title: Changes of rat plasma total low molecular weight antioxidant level after tabun exposure and consequent treatment by acetylcholinesterase reactivators.
abstract: These experiments were performed on a rat model. The rats were divided into eight groups and consequently exposed to either a saline solution (control), atropine or a combination of atropine and tabun. The reactivation efficacy of the oximes was estimated on the rats exposed to tabun, atropine and a reactivator of AChE. The oximes HI-6, obidoxime, trimedoxime, K203 and KR-22836 were used as representative compounds of commonly available and new AChE reactivators. Besides the positive effect of the administered reactivators on blood AChE activity, the sizable modulation of low molecular weight antioxidant (LMWA) levels was also determined. The LMWA levels in the the animals treated with the oxime reactivators were decreased in comparison with the animals treated by atropine alone. It was found that the levels of LMWA returned to the level found in the control animals when either trimedoxime, K203 or KR-22836 were administered. The principle of oxime reactivator function and a novel insight into AChE activity regulation and oxidative stress is discussed.
authors.affiliation: Centre of Advanced Studies, Faculty of Military Health Sciences, University of Defence, Hradec Kralove, Czech Republic. rau@atlas.cz
authors.forename: Miroslav
authors.initials: M
authors.lastname: Pohanka
authors.forename: Jana Zdarova
authors.initials: JZ
authors.lastname: Karasova
authors.forename: Kamil
authors.initials: K
authors.lastname: Musilek
authors.forename: Kamil
authors.initials: K
authors.lastname: Kuca
authors.forename: Young-Sik
authors.initials: YS
authors.lastname: Jung
authors.forename: Jiri
authors.initials: J
authors.lastname: Kassa
mesh_terms: D000110:Acetylcholinesterase / Q000097:blood; D000818:Animals; D000931:Antidotes / Q000138:chemical synthesis / Q000494:pharmacology*; D000975:Antioxidants / Q000032:analysis; D001285:Atropine / Q000494:pharmacology; D002800:Cholinesterase Inhibitors / Q000633:toxicity*; D002801:Cholinesterase Reactivators / Q000138:chemical synthesis / Q000494:pharmacology*; D008297:Male; D008970:Molecular Weight; D010755:Organophosphates / Q000633:toxicity*; D018384:Oxidative Stress / Q000187:drug effects*; D010091:Oximes / Q000138:chemical synthesis / Q000494:pharmacology*; D051381:Rats; D017208:Rats, Wistar
chemical_list: D000931:Antidotes; D000975:Antioxidants; D002800:Cholinesterase Inhibitors; D002801:Cholinesterase Reactivators; D010755:Organophosphates; D010091:Oximes; D001285:Atropine; D000110:Acetylcholinesterase; C009374:tabun