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The Journal of Immunology, Vol 138, Issue 3 765-774, Copyright © 1987 by American Association of Immunologists
ARTICLES |
B Perussia, M Kobayashi, ME Rossi, I Anegon and G Trinchieri
We report here a comparative study of the effects of several cytokines known to affect myeloid cell differentiation on functional properties of human mature granulocytes. We show that recombinant interferon-gamma (rIFN-gamma), recombinant granulocyte/macrophage-colony stimulating factor (rGM-CSF), recombinant tumor necrosis factor (rTNF), and lymphotoxin (LT) purified to homogeneity are potent stimulators of polymorphonuclear cells (PMN) activity. All cytokines enhance antibody- dependent cell-mediated cytotoxicity (Ab-CMC) mediated by human PMN; however, rGM-CSF, rTNF, and LT have an immediate and short-lived effect on the PMN, whereas the activation by rIFN-gamma requires several hours of induction but can be observed up to 24 to 48 hr of culture. Only the effect of rIFN-gamma is in part dependent on induction of a high- affinity FcR for monomeric IgG on PMN, as suggested by two-color sorting analysis, and on mechanisms that result in prolonged survival of PMN in a functionally active state to mediate oxidative burst, phagocytosis, and bactericidal activity. Greater enhancement of Ab-CMC is obtained by using rIFN-gamma in combination with the other cytokines. Our data indicate that cytokines previously defined on the basis of their cytotoxic effects mediate a wide spectrum of activities on mature myeloid cells and provide evidence for their possible role in vivo, alone or in combination with rIFN-gamma, in modulating functional activities of cells responsible for non-adaptive systems of defense.
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