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- W2001967018 abstract "Abstract Background: The incidence of Alzheimer disease may increase after surgical interventions. Amyloid β-protein (Aβ) fibrillogenesis, which is closely related to Alzheimer disease, is reportedly accelerated by exposure to anesthetics. However, the effects of GM1 ganglioside (GM1) on Αβ fibrillogenesis have not yet been reported. The current study was designed to examine whether the anesthetics propofol and thiopental are associated with Αβ assembly and GM1 expression on the neuronal cell surface. Methods: PC12N cells and cultured neuronal cells were treated with propofol or thiopental, and GM1 expression in treated and untreated cells was determined by the specific binding of horseradish peroxidase-conjugated cholera toxin subunit B (n = 5). The effects of an inhibitor of the γ-aminobutyric acid A receptor was also examined (n= 5). In addition, the effects of the anesthetics on GM1 liposome-induced Αβ assembly were investigated (n = 5). Finally, the neurotoxicity of the assembled Αβ fibrils was studied by the lactate dehydrogenase release assay (n = 6). Results: Propofol (31.2±4.7%) and thiopental (34.6±10.5%) decreased GM1 expression on the cell surface through the γ-aminobutyric acid A receptor. The anesthetics inhibited Αβ fibril formation from soluble Αβ in cultured neurons. Moreover, propofol and thiopental suppressed GM1-induced fibril formation in a cell-free system (propofol, 75.8±1.9%; thiopental, 83.6±1.9%) and reduced the neurotoxicity of a mixture containing Aβ and GM1 liposomes (propofol, 35.3±16.4%; thiopental, 21.3±11.6%). Conclusions: Propofol and thiopental have direct and indirect inhibitory effects on Αβ fibrillogenesis." @default.
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- W2001967018 date "2013-06-01" @default.
- W2001967018 modified "2023-10-13" @default.
- W2001967018 title "Propofol and Thiopental Suppress Amyloid Fibril Formation and GM1 Ganglioside Expression through the γ-Aminobutyric Acid A Receptor" @default.
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- W2001967018 doi "https://doi.org/10.1097/aln.0b013e31828afc16" @default.
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