6-Methylpurine derived sugar modified nucleosides: Synthesis and in vivo antitumor activity in D54 tumor expressing M64V- Escherichia coli purine nucleoside phosphorylase
作者:Abdalla E.A. Hassan、Reham A.I. Abou-Elkhair、William B. Parker、Paula W. Allan、John A. Secrist
DOI:10.1016/j.ejmech.2015.12.029
日期:2016.1
with M64V-E coli PNP, a mutant which was engineered to tolerate modification at the 5′-position of adenosine and its analogs, were 9-(6-deoxy-α-l-talofuranosyl)-6-methylpurine (3) [methyl(talo)-MeP-R] and 9-(α-l-lyxofuranosyl)6-methylpurine (4) [lyxo-MeP-R]. The detailed synthesis methyl(talo)-MeP-R and lyxo-MeP-R, and the evaluation of their substrate activity with 4 enzymes not normally associated with
由于2-氟腺嘌呤在肿瘤组织中的释放,磷酸氟达拉滨对表达大肠杆菌嘌呤核苷磷酸化酶(PNP)的肿瘤具有令人印象深刻的抗肿瘤活性。6-甲基嘌呤(MeP)是另一种细胞毒性腺嘌呤类似物,当全身给药时不表现出选择性,并且在涉及大肠杆菌PNP的癌症治疗的基因治疗方法中可能非常有用。MeP原型释放前药9-(2-脱氧-β- d-核呋喃糖基)-6-甲基嘌呤(1)[MeP-dR]已证明对表达大肠杆菌的肿瘤具有良好的活性。PNP,但其抗肿瘤活性由于肠道细菌产生MeP而产生的毒性而受到限制。因此,我们已着手进行一项药物化学计划,以鉴定无毒的MeP前药和非人腺苷糖苷键切割酶的组合。具有M64V-大肠杆菌PNP的两个最佳基于MeP的底物是9-(6-deoxy-α- 1 - l - talofuranosyl)-6- ,它是一种工程改造为可耐受腺苷及其类似物5'-位修饰的突变体。-甲基嘌呤(3)[甲基(talo)-MeP-R]和9-(α