Absorption and Elimination of Oat Avenanthramides in Humans after Acute Consumption of Oat Cookies.

ABSTRACT: Background:Avenanthramides (AVA) are a group of diphenolic acids found only in oats that have anti-inflammatory and antioxidant effects. Absorption of AVAs in humans after oral consumption of natural oat flour is unknown. Objective:To examine the appearance of AVAs in plasma after oral ingestion of oat cookies and estimate key pharmacokinetic parameters. Methods:Male and female nonobese participants (n = 16) consumed three cookies made with oat flour containing high (229.6?mg/kg, H-AVA) or low (32.7?mg/kg, L-AVA) amounts of AVAs, including AVA-A, AVA-B, and AVA-C. Blood samples were collected at 0, 0.5, 1, 2, 3, 5, and 10?h after ingestion. Plasma total (conjugated and free) AVA concentrations were quantified using UPLC-MS, and pharmacokinetic parameters for each AVA were estimated. Results:AVAs reached peak concentrations in plasma between 2 and 3?h for the H-AVA group and between 1 and 2?h for the L-AVA group. Maximal plasma concentrations for AVAs were higher in the H-AVA than in the L-AVA group. AVA-B demonstrated a longer half-life and slower elimination rate than AVA-A and AVA-C. Conclusions:AVAs found naturally in oats are absorbed in the plasma after oral administration in humans. AVA-B has the slowest elimination rate and the longest half-life compared to AVA-A and AVA-C, while AVA-C demonstrated the lowest plasma concentrations. This study is registered with ClinicalTrials.gov identifier NCT02415374.

SUBMITTER: Zhang T 

PROVIDER: S-EPMC5752969 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature