Probing the Mechanism of Action and Decomposition of Amino Acid Phosphomonoester Amidates of Antiviral Nucleoside Prodrugs
作者:Edward J. McIntee、Rory P. Remmel、Raymond F. Schinazi、Timothy W. Abraham、Carston R. Wagner
DOI:10.1021/jm960694f
日期:1997.10.1
are internalized by lymphocytes to the same extent as AZT by a nonsaturable process. In lymphocytes, the amino acid carbomethoxy ester phosphomonoester amidates of AZT are not significantly metabolized to either AZT or the mono-, di-, or triphosphate of AZT. The amount of active anabolite, AZT-5'-triphosphate, formed in PBMCs incubated with the AZT phosphomonoester amidates 3 and 4 was 2- and 3-fold less
结构相似的3'-叠氮基3'-脱氧胸苷(AZT)氨基磷酸酯1-6和3'-氟-3'-的外周血单核细胞(PBMC)的分解途径和体外抗HIV-1活性据报道脱氧胸苷(FLT)氨基磷酸酯7-10。AZT氨基磷酸酯在高达100 microM的浓度下对CEM细胞无细胞毒性,而FLT氨基磷酸酯9和10的CC50值分别为95.6和35.1 microM。在高达100 microM的浓度下,所有10种化合物对PBMC均无细胞毒性,并有效抑制病毒复制。特别地,AZT磷酸单酯酰胺化物4显示出与亲本核苷类似物AZT相当的抗病毒活性。对氨基酸碳甲氧基酯磷酸单酯酰胺化物的机理研究表明,它们的分解途径不同于核苷酸前药的氨基酸碳甲氧基酯芳基磷酸二酯酰胺化物的分解途径。AZT磷酸单酯酰胺化物通过不饱和过程被淋巴细胞内化到与AZT相同的程度。在淋巴细胞中,AZT的氨基酸碳甲氧基酯磷酸单酯酰胺化物不会显着代谢为AZT或AZT的单磷