Journal article

Amyloid Precursor Protein Dimerisation Reduces Neurite Outgrowth

Luan Luu, Giuseppe D Ciccotosto, Laura J Vella, Lesley Cheng, Laila C Roisman, Gerhard Multhaup, Andrew F Hill, Lisa-Marie Munter, Roberto Cappai



The amyloid precursor protein (APP) undergoes extensive metabolism, and its transport and proteolytic processing can be modulated by its ability to form a homodimer. We have investigated the functional consequences of stabilised APP dimer expression in cells by studying the engineered dimerisation of the APPL17C (residue 17 in Aβ sequence) construct, which is associated with a 30% increase in APP dimer expression, on APP's neurite outgrowth promoting activity. Overexpression of APPL17C in SH-SY5Y cells decreased neurite outgrowth upon retinoic acid differentiation as compared to overexpressing APPWT cells. The APPL17C phenotype was rescued by replacing the APPL17C media with conditioned medi..

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