Fig. 4

Gene expression analysis. The graphs showing normalized fold expression for the genes: transforming growth factor beta 1 (a), metalloproteinase-2 (b), metalloproteinase-9 (c), metalloproteinase-13 (d) and type I collagen (e). Data represent the mean ± SD of six independent experiments. The t student is evaluated respect to the control (*p < 0.01), (§p < 0.05)