Acta Neuropharmacologica››2013,Vol. 3››Issue (2): 13-25.

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Secoisolariciresinol Reduces Behavioral Despair and Regulates Hippocampal BDNF Expression in Ovariectomized Mice

YAO Guang-Yin, JI Dan-Yang, ZHOU Wei-Dong, YAO Hai-Yan, KU Bao-Shan, YANG Dong-Hui

  1. 1 State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China,
    2 College of Life Sciences, Beijing Normal University, Beijing, 100875, China
    3 Beijing Dingguochangsheng Biotechnology Co. Ltd, Beijing, 102209, China
  • Online:2013-04-26Published:2014-06-27
  • Contact:杨东辉,女,副教授,硕士研究生导师;研究方向:天然产物的生物转化及生物合成;Tel.: +86-10-82801559, E-mail: ydhui@bjmu.edu.cn
  • About author:姚广印,男,博士;研究方向:神经药理;E-mail:ygy913@163.com
  • Supported by:

    国家科技重大专项重大新药创制项目(No.2011ZX09102-011-06)

Abstract:Objective: To investigate the antidepressant-like effect and the possible mechanism of Secoisolariciresinol (SECO) in ovariectomized (OVX) mice.Methods: OVX mice were used as a menopausal animal model and tail suspension and forced swimming tests were conducted to measure the effects of SECO on behavioral despair. The expression levels of brain-derived neurotrophic factor (BDNF) mRNA and protein were measured by real-time PCR, Western blot analysis and immunofluorescence. In addition, Akt and pAkt were tested by Western blot analysis and BrdU-labeled cells were observed by immunofluorescence.Results: SECO (10 and 20 mg/kg, p.o. ) significantly reduced the immobility duration of OVX mice in both forced swimming and tail suspension tests. Administration of SECO significantly increased BDNF levels in hippocampus. Moreover, this study demonstrated that SECO increased BDNF immunoreactivity in hippocampal CA1, CA3 and DG pyramidal neurons, and BrdU-labeled cell number in the DG subfield. SECO also significantly increased the phosphorylation of Akt.Conclusion: SECO has the potential to treat depression in menopausal women which may be attributed to BDNF-mediated PI3K/Akt signaling pathway.

Key words:Secoisolariciresinol (SECO),Ovariectomized mice,Forced swimming,Tail suspension,Brain-derived neurotrophic factor (BDNF)

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