中国神经再生研究(英文版) ›› 2015, Vol. 10 ›› Issue (9): 1427-1432.doi: 10.4103/1673-5374.165510

• 原著:脑损伤修复保护与再生 • 上一篇    下一篇

脑源性生长因子过表达:对脑卒中后抑郁的神经保护

  

  • 收稿日期:2015-06-07 出版日期:2015-09-28 发布日期:2015-09-28
  • 基金资助:

    浙江省实验动物科技项目(2012C37083)

Overexpression of brain-derived neurotrophic factor in the hippocampus protects against post-stroke depression

Hao-hao Chen1, Ning Zhang1, Wei-yun Li2, Ma-rong Fang2, Hui Zhang3, Yuan-shu Fang3, Ming-xing Ding1, Xiao-yan Fu1   

  1. 1 Medical Molecular Biology Laboratory, School of Medicine, Jinhua Polytechnic, Jinhua, Zhejiang Province, China
    2 Institute of Neuroscience, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China
    3 Center of Experimental Animals, Jinhua Food and Drug Administration, Jinhua, Zhejiang Province, China
  • Received:2015-06-07 Online:2015-09-28 Published:2015-09-28
  • Contact: Xiao-yan Fu, M.D., fxythd@qq.com.
  • Supported by:

    This study was supported by a grant from the Experimental Animal Science and Technology Project of Zhejiang Province in China, No. 2012C37083

摘要:

研究发现卒中后抑郁与脑源性神经营养因子表达降低有一定相关性。实验假设脑源性神经营养因子过表达对卒中后抑郁大鼠的抑郁样行为有影响,首先通过大脑中动脉栓塞法构建局灶性脑缺血大鼠模型,然后进行孤独饲养合并慢性温和刺激构建卒中后抑郁大鼠模型,而后利用脑立体定位注射脑源性神经营养因子过表达慢病毒载体进入海马区。注射后7 d,免疫印迹、实时荧光定量PCR、蔗糖溶液消耗量以及旷场实验结果显示,抑郁大鼠脑源性神经营养因子的表达,蔗糖溶液消耗量和水平垂直运动得分均增加。结果表明,脑源性神经营养因子在卒中后抑郁大鼠海马过表达,可改善其抑郁样行为。

关键词: 神经再生, 脑损伤, 脑源性神经营养因子, 慢病毒, 脑卒中后抑郁, 抑郁样行为, 海马, 脑缺血, 蔗糖溶液消耗量, 旷场试验, 慢性不可预见性应激, 免疫印迹

Abstract:

Post-stroke depression is associated with reduced expression of brain-derived neurotrophic factor (BDNF). In this study, we evaluated whether BDNF overexpression affects depression-like behavior in a rat model of post-stroke depression. The middle cerebral artery was occluded to produce a model of focal cerebral ischemia. These rats were then subjected to isolation-housing combined with chronic unpredictable mild stress to generate a model of post-stroke depression. A BDNF gene lentiviral vector was injected into the hippocampus. At 7 days after injection, western blot assay and real-time quantitative PCR revealed that BDNF expression in the hippocampus was increased in depressive rats injected with BDNF lentivirus compared with depressive rats injected with control vector. Furthermore, sucrose solution consumption was higher, and horizontal and vertical movement scores were increased in the open field test in these rats as well. These findings suggest that BDNF overexpression in the hippocampus of post-stroke depressive rats alleviates depression-like behaviors.

Key words: nerve regeneration, brain injury, brain-derived neurotrophic factor, lentivirus, post-stroke depression, depression-like behavior, hippocampus, cerebral ischemia, sucrose solution consumption, open field test, chronic unpredictable mild stress, western blot assay, neural regeneration