title: Specific tyrosine kinase inhibitors regulate human osteosarcoma cells in vitro.
abstract: Inhibitors of specific tyrosine kinases are attractive lead compounds for development of targeted chemotherapies for many tumors, including osteosarcoma. We asked whether inhibition of specific tyrosine kinases would decrease the motility, colony formation, and/or invasiveness by human osteosarcoma cell lines (TE85, MNNG, 143B, SAOS-2, LM-7). An EGF-R inhibitor reduced motility of all five cell lines by 50% to 80%. In contrast, an IGF-1R inhibitor preferentially reduced motility by 42% in LM-7 cells and a met inhibitor preferentially reduced motility by 80% in MNNG cells. The inhibitors of EGF-R, IGF-1R, and met reduced colony formation by more than 80% in all tested cell lines (TE85, MNNG, 143B). The EGF-R inhibitor reduced invasiveness by 62% in 143B cells. The JAK inhibitor increased motility of SAOS-2 and LM7 cells without affecting colony formation or invasiveness. Inhibitors of HER-2, NGF-R, and PDGF-Rs did not affect motility, invasiveness, or colony formation. These results support the hypothesis that specific tyrosine kinases regulate tumorigenesis and/or metastasis in osteosarcoma.
authors.affiliation: Department of Orthopaedic Surgery, University Hospitals Case Medical Center, Case Western Reserve University, 11100 Euclid Avenue, 6th Floor Hanna House, Cleveland, OH 44118, USA. pmesserschmittmd@gmail.com
authors.forename: Patrick J
authors.initials: PJ
authors.lastname: Messerschmitt
authors.forename: Ashley N
authors.initials: AN
authors.lastname: Rettew
authors.forename: Robert E
authors.initials: RE
authors.lastname: Brookover
authors.forename: Ryan M
authors.initials: RM
authors.lastname: Garcia
authors.forename: Patrick J
authors.initials: PJ
authors.lastname: Getty
authors.forename: Edward M
authors.initials: EM
authors.lastname: Greenfield
mesh_terms: D001859:Bone Neoplasms / Q000235:genetics*; D045744:Cell Line, Tumor; D054443:Cell Migration Assays; D006801:Humans; D009361:Neoplasm Invasiveness; D014411:Neoplastic Stem Cells / Q000187:drug effects; D012516:Osteosarcoma / Q000235:genetics*; D011505:Protein-Tyrosine Kinases / Q000037:antagonists & inhibitors*; D017526:Receptor, IGF Type 1 / Q000037:antagonists & inhibitors; D014407:Tumor Cells, Cultured
chemical_list: D011505:Protein-Tyrosine Kinases; D017526:Receptor, IGF Type 1