of cgmp molecules. There is still controversy on the benefit of testosterone in ageing men [42,43]. In a study of 32 patients with documented hypogonadism and ED, the normalization of testosterone levels was associated with only a short-term improvement in erectile function and sexual satisfaction. However, as the impact of concomitant diseases and of important risk factors of ED was not addressed, and additive therapy with PDE-5 inhibitors was not investigated, the data of this study might not be representative [44]. Androgens are contraindicated in men with known or suspected carcinoma of the prostate; the International Society for the Study of the Aging Male, European Association of Urology, and the Endocrine Society guidelines for testosterone therapy, list the precautions to be followed when administering testosterone [45,46]. The therapeutic regimens with testosterone alone or combined with other drugs must be adjusted for each patient with ED. Important considerations must include age, documented comorbidities, severity of testosterone deficiency, potential side-effects, ease of use and cost of the therapy. CONCLUSIONS A sufficient testosterone level is crucial for the development, growth and function of penile tissue and the regulation of erectile function. Satisfactory options are currently available for testosterone therapy in patients with ED due to low testosterone levels. When not contraindicated, the safe principle is to mimic the normal endogenous concentration of testosterone and its active metabolites. This is achieved by the currently available testosterone patches, gels, and the long- 990 JOURNAL COMPILATION 2007 BJU INTERNATIONAL
4 acting injection of testosterone undecanoate. Combined therapy with PDE-5 inhibitors and testosterone often result in a significant improvement in potency, sexual activity and feelings of well-being, and lead to improved erectile function. In patients with ED in who PDE-5 inhibitor monotherapy has failed, testosterone salvage might temporarily restore the positive clinical response. Further research into the mechanism of testosterone regulation, and controlled data on its longterm safety, must be conducted to provide evidence for more comprehensive therapeutic links. CONFLICT OF INTEREST None declared. Funding for medical writing: Bayer Schering Pharma. REFERENCES 1 Kinsey AC, Pomeroy WB, Martin CE. Sexual behavior in the human male Am J Public Health 2003; 93: Conti G, Virag R. Human penile erection and organic impotence: normal histology and histopathology. Urol Int 1989; 44: Tudoriu T, Bourmer H. The hemodynamics of erection at the level of the penis and its local deterioration. J Urol 1983; 129: Giuliano F, Rampin O. Neural control of erection. Physiol Behav 2004; 83: Bancroft J. Central control and inhibitory mechanisms in male sexual response. Int J Impot Res 1998; 10 (Suppl. 2): S Aversa A, Isidori AM, De Martino MU et al. Androgens and penile erection: evidence for a direct relationship between free testosterone and cavernous vasodilation in men with erectile dysfunction. Clin Endocrinol (Oxf) 2000; 53: Melcangi RC, Poletti A, Cavarretta I et al. The 5α-reductase in the central nervous system: expression and modes of control. J Steroid Biochem Mol Biol 1998; 65: Bialek M, Zaremba P, Borowicz KK, Czuczwar SJ. Neuroprotective role of testosterone in the nervous system. Pol J Pharmacol 2004; 56: Traish AM, Guay AT. Are androgens critical for penile erections in humans? Examining the clinical and preclinical evidence. J Sex Med 2006; 3: Torres JM, Ortega E. Steroid 5αreductase isozymes in the adult female rat brain: central role of dihydrotestosterone. J Mol Endocrinol 2006; 36: Vernet D, Cai L, Garban H et al. Reduction of penile nitric oxide synthase in diabetic BB/WORdp (type I) and BBZ/WORdp (type II) rats with erectile dysfunction. Endocrinology 1995; 136: Bivalacqua TJ, Armstrong JS, Biggerstaff J et al. Gene transfer of extracellular SOD to the penis reduces O2 * and improves erectile function in aged rats. Am J Physiol Heart Circ Physiol 2003; 284: H Morelli A, Filippi S, Zhang XH et al. Peripheral regulatory mechanisms in erection. Int J Androl 2005; 28 (Suppl. 2): Lunenfeld B, Saad F, Hoesl CE. ISA, ISSAM and EAU recommendations for the investigation, treatment and monitoring of late-onset hypogonadism in males: scientific background and rationale. Aging Male 2005; 8: Soran H, Wu FC. Endocrine causes of erectile dysfunction. Int J Androl 2005; 28 (Suppl. 