MAFG and breast cancer: MAFG-AS1 overexpression in breast cancer tissue and cells (MCF7, MCF10, SUM149, HCC1937, BT474, Hs578T, SK-BR-3, MDA-MB-468, MDA-MB-231, and T47D) [43–49] revealed that MAFG-AS1 levels positively correlate with tumor size and ki-67 index [48].