NFKB1 and cancer: In cancer, aberrant upregulation of UDP-glucose ceramide glucosyltransferase (UGCG), the enzyme responsible for GlcCer synthesis, drives tumor growth, metastasis, and multidrug resistance through activation of pathways such as phosphoinositide 3-kinase/protein kinase B (PI3K/Akt), mitogen-activated protein kinase (MAPK), canonical Wnt pathway (Wnt/β-catenin), and nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) pathways.