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Xiang X, Chen K, Li A, Yang G, An X, Kan J. Decoding the bitter taste of Idesia polycarpa var. vestita Diels fruit: Bitterness contribution and mechanisms. Food Chem 2024; 460:140609. [PMID: 39094345 DOI: 10.1016/j.foodchem.2024.140609] [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: 02/20/2024] [Revised: 07/19/2024] [Accepted: 07/22/2024] [Indexed: 08/04/2024]
Abstract
To comprehensively explore the contribution and mechanisms of identified low-threshold bitter substances in Idesia polycarpa var. vestita Diels (I. vestita) fruit, we performed quantification and elucidated their interactions with main bitter taste receptors through molecular docking. The established method for quantifying bitter compounds in I. vestita fruit was validated, yielding satisfactory parameters for linearity, stability, and accuracy. Idescarpin (17.71-101.05 mg/g) and idesin (7.88-77.14 mg/g) were the predominant bitter compounds in terms of content. Taste activity values (TAVs) exceeded 10 for the bitter substances, affirming their pivotal role as major contributors to overall bitterness of I. vestita fruit. Notably, idescarpin with the highest TAV, played a crucial role in generating the bitterness of I. vestita fruit. Hydrogen bonds and hydrophobic interactions were the main driving forces. This study holds potential implications for industrial development of I. vestita fruit by providing novel insights into the mechanism underlying its bitterness formation.
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Affiliation(s)
- Xuwen Xiang
- College of Food Science, Southwest University, 2 Tiansheng Road, Beibei, Chongqing 400715, PR China; Laboratory of Quality & Safety Risk Assessment for Agro-products on Storage and Preservation (Chongqing), Ministry of Agriculture and Rural Affairs of the People's Republic of China, Chongqing 400715, PR China
| | - Kewei Chen
- College of Food Science, Southwest University, 2 Tiansheng Road, Beibei, Chongqing 400715, PR China; Laboratory of Quality & Safety Risk Assessment for Agro-products on Storage and Preservation (Chongqing), Ministry of Agriculture and Rural Affairs of the People's Republic of China, Chongqing 400715, PR China; Chinese-Hungarian Cooperative Research Centre for Food Science, Chongqing 400715, PR China; Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Chongqing 400715, PR China
| | - Aijun Li
- College of Food Science, Southwest University, 2 Tiansheng Road, Beibei, Chongqing 400715, PR China; Laboratory of Quality & Safety Risk Assessment for Agro-products on Storage and Preservation (Chongqing), Ministry of Agriculture and Rural Affairs of the People's Republic of China, Chongqing 400715, PR China
| | - Gang Yang
- College of Food Science, Southwest University, 2 Tiansheng Road, Beibei, Chongqing 400715, PR China; Laboratory of Quality & Safety Risk Assessment for Agro-products on Storage and Preservation (Chongqing), Ministry of Agriculture and Rural Affairs of the People's Republic of China, Chongqing 400715, PR China
| | - Xiaofeng An
- Chongqing Shanlinyuan Forestry Comprehensive Development Co., Ltd., Chongqing 400800, PR China
| | - Jianquan Kan
- College of Food Science, Southwest University, 2 Tiansheng Road, Beibei, Chongqing 400715, PR China; Laboratory of Quality & Safety Risk Assessment for Agro-products on Storage and Preservation (Chongqing), Ministry of Agriculture and Rural Affairs of the People's Republic of China, Chongqing 400715, PR China; Chinese-Hungarian Cooperative Research Centre for Food Science, Chongqing 400715, PR China; Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Chongqing 400715, PR China.
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2
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Choi Y, Wong RR, Cha YK, Park TH, Kim Y, Chung SJ. Sweet-bitter taste interactions in binary mixtures of sweeteners: Relationship between taste receptor activities and sensory perception. Food Chem 2024; 459:140343. [PMID: 39018621 DOI: 10.1016/j.foodchem.2024.140343] [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: 03/22/2024] [Revised: 06/28/2024] [Accepted: 07/03/2024] [Indexed: 07/19/2024]
Abstract
This study investigated the effects of various binary sweetener mixtures on sweetness enhancement and their interactions with sweet or bitter taste receptors, focusing on sensory perception and receptor activity. Acesulfame K or saccharin was mixed with allulose, aspartame, erythritol, fructose, glucose, or sucrose to match a target sucrose sweetness. The effects of the mixtures on sweet and bitter taste receptors (in the human embryonic kidney -293 cells) and sensory taste intensities were evaluated. Sweetness enhancement at the sweet taste receptor level was observed in some cases, with several monosaccharides reducing the acesulfame K- or saccharin-induced bitter taste receptor activity. Combining acesulfame K or saccharin with any of the six sweeteners perceptually enhanced sweetness (60% ∼ 100% in 50:50 ratio), correlating with a reduction in inherent bitterness (-35% ∼ -63% in 50:50 ratio). This finding suggests that sweetness perception likely increased because the monosaccharides mitigate the activation of bitter receptors caused by high-potency sweeteners.
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Affiliation(s)
- Yoonha Choi
- Department of Nutritional Science and Food Management, Ewha Womans University, Seoul 03760, Republic of Korea.
| | - Run Rou Wong
- Department of Nutritional Science and Food Management, Ewha Womans University, Seoul 03760, Republic of Korea.
| | - Yeon Kyung Cha
- Interdisciplinary Program in Bioengineering, Seoul National University, Seoul 08826, Republic of Korea.
| | - Tai Hyun Park
- Department of Nutritional Science and Food Management, Ewha Womans University, Seoul 03760, Republic of Korea; Interdisciplinary Program in Bioengineering, Seoul National University, Seoul 08826, Republic of Korea.
| | - Yuri Kim
- Department of Nutritional Science and Food Management, Ewha Womans University, Seoul 03760, Republic of Korea; Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea.
| | - Seo-Jin Chung
- Department of Nutritional Science and Food Management, Ewha Womans University, Seoul 03760, Republic of Korea.
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3
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Huang P, Wang Z, Cheng Y, Gao W, Cui C. Integrated virtual screening coupled with sensory evaluation identifies N-succinyl-L-tryptophan as a novel compound with multiple taste enhancement properties. Food Chem 2024; 457:140131. [PMID: 38917565 DOI: 10.1016/j.foodchem.2024.140131] [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: 03/15/2024] [Revised: 06/02/2024] [Accepted: 06/14/2024] [Indexed: 06/27/2024]
Abstract
N-Succinyl amino acids (N-Suc-AAs) are garnering attention for their potential as taste-active compounds. The intricate variety of N-Suc-AAs presented considerable challenges in identifying those with taste-active properties. Consequently, we employed structure-based virtual screening to pinpoint taste-active N-Suc-AAs, revealing N-succinyl-L-tryptophan (ST) as a compound with high affinity for different taste receptors. Following this discovery, ST was synthesized through an enzymatic process, achieving a yield of 40.2%, with its structure verified via NMR spectroscopy. Sensory evaluation alongside electronic tongue assessments indicated that ST at a concentration of 1 mg/L significantly enhances umami, kokumi, and saltiness intensities, while concurrently mitigating bitterness from various bitter compounds, whilst itself remaining tasteless. Additionally, time-intensity (TI) results elucidated a marked augmentation in umami duration and a notable diminution in bitterness duration for solutions imbued with 1 mg/L ST. Molecular docking study suggested ST interacted with diverse taste receptors as an agonist or antagonist, primarily through hydrogen bonds and hydrophobic interactions. This study marked the inaugural report on the enzymatic synthesis of ST and its efficacy in improving taste characteristics, underscoring the importance of ST in improving sensory qualities of food products and fostering innovation within the seasoning industry.
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Affiliation(s)
- Pimiao Huang
- School of Food Science and Engineering, South China University of Technology, Wushan Road 381, 510640 Guangzhou, Guangdong, China
| | - Zhirong Wang
- School of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Yuqing Cheng
- School of Food Science and Engineering, South China University of Technology, Wushan Road 381, 510640 Guangzhou, Guangdong, China
| | - Wenxiang Gao
- School of Food Science and Engineering, South China University of Technology, Wushan Road 381, 510640 Guangzhou, Guangdong, China
| | - Chun Cui
- School of Food Science and Engineering, South China University of Technology, Wushan Road 381, 510640 Guangzhou, Guangdong, China.
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4
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Chen MM, Lin S, Wang ZH, Zhang SX, Chen FY, Chen J, Guo DS, Meng Q. Sulfonated Azocalix[4]arene: A Universal and Effective Taste-Masking Agent. ACS APPLIED MATERIALS & INTERFACES 2024; 16:53591-53598. [PMID: 39316639 DOI: 10.1021/acsami.4c13762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/26/2024]
Abstract
Many active pharmaceutical ingredients have a specific bitter taste. To enhance patient compliance and treatment efficacy, taste-masking agents are crucial in oral drug formulations. Confronting numerous bitter drug molecules with varied structures, the pharmaceutical field strives to explore and develop universal and effective masking approaches. Here, we reported sulfonated azocalix[4]arene (SAC4A), a universal supramolecular masking agent with deep cavity that provides stronger hydrophobic effect and larger interaction area during recognition, allowing high binding affinity to bitter drug molecules. Moreover, bitter drugs could deeply buried in the cavity, with the bitterness effectively masked. As a result, SAC4A can bind to 16 different bitter drugs with high affinities, encompassing alkaloids, flavonoids, terpenoids, and more, while maintaining high biocompatibility. As anticipated, SAC4A effectively masks the unpalatable bitter taste associated with these drugs. Consequently, SAC4A is a promising universal and effective supramolecular masking agent.
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Affiliation(s)
- Meng-Meng Chen
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Key Laboratory of Functional Polymer Materials (Ministry of Education), Frontiers Science Center for New Organic Matter, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, China
| | - Shujie Lin
- State Key Laboratory of National Security Specially Needed Medicines, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China
| | - Ze-Han Wang
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Key Laboratory of Functional Polymer Materials (Ministry of Education), Frontiers Science Center for New Organic Matter, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, China
| | - Shu-Xin Zhang
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Key Laboratory of Functional Polymer Materials (Ministry of Education), Frontiers Science Center for New Organic Matter, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, China
| | - Fang-Yuan Chen
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Key Laboratory of Functional Polymer Materials (Ministry of Education), Frontiers Science Center for New Organic Matter, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, China
| | - Junyi Chen
- State Key Laboratory of National Security Specially Needed Medicines, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China
| | - Dong-Sheng Guo
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Key Laboratory of Functional Polymer Materials (Ministry of Education), Frontiers Science Center for New Organic Matter, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, China
- Xinjiang Key Laboratory of Novel Functional Materials Chemistry, College of Chemistry and Environmental Sciences, Kashi University, Kashi 844000, China
| | - Qingbin Meng
- State Key Laboratory of National Security Specially Needed Medicines, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China
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Mori S, Nakamura N, Fuchigami A, Yoshimoto S, Sakakibara M, Ozawa T, Aoki J, Inoue A, Sumida H, Ando H, Nakamura M. Intracellular TAS2Rs act as a gatekeeper for the excretion of harmful substances via ABCB1 in keratinocytes. FASEB Bioadv 2024; 6:424-441. [PMID: 39372126 PMCID: PMC11452442 DOI: 10.1096/fba.2024-00074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Revised: 07/19/2024] [Accepted: 08/19/2024] [Indexed: 10/08/2024] Open
Abstract
Bitter taste receptors (TAS2Rs) are not only expressed in the oral cavity but also in skin. Extraoral TAS2Rs are thought to be involved in non-taste perception and tissue-specific functions. Keratinocytes that express TAS2Rs in the skin provide a first-line defense against external threats. However, the functional roles of these receptors in host defense remain unclear. Here, we demonstrated the sensory role of intracellularly located TAS2Rs against toxic substances in keratinocytes. Although many G protein-coupled receptors elicit signals from the surface, TAS2Rs were found to localize intracellularly, possibly to the ER, in human keratinocytes and HaCaT cells. TAS2R38, one of the TAS2R members, activated the Gα12/13/RhoA/ROCK/p38 MAP kinase/NF-κB pathway upon stimulation by phenylthiocarbamide (PTC), an agonist for this receptor, leading to the production of ABC transporters, such as ABCB1, in these cells. Notably, treatment with bitter compounds, such as PTC and saccharin, induced the upregulation of ABCB1 in HaCaT cells. Mechanistically, intracellular TAS2R38 and its downstream signaling Gα12/13/RhoA/ROCK/p38 MAP kinase/NF-κB pathway were identified to be responsible for the above effect. Pretreatment with PTC prevented the accumulation of rhodamine 123 because of its excretion via ABCB1. Furthermore, pretreatment with PTC or saccharin counteracted the effect of the toxic compound, diphenhydramine, and pretreated HaCaT cells were found to proliferate faster than untreated cells. This anti-toxic effect was suppressed by treatment with verapamil, an ABCB1 inhibitor, indicating that enhanced ABCB1 helps clear toxic substances. Altogether, harmless activators of TAS2Rs may be promising drugs that enhance the excretion of toxic substances from the human skin.
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Affiliation(s)
- Sazanami Mori
- Department of Bioscience, Graduate School of Life ScienceOkayama University of ScienceOkayamaJapan
| | - Natsuki Nakamura
- Department of Bioscience, Graduate School of Life ScienceOkayama University of ScienceOkayamaJapan
| | - Ayane Fuchigami
- Department of Bioscience, Graduate School of Life ScienceOkayama University of ScienceOkayamaJapan
| | - Satoshi Yoshimoto
- Department of Bioscience, Graduate School of Life ScienceOkayama University of ScienceOkayamaJapan
| | - Moe Sakakibara
- Department of Dermatology, Faculty of MedicineThe University of TokyoBunkyo‐kuTokyoJapan
| | - Toshiyuki Ozawa
- Pharmaco‐Physiology and Kinetics Collaborate Research Division, Graduate School of MedicineOsaka Metropolitan UniversityOsakaJapan
| | - Junken Aoki
- Department of Health Chemistry, Graduate School of Pharmaceutical ScienceThe University of TokyoBunkyo‐kuTokyoJapan
- Japan Agency for Medical Research and DevelopmentCore Research for Evolutional Science and TechnologyChiyoda‐kuTokyoJapan
| | - Asuka Inoue
- Department of Molecular and Cellular Biochemistry, Graduate School of Pharmaceutical SciencesTohoku UniversitySendaiMiyagiJapan
| | - Hayakazu Sumida
- Department of Dermatology, Faculty of MedicineThe University of TokyoBunkyo‐kuTokyoJapan
| | - Hideya Ando
- Department of Bioscience, Graduate School of Life ScienceOkayama University of ScienceOkayamaJapan
| | - Motonao Nakamura
- Department of Bioscience, Graduate School of Life ScienceOkayama University of ScienceOkayamaJapan
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6
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Qiao L, Liu K, Ren Y, Liu Y, Xu Z, Wang S, Zhang Y. Scutellaria baicalensis ameliorates allergic airway inflammation through agonism and transcriptional regulation of TAS2Rs. JOURNAL OF ETHNOPHARMACOLOGY 2024; 337:118881. [PMID: 39362328 DOI: 10.1016/j.jep.2024.118881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2024] [Revised: 09/18/2024] [Accepted: 09/30/2024] [Indexed: 10/05/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Scutellaria baicalensis Georgi (SCB, Huangqin) is a traditional medicinal plant used to treat fever and respiratory diseases. SCB has a good therapeutic effect on asthma and anti-inflammation in traditional clinic use. However, the molecular mechanism and targets of SCB in treating asthma are still unclear. AIM OF THE STUDY Combining transcriptomic analysis and in vitro experimental validation, this study aimed to reveal the molecular mechanism and targets of SCB in treating asthma. MATERIALS AND METHODS The anti-asthmatic effects of SCB and its active components, scutellarin and oroxylin A, were evaluated in ovalbumin (OVA)-induced rats by analysis of pulmonary function and pathology. The signaling pathways in rat pulmonary tissue were analyzed using transcriptomics and protein interaction network analysis. Calcium mobilization assay and molecular docking were utilized to discover the active compounds from SCB with agonism activity of type 2 taste receptors (TAS2Rs). The anti-asthmatic effect and transcriptional regulation of TAS2Rs regulated by SCB and its active components were analyzed in vitro. RESULTS Extracts of SCB (ESB), scutellarin, and oroxylin A ameliorated airway function and inflammation in OVA-induced rats. The anti-asthma mechanism of ESB, scutellarin and oroxylin A was highly related to immune and taste transduction pathways based on transcriptomic analysis, especially the TAS2Rs signaling pathway. ESB was the direct agonist of TAS2R4 and TAS2R14 with EC50 of 209.1 and 217.2 μg/mL based on calcium mobilization assay, respectively. Baicalein was the main active component for TAS2R4 agonism activity, and scutellarin and oroxylin A had weak agonism activity of TAS2R4 and TAS2R14 through calcium mobilization assay and molecular docking. However, scutellarin and oroxylin A significantly upregulated the gene expression of Tas2r108 (the mouse ortholog of the TAS2R4) in lung tissue. ESB, scutellarin, and oroxylin A inhibited LPS-induced lactate dehydrogenase release and gene expression of TNF through transcriptional regulation of TAS2R4 and TAS2R14 on bronchial epithelial cells. ESB and oroxylin A ameliorated IgE-induced β-hexosaminidase release and gene expression of Il4 and Tnf and upregulated gene expression of Tas2r108. CONCLUSION These results provided new insight into the anti-asthmatic mechanism of SCB and active components, scutellarin and oroxylin A, through agonism and transcriptional regulation of TAS2Rs to ameliorate allergic airway inflammation.
