MAFG and bladder transitional cell carcinoma: Patients with bladder urothelial carcinoma cells highly expressing the LncRNA MAFG-AS1 positively regulate MAFG gene expression by recruiting histone acetyltransferase p300 through cis-regulatory effects and promoting acetylation of the histone H3 lysine 27 site (H3K27ac) on the MAFG genome.