ERBB2 and breast cancer: Even though the variation for the lncATB expression level was noticed in different breast cancer cell lines, however, the average expression level of lncATB was relative higher in four TNBC cell lines (MDA-MB-231, MDA-MB-436, BT-549 and BT-20) and two Her-2-positive cell lines (SKBR3 and MDA-MB-435) than two luminal A cell lines (MCF-7 and T47D) (Fig. 1a).