FBXL19 and breast cancer: In addition, qRT-PCR showed that FBXL19-AS1 expression was increased in BC cell lines (MDA-MB-231, ZR-75-1, MCF-7, BT-549, MDA-MB-468, Bcap37, and T47D) compared with Hs578Bst cells (Figure 1F; P<0.05).