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Nakadate K, Kawakami K, Yamazaki N. Combined Ingestion of Tea Catechin and Citrus β-Cryptoxanthin Improves Liver Function via Adipokines in Chronic Obesity. Nutrients 2023; 15:3345. [PMID: 37571282 PMCID: PMC10421220 DOI: 10.3390/nu15153345] [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: 06/09/2023] [Revised: 07/12/2023] [Accepted: 07/25/2023] [Indexed: 08/13/2023] Open
Abstract
Recently, there has been an increase in the number of obese individuals, which has elevated the risk of related diseases. Although several studies have been performed to develop a definitive treatment for obesity, no solution has yet been achieved. Recent evidence suggests that tea catechins possess antiobesity effects; however, an impractical amount of catechin may be required to achieve antiobesity effects in humans. Moreover, studies are yet to elucidate the effects of the combined treatment of tea catechins with other substances. Here, we investigated the synergistic effects of catechins and β-cryptoxanthin in high-calorie diet-induced mice. Combined treatment with catechins and β-cryptoxanthin significantly suppressed obesity-induced weight gain and adipocyte size and area, restoring serum parameters to normal. Additionally, combined treatment with catechins and β-cryptoxanthin suppressed inflammatory responses in adipocytes, restored adiponectin levels to normal, protected the liver against obesity-induced damage, and restored normal liver function. Moreover, activin E level was restored to normal, possibly affecting the energy metabolism of brown adipocytes. Overall, these results suggest that the combined ingestion of tea catechins and β-cryptoxanthin was not only effective against obesity but may also help to prevent obesity-related diseases, such as diabetes and cardiovascular diseases.
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Affiliation(s)
- Kazuhiko Nakadate
- Department of Basic Science, Educational and Research Center for Pharmacy, Meiji Pharmaceutical University, 2-522-1, Noshio, Kiyose 204-8588, Tokyo, Japan;
| | - Kiyoharu Kawakami
- Department of Basic Science, Educational and Research Center for Pharmacy, Meiji Pharmaceutical University, 2-522-1, Noshio, Kiyose 204-8588, Tokyo, Japan;
| | - Noriko Yamazaki
- Department of Community Health Care and Sciences, Meiji Pharmaceutical University, 2-522-1, Noshio, Kiyose 204-8588, Tokyo, Japan;
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2
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Moon YJ, Kim HS, Kim MJ, Im HY, Lee YH. Synergistic Effects of Heat-Treated Green Tea Extract and Enzymatically-Modified Isoquercitrin in Preventing Obesity. Nutrients 2023; 15:2931. [PMID: 37447257 DOI: 10.3390/nu15132931] [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: 05/27/2023] [Revised: 06/18/2023] [Accepted: 06/20/2023] [Indexed: 07/15/2023] Open
Abstract
Previous research has shown that both heat-treated green tea extract (HTGT) and enzymatically modified isoquercitrin (EMIQ) have anti-obesity effects. Given the absence of in vivo evidence demonstrating their synergistic effects, our study aimed to elucidate the combined obesity prevention potential of HTGT and EMIQ in mice. Mice were treated with these compounds for 8 weeks, while being fed a high-fat diet, to investigate their preventive anti-obesity effects. We demonstrated that the co-treatment of HTGT and EMIQ results in a synergistic anti-obesity effect, as determined by a Kruskal-Wallis test. Furthermore, the combined treatment of HTGT and EMIQ was more effective than orlistat in reducing body weight gain and adipocyte hypertrophy induced by high-fat diet. The co-treatment also significantly reduced total body fat mass and abdominal fat volume. Additionally, the group receiving the co-treatment exhibited increased energy expenditure and higher glucose intolerance. We observed a dose-dependent upregulation of genes associated with mitochondrial oxidative metabolism and PKA signaling, which is linked to lipolysis, in response to the co-treatment. The co-treatment group displayed elevated cAMP levels and AMPK activation in adipose tissue and increased excretion of fecal lipids. The results indicate that the co-treatment of HTGT and EMIQ holds the potential to be a promising combination therapy for combating obesity. To further validate the anti-obesity effect of the combined treatment of HTGT and EMIQ in human subjects, additional clinical studies are warranted.
