Figure 8. The result of densitometry values of MMP 2 and 9. The effect of rapamycin on the expression of matrix metalloprotein (MMP)-2 and −9 was determined by Gelatin zymography. Three independent experiments were conducted. Bars represent standard deviation (SD), and the data were shown as mean±SD. The asterisk (*) indicates p<0.05 in comparison between each rapamycin group and the scratch group with independent samples t-test. a, scratch group; b₁, 10 ng/ml rapamycin group; b₂, 100 ng/ml rapamycin group; b₃, 1000 ng/ml rapamycin group; c, no-scratch group.