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https://www.readbyqxmd.com/read/28336566/branch-retinal-vein-occlusion-secondary-to-sildenafil
#1
Hussein Almuhtaseb, Osama Kanavati, Andrew Lotery
No abstract text is available yet for this article.
March 23, 2017: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/28335220/pde5-inhibitors-loaded-nanovesicles-physico-chemical-properties-and-in-vitro-antiproliferative-activity
#2
Roberta F De Rose, Maria Chiara Cristiano, Marilena Celano, Valentina Maggisano, Ada Vero, Giovanni Enrico Lombardo, Martina Di Francesco, Donatella Paolino, Diego Russo, Donato Cosco
Novel therapeutic approaches are required for the less differentiated thyroid cancers which are non-responsive to the current treatment. In this study we tested an innovative formulation of nanoliposomes containing sildenafil citrate or tadalafil, phosphodiesterase-5 inhibitors, on two human thyroid cancer cell lines (TPC-1 and BCPAP). Nanoliposomes were prepared by the thin layer evaporation and extrusion methods, solubilizing the hydrophilic compound sildenafil citrate in the aqueous phase during the hydration step and dissolving the lipophilic tadalafil in the organic phase...
May 18, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335023/qbd-driven-development-and-validation-of-liquid-chromatography-tandem-mass-spectrometric-method-for-the-quantitation-of-sildenafil-in-human-plasma
#3
M Saquib Hasnain, Shaukat Ali Ansari, Shireen Rao, Mohammad Tabish, Mukul Singh, Mohammad Syafiq Abdullah, Mohammed Tahir Ansari
The present work was employing the Quality by Design approach for the development and validation of a LC-MS-MS method to support the clinical advancement in determination of sildenafil in human plasma using lorazepam as an internal standard. Sample preparation involved solid phase extraction and calibration range observed between 3 and 1,700 ng/mL. The method was systematically optimized by employing Box-Behnken design and used mobile phase flow rate, pH and composition of mobile phase as the critical factors, and assessing the design for retention time and peak area as the responses...
February 27, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28334528/why-prodrugs-and-propesticides-succeed
#4
John E Casida
What are the advantages of bioactivation in optimizing drugs and pesticides? Why are there so many prodrugs and propesticides? These questions are examined here by considering compounds selected on the basis of economic value or market success. The 100 major drugs and 90 major pesticides are divided into ones acting directly and those definitely or possibly requiring bioactivation. Established or candidate prodrugs accounted for 19% of the total drug sales with corresponding values of 20, 37 and 17% for proinsecticides, proherbicides and profungicides...
March 23, 2017: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/28333666/extended-stability-of-morphine-and-sildenafil-for-oral-use-in-infants-and-young-children
#5
Milap C Nahata
Morphine and sildenafil are commercially available at high concentrations which may lead to errors in measuring small volumes to provide low doses needed in infants. The purpose of this study was to assess the stability of morphine sulfate and sildenafil citrate in extemporaneously prepared suspensions for oral use. Morphine (0.2 mg/mL) was prepared from dilution of morphine elixir (2 mg/mL) with distilled water and stored in amber, plastic syringes at 25°C for 60 days. The mean concentration of morphine exceeded 95% of the initial concentration for the entire 60-day study period...
May 2016: International Journal of Pharmaceutical Compounding
https://www.readbyqxmd.com/read/28326740/successful-pregnancy-after-intralipid-addition-to-sildenafil-and-enoxaparin-in-woman-with-history-of-recurrent-pregnancy-loss-rpl
#6
(no author information available yet)
OBJECTIVES: Does addition of Intralipid to sildenafil and enoxaparin immunotherapy improve pregnancy outcome? MATERIALS AND METHOD: Report of a striking case of a patient with history of 4 recurrent pregnancy losses (RPL) and IVF failures. RESULTS: Adding of Intralipid resulted in giving birth to a healthy male baby in the 3th IVF cycle. CONCLUSION: Combination therapy that includes Intralipid may generate successful IVF outcome, although this problem merits further study, especially regarding safety issues...
