Derivatives of the Triazoloquinazoline Adenosine Antagonist (CGS15943) Are Selective for the Human A<sub>3</sub> Receptor Subtype
作者:Yong-Chul Kim、Xiao-duo Ji、Kenneth A. Jacobson
DOI:10.1021/jm960482i
日期:1996.1.1
[3H]CGS 21680 ([3H]-2-[[4-(2-carboxy ethyl)phenyl]ethylaminol]-5'-(N- ethyl- carbamoyl)adenosine), respectively. Affinity was determined at cloned human A3 receptors using [125I]AB-MECA (N6-(4-amino-3-iodobenzyl)-5'-(N-methylcarbamoyl)adenosine). A series of straight chain alkyl amides demonstrated that the optimal chain length occurs with the 5-N-propionyl derivative, 3, which had a Ki value of 7.7 nM
腺苷拮抗剂 9-氯-2-(2-呋喃基)[1,2,4]三唑并[1,5-c]喹唑啉-5-胺 (CGS15943) 以高亲和力 (Ki = 14 nM) 与人 A3 受体结合),但它对大鼠 A3 受体缺乏亲和力。制备了 5-氨基的酰化衍生物和其他修饰,以努力提供 A3 亚型选择性。使用 [3H]-(R)-PIA ([3H]-(R)-N6-(苯基异丙基)-腺苷) 和 [3H]CGS 21680 ([3H]CGS 21680) 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]-2-[[4-(2-羧基乙基)苯基]乙基氨基]-5'-(N-乙基-氨基甲酰基)腺苷)。使用[125I]AB-MECA(N6-(4-氨基-3-碘苄基)-5'-(N-甲基氨基甲酰基)腺苷)测定克隆的人A3受体的亲和力。一系列直链烷基酰胺证明 5-N-丙酰衍生物 3 具有最佳链长,其对人 A3 受体的 Ki 值为 7