Abstract

目的 探讨应激导致大鼠行为和血清皮质酮浓度的改变以及噻奈普汀的抗抑郁机理.方法 将24只大鼠随机分为对照组、4周应激组、4周应激给水组和4周应激给药组,各应激组大鼠连续给予强迫游泳试验4周,每天持续15min.游泳后给予灌胃,4周应激给药组按50mg/kg给予噻奈普汀生理盐水溶液灌胃,4周应激给水组按相同比例给予生理盐水灌胃,采用Open-Field法评定行为,使用酶联免疫吸附测定法(ELISA)测定血清皮质酮水平.结果 应激后对照组爬格数明显高于4周应激组和4周应激给水组(47.50±29.66)次,(12.67±11.38)次,P<0.05;(47.50±29.66)次,(7.67±3.01)次,P<0.05),而与4周应激给药组比较差异无显著性(P>0.05);对照组大鼠修饰次数明显高于4周应激组和4周应激给水组[(7.00±1.79)次,(2.50±2.35)次,P<0.05;(7.00±1.79)次,(3.17±3.19)次,P<0.05],而与4周应激给药组相比差异无显著性(P>0.05).对照组血清皮质酮明显低于其他3组(P<0.01).结论 应激可以导致大鼠焦虑样行为增加和皮质酮激素水平升高,噻奈普汀可以有效减少应激所致焦虑样行为。

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