1. Antioxidant and anti-inflammatory in vitro activities of phenolic compounds from tropical highland blackberry (Rubus adenotrichos).
- Author
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Azofeifa G, Quesada S, Boudard F, Morena M, Cristol JP, Pérez AM, Vaillant F, and Michel A
- Subjects
- Animals, Anti-Inflammatory Agents, Non-Steroidal analysis, Anti-Inflammatory Agents, Non-Steroidal isolation & purification, Antioxidants analysis, Antioxidants isolation & purification, Cell Line, Costa Rica, Fruit growth & development, Humans, Lipid Peroxidation, Liver metabolism, Mice, Monocytes metabolism, Phenols analysis, Phenols isolation & purification, Plant Extracts isolation & purification, Rats, Rats, Sprague-Dawley, Rosaceae growth & development, Tropical Climate, Anti-Inflammatory Agents, Non-Steroidal chemistry, Antioxidants chemistry, Dietary Supplements, Fruit chemistry, Phenols chemistry, Plant Extracts chemistry, Rosaceae chemistry
- Abstract
This study evaluates the antioxidant and anti-inflammatory activities in a polyphenol extract from blackberries. The antioxidant activity measured via oxygen radical absorbance capacity (ORAC) was higher for the blackberry extract (4339 ± 144 μM TE/g) than for quercetin and ellagic acid. The blackberry phenolic compounds protected liposomes and liver homogenates against lipid peroxidation; in both models, the antioxidant activity (IC₅₀ = 7.0 ± 0.5 and 20.3 ± 4.2 μg/mL, respectively) was greater than that found with Trolox. The extract inhibited superoxide production by NADPH oxidase in THP-1 cells and nitrite production in J774A.1 cells stimulated with LPS+IFNγ, with nitrite production decreasing after 4 h of incubation with the extract, mainly through a strong scavenging activity. However, 24 h of treatment reduced the amount of nitrites (IC₅₀ = 45.6 ± 1.2 μg/mL) because of a down-regulation of iNOS protein expression, as demonstrated by Western blotting. The inhibitory activities found in blackberry phenols suggest a potential beneficial effect against oxidative stress and inflammatory processes.
- Published
- 2013
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