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• W1963529280 abstract "Abstract Disruption of neuronal signaling by soluble β‐amyloid has been implicated in deficits in short‐term recall in the early stages of Alzheimer’s disease. One potential target for β‐amyloid is the synapse, with evidence for differential interaction with both pre‐ and post‐synaptic elements. Our previous work revealed an agonist‐like action of soluble β‐amyloid (pM to nM) on isolated pre‐synaptic terminals to increase [Ca 2+ ]i, with apparent involvement of pre‐synaptic nicotinic receptors. To directly establish the role of nicotinic receptors in pre‐synaptic Ca 2+ regulation, we investigated the pre‐synaptic action of β‐amyloid on terminals isolated from mice harboring either β2 or α7 nicotinic receptor null mutants (knockouts). Average pre‐synaptic responses to β‐amyloid in hippocampal terminals of α7 knockout mice were unchanged, whereas responses in hippocampal terminals from β2 knockout mice were strongly attenuated. In contrast, pre‐synaptic responses to soluble β‐amyloid were strongly attenuated in cortical terminals from α7 knockout mice but were moderately attenuated in cortical terminals from β2 knockout mice. The latter responses, having distinct kinetics, were completely blocked by α‐bungarotoxin. The use of receptor null mutants thus permitted direct demonstration of the involvement of specific nicotinic receptors in pre‐synaptic Ca 2+ regulation by soluble β‐amyloid, and also indicated differential neuromodulation by β‐amyloid of synapses in hippocampus and cortex." @default.
• W1963529280 created "2016-06-24" @default.
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• W1963529280 date "2009-05-12" @default.
• W1963529280 modified "2023-10-12" @default.
• W1963529280 title "Defining pre-synaptic nicotinic receptors regulated by beta amyloid in mouse cortex and hippocampus with receptor null mutants" @default.
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• W1963529280 doi "https://doi.org/10.1111/j.1471-4159.2009.06070.x" @default.
• W1963529280 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3979963" @default.
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