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. 1998 Nov;95(3):389–394. doi: 10.1046/j.1365-2567.1998.00610.x

Inhibition of the induction of the inducible nitric oxide synthase in murine brain microglial cells by sodium salicylate.

H Kim 1, E Lee 1, T Shin 1, C Chung 1, N An 1
PMCID: PMC1364405  PMID: 9824502

Abstract

The induction of the inducible nitric oxide synthase (iNOS) has been proposed to play a role in a variety of inflammatory diseases. Sodium salicylate (NaSal) is the most commonly used anti-inflammatory agent. We investigated whether NaSal can diminish the induction of iNOS in murine brain microglial cells. In primary cultures, interferon-gamma (IFN-gamma) or lipopolysaccharide (LPS) separately did not stimulate nitric oxide (NO) production, whereas IFN-gamma combined with LPS synergistically induced iNOS. NaSal inhibited both the production of NO and expression of iNOS in microglial cells. Synergy between IFN-gamma and LPS was mainly dependent on tumour necrosis factor-alpha (TNF-alpha) secretion as the increase of the induction of the iNOS by IFN-gamma plus LPS was associated with the increase of TNF-alpha secretion and IFN-gamma plus LPS-induced TNF-alpha secretion by microglial cells was decreased by the treatment with NaSal. These results suggest a possible use of NaSal in managing inflammation of the central nervous system through inhibition of the iNOS induction.

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Selected References

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