Inhibition by tramadol of muscarinic receptor-induced responses in cultured adrenal medullary cells and in Xenopus laevis oocytes expressing cloned M1 receptors.

Inhibition by tramadol of muscarinic receptor-induced responses in cultured adrenal medullary cells and in Xenopus laevis oocytes expressing cloned M1 receptors.
复制标题

曲马多抑制培养的肾上腺髓质细胞和表达克隆 M1 受体的非洲爪蟾卵母细胞中毒蕈碱受体诱导的反应。

DOI:
--
复制
发表时间:
2001
影响因子:
3.5
通讯作者:
A. Shigematsu
A. Shigematsu
中科院分区:
医学2区
文献类型:
--
作者:
M. Shiraishi;K. Minami;Y. Uezono;N. Yanagihara;A. Shigematsu

文献摘要

参考文献

被引文献

相似文献

曲马多是一种广泛使用的中枢镇痛药,但其作用机制尚不完全清楚。已知毒蕈碱受体参与大脑和自主神经系统的神经元功能,并且这些受体作为中枢神经系统镇痛药物的靶标受到了广泛关注。本研究通过使用两种不同的系统(即非洲爪蟾卵母细胞表达系统和培养的牛肾上腺髓质细胞)研究曲马多对毒蕈碱受体的影响。 Tramadol (10 nM-100 microM) 抑制表达 M1 受体的卵母细胞中乙酰胆碱诱导的电流。蛋白激酶C抑制剂GF109203X虽然增加了基础电流,但对曲马多对乙酰胆碱诱导电流的抑制作用不大。另一方面,曲马多不抑制由GTP结合蛋白的直接激活剂AlF4-诱导的电流。在培养的牛肾上腺髓质细胞中,曲马多 (100 nM-100 microM) 抑制毒蕈碱诱导的环 GMP 积累。此外,曲马多抑制[3H]苯苯甲酸奎宁环酯(QNB)的特异性结合。 Scatchard 分析表明曲马多增加了表观解离常数 (Kd) 值而不改变最大结合 (Bmax),表明竞争性抑制。这些发现表明临床相关浓度的曲马多通过 QNB 结合位点抑制毒蕈碱受体功能。这可以解释曲马多的神经元功能和抗胆碱能作用。
Tramadol is a widely used, centrally acting analgesic, but its mechanisms of action are not completely understood. Muscarinic receptors are known to be involved in neuronal function in the brain and autonomic nervous system, and much attention has been paid to these receptors as targets of analgesic drugs in the central nervous system. This study investigated the effects of tramadol on muscarinic receptors by using two different systems, i.e., a Xenopus laevis oocyte expression system and cultured bovine adrenal medullary cells. Tramadol (10 nM-100 microM) inhibited acetylcholine-induced currents in oocytes expressing the M1 receptor. Although GF109203X, a protein kinase C inhibitor, increased the basal current, it had little effect on the inhibition of acetylcholine-induced currents by tramadol. On the other hand, tramadol did not inhibit the current induced by AlF4-, a direct activator of GTP-binding protein. In cultured bovine adrenal medullary cells, tramadol (100 nM-100 microM) suppressed muscarine-induced cyclic GMP accumulation. Moreover, tramadol inhibited the specific binding of [3H]quinuclidinyl benzilate (QNB). Scatchard analysis showed that tramadol increases the apparent dissociation constant (Kd) value without changing the maximal binding (Bmax), indicating competitive inhibition. These findings suggest that tramadol at clinically relevant concentrations inhibits muscarinic receptor function via QNB-binding sites. This may explain the neuronal function and anticholinergic effect of tramadol.
mRNA 和受体结合分析揭示牛肾上腺髓质中存在 M4 亚型毒蕈碱受体。
DOI: 10.1016/0922-4106(91)90003-z
发表时间: 1991
影响因子: 5
作者:
Fernando,JC;Abdallah,EA;Evinger,M;Forray,C;el-Fakahany,EE
通讯作者: el-Fakahany,EE
乙醇抑制表达脑 mRNA 的爪蟾卵母细胞中 5-羟色胺 1c 型和毒蕈碱 M1 G 蛋白相关受体的功能:蛋白激酶 C 的作用。
DOI: --
发表时间: 1994
影响因子: 3.6
作者:
Sanna,E;Dildy-Mayfield,JE;Harris,RA
通讯作者: Harris,RA
正醇和麻醉剂抑制 5-羟色胺 2A 型受体诱导的电流。
DOI: --
发表时间: 1997
期刊: The Journal of pharmacology and experimental therapeutics.
影响因子: --
作者:
Minami,K;Minami,M;Harris,RA
通讯作者: Harris,RA
DOI: --
发表时间: 1991-10
影响因子: 3.6
作者:
F. Dörje;A. Levey;M. Brann
通讯作者: F. Dörje;A. Levey;M. Brann
麻醉剂和乙醇对非洲爪蟾卵母细胞表达的毒蕈碱受体的抑制作用。
DOI: 10.1016/s0014-2999(97)01354-x
发表时间: 1997
影响因子: 5
作者:
Minami,K;Vanderah,TW;Minami,M;Harris,RA
通讯作者: Harris,RA