Neurosci Bull:叶酸/维生素B缓解大鼠视网膜中高同型半胱氨酸血症引起的阿尔茨海默病相关病理特征

2018-10-21 MedSci MedSci原创

华中科技大学同济医学院的Guo J等人近日在Neurosci Bull杂志上发表了一项重要的工作。高同型半胱氨酸血症(Hhcy)是阿尔茨海默病(AD)的一个重要危险因素。通常具有视觉功能障碍,并且与AD患者的认知缺陷呈正相关性。作者之前的研究表明,Hhcy在海马中诱导AD样tau和淀粉样蛋白-β(Aβ)产生,造成记忆缺陷。补充叶酸和维生素B12(FB)可以预防海马中Hhcy诱导产生AD样病变。在这

华中科技大学同济医学院的Guo J等人近日在Neurosci Bull杂志上发表了一项重要的工作。高同型半胱氨酸血症(Hhcy)是阿尔茨海默病(AD)的一个重要危险因素。通常具有视觉功能障碍,并且与AD患者的认知缺陷呈正相关性。作者之前的研究表明,Hhcy在海马中诱导AD样tau和淀粉样蛋白-β(Aβ)产生,造成记忆缺陷。补充叶酸和维生素B12(FB)可以预防海马中Hhcy诱导产生AD样病变。在这篇文章中,他们研究了Hhcy是否也可以在视网膜中诱导产生AD样病变,以及FB是否具有类似的作用。

他们通过尾静脉注射14天的同型半胱氨酸来来构建Hhcy大鼠模型,同时通过饮用水中补充FB来研究FB的效果。他们发现,Hhcy在视网膜中也诱导产生Aβ和tau,造成血管损伤,而同时补充FB显着的减弱了Hhcy诱导产生的多个AD相关部位tau蛋白过度磷酸化和视网膜中的Aβ积聚。研究其机制发现,这个过程涉及淀粉样蛋白前体蛋白(APP)、早老素-1、β-位点APP-裂解酶1和蛋白磷酸酶-2A的表达下调。

因此,他们的数据表明,视网膜可以作为研究FB对高同型半胱氨酸血症诱导的阿尔茨海默病样病变影响的窗口。

原文出处:

Guo, J., et al., Folate/Vitamin B Alleviates Hyperhomocysteinemia-Induced Alzheimer-Like Pathologies in Rat Retina. Neurosci Bull, 2018.

本文系梅斯医学(MedSci)原创编译整理,转载需授权!

 

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    2018-10-23 zutt
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    2018-10-23 lsndxfj
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    2018-10-23 马龙

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