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Yamashita Y. Physiological functions of poorly absorbed polyphenols via the glucagon-like peptide-1. Biosci Biotechnol Biochem 2024; 88:493-498. [PMID: 38378922 DOI: 10.1093/bbb/zbae021] [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: 11/17/2023] [Accepted: 02/13/2024] [Indexed: 02/22/2024]
Abstract
Polyphenols are compounds of plant origin with several documented bioactivities related to health promotion. Some polyphenols are hard to be absorbed into the body due to their structural characteristics. This review focuses on the health beneficial effects of polyphenols mediated by intestinal hormones, particularly related to the systemic functions through the secretion of glucagon-like peptide-1 (GLP-1), an enteric hormone that stimulates postprandial insulin secretion. GLP-1 is secreted from L cells in the distal small intestine. Therefore, some poorly absorbed polyphenols are known to have the ability to act on the intestines and promote GLP-1 secretion. It has been reported that it not only reduces hyperglycemia but also prevents obesity by reduction of overeating and improves blood vessel function. This review discusses examples of health effects of polyphenols mediated by GLP-1 secretion.
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Affiliation(s)
- Yoko Yamashita
- Graduate School of Agricultural Science, Kobe University, Kobe, Hyogo, Japan
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2
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Dafne VJ, Manuel MA, Rocio CV. Chronobiotics, satiety signaling, and clock gene expression interplay. J Nutr Biochem 2024; 126:109564. [PMID: 38176625 DOI: 10.1016/j.jnutbio.2023.109564] [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: 07/24/2023] [Revised: 11/21/2023] [Accepted: 12/31/2023] [Indexed: 01/06/2024]
Abstract
The biological clock regulates the way our body works throughout the day, including releasing hormones and food intake. Disruption of the biological clock (chronodisruption) may deregulate satiety, which is strictly regulated by hormones and neurotransmitters, leading to health problems like obesity. Nowadays, using bioactive compounds as a coadjutant for several pathologies is a common practice. Phenolic compounds and short-chain fatty acids, called "chronobiotics," can modulate diverse mechanisms along the body to exert beneficial effects, including satiety regulation and circadian clock resynchronization; however, the evidence of the interplay between those processes is limited. This review compiles the evidence of natural chronobiotics, mainly polyphenols and short-chain fatty acids that affect the circadian clock mechanism and process modifications in genes or proteins resulting in a signaling chain that modulates satiety hormones or hunger pathways.
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Affiliation(s)
- Velásquez-Jiménez Dafne
- Research and Graduate Studies in Food Science, School of Chemistry, Autonomous University of Queretaro, Queretaro, Mexico
| | - Miranda-Anaya Manuel
- Multidisciplinary Unit for Teaching and Research (UMDI), School of Sciences, Autonomous National University of Mexico, Queretaro, Mexico
| | - Campos-Vega Rocio
- Research and Graduate Studies in Food Science, School of Chemistry, Autonomous University of Queretaro, Queretaro, Mexico.
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3
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Su W, Li Y, Chang AK, Sheng T, Pei Y, Li J, Li H, Liu K, Xu L, Liu W, Ai J, Zhang Z, Wang Y, Jiang Z, Liang X. Identification of Novel Alkaloids from Portulaca oleracea L. and Characterization of Their Pharmacokinetics and GLP-1 Secretion-Promoting Activity in STC-1 Cells. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:19804-19816. [PMID: 38038649 DOI: 10.1021/acs.jafc.3c05191] [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: 12/02/2023]
Abstract
Six new alkaloids (compounds 1-6) were isolated from Portulaca oleracea L. The compounds were triple pair (1 and 2, 3 and 4, and 5 and 6) enantiomers, with 1, 3, and 5 in the R-configuration and 2, 4, and 6 in the S-configuration, and all could bind to SUR1 according to molecular docking analysis. Treatment of STC-1 cells with each compound led to an influx of intracellular Ca2+, eventually leading to the secretion of glucagon-like peptide-1 (GLP-1), with compound 3 giving the highest secretion, resulting in 24.3 ± 7.03% more GLP-1 than nateglinide-treated cells, suggesting that these alkaloids may be able to reduce blood glucose based on their ability to stimulate the release of GLP-1. Furthermore, compound 3 also exhibited slightly faster absorption than nateglinide, as shown by pharmacokinetic analysis conducted in rats. Therefore, the results showed that some purslane alkaloids (such as compound 3) had good pharmacological activity in vivo and may have preventive and therapeutic effects on diabetes.