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Affiliation(s)
- Ye-Jin Moon
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Hee-Seong Kim
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Min-Ji Kim
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Hyeon-Yeong Im
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Yun-Hee Lee
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, Republic of Korea
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3
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Rocha S, Rufino AT, Freitas M, Silva AMS, Carvalho F, Fernandes E. Methodologies for Assessing Pancreatic Lipase Catalytic Activity: A Review. Crit Rev Anal Chem 2023:1-28. [PMID: 37335098 DOI: 10.1080/10408347.2023.2221731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
Abstract
Obesity is a disease of epidemic proportions with a concerning increasing trend. Regarded as one of the main sources of energy, lipids can also represent a big part of an unnecessary intake of calories and be, therefore, directly related to the problem of obesity. Pancreatic lipase is an enzyme that is essential in the absorption and digestion of dietary fats and has been explored as an alternative for the reduction of fat absorption and consequent weigh loss.Literature describes a great variability of methodologies and experimental conditions used in research to evaluate the in vitro inhibitory activity of compounds against pancreatic lipase. However, in an attempt to choose the best approach, it is necessary to know all the reaction conditions and understand how these can affect the enzymatic assay.The objective of this review is to understand and summarize the methodologies and respective experimental conditions that are mainly used to evaluate pancreatic lipase catalytic activity.156 studies were included in this work and a detailed description of the most commonly used UV/Vis spectrophotometric and fluorimetric instrumental techniques are presented, including a discussion regarding the differences found in the parameters used in both techniques, namely enzyme, substrate, buffer solutions, kinetics conditions, temperature and pH.This works shows that both UV/Vis spectrophotometry and fluorimetry are useful instrumental techniques for the evaluation of pancreatic lipase catalytic activity, presenting several advantages and limitations, which make the choice of parameters and experimental conditions a crucial decision to obtain the most reliable results.
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Affiliation(s)
- Sílvia Rocha
- LAQV, REQUIMTE, Laboratory of Applied Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Ana T Rufino
- LAQV, REQUIMTE, Laboratory of Applied Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Marisa Freitas
- LAQV, REQUIMTE, Laboratory of Applied Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Artur M S Silva
- LAQV, REQUIMTE, Department of Chemistry, University of Aveiro, Aveiro, Portugal
| | - Félix Carvalho
- Associate Laboratory i4HB - Institute for Health and Bioeconomy, UCIBIO, REQUIMTE, Laboratory of Toxicology, Department of Biological Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Eduarda Fernandes
- LAQV, REQUIMTE, Laboratory of Applied Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal
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4
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Nakadate K, Kawakami K, Yamazaki N. Anti-Obesity and Anti-Inflammatory Synergistic Effects of Green Tea Catechins and Citrus β-Cryptoxanthin Ingestion in Obese Mice. Int J Mol Sci 2023; 24:ijms24087054. [PMID: 37108217 PMCID: PMC10138730 DOI: 10.3390/ijms24087054] [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: 03/27/2023] [Revised: 04/06/2023] [Accepted: 04/10/2023] [Indexed: 04/29/2023] Open
Abstract
Chronic obesity causes various diseases, leading to an urgent need for its treatment and prevention. Using monosodium-glutamate-induced obesity mice, the present study investigated the synergistic obesity-reducing effects of tea catechins and the antioxidant β-cryptoxanthin present in mandarin oranges. The results show that the obese mice that ingested both tea catechin and β-cryptoxanthin for 4 weeks had a significantly decreased body weight, with no difference in body weight compared with control mice. Moreover, the blood biochemical test results were normal, and the body fat percentage was significantly decreased according to the histopathological analysis. Additionally, the abundance of M1 macrophages, which release pro-inflammatories, was significantly reduced in adipose tissue. Indeed, a significant decrease was detected in M1-macrophage-secreted tumor necrosis factor-alpha levels. Meanwhile, M2 macrophage levels were recovered, and adiponectin, which is released from adipocytes and involved in suppressing metabolic syndrome, was increased. Collectively, these results suggest that the combination of tea catechins and antioxidant foods can alleviate chronic obesity, indicating that a combination of various ingredients in foods might contribute to reducing chronic obesity.
