title: Multi-CSF-dependent colony formation by cells of a murine hemopoietic cell line: specificity and action of multi-CSF.
abstract: Cells of the Multi-CSF (IL-3)-dependent hemopoietic cell line 32D c13 formed colonies of varying size in agar cultures stimulated by Multi-CSF. Colony formation was linear with respect to cultured cell numbers; colony numbers and size increased with increasing concentrations of Multi-CSF, and 32D colonies themselves contained a high frequency of clonogenic cells. Clonogenic 32D cells died in the absence of Multi-CSF (half-life six hours), and most were unable to complete cell cycles in progress at the time of withdrawal of Multi-CSF. The concentration of Multi-CSF directly influenced the length of the cell cycle of dividing 32D cells. Purified GM-CSF, G-CSF, or M-CSF had no capacity to support the survival or proliferation of 32D cells. Colonies formed by 32D cells appear to offer a useful model for analyzing the action of Multi-CSF in controlling self-renewal by clonogenic hemopoietic cells.
mesh_terms: D000818:Animals; D002453:Cell Cycle / Q000187:drug effects; D002455:Cell Division / Q000187:drug effects; D002460:Cell Line; D002999:Clone Cells / Q000166:cytology / Q000502:physiology; D003114:Colony-Forming Units Assay; D003115:Colony-Stimulating Factors / Q000494:pharmacology*; D006098:Granulocytes / Q000166:cytology; D006133:Growth Substances / Q000494:pharmacology*; D016298:Hematopoietic Cell Growth Factors; D006412:Hematopoietic Stem Cells / Q000166:cytology / Q000502:physiology*; D008264:Macrophages / Q000166:cytology; D051379:Mice; D008810:Mice, Inbred C57BL; D013997:Time Factors
chemical_list: D003115:Colony-Stimulating Factors; D006133:Growth Substances; D016298:Hematopoietic Cell Growth Factors