title: Activation of C3H/HeJ macrophage tumoricidal activity and cytokine release by R-chemotype lipopolysaccharide preparations. Differential effects of IFN-gamma.
abstract: We have investigated the relative immunostimulatory activities of S-chemotype LPS and R-chemotype LPS preparations on C3H/HeJ peritoneal macrophages in vitro. As assessed by either secretion of TNF-alpha or IL-1, some of the R-chemotype LPS manifest significant activity on these normally LPS-unresponsive cells. The expression of IL-1 activity by R-LPS-stimulated C3H/HeJ macrophages was unaffected by IFN-gamma; however, this cytokine significantly enhanced TNF-alpha production by the same cells. The R-chemotype LPS preparations alone were not able to activate C3H/HeJ macrophages to become tumoricidal but activity could readily be demonstrated in the presence of IFN-gamma. Of potential importance is the observation that the profile of relative activity of the various R-chemotype LPS preparations for macrophage activation does not parallel that previously obtained by us for the C3H/HeJ B-lymphocyte activation.
authors.affiliation: Department of Microbiology, Molecular Genetics and Immunology, University of Kansas Medical Center, Kansas City 66103.
authors.forename: L M
authors.initials: LM
authors.lastname: Flebbe
authors.forename: S K
authors.initials: SK
authors.lastname: Chapes
authors.forename: D C
authors.initials: DC
authors.lastname: Morrison
mesh_terms: D000818:Animals; D003602:Cytotoxicity, Immunologic; D006358:Hot Temperature; D066298:In Vitro Techniques; D007371:Interferon-gamma / Q000494:pharmacology; D007375:Interleukin-1 / Q000096:biosynthesis; D008070:Lipopolysaccharides / Q000494:pharmacology*; D008262:Macrophage Activation; D008264:Macrophages / Q000276:immunology*; D051379:Mice; D008809:Mice, Inbred C3H / Q000276:immunology*; D010529:Peritoneal Cavity / Q000166:cytology; D011994:Recombinant Proteins; D014407:Tumor Cells, Cultured / Q000276:immunology; D014409:Tumor Necrosis Factor-alpha / Q000096:biosynthesis
chemical_list: D007375:Interleukin-1; D008070:Lipopolysaccharides; D011994:Recombinant Proteins; D014409:Tumor Necrosis Factor-alpha; D007371:Interferon-gamma