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Affiliation(s)
- Liansheng Qiao
- Key Laboratory of TCM-information Engineer of State Administration of TCM, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 102488, China
| | - Kaiyang Liu
- Key Laboratory of TCM-information Engineer of State Administration of TCM, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 102488, China
| | - Yue Ren
- Key Laboratory of TCM-information Engineer of State Administration of TCM, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 102488, China
| | - Yanxia Liu
- Key Laboratory of TCM-information Engineer of State Administration of TCM, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 102488, China
| | - Zhenzhen Xu
- Key Laboratory of TCM-information Engineer of State Administration of TCM, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 102488, China
| | - Shifeng Wang
- Key Laboratory of TCM-information Engineer of State Administration of TCM, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 102488, China
| | - Yanling Zhang
- Key Laboratory of TCM-information Engineer of State Administration of TCM, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 102488, China.
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7
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Xie J, Wen H, Shi Y, Wei F, Jiang J, Luo L, Zeng L. Exploration of the mechanism of temperature influence on bitter taste of theacrine by activating human bitter taste receptor hTAS2R14. Food Res Int 2024; 193:114857. [PMID: 39160053 DOI: 10.1016/j.foodres.2024.114857] [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: 05/06/2024] [Revised: 07/15/2024] [Accepted: 07/29/2024] [Indexed: 08/21/2024]
Abstract
Theacrine, a purine alkaloid derived from Camellia assamica var. kucha, has a distinct bitter taste. Our previous study found the lower recognition threshold of theacrine at 25 °C than 45 °C. This study aims to investigate the bitterness characterizations of theacrine at aforementioned temperatures and its taste perception mechanism. Sensory analysis exhibited higher bitterness intensity for theacrine at 25 °C than 45 °C. Subsequently, flow cytometry was performed to verify the above characterization at the cellular level. It revealed that theacrine could activated the bitter receptor hTAS2R14 and the calcium signal at 25 °C was higher than 45 °C. Ultimately, the interaction mechanism was studied by molecular dynamics simulations, indicating that the conformation of theacrine-hTAS2R14 had a higher binding capacity and better stability at 25 °C. Overall, temperature affected the binding of theacrine to the bitter receptor hTAS2R14, resulting in the stronger bitterness intensity of theacrine at 25 °C than 45 °C.
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Affiliation(s)
- Jizhou Xie
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, College of Food Science, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Southwest University, Chongqing 400715, China; Chongqing Tea Technology and Innovation Center, China
| | - Haitao Wen
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha 410128, China
| | - Yu Shi
- Modern Logistics of China Railway No.8 Engineering Group CO., LTD, Chengdu 610306, Sichuan, China
| | - Fang Wei
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, College of Food Science, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Southwest University, Chongqing 400715, China; Chongqing Tea Technology and Innovation Center, China
| | - Jielin Jiang
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, College of Food Science, Southwest University, Chongqing 400715, China; Dayi Tea Group Menghai Tea Factory Co., Yunnan 666100, China
| | - Liyong Luo
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, College of Food Science, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Southwest University, Chongqing 400715, China; Chongqing Tea Technology and Innovation Center, China.
| | - Liang Zeng
- Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City, College of Food Science, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Southwest University, Chongqing 400715, China; Chongqing Tea Technology and Innovation Center, China.
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Wang Q, Farhadipour M, Thijs T, Ruilova Sosoranga E, Van der Schueren B, Ceulemans LJ, Deleus E, Lannoo M, Tack J, Depoortere I. Bitter-tasting drugs tune GDF15 and GLP-1 expression via bitter taste or motilin receptors in the intestine of patients with obesity. Mol Metab 2024; 88:102002. [PMID: 39111389 PMCID: PMC11380393 DOI: 10.1016/j.molmet.2024.102002] [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: 06/26/2024] [Revised: 08/01/2024] [Accepted: 08/01/2024] [Indexed: 08/22/2024] Open
Abstract
OBJECTIVE Growth differentiation factor 15 (GDF15), a stress related cytokine, was recently identified as a novel satiety signal acting via the GFRAL receptor located in the hindbrain. Bitter compounds are known to induce satiety via the release of glucagon-like peptide 1 (GLP-1) through activation of bitter taste receptors (TAS2Rs, 25 subtypes) on enteroendocrine cells in the gut. This study aimed to investigate whether and how bitter compounds induce a stress response in intestinal epithelial cells to affect GDF15 expression in patients with obesity, thereby facilitating satiety signaling from the gut. METHODS The acute effect of oral intake of the bitter-containing medication Plaquenil (hydroxychloroquine sulfate) on plasma GDF15 levels was evaluated in a placebo-controlled, double-blind, randomized, two-visit crossover study in healthy volunteers. Primary crypts isolated from the jejunal mucosa from patients with obesity were stimulated with vehicle or bitter compounds, and the effect on GDF15 expression was evaluated using RT-qPCR or ELISA. Immunofluorescence colocalization studies were performed between GDF15, epithelial cell type markers and TAS2Rs. The role of TAS2Rs was tested by 1) pretreatment with a TAS2R antagonist, GIV3727; 2) determining TAS2R4/43 polymorphisms that affect taste sensitivity to TAS2R4/43 agonists. RESULTS Acute intake of hydroxychloroquine sulfate increased GDF15 plasma levels, which correlated with reduced hunger scores and plasma ghrelin levels in healthy volunteers. This effect was mimicked in primary jejunal cultures from patients with obesity. GDF15 was expressed in enteroendocrine and goblet cells with higher expression levels in patients with obesity. Various bitter-tasting compounds (medicinal, plant extracts, bacterial) either increased or decreased GDF15 expression, with some also affecting GLP-1. The effect was mediated by specific intestinal TAS2R subtypes and the unfolded protein response pathway. The bitter-induced effect on GDF15/GLP-1 expression was influenced by the existence of TAS2R4 amino acid polymorphisms and TAS2R43 deletion polymorphisms that may predict patient's therapeutic responsiveness. However, the effect of the bitter-tasting antibiotic azithromycin on GDF15 release was mediated via the motilin receptor, possibly explaining some of its aversive side effects. CONCLUSIONS Bitter chemosensory and pharmacological receptors regulate the release of GDF15 from human gut epithelial cells and represent potential targets for modulating metabolic disorders or cachexia.
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Affiliation(s)
- Qian Wang
- Gut Peptide Research Lab, Translational Research for Gastrointestinal Disorders (TARGID), KU Leuven, Leuven, Belgium
| | - Mona Farhadipour
- Gut Peptide Research Lab, Translational Research for Gastrointestinal Disorders (TARGID), KU Leuven, Leuven, Belgium
| | - Theo Thijs
- Gut Peptide Research Lab, Translational Research for Gastrointestinal Disorders (TARGID), KU Leuven, Leuven, Belgium
| | | | - Bart Van der Schueren
- Department of Endocrinology, University Hospitals Leuven, Leuven, Belgium; Laboratory of Clinical and Experimental Endocrinology, University of Leuven, Leuven, Belgium
| | - Laurens J Ceulemans
- Leuven Intestinal Failure and Transplantation (LIFT) Center, University Hospitals Leuven, Leuven, Belgium
| | - Ellen Deleus
- Department of Abdominal Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Matthias Lannoo
- Department of Abdominal Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Jan Tack
- Translational Research for Gastrointestinal Disorders (TARGID), KU Leuven, Leuven, Belgium; Department of Gastroenterology and Hepatology, University Hospitals Leuven, Leuven, Belgium
| | - Inge Depoortere
- Gut Peptide Research Lab, Translational Research for Gastrointestinal Disorders (TARGID), KU Leuven, Leuven, Belgium.
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9
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Trius-Soler M, Moreno JJ. Bitter taste receptors: Key target to understand the effects of polyphenols on glucose and body weight homeostasis. Pathophysiological and pharmacological implications. Biochem Pharmacol 2024; 228:116192. [PMID: 38583811 DOI: 10.1016/j.bcp.2024.116192] [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: 01/19/2024] [Revised: 03/22/2024] [Accepted: 04/04/2024] [Indexed: 04/09/2024]
Abstract
Experimental and clinical research has reported beneficial effects of polyphenol intake on high prevalent diseases such as type 2 diabetes and obesity. These phytochemicals are ligands of taste 2 receptors (T2Rs) that have been recently located in a variety of organs and extra-oral tissues. Therefore, the interaction between polyphenol and T2Rs in brain structures can play a direct effect on appetite/satiety regulation and food intake. T2Rs are also expressed along the digestive tract, and their interaction with polyphenols can induce the release of gastrointestinal hormones (e.g., ghrelin, GLP-1, CCK) influencing appetite, gastrointestinal functionally, and glycemia control. Intestinal microbiota can also influence on network effects of polyphenols-T2Rs interaction and vice versa, impacting innate immune responses and consequently on gut functionally. Furthermore, polyphenols binding to T2Rs present important effects on adipose tissue metabolism. Interestingly, T2R polymorphism could, at least partially, explain the inter-individual variability of the effects of polyphenols on glucose and body weight homeostasis. Together, these factors can contribute to understand the beneficial effects of polyphenol-rich diets but also might aid in identifying new pharmacological pathway targets for the treatment of diabetes and obesity.
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Affiliation(s)
- Marta Trius-Soler
- Department of Public Health and Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Juan José Moreno
- Department of Nutrition, Food Science and Gastronomy, XIA, School of Pharmacy and Food Sciences, University of Barcelona, Barcelona, Spain; Institute for Nutrition and Food Safety Research, University of Barcelona, Barcelona, Spain; Consorcio CIBER, M.P. Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain.
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10
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Tao L, Wang D, Yuan Q, Zhao F, Zhang Y, Du T, Shen S, Xu HE, Li Y, Yang D, Duan J. Bitter taste receptor TAS2R14 activation and G protein assembly by an intracellular agonist. Cell Res 2024; 34:735-738. [PMID: 38969802 PMCID: PMC11442968 DOI: 10.1038/s41422-024-00995-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Accepted: 06/23/2024] [Indexed: 07/07/2024] Open
Affiliation(s)
- Lele Tao
- Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan, Guangdong, China
| | - Dongxue Wang
- Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan, Guangdong, China
| | - Qingning Yuan
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Fenghui Zhao
- State Key Laboratory of Chemical Biology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Yu Zhang
- Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan, Guangdong, China
| | - Tianyuan Du
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China
| | - Shiyi Shen
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - H Eric Xu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China.
| | - Yi Li
- Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan, Guangdong, China.
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.
| | - Dehua Yang
- State Key Laboratory of Chemical Biology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.
| | - Jia Duan
- Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan, Guangdong, China.
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.
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11
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Huang P, Liu Y, Cai L, Cui C. Investigation of the multiple taste enhancement properties of N-succinyl-amino acids and their relationship to chemical structure using dynamic sensory techniques. Food Chem 2024; 453:139661. [PMID: 38772310 DOI: 10.1016/j.foodchem.2024.139661] [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: 04/09/2024] [Revised: 05/07/2024] [Accepted: 05/11/2024] [Indexed: 05/23/2024]
Abstract
The present study aimed to explore the similarity and difference in taste enhancement properties of N-succinyl-L-phenylalanine (N-Suc-Phe), N-succinyl-L-tryptophan (N-Suc-Trp), and N-succinyl-L-tyrosine (N-Suc-Tyr) using temporal dominance of sensations (TDS), temporal check-all-that-apply (TCATA), and time-intensity (TI) techniques. Meanwhile, leading taste enhancers in the market, such as N'-[(2,4-dimethoxyphenyl)methyl]-N-(2-pyridin-2-ylethyl) oxamide (DE) was chosen to conduct a comparative analysis with the aforementioned three compounds. Findings from TDS and TCATA revealed that all compounds under investigation notably enhanced umami and saltiness while reducing bitterness in a concentration-dependent fashion (0.25-1 mg/L). Additionally, the TI results indicated that the duration of umami was extended by 50-75%, and the duration of bitterness was decreased by 20-40% upon addition of DE, N-Suc-Phe, N-Suc-Trp, and N-Suc-Tyr (1 mg/L). Among these, N-Suc-Trp was identified as the most effective in augmenting umami and mitigating bitterness, whereas N-Suc-Tyr excelled in enhancing saltiness intensity. Partial least squares regression (PLSR) pinpointed the carbon‑carbon double bond as the important structure influencing the enhancement of umami and reduction of bitterness, whereas the phenolic hydroxyl group was identified as critical for enhancing saltiness. This investigation provided insights into the different characteristics of taste enhancement of N-Suc-AAs and the impact of chemical structure on such specificity.
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Affiliation(s)
- Pimiao Huang
- School of Food Science and Engineering, South China University of Technology, Wushan Road 381, 510640 Guangzhou, Guangdong, China
| | - Ying Liu
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Lei Cai
- School of Food Science and Engineering, South China University of Technology, Wushan Road 381, 510640 Guangzhou, Guangdong, China
| | - Chun Cui
- School of Food Science and Engineering, South China University of Technology, Wushan Road 381, 510640 Guangzhou, Guangdong, China.
