首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 203 毫秒
1.
目的通过不同方式建立大鼠血管性ED模型,并对模型结果进行验证,比较各种造模方法的有效率,并探讨模型的稳定性.方法将75只雄性SD大鼠随机分为单纯手术组(18只,双侧髂内动脉结扎)、单纯高脂组(20只,高脂饲养)、手术+高脂组(25只,双侧髂内动脉结扎,高脂饲养)、假手术组(4只,未行血管结扎术)、正常对照组(8只).术后6周,通过交配试验进行动物行为学观察,通过阿朴吗啡(APO)诱导下进行阴茎海绵体内压连续监测,记录最大勃起的海绵体内压改变,客观评价勃起功能.结果在交配试验中,手术+高脂组均没有出现交配行为(爬高、插入);单纯手术组有3例出现爬高现象,但均无插入;高脂组有8例出现爬高现象,其中2例有插入现象.海绵体测压结果显示:正常对照组(32.89±6.42)mmHg,手术+高脂组(3.21±1.20)mmHg,单纯手术组(9.62±3.87)mmHg,单纯高脂组(12.42±5.11)mmHg,假手术组(29.48±4.83)mmHg.结论手术+高脂是目前建立血管性ED的最有效方法,且模型稳定.  相似文献   

2.
高脂对兔阴茎海绵体平滑肌细胞含量及结构的影响   总被引:1,自引:0,他引:1  
目的 观察高脂诱导血管性ED家兔阴茎海绵体平滑肌细胞(smooth muscle cell, SMC)含量变化以及海绵体组织超微结构的改变情况.方法 8只性成熟雄性新西兰家兔随机分两组,每组各4只.对照组喂以正常饮食,模型组采用高脂、高胆固醇饮食结合球囊导管扩张双侧髂内动脉法建立血管性ED模型.第8周时切取阴茎海绵体组织,HE及特殊染色处理后在光镜、透射电镜下观察,计算机辅助彩色图像分析平滑肌及胶原构成百分比.RT-PCR法研究Caspase-3 mRNA的表达情况,免疫荧光法检测Caspase-3活性.结果 计算机分析表明模型组海绵体SMC含量较对照组明显减少(22.66±10.97)% vs (46.72±7.30)%,P<0.01.光镜和电镜下所见两组阴茎海绵体组织的超微结构呈显著差异.主要表现为模型组白膜结构改变,海绵体SMC明显减少,胶原成分增多.内皮细胞及SMC内存在脂质囊泡,线粒体、内质网等细胞器出现损伤,SMC凋亡小体明显增多.模型组的Caspase-3 mRNA.表达和活性值均显著高于对照组mRNA:(0.77+0.01) vs (0.68±0.01),P<0.01;活性值:(0.04±0.00) vs (0.02±0.00),P<0.05.结论 高脂、高胆固醇饮食可严重影响阴茎海绵体组织结构,主要表现为海绵体组织中SMC成分减少、胶原增加,使阴茎海绵体发生纤维化,这可能是高脂导致ED的重要原因之一.  相似文献   

3.
目的观察高脂诱导的血管性ED家兔阴茎海绵体平滑肌(Corpus Cavernosum Smooth Muscle,CCSM)细胞形态、结构变化及高脂对CCSM细胞凋亡、增殖的影响。方法雄性新西兰家兔10只,随机分为模型组和对照组,每组各5只。模型组为采用经高脂、高胆固醇饮食结合球囊导管扩张双侧髂内动脉建立、鉴定的血管性ED模型;对照组喂以正常饮食。8周后切取阴茎CCSM组织观察并做体外细胞培养。经处理后分别在光镜、透射电镜下观察,流式细胞仪检测细胞凋亡,MTT比色法观察细胞增殖活性,RT-PCR法研究Caspase-3 mRNA的表达情况,免疫荧光法检测Caspase-3活性。结果与对照组相比,模型组光镜和电镜下CCSM细胞内含较多脂质囊泡,线粒体、内质网等细胞器出现损伤,凋亡小体明显增多。流式细胞仪检测证实模型组CCSM细胞凋亡率较对照组明显增高(1.44±0.20%Vs5.96±1.60%,P<0.01)。MTT比色法显示高脂对CCSM的增殖有明显抑制作用(模型组与对照组A值分别为:0.52±0.08Vs1.42±0.04,P<0.01)。模型组的Caspase-3 mRNA表达和活性值均显著高于对照组(0.74±0.00Vs0.65±0.00,P<0.01;活性值0.03±0.00Vs0.01±0.00,P<0.05)。结论高脂、高胆固醇饮食可严重影响CCSM结构,促进CCSM细胞凋亡并抑制其增殖。CCSM细胞凋亡/增生的失衡可能是高脂导致ED发生发展的重要病理环节。  相似文献   

