首页> 外文期刊>Pharmacology, Biochemistry and Behavior >Involvement of the kappa-opioid receptor in the anxiogenic-like effect of CP 55,940 in male rats.
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Involvement of the kappa-opioid receptor in the anxiogenic-like effect of CP 55,940 in male rats.

机译:κ阿片受体参与CP 55,940在雄性大鼠中的血管生成样作用。

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We have studied the possible interaction between three selective opioid-receptor antagonists, nor-binaltorphimine (NB: kappa) (5 mg/kg), cyprodime (CY: mu) (10 mg/kg) and naltrindole (NTI: delta) (1 mg/kg), and the cannabinoid receptor agonist CP 55,940, in the modulation of anxiety (plus-maze) and adrenocortical activity (serum corticosterone levels by radioimmunoassay) in male rats. The holeboard was used to evaluate motor activity and directed exploration. CP 55,940 (75 microg/kg, but not 10 microg/kg) induced an anxiogenic-like effect, which was antagonised by NB. The other effects of CP 55,940 (75 microg/kg), a decreased holeboard activity and stimulation of adrenocortical activity, were not antagonised by any of the three opioid receptor antagonists. CY and NTI, when administered alone, induced marked reductions in motor activity, anxiogenic-like effects and stimulation of adrenocortical activity. The selective kappa-opioid receptor antagonist NB, on its own, did not modify the level of anxiety but stimulated adrenocortical activity. We provide the first pharmacological evidence about the involvement of the kappa-opioid receptor in the anxiogenic-like effect of CP 55,940.
机译:我们已经研究了三种选择性阿片受体拮抗剂,去甲双萘酚(NB:κ)(5 mg / kg),丙啶(CY:mu)(10 mg / kg)和纳曲酮(NTI:δ)之间的可能相互作用(1毫克/千克)和大麻素受体激动剂CP 55,940,以调节雄性大鼠的焦虑(加迷宫)和肾上腺皮质激素活性(通过放射免疫法测定血清皮质酮水平)。孔板用于评估运动活动和定向探索。 CP 55940(75微克/千克,而不是10微克/千克)诱导了类似焦虑的作用,但被NB拮抗。三种阿片受体拮抗剂均未拮抗CP 55,940(75微克/千克)的其他作用,降低的孔板活性和刺激肾上腺皮质活性。 CY和NTI单独使用时,会导致运动活动,类似血管生成的作用和刺激肾上腺皮质活动的活动明显减少。选择性κ阿片受体拮抗剂NB本身并未改变焦虑水平,但刺激了肾上腺皮质活动。我们提供了有关卡伯阿片受体参与CP 55,940的类似血管生成作用的第一个药理学证据。

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