December 22, 2016: Neuro Endocrinology Letters
https://www.readbyqxmd.com/read/28320395/vasoproliferative-process-resembling-pulmonary-capillary-hemangiomatosis-in-a-cat
#7
J A Jaffey, K J Williams, I Masseau, M Krueger, C Reinero
BACKGROUND: Pulmonary capillary hemangiomatosis is a rare, vascular obstructive disorder that uniformly causes pulmonary arterial hypertension. Clinically, pulmonary capillary hemangiomatosis is indistinguishable from primary pulmonary arterial hypertension and histology is required for definitive diagnosis. The distinctive histologic feature of pulmonary capillary hemangiomatosis is non-malignant extensive proliferation of capillaries in the alveolar septae. Vasodilator treatment of humans with primary arterial hypertension due to pulmonary capillary hemangiomatosis can result in fatal acute pulmonary edema...
March 20, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28317302/retinopathy-of-prematurity-after-sildenafil-treatment
#8
Kazumasa Fuwa, Shigeharu Hosono, Nobuhiko Nagano, Shori Takahashi, Motohiro Nakashima
No abstract text is available yet for this article.
March 2017: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/28316997/sildenafil-can-affect-innate-and-adaptive-immune-system-in-both-experimental-animals-and-patients
#9
REVIEW
Monika Kniotek, Agnieszka Boguska
Sildenafil, a type 5 phosphodiesterase inhibitor (PDE5-I), is primarily used for treating erectile dysfunction. Sildenafil inhibits the degradation of cyclic guanosine monophosphate (cGMP) by competing with cGMP for binding site of PDE5. cGMP is a secondary messenger activating protein kinases and a common regulator of ion channel conductance, glycogenolysis, and cellular apoptosis. PDE5 inhibitors (PDE-Is) found application in cardiology, nephrology, urology, dermatology, oncology, and gynecology. Positive result of sildenafil treatment is closely connected with its immunomodulatory effects...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28315678/protective-effect-of-co-administration-of-curcumin-and-sildenafil-in-alcohol-induced-neuropathy-in-rats
#10
Maninder Kaur, Amarjeet Singh, Bimlesh Kumar, Sachin Kumar Singh, Amit Bhatia, Monica Gulati, T Prakash, Palak Bawa, Adil Hussain Malik
Neuropathic pain associated with chronic alcohol consumption is a medico-socioeconomical problem that affects both central and peripheral nervous system and has no satisfactory treatment till date. The present study was designed to investigate the protective effect of co-administration of curcumin and sildenafil on alcohol induced neuropathic pain in rats. In order to carry out this, ethanol (35% v/v, 10g/kg, p.o.) was administered for 10 weeks to induce neuropathic pain. Curcumin (30 and 60mg/kg, i.p.) and sildenafil (5 and 10mg/kg, i...
March 16, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28303689/non-healing-ischaemic-digital-ulcer-in-a-systemic-sclerosis-patient-a-challenging-clinical-case
#11
Sophie Blaise, Matthieu Roustit, Alexandra Forli, Bernard Imbert, Jean-Luc Cracowski
Ischaemic digital ulcers (DUs) are an indicator of the severity of the microangiopathy in patients with systemic sclerosis (SSc). DUs are a frequent complication, affecting about 50% of patients with SSc, and are often recurrent. In cross-sectional studies involving patients with SSc, the frequency of ischaemic DUs was 12-16% with a major impact on hand function and quality of life. Effective therapy for DUs remains elusive. Intravenous iloprost has been demonstrated to have a positive effect on healing of active DUs...
March 16, 2017: International Wound Journal
https://www.readbyqxmd.com/read/28302926/long-term-effect-of-sildenafil-on-echocardiographic-parameters-in-dogs-with-asymptomatic-myxomatous-mitral-valve-degeneration
#12
Anusak Kijtawornrat, Siripen Komolvanich, Nakkawee Saengklub, Prapawadee Pirintr, Pakit Boonpala, Chollada Buranakarl
Sildenafil is a selective phosphodiesterase-5 inhibitor that has been demonstrated to delay ventricular remodeling in humans and experimental animals. The aim of this prospective study was to assess the chronic effects of sildenafil administration on echocardiographic indices and N-terminal pro-B-type natriuretic peptide (NT-proBNP) in dogs with naturally occurring, asymptomatic myxomatous mitral valve degeneration. Thirty client-owned dogs with ACVIM class B1 or B2 were enrolled. Dogs were randomly assigned to treatment (sildenafil 1-3 mg/kg, PO, BID for 180 days) or control groups...