4.
患者男,47岁,因“骑跨伤致阴茎异常勃起伴胀痛4天余”入院;既往体健。查体:阴茎体部勃起,硬度约Ⅳ级;局部皮肤青紫,阴茎头疲软。实验室检查:活化部分凝血活酶时间45 s,尿隐血(+)。考虑阴茎异常勃起,急诊行DSA引导下阴茎海绵体造影,以Seldinger法穿刺右股动脉,经5F导管鞘先后以5F Cobra导管(Terumo)及4F Yashiro导管(Terumo)超选择插管行双侧髂内动脉造影,见右侧海绵体动脉末梢对比剂外渗,提示阴茎右侧海绵体内动脉-海绵体瘘(图1A);以Progreat微导管(Terumo,2.4F)超选择至阴茎右侧海绵体动脉远端,缓慢注入氰基丙烯酸脂0.5 ml+碘油0.5 ml进行栓塞;之后复查造影,未见对比剂外渗(图1B)。  相似文献   

5.
血管性勃起功能障碍病人阴茎血流动力学的变化   总被引:4,自引:0,他引:4  
目的分析血管性勃起功能障碍(ED)病人阴茎血流动力学的变化,提高对该病的诊断和治疗水平.方法对52例血管性ED病人分别采取海绵体内注射试验和阴茎彩色双功能超声等检查,分析其血流动力学变化.结果52例血管性ED(动脉性ED 14例,静脉性ED 26例,混合血管性ED 12例)病人在阴茎勃起的充盈、勃起、充分勃起和强直勃起期均有明显不同的血流动力学变化,表现为充盈、勃起期延长,充分勃起和强直勃起减少等.结论血管性ED会发生明显的阴茎血流动力学变化,了解该变化有助于其正确诊断和采取适当的治疗方法.  相似文献   

6.
目的: 探讨阴茎动脉畸形与原发动脉性勃起功能障碍(ED)的关系,提高对原发动脉性ED的认识与诊治水平。 方法: 报告 1例原发动脉性ED患者诊治资料。 结果: 动脉血管造影提示阴茎背动脉直径较细,而双侧阴茎海绵体动脉缺如。行阴茎三件套假体植入术,术后患者可正常勃起。 结论: 原发动脉性ED临床少见,应提高对原发动脉性ED的认识,明确诊断和治疗手段。  相似文献   

7.
实验性高脂兔体外培养阴茎海绵体平滑肌细胞凋亡的研究   总被引:1,自引:0,他引:1  
目的观察高脂诱导的血管性ED家兔阴茎海绵体平滑肌(Corpus Cavernosum Smooth Muscle,CCSM)细胞形态、结构变化及高脂对CCSM细胞凋亡、增殖的影响。方法雄性新西兰家兔10只,随机分为模型组和对照组,每组各5只。模型组为采用经高脂、高胆固醇饮食结合球囊导管扩张双侧髂内动脉建立、鉴定的血管性ED模型;对照组喂以正常饮食。8周后切取阴茎CCSM组织观察并做体外细胞培养。经处理后分别在光镜、透射电镜下观察,流式细胞仪检测细胞凋亡,MTT比色法观察细胞增殖活性,RT-PCR法研究Caspase-3 mRNA的表达情况,免疫荧光法检测Caspase-3活性。结果与对照组相比,模型组光镜和电镜下CCSM细胞内含较多脂质囊泡,线粒体、内质网等细胞器出现损伤,凋亡小体明显增多。流式细胞仪检测证实模型组CCSM细胞凋亡率较对照组明显增高(1.44&#177;0.20%Vs5.96&#177;1.60%,P〈0.01)。MTT比色法显示高脂对CCSM的增殖有明显抑制作用(模型组与对照组A值分别为:0.52&#177;0.08Vs1.42&#177;0.04,P〈0.01)。模型组的Caspase-3 mRNA表达和活性值均显著高于对照组(0.74&#177;0.00Vs0.65&#177;0.00,P〈0.01;活性值0.03&#177;0.00Vs0.01&#177;0.00,P〈0.05)。结论高脂、高胆固醇饮食可严重影响CCSM结构,促进CCSM细胞凋亡并抑制其增殖。CCSM细胞凋亡/增生的失衡可能是高脂导致ED发生发展的重要病理环节。  相似文献   

