Fig. 2

Sar1a subtly affects APP processing in vitro. a Full-length APP levels are not altered by Sar1a expression. Immunoblots of N2A695 cells transiently transfected with vectors expressing GFP, Sar1a, scrambled shRNA, or shRNA specific to Sar1a. Open arrowhead, APP; closed arrowhead, CTF-β and CTF-ɑ. b Sar1a expression does not significantly alter extracellular amyloid-beta levels. Conditioned media from N2A695 cells overexpressing or silencing Sar1a were analyzed by ELISA and resulting values were expressed relative to control. c Sar1a expression does not significantly alter sAPP levels. Quantification of immunoblots of sAPPalpha, sAPPbeta, and sAPPtotal. d Sar1a overexpression alters CTF-β and CTF-ɑ. Quantification of immunoblots of full-length APP, CTF-β, and CTF-ɑ. Graphs represent mean ± SEM from at least three independent experiments. *p value < 0.05