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Vet Hum Toxicol. 2004 Feb;46(1):15-8.

In vitro reactivation of acetylcholinesterase using the oxime K027.

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  • 1Purkyne Military Medical Academy, Department of Toxicology, PO Box 35/T, 500 01 Hradec Králové, Czech Republic.


The ability of a new bisquaternary oxime, K027 (1-[4-hydroxyiminomethylpyridinium]-3-[carbamoylpyridinium] propane dibromide), to reactivate the enzyme acetylcholinesterase (AChE) inhibited by the nerve agents Tabun, sarin and VX was evaluated. Its reactivation potency was compared to the AChE reactivators pralidoxime (2-PAM), obidoxime and HI-6; K027 seems a good reactivator of organophosphates-inhibited AChE. Its reactivation potency is lower compared to the other oximes for reactivation of sarin-inhibited AChE, but it is sufficient to significantly increase the activity of sarin-inhibited AChE. Its reactivation ability is comparable to obidoxime for reactivation of VX- and tabun-inhibited AChE and is higher than the reactivation potency of HI-6, for tabun-inhibited AChE. HI-6 is currently regarded the most promising reactivator of organophosphates-inhibited AChE.

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