Fig 1: BG45 increased the cell surface levels of AMPA receptor subunits. (A) Immunostaining for cell surface GluA1, GluA2, and GluA3 receptors on GFP- and APPsw-positive cells treated with vehicle or BG45 (15 µM). The lower images show the positive cells magnified in the white box. (B) Quantification of the cell surface GluA1 levels. (C) Quantification of the cell surface GluA2 levels. (D) Quantification of the cell surface GluA3 levels. Scale bar = 50 µm (A). Significant differences were determined using Student’s t-test. All values are presented as the means ± SD from three independent experiments. * p < 0.05, ** p < 0.01.