All analyzed BC cells that had a high content of GalCer (MDA.Δ.C, MCF7.UGT8, and T47D.UGT8) were characterized by considerably increased levels of the anti-apoptotic BCL2 gene and substantially decreased levels of pro-apoptotic TNFRSF1B and TNFRSF9 genes in comparison to BC cells with low content of GalCer (MDA.Δ.UGT8.1, MDA.Δ.UGT8.4, MCF7.C, and T47D.C). Here, TNFRSF9 is linked to breast cancer.