Exosomal MMP-1 Transfers Metastasis Potential in Triple-Negative Breast Cancer through PAR1-Mediated EMT

MDA-MB-231-HM cells secreted exosomes enriched matrix metalloproteinase-1 (MMP-1), which could be taken up and enhanced invasion and migration activities of TNBC cells, including MDA-MB-231, MDA-MB-468 and BT549.