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Effect of in vitro digested cod liver oil of different quality on oxidative, proteomic and inflammatory responses in the yeast Saccharomyces cerevisiae and human monocyte‐derived dendritic cells
Author(s) -
Larsson Karin,
Istenič Katja,
Wulff Tune,
Jónsdóttir Rósa,
Kristinsson Hordur,
Freysdottir Jona,
Undeland Ingrid,
Jamnik Polona
Publication year - 2015
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.7046
Subject(s) - saccharomyces cerevisiae , in vitro , yeast , monocyte , oxidative phosphorylation , biochemistry , biology , chemistry , food science , microbiology and biotechnology , immunology
BACKGROUND Upon oxidation of the polyunsaturated fatty acids in fish oil, either before ingestion or, as recently shown, during the gastro‐intestinal passage, a cascade of potentially cytotoxic peroxidation products, such as malondialdehyde and 4‐hydroxy‐2‐hexenal, can form. In this study, we digested fresh and oxidised cod liver oils in vitro , monitored the levels of lipid peroxidation products and evaluated oxidative, proteomic and inflammatory responses to the two types of digests in the yeast Saccharomyces cerevisiae and human monocyte‐derived dendritic cells. RESULTS Digests of cod liver oil with 22–53 µmol L −1 malondialdehyde and 0.26–3.7 µmol L −1 4‐hydroxy‐2‐hexenal increased intracellular oxidation and cell energy metabolic activity compared to a digested blank in yeast cells and the influence of digests on mitochondrial protein expression was more pronounced for oxidised cod liver oil than fresh cod liver oil. The four differentially expressed and identified proteins were related to energy metabolism and oxidative stress response. Maturation of dendritic cells was affected in the presence of digested fresh cod liver oil compared to the digested blank, measured as lower CD86 expression. The ratio of secreted cytokines, IL‐12p40/IL‐10, suggested a pro‐inflammatory effect of the digested oils in relation to the blank (1.47–1.67 vs. 1.07). CONCLUSION Gastro‐intestinal digestion of cod liver oil increases the amount of oxidation products and resulting digests affect oxidation in yeast and immunomodulation of dendritic cells. © 2014 Society of Chemical Industry