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12
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Sterneder S, Seitz J, Kiefl J, Rottmann E, Liebig M, Blings M, Seilwind S, Zhou Y, Wei J, Guan H, Zhu Q, Kreißl J, Lamottke K, Ley JP, Somoza V. Identification of 4'-Demethyl-3,9-dihydroeucomin as a Bitter-Masking Compound from the Resin of Daemonorops draco. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:20991-20999. [PMID: 39277814 PMCID: PMC11440488 DOI: 10.1021/acs.jafc.4c04583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/17/2024]
Abstract
Masking the bitter taste of foods is one of the key strategies to improve their taste and palatability, particularly in the context of clean labeling, where natural compounds are preferred. Despite the demand, the availability of natural bitter-masking compounds remains limited. Here, we identified the bitter-masking compound 4'-demethyl-3,9-dihydroeucomin (DMDHE) isolated from the resin of Daemonorops draco by means of an activity-guided in vivo (sensory bitterness rating of quinine) and in vitro (cell-based bitter response assays) approach. First, a mean bitter-masking effect of -29.6 ± 6.30% on the bitterness perceived from quinine [10 ppm] was demonstrated for an organic solvent extract of the resin of D. draco (= DD [500 ppm]) in a sensory trial. The results were verified in a cell-based bitter assay in which the bitter taste receptor (TAS2R)-dependent proton secretion serves as an outcome measure of the cellular bitter response in parietal HGT-1 cells. By means of preparative RP-18 high-performance liquid chromatography (HPLC) analysis combined with activity-guided sensory evaluations, the most potent bitter-masking fractions were identified. Subsequent quantitative liquid chromatography/high-resolution mass spectrometry/charged aerosol detection/ultraviolet (LC-HRMS/CAD/UV), NMR analysis, followed by gram-scale synthesis, led to the characterization of DMDHE as bitter-masking homoisoflavanone. DMDHE decreased the sensory bitterness of quinine by 14.8 ± 5.00%. Functional involvement of TAS2R14 was demonstrated by means of a CRISPR-Cas9 approach, which revealed a reduction of the DMDHE-evoked bitter-masking effect by 40.4 ± 9.32% in HGT-1 TAS2R14ko versus HGT-1 wt cells.
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Affiliation(s)
- Sonja Sterneder
- Department of Physiological Chemistry, Faculty of Chemistry, University of Vienna, 1090 Vienna, Austria
- Vienna Doctoral School in Chemistry (DoSChem), Faculty of Chemistry, University of Vienna, 1090 Vienna, Austria
- Leibniz Institute for Food Systems Biology, Technical University of Munich, 85354 Freising, Germany
| | - Joachim Seitz
- Department of Physiological Chemistry, Faculty of Chemistry, University of Vienna, 1090 Vienna, Austria
| | | | | | | | | | | | - Yijun Zhou
- Bicoll Biotechnology (Shanghai) Co., Ltd., 201203 Pudong, China
| | - Jianbing Wei
- Bicoll Biotechnology (Shanghai) Co., Ltd., 201203 Pudong, China
| | - Haifeng Guan
- Bicoll Biotechnology (Shanghai) Co., Ltd., 201203 Pudong, China
| | - Qianjin Zhu
- Bicoll Biotechnology (Shanghai) Co., Ltd., 201203 Pudong, China
| | - Johanna Kreißl
- Leibniz Institute for Food Systems Biology, Technical University of Munich, 85354 Freising, Germany
| | - Kai Lamottke
- Bicoll Biotechnology (Shanghai) Co., Ltd., 201203 Pudong, China
- Bicoll GmbH, 82152 Planegg/Martinsried, Germany
| | | | - Veronika Somoza
- Department of Physiological Chemistry, Faculty of Chemistry, University of Vienna, 1090 Vienna, Austria
- Leibniz Institute for Food Systems Biology, Technical University of Munich, 85354 Freising, Germany
- Chair of Nutritional Systems Biology, TUM School of Life Sciences, Technical University of Munich, 85354 Freising, Germany
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13
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Harris JC, Lee RJ, Carey RM. Extragustatory bitter taste receptors in head and neck health and disease. J Mol Med (Berl) 2024:10.1007/s00109-024-02490-0. [PMID: 39317733 DOI: 10.1007/s00109-024-02490-0] [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: 07/03/2024] [Revised: 08/30/2024] [Accepted: 09/17/2024] [Indexed: 09/26/2024]
Abstract
Taste receptors, first described for their gustatory functions within the oral cavity and oropharynx, are now known to be expressed in many organ systems. Even intraoral taste receptors regulate non-sensory pathways, and recent literature has connected bitter taste receptors to various states of health and disease. These extragustatory pathways involve previously unexplored, clinically relevant roles for taste signaling in areas including susceptibility to infection, antibiotic efficacy, and cancer outcomes. Among other physicians, otolaryngologists who manage head and neck diseases should be aware of this growing body of evidence and its relevance to their fields. In this review, we describe the role of extragustatory taste receptors in head and neck health and disease, highlighting recent advances, clinical implications, and directions for future investigation. Additionally, this review will discuss known TAS2R polymorphisms and the associated implications for clinical prognosis.
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Affiliation(s)
- Jacob C Harris
- Department of Otorhinolaryngology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Robert J Lee
- Department of Otorhinolaryngology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
- Department of Physiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Ryan M Carey
- Department of Otorhinolaryngology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA.
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14
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Mohammadpour Z, Heshmati E, Heilbronn LK, Hendrie GA, Brooker PG, Page AJ. The effect of post-oral bitter compound interventions on the postprandial glycemia response: A systematic review and meta-analysis of randomised controlled trials. Clin Nutr 2024; 43:31-45. [PMID: 39317085 DOI: 10.1016/j.clnu.2024.09.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 09/05/2024] [Accepted: 09/11/2024] [Indexed: 09/26/2024]
Abstract
BACKGROUND & AIMS The post-oral sensing of bitter compounds by a family of bitter taste receptors (TAS2Rs) is suggested to regulate postprandial glycemia in humans. However, reports are inconsistent. This systematic review used meta-analysis to synthesise the impact of bitter compound interventions on the postprandial glycaemic response in humans. METHODS Electronic databases (Medline, PubMed, and Web of Science) were systematically searched from inception to April 2024 to identify randomised controlled trials reporting the effect of interventions utilising post-oral bitter compounds vs. placebo on postprandial plasma glucose levels at t = 2 h (2 h-PPG), and area under the curve (AUC) of glucose, insulin, and c-peptide. The random-effect and subgroup analysis were performed to calculate pooled weighted mean differences (WMD), overall and by predefined criteria. RESULTS Forty-six studies (within 34 articles) were identified; 29 and 17 studies described chronic and acute interventions, respectively. The chronic interventions reduced 2 h-PPG (n = 21, WMD = -0.35 mmol/L, 95%CIs = -0.58, -0.11) but not AUC for glucose or insulin. Subgroup analysis showed the former was particularly evident in individuals with impaired glycemia, interventions longer than three months, or quinine family administration. The acute interventions did not improve the postprandial glycemia response, but subgroup analysis revealed a decrease in AUC-glucose after quinine family administration (n = 4 WMD = -90.40 (nmol × time/L), 95%CIs = -132.70, -48.10). CONCLUSION Chronic bitter compound interventions, particularly those from the quinine family, may have therapeutic potential in those with glycemia dysregulation. Acute intervention of the quinine family may also improve postprandial glucose. Given the very low quality of the evidence, further investigations with more rigorous methods are still required.
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Affiliation(s)
- Zinat Mohammadpour
- School of Biomedicine, University of Adelaide, Adelaide, SA 5005, Australia; College of Medicine and Dentistry, James Cook University, Cairns, QLD 4878, Australia
| | - Elaheh Heshmati
- School of Biomedicine, University of Adelaide, Adelaide, SA 5005, Australia; Nutrition, Diabetes and Gut Health, Lifelong Health Theme, SAHMRI, SA 5000, Australia
| | - Leonie K Heilbronn
- School of Biomedicine, University of Adelaide, Adelaide, SA 5005, Australia; Nutrition, Diabetes and Gut Health, Lifelong Health Theme, SAHMRI, SA 5000, Australia
| | - Gilly A Hendrie
- Health and Biosecurity, Commonwealth Scientific and Industrial Research Organisation (CSIRO), Adelaide 5000, Australia
| | - Paige G Brooker
- Health and Biosecurity, Commonwealth Scientific and Industrial Research Organisation (CSIRO), Adelaide 5000, Australia
| | - Amanda J Page
- School of Biomedicine, University of Adelaide, Adelaide, SA 5005, Australia; Nutrition, Diabetes and Gut Health, Lifelong Health Theme, SAHMRI, SA 5000, Australia.
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15
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Marinho AH, da Silva JM, Brandão VFDN, Jatobá SG, Júnior PB, Ataide-Silva T, Sousa FADB, Bastos-Silva VJ, de Araujo GG. Caffeine Mouth Rinse Plus Ingestion Improves the 10-Km Time Trial Compared to Caffeine Mouth Rinse Alone. RESEARCH QUARTERLY FOR EXERCISE AND SPORT 2024; 95:617-624. [PMID: 38271741 DOI: 10.1080/02701367.2023.2293121] [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: 05/06/2022] [Accepted: 09/12/2023] [Indexed: 01/27/2024]
Abstract
Background: The benefits of caffeine to physical performance have been extensively demonstrated, however, it has recently been speculated that there is an effect of the administration route on its effectiveness. Purpose: The current study investigated the effect of caffeine mouth rinse in isolation or combined with ingestion on performance in a 30-minute constant-load exercise followed by a 10-km cycling time trial. Methods: Ten physically active men performed a 30-minute constant-load exercise at 50% of the graded test Wmax, followed by a 10-km cycling time trial. Before and at the middle points of the constant-load exercise and 10-km cycling time trial, the following conditions were administered: PLA (cellulose ingestion plus mouth rinsing with magnesium sulfate), ING (5 mg.kg-1 of caffeine ingestion plus mouth rinsing with magnesium sulfate), MR (cellulose ingestion plus mouth rinsing with 1.2% caffeine), and COMB (5 mg.kg-1 of caffeine ingestion plus mouth rinsing with 1.2% caffeine). Results: During the 30-minute constant-load exercise, COMB presented a lower rating of perceived exertion (RPE) than MR (p = .04). For the 10-km time trial, the COMB was faster than MR (MR = 1363 ± 345 vs. COMB = 1291 ± 308s, Δ% = 5.57, p = .05). Mean power output was higher in COMB than PLA, ING, and MR (234 ± 15 vs. 169 ± 29, 148 ± 11, and 145 ± 12 W, respectively). There were no differences between conditions for heart rate and RPE during the 10-km time trial. Conclusion: In summary, caffeine mouth rinsing potentiated the effects of caffeine ingestion during the 10-km time trial compared to caffeine mouth rinsing alone.
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Affiliation(s)
- Alisson Henrique Marinho
- Federal University of Alagoas
- Federal University of Parana
- Federal University of Technology Parana
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16
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Walker E, Lo K, Gopal P. Gastrointestinal delivery of bitter hop extract reduces appetite and food cravings in healthy adult women undergoing acute fasting. OBESITY PILLARS 2024; 11:100117. [PMID: 39071168 PMCID: PMC11279280 DOI: 10.1016/j.obpill.2024.100117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/14/2024] [Revised: 06/18/2024] [Accepted: 06/18/2024] [Indexed: 07/30/2024]
Abstract
Background Dietary restrictions or reductions such as fasting for weight loss are often difficult to adhere to due to increased appetite and food cravings. Recently, gastrointestinal delivery of bitter hops has been shown to be effective at reducing appetite in men. Our aim was to determine the effect of a bitter hop extract on appetite and cravings in women, using a 24 h, water-only fast. Methods This was a randomized, double-blind, cross-over treatment study. Thirty adult women were recruited and required to fast for 24 h from 1800 h to 1800 h on three occasions and given an ad libitum meal to break each fast. Treatments of either a placebo or one of two doses (high dose; HD: 250 mg or low dose; LD: 125 mg) of a bitter hop-based appetite suppressant (Amarasate®) were given twice per day at 16 and 20 h into the fast. Results The HD and LD treatment groups exhibited a significant (p < 0.05) reduction in appetite and cravings for food when compared to the placebo control. Two participants reported loose stools and one reported heartburn while on the HD treatment, and one participant reported loose stools while on the LD treatment. Conclusion These data suggest that appetite suppressant co-therapy may be useful in reducing hunger during fasting in women and shows that gastrointestinal delivery of bitter compounds may also be an effective method of reducing cravings for food.This trial received ethical approval from the Northen B New Zealand Human Disability and Ethics committee (Northern B Health and Disability Ethics Committee (2022 EXP 10995) and was prospectively registered with the Australian New Zealand Clinical Trial Registry (ACTRN12622000107729).
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Affiliation(s)
- Edward Walker
- The New Zealand Institute for Plant and Food Research Limited, Mt Albert Research Centre, 120 Mt Albert Road, Mt Albert, Auckland, 1025, New Zealand
| | - Kim Lo
- The New Zealand Institute for Plant and Food Research Limited, Mt Albert Research Centre, 120 Mt Albert Road, Mt Albert, Auckland, 1025, New Zealand
| | - Pramod Gopal
- The New Zealand Institute for Plant and Food Research Limited, Palmerston North, New Zealand
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17
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Flammer LJ, Ellis H, Rivers N, Caronia L, Ghidewon MY, Christensen CM, Jiang P, Breslin PAS, Tordoff MG. Topical application of a P2X2/P2X3 purine receptor inhibitor suppresses the bitter taste of medicines and other taste qualities. Br J Pharmacol 2024; 181:3282-3299. [PMID: 38745397 DOI: 10.1111/bph.16411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 04/01/2024] [Accepted: 04/05/2024] [Indexed: 05/16/2024] Open
Abstract
BACKGROUND AND PURPOSE Many medications taste intensely bitter. The innate aversion to bitterness affects medical compliance, especially in children. There is a clear need to develop bitter blockers to suppress the bitterness of vital medications. Bitter taste is mediated by TAS2R receptors. Because different pharmaceutical compounds activate distinct sets of TAS2Rs, targeting specific receptors may only suppress bitterness for certain, but not all, bitter-tasting compounds. Alternative strategies are needed to identify universal bitter blockers that will improve the acceptance of every medication. Taste cells in the mouth transmit signals to afferent gustatory nerve fibres through the release of ATP, which activates the gustatory nerve-expressed purine receptors P2X2/P2X3. We hypothesized that blocking gustatory nerve transmission with P2X2/P2X3 inhibitors (e.g. 5-(5-iodo-4-methoxy-2-propan-2-ylphenoxy)pyrimidine-2,4-diamine [AF-353]) would reduce bitterness for all medications and bitter compounds. EXPERIMENTAL APPROACH Human sensory taste testing and mouse behavioural analyses were performed to determine if oral application of AF-353 blocks perception of bitter taste and other taste qualities but not non-gustatory oral sensations (e.g. tingle). KEY RESULTS Rinsing the mouth with AF-353 in humans or oral swabbing it in mice suppressed the bitter taste and avoidance behaviours of all compounds tested. We further showed that AF-353 suppressed other taste qualities (i.e. salt, sweet, sour and savoury) but had no effects on other oral or nasal sensations (e.g, astringency and oral tingle). CONCLUSION AND IMPLICATIONS This is the first time a universal, reversible taste blocker in humans has been reported. Topical application of P2X2/P2X3 inhibitor to suppress bitterness may improve medical compliance.
