期刊
JOURNAL OF NATURAL PRODUCTS
卷 76, 期 9, 页码 1586-1591出版社
AMER CHEMICAL SOC
DOI: 10.1021/np400242e
关键词
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资金
- European Programme Operational Programme Education for Competitiveness [CZ.1.07/2.3.00/30.0014]
- Internal Grant Agency of the University of Veterinary and Pharmaceutical Sciences Brno (IGA VFU) [83/2012/FaF]
In this study, four prenylated and geranylated flavonoids, cudraflavone B (1), pomiferin (2), osajin (3), and diplacone (4), were tested for their antioxidant and anti-inflammatory effects and to identify any potential relationships between chemical structure and antioxidant or anti-inflammatory properties. The selected flavonoids were examined in cell-free models to prove their ability to scavenge superoxide radicals, hydrogen peroxide, and hypochlorous acid. Further, the ability of the flavonoids to influence the formation of reactive oxygen species in the murine macrophage cell line J774.A1 was tested in the presence and absence of lipopolysaccharide (LPS). The ability of flavonoids to inhibit LPS-induced I kappa B-alpha degradation and COX-2 expression was used as a model for the inflammatory response. The present results indicated that the antioxidant activity was dependent on the chemical structure, where the catechol moiety is especially crucial for this effect. The most potent antioxidant activities in cell-free models were observed for diplacone (4), whereas cudraflavone B (1) and osajin (3) showed a pro-oxidant effect in J774.A1 cells. All flavonoids tested were able to inhibit I kappa B-alpha degradation, but only diplacone (4) also down-regulated COX-2 expression.
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