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Affiliation(s)
- Weiping Su
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Yanan Li
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Alan Kueichieh Chang
- College of Life and Environmental Sciences, Wenzhou University, Wenzhou, Zhejiang Province 325035, P.R. China
| | - Tongling Sheng
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Ying Pei
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Jianxin Li
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Haoran Li
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Kai Liu
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Liuping Xu
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Wenbao Liu
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Jiao Ai
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Zhicheng Zhang
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Yimeng Wang
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
| | - Zhen Jiang
- Department of Analytical Chemistry, College of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang, Liaoning Province 110016, P.R. China
| | - Xiao Liang
- School of Pharmaceutical Sciences, Liaoning University, 66 Chongshan Road, Shenyang, Liaoning Province 110036, P.R. China
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Taladrid D, Rebollo-Hernanz M, Martin-Cabrejas MA, Moreno-Arribas MV, Bartolomé B. Grape Pomace as a Cardiometabolic Health-Promoting Ingredient: Activity in the Intestinal Environment. Antioxidants (Basel) 2023; 12:antiox12040979. [PMID: 37107354 PMCID: PMC10135959 DOI: 10.3390/antiox12040979] [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: 04/03/2023] [Revised: 04/18/2023] [Accepted: 04/19/2023] [Indexed: 04/29/2023] Open
Abstract
Grape pomace (GP) is a winemaking by-product particularly rich in (poly)phenols and dietary fiber, which are the main active compounds responsible for its health-promoting effects. These components and their metabolites generated at the intestinal level have been shown to play an important role in promoting health locally and systemically. This review focuses on the potential bioactivities of GP in the intestinal environment, which is the primary site of interaction for food components and their biological activities. These mechanisms include (i) regulation of nutrient digestion and absorption (GP has been shown to inhibit enzymes such as α-amylase and α-glucosidase, protease, and lipase, which can help to reduce blood glucose and lipid levels, and to modulate the expression of intestinal transporters, which can also help to regulate nutrient absorption); (ii) modulation of gut hormone levels and satiety (GP stimulates GLP-1, PYY, CCK, ghrelin, and GIP release, which can help to regulate appetite and satiety); (iii) reinforcement of gut morphology (including the crypt-villi structures, which can improve nutrient absorption and protect against intestinal damage); (iv) protection of intestinal barrier integrity (through tight junctions and paracellular transport); (v) modulation of inflammation and oxidative stress triggered by NF-kB and Nrf2 signaling pathways; and (vi) impact on gut microbiota composition and functionality (leading to increased production of SCFAs and decreased production of LPS). The overall effect of GP within the gut environment reinforces the intestinal function as the first line of defense against multiple disorders, including those impacting cardiometabolic health. Future research on GP's health-promoting properties should consider connections between the gut and other organs, including the gut-heart axis, gut-brain axis, gut-skin axis, and oral-gut axis. Further exploration of these connections, including more human studies, will solidify GP's role as a cardiometabolic health-promoting ingredient and contribute to the prevention and management of cardiovascular diseases.
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Affiliation(s)
- Diego Taladrid
- Institute of Food Science Research (CIAL, CSIC-UAM), C/Nicolás Cabrera, 9, 28049 Madrid, Spain
| | - Miguel Rebollo-Hernanz
- Institute of Food Science Research (CIAL, CSIC-UAM), C/Nicolás Cabrera, 9, 28049 Madrid, Spain
- Department of Agricultural Chemistry and Food Science, Faculty of Science, C/Francisco Tomás y Valiente, 7, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Maria A Martin-Cabrejas
- Institute of Food Science Research (CIAL, CSIC-UAM), C/Nicolás Cabrera, 9, 28049 Madrid, Spain
- Department of Agricultural Chemistry and Food Science, Faculty of Science, C/Francisco Tomás y Valiente, 7, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | | | - Begoña Bartolomé
- Institute of Food Science Research (CIAL, CSIC-UAM), C/Nicolás Cabrera, 9, 28049 Madrid, Spain
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Sandner G, Stadlbauer V, Sadova N, Neuhauser C, Schwarzinger B, Karlsberger L, Hangweirer K, Antensteiner K, Stallinger A, Aumiller T, Weghuber J. Grape seed extract improves intestinal barrier integrity and performance: Evidence from in vitro, Caenorhabditis elegans and Drosophila melanogaster experiments and a study with growing broilers. FOOD BIOSCI 2023. [DOI: 10.1016/j.fbio.2023.102483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
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Qin W, Ying W, Hamaker B, Zhang G. Slow digestion-oriented dietary strategy to sustain the secretion of GLP-1 for improved glucose homeostasis. Compr Rev Food Sci Food Saf 2021; 20:5173-5196. [PMID: 34350681 DOI: 10.1111/1541-4337.12808] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 06/08/2021] [Accepted: 06/24/2021] [Indexed: 12/18/2022]
Abstract
Dysregulated glucose metabolism is associated with many chronic diseases such as obesity and type 2 diabetes mellitus (T2DM), and strategies to restore and maintain glucose homeostasis are essential to health. The incretin hormone of glucagon-like peptide-1 (GLP-1) is known to play a critical role in regulating glucose homeostasis and dietary nutrients are the primary stimuli to the release of intestinal GLP-1. However, the GLP-1 producing enteroendocrine L-cells are mainly distributed in the distal region of the gastrointestinal tract where there are almost no nutrients to stimulate the secretion of GLP-1 under normal situations. Thus, a dietary strategy to sustain the release of GLP-1 was proposed, and the slow digestion property and dipeptidyl peptidase IV (DPP-IV) inhibitory activity of food components, approaches to reduce the rate of food digestion, and mechanisms to sustain the release of GLP-1 were reviewed. A slow digestion-oriented dietary approach through encapsulation of nutrients, incorporation of viscous dietary fibers, and enzyme inhibitors of phytochemicals in a designed whole food matrix will be implemented to efficiently reduce the digestion rate of food nutrients, potentiate their distal deposition and a sustained secretion of GLP-1, which will be beneficial to improved glucose homeostasis and health.
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Affiliation(s)
- Wangyan Qin
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Wang Ying
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Bruce Hamaker
- Whistler Center for Carbohydrate Research, Purdue University, West Lafayette, Indiana, USA
| | - Genyi Zhang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
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Proanthocyanidins and Where to Find Them: A Meta-Analytic Approach to Investigate Their Chemistry, Biosynthesis, Distribution, and Effect on Human Health. Antioxidants (Basel) 2021; 10:antiox10081229. [PMID: 34439477 PMCID: PMC8389005 DOI: 10.3390/antiox10081229] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 07/26/2021] [Accepted: 07/27/2021] [Indexed: 12/22/2022] Open
Abstract
Proanthocyanidins (PACs) are a class of polyphenolic compounds that are attracting considerable interest in the nutraceutical field due to their potential health benefits. However, knowledge about the chemistry, biosynthesis, and distribution of PACs is limited. This review summarizes the main chemical characteristics and biosynthetic pathways and the main analytical methods aimed at their identification and quantification in raw plant matrices. Furthermore, meta-analytic approaches were used to identify the main plant sources in which PACs were contained and to investigate their potential effect on human health. In particular, a cluster analysis identified PACs in 35 different plant families and 60 different plant parts normally consumed in the human diet. On the other hand, a literature search, coupled with forest plot analyses, highlighted how PACs can be actively involved in both local and systemic effects. Finally, the potential mechanisms of action through which PACs may impact human health were investigated, focusing on their systemic hypoglycemic and lipid-lowering effects and their local anti-inflammatory actions on the intestinal epithelium. Overall, this review may be considered a complete report in which chemical, biosynthetic, ecological, and pharmacological aspects of PACs are discussed.