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Affiliation(s)
- Linda J Flammer
- Monell Chemical Senses Center, Philadelphia, Pennsylvania, USA
| | - Hillary Ellis
- Monell Chemical Senses Center, Philadelphia, Pennsylvania, USA
| | - Natasha Rivers
- Monell Chemical Senses Center, Philadelphia, Pennsylvania, USA
| | - Lauren Caronia
- Monell Chemical Senses Center, Philadelphia, Pennsylvania, USA
| | - Misgana Y Ghidewon
- Monell Chemical Senses Center, Philadelphia, Pennsylvania, USA
- University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | | | - Peihua Jiang
- Monell Chemical Senses Center, Philadelphia, Pennsylvania, USA
| | - Paul A S Breslin
- Monell Chemical Senses Center, Philadelphia, Pennsylvania, USA
- Department of Nutritional Sciences, Rutgers University, New Brunswick, New Jersey, USA
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Li J, Wang X, Zhang H, Hu X, Peng X, Jiang W, Zhuo L, Peng Y, Zeng G, Wang Z. Fenamates: Forgotten treasure for cancer treatment and prevention: Mechanisms of action, structural modification, and bright future. Med Res Rev 2024. [PMID: 39171404 DOI: 10.1002/med.22079] [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: 12/13/2022] [Revised: 08/03/2024] [Accepted: 08/08/2024] [Indexed: 08/23/2024]
Abstract
Fenamates as classical nonsteroidal anti-inflammatory agents are widely used for relieving pain. Preclinical studies and epidemiological data highlight their chemo-preventive and chemotherapeutic potential for cancer. However, comprehensive reviews of fenamates in cancer are limited. To accelerate the repurposing of fenamates, this review summarizes the results of fenamates alone or in combination with existing chemotherapeutic agents. This paper also explores targets of fenamates in cancer therapy, including COX, AKR family, AR, gap junction, FTO, TEAD, DHODH, TAS2R14, ion channels, and DNA. Besides, this paper discusses other mechanisms, such as regulating Wnt/β-catenin, TGF-β, p38 MAPK, and NF-κB pathway, and the regulation of the expressions of Sp, EGR-1, NAG-1, ATF-3, ErbB2, AR, as well as the modulation of the tumor immune microenvironment. Furthermore, this paper outlined the structural modifications of fenamates, highlighting their potential as promising leads for anticancer drugs.
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Affiliation(s)
- Junfang Li
- School of Pharmacy, Lanzhou University, Lanzhou, Gansu, China
| | - Xiaodong Wang
- School of Pharmacy, Lanzhou University, Lanzhou, Gansu, China
| | - Honghua Zhang
- School of Pharmacy, Lanzhou University, Lanzhou, Gansu, China
| | - Xiaoling Hu
- School of Pharmacy, Lanzhou University, Lanzhou, Gansu, China
| | - Xue Peng
- School of Pharmaceutical Science, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Weifan Jiang
- Postdoctoral Station for Basic Medicine, School of Basic Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The Affiliated Nanhua Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Linsheng Zhuo
- School of Pharmaceutical Science, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- Postdoctoral Station for Basic Medicine, School of Basic Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Yan Peng
- School of Pharmaceutical Science, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Guo Zeng
- Postdoctoral Station for Basic Medicine, School of Basic Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Zhen Wang
- School of Pharmaceutical Science, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- Postdoctoral Station for Basic Medicine, School of Basic Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan, China
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19
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Wang P, Li H, Wang Y, Dong F, Li H, Gui X, Ren Y, Gao X, Li X, Liu R. One of the major challenges of masking the bitter taste in medications: an overview of quantitative methods for bitterness. Front Chem 2024; 12:1449536. [PMID: 39206439 PMCID: PMC11349634 DOI: 10.3389/fchem.2024.1449536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2024] [Accepted: 07/29/2024] [Indexed: 09/04/2024] Open
Abstract
Objective The aim of the present study was to carry out a systematic research on bitterness quantification to provide a reference for scholars and pharmaceutical developers to carry out drug taste masking research. Significance: The bitterness of medications poses a significant concern for clinicians and patients. Scientifically measuring the intensity of drug bitterness is pivotal for enhancing drug palatability and broadening their clinical utility. Methods The current study was carried out by conducting a systematic literature review that identified relevant papers from indexed databases. Numerous studies and research are cited and quoted in this article to summarize the features, strengths, and applicability of quantitative bitterness assessment methods. Results In our research, we systematically outlined the classification and key advancements in quantitative research methods for assessing drug bitterness, including in vivo quantification techniques such as traditional human taste panel methods, as well as in vitro quantification methods such as electronic tongue analysis. It focused on the quantitative methods and difficulties of bitterness of natural drugs with complex system characteristics and their difficulties in quantification, and proposes possible future research directions. Conclusion The quantitative methods of bitterness were summarized, which laid an important foundation for the construction of a comprehensive bitterness quantification standard system and the formulation of accurate, efficient and rich taste masking strategies.
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Affiliation(s)
- Panpan Wang
- Department of Pharmacy, The First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, China
| | - Haiyang Li
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, China
| | - Yanli Wang
- Department of Pharmacy, The First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, China
| | - Fengyu Dong
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, China
| | - Han Li
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, China
| | - Xinjing Gui
- Department of Pharmacy, The First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, China
- Henan Province Engineering Research Center for Clinical Application, Evaluation and Transformation of Traditional Chinese Medicine, Henan Province Engineering Laboratory for Clinical Evaluation Technology of Chinese Medicine, Zhengzhou, China
- Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases Co-Constructed by Henan Province, Education Ministry of China, Henan University of Chinese Medicine, Zhengzhou, China
| | - Yanna Ren
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, China
| | - Xiaojie Gao
- Zhengzhou Traditional Chinese Medicine Hospital, Zhengzhou, China
| | - Xuelin Li
- Department of Pharmacy, The First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, China
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, China
- Henan Province Engineering Research Center for Clinical Application, Evaluation and Transformation of Traditional Chinese Medicine, Henan Province Engineering Laboratory for Clinical Evaluation Technology of Chinese Medicine, Zhengzhou, China
- Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases Co-Constructed by Henan Province, Education Ministry of China, Henan University of Chinese Medicine, Zhengzhou, China
- Third Level Laboratory of Traditional Chinese Medicine Preparations of the State Administration of Traditional Chinese Medicine, Zhengzhou, China
| | - Ruixin Liu
- Department of Pharmacy, The First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, China
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, China
- Henan Province Engineering Research Center for Clinical Application, Evaluation and Transformation of Traditional Chinese Medicine, Henan Province Engineering Laboratory for Clinical Evaluation Technology of Chinese Medicine, Zhengzhou, China
- Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases Co-Constructed by Henan Province, Education Ministry of China, Henan University of Chinese Medicine, Zhengzhou, China
- Third Level Laboratory of Traditional Chinese Medicine Preparations of the State Administration of Traditional Chinese Medicine, Zhengzhou, China
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20
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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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21
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Belloir C, Karolkowski A, Thomas A, Menin R, Briand L. Modulation of bitter taste receptors by yeast extracts. Food Res Int 2024; 190:114596. [PMID: 38945612 DOI: 10.1016/j.foodres.2024.114596] [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: 03/27/2024] [Revised: 05/21/2024] [Accepted: 06/01/2024] [Indexed: 07/02/2024]
Abstract
Yeast extracts (YEs) are used in foods because of their flavour properties and ability to reduce bitterness. The adenosine 5'-monophosphate (AMP) found in YEs is known to decrease the bitterness of some compounds. This study aimed to investigate the ability of YEs to inhibit bitter taste receptors (TAS2Rs) using in vitro cell-based assays. A screen of TAS2Rs activated by AMP and YEs revealed that AMP and the AMP-rich YE activated more TAS2Rs. The inhibitory effect of the AMP-rich YE on seven TAS2Rs activated by bitter agonists was studied. YE reduced TAS2R activation, increased the EC50 value and decreased the maximum amplitude, demonstrating competitive and non-competitive inhibitions. Amongst the nineteen TAS2Rs tested, seven showed 40 % or greater inhibition after treatment of AMP-rich YE. Our data provide a better understanding of the TAS2R inhibition mechanism of AMP-rich YEs and promote their use as a strategy to reduce bitterness in foods and medicines.
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Affiliation(s)
- Christine Belloir
- Centre des Sciences du Goût et de l'Alimentation, CNRS, INRAE, Institut Agro, Université de Bourgogne, F-21000 Dijon, France.
| | - Adeline Karolkowski
- Centre des Sciences du Goût et de l'Alimentation, CNRS, INRAE, Institut Agro, Université de Bourgogne, F-21000 Dijon, France.
| | | | - Rudy Menin
- Biospringer by Lesaffre, 94700 Maisons-Alfort, France.
| | - Loïc Briand
- Centre des Sciences du Goût et de l'Alimentation, CNRS, INRAE, Institut Agro, Université de Bourgogne, F-21000 Dijon, France.
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22
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Gu YP, Wang JM, Tian S, Gu PP, Duan JY, Gou LS, Liu YW. Activation of TAS2R4 signaling attenuates podocyte injury induced by high glucose. Biochem Pharmacol 2024; 226:116392. [PMID: 38942091 DOI: 10.1016/j.bcp.2024.116392] [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: 01/29/2024] [Revised: 05/27/2024] [Accepted: 06/25/2024] [Indexed: 06/30/2024]
Abstract
Bitter taste receptors (TAS2Rs) Tas2r108 gene possesses a high abundance in mouse kidney; however, the biological functions of Tas2r108 encoded receptor TAS2Rs member 4 (TAS2R4) are still unknown. In the present study, we found that mouse TAS2R4 (mTAS2R4) signaling was inactivated in chronic high glucose-stimulated mouse podocyte cell line MPC, evidenced by the decreased protein expressions of mTAS2R4 and phospholipase C β2 (PLCβ2), a key downstream molecule of mTAS2R4 signaling. Nonetheless, agonism of mTAS2R4 by quinine recovered mTAS2R4 and PLCβ2 levels, and increased podocyte cell viability as well as protein expressions of ZO-1 and nephrin, biomarkers of podocyte slit diaphragm, in high glucose-cultured MPC cells. However, blockage of mTAS2R4 signaling with mTAS2R4 blockers γ-aminobutyric acid and abscisic acid, a Gβγ inhibitor Gallein, or a PLCβ2 inhibitor U73122 all abolished the effects of quinine on NLRP3 inflammasome and p-NF-κB p65 as well as the functional podocyte proteins in MPC cells in a high glucose condition. Furthermore, knockdown of mTAS2R4 with lentivirus-carrying Tas2r108 shRNA also ablated the effect of quinine on the key molecules of the above inflammatory signalings and podocyte functions in high glucose-cultured MPC cells. In summary, we demonstrated that activation of TAS2R4 signaling alleviated the podocyte injury caused by chronic high glucose, and inhibition of NF-κB p65 and NLRP3 inflammasome mediated the protective effects of TAS2R4 activation on podocytes. Moreover, activation of TAS2R4 signaling could be an important strategy for prevention and treatment of diabetic kidney disease.
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Affiliation(s)
- Yan-Ping Gu
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou 221004, Jiangsu, China
| | - Jiang-Meng Wang
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou 221004, Jiangsu, China
| | - Sai Tian
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou 221004, Jiangsu, China
| | - Pan-Pan Gu
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou 221004, Jiangsu, China
| | - Jing-Yu Duan
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou 221004, Jiangsu, China
| | - Ling-Shan Gou
- Center for Genetic Medicine, Xuzhou Maternity and Child Health Care Hospital, Xuzhou 221009, Jiangsu, China
| | - Yao-Wu Liu
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou 221004, Jiangsu, China; Department of Pharmacology, School of Pharmacy, Xuzhou Medical University, Xuzhou 221004, Jiangsu, China.
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23
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Czech C, Lang T, Graßl A, Steuer A, Di Pizio A, Behrens M, Lang R. Identification of mozambioside roasting products and their bitter taste receptor activation. Food Chem 2024; 446:138884. [PMID: 38432139 DOI: 10.1016/j.foodchem.2024.138884] [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: 11/23/2023] [Revised: 02/07/2024] [Accepted: 02/25/2024] [Indexed: 03/05/2024]
Abstract
Arabica coffee contains the bitter-tasting diterpene glycoside mozambioside, which degrades during coffee roasting, leading to yet unknown structurally related degradation products with possibly similar bitter-receptor-activating properties. The study aimed at the generation, isolation, and structure elucidation of individual pyrolysis products of mozambioside and characterization of bitter receptor activation by in vitro analysis in HEK 293T-Gα16gust44 cells. The new compounds 17-O-β-d-glucosyl-11-hydroxycafestol-2-on, 11-O-β-d-glucosyl-16-desoxycafestol-2-on, 11-O-β-d-glucosyl-(S)-16-desoxy-17-oxocafestol-2-on, 11-O-β-d-glucosyl-15,16-dehydrocafestol-2-on, and 11-O-β-d-glucosyl-(R)-16-desoxy-17-oxocafestol-2-on were isolated from pyrolyzed mozambioside by HPLC and identified by NMR and UHPLC-ToF-MS. Roasting products 11-O-β-d-glucosyl-(S)-16-desoxy-17-oxocafestol-2-on, 11-O-β-d-glucosyl-15,16-dehydrocafestol-2-on, and 11-O-β-d-glucosyl-(R)-16-desoxy-17-oxocafestol-2-on had lower bitter receptor activation thresholds compared to mozambioside. Molecular docking simulations revealed the binding modes of the compounds 11-O-β-d-glucosyl-15,16-dehydrocafestol-2-on and 11-O-β-d-glucosyl-(R)-16-desoxy-17-oxocafestol-2-on and their aglycone 11-hydroxycafestol-2-on in the two cognate receptors TAS2R43 and TAS2R46. The newly discovered roasting products 17-O-β-d-glucosyl-11-hydroxycafestol-2-on, 11-O-β-d-glucosyl-(S)-16-desoxy-17-oxocafestol-2-on, 11-O-β-d-glucosyl-15,16-dehydrocafestol-2-on, and 11-O-β-d-glucosyl-(R)-16-desoxy-17-oxocafestol-2-on were detected in authentic roast coffee brew by UHPLC-ToF-MS and could contribute to coffee's bitter taste impression.
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Affiliation(s)
- Coline Czech
- TUM Graduate School, 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.
| | - Tatjana Lang
- Leibniz Institute for Food Systems Biology at the Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany.
| | - Angelika Graßl
- Leibniz Institute for Food Systems Biology at the Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany.
| | - Alexandra Steuer
- TUM Graduate School, 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.
| | - Antonella Di Pizio
- Leibniz Institute for Food Systems Biology at the Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany; Chemoinformatics and Protein Modelling, School of Life Science, Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany.
| | - Maik Behrens
- Leibniz Institute for Food Systems Biology at the Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany.
| | - Roman Lang
- Leibniz Institute for Food Systems Biology at the Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany.
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24
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Szczepaniak O, Jokiel M, Stuper-Szablewska K, Kobus-Cisowska J. Docking analysis of phenolic acid and flavonoids with selected TAS2R receptors and in vitro experiment. Sci Rep 2024; 14:15983. [PMID: 38987427 PMCID: PMC11236965 DOI: 10.1038/s41598-024-66861-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Accepted: 07/04/2024] [Indexed: 07/12/2024] Open
Abstract
Cornelian cherry fruits contain a wide range of phenolic acids, flavonoids, and other secondary metabolites. Selected flavonoids may inhibit the perceiving of bitterness, however, the full mechanism with all TAS2R bitter taste receptors is not known. The aim of the study was to determine the inhibitory effect of Cornus mas phenolics against the bitterness receptors TAS2R13 and TAS2R3 through functional in vitro assays and coupling studies. The overall effect was validated by analysing the inhibition of the receptors activity in cells treated with tested cornelian cherry extracts. The strength of interaction with both TAS2R receptors varied between studied compounds with different binding affinity. Most compounds bonded with the TAS2R3 receptor through a long-distant hydrophobic interaction with Trp89A and π-π orbital overlapping-between phenolic and tryptophane aromatic rings. For TAS2R13 observed were various mechanisms of interaction with the compounds. Nonetheless, naringin and quercetin had most similar binding affinity to chloroquine and denatonium-the model agonists for the receptor.