2): Glode L. The biology of gonadotropinreleasing hormone and its analogs. Urology 1986; 27 (Suppl.): Lunenfeld B. Report on the 4th World Congress on the Aging Male. Aging Male 2004; 7: Kratzik CW, Schatzl G, Lunglmayr G, Rucklinger E, Huber J. The impact of age, body mass index and testosterone on erectile dysfunction. J Urol 2005; 174: Foresta C, Caretta N, Rossato M, Garolla A, Ferlin A. Role of androgens in erectile function. J Urol 2004; 171: Traish AM, Munarriz R, O Connell L et al. Effects of medical or surgical castration on erectile function in an animal model. J Androl 2003; 24: Traish AM, Toselli P, Jeong SJ, Kim NN. Adipocyte accumulation in penile corpus cavernosum of the orchiectomized rabbit: a potential mechanism for veno-occlusive dysfunction in androgen deficiency. J Androl 2005; 26: Podlasek CA, Meroz CL, Korolis H, Tang Y, McKenna KE, McVary KT. Sonic hedgehog, the penis and erectile dysfunction: a review of sonic hedgehog signaling in the penis. Curr Pharm Des 2005; 11: Giuliano F, Rampin O, Schirar A, Jardin A, Rousseau JP. Autonomic control of penile erection: modulation by testosterone in the rat. J Neuroendocrinol 1993; 5: Rogers RS, Graziottin TM, Lin CS, Kan YW, Lue TF. Intracavernosal vascular endothelial growth factor (VEGF) injection and adeno-associated virus-mediated VEGF gene therapy prevent and reverse venogenic erectile dysfunction in rats. Int J Impot Res 2003; 15: Jain P, Rademaker AW, McVary KT. Testosterone supplementation for erectile dysfunction: results of a meta-analysis. J Urol 2000; 164: Aversa A, Isidori AM, Spera G, Lenzi A, Fabbri A. Androgens improve cavernous vasodilation and response to sildenafil in patients with erectile dysfunction. Clin Endocrinol (Oxf) 2003; 58: Yassin AA, Saad F. Dramatic improvement of penile venous leakage upon testosterone administration. A case report and review of literature. Andrologia 2006; 38: Yassin AA, Saad F, Traish A. Testosterone undecanoate restores erectile function in a subset of patients with venous leakage: a series of case reports. J Sex Med 2006; 3: Gooren LJ, Saad F. Recent insights into androgen action on the anatomical and physiological substrate of penile erection. Asian J Androl 2006; 8: Hwang TI, Chen HE, Tsai TF, Lin YC. Combined use of androgen and sildenafil for hypogonadal patients unresponsive to sildenafil alone. Int J Impot Res 2006; 18: Rochira V, Balestrieri A, Madeo B, Granata AR, Carani C. Sildenafil improves sleep-related erections in hypogonadal men: evidence from a randomized, placebo-controlled, crossover study of a synergic role for both testosterone and sildenafil on penile erections. J Androl 2006; 27: Shamloul R, Ghanem H, Fahmy I et al. Testosterone therapy can enhance erectile function response to sildenafil in patients with PADAM: a pilot study. J Sex Med 2005; 2: Shabsigh R, Kaufman KJ, Steidle C, Padma-Nathan H. Randomized study of testosterone gel as adjunctive therapy to sildenafil in hypogonadal men with erectile dysfunction who do not respond JOURNAL COMPILATION 2007 BJU INTERNATIONAL 991
5 SAAD ET AL. to sildenafil alone. J Urol 2004; 172: Greenstein A, Mabjeesh NJ, Sofer M, Kaver I, Matzkin H, Chen J. Does sildenafil combined with testosterone gel improve erectile dysfunction in hypogonadal men in whom testosterone supplement therapy alone failed? J Urol 2005; 173: Rosenthal BD, May NR, Metro MJ, Harkaway RC, Ginsberg PC. Adjunctive use of AndroGel (testosterone gel) with sildenafil to treat erectile dysfunction in men with acquired androgen deficiency syndrome after failure using sildenafil alone. Urology 2006; 67: Chatterjee R, Wood S, McGarrigle HH, Lees WR, Ralph DJ, Neild GH. A novel therapy with testosterone and sildenafil for erectile dysfunction in patients on renal dialysis or after renal transplantation. J Fam Plann Reprod Health Care 2004; 30: Yassin AA, Saad F, Diede HE. Testosterone and erectile function in hypogonadal men unresponsive to tadalafil: results from an open-label uncontrolled study. Andrologia 2006; 38: Haren M, Chapman I, Coates P, Morley J, Wittert G. Effect of 12 month oral testosterone on testosterone deficiency symptoms in symptomatic elderly males with low-normal gonadal status. Age Ageing 2005; 34: Svartberg J, von Muhlen D, Sundsfjord J, Jorde R. Waist circumference and testosterone levels in community dwelling men. The Tromso study. Eur J Epidemiol 2004; 19: Veldhuis JD, Keenan DM, Iranmanesh A. Mechanisms of ensemble failure of the male gonadal axis in aging. J Endocrinol Invest 2005; 28 (Suppl.): Basar MM, Aydin G, Mert HC et al. Relationship between serum sex steroids and Aging Male Symptoms score and International Index of Erectile Function. Urology 2005; 66: Handelsman DJ, Zajac JD. Androgen deficiency and replacement therapy in men. Med J Aust 2004; 180: Christ-Crain