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- W1966950577 abstract "Amyloid-beta is involved in neurodegeneration in Alzheimer's disease. The Amyloid-beta fraction 25-35 (Amyloid-beta 25-35) is believed to cause neurotoxicity through oxidative stress. We evaluated the antioxidant effects of Epicatechin on the Aß25-35-caused hippocampal toxicity in vivo. Biochemical and histological evaluations, and learning and memory tasks, were assessed. Amyloid-beta 25-35 (100 µM/µL) or vehicle was injected into the CA1 hippocampal region of the rat 5 h after a single oral dose of Epicatechin (30 mg/kg). Lipid peroxidation and reactive oxygen species formation were measured in Amyloid-beta- and Amyloid-beta–Epicatechin-treated groups at 2 h and 24 h after dosing and formation of the lesion. There was an increase in lipid peroxidation and reactive oxygen species formation at 2-h and 24-h postlesion. Learning and memory tests were made 27–30 days after surgery in independent groups under the same experimental conditions. Immunohistochemical detection of glial–fibrilar acidic protein (GFAP) was evaluated in hippocampal tissues from the animals 30-days postsurgery. Amyloid-beta 25-35 caused a significant increase in lipid peroxidation and reactive oxygen species and a decrease in memory skills. In addition, hippocampal tissues from Amyloid-beta 25-35-treated animals showed an increased immunoreactivity against GFAP. In contrast, animals pretreated with Epicatechin had a significant decrease in lipid peroxidation and reactive oxygen species and an improvement in memory skills. GFAP immunoreactivity was also decreased. Our results showed that Amyloid-beta 25-35-caused oxidative damage of the hippocampus was blocked by the administration of Epicatechin." @default.
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- W1966950577 date "2009-08-01" @default.
- W1966950577 modified "2023-10-08" @default.
- W1966950577 title "Antioxidant effects of Epicatechin on the hippocampal toxicity caused by Amyloid-beta 25-35 in rats" @default.
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- W1966950577 doi "https://doi.org/10.1016/j.ejphar.2009.06.013" @default.
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