Co-overexpression of Janus kinase 2 and signal transducer and activator of transcription 5a promotes differentiation of mammary cancer cells through reversal of epithelial-mesenchymal transition.
The patients whose primary breast tumors were Stat5 positive, had significantly better response to endocrine therapy (P=0.04), and longer survival after relapse (P=0.0003), than those whose tumors were Stat5 negative.
The patients whose primary breast tumors were Stat5 positive, had significantly better response to endocrine therapy (P=0.04), and longer survival after relapse (P=0.0003), than those whose tumors were Stat5 negative.
STAT5 may be a crucial point of signaling for both E2 and growth factors in breast cancer cells, allowing targeted therapy for many types of breast tumors.