摘要

Neurokinin NK1 receptor antagonists may have therapeutic potential in the treatment of anxiety and depression. Species variants in the NK1 receptor result in reduced affinity of NK1 receptor antagonists at rat and mouse NK1 receptors, making it difficult to test NK1 antagonists in traditional preclinical models of anxiety and depression. Gerbil NK1 receptors are similar in homology to the human NK1 receptor. In a companion article, we described the anxiety-like behavioral profile of gerbils on an adapted elevated plus-maze, and the ability of anxiolytic drugs to produce anti-anxiety effects in the gerbil elevated plus-maze. The aim of the present study was to determine whether oral (p.o.) administration of the NK1 receptor antagonists MK-869, L-742,694, L-733,060, CP-99,994, and CP-122,721 produced anxiolytic-like effects in the gerbil elevated plus-maze. Upon testing, all five NK1 antagonists produced anxiolytic-like effects. MK-869 (0.01-3 mg/kg) was the most potent NK1 antagonist, producing anxiolytic-like effects on percentage of open arm time, percentage of open arm entries, stretch-attend postures, and head dips at 0.03-0.3 mg/kg doses. L-742,694 (1-30 mg/kg) and L-733,060 (1-10 mg/kg) produced anxiolytic-like effects on percentage of open arm time and stretch-attend postures at 3-10 mg/kg doses. CP-99,994 (3-30 mg/kg) only produced an anxiolytic-like effect on stretch-attend postures. CP-122,721 (3-30 mg/kg) produced an anxiolytic-like effect on percentage of open arm time at 30 mg/kg. The order of potency of the NK1 antagonists to increase percentage of open arm time was very similar to their potency to block NK1 agonist-induced foot-tapping. These studies demonstrate that neurokinin NK1 receptor antagonists produce anxiolytic-like effects in a novel gerbil elevated plus-maze, and suggest that this is an appropriate model to test NK1 antagonists for preclinical anxiolytic activity.

译文

Neurokinin NK1 receptor antagonists may have therapeutic potential in the treatment of anxiety and depression. Species variants in the NK1 receptor result in reduced affinity of NK1 receptor antagonists at rat and mouse NK1 receptors, making it difficult to test NK1 antagonists in traditional preclinical models of anxiety and depression. Gerbil NK1 receptors are similar in homology to the human NK1 receptor. In a companion article, we described the anxiety-like behavioral profile of gerbils on an adapted elevated plus-maze, and the ability of anxiolytic drugs to produce anti-anxiety effects in the gerbil elevated plus-maze. The aim of the present study was to determine whether oral (p.o.) administration of the NK1 receptor antagonists MK-869, L-742,694, L-733,060, CP-99,994, and CP-122,721 produced anxiolytic-like effects in the gerbil elevated plus-maze. Upon testing, all five NK1 antagonists produced anxiolytic-like effects. MK-869 (0.01-3 mg/kg) was the most potent NK1 antagonist, producing anxiolytic-like effects on percentage of open arm time, percentage of open arm entries, stretch-attend postures, and head dips at 0.03-0.3 mg/kg doses. L-742,694 (1-30 mg/kg) and L-733,060 (1-10 mg/kg) produced anxiolytic-like effects on percentage of open arm time and stretch-attend postures at 3-10 mg/kg doses. CP-99,994 (3-30 mg/kg) only produced an anxiolytic-like effect on stretch-attend postures. CP-122,721 (3-30 mg/kg) produced an anxiolytic-like effect on percentage of open arm time at 30 mg/kg. The order of potency of the NK1 antagonists to increase percentage of open arm time was very similar to their potency to block NK1 agonist-induced foot-tapping. These studies demonstrate that neurokinin NK1 receptor antagonists produce anxiolytic-like effects in a novel gerbil elevated plus-maze, and suggest that this is an appropriate model to test NK1 antagonists for preclinical anxiolytic activity.

Elevated Plus Maze

神经 焦虑抑郁研究 实验技术
概述  :  

高架十字迷宫是利用动物对新异环境的探究特性和对高悬敞开臂的恐惧形成矛盾冲突行为来考察动物的焦虑状态。高架十字迷宫具有一对开臂和一对闭臂,啮齿类动物由于嗜暗性会倾向于在闭臂中活动,但出于好奇心和探究性又会在开臂中活动,在面对新奇刺激时,动物同时产生探究的冲动与恐惧,这就造成了探究与回避的冲突行为,从而产生焦虑心理。而抗焦虑药物能明显增加进入开臂的次数与时间,十字迷宫距离地面较高,相当于人站在峭壁上,使实验对象产生恐惧和不安心理。高架十字迷宫被广泛应用于新药开发/筛选/评价、药理学、毒理学、预防

elevated   英 [ˈelɪveɪtɪd]  美 [ˈelɪveɪtɪd] 

释    义   adj. 提高的;高尚的;严肃的;欢欣的

v. 提高;抬起;振奋;提拔(elevate的过去分词)

n. 高架铁路

同根词   elevation n. 高地;海拔;提高;崇高;正面图  

elevator n. 电梯;升降机;升降舵;起卸机

elevate vt. 提升;举起;振奋情绪等;提升…的职位

例    句   We have elevated the economy above everything else and this, I think, is the crisis we face. 我们有高架的经济高于一切,这一点,我认为,这是我们所面对的危机。

 

plus   英 [plʌs]  美 [plʌs; pluː] 

释    义   prep. 加;和;(温度)零上

adj. 余;零上;好的;略高于(A、B等分数);正电的

n. 优势;加号;加法;附加额

conj. (非正式)而且,另外;加

例    句   OR nothing at all plus supplements. 或什么都不加,只加补充食品。

 

maze   英 [meɪz]  美 [meɪz] 

释    义   n. 迷宫;迷惑;糊涂

vt. 迷失;使混乱;使困惑

同根词   mazy adj. 迷宫般的;迷阵似的;错综的

例    句   Life is nothing but a maze. 生命只不过是一个迷宫。

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