Modulation of human monocyte superoxide production by recombinant interleukin-3.
We have examined the generation of superoxide by human monocytes isolated from peripheral blood cultured in the presence of recombinant human interleukin-3 in comparison to tumor necrosis factor-alpha and interferon-gamma. The rate of superoxide production of unstimulated and stimulated monocytes [by formyl-methionyl-leucyl-phenylalanine (0.1 microM) and by phorbol-myristate-acetate (2 ng/ml and 200 ng/ml)] decreased during the culture period in the absence of interleukin-3, whereas cells treated with interleukin-3 maintained or surpassed their initial superoxide-producing capacity. An increase of phorbol-myristate-acetate- and formyl-methionyl-leucyl-phenylalanine-stimulated superoxide production of monocytes cultured with interleukin-3 compared to control cells was detected first after 24 h of monocyte culture. It was maximal after 96 h of monocyte culture. At this time the stimulated superoxide production of monocytes cultured in the presence of interleukin-3 surpassed that of interferon-gamma and tumor necrosis factor-alpha treated cells. Suboptimal concentrations of the stimulus phorbol-myristate-acetate (2 ng/ml) resulted in higher priming than 200 ng/ml phorbol-myristate-acetate. A dose dependence of the effect of interleukin-3 on the superoxide production was observed. Our results demonstrate that interleukin-3 primes cultured human peripheral blood monocytes for enhanced stimulated respiratory burst activity to a higher extent than interferon-gamma and tumor necrosis factor-alpha.
Jendrossek
V
V
Universitätskinderklinik Göttingen, Germany.
Buth
S
S
Stetter
C
C
Gahr
M
M
D002448:Cell Adhesion / Q000187:drug effects; D002478:Cells, Cultured; D006801:Humans; D007371:Interferon-gamma / Q000494:pharmacology; D007377:Interleukin-3 / Q000494:pharmacology*; D009000:Monocytes / Q000187:drug effects / Q000378:metabolism*; D009240:N-Formylmethionine Leucyl-Phenylalanine / Q000494:pharmacology; D011994:Recombinant Proteins / Q000494:pharmacology; D016897:Respiratory Burst / Q000187:drug effects*; D013481:Superoxides / Q000097:blood*; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology
D007377:Interleukin-3; D011994:Recombinant Proteins; D014409:Tumor Necrosis Factor-alpha; D013481:Superoxides; D009240:N-Formylmethionine Leucyl-Phenylalanine; D007371:Interferon-gamma; D013755:Tetradecanoylphorbol Acetate