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Mueller AU, Andersen G, Richter P, Somoza V. Activation of the TRPML1 Ion Channel Induces Proton Secretion in the Human Gastric Parietal Cell Line HGT-1. Int J Mol Sci 2024; 25:8829. [PMID: 39201515 PMCID: PMC11354443 DOI: 10.3390/ijms25168829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2024] [Revised: 08/02/2024] [Accepted: 08/10/2024] [Indexed: 09/02/2024] Open
Abstract
The lysosomal Ca2+ channel TRPML1 was found to be responsible for gastric acid secretion in murine gastric parietal cells by inducing the trafficking of H+/K+-ATPase containing tubulovesicles to the apical membrane. Therefore, we hypothesized a similar role of TRPML1 in regulating proton secretion in the immortalized human parietal cell line HGT-1. The primary focus was to investigate the involvement of TRPML1 in proton secretion using the known synthetic agonists ML-SA1 and ML-SA5 and the antagonist ML-SI3 and, furthermore, to identify food-derived compounds that target the channel. Proton secretion stimulated by ML-SA1 was reduced by 122.2 ± 22.7% by the antagonist ML-SI3. The steroid hormone 17β-estradiol, present in animal-derived foods, diminished the proton secretory effect of ML-SA1 by 63.4 ± 14.5%. We also demonstrated a reduction in the proton secretory effects of ML-SA1 and ML-SA5 on TRPML1 knock-down cells. The food-derived compounds sulforaphane and trehalose promoted proton secretion in HGT-1 cells but may act independently of TRPML1. Also, histamine- and caffeine-induced proton secretion were affected by neither the TRPML1 antagonist ML-SI3 nor the TRPML1 knock-down. In summary, the results obtained suggest that the activation of TRPML1 promotes proton secretion in HGT-1 cells, but the channel may not participate in canonical signaling pathways.
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Affiliation(s)
- Alina Ulrike Mueller
- TUM School of Life Sciences Weihenstephan, Technical University of Munich, Alte Akademie 8, 85354 Freising, Germany
- Leibniz Institute for Food Systems Biology at the Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany
| | - Gaby Andersen
- Leibniz Institute for Food Systems Biology at the Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany
| | - Phil Richter
- TUM School of Life Sciences Weihenstephan, Technical University of Munich, Alte Akademie 8, 85354 Freising, Germany
- Leibniz Institute for Food Systems Biology at the Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany
| | - Veronika Somoza
- Leibniz Institute for Food Systems Biology at the Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany
- Chair of Nutritional Systems Biology, TUM School of Life Sciences, Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany
- Department of Physiological Chemistry, Faculty of Chemistry, University of Vienna, Josef-Holaubek-Platz 2 (UZA II), 1090 Wien, Austria
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Li P, Song W, Wang Y, Li X, Wu S, Li B, Zhang C. Effects of Heterologous Expression of Genes Related L-Malic acid Metabolism in Saccharomyces uvarum on Flavor Substances Production in Wine. Foods 2024; 13:2038. [PMID: 38998544 PMCID: PMC11241653 DOI: 10.3390/foods13132038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2024] [Revised: 06/16/2024] [Accepted: 06/25/2024] [Indexed: 07/14/2024] Open
Abstract
During malolactic fermentation (MLF) of vinification, the harsh L-malic acid undergoes transformation into the milder L-lactic acid, and via decarboxylation reactions it is catalyzed by malolactic enzymes in LAB. The use of bacterial malolactic starter cultures, which usually present challenges in the industry as the suboptimal conditions after alcoholic fermentation (AF), including nutrient limitations, low temperatures, acidic pH levels, elevated alcohol, and sulfur dioxide concentrations after AF, lead to "stuck" or "sluggish" MLF and spoilage of wines. Saccharomyces uvarum has interesting oenological properties and provides a stronger aromatic intensity than Saccharomyces cerevisiae in AF. In the study, the biological pathways of deacidification were constructed in S. uvarum, which made the S. uvarum carry out the AF and MLF simultaneously, as different genes encoding malolactic enzyme (mleS or mleA), malic enzyme (MAE2), and malate permease (melP or MAE1) from Schizosaccharomyces pombe, Lactococcus lactis, Oenococcus oeni, and Lactobacillus plantarum were heterologously expressed. For further inquiry, the effect of L-malic acid metabolism on the flavor balance in wine, the related flavor substances, higher alcohols, and esters production, were detected. Of all the recombinants, the strains WYm1SN with coexpression of malate permease gene MAE1 from S. pombe and malolactic enzyme gene mleS from L. lactis and WYm1m2 with coexpression of gene MAE1 and malate permease gene MAE2 from S. pombe could reduce the L-malic acid contents to about 1 g/L, and in which the mutant WYm1SN exhibited the best effect on the flavor quality improvement.
