Isatins inhibit cyclooxygenase-2 and inducible nitric oxide synthase in a mouse macrophage cell line

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Isatin is a versatile compound with a diversity of effects. We designed to investigate the inhibitory effect of isatin derivatives on lipopolysaccharide/interferon-γ-induced expression of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) proteins, production of prostaglandin E2 (PGE2), nitric oxide (NO), tumor necrosis factor (TNF-α), and their capacity to scavenge NO. Isatins inhibit TNF-α production and iNOS and COX-2 protein expression resulting on reduced levels of NO and PGE2. Our results indicate isatin and it derivatives as inhibitors of iNOS and COX-2 enzymes, which might be used as anti-inflammatory and antitumoral agents.

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