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Original Articles

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

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Pages 1431-1440 | Received 06 Apr 2005, Accepted 24 Jun 2005, Published online: 24 Feb 2007
 

Abstract

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.

The study was supported by a grant from the Ministry of Defense (OBVLAJEP20032).

Notes

The study was supported by a grant from the Ministry of Defense (OBVLAJEP20032).

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