Mol Psy:新技术可检测阿兹海默症患者脑部的tau蛋白的沉积与扩散特征

2017-05-17 生物谷 生物谷

在最近发表在《Molecular Psychiatry》杂志上的一项研究中,科学家们检测了阿兹海默症患者在发病过程的不同阶段大脑中tau蛋白沉积样的扩散特征。这一结果表明沉积斑块的的大小以及其扩散的速度具有明显的个体差异性,而大脑中tau蛋白的水平与记忆损伤的严重程度之间也有明显的相关性。 在阿兹海默症发病的早期,大脑中已经有了tau

在最近发表在《Molecular Psychiatry》杂志上的一项研究中,科学家们检测了阿兹海默症患者在发病过程的不同阶段大脑中tau蛋白沉积样的扩散特征。这一结果表明沉积斑块的的大小以及其扩散的速度具有明显的个体差异性,而大脑中tau蛋白的水平与记忆损伤的严重程度之间也有明显的相关性。

在阿兹海默症发病的早期,大脑中已经有了tau蛋白的沉积,该蛋白能够对大脑的记忆产生负面的影响。因此,对于疫苗研究者来说它是一个十分有价值的靶点。在最近的这一研究中,来自Karolinska研究所神经学系的Agneta Nordberg教授与她的博士生等人利用PET大脑呈现的手段检测了tau蛋白沉积的情况以及淀粉样斑块在大脑中的存在特征。此外,他们还对大脑细胞的能量代谢情况进行了检测。综上, 作者对这三种指标在疾病发生的不同阶段的变化情况进行了分析。


(图片摘自www.pixabay.com)

“长久以来,研究者们都不遗余力地研究tau扩散的特征,而我们则处于领先的地位”,Nordberg教授说道:“针对疾病发生过程的前17个月内tau蛋白的扩散特征,此前并没有相关的研究。我们的结果能够帮助提高人们对tau蛋白聚集的理解,以及能够帮助进一步提高tau疫苗的设计以及早期诊断的效率等等”。

该研究囊括了16名来自不同临床机构的阿兹海默症患者,在17个月内,这些患者被要求参加了一系列的神经记忆测试以及大脑的PET扫描。虽然所有的参与者大脑内部都存在大量的淀粉样斑块的沉积,但其大小与扩散速率则具有明显的个体差异。

“我们同时发现了板块的大小与记忆损伤之间的关系,这一现象能够解释为什么不同的患者记忆力的损伤严重程度各有不同。”


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    2017-06-04 海棠胜雪

    学习了

    0

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    2017-06-01 海棠胜雪

    学习了

    0

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    2017-05-27 收获你的美

    学习了,谢谢分享

    0

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    2017-05-19 szhvet
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    2017-05-18 虈亣靌

    学习了,需要重视

    0

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