title: Entamoeba histolytica extract and interferon-gamma activation of macrophage-mediated amoebicidal function.
abstract: The effect of recombinant murine interferon-gamma (IFN-gamma) and E. histolytica extract (E.h.E.) on macrophage (M phi) activation for amoebicidal activity was examined. Peritoneal macrophages were harvested from C57BL/6 and A/J mice and preincubated with IFN-gamma and/or E.h.E. It was found that amoebicidal activity could be induced in both C57BL/6 and A/J-derived macrophages by pretreatment with IFN-gamma and E.h.E. Pretreatment of the M phi with E. histolytica extract or IFN-gamma alone did not result in the activation of significant cytotoxic activity against E. histolytica trophozoites. In the presence of IFN-gamma, E.h.E. had a dose-dependent effect on the activation of M phi amoebicidal function.
authors.affiliation: Montreal General Hospital Research Institute, Quebec, Canada.
authors.forename: E
authors.initials: E
authors.lastname: Ghadirian
authors.forename: M
authors.initials: M
authors.lastname: Denis
mesh_terms: D000276:Adjuvants, Immunologic / Q000494:pharmacology; D000818:Animals; D003602:Cytotoxicity, Immunologic / Q000187:drug effects; D004306:Dose-Response Relationship, Immunologic; D004357:Drug Synergism; D004748:Entamoeba histolytica / Q000737:chemistry / Q000276:immunology*; D007111:Immunity, Cellular / Q000187:drug effects; D007371:Interferon-gamma / Q000494:pharmacology*; D008262:Macrophage Activation / Q000187:drug effects*; D008264:Macrophages / Q000276:immunology; D008297:Male; D051379:Mice; D008805:Mice, Inbred A; D008810:Mice, Inbred C57BL; D014409:Tumor Necrosis Factor-alpha / Q000276:immunology
chemical_list: D000276:Adjuvants, Immunologic; D014409:Tumor Necrosis Factor-alpha; D007371:Interferon-gamma