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Affiliation(s)
- Ping Li
- College of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Wenjun Song
- College of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Yumeng Wang
- College of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Xin Li
- College of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Shankai Wu
- College of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Bingjuan Li
- College of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Cuiying Zhang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
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3
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Richter P, Andersen G, Kahlenberg K, Mueller AU, Pirkwieser P, Boger V, Somoza V. Sodium-Permeable Ion Channels TRPM4 and TRPM5 are Functional in Human Gastric Parietal Cells in Culture and Modulate the Cellular Response to Bitter-Tasting Food Constituents. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:4906-4917. [PMID: 38378185 PMCID: PMC10921469 DOI: 10.1021/acs.jafc.3c09085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 01/28/2024] [Accepted: 01/29/2024] [Indexed: 02/22/2024]
Abstract
Gastric parietal cells secrete chloride ions and protons to form hydrochloric acid. Besides endogenous stimulants, e.g., acetylcholine, bitter-tasting food constituents, e.g., caffeine, induce proton secretion via interaction with bitter taste receptors (TAS2Rs), leading to increased cytosolic Ca2+ and cAMP concentrations. We hypothesized TAS2R activation by bitter tastants to result in proton secretion via cellular Na+ influx mediated by transient receptor potential channels (TRP) M4 and M5 in immortalized human parietal HGT-1 cells. Using the food-derived TAS2R agonists caffeine and l-arginine, we demonstrate both bitter compounds to induce a TRPM4/M5-mediated Na+ influx, with EC50 values of 0.65 and 10.38 mM, respectively, that stimulates cellular proton secretion. Functional involvement of TAS2Rs in the caffeine-evoked effect was demonstrated by means of the TAS2R antagonist homoeriodictyol, and stably CRISPR-Cas9-edited TAS2R43ko cells. Building on previous results, these data further support the suitability of HGT-1 cells as a surrogate cell model for taste cells. In addition, TRPM4/M5 mediated a Na+ influx after stimulating HGT-1 cells with the acetylcholine analogue carbachol, indicating an interaction of the digestion-associated cholinergic pathway with a taste-signaling pathway in parietal cells.
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Affiliation(s)
- Phil Richter
- TUM
School of Life Sciences Weihenstephan, Technical
University of Munich, Alte Akademie 8, Freising 85354, Germany
- Leibniz
Institute for Food Systems Biology at the Technical University of
Munich, Lise-Meitner-Str.
34, Freising 85354, Germany
| | - Gaby Andersen
- Leibniz
Institute for Food Systems Biology at the Technical University of
Munich, Lise-Meitner-Str.
34, Freising 85354, Germany
| | - Kristin Kahlenberg
- Leibniz
Institute for Food Systems Biology at the Technical University of
Munich, Lise-Meitner-Str.
34, Freising 85354, Germany
| | - Alina Ulrike Mueller
- Leibniz
Institute for Food Systems Biology at the Technical University of
Munich, Lise-Meitner-Str.
34, Freising 85354, Germany
| | - Philip Pirkwieser
- Leibniz
Institute for Food Systems Biology at the Technical University of
Munich, Lise-Meitner-Str.
34, Freising 85354, Germany
| | - Valerie Boger
- Leibniz
Institute for Food Systems Biology at the Technical University of
Munich, Lise-Meitner-Str.
34, Freising 85354, Germany
| | - Veronika Somoza
- Leibniz
Institute for Food Systems Biology at the Technical University of
Munich, Lise-Meitner-Str.
34, Freising 85354, Germany
- Chair
of Nutritional Systems Biology, TUM School of Life Sciences, Technical University of Munich, Lise-Meitner-Str. 34, Freising 85354, Germany
- Department
of Physiological Chemistry, Faculty of Chemistry, University of Vienna, Josef-Holaubek-Platz 2 (UZA II), Vienna 1090, Austria
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Mistlberger-Reiner A, Sterneder S, Reipert S, Wolske S, Somoza V. Extracellular Vesicles and Particles Modulate Proton Secretion in a Model of Human Parietal Cells. ACS OMEGA 2023; 8:2213-2226. [PMID: 36687051 PMCID: PMC9850724 DOI: 10.1021/acsomega.2c06442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 12/19/2022] [Indexed: 06/17/2023]
Abstract
The secretion of extracellular vesicles and particles (EVPs) is an important mechanism of cellular communication. In this work, we demonstrate a functional role of EVPs in mechanisms regulating gastric acid secretion. HGT-1 cells were used as a model system to assess proton secretion. First, in order to prove EVP secretion by HGT-1 cells, EVPs were isolated by size exclusion chromatography and characterized by nanoparticle tracking analysis, Western blot, and cryo transmission electron microscopy. For examination of the potential role of EVPs in proton secretion, HGT-1 cells were treated with pharmacological EV-inhibitors, resulting in a reduction of histamine-induced proton secretion. To demonstrate the functional role of EVPs in the mechanism of proton secretion, EVP-conditioned supernatant was collected after stimulation of HGT-1 cells with histamine, fractionated, and subjected to an activity screening. The results revealed constituents of the HGT-1-derived secretome with an MW of >100 kDa (including EVPs) to modulate proton secretion, while smaller constituents had no effect. Finally, a dose-dependent modulatory effect on proton secretion of HGT-1 cells was demonstrated by isolated HGT-1-derived EVPs. Hence, this study presents first results on the potential function of EVPs as a previously undiscovered mechanism of regulation of gastric acid secretion by parietal cells.