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Cremonini E, Daveri E, Mastaloudis A, Oteiza PI. (-)-Epicatechin and Anthocyanins Modulate GLP-1 Metabolism: Evidence from C57BL/6J Mice and GLUTag Cells. J Nutr 2021; 151:1497-1506. [PMID: 33693759 PMCID: PMC8659349 DOI: 10.1093/jn/nxab029] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 11/18/2020] [Accepted: 01/26/2021] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Generated in intestinal L cells through cleavage of proglucagon (Gcg), glucagon-like peptide 1 (GLP-1) is secreted and rapidly inactivated by dipeptidyl peptidase IV (DPP-IV). GLP-1 regulates insulin secretion and overall glucose homeostasis. The capacity of dietary bioactives to increase GLP-1 circulating levels, and therefore increase insulin secretion and glucose metabolism, has gained significant interest of late. OBJECTIVES We evaluated the effects of (-)-epicatechin (EC) and different anthocyanins (ACs) and AC metabolites on GLP-1 metabolism in mice and on GLUTag cells. METHODS We fed 6-week-old C57BL/6J male mice a control diet or a control diet supplemented with either 40 mg AC or 20 mg EC/kg body weight for 14 weeks (AC) or 15 weeks (EC). Intestinal mRNA levels of Gcg and Dpp-iv were measured. In vitro, GLUTag cells were incubated in the presence or absence of different ACs, the AC metabolite protocatechuic acid (PCA), and EC. GLP-1 secretion and the main pathways involved in its release were assessed. RESULTS Long-term supplementation with EC or AC increased mouse GLP-1 plasma concentrations (55% and 98%, respectively; P < 0.05). In mice, 1) EC and AC increased Gcg mRNA levels in the ileum (91%) and colon (41%), respectively (P < 0.05); and 2) AC lowered ileum Dpp-iv mRNA levels (35%), while EC decreased plasma DPP-IV activity (15%; P < 0.05). In GLUTag cells, 1) cyanidin, delphinidin, PCA, and EC increased GLP-1 secretion (53%, 33%, 53%, and 68%, respectively; P < 0.05); and 2) cyanidin, delphinidin, EC, and PCA increased cyclin adenosine monophosphate levels (25-50%; P < 0.05) and activated protein kinase A (PKA; 100%, 50%, 80%, and 86%, respectively; P < 0.05). CONCLUSIONS In mice, EC and ACs regulated different steps in GLP-1 regulation, leading to increased plasma GLP-1. Cyanidin, delphinidin, PCA, and EC promoted GLP-1 secretion from GLUTag cells by activating the PKA-dependent pathway. These findings support the beneficial actions of these flavonoids in sustaining intestinal and glucose homeostasis through the modulation of the GLP-1 metabolism.
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Affiliation(s)
- Eleonora Cremonini
- Department of Nutrition and of Environmental Toxicology, University of California, Davis, CA, USA
| | - Elena Daveri
- Department of Nutrition and of Environmental Toxicology, University of California, Davis, CA, USA
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9
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Wang Y, Alkhalidy H, Liu D. The Emerging Role of Polyphenols in the Management of Type 2 Diabetes. Molecules 2021; 26:molecules26030703. [PMID: 33572808 PMCID: PMC7866283 DOI: 10.3390/molecules26030703] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 01/25/2021] [Accepted: 01/26/2021] [Indexed: 12/12/2022] Open
Abstract
Type 2 diabetes (T2D) is a fast-increasing health problem globally, and it results from insulin resistance and pancreatic β-cell dysfunction. The gastrointestinal (GI) tract is recognized as one of the major regulatory organs of glucose homeostasis that involves multiple gut hormones and microbiota. Notably, the incretin hormone glucagon-like peptide-1 (GLP-1) secreted from enteroendocrine L-cells plays a pivotal role in maintaining glucose homeostasis via eliciting pleiotropic effects, which are largely mediated via its receptor. Thus, targeting the GLP-1 signaling system is a highly attractive therapeutic strategy to treatment T2D. Polyphenols, the secondary metabolites from plants, have drawn considerable attention because of their numerous health benefits, including potential anti-diabetic effects. Although the major targets and locations for the polyphenolic compounds to exert the anti-diabetic action are still unclear, the first organ that is exposed to these compounds is the GI tract in which polyphenols could modulate enzymes and hormones. Indeed, emerging evidence has shown that polyphenols can stimulate GLP-1 secretion, indicating that these natural compounds might exert metabolic action at least partially mediated by GLP-1. This review provides an overview of nutritional regulation of GLP-1 secretion and summarizes recent studies on the roles of polyphenols in GLP-1 secretion and degradation as it relates to metabolic homeostasis. In addition, the effects of polyphenols on microbiota and microbial metabolites that could indirectly modulate GLP-1 secretion are also discussed.