March 11, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28296282/sildenafil-reduces-neuroinflammation-in-cerebellum-restores-gabaergic-tone-and-improves-motor-in-coordination-in-rats-with-hepatic-encephalopathy
#13
Ana Agusti, Vicente Hernández-Rabaza, Tiziano Balzano, Lucas Taoro-Gonzalez, Andrea Ibañez-Grau, Andrea Cabrera-Pastor, Santos Fustero, Marta Llansola, Carmina Montoliu, Vicente Felipo
AIMS: Patients with liver disease may develop hepatic encephalopathy (HE), with cognitive impairment and motor in-coordination. Rats with HE due to portacaval shunts (PCS) show motor in-coordination. We hypothesized that in PCS rats: (i) Motor in-coordination would be due to enhanced GABAergic tone in cerebellum; (ii) increased GABAergic tone would be due to neuroinflammation; (iii) increasing cGMP would reduce neuroinflammation and GABAergic tone and restore motor coordination. To assess these hypotheses, we assessed if (i) treatment with sildenafil reduces neuroinflammation; (ii) reduced neuroinflammation is associated with reduced GABAergic tone and restored motor coordination...
March 11, 2017: CNS Neuroscience & Therapeutics
https://www.readbyqxmd.com/read/28296277/effect-of-icariin-in-combination-with-daily-sildenafil-on-penile-atrophy-and-erectile-dysfunction-in-a-rat-model-of-bilateral-cavernous-nerves-injury
#14
Y Xu, H Xin, Y Wu, R Guan, H Lei, X Fu, Z Xin, Y Yang
The commonly utilized phosphodiesterase type 5 inhibitors do not lead to satisfactory penile erection after radical prostatectomy mainly because of insufficient nitric oxide drive from the damaged cavernous nerves. The aim of this study was to assess the efficacy and mechanisms of icariin in combination with daily sildenafil on neurogenic erectile dysfunction and penile atrophy in a rat model of bilateral cavernous nerves injury. Sixty male Sprague-Dawley rats injected with 5-ethynyl-2-deoxyuridine (50 mg/kg) at postnatal day 1 for the purpose of tracking endogenous stem cells in penis...
March 10, 2017: Andrology
https://www.readbyqxmd.com/read/28295458/improvement-in-erectile-function-in-a-rat-model-of-high-cholesterol-diet-induced-atherosclerosis-by-atorvastatin-in-a-manner-that-is-independent-of-its-lipid-lowering-property
#15
Z Zhang, L Tang, W Yu, Y Chen, Y-T Dai
The purpose of the present study is to explore the effects of a lipid-lowering drug atorvastatin, a three-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase inhibitor, in the treatment of erectile dysfunction (ED) in a rat model of atherosclerosis (AS) and the possible mechanisms underneath. A high-cholesterol diet was administrated to Sprague-Dawley rats in an attempt to induce an ASED model, which was later confirmed by abdominal aorta histopathology and erectile function evaluation. ASED rats were further assigned to non-treatment group, atorvastatin low-dose treatment group (5 mg kg(-1)  day(-1) ), high-dose group (10 mg kg(-1)  day(-1) ) and sildenafil (1...
March 10, 2017: Andrologia
https://www.readbyqxmd.com/read/28289495/treatment-of-chronic-thromboembolic-pulmonary-hypertension-the-role-of-medical-therapy-and-balloon-pulmonary-angioplasty
#16
Timothy M Fernandes, David S Poch, William R Auger
Chronic thromboembolic pulmonary hypertension (CTEPH) is a potentially curable disease when treated with pulmonary thromboendarterectomy (PTE). However, even at experienced surgical centers, nearly one-third of patients with CTEPH will be deemed inoperable for reasons including distal disease, comorbidities, or out-of-proportion pulmonary hypertension. It is in these patients with inoperable CTEPH that pulmonary hypertension (PH)-targeted medical therapy and balloon pulmonary angioplasty have potential therapeutic value...