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Affiliation(s)
- Kazuhiko Nakadate
- Department of Basic Science, Educational and Research Center for Pharmacy, Meiji Pharmaceutical University, 2-522-1, Noshio, Kiyose, Tokyo 204-8588, Japan
| | - Kiyoharu Kawakami
- Department of Basic Science, Educational and Research Center for Pharmacy, Meiji Pharmaceutical University, 2-522-1, Noshio, Kiyose, Tokyo 204-8588, Japan
| | - Noriko Yamazaki
- Department of Community Health Care and Sciences, Meiji Pharmaceutical University, 2-522-1, Noshio, Kiyose, Tokyo 204-8588, Japan
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5
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Effects of the Treatment with Flavonoids on Metabolic Syndrome Components in Humans: A Systematic Review Focusing on Mechanisms of Action. Int J Mol Sci 2022; 23:ijms23158344. [PMID: 35955475 PMCID: PMC9369232 DOI: 10.3390/ijms23158344] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 07/24/2022] [Accepted: 07/26/2022] [Indexed: 02/04/2023] Open
Abstract
Diets high in bioactive compounds, such as polyphenols, have been used to mitigate metabolic syndrome (MetS). Polyphenols are a large group of naturally occurring bioactive compounds, classified into two main classes: non-flavonoids and flavonoids. Flavonoids are distributed in foods, such as fruits, vegetables, tea, red wine, and cocoa. Studies have already demonstrated the benefits of flavonoids on the cardiovascular and nervous systems, as well as cancer cells. The present review summarizes the results of clinical studies that evaluated the effects of flavonoids on the components of the MetS and associated complications when offered as supplements over the long term. The results show that flavonoids can significantly modulate several metabolic parameters, such as lipid profile, blood pressure, and blood glucose. Only theaflavin and catechin were unable to affect metabolic parameters. Moreover, only body weight and body mass index were unaltered. Thus, the evidence presented in this systematic review offers bases in support of a flavonoid supplementation, held for at least 3 weeks, as a strategy to improve several metabolic parameters and, consequently, reduce the risk of diseases associated with MetS. This fact becomes stronger due to the rare side effects reported with flavonoids.
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Prabhakar L, Dicky John DG, Singh SR, Murali A. Computational analysis of marine algal compounds for obesity management against pancreatic lipase. J Biomol Struct Dyn 2022:1-10. [PMID: 35575483 DOI: 10.1080/07391102.2022.2074139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Obesity is considered a global crisis because of its increased risk factors triggered by lifestyle changes. The prevalence of this condition is increasing at an alarming rate, giving rise to development of novel drugs. Pancreatic lipase possesses higher efficacy in inhibiting this condition among the other drug targets. In this study, virtual screening of 126 plant-derived anti-obesity compounds and 1110 marine algal compounds from seaweed metabolite database were screened and targeted against pancreatic lipase and ranked based on their binding affinity values. A total of 530 compounds that possessed best docked scores of less than -6 kcal/mol were checked for Lipinski's properties through Swiss ADME. Furthermore, these compounds were subjected to toxicity prediction using PROTOX II server. As much as 38 compounds were found to be non-toxic and were subjected to molecular docking analysis. Based on the binding energy, the following compounds RG012 (-10.15 kcal/mol), LIG42 (-9.7 kcal/mol), BC010 (-8.47 kcal/mol), RL073 (-8.2 kcal/mol), and LIG46 (-8.03 kcal/mol) were selected exhibiting higher binding affinity when compared to the standard drug (Orlistat) and hence these compounds were subjected to molecular dynamics simulation using GROMACS. BC010 complex revealed a stable interaction within the binding pocket and the binding free energy is -158.208 kJ/mol which is higher when compared to other complexes in 100 ns simulation. BC010 ((7S,11S,12S,14R)-4',14-dimethoxyamentol) from brown algae Cystophora fibrosa could be considered as a potential drug candidate to suppress obesity by inhibiting pancreatic lipase.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Lavanya Prabhakar
- Department of Bioinformatics, Sri Ramachandra Institute of Higher Education and Research (DU), Chennai, Tamil Nadu, India
| | - Davis G Dicky John
- Department of Bioinformatics, Sri Ramachandra Institute of Higher Education and Research (DU), Chennai, Tamil Nadu, India
| | | | - Ayaluru Murali
- Department of Bioinformatics, Pondicherry University, Puducherry, India
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7
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Concentrates from tender coconut water and coconut testa beneficially modulates tissue lipid profiles in high-fat fed rats. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2022; 59:1649-1657. [PMID: 35250088 PMCID: PMC8882753 DOI: 10.1007/s13197-021-05178-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 05/29/2021] [Accepted: 06/11/2021] [Indexed: 10/20/2022]
Abstract
The present study involved feeding of tender coconut water concentrate (TCW) and testa phenolic concentrate (PHE) to high fat fed animals. Analysis of serum showed increased HDL-C in concentrates treated group and therefore higher protection against atherogenesis compared to high fat fed group. Lesser fecal fat content and higher level of liver cholesterol were observed in high fat fed group, treatments with TCW and PHE ameliorated significantly. Fat content in the organs (liver, heart, kidney and adipose) of HFD group was high. Furthermore, certain fatty acids observed in the tissues were 14:0, 16:0, 18:0, 18:1, 18:2, 20:0, 20:3 and 20:4, among which 14:0, 16:0 & 18:0 are the major saturated fatty acids that increased significantly in high fat fed group when compared with starch fed group and ameliorated with TCW and PHE dose dependently. These results clearly indicate both the concentrates (TCW and PHE) restrict excess accumulation of lipids and altered composition of fatty acids in tissues as well as serum which are the risk factors for development of insulin resistance, hyperlipidemia, dyslipidemia etc., related to obesity. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s13197-021-05178-2.
