alexa Fibrillar beta-amyloid impairs the late phase of long term potentiation.
Neurology

Neurology

Journal of Alzheimers Disease & Parkinsonism

Author(s): Puzzo D, Arancio O

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Synaptic dysfunction is involved in early stages of Alzheimer's disease (AD). Amyloid-beta peptides (Abeta), a neuropathologic hallmark of the disease, have been shown to alter synaptic function. Given that Abeta is present in different forms including monomeric, oligomeric and fibrillar species, we have investigated whether fibrillar Abeta impairs synaptic function. Here we report that a synthetic fibrillar form of Abeta impairs the late protein-synthesis dependent phase of LTP without affecting the early protein-synthesis independent phase. These findings add to previous reports that Abeta oligomers are highly toxic to cells and might cause synaptic dysfunction, and suggest that a therapeutic intervention in AD should include the use of drugs inhibiting and disassembling fibril formation in addition to drugs inhibiting oligomers formation.

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This article was published in Curr Alzheimer Res and referenced in Journal of Alzheimers Disease & Parkinsonism

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