磷酸二酯酶5在心力衰竭中作用的研究进展

磷酸二酯酶5(PDE5)是环磷酸鸟苷(cGMP)特异性水解酶,是由一氧化氮(NO)激活的可溶性鸟苷酸环化酶(sGC)靶向cGMP产生的。PDE5催化cGMP中磷酸二酯键的水解,从而将cGMP转化为无活性的5′-GMP形式,cGMP-PKG轴功能障碍将引起心脏重塑,是心力衰竭(HF)的主要原因之一。但PDE5抑制剂治疗心力衰竭的临床疗效存在争议。本文总结了近年来PDE5在心力衰竭中的作用机制和研究进展,对未来临床应用PDE5靶向治疗心力衰竭具有重要的指导意义。

Effects of phosphodiesterase 5 inhibitors on sperm parameters and fertilizing capacity

The aim of this review study is to elucidate the effects that phosphodiesterase 5 （PDE5） inhibitors exert on spermatozoa motility, capacitation process and on their ability to fertilize the oocyte. Second messenger systems such as the cAMP/adenylate cyclase （AC） system and the cGMP/guanylate cyclase （GC） system appear to regulate sperm functions. Increased levels of intracytosolic cAMP result in an enhancement of sperm motility and viability. The stimulation of GC by low doses of nitric oxide （NO） leads to an improvement or maintenance of sperm motility, whereas higher concentrations have an adverse effect on sperm parameters. Several in vivo and in vitro studies have been carried out in order to examine whether PDE5 inhibitors affect positively or negatively sperm parameters and sperm fertilizing capacity. The results of these studies are controversial. Some of these studies demonstrate no significant effects of PDE5 inhibitors on the motility, viability, and morphology of spermatozoa collected from men that have been treated with PDE5 inhibitors. On the other hand, several studies demonstrate a positive effect of PDE5 inhibitors on sperm motility both in vivo and in vitro. In vitro studies of sildenafil citrate demonstrate a stimulatory effect on sperm motility with an increase in intracellular cAMP suggesting an inhibitory action of sildenafil citrate on a PDE isoform other than the PDE5. On the other hand, tadalafil＇s actions appear to be associated with the inhibitory effect of this compound on PDE11. In vivo studies in men treated with vardenafil in a daily basis demonstrated a significantly larger total number of spermatozoa per ejaculate, quantitative sperm motility, and qualitative sperm motility; it has been suggested that vardenafil administration enhances the secretory function of the prostate and subsequently increases the qualitative and quantitative motility of spermatozoa. The effect that PDE5 inhibitors exert on sperm parameters may lead to the improvement of the outcome of assisted reproductive technology （ART） programs. In the future PDE5 inhibitors might serve as adjunct therapeutical agents for the alleviation of male infertility.

Diabetic nephropathy:Treatment with phosphodiesterase type 5 inhibitors

The importance of nitric oxide(NO) in vascular physiology is irrefutable;it stimulates the intracellular production of cyclic guanosine monophosphate(cGMP),initiating vascular smooth muscle relaxation.This biochemical process increases the diameter of small arteries,regulating blood flow distribution between arterioles and the microvasculature.The kidney is no exception,since NO predominantly dilates the glomerular afferent arterioles.It is now evident that the vascular production of cGMP can be augmented by inhibitors of phosphodiesterase type 5(PDE 5),the enzyme which breakdowns this cyclic nucleotide.This has clinical relevance,since diabetic nephropathy(DN) a major microvascular complication of diabetes mellitus and the most common cause of end-stage renal disease,increases intraglomerular capillary pressure,leading to glomerular hypertension.PDE 5 inhibitors may have,therefore,the potential to reduce glomerular hypertension.This review describes the use of PDE 5 inhibitors to improve the metabolic,haemodynamic and inflammatory pathways/responses,all of which are dysfunctional in DN.