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Affiliation(s)
- Oskar Szczepaniak
- Department of Gastronomy Science and Functional Foods, Poznań University of Life Sciences, ul. Wojska Polskiego 28, 60-637, Poznań, Poland.
- Department of Biochemistry and Biotechnology, Poznań University of Life Sciences, ul. Dojazd 11, 60-132, Poznań, Poland.
| | - Maria Jokiel
- Łukasiewicz Research Network - PORT Polish Center for Technology Development, ul. Stabłowicka 147, 54-066, Wrocław, Poland
| | - Kinga Stuper-Szablewska
- Department of Chemistry, Poznań University of Life Sciences, ul. Wojska Polskiego 75, 60-625, Poznań, Poland
| | - Joanna Kobus-Cisowska
- Department of Gastronomy Science and Functional Foods, Poznań University of Life Sciences, ul. Wojska Polskiego 28, 60-637, Poznań, Poland
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25
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Behrens M. The Growing Complexity of Human Bitter Taste Perception. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:14530-14534. [PMID: 38914424 PMCID: PMC11228980 DOI: 10.1021/acs.jafc.4c02465] [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: 03/20/2024] [Revised: 06/13/2024] [Accepted: 06/13/2024] [Indexed: 06/26/2024]
Abstract
Human bitter perception is important for the identification of potentially harmful substances in food. For quite some years, research focused on the identification of activators for ∼25 human bitter taste receptors. The discovery of antagonists as well as increasing knowledge about agonists of different efficacies has substantially added to the intricacy of bitter taste perception. This article seeks to raise awareness for an underestimated new level of complexity when compound mixtures or even whole food items are assessed for their bitter taste.
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Affiliation(s)
- Maik Behrens
- Leibniz Institute for Food
Systems Reception, Technical University
of Munich, 85354 Freising, Germany
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26
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Hou M, Akhtar MS, Hayashi M, Ashino R, Matsumoto-Oda A, Hayakawa T, Ishida T, Melin AD, Imai H, Kawamura S. Reduction of bitter taste receptor gene family in folivorous colobine primates relative to omnivorous cercopithecine primates. Primates 2024; 65:311-331. [PMID: 38605281 PMCID: PMC11219393 DOI: 10.1007/s10329-024-01124-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 02/26/2024] [Indexed: 04/13/2024]
Abstract
Bitter taste perception is important in preventing animals from ingesting potentially toxic compounds. Whole-genome assembly (WGA) data have revealed that bitter taste receptor genes (TAS2Rs) comprise a multigene family with dozens of intact and disrupted genes in primates. However, publicly available WGA data are often incomplete, especially for multigene families. In this study, we employed a targeted capture (TC) approach specifically probing TAS2Rs for ten species of cercopithecid primates with diverse diets, including eight omnivorous cercopithecine species and two folivorous colobine species. We designed RNA probes for all TAS2Rs that we modeled to be intact in the common ancestor of cercopithecids ("ancestral-cercopithecid TAS2R gene set"). The TC was followed by short-read and high-depth massive-parallel sequencing. TC retrieved more intact TAS2R genes than found in WGA databases. We confirmed a large number of gene "births" at the common ancestor of cercopithecids and found that the colobine common ancestor and the cercopithecine common ancestor had contrasting trajectories: four gene "deaths" and three gene births, respectively. The number of intact TAS2R genes was markedly reduced in colobines (25-28 detected via TC and 20-26 detected via WGA analysis) as compared with cercopithecines (27-36 via TC and 19-30 via WGA). Birth or death events occurred at almost every phylogenetic-tree branch, making the composition of intact genes variable among species. These results show that evolutionary change in intact TAS2R genes is a complex process, refute a simple general prediction that herbivory favors more TAS2R genes, and have implications for understanding dietary adaptations and the evolution of detoxification abilities.
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Affiliation(s)
- Min Hou
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo, Bioscience BLDG Room 502, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8562, Japan
| | - Muhammad Shoaib Akhtar
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo, Bioscience BLDG Room 502, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8562, Japan
| | - Masahiro Hayashi
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo, Bioscience BLDG Room 502, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8562, Japan
| | - Ryuichi Ashino
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo, Bioscience BLDG Room 502, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8562, Japan
| | - Akiko Matsumoto-Oda
- Graduate School of Tourism Sciences, University of the Ryukyus, Nishihara, Okinawa, Japan
| | - Takashi Hayakawa
- Faculty of Environmental Earth Science, Hokkaido University, Sapporo, Hokkaido, Japan
- Japan Monkey Centre, Inuyama, Aichi, Japan
| | - Takafumi Ishida
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | - Amanda D Melin
- Department of Anthropology and Archaeology, University of Calgary, Alberta, Canada
- Department of Medical Genetics, University of Calgary, Alberta, Canada
- Alberta Children's Hospital Research Institute, University of Calgary, Alberta, Canada
| | - Hiroo Imai
- Molecular Biology Section, Center for the Evolutionary Origins of Human Behavior, Kyoto University, Kyoto, Aichi, Japan
| | - Shoji Kawamura
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo, Bioscience BLDG Room 502, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8562, Japan.
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27
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An JP, Liu X, Wang Y. Discovery of bitter masking compounds from Allspice ( Pimenta dioica) using sensory guided isolation. Food Chem X 2024; 22:101426. [PMID: 38736983 PMCID: PMC11087956 DOI: 10.1016/j.fochx.2024.101426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 04/15/2024] [Accepted: 04/27/2024] [Indexed: 05/14/2024] Open
Abstract
Bitter substances in functional foods and beverages can act as nutraceuticals, offering potential health benefits. However, their unpleasant sensory impact reduces the consumption of these foods. Consequently, the discovery of bitter masking compounds is crucial for enhancing the intake of bioactive compounds in functional foods and beverages. Bitter taste is mediated by TAS2Rs, a sub-family of G-protein-coupled receptors. TAS2R14 is especially pivotal in the perception of bitterness, as it is one of the most broadly tuned bitter receptors. In this study, allspice was extracted and purified to yield five single compounds based on sensory guided fractionation. The structures of each compound were determined based on nuclear magnetic resonance (NMR) and high-resolution mass spectrometry (HR-MS). In a sensory evaluation, compound 1 exhibited bitter masking activity against quinine. Molecular docking analysis revealed that compound 1 could act as an antagonist of the TAS2R14 bitter receptor.
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Affiliation(s)
- Jin-Pyo An
- Department of Food Science and Human Nutrition, Citrus Research & Education Center, University of Florida, 700 Experiment Station Road, Lake Alfred, FL 33850, USA
| | - Xin Liu
- Department of Food Science and Human Nutrition, Citrus Research & Education Center, University of Florida, 700 Experiment Station Road, Lake Alfred, FL 33850, USA
| | - Yu Wang
- Department of Food Science and Human Nutrition, Citrus Research & Education Center, University of Florida, 700 Experiment Station Road, Lake Alfred, FL 33850, USA
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28
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Zuluaga G. Potential of Bitter Medicinal Plants: A Review of Flavor Physiology. Pharmaceuticals (Basel) 2024; 17:722. [PMID: 38931389 PMCID: PMC11206615 DOI: 10.3390/ph17060722] [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: 05/05/2024] [Revised: 05/30/2024] [Accepted: 05/31/2024] [Indexed: 06/28/2024] Open
Abstract
The function of the sense of taste is usually confined to the ability to perceive the flavor of food to assess and use the nutrients necessary for healthy survival and to discard those that may be harmful, toxic, or unpleasant. It is almost unanimously agreed that the perception of bitter taste prevents the consumption of toxins from plants, decaying foods, and drugs. Forty years ago, while practicing medicine in a rural area of the Colombian Amazon, I had an unexpected encounter with the Inga Indians. I faced the challenge of accepting that their traditional medicine was effective and that the medicinal plants they used had a real therapeutic effect. Wanting to follow a process of learning about medicinal plants on their terms, I found that, for them, the taste of plants is a primary and fundamental key to understanding their functioning. One of the most exciting results was discovering the therapeutic value of bitter plants. The present review aims to understand whether there is any scientific support for this hypothesis from the traditional world. Can the taste of plants explain their possible therapeutic benefit? In the last 20 years, we have made novel advances in the knowledge of the physiology of taste. Our purpose will be to explore these scientific advances to determine if the bitter taste of medicinal plants benefits human health.
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Affiliation(s)
- Germán Zuluaga
- Grupo de Estudios en Sistemas Tradicionales de Salud, Escuela de Medicina y Ciencias de la Salud, Universidad del Rosario, Bogotá 111711, Colombia; ; Tel.: +57-311-2179102
- Centro de Estudios Médicos Interculturales, Cota 250010, Colombia
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29
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Schaefer S, Ziegler F, Lang T, Steuer A, Di Pizio A, Behrens M. Membrane-bound chemoreception of bitter bile acids and peptides is mediated by the same subset of bitter taste receptors. Cell Mol Life Sci 2024; 81:217. [PMID: 38748186 PMCID: PMC11096235 DOI: 10.1007/s00018-024-05202-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 03/01/2024] [Accepted: 03/04/2024] [Indexed: 05/18/2024]
Abstract
The vertebrate sense of taste allows rapid assessment of the nutritional quality and potential presence of harmful substances prior to ingestion. Among the five basic taste qualities, salty, sour, sweet, umami, and bitter, bitterness is associated with the presence of putative toxic substances and elicits rejection behaviors in a wide range of animals including humans. However, not all bitter substances are harmful, some are thought to be health-beneficial and nutritious. Among those compound classes that elicit a bitter taste although being non-toxic and partly even essential for humans are bitter peptides and L-amino acids. Using functional heterologous expression assays, we observed that the 5 dominant human bitter taste receptors responsive to bitter peptides and amino acids are activated by bile acids, which are notorious for their extreme bitterness. We further demonstrate that the cross-reactivity of bitter taste receptors for these two different compound classes is evolutionary conserved and can be traced back to the amphibian lineage. Moreover, we show that the cross-detection by some receptors relies on "structural mimicry" between the very bitter peptide L-Trp-Trp-Trp and bile acids, whereas other receptors exhibit a phylogenetic conservation of this trait. As some bile acid-sensitive bitter taste receptor genes fulfill dual-roles in gustatory and non-gustatory systems, we suggest that the phylogenetic conservation of the rather surprising cross-detection of the two substance classes could rely on a gene-sharing-like mechanism in which the non-gustatory function accounts for the bitter taste response to amino acids and peptides.
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Affiliation(s)
- Silvia Schaefer
- TUM Graduate School, 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-Strasse 34, 85354, Freising, Germany
| | - Florian Ziegler
- TUM Graduate School, 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-Strasse 34, 85354, Freising, Germany
| | - Tatjana Lang
- Leibniz Institute for Food Systems Biology at the Technical University of Munich, Lise-Meitner-Strasse 34, 85354, Freising, Germany
| | - Alexandra Steuer
- TUM Graduate School, 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-Strasse 34, 85354, Freising, Germany
| | - Antonella Di Pizio
- Leibniz Institute for Food Systems Biology at the Technical University of Munich, Lise-Meitner-Strasse 34, 85354, Freising, Germany
- Chemoinformatics and Protein Modelling, Technical University of Munich, Freising, Germany
| | - Maik Behrens
- Leibniz Institute for Food Systems Biology at the Technical University of Munich, Lise-Meitner-Strasse 34, 85354, Freising, Germany.
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30
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Steiner D, Meyer A, Immohr LI, Pein-Hackelbusch M. Critical View on the Qualification of Electronic Tongues Regarding Their Performance in the Development of Peroral Drug Formulations with Bitter Ingredients. Pharmaceutics 2024; 16:658. [PMID: 38794320 PMCID: PMC11125162 DOI: 10.3390/pharmaceutics16050658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 05/03/2024] [Accepted: 05/09/2024] [Indexed: 05/26/2024] Open
Abstract
In this review, we aim to highlight the advantages, challenges, and limitations of electronic tongues (e-tongues) in pharmaceutical drug development. The authors, therefore, critically evaluated the performance of e-tongues regarding their qualification to assess peroral formulations containing bitter active pharmaceutical ingredients. A literature search using the keywords 'electronic', 'tongue', 'bitter', and 'drug' in a Web of Science search was therefore initially conducted. Reviewing the publications of the past decade, and further literature where necessary, allowed the authors to discuss whether and how e-tongues perform as expected and whether they have the potential to become a standard tool in drug development. Specifically highlighted are the expectations an e-tongue should meet. Further, a brief insight into the technologies of the utilized e-tongues is given. Reliable protocols were found that enable (i) the qualified performance of e-tongue instruments from an analytical perspective, (ii) proper taste-masking assessments, and (iii) under certain circumstances, the evaluation of bitterness.
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Affiliation(s)
- Denise Steiner
- Institute of Pharmaceutical Technology and Biopharmaceutics, University of Muenster, Corrensstraße 48, 48149 Muenster, Germany;
| | - Alexander Meyer
- Institute for Life Science Technologies (ILT.NRW), Ostwestfalen-Lippe University of Applied Sciences and Arts, Campusallee 12, 32657 Lemgo, Germany
| | | | - Miriam Pein-Hackelbusch
- Institute for Life Science Technologies (ILT.NRW), Ostwestfalen-Lippe University of Applied Sciences and Arts, Campusallee 12, 32657 Lemgo, Germany
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31
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Egan JM. Physiological Integration of Taste and Metabolism. N Engl J Med 2024; 390:1699-1710. [PMID: 38718360 DOI: 10.1056/nejmra2304578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Affiliation(s)
- Josephine M Egan
- From the Diabetes Section, Laboratory of Clinical Investigation, National Institute on Aging, National Institutes of Health, Baltimore
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32
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Kumar P, Behrens M. Influence of Sodium Chloride on Human Bitter Taste Receptor Responses. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:10531-10536. [PMID: 38663860 PMCID: PMC11082923 DOI: 10.1021/acs.jafc.3c08775] [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: 11/23/2023] [Revised: 04/08/2024] [Accepted: 04/08/2024] [Indexed: 05/09/2024]
Abstract
In the past, taste interactions between sodium chloride (NaCl) and bitter tastants were investigated in human sensory studies, and the suppression of bitterness by sodium was observed. It is currently not clear if this phenomenon occurs predominantly peripherally or centrally and if the effect is general or only particular bitter compounds are blocked. Therefore, the influence of NaCl at the receptor level was tested by functional expression assays using four out of ∼25 human bitter taste receptors together with prototypical agonists. It was observed that NaCl affected only the responses of particular bitter taste receptor-compound pairs, whereas other bitter responses remained unchanged upon variations of the sodium concentrations. Among the tested receptors, TAS2R16 showed a reduction in signaling in the presence of NaCl. This demonstrates that for some receptor-agonist pairs, NaCl reduces the activation at the receptor level, whereas central effects may dominate the NaCl-induced bitter taste inhibition for other substances.
