Absorption, Metabolism, and Excretion by Freely Moving Rats of 3,4-DHPEA-EDA and Related Polyphenols from Olive Fruits (Olea europaea)

Journal of Nutrition and Metabolism
Shunsuke KanoHirotoshi Tamura

Abstract

Absorption, metabolism, and excretion of 3,4-DHPEA-EDA, oleuropein, and hydroxytyrosol isolated from olive fruits were newly evaluated after oral and intravenous administration in freely moving rats cannulated in the portal vein, jugular vein, and bile duct. Orally administered 3,4-DHPEA-EDA, an important bioactive compound in olive pomace, was readily absorbed and metabolized to hydroxytyrosol, homovanillic acid, and homovanillyl alcohol, as shown by dose-normalized 4 h area under the curve (AUC0→4 h/Dose) values of 27.7, 4.5, and 4.2 μM·min·kg/μmol, respectively, in portal plasma after oral administration. The parent compound 3,4-DHPEA-EDA was not observed in the portal plasma, urine, and bile after oral and intravenous administration. Additionally, hydroxytyrosol, homovanillic acid, and homovanillyl alcohol in the portal plasma after oral administration of hydroxytyrosol showed 51.1, 22.8, and 7.1 μM·min·kg/μmol AUC0→4 h/Dose, respectively. When oleuropein, a polar glucoside, was injected orally, oleuropein in the portal plasma showed 0.9 μM·min·kg/μmol AUC0→4 h/Dose. However, homovanillic acid was detected from oleuropein in only a small amount in the portal plasma. Moreover, the bioavailability of hydroxytyrosol and oleuro...Continue Reading

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Citations

May 10, 2017·International Journal of Molecular Sciences·Luigi GentileGanapathy Sivakumar
Dec 6, 2017·Journal of Clinical Biochemistry and Nutrition·Yoko FujiwaraYoshinori Aoki
Apr 29, 2021·Journal of Agricultural and Food Chemistry·Sebastià GalmésAndreu Palou
Jun 3, 2021·Pharmaceutics·Anallely López-YerenaElvira Escribano-Ferrer
Oct 31, 2021·Journal of Food Biochemistry·Masood Sadiq ButtMuhammad Rizwan

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