SLC2A4 and type 2 diabetes mellitus: Furthermore, aberrant reductions in both GLUT4 levels (Fig. 4G-H) and p-AMPK/AMPK ratios (Fig. 4I) in muscles were also observed in STZ-induced T2DM mice, whereas TG treatment increased the GLUT4 expression levels as well as the ratio of p-AMPK/AMPK in the muscles of T2DM mice in a dose-dependent manner (Fig. 4G-I).