Postprandial metabolomics: GC-MS analysis reveals differences in organic acid profiles of impaired fasting glucose individuals in response to highland barley loads

Food & Function
Rui LiuLiyan Liu

Abstract

The aim of our work was to use a targeted GC-MS approach to investigate the difference in organic acid profiles between individuals with impaired fasting glucose (IFG) and healthy controls and then to investigate the alterations in postprandial organic acid profiles after a meal of highland barley (HB) in IFG individuals. Firstly, 30 IFG and 30 healthy individuals were recruited and 26 organic acids were detected to characterize the organic acid profiles in the fasting serum metabolome. Secondly, 15 participants of the IFG group received three different loads: glucose (GL), white rice (WR) and HB. Serum was collected at time zero, 30, 60, 90 and 120 min after the test load. The results showed fasting organic acid profiles were different between the IFG group and the controls. For the postprandial changes in organic acids after the three test loads, six organic acids related to the tricarboxylic acid (TCA) cycle, namely citrate, cis-aconitic acid, fumarate, succinate, pyruvate and malate, had a significant test load effect (p < 0.01) and a significant time × test load interaction effect (p < 0.01). The AUC0-120 min values for citrate, fumarate and malate after WR and HB loads were significantly lower (p < 0.05) compared to the G...Continue Reading

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Citations

Mar 3, 2021·Food Research International·Mohammed ObadiBin Xu

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