PD134308 and PD135158 are highly selective CCK-B receptor antagonists and were used to investigate the role of CCK-B receptors in aversive responding in rodent and primate models of anxiety. Both PD134308 and PD135158 were as effective as diazepam to antagonise aversive behaviour in the mouse light/dark discrimination test, in the rat social interaction and elevated X-maze tests, and in a marmoset 'human threat' model. However, the CCK-B antagonists were much more potent than diazepam and their effects were recorded over an extensive dose range. Furthermore, even at high doses, sedation or muscle relaxation was not observed and anxiogenesis was absent after withdrawal from a subchronic treatment. In contrast, withdrawal from drugs of abuse, diazepam, alcohol, cocaine and nicotine was associated with a withdrawal anxiogenesis that was completely prevented by PD134308 and PD135158. It is concluded that CCK-B receptors are involved in aversive-anxiety responding and that CCK-B receptor antagonists may provide a novel and improved approach to the treatment of anxiety and withdrawal from drugs of abuse.

译文

PD134308和PD135158是高度选择性的cck-b受体拮抗剂,用于研究cck-b受体在啮齿动物和灵长类动物焦虑模型中的厌恶反应中的作用。PD134308和PD135158在小鼠的光/暗辨别测试,大鼠的社交互动和X迷宫测试以及mar猴的 “人类威胁” 模型中均与地西epa一样有效地对抗厌恶行为。然而,cck-b拮抗剂比地西epa有效得多,并且在广泛的剂量范围内记录了它们的作用。此外,即使在高剂量下,也未观察到镇静或肌肉松弛,并且在从亚慢性治疗中退出后也没有焦虑发生。相反,从滥用药物,地西epa,酒精,可卡因和尼古丁的戒断与戒断焦虑有关,PD134308和pd135158完全阻止了戒断焦虑发生。结论是cck-b受体参与了厌恶性焦虑反应,cck-b受体拮抗剂可能为治疗焦虑和戒断滥用药物提供了一种新的改进方法。

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