ジャーナル: Sci Transl Med / 年: 2021 タイトル: The deletion causes early onset autosomal dominant Alzheimer's disease by altering APP processing and increasing amyloid β fibril formation. 著者: María Pagnon de la Vega / Vilmantas Giedraitis / Wojciech Michno / Lena Kilander / Gökhan Güner / Mara Zielinski / Malin Löwenmark / RoseMarie Brundin / Torsten Danfors / Linda Söderberg ...著者: María Pagnon de la Vega / Vilmantas Giedraitis / Wojciech Michno / Lena Kilander / Gökhan Güner / Mara Zielinski / Malin Löwenmark / RoseMarie Brundin / Torsten Danfors / Linda Söderberg / Irina Alafuzoff / Lars N G Nilsson / Anna Erlandsson / Dieter Willbold / Stephan A Müller / Gunnar F Schröder / Jörg Hanrieder / Stefan F Lichtenthaler / Lars Lannfelt / Dag Sehlin / Martin Ingelsson / 要旨: Point mutations in the amyloid precursor protein gene () cause familial Alzheimer's disease (AD) by increasing generation or altering conformation of amyloid β (Aβ). Here, we describe the mutation ...Point mutations in the amyloid precursor protein gene () cause familial Alzheimer's disease (AD) by increasing generation or altering conformation of amyloid β (Aβ). Here, we describe the mutation (Δ690-695), the first reported deletion causing autosomal dominant AD. Affected individuals have an age at symptom onset in their early forties and suffer from a rapidly progressing disease course. Symptoms and biomarkers are typical of AD, with the exception of normal cerebrospinal fluid (CSF) Aβ42 and only slightly pathological amyloid-positron emission tomography signals. Mass spectrometry and Western blot analyses of patient CSF and media from experimental cell cultures indicate that the mutation alters APP processing by increasing β-secretase cleavage and affecting α-secretase cleavage. Furthermore, in vitro aggregation studies and analyses of patient brain tissue samples indicate that the longer form of mutated Aβ, AβUpp1-42, accelerates the formation of fibrils with unique polymorphs and their deposition into amyloid plaques in the affected brain.