Carbamazepine (Carb) decreases the colocalization of mutant KATPchannels with lysosomes.A, representative immunostaining images show the distribution of HA (green) and LAMP1 (red) in INS-1 cells expressing WT (HA-SUR1/Kir6.2) or mutant (HA-SUR1/Kir6.2-A28V) KATP channels, upon 10 μM Carb treatment for 16 h. B, the bar graph shows the mean fluorescence intensity for colocalization of HA and GM130. Data are presented as the mean ± SEM; n = 4 per group; ∗∗∗p < 0.005 compared with the DMSO-treated cells in each corresponding group; differences were evaluated using two-way ANOVA and Dunnett's post hoc test. The scale bar represents 10 μm. DMSO, dimethyl sulfoxide; HA, hemagglutinin; KATP, ATP-sensitive potassium channel; LAMP1, lysosomal-associated membrane protein 1; SUR1, sulfonylurea receptor 1.