Effect of Icariin on Cyclic GMP Levels and on the mRNA Expression of cGMP-binding cGMP-specific Phosphodiesterase (PDE5) in Penile Cavernosum

Summary： To further investigate the mechanisms of action of icariin （ICA）, we assessed the effects of ICA on the in vitro formation of cGMP and cAMP in isolated rabbit corpus cavernosum. Isolated segments of rabbit corpus cavernosum were exposed to increasing concentrations of ICA and the dose-dependent accumulation of cGMP and cAMP was determined in the tissues samples by means of ^125I radioimmunoassay. Responses of the isolated tissues preparations to ICA were compared with those obtained with the reference compounds sildenafil （Sild）. Furthermore, the effects of ICA on the mRNA expression of specific cGMP-binding phosphodiesterase type Ⅴ （PDE5） in rat penis were also observed. After incubation with ICA for 6 h or 14 h respectively, the levels of PDE5 mRNA were examined by reverse transcriptase polymerase chain reaction （RT-PCR）. The results showed that ICA increased cGMP concentrations directly （P〈0.05）, but there was no significant effect on cAMP concentrations （P〉0.05）. In the presence of sodium nitroprusside （SNP）, a stimulatory agent of cGMP, both ICA and Sild increased cGMP concentrations with increasing dose （P〈0.01）. Their EC50 was 4.62 （ICA） and 0.42 （Sild） μmol/L respectively. Under the same condition, ICA and Sild unaltered cAMP level significantly （P〉0.05）. There were PDE5A 1 and PDE5A2 mRNA expressions in rat cor- pus cavernosum with PDE5A2 being the dominant isoform. ICA could obviously inhibit these two isoforms mRNA expression in rat penis, and decrease PDE5A1 more pronouncedly （P〈 0.01）. The present study indicated that the aphrodisiac mechanisms of icariin involved the NO-cGMP signal transduction pathway, with increasing cGMP levels in the corpus cavernosum smooth muscle. The inhibitory effect of icariin on PDE5 mRNA expression, especially on PDE5A1, might account for its molecular mechanisms for its long-term activity.

Erectile potentials of a new phosphodiesterase type 5 inhibitor, DA-8159, in diet-induced obese rats

Aim： To examine the changes in the erectile function in diet-induced obese rats and investigate the oral efficacy of DA-8159, a new phosphodiesterase type 5 （PDE5） inhibitor, on penile erection in obese rats. Methods： The rats were fed a high-energy diet for 12 weeks and divided into three groups： an obesity-resistant （OR） control group, an obesity-prone （OP） control group, and an OP-DA-8159 treatment （DA-8159） group. The electrostimulation-induced erectile responses were measured in all groups. The body weight, plasma cholesterol, triglyceride and glucose levels were also measured. Results： In the OP control group, the maximum intracavernous pressure （ICP） and ICP/blood pressure （ICP/BP） ratio after electric stimulation were significantly lower than those in OR control group. The corresponding area under the curve （AUC） of the ICP/BP ratio, the detumescence time and the baseline cavernous pressure were also lower than those in the OR control group, but this difference was not significant. The body weight gain, plasma cholesterol and triglyceride level in the OP group were significantly higher than those in the OR group. After administering the DA-8159, a significant increase in the maximum ICP and the ICP/BP ratio were observed. The corresponding AUCs in the DA-8159 group were also higher than those in the two control groups. Furthermore, the detumescence time was significantly prolonged after treatment with DA-8159. Conclusion： These results demon- strate that diet-induced obesity affects the erectile function in rats and these erectile dysfunction （ED） can be improved by the treatment with DA-8159, indicating DA-8159 might be a treatment option for ED associated with obesity.

Incidence rate of prostate cancer in men treated for erectile dysfunction with phosphodiesterase type 5 inhibitors： retrospective analysis

The purpose of this study was to determine the incidence rate of prostate cancer among men with erectile dysfunction （ED） treated with phosphodiesterase type 5 inhibitors （PDE-5i） over a 7-year period vs. men with ED of the same age and with similar risk factors who were not treated with PDE-5i. In a retrospective review of electronic medical records and billing databases between the years 2000 and 2006, men with ED between the ages of 50 and 69 years and no history of prostate cancer prior to 2000 were identified. These individuals were divided into two groups： 2362 men who had treatment with PDE-5i, and 2612 men who did not have treatment. Demographic data in each group were compared. During the study period, 97 （4.1%） men with ED treated with PDE-5i were diagnosed with prostate cancer compared with 258 （9.9%） men with ED in the non-treated group （P〈00001）. A higher percentage of African Americans were treated with PDE-5i vs. those who were not （10.5% vs. 7.1%; P〈O.O001）. The PDE-5i group had lower documented diagnosis of elevated prostate-specific antigen （10.0% vs. 13.1%; P=-0.0008） and higher percentage of benign prostatic hyperplasia （38.4% vs. 35.1%; P=0.0149）. Men with ED treated with PDE-5i tended to have less chance （adjusted odds ratio： 0.4; 95% confidence intervals： 0.3-0.5; P〈0.0001） of having prostate cancer. Our data suggest that men with ED treated with PDE-5i tended to have less of a chance of beine diaenosed with orostate cancer. Further research is warranted.