M, Mueller B, Gasser TC et al. Is there a clinical relevance of partial androgen deficiency of the aging male? J Urol 2004; 172: Mulhall JP, Valenzuela R, Aviv N, Parker M. Effect of testosterone supplementation on sexual function in hypogonadal men with erectile dysfunction. Urology 2004; 63: Nieschlag E, Swerdloff R, Behre HM et al. Investigation, treatment, and monitoring of late-onset hypogonadism in males: ISA, ISSAM, and EAU recommendations. J Androl 2006; 27: Bhasin S, Cunningham GR, Hayes FJ et al. Testosterone therapy in adult men with androgen deficiency syndromes: an Endocrine Society clinical practice guideline. J Clin Endocrinol Metab 2006; 91: Correspondence: Anca Grahl, Freelance Medical Writer, Schering AG, Ulm, Germany. anca.grahl@gmx.net, Farid.Saad@Schering.de Abbreviations: ED, erectile dysfunction; NO(S), nitric oxide (synthase); PDE, phosphodiesterase; IIEF, International Index of Erectile Function; DHT, dihydrotestosterone; SHBG, sex hormonebinding globulin. In [1], the following error was present in the submitted manuscript and subsequently appeared Online Early and in the print issue BJU99:5. PAGE 988 The list of authors names. The fifth author s name should have appeared as Ates Kadioglu and not Atez Kadioglu. The list of authors names should therefore have appeared as follows: Farid Saad, Anca S. Grahl, Antonio Aversa, Aksam A. Yassin, Ates Kadioglu, Ignacio Moncada and Ian Eardley. REFERENCE 1 Saad F, Grahl AS, Aversa A et al. Effects of testosterone on erectile function: implications for the therapy of erectile dysfunction. BJU Int 2007; doi: /j x x 992 JOURNAL COMPILATION 2007 BJU INTERNATIONAL
Sponsored by. Schering. Sidney Glina
Sponsored by Schering Sidney Glina Testosterone and erectile dysfunction Sidney Glina Keywords Androgen Hormone replacement therapy Hypogonadism Impotence Testosterone Abstract The role of testosterone
More informationTHE RELEVANCE OF TESTOSTERONE THERAPY IN MANAGING PATIENTS WITH ERECTILE DYSFUNCTION
THE RELEVANCE OF TESTOSTERONE THERAPY IN MANAGING PATIENTS WITH ERECTILE DYSFUNCTION Aksam A. Yassin MD PhD EdD FEBU Professor of Urology & Human Sexuality Institute of Urology & Andrology, Segeberger
More informationTestosterone and PDE5 inhibitors in the aging male
Testosterone and PDE5 inhibitors in the aging male Francesco Romanelli Department of Experimental Medicine Medical Pathophysiology, Food Science and Endocrinology Section Sapienza University of Rome 3005
More informationREVIEW The relationship between hypogonadism and erectile dysfunction
(2008) 20, 231 235 & 2008 Nature Publishing Group All rights reserved 0955-9930/08 $30.00 www.nature.com/ijir REVIEW The relationship between hypogonadism and erectile dysfunction TIS Hwang 1,2,3 and Y-C
More informationThe Role of Testosterone in the Sexual Function. Luiz Otavio Torres President Elect of ISSM Belo Horizonte - Brazil
The Role of Testosterone in the Sexual Function Luiz Otavio Torres President Elect of ISSM Belo Horizonte - Brazil Hormones and Sexual Function Paraventricular Nucleus Stimuli visual Sexual Desire Melatonine
More informationMALE SEXUAL DYSFUNCTION. Urology Division, Surgery Department Medical Faculty, University of Sumatera Utara
MALE SEXUAL DYSFUNCTION Urology Division, Surgery Department Medical Faculty, University of Sumatera Utara DEFINITION The inability to achieve a satisfactory sexual relationship May involve : - inadequacy
More informationTestosterone therapy in erectile dysfunction
The Aging Male 2004;7:312 318 Testosterone therapy in erectile dysfunction R. Department of Urology, Columbia University, New York, USA Key words: TESTOSTERONE, TESTOGEL 1, ERECTILE DYSFUNCTION, HYPOGONADISM,
More informationAdministration of Testosterone and its Rationale in the Treatment of Erectile Dysfunction
ORIGINAL ARTICLE Administration of Testosterone and its Rationale in the Treatment of Erectile Dysfunction *CATM Mowladad 1, HM Rafiqul 2, A Bakhtiar 3, KM Rahman 4, R Shofiqur 5 *1 Prof. Chowdhury ATM
More information/04/ /0 Reprinted from Vol. 172, , August 2004 THE JOURNAL OF UROLOGY
0022-5347/04/1722-0658/0 Reprinted from Vol. 172, 658 663, August 2004 THE JOURNAL OF UROLOGY Printed in U.S.A. Copyright 2004 by AMERICAN UROLOGICAL ASSOCIATION DOI: 10.1097/01.ju.0000132389.97804.d7
More informationMMM. Topic The use of Tadalafil 5mg daily for the treatment of BPH-LUTS
Dr Tan & Partners MMM Vol. 1 No. 1 Morbidity & Mortality Meeting 14 th November 2014 Introduction Topic The use of Tadalafil 5mg daily for the treatment of BPH-LUTS Tadalafil 5mg daily is a well established
More informationManaging the Patient with Erectile Dysfunction: What Would You Do?