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Affiliation(s)
- Yao Wang
- Department of Human Nutrition, Foods and Exercise, College of Agricultural and Life Sciences, Virginia Tech, Blacksburg, VA 24060, USA;
| | - Hana Alkhalidy
- Department of Nutrition and Food Technology, Jordan University of Science and Technology, Irbid 22110, Jordan;
| | - Dongmin Liu
- Department of Human Nutrition, Foods and Exercise, College of Agricultural and Life Sciences, Virginia Tech, Blacksburg, VA 24060, USA;
- Correspondence: ; Tel.: +1-540-231-3402; Fax: +1-540-231-3916
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10
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Proanthocyanidins Should Be a Candidate in the Treatment of Cancer, Cardiovascular Diseases and Lipid Metabolic Disorder. Molecules 2020; 25:molecules25245971. [PMID: 33339407 PMCID: PMC7766935 DOI: 10.3390/molecules25245971] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 12/07/2020] [Accepted: 12/09/2020] [Indexed: 12/15/2022] Open
Abstract
The conventional view of using medicines as routine treatment of an intractable disease is being challenged in the face of extensive and growing evidence that flavonoids in foods, especially proanthocyanidins (PAs), can participate in tackling fatal diseases like cancer, cardiovascular and lipid metabolic diseases, both as a precautionary measure or as a dietary treatment. Although medical treatment with medicines will remain necessary in some cases, at least in the short term, PAs’ function as antioxidant, anti-inflammatory drugs, signal pathway regulators remain critical in many diseases. This review article demonstrates the physical and biological properties of PAs, summarizes the health benefits of PAs found by researchers previously, and shows the possibility and importance of being a dietary treatment substance.
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Rambaran TF, Bergman J, Nordström P, Nordström A. Effect of Berry Polyphenols on Glucose Metabolism: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Curr Dev Nutr 2020; 4:nzaa100. [PMID: 32666033 PMCID: PMC7326477 DOI: 10.1093/cdn/nzaa100] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 05/20/2020] [Accepted: 05/22/2020] [Indexed: 12/17/2022] Open
Abstract
The effect of berry polyphenols on glucose metabolism has been evaluated in several studies; however, the results are conflicting. A systematic review and meta-analysis was therefore conducted to evaluate the effect of berry polyphenol consumption on glucose metabolism in adults with impaired glucose tolerance or insulin resistance. PubMed/MEDLINE, Cochrane Central Register of Controlled Trials, CINAHL (EBSCO), and Scopus were searched for randomized controlled trials published by June 2019. Of the 3240 articles found, 21 met inclusion criteria. Study-specific effects were calculated as mean differences, which were pooled using fixed-effect, inverse-variance weighting. Overall, berry polyphenol consumption did not have a clear effect on biomarkers of glucose metabolism compared with placebo or no treatment. Although some analyses showed statistically significant effects, these effects were too small to be of clinical relevance. The review protocol was registered in the PROSPERO International Prospective Register of Systematic Reviews as CRD42019130811.
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Affiliation(s)
- Theresa F Rambaran
- Department of Public Health and Clinical Medicine, Section of Sustainable Health, Umeå University, Umeå, Sweden
| | - Jonathan Bergman
- Department of Community Medicine and Rehabilitation, Unit of Geriatric Medicine, Umeå University, Umeå, Sweden
| | - Peter Nordström
- Department of Community Medicine and Rehabilitation, Unit of Geriatric Medicine, Umeå University, Umeå, Sweden
| | - Anna Nordström
- Department of Public Health and Clinical Medicine, Section of Sustainable Health, Umeå University, Umeå, Sweden
- School of Sport Sciences, UiT Arctic University of Norway, Tromsö, Norway
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12
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Grau-Bové C, González-Quilen C, Terra X, Blay MT, Beltrán-Debón R, Jorba-Martín R, Espina B, Pinent M, Ardévol A. Effects of Flavanols on Enteroendocrine Secretion. Biomolecules 2020; 10:biom10060844. [PMID: 32492958 PMCID: PMC7355421 DOI: 10.3390/biom10060844] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 05/26/2020] [Accepted: 05/29/2020] [Indexed: 12/23/2022] Open
Abstract
Some beneficial effects of grape seed proanthocyanidin extract (GSPE) can be explained by the modulation of enterohormone secretion. As GSPE comprises a combination of different molecules, the pure compounds that cause these effects need to be elucidated. The enterohormones and chemoreceptors present in the gastrointestinal tract differ between species, so if humans are to gain beneficial effects, species closer to humans-and humans themselves-must be used. We demonstrate that 100 mg/L of GSPE stimulates peptide YY (PYY) release, but not glucagon-like peptide 1 (GLP-1) release in the human colon. We used a pig ex vivo system that differentiates between apical and basolateral intestinal sides to analyse how apical stimulation with GSPE and its pure compounds affects the gastrointestinal tract. In pigs, apical GSPE treatment stimulates the basolateral release of PYY in the duodenum and colon and that of GLP-1 in the ascending, but not the descending colon. In the duodenum, luminal stimulation with procyanidin dimer B2 increased PYY secretion, but not CCK secretion, while catechin monomers (catechin/epicatechin) significantly increased CCK release, but not PYY release. The differential effects of GSPE and its pure compounds on enterohormone release at the same intestinal segment suggest that they act through chemosensors located apically and unevenly distributed along the gastrointestinal tract.
