Neuroscience Bulletin

, Volume 26, Issue 2, pp 140–146 | Cite as

Preventive effect of estrogen on depression-like behavior induced by chronic restraint stress

  • Wei Li (厉 蔚)
  • Qing-Jiao Li (李庆娇)
  • Shu-Cheng An (安书成)
Original Article

Abstract

Objective

To investigate the roles of estrogen and kalirin-7 in chronic restraint stress (CRS)-induced depression and the pathophysiological mechanism of depression.

Methods

Healthy female mice from Institute of Cancer Research (ICR) were randomly divided into 3 groups: control group, CRS group, and estrogen + CRS group. CRS was used to establish the animal model of depression. Forced swimming test and immunohistochemistry method were utilized to investigate the animal behavior and kalirin-7 expression in the hippocampus, respectively.

Results

Compared with the control group, the CRS mice displayed depression-like behaviors, including a significant reduction in body weight, a significant increase in immobility time in forced swimming test, and a dramatic decrease in kalirin-7 expression in the hippocampus. However, administration of estrogen attenuated the CRS-induced negative behaviors, and simultaneously increased kalirin-7 expression.

Conclusion

Estrogen replacement therapy (ERT) could prevent CRS-induced depression-like behaviors in female ICR mice. Besides, kalirin-7 also plays a role in preventing CRS-induced depression-like behaviors.

Keywords

chronic restraint stress depression estrogen neural plasticity kalirin-7 

雌激素在慢性束缚应激性抑郁发生中的作用

摘要

目的

探讨雌激素和kalirin-7 在慢性束缚应激性抑郁发生中的作用。

方法

采用慢性束缚应激性抑郁动物模型, 运用强迫游泳测试和免疫组织化学方法, 分别检测动物行为学表现及海马中kalirin-7 蛋白的表达。

结果

慢性束缚应激能显著降低动物体重、 延长游泳不动时间、 抑制海马中kalirin-7 蛋白的表达。 注射雌激素能明显改善动物抑郁样行为, 并且海马kalirin-7 表达显著增加。

结论

慢性束缚应激能诱发产生抑郁样行为, 而雌激素替代疗法则能预防慢性束缚应激性抑郁的发生。 此外, kalirin-7 在防止慢性束缚应激性抑郁的发生中起到重要作用。

关键词

慢性束缚应激 抑郁 雌激素 神经可塑性 kalirin-7 

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Copyright information

© Shanghai Institutes for Biological Sciences, CAS and Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Wei Li (厉 蔚)
    • 1
  • Qing-Jiao Li (李庆娇)
    • 1
  • Shu-Cheng An (安书成)
    • 1
  1. 1.Institute of Brain and Behavior Science, College of Life ScienceShaanxi Normal UniversityXi’anChina

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