关键词:阿尔茨海默病;β淀粉样蛋白;细胞因子;S100β;发病机制
摘 要: 目的 研究大鼠脑内Aβ40的沉积与细胞因子S100β表达的关系。方法 我们将Aβ40定向注射于大鼠的双侧海马,采用免疫组化方法观察了S100β的表达。结果 S100β免疫组化显示,Aβ40处理的大鼠海马区域有细胞因子S100β的表达,而在生理盐水对照组的大鼠海马区未出现S100β的阳性表达。结论 结果提示Aβ40可诱导大鼠海马S100β表达。在超过生理性效应的阈值水平之上慢性持续性表达时,S100β可能是一种重要的致病因子,具有神经毒性效应,参与Alzheimer病的病理活动。Aβ40可能是一种重要的病理性刺激因素。
中图分类号:R742 文献标识码:A 文章编号:1003-2754(2000)04-0206-03
Amyloid- β protein 40 and the expression ofS100 β in the SD ratbrains
ZUHeng-bing CHENSheng-di SHAO Jun,etal.
( Department ofNeurology,Shanghai Medical University Affilated Jinshan Hospital,Shanghai,200540 China )
Abstracts: Objective To inquire whether A β 40 can induce the expression ofS100 β in the ratbrain. Method Toresearch the S100 β expressionafter amyloid- β 40injection,we take use of anti-S100 β immunohistochemical staining. Result 3-day and 7-day after A β 40 injection,we conformed extensive S100 β immunostaining by immunostainingof formalin-fixed brain sections. In constrast,the hippocampal cells showed no evidence ofS100 β expression inthe control. Conclusion It indicates that A β 40 can induce expression of S100 β . S100 β may be an important pathologenic factor when chronicallyexpressed above some threshold,favors the pathologic changes of Alzheimer ......
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