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• W64453280 abstract "The vascular hypothesis of Alzheimer’s disease (AD) considers cerebral hypoperfusion as a primary trigger for neuronal dysfunction. We have previously reported that red blood cells (RBCs) bind amyloid, which are the characteristic deposits found in AD brains, and interact with amyloid on the vasculature [1–3]. Oxidative stress triggered by these RBC/amyloid interactions could impair oxygen delivery. Recent literature has implicated copper bound amyloid-β peptide (CuAβ) and the associated production of reactive oxygen species (ROS) as one of the primary factors contributing to AD pathology. In this work, we have investigated CuAβ generated RBC oxidative stress. Aβ1–40 peptide with a stoichiometric amount of copper bound was produced and compared to the metal-free form of the peptide. Different aggregation states of the peptides were isolated and incubated with RBCs for 15 h. Interestingly, CuAβ stimulated a pronounced increase in red cell oxidative stress as indicated by increased hemoglobin (Hb) oxidation, increased formation of fluorescent heme degradation products, and a decrease in RBC deformability. These findings demonstrate a potential role for CuAβ in promoting vascular oxidative stress leading to impaired cerebral oxygen delivery, which may contribute to neurodegeneration associated with AD." @default.
• W64453280 created "2016-06-24" @default.
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• W64453280 date "2012-07-21" @default.
• W64453280 modified "2023-10-16" @default.
• W64453280 title "Considering the Vascular Hypothesis of Alzheimer’s Disease: Effect of Copper Associated Amyloid on Red Blood Cells" @default.
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• W64453280 doi "https://doi.org/10.1007/978-1-4614-4989-8_19" @default.
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