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• W1825753969 endingPage "178" @default.
• W1825753969 startingPage "167" @default.
• W1825753969 abstract "The cleavage of amyloid precursor protein (APP) by β- and γ-secretases results in the production of amyloid-β (Aβ) in Alzheimer’s disease. We raised two monoclonal antibodies, 2B3 and 2B12, that recognize the β-secretase cleavage site on APP but not Aβ. We hypothesized that these antibodies would reduce Aβ levels via steric hindrance of β-secretase. Both antibodies decreased extracellular Aβ levels from astrocytoma cells, but 2B3 was more potent than 2B12. Levels of soluble sAPPα from the nonamyloidogenic α-secretase pathway and intracellular APP were not affected by either antibody nor were there any effects on cell viability. 2B3 exhibited a higher affinity for APP than 2B12 and its epitope appeared to span the cleavage site, whereas 2B12 bound slightly upstream. Both of these factors probably contribute to its greater effect on Aβ levels. After 60 min incubation at pH 4.0, most 2B3 and 2B12 remained bound to their antigen, suggesting that the antibodies will remain bound to APP in the acidic endosomes where β-secretase cleavage probably occurs. Only 2B3 and 2B12, but not control antibodies, inhibited the cleavage of sAPPα by β-secretase in a cell-free assay where the effects of antibody internalization and intracellular degradation were excluded. 2B3 virtually abolished this cleavage. In addition, levels of C-terminal APP fragments, generated following β-secretase cleavage (βCTF), were significantly reduced in cells after incubation with 2B3. These results strongly suggest that anti-cleavage site IgGs can generically reduce Aβ levels via inhibition of β-secretase by steric hindrance and may provide a novel alternative therapy for Alzheimer’s disease." @default.
• W1825753969 created "2016-06-24" @default.
• W1825753969 creator A5045809090 @default.
• W1825753969 creator A5073194262 @default.
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• W1825753969 date "2010-12-01" @default.
• W1825753969 modified "2023-09-26" @default.
• W1825753969 title "Anti-amyloid precursor protein immunoglobulins inhibit amyloid-β production by steric hindrance" @default.
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• W1825753969 doi "https://doi.org/10.1111/j.1742-4658.2010.07942.x" @default.
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