Managing the Patient with Erectile Dysfunction: What Would You Do? Florida A & M University College of Pharmacy and Pharmaceutical Sciences 42 nd Annual Clinical Symposium Wayne A. Sampson, M.D. Cross
More informationCombining Testosterone and PDE5 Inhibitors in Erectile Dysfunction: Basic Rationale and Clinical Evidences
european urology 50 (2006) 940 947 available at www.sciencedirect.com journal homepage: www.europeanurology.com Review Sexual Medicine Combining Testosterone and PDE5 Inhibitors in Erectile Dysfunction:
More informationDefined as the consistent inability to attain and maintain an erection adequate for sexual intercourse Usually qualified by being present for several
Defined as the consistent inability to attain and maintain an erection adequate for sexual intercourse Usually qualified by being present for several months and occurring at least half the time. Vinik
More informationTreatment Strategy for Non-Responders to PDE5 Inhibitors
pissn: 2287-4208 / eissn: 2287-4690 World J Mens Health 2013 April 31(1): 31-35 http://dx.doi.org/10.5534/wjmh.2013.31.1.31 Review Article Treatment Strategy for Non-Responders to PDE5 Inhibitors Nam Cheol
More informationSildenafil citrate improves erectile function after castration in a rat model
Sildenafil citrate improves erectile function after castration in a rat model John P. Mulhall*, Nipun Verma, Serkan Deveci, Raanan Tal*, Keith Kobylarz and Alexander Müller* *Department of Urology, Memorial
More informationERECTILE DYSFUNCTION. & Current Therapies. GP Conference, Rotorua 7-10 June 2012
ERECTILE DYSFUNCTION & Current Therapies GP Conference, Rotorua 7-10 June 2012 Jan Burns & Annie Woodsford Jan: EN, RCpN, BHSc, RPN (USA),MHSc, Member of the Sexual Medicine Society Urology Nurse Specialist
More informationDiagnosis and management of sexual dysfunction. Dr Chris Simpson Consultant Psychiatrist
Diagnosis and management of sexual dysfunction Dr Chris Simpson Consultant Psychiatrist What are we talking about? Male Erectile dysfunction Premature ejaculation Delayed ejaculation Sexual aversion Paraphilia
More informationTestosterone levels in men with erectile dysfunction
Original Article TESTOSTERONE LEVELS IN MEN WITH ED MARTÍNEZ-JABALOYAS et al. Testosterone levels in men with erectile dysfunction JOSÉ M. MARTÍNEZ-JABALOYAS, ALFONSO QUEIPO-ZARAGOZÁ*, FRANCISCO PASTOR-HERNÁNDEZ,
More informationfor ED and LUTS/BPH Pierre Sarkis, M.D. Assistant Professor Fellow of the European Board of Urology
Tadalafil 5 mg once daily for ED and LUTS/BPH Pierre Sarkis, M.D. Assistant Professor Fellow of the European Board of Urology Why this conference? Not promotional but educational The pharmacist regularly
More informationIC351 (tadalafil, Cialis): update on clinical experience
(2002) 14, Suppl 1, S57 S64 ß 2002 Nature Publishing Group All rights reserved 0955-9930/02 $25.00 www.nature.com/ijir IC351 (tadalafil, Cialis): update on clinical experience 1 * 1 Urological practice,
More informationErectile Dysfunction: A Primer for Primary Care Providers
Erectile Dysfunction: A Primer for Primary Care Providers Jeanne Martin, DNP, ANP-BC Objectives 1. Understand the definition, incidence and prevalence of Erectile Dysfunction in the U.S. 2. Understand
More informationCorporate Medical Policy Testosterone Pellet Implantation for Androgen Deficiency
Corporate Medical Policy Testosterone Pellet Implantation for Androgen Deficiency File Name: Origination: Last CAP Review: Next CAP Review: Last Review: testosterone_pellet_implantation_for_androgen_deficiency
More informationErectile dysfunction
Erectile dysfunction Good Erectile Function Having good Erections => crucial for all men Because erections & the coitus they allow major pleasure brings self-confidence confirms his state of being a full
More informationCanadian Undergraduate Urology Curriculum (CanUUC): Erectile Dysfunction
Canadian Undergraduate Urology Curriculum (CanUUC): Erectile Dysfunction Last reviewed July 2014 Objectives 1. Define erectile dysfunction 2. List and classify the risk factors for erectile dysfunction
More informationHow to treat: TRT modalities and formulations
How to treat: TRT modalities and formulations Paul PIETTE, PharmD Senior Research Fellow Clinique Antoine Depage - Belgium ppiette@besins-healthcare.com Bruges 2014, May 15 th Testosterone-replacement
More informationHypogonadism 4/27/2018. Male Hypogonadism -- Definition. Epidemiology. Objectives HYPOGONADISM. Men with Hypogonadism. 95% untreated.
Male Hypogonadism -- Definition - Low T, Low Testosterone Hypogonadism -...a clinical syndrome that results from failure of the testes to produce physiological concentrations of testosterone due to pathology
More informationDifferent hemodynamic responses by color Doppler ultrasonography studies between sildenafil non-responders and responders
DOI: 10.1111/j.1745-7262.2007.00227.x www.asiaandro.com. Clinical Experience. Different hemodynamic responses by color Doppler ultrasonography studies between sildenafil non-responders and responders Shih-Tsung
More informationSexual dysfunction of chronic kidney disease. Razieh salehian.md psychiatrist
Sexual dysfunction of chronic kidney disease Razieh salehian.md psychiatrist Disturbances in sexual function are a common feature of chronic renal failure. Sexual dysfunction is inversely associated with
More informationSerum Total Testosterone Level and Identification of Late-Onset Hypogonadism: A Community-Based Study
www.kjurology.org http://dx.doi.org/10.4111/kju.2013.54.9.619 Sexual Dysfunction/Male Infertility Serum Total Testosterone Level and Identification of Late-Onset Hypogonadism: A Community-Based Study Sungmin
More information6/14/2010. GnRH=Gonadotropin-Releasing Hormone.
Male Androgen Replacement Mitchell Sorsby, MD June 19, 2010. QUESTION # 1 Which of the following is not a symptom associated with low T levels? a) decreased libido b) erectile dysfunction c) depression
More informationORIGINAL ARTICLE Efficacy of testosterone gel in the treatment of erectile dysfunction in hypogonadal hemodialysis patients: a pilot study
(2010) 22, 140 145 & 2010 Nature Publishing Group All rights reserved 0955-9930/10 $32.00 www.nature.com/ijir ORIGINAL ARTICLE Efficacy of testosterone gel in the treatment of erectile dysfunction in hypogonadal
More informationSexual dysfunction in men with diabetes
Article Sexual dysfunction in men with diabetes Lesley Mills Citation: Mills L (2015) Sexual dysfunction in men with diabetes. Journal of Diabetes Nursing 19: 332 8 Article points 1. Sexual dysfunction
More informationSexual function and dysfunction in men
Georges A. de Boccard,, M.D. Consultant Urologist F.E.B.U. Sexual function and dysfunction in men Geneva Foundation for Medical Education and Research Training Course in Reproductive Health / Sexual Health
More informationManaging Erectile Dysfunction
Managing Erectile Dysfunction Lewis E. Harpster MD, FACS Urology of Central PA 4/23/16 1 Objectives 1. Review physiologic mechanism of erection 2. Discuss medical management of ED 3. Discuss surgical management
More informationPRISM Bruges June Herman Leliefeld Urologist. The Netherlands
PRISM Bruges 25-26 June 2015 Herman Leliefeld Urologist The Netherlands Guidelines EAU 2015: a rich source of Knowledge! Epidemiology/ Aetiology / Pathology Diagnostic evaluation Disease management Follow-Up
More informationPhysiology and disturbances of sexual functions Prof. Jolanta Słowikowska-Hilczer, M.D., Ph.D.