Evaluation and diagnostic testing of erectile dysfunction in the era of phosphodiesterase type 5 inhibitors

The diagnosis and treatment of erectile dysfunction has changed dramatically since the availability of safe and effective oral therapies. Unfortunately, not all men can be adequately treated in this way, and might require more invasive testing to diagnose and treat the specific cause of their dysfunction. This review looks at the tests and strategies available for men who cannot be treated by oral therapy alone.

Beneficial long term effect of a phosphodiesterase-5-inhibitor in cirrhotic portal hypertension:A case report with 8 years follow-up

Non-selective beta-blockers are the mainstay of medical therapy for portal hypertension in liver cirrhosis. Inhibitors of phosphodiesterase-5(PDE-5-inhibitors) reduce portal pressure in the acute setting by > 10% which may suggest a long-term beneficial effect. Currently, there is no available data on long-term treatment of portal hypertension with PDE-5-inhibitors. This case of a patient with liver cirrhosis secondary to autoimmune liver disease with episodes of bleeding from esophageal varices is the first documented case in which a treatment with a PDE-5-inhibitor for eight years was monitored. In the acute setting, the PDE-5-inhibitor Vardenafil lowered portal pressure by 13%. The portal blood flow increased by 28% based onDoppler sonography and by 16% using MRI technique. As maintenance medication the PDE-5-inhibitor Tadalafil was used for eight consecutive years with comparable effects on portal pressure and portal blood flow. There were no recurrence of bleeding and no formation of new varices. Influencing the NO-pathway by the use of PDE-5 inhibitors may have long-term beneficial effects in compensated cirrhosis.

Analysis of the nitric oxide-cyclic guanosine monophosphate pathway in experimental liver cirrhosis suggests phosphodiesterase-5 as potential target to treat portal hypertension

AIM To investigate the potential effect of inhibitors of phosphodiesterase-5(PDE-5) for therapy of portal hypertension in liver cirrhosis.METHODS In the rat model of thioacetamide-induced liver fibrosis/cirrhosis the nitric oxide-cyclic guanosine monophosphate(NO-cGMP) pathway was investigated. Expression and localization of PDE-5, the enzyme that converts vasodilating cGMP into inactive 5'-GMP, was in the focus of the study. Hepatic gene expression of key components of the NO-cGMP pathway was determined by qRT-PCR: Endothelial NO synthase(eNOS), inducible NO synthase(iNOS), soluble guanylate cyclase subunits α1 and β1(sGCa1, sGCb1), and PDE-5. Hepatic PDE-5 protein expression and localization were detected by immunohistochemistry. Serum cGMP concentrations were measured using ELISA. Acute effects of the PDE-5 inhibitor Sildenafil(0.1 mg/kg or 1.0 mg/kg) on portal and systemic hemodynamics were investigated using pressure transducers.RESULTS Hepatic gene expression of eNOS(2.2-fold; P = 0.003), sGCa1(1.7-fold; P = 0.003), sGCb1(3.0-fold; P = 0.003), and PDE-5(11-fold; P = 0.003) was increased in cirrhotic livers compared to healthy livers. Overexpression of PDE-5(7.7-fold; P = 0.006) was less pronounced in fibrotic livers. iNOS expression was only detected in fibrotic and cirrhotic livers. In healthy liver, PDE-5 protein was localized primarily in zone 3 hepatocytes and to a lesser extent in perisinusoidal cells. This zonation was disturbed in cirrhosis: PDE-5 protein expression in perisinusoidal cells was induced approximately 8-fold. In addition, PDE-5-expressing cells were also found in fibrous septa. Serum cGMP concentrations were reduced in rats with cirrhotic livers by approximately 40%. Inhibition of PDE-5 by Sildenafil caused a significant increase in serum cGMP concentrations [+ 64% in healthy rats(P = 0.024), + 85% in cirrhotic rats(P = 0.018)]. Concomitantly, the portal venous pressure was reduced by 19% in rats with liver cirrhosis. CONCLUSION Overexpression and abrogated zonation of PDE-5 likely contribute to the pathogenesis of cirrhotic portal hypertension. PDE-5 inhibition may therefore be a reasonable therapeutic approach for portal hypertension.

