Synthesis and Biological Activities of Flavonoid Derivatives as A<sub>3</sub> Adenosine Receptor Antagonists
作者:Yishai Karton、Ji-long Jiang、Xiao-duo Ji、Neli Melman、Mark E. Olah、Gary L. Stiles、Kenneth A. Jacobson
DOI:10.1021/jm950923i
日期:1996.1.1
vs rat A1 or A2A receptors. The 2-styryl-6-propoxy derivative, 20, of the furanochromone visnagin was 30-fold selective for human A3 receptors vs either rat A1 or A2A receptors. Several of the more potent derivatives effectively antagonized the effects of an agonist in a functional A3 receptor assay, i.e. inhibition of adenylyl cyclase in CHO cells expressing cloned rat A3 receptors. In conclusion,
广泛的植物化学物质筛选表明,某些黄酮和黄酮醇衍生物对 A3 腺苷受体具有相对较高的亲和力,Ki 值 > 或 = 1 microM (Ji et al. J. Med. Chem. 1996, 39, 781-788 )。我们进一步修饰了黄酮结构,以实现对克隆人脑 A3 受体的一定程度的选择性,这是在与 [125I]AB-MECA[N6-(4-amino-3-iodobenzyl)adenosine-5'-( N-甲基脲)]。使用 [3H]-N6-PIA ([3H]-(R)-N6-苯基异丙基腺苷) 和 [3H]CGS21680 [[3H]-2-[[4] 在大鼠脑 A1 和 A2a 受体的放射性配体结合测定中确定亲和力分别为-(2-羧乙基)苯基]乙基氨基]-5'-(N-乙基氨基甲酰+++)腺苷]。黄酮醇高良姜素的三乙醚和三丙醚衍生物 4 对人 A3 受体的 Ki 值为 0.3 - 0.4 microM。