8.
彩色多普勒超声检查在血管性勃起功能障碍诊断中的应用   总被引:9,自引:5,他引:4  
目的 :探讨多普勒超声检查在诊断血管性勃起功能障碍 (ED)的临床价值。 方法 :应用多普勒超声检查阴茎药物诱导勃起前后的血液动力学改变 ,将非血管性ED病人与明确诊断血管性ED病人的多普勒超声变化进行对比 ,寻找血管性ED的特征。 结果 :动脉性ED病人深动脉的最大血流速度 (PSV)明显小于正常组 (P <0 .0 1) ;静脉性ED病人在阴茎完全勃起后背深静脉血流 (VV)仍大于对照组 (P <0 .0 5 )。 结论 :配合药物诱导阴茎勃起 ,多普勒超声检查是临床上筛选血管性ED的有效手段  相似文献   

9.
目的 应用彩色多普勒超声血流显像(CDFI)技术探讨动脉在糖尿病性勃起功能障碍(ED)中的作用.方法 23例糖尿病性ED患者和30例非糖尿病ED患者经阴茎海绵体注射前列地尔注射液(主要成分为PGE1)10 μg诱导勃起后,行CDFI检查双侧海绵体动脉血流动力学指标,包括收缩期最大流速(PSV)、舒张末期流速(EDV)、阻力指数(RI)及内径(R).结果 PSV和R这两项指标在糖尿病性ED和非糖尿病ED患者中存在差异具有统计学意义,EDV和RI在两组患者中的差异没有统计学意义.糖尿病性ED患者中的动脉性ED明显多于非糖尿病性ED.结论 动脉供血不足在糖尿病性勃起功能障碍发病机制中起着重要作用.阴茎海绵体注射血管活性药物后CDFI对血管性ED检查是一种微创而准确的方法.  相似文献   

10.
目的 探讨动脉外伤性勃起功能障碍的诊断和治疗。方法  4例骨盆骨折外伤引起阴茎动脉供血受损所致ED ,阴茎海绵体血管活性药物注射后仅见阴茎轻度胀大 ,球海绵体肌反射试验正常。并行药物性阴茎多谱勒超声检查 (PPDU)和药物性阴部内动脉造影检查 (IPA) ,其中 3例行腹壁下动脉和阴茎背浅动脉吻合术。结果 术前PPDU和IPA显示 ,1例双侧海绵体动脉及血流均未显示 ,左侧阴部内动脉和右侧阴茎动脉主干断裂 ,2例双侧海绵体动脉血管均低于正常 ,双侧阴部内动脉及阴茎动脉主干未显示明显异常。 1例右侧海绵体动脉血流正常 ,左侧海绵体动脉血流明显低于正常 ,左右海绵体动脉近端有交通枝 ,左侧阴茎动脉主干断裂。 3例手术后随访 ,1例完全恢复正常自然勃起 ,2例阴茎海绵体血管活性药物注射后阴茎达正常勃起。结论 骨盆骨折可造成阴茎勃起血供受损 ,阴茎动脉旁路手术为一有可能达到永久治愈单纯动脉外伤性勃起障碍的方法  相似文献   