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Affiliation(s)
- Carme Grau-Bové
- MoBioFood Research Group, Departament de Bioquímica i Biotecnologia, Universitat Rovira i Virgili, c/Marcel·lí Domingo nº1, 43007 Tarragona, Spain; (C.G.-B.); (C.G.-Q.); (X.T.); (M.T.B.); (R.B.-D.); (A.A.)
| | - Carlos González-Quilen
- MoBioFood Research Group, Departament de Bioquímica i Biotecnologia, Universitat Rovira i Virgili, c/Marcel·lí Domingo nº1, 43007 Tarragona, Spain; (C.G.-B.); (C.G.-Q.); (X.T.); (M.T.B.); (R.B.-D.); (A.A.)
| | - Ximena Terra
- MoBioFood Research Group, Departament de Bioquímica i Biotecnologia, Universitat Rovira i Virgili, c/Marcel·lí Domingo nº1, 43007 Tarragona, Spain; (C.G.-B.); (C.G.-Q.); (X.T.); (M.T.B.); (R.B.-D.); (A.A.)
- Institut d’Investigació Sanitària Pere Virgili (IISPV), 43005 Tarragona, Spain; (R.J.-M.); (B.E.)
| | - M. Teresa Blay
- MoBioFood Research Group, Departament de Bioquímica i Biotecnologia, Universitat Rovira i Virgili, c/Marcel·lí Domingo nº1, 43007 Tarragona, Spain; (C.G.-B.); (C.G.-Q.); (X.T.); (M.T.B.); (R.B.-D.); (A.A.)
- Institut d’Investigació Sanitària Pere Virgili (IISPV), 43005 Tarragona, Spain; (R.J.-M.); (B.E.)
| | - Raul Beltrán-Debón
- MoBioFood Research Group, Departament de Bioquímica i Biotecnologia, Universitat Rovira i Virgili, c/Marcel·lí Domingo nº1, 43007 Tarragona, Spain; (C.G.-B.); (C.G.-Q.); (X.T.); (M.T.B.); (R.B.-D.); (A.A.)
- Institut d’Investigació Sanitària Pere Virgili (IISPV), 43005 Tarragona, Spain; (R.J.-M.); (B.E.)
| | - Rosa Jorba-Martín
- Institut d’Investigació Sanitària Pere Virgili (IISPV), 43005 Tarragona, Spain; (R.J.-M.); (B.E.)
- Servei de Cirurgia General i de l’Aparell Digestiu, Hospital Universitari Joan XXIII, 43005 Tarragona, Spain
| | - Beatriz Espina
- Institut d’Investigació Sanitària Pere Virgili (IISPV), 43005 Tarragona, Spain; (R.J.-M.); (B.E.)
- Servei de Cirurgia General i de l’Aparell Digestiu, Hospital Universitari Joan XXIII, 43005 Tarragona, Spain
| | - Montserrat Pinent
- MoBioFood Research Group, Departament de Bioquímica i Biotecnologia, Universitat Rovira i Virgili, c/Marcel·lí Domingo nº1, 43007 Tarragona, Spain; (C.G.-B.); (C.G.-Q.); (X.T.); (M.T.B.); (R.B.-D.); (A.A.)
- Institut d’Investigació Sanitària Pere Virgili (IISPV), 43005 Tarragona, Spain; (R.J.-M.); (B.E.)
- Correspondence: ; Tel.: +34-97-755-9566
| | - Anna Ardévol
- MoBioFood Research Group, Departament de Bioquímica i Biotecnologia, Universitat Rovira i Virgili, c/Marcel·lí Domingo nº1, 43007 Tarragona, Spain; (C.G.-B.); (C.G.-Q.); (X.T.); (M.T.B.); (R.B.-D.); (A.A.)
- Institut d’Investigació Sanitària Pere Virgili (IISPV), 43005 Tarragona, Spain; (R.J.-M.); (B.E.)
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Márquez Campos E, Jakobs L, Simon MC. Antidiabetic Effects of Flavan-3-ols and Their Microbial Metabolites. Nutrients 2020; 12:nu12061592. [PMID: 32485837 PMCID: PMC7352288 DOI: 10.3390/nu12061592] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 05/17/2020] [Accepted: 05/26/2020] [Indexed: 12/11/2022] Open
Abstract
Diet is one of the pillars in the prevention and management of diabetes mellitus. Particularly, eating patterns characterized by a high consumption of foods such as fruits or vegetables and beverages such as coffee and tea could influence the development and progression of type 2 diabetes. Flavonoids, whose intake has been inversely associated with numerous negative health outcomes in the last few years, are a common constituent of these food items. Therefore, they could contribute to the observed positive effects of certain dietary habits in individuals with type 2 diabetes. Of all the different flavonoid subclasses, flavan-3-ols are consumed the most in the European region. However, a large proportion of the ingested flavan-3-ols is not absorbed. Therefore, the flavan-3-ols enter the large intestine where they become available to the colonic bacteria and are metabolized by the microbiota. For this reason, in addition to the parent compounds, the colonic metabolites of flavan-3-ols could take part in the prevention and management of diabetes. The aim of this review is to present the available literature on the effect of both the parent flavan-3-ol compounds found in different food sources as well as the specific microbial metabolites of diabetes in order to better understand their potential role in the prevention and treatment of the disease.
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Yang K, Yang Y, Qi C, Ju H. Effects of porcine STC-1 on cell metabolism and mitochondrial function. Gen Comp Endocrinol 2020; 286:113298. [PMID: 31606465 DOI: 10.1016/j.ygcen.2019.113298] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 10/09/2019] [Indexed: 12/25/2022]
Abstract
Stanniocalcin (STC-1), a kind of glycoprotein hormone, was first found in fish and mainly regulates calcium/phosphorus metabolism in the body. To explore the biological function of the porcine STC-1 gene, the effects of changes in stanniocalcin expression on cellular metabolism and mitochondrial function were studied. A vector overexpressing the STC-1 gene and an siRNA silencer of the STC-1 gene were transfected into porcine kidney epithelial PK15 cells. After the STC-1 gene expression level was induced to change, STC-1 protein- and mitochondrial function-related proteins such as PMP70, OPA, DRP, Mfn and STC-1-related acetylated protein were detected by Western blotting. Cell apoptosis, mitochondrial membrane potential, reactive oxygen species (ROS), and ATP were detected using flow cytometry methods. Transmission electron microscopy was used to observe the changes in mitochondrial structure and morphology. The results showed that overexpression of the STC-1 gene could significantly upregulate the levels of PMP70, OPA, DRP and Mfn. STC-1 gene expression, which could decrease the apoptosis rate and reactive oxygen species production to significantly increase the cell membrane potential and reduce the formation of intracellular ATP, which also affected the morphology and number of mitochondria. The results were reversed when the STC-1 gene expression was silenced. The results suggested that the porcine STC-1 gene is closely related to cell growth metabolism and mitochondrial function, which influence the mitochondrial function-related proteins. The present study is useful for further understanding STC-1 gene function and provides a theoretical basis for improving the production characteristics of domestic pigs.
