Synthesis of Novel Se-Substituted Selenocysteine Derivatives as Potential Kidney Selective Prodrugs of Biologically Active Selenol Compounds: Evaluation of Kinetics of β-Elimination Reactions in Rat Renal Cytosol
作者:Ioanna Andreadou、Wiro M. P. B. Menge、Jan N. M. Commandeur、Eduard A. Worthington、Nico P. E. Vermeulen
DOI:10.1021/jm950750x
日期:1996.1.1
Eighteen Se-substituted selenocysteine derivatives were synthesized as potential kidney selective prodrugs which can be activated by renal cysteine conjugate beta-lyase to selenium-containing chemoprotectants or antitumor agents. Selenocysteine derivatives with aliphatic and benzylic Se-substituents were synthesized by reducing selenocystine to selenocysteine followed by a reaction with the corresponding
合成了十八种硒取代的硒代半胱氨酸衍生物,作为潜在的肾脏选择性前药,可以通过肾脏半胱氨酸共轭β-裂解酶将其激活为含硒的化学保护剂或抗肿瘤剂。通过将硒代半胱氨酸还原为硒代半胱氨酸,然后与相应的烷基和苄基卤化物反应,可以合成具有脂肪族和苄基硒取代基的硒代半胱氨酸衍生物。通过β-氯丙氨酸与取代的苯硒醇化合物反应合成具有芳香族Se取代基的硒代半胱氨酸衍生物,后者是通过用NaBH4还原取代的二苯二硒化物而形成的。研究了大鼠肾脏细胞溶胶中硒代半胱氨酸缀合物的β-消除反应的酶动力学参数(表观Km和Vmax)。结果表明,硒取代的L-硒代半胱氨酸结合物是肾半胱氨酸结合物β-裂合酶的极好底物,如表观Km低和Vmax值高所表明的。苄基取代的Se-共轭物似乎比苯基和烷基取代的Se-共轭物是更好的底物。相应的L-半胱氨酸S-缀合物太差,无法获得合适的酶动力学。最近,提出了通过肾脏半胱氨酸缀合物β-裂合酶局部激活半胱氨