title: Effects of Metadoxine on cellular status of glutathione and of enzymatic defence system following acute ethanol intoxication in rats.
abstract: The aim of the study was to determine whether a combination of pyridoxine and pyrrolidone carboxylate (PCA) could influence the antioxidant defence system in hepatic and extrahepatic tissues during acute ethanol administration. The results showed that ethanol treatment led to a significant depletion of reduced glutathione and increase in oxidized glutathione (GSSG) in the different organs, associated with decreased activity of glutathione reductase. Pretreatment of animals with Metadoxine (PCA + pyridoxine) one hour before ethanol administration produced a significant protection against glutathione (GSH) depletion in the different organs examined. This was consistent with an increase in glutathione reductase activity. In view of the fact that free thiol compounds such as glutathione are vital in cellular defence against oxidants and that decreases in reduced glutathione precede lethal cell injury resulting from free radical accumulation, our study supports the effectiveness of Metadoxine as a useful therapeutic agent effective in the management of all those pathological conditions where a severe imbalance of cellular redox state seems to take place as a result of the generation of free radical species.
authors.affiliation: Institute of Biological Chemistry, University of Catania, School of Medicine, Italy.
authors.forename: V
authors.initials: V
authors.lastname: Calabrese
authors.forename: A
authors.initials: A
authors.lastname: Calderone
authors.forename: N
authors.initials: N
authors.lastname: Ragusa
authors.forename: V
authors.initials: V
authors.lastname: Rizza
mesh_terms: D000435:Alcoholic Intoxication / Q000188:drug therapy* / Q000378:metabolism; D000818:Animals; D001921:Brain / Q000187:drug effects / Q000378:metabolism; D004338:Drug Combinations; D005978:Glutathione / Q000378:metabolism*; D005979:Glutathione Peroxidase / Q000378:metabolism; D005980:Glutathione Reductase / Q000378:metabolism; D007668:Kidney / Q000187:drug effects / Q000378:metabolism; D008099:Liver / Q000187:drug effects* / Q000201:enzymology; D008297:Male; D011736:Pyridoxine / Q000494:pharmacology*; D011761:Pyrrolidonecarboxylic Acid / Q000494:pharmacology*; D051381:Rats; D017208:Rats, Wistar
chemical_list: D004338:Drug Combinations; D005979:Glutathione Peroxidase; D005980:Glutathione Reductase; C037845:metadoxine; D005978:Glutathione; D011736:Pyridoxine; D011761:Pyrrolidonecarboxylic Acid