Abstract：
:Tunica albuginea (TA) of the penis, which has an important role in mechanism of erection, is composed mainly of collagen bundles. Both aging and diabetes mellitus (DM) were reported to be associated with many alterations in collagen content and architecture in several body tissues. So, the aim of this work was to evaluate the effects of both conditions on the collagen bundles of penile TA in rats. Our diabetic models were three groups of Zucker Diabetic Fatty (ZDF) rats with non-insulin-dependent DM (NIDDM) aged 15, 40 and 75 weeks. Their age-matched controls were Zucker Fatty (ZF) rats. TA were excised from the side of mid-penile shaft and were examined by scanning electron microscopy using chemical digestion to extract collagen components. With aging, only the (70 w) ZF rats showed a significant increase in both thickness (P < 0.005) and loss of undulation of its bundles (P < 0.005) compared with the younger animals. In ZDF animals, a significant gradual increase in bundle thickness (P < 0.005) and loss of its undulation (P < 0.005) were found as the disease progressed to 40 w duration. Comparing these two parameters between both study groups showed that DM animals had significantly higher bundle thickness (P < 0.005) with loss of its undulation (P < 0.005) than controls starting from 40 w old. In conclusion, with progress of both aging and NIDDM, an increase in both thickness and loss of undulation of collagen bundles of penile TA was appreciated. The association of DM with aging could represent a cofactor effect that ultimately led to a greater impact on architecture of the bundles. The resulting changes may explain the compromised rigidity of the penis during erection under both conditions.
journal_name
Int J Impot Resjournal_title
International journal of impotence researchauthors
Salama N,Kagawa Sdoi
10.1038/sj.ijir.3900389subject
Has Abstractpub_date
1999-04-01 00:00:00pages
99-105issue
2eissn
0955-9930issn
1476-5489journal_volume
11pub_type
杂志文章abstract：:Unconsummated marriage (UM) is the failure to perform successful sexual intercourse at the beginning of the marriage. Vaginismus has been traditionally reported as the leading cause. ED is also a leading cause for UM. This appears to be a significant problem in the conservative middle-Eastern societies and in the deve...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/ijir.2013.24
更新日期：2014-01-01 00:00:00
abstract：:Although several studies on toxic effect of aspartame metabolite have been studied, controversial reports over the use of aspartame owing to the fact that it releases methanol as one of its metabolite during metabolism exist. This present study is proposed to investigate whether aspartame (40 mg kg-1 b.wt) administrat...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/ijir.2017.17
更新日期：2017-07-01 00:00:00
abstract：:Psoriasis is a chronic inflammatory skin disease and seems to be associated with erectile dysfunction (ED). ED is a predictor of future cardiovascular disease. It is important to identify ED early and investigate cardiovascular problems in psoriasis patients. The sample consisted of 191 psoriasis patients and 191 heal...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/ijir.2016.6
更新日期：2016-05-01 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：:Nitric oxide (NO) is an important mediator in the cavernosal smooth muscle relaxation that causes erections. The purpose of this study was to examine the existence, distribution and phosphorylation stage of two recently discovered key enzymes for NO regulation in human cavernosal tissue, the MAP Kinase 1/2 (Erk 1/2) a...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/sj.ijir.3900856
更新日期：2002-08-01 00:00:00
abstract：:The aim of the study was to determine whether any difference would occur in peak systolic velocity (PSV) and end diastolic velocity (EDV) measurements of color Doppler ultrasonography (CDU) between proximal and distal segments of the cavernous arteries obtained at different times. Twenty-six cases have undergone CDU t...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/sj.ijir.3900304
更新日期：1998-03-01 00:00:00
abstract：:Soluble guanylyl cyclase (sGC) is the major effector molecule for nitric oxide (NO) and as such an interesting therapeutic target for the treatment of erectile dysfunction. To assess the functional importance of the sGCalpha(1)beta(1) isoform in corpus cavernosum (CC) relaxation, CC from male sGCalpha(1)(-/-) and wild...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/sj.ijir.3901627
更新日期：2008-05-01 00:00:00
abstract：:We sought to establish the interplay of metabolic syndrome (MetS) and/or sexual dysfunction (SD) on hypogonadism. Sexual functioning was assessed using Golombok Rust Inventory of Sexual Satisfaction in 274 consecutive diabetic men visiting the diabetic clinic of the Tema General Hospital between November 2010 and Marc...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/ijir.2017.6
更新日期：2017-05-01 00:00:00
abstract：:Currently available agents for erectile dysfunction (ED) share the same mechanism of action and pharmacologic properties. Therefore, they share the same limitations, including a principal focus on erection as an end-organ process. One of the relatively unexplored areas of research has been the potential for centrally ...
journal_title：International journal of impotence research
pub_type： 杂志文章,评审
doi：10.1038/ijir.2008.18
更新日期：2008-07-01 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：:Penile intra-epithelial neoplasia (PeIN) is a known precursor for penile cancer. It may be undifferentiated or differentiated. The former is related to high-risk Human Papilloma Virus (HPV) and associated with p16 over-expression. Patients may present with red patches or lesions on the penis which on occasion may affe...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/s41443-020-0327-4
更新日期：2020-07-24 00:00:00
abstract：:Peyronie's disease is a common malady affecting men mostly between the ages of 40 and 60. When penile curvature and erectile softening are present and the erectile dysfunction does not respond to Viagra a penile implant will strengthen and usually straighten the penis. If curvature persists after implant placement 'mo...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/sj.ijir.3900865
更新日期：2002-10-01 00:00:00
abstract：:In March 2020, the Italian Government introduced measures to reduce the spread of COVID-19 infection. Between 8th April and 2nd May 2020 we investigated levels and correlates of sexual activity and depression during COVID-19 lockdown in a sample of hospital workers and their acquaintances by an online survey on Survey...