October 2016: Methodist DeBakey Cardiovascular Journal
https://www.readbyqxmd.com/read/28281457/evaluation-of-the-effect-of-sildenafil-on-the-microvascular-blood-flow-in-patients-with-systemic-sclerosis-a-randomised-double-blind-placebo-controlled-study
#17
Fernando V Andrigueti, Pâmela C C Ebbing, Maria I Arismendi, Cristiane Kayser
OBJECTIVES: To evaluate the effect of sildenafil as add-on therapy on the microvascular blood flow in patients with Raynaud's phenomenon (RP) secondary to systemic sclerosis (SSc). METHODS: In this double-blind, placebo-controlled study, 41 patients with RP secondary to SSc were randomly assigned to receive oral sildenafil 100 mg/day (21 patients, mean age 47.2 years) or placebo (20 patients, mean age 41.6 years) for 8 weeks. Patients were evaluated at baseline, 8 weeks after treatment, and 2 weeks after the end of the treatment...
March 9, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28277352/sildenafil-citrate-therapy-for-oligohydramnios-a-randomized-controlled-trial
#18
Mohammad Ahmed Maher, Tarek Mohammad Sayyed, Nabih Elkhouly
OBJECTIVE: To compare sildenafil plus hydration with hydration alone in improving the amniotic fluid index and neonatal outcomes in pregnancies complicated by idiopathic oligohydramnios ( amniotic fluid index less than 5 cm without underlying maternal or fetal causes and with normal fetal growth). METHODS: This was an open-label randomized trial for women carrying singleton pregnancies at 30 weeks of gestation or more with idiopathic oligohydramnios detected during routine ultrasonogram...
April 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28275519/sildenafil-citrate-in-combination-with-tamsulosin-versus-tamsulosin-monotherapy-for-management-of-male-lower-urinary-tract-symptoms-due-to-benign-prostatic-hyperplasia-a-randomised-double-blind-placebo-controlled-trial
#19
Amr Fawzi, Mostafa Kamel, Emad Salem, Esam Desoky, Mohamed Omran, Hazem Elgalaly, Ahmed Sakr, Aref Maarouf, Salem Khalil
OBJECTIVE: To assess the additive effect of sildenafil citrate to tamsulosin in the treatment of lower urinary tract symptoms due to benign prostatic hyperplasia (LUTS/BPH) in men with or without erectile dysfunction (ED). PATIENTS AND METHODS: In all, 150 men with untreated LUTS/BPH with or without ED were randomised to receive sildenafil 25 mg once daily (OD) or placebo OD (night time) combined with tamsulosin 0.4 mg OD (day time) for 6 months. Changes from pre-treatment scores in International Prostate Symptom Score (IPSS), IPSS-quality of life (QoL) score, maximum urinary flow rate (Qmax), and the five-item version of the International Index of Erectile Function questionnaire (IIEF-5) were assessed at 3 and 6 months...
March 2017: Arab Journal of Urology
https://www.readbyqxmd.com/read/28268155/functional-variations-in-the-nos3-gene-are-associated-with-erectile-dysfunction-susceptibility-age-of-onset-and-severity-in-a-han-chinese-population
#20
Bo Yang, Liangren Liu, Zhufeng Peng, Dongliang Lu, Zhengju Ren, Shengzuo Liu, Xiling Yang, Jian Liao, Qiang Dong
BACKGROUND: Impaired function of endothelial nitric oxide synthase (eNOS) is involved in the pathologic processes of erectile dysfunction (ED), and three functional polymorphisms (G894T, T-786C, and a tandem repeat of 27 bp in intron 4) in the NOS3 gene, which encodes eNOS, are associated with the clinical characteristics of ED in several populations. AIM: To investigate the effect of these variations of NOS3 on ED phenotypes and the response to sildenafil in a Han Chinese population...
March 4, 2017: Journal of Sexual Medicine
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