Nature:研究揭示重复性脑创伤典型特征

2019-03-26 唐一尘 中国科学报

近日,英国研究人员描述了一种由重复性头部创伤(如运动伤害)引起的神经退行性疾病中的蛋白质组装。慢性创伤性脑部病变(CTE)的特征是tau 蛋白累积聚合,类似阿尔茨海默病一样。这项新研究表明,虽然影响这两种疾病的是同一种tau 蛋白,但CTE 中的tau 组装与阿尔茨海默病中的略有不同。以上发现证明,tau 组装的细微差异定义了不同的神经退行性疾病。

近日,英国研究人员描述了一种由重复性头部创伤(如运动伤害)引起的神经退行性疾病中的蛋白质组装。慢性创伤性脑部病变(CTE)的特征是tau 蛋白累积聚合,类似阿尔茨海默病一样。这项新研究表明,虽然影响这两种疾病的是同一种tau 蛋白,但CTE 中的tau 组装与阿尔茨海默病中的略有不同。以上发现证明,tau 组装的细微差异定义了不同的神经退行性疾病。

CTE 会影响从事接触性运动(如拳击和美式橄榄球)的运动员、退伍军人和遭受过身体虐待的人群。CTE 的症状包括行为、情绪和思维出现异常,一般在受伤后很长一段时间才会显现,而且会随着时间推移不断加重,甚至导致失智。虽然之前已经鉴定发现tau 蛋白组装对于CTE 进展有一定影响,但目前仍然缺乏对其结构的详细了解。

剑桥医学研究理事会分子生物学实验室的Sjors Scheres、Michel Goedert 及同事研究了3 名CTE 患者:一名美式橄榄球球员和两名拳击手,确定了3 人大脑中的tau 蛋白结构。他们发现3 人的tau 蛋白组装结构完全相同,但和其他涉及tau 蛋白组装的神经退行性疾病(如阿尔茨海默病)的患者不一样。相关论文近日在线发表于《自然》。

研究人员认为最新描述的tau 蛋白组装结构或有助于设计针对CTE 的诊断测试。该发现或许可以促进人们理解脑创伤是如何导致tau 蛋白形成的,进而帮助开发能够阻止CTE 中tau 蛋白积聚的疗法。

原始出处:

Benjamin Falcon, Jasenko Zivanov, Wenjuan Zhang, et.al. Novel tau filament fold in chronic traumatic encephalopathy encloses hydrophobic molecules. Nature 20 March 2019

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    2019-10-23 liye789132251
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    2019-12-29 珙桐
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    2019-03-27 坚强007

    向挑战病魔的科研人员致敬!!!

    0

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    2019-03-27 zhangzhaoqi

    颅脑外伤与tau蛋白之间联系有研究吗?

    0

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