作者:Thomas H. Marsilje、Marc A. Labroli、Michael P. Hedrick、Qing Jin、Joel Desharnais、Stephen J. Baker、Lata T. Gooljarsingh、Joseph Ramcharan、Ali Tavassoli、Yan Zhang、Ian A. Wilson、G.Peter Beardsley、Stephen J. Benkovic、Dale L. Boger
DOI:10.1016/s0968-0896(02)00102-5
日期:2002.8
10-formyl-DDACTHF (3) as a potential inhibitor of glycinamide ribonucleotide transformylase (GAR Tfase) and aminoimidazole carboxamide ribonucleotide transformylase (AICAR Tfase) is reported. Aldehyde 3, the corresponding gamma- and alpha-pentaglutamates 21 and 25 and related agents were evaluated for inhibition of folate-dependent enzymes including GAR Tfase and AICAR Tfase. The inhibitors were found to exhibit potent
据报道,有10-甲酰基-DDACTHF(3)作为甘氨酰胺核糖核苷酸转化酶(GAR Tfase)和氨基咪唑羧酰胺核糖核苷酸转化酶(AICAR Tfase)的潜在抑制剂的合成。评价了醛3,相应的γ-戊二酸和α-戊二酸21和25以及相关药物对叶酸依赖性酶(包括GAR Tfase和AICAR Tfase)的抑制作用。发现这些抑制剂表现出强大的细胞毒活性(CCRF-CEM IC(50)对于3 = 60nM)超过了其酶抑制能力[K(i)(3)= 6和1 microM对于大肠杆菌GAR和人AICAR Tfase,分别]。通过中等嘌呤而不是嘧啶来挽救细胞毒性,指出有效的细胞毒性活性源自选择性嘌呤生物合成的抑制和AICAR单磷酸的拯救,条件是该活性优先源自GAR,而不是AICAR Tfase抑制。包括醛3在内的有效细胞毒性化合物针对缺乏还原叶酸载体(CCRF-CEM / MTX)或叶酰聚谷氨酸合酶(CCRF-CEM