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IL-8 production by human polymorphonuclear leukocytes. The chemoattractant formyl-methionyl-leucyl-phenylalanine induces the gene expression and release of IL-8 through a pertussis toxin-sensitive pathway.

M A Cassatella, F Bazzoni, M Ceska, I Ferro, M Baggiolini and G Berton
J Immunol May 15, 1992, 148 (10) 3216-3220;
M A Cassatella
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F Bazzoni
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M Ceska
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I Ferro
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M Baggiolini
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G Berton
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Abstract

IL-8 is a novel chemotactic cytokine, produced by a variety of blood and tissue cells, that has marked activating effects on polymorphonuclear leukocytes (PMN). We report that IL-8 is produced and released by human PMN after stimulation with the chemotactic agonist FMLP. Release of IL-8 in response to FMLP was transient and not influenced by PMN adherence or by the absence of serum in the medium. Maximum yields were usually obtained with 10 nM FMLP within 2 h of stimulation (0.5-3.5 ng/ml/7 x 10(6) cells, range of 17 different donors). IL-8 release was dependent on FMLP-induced de novo protein synthesis because it was inhibited by cycloheximide, was paralleled by enhanced expression of IL-8 mRNA and was potentiated from two- to sixfold after preincubation of PMN with cytochalasin B. The FMLP effect was direct and not dependent on LPS or on contaminating monocytes, which showed only low responsiveness to FMLP. Pretreatment of PMN with pertussis toxin prevented FMLP-dependent IL-8 production, the effect being evident both at the level of mRNA expression and protein secretion. In addition, two other chemoattractans, platelet-activating factor and C5a, were found capable to induce release of IL-8 by PMN. The results of this study suggest that chemotactically stimulated PMN may be able to amplify the recruitment process of PMN to the inflammatory site by releasing IL-8. As a long-lived cytokine, IL-8 could markedly prolong the attractant effect.

  • Copyright © 1992 by American Association of Immunologists
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The Journal of Immunology
Vol. 148, Issue 10
15 May 1992
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IL-8 production by human polymorphonuclear leukocytes. The chemoattractant formyl-methionyl-leucyl-phenylalanine induces the gene expression and release of IL-8 through a pertussis toxin-sensitive pathway.
M A Cassatella, F Bazzoni, M Ceska, I Ferro, M Baggiolini, G Berton
The Journal of Immunology May 15, 1992, 148 (10) 3216-3220;

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IL-8 production by human polymorphonuclear leukocytes. The chemoattractant formyl-methionyl-leucyl-phenylalanine induces the gene expression and release of IL-8 through a pertussis toxin-sensitive pathway.
M A Cassatella, F Bazzoni, M Ceska, I Ferro, M Baggiolini, G Berton
The Journal of Immunology May 15, 1992, 148 (10) 3216-3220;
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Print ISSN 0022-1767        Online ISSN 1550-6606