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Wheat aleurone polyphenols increase plasma eicosapentaenoic acid in rats

Abstract : Methods: These studies were designed to assess whether wheat polyphenols (mainly ferulic acid [FA]) increased the very-long-chain omega-3 fatty acids (VLC n-3) [eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA)] in rats. Wheat aleurone (WA) was used as a dietary source of wheat polyphenols. Two experiments were performed; in the first one, the rats were fed WA or control pellets (CP) in presence of linseed oil (LO) to provide alpha-linolenic acid (ALA), the precursor of VLC n-3. In the second one, the rats were fed WA or CP in presence of control oil (CO) without ALA. The concentrations of phenolic acid metabolites in urine were also investigated. Results: The urinary concentration of conjugated FA increased with WA ingestion (p<0.05). Plasma EPA increased by 25% (p<0.05) with WA in the CO group but not in the LO group. In contrast, there was no effect of WA on plasma DHA and omega-6 fatty acids (n-6). Finally, both n-3 and n-6 in the liver remained unchanged by the WA. Conclusion: These results suggest that WA consumption has a significant effect on EPA in plasma without affecting n-6. Subsequent studies are required to examine whether these effects may explain partly the health benefits associated with whole wheat consumption.
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https://hal.univ-grenoble-alpes.fr/hal-01928652
Contributeur : Sarah Hamant <>
Soumis le : mardi 20 novembre 2018 - 16:31:33
Dernière modification le : jeudi 27 août 2020 - 11:36:04

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Fayçal Ounnas, Florence Privé, Patricia Salen, Florence Hazane-Puch, François Laporte, et al.. Wheat aleurone polyphenols increase plasma eicosapentaenoic acid in rats. Food and Nutrition Research, Swedish Nutrition Foundation, 2014, 58 (1), pp.24604. ⟨10.3402/fnr.v58.24604⟩. ⟨hal-01928652⟩

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