The influence of three newly developed bispyridinium antinicotinic compounds (the non‐oximes MB408, MB442 and MB444) on the therapeutic efficacy of a standard antidotal treatment (atropine in combination with an oxime) of acute poisoning by the organophosphorus nerve agents tabun and soman was studied in mice. The therapeutic efficacy of atropine in combination with an oxime with or without one of the bispyridinium non‐oximes was evaluated by determination of the LD50 values of the nerve agents and measurement of the survival time after supralethal poisoning. Addition of all the tested non‐oximes increased significantly the therapeutic efficacy of atropine in combination with an oxime against tabun poisoning. They also positively influenced the number of surviving mice 6 hr after supralethal poisoning with tabun. However, they were only slightly effective for the treatment of soman poisoning. The benefit of the tested bispyridinium non‐oximes was dose‐dependent. To conclude, the addition of bispyridinium non‐oximes to the standard antidotal treatment of acute poisoning with tabun was beneficial regardless of the chosen non‐oxime, but only slightly beneficial in the case of soman poisoning.
Basic and Clinical Pharmacology & Toxicology – Wiley
Published: Jan 1, 2018
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