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Affiliation(s)
- Praveen Kumar
- Leibniz Institute for Food
Systems Biology at the Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany
| | - Maik Behrens
- Leibniz Institute for Food
Systems Biology at the Technical University of Munich, Lise-Meitner-Str. 34, 85354 Freising, Germany
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Feng P, Wang H, Liang X, Dong X, Liang Q, Shu F, Zhou Q. Relationships between Bitter Taste Receptor Gene Evolution, Diet, and Gene Repertoire in Primates. Genome Biol Evol 2024; 16:evae104. [PMID: 38748818 PMCID: PMC11135642 DOI: 10.1093/gbe/evae104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/08/2024] [Indexed: 05/30/2024] Open
Abstract
Bitter taste perception plays a critical role in deterring animals from consuming harmful and toxic substances. To characterize the evolution of primate Tas2r, test the generality of Tas2r duplication in Cercopithecidae species, and examine whether dietary preferences have shaped the Tas2r repertoire of primate species, we identified Tas2r in the genomes of 35 primate species, including 16 Cercopithecidae, 6 Hominidae, 4 Cebidae, 3 Lemuridae, and 6 other species. The results showed that the total number of primate Tas2r ranged from 27 to 51, concentrating on 2 to 4 scaffolds of each species. Closely related genes were tandemly duplicated in the same scaffold. Phylogenetic construction revealed that Tas2r can be divided into 21 clades, including anthropoid-, Strepsirrhini-, and Cercopithecidae-specific Tas2r duplications. Phylogenetically independent contrast analysis revealed that the number of intact Tas2r significantly correlated with feeding preferences. Altogether, our data support diet as a driver of primate Tas2r evolution, and Cercopithecidae species have developed some specific Tas2r duplication during evolution. These results are probably because most Cercopithecidae species feed on plants containing many toxins, and it is necessary to develop specialized Tas2r to protect them from poisoning.
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Affiliation(s)
- Ping Feng
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education of the People’s Republic of China, Guangxi Normal University, Guilin, Guangxi, China
- Guangxi Key Laboratory of Rare and Endangered Animal Ecology, Guangxi Normal University, Guilin, Guangxi, China
| | - Hui Wang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education of the People’s Republic of China, Guangxi Normal University, Guilin, Guangxi, China
- Guangxi Key Laboratory of Rare and Endangered Animal Ecology, Guangxi Normal University, Guilin, Guangxi, China
| | - Xinyue Liang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education of the People’s Republic of China, Guangxi Normal University, Guilin, Guangxi, China
- Guangxi Key Laboratory of Rare and Endangered Animal Ecology, Guangxi Normal University, Guilin, Guangxi, China
| | - Xiaoyan Dong
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education of the People’s Republic of China, Guangxi Normal University, Guilin, Guangxi, China
- Guangxi Key Laboratory of Rare and Endangered Animal Ecology, Guangxi Normal University, Guilin, Guangxi, China
| | - Qiufang Liang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education of the People’s Republic of China, Guangxi Normal University, Guilin, Guangxi, China
- Guangxi Key Laboratory of Rare and Endangered Animal Ecology, Guangxi Normal University, Guilin, Guangxi, China
| | - Fanglan Shu
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education of the People’s Republic of China, Guangxi Normal University, Guilin, Guangxi, China
- Guangxi Key Laboratory of Rare and Endangered Animal Ecology, Guangxi Normal University, Guilin, Guangxi, China
| | - Qihai Zhou
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education of the People’s Republic of China, Guangxi Normal University, Guilin, Guangxi, China
- Guangxi Key Laboratory of Rare and Endangered Animal Ecology, Guangxi Normal University, Guilin, Guangxi, China
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Chu X, Zhu W, Li X, Su E, Wang J. Bitter flavors and bitter compounds in foods: identification, perception, and reduction techniques. Food Res Int 2024; 183:114234. [PMID: 38760147 DOI: 10.1016/j.foodres.2024.114234] [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: 09/25/2023] [Revised: 03/09/2024] [Accepted: 03/12/2024] [Indexed: 05/19/2024]
Abstract
Bitterness is one of the five basic tastes generally considered undesirable. The widespread presence of bitter compounds can negatively affect the palatability of foods. The classification and sensory evaluation of bitter compounds have been the focus in recent research. However, the rigorous identification of bitter tastes and further studies to effectively mask or remove them have not been thoroughly evaluated. The present paper focuses on identification of bitter compounds in foods, structural-based activation of bitter receptors, and strategies to reduce bitter compounds in foods. It also discusses the roles of metabolomics and virtual screening analysis in bitter taste. The identification of bitter compounds has seen greater success through metabolomics with multivariate statistical analysis compared to conventional chromatography, HPLC, LC-MS, and NMR techniques. However, to avoid false positives, sensory recognition should be combined. Bitter perception involves the structural activation of bitter taste receptors (TAS2Rs). Only 25 human TAS2Rs have been identified as responsible for recognizing numerous bitter compounds, showcasing their high structural diversity to bitter agonists. Thus, reducing bitterness can be achieved through several methods. Traditionally, the removal or degradation of bitter substances has been used for debittering, while the masking of bitterness presents a new effective approach to improving food flavor. Future research in food bitterness should focus on identifying unknown bitter compounds in food, elucidating the mechanisms of activation of different receptors, and developing debittering techniques based on the entire food matrix.
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Affiliation(s)
- Xinyu Chu
- Department of Food Science and Technology, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Wangsheng Zhu
- Engineering Technology Research Center for Plant Cell of Anhui Province, West Anhui University, Anhui 237012, China
| | - Xue Li
- Department of Food Science and Technology, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Erzheng Su
- Department of Food Science and Technology, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China; Co-innovation Center for the Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing 210037, China; Co-Innovation Center of Efficient Procession of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
| | - Jiahong Wang
- Department of Food Science and Technology, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China; Co-innovation Center for the Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing 210037, China; Co-Innovation Center of Efficient Procession of Forest Resources, Nanjing Forestry University, Nanjing 210037, China.
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35
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Łukasiewicz-Śmietańska D, Godlewski D, Nowakowska E, Szpak A, Chabros E, Juszczyk G, Charzewska J, Rybaczyk-Pathak D. Association of the bitter taste genes TAS2R38 and CA6 and breast cancer risk; a case-control study of Polish women in Poland and Polish immigrants in USA. PLoS One 2024; 19:e0300061. [PMID: 38687739 PMCID: PMC11060581 DOI: 10.1371/journal.pone.0300061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 02/21/2024] [Indexed: 05/02/2024] Open
Abstract
It is known that the perception of bitterness is mediated by type 2 bitter taste receptors (TAS2Rs). However, recent reports have suggested that the carbonic anhydrase 6 (CA6) gene may also influence bitterness sensing. Genetic variants in these genes could influence dietary intake of brassica vegetables, whose increased consumption has been observed in the literature, though inconsistently, to decrease breast cancer (BC) risk. We hypothesized that the estimated odds ratios (ORs) for the association between BC and taster diplotype (PAV/PAV) and/or genotype A/A, will be in the direction of increased BC risk, potentially due to reduced consumption of brassica vegetables. Using a case-control study of BC in Polish women in Poland (210 cases and 262 controls) and Polish immigrant women to USA (78 cases and 170 controls) we evaluated the association of the taster diplotypes in TAS2R38 gene and genotypes in the CA6 gene and BC risk in these two populations individually and jointly. No significant increase in risk was observed for the TAS2R38 PAV/PAV diplotype (tasters) in each population individually or in the joint population. For the CA6 gene, in the joint population, we observed an increased BC risk for the combined G/A and G/G genotypes (non-tasters) vs A/A (tasters), OR = 1.41 (95% CI 1.04-1.90, p = 0.026) which after adjustment for False Discovery Rate (FDR), was not significant at p≤0.05 level. However, for the joint population and for the combined genotype of the two genes AVI/AVI+G* (non-tasters) vs. PAV/*+A/A (tasters), we observed a significant increase in BC risk, OR = 1.77 (95%CI 1.47-2.74, p = 0.01), for the non-tasters, which remained significant after FDR adjustment. In conclusion for the joint population and the joint effect for the two bitter sensing genes, we observed an increase in BC risk for the bitterness non-tasters, association which is in the opposite direction to our original hypothesis.
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Affiliation(s)
- Dorota Łukasiewicz-Śmietańska
- Department of Nutrition and Nutritional Value of Food, National Institute of Public Health NIH- National Research Institute, Warsaw, Poland
| | | | | | | | | | - Grzegorz Juszczyk
- National Institute of Public Health NIH- National Research Institute, Warsaw, Poland
| | - Jadwiga Charzewska
- Department of Nutrition and Nutritional Value of Food, National Institute of Public Health NIH- National Research Institute, Warsaw, Poland
| | - Dorothy Rybaczyk-Pathak
- Department of Epidemiology and Biostatistics, Michigan State University, East Lansing, MI, United States of America
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36
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Nolden AA, Behrens M, McGeary JE, Meyerhof W, Hayes JE. Differential Activation of TAS2R4 May Recover Ability to Taste Propylthiouracil for Some TAS2R38 AVI Homozygotes. Nutrients 2024; 16:1357. [PMID: 38732607 PMCID: PMC11085076 DOI: 10.3390/nu16091357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 04/24/2024] [Accepted: 04/25/2024] [Indexed: 05/13/2024] Open
Abstract
Bitterness from phenylthiocarbamide and 6-n-propylthiouracil (PROP) varies with polymorphisms in the TAS2R38 gene. Three SNPs form two common (AVI, PAV) and four rare haplotypes (AAI, AAV, PVI, and PAI). AVI homozygotes exhibit higher detection thresholds and lower suprathreshold bitterness for PROP compared to PAV homozygotes and heterozygotes, and these differences may influence alcohol and vegetable intake. Within a diplotype, substantial variation in suprathreshold bitterness persists, and some AVI homozygotes report moderate bitterness at high concentrations. A second receptor encoded by a gene containing a functional polymorphism may explain this. Early work has suggested that PROP might activate TAS2R4 in vitro, but later work did not replicate this. Here, we identify three TAS2R4 SNPs that result in three diplotypes-SLN/SLN, FVS/SLN, and FVS/FVS-which make up 25.1%, 44.9%, and 23.9% of our sample. These TAS2R4 haplotypes show minimal linkage disequilibrium with TAS2R38, so we examined the suprathreshold bitterness as a function of both. The participants (n = 243) rated five PROP concentrations in duplicate, interleaved with other stimuli. As expected, the TAS2R38 haplotypes explained ~29% (p < 0.0001) of the variation in the bitterness ratings, with substantial variation within the haplotypes (AVI/AVI, PAV/AVI, and PAV/PAV). Notably, the TAS2R4 diplotypes (independent of the TAS2R38 haplotypes) explained ~7-8% of the variation in the bitterness ratings (p = 0.0001). Given this, we revisited if PROP could activate heterologously expressed TAS2R4 in HEK293T cells, and calcium imaging indicated 3 mM PROP is a weak TAS2R4 agonist. In sum, our data are consistent with the second receptor hypothesis and may explain the recovery of the PROP tasting phenotype in some AVI homozygotes; further, this finding may potentially help explain the conflicting results on the TAS2R38 diplotype and food intake.
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Affiliation(s)
- Alissa A. Nolden
- Department of Food Science, University of Massachusetts, Amherst, MA 01003, USA;
- Sensory Evaluation Center, The Pennsylvania State University, University Park, PA 16802, USA
- Department of Food Science, The Pennsylvania State University, University Park, PA 16802, USA
| | - Maik Behrens
- German Institute of Human Nutrition Potsdam-Rehbruecke, Department Molecular Genetics, 14558 Nuthetal, Germany; (M.B.); (W.M.)
- Leibniz Institute for Food Systems Biology, Technical University of Munich, 85354 Freising, Germany
| | - John E. McGeary
- Center of Innovation in Long Term Services & Supports, VA Providence Healthcare, Providence, RI 02908, USA;
- Department of Psychiatry & Human Behavior, Alpert Medical School of Brown University, Providence, RI 02903, USA
| | - Wolfgang Meyerhof
- German Institute of Human Nutrition Potsdam-Rehbruecke, Department Molecular Genetics, 14558 Nuthetal, Germany; (M.B.); (W.M.)
- Center for Integrative Physiology and Molecular Medicine, Saarland University, 66424 Homburg, Germany
| | - John E. Hayes
- Sensory Evaluation Center, The Pennsylvania State University, University Park, PA 16802, USA
- Department of Food Science, The Pennsylvania State University, University Park, PA 16802, USA
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Nguyen H, Lin C, Bell K, Huang A, Hannum M, Ramirez V, Christensen C, Rawson NE, Colquitt L, Domanico P, Sasimovich I, Herriman R, Joseph P, Braimah O, Reed DR. Worldwide study of the taste of bitter medicines and their modifiers. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.04.24.590957. [PMID: 38712219 PMCID: PMC11071635 DOI: 10.1101/2024.04.24.590957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
The bitter taste of medicines hinders patient compliance, but not everyone experiences these difficulties because people worldwide differ in their bitterness perception. To better understand how people from diverse ancestries perceive medicines and taste modifiers, 338 adults, European and recent US and Canada immigrants from Asia, South Asia, and Africa, rated the bitterness intensity of taste solutions on a 100-point generalized visual analog scale and provided a saliva sample for genotyping. The taste solutions were five medicines, tenofovir alafenamide (TAF), moxifloxacin, praziquantel, amodiaquine, and propylthiouracil (PROP), and four other solutions, TAF mixed with sucralose (sweet, reduces bitterness) or 6-methylflavone (tasteless, reduces bitterness), sucralose alone, and sodium chloride alone. Bitterness ratings differed by ancestry for two of the five drugs (amodiaquine and PROP) and for TAF mixed with sucralose. Genetic analysis showed that people with variants in one bitter receptor variant gene (TAS2R38) reported PROP was more bitter than did those with a different variant (p= 7.6e-19) and that people with either an RIMS2 or a THSD4 genotype found sucralose more bitter than did others (p=2.6e-8, p=7.9e-11, resp.). Our findings may help guide the formulation of bad-tasting medicines to meet the needs of those most sensitive to them.
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Affiliation(s)
- Ha Nguyen
- Monell Chemical Senses Center, Philadelphia PA, USA
| | - Cailu Lin
- Monell Chemical Senses Center, Philadelphia PA, USA
| | | | - Amy Huang
- Monell Chemical Senses Center, Philadelphia PA, USA
| | | | | | | | | | | | | | | | | | - Paule Joseph
- National Institute of Alcohol Abuse and Alcoholism & National Institute of Nursing Research, Bethesda MD, USA
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38
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Labani N, Gbahou F, Lian S, Liu J, Jockers R. 2023 Julius Axelrod Symposium: Plant-Derived Molecules Acting on G Protein-Coupled Receptors. Mol Pharmacol 2024; 105:328-347. [PMID: 38458772 DOI: 10.1124/molpharm.123.000854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 02/12/2024] [Accepted: 02/20/2024] [Indexed: 03/10/2024] Open
Abstract
Plant extracts have played a significant role in traditional medicine for centuries, contributing to improved health and the treatment of various human illnesses. G protein-coupled receptors (GPCRs) are crucial in numerous physiologic functions, and there is growing evidence suggesting their involvement in the therapeutic effects of many plant extracts. In recent years, scientists have identified an expanding number of isolated molecules responsible for the biologic activity of these extracts, with many believed to act on GPCRs. This article critically reviews the evidence supporting the modulation of GPCR function by these plant-derived molecules through direct binding. Structural information is now available for some of these molecules, allowing for a comparison of their binding mode with that of endogenous GPCR ligands. The final section explores future trends and challenges, focusing on the identification of new plant-derived molecules with both orthosteric and allosteric binding modes, as well as innovative strategies for designing GPCR ligands inspired by these plant-derived compounds. In conclusion, plant-derived molecules are anticipated to play an increasingly vital role as therapeutic drugs and serve as templates for drug design. SIGNIFICANCE STATEMENT: This minireview summarizes the most pertinent publications on isolated plant-derived molecules interacting with G protein-coupled receptors (GPCRs) and comments on available structural information on GPCR/plant-derived ligand pairs. Future challenges and trends for the isolation and characterization of plant-derived molecules and drug design are discussed.