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Affiliation(s)
- Agnes Mistlberger-Reiner
- Department
of Physiological Chemistry, Faculty of Chemistry, University of Vienna, Vienna 1090, Austria
| | - Sonja Sterneder
- Department
of Physiological Chemistry, Faculty of Chemistry, University of Vienna, Vienna 1090, Austria
| | - Siegfried Reipert
- Core
Facility Cell Imaging and Ultrastructure Research, University of Vienna, Vienna 1030, Austria
| | - Sara Wolske
- Department
of Physiological Chemistry, Faculty of Chemistry, University of Vienna, Vienna 1090, Austria
| | - Veronika Somoza
- Department
of Physiological Chemistry, Faculty of Chemistry, University of Vienna, Vienna 1090, Austria
- Leibniz-Institute
for Food Systems Biology at the Technical University of Munich, Freising 85354, Germany
- Nutritional
Systems Biology, Technical University of
Munich, Freising 85354, Germany
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5
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Liao F, Zhu Z, Zhu S, Wan J, Fan C, Zhang X, Shu X, Lu N. Investigation of the prevalence and risk factors of Helicobacter pylori infection and the value of different gastric cancer screening methods in a low-risk region of gastric cancer in China. Ann Med 2023; 55:2243988. [PMID: 37669097 PMCID: PMC10481759 DOI: 10.1080/07853890.2023.2243988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 07/28/2023] [Accepted: 07/31/2023] [Indexed: 09/06/2023] Open
Abstract
BACKGROUND The aim of this current study was to identify the prevalence and risk factors of H. pylori infection in the low-risk area of gastric cancer in China, and evaluate the value of different gastric cancer screening methods. METHODS An epidemiological study was conducted in Yudu County, Jiangxi, China, and participants were followed up for 6 years. All participants completed a questionnaire, laboratory tests and endoscopy. Patients were divided into H. pylori positive and negative groups, and risk factors for H. pylori infection were identified using multivariate logistic regression analysis. RESULTS A total of 1962 residents were included, the prevalence of H. pylori infection was 33.8%. Multivariate analysis showed that annual income ≤20,000 yuan (OR: 1.44, 95% CI: 1.18-1.77, p < 0.001), loss of appetite (OR: 1.71, 95% CI: 1.29-2.26, p < 0.001), PG II >37.23 ng/mL (OR: 2.11, 95% CI: 1.50-2.97, p < 0.001), G-17 > 1.5 and ≤5.7 pmol/L (OR: 2.52, 95% CI: 1.93-3.30, p < 0.001), and G-17 > 5.7 pmol/L (OR: 1.96, 95% CI: 1.48-2.60, p < 0.001) were risk factors of H. pylori infection, while alcohol consumption (OR: 0.70, 95% CI: 0.54-0.91, p = 0.006) was a protective factor. According to the new gastric cancer screening method, the prevalence of low-grade intraepithelial neoplasia in the low-risk group, medium-risk group and high-risk group was 4.4%, 7.7% and 12.5% respectively (p < 0.001). CONCLUSIONS In a low-risk area of gastric cancer in China, the infection rate of H. pylori is relatively low. Low income, loss of appetite, high PG II, and high G-17 were risk factors for H. pylori infection, while alcohol consumption was a protective factor. Moreover, the new gastric cancer screening method better predicted low-grade intraepithelial neoplasia than the ABC method and the new ABC method.
