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In vitro potency of H oximes (HI-6, HLö-7), the oxime BI-6, and currently used oximes (pralidoxime, obidoxime, trimedoxime) to reactivate nerve agent-inhibited rat brain acetylcholinesterase. 2006

Kamil Kuca, and Jiri Cabal, and Jiri Kassa, and Daniel Jun, and Martina Hrabinova
Department of Toxicology, Faculty of Military Health Sciences, Hradec Králové, Czech Republic.

The efficacy of H oximes (HI-6, HLö-7), the oxime BI-6, and currently used oximes (pralidoxime, obidoxime, trimedoxime) to reactivate acetylcholinesterase inhibited by two nerve agents (tabun, VX agent) was tested in vitro. Both H oximes (HI-6, HLö-7) and the oxime BI-6 were found to be more efficacious reactivators of VX-inhibited acetylcholinesterase than pralidoxime and obidoxime. On the other hand, their potency to reactivate tabun-inhibited acetylcholinesterase was low and did not reach the reactivating efficacy of trimedoxime and obidoxime. Thus, none of these compounds can be considered to be a broad-spectrum reactivator of nerve agent-inhibited acetylcholinesterase in spite of high potency to reactivate acetylcholinesterase inhibited by some nerve agents. More than one oxime may be necessary for the antidotal treatment of nerve agent-exposed individuals.

UI MeSH Term Description Entries
D008297 Male Males
D009768 Obidoxime Chloride Cholinesterase reactivator occurring in two interchangeable isomeric forms, syn and anti. Obidoxim,Obidoxime,Toxogonin,Chloride, Obidoxime
D009946 Organothiophosphorus Compounds Compounds containing carbon-phosphorus bonds in which the phosphorus component is also bonded to one or more sulfur atoms. Many of these compounds function as CHOLINERGIC AGENTS and as INSECTICIDES. Compounds, Organothiophosphorus
D010091 Oximes Compounds that contain the radical R2C Aldoximes,Hydroxyimino Compounds,Ketoxime,Ketoximes,Oxime,Compounds, Hydroxyimino
D010755 Organophosphates Carbon-containing phosphoric acid derivatives. Included under this heading are compounds that have CARBON atoms bound to one or more OXYGEN atoms of the P( Organophosphate,Phosphates, Organic,Phosphoric Acid Esters,Organopyrophosphates,Acid Esters, Phosphoric,Esters, Phosphoric Acid,Organic Phosphates
D011220 Pralidoxime Compounds Various salts of a quaternary ammonium oxime that reconstitute inactivated acetylcholinesterase, especially at the neuromuscular junction, and may cause neuromuscular blockade. They are used as antidotes to organophosphorus poisoning as chlorides, iodides, methanesulfonates (mesylates), or other salts. 2-PAM Compounds,Pyridine Aldoxime Methyl Compounds,2 PAM Compounds,Compounds, 2-PAM,Compounds, Pralidoxime
D011725 Pyridines Compounds with a six membered aromatic ring containing NITROGEN. The saturated version is PIPERIDINES.
D011726 Pyridinium Compounds Derivatives of PYRIDINE containing a cation C5H5NH or radical C5H6N. Compounds, Pyridinium
D001921 Brain The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM. Encephalon
D002619 Chemical Warfare Agents Chemicals that are used to cause the disturbance, disease, or death of humans during WARFARE. Agents, Chemical Warfare,Warfare Agents, Chemical,Agent, Chemical Warfare,Chemical Warfare Agent,Warfare Agent, Chemical

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