当前位置： SCI文献检索 > JOURNAL OF MEDICINAL CHEMISTRY期刊下所有文献 > Nucleoside transport inhibitors: structure-activity relationships for pyrimido[5,4-d]pyrimidine derivatives that potentiate pemetrexed cytotoxicity in the presence of α1-acid glycoprotein.

Nucleoside transport inhibitors: structure-activity relationships for pyrimido[5,4-d]pyrimidine derivatives that potentiate pemetrexed cytotoxicity in the presence of α1-acid glycoprotein.

Abstract：

:Membrane transport of nucleosides or nucleobases is mediated by transporters including the equilibrative nucleoside transporters (ENTs), and resistance to antitumor antimetabolite drugs may arise via salvage of exogenous purine or pyrimidine nucleosides or nucleobases by ENT transporters. The therapeutic utility of dipyridamole (3), a potent ENT inhibitor, is compromised by binding to the serum protein α(1)-acid glycoprotein (AGP). Derivatives and prodrugs of the ENT inhibitor 4,8-bis[(3,4-dimethoxybenzyl)amino]-2,6-bis[(2-hydroxypropyl)amino]pyrimido[5,4-d]pyrimidine (6, NU3108) are described, with improved in vivo pharmacokinetic properties and reduced AGP binding relative to dipyridamole. The mono- and diglycine carbamate derivatives were at least as potent as 6 and showed no reduction in potency by AGP. In a [(3)H]thymidine incorporation assay, employing COR-L23 cells, the diastereoisomers of 6 (IC(50) = 26 nM) exhibited activity comparable with 3 (IC(50) = 15 nM). The monophenyl carbamate and mono-4-methoxyphenyl carbamate exhibited the best ENT-inhibitory activity in the COR-L23 assay (IC(50) = 8 and 4 nM, respectively). All of the new prodrugs were also highly effective at reversing thymidine/hypoxanthine rescue from pemetrexed cytotoxicity in the COR-L23 cell line.

journal_name

J Med Chem

journal_title

Journal of medicinal chemistry

authors

Saravanan K,Barlow HC,Barton M,Calvert AH,Golding BT,Newell DR,Northen JS,Curtin NJ,Thomas HD,Griffin RJ

doi

10.1021/jm101493z

subject

Has Abstract

pub_date

2011-03-24 00:00:00

pages

1847-59

issue

6

eissn

0022-2623

issn

1520-4804

journal_volume

54

pub_type

杂志文章

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