Abstract：
:Experimental models to study the effect of agents on penile erection usually include electrical stimulation of peripheral nerves in anesthetized animals combined with systemic or intracavernous injection of drugs. The objective of this study was to demonstrate that conscious rabbits can be used as a simple and quantitative model for the assessment of compounds that show potential for the treatment of erectile dysfunction. Erection was assessed by measuring the length of uncovered penile mucosa before and after the intravenous (i.v.) administration of agents. Animals did not require anesthesia during the course of the study. The phosphodiesterase 5 (PDE5) inhibitors vardenafil x HCl (hereafter called vardenafil) and sildenafil were given intravenously, and measurements were taken for 0-5 h. The effects of phentolamine and milrinone were also evaluated. Vardenafil (0.1-3 mg/kg) induced dose-dependent penile erections in conscious rabbits following i.v. administration. The efficacy of vardenafil was potentiated, and the minimal effective dose was reduced significantly to 0.01 mg/kg by simultaneous administration of the nitric oxide (NO) donor sodium nitroprusside (SNP). Administration of the NO-synthase inhibitor L-NAME abolished the effect. Sildenafil was effective in this model after i.v. administration. The alpha-adrenergic receptor antagonist phentolamine (0.1, 0.3 and 1 mg/kg i.v.) induced erections with a slower t(max) compared with vardenafil and sildenafil. Intravenous administration of the PDE3 inhibitor milrinone (1 mg/kg i.v.) was less effective than the PDE5 inhibitor vardenafil. The conscious rabbit is a suitable and reliable model for the evaluation of compounds with potential for the treatment of erectile dysfunction. This was demonstrated using compounds that target different signaling pathways that induce smooth muscle relaxation in the penis.
journal_name
Int J Impot Resjournal_title
International journal of impotence researchauthors
Bischoff E,Schneider Kdoi
10.1038/sj.ijir.3900703subject
Has Abstractpub_date
2001-08-01 00:00:00pages
230-5issue
4eissn
0955-9930issn
1476-5489journal_volume
13pub_type
杂志文章abstract：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...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/s41443-019-0158-3
更新日期：2019-11-01 00:00:00
abstract：:The objective was to study available evidence for ingredients of popular over-the-counter testosterone and erectile dysfunction (ED) supplements. The top 16 male testosterone and 16 ED supplements in the USA were identified from the most popular online retailers: A1 Supplements, Amazon, Vitamin Shoppe, and Walmart. In...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/s41443-020-0285-x
更新日期：2020-05-01 00:00:00
abstract：:Early pharmacological prophylaxis has been reported to increase the return of spontaneous erections following radical prostatectomy (RP). In this study, we evaluated the role of intracavernosal alprostadil (PGE1) combined with sildenafil in stimulating early recovery of spontaneous erections following RP. In this pros...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/sj.ijir.3901448
更新日期：2006-09-01 00:00:00
abstract：:Both RigiScan and the Snap Gauge band devices are used to objectively measure penile rigidity. The Snap Gauge band is the more simple and inexpensive of the two techniques. We investigated the correlation between the results obtained by both devices in order to evaluate whether the Snap Gauge band could be employed as...
journal_title：International journal of impotence research
pub_type： 临床试验,杂志文章
doi：10.1038/sj.ijir.3900438
更新日期：1999-12-01 00:00:00
abstract：:The objective of the study was to evaluate the relationship between the sexual position and severity of penile fracture (PF). We studied 90 patients with PF. The mechanism of injury and the sexual position was assessed. We divided our sample by the etiology of the fracture in six groups: (a) masturbation or penile man...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/ijir.2017.24
更新日期：2017-09-01 00:00:00
abstract：:The objective of this study was to evaluate the effect on erections of impeding venous blood flow following intracavernosal injections of prostaglandin E1. Dispersion of injected X-ray contrast medium indicated that application of the RMRI penile clamp to the base of the penis retarded venous outflow. The clamp was th...
journal_title：International journal of impotence research
pub_type： 临床试验,杂志文章,随机对照试验
doi：
更新日期：1995-03-01 00:00:00
abstract：:Chronic heart failure (HF) is an increasingly common cardiovascular disorder. The goal of health-care providers is to optimize quality of life in this population, including sexual health. Up to 75% of patients with HF report erectile dysfunction (ED). As HF is a condition with distinct physiologic sequelae, some uniqu...
