Purpose To identify the role of tyrosine kinasereceptor Axl for anti-apoptosis which was induced by cisplatin( DDP) and methotrexate( MTX) chemotherapy and to analyze the relationship between P-Axl and apoptosis-related proteins in osteosarcoma. Methods Osteosarcoma cell lines MG63,143 B and U2 OS were used in apoptosis assays,Axl siRNA transfection,cytotoxicity assays,cell cycle analysis,etc. A total of 41 cases of osteosarcom patients were included for immunohistochemistry of EnV ision two-step staining a...