INS and type 2 diabetes mellitus: But after the treatment of insulin (insulin group), the fluorescence intensity of Caveolin-1 and GLUT4 was enhanced compared with the T2DM group (fluorescence intensity of Caveolin-1: 12.08 ± 2.35 vs. 6.74 ± 1.35, GLUT4: 8.12 ± 2.44 vs. 5.87 ± 0.98).