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• W2025561374 abstract "During the last 25 years, neuropathological, biochemical, genetic, cell biological and even therapeutic studies in humans have all supported the hypothesis that the gradual cerebral accumulation of soluble and insoluble assemblies of the amyloid β-protein (Aβ) in limbic and association cortices triggers a cascade of biochemical and cellular alterations that produce the clinical phenotype of Alzheimer's disease (AD). The reasons for elevated cortical Aβ42 levels in most patients with typical, late-onset AD are unknown, but based on recent work, these could turn out to include augmented neuronal release of Aβ during some kinds of synaptic activity. Elevated levels of soluble Aβ42 monomers enable formation of soluble oligomers that can diffuse into synaptic clefts. We have identified certain APP-expressing cultured cell lines that form low-n oligomers intracellularly and release a portion of them into the medium. We find that these naturally secreted soluble oligomers – at picomolar concentrations – can disrupt hippocampal LTP in slices and in vivo and can also impair the memory of a complex learned behavior in rats. Aβ trimers appear to be more potent in disrupting LTP than are dimers. The cell-derived oligomers also decrease dendritic spine density in organotypic hippocampal slice cultures, and this decrease can be prevented by administration of Aβ antibodies or small-molecule modulators of Aβ aggregation. This therapeutic progress has been accompanied by advances in imaging the Aβ deposits non-invasively in humans. A new diagnostic–therapeutic paradigm to successfully address AD and its harbinger, mild cognitive impairment–amnestic type, is emerging." @default.
• W2025561374 created "2016-06-24" @default.
• W2025561374 creator A5087935119 @default.
• W2025561374 date "2008-09-01" @default.
• W2025561374 modified "2023-10-10" @default.
• W2025561374 title "Soluble oligomers of the amyloid β-protein impair synaptic plasticity and behavior" @default.
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• W2025561374 doi "https://doi.org/10.1016/j.bbr.2008.02.016" @default.
• W2025561374 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2601528" @default.
• W2025561374 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/18359102" @default.
• W2025561374 hasPublicationYear "2008" @default.
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