Physiology and disturbances of sexual functions Prof. Jolanta Słowikowska-Hilczer, M.D., Ph.D. Department of Andrology and Reproductive Endocrinology Medical University of Łódź, Poland SEXUALITY Sexuality
More informationPoint-Counterpoint: Late Onset Hypogonadism (LOH)
Point-Counterpoint: Late Onset Hypogonadism (LOH) We are Under-diagnosing and Treating Men with LOH LOH is a Non-existent Disease ~ Robert E. Donohue, MD Late Onset Hypogonadism LOH: underdx. & undertx
More information, David Stultz, MD. Erectile Dysfunction. David Stultz, MD September 10, 2001
Erectile Dysfunction David Stultz, MD September 10, 2001 Case Presentation A 66 year old male presents to your office requesting Viagra. He states that for the past year he has had difficulty forming
More informationSmooth muscle pathology and erectile dysfunction
(2002) 14, Suppl 1, S17 S21 ß 2002 Nature Publishing Group All rights reserved 0955-9930/02 $25.00 www.nature.com/ijir and erectile dysfunction 1 * 1 Department of Urology, C.H.U. de Charleroi, Charleroi,
More informationOpinion: Yes. PDE-5 inhibitors should be used post radical prostatectomy as erection function rehabilitation?
Difference of opinion Vol. 43 (3): 385-389, May - June, 2017 doi: 10.1590/S1677-5538.IBJU.2017.03.03 PDE-5 inhibitors should be used post radical prostatectomy as erection function rehabilitation? Opinion:
More informationMANAGEMENT UPDATE , LLC MedReviews
MANAGEMENT UPDATE 2013 MedReviews, LLC rostate cancer is the most common cancer in men over the age of 50 years. 1 When patients undergo a radical prostatectomy (RP), there is a risk of postoperative erectile
More informationERECTILE DYSFUNCTION DIAGNOSIS
ERECTILE DYSFUNCTION DIAGNOSIS Head of Andrology and Sexual Medicine Dep.of Urology and Nefrology Hospital Virgen del Rocío ANDROMEDI. Sexual Medicine SEVILLA. SPAIN General Secretary ESSM Natalio Cruz
More informationSexual Dysfunction. Jae Il Kang, Byeong Kuk Ham, Mi Mi Oh, Je Jong Kim, Du Geon Moon. DOI: /kju
www.kjurology.org DOI:10.4111/kju.2011.52.6.416 Sexual Dysfunction Correlation between Serum Total Testosterone and the AMS and IIEF Questionnaires in Patients with Erectile Dysfunction with Testosterone
More informationTESTOSTERONE DEFINITION
DEFINITION A hormone that is a hydroxyl steroid ketone (C19H28O2) produced especially by the testes or made synthetically and that is responsible for inducing and maintaining male secondary sex characteristics.
More informationEvidence Review for Surrey Prescribing Clinical Network. Treatment: Oral and non-oral combination therapy for erectile dysfunction
Evidence Review for Surrey Prescribing Clinical Network Treatment: Oral and non-oral combination therapy for erectile dysfunction Prepared by: Linda Honey Topic Submitted by: Prescribing Clinical Network
More informationAging is associated with a decline in several
Journal of Andrology, Vol. 29, No. 6, November/December 2008 Copyright E American Society of Andrology Testosterone and Erectile Dysfunction Review AKSAM A. YASSIN* AND FARID SAAD{ From the *Clinic of
More informationDisclosure Slide. Dr Michael Gillman IMPOTENCE ERECTILE DIFFICULTIES. Do Men Really Care??? 15/10/2014 ASSESSMENT OF ERECTILE DYSFUNCTION
ASSESSMENT OF ERECTILE DYSFUNCTION Dr Michael Gillman St Andrews Hospital North St Specialist Suites Mater Hospital 3 rd Floor Mater Private Clinic Wesley Hospital Suite 5 Level 9 Evan Thomson Bld Cleveland-
More informationREPRODUCTIVE ENDOCRINOLOGY OF THE MALE
Reproductive Biotechnologies Andrology I REPRODUCTIVE ENDOCRINOLOGY OF THE MALE Prof. Alberto Contri REPRODUCTIVE ENDOCRINOLOGY OF THE MALE SPERMATOGENESIS AND REPRODUCTIVE BEHAVIOR RELATED TO THE ACTIVITY
More informationProduct Introduction
Product Introduction 康達生命科學有限公司 Contek Life Science Co., Ltd. Red Algae Peptide Hydrolysate-EDpeptide The Next Generations of Erectile Dysfunction Cure Introduction of small peptides Erectile dysfunction
More informationIan Eardley Department of Urology, Leeds Teaching Hospital Trust
Ian Eardley Department of Urology, Leeds Teaching Hospital Trust Assessment of the man with ED Medical therapy for man with ED What to do when pills fail Sexual stimulus Neural pathways Neurotransmitter
More informationDiagnosis and Clinical Evaluation of Hypogonadism in Adult Patients with Obesity and Diabetes
Diagnosis and Clinical Evaluation of Hypogonadism in Adult Patients with Obesity and Diabetes Adrian Dobs, M.D., M.H.S. Professor of Medicine and Oncology The Johns Hopkins University School of Medicine
More informationChronic Daily Administration of Vardenafil in Erectile Dysfunction Patients Has No Impact on Semen Parameters or on Sex Hormones Levels
Australian Journal of Basic and Applied Sciences, 2(3): 779-784, 2008 ISSN 1991-8178 Chronic Daily Administration of Vardenafil in Erectile Dysfunction Patients Has No Impact on Semen Parameters or on
More informationTestosterone and Erectile Dysfunction
Published-Ahead-of-Print on July 17, 2008 by Journal of Andrology Testosterone and Erectile Dysfunction Short title Testosterone and Erectile Dysfunction Aksam A Yassin, MD, PhD, EdD, FEBU [1], Farid Saad,
More informationGUIDELINES ON ERECTILE DYSFUNCTION