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Affiliation(s)
- Foqiang Liao
- Department of Gastroenterology, Digestive Disease Hospital, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, P.R. China
| | - Zhenhua Zhu
- Department of Gastroenterology, Digestive Disease Hospital, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, P.R. China
- Jiangxi Clinical Research Center for Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, P.R. China
| | - Shusheng Zhu
- Department of Gastroenterology, Yudu County People’s Hospital, Ganzhou, Jiangxi, P.R.China
| | - Jianhua Wan
- Department of Gastroenterology, Digestive Disease Hospital, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, P.R. China
- Jiangxi Clinical Research Center for Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, P.R. China
| | - Chenglai Fan
- Department of Gastroenterology, Yudu County People’s Hospital, Ganzhou, Jiangxi, P.R.China
| | - Xu Zhang
- Department of Gastroenterology, Yudu County People’s Hospital, Ganzhou, Jiangxi, P.R.China
| | - Xu Shu
- Department of Gastroenterology, Digestive Disease Hospital, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, P.R. China
- Jiangxi Clinical Research Center for Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, P.R. China
| | - Nonghua Lu
- Department of Gastroenterology, Digestive Disease Hospital, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, P.R. China
- Jiangxi Clinical Research Center for Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, P.R. China
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6
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1H NMR spectroscopic discrimination of different beer styles combined with a chemical shift-based quantification approach. Eur Food Res Technol 2021. [DOI: 10.1007/s00217-021-03914-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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7
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Sterneder S, Stoeger V, Dugulin CA, Liszt KI, Di Pizio A, Korntheuer K, Dunkel A, Eder R, Ley JP, Somoza V. Astringent Gallic Acid in Red Wine Regulates Mechanisms of Gastric Acid Secretion via Activation of Bitter Taste Sensing Receptor TAS2R4. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:10550-10561. [PMID: 34460245 DOI: 10.1021/acs.jafc.1c03061] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Red wine is rich in phenolic compounds, which chiefly determine its characteristic taste. One of its major phenolic acid constituents for which an astringency, yet no clear contribution to bitter taste has been reported, is gallic acid (GA). In previous studies, we have demonstrated bitter-tasting constituents to regulate cellular proton secretion (PS) as a key mechanism of gastric acid secretion via activation of bitter taste sensing receptors (TAS2Rs). Here, we hypothesized a contributing role of GA to the red wine-stimulated effect on PS in human gastric tumor cells (HGT-1 cells). Sensory analyses revealed that 10 μM GA as the lowest concentration tested more bitter than tap water, with increasing bitter ratings up to 1000 μM. In HGT-1 cells, the concentration of 10 μM GA evoked the most pronounced effect on PS secretion, either when added to cells as in-water solution or when spiked to a red wine matrix. GA-spiking of Zweigelt and Blaufränkisch red wine samples up to a concentration of 10 μM resulted in an equally stimulated PS, whereas the non-GA-spiked wine samples demonstrated contrary effects on PS, indicating a functional role of GA on PS. Involvement of TAS2R4 in the GA-induced PS was verified by means of an HGT-1 homozygote CRISPR-Cas9 TAS2R4 knockout approach. Moreover, gene expression analyses revealed GA to increase TAS2R4. These results demonstrate a functional role of TAS2R4 in GA-evoked PS as a key mechanism of gastric acid secretion aiding digestion. Moreover, our data provide mechanistic insights, which will help to produce stomach-friendly red wines.
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Affiliation(s)
- Sonja Sterneder
- Department of Physiological Chemistry, Faculty of Chemistry, University of Vienna, Althanstrasse 14 (UZA II), Vienna 1090, Austria
| | - Verena Stoeger
- Department of Physiological Chemistry, Faculty of Chemistry, University of Vienna, Althanstrasse 14 (UZA II), Vienna 1090, Austria
| | - Celina Angela Dugulin
- Department of Physiological Chemistry, Faculty of Chemistry, University of Vienna, Althanstrasse 14 (UZA II), Vienna 1090, Austria
| | - Kathrin Ingrid Liszt
- Department of Physiological Chemistry, Faculty of Chemistry, University of Vienna, Althanstrasse 14 (UZA II), Vienna 1090, Austria
| | - Antonella Di Pizio
- Leibniz-Institute of Food Systems Biology at the Technical University of Munich, 85354 Freising, Germany
| | - Karin Korntheuer
- Federal College and Research Institute for Viticulture and Pomology, Klosterneuburg 3400, Austria
| | - Andreas Dunkel
- Leibniz-Institute of Food Systems Biology at the Technical University of Munich, 85354 Freising, Germany
| | - Reinhard Eder
- Federal College and Research Institute for Viticulture and Pomology, Klosterneuburg 3400, Austria
| | - Jakob Peter Ley
- Research & Technology Flavors Division, Symrise AG, 37603 Holzminden, Germany
| | - Veronika Somoza
- Department of Physiological Chemistry, Faculty of Chemistry, University of Vienna, Althanstrasse 14 (UZA II), Vienna 1090, Austria
- Leibniz-Institute of Food Systems Biology at the Technical University of Munich, 85354 Freising, Germany
- Nutritional Systems Biology, Technical University of Munich, 85354 Freising, Germany
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8
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Zopun M, Lieder B, Holik AK, Ley JP, Hans J, Somoza V. Noncaloric Sweeteners Induce Peripheral Serotonin Secretion via the T1R3-Dependent Pathway in Human Gastric Parietal Tumor Cells (HGT-1). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:7044-7053. [PMID: 29874909 DOI: 10.1021/acs.jafc.8b02071] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The role of sweet taste in energy intake and satiety regulation is still controversial. Noncaloric artificial sweeteners (NCSs) are thought to help reduce energy intake, although little is known about their impact on the satiating neurotransmitter serotonin (5-HT). In the gastrointestinal (GI) tract, 5-HT regulates gastric acid secretion and gastric motility, both part of the complex network of mechanisms regulating food intake and satiety. This study demonstrated a stimulating impact compared to controls (100%) on 5-HT release in human gastric tumor cells (HGT-1) by the NCSs cyclamate (50 mM, 157% ± 6.3%), acesulfame potassium (Ace K, 50 mM, 197% ± 8.6%), saccharin (50 mM, 147% ± 6.7%), sucralose (50 mM, 194% ± 11%), and neohesperidin dihydrochalcone (NHDC, 1 mM, 201% ± 13%). Although these effects were not associated with the sweet taste intensity of the NCSs tested, involvement of the sweet receptor subunit T1R3 in the NCS-evoked response was demonstrated by mRNA expression of TAS1R3, co-incubation experiments using the T1R3 receptor antagonist lactisole, and a TAS1R3 siRNA knockdown approach. Analysis of the downstream signaling revealed activation of the cAMP/ERK/Ca2+ cascade. Co-treatment experiments with 10 mM glucose enhanced the 5-HT release induced by cyclamate, Ace K, saccharin, and sucralose, thereby supporting the enhancing effect of glucose on a NCS-mediated response. Overall, the results obtained identify NCSs as potent inducers of 5-HT release via T1R3 in human gastric parietal cells in culture and warrant in vivo studies to demonstrate their efficacy.
