In breast cancer cells (BCCs), leptin induces EMT by β-Catenin activation through AKT/glycogen synthase kinase 3 beta (GSK3β) and metastasis-associated protein 1 (MTA1)/Wnt family member 1 (Wnt1) pathways, as well as functional interactions between leptin, Wnt1 signaling components and MTA1—an important modifier of Wnt1 signaling [150]. This evidence concerns the gene GSK3B and breast cancer.