16 GUIDELINES ON ERECTILE DYSFUNCTION E. Wespes (chairman), E. Amar, D. Hatzichristou, Dr. F. Montorsi, J. Pryor, Y. Vardi Eur Urol 2002;41:1-5 1. Background, definition and classification Male erectile
More informationReview Article Penile Rehabilitation Therapy with PDE-V Inhibitors Following Radical Prostatectomy: Proceed with Caution
Advances in Urology Volume 2009, Article ID 852437, 4 pages doi:10.1155/2009/852437 Review Article Penile Rehabilitation Therapy with PDE-V Inhibitors Following Radical Prostatectomy: Proceed with Caution
More informationErectile Dysfunction
a report by Asif Muneer, Nigel Borley and David J Ralph The St Peter s Andrology Centre, London Erectile dysfunction is a common male sexual function disorder and is defined as the inability to achieve
More informationTestosterone therapy (TTh) prevents progression from prediabetes to type 2 diabetes (T2DM) in hypogonadal: 9-year data from a registry study
Testosterone therapy (TTh) prevents progression from prediabetes to type 2 diabetes (T2DM) in hypogonadal: 9-year data from a registry study F Saad 1,2, KS Haider 3, A Haider 3 1 Global Medical Affairs
More informationERECTILE DYSFUNCTION TREATMENTS
ERECTILE DYSFUNCTION TREATMENTS Coverage for services, procedures, medical devices and drugs are dependent upon benefit eligibility as outlined in the member's specific benefit plan. This Medical Coverage
More informationGerald Brock Professor of Surgery University of Western Ontario
Treatment Induced Erectile Dysfunction Gerald Brock Professor of Surgery University of Western Ontario 1 1 2 Should you believe in Rehab? 3 3 Should you believe in Rehab? Avoidance Education related to
More informationManaging Testosterone Deficiency: A Practical Guide. John Grantmyre MD Professor of Urology Dalhousie University
Managing Testosterone Deficiency: A Practical Guide John Grantmyre MD Professor of Urology Dalhousie University 1 2 Case Study #1 A 59-Year-Old Man with Erectile Dysfunction 3 Case History Robert is a
More informationMen Getting Older Will Testosterone Keep Him Young?
Men Getting Older Will Testosterone Keep Him Young? Alvin M. Matsumoto, M.D. Associate Director, GRECC V.A. Puget Sound Health Care System Professor, Department of Medicine Division of Gerontology and
More informationTestosterone Treatment: Myths Vs Reality. Fadi Al-Khayer, M.D, F.A.C.E
Testosterone Treatment: Myths Vs Reality Fadi Al-Khayer, M.D, F.A.C.E The Biological Functions of Testosterone in Men Testosterone is essential to the musculoskeletal and metabolic systems throughout a
More informationGUIDELINES ON PRIAPISM
GUIDELINES ON PRIAPISM (Text update March 2015) A. Salonia, I. Eardley, F. Giuliano, I. Moncada, K. Hatzimouratidis Eur Urol 2014 Feb;65(2):480-9 Introduction Priapism is a pathological condition representing
More informationHormones of brain-testicular axis
(Hormone Function) Hormones of brain-testicular axis anterior pituitary drives changes during puberty controlled by GnRH from hypothalamus begins to secrete FSH, LH LH targets interstitial endocrinocytes
More informationThe effect of sildenafil on electrostimulation-induced erection in the rat model
(2002) 14, 251 255 ß 2002 Nature Publishing Group All rights reserved 0955-9930/02 $25.00 www.nature.com/ijir The effect of sildenafil on electrostimulation-induced erection in the rat model N Ueno 1,
More informationHypogonadism and erectile dysfunction: an overview
Androgens and erectile dysfunction DOI: 10.1111/j.1745-7262.2008.00375.x www.asiaandro.com. Review. Hypogonadism and erectile dysfunction: an overview Nilgun Gurbuz, Elnur Mammadov, Mustafa Faruk Usta
More informationAssessment of Erectile and Ejaculatory Function after Penile Prosthesis Implantation
www.kjurology.org DOI:.4/kju.2.5.3.22 Sexual Dysfunction/Infertility Assessment of Erectile and Ejaculatory Function after Penile Prosthesis Implantation Jang Ho Bae, Phil Hyun Song, Hyun Tae Kim, Ki Hak
More informationTopical application of a Rho-kinase inhibitor in rats causes penile erection
(2004) 16, 294 298 & 2004 Nature Publishing Group All rights reserved 0955-9930/04 $30.00 www.nature.com/ijir Topical application of a Rho-kinase inhibitor in rats causes penile erection Y Dai 1,2,3, K
More informationOnset and duration of action of sildena l citrate for the treatment of erectile dysfunction
Onset and duration of action of sildena l citrate for the treatment of erectile dysfunction Ian Eardley, 1 Peter Ellis, 2 Mitradev Boolell 2 & Maria Wulff 2 1 Department of Urology, St James University
More informationASSESSMENT OF PREMATURE EJACULATION AND ERECTILE DYSFUNCTION
ASSESSMENT OF PREMATURE EJACULATION AND ERECTILE DYSFUNCTION Dr Michael Gillman St Andrews Hospital Wickham Terrace Spring Hill Mater Private Clinic, South Brisbane Shore St West Medical Centre, Cleveland
More informationNitric Oxide in the Penis: Scientific Discoveries and Clinical Applications
Nitric Oxide in the Penis: Scientific Discoveries and Clinical Applications Arthur L. (Bud) Burnett, M.D., M.B.A., F.A.C.S. Patrick C. Walsh Professor of Urology The James Buchanan Brady Urological Institute
More informationPenile Rehabilitation After Radical Prostatectomy: Important Therapy or Wishful Thinking?
