alexa [6]-Gingerol inhibits nitric oxide synthesis in activated J774.1 mouse macrophages and prevents peroxynitrite-induced oxidation and nitration reactions.
Nutrition

Nutrition

Journal of Nutrition & Food Sciences

Author(s): Ippoushi K, Azuma K, Ito H, Horie H, Higashio H

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Abstract Reactive nitrogen species (RNS), such as nitric oxide (NO) and its derivatives, e.g. peroxynitrite (ONOO-), have been proposed as being able to influence signal transduction and cause DNA damage, contributing to carcinogenic processes. In this study, the effect of [6]-gingerol, a pungent phenolic compound present in ginger (Zingiber officinale Roscoe), on NO synthesis in lipopolysaccharide (LPS)-activated J774.1 macrophages was tested, and the protective ability of this compound against peroxynitrite-mediated oxidation and nitration reactions were evaluated. [6]-Gingerol exhibited dose-dependent inhibition of NO production and significant reduction of inducible NO synthase (iNOS) in LPS-stimulated J774.1 cells. Moreover, [6]-gingerol effectively suppressed peroxynitrite-induced oxidation of dichlorodihydrofluorescein, oxidative single strand breaks in supercoiled pTZ 18U plasmid DNA, and formation of 3-nitrotyrosine in bovine serum albumin (BSA) and J774.1 cells. Our results indicate that [6]-gingerol is a potent inhibitor of NO synthesis and also an effective protector against peroxynitrite-mediated damage.
This article was published in Life Sci and referenced in Journal of Nutrition & Food Sciences

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