Antioxidative and anti-inflammatory properties of Citrus sulcata extracts
2011
Wang, Ai-Yih | Zhou, Ming-Yi | Lin, Wen-Chieh
Citrus sulcata was subjected to ultrasound, high-pressure, and Soxhlet extractions. The antioxidant and anti-inflammatory activities of the extracts were evaluated qualitatively and quantitatively. The antioxidant content of the peel extract was twice that of the fruit extract. The quantitative analysis showed that the narirutin and hesperidin contents in the peel extracts were 8.8 and 7.5mg/100g, respectively. These extracts had a total phenolic content of 112.22 ± 2.89 gallic acid equivalent (GAE) mg/100g, a total flavonoid content of 54.09 ± 1.01 rutin equivalent (RE) mg/100g, DPPH radical scavenging activity of 46%, and antioxidant activity of 213.25 ± 2.82μM of Trolox equivalents (TEAC). C. sulcata extracts could prevent hydrogen peroxide (H₂O₂)-induced oxidative stress, reduce expression of the inflammatory markers nuclear Factor kappa B (NFκB) and phosphorylated IκBα (p-IκBα) in A549 human lung carcinoma cells, and inhibit Lipopolysaccharide (LPS)-induced THP-1 monocyte differentiation to an extent of 85%.
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