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Abstract Title:

Quercetin Attenuates TNF-Induced Inflammation in Hepatic Cells by Inhibiting the NF-κB Pathway.

Abstract Source:

Nutr Cancer. 2012 Mar 27. Epub 2012 Mar 27. PMID: 22452660

Abstract Author(s):

Ana Belén Granado-Serrano, María Ángeles Martín, Laura Bravo, Luis Goya, Sonia Ramos

Article Affiliation:

a Department of Metabolism and Nutrition , Institute of Food Science, Technology and Nutrition-ICTAN (former Instituto del Frío), Consejo Superior de Investigaciones Científicas, Ciudad Universitaria , Madrid , Spain.

Abstract:

The dietary flavonoid quercetin is an antioxidant that possesses antiinflammatory and anticarcinogenic properties and may modulate signaling pathways. Inflammation is considered to play a pivotal role in carcinogenesis by triggering activation of transcription factors such as nuclear factor kappa B (NF-κB), functionally dependent on cellular redox status. This study aims to investigate the antiinflammatory effect of quercetin and its role on the NF-κB pathway, and cyclooxygenase-2 (COX-2) and mitogen-activated protein kinases modulation in a human hepatoma cell line (HepG2). Quercetin alone did not modify any of the parameters analyzed but protected cells against activation of the NF-κB route induced by tumor necrosis factor-α. This inhibitory effect of quercetin was mediated, at least in part, by extracellular regulated kinase, c-jun amino-terminal kinase, and reactive oxygen species, and it was accompanied by reduced COX-2 levels. These observations suggest that quercetin may contribute as an antiinflammatory agent in the liver and provide evidences about its role in the prevention of diseases associated with inflammation, including cancer.

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Sayer Ji
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