The genetically heterogeneous NIH-HS rat stock has been characterized by its response to anxiety- and fear-inducing situations, thus leading to the conclusion that they are a rather anxious and passive coping type of ...The genetically heterogeneous NIH-HS rat stock has been characterized by its response to anxiety- and fear-inducing situations, thus leading to the conclusion that they are a rather anxious and passive coping type of rats. Taking advantage of these profiles, and knowing that they show very poor performance in the two-way active (shuttle box) escape/avoidance task, we have tested NIH-HS rats (n = 80) in the forced swimming test (FST) as well as we have studied escape response deficits (i.e. response failures) of the same animals in the two-way shuttle box task. They were also tested for anxiety in the elevated zero-maze. The goal of such a study was that of investigating whether there are associations or relationships among helplessness-like or passive coping responses between both models of depression, i.e. the FST and the helplessness-like escape deficits in the shuttle box task. The results for the first time show associations among responses from both depression models and that selecting rats for displaying extreme (active or passive) responses in one of the models predict in a coherent manner (according to the hypothesis) their behaviour in the other model. These findings are discussed in the context of the concurrent validity of both models of depression as well as concerning the possible relevance of NIH-HS rats as a tool for future studies on this field.展开更多
目的建立大鼠获得性无助模型口服给药途径评价药物抗抑郁作用的方法,并观察口服巴戟天寡糖在该模型上的抗抑郁效应.方法采用微机程序控制的大鼠穿梭箱反应仪,给予不可逃避的足底电击建立获得性无助模型,进行条件性回避反应训练,测定大...目的建立大鼠获得性无助模型口服给药途径评价药物抗抑郁作用的方法,并观察口服巴戟天寡糖在该模型上的抗抑郁效应.方法采用微机程序控制的大鼠穿梭箱反应仪,给予不可逃避的足底电击建立获得性无助模型,进行条件性回避反应训练,测定大鼠的逃避失败次数. 结果模型对照组动物的逃避失败次数比正常组动物显著增加(P <0.01),丙咪嗪90 mg/kg在获得性无助后第2天～第4天均显著减少动物逃避失败次数,与模型对照组比较差异显著(P <0.01或P <0.05),表明模型复制成功.在获得性无助后第3天和第4天,巴戟天寡糖100 mg/kg可以显著减少动物逃避失败次数(第3天:6.4±2.6 vs 18.3±3.2;第4天:7.0±3.1 vs 20.1±3.1,P <0.05),巴戟天寡糖50 mg/kg在第4天显著减少逃避失败次数(8.1±2.8 vs 20.1±3.1, P <0.05).结论在大鼠获得性无助模型上,可采用口服给药途径评价药物的抗抑郁作用,并且巴戟天寡糖在此模型上口服给药时具有抗抑郁活性.展开更多
基金Supported by grants for the MICINN(SAF2009-10532),“Fundacio La Marato TV3”(ref.092630/31),2009SGR-0051EURATRANS consortium(grant agreement HEALTH-F4-2010-241504)the Welcome Trust(UK).C.M-C is recipient of a FPI(2010,MICINN)PhD fellowship.
文摘The genetically heterogeneous NIH-HS rat stock has been characterized by its response to anxiety- and fear-inducing situations, thus leading to the conclusion that they are a rather anxious and passive coping type of rats. Taking advantage of these profiles, and knowing that they show very poor performance in the two-way active (shuttle box) escape/avoidance task, we have tested NIH-HS rats (n = 80) in the forced swimming test (FST) as well as we have studied escape response deficits (i.e. response failures) of the same animals in the two-way shuttle box task. They were also tested for anxiety in the elevated zero-maze. The goal of such a study was that of investigating whether there are associations or relationships among helplessness-like or passive coping responses between both models of depression, i.e. the FST and the helplessness-like escape deficits in the shuttle box task. The results for the first time show associations among responses from both depression models and that selecting rats for displaying extreme (active or passive) responses in one of the models predict in a coherent manner (according to the hypothesis) their behaviour in the other model. These findings are discussed in the context of the concurrent validity of both models of depression as well as concerning the possible relevance of NIH-HS rats as a tool for future studies on this field.
文摘目的建立大鼠获得性无助模型口服给药途径评价药物抗抑郁作用的方法,并观察口服巴戟天寡糖在该模型上的抗抑郁效应.方法采用微机程序控制的大鼠穿梭箱反应仪,给予不可逃避的足底电击建立获得性无助模型,进行条件性回避反应训练,测定大鼠的逃避失败次数. 结果模型对照组动物的逃避失败次数比正常组动物显著增加(P <0.01),丙咪嗪90 mg/kg在获得性无助后第2天～第4天均显著减少动物逃避失败次数,与模型对照组比较差异显著(P <0.01或P <0.05),表明模型复制成功.在获得性无助后第3天和第4天,巴戟天寡糖100 mg/kg可以显著减少动物逃避失败次数(第3天:6.4±2.6 vs 18.3±3.2;第4天:7.0±3.1 vs 20.1±3.1,P <0.05),巴戟天寡糖50 mg/kg在第4天显著减少逃避失败次数(8.1±2.8 vs 20.1±3.1, P <0.05).结论在大鼠获得性无助模型上,可采用口服给药途径评价药物的抗抑郁作用,并且巴戟天寡糖在此模型上口服给药时具有抗抑郁活性.