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Affiliation(s)
- Muhammet Zopun
- Department of Physiological Chemistry, Faculty of Chemistry , University of Vienna , Althanstraße 14 , Vienna 1090 , Austria
| | - Barbara Lieder
- Department of Physiological Chemistry, Faculty of Chemistry , University of Vienna , Althanstraße 14 , Vienna 1090 , Austria
- Christian Doppler Laboratory for Taste Research, Faculty of Chemistry , University of Vienna , Althanstraße 14 , Vienna 1090 , Austria
| | - Ann-Katrin Holik
- Department of Physiological Chemistry, Faculty of Chemistry , University of Vienna , Althanstraße 14 , Vienna 1090 , Austria
| | - Jakop P Ley
- Symrise AG , Mühlenfeldstraße 1 , 37603 Holzminden , Germany
| | - Joachim Hans
- Symrise AG , Mühlenfeldstraße 1 , 37603 Holzminden , Germany
| | - Veronika Somoza
- Department of Physiological Chemistry, Faculty of Chemistry , University of Vienna , Althanstraße 14 , Vienna 1090 , Austria
- Christian Doppler Laboratory for Bioactive Aroma Compounds, Faculty of Chemistry , University of Vienna , Althanstraße 14 , Vienna 1090 , Austria
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9
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Stoeger V, Liszt KI, Lieder B, Wendelin M, Zopun M, Hans J, Ley JP, Krammer GE, Somoza V. Identification of Bitter-Taste Intensity and Molecular Weight as Amino Acid Determinants for the Stimulating Mechanisms of Gastric Acid Secretion in Human Parietal Cells in Culture. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:6762-6771. [PMID: 29879844 DOI: 10.1021/acs.jafc.8b01802] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Secretion of gastric acid, aimed at preventing bacterial growth and aiding the digestion of foods in the stomach, is chiefly stimulated by dietary intake of protein and amino acids (AAs). However, AAs' key structural determinants responsible for their effects on mechanisms regulating gastric acid secretion (GAS) have not been identified yet. In this study, AAs have been tested in the parietal cell model HGT-1 on GAS and on mRNA expression of genes regulating GAS. AAs' taste intensities from 0 (not bitter at all) to 10 (very bitter) were assessed in a sensory study, in which ARG (l: 6.42 ± 0.41; d: 4.62 ± 0.59) and ILE (l: 4.21 ± 0.43; d: 2.28 ± 0.33) were identified as bitter-tasting candidates in both isomeric forms. Pearson correlation showed that GAS in HGT-1 cells is directly associated with the bitter taste quality ( r: -0.654) in combination with the molecular weight of l-AA ( r: -0.685).
