Nat Med:Tau的分子多样性使得阿尔茨海默病具有临床异质性 

2020-06-28 MedSci原创 MedSci原创

研究人员推测,如果传播tau蛋白的属性在不同的个体中存在差异,tau传播的动力学可能会有所不同。

阿尔茨海默病(AD)会导致进行性的认知障碍,但其过程是异质性的,认知能力下降的比率范围广泛。

已有的研究显示,整个大脑皮层的tau聚集物(神经纤维缠结)的蔓延与症状严重程度平行。因此,研究人员推测,如果传播tau蛋白的属性在不同的个体中存在差异,tau传播的动力学可能会有所不同。

对此,研究人员进行了生化,生物物理,MS,和细胞以及动物为基础的生物活性测定,以表征32名AD患者的tau蛋白。

研究人员发现,可溶性、寡聚体、具有种子能力的tau的高磷酸化种类具有显著的患者间异质性。Tau种子活性与临床疾病的侵袭性相关,一些翻译后修饰(PTM)位点似乎与种子活性增强和更差的临床结果都相关,而有些位点则不相关。

这些数据表明,不同的 "典型 "AD个体可能具有独特的tau生化特征。这些数据与个体患有AD的可能性相一致,就像癌症患者一样,一个原本常见的表型可能有多种分子驱动因素,并强调了个性化治疗方法减缓AD临床进展的优势。

 

原始出处:

Simon Dujardin et al.  Tau molecular diversity contributes to clinical heterogeneity in Alzheimer’s disease, Nature Medicine (2020). 

 

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    2021-01-18 liye789132251
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    2020-06-30 szhvet
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有证据表明,阿尔茨海默病(AD)的三大风险因素之间存在相互作用:年龄、APOE基因型和性别。

NATURE:阿尔兹海默危险基因APOE4破坏血脑屏障

血管对痴呆症和阿尔茨海默氏症的贡献越来越多地被认可。最近的研究表明,血脑屏障(BBB)的损坏是人类认知功能障碍的早期生物标志物,包括阿尔茨海默氏症的早期临床阶段。

盘点:假期充电,阿尔兹海默症近期重要研究进展汇总

【1】阿尔兹海默危险基因APOE4破坏血脑屏障

Lancet:唐氏综合征患者阿尔茨海默生物标志物特征研究

阿尔茨海默病在唐氏综合征患者中存在很长的临床前阶段,期间,生物标志物遵循一个可预测的变化顺序,长达20年