NR4A3 and breast cancer: Second, we investigated NR4A3 expression with immunohistochemical staining in xenograft tumors generated from BC cells overexpressing miR-665 (LV-miR-665-ZR-70-30 cells), and found that NR4A3 was downregulated in these tumors compared with that in the control tumors generated from LV-miR-control-ZR-70-30 cells (Fig S4A).