FKBP14 and osteosarcoma: In cultured osteosarcoma cell lines, we found that U-2OS and MG63 cells presented a highly expression of FKBP14 and 143B cells with a low levels of FKBP14 expression in comparison with other osteosarcoma cells, thus these three cells were used for our following experiments to investigate the roles for FKBP14 in osteosarcoma via RNA interfering or overexpression.