journal_title：International journal of impotence research
pub_type： 杂志文章,评审
doi：10.1038/sj.ijir.3901426
更新日期：2005-12-01 00:00:00
abstract：:We have investigated the reliability of intracavernosal prostaglandin E1 (PGE1) office vs self-injection therapy in patients with erectile dysfunction (ED). A total of 298 male patients with ED were enrolled in this study. In all patients, intracavernosal titration of the PGE1 dose was performed. A total of 106 patien...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/sj.ijir.3901388
更新日期：2006-03-01 00:00:00
abstract：:At this present time there is a serious gap in our understanding of how psychological difficulties result in specific sexual dysfunction. In this paper, a theoretical model of sexual response is proposed which involves the parallel existence of excitatory and inhibitory mechanisms in the central nervous system. Eviden...
journal_title：International journal of impotence research
pub_type： 杂志文章,评审
doi：
更新日期：1998-05-01 00:00:00
abstract：:Non-surgical treatment of Peyronie's disease (PD) has come a long way since it was first described in 1743. A myriad of treatment options are currently available, including oral, intralesional and external energy therapies. The purpose of this article is to review the contemporary literature on non-surgical therapies ...
journal_title：International journal of impotence research
pub_type： 杂志文章,评审
doi：10.1038/ijir.2011.45
更新日期：2012-01-01 00:00:00
abstract：:This study was aimed to identify characteristics of ED patients who discontinued PDE5i despite successful intercourse. Data were collected using a questionnaire from 34 urologic clinics regardless of the effect (success or failure) of PDE5i treatment by visiting the clinics (717), e-mail (64) or post (101) for 882 ED ...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/ijir.2013.41
更新日期：2014-05-01 00:00:00
abstract：:The objective of this study is to investigate whether the L-arginine/nitric oxide pathway is involved in the neurotransmission of paraventricular nucleus of hypothalamus (PVN) activation-induced penile erection in the rat. Male adult Sprague-Dawley rats anesthetized with pentobarbital were used. The femoral artery was...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/sj.ijir.3900825
更新日期：2002-06-01 00:00:00
abstract：:A prospective study was done on 76 patients who underwent surgical correction by corporeal plication of the penile deformity secondary to Peyronie's disease. Nocturnal penile tumescence and rigidity were recorded by RigiScan during three consecutive nights, before and after the operation. A significant number of patie...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：
更新日期：1995-06-01 00:00:00
abstract：:The aim of our study was to describe the impact of mid-urethral sling procedure for the treatment of stress urinary incontinence (SUI) on female sexual function. We used PubMed (updated March 2015) to conduct a literature electronic search that included peer-reviewed English language articles. We analyzed the studies ...
journal_title：International journal of impotence research
pub_type： 杂志文章,评审
doi：10.1038/ijir.2016.16
更新日期：2016-07-01 00:00:00
abstract：:This prospective study determined the rate of abandonment of sildenafil therapy and assessed the reasons for abandonment. Between January 2001 and December 2002, 234 patients with erectile dysfunction (ED) at three independent centers successfully began therapy with sildenafil 50 or 100 mg. The rate of noncompliance w...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/sj.ijir.3901252
更新日期：2005-01-01 00:00:00
abstract：:Erectile dysfunction is a common condition that affects men over age 40. It is highly related to obesity. The corpus cavernosum is the most important structure involved in erection. The aim of this study was to evaluate the structure of the corpus cavernosum of mice fed with a high energy density diet (HED). At 3 mont...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/s41443-018-0089-4
更新日期：2019-03-01 00:00:00
abstract：:Chronic hypoxia is related to many pathological conditions: aging, heart and respiratory failure, sleep apneas, smoke, chronic obstructive pulmonary disease (COPD), diabetes, hypertension and arteriosclerosis, all characterized by reductions of sleep-related erections (SREs) and by erectile dysfunction (ED). Sleep-rel...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/sj.ijir.3901560
更新日期：2007-09-01 00:00:00
abstract：:New Zealand white rabbit cavernosal smooth muscle strips (n=6) were mounted in organ baths. Relaxations to nitric oxide (10(-7)-10(-4) mol/l) were measured and the same procedure was repeated on strips from rabbits 6 months after alloxan-induced diabetes (n=6). Transverse cavernosal sections were obtained from the sam...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/sj.ijir.3900935
更新日期：2002-12-01 00:00:00
abstract：:Sildenafil has had a dramatic influence on the field of sexual medicine over the past 20 years. Not only have phosphodiesterase-5 (PDE5) inhibitors improved the treatment of erectile dysfunction (ED), they have indirectly contributed to the treatment of male factor infertility. A review of the literature between 1998 ...
