Developmental neurobiology | 7 Nov 2017
J Sun and S Roy
Alzheimer’s disease (AD) is characterized by the accumulation of insoluble deposits of Amyloid β (Aβ) in brains. Aβ is derived by sequential cleavage of the amyloid precursor protein (APP) by β-site secretase enzyme (BACE-1) and γ-secretase. Proteolytic processing of APP by BACE-1 is the rate-limiting step in Aβ production, and this pathway is a prime target for AD drug development. Both APP and BACE-1 are membrane-spanning proteins, transported via secretory and endocytic pathways; and the physical interaction of APP and BACE-1 during trafficking is a key cell biological event initiating the amyloidogenic pathway. Here, we highlight recent research on intracellular trafficking/sorting of APP and BACE-1, and discuss how dysregulation of these pathways might lead to enhanced convergence of APP and BACE-1, and subsequent β-cleavage of APP. © 2017 Wiley Periodicals, Inc. Develop Neurobiol, 2017.
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