OBJECTIVETo study the chemical constituents of Psammosilene tunicoides.

METHODThe two chemical constituents were separated by various chromatographic methods, and their structures were identified on the basis of spectroscopic analysis.

RESULTTwo beta-carboline alkaloids were separated from normal butanol fraction of P. tunicoides, and identified as 1-acetyl-3-methoxycarbonyl-beta-carboline (1) and 1-acetyl-3-methoxycarbonyl-4-hydroxyl-beta-carboline (2).

CONCLUSIONCompound 1 is separated from this plant as natural products for the first time, and compound 2 was a new compound.

Tadalafil is an effective drug in treating erectile dysfunction (ED), and its clinical efficacy has been confirmed by a great many researches. Tadalafil is distinguished from sildenafil and vardenafil by its prolonged action lasting 36 hours for a sigle dose, compared with about 4 hours for sildenafil. Furthermore, this drug is effective in improving the erectile function of ED patients including those with various comorbid conditions. Tadalafil can help ED patients to regain morning erection and recover the confidence as a man. More and more ED patients choose tadalafil as the first line therapy because of its long efficacy and its conformability to the therapeutic requirement by restoring ED patients to normal, natural and pleasurable sexual life.
Carbolines ; therapeutic use ; Erectile Dysfunction ; drug therapy ; Humans ; Male ; Tadalafil

Crassostrea sikamea (C.sikamea) is an important edible and medicinal seafood in China. In the present study, a compound named flazin was separated and identified from the ethyl acetate extract of C.sikamea (EAECs) for the first time. In addition, the 3-(4, 5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetra zolium (MTS) assay revealed that EAECs and flazin inhibited the transformation of splenic lymphocytes in vitro. Moreover, flazin (20 μg·mL
Animals ; Carbolines ; Crassostrea ; Furans ; Lymphocytes ; Rats ; Rats, Sprague-Dawley ; Spleen

We report here on a case of priapism that was associated with the use of tadalafil. A 41 year-old-man visited our urology outpatient department with a relapsed erection he'd experienced for 3 days. He had no contributing factors for the priapism. He had taken tadalafil, which was prescribed at a local medical center 3 days previously. After the development of priapism, he first visited the emergency department of other hospital. Aspiration was done and then the priapism was resolved. Yet the priapism recurred 2 days later, andaspiration and other bedside management failed to resolve it. After his arrival to our department, weimmediately performed a caverno-glandular shunt with 18-gauge needle and we observed bright reddish- color blood. An intracorporal ephedrine injection and saline irrigation were then done. After that, the patient gradually experienced detumescence. The priapism did not recur during the 2 days of the hospitalization period. At the outpatient follow-up of 3 months later, patient almost recovered to his full erectile function and he had normal sexual activity.
Carbolines ; Emergencies ; Ephedrine ; Follow-Up Studies ; Hospitalization ; Humans ; Needles ; Outpatients ; Priapism ; Sexual Behavior ; Urology ; Tadalafil

Priapism is an abnormal persistent penile erection that continues for more than 4 hours, without sexual stimulation according to the definition of the AUA (American Urological Association) guideline on the management of priapism. It was relatively rare in the past but has been increasing in the incidence since the advent of pharmacological agents. Stuttering priapism is a recurrent form of ischemic priapism and its treatment goal is to prevent the recurrences of priapism and resultant erectile dysfunction. We present the case of a patient who took tadalafil and thereafter had idiopathic recurrent episodes of ischemic priapism during the sleep and we show several treatment options of stuttering priapism with review of recent related articles.
Carbolines ; Erectile Dysfunction ; Humans ; Incidence ; Male ; Penile Erection ; Priapism ; Recurrence ; Stuttering ; Tadalafil

Oral phosphodiesterase type 5 (PDE5) inhibitors have provided non-invasive, effective, and well-tolerated treatments for patients with erectile dysfunction (ED). However, many patients with ED are unresponsive to 'on-demand' PDE5 inhibitors. In addition, the lack of spontaneity and naturalness of the on-demand regimen could be a reason for decreased compliance with PDE5 inhibitors. Recently, tadalafil and udenafil were approved for low-dose daily administration for the treatment of ED. Since the introduction of the concept of daily administration of PDE5 inhibitors, several reports have supported the potential benefits of this therapy for disease modification, improvement of the treatment response in difficult-to-treat populations, spontaneity, and safety, although further research is needed to better address these hypotheses. In this article, we reviewed the daily administration of PDE5 inhibitors in terms of pharmacokinetics, safety, efficacy, and distinct features.
Carbolines ; Compliance ; Erectile Dysfunction ; Humans ; Male ; Phosphodiesterase 5 Inhibitors ; Pyrimidines ; Sulfonamides ; Tadalafil

