Siddiqi Suhaib M, Ji Xiao-Duo, Melman Neli, Olah Mark E, Jain Rahul, Evans Patricia, Glashofer Marc, Padgett William L, Cohen Louis A, Daly John W, Stiles Gary L, Jacobson Kenneth A
Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes, and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892.
Departments of Medicine and Pharmacology, Duke University Medical Center, Durham, NC 27710.
Nucleosides Nucleotides. 1996;15(1-3):693-717. doi: 10.1080/07328319608002416.
The binding affinities at rat A, A, and A adenosine receptors of a wide range of heterocyclic derivatives have been determined. Mono-, bi-, tricyclic and macrocyclic compounds were screened in binding assays, using either [H]PIA or [H]CGS 21680 in rat brain membranes or [I]AB-MECA in CHO cells stably transfected with rat A receptors. Several new classes of adenosine antagonists ( 5-oxoimidazopyrimidines and a pyrazoloquinazoline) were identified. Various sulfonylpiperazines, 11-hydroxytetrahydrocarbazolenine, 4H-pyrido[1,2-a]pyrimidinone, folic acid, and cytochalasin H and J bound to A receptors selectively. Moreover, cytochalasin A, which bound to A adenosine receptors with K value of 1.9 μM, inhibited adenylyl cyclase in rat adipocytes, but not via reversible A receptor binding.
已测定了一系列杂环衍生物对大鼠A1、A2A和A2B腺苷受体的结合亲和力。在结合试验中,使用[3H]PIA或[3H]CGS 21680作用于大鼠脑膜,或使用[125I]AB-MECA作用于稳定转染大鼠A2A受体的CHO细胞,对单环、双环、三环和大环化合物进行了筛选。鉴定出了几类新的腺苷拮抗剂(5-氧代咪唑并嘧啶和吡唑并喹唑啉)。各种磺酰基哌嗪、11-羟基四氢咔唑啉、4H-吡啶并[1,2-a]嘧啶酮、叶酸以及细胞松弛素H和J选择性地与A2A受体结合。此外,细胞松弛素A以1.9 μM的K值与A1腺苷受体结合,可抑制大鼠脂肪细胞中的腺苷酸环化酶,但并非通过可逆性A1受体结合实现。