Design of drugs involving receptor-ligand-DNA interactions
申请人:——
公开号:US20020064790A1
公开(公告)日:2002-05-30
It has been discovered that the degree of hormonal activity of candidate ligands correlates better with degree of fit into DNA than with the strength of receptor binding, and that the receptors in the steroid/thyroid hormone/vitamin A and D family alter the physiochemical properties of DNA and in concert with other transcription factors facilitate insertion of the ligand into DNA. As a result, the magnitude of the response is a function of the structure of the ligand as it related to insertion and fit into the DNA and the specificity of the response is a function of the stereochemistry of the receptor through binding to both the ligand and to the DNA. Based on these discoveries, a method is described herein for identifying drugs having increased activity as compared with the natural ligand for receptors such as the estrogenic receptors.
人们发现,候选配体的荷尔蒙活性程度与 DNA 的匹配程度的相关性比与受体结合强度的相关性要好,类固醇/甲状腺激素/维生素 A 和 D 家族中的受体会改变 DNA 的理化性质,并与其他转录因子一起促进配体插入 DNA。因此,反应的大小是配体结构的函数,因为它与插入和适合 DNA 有关,而反应的特异性则是受体通过与配体和 DNA 结合的立体化学的函数。基于这些发现,本文介绍了一种方法,用于鉴定与雌激素受体等受体的天然配体相比活性更强的药物。
Non-estrogenic metabolites of diethylstilbestrol produced by prostaglandin synthase mediated metabolism
作者:Gisela H. Degen、John A. McLachlan
DOI:10.1016/0039-128x(83)90038-7
日期:1983.9
Incubation of trans-diethylstilbestrol (E-DES) with prostaglandin synthase (PGS) in vitro leads to the formation of the metabolites cis, cis-dienestrol (Z,Z-DIES) and cis-diethylstilbestrol (Z-DES) which have considerably decreased estrogenic activity compared to their parent compound. Incubations of (14C)-E-DES with PGS in the presence of arachidonic acid (AA) predominantly catalyze formation of the oxidative metabolite Z,Z-DIES, accompanied by the formation of protein bound radioactivity. Inhibition of peroxidative metabolism through addition of indomethacin or absence of AA favors isomerization of E-DES to Z-DES without concomitant formation of protein bound radioactivity. Isomerization is inhibited by phenidone (1-phenyl-3-pyrazolidone). Since PGS activity is present in uterine tissue, these pathways may play a role in the metabolism of DES in its target tissue.
BAGNATI, RENZO;GRAZIA, CASTELLI MARIA;AIROLDI, LUISA;PALEOLOGO, ORIUNDI M+, J. CHROMATOGR. BIOMED. APPL., 527,(1990) N, C. 267-278