Fig. 7.

Stable knockdown of Syt-1 reduces endogenous APP-CTF, Aβ and sAPPβ levels in PC12 cells. a Stable knockdown of Syt-1 in PC12 cells reduces endogenous APP-CTF levels as revealed by Western blot analysis. Knock down of Syt-1 was confirmed with a Syt-1 specific antibody (Synaptic Systems) and a GAPDH antibody was used for equal protein loading. b Quantitative analysis of sandwich ELISA shows lower Aβ₄₀ and Aβ₄₂ levels in the conditioned media of the PC12 cells with stable Syt-1 KD as compared to the WT cells (student t test; **, p < 0.01; n = 3 for each condition). c Western blot analysis of conditioned media shows a significant reduction in total sAPPβ levels in stable Syt-1 KD PC12 cells as compared to the WT cells. d Quantitative analysis of total sAPPβ levels in the conditioned media of the WT PC12 cells and stable Syt-1 KD PC12 cells (student t test; **, p < 0.01; n = 3 for each condition)