title: Differing kinase activity of the c-yes and c-src gene proteins in TPA-induced megakaryocytic differentiation of T-33 and K562 cell lines.
abstract: We examined the protein kinase (PK) activity of the c-yes and c-src gene proteins (c-YES, c-SRC) at an early phase of 12-O-tetradecanoyl phorbol-13-acetate (TPA)-induced megakaryocytic differentiation of T-33 and K562 cells with use of immunoprecipitation and in vitro kinase assay. We found that c-SRC PK activity of TPA-treated T-33 and K562 cell lines had been enhanced compared with the untreated ones, but in contrast, no enhancement of c-YES PK activity by the TPA treatment was observed in these cell lines. We also examined PK activity in TPA-induced monocytic differentiation of U937 monoblastic cells that exhibited no megakaryocytic markers and found that both the c-YES and c-SRC PK activity was enhanced by the TPA treatment. Our data suggest that c-YES and c-SRC play different and unique roles in TPA-induced megakaryocytic differentiation in T-33 and K562 cells.
authors.affiliation: Department of Toxicology, Tokyo Metropolitan Research Laboratory of Public Health, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Aoki
authors.forename: M
authors.initials: M
authors.lastname: Maruki
authors.forename: H
authors.initials: H
authors.lastname: Miyazaki
authors.forename: T
authors.initials: T
authors.lastname: Tange
mesh_terms: D002454:Cell Differentiation / Q000187:drug effects; D016391:Genes, src / Q000502:physiology*; D006801:Humans; D008533:Megakaryocytes / Q000166:cytology* / Q000201:enzymology*; D011505:Protein-Tyrosine Kinases / Q000378:metabolism*; D011518:Proto-Oncogene Proteins / Q000235:genetics*; D051575:Proto-Oncogene Proteins c-yes; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology*; D014407:Tumor Cells, Cultured; D019061:src-Family Kinases
chemical_list: D011518:Proto-Oncogene Proteins; D011505:Protein-Tyrosine Kinases; D051575:Proto-Oncogene Proteins c-yes; D019061:src-Family Kinases; D013755:Tetradecanoylphorbol Acetate