[Survey the addition of sildenafil to alpha- blockers in the management of acute urinary retention related to benign prostatic hyperplasia]

Introduction: acute Urinary Retention [AUR] related to benign prostatic hyperplasia [BPH] is an increasingly prevalent condition in men, and the presenting feature in about 25% of men undergoing prostatectomy

Objective: evaluate the efficacy of sildenafil for treating patients with AUR due lo BPH

Materials and Methods: this is a clinical trial, randomized, double blind study. Eighty patients with AUR related lo BPH randomly assigned to receive either 0.4mg tamsulosine hydrochloride and 25mg sildenafil citrate or 0.4mg tamsulosine hydrochloride and placebo. After 48hours, the catheter was removed and ability to void in each group was assessed. Data were analyzed by SPSS 10 and K 2, T test, P<0.05 was considered significant

Results: differences in age, prostate size and residue was not significant between two groups [p=0.791, p=0.587, p=0.364 respectively]. After catheter removal 22 patients [55%] in placebo group and 32 patients [80%] in sildenafil group voided successfully [p=0.017]. After week 19 men [47.5% ] taking placebo and 28men [70%] taking sildenafil could void yet [p=0.041].The difference 1 between two groups was statically significant [p=0.041]

Conclusion: addition of sildenafil citrate to alpha-blockers is effective in successful voiding after catheter removal for AUR related to BPH. Sildenafil may be recommended for reducing the re-catheterization rate

study on the hemopoietic activity of human placenta in vitro, in the presence and absence of stimulators and inhibitors of transcription and translation

The hemopoietic activity of the human placenta was studied in vitro under various conditions in order to assess the optimae conditions of protein synthesis and colony stimulating factor [CSF] production by this tissue. The hemopoietic activity of placental tissue was assayed by the semi-solid agar medium technique. In order to obtain maximum hemopoietic activity, various stimulators were examined and it was determined that lipopolysaccharide was the most potent stimulator. Inhibitors of transcription and translation were also examined alone and in the presence of stimulators. They potently suppressed hemopoietic activity. Pulse-chase studies with the use of 3H-leucine were used to determine the kinetics of protein synthesis of placental tissue in vitro