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Affiliation(s)
- Kaidian Yang
- College of Veterinary Medicine, Yangzhou University/Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou 225009, Jiangsu, People's Republic of China; College of Animal Science and Technology, Jilin Agricultural University/Jilin Provincial Engineering Research Center of Animal Probiotics, Changchun 130118, Jilin, People's Republic of China
| | - Yuefei Yang
- College of Veterinary Medicine, Yangzhou University/Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou 225009, Jiangsu, People's Republic of China
| | - Chuanxiang Qi
- College of Veterinary Medicine, Yangzhou University/Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou 225009, Jiangsu, People's Republic of China; College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210000, People's Republic of China
| | - Huiming Ju
- College of Veterinary Medicine, Yangzhou University/Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou 225009, Jiangsu, People's Republic of China.
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15
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Villa-Rodriguez JA, Ifie I, Gonzalez-Aguilar GA, Roopchand DE. The Gastrointestinal Tract as Prime Site for Cardiometabolic Protection by Dietary Polyphenols. Adv Nutr 2019; 10:999-1011. [PMID: 31144710 PMCID: PMC6855987 DOI: 10.1093/advances/nmz038] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 12/14/2018] [Accepted: 03/19/2019] [Indexed: 02/07/2023] Open
Abstract
Substantial evidence from nutritional epidemiology links polyphenol-rich diets with reduced incidence of chronic disorders; however, biological mechanisms underlying polyphenol-disease relations remain enigmatic. Emerging evidence is beginning to unmask the contribution of the gastrointestinal tract on whole-body energy homeostasis, suggesting that the intestine may be a prime target for intervention and a fundamental site for the metabolic actions of polyphenols. During their transit through the gastrointestinal tract, polyphenols may activate enteric nutrient sensors ensuing appropriate responses from other peripheral organs to regulate metabolic homeostasis. Furthermore, polyphenols can modulate the absorption of glucose, attenuating exaggerated hormonal responses and metabolic imbalances. Polyphenols that escape absorption are metabolized by the gut microbiota and the resulting catabolites may act locally, activating nuclear receptors that control enteric functions such as intestinal permeability. Finally, polyphenols modulate gut microbial ecology, which can have profound effects on cardiometabolic health.
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Affiliation(s)
- Jose A Villa-Rodriguez
- Institute for Food, Nutrition, and Health, Center for Nutrition, Microbiome, and Health, Rutgers, The State University of New Jersey, New Brunswick, NJ,Address correspondence to JAV-R (e-mail: )
| | - Idolo Ifie
- Department of Food Science and Technology, Delta State University, Abraka, Nigeria
| | - Gustavo A Gonzalez-Aguilar
- Coordinación de Tecnología de Alimentos de Origen Vegetal, Centro de Investigación en Alimentación y Desarrollo A. C., Sonora, Mexico
| | - Diana E Roopchand
- Institute for Food, Nutrition, and Health, Center for Nutrition, Microbiome, and Health, Rutgers, The State University of New Jersey, New Brunswick, NJ,Address correspondence to DER (e-mail: )
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16
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Aroma compound diacetyl suppresses glucagon-like peptide-1 production and secretion in STC-1 cells. Food Chem 2017; 228:35-42. [DOI: 10.1016/j.foodchem.2017.01.104] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 12/07/2016] [Accepted: 01/19/2017] [Indexed: 12/12/2022]
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17
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Casanova-Martí À, Serrano J, Blay MT, Terra X, Ardévol A, Pinent M. Acute selective bioactivity of grape seed proanthocyanidins on enteroendocrine secretions in the gastrointestinal tract. Food Nutr Res 2017; 61:1321347. [PMID: 28659730 PMCID: PMC5475339 DOI: 10.1080/16546628.2017.1321347] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Accepted: 04/11/2017] [Indexed: 01/08/2023] Open
Abstract
Background: Enteroendocrine cells respond to food components by secreting an array of hormones that regulate several functions. We have previously shown that grape seed proanthocyanidins (GSPE) modulate GLP-1 levels. Objective: To deepen on the knowledge of the mechanisms used by GSPE to increase GLP-1, and extend it to its role at modulation of other enterohormones. Design: We used an ex vivo system to test direct modulation of enterohormones; STC-1 cells to test pure phenolic compounds; and rats to test the effects at different gastrointestinal segments. Results: GSPE compounds act at several locations along the gastrointestinal tract modulating enterohormone secretion depending on the feeding condition. GSPE directly promotes GLP-1 secretion in the ileum, while unabsorbed/metabolized forms do so in the colon. Such stimulation requires the presence of glucose. GSPE enhanced GIP and reduced CCK secretion; gallic acid could be partly responsible for this effect. Conclusions: The activity of GSPE modulating enterohormone secretion may help to explain its effects on metabolism. GSPE acts through several mechanisms; its compounds and their metabolites are GLP-1 secretagogues in ileum and colon, respectively. In vivo GLP-1 secretion might also be mediated by indirect pathways involving modulation of other enterohormones that in turn regulate GLP-1 release.
