The antinociceptive effect of FR140423 in mice: involvement of spinal α2-adrenoceptors

The antinociceptive effect of FR140423 in mice: involvement of spinal α2-adrenoceptors
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FR140423 对小鼠的镇痛作用:脊髓 α2-肾上腺素受体的参与

DOI:
10.1016/s0014-2999(00)00402-7
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发表时间:
2000
影响因子:
5
通讯作者:
T. Goto
T. Goto
中科院分区:
医学2区
文献类型:
--
作者:
T. Ochi;T. Goto

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我们研究了脊髓去甲肾上腺素能系统在FR 140423,3-(二氟甲基)-1-(4-甲氧基苯基)-5-[4-(甲基亚磺酰基)苯基]吡唑的抗伤害效应中的作用,通过在小鼠和各种肾上腺素受体拮抗剂中使用夹尾试验。i.t.非选择性α-受体拮抗剂酚妥拉明和α2-受体拮抗剂育亨宾可完全阻断α1-受体拮抗剂哌唑嗪和β-受体拮抗剂普萘洛尔的抑制作用。FR 140423以5-80 mg/kg的剂量经口给药产生剂量依赖性抗伤害感受作用,ED 50值为19 mg/kg。这种抗伤害感受被i.t.消除了,但不是静脉注射,注射酚妥拉明和育亨宾(10 μg/小鼠)。上述结果提示,FR 140423对机械伤害性刺激的镇痛作用与吗啡和可乐定的镇痛作用一样,也与脊髓α2肾上腺素能受体有关。
We investigated the role of the spinal noradrenergic system in the antinociceptive effect of FR140423, 3-(difluoromethyl)-1-(4-methoxyphenyl)-5-[4-(methylsulfinyl)phenyl]pyrazole, by using the tail-pinch test in mice and various adrenoceptor antagonists. The antinociceptive effect of FR140423 injected i.t. was completely abolished by co-administration of the non-selective α-adrenoceptor antagonist phentolamine and the α2-adrenoceptor antagonist yohimbine but not by the α1-adrenoceptor antagonist prazosin or the β-adrenoceptor antagonist propranolol. Oral administration of FR140423, at doses of 5–80 mg/kg, produced a dose-dependent antinociceptive effect with an ED50value of 19 mg/kg. This antinociception was abolished by i.t., but not i.c.v., injection of phentolamine and yohimbine (10 μg/mouse). These results suggest that α2-adrenoceptors in the spinal cord are involved in the antinociceptive effect of FR140423 against mechanical noxious stimulus as they are in the effect of morphine and clonidine.
DOI: --
发表时间: 1995
期刊: The Journal of pharmacology and experimental therapeutics
影响因子: --
作者:
T. L. Yaksh;J. W. Pogrel;Youn-Woo Lee;S. Chaplan
通讯作者: T. L. Yaksh;J. W. Pogrel;Youn-Woo Lee;S. Chaplan
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发表时间: 1987-07
期刊: The Journal of pharmacology and experimental therapeutics
影响因子: --
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DOI: --
发表时间: 1996
期刊: The Journal of pharmacology and experimental therapeutics.
影响因子: --
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