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Affiliation(s)
- Nedjma Labani
- Cellular Signaling Laboratory, International Research Center for Sensory Biology and Technology of MOST, Key Laboratory of Molecular Biophysics of Ministry of Education, School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China (N.L., J.L.) and Université Paris Cité, Institut Cochin, INSERM, CNRS, F-75014 PARIS, France (N.L., F.G., S.L., R.J.)
| | - Florence Gbahou
- Cellular Signaling Laboratory, International Research Center for Sensory Biology and Technology of MOST, Key Laboratory of Molecular Biophysics of Ministry of Education, School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China (N.L., J.L.) and Université Paris Cité, Institut Cochin, INSERM, CNRS, F-75014 PARIS, France (N.L., F.G., S.L., R.J.)
| | - Shuangyu Lian
- Cellular Signaling Laboratory, International Research Center for Sensory Biology and Technology of MOST, Key Laboratory of Molecular Biophysics of Ministry of Education, School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China (N.L., J.L.) and Université Paris Cité, Institut Cochin, INSERM, CNRS, F-75014 PARIS, France (N.L., F.G., S.L., R.J.)
| | - Jianfeng Liu
- Cellular Signaling Laboratory, International Research Center for Sensory Biology and Technology of MOST, Key Laboratory of Molecular Biophysics of Ministry of Education, School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China (N.L., J.L.) and Université Paris Cité, Institut Cochin, INSERM, CNRS, F-75014 PARIS, France (N.L., F.G., S.L., R.J.)
| | - Ralf Jockers
- Cellular Signaling Laboratory, International Research Center for Sensory Biology and Technology of MOST, Key Laboratory of Molecular Biophysics of Ministry of Education, School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China (N.L., J.L.) and Université Paris Cité, Institut Cochin, INSERM, CNRS, F-75014 PARIS, France (N.L., F.G., S.L., R.J.)
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39
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Qu M, Lu P, Lifshitz LM, Moore Simas TA, Delpapa E, ZhuGe R. Phenanthroline relaxes uterine contractions induced by diverse contractile agents by decreasing cytosolic calcium concentration. Eur J Pharmacol 2024; 968:176343. [PMID: 38281680 PMCID: PMC10939717 DOI: 10.1016/j.ejphar.2024.176343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 01/17/2024] [Accepted: 01/17/2024] [Indexed: 01/30/2024]
Abstract
Uterine contractions during labor and preterm labor are influenced by a complex interplay of factors, including hormones and inflammatory mediators. This complexity may contribute to the limited efficacy of current tocolytics for preterm labor, a significant challenge in obstetrics with 15 million cases annually and approximately 1 million resulting deaths worldwide. We have previously shown that the myometrium expresses bitter taste receptors (TAS2Rs) and that their activation leads to uterine relaxation. Here, we investigated whether the selective TAS2R5 agonist phenanthroline can induce relaxation across a spectrum of human uterine contractions and whether the underlying mechanism involves changes in intracellular Ca2+ signaling. We performed experiments using samples from pregnant women undergoing scheduled cesarean delivery, assessing responses to various inflammatory mediators and oxytocin with and without phenanthroline. Our results showed that phenanthroline concentration-dependently inhibited contractions induced by PGF2α, U46619, 5-HT, endothelin-1 and oxytocin. Furthermore, in hTERT-infected human myometrial cells exposed to uterotonics, phenanthroline effectively suppressed the increase in intracellular Ca2+ concentration induced by PGF2α, U46619, oxytocin, and endothelin-1. These results suggest that the selective TAS2R5 agonist may not only significantly reduce uterine contractions but also decrease intracellular Ca2+ levels. This study highlights the potential development of TAS2R5 agonists as a new class of uterine relaxants, providing a novel avenue for improving the management of preterm labor.
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Affiliation(s)
- Mingzi Qu
- Department of Microbiology and Physiological Systems, UMass Chan Medical School, 363 Plantation St., Worcester, MA, USA
| | - Ping Lu
- Department of Microbiology and Physiological Systems, UMass Chan Medical School, 363 Plantation St., Worcester, MA, USA
| | - Lawrence M Lifshitz
- Program in Molecular Medicine, UMass Chan Medical School, 373 Plantation St., Worcester, MA, USA
| | - Tiffany A Moore Simas
- Department of Obstetrics and Gynecology, UMass Chan Medical School/UMass Memorial Health, 119 Belmont St, Worcester, MA, USA
| | - Ellen Delpapa
- Department of Obstetrics and Gynecology, UMass Chan Medical School/UMass Memorial Health, 119 Belmont St, Worcester, MA, USA.
| | - Ronghua ZhuGe
- Department of Microbiology and Physiological Systems, UMass Chan Medical School, 363 Plantation St., Worcester, MA, USA.
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40
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Nguyen H, Lin C, Sasimovich I, Bell K, Huang A, Leszkowicz E, Rawson NE, Reed DR. Thiazolidinediones are Partially Effective Bitter Blockers. Clin Ther 2024; 46:345-353. [PMID: 38462427 PMCID: PMC11116052 DOI: 10.1016/j.clinthera.2024.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 12/14/2023] [Accepted: 02/11/2024] [Indexed: 03/12/2024]
Abstract
PURPOSE The bad bitter taste of some medicines is a barrier to overcoming noncompliance with medication use, especially life-saving drugs given to children and the elderly. Here, we evaluated a new class of bitter blockers (thiazolidinediones, TZDs). METHODS In this study, 2 TZDs were tested, rosiglitazone (ROSI) and a simpler form of TZD, using a high-potency sweetener as a positive control (neohesperidin dihydrochalcone, NHDC). We tested bitter-blocking effects using the bitter drugs tenofovir alafenamide fumarate (TAF), a treatment for HIV and hepatitis B infection, and praziquantel (PRAZ), a treatment for schistosomiasis, by conducting taste testing with 2 separate taste panels: a general panel (N = 97, 20-23 years, 82.5% female, all Eastern European) and a genetically informative panel (N = 158, including 68 twin pairs, 18-82 years, 76% female, 87% European ancestry). Participants rated the bitterness intensity of the solutions on a 100-point generalized visual analog scale. FINDINGS Person-to-person differences in drug bitterness were striking; TAF and PRAZ were weakly or not bitter for some people but moderately to highly bitter for others. Participants in both taste panels rated the bitter drugs TAF and PRAZ as less bitter on average when mixed with NHDC than when sampled alone. ROSI partially suppressed the bitterness of TAF and PRAZ, but effectiveness differed between the 2 panels: bitterness was significantly reduced for PRAZ but not TAF in the general panel and for TAF but not PRAZ in the genetically informative panel. ROSI was a more effective blocker than the other TZD. IMPLICATIONS These results suggest that TZDs are partially effective bitter blockers and the suppression efficacy differs from drug to drug, from person to person, and from panel to panel, suggesting other TZDs should be designed and tested with more drugs and on diverse populations to define which ones work best with which drugs and for whom. The discovery of bitter receptor blockers can improve compliance with medication use.
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Affiliation(s)
- Ha Nguyen
- Monell Chemical Senses Center, Philadelphia, Pennsylvania
| | - Cailu Lin
- Monell Chemical Senses Center, Philadelphia, Pennsylvania
| | | | - Katherine Bell
- Monell Chemical Senses Center, Philadelphia, Pennsylvania
| | - Amy Huang
- Monell Chemical Senses Center, Philadelphia, Pennsylvania
| | - Emilia Leszkowicz
- Department of Animal and Human Physiology, Faculty of Biology, University of Gdańsk, Gdańsk, Poland
| | - Nancy E Rawson
- Monell Chemical Senses Center, Philadelphia, Pennsylvania
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41
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Su W, Ni L, Chen Y, Wang D, Lin CC, Liu Y, Liu Z. Multidimensional exploration of the bitterness amelioration effect of roasting on Wuyi Rock tea. Food Chem 2024; 437:137954. [PMID: 37952394 DOI: 10.1016/j.foodchem.2023.137954] [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: 08/29/2023] [Revised: 10/24/2023] [Accepted: 11/06/2023] [Indexed: 11/14/2023]
Abstract
The influence of roasting on tea bitterness remains unclear. With Wuyi Rock tea (WRT) as an example, this study investigated the impact of roasting on WRT's bitterness, utilizing an integrated approach involving sensory evaluation, bitter compound profiling, and cell-based calcium imaging. Sensory analysis revealed that roasting effectively reduced the perceived bitterness of WRT. This reduction was supported by decreases in various bitter compounds, including 19 flavanols, 11 flavonols, 12 phenolic acids, 2 purine alkaloids, and 9 bitter amino acids, which diminished by 16%, 26%, 19%, 2%, and 70%, respectively. Furthermore, we established two heterogeneous bitter receptor expression systems: TAS2R39/Gα15-HEK293T and TAS2R14/Gα15-HEK293T cell lines. These systems quantitatively confirmed the reduction in bitterness, demonstrating 51% and 62% decreases in intracellular calcium mobilization within the transfected cells, respectively. These findings provide compelling evidence for the bitterness-ameliorating effect of roasting, expanding our knowledge of the role of roasting in shaping the flavor of tea.
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Affiliation(s)
- Weiying Su
- College of Chemical Engineering, Fuzhou University, Fuzhou, Fujian 350108, China; Institute of Food Science & Technology, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Li Ni
- College of Chemical Engineering, Fuzhou University, Fuzhou, Fujian 350108, China; Institute of Food Science & Technology, Fuzhou University, Fuzhou, Fujian 350108, China.
| | - Yizhe Chen
- Institute of Food Science & Technology, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Daoliang Wang
- College of Chemical Engineering, Fuzhou University, Fuzhou, Fujian 350108, China; Institute of Food Science & Technology, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Chih-Cheng Lin
- Department of Biotechnology and Pharmaceutical Technology, Yuanpei University of Medical Technology, Hsinchu, Taiwan, Province of China, China
| | - Yuan Liu
- Department of Food Science & Technology, School of Agriculture & Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zhibin Liu
- Institute of Food Science & Technology, Fuzhou University, Fuzhou, Fujian 350108, China.
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42
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Poirier N, Ménétrier F, Moreno J, Boichot V, Heydel JM, Didierjean C, Canivenc-Lavier MC, Canon F, Neiers F, Schwartz M. Rattus norvegicus Glutathione Transferase Omega 1 Localization in Oral Tissues and Interactions with Food Phytochemicals. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:5887-5897. [PMID: 38441878 DOI: 10.1021/acs.jafc.4c00483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
Glutathione transferases are xenobiotic-metabolizing enzymes with both glutathione-conjugation and ligandin roles. GSTs are present in chemosensory tissues and fluids of the nasal/oral cavities where they protect tissues from exogenous compounds, including food molecules. In the present study, we explored the presence of the omega-class glutathione transferase (GSTO1) in the rat oral cavity. Using immunohistochemistry, GSTO1 expression was found in taste bud cells of the tongue epithelium and buccal cells of the oral epithelium. Buccal and lingual extracts exhibited thiol-transferase activity (4.9 ± 0.1 and 1.8 ± 0.1 μM/s/mg, respectively). A slight reduction from 4.9 ± 0.1 to 4.2 ± 0.1 μM/s/mg (p < 0.05; Student's t test) was observed in the buccal extract with 100 μM GSTO1-IN-1, a specific inhibitor of GSTO1. RnGSTO1 exhibited the usual activities of omega GSTs, i.e., thiol-transferase (catalytic efficiency of 8.9 × 104 M-1·s-1), and phenacyl-glutathione reductase (catalytic efficiency of 8.9 × 105 M-1·s-1) activities, similar to human GSTO1. RnGSTO1 interacts with food phytochemicals, including bitter compounds such as luteolin (Ki = 3.3 ± 1.9 μM). Crystal structure analysis suggests that luteolin most probably binds to RnGSTO1 ligandin site. Our results suggest that GSTO1 could interact with food phytochemicals in the oral cavity.
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Affiliation(s)
- Nicolas Poirier
- CSGA, INRAE, CNRS, University of Burgundy, Institut Agro, Dijon 21065, France
| | - Franck Ménétrier
- CSGA, INRAE, CNRS, University of Burgundy, Institut Agro, Dijon 21065, France
| | - Jade Moreno
- CSGA, INRAE, CNRS, University of Burgundy, Institut Agro, Dijon 21065, France
| | - Valentin Boichot
- CSGA, INRAE, CNRS, University of Burgundy, Institut Agro, Dijon 21065, France
| | - Jean-Marie Heydel
- CSGA, INRAE, CNRS, University of Burgundy, Institut Agro, Dijon 21065, France
| | | | | | - Francis Canon
- CSGA, INRAE, CNRS, University of Burgundy, Institut Agro, Dijon 21065, France
| | - Fabrice Neiers
- CSGA, INRAE, CNRS, University of Burgundy, Institut Agro, Dijon 21065, France
| | - Mathieu Schwartz
- CSGA, INRAE, CNRS, University of Burgundy, Institut Agro, Dijon 21065, France
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43
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Öz-Arslan D, Durer ZA, Kan B. G protein-coupled receptor-mediated autophagy in health and disease. Br J Pharmacol 2024. [PMID: 38501194 DOI: 10.1111/bph.16345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 01/05/2024] [Accepted: 01/27/2024] [Indexed: 03/20/2024] Open
Abstract
G protein-coupled receptors (GPCRs) constitute the largest and most diverse superfamily of mammalian transmembrane proteins. These receptors are involved in a wide range of physiological functions and are targets for more than a third of available drugs in the market. Autophagy is a cellular process involved in degrading damaged proteins and organelles and in recycling cellular components. Deficiencies in autophagy are involved in a variety of pathological conditions. Both GPCRs and autophagy are essential in preserving homeostasis and cell survival. There is emerging evidence suggesting that GPCRs are direct regulators of autophagy. Additionally, autophagic machinery is involved in the regulation of GPCR signalling. The interplay between GPCR and autophagic signalling mechanisms significantly impacts on health and disease; however, there is still an incomplete understanding of the underlying mechanisms and therapeutic implications in different tissues and disease contexts. This review aims to discuss the interactions between GPCR and autophagy signalling. Studies on muscarinic receptors, beta-adrenoceptors, taste receptors, purinergic receptors and adhesion GPCRs are summarized, in relation to autophagy.
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Affiliation(s)
- Devrim Öz-Arslan
- Department of Biophysics, Acibadem MAA University, School of Medicine, Istanbul, Turkey
| | - Zeynep Aslıhan Durer
- Department of Biophysics, Acibadem MAA University, School of Medicine, Istanbul, Turkey
- Department of Biochemistry, Acibadem MAA University, School of Pharmacy, Istanbul, Turkey
| | - Beki Kan
- Department of Biophysics, Acibadem MAA University, School of Medicine, Istanbul, Turkey
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44
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Pallante L, Cannariato M, Androutsos L, Zizzi EA, Bompotas A, Hada X, Grasso G, Kalogeras A, Mavroudi S, Di Benedetto G, Theofilatos K, Deriu MA. VirtuousPocketome: a computational tool for screening protein-ligand complexes to identify similar binding sites. Sci Rep 2024; 14:6296. [PMID: 38491261 PMCID: PMC10943019 DOI: 10.1038/s41598-024-56893-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Accepted: 03/12/2024] [Indexed: 03/18/2024] Open
Abstract
Protein residues within binding pockets play a critical role in determining the range of ligands that can interact with a protein, influencing its structure and function. Identifying structural similarities in proteins offers valuable insights into their function and activation mechanisms, aiding in predicting protein-ligand interactions, anticipating off-target effects, and facilitating the development of therapeutic agents. Numerous computational methods assessing global or local similarity in protein cavities have emerged, but their utilization is impeded by complexity, impractical automation for amino acid pattern searches, and an inability to evaluate the dynamics of scrutinized protein-ligand systems. Here, we present a general, automatic and unbiased computational pipeline, named VirtuousPocketome, aimed at screening huge databases of proteins for similar binding pockets starting from an interested protein-ligand complex. We demonstrate the pipeline's potential by exploring a recently-solved human bitter taste receptor, i.e. the TAS2R46, complexed with strychnine. We pinpointed 145 proteins sharing similar binding sites compared to the analysed bitter taste receptor and the enrichment analysis highlighted the related biological processes, molecular functions and cellular components. This work represents the foundation for future studies aimed at understanding the effective role of tastants outside the gustatory system: this could pave the way towards the rationalization of the diet as a supplement to standard pharmacological treatments and the design of novel tastants-inspired compounds to target other proteins involved in specific diseases or disorders. The proposed pipeline is publicly accessible, can be applied to any protein-ligand complex, and could be expanded to screen any database of protein structures.
