PMID- 8556832 OWN - NLM STAT- MEDLINE DCOM- 19960228 LR - 20161123 IS - 0301-0430 (Print) IS - 0301-0430 (Linking) VI - 44 IP - 3 DP - 1995 Sep TI - Isosorbide 5 mononitrate administration increases nitric oxide blood levels and reduces proteinuria in IgA glomerulonephritis patients with abnormal urinary endothelin/cyclic GMP ratio. PG - 163-9 AB - An endothelin urinary hyperexcretion, which is not counterbalanced by an adequate increase in cGMP biosynthesis, was previously detected in some patients with IgA Nephropathy (IgAN). Since this imbalance might potentiate local ET1-mediated hemodynamics effects, 9 IgAN patients with an increased (> or = 0.1) urinary ET1/cGMP ratio (group 1) and 5 IgAN patients with comparable renal function and reduced ET1/cGMP ratio (group 2) were given standard doses of isosorbide 5 mononitrate (as a nitric oxide source). Blood nitric oxide (NO) levels, as detected by electron paramagnetic resonance, significantly increased after isosorbide administration (p < 0.01) and decreased after drug discontinuation in both groups. Nitric oxide levels were significantly related with those of the effective renal plasma flow (p < 0.02), but not with the glomerular filtration rate. Proteinuria levels significantly decreased after drug administration (p < 0.009) in group 1 and returned to baseline levels thereafter, except two cases showing persisting low levels. Values of filtration fraction in the same group decreased after iso5M administration (p < 0.02 compared to basal levels). These results may possibly be related to the counterbalancing effects of nitric oxide on endothelin-mediated mesangial contraction. FAU - Roccatello, D AU - Roccatello D AD - Istituto di Nefrourologia, Universita di Torino, Italy. FAU - Mengozzi, G AU - Mengozzi G FAU - Ferro, M AU - Ferro M FAU - Cesano, G AU - Cesano G FAU - Polloni, R AU - Polloni R FAU - Mosso, R AU - Mosso R FAU - Bonetti, G AU - Bonetti G FAU - Inconis, T AU - Inconis T FAU - Paradisi, L AU - Paradisi L FAU - Sena, L M AU - Sena LM AU - et al. LA - eng PT - Journal Article PL - Germany TA - Clin Nephrol JT - Clinical nephrology JID - 0364441 RN - 0 (Endothelins) RN - 0 (Vasodilator Agents) RN - 31C4KY9ESH (Nitric Oxide) RN - H2D2X058MU (Cyclic GMP) RN - IA7306519N (Isosorbide Dinitrate) RN - LX1OH63030 (isosorbide-5-mononitrate) SB - IM MH - Adult MH - Blood Pressure/drug effects MH - Cyclic GMP/*urine MH - Electron Spin Resonance Spectroscopy MH - Endothelins/*urine MH - Female MH - Glomerulonephritis, IGA/complications/*drug therapy/metabolism MH - Humans MH - Isosorbide Dinitrate/*analogs & derivatives/therapeutic use MH - Male MH - Middle Aged MH - Nitric Oxide/*blood MH - Proteinuria/*drug therapy/etiology/metabolism MH - Vasodilator Agents/*therapeutic use EDAT- 1995/09/01 00:00 MHDA- 1995/09/01 00:01 CRDT- 1995/09/01 00:00 PHST- 1995/09/01 00:00 [pubmed] PHST- 1995/09/01 00:01 [medline] PHST- 1995/09/01 00:00 [entrez] PST - ppublish SO - Clin Nephrol. 1995 Sep;44(3):163-9.