Antimalarial activity of novel 4-cyano-3-methylisoquinoline inhibitors against Plasmodium falciparum: design, synthesis and biological evaluation
作者:Melissa J. Buskes、Katherine L. Harvey、Benjamin J. Richards、Robabeh Kalhor、Rebecca M. Christoff、Chamodi K. Gardhi、Dene R. Littler、Elliott D. Cope、Boris Prinz、Greta E. Weiss、Nathan J. O'Brien、Brendan S. Crabb、Leslie W. Deady、Paul R. Gilson、Belinda M. Abbott
DOI:10.1039/c5ob02517f
日期:——
drug target so we have repurposed a substituted 4-cyano-3-methylisoquinoline that has been shown to inhibit rat PKA with the goal of targeting PfPKA. We synthesised a novel series of compounds and, although many potently inhibit the growth of chloroquine sensitive and resistant strains of P. falciparum, they were found to have minimal activity against PfPKA, indicating that they likely have another target
疟疾发病机制的中心是恶性疟原虫寄生虫入侵人的红细胞。在细胞内发育和复制的每个周期之后,寄生虫会激活一种细胞程序,使其从当前的宿主细胞中逸出并入侵新的宿主细胞。这个过程的编排关键依赖于许多有组织的磷酸信号级联,这些级联由许多中央激酶介导。寄生虫激酶正以其与哺乳动物对应物足够的差异,以使其具有选择性的治疗作用,从而成为新型的抗疟疾靶标。寄生蛋白激酶A(PfPKA)在寄生虫血液阶段的细胞周期后期高表达,并已显示出可将一种重要的入侵蛋白Apical Membrane Antigen 1磷酸化。因此,该酶可能是有价值的药物靶标,因此我们重新设计了取代的4-氰基-已经显示出以靶向Pf PKA为目标的抑制大鼠PKA的3-甲基异喹啉。我们合成了一系列新化合物,尽管许多化合物有效抑制恶性疟原虫对氯喹敏感和耐药的菌株的生长,但发现它们对Pf PKA的活性极低,这表明它们可能还有另一个对寄生虫胞质分裂和侵袭重要的靶标。