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Affiliation(s)
- Àngela Casanova-Martí
- MoBioFood Research Group. Departament de Bioquímica i Biotecnologia, Universitat Rovira i Virgili, Tarragona, Spain
| | - Joan Serrano
- MoBioFood Research Group. Departament de Bioquímica i Biotecnologia, Universitat Rovira i Virgili, Tarragona, Spain
| | - M Teresa Blay
- MoBioFood Research Group. Departament de Bioquímica i Biotecnologia, Universitat Rovira i Virgili, Tarragona, Spain
| | - Ximena Terra
- MoBioFood Research Group. Departament de Bioquímica i Biotecnologia, Universitat Rovira i Virgili, Tarragona, Spain
| | - Anna Ardévol
- MoBioFood Research Group. Departament de Bioquímica i Biotecnologia, Universitat Rovira i Virgili, Tarragona, Spain
| | - Montserrat Pinent
- MoBioFood Research Group. Departament de Bioquímica i Biotecnologia, Universitat Rovira i Virgili, Tarragona, Spain
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18
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Domínguez Avila JA, Rodrigo García J, González Aguilar GA, de la Rosa LA. The Antidiabetic Mechanisms of Polyphenols Related to Increased Glucagon-Like Peptide-1 (GLP1) and Insulin Signaling. Molecules 2017; 22:molecules22060903. [PMID: 28556815 PMCID: PMC6152752 DOI: 10.3390/molecules22060903] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 05/24/2017] [Accepted: 05/26/2017] [Indexed: 02/07/2023] Open
Abstract
Type-2 diabetes mellitus (T2DM) is an endocrine disease related to impaired/absent insulin signaling. Dietary habits can either promote or mitigate the onset and severity of T2DM. Diets rich in fruits and vegetables have been correlated with a decreased incidence of T2DM, apparently due to their high polyphenol content. Polyphenols are compounds of plant origin with several documented bioactivities related to health promotion. The present review describes the antidiabetic effects of polyphenols, specifically related to the secretion and effects of insulin and glucagon-like peptide 1 (GLP1), an enteric hormone that stimulates postprandial insulin secretion. The evidence suggests that polyphenols from various sources stimulate L-cells to secrete GLP1, increase its half-life by inhibiting dipeptidyl peptidase-4 (DPP4), stimulate β-cells to secrete insulin and stimulate the peripheral response to insulin, increasing the overall effects of the GLP1-insulin axis. The glucose-lowering potential of polyphenols has been evidenced in various acute and chronic models of healthy and diabetic organisms. Some polyphenols appear to exert their effects similarly to pharmaceutical antidiabetics; thus, rigorous clinical trials are needed to fully validate this claim. The broad diversity of polyphenols has not allowed for entirely describing their mechanisms of action, but the evidence advocates for their regular consumption.
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Affiliation(s)
- J Abraham Domínguez Avila
- Coordinación de Tecnología de Alimentos de Origen Vegetal, Centro de Investigación en Alimentación y Desarrollo A. C., Carretera a La Victoria km 0.6, AP 1735, Hermosillo 83304, Sonora, Mexico.
| | - Joaquín Rodrigo García
- Departamento de Ciencias de la Salud, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Anillo Envolvente del PRONAF y Estocolmo s/n, Ciudad Juárez 32310, Chihuahua, Mexico.
| | - Gustavo A González Aguilar
- Coordinación de Tecnología de Alimentos de Origen Vegetal, Centro de Investigación en Alimentación y Desarrollo A. C., Carretera a La Victoria km 0.6, AP 1735, Hermosillo 83304, Sonora, Mexico.
| | - Laura A de la Rosa
- Departamento de Ciencias Químico-Biológicas, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Anillo Envolvente del PRONAF y Estocolmo s/n, Ciudad Juárez 32310, Chihuahua, Mexico.
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19
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Serrano J, Casanova-Martí À, Gil-Cardoso K, Blay MT, Terra X, Pinent M, Ardévol A. Acutely administered grape-seed proanthocyanidin extract acts as a satiating agent. Food Funct 2016; 7:483-90. [PMID: 26514231 DOI: 10.1039/c5fo00892a] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Grape-seed proanthocyanidins' role as stimulators of active GLP-1 in rats suggests that they could be effective as satiating agents. Wistar rats were used to study the effects of proanthocyanidins on food intake with different doses, administration times and proanthocyanidin extract compositions. A dose of 423 mg of phenolics per kg body weight (BW) of grape-seed proanthocyanidin extract (GSPE) was necessary to decrease the 12-hour cumulative food intake by 18.7 ± 3.4%. Proanthocyanidins were effective when delivered directly into the gastrointestinal tract one hour before, or simultaneously at the start of the feeding period. Proanthocyanidins without galloyl forms, such as those from cocoa extract, were not as effective as grape-seed derived forms. GSPE increased the portal levels of active GLP-1 and total ghrelin and decreased the CCK levels, simultaneously with a decrease in gastric emptying. In conclusion, grape-seed proanthocyanidins could be useful as a satiating agent under the conditions defined in this study.
