Fig. 6

DPP involved in the expressions of Aβ and β-secretase. SK-N-MC cells were incubated for 24 h with or without palmitate, and with different concentrations of linagliptin, thereby analyzed with Aβ generation and β-secretase activity. Data are presented as means ± SD (n = 3) and analysed with ANOVA. *p < 0.05, **p < 0.01, ***p < 0.001, compared with the control. #p < 0.05, #p < 0.01, #p < 0.001 compared with the palmitate-treated only