Are phosphodiesterase type 5 inhibitors effective for the management of lower urinary symptoms suggestive of benign prostatic hyperplasia?

AIM: To review the efficacy of phosphodiesterase type 5 inhibitors(PDE5-Is) in lower urinary tract symptoms(LUTS) suggestive of benign prostate hyperplasia(LUTS/BPH). METHODS: A comprehensive research was conducted to identify all publications relating to benign prostate hyperplasia and treatment with sildenafil, vardenafil and tadalafil. To assess the efficacy, the changes in total international prostate symptom score(IPSS), IPSS subscore including voiding, storage and quality of life(Qo L), Benign prostatic hyperplasia Impact Index(BII), maximum urinary flow rate(Qmax) and the International Index of Erectile Function(IIEF) were extracted. A meta-analytical technique was used for the analysis of integrated data from the included studies to evaluate the mean difference in the results. RESULTS: Total IPSS score, IIEF and BII showed a significant improvement in trials in which LUTS/BPH with or without erectile dysfunction(ED) were compared with the placebo. For LUTS/BPH, the mean differences of total IPSS score, IIEF and BII are-2.17, 4.88 and-0.43, P < 0.00001, respectively. For LUTS/BPH with comorbid ED, the mean difference are-1.97, 4.54 and-0.52, P < 0.00001, respectively. PDE5-Is appear to improve IPSS storage, voiding and Qo L subscore(mean difference =-0.71,-1.23 and-0.33, P < 0.00001, respectively). Although four doses of tadalafil(2.5, 5, 10 and 20 mg) failed to reach significance in Qmax(mean difference = 0.22, P = 0.10), the 5 mg dose of tadalafil significantly improved the Qmax(mean difference = 0.33, P = 0.03).CONCLUSION: PED5-Is demonstrated efficacy for improving LUTS in BPH patients with or without ED and could be considered to be the first line treatment for LUTS/BPH.

Statin, testosterone and phosphodiesterase 5-inhibitor treatments and age related mortality in diabetes

AIMTo determine how statins, testosterone (T) replacement therapy (TRT) and phosphodiesterase 5-inhibitors (PDE5I) influence age related mortality in diabetic men.METHODSWe studied 857 diabetic men screened for the BLAST study, stratifying them (mean follow-up = 3.8 years) into: (1) Normal T levels/untreated (total T > 12 nmol/L and free T > 0.25 nmol/L), Low T/untreated and Low T/treated; (2) PDE5I/untreated and PDE5I/treated; and (3) statin/untreated and statin/treated groups. The relationship between age and mortality, alone and with T/TRT, statin and PDE5I treatment was studied using logistic regression. Mortality probability and 95%CI were calculated from the above models for each individual.RESULTSAge was associated with mortality (logistic regression, OR = 1.10, 95%CI: 1.08-1.13, P < 0.001). With all factors included, age (OR = 1.08, 95%CI: 1.06-1.11, P < 0.001), Low T/treated (OR = 0.38, 95%CI: 0.15-0.92, P = 0.033), PDE5I/treated (OR = 0.17, 95%CI: 0.053-0.56, P = 0.004) and statin/treated (OR = 0.59, 95%CI: 0.36-0.97, P = 0.038) were associated with lower mortality. Age related mortality was as described by Gompertz, r2 = 0.881 when Ln (mortality) was plotted against age. The probability of mortality and 95%CI (from logistic regression) of individuals, treated/untreated with the drugs, alone and in combination was plotted against age. Overlap of 95%CI lines was evident with statins and TRT. No overlap was evident with PDE5I alone and with statins and TRT, this suggesting a change in the relationship between age and mortality.CONCLUSIONWe show that statins, PDE5I and TRT reduce mortality in diabetes. PDE5I, alone and with the other treatments significantly alter age related mortality in diabetic men.

