title: Recombinant tumor necrosis factor: species specificity for a variety of human and murine transformed cell lines.
abstract: Tumor necrosis factor (TNF) exhibits cytotoxic or cytostatic activity on a wide range of animal and human transformed cell lines. Using pure, recombinant human and mouse TNF, we examined the degree of species specificity of the in vitro TNF activity on a variety of human and murine transformed cell lines. This species specificity was studied for the TNF activity alone or in synergism with IFN-gamma. Recombinant human and mouse TNF behave remarkably similarly regarding the in vitro cytolytic/cytostatic activity. However, a certain degree of species-specific preference could be revealed as human cell lines needed a higher concentration of recombinant mouse TNF than of recombinant human TNF to attain a similar effect, while on mouse cells the reverse was true. Also, synergism with IFN-gamma seemed more effective when the target cell was treated with homologous TNF.
mesh_terms: D000818:Animals; D002453:Cell Cycle / Q000187:drug effects; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D004357:Drug Synergism; D006023:Glycoproteins / Q000494:pharmacology*; D006801:Humans; D066298:In Vitro Techniques; D007371:Interferon-gamma / Q000494:pharmacology; D051379:Mice; D011994:Recombinant Proteins / Q000494:pharmacology; D013045:Species Specificity; D014409:Tumor Necrosis Factor-alpha
chemical_list: D006023:Glycoproteins; D011994:Recombinant Proteins; D014409:Tumor Necrosis Factor-alpha; D007371:Interferon-gamma