title: Generation of a conditionally immortalized myeloid progenitor cell line requiring the presence of both interleukin-3 and stem cell factor to survive and proliferate.
abstract: The H-2Kappab temperature-sensitive (ts) A58 transgenic (Immorto) mouse has been used previously to generate conditionally immortalized cells from a number of tissues. The present study aimed to investigate characteristics of primitive myeloid precursor cells derived from H-2Kappab-tsA58 bone marrow. Cell populations were enriched for granulocyte/macrophage progenitors by centrifugal elutriation, and were cultured in the presence and absence of cytokines at the permissive and restrictive temperatures for the A58 oncogene. Cells derived from H-2Kappab-tsA58 mice required both A58 activation and the growth factors, stem cell factor (SCF) and interleukin-3 (IL-3), for long-term cell survival and growth; cells were maintained for > 300 d in culture under these conditions. IL-3- and SCF-dependent clonal cell lines were derived with a phenotype (lin-, Sca-1+, CD34+, ER-MP 58+, ER-MP 12+, ER-MP 20-) characteristic of primitive myeloid progenitors. These cells differentiated on addition of granulocyte/macrophage colony-stimulating factor (GM-CSF) or macrophage colony-stimulating factor (M-CSF) and acquired mature cell morphology with some upregulation of differentiation markers. In conclusion, the A58 oncogene can immortalize haemopoietic progenitor cells. These cells require two cytokines for growth, IL-3 and SCF; as such, they constitute a useful resource for the study of synergistic interactions between growth factors. The ability to develop monocytic cell characteristics also permits the investigation of cytokine-mediated early haemopoietic progenitor cell development.
authors.affiliation: Department of Protein Therapeutics, Celera Genomics, Rockville, MD, USA.
authors.forename: Candy
authors.initials: C
authors.lastname: Lee
authors.forename: Caroline A
authors.initials: CA
authors.lastname: Evans
authors.forename: Elaine
authors.initials: E
authors.lastname: Spooncer
authors.forename: Andrew
authors.initials: A
authors.lastname: Pierce
authors.forename: Rachel
authors.initials: R
authors.lastname: Mottram
authors.forename: Anthony D
authors.initials: AD
authors.lastname: Whetton
mesh_terms: D000818:Animals; D001854:Bone Marrow Cells / Q000166:cytology; D002454:Cell Differentiation / Q000187:drug effects / Q000502:physiology; D002455:Cell Division / Q000187:drug effects / Q000502:physiology; D002460:Cell Line; D002478:Cells, Cultured; D003114:Colony-Forming Units Assay; D006133:Growth Substances / Q000494:pharmacology; D006183:H-2 Antigens / Q000235:genetics; D006412:Hematopoietic Stem Cells / Q000166:cytology* / Q000187:drug effects; D007377:Interleukin-3 / Q000494:pharmacology*; D051379:Mice; D008822:Mice, Transgenic; D011994:Recombinant Proteins / Q000494:pharmacology; D019089:Stem Cell Factor / Q000494:pharmacology*; D017154:Stromal Cells / Q000166:cytology
chemical_list: D006133:Growth Substances; D006183:H-2 Antigens; C032876:H-2Kb protein, mouse; D007377:Interleukin-3; D011994:Recombinant Proteins; D019089:Stem Cell Factor