MANAGEMENT UPDATE Penile Rehabilitation After Radical Prostatectomy: Important Therapy or Wishful Thinking? Joseph E. Dall Era, MD, Jesse N. Mills, MD, Hari K. Koul, MD, Randall B. Meacham, MD Division
More informationErectile dysfunction. By Anas Hindawi Supervised by Dr Khalid AL Sayyid
Erectile dysfunction By Anas Hindawi Supervised by Dr Khalid AL Sayyid ED is the persistent/recurrent inability to attain and/or maintain a penile erection rigid enough for satisfactory sexual intercourse
More informationIndex. urologic.theclinics.com. Note: Page numbers of article titles are in boldface type.
Note: Page numbers of article titles are in boldface type. A Acquired hypogonadism, prevalence of, 165 167 primary, 165 secondary, 167 Adipose tissue, as an organ, 240 241 Adrenal hyperplasia, congenital,
More informationTadalafil ameliorates metabolic syndrome induced alterations in visceral adipose tissue: an experimental study in the rabbit Mario Maggi Sexual
Tadalafil ameliorates metabolic syndrome induced alterations in visceral adipose tissue: an experimental study in the rabbit Mario Maggi Sexual Medicine and Andrology Unit Dept. Experimental and Clinical
More informationErectile dysfunction in aging male
ACTA BIOMED 2010; 81; Suppl 1: 89-94 Mattioli 1885 R E V I E W Erectile dysfunction in aging male Francesco Romanelli, Andrea Sansone, Andrea Lenzi Department of Medical Pathophysiology, Sapienza University
More informationErectile Dysfunction and the Prostate Cancer Patient
BAUN & Prostate cancer UK Erectile Dysfunction Study Day Erectile Dysfunction and the Prostate Cancer Patient Lorraine Montgomery Specialist Nurse Practitioner Urology Queen Elizabeth Hospital Gateshead
More information13-Oct-15 ERECTILE DYSFUNCTION. Urology Subdepartement dr. Mintohardjo Naval Hospital dr. Isdiyanto Septiadi, Sp.U
ERECTILE DYSFUNCTION Urology Subdepartement dr. Mintohardjo Naval Hospital dr. Isdiyanto Septiadi, Sp.U 1 2 3 So what is impotence or erectile dysfunction..? The persistent inability to achieve or maintain
More informationSidney Glina Faculdade de Medicina do ABC Instituto H. Ellis Editor-in-Chief of the International Brazilian Journal of Urology
Sidney Glina Faculdade de Medicina do ABC Instituto H. Ellis Editor-in-Chief of the International Brazilian Journal of Urology (www.intbrazjurol.com.br) glinas@terra.com.br Conflict of Interest: In the
More informationR. Charles Welliver, Jr.,* Herbert J. Wiser, Robert E. Brannigan, Kendall Feia, Manoj Monga and Tobias S. K ohler
Sexual Function/Infertility Validity of Midday Total Testosterone Levels in Older Men with Erectile Dysfunction R. Charles Welliver, Jr.,* Herbert J. Wiser, Robert E. Brannigan, Kendall Feia, Manoj Monga
More information/02/ /0 Vol. 168, , October 2002 THE JOURNAL OF UROLOGY
0022-5347/02/1684-1332/0 Vol. 168, 1332 1336, October 2002 THE JOURNAL OF UROLOGY Printed in U.S.A. Copyright 2002 by AMERICAN UROLOGICAL ASSOCIATION, INC. DOI: 10.1097/01.ju.0000028041.27703.da Original
More informationTestim 1 Gel: Review of Clinical Data
European Urology Supplements European Urology Supplements 4 (2005) 24 30 Testim 1 Gel: Review of Clinical Data Tom A. McNicholas* Department of Urology, Lister Hospital, Corey s Mill Lane, Stevenage, Hertfordshire
More informationErectile function is a complex neurovascular physiological
Journal of Andrology, Vol. 30, No. 4, July/August 2009 Copyright E American Society of Andrology Androgens Play a Pivotal Role in Maintaining Penile Tissue Architecture and Erection: A Review Review ABDULMAGED
More informationMedicines Q&As. Date prepared: November 2016
Q&A 128.3 What is the rationale and evidence for the use of phosphodiesterase-5 inhibitors as supportive therapy to rehabilitate Erectile Function after nerve sparing radical prostatectomy? Summary Prepared
More informationErectile Dysfunction (ED) Shawn McGee M.D. CentraCare Adult and Pediatric Urology January 30 th, 2016
Erectile Dysfunction (ED) Shawn McGee M.D. CentraCare Adult and Pediatric Urology January 30 th, 2016 Erectile dysfunction: The inability to attain or maintain penile erection sufficient for satisfactory
More informationSexual Health in Older Adults
Sexual Health in Older Adults Lauren Carpenter, MD UW Division of Gerontology and Geriatric Medicine VA Puget Sound Geriatrics & Extended Care Objectives > Identify barriers to addressing sexual health
