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首页> 外文期刊>Journal of biochemical and molecular toxicology >Preclinical Studies of Noncharged Oxime Reactivators for Organophosphate Exposure
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Preclinical Studies of Noncharged Oxime Reactivators for Organophosphate Exposure

机译:用于有机磷暴露的不带电荷肟活化剂的临床前研究

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摘要

A countermeasure that protects the brain from organophosphate toxicity is an unmet need. Few small molecule reactivators that can cross the blood brain barrier and reactivate brain acetyl cholinesterases have been reported. Herein, we describe preclinical investigations of a new class of amidine-oxime reactivator of cholinesterases with improved potency and blood brain barrier permeability. (Z)-N-((E)-1-(Dimethylamino)-2-(hydroxyimino)ethylidene)butan-1-aminium chloride, 1, is zwitterionic at physiological pH but possesses increased oxime nucleophilicity because of the adjacent amidine functionality. The amidine-oximes reported herein were observed to be nontoxic (up to 200 mg/kg in vivo) and are chemically and metabolically stable. The results presented herein show that uncharged amidine-oxime reactivators such as 1 can penetrate the blood brain barrier in animals and protect from the toxicity of nerve agent model compounds.
机译:保护大脑免受有机磷酸酯毒性影响的对策尚未得到满足。很少有能穿越血脑屏障并重新激活脑乙酰胆碱酯酶的小分子激活剂。在这里,我们描述了一种新型的胆碱酯酶am-肟再激活剂,具有增强的效力和血脑屏障通透性的临床前研究。 (Z)-N-(((E)-1-(二甲氨基)-2-(羟基亚氨基)亚乙基)丁-1-氯化铵,氯化铵1,在生理pH下为两性离子,但由于相邻的idine官能团而具有增加的肟亲核性。观察到本文报道的am肟是无毒的(体内高达200 mg / kg),并且在化学和代谢上都是稳定的。本文呈现的结果表明,不带电荷的am肟肟活化剂(例如1)可以穿透动物的血脑屏障,并保护其免受神经毒剂模型化合物的毒性。

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