Proluciferin Acetals as Bioluminogenic Substrates for Cytochrome P450 Activity and Probes for CYP3A Inhibition
作者:Poncho L. Meisenheimer、H. Tetsuo Uyeda、Dongping Ma、Mary Sobol、Mark G. McDougall、Cesear Corona、Dan Simpson、Dieter H. Klaubert、James J. Cali
DOI:10.1124/dmd.111.041541
日期:2011.12
enzyme(-1), respectively. The proluciferin acetal was used as a probe substrate to measure IC(50) values of known inhibitors against recombinant CYP3A4 or human liver microsomes. IC(50) values for the known inhibitors correlate strongly with IC(50) values calculated from the traditional high-performance liquid chromatography-based probe substrate testosterone. Luciferin acetals are rapidly oxidized to unstable
细胞色素P450(P450)分析使用探针底物来询问新化学实体对P450酶的影响。我们报告了合成和研究的生物发光萤光素缩醛底物家族,被P450酶氧化形成萤光素酶底物。针对一组纯化的P450酶筛选萤光素缩醛。特别是,一种荧光素素乙缩醛已证明对CYP3A4催化敏感且选择性地氧化为荧光素酯-K(m)和k(cat)为2.88μM和5.87 pmol代谢物·min(-1)·pmol酶(-1)分别。荧光素缩醛用作探针底物,以测量已知的针对重组CYP3A4或人肝微粒体的抑制剂的IC(50)值。已知抑制剂的IC(50)值与从传统的基于高效液相色谱的探针底物睾丸激素计算得出的IC(50)值密切相关。荧光素乙缩醛被CYP3A迅速氧化为不稳定的半原酸酯,从而产生荧光素酯,因此有利于简单的快速CYP3A生物发光分析。