PMID- 11227730 OWN - NLM STAT- MEDLINE DCOM- 20010524 LR - 20181113 IS - 0391-4097 (Print) IS - 0391-4097 (Linking) VI - 24 IP - 1 DP - 2001 Jan TI - Administration of glutathione in patients with type 2 diabetes mellitus increases the platelet constitutive nitric oxide synthase activity and reduces PAI-1. PG - 37-41 AB - Several studies suggest that nitric oxide (NO) production is impaired in diabetes mellitus. Reduced levels of NO could contribute to cardiovascular mortality. Furthermore, NO synthesis is impaired in glutathione (GSH)-depleted human umbilical vein endothelial cells and GSH is reduced in patients with type 2 diabetes mellitus (T2DM). We tested the hypothesis that treatment with GSH may improve platelet constitutive NO sinthase (cNOS) activity in patients with T2DM. Fifteen patients with T2DM underwent a treatment with GSH 600 mg/day i.m. for 10 days. With respect to the basal values on the 10th day of treatment, the red blood cell GSH concentration and platelets cNOS increased (1.4+/-0.1 vs 1.9+/-0.1 micromol/10(10) RBC, p<0.001 and 0.7+/-0.1 vs 2.9+/-0.2 fmol x min(-1) x 10(-9) PLTs, p<0.001, respectively) and the plasma PAI-1 levels diminished (81.4+/-3.7 vs 68.7+/-4.0 ng/ml, p<0.002). A negative correlation between the cNOS and the PAI-1 was found on the basal values. After a wash-out of 30 days the values of red blood cell GSH concentration, platelet cNOS activity and PAI-1 Ag returned to the basal levels. These data suggest that the administration of GSH, in patients with T2DM, is able to improve platelet cNOS activity together with a reduction of PAI-1. FAU - Martina, V AU - Martina V AD - Department of Internal Medicine, University of Torino, Italy. camanni@pianeta.net FAU - Bruno, G A AU - Bruno GA FAU - Zumpano, E AU - Zumpano E FAU - Origlia, C AU - Origlia C FAU - Quaranta, L AU - Quaranta L FAU - Pescarmona, G P AU - Pescarmona GP LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Italy TA - J Endocrinol Invest JT - Journal of endocrinological investigation JID - 7806594 RN - 0 (Plasminogen Activator Inhibitor 1) RN - 31C4KY9ESH (Nitric Oxide) RN - EC 1.14.13.39 (NOS3 protein, human) RN - EC 1.14.13.39 (Nitric Oxide Synthase) RN - EC 1.14.13.39 (Nitric Oxide Synthase Type III) RN - GAN16C9B8O (Glutathione) SB - IM MH - Aged MH - Blood Platelets/*enzymology MH - Diabetes Mellitus, Type 2/blood/*drug therapy MH - Endothelium, Vascular/metabolism MH - Erythrocytes/metabolism MH - Female MH - Glutathione/administration & dosage/blood/*therapeutic use MH - Humans MH - Male MH - Middle Aged MH - Nitric Oxide/biosynthesis MH - Nitric Oxide Synthase/*blood MH - Nitric Oxide Synthase Type III MH - Plasminogen Activator Inhibitor 1/*blood MH - Umbilical Veins EDAT- 2001/03/03 10:00 MHDA- 2001/05/26 10:01 CRDT- 2001/03/03 10:00 PHST- 2001/03/03 10:00 [pubmed] PHST- 2001/05/26 10:01 [medline] PHST- 2001/03/03 10:00 [entrez] AID - 10.1007/BF03343806 [doi] PST - ppublish SO - J Endocrinol Invest. 2001 Jan;24(1):37-41. doi: 10.1007/BF03343806.