CCK-8 from these assays revealed that the absence of LncRNA MAFG-AS1 in MDA-MB-231 and T-47D could suppress the breast cancer proliferation activity dramatically (Fig. 2C), and over-expressing LncRNA MAFG-AS1 could promote the breast cancer cells proliferation activity clearly (Fig. 2D). The gene discussed is MAFG; the disease is breast carcinoma.