Erectile potentials of a new phosphodiesterase type 5 inhibitor,DA-8159,in diet-induced obese rats

Aim:To examine the changes in the erectile function in diet-induced obese rats and investigate the oral efficacy of DA-8159,a new phosphodiesterase type 5(PDE5)inhibitor,on penile erection in obese rats.Methods:The rats were fed a high-energy diet for 12 weeks and divided into three groups:an obesity-resistant(OR)control group,an obesity- prone(OP)control group,and an OP-DA-8159 treatment(DA-8159)group.The electrostimulation-induced erectile responses were measured in all groups.The body weight,plasma cholesterol,triglyceride and glucose levels were also measured.Results:In the OP control group,the maximum intracavernous pressure(ICP)and ICP/blood pressure(ICP/BP)ratio after electric stimulation were significantly lower than those in OR control group.The corresponding area under the curve(AUC)of the ICP/BP ratio,the detumescence time and the baseline cavernous pressure were also lower than those in the OR control group,but this difference was not significant.The body weight gain,plasma cholesterol and triglyceride level in the OP group were significantly higher than those in the OR group. After administering the DA-8159,a significant increase in the maximum ICP and the ICP/BP ratio were observed.The coerrsponding AUCs in the DA-8159 group were also higher than those in the two control groups.Furthermore,the detumescence time was significantly prolonged after treatment with DA-8159.Conclusion:These results demon- strate that diet-induced obesity affects the erectile function in rats and these erectile dysfunction(ED)can be im- proved by the treatment with DA-8159,indicating DA-8159 might be a treatment option for ED associated with obesity.

Value of phosphodiesterase 5 inhibitors as a combination therapy for treating erectile dysfunction:A literature review

Erectile dysfunction(ED)is increasing in prevalence,with estimates that 50%of men between 40 and 70 years of age suffer from the disease.Due to a wide array of available medical interventions,significant focus has been put on combination therapies that can treat ED refractory to first-line treatments such as phosphodiesterase 5 inhibitors(PDE5is).However,reviews evaluating monotherapy noninferiority and patient satisfaction of monotherapy versus combination therapy are lacking.A thorough PubMed search was performed to evaluate combination therapy in ED treatment.Articles published between January 2008 and June 2023 were reviewed,including randomized control trials,retrospective analyses,and cohort studies.Combination therapies included PDE5i plus another PDE5i,testosterone supplementation,α-blockers,vacuum erectile devices,intracavernosal injections,and low-intensity shockwave therapy.Based on this review,PDE5i monotherapy is not inferior to combination therapy and has increased satisfaction,convenience,and ease of use for patients with ED.Limitations of current literature on combination therapy include small sample size,limited data on patient satisfaction,possible biases,and limited follow-up time.Further studies will need larger randomized control trials with follow-up times greater than 1 year.

The use of antimuscarinics,phosphodiesterase type Ⅴ inhibitors and phytotherapy for lower urinary tract symptoms in men

Besides the mainstay of α-blockers and 5α-reductase inhibitors,other forms of medical therapy complete the armamentarium in the treatment of lower urinary tract symptoms(LUTS)in men.These treatments can target specific symptoms as well as associated symptoms that would affect the quality of life of the patients.Many patients are bothered by storage symptoms,more so than the voiding symptoms.Antimuscarinics are efficacious and safe,provided the patients do not have high post void residual urine.Many patients with LUTS also have erectile dysfunction,and phosphodiesterase type Ⅴ inhibitors are effective in relieving both LUTS as well as erectile dysfunction for such patients.Phytotherapy provides a popular and safe treatment for LUTS,however,the efficacy of the treatment has not been proven in well conducted prospective randomized controlled studies.

