金丝桃苷对慢性不可预知温和刺激大鼠抑郁行为的影响

被引:30
作者
张彦
祝晨蔯
机构
[1] 广州中医药大学临床药理研究所
关键词
金丝桃苷; 抑郁; 氧化性应激; 抗氧化剂; 下丘脑-垂体系统;
D O I
10.14109/j.cnki.xyylc.2017.03.007
中图分类号
R285.5 [中药实验药理];
学科分类号
100806 [中药药理学];
摘要
目的研究金丝桃苷对慢性温和不可预知应激(CUMS)大鼠抑郁样行为的影响。方法大鼠随机分空白组,模型组,金丝桃苷低(5 mg·kg-1)、中(10 mg·kg-1)、高(15 mg·kg-1)剂量组和氟西汀(10 mg·kg-1)对照组,每组10只。采用慢性温和不可预知应激进行为期6周的造模,在造模第3周后给药,持续给药3周。采用糖水偏爱实验、旷场实验和强迫游泳实验观察金丝桃苷的抗抑郁样作用;通过检测海马活性氧(ROS)、丙二醛(MDA)含量和超氧化物歧化酶(SOD)活性观察金丝桃苷的抗氧化应激作用;通过检测血清促肾上腺皮质激素释放激素(CRH)、促肾上腺皮质激素(ACTH)和皮质酮(CORT)水平以及海马糖皮质激素受体(GR)蛋白表达水平观察金丝桃苷对下丘脑-垂体-肾上腺(HPA)轴的影响。结果与空白组相比,糖水偏爱实验中模型组大鼠糖水偏爱度明显降低、旷场实验中穿越格子数以及直立次数明显减少、强迫游泳试验中不动时间明显增加(均P<0.01),而在给予金丝桃苷中、高剂量以及氟西汀后均能得到不同程度的逆转(P<0.05,或P<0.01);模型组大鼠的海马ROS和MDA含量以及血清CRH、ACTH和CORT水平明显升高、海马SOD活性与GR蛋白表达明显降低(均P<0.01),而在给予金丝桃苷中、高剂量以及氟西汀后均能得到不同程度的逆转(P<0.05,或P<0.01)。结论金丝桃苷能够改善CUMS大鼠的抑郁样作用,其作用与降低海马氧化应激水平及对HPA轴的调节作用相关。
引用
收藏
页码:150 / 156
页数:7
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