Acta Med. 2004, 47: 107-109

In Vitro Reactivation of Acetylcholinesterase Inhibited by Cyclosarin Using Bisquaternary Pyridinium Aldoximes K005, K033, K027 and K048

Kamil Kuča, Lucie Ševelová-Bartošová, Gabriela Krejčová-Kunešová

Purkyně Military Medical Academy, Department of Toxicology, Hradec Králové, Czech Republic

Received February 1, 2004
Accepted April 1, 2004

We have tested four new bisquaternary pyridinium acetylcholinesterase (AChE; EC reactivators – K005 (1,3–bis(2–hydroxyiminomethylpyridinium) propane dibromide), K033 (1,4–bis(2–hydroxyiminomethylpyridinium) butane dibromide), K027 (1–(4–hydroxyiminomethylpyridinium)-3–(4–carbamoylpyridinium) propane dibromide) and K048 (1–(4–hydroxyiminomethylpyridinium)-4–(4–carbamoylpyridinium) butane dibromide) as the potential reactivators of AChE inhibited by cyclosarin. Their reactivation potencies were studied using standard in vitro reactivation test. Rat brain homogenate was used as the source of the enzyme. Oxime K033 seems to be the most potent reactivator of cyclosarin-inhibited AChE. Its reactivation potency is significantly higher than the efficacy of all other tested AChE reactivators.


This work was supported by the grants of Ministry of Defense No. OBVLAJEP20032.


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