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Abstract Title:

Anti-inflammatory and anti-arthritic properties of naringenin via attenuation of NF-κB and activation of the heme oxygenase ﴾HO﴿-1/related factor 2 pathway.

Abstract Source:

Pharmacol Rep. 2017 Oct ;69(5):1021-1029. Epub 2017 Apr 13. PMID: 28943290

Abstract Author(s):

Rong Fan, Tong Pan, An-Li Zhu, Mei-Hong Zhang

Article Affiliation:

Rong Fan

Abstract:

BACKGROUND: Naringenin, a bioflavonoid present in various species of citrus fruit, tomatoes and grapes, has been shown to have various pharmacological effects. We evaluated the anti-arthritic potential of naringenin in formaldehyde-induced inflammation and complete Freund's adjuvant (CFA)-induced arthritis.

METHODS: For both evaluations, rats were divided into groups of six. Different doses of naringenin (5, 10 and 20mg/kg) were used in the models. Body weight and the arthritic index were assessed. Biochemical and antioxidant parameters were determined. Naringenin dose-dependently reduced joint inflammation, decreasing the joint diameter and inflammatory cell infiltration.

RESULTS: Naringenin-treated rats showed an improvement in the synovium redox status (down-regulation of malondialdehyde and glutathione and up-regulation of Catalase (CAT) and superoxide dismutase levels). Naringenin significantly reduced the level of the inflammatory marker TNF-α. Naringenin increased Nrf-2/HO-1 and reduced NF-κB mRNA levels in CFA-treated animal joints. Additionally, naringenin treatment decreased the expression of extracellular matrix degrading enzymes, such as matrix metalloproteinase (MMP-3 and MMP-9), in CFA-induced arthritic rats.

CONCLUSIONS: We conclude that naringenin exerts anti-arthritic effects by downregulating NF-κB and activating the Nrf-2/HO-1 pathway.

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