磷酸二酯酶-5型抑制剂与五羟色胺再摄取抑制剂治疗勃起功能障碍合并早泄疗效及安全性Meta分析

目的评价单独使用磷酸二酯酶-5型(PDE5)抑制剂或联合五羟色胺再摄取抑制剂(SSRIs)对比单独应用SSRIs治疗勃起功能障碍(ED)与早泄(PE)共病的疗效与安全性。方法检索下述网站:知网、PubMed、Web of Science、Embase、万方、维普数据库、中国生物医学文献服务系统、中华医学期刊,自建库起至2022年11月,单独使用PDE5抑制剂或联合SSRIs对比单独应用SSRIs治疗ED与PE共病的随机对照试验,用Revman 5.4.1软件分析阴道内射精潜伏期(IELT)、国际勃起功能指数5项问卷(IIEF-5)评分及不良反应率。结果最终纳入文献9篇,涉及793例患者。Meta分析显示:与单独应用SSRIs治疗ED与PE共病相比,单独使用PDE5抑制剂或联合SSRIs治疗后患者IELT更高[MD=1.99,95%CI(1.51~2.46),P<0.001]、IIEF-5评分更高[MD=4.61,95%CI(3.68~5.55),P<0.001],不良反应无统计学差异[RR=0.99,95%CI(0.74~1.31),P=0.92]。结论治疗ED与PE共病患者时,应优先治疗ED或同时治疗ED和PE,在ED和PE方面都能获得更好的治疗效果,同时不良反应也没有增加。

Effect of phosphodiesterase inhibitors in the bladder

Many aging men will experience lower urinary tract symptoms(LUTS).Phosphodiesterase type 5(PDE5)inhibitors have shown promise in treating LUTS in these patients.PDE5 inhibitors mediate their effects through several pathways including cAMP,NO/cGMP,Kchannel modulated pathways,and the L-cysteine/H2S pathway.PDE5 inhibitors exert their effect in muscle cells,nerve fibers,and interstitial cells(ICs).The use of PDE5 inhibitors led to improvement in LUTS.This included urodynamic parameters.PDE5 inhibitors may play a significant role in LUTS due to their effect on the bladder rather than the prostate.

PDE-5i联合AVSS RigiScan检测对ED患者特征及PCDU综合评估的分析

目的采用阴茎血流彩色多普勒超声(PCDU)对磷酸二酯酶5抑制剂(PDE-5i)联合听视觉性刺激(AVSS)阴茎硬度测量仪(RigiScan)检测异常的阴茎勃起功能障碍(ED)患者特征进行综合评估,探讨PCDU在ED评估中的临床价值。方法选择2014年1月至2021年10月就诊于中国中医科学院西苑医院男科诊断为ED且行PDE-5i联合AVSS的RigiScan检测结果为异常的患者共1477例,平均年龄(36.16±9.39)岁,平均病程(33±9.12)月,所有患者均完成PCDU检查。结果根据PCDU诊断标准将受检者分为四组:非血管性ED组611例(41%)、动脉性ED组266例(18%)、静脉性ED组375例(26%)和动静脉混合性ED组225例(15%),对四组患者一般特征及各项PCDU指标进行多组间比较。其中,除各组间病程无统计学差异外,各组间年龄、右侧阴茎海绵体动脉收缩期峰值流速(PSV)、右侧舒张末期流速(EDV)、右侧阻力指数(RI)、左侧PSV、左侧EDV、左侧RI比较均有统计学差异(P<0.05)。结论药物联合AVSS的RigiScan检测虽具有简便、可重复性等特点,但不能很好地区分非血管性ED和血管性ED,临床上仍需结合PCDU检查对血管性ED进一步诊断。年龄是血管性ED病情趋于加重的独立风险因素。

基于FAERS数据库的4种磷酸二酯酶5抑制剂安全性分析

目的对真实世界不良事件报告数据进行挖掘,分析4种磷酸二酯酶5(PDE5)抑制剂的上市后安全性特征。方法检索美国食品药品监督管理局(FDA)不良事件报告系统(FAERS),分别收集2012年第二季度至2022第三季度以西地那非、他达拉非、伐地那非和阿伐那非为首要怀疑药物的不良事件(ADE)报告数据,并进行系统-器官分类(SOC)和首选术语(PT)标准化映射分析,根据报告比值比(ROR)法和信息成分分析(IC)法筛选出药品不良反应(ADR)的有效不相称测定信号,并对高强度信号进行分析。结果共纳入西地那非ADE报告27695例、他达拉非16683例、伐地那非718例、阿伐那非222例,4种药物ADE报告的SOC主要类型较为类似。在高强度ADR信号方面,整体信号强度(按ROR值)为西地那非>他达拉非>伐地那非,未检测出阿伐那非的有效ADR信号。其中西地那非ADR信号主要集中于生殖系统并出现多个恶性皮肤肿瘤相关ADR信号,他达拉非的恶性皮肤肿瘤相关ADR信号强度明显高于其他药物、且其大部分高强度信号尚未被说明书收载,伐地那非则主要为生殖系统疾病和眼器官疾病。结论4种PDE5抑制剂的ADE整体分布具有一致性,但具体ADR信号特征方面存在一定差异,临床应用时应予以针对性关注,并重点建议对伐地那非和西地那非药品说明书中的ADR信息进行及时补充更新。

