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- W2000789260 abstract "Abstract Calnuc, a Golgi calcium binding protein, plays a key role in the constitution of calcium storage. Abnormal calcium homeostasis has been linked to Alzheimer’s disease (AD). Excessive production and/or accumulation of β‐amyloid (Aβ) peptides that are proteolytically derived from the β‐amyloid precursor protein (APP) have been linked to the pathogenesis of AD. APP has also been indicated to play multiple physiological functions. In this study, we demonstrate that calnuc interacts with APP through direct binding to the carboxyl‐terminal region of APP, possibly in a calcium‐sensitive manner. Immunofluorescence study revealed that the two proteins co‐localize in the Golgi in both cultured cells and mouse brains. Over‐expression of calnuc in neuroblastoma cells significantly reduces the level of endogenous APP. Conversely, down‐regulation of calnuc by siRNA increases cellular levels of APP. Additionally, we show that over‐expression of calnuc down‐regulates the APP mRNA level and inhibits APP biosynthesis, which in turn results in a parallel reduction of APP proteolytic metabolites, sAPP, CTFs and Aβ. Furthermore, we found that the level of calnuc was significantly decreased in the brain of AD patients as compared with that of age‐matched non‐AD controls. Our results suggest a novel function of calnuc in modulating the levels of APP and its proteolytic metabolites, which may further affect the patho/physiological functions of APP including AD pathogenesis." @default.
- W2000789260 created "2016-06-24" @default.
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- W2000789260 date "2006-11-13" @default.
- W2000789260 modified "2023-10-16" @default.
- W2000789260 title "Calnuc binds to Alzheimer’s β‐amyloid precursor protein and affects its biogenesis" @default.
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- W2000789260 doi "https://doi.org/10.1111/j.1471-4159.2006.04336.x" @default.
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