New Safe Method for Preparation of Sarin-Exposed Human Erythrocytes Acetylcholinesterase Using Non-Toxic and Stable Sarin Analogue Isopropyl p-Nitrophenyl Methylphosphonate and its Application to Evaluation of Nerve Agent Antidotes
作者:Hikoto Ohta、Takeshi Ohmori、Shinichi Suzuki、Hiroshi Ikegaya、Koichi Sakurada、Takehiko Takatori
DOI:10.1007/s11095-006-9123-1
日期:2006.12
A non-toxic and stable sarin analogue, isopropyl p-nitrophenyl methylphosphonate (INMP), was synthesized for safe preparation of sarin-exposed acetylcholinesterase (AChE). This agent was stable for years, able to be handled in an ordinary laboratory without special care, and its 50% inhibitory concentration (IC50) on 0.04 U/ml human erythrocytes AChE was 15 nM. This reagent was thought to be especially useful since it enables experiments that require sarin-inhibited AChE, such as the development of antidotes for sarin, in a usual laboratory. To demonstrate the usefulness of this method, 40 known and novel pyridinealdoxime methiodide (PAM)-type oxime antidotes were synthesized, and their reactivation activities to INMP-exposed AChE and structure–activities correlation were studied. Among the antidotes tested in this experiment except for 2-PAM, the compound found to have the highest reactivation activity, was the novel hydrophobic 2-PAM-type compound, 2-[(hydroxyimino)methyl]-1-[4-(tert-butyl)benzyl] pyridinium bromide.
一种无毒且稳定的沙林类似物异丙基对硝基苯基甲基磷酸酯(INMP)被合成,用于安全制备沙林暴露的乙酰胆碱酯酶(AChE)。该试剂在数年内保持稳定,可以在普通实验室中处理,无需特殊护理,其对0.04 U/ml人类红细胞AChE的50%抑制浓度(IC50)为15 nM。该试剂被认为特别有用,因为它能够在普通实验室中进行需要沙林抑制AChE的实验,例如沙林解毒剂的开发。为了证明该方法的有效性,合成了40种已知和新型的吡啶醛肟(潘)类解毒剂,并研究了它们对INMP暴露的AChE的再活化活性及其结构–活性相关性。在此次实验中测试的解毒剂中,除了2-PAM外,发现具有最高再活化活性的化合物是一种新型的疏水性2-PAM类化合物,即2-[(羟亚胺)甲基]-1-[4-(叔丁基)苯基]吡啶溴化物。