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Affiliation(s)
| | | | | | - Martin Wendelin
- Symrise Austria , Sensory and Consumer Insights , Heiligenstädterstraße 31/3 , 1190 Wien , Austria
| | | | - Joachim Hans
- Symrise AG , Research & Technology Flavors Division , P.O. Box 1253, 37603 Holzminden , Germany
| | - Jakob P Ley
- Symrise AG , Research & Technology Flavors Division , P.O. Box 1253, 37603 Holzminden , Germany
| | - Gerhard E Krammer
- Symrise AG , Research & Technology Flavors Division , P.O. Box 1253, 37603 Holzminden , Germany
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10
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Zopun M, Liszt KI, Stoeger V, Behrens M, Redel U, Ley JP, Hans J, Somoza V. Human Sweet Receptor T1R3 is Functional in Human Gastric Parietal Tumor Cells (HGT-1) and Modulates Cyclamate and Acesulfame K-Induced Mechanisms of Gastric Acid Secretion. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:4842-4852. [PMID: 29665689 DOI: 10.1021/acs.jafc.8b00658] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The noncaloric sweeteners (NCSs) cyclamate (Cycl) and acesulfame K (AceK) are widely added to foods and beverages. Little is known about their impact on gastric acid secretion (GAS), which is stimulated by dietary protein and bitter-tasting compounds. Since Cycl and AceK have a bitter off taste in addition to their sweet taste, we hypothesized they modulate mechanisms of GAS in human gastric parietal cells (HGT-1). HGT-1 cells were exposed to sweet tastants (50 mM of glucose, d-threonine, Cycl, or AceK) and analyzed for their intracellular pH index (IPX), as an indicator of proton secretion by means of a pH-sensitive dye, and for mRNA levels of GAS-associated genes by RT-qPCR. Since the NCSs act via the sweet taste-sensing receptor T1R2/T1R3, mRNA expression of the corresponding genes was analyzed in addition to immunocytochemical localization of the T1R2 and T1R3 receptor proteins. Exposure of HGT-1 cells to AceK or d-threonine increased the IPX to 0.60 ± 0.05 and 0.80 ± 0.04 ( P ≤ 0.05), respectively, thereby indicating a reduced secretion of protons, whereas Cycl demonstrated the opposite effect with IPX values of -0.69 ± 0.08 ( P ≤ 0.05) compared to controls (IPX = 0). Cotreatment with the T1R3-inhibitor lactisole as well as a TAS1R3 siRNA knock-down approach reduced the impact of Cycl, AceK, and d-thr on proton release ( P ≤ 0.05), whereas cotreatment with 10 mM glucose enhanced the NCS-induced effect ( P ≤ 0.05). Overall, we demonstrated Cycl and AceK as modulators of proton secretion in HGT-1 cells and identified T1R3 as a key element in this response.
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Affiliation(s)
- Muhammet Zopun
- Faculty of Chemistry, Department of Physiological Chemistry , University of Vienna , Althanstraße 14 , Vienna 1090 , Austria
| | - Kathrin I Liszt
- Faculty of Chemistry, Christian Doppler Laboratory for Bioactive Aroma Compounds , University of Vienna , Althanstraße 14 , Vienna 1090 , Austria
| | - Verena Stoeger
- Faculty of Chemistry, Christian Doppler Laboratory for Bioactive Aroma Compounds , University of Vienna , Althanstraße 14 , Vienna 1090 , Austria
| | - Maik Behrens
- Department of Molecular Genetics , German Institute of Human Nutrition Potsdam-Rehbruecke , Arthur-Scheunert-Allee , 114-116 Nuthetal , Germany
| | - Ulrike Redel
- Department of Molecular Genetics , German Institute of Human Nutrition Potsdam-Rehbruecke , Arthur-Scheunert-Allee , 114-116 Nuthetal , Germany
| | - Jakob P Ley
- Symrise AG , Mühlenfeldstraße 1 , 37603 Holzminden , Germany
| | - Joachim Hans
- Symrise AG , Mühlenfeldstraße 1 , 37603 Holzminden , Germany
| | - Veronika Somoza
- Faculty of Chemistry, Department of Physiological Chemistry , University of Vienna , Althanstraße 14 , Vienna 1090 , Austria
- Faculty of Chemistry, Christian Doppler Laboratory for Bioactive Aroma Compounds , University of Vienna , Althanstraße 14 , Vienna 1090 , Austria
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11
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Liszt KI, Hans J, Ley JP, Köck E, Somoza V. Characterization of Bitter Compounds via Modulation of Proton Secretion in Human Gastric Parietal Cells in Culture. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:2295-2300. [PMID: 28525714 DOI: 10.1021/acs.jafc.7b01051] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
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 tool to identify potential bitter-masking compounds. Nevertheless, a sensory human panel is necessary to quantify the bitter-masking potency.
