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- W2802209912 abstract "Abstract Silent glutamatergic synapses lacking functional AMPA (α‐amino‐3‐hydroxy‐5‐methyl‐4‐isoxazoleproprionate) receptors exist in several brain regions including the hippocampus. Their involvement in the dysfunction of hippocampal glutamatergic transmission in the setting of Alzheimer's disease (AD) is unknown. This study demonstrated a decrease in the percentage of silent synapses in rats microinjected with amyloid fibrils (Aβ 1–40 ) into the hippocampal CA1. Also, pairing low‐frequency electric stimuli failed to induce activation of the hippocampal silent synapses in the modeled rats. Immunoblotting studies revealed a decreased expression of GluR1 subunits in the hippocampal CA1 synaptosomal preparation, indicating a potential reduction in the GluR1 subunits anchoring in postsynaptic density in the modeled rats. We also noted a decreased expression of phosphorylated cofilin, which regulates the function of actin cytoskeleton and receptor trafficking, and reduced expression of the scaffolding protein PSD95 in the hippocampal CA1 synaptosome in rats injected with Aβ 1–40 . Taken together, this study illustrates dysfunction of hippocampal silent synapse in the rodent model of AD, which might result from the impairments of actin cytoskeleton and postsynaptic scaffolding proteins induced by amyloid fibrils." @default.
- W2802209912 created "2018-05-17" @default.
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- W2802209912 date "2018-05-07" @default.
- W2802209912 modified "2023-09-26" @default.
- W2802209912 title "Amyloid fibrils induce dysfunction of hippocampal glutamatergic silent synapses" @default.
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- W2802209912 doi "https://doi.org/10.1002/hipo.22955" @default.
- W2802209912 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6133714" @default.
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