Characterization of Bitter Compounds via Modulation of Proton Secretion in Human Gastric Parietal Cells in Culture

Journal of Agricultural and Food Chemistry
Kathrin Ingrid LisztVeronika Somoza

Abstract

Humans perceive bitterness via around 25 different bitter receptors. Therefore, the identification of antagonists remains a complex challenge. We previously demonstrated several bitter-tasting compounds such as caffeine to induce acid secretion in the stomach and in a human gastric tumor cell line (HGT-1). Here, the results of a fluorescent-based in vitro assay using HGT-1 cells and a human sensory panel testing nine selected potential bitter modulators, with or without the bitter compounds caffeine or theobromine, were compared. Of the bitter-modulating compounds tested, eriodictyol, matairesinol, enterolacton, lariciresinol, and homoeriodictyol reduced the effect of caffeine on proton secretion by -163 ± 14.0, -152 ± 12.4, -74 ± 16.4, -58 ± 7.2, and -44.6 ± 16.5%, respectively, and reduced the bitter intensity of caffeine in the human sensory panel. In contrast, naringenin and 5,7-dihydroxy-4(4-hydroxyphenyl)chroman-2-one neither reduced the caffeine-induced proton secretion in HGT-1 cells nor showed an effect on bitter intensity perceived by the sensory panel. Results for theobromine were not as pronounced as those for caffeine, but followed a similar trend. The results demonstrate that the HGT-1 in vitro assay is a useful t...Continue Reading

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Aug 6, 2015·Journal of Agricultural and Food Chemistry·Kathrin Ingrid LisztVeronika Somoza

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Citations

Mar 3, 2020·Frontiers in Physiology·Patricia WidmayerHeinz Breer
Jun 3, 2021·International Journal of Molecular Sciences·Ann-Katrin HolikVeronika Somoza
Apr 25, 2020·Journal of Medicinal Chemistry·Joseph R FotsingDonald S Karanewsky

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