Abstract
目的 研究慢性不可预见性应激和孤养结合对大鼠外显行为及海马各亚区结构和BDNF表达的影响.方法应激组经过21d慢性应激后,观察所有大鼠行为学改变,用ABC法检测海马各亚区的BDNF表达.结果慢性应激后,应激组大鼠出现同抑郁症患者相似的行为改变;正常组大鼠BDNF在DG区(光密度为40.53±2.62,阳性面积比为2.013±0.074)和CA3区(光密度为39.09±3.19,阳性面积比为1.910±0.056)表达明显;海马各亚区BDNF同对照组相比明显下降(P<0.01).结论慢性不可预见性应激同孤养结合可建立较稳定的抑郁症模型;慢性应激可以使海马亚区BDNF表达下降;DG区和BDNF在海马可塑性上起到重要作用。
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