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Affiliation(s)
- Kathrin I Liszt
- Department of Nutritional and Physiological Chemistry, Faculty of Chemistry , University of Vienna , Althanstraße 14 , 1090 Vienna , Austria
- Christian Doppler Laboratory for Bioactive Aroma Compounds , University of Vienna , Althanstraße 14 , 1090 Vienna , Austria
| | - Joachim Hans
- Symrise AG, Ingredient Research Flavor & Nutrition , Mühlenfeldstraße , 37603 Holzminden , Germany
| | - Jakob P Ley
- Symrise AG, Ingredient Research Flavor & Nutrition , Mühlenfeldstraße , 37603 Holzminden , Germany
| | - Elke Köck
- Department of Nutritional and Physiological Chemistry, Faculty of Chemistry , University of Vienna , Althanstraße 14 , 1090 Vienna , Austria
| | - Veronika Somoza
- Department of Nutritional and Physiological Chemistry, Faculty of Chemistry , University of Vienna , Althanstraße 14 , 1090 Vienna , Austria
- Christian Doppler Laboratory for Bioactive Aroma Compounds , University of Vienna , Althanstraße 14 , 1090 Vienna , Austria
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12
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Tyrell T. Strategies for Reducing Succinic Acid Concentrations in Beer. JOURNAL OF THE AMERICAN SOCIETY OF BREWING CHEMISTS 2018. [DOI: 10.1094/asbcj-2014-1010-01] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Thomas Tyrell
- Versuchs- und Lehranstalt für Brauerei (VLB) in Berlin e.V., Seestrasse 13, 13353 Berlin, Germany
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13
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Caffeine induces gastric acid secretion via bitter taste signaling in gastric parietal cells. Proc Natl Acad Sci U S A 2017; 114:E6260-E6269. [PMID: 28696284 DOI: 10.1073/pnas.1703728114] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Caffeine, generally known as a stimulant of gastric acid secretion (GAS), is a bitter-tasting compound that activates several taste type 2 bitter receptors (TAS2Rs). TAS2Rs are expressed in the mouth and in several extraoral sites, e.g., in the gastrointestinal tract, in which their functional role still needs to be clarified. We hypothesized that caffeine evokes effects on GAS by activation of oral and gastric TAS2Rs and demonstrate that caffeine, when administered encapsulated, stimulates GAS, whereas oral administration of a caffeine solution delays GAS in healthy human subjects. Correlation analysis of data obtained from ingestion of the caffeine solution revealed an association between the magnitude of the GAS response and the perceived bitterness, suggesting a functional role of oral TAS2Rs in GAS. Expression of TAS2Rs, including cognate TAS2Rs for caffeine, was shown in human gastric epithelial cells of the corpus/fundus and in HGT-1 cells, a model for the study of GAS. In HGT-1 cells, various bitter compounds as well as caffeine stimulated proton secretion, whereby the caffeine-evoked effect was (i) shown to depend on one of its cognate receptor, TAS2R43, and adenylyl cyclase; and (ii) reduced by homoeriodictyol (HED), a known inhibitor of caffeine's bitter taste. This inhibitory effect of HED on caffeine-induced GAS was verified in healthy human subjects. These findings (i) demonstrate that bitter taste receptors in the stomach and the oral cavity are involved in the regulation of GAS and (ii) suggest that bitter tastants and bitter-masking compounds could be potentially useful therapeutics to regulate gastric pH.
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14
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Serreli G, Jerković I, Marijanović Z, Gil KA, Tuberoso CIG. Evaluation of natural occurring bioactive compounds and antioxidant activity in Nuragus white wines. Food Res Int 2017; 99:571-576. [PMID: 28784518 DOI: 10.1016/j.foodres.2017.06.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 06/09/2017] [Accepted: 06/17/2017] [Indexed: 01/09/2023]
Abstract
The aim of the present study is to highlight volatile and targeted non-volatile bioactive compounds in Nuragus wines, as a part of Italian DOC (Controlled Origin Designation) white wines. So far there has not been any systematic study of the chemical compositions and antioxidant activity of this monovarietal wine. Phenolic compounds, volatiles and organic acids were analysed and antioxidant capacity was assessed by spectrophotometric assays. Chromaticity coordinates and technological parameters (alcohol, reducing sugars, pH, total and volatile acidity) were also evaluated. Gallic acid (128±87mg/L), trans-caftaric acid (81±27mg/L) and tyrosol (25±8mg/L) were the most abundant phenolic compounds. The major headspace volatiles were isoamyl alcohol (35.8-76.6%) and 2-phenylethanol (5.9-24.9%). In the wine extracts, the most abundant were 2-phenylethanol (12.3-40.0%), 4-hydroxy-2-phenylethanol (12.5-33.3%), diethyl succinate (5.8-30.3%), (Z)-octadec-9-en-1-ol (5.9-18.3%) and tryptophol (2.8-15.6%). Nuragus wines exhibited an excellent antioxidant capacity. The data obtained may help Nuragus wine producers to promote this monovarietal wine as a valid complement associated with the Mediterranean diet.
