SLC20A1 and glioblastoma: SLC20A1 and SLC20A2 expressions has also been reported in various breast cancer xenograft models (HBCx-3, HBCx-4A, HBCx-8, HBCx-24, and HBCx-30) [59], tongue squamous cell carcinoma (SCC4, SCC9, SCC15, SCC25, Tca8113, UM1, and UM2) [60], glioblastoma lines (G111, grade II astrocytoma; U-87-MG, grade III astrocytoma; and G152, grade IV glioblastoma) [61], and a prostate cancer cell line (PC-3) [62].