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- W1976601917 abstract "Abstract Amyloid β (Aβ) contributes to neurodegeneration in Alzheimer's disease and provides a close association between molecular events and pathology, although the underlying molecular mechanisms are unclear. In the work described here, Aβ did not induce amyloid precursor protein (APP) expression, but APP processing/trafficking was markedly affected. In COS‐7 cells, Aβ provokes retention of intracellular sAPPα (isAPPα). Intracellular holo‐APP levels remain unchanged, and extracellular total sAPP increases, although extracellular sAPPα alone was not altered significantly. In primary neuronal cultures and PC12 cells, isAPP also increased, but this was mirrored by a decrease in extracellular total sAPP. The isAPP retention was particularly associated with the cytoskeletal fraction. The retention “per se” occurred in vesicular‐like densities, negative for a C‐terminal antibody and strongly positive for the 6E10 antibody, clearly showing abnormal intracellular accumulation of sAPPα in response to Aβ. Our data support a dynamic model for intracellular retention of sAPPα as an early response to Aβ exposure. Particularly noteworthy was the observation that removal of Aβ reversed the isAPP accumulation. Mechanistically, these findings disclose an attractive physiological response, revealing the capacity of cells to deal with adverse effects induced by Aβ. © 2008 Wiley‐Liss, Inc." @default.
- W1976601917 created "2016-06-24" @default.
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- W1976601917 date "2008-12-22" @default.
- W1976601917 modified "2023-10-18" @default.
- W1976601917 title "Intracellular sAPP retention in response to Aβ is mapped to cytoskeleton-associated structures" @default.
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- W1976601917 doi "https://doi.org/10.1002/jnr.21959" @default.
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