3.4.21.109 matriptase 184A1N4 cell - 3.4.21.109 matriptase 184A1N4 cell nontumorigenic mammary epithelial cells 3.4.21.109 matriptase 184A1N4 cell proportional increases or decreases in matripase and hepatocyte growth factor activator inhibitor-1 3.4.21.109 matriptase 184A1N4 cell mammary epithelial cell line