首都医科大学学报 ›› 2002, Vol. 23 ›› Issue (2): 115-118.

• 临床研究 • 上一篇    下一篇

APP17肽对2型糖尿病KK小鼠海马神经元超微结构和InsR、IRS-1的影响

庄晓明1, 赵志炜2, 姬志娟2, 赵咏梅2, 盛树力2   

  1. 1. 首都医科大学附属北京复兴医院内分泌科;2. 首都医科大学宣武医院, 北京脑老化研究实验室
  • 收稿日期:2002-01-14 修回日期:1900-01-01 出版日期:2002-04-15 发布日期:2002-04-15
  • 通讯作者: 盛树力

Effect of APP17 Peptide on the Hippocampal Neurons Ultrastructure and Expression of InsR, Ins-1 in Type 2 Diabetic KKAy Mice

Zhuang Xiaoming1, Zhao Zhiwei2, Ji Zhijuan2, Zhao Yongmei2, Sheng Shuli 2   

  1. 1. epartment of Endocrinology, Beijing Fuxing Hosptial, Affiliate of Captial University of Medical Sciences;2. Beijing Research Laboratory for Brain Aging, Xuanwu Hospital
  • Received:2002-01-14 Revised:1900-01-01 Online:2002-04-15 Published:2002-04-15

摘要: 为观察APP17肽对糖尿病KKAy小鼠(以下简称KK小鼠)脑海马神经元部分信号转导蛋白表达的影响,并探讨APP17肽对神经元的营养作用,将KK小鼠分为正常对照组(C组)、糖尿病组(DM组)和APP17肽治疗组(DM+APP17P组,给予APP17肽皮下注射).12周后将3组小鼠处死,心脏取血测血糖和血浆胰岛素;灌注固定后,取海马送电镜检查并作免疫组织化学染色。结果显示:①DM组与DM+APP17P组的血糖、胰岛素水平比C组显着升高(P<0.05),但是DM组与DM+APP17P组之间无显着差异;②DM组海马神经元胰岛素受体(InsR)、胰岛素受体底物-1(IRS-1)的表达低于C组和DM+APP17P组(P<0.05);③海马超微结构显示DM组海马神经元线粒体肿胀,未见凋亡的神经元,DM+APP17P组和C组神经元基本正常。提示:APP17肽作为神经营养因子能激活信息转导通路,从而对神经元凋亡有改善作用。

关键词: APP17肽, 2型糖尿病, 信号转导通路

Abstract: The objective of the study was to investigate the expression of apoptotic-related proteins in hippocampal neurons of KK mice and the hippocampus ultrastructure in diabetic KK mice. KK mice were divided into three groups: normal control group, diabetic group and diabetic group treated with APP17-mer peptide. After 12 weeks, crystat sections of mouse brain were prepared and immunohistochemically stained for InsR, IRS-1. Three groups of the mice were observed and analyzed by electron microscopy. The levels of blood glucose and plasma insulin in DM group and DM+APP17P group were significantly increased and compared with C group. There were no significant difference between DM group and DM+ APP17P group. The expression of InsR, IRS-1 significantly decreased in diabetic mice as compared with normal controls(P<0.05), and find mitochondria edema in hippocampus in DM group. APP17 peptide may activate the signal transductive pathway. It may also improve the apoptosis of neuron in type 2 diabetic KK mice.

Key words: APP17 peptide|type 2 diabetes|signal transduction pathway

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