中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (在线): 1-6.doi: 10.3969/j.issn.2095-4344.1182

• 组织构建实验造模 experimental modeling in tissue construction •    下一篇

丁苯酞干预APP/PS1转基因小鼠(阿尔兹海默病模型)的认知功能

张  琳1,刘金洁1,赵  艳2,刘  毅1,蔺建文1   

  1. 1大连医科大学附属大连市中心医院神经内科,辽宁省大连市  116000;2锦州医科大学生命科学研究所,辽宁省锦州市  121001
  • 收稿日期:2018-12-27 出版日期:2019-03-28 发布日期:2019-03-28
  • 通讯作者: 张琳,博士,主任医师,大连医科大学附属大连市中心医院神经内科,辽宁省大连市 116000
  • 作者简介:张琳,1976年生,山东省荣成市人,汉族,2013年中国医科大学毕业,博士,主任医师,主要从事神经内科临床与科研及教学工作。
  • 基金资助:

    大连市医学科学研究计划项目(171102),项目负责人:张琳

N-butylphthalide affects cognitive function of APP/PS1 transgenic mice (Alzheimer’s disease model) 

Zhang Lin1, Liu Jinjie1, Zhao Yan2, Liu Yi1, Lin Jianwen1   

  1.  (1Department of Neurology, Dalian Central Hospital of Dalian Medical University, Dalian 116000, Liaoning Province, China; 2Life Science Institute of Jinzhou Medical University, Jinzhou 121001, Liaoning Province, China)
  • Received:2018-12-27 Online:2019-03-28 Published:2019-03-28
  • Contact: Zhang Lin, Department of Neurology, Dalian Central Hospital of Dalian Medical University, Dalian 116000, Liaoning Province, China
  • About author:Zhang Lin, MD, Chief physician, Department of Neurology, Dalian Central Hospital of Dalian Medical University, Dalian 116000, Liaoning Province, China
  • Supported by:

    the Medical Science Research Program of Dalian, No. 171102 (to ZL)

摘要:

文章快速阅读:

文题释义:
β-淀粉样蛋白(amyloid-β,Aβ):是由淀粉样前体蛋白( amyloid precursor protein,APP) 经β-和γ-分泌酶的蛋白水解作用而产生的含有39-43个氨基酸的多肽。它可由多种细胞产生,循环于血液、脑脊液和脑间质液中,大多与伴侣蛋白分子结合,少数以游离状态存在。人体内 Aβ最常见的亚型是Aβ1-40和Aβ1-42。在人脑脊液和血中,Aβ1-40分别比 Aβ1-42的含量水平高10倍和1.5倍,Aβ1-42具有更强的毒性,且更容易聚集,从而形成Aβ沉淀的核心,引发神经毒性作用 。
环磷酸腺苷反应单元结合蛋白(cAMP response element binding protein,CREB):是真核生物细胞核内一种重要的核蛋白,属于结构相关转录因子CREB家族成员之一,它的功能是调节基因转录,因此被称为调节转录的核因子。CREB在一些神经心理活动中如神经元的发育、再生、突触形成、学习记忆及细胞的修复等起着关键性的作用,是细胞内多种信号通路的一种关键成分。
摘要
背景:
β淀粉样蛋白被认为是阿尔茨海默病发病的关键因素,抗脑缺血药物丁苯酞(NBP)是治疗血管性痴呆的一种关键药物。
目的:分析丁苯酞治疗APP/PS1转基因小鼠是否参与STEP-ERK-CREB信号通路的机制。
方法:SPF级雄性APP/PS1转基因小鼠(阿尔茨海默病模型小鼠)30只,12月龄,购自北京华阜康生物科技股份有限公司;SPF级C57BL/6野生型小鼠10只,购自北京维通利华实验动物技术有限公司。动物分4组,每组10只:C57BL/6野生型小鼠组;APP/PS1组;丁苯酞10 mg/kg组和30 mg/kg组(分别每日灌胃丁苯酞10 mg/kg和丁苯酞30 mg/kg);野生型小鼠组和APP/PS1组小鼠每日灌胃等量植物油。连续灌胃17 d,第9-16天进行行为学实验,在水迷宫训练前40 min给予丁苯酞;第17天处死小鼠,Western-blot检测小鼠皮质STEP61、pERK1/2、pCREB的蛋白表达。
结果与结论:①连续给予10和30 mg/kg丁苯酞药物治疗16 d:可明显改善APP/PS1转基因小鼠Morris水迷宫任务中的空间学习缺陷,减轻其工作记忆障碍;②Western-blot检测显示:丁苯酞部分降低了活化的STEP61蛋白水平,抑制ERK和CREB的磷酸化;③结果说明:丁苯酞对APP/PS1转基因小鼠具有抗β淀粉样蛋白诱导的神经变性和认知功能减退的保护作用,其可能具有治疗阿尔茨海默病的潜力。

关键词: 丁苯酞, 阿尔茨海默病, β淀粉样蛋白, 水迷宫, 行为学实验, 神经变性, 认知障碍

Abstract:

BACKGROUND: Amyloid-β protein is a key factor of pathogenesis of Alzheimer’s disease. N-butylphthalide, an anti-cerebral ischemia drug, has been shown to have therapeutic effects in vascular dementia.
OBJECTIVE: To investigate whether N-butylphthalide treating APP/PS1 transgenic mice via the SPEP-ERK-CREB signaling pathway.
METHODS: Thirty male APP/PS1 transgenic mice (mouse model of Alzheimer’s disease), SPF grade, aged 12 months were provided by Beijing Huafukang Biotechnology Co., Ltd., and 10 C57BL/6 wild-type mice, SPF grade, were provided by Beijing Weitong Lihua Experimental Animal Technology Co., Ltd. The animals were divided into four groups (n=10/group): C57BL/6 wild-type mice group, APP/PS1 group, and 10 and 30 mg/kg N-butylphthalide groups. The former two groups were given same volume of vegetable oil via gavage, for 17 consecutive days. The behavioral test was performed at 9-16 days. N-butylphthalide was given 40 minutes prior to Morris water maze task. The mice were killed at 17 days, and the proteins levels of STEP61, pERK1/2 and pCREB in brain cortex were detected by western blot assay.
RESULTS AND CONCLUSION: (1) Consecutive 16-day 10 and 30 mg/kg N-butylphthalide could significantly improve spatial learning disability and working memory disorder of APP/PS1 transgenic mice in Morris water maze test. (2) N-butylphthalide partly reduced the level of activated STEP61, and inhibited the dephosphorylation of ERK and CREB. (3) These results suggest that N-butylphthalide protects against amyloid-β-induced neurodegeneration and cognitive decline in APP/PS1 transgenic mice, which may be potential for Alzheimer’s disease.

Key words: Alzheimer Disease, Amyloid, Cognition

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