Anti app

Cortical neurons derived from PDAPP Becn1^+/+ and PDAPP Becn1^FA/FA embryos were grown on poly-L-lysine coated culture slides. Cells (9 DIV) were then fixed in 4% paraformaldehyde and permeabilized with 0.3% Triton X-100. Slides were blocked for 1 h in PBS containing 1% BSA and 2% normal goat serum and then incubated overnight at 4°C with primary antibodies: anti-APP (Biolegend; 803001) and anti-Rab5 (Cell Signaling Technology; 3547) or anti-Rab7 (Cell Signaling Technology; 9367). After washing, slides were incubated with species-specific Alexa-dye conjugated secondary antibodies for 1 h at room temperature. Slides were sealed with coverslip using mounting medium containing DAPI (Vectashield) and then analyzed by confocal microscopy. Confocal images were collected on Nikon A1 microscope using a 60x oil immersion objective lens and NIS Elements software. The Mander’s colocalization coefficient and the fluorescence intensity profile were generated using the NIS Element software.

Cell or mouse muscle and brain extracts were prepared in lysis buffer containing 50 mM Tris (pH 7.4), 150 mM NaCl, 1 mM EDTA, 1% Triton X-100, halt proteinase inhibitor cocktail (ThermoFisher Scientific) and halt phosphatase inhibitor cocktail (ThermoFisher Scientific), and subjected to western blot analysis with anti-LC3 (Novus Biologicals, NB100-2220), anti-SQSTM1 (Abnova, H00008878-M01), anti-Aβ42 (Invitrogen; 700254), anti-APP (Biolegend; 803001), HRP-conjugated GFP antibody (Santa Cruz Biotechnology, sc9996), anti-HA (Cell Signaling Technology, C29F4), anti-ATG7 (Sigma Aldrich, A2856), anti-LDLR (Abcam, ab52818), anti-LRP1 (Abcam, ab92544), and anti-ACTB/β-actin-HRP (Santa Cruz Biotechnology, sc47778 HRP) antibodies. The band intensity was analyzed using the ImageJ software.