journal_title：International journal of impotence research
pub_type： 信件
doi：10.1038/s41443-020-00393-5
更新日期：2021-01-01 00:00:00
abstract：:Erectile dysfunction occurs frequently in humans with diabetes mellitus; the molecular basis of this phenomenon is not known. We investigated the effects of diabetes on penile erection, nitric oxide synthase and growth factors expression in an animal model. Forty male rats were divided into two groups: the experimenta...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/sj.ijir.3900392
更新日期：1999-06-01 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：:Hypogonadotropic patients may visit pediatricians, general practitioners, endocrinologists or urologists, presenting with microphallus, cryptochidism or pubertas tarda and delayed bone maturation. Congenital hypogonadotropic hypogonadism is characterized, apart from small testes, by the constellation of low serum leve...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/sj.ijir.3900493
更新日期：2000-04-01 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：:We describe a case of gunshot wound to the corpora cavernosa caused by a low-velocity bullet in a 43-year-old man. He volunteered that his lover's husband shot him with a handgun. The bullet had penetrated the right gluteal region with no exit wound causing a right corpus cavernosum lesion. A penile colour-duplex dopp...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/sj.ijir.3901472
更新日期：2006-11-01 00:00:00
abstract：:As lifelong premature ejaculation (PE) and subjective PE are two different PE subtypes, the measurement of their characteristic features requires different objective measures. In this article, we address the differences between lifelong PE and subjective PE, in terms of the extent of variation of sexual performance an...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/s41443-018-0107-6
更新日期：2019-09-01 00:00:00
abstract：:The majority of medical students and medical healthcare providers do not feel comfortable when addressing sexual problems. It was suggested that more courses in sexual health are needed at medical schools to overcome this shortcoming. To assess medical students' interest in and attitude about sexual health education a...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/ijir.2016.25
更新日期：2016-09-01 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：:The purpose of this study is to investigate and compare the effects of 5-mg once-daily tadalafil versus 5-mg alternate-day tadalafil in men with moderate-to-severe erectile dysfunction (ED) and lower urinary tract symptoms (LUTS). Between January 2012 and June 2013, 144 men presenting with an International Index of Er...
journal_title：International journal of impotence research
pub_type： 杂志文章,随机对照试验
doi：10.1038/ijir.2014.19
更新日期：2015-01-01 00:00:00
abstract：:During penile pharmacotesting, anxiety may overcome complete smooth muscle relaxation and lead to false positive diagnosis of organic male erectile dysfunction (ED). We tested the efficacy and safety of re-dosing of PGE1 alone versus combination of PGE, and the alpha1,2-blocker phentolamine (PHE) to improve an incompl...
journal_title：International journal of impotence research
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1038/sj.ijir.3900477
更新日期：2000-02-01 00:00:00
abstract：:The objective of this study was to determine the cardiovascular risk factors among men with erectile dysfunction (ED) at a hospital-based primary care clinic in Riyadh, Saudi Arabia. A cross-sectional study was conducted at a primary care clinic in the King Khalid University Hospital (Riyadh, Saudi Arabia), during the...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/ijir.2009.36
更新日期：2009-11-01 00:00:00
abstract：:This study examined the effects of a new phosphodiesterase type 5 inhibitor, DA-8159, on erectile function associated with hypercholesterolemia. First of all, in order to investigate whether chronic administration of DA-8159 prevents the development of erectile dysfunction associated with hypercholesterolemia, male SD...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/sj.ijir.3901331
更新日期：2005-09-01 00:00:00
abstract：:The single most important factor in the reduction of penile implant infections has been the infection retardant coatings. Virtually every inflatable penile prosthesis (IPP) sold for the last 15 years in America has been coated and the device infection rate has dropped over 50% to less than 1% in experienced implanter ...
journal_title：International journal of impotence research
pub_type： 杂志文章,评审
doi：10.1038/s41443-020-0338-1
更新日期：2020-08-07 00:00:00
abstract：:Several trials and reviews provide evidence for the efficacy of phosphodiesterase-5 inhibitors in the treatment of erectile dysfunction (ED). However, little is known about the impact of treatment effect modifiers other than concomitant diseases. Our objective was to identify patient and trial characteristics as well ...
journal_title：International journal of impotence research
pub_type： 杂志文章,meta分析
doi：10.1038/sj.ijir.3901479
更新日期：2006-11-01 00:00:00
abstract：:Fifty partial and non-responders (Clinical Global Impression-Sexual Function (CGI-SF) score>2), out of 76 men who completed a 6-week, double-blind, placebo-controlled trial of sildenafil treatment for serotonergic antidepressant-associated sexual dysfunction, were eligible for an additional 6-week trial of open-label ...
journal_title：International journal of impotence research
pub_type： 杂志文章,随机对照试验
doi：10.1038/sj.ijir.3901502
更新日期：2007-03-01 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：:Endothelial dysfunction, a marker for atherosclerosis and hence arterial disease, has recently been proffered as the main offender within the vascular system to predict not only the future onset of erectile dysfunction (ED) but also as the main cause of the ED. To glean more insight into whether arterial disease is in...
journal_title：International journal of impotence research
pub_type： 杂志文章
doi：10.1038/ijir.2013.17
更新日期：2013-11-01 00:00:00
