Brominated oxime nucleophiles are efficiently reactivating cholinesterases inhibited by nerve agents

. 2024 Sep ; 98 (9) : 2937-2952. [epub] 20240524

Jazyk angličtina Země Německo Médium print-electronic

Typ dokumentu časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/pmid38789714

Grantová podpora
GA21-03000S Grantová Agentura České Republiky
SV2112-2023 Univerzita Hradec Králové

Odkazy

PubMed 38789714
DOI 10.1007/s00204-024-03791-6
PII: 10.1007/s00204-024-03791-6
Knihovny.cz E-zdroje

Six novel brominated bis-pyridinium oximes were designed and synthesized to increase their nucleophilicity and reactivation ability of phosphorylated acetylcholinesterase (AChE) and butyrylcholinesterase (BChE). Their pKa was valuably found lower to parent non-halogenated oximes. Stability tests showed that novel brominated oximes were stable in water, but the stability of di-brominated oximes was decreased in buffer solution and their degradation products were prepared and characterized. The reactivation screening of brominated oximes was tested on AChE and BChE inhibited by organophosphorus surrogates. Two mono-brominated oximes reactivated AChE comparably to non-halogenated analogues, which was further confirmed by reactivation kinetics. The acute toxicity of two selected brominated oximes was similar to commercially available oxime reactivators and the most promising brominated oxime was tested in vivo on sarin- and VX-poisoned rats. This brominated oxime showed interesting CNS distribution and significant reactivation effectiveness in blood. The same oxime resulted with the best protective index for VX-poisoned rats.

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