Nucleosides and Nucleotides. 180. Synthesis and Antitumor Activity of Nucleosides That Have a Hydroxylamino Group Instead of a Hydroxyl Group at the 2‘- or 3‘-Position of the Sugar Moiety
作者:Akira Ogawa、Motohiro Tanaka、Takuma Sasaki、Akira Matsuda
DOI:10.1021/jm980466g
日期:1998.12.1
The cytotoxicity of 2'-DHAC (19) and 3'-DHAC (45) against L1210 cells in vitro was reversed by the addition of cytidine, while that of 3'-dDHAC (52) was reversed by 2'-deoxycytidine. 2'-DHAC (19) and 3'-dDHAC (52) mainly inhibited DNA synthesis in L1210 cells, while 3'-DHAC (45) inhibited RNA synthesis. We also evaluated the antitumor activities of 2'-DHAC (19) and 3'-DHAC (45) against murine Meth-A fibrosarcoma
设计和合成潜在的抗肿瘤抗代谢物2'-脱氧-2'-(羟基氨基)尿苷(15),-胞苷(19,2'-DHAC)和-腺苷(35),其区域异构体,3'-脱氧- 3'-(羟基氨基)尿苷(40)和-胞苷(45,3'-DHAC)及其2'-脱氧类似物,2',3'-二脱氧-3'-(羟基氨基)尿苷(49)和-描述了胞苷(52,3'-dDHAC)。我们使用13C NMR光谱法分别测量了15和40中羟氨基的pKa值与pH的关系,分别为2.9和3.4。我们还发现这些核苷在中性溶液中逐渐分解,而在酸性溶液中则不分解。这种分解可能与在糖部分上的氨氧基自由基的产生有关。使用L1210和KB细胞评估了这些核苷的体外细胞毒性。2' -DHAC(19)抑制L1210和KB细胞的生长,IC50值分别为1.58和1.99 microM。3'-DHAC(45)和3'-dDHAC(52)对L1210细胞也有细胞毒性,IC50值分别为4.03和1