FOXA1 and breast cancer: By integratively analyzing the FOXA1 ChIP-seq and RNA-seq data of tamoxifen-sensitive (MCF7) and tamoxifen-resistant (MCF7/TamR) breast cancer cells, we show that the enhanced or reduced FOXA1 chromatin binding densities may synchronize the transcriptional activity in tamoxifen resistance, and identify one super enhancer associated lncRNAs ATP1A1−AS1 that may exert important functions in tamoxifen resistance.