The interaction of verapamil and norverapamil with beta-adrenergic receptors.

The interaction of verapamil and norverapamil with beta-adrenergic receptors.
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维拉帕米和去甲维拉帕米与β-肾上腺素能受体的相互作用。

DOI:
10.1161/01.cir.72.3.547
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发表时间:
1985
期刊:
影响因子:
37.8
通讯作者:
Lai,CY
Lai,CY
中科院分区:
医学1区
文献类型:
--
作者:
Feldman,RD;Park,GD;Lai,CY

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为了确定钙通道阻滞剂对β-肾上腺素能受体的作用,我们通过放射性配体结合测定研究了维拉帕米、地尔硫卓和硝苯地平与人淋巴细胞β2-肾上腺素能受体和大鼠心肌β1-肾上腺素能受体的相互作用。我们还通过测量腺苷酸环化酶活性来确定这些相互作用的功能后果。体外放射配体结合研究表明,维拉帕米对淋巴细胞 β2 受体的 Ki 为 32 +/- 4 microM。地尔硫卓和硝苯地平的效力要弱得多。在腺苷酸环化酶活性的研究中,维拉帕米被证明可作为竞争性 β 受体拮抗剂。此外,去甲维拉帕米(维拉帕米的活性代谢物)在所研究的所有钙通道阻滞剂中对 β 受体的亲和力最高(Ki = 4.2 +/- 0.8 microM)。六名正常受试者服用维拉帕米 1 周后,淋巴细胞中异丙肾上腺素刺激的腺苷酸环化酶活性比基础活性从 60 +/- 4% 增加到 83 +/- 10%(p 小于 0.05)。这与淋巴细胞β受体对激动剂的亲和力增加相关,表现为异丙肾上腺素抑制[125I]碘氰吲哚洛尔结合的IC50从240+/-20降低至170+/-10nM(p小于0.05)。此外,维拉帕米治疗 1 周后,血浆去甲肾上腺素水平从 206 +/- 58 降至 92 +/- 18 pg/ml(p 小于 0.05)。我们的数据表明,维拉帕米在体外影响淋巴细胞β受体,长期给药可通过降低血浆儿茶酚胺水平直接或间接调节淋巴细胞β受体功能。
To determine the effect of calcium-channel blockers on beta-adrenergic receptors, we studied the interactions of verapamil, diltiazem, and nifedipine with both human lymphocyte beta 2-adrenergic receptors and rat myocardial beta 1-adrenergic receptors by means of radioligand binding assays. We also determined the functional consequences of these interactions by measuring adenylate cyclase activity. Radioligand binding studies in vitro demonstrated a Ki of verapamil for the lymphocyte beta 2-receptor of 32 +/- 4 microM. Diltiazem and nifedipine were much less potent. In studies of adenylate cyclase activity, verapamil was shown to act as a competitive beta-receptor antagonist. Also, norverapamil, the active metabolite of verapamil, had the highest affinity for the beta-receptor of any of the calcium-channel blockers studied (Ki = 4.2 +/- 0.8 microM). After 1 week of verapamil administration in six normal subjects, isoproterenol-stimulated adenylate cyclase activity in lymphocytes was increased from 60 +/- 4% to 83 +/- 10% over basal activity (p less than .05). This was associated with an increase in lymphocyte beta-receptor affinity for agonist as represented by the decrease in the IC50 for isoproterenol inhibition of [125I] iodocyanopindolol binding from 240 +/- 20 to 170 +/- 10 nM (p less than .05). Additionally, plasma norepinephrine levels were reduced from 206 +/- 58 to 92 +/- 18 pg/ml with 1 week of verapamil treatment (p less than .05). Our data suggest that verapamil affects lymphocyte beta-receptors in vitro and with long-term administration regulates lymphocyte beta-receptor function either directly or indirectly via a reduction in plasma catecholamine levels.
维拉帕米竞争性抑制大鼠心肌中的α1-肾上腺素能受体和毒蕈碱受体,但不抑制β-肾上腺素能受体。
DOI: 10.1097/00005344-198205000-00025
发表时间: 1982
影响因子: 3
作者:
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通讯作者: Insel,PA
普萘洛尔可增强严重焦虑患者的 β 受体功能减退
DOI: 10.1016/s0140-6736(83)90855-3
发表时间: 1983
期刊: The Lancet
影响因子: --
作者:
D. Lima;P. Turner
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维拉帕米和其他钙通道阻滞剂与α1-和α2-肾上腺素能受体的相互作用。
DOI: 10.1161/01.res.52.2.226
发表时间: 1983
影响因子: 20.1
作者:
Motulsky,HJ;Snavely,MD;Hughes,RJ;Insel,PA
通讯作者: Insel,PA
DOI: --
发表时间: 1979
期刊: Circulation
影响因子: 37.8
作者:
M. Olivari;C. Bartorelli;A. Polese;C. Fiorentini;P. Moruzzi;M. Guazzi
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肾上腺素能受体的调节
DOI: 10.1007/978-94-009-5822-7_5
发表时间: 1981
期刊: Applied optics
影响因子: 1.9
作者:
A. O. Davies;R. Lefkowitz
通讯作者: R. Lefkowitz