Publication: Anti-inflammatory properties of fruit juices enriched with pine bark extract in an in vitro model of inflamed human intestinal epithelium: The effect of gastrointestinal digestion
Authors
Frontela Saseta, María del Carmen ; López Nicolás, Rubén ; Martínez Gracia, Carmen ; Ros Berruezo, Gaspar ; González Bermúdez, Carlos Alberto
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Publisher
Elsevier
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DOI
http://dx.doi.org/10.1016/j.fct.2012.11.024
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info:eu-repo/semantics/article
Description
Abstract
Enrichment of fruit juices with pine bark extract (PBE) could be a strategy to compensate for phenolic losses during the gastrointestinal digestion. A coculture system with Caco-2 cells and RAW 264.7 macrophages was established as an in vitro model of inflamed human intestinal epithelium for evaluating the anti-inflammatory capacity of fruit juices enriched with PBE (0.5 g L 1) before and after in vitro digestion. The digestion of both PBE-enriched pineapple and red fruit juice led to significant changes in most of the analysed phenolic compounds. The in vitro inflammatory state showed cell barrier dysfunction and overproduction of IL-8, nitric oxide (NO) and reactive oxygen species (ROS). In the inflamed cells, incubation with nondigested samples reduced (P < 0.05) the production of IL-8 and NO compared with digested samples. ROS production increased in the inflamed cells exposed to digested commercial red fruit juice (86.8 ± 1.3%) compared with fresh juice (77.4 ± 0.8%) and increased in the inflamed cells exposed to digested enriched red fruit juice (82.6 ± 1.6%) compared with the fresh enriched juice (55.8 ± 6%). The anti-inflammatory properties of PBE-enriched fruit juices decreased after digestion; further research on the bioavailability of the assayed compounds is needed to properly assess their usefulness for the treatment of gut inflammation.
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Citation
Food and Chemical Toxicology 53 (2013) 94–99
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