Figure 4
From: MMP-9 expression varies according to molecular subtypes of breast cancer
Expression of MMP-9 in normal breast tissue. (A) Normal breast lobule lacking MMP-9 expression in both luminal and myoepithelial cells. Adjacent stromal cells also fail to express MMP-9 (74% of the patients). (B) Normal breast tissue exhibiting faint expression of MMP-9 in the cytoplasm of luminal cells, myoepithelial cells and in a few stromal cells surrounding normal breast acini. A &B are two distinct normal breast tissue from the same TMA incubated with anti-MMP9 antibody. Magnification 40X (A&B), 63X inset in Figure 4B.