More informationPenile Implant Should be Offered Early
Penile Implant Should be Offered Early Landon Trost, MD Assistant Professor in Urology Mayo Clinic, Rochester, MN SMSNA AUA May 16 th, 2015 2013 MFMER slide-1 Clear Indications for Penile Implants Men
More informationERECTILE DYSFUNCTION IN CHINESE MEDICINE 马万里. Giovanni Maciocia
ERECTILE DYSFUNCTION IN CHINESE MEDICINE 马万里 Giovanni Maciocia Repeated inability to get or keep an erection firm enough for sexual intercourse. Erectile dysfunction, or ED can be: ERECTILE DYSFUNCTION
More informationTestosterone Regulates PDE5 Expression and in vivo Responsiveness totadalafil in Rat Corpus Cavernosum
European Urology European Urology 47 (2005) 409 416 Testosterone Regulates PDE5 Expression and in vivo Responsiveness totadalafil in Rat Corpus Cavernosum Xin-hua Zhang a,1, Annamaria Morelli a,1, Michaela
More informationTestosterone Therapy in Men An update
Testosterone Therapy in Men An update SANDEEP DHINDSA Associate Professor of Medicine Director, Division of Endocrinology and Metabolism, Saint Louis University, St. Louis, MO Presenter Disclosure None
More informationBIOCHEMICAL TESTS FOR THE INVESTIGATION OF COMMON ENDOCRINE PROBLEMS IN THE MALE
Authoriser: Moya O Doherty Page 1 of 7 BIOCHEMICAL TESTS FOR THE INVESTIGATION OF COMMON ENDOCRINE PROBLEMS IN THE MALE The purpose of this protocol is to describe common tests used for the investigation
More informationTadalafil: a novel treatment for erectile dysfunction
European Heart Journal Supplements (22) 4 (Supplement H), H24 H31 Tadalafil: a novel treatment for erectile dysfunction F. Giuliano 1 and L. Varanese 2 1 Department of Urology, AP-HP, Centre Hospitalier
More informationComparison of long-acting testosterone undecanoate formulation versus testosterone enanthate on sexual function and mood in hypogonadal men
European Journal of Endocrinology (2009) 160 815 819 ISSN 0804-4643 CLINICAL STUDY Comparison of long-acting testosterone undecanoate formulation versus testosterone enanthate on sexual function and mood
More informationMale reproductive system The physiology of sexual act
Male reproductive system The physiology of sexual act Gabriella Kékesi 65. The development and physiology of the male reproductive system. The physiology of the sexual act Define chromosomal, gonadal and
More informationErectile dysfunction (ED) is the inability to obtain or maintain an erection satisfactory
Determining the Feasibility of Managing Erectile Dysfunction in Humans With Placental-Derived Stem Cells Jason A. Levy, OMS IV, MS; Melissa Marchand, PA-C; Leanne Iorio, OMS II; Walquiria Cassini; and
More informationInformation for Patients. Priapism. English
Information for Patients Priapism English Table of contents What is priapism?... 3 What causes priapism?... 3 Diagnosing priapism... 3 Treating priapism... 4 Conservative, first- and second-line treatments...
More informationOral phentolamine: an alpha-1, alpha-2 adrenergic antagonist for the treatment of erectile dysfunction
(2000) 12, Suppl 1, S75±S80 ß 2000 Macmillan Publishers Ltd All rights reserved 0955-9930/00 $15.00 www.nature.com/ijir Oral phentolamine: an alpha-1, alpha-2 adrenergic antagonist for the treatment of
More informationThe use of the simplified International Index of Erectile Function (IIEF-5) as a diagnostic tool to study the prevalence of erectile dysfunction
(2002) 14, 245 250 ß 2002 Nature Publishing Group All rights reserved 0955-9930/02 $25.00 www.nature.com/ijir The use of the simplified International Index of Erectile Function (IIEF-5) as a diagnostic
More informationHormone therapy works best when combined with radiation for locally advanced prostate cancer
Hormone therapy works best when combined with radiation for locally advanced prostate cancer Phichai Chansriwong, MD Ramathibodi Hospital, Mahidol University Introduction Introduction 1/3 of patients
More informationGUIDELINES ON. Introduction. G.R. Dohle, S. Arver, C. Bettocchi, S. Kliesch, M. Punab, W. de Ronde
GUIDELINES ON Male Hypogonadism G.R. Dohle, S. Arver,. Bettocchi, S. Kliesch, M. Punab, W. de Ronde Introduction Male hypogonadism is a clinical syndrome caused by androgen deficiency. It may adversely
More information