title: The c-kit proto-oncogene in normal and malignant human hematopoiesis.
abstract: The c-kit proto-oncogene encodes a tyrosine kinase receptor (KIT) which is expressed on many types of human cells. Numerous studies attest to the importance of the c-kit receptor and its ligand, known variously as stem cell factor (SCF), mast cell growth factor (MGF), Steel factor (SF), or kit ligand (KL) (the nomenclature we prefer), in the development of human hematopoietic cells. KL, which is produced in membrane-bound and soluble forms by bone marrow stromal cells, acts on pre-colony forming units (pre-CFU) and CFU cells. In synergistic combination with other cytokines, KL enhances the growth of myeloid progenitor cells. However, using an antisense oligodeoxynucleotide strategy to disrupt c-kit function, we have demonstrated that the KL-KIT complex is of greatest importance for generation and/or proliferation of normal human erythropoietic progenitor cells. In malignant hematopoietic cells, the complex also appears to be important for growth of granulocyte/macrophage (GM) CFU as well.
authors.affiliation: Department of Pathology, University of Pennsylvania School of Medicine, Philadelphia 19104.
authors.forename: M Z
authors.initials: MZ
authors.lastname: Ratajczak
authors.forename: S M
authors.initials: SM
authors.lastname: Luger
authors.forename: A M
authors.initials: AM
authors.lastname: Gewirtz
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D006410:Hematopoiesis / Q000235:genetics; D006412:Hematopoietic Stem Cells / Q000502:physiology*; D006801:Humans; D008969:Molecular Sequence Data; D009190:Myelodysplastic Syndromes / Q000235:genetics / Q000503:physiopathology*; D000090063:Proto-Oncogene Mas; D011518:Proto-Oncogene Proteins / Q000235:genetics / Q000502:physiology*; D019009:Proto-Oncogene Proteins c-kit; D015398:Signal Transduction / Q000502:physiology
chemical_list: C000715470:MAS1 protein, human; D000090063:Proto-Oncogene Mas; D011518:Proto-Oncogene Proteins; D019009:Proto-Oncogene Proteins c-kit