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|Title:||β-Phenylethyl and 8-methylsulphinyloctyl isothiocyanates, constituents of watercress, suppress LPS induced production of nitric oxide and prostaglandin E2 in RAW 264.7 macrophages||Authors:||Rose, P.
Nuclear factor κB
Raw 264.7 cells
|Issue Date:||2005||Citation:||Rose, P., Whiteman, M., Yen, K.W., Choon, N.O. (2005). β-Phenylethyl and 8-methylsulphinyloctyl isothiocyanates, constituents of watercress, suppress LPS induced production of nitric oxide and prostaglandin E2 in RAW 264.7 macrophages. Nitric Oxide - Biology and Chemistry 12 (4) : 237-243. ScholarBank@NUS Repository. https://doi.org/10.1016/j.niox.2005.03.001||Abstract:||β-Phenylethyl (PEITC) and 8-methylsulphinyloctyl isothiocyanates (MSO) represent two phytochemical constituents present in watercress Rorripa nasturtium aquaticum, with known chemopreventative properties. In the present investigation, we examined whether PEITC and MSO could modulate the inflammatory response of Raw 264.7 macrophages to bacterial lipopolysaccharide (LPS) by assessment of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) expression. Overproduction of both nitric oxide (NO) and prostaglandins (PGE) has been associated with numerous pathological conditions including chronic inflammation and cancer. Our results demonstrate that LPS (1 μg/ml ∼ 24 h) induced nitrite and prostaglandin E2 (PGE-2) synthesis in Raw 264.7 cells was attenuated by both isothiocyanates (ITCs) in a concentration-dependent manner. Both PEITC and MSO decreased (iNOS) and (COX-2) protein expression levels leading to reduced secretion of both pro-inflammatory mediators. Interestingly, the reduction in both iNOS and COX-2 expression were associated with the inactivation of nuclear factor-κB and stabilization of IκBα. Taken together our data gives further insight into the possible chemopreventative properties of two dietary derived isothiocyanates from watercress. © 2005 Published by Elsevier Inc.||Source Title:||Nitric Oxide - Biology and Chemistry||URI:||http://scholarbank.nus.edu.sg/handle/10635/38292||ISSN:||10898603||DOI:||10.1016/j.niox.2005.03.001|
|Appears in Collections:||Staff Publications|
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