title: Antiproliferative and differentiative effect of granulocyte-macrophage colony-stimulating factor on a variant human small cell lung cancer cell line.
abstract: A variant clone was adopted during passages of a small cell lung cancer cell line, GKT3-1.3. The variant clone exhibited distinct characteristics with alterations in morphology, positive staining with nonspecific esterase stain, and an increase in surface specific markers OKM5, HLA-DR, Mo1, and My7, usually found on monocytes or their precursors. However, it exerted a very rapid proliferation just like immature cells. This new clone, GKT3-1.3V, was shown to have specific binding capacity to granulocyte-macrophage colony-stimulating factor (GM-CSF), with a number of binding sites comparable to that of myelomonocytes or monocytic cell lines. Thus its proliferation was inhibited by GM-CSF in clonogenic assay and suspension culture. Increase in the percentage of cells with surface marker Mo1 by the addition of GM-CSF suggested its differentiative effect. Cell cycle analysis showed that the antiproliferative effect of GM-CSF was due to a block in G0 or G1. The antiproliferative effect of GM-CSF was abolished by the addition of anti-GM-CSF antibody.
authors.affiliation: First Department of Internal Medicine, Tokyo Medical and Dental University, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Yamashita
authors.forename: N
authors.initials: N
authors.lastname: Nara
authors.forename: N
authors.initials: N
authors.lastname: Aoki
mesh_terms: D018288:Carcinoma, Small Cell / Q000378:metabolism / Q000473:pathology*; D002452:Cell Count; D002453:Cell Cycle / Q000187:drug effects; D002454:Cell Differentiation / Q000187:drug effects; D002455:Cell Division / Q000187:drug effects; D003115:Colony-Stimulating Factors / Q000378:metabolism / Q000494:pharmacology*; D003470:Culture Media; D004305:Dose-Response Relationship, Drug; D016178:Granulocyte-Macrophage Colony-Stimulating Factor; D006133:Growth Substances / Q000378:metabolism / Q000494:pharmacology*; D006801:Humans; D008175:Lung Neoplasms / Q000378:metabolism / Q000473:pathology*; D014407:Tumor Cells, Cultured / Q000473:pathology; D014410:Tumor Stem Cell Assay
chemical_list: D003115:Colony-Stimulating Factors; D003470:Culture Media; D006133:Growth Substances; D016178:Granulocyte-Macrophage Colony-Stimulating Factor