cyclic-gmp has been researched along with Ureteral-Calculi* in 2 studies
2 other study(ies) available for cyclic-gmp and Ureteral-Calculi
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[PDE5 inhibitors. A new option in the treatment of ureteral colic?].
PDE5 inhibitors represent the gold standard in the medical therapy of erectile dysfunction (ED). Promising results have been published regarding further urological indications such as treatment of ureteral colic. The aim of the present study was to evaluate the functional effects of the PDE5 inhibitors sildenafil (SIL), vardenafil (VAR), and tadalafil (TAD) on tissue tension and cyclic nucleotide levels of human ureteral smooth muscle segments in vitro.. Relaxant responses of human ureteral smooth muscle were investigated in vitro using the organ bath technique. Cyclic nucleotides cAMP and cGMP were determined by specific radioimmunoassays.. Relaxing effects of ureteral muscle tension were observed in the rank order VAR>SIL>TAD. While only VAR significantly elevated cGMP levels 3.3-fold over control, no increase for cAMP levels was observed.. Our data provide evidence that cGMP is involved in the control of the normal function of the smooth musculature of the human ureter. Our findings suggest the potential of using selective inhibitors of PDE isoenzymes in the treatment of ureteral colic. Topics: Aged; Carbolines; Colic; Cyclic AMP; Cyclic GMP; Dose-Response Relationship, Drug; Female; Humans; Imidazoles; Isometric Contraction; Male; Middle Aged; Muscle, Smooth; Organ Culture Techniques; Phosphodiesterase 5 Inhibitors; Phosphodiesterase Inhibitors; Piperazines; Purines; Radioimmunoassay; Sildenafil Citrate; Sulfones; Tadalafil; Triazines; Ureter; Ureteral Calculi; Ureteral Diseases; Vardenafil Dihydrochloride | 2007 |
Effects of extracorporeal shock wave lithotripsy on plasma levels of nitric oxide and cyclic nucleotides in human subjects.
The role of extracorporeal shock wave lithotripsy (ESWL, Dornier Medizintechnik GmbH, Wessling Munchen, Germany) on plasma nitric oxide (NO) and cyclic nucleotides was investigated. It is known that ESWL increased plasma levels of vasoactive substances.. A total of 28 patients undergoing ESWL for renal (14) and lower ureteral (14) stones participated in a prospective study. Peripheral blood samples were analyzed for plasma nitrite, NO metabolite, cyclic 3', 5'-guanosine monophosphate (cGMP), cyclic 3',5'-adenosine monophosphate and plasma renin activity before, immediately after, 30 and 60 minutes after ESWL. Urine samples were also analyzed for nitrite before, immediately after, 30 and 60 minutes after ESWL. Blood pressure and pulse rate were measured before and after ESWL.. ESWL increased mean plasma nitrite levels. Before, immediately after, 30 and 60 minutes after ESWL mean plasma nitrate plus or minus standard error in patients with renal versus lower ureteral stones was 43.6 +/- 8.5, 52.8 +/- 7.4, 54.0 +/- 8.0 and 52.2 +/- 9.1 versus 27 +/- 5.8, 24.6 +/- 4.7, 23.6 +/- 4.8 and 28.0 +/- 7.1 nM., respectively. Before, immediately after, 30 and 60 minutes after ESWL mean plasma cGMP in patients with renal versus lower ureteral stones was 1.21 +/- 0.1, 1.64 +/- 0.16, 1.52 +/- 0.12 and 1.58 +/- 0.14 versus 1.45 +/- 0.18, 1.52 +/- 0.13, 1.52 +/- 0.15 and 1.51 +/- 0.11 fmol., respectively. Cyclic 3',5'-adenosine monophosphate was not increased by ESWL in patients with renal stones. Urine nitrite increased slightly but not significantly after ESWL. Plasma cyclic nucleotides and nitrite, and urine nitrite were not changed by ESWL in patients with lower ureteral stones. Plasma renin activity decreased significantly in patients with renal stones 60 minutes after ESWL. Blood pressure and pulse rates increased mildly without statistical significance after ESWL for renal stones.. ESWL increases plasma nitrite and cGMP in patients with renal stones, suggesting that shock waves stimulate the NO-cGMP signaling pathway. Topics: Blood Pressure; Cyclic AMP; Cyclic GMP; Heart Rate; Humans; Kidney Calculi; Lithotripsy; Nitric Oxide; Nitrites; Signal Transduction; Ureteral Calculi | 2002 |