Nat Commun:阿尔兹海默病新发现

2017-03-14 佚名 来宝网

瑞典隆德大学的研究人员使用最新技术生成了先于β- 淀粉样蛋白的有毒团块的形成图像。β- 淀粉样蛋白是阿尔兹海默病的根源所在。科学界长期以来一直认为β- 淀粉样蛋白斑块是瞬间出现,因此,术语“爆米花斑块”由此而来。然而,红外光谱显示的结果却不是这样。隆德大学实验神经病学教授 Gunnar Gouras 说道,“没有人使用这种方法来观察阿尔兹海默病的发展情况。这些图像告诉我们,β- 淀粉样蛋白进展比我

瑞典隆德大学的研究人员使用最新技术生成了先于β- 淀粉样蛋白的有毒团块的形成图像。β- 淀粉样蛋白是阿尔兹海默病的根源所在。



科学界长期以来一直认为β- 淀粉样蛋白斑块是瞬间出现,因此,术语“爆米花斑块”由此而来。然而,红外光谱显示的结果却不是这样。

隆德大学实验神经病学教授 Gunnar Gouras 说道,“没有人使用这种方法来观察阿尔兹海默病的发展情况。这些图像告诉我们,β- 淀粉样蛋白进展比我们想象的要慢,而且我们对阿尔兹海默病的发展过程有了新的认识。”

这个发现预示着什么?科研人员利用生化鉴定能够看到更接近阿尔兹海默病早期的大脑变化情况。结果揭示了另一个发现,那就是β- 淀粉样蛋白不为单个肽,它由四个肽单位连在一起,呈现四聚体形式。

这一发现为该病的治疗提供了一个新的假设——这四种肽的异常分离可以是β- 淀粉样蛋白聚集的开始,随后形成斑块。

另一种淀粉样蛋白疾病与转甲状腺素蛋白淀粉样变性有关,而四聚体的分解已经被确定为该疾病发展的关键。对于这种疾病,已经有一种药物能够稳定这种四聚体,从而稳定β- 淀粉样蛋白达到治疗的目的。

因此,该发现可以改变我们治疗阿尔兹海默病的方向。目前临床上多数药物旨在消除斑块。

原始出处:
O. Klementieva,K. Willén,I. Martinsson,et al.Pre-plaque conformational changes in Alzheimer’s disease-linked Aβ and APP,Nature Communications 8, Article number: 14726 (2017) doi:10.1038/ncomms14726

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    2017-09-12 liuli5079
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    2017-08-14 liye789132251
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    2017-03-19 一念執鐯

    学习了

    0

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    2017-03-14 shaosai

    好好学习,涨知识

    0

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    2017-03-14 1ddf0692m34(暂无匿称)

    创新造福人类

    0

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