Murine macrophage activation by staphylococcal exotoxins.
We investigated the ability of staphylococcal enterotoxins A and B, exfoliative toxins A and B, and toxic shock syndrome toxin 1 to activate macrophages. All of the toxins tested had the potential to stimulate tumoricidal activity in peritoneal macrophages from lipopolysaccharide-responsive C3HeB/FeJ mice. In contrast, none of the toxins activated cytotoxicity in lipopolysaccharide-unresponsive macrophages from C3H/HeJ mice. We also studied toxin stimulation of monokine secretion. Staphylococcal enterotoxin A, toxic shock syndrome toxin 1, and both exfoliative toxins triggered C3HeB/FeJ macrophages to secrete tumor necrosis factor alpha, but enterotoxin B induced only marginal amounts of tumor necrosis factor. All of the toxins used stimulated interleukin-6 production by macrophages from both strains of mice. Nitric oxide is produced in response to the exfoliative toxins only by the lipopolysaccharide-responsive macrophages. These results suggest that macrophages respond differently to several staphylococcal exotoxins.
Fleming
S D
SD
Division of Biology, Kansas State University, Manhattan 66506.
Iandolo
J J
JJ
Chapes
S K
SK
D000818:Animals; D001427:Bacterial Toxins / Q000276:immunology*; D003602:Cytotoxicity, Immunologic; D004768:Enterotoxins / Q000276:immunology; D005083:Exfoliatins / Q000276:immunology; D005098:Exotoxins / Q000276:immunology*; D007371:Interferon-gamma / Q000494:pharmacology; D015850:Interleukin-6 / Q000378:metabolism; D008262:Macrophage Activation; D008264:Macrophages / Q000276:immunology*; D051379:Mice; D008809:Mice, Inbred C3H; D009569:Nitric Oxide / Q000378:metabolism; D009573:Nitrites / Q000378:metabolism; D011994:Recombinant Proteins; D013211:Staphylococcus aureus / Q000276:immunology* / Q000472:pathogenicity; D018089:Superantigens; D013997:Time Factors; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism
D001427:Bacterial Toxins; D004768:Enterotoxins; D005083:Exfoliatins; D005098:Exotoxins; D015850:Interleukin-6; D009573:Nitrites; D011994:Recombinant Proteins; D018089:Superantigens; D014409:Tumor Necrosis Factor-alpha; C030107:enterotoxin F, Staphylococcal; D009569:Nitric Oxide; C026066:enterotoxin A, Staphylococcal; C031818:enterotoxin B, staphylococcal; D007371:Interferon-gamma