磷酸化tau階段變化與阿爾茨海默症演變有關
作者:
小柯機器人發布時間:2020/3/15 12:57:45
美國華盛頓大學醫學院的Eric McDade和Randall J. Bateman團隊合作發現,可溶的磷酸化tau標記將tau、澱粉樣蛋白以及主導遺傳的阿爾茨海默症階段演變聯繫起來。這一研究成果於2020年3月11日發表在《自然-醫學》上。
研究人員在主導遺傳的阿爾茨海默症進展研究的四十年中,對腦脊液標記中tau蛋白多個位點的磷酸化狀態進行了量化。
他們確定了tau階段模式,其中特定部位的磷酸化變化發生在疾病進展的不同時期,並隨著時間的推移遵循不同的軌跡。
這些tau磷酸化狀態的變化與疾病的結構、代謝、神經退行性疾病和臨床標誌物獨特相關。某些伴隨著澱粉樣β的集聚的tau磷酸化((p-tau217和p-tau181))狀態初始增加要追溯到二十年之前,那時聚集性tau病理學還未發展。其他的(p-tau205和t-tau)隨著萎縮和代謝不足而增加,更接近發作症狀。
這些發現提供了關於tau、澱粉樣β蛋白和神經退行性聯繫的途徑的見解,並可能促進基於tau的治療的臨床試驗。
據介紹,研究基於tau的阿爾茨海默症需要了解與tau相關的疾病變化階段。
附:英文原文
Title: A soluble phosphorylated tau signature links tau, amyloid and the evolution of stages of dominantly inherited Alzheimer’s disease
Author: Nicolas R. Barthlemy, Yan Li, Nelly Joseph-Mathurin, Brian A. Gordon, Jason Hassenstab, Tammie. L. S. Benzinger, Virginia Buckles, Anne M. Fagan, Richard J. Perrin, Alison M. Goate, John C. Morris, Celeste M. Karch, Chengjie Xiong, Ricardo Allegri, Patricio Chrem Mendez, Sarah B. Berman, Takeshi Ikeuchi, Hiroshi Mori, Hiroyuki Shimada, Mikio Shoji, Kazushi Suzuki, James Noble, Martin Farlow, Jasmeer Chhatwal, Neill R. Graff-Radford, Stephen Salloway, Peter R. Schofield, Colin L. Masters, Ralph N. Martins, Antoinette OConnor, Nick C. Fox, Johannes Levin, Mathias Jucker, Audrey Gabelle, Sylvain Lehmann, Chihiro Sato, Randall J. Bateman, Eric McDade
Issue&Volume: 2020-03-11
Abstract: Development of tau-based therapies for Alzheimer’s disease requires an understanding of the timing of disease-related changes in tau. We quantified the phosphorylation state at multiple sites of the tau protein in cerebrospinal fluid markers across four decades of disease progression in dominantly inherited Alzheimer’s disease. We identified a pattern of tau staging where site-specific phosphorylation changes occur at different periods of disease progression and follow distinct trajectories over time. These tau phosphorylation state changes are uniquely associated with structural, metabolic, neurodegenerative and clinical markers of disease, and some (p-tau217 and p-tau181) begin with the initial increases in aggregate amyloid-β as early as two decades before the development of aggregated tau pathology. Others (p-tau205 and t-tau) increase with atrophy and hypometabolism closer to symptom onset. These findings provide insights into the pathways linking tau, amyloid-β and neurodegeneration, and may facilitate clinical trials of tau-based treatments.
DOI: 10.1038/s41591-020-0781-z
Source: https://www.nature.com/articles/s41591-020-0781-z