title: Action of the colony-stimulating factor, CSF-1.
abstract: Colony-stimulating factor 1 (CSF-1) is a glycoprotein growth factor that specifically regulates the survival, proliferation and differentiation of mononuclear phagocytes and their precursors via a cell surface receptor selectively expressed on these cell types. The purified receptor is a single glycosylated polypeptide, Mr 165 000, which exhibits CSF-1-dependent autophosphorylation in tyrosine. CSF-1 alone regulates cells of the mononuclear phagocytic series (CSF-1-dependent colony-forming unit [CFU-C]----monoblast----promonocyte----monocyte----macrophage). However, the presence of a multipotent haemopoietic cell growth factor, haemopoietin-1, permits CSF-1 to stimulate precursors of CFU-C to proliferate and differentiate to macrophages. Precursors of CFU-C possess low levels of the CSF-1 receptor but there is an increase in receptor levels on CFU-C just before their differentiation to adherent, proliferating mononuclear phagocytes. As the timing of this developmentally associated increase in receptor expression coincides with the acquisition of responsiveness to CSF-1 alone, it is an early indicator of determination to the mononuclear phagocytic lineage.
mesh_terms: D000818:Animals; D002454:Cell Differentiation / Q000187:drug effects; D002455:Cell Division / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects; D003115:Colony-Stimulating Factors / Q000494:pharmacology*; D006098:Granulocytes / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D006412:Hematopoietic Stem Cells / Q000166:cytology / Q000187:drug effects; D006801:Humans; D008264:Macrophages / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D051379:Mice; D011956:Receptors, Cell Surface / Q000378:metabolism; D016184:Receptors, Colony-Stimulating Factor
chemical_list: D003115:Colony-Stimulating Factors; D011956:Receptors, Cell Surface; D016184:Receptors, Colony-Stimulating Factor