Representative images of GluA1 immunocytochemical staining before and after cLTP induction in non-permeabilized (surface) and permeabilized (total) cultured hippocampal neurons expressing sh-scr or sh-NPC1 RNAs and treated or not with EFV. Graph shows the mean ± SEM GluA1 surface staining with respect to total after cLTP, as a percentage of the sh-scr baseline (n=20 images per condition from 2 separate experiments, 2-way ANOVA, ***psh-scr < 0.001, **psh-scr+EFV < 0.01, ***psh-NPC1+EFV < 0.001). 