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Affiliation(s)
- Joan Serrano
- Universitat Rovira i Virgili, Biochemistry and Biotechnology Department, c/Marcel lí Domingo no. 1, 43007, Tarragona, Spain.
| | - Àngela Casanova-Martí
- Universitat Rovira i Virgili, Biochemistry and Biotechnology Department, c/Marcel lí Domingo no. 1, 43007, Tarragona, Spain.
| | - Katherine Gil-Cardoso
- Universitat Rovira i Virgili, Biochemistry and Biotechnology Department, c/Marcel lí Domingo no. 1, 43007, Tarragona, Spain.
| | - M Teresa Blay
- Universitat Rovira i Virgili, Biochemistry and Biotechnology Department, c/Marcel lí Domingo no. 1, 43007, Tarragona, Spain.
| | - Ximena Terra
- Universitat Rovira i Virgili, Biochemistry and Biotechnology Department, c/Marcel lí Domingo no. 1, 43007, Tarragona, Spain.
| | - Montserrat Pinent
- Universitat Rovira i Virgili, Biochemistry and Biotechnology Department, c/Marcel lí Domingo no. 1, 43007, Tarragona, Spain.
| | - Anna Ardévol
- Universitat Rovira i Virgili, Biochemistry and Biotechnology Department, c/Marcel lí Domingo no. 1, 43007, Tarragona, Spain.
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20
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Haufe TC, Gilley AD, Goodrich KM, Ryan CM, Smithson AT, Hulver MW, Liu D, Neilson AP. Grape powder attenuates the negative effects of GLP-1 receptor antagonism by exendin-3 (9–39) in a normoglycemic mouse model. Food Funct 2016; 7:2692-705. [DOI: 10.1039/c6fo00122j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Acute oral administration of grape powder attenuates the hyperglycemic effects of GLP-1 receptor antagonism in rats.
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Affiliation(s)
- T. C. Haufe
- Department of Food Science and Technology
- Virginia Polytechnic Institute and State University
- Blacksburg
- USA
| | - A. D. Gilley
- Department of Food Science and Technology
- Virginia Polytechnic Institute and State University
- Blacksburg
- USA
| | - K. M. Goodrich
- Department of Food Science and Technology
- Virginia Polytechnic Institute and State University
- Blacksburg
- USA
| | - C. M. Ryan
- Department of Food Science and Technology
- Virginia Polytechnic Institute and State University
- Blacksburg
- USA
| | - A. T. Smithson
- Department of Food Science and Technology
- Virginia Polytechnic Institute and State University
- Blacksburg
- USA
| | - M. W. Hulver
- Department of Human Nutrition
- Foods and Exercise
- Virginia Polytechnic Institute and State University
- Blacksburg
- USA
| | - D. Liu
- Department of Human Nutrition
- Foods and Exercise
- Virginia Polytechnic Institute and State University
- Blacksburg
- USA
| | - A. P. Neilson
- Department of Food Science and Technology
- Virginia Polytechnic Institute and State University
- Blacksburg
- USA
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21
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Tsuda T. Possible abilities of dietary factors to prevent and treat diabetes via the stimulation of glucagon-like peptide-1 secretion. Mol Nutr Food Res 2015; 59:1264-73. [PMID: 25707985 DOI: 10.1002/mnfr.201400871] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Revised: 02/01/2015] [Accepted: 02/09/2015] [Indexed: 12/22/2022]
Abstract
There is a pressing need for countermeasures against diabetes, which has increased in incidence, becoming a global issue. Glucagon-like peptide-1 (GLP-1), a molecule secreted in enteroendocrine L cells in the lower small and large intestines, is thought to be one of the most important molecular targets for the prevention and treatment of diabetes. There has been increasing interest in the possible ability of dietary factors to treat diabetes via modulating GLP-1 secretion. There is thought to be a close relationship between incretin and diet, and the purported best approach for using dietary factors to increase GLP-1 activity is promotion of secretion of endogenous GLP-1. It have been reported that nutrients as well as various non-nutrient dietary factors can function as GLP-1 secretogogues. Here, we present our findings on the GLP-1 secretion-stimulating functions of two dietary factors, curcumin and extract of edible sweet potato leaves, which contain caffeoylquinic acid derivatives. However, it is necessary to reveal in greater detail the stimulation of GLP-1 secretion by dietary factors for preventing and treating diabetes. It is desirable to clarify the exact GLP-1 secretory pathway, the effect of metabolites derived from dietary factors in gut lumen, and the relationship between incretin and meal.
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Affiliation(s)
- Takanori Tsuda
- College of Bioscience and Biotechnology, Chubu University, Kasugai, Aichi, Japan
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22
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Kuwahara A. Contributions of colonic short-chain Fatty Acid receptors in energy homeostasis. Front Endocrinol (Lausanne) 2014; 5:144. [PMID: 25228897 PMCID: PMC4150999 DOI: 10.3389/fendo.2014.00144] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Accepted: 08/19/2014] [Indexed: 12/12/2022] Open
Abstract
The gastrointestinal (GI) tract is separated from the body's internal environment by a single layer of epithelial cells, through which nutrients must pass for their absorption into the bloodstream. Besides food and drink, the GI lumen is also exposed to bioactive chemicals and bacterial products including short-chain fatty acids (SCFAs). Therefore, the GI tract has to monitor the composition of its contents continuously to discriminate between necessary and unnecessary compounds. Recent molecular identification of epithelial membrane receptor proteins has revealed the sensory roles of intestinal epithelial cells in the gut chemosensory system. Malfunctioning of these receptors may be responsible for a variety of metabolic dysfunctions associated with obesity and related disorders. Recent studies suggest that SCFAs produced by microbiota fermentation act as signaling molecules and influence the host's metabolism; uncovering the sensory mechanisms of such bacterial metabolites would help us understand the interactions between the host and microbiota in host energy homeostasis. In this review, the contribution of colonic SCFA receptors in energy metabolism and our recent findings concerning the possible link between SCFA receptors and host energy homeostasis are discussed.
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Affiliation(s)
- Atsukazu Kuwahara
- Laboratory of Physiology, Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, Shizuoka, Japan
- *Correspondence: Atsukazu Kuwahara, Laboratory of Physiology, Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan e-mail:
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