Synthesis of Some Cryptolepine Analogues, Assessment of Their Antimalarial and Cytotoxic Activities, and Consideration of Their Antimalarial Mode of Action
作者:Onyeka Onyeibor、Simon L. Croft、Hilary I. Dodson、Mohammad Feiz-Haddad、Howard Kendrick、Nicola J. Millington、Silvia Parapini、Roger M. Phillips、Scott Seville、Steven D. Shnyder、Donatella Taramelli、Colin W. Wright
DOI:10.1021/jm040893w
日期:2005.4.1
seen (ED(90) = 21.6 mg kg(-1) day(-1)). The antimalarial mode of action of 1 appears to be similar to that of chloroquine and involves the inhibition of hemozoin formation. A number of analogues were assessed for their effects on the inhibition of beta-hematin (hemozoin) formation, and the results were compared with their antiplasmodial activities having taken account of their predicted accumulation into
已经合成了一系列隐血藤碱(1)的类似物,并对其体外抗血浆和细胞毒性特性进行了评估。几种化合物(11a,11k-m,11o,13)对恶性疟原虫(K1株)的IC(50)值<0.1μM,比1的低5-10倍,但它们的细胞毒性仅为2-4 1倍于1倍于喹啉环的卤素和1个吲哚环的卤素或硝基的化合物具有增强的抗血浆活性。在感染伯氏疟原虫的小鼠中,剂量为25 mg kg(-1)的7-溴-2-氯(11k)和2-溴-7-硝基(13)衍生物1抑制寄生虫血症> 90% (-1)对小鼠无明显毒性。2,7-Dibromocryptolepine(15)在几个剂量水平下进行了评估,并观察到了寄生虫血症的剂量依赖性抑制作用(ED(90)= 21。6 mg kg(-1)天(-1))。1的抗疟疾作用模式似乎与氯喹相似,并且涉及抑制血zo素的形成。评估了许多类似物对β-血凝素(血红蛋白)形成的抑制作用,并考虑到它们在酸性寄生虫食