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Seed-induced acceleration of amyloid-β mediated neurotoxicity in vivo.

Abstract：

:Seeded propagation of amyloid-beta (Aβ) pathology is suggested to contribute to the progression of Alzheimer's disease. Local overproduction of aggregation-prone Aβ variants could explain the focal initiation of a seeding cascade that subsequently triggers widespread pathology. Several animal models support this seeding concept by demonstrating accelerated Aβ deposition following inoculation with Aβ-containing homogenates, however its role in progressive neurodegeneration remains unclear. Here, we present a non-invasive approach to study Aβ seeding processes in vivo using Drosophila models. We show that small amounts of aggregation-competent Aβ42 seeds, generated in selected neuronal clusters, can induce the deposition of the pan-neuronally expressed and otherwise soluble Aβ40. Moreover, our models visualize the accelerated formation and propagation of amyloid pathology throughout the brain, which correlates with severe neurotoxicity. Taken together, these in vivo models provide mechanistic insights into disease-related processes and represent versatile genetic tools to determine novel modifiers of the Aβ seeding cascade.Seeding of amyloid beta from one brain region to another is thought to contribute to the progression of Alzheimer's disease, although to date most studies have depended on inoculation of animals with exogenous amyloid. Here the authors describe a genetic seed and target system in Drosophila which may be useful for the mechanistic study of seeding of amyloid in vivo.

journal_name

Nat Commun

journal_title

Nature communications

authors

Sowade RF,Jahn TR

doi

10.1038/s41467-017-00579-4

subject

Has Abstract

pub_date

2017-09-11 00:00:00

pages

512

issue

1

issn

2041-1723

pii

10.1038/s41467-017-00579-4

journal_volume

8

pub_type

杂志文章

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