Novel Nonsubstrate Inhibitors of Human Thymidine Phosphorylase, a Potential Target for Tumor-Dependent Angiogenesis
作者:Federico Focher、Daniela Ubiali、Massimo Pregnolato、Chengxin Zhi、Joseph Gambino、George E. Wright、Silvio Spadari
DOI:10.1021/jm000037u
日期:2000.6.1
is an enzyme involved in thymidine metabolism and homeostasis, and its catalytic activity appears to play an important role in angiogenesis. Here we describe the cloning and expression of a His-tagged human TP/PD-ECGF and its assay with uracil and thymine analogues. We present the design, synthesis, and biologicalevaluation of novel 6-(phenylalkylamino)uracil derivatives which, at micromolar concentrations
Synthesis of Substituted 6-Anilinouracils and Their Inhibition of DNA Polymerase IIIC and Gram-Positive Bacterial Growth
作者:Chengxin Zhi、Zheng-Yu Long、Joseph Gambino、Wei-Chu Xu、Neal C. Brown、Marjorie Barnes、Michelle Butler、William LaMarr、George E. Wright
DOI:10.1021/jm020591z
日期:2003.6.1
Certain substituted 6-anilinouracils are potent and selective inhibitors of Gram+ bacterial DNA polymerase IIIC (pol IIIC). In addition, analogues with 3-substituents in the uracil ring have potent antibacterial activity against Gram+ organisms in culture. In an attempt to find optimal anilino substituents for pol IIIC binding and optimal 3-substituents for antibacterial activity, we have prepared several series of 3-substituted-6-aminouracils and assayed their activity against pol IIIC from Bacillus subtilis and a panel of Gram+ and Gram- bacteria in culture. The 6-(3-ethyl-4-methylanilino) group and closely related substituent patterns maximized pol IIIC inhibition potency. Among a series of 3-(substituted-butyl)-6-(3-ethyl-4-methylanilino)uracils, basic amino substituents increased pol IIIC inhibition, but decreased antibacterial activity. The most potent antibacterials were simple hydroxybutyl and methoxybutyl derivatives, and hydrophobically substituted piperidinylbutyl derivatives.
The invention relates to prodrugs of N-substituted derivatives of 6-aminouracils, 6-aminoisocytosines, guanines, and 2-aminoadenines. The N-linked substituents include an ester group that is cleaved upon administration into a subject to yield a substituent having a terminal hydroxyl group. Pharmaceutical compositions including these compounds, and methods for treating Gram-positive bacterial infections using these compounds, are also disclosed.