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Supraspinal D_2 receptor involved in antinociception induced by l-tetrahydropalmatine

机译:Supraaspinal D_2受体参与l-四氢巴马汀诱导的抗伤害感受

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AIM: To study the role of dopamine (DA) receptors in l-tetrahydropalmtine (l-THP)-induced antinocicep- tion. METHODS: The intraperitoneal (ip) and intrathecal (ith) injections were used to give the drugs. The tail-flick test was used to assess the nociceptive Threshold of rats. RESULTS: By ip injection. l-THP (10,20,40 mg·kg~-1) as well as D_2 receptor antagonist spiperone (1,2,3 mg·kg~-1) produced dose-dependent antinociaceptive effects on the nocicep- tion of rats, while D_2 receptor agonist quinpirole, D_1 receptor agonist SKF38393, and D_1 receptor antagonist Sch-23390 showed no antinociception.
机译:目的:研究多巴胺(DA)受体在l-四氢巴马汀(l-THP)诱导的止痛药中的作用。方法:腹膜内(ip)和鞘内(ith)注射用于给药。甩尾试验用于评估大鼠的伤害阈值。结果:通过ip注入。 l-THP(10,20,40 mg·kg〜-1)和D_2受体拮抗剂spiperone(1,2,3 mg·kg〜-1)对大鼠的结局产生剂量依赖性的抗伤害作用, D_2受体激动剂喹吡罗,D_1受体激动剂SKF38393和D_1受体拮抗剂Sch-23390均未显示伤害感受。

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