TY - JOUR
T1 - Proliferation of human myeloid leukemia cell line associated with the tyrosine-phosphorylation and activation of the proto-oncogene c-kit product
AU - Kuriu, A.
AU - Ikeda, H.
AU - Kanakura, Y.
AU - Griffin, J. D.
AU - Druker, B.
AU - Yagura, H.
AU - Kitayama, H.
AU - Ishikawa, J.
AU - Nishiura, T.
AU - Kanayama, Y.
AU - Yonezawa, T.
AU - Tarui, S.
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 1991
Y1 - 1991
N2 - We investigated the expression, degree of phosphorylation, and activation of the proto-oncogene c-kit product before and after stimulation with the c-kit ligand in a human factor-dependent myeloid leukemia cell line, MO7E. The culture supernatant of the BALB/3T3 fibroblast cell line, which contains the ligand for the murine c-kit product, was found to stimulate proliferation of the MO7E cell line in a dose-dependent manner. The proliferation was significantly inhibited by a tyrosine kinase inhibitor, genistein. An immunoblot technique with a monoclonal antibody specific for phosphotyrosine, showed that there was rapid, dose-dependent tyrosine-phosphorylation of the c-kit product in response to murine c-kit ligand. Furthermore, the murine c-kit ligand increased autokinase activity of the c-kit product in vitro. Similar results were obtained with human stem cell factor (SCF), a recombinant human ligand for the c-kit product. These results suggest that the phosphorylation and activation of the c-kit product are involved in proliferative signals of some human leukemia cells, as well as of normal hematopoietic cells.
AB - We investigated the expression, degree of phosphorylation, and activation of the proto-oncogene c-kit product before and after stimulation with the c-kit ligand in a human factor-dependent myeloid leukemia cell line, MO7E. The culture supernatant of the BALB/3T3 fibroblast cell line, which contains the ligand for the murine c-kit product, was found to stimulate proliferation of the MO7E cell line in a dose-dependent manner. The proliferation was significantly inhibited by a tyrosine kinase inhibitor, genistein. An immunoblot technique with a monoclonal antibody specific for phosphotyrosine, showed that there was rapid, dose-dependent tyrosine-phosphorylation of the c-kit product in response to murine c-kit ligand. Furthermore, the murine c-kit ligand increased autokinase activity of the c-kit product in vitro. Similar results were obtained with human stem cell factor (SCF), a recombinant human ligand for the c-kit product. These results suggest that the phosphorylation and activation of the c-kit product are involved in proliferative signals of some human leukemia cells, as well as of normal hematopoietic cells.
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U2 - 10.1182/blood.v78.11.2834.bloodjournal78112834
DO - 10.1182/blood.v78.11.2834.bloodjournal78112834
M3 - Article
C2 - 1720036
AN - SCOPUS:0025718733
VL - 78
SP - 2834
EP - 2840
JO - Blood
JF - Blood
SN - 0006-4971
IS - 11
ER -