Seed-induced Aβ deposition is modulated by microglia under environmental enrichment in a mouse model of Alzheimer's disease.

ABSTRACT: Alzheimer's disease (AD) is characterized by severe neuronal loss as well as the accumulation of amyloid-β (Aβ), which ultimately leads to plaque formation. Although there is now a general agreement that the aggregation of Aβ can be initiated by prion-like seeding, the impact and functional consequences of induced Aβ deposits (Aβ seeding) on neurons still remain open questions. Here, we find that Aβ seeding, representing early stages of plaque formation, leads to a dramatic decrease in proliferation and neurogenesis in two APP transgenic mouse models. We further demonstrate that neuronal cell death occurs primarily in the vicinity of induced Aβ deposits culminating in electrophysiological abnormalities. Notably, environmental enrichment and voluntary exercise not only revives adult neuroge

SUBMITTER: Ziegler-Waldkirch S 

PROVIDER: S-EPMC5770788 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature