Molecular modeling of Mannich phenols as reactivators of human acetylcholinesterase inhibited by A-series nerve agents

Vieira, Leandro A.; Almeida, Joyce S. F. D. de; Koning, Martijn C. de; LaPlante, Steven R.; Borges, Itamar; França, Tanos C. C.

doi:10.1016/j.cbi.2023.110622

Cited by 3 publications

(1 citation statement)

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“…suggesting that, for this surrogate, the size of reactivator might be of relevance to access the phosphonylated hydroxyl group at AChE hydrolytic site. These results did not agree with previous in silico data disclosed (Malinak et al 2018;Vieira et al 2023). Both of their in silico studies indicatedthat pralidoxime (7) was not the most efficient oxime for rescuing AChE-inhibited by phosphoramidate-related nerve agents, as opposed to what our workfoundin the in vitro assay (see Table 2).…”

Section: Discussioncontrasting

confidence: 94%

Synthesis and in vitro assessment of the reactivation profile of clinically available oximes on the acetylcholinesterase model inhibited by A-230 nerve agent surrogate

Bernardo,

Borges,

Buitrago

et al. 2024

Preprint

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The risk of use of toxic chemicals for unlawful acts has been matter of concern for different governments and multilateral agencies. The Organisation for the Prohibition of Chemical Weapons (OPCW), which oversees the implementation of the Chemical Weapons Convention (CWC), considering recent events employing chemical warfare agents as means of assassination, has recently included in the CWC “Annex on Chemicals” some organophosphorus compounds that are regarded asactingin a similar fashion to the classical G- and V-series of nerve agents, inhibiting the pivotal enzyme acetylcholinesterase. Therefore, knowledge of the activity of the pyridinium oximes, the sole class of clinically available acetylcholinesterase reactivators so far, is plainly justified. In this paper, continuing our research efforts in the Medicinal Chemistry on this class of toxic chemicals, we synthesized an A-230 nerve agent surrogate and applied a modified Ellman’s assay in order to evaluate its ability to inhibit our enzymatic model, acetylcholinesterase from Electrophorus eel, and if the clinically available antidotes are able to rescue the enzyme activity for the purpose of relating the findings to the previously disclosed in silico data for the authentic nerve agent and other studies with similar A-series surrogates. Our experimental data indicates that pralidoxime is the most efficient compound for reactivation of acetylcholinesterase inhibited by A-230 surrogate, which is the opposite to the in silico data previously disclosed.

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Section: Discussioncontrasting

confidence: 94%