title: The human bladder carcinoma cell line 5637 constitutively secretes functional cytokines.
abstract: We have studied cytokine secretion by the human bladder carcinoma cell line 5637 using growth factor-dependent cell line bioassays and specific ELISA. The 5637 cell line-conditioned medium (5637 CM) stimulated proliferation of human growth factor-dependent leukemia cell lines in a dose-dependent fashion. Quantitation by specific ELISA and by bioassays detected high amounts of G-CSF and GM-CSF and smaller quantities of IL-1beta, M-CSF and SCF in 5637 CM; the concentration of IL-3 was below the detection level of the ELISA, if present at all. The G-CSF and GM-CSF activities secreted by 5637 cells could be inhibited specifically by neutralizing anti-G-CSF and anti-GM-CSF antibodies. In conclusion, 5637 bladder carcinoma cells constitutively produce and secrete several functionally active cytokines; 5637 CM is a valuable, reliable and inexpensive source for cytokines, for instance for the culture of growth factor-responsive or -dependent hematopoietic primary cells and cell lines.
authors.affiliation: German Collection of Microorganisms and Cell Cultures, Department of Human and Animal Cell Cultures, Braunschweig, Germany. hqu@gbf-braunschweig.de
authors.forename: H
authors.initials: H
authors.lastname: Quentmeier
authors.forename: M
authors.initials: M
authors.lastname: Zaborski
authors.forename: H G
authors.initials: HG
authors.lastname: Drexler
mesh_terms: D002277:Carcinoma / Q000378:metabolism* / Q000473:pathology; D016207:Cytokines / Q000096:biosynthesis*; D004797:Enzyme-Linked Immunosorbent Assay; D016179:Granulocyte Colony-Stimulating Factor / Q000096:biosynthesis*; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000096:biosynthesis*; D006801:Humans; D014407:Tumor Cells, Cultured; D001749:Urinary Bladder Neoplasms / Q000378:metabolism* / Q000473:pathology
chemical_list: D016207:Cytokines; D016179:Granulocyte Colony-Stimulating Factor; D016178:Granulocyte-Macrophage Colony-Stimulating Factor