Identification of 4-(N,N-dipropylamino)benzaldehyde as a potent, reversible inhibitor of mouse and human class I aldehyde dehydrogenase
作者:James Russo、Song Chung、Kristi Contreras、Brian Lian、Jon Lorenz、David Stevens、Wendy Trousdell
DOI:10.1016/0006-2952(95)00138-p
日期:1995.7
structure-function studies identified dialkylamino substituted benzaldehyde compounds as a novel class of reversible inhibitors of class I ALDH. To examine further structural requirements for inhibition, we tested a series of 4-(N,N-dialkylamino)benzaldehyde analogs as inhibitors of propanal oxidation by mouse liver and human erythrocyte class I ALDH. 4-(N,N-dipropylamino)benzaldehyde (DPAB) was identified
随着阐明了不同类别的醛脱氢酶(ALDH)酶的生理作用,特异性,可逆抑制剂的鉴定变得具有重要的药理学意义。先前的结构功能研究确定,二烷基氨基取代的苯甲醛化合物是一类新的I类ALDH可逆抑制剂。为了检查抑制的进一步结构要求,我们测试了一系列4-(N,N-二烷基氨基)苯甲醛类似物作为小鼠肝脏和人类I类红细胞ALDH的丙醛氧化抑制剂。在分光光度酶测定法中,I类ALDH将4-(N,N-二丙基氨基)苯甲醛(DPAB)鉴定为最有效,可逆的丙烷氧化抑制剂。在动力学研究中,DPAB对乙醛的醛底物表现出混合型抑制作用,苯乙醛,苯甲醛和醛基磷酰胺。DPAB对辅因子NAD表现出非竞争性抑制作用。根据狄克逊图测得的DPAB抑制常数(Ki)对小鼠ALDH为10 nM(丙醛)和77 nM(苯乙醛),对人ALDH为3 nM(丙醛)和70 nM(苯乙醛)。这些Ki值比报道的I类特异性抑制剂的Ki值低100倍。在低(<1 m