Overcoming the Genotoxicity of a Pyrrolidine Substituted Arylindenopyrimidine As a Potent Dual Adenosine A<sub>2A</sub>/A<sub>1</sub> Antagonist by Minimizing Bioactivation to an Iminium Ion Reactive Intermediate
作者:Heng-Keang Lim、Jie Chen、Carlo Sensenhauser、Kevin Cook、Robert Preston、Tynisha Thomas、Brian Shook、Paul F. Jackson、Stefanie Rassnick、Kenneth Rhodes、Vedwatee Gopaul、Rhys Salter、Jose Silva、David C. Evans
DOI:10.1021/tx1004437
日期:2011.7.18
endocyclic iminium ion, aldehyde, epoxide, and α,β-unsaturated keto reactive intermediates from the detection of cyano, oxime, and glutathione conjugates by data-dependent high resolution accurate mass measurements. Collision-induced dissociation of these conjugates provided evidence for bioactivation of the pyrrolidine ring of 1. The epoxide and α,β-unsaturated keto reactive intermediates were unlikely
2-氨基-4-苯基-8-吡咯烷-1-基甲基-茚并[1,2-d]嘧啶-5-酮(1)是来自茜素嘧啶的新型有效的选择性双重A 2A / A 1腺苷受体拮抗剂仅在代谢激活后才能在Ames和小鼠淋巴瘤L5178Y分析中确定为具有遗传毒性的系列。化合物1被鉴定为鼠伤寒沙门氏菌测试菌株TA1537中的移码诱变剂,与载体对照相比,回复菌落的剂量依赖性显着增加表明。放射性与DNA的代谢活化相关的不可逆共价结合,回收率1以及其被共价修饰的DNA酸水解后的烯胺代谢物,以及氰化物离子和甲氧基胺对DNA的共价结合的保护,表明TA1537菌株的移码突变涉及共价结合,而不是简单地嵌入DNA。通过依赖于数据的高分辨率精确质量测量,通过检测氰基,肟和谷胱甘肽共轭物,将化合物1生物活化为环内亚胺离子,醛,环氧化物和α,β-不饱和酮反应性中间体。这些缀合物的碰撞诱导解离为1的吡咯烷环的生物活化提供了证据。环氧化物和α,β-不饱