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• W2071356849 endingPage "10685" @default.
• W2071356849 startingPage "10674" @default.
• W2071356849 abstract "The accumulation of the β-amyloid peptide (Aβ) in Alzheimer's disease (AD) is thought to play a causative role in triggering synaptic dysfunction in neurons, leading to their eventual demise through apoptosis. Aβ is produced and secreted upon sequential cleavage of the amyloid precursor protein (APP) by β-secretases and γ-secretases. However, while Aβ levels have been shown to be increased in the brains of AD patients, little is known about how the cleavage of APP and the subsequent generation of Aβ is influenced, or whether the cleavage process changes over time. It has been proposed that Aβ can bind APP and promote amyloidogenic processing of APP, further enhancing Aβ production. Proof of this idea has remained elusive because a clear mechanism has not been identified, and the promiscuous nature of Aβ binding complicates the task of demonstrating the idea. To work around these problems, we used an antibody-mediated approach to bind and cross-link cell-surface APP in cultured rat primary hippocampal neurons. Here we show that cross-linking of APP is sufficient to raise the levels of Aβ in viable neurons with a concomitant increase in the levels of the β-secretase BACE1. This appears to occur as a result of a sorting defect that stems from the caspase-3-mediated inactivation of a key sorting adaptor protein, namely GGA3, which prevents the lysosomal degradation of BACE1. Together, our data suggest the occurrence of a positive pathogenic feedback loop involving Aβ and APP in affected neurons possibly allowing Aβ to spread to nearby healthy neurons." @default.
• W2071356849 created "2016-06-24" @default.
• W2071356849 creator A5070878515 @default.
• W2071356849 creator A5084438848 @default.
• W2071356849 creator A5087347283 @default.
• W2071356849 date "2012-08-01" @default.
• W2071356849 modified "2023-10-02" @default.
• W2071356849 title "Cross-Linking of Cell Surface Amyloid Precursor Protein Leads to Increased -Amyloid Peptide Production in Hippocampal Neurons: Implications for Alzheimer's Disease" @default.
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• W2071356849 doi "https://doi.org/10.1523/jneurosci.6473-11.2012" @default.
• W2071356849 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3539764" @default.
• W2071356849 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22855816" @default.

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