慢性应激性抑郁发生中海马糖皮质激素对BDNF的影响

被引：26

作者：

马学萍

安书成

机构：

[1] 陝西师范大学生命科学学院

来源：

陕西师范大学学报(自然科学版) | 2013年 / 41卷 / 06期

关键词：

慢性不可预见性温和应激; 抑郁症; 海马; 糖皮质激素; 脑源性神经营养因子;

D O I：

暂无

中图分类号：

R749.4 [情感性精神病];

学科分类号：

100204 [神经病学];

摘要：

为证明慢性应激性抑郁的发生与应激引起的糖皮质激素(Glucocorticoids,GCs)分泌增加,导致海马脑源性神经营养因子(Brain Derived Neurothrophic Factor,BDNF)表达抑制有关.实验用大鼠通过建立慢性不可预见性温和应激(Chronic Unpredictable Mild Stress,CUMS)抑郁模型,通过海马微量注射皮质酮及糖皮质激素受体拮抗剂米司非酮,然后测量体重,观测行为学表现,并用酶联免疫吸附法检测海马内GCs和BNDF含量.结果显示:CUMS明显诱发大鼠抑郁样行为,海马组织中皮质酮明显升高,BDNF水平明显下降.海马微量注射米司非酮,使CUMS诱发的大鼠抑郁样行为明显改善,且BDNF水平明显升高.正常大鼠海马微量注射皮质酮后,表现出与CUMS组相似的抑郁样行为,且海马组织中BDNF明显下降.以上结果表明,慢性应激引起大鼠海马皮质酮明显升高,使海马BDNF表达明显减少,导致抑郁发生.糖皮质激素Ⅱ型受体(Glucocorticoids Receptor,GR)起着重要作用.

引用

页码：56 / 62

页数：7

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