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• W1413391386 startingPage "209" @default.
• W1413391386 abstract "The most consistent diagnostic neuropathological lesion in Alzheimer's disease (AD) is the senile plaque of which the 4 kD amyloid-beta (Abeta) peptide is the major proteinaceous component. In this study cortical Abeta levels were immunochemically measured in 70 post-mortem human brains and compared against their neuropathological grading as determined by the densities of amyloid plaques and neurofibrillary tangles. The mean concentration of cortical Abeta/mg protein increased with the severity of the cortical degenerative changes (AD0 < AD1 < AD2 < AD3). Brains with the severe degenerative changes (AD3), corresponded to definite AD cases and exhibited significantly increased concentrations of Abeta (11.1+/-3.08 ng/mg total protein, n=17) when compared with control brains without any degenerative changes (AD0; 0.06+/-0.06 ng/mg total protein, n=14,P=0.003). The extraction of Abeta from the cortex of AD3 brains was significantly enhanced in a dose dependent manner by the presence of the metal ion chelator N,N,N',N'-tetrakis(2-pyridylmethyl) ethylenediamine (5 mM TPEN, P < 0.0001). The chelator/antioxidant 1,2-dithiolane-3-pentanoic acid (lipoic acid), also resolubilized Abetain a dose-dependant manner. Both chelators also enhanced the extraction of Abeta from the frontal cortex of AbetaPP-transgenic mice suggesting this animal model of amyloidosis may be useful for evaluating the biochemical and therapeutic effects of chelators/antioxidants on Abeta deposition. In summary our results indicate that increased Abeta load is correlated with the severity of the cortical AD-type changes and that chelators/antioxidants may be useful in reducing neuronal amyloid burden." @default.
• W1413391386 created "2016-06-24" @default.
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• W1413391386 date "2001-05-14" @default.
• W1413391386 modified "2023-10-18" @default.
• W1413391386 title "The severity of cortical Alzheimer's type changes is positively correlated with increased amyloid-β Levels: Resolubilization of amyloid-β with transition metal ion chelators" @default.
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• W1413391386 doi "https://doi.org/10.3233/jad-2001-3206" @default.
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