The authors demonstrate that matrix metalloproteinase 11 (MMP11) expression in mononuclear inflammatory cells (predominantly macrophages) is an independent negative prognostic factor in breast cancer, whereas tumoral MMP11 expression is not associated with patient survival. This study also shows that MMP11-overexpressing macrophages promote the migration of HER2-positive breast cancer cells and monocyte recruitment through CCL2-CCR2 signaling, suggesting a pro-tumoral role of MMP11 in macrophages in HER2-positive breast cancer through interaction with cancer cells and other cells in the tumor microenvironment.
- Shin Ung Kang
- Soo Youn Cho
- Mi Jeong Kwon