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Affiliation(s)
- Gabriele Serreli
- Department of Biomedical Sciences, Unit of Experimental Pathology, University of Cagliari, Cittadella Universitaria SS 554, 09042 Monserrato, CA, Italy
| | - Igor Jerković
- Department of Organic Chemistry, Faculty of Chemistry and Technology, University of Split, Ruđera Boškovića 35, 21000 Split, Croatia
| | - Zvonimir Marijanović
- Department of Food Technology, Marko Marulić Polytechnic in Knin, Petra Krešimira IV 30, 22300 Knin, Croatia
| | - Katarzyna Angelika Gil
- Department of Life and Environmental Sciences, University of Cagliari, Via Ospedale 72, 09124 Cagliari, Italy
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15
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Abstract
Several physicochemical properties were measured in commercial tequila brands: conductivity, density, pH, sound velocity, viscosity, and refractive index. Physicochemical data were analyzed by Principal Component Analysis (PCA), cluster analysis, and the one-way analysis of variance to identify the quality and authenticity of tequila brands. According to the Principal Component Analysis, the existence of 3 main components was identified, explaining the 87.76% of the total variability of physicochemical measurements. In general, all tequila brands appeared together in the plane of the first two principal components. In the cluster analysis, four groups showing similar characteristics were identified. In particular, one of the clusters contains some tequila brands that are not identified by the Regulatory Council of Tequila and do not meet the quality requirements established in the Mexican Official Standard 006. These tequila brands are characterized by having higher conductivity and density and lower viscosity and refractive index, determined by one-way analysis of variance. Therefore, these economical measurements, PCA, and cluster analysis can be used to determinate the authenticity of a tequila brand.
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16
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Liszt KI, Eder R, Wendelin S, Somoza V. Identification of Catechin, Syringic Acid, and Procyanidin B2 in Wine as Stimulants of Gastric Acid Secretion. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:7775-7783. [PMID: 26244870 DOI: 10.1021/acs.jafc.5b02879] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Organic acids of wine, in addition to ethanol, have been identified as stimulants of gastric acid secretion. This study characterized the influence of other wine compounds, particularly phenolic compounds, on proton secretion. Forty wine parameters were determined in four red wines and six white wines, including the contents of organic acids and phenolic compounds. The secretory activity of the wines was determined in a gastric cell culture model (HGT-1 cells) by means of a pH-sensitive fluorescent dye. Red wines stimulated proton secretion more than white wines. Lactic acid and the phenolic compounds syringic acid, catechin, and procyanidin B2 stimulated proton secretion and correlated with the pro-secretory effect of the wines. Addition of the phenolic compounds to the least active white wine sample enhanced its proton secretory effect by 65 ± 21% (p < 0.05). These results indicate that not only malic and lactic acid but also bitter and astringent tasting phenolic compounds in wine contribute to its stimulatory effect on gastric acid secretion.
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Affiliation(s)
| | - Reinhard Eder
- Federal College and Research Institute for Viticulture and Pomology , Klosterneuburg 3400, Austria
| | - Sylvia Wendelin
- Federal College and Research Institute for Viticulture and Pomology , Klosterneuburg 3400, Austria
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17
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Tyrell T, Fischer F. Influencing the organic acid profile of beer by application of adsorbent materials. JOURNAL OF THE INSTITUTE OF BREWING 2014. [DOI: 10.1002/jib.151] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- T. Tyrell
- Versuchs- und Lehranstalt für Brauerei in Berlin e.V.; Seestraße 13, 13353 Berlin Germany
| | - F. Fischer
- Versuchs- und Lehranstalt für Brauerei in Berlin e.V.; Seestraße 13, 13353 Berlin Germany
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18
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Rubach M, Lang R, Bytof G, Stiebitz H, Lantz I, Hofmann T, Somoza V. A dark brown roast coffee blend is less effective at stimulating gastric acid secretion in healthy volunteers compared to a medium roast market blend. Mol Nutr Food Res 2014; 58:1370-3. [DOI: 10.1002/mnfr.201300890] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Revised: 01/07/2014] [Accepted: 01/08/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Malte Rubach
- German Research Center for Food Chemistry; Freising Germany
- Department of Food Science, University of Wisconsin; Madison WI U.S.A
| | - Roman Lang
- Chair of Food Chemistry and Molecular and Sensory Science; Technische Universität München; Freising Germany
| | | | | | | | - Thomas Hofmann
- Chair of Food Chemistry and Molecular and Sensory Science; Technische Universität München; Freising Germany
| | - Veronika Somoza
- German Research Center for Food Chemistry; Freising Germany
- Department of Food Science, University of Wisconsin; Madison WI U.S.A
- Department of Nutritional and Physiological Chemistry; University of Vienna; Vienna Austria
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19
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Wine, Food and Health. WINE SCIENCE 2014. [PMCID: PMC7173591 DOI: 10.1016/b978-0-12-381468-5.00012-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Wine has historically been associated with religious rights, used as a salubrious beverage, employed as a medication as well as a medicinal solvent, and consumed as a food accompaniment. It is the latter that is most intimately associated in the minds of most modern consumers. Despite this, there is little flavor commonality on which pairing could be based. The first section of the chapter examines this feature, and wine’s primary role as a palate cleanser and food condiment. The synergistic role of food and wine in suppressing each other’s least pleasant attributes is also explained. The final section deals with the latest evidence relating to the many beneficial health effects of moderate wine consumption, shortfalls in the data, headache induction, dental erosion, and conditions under which wine intake is contraindicated.
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