Nature Neuroscience:脑低糖的摄取似乎加剧阿尔茨海默病

2015-03-03 崔倩译 MedSci原创

据来自南加州大学医学院的凯克学院(USC)一项新的小鼠研究,在负责整个大脑的保护血脑屏障运输葡萄糖的蛋白缺乏会产生加大阿尔茨海默氏病的神经退行性影响。 该研究表明,靶向GLUT1蛋白可能有助于预防或减缓阿尔茨海默氏症的影响,尤其是那些处于危险的疾病。这项名为“GLUT1减少加剧阿尔茨海默氏症血管—神经功能障碍和变性”的研究发表在《自然神经科学》杂志上。 该研究的主要研究者、凯克医学院Zilkh

据来自南加州大学医学院的凯克学院(USC)一项新的小鼠研究,在负责整个大脑的保护血脑屏障运输葡萄糖的蛋白缺乏会产生加大阿尔茨海默氏病的神经退行性影响。

该研究表明,靶向GLUT1蛋白可能有助于预防或减缓阿尔茨海默氏症的影响,尤其是那些处于危险的疾病。这项名为“GLUT1减少加剧阿尔茨海默氏症血管—神经功能障碍和变性”的研究发表在《自然神经科学》杂志上。

该研究的主要研究者、凯克医学院Zilkha神经源性研究所(ZNI)所长、玛丽海利和塞利姆齐尔卡椅阿尔茨海默氏病研究主任、医学博士Berislav V. Zlokovic说:“我们的研究结果表明,血脑屏障中GLUT1缺乏的不仅是老年痴呆症的症状,但事实上,还导致了一系列恶化疾病的影响血管损伤,我们不知道是否药物可以恢复GLUT1的表达,但我们相信,针对蛋白可能帮助那些易患该病的人群预防老年痴呆症的恶化。”

根据阿尔茨海默氏症协会,在今天的美国大约520万人有老年痴呆症,都是不可逆转的,逐渐使大脑产生记忆,思维和行为疾病。这是最常见的痴呆症类型,一种总称内存和其他心理能力的损失,预计到2050年将有1600万65岁以上的美国人受到影响。

葡萄糖是大脑的主要能量来源,GLUT1帮助移动它穿过血—脑屏障,一种防止血液和病原体进入大脑的蜂窝层。以前的研究已经表明有阳性家族史,或有这种疾病但显示轻微或没有认知损害的,在阿尔茨海默病遗传风险的人都显示脑葡萄糖摄取减少。

在这项新研究中,Zlokovic的研究小组利用转基因小鼠表明GLUT1在保持适当的脑毛细血管网,血流和血 - 脑屏障的完整性是必要的。他们发现,GLUT1缺乏导致葡萄糖摄取的减少在2周龄就出现了,到了六个月的年龄,出现了神经元功能障碍,行为缺陷,淀粉样蛋白β肽水平升高,行为变化和神经变性的变化。研究小组还发现,内皮 - 血管内衬 –血脑屏障启动故障中GLUT1是缺乏的。阿尔茨海默氏病的发病机制被广泛认为是由淀粉样蛋白β肽积聚在大脑中,通过血 - 脑屏障的破坏容易被驱动。

未来研究的区域可包括鉴定代谢途径,通过该在血脑屏障影响脑代谢GLUT1缺陷以及早期胚胎GLUT1损失是否影响中枢神经系统不同发育后期的缺乏进行展开。

原始出处

Ethan A Winkler, Yoichiro Nishida, Abhay P Sagare, Sanket V Rege, Robert D Bell, David Perlmutter, Jesse D Sengillo, Sara Hillman, Pan Kong, Amy R Nelson, John S Sullivan, Zhen Zhao, Herbert J Meiselman, Rosalinda B Wenby, Jamie Soto, E Dale Abel, Jacob Makshanoff, Edward Zuniga, Darryl C De Vivo, Berislav V Zlokovic. GLUT1 reductions exacerbate Alzheimer's disease vasculo-neuronal dysfunction and degeneration. Nature Neuroscience, 2015

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    2015-05-09 liye789132251
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    2015-03-05 lsndxfj
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    2015-03-05 jichang
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