Human osteosarcoma (HOS, 143B, MG-63, Saos-2) [57 (link)–67 (link)] and osteoblast (hFOB1.19) [67 (link)] cell lines were obtained from the American Type Culture Collection (Manassas, VA) and maintained in Dulbecco's Modified Eagle Medium (DMEM, Wako, Osaka, Japan) and DMEM/Ham's F12 (Wako), respectively, both supplemented with 10% fetal bovine serum (FBS). The human osteosarcoma U2OS cell line is from the Human Cancer Cell Line Bank at the Kanazawa University Cancer Research Institute. The cells were maintained in RPMI-1640 (Sigma-Aldrich, St. Louis, MO) containing 10% FBS. This cell line was reported to depend on β-catenin signaling for its proliferation and invasion [31 (link)].
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