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. 1989 Oct;68(2):240–246.

Effect of sodium fluoride on the generation of lipoxygenase products from human polymorphonuclear granulocytes, mononuclear cells and platelets--indication for the involvement of G proteins.

C Brom 1, M Köller 1, J Brom 1, W König 1
PMCID: PMC1385424  PMID: 2553586

Abstract

Incubation of human polymorphonuclear granulocytes, monocytes and platelets with sodium fluoride (NaF) results in a time- and dose-dependent generation of leukotrienes and 12-HETE, respectively. This release was not influenced by pretreatment with pertussis toxin or cholera toxin. The mediators are detectable after a lag phase of about 5-10 min. Inactivation of LTB4 by the neutrophils via omega-oxidation into 20-hydroxy-LTB4 and 20-carboxy-LTB4 is inhibited by NaF. In combination with other cell stimuli, NaF showed modulatory effects, such as an enhanced formation of the leukotrienes when FMLP, opsonized zymosan, PMA, and arachidonic acid were applied as stimuli. Prestimulation of cells with NaF causes an increased [3H]guanylylimidodiphosphate binding to isolated membrane preparations, indicating an enhanced exchange rate for GDP to GTP. Our data demonstrate that a direct activation of GTP-binding proteins results in the generation of the inflammatory mediators and provides evidence for the involvement of the signal-transduction pathway.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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