Tau分子多樣性是造成阿爾茨海默氏病臨床異質性的原因
作者:
小柯機器人發布時間:2020/6/23 15:27:43
2020年6月22日出版的《自然-醫學》雜誌刊登了美國麻薩諸塞州綜合醫院Bradley T. Hyman小組的最新成果,他們研究發現Tau分子多樣性是造成阿爾茨海默氏病(AD)臨床異質性的原因。
研究人員假設如果傳播的tau蛋白特性在個體之間變化,則tau擴散的動力學也可能會發生變化。研究人員利用生化、生物物理、質譜以及基於細胞和動物的生物活性測定,確定了32例AD患者的tau蛋白特性。
研究發現在可溶性、低聚、種系tau高磷酸化物種中,患者與患者之間存在異質性。Tau定殖活動與該疾病的臨床侵襲性相關,某些翻譯後修飾(PTM)位點似乎與定殖活動增強和臨床效果差有關,而其他則不相關。
這些數據表明,具有「典型」 AD的不同個體可能具有不同的tau生化特徵。這些數據與以下可能性相關,即與患有癌症的人類似,患有典型表型的AD個體可能具有多種分子驅動因素,這強調了個性化治療可能減慢AD臨床進展的可能。
據介紹,AD引起無法緩和的、進行性認知障礙,但其過程是異質的,認知下降的速度範圍廣。tau聚集體(神經原纖維纏結)在大腦皮層中的擴散與症狀嚴重程度相關。
附:英文原文
Title: Tau molecular diversity contributes to clinical heterogeneity in Alzheimer’s disease
Author: Simon Dujardin, Caitlin Commins, Aurelien Lathuiliere, Pieter Beerepoot, Analiese R. Fernandes, Tarun V. Kamath, Mark B. De Los Santos, Naomi Klickstein, Diana L. Corjuc, Bianca T. Corjuc, Patrick M. Dooley, Arthur Viode, Derek H. Oakley, Benjamin D. Moore, Kristina Mullin, Dinorah Jean-Gilles, Ryan Clark, Kevin Atchison, Renee Moore, Lori B. Chibnik, Rudolph E. Tanzi, Matthew P. Frosch, Alberto Serrano-Pozo, Fiona Elwood, Judith A. Steen, Matthew E. Kennedy, Bradley T. Hyman
Issue&Volume: 2020-06-22
Abstract: Alzheimer’s disease (AD) causes unrelenting, progressive cognitive impairments, but its course is heterogeneous, with a broad range of rates of cognitive decline1. The spread of tau aggregates (neurofibrillary tangles) across the cerebral cortex parallels symptom severity2,3. We hypothesized that the kinetics of tau spread may vary if the properties of the propagating tau proteins vary across individuals. We carried out biochemical, biophysical, MS and both cell- and animal-based-bioactivity assays to characterize tau in 32 patients with AD. We found striking patient-to-patient heterogeneity in the hyperphosphorylated species of soluble, oligomeric, seed-competent tau. Tau seeding activity correlates with the aggressiveness of the clinical disease, and some post-translational modification (PTM) sites appear to be associated with both enhanced seeding activity and worse clinical outcomes, whereas others are not. These data suggest that different individuals with 『typical』 AD may have distinct biochemical features of tau. These data are consistent with the possibility that individuals with AD, much like people with cancer, may have multiple molecular drivers of an otherwise common phenotype, and emphasize the potential for personalized therapeutic approaches for slowing clinical progression of AD.
DOI: 10.1038/s41591-020-0938-9
Source: https://www.nature.com/articles/s41591-020-0938-9