title: Augmenting effect of methionine-enkephalin on interleukin-6 production by cytokine-stimulated murine macrophages.
abstract: The effects of methionine-enkephalin on the production of interleukin-6 by activated peritoneal murine macrophages were studied. Macrophage were activated with interleukin-1beta or interferon-gamma in the presence or absence of graded concentrations of methionine-enkephalin. Methionine-enkephalin combined with interleukin-1beta or interferon-gamma caused an increase in IL-6 release from cultured macrophages. The opioid receptor antagonist naloxone did not change the stimulatory effect of methionine-enkephalin on IL-6 production by stimulated macrophages. Methionine-enkephalin added to the culture medium of resting macrophages increased IL-6 release from macrophages which were later induced with interleukin-1beta or interferon-gamma. The results of this study suggest that methionine-enkephalin can modulate the proinflammatory cytokine response by controlling, via non-opioid receptor mechanism, the production of IL-6.
authors.affiliation: Department of Clinical Pharmacology, Silesian Medical University, Medyków 18, 40-752 Katowice, Poland.
authors.forename: J
authors.initials: J
authors.lastname: Kowalski
authors.forename: K
authors.initials: K
authors.lastname: Makowiecka
authors.forename: D
authors.initials: D
authors.lastname: Belowski
authors.forename: Z S
authors.initials: ZS
authors.lastname: Herman
mesh_terms: D000818:Animals; D002478:Cells, Cultured; D004744:Enkephalin, Methionine / Q000494:pharmacology*; D004926:Escherichia coli; D007371:Interferon-gamma / Q000494:pharmacology; D007375:Interleukin-1 / Q000494:pharmacology; D015850:Interleukin-6 / Q000096:biosynthesis* / Q000378:metabolism; D008070:Lipopolysaccharides / Q000494:pharmacology; D008262:Macrophage Activation; D017737:Macrophages, Peritoneal / Q000187:drug effects / Q000276:immunology*; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D011994:Recombinant Proteins / Q000494:pharmacology
chemical_list: D007375:Interleukin-1; D015850:Interleukin-6; D008070:Lipopolysaccharides; D011994:Recombinant Proteins; D004744:Enkephalin, Methionine; D007371:Interferon-gamma