11.
An animal model was developed to study the pathophysiology of erectile dysfunction due to atherosclerotic vascular disease. Thirty one New Zealand white male rabbits were divided into control (n = 5) and treatment groups (n = 26). The control group was placed on a regular diet while the treatment group underwent balloon de-endothelialization of the aorto-iliac arteries and received 1.6% cholesterol and 4% triglyceride diet for eight weeks. After eight weeks in the control animals (n = 5), blood levels of cholesterol, triglycerides and low density lipoproteins, radiologic studies as well as hemodynamic parameters of erectile function were all normal. In the surviving treatment animals (n = 21) after the same time period, a significant increase in blood levels of cholesterol, triglyceride and low density lipoprotein were observed. In addition, 62% of these animals developed hypertension which was not observed in the control group. Angiographically, 10 animals (48%) demonstrated severe atherosclerotic lesions (75% to 100% occlusion of common or internal iliac arteries on one side and over 50% occlusion of the opposite side), five (24%) had moderate lesions (50 to 75% luminal occlusion of right and left common iliac or internal iliac arteries) and 6 revealed minimal lesions (less than 50% occlusion of the right and left common iliac or internal iliac arteries). Of the 15 animals with 50% or greater luminal occlusion of the iliohypogastric arteries, erectile dysfunction was found in 93% of cases. Due to the development of erectile dysfunction in 33% of animals with minimal occlusive lesions, it appears that factors, other than large vessel luminal occlusion, may exist in this animal model which adversely influence erectile function. This model may therefore be of further benefit in the study of other factors associated with atherosclerosis and impotence, such as the possible concomitant hypercholesterolemic and atherosclerotic-induced alterations in the local reactivity of corpus cavernosum smooth muscle and lacunar space endothelial cells.  相似文献   

12.
Aim: To establish the animal model of atherosclerotic erectile dysfunction (ED) induced by high cholesterol diet and explore the mechanism of atherosclerotic ED. Methods: Thirty male rabbits were divided at random into two groups: the normal diet (ND)group (n=10) and the high cholesterol (HCH) group fed with 1.5% cholesterol diet (n=20). Serum total cholesterol, plaque areas of the ascending aorta,  相似文献   

13.
Although rats have been widely used in evaluating various causes of vasculogenic erectile dysfunction (VED), the atherosclerotic rat model has seldom been tried probably due to its inherent tolerance to a cholesterol diet. To enhance endothelial sensitivity to cholesterol diet, we tested the effects of transient interruption of nitric oxide synthase on atherogenesis induced by cholesterol diet in a rat model. Rats with atherosclerosis (AS group) received 1% cholesterol diet for 6 weeks. During the initial 2 weeks, they drank water that contained N(G)-nitro-L-arginine methyl ester (L-NAME) (3 mg/ml). After 6 weeks, we carried out histologic and hemodynamic evaluation to confirm pelvic atherosclerosis and erectile dysfunction, respectively, and the results were compared with those of cholesterol only (Chol) group and normal control (C) group. Compared to the C or Chol group, the mean intima/media (I/M) of the internal pudendal artery, which contributes approximately 70% of the total resistance of the penile vasculature, was markedly increased by the treatment (1.82+/-0.25 vs 0.77+/-0.13, P<0.05). Correspondingly, significantly diminished erectile function was observed. Combined treatment for 2 weeks elicited early atherosclerotic changes in proximal arteries and erectile impairment and further 4 weeks of cholesterol diet spread overt atherosclerosis to the periphery. The Chol group showed no arterial pathology, although they showed mild VED. A correlation study showed that atherosclerosis of the distal artery was better correlated with erectile dysfunction than the proximal artery. Based on these results, our study demonstrates that combination treatment of cholesterol diet with L-NAME would be used as a rapid, effective protocol of developing atherosclerotic rat model of VED.  相似文献   

14.
Five impotent men underwent internal iliac artery revascularization in conjunction with end-to-side aortobifemoral bypass after preoperative testing suggested a vasculogenic cause for impotence. All patients had abnormal preoperative penile/brachial arterial pressure indices (mean, 0.42 +/- 0.12). Following operation, all patients regained erectile capability and had normal postoperative penile/brachial indices (mean, 0.80 +/- 0.06). One patient developed retrograde ejaculation, emphasizing the need for meticulous nerve-sparing dissection with this operation. Internal iliac artery revascularization in conjunction with end-to-side aortobifemoral bypass is effective in relieving vasculogenic impotence in properly selected patients.  相似文献   