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Affiliation(s)
- Lorenzo Pallante
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, PolitoBIOMedLab, 10129, Torino, Italy
| | - Marco Cannariato
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, PolitoBIOMedLab, 10129, Torino, Italy
| | | | - Eric A Zizzi
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, PolitoBIOMedLab, 10129, Torino, Italy
| | - Agorakis Bompotas
- Industrial Systems Institute, Athena Research Center, 265 04, Patras, Greece
| | - Xhesika Hada
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, PolitoBIOMedLab, 10129, Torino, Italy
| | - Gianvito Grasso
- Dalle Molle Institute for Artificial Intelligence IDSIA USI-SUPSI, 6962, Lugano-Viganello, Switzerland
| | | | - Seferina Mavroudi
- Department of Nursing, School of Health Rehabilitation Sciences, University of Patras, 265 04, Patras, Greece
| | | | | | - Marco A Deriu
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, PolitoBIOMedLab, 10129, Torino, Italy.
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45
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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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46
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Schiano E, Iannuzzo F, Stornaiuolo M, Guerra F, Tenore GC, Novellino E. Gengricin ®: A Nutraceutical Formulation for Appetite Control and Therapeutic Weight Management in Adults Who Are Overweight/Obese. Int J Mol Sci 2024; 25:2596. [PMID: 38473841 DOI: 10.3390/ijms25052596] [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: 01/30/2024] [Revised: 02/14/2024] [Accepted: 02/20/2024] [Indexed: 03/14/2024] Open
Abstract
In the field of nutritional science and metabolic disorders, there is a growing interest in natural bitter compounds capable of interacting with bitter taste receptors (TAS2Rs) useful for obesity management and satiety control. This study aimed to evaluate the effect of a nutraceutical formulation containing a combination of molecules appropriately designed to simultaneously target and stimulate these receptors. Specifically, the effect on CCK release exerted by a multi-component nutraceutical formulation (Cinchona bark, Chicory, and Gentian roots in a 1:1:1 ratio, named Gengricin®) was investigated in a CaCo-2 cell line, in comparison with Cinchona alone. In addition, these nutraceutical formulations were tested through a 3-month randomized controlled trial (RCT) conducted in subjects who were overweight-obese following a hypocaloric diet. Interestingly, the Gengricin® group exhibited a significant greater weight loss and improvement in body composition than the Placebo and Cinchona groups, indicating its effectiveness in promoting weight regulation. Additionally, the Gengricin® group reported higher satiety levels and a significant increase in serum CCK levels, suggesting a physiological basis for the observed effects on appetite control. Overall, these findings highlight the potential of natural nutraceutical strategies based on the combination of bitter compounds in modulating gut hormone release for effective appetite control and weight management.
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Affiliation(s)
- Elisabetta Schiano
- Inventia Biotech-Healthcare Food Research Center s.r.l., Strada Statale Sannitica KM 20.700, 81020 Caserta, Italy
| | - Fortuna Iannuzzo
- Department of Pharmacy, University of Chieti-Pescara G. D'Annunzio, 66100 Chieti, Italy
| | - Mariano Stornaiuolo
- Department of Pharmacy, University of Naples Federico II, Via Domenico Montesano 59, 80131 Naples, Italy
| | - Fabrizia Guerra
- NGN Healthcare-New Generation Nutraceuticals s.r.l., Torrette Via Nazionale 207, 83013 Mercogliano, Italy
| | - Gian Carlo Tenore
- Department of Pharmacy, University of Naples Federico II, Via Domenico Montesano 59, 80131 Naples, Italy
| | - Ettore Novellino
- Inventia Biotech-Healthcare Food Research Center s.r.l., Strada Statale Sannitica KM 20.700, 81020 Caserta, Italy
- Department of Medicine and Surgery, Catholic University of the Sacred Heart, 00168 Rome, Italy
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47
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Osakabe N, Shimizu T, Fujii Y, Fushimi T, Calabrese V. Sensory Nutrition and Bitterness and Astringency of Polyphenols. Biomolecules 2024; 14:234. [PMID: 38397471 PMCID: PMC10887135 DOI: 10.3390/biom14020234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 02/05/2024] [Accepted: 02/05/2024] [Indexed: 02/25/2024] Open
Abstract
Recent studies have demonstrated that the interaction of dietary constituents with taste and olfactory receptors and nociceptors expressed in the oral cavity, nasal cavity and gastrointestinal tract regulate homeostasis through activation of the neuroendocrine system. Polyphenols, of which 8000 have been identified to date, represent the greatest diversity of secondary metabolites in plants, most of which are bitter and some of them astringent. Epidemiological studies have shown that polyphenol intake contributes to maintaining and improving cardiovascular, cognitive and sensory health. However, because polyphenols have very low bioavailability, the mechanisms of their beneficial effects are unknown. In this review, we focused on the taste of polyphenols from the perspective of sensory nutrition, summarized the results of previous studies on their relationship with bioregulation and discussed their future potential.
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Affiliation(s)
- Naomi Osakabe
- Functional Control Systems, Graduate School of Engineering and Science, Shibaura Institute of Technology, Tokyo 135-8548, Japan
- Systems Engineering and Science, Graduate School of Engineering and Science, Shibaura Institute of Technology, Tokyo 135-8548, Japan;
- Department of Bio-Science and Engineering, Faculty of System Science and Engineering, Shibaura Institute of Technology, Tokyo 135-8548, Japan; (T.S.); (Y.F.)
| | - Takafumi Shimizu
- Department of Bio-Science and Engineering, Faculty of System Science and Engineering, Shibaura Institute of Technology, Tokyo 135-8548, Japan; (T.S.); (Y.F.)
| | - Yasuyuki Fujii
- Department of Bio-Science and Engineering, Faculty of System Science and Engineering, Shibaura Institute of Technology, Tokyo 135-8548, Japan; (T.S.); (Y.F.)
| | - Taiki Fushimi
- Systems Engineering and Science, Graduate School of Engineering and Science, Shibaura Institute of Technology, Tokyo 135-8548, Japan;
| | - Vittorio Calabrese
- Department of Biomedical and Biotechnological Sciences, University of Catania, 95125 Catania, Italy;
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48
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Tagliamonte S, Oliviero V, Vitaglione P. Food bioactive peptides: functionality beyond bitterness. Nutr Rev 2024:nuae008. [PMID: 38350613 DOI: 10.1093/nutrit/nuae008] [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] [Indexed: 02/15/2024] Open
Abstract
Bitter taste is an aversive taste because it is unconsciously associated with toxic compounds. However, a considerable variability in bitter sensitivity exists in those who have the genetic polymorphism for bitter taste receptors (TAS2Rs). Besides the oral cavity, TAS2Rs are present in many body tissues, including the gastrointestinal tract; therefore, they are crucial players both in the gustatory/hedonic system and in the homeostatic system, triggering numerous biological responses, including adipogenesis, carcinogenesis, or immunity. Bitter-tasting compounds are widely distributed in plant and animal foods and belong to many chemical classes. In this study, the evidence was reviewed on bitter peptides, considering the food sources, their formation in food under different processing and storage conditions and in the gastrointestinal tract during digestion, as well as their biological activities. Bitterness associated with peptides is due to the presence of hydrophobic amino acids in the C-terminus. The current literature mainly explores the enzymes and hydrolysis conditions, with the aim of reducing the formation of bitter peptides in hydrolysate preparation or food. Few studies highlight the bioactivity (namely, antihypertensive, antidiabetic, antioxidant, or immunity boosting), besides the bitterness. However, encapsulation of bitter peptides has been tentatively used to develop antihypertensive and antidiabetic supplements. In the era of personalized nutrition and precision medicine, the evidence available suggests the opportunity to use bitter bioactive peptides as functional ingredients in food. Such types of food may modulate a plethora of physiological mechanisms by targeting TAS2Rs in the gastrointestinal tract, thus modulating appetite sensations or gastrointestinal motility and discomfort according to individual nutritional needs and goals. More studies are needed to optimize the technological strategies to target TAS2Rs by bitter bioactive peptides, improve their stability in food, and validate the biological efficacy through well-designed in vivo studies.
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Affiliation(s)
- Silvia Tagliamonte
- Department of Agricultural Sciences, University of Naples Federico II, Portici, Italy
| | - Veronica Oliviero
- Department of Agricultural Sciences, University of Naples Federico II, Portici, Italy
| | - Paola Vitaglione
- Department of Agricultural Sciences, University of Naples Federico II, Portici, Italy
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49
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Scharf MM, Humphrys LJ, Berndt S, Di Pizio A, Lehmann J, Liebscher I, Nicoli A, Niv MY, Peri L, Schihada H, Schulte G. The dark sides of the GPCR tree - research progress on understudied GPCRs. Br J Pharmacol 2024. [PMID: 38339984 DOI: 10.1111/bph.16325] [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: 08/25/2023] [Revised: 11/24/2023] [Accepted: 01/08/2024] [Indexed: 02/12/2024] Open
Abstract
A large portion of the human GPCRome is still in the dark and understudied, consisting even of entire subfamilies of GPCRs such as odorant receptors, class A and C orphans, adhesion GPCRs, Frizzleds and taste receptors. However, it is undeniable that these GPCRs bring an untapped therapeutic potential that should be explored further. Open questions on these GPCRs span diverse topics such as deorphanisation, the development of tool compounds and tools for studying these GPCRs, as well as understanding basic signalling mechanisms. This review gives an overview of the current state of knowledge for each of the diverse subfamilies of understudied receptors regarding their physiological relevance, molecular mechanisms, endogenous ligands and pharmacological tools. Furthermore, it identifies some of the largest knowledge gaps that should be addressed in the foreseeable future and lists some general strategies that might be helpful in this process.
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Affiliation(s)
- Magdalena M Scharf
- Karolinska Institutet, Dept. Physiology & Pharmacology, Sec. Receptor Biology & Signaling, Stockholm, Sweden
| | - Laura J Humphrys
- Institute of Pharmacy, University of Regensburg, Regensburg, Germany
| | - Sandra Berndt
- Rudolf Schönheimer Institute for Biochemistry, Molecular Biochemistry, University of Leipzig, Leipzig, Germany
| | - Antonella Di Pizio
- Leibniz Institute for Food Systems Biology at the Technical University of Munich, Freising, Germany
- Chemoinformatics and Protein Modelling, Department of Molecular Life Science, School of Life Science, Technical University of Munich, Freising, Germany
| | - Juliane Lehmann
- Rudolf Schönheimer Institute for Biochemistry, Molecular Biochemistry, University of Leipzig, Leipzig, Germany
| | - Ines Liebscher
- Rudolf Schönheimer Institute for Biochemistry, Molecular Biochemistry, University of Leipzig, Leipzig, Germany
| | - Alessandro Nicoli
- Leibniz Institute for Food Systems Biology at the Technical University of Munich, Freising, Germany
- Chemoinformatics and Protein Modelling, Department of Molecular Life Science, School of Life Science, Technical University of Munich, Freising, Germany
| | - Masha Y Niv
- The Institute of Biochemistry, Food Science and Nutrition, Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Lior Peri
- The Institute of Biochemistry, Food Science and Nutrition, Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Hannes Schihada
- Institute of Pharmaceutical Chemistry, Philipps-University Marburg, Marburg, Germany
| | - Gunnar Schulte
- Karolinska Institutet, Dept. Physiology & Pharmacology, Sec. Receptor Biology & Signaling, Stockholm, Sweden
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50
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Ervina E, Berget I, Skeie SB, L. Almli V. Basic taste sensitivity, eating behaviour, food propensity and BMI of preadolescent children: How are they related? OPEN RESEARCH EUROPE 2024; 1:127. [PMID: 38433733 PMCID: PMC10904958 DOI: 10.12688/openreseurope.14117.3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Accepted: 01/15/2024] [Indexed: 03/05/2024]
Abstract
Background Taste sensitivity has been reported to influence children's eating behaviour and contribute to their food preferences and intake. This study aimed to investigate the associations between taste sensitivity, eating behaviour, food frequency and BMI (Body Mass Index) in preadolescents. Methods Preadolescents' taste sensitivity was measured by detection threshold of sweetness (sucrose), sourness (citric acid), saltiness (sodium chloride), bitterness (caffeine, quinine), and umami (monosodium glutamate). In addition, the Child Eating Behaviour Questionnaire (CEBQ), the Food Propensity Questionnaire (FPQ) measuring food frequency, and the children's body weight and height were completed by the parents. A total of 69 child-parent dyads participated (preadolescents mean age =10.9 years). Results Taste sensitivity to caffeine bitterness was significantly associated with eating behaviour in food responsiveness, emotional overeating, and desire to drink. The preadolescents who were less sensitive to caffeine bitterness had higher food responsiveness scores. Those who were less sensitive to caffeine bitterness and to sweetness had higher emotional overeating scores. In addition, preadolescents who were less sensitive to sourness and bitterness of both caffeine and quinine demonstrated to have higher scores in desire to drink. There was no association between taste sensitivity and FPQ, but significant differences were observed across preadolescents' BMI for FPQ of dairy food items, indicating higher consumption of low-fat milk in the overweight/obese compared to the underweight/normal-weight subjects. There was no significant difference in taste sensitivity according to BMI. Preadolescents' eating behaviour differed across BMI, demonstrating a positive association between BMI and food approach, and a negative association between BMI and food avoidance. Conclusions This study contributes to the preliminary understanding of the relationships between taste sensitivity and eating behaviour in preadolescents. The results may be used to develop effective strategies to promote healthy eating practices by considering taste sensitivity in preadolescents.
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Affiliation(s)
- Ervina Ervina
- Department of Sensory and Consumer Sciences, Nofima, Norwegian Institute of Food, Fisheries and Aquaculture Research, Ås, 1430, Norway
- Department of Chemistry, Biotechnology and Food Science (KBM), The Norwegian University of Life Science, Ås, 1433, Norway
- Food Technology Department, Faculty of Engineering, Bina Nusantara University, Jakarta, 11480, Indonesia
| | - Ingunn Berget
- Department of Raw Materials and Process Optimization, Nofima, Norwegian Institute of Food, Fisheries and Aquaculture Research, Ås, 1430, Norway
| | - Siv Borghild Skeie
- Department of Chemistry, Biotechnology and Food Science (KBM), The Norwegian University of Life Science, Ås, 1433, Norway
| | - Valérie L. Almli
- Department of Sensory and Consumer Sciences, Nofima, Norwegian Institute of Food, Fisheries and Aquaculture Research, Ås, 1430, Norway
- Department of Chemistry, Biotechnology and Food Science (KBM), The Norwegian University of Life Science, Ås, 1433, Norway
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