PropertyValue
?:abstract
  • Amyloid ß-protein (Aß) toxicity is hypothesized to play a seminal role in Alzheimer\'s disease (AD) pathogenesis. However, it remains unclear how Aß causes synaptic dysfunction and synapse loss. We hypothesize that one mechanism of Aß-induced synaptic injury is related to the cleavage of amyloid ß precursor protein (APP) at position D664 by caspases that release the putatively cytotoxic C31 peptide. In organotypic slice cultures derived from mice with a knock-in mutation in the APP gene (APP D664A) to inhibit caspase cleavage, Aß-induced synaptic injury is markedly reduced in two models of Aß toxicity. Loss of dendritic spines is also attenuated in mice treated with caspase inhibitors. Importantly, the time-dependent dendritic spine loss is correlated with localized activation of caspase-3 but is absent in APP D664A cultures. We propose that the APP cytosolic domain plays an essential role in Aß-induced synaptic damage in the injury pathway mediated by localized caspase activation.
is ?:annotates of
?:creator
?:journal
  • Cell_Rep
?:license
  • unk
?:publication_isRelatedTo_Disease
is ?:relation_isRelatedTo_publication of
?:source
  • WHO
?:title
  • Caspase Activation and Caspase-Mediated Cleavage of APP Is Associated with Amyloid ß-Protein-Induced Synapse Loss in Alzheimer\'s Disease
?:type
?:who_covidence_id
  • #32610140
?:year
  • 2020

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