15.
Traumatic arteriogenic erectile dysfunction: a rat model   总被引:7,自引:0,他引:7  
We developed a rat model of traumatic arteriogenic erectile dysfunction (ED) for the study of vasculogenic ED. Bilateral ligation of the internal iliac artery was performed on 30 three-month old male Sprague-Dawley rats as an experimental group. The control group consisted of 12 rats which underwent dissection of the internal iliac artery without ligation. Before their euthanization at 3 days, 7 days, and 1 month (10 rats in the experimental group and four rats in the control group at each time point), erectile function was assessed by electrostimulation of the cavernous nerves. Penile tissues were collected for nicotinamide adenine dinucleotide phosphate (NADPH) diaphorase staining, trichrome staining, electron microscopy and RT-PCR for transforming growth factor beta (TGF-beta1), insulin like growth factor-I (IGF-I) and fibroblast growth factors (FGF) mRNA expression. Electrostimulation of the cavernous nerves revealed a highly significant declining of the intracavernous pressure after 3 and 7 days. No significant recovery of erectile function was noted at 1 month. Histology showed degeneration of the dorsal nerve fibers in all experimental rats. There was little decrease in the bulk of intracavernous smooth muscle in the experimental rats euthanazed 7 and 30 days. NADPH diaphorase staining revealed a significant decrease in nitric oxide synthase (NOS) containing nerve fibers in the dorsal and intracavernosal nerves in all rats in the experimental group. Electron microscopy showed a variety of changes such as collapse of sinusoids, increased cell debris, fibroblast and myofibroblast loss, intracellular deposition of fat and collagen and fatty degeneration. RT-PCR revealed up-regulation of TGF-beta1 after 3 days but not after 7 days or 1 month. There is no significant difference in IGF-I or FGF expression between the experimental and control group. Bilateral ligation of internal iliac arteries produces a reliable animal model for traumatic arteriogenic ED. Further studies are needed to investigate the molecular mechanism of ED in this model.  相似文献   

16.
目的探讨夜间生物电阻抗容积测定(NEVA)在诊断血管性勃起功能障碍(ED)中的临床应用价值。方法对临床怀疑血管性ED的58例患者进行NEVA测定,其结果与阴茎海绵体造影联合彩超的诊断结果进行比较,从而了解NEVA在诊断血管性ED中的临床应用价值.结果58例患者中确诊血管性ED的患者有30人,其中18名为动脉性ED,12名为静脉性ED,非血管性ED的患者有28人。应用NEVA发现在30名血管性ED的患者中有6名NPT正常,在28名非血管性ED的患者中有4名NPT有异常。NEVA对血管性ED诊断的敏感度为80%,特异度为85.71%,准确度为82.76%。在非血管组、动脉组、静脉组中有统计学差异的NEVA参数为:每晚勃起次数、勃起持续时间、血容量改变、横截面改变。结论NEVA对临床上怀疑血管性ED的诊断有参考价值。  相似文献   

17.
目的 :采用高含量胆固醇建立动脉粥样硬化性阴茎勃起功能障碍 (ED)动物模型并探讨其诱发ED机制。 方法 :30只雄性新西兰大白兔 ,随机分为 2组 :普通饲料 (ND)组 1 0只 ,喂以普通饲料 ;高胆固醇组 2 0只 ,喂以含 1 .5 %胆固醇的饲料。处理 1 2周后观测血脂水平、升主动脉斑块和阴茎勃起情况 ,测定阴部内动脉内膜 /中膜厚度比值 ,以及RT PCR法检测阴部内动脉中血管细胞粘附分子 (VCAM 1 )mRNA表达水平。 结果 :实验过程中共有 5只新西兰大白兔死亡 ,高胆固醇组 3只 ,对照组 2只。喂饲含 1 .5 %胆固醇饲料的新西兰大白兔 1 2周后均出现高脂血症 ,其中 9只发生典型的动脉粥样硬化 (为ATH组 ) ,动脉粥样硬化诱导成功率为 5 2 .9%。ATH组和HCH组 (喂饲高胆固醇但未发生典型动脉粥样硬化者 )TC、TG、AI均显著高于ND组 (P <0 .0 1 )。ATH和HCH组新西兰大白兔阴茎勃起率及阴茎勃起次数均明显降低 ,其中尤以ATH组降低更显著 (P <0 .0 1 )。ATH组阴部内动脉内膜 /中膜厚度比值和VCAM 1mRNA表达水平显著高于HCH和ND组 (P <0 .0 1 )。 结论 :采用高含量胆固醇喂饲新西兰大白兔建立ED动物模型较为简便、可行可靠。高胆固醇血症可能通过VCAM 1损害动脉内皮细胞功能 ,造成动脉内膜增厚、管腔狭窄等所致的阴茎供血不足  相似文献   

18.
There is a growing body of evidence to support the direct link between obstructive bladder dysfunction and erectile dysfunction (ED). However, there have been few pathophysiological studies to determine the relationship between lower urinary tract syndrome (LUTS) and ED. As the transforming growth factor-β1 (TGF-β1) that induces the synthesis of collagen in the penile tissues is critical for the development of ED, the first aim of this study was to investigate the expression of TGF-β1 in the penis from male rabbits with chronic partial bladder outlet obstruction (PBOO). Besides, it has been suggested that oxidative stress plays a significant role in the pathophysiological mechanism of ED. Thus, the second aim of this study was to further investigate whether the urinary or serum oxidative stress markers are involved in chronic PBOO-induced penile dysfunction. A total of 16 male New Zealand White rabbits were separated equally into four groups: a control group and PBOO groups obstructed for 2, 4 and 8 weeks respectively. Using the RT-PCR and Western blot analysis, a progressive increase of TGF-β1 in penis was found at 2, 4 and 8 weeks after obstruction. Moreover, the biomarkers for oxidative stress or oxidative damage were significantly detected in the penis of rabbits after PBOO, which include the enhancement of 8-hydroxy-2'-deoxyguanosine (8-OHdG) in urine and plasma, plasma malondialdehyde (MDA) and total antioxidant capacity (TAC), as well as reduction of glutathione (GSH). On the basis of our results, the increase of TGF-β1 and elevated systemic oxidative stress may play key roles to contribute to penile dysfunction after chronic PBOO.  相似文献   

19.
The standard surgical treatment of vasculogenic impotence or hip claudication involves repairing vascular lesions, especially in the internal iliac arteries. It is difficult, however, to make a definite diagnosis or an accurate judgement of the therapeutic effects of this treatment due to the trouble in ruling out any other disorders. During the last five years, 19 patients with impotence and associated apparent internal iliac artery stenosis or occlusion and 2 patients with hip claudication, underwent internal iliac arterial reconstruction. The patients’ ages ranged from 37 to 70 with a mean age of 63.7 and the main procedure performed in all patients was aorto-iliac to femoral bypass grafting, or abdominal aortic aneurysmectomy. A retrospective study revealed that 74 per cent of those treated regained penile erectile activity postoperatively, and that hip claudication disappeared completely in all cases. One of the patients received percutaneous transluminal angioplasty (PTA) for the treatment of vasculogenic impotence, after which his postoperative penile brachial pressure index (PBPI) improved, demonstrating a statistically significant difference compared to the preoperative value. Trans-anal Doppler measurement also proved useful in providing complication-free perioperative understanding of pelvic circulation.  相似文献   

20.
目的评估国产线性低能冲击波设备(E100)治疗勃起功能障(ED)的安全性和有效性。方法本研究为一多中心、随机双盲对照研究。病史、国际勃起功能评分(IIEF-6)及夜间阴茎勃起监测确诊的ED患者,按照2︰1的顺序随机分为治疗组及对照组,接受低能冲击波治疗每周1次,共4周,能量0.09mJ/mm2;分4个部位,每部位冲击900次,共3600次,对照组在探头内置铁片阻挡冲击波输出,其余与治疗组完全相同。治疗结束后12周随访,内容包括IIEF-6及夜间阴茎勃起监测。结果治疗组40例中的35例,对照组20例中的16例完成治疗及随访。治疗组与对照组在基线年龄、身高、IIEF-6等均无显著差异;治疗组IIEF-6随访结果显著优于对照组(17.60±6.18 vs.14.00±6.13);治疗组有效率显著高于对照组(68.6%vs.12.5%)。两组均无副作用报告。结论国产低能冲击波设备(E100)治疗勃起功能障碍安全、有效。  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号