Bromal-derived tetrahydro-β-carbolines as neurotoxic agents: chemistry, impairment of the dopamine metabolism, and inhibitory effects on mitochondrial respiration
作者:Gerhard Bringmann、Doris Feineis、Ralph Brückner、Michael Blank、Karl Peters、Eva-Maria Peters、Heinz Reichmann、Bernd Janetzky、Christoph Grote、Hans-Willi Clement、Wolfgang Wesemann
DOI:10.1016/s0968-0896(00)00073-0
日期:2000.6
neurotoxin 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP, 6), were found to have a common feature of inducing a severe impairment of the nigrostriatal dopamine metabolism and inhibiting complex I of the mitochondrial respiratory chain highly selectively. Within the series of compounds tested, 1-tribromomethyl-1,2,3,4-tetrahydro-beta-carboline ('TaBro', 5), which was prepared in high yields from the biogenic
哺乳动物生物碱色氨酸(1)和依来宁(2)以及高度卤化(X = F,Cl,Br)四氢β-咔啉(THbetaCs)3-5,其结构类似于多巴胺能神经毒素1-甲基-4发现-苯基-1,2,3,6-四氢吡啶(MPTP,6)具有共同的特征,可导致黑纹状体多巴胺代谢严重受损,并高度选择性地抑制线粒体呼吸链复合物I。在一系列测试化合物中,1-三溴甲基-1,2,3,4-四氢-β-咔啉('TaBro',5)是由生物胺色胺('Ta',7)高产率制备的以及通过Pictet-Spengler环化反应产生的非天然醛溴(“ Bro”,8),在体外和体内都是最有效的毒素。如通过伏安法对大鼠进行的测量所证明的那样,对于所有研究的THbetaCs 1-5,单次剂量10 microg的鼻内施用导致纹状体中的多巴胺能活性显着降低,其中TaBro的作用最强(5)。使用大鼠脑匀浆,再次显示5(IC50 = 200 microM)及其脱氢卤化产物11(IC50