title: Changes in phenotype and proliferative potential of human acute myeloblastic leukemia cells in culture with stem cell factor.
abstract: The interaction of the proto-oncogene c-kit product with its ligand (stem cell factor or SCF) is considered to play crucial roles in hematopoiesis. In a series of human acute myeloblastic leukemia (AML) cells, the effects of recombinant human (rh) SCF on AML cells were examined in short-term and long-term cultures. c-kit expression was detected in 26 of 31 AML cases, and short-term treatment of AML cells with rhSCF led to proliferation in 13 of 18 AML cases that expressed the c-kit product. In seven of the 13 cases showing proliferative response to rhSCF, AML cells were exclusively composed of immature blast cells. We therefore used the seven AML cases for examining the effect of rhSCF on the differentiation and proliferation of AML cells in a long-term culture. Proliferation of AML cells was found to be maintained with rhSCF more than 2 weeks in five of seven cases and 4 weeks in two cases, whereas most of the AML cells died before 2 weeks in the absence of rhSCF. Further, in four of five AML cases, all of which expressed the CD34 antigen and showed a proliferative response to rhSCF in a long-term culture, rhSCF appeared to promote differentiation of blast cells toward lineages of various cell types, such as granulocytic and/or monocytic and mast-cell lineages. These results suggest that, at least in a fraction of AML cases, rhSCF can induce not only proliferation but also differentiation of AML cells, and also that phenotypic manifestation of AML cells may not mean definite cell commitment but can be changed by stimulation with rhSCF.
authors.affiliation: Second Department of Internal Medicine, Osaka University Medical School, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Ikeda
authors.forename: Y
authors.initials: Y
authors.lastname: Kanakura
authors.forename: T
authors.initials: T
authors.lastname: Furitsu
authors.forename: H
authors.initials: H
authors.lastname: Kitayama
authors.forename: H
authors.initials: H
authors.lastname: Sugahara
authors.forename: T
authors.initials: T
authors.lastname: Nishiura
authors.forename: T
authors.initials: T
authors.lastname: Karasuno
authors.forename: Y
authors.initials: Y
authors.lastname: Tomiyama
authors.forename: A
authors.initials: A
authors.lastname: Yamatodani
authors.forename: Y
authors.initials: Y
authors.lastname: Kanayama
mesh_terms: D015703:Antigens, CD / Q000032:analysis; D018952:Antigens, CD34; D015214:Antigens, Differentiation, Myelomonocytic / Q000032:analysis; D018826:CD13 Antigens; D002454:Cell Differentiation; D002455:Cell Division; D003594:Cytoplasmic Granules / Q000473:pathology; D015870:Gene Expression; D006684:HLA-DR Antigens / Q000032:analysis; D016298:Hematopoietic Cell Growth Factors / Q000494:pharmacology*; D006801:Humans; D016130:Immunophenotyping; D015470:Leukemia, Myeloid, Acute / Q000276:immunology / Q000473:pathology*; D000090063:Proto-Oncogene Mas; D011518:Proto-Oncogene Proteins / Q000235:genetics; D019009:Proto-Oncogene Proteins c-kit; D020794:Receptor Protein-Tyrosine Kinases / Q000235:genetics; D016184:Receptors, Colony-Stimulating Factor / Q000235:genetics; D011994:Recombinant Proteins / Q000494:pharmacology; D019089:Stem Cell Factor; D014407:Tumor Cells, Cultured
chemical_list: D015703:Antigens, CD; D018952:Antigens, CD34; D015214:Antigens, Differentiation, Myelomonocytic; D006684:HLA-DR Antigens; D016298:Hematopoietic Cell Growth Factors; C000715470:MAS1 protein, human; D000090063:Proto-Oncogene Mas; D011518:Proto-Oncogene Proteins; D016184:Receptors, Colony-Stimulating Factor; D011994:Recombinant Proteins; D019089:Stem Cell Factor; D019009:Proto-Oncogene Proteins c-kit; D020794:Receptor Protein-Tyrosine Kinases; D018826:CD13 Antigens