GATA3 and breast cancer: Because FoxA1 and GATA3 transcription factors play a central role in the differentiation of urothelial cells, and their high expression is a key feature of the luminal subtype of BCs [5–14], we sought to elucidate whether and how GABPA dictates luminal identity or differentiation of BC cells by analyzing the relationship between GABPA and FoxA1/GATA3.