journal_title：International journal of impotence research
pub_type： 杂志文章,评审
doi：10.1038/s41443-018-0067-x
更新日期：2019-03-01 00:00:00
abstract：:Hard flaccid (HF) is a group of symptoms that significantly affects a man's sexual and social life. As this syndrome has only been reported in several patient forums, exact prevalence of this rare condition is unknown. Currently, no scientific literature exists of the syndrome. We, hereby, aimed to present four cases ...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/s41443-019-0133-z
更新日期：2020-03-01 00:00:00
abstract：:The sexuality and the management of benign prostatic hyperplasia (BPH) with alfuzosin (SAMBA) trial evaluated the effect of alfuzosin on sexual function in men treated for BPH using two sexual function scales: male sexual health questionnaire (MSHQ) and international index of erectile function (IIEF-15). A total of 14...
journal_title：International journal of impotence research
pub_type： 临床试验,杂志文章
doi：10.1038/ijir.2008.62
更新日期：2009-01-01 00:00:00
abstract：:Even with the help of modern pharmacology, treatment of erectile dysfunction often remains complex, and requires taking into account the social, psychological, and behavioral dimensions of the disorder. This brief report presents a case study highlighting this complexity. ...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/sj.ijir.3901322
更新日期：2005-07-01 00:00:00
abstract：:In order to assess the effectiveness of sildenafil under routine conditions of use in primary care settings and to evaluate its impact on patient's life satisfaction and partner's satisfaction with treatment for erectile dysfunction (ED), an open, multicentre, observational, prospective study was designed in which 281...
journal_title：International journal of impotence research
pub_type： 临床试验,杂志文章,多中心研究
doi：10.1038/sj.ijir.3900782
更新日期：2001-12-01 00:00:00
abstract：:We studied the association between erythrocyte aggregation (EA) and erectile dysfunction (ED) in men with coronary artery disease (CAD). Men with CAD documented by coronary angiography filled the Sexual Health Inventory for Males questionnaire to detect ED and assess its severity. EA was evaluated by filming slides of...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/ijir.2009.6
更新日期：2009-05-01 00:00:00
abstract：:To date, no effective medical approach for the treatment of erectile dysfunction (ED) secondary to ischemic priapism (IP) has been described. The aim of this study was to evaluate the anti-inflammatory, antifibrotic, and antioxidant effects of pirfenidone (PFD) on cavernosal tissue in a rat model of IP. Forty-eight ma...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/s41443-019-0152-9
更新日期：2020-03-01 00:00:00
abstract：:Creation of a neophallus in cases of loss of the penis or female to male trans-sexual is a challenge. The forearm flap is the most popular method used. A penile implant may be placed at the original procedure or at a later date to provide support for intercourse. The hydraulic nondistally expanding types provide the b...
journal_title：International journal of impotence research
pub_type： 杂志文章,评审
doi：10.1038/sj.ijir.3901087
更新日期：2003-10-01 00:00:00
abstract：:End-stage renal disease (ESRD) affects sexual function. The etiology of sexual dysfunction in ESRD is multifactorial and hypogonadism is not uncommon. In a cohort of 96 men with ESRD, scores on International Index of Erectile Function (IIEF) correlated with bioavailable testosterone (T; P<0.01). We further evaluated t...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/ijir.2009.55
更新日期：2010-03-01 00:00:00
abstract：:There is considerable interest in understanding the genetics of erectile dysfunction (ED). Since early twin studies that suggested a genetic component to ED, multiple candidate gene studies have identified genetic variants that may be associated with ED. Genome-wide association studies (GWAS) have overcome some of the...
journal_title：International journal of impotence research
pub_type： 杂志文章,评审
doi：10.1038/s41443-020-00372-w
更新日期：2020-11-10 00:00:00
abstract：:Erectile dysfunction (ED) due to androgen deficiency is rare in the young population. We retrospectively evaluated in this study men aged 18-40 years presenting with ED from 2015 to 2017. The International Index of Erectile Function-5 (IIEF-5) and Erection Hardness Grade Scores (EHGS) were used to assess erectile func...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/s41443-018-0090-y
更新日期：2019-03-01 00:00:00
abstract：:We report a rare complication of a penile prosthesis reservoir removed from the urinary bladder in a patient with a history of radiation therapy and previous abdominal surgery. The reservoir was retrieved by open cystotomy 13 years after original placement. ...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/sj.ijir.3901303
更新日期：2005-05-01 00:00:00
