title: A macrophage-derived factor required by plasmacytomas for survival and proliferation in vitro.
abstract: Plasmacytoma (PCT) cell lines dependent for proliferation and survival on a factor elaborated by the murine macrophage cell line, P388D1, were established in vitro. Adherent peritoneal cells induced by pristane produced 50-fold greater amounts of this activity in vitro than did resident cells. The molecules responsible for plasmacytoma growth were distinct from a number of characterized factors including interleukin-1, -2, and -3, macrophage colony-stimulating factor, B-cell stimulatory factor-1, B-cell growth factor II, epidermal growth factor, transforming growth factor-beta, and gamma- and beta-interferon, none of which were able to support the growth of the factor-dependent PCT cell lines. These results suggest that PCT growth factor may be a novel factor that has not been previously characterized and, further, that its production is associated with the pristane-induced, chronic peritoneal inflammatory response that precedes plasmacytoma formation.
mesh_terms: D000818:Animals; D002455:Cell Division / Q000187:drug effects; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D006133:Growth Substances / Q000302:isolation & purification* / Q000494:pharmacology / Q000502:physiology; D006801:Humans; D066298:In Vitro Techniques; D008264:Macrophages / Q000502:physiology*; D051379:Mice; D010954:Plasmacytoma / Q000503:physiopathology*
chemical_list: D006133:Growth Substances