新型磷酸二酯酶5抑制剂CPD1对单侧输尿管梗阻引起的肾间质纤维化小鼠治疗作用

目的探讨新型磷酸二酯酶5抑制剂CPD1对单侧输尿管梗阻(unilateral ureteric obstruction,UUO)诱导的肾纤维化小鼠肾脏组织结构损伤及间质纤维化的影响。方法8周龄♂C57BL/6 J小鼠随机分为假手术组、模型组、CPD1治疗组,手术结扎模型组和治疗组小鼠左侧输尿管,假手术组仅分离输尿管而不结扎。造模2 h后,给予CPD1(5 mg·kg^(-1)·d^(-1))灌胃治疗,持续7 d。通过组织病理学染色和Western blot,观察CPD1治疗对UUO小鼠患侧肾脏组织结构病变和纤维化标志蛋白:纤维连接蛋白(fibronectin,FN)、α平滑肌肌动蛋白(α-SMA)、Ⅰ型胶原(collagen-Ⅰ)、肾损伤分子-1(kidney injury molecule 1,Kim-1)表达及分布的影响。结果与假手术组相比,UUO组小鼠患侧肾组织中肾小管扩张,可见明显空泡变性,炎症浸润增加,FN、α-SMA、collagen-I及Kim-1蛋白的表达明显增加(P<0.05);CPD1可明显改善UUO模型小鼠患侧肾脏的结构,降低胶原纤维蛋白的沉积,纤维化标志蛋白FN、α-SMA、collagen-I及Kim-1的表达均得到明显抑制(P<0.05)。结论磷酸二酯酶5抑制剂CPD1通过下调细胞外基质ECM的沉积,减少Kim-1介导的肾损伤,改善输尿管梗阻诱导的肾间质纤维化,其具体的作用机制还有待进一步研究。

新型磷酸二酯酶5抑制剂CPD1对四氯化碳诱导的肝纤维化小鼠治疗作用

目的探讨新型磷酸二酯酶5抑制剂CPD1对四氯化碳(carbon tetrachloride,CCl 4)诱导的肝纤维化小鼠肝组织结构损伤和肝星状细胞(hepatic stellate cells,HSCs)活化的影响。方法SPF级雄性C57BL/6 J小鼠随机分为正常对照组、模型组、CPD1治疗组、他达拉非治疗组,模型组和治疗组小鼠腹腔注射CCl 4(每周2次)。造模4周后治疗组分别给予CPD1(2 mg·kg^(-1)·d^(-1))、他达拉非(10 mg·kg^(-1)·d^(-1))灌胃治疗,持续4周。模型到期后,通过组织病理学染色、免疫荧光技术观察CPD1治疗对肝纤维化小鼠肝形态、组织结构损伤、胶原沉积及HSCs活化标志物α平滑肌肌动蛋白(α-smooth muscle actin,α-SMA)、人肝星状细胞系LX-2细胞中纤维连接蛋白(fibronectin)表达和分布的影响。结果与正常组相比,模型组小鼠肝组织出现肝细胞坏死,炎症细胞浸润增加,肝小叶结构破坏,汇管区出现胶原沉积,α-SMA表达和分布明显增加;CPD1治疗可明显减轻模型小鼠肝组织损伤程度,减少肝细胞坏死和炎症细胞浸润,减轻胶原纤维的沉积,降低α-SMA的表达及分布,且治疗效果优于他达拉非;同时CPD1明显抑制LX-2细胞中转化生长因子-β1(TGF-β1)诱导的fibronectin和PAI-1蛋白的表达。结论磷酸二酯酶5抑制剂CPD1通过抑制HSCs的激活,减少肝组织中胶原纤维蛋白的产生,延缓肝纤维化的进展。