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Issue title: The Proceedings of the 3rd International Conference on Food Factors (ICoFF 03)
Article type: Research Article
Authors: Jung, Won-Jin | Sung, Mi-Kyung
Affiliations: Department of Food and Nutrition, Sookmyung Women's University, 53-12 Chungpa-dong 2-ka, Yongsan-ku , Seoul, 140-742 Korea. Tel./Fax: +82 2 710 9395; E-mail: mksung@sookmyung.ac.kr
Note: [] Corresponding author
Abstract: Oxidative stresses are involoved in the process of chronic inflammatory diseases. The objective of this study was to evaluate and compare the anti-inflammatory activity of major dietary antioxidants. Murine RAW264.7 macrophages (4 × 10^6 cells) were incubated in DMEM containing 10% FBS supplemented with 5 to 20 μM of α-tocopherol, β-carotene or quercetin for 24 hrs, and then treated with LPS for 16hrs. The medium was collected to measure TNF-α, IL-6, PGE_2 and nitrite. Expressions of cyclooxygenase-2(COX-2) and inducible nitric oxide synthase(iNOS) were determined using the harvested cells. Results indicate that TNF-α and IL-6 accumulations were significantly reduced by 5 to 20 μM quercetin treatment, and 20 μM of α-tocopherol treatment. Nitrite release was significantly reduced by 5 μM quercetin treatment. However, PGE_2accumulation was not affected by any of the antioxidants used. Expressions of COX-2 and iNOS were effectively reduced by 5 μM quercetin treatment. These findings indicate that dietary antioxidants possess significant anti-inflammatory activities, and quercetin is the most potent antioxidant.
Keywords: antioxidants, inflammation, macrophages, inflammatory cytokines, COX-2, iNOS
Journal: BioFactors, vol. 21, no. 1-4, pp. 113-117, 2004
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