PURPOSE: We studied the relative importance of high-sensitivity C-reactive protein (hs-CRP) concentrations in patients with erectile dysfunction (ED) and diabetes and determined whether the hs-CRP level predicts the response to treatment with 5 mg tadalafil once daily. MATERIALS AND METHODS: We enrolled 102 men (aged 40-60 years) with diabetes and ED. All patients completed the International Index of Erectile Function (IIEF) questionnaire and were given 5 mg tadalafil daily. The IIEF and serum hs-CRP levels in patients and healthy controls and in patient responders and nonresponders to 5 mg tadalafil once daily were compared. RESULTS: Median age was 53.2 years (range, 45 to 62 years) in patients and 55.6 years (range, 47 to 64 years) in healthy controls (p=0.158). The median duration of diabetes was 54.3 months (range, 34 to 70 months). The median IIEF and hs-CRP level were 12.1 (range, 5 to 20) and 0.21 mg/dL (range, 0.05 to 0.6 mg/dL) in patients and 28.2 (range, 13 to 31) and 0.09 mg/dL (range, 0.04 to 0.2 mg/dL) in the controls, respectively (pIIEF=0.000, pCRP=0.031). After tadalafil treatment, 71 patients (69.6%) achieved an erection sufficient for sexual intercourse, whereas 31 (30.4%) did not. The median age of the tadalafil nonresponders was 56.2 years (range, 45 to 64 years) and that of the responders was 51.3 years (range, 42 to 62 years; p=0.065). Median hs-CRP levels were 0.31 mg/dL (range, 0.18 to 0.62 mg/dL) in nonresponders and 0.14 mg/dL (range, 0.09 to 0.4 mg/dL) in responders, respectively (p=0.028). CONCLUSIONS: Serum hs-CRP was significantly higher in patients with ED and diabetes mellitus than in patients without ED. A significant correlation was observed between serum hs-CRP levels, the degree of ED, and responsiveness to tadalafil.
C-Reactive Protein* ; Carbolines ; Coitus ; Diabetes Mellitus ; Erectile Dysfunction* ; Humans ; Male ; Tadalafil ; Phosphodiesterase 5 Inhibitors

Erectile dysfunction(ED) is a common ailment in middle-aged and old men. Since tadalafil was introduced into the treatment of ED in October, 2002, more and more ED patients have chosen tadalafil due to its efficacy and safety. The action mechanism, pharmacokinetics, efficacy and safety of tadalafil have been reported in many basic and clinical research documents. This review is to address the safety of tadalafil in treating ED, and provide further guidance for clinicians' choice and safer use of the drug.
Carbolines ; adverse effects ; therapeutic use ; Erectile Dysfunction ; drug therapy ; Humans ; Male ; Tadalafil

Five purine and carboline alkaloids were isolated from the methanol extract of the ascidian Symplegma oceania. Classic chromatographies including preparative HPLC were used for isolation and purification of the compounds. The structures were established as 6-methoxy-7-methyl-8-oxoguanine (1), 2-methylimino-3-methyl-6-methylamino- 9H-purine (2), 1,2,3,4-tetrahydro-betacarboline (3), 1,2,3,4-tetrahydro-1-methyl-beta-carboline (4) and 1,2,3,4-tetrahydro-beta-carboline-3-carboxylic acid (5) by comparison the spectroscopic data (MS, 1H, 13C-NMR) with those reported in the literatures. Compounds 2-5 were reported from the the genus Symplegma for the first time. The purine and carboline were the major alkaloid types of S. oceania.
Alkaloids ; chemistry ; Animals ; Carbolines ; chemistry ; Magnetic Resonance Spectroscopy ; Molecular Structure ; Purines ; chemistry ; Urochordata ; chemistry

A new type of phosphodiesterase 5 inhibitor, Tadalafil, has been used clinically to treat erectile dysfunction (ED). In this review, we analyzed the recent findings from the clinical trials on tadalafil in ED treatment. All data showed that oral tadalafil was an effective and well-tolerated therapeutic for ED, with many potential pharmacological actions. All this may help to give full play to the clinical value of tadalafil.
Carbolines ; therapeutic use ; Erectile Dysfunction ; drug therapy ; Humans ; Male ; Phosphodiesterase Inhibitors ; therapeutic use ; Tadalafil