NDRG1 and triple-negative breast carcinoma: Conversely, when NDRG1-OT1 were specifically knocked down by antisense oligonucleotide (Fig. 6A), the ability of proliferation (Fig. 6B), migration (Fig. 6C), and invasion (Fig. 6D) in triple-negative breast cancer MDA-MB-231 cells were significantly (P < 0.05) decreased.