and is refractory to current targeted therapies. Using a genetic screen, we identify the
PTPN12 tyrosine phosphatase as a tumor suppressor in TNBC. PTPN12 potently
suppresses mammary epithelial cell proliferation and transformation. PTPN12 is frequently
compromised in human TNBCs, and we identify an upstream tumor-suppressor network that
posttranscriptionally controls PTPN12. PTPN12 suppresses transformation by interacting …