GATA3 and breast cancer: We therefore relied on lentiviral-based transduction of BC cells with HA-tagged neoGATA3 cDNA (HA-neoG3) and used Flag-tagged WT GATA3 cDNA (Flag-wtG3) or an empty vector as controls, to account for the effect of increased GATA3 protein dosage following neoGATA3 overexpression.