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8
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Zhao Z, Ma D. Genome-Wide Identification, Characterization and Function Analysis of Lineage-Specific Genes in the Tea Plant Camellia sinensis. Front Genet 2021; 12:770570. [PMID: 34858483 PMCID: PMC8631334 DOI: 10.3389/fgene.2021.770570] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Accepted: 10/14/2021] [Indexed: 11/22/2022] Open
Abstract
Genes that have no homologous sequences with other species are called lineage-specific genes (LSGs), are common in living organisms, and have an important role in the generation of new functions, adaptive evolution and phenotypic alteration of species. Camellia sinensis var. sinensis (CSS) is one of the most widely distributed cultivars for quality green tea production. The rich catechins in tea have antioxidant, free radical elimination, fat loss and cancer prevention potential. To further understand the evolution and utilize the function of LSGs in tea, we performed a comparative genomics approach to identify Camellia-specific genes (CSGs). Our result reveals that 1701 CSGs were identified specific to CSS, accounting for 3.37% of all protein-coding genes. The majority of CSGs (57.08%) were generated by gene duplication, and the time of duplication occurrence coincide with the time of two genome-wide replication (WGD) events that happened in CSS genome. Gene structure analysis revealed that CSGs have shorter gene lengths, fewer exons, higher GC content and higher isoelectric point. Gene expression analysis showed that CSG had more tissue-specific expression compared to evolutionary conserved genes (ECs). Weighted gene co-expression network analysis (WGCNA) showed that 18 CSGs are mainly associated with catechin synthesis-related pathways, including phenylalanine biosynthesis, biosynthesis of amino acids, pentose phosphate pathway, photosynthesis and carbon metabolism. Besides, we found that the expression of three CSGs (CSS0030246, CSS0002298, and CSS0030939) was significantly down-regulated in response to both types of stresses (salt and drought). Our study first systematically identified LSGs in CSS, and comprehensively analyzed the features and potential functions of CSGs. We also identified key candidate genes, which will provide valuable assistance for further studies on catechin synthesis and provide a molecular basis for the excavation of excellent germplasm resources.
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Affiliation(s)
- Zhizhu Zhao
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, China
| | - Dongna Ma
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen, China
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Xu XY, Zhao CN, Li BY, Tang GY, Shang A, Gan RY, Feng YB, Li HB. Effects and mechanisms of tea on obesity. Crit Rev Food Sci Nutr 2021:1-18. [PMID: 34704503 DOI: 10.1080/10408398.2021.1992748] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Obesity has become a global health concern. It increases the risk of several diseases, such as type 2 diabetes mellitus, nonalcoholic fatty liver disease, and certain cancers, which threatens human health and increases social economic burden. As one of the most consumed beverages, tea contains various phytochemicals with potent bioactive properties and health-promoting effects, such as antioxidant, immune-regulation, cardiovascular protection and anticancer. Tea and its components are also considered as potential candidates for anti-obesity. Epidemiological studies indicate that regular consumption of tea is beneficial for reducing body fat. In addition, the experimental studies demonstrate that the potential anti-obesity mechanisms of tea are mainly involved in increasing energy expenditure and lipid catabolism, decreasing nutrient digestion and absorption as well as lipid synthesis, and regulating adipocytes, neuroendocrine system and gut microbiota. Moreover, most of clinical studies illustrate that the intake of green tea could reduce body weight and alleviate the obesity. In this review, we focus on the effect of tea and its components on obesity from epidemiological, experimental, and clinical studies, and discuss their potential mechanisms.
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Affiliation(s)
- Xiao-Yu Xu
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Nutrition, School of Public Health, Sun Yat-Sen University, Guangzhou, China.,Li Ka Shing Faculty of Medicine, School of Chinese Medicine, The University of Hong Kong, China Hong Kong
| | - Cai-Ning Zhao
- Li Ka Shing Faculty of Medicine, Department of Clinical Oncology, The University of Hong Kong, China Hong Kong
| | - Bang-Yan Li
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Nutrition, School of Public Health, Sun Yat-Sen University, Guangzhou, China
| | - Guo-Yi Tang
- Li Ka Shing Faculty of Medicine, School of Chinese Medicine, The University of Hong Kong, China Hong Kong
| | - Ao Shang
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Nutrition, School of Public Health, Sun Yat-Sen University, Guangzhou, China.,Li Ka Shing Faculty of Medicine, School of Chinese Medicine, The University of Hong Kong, China Hong Kong
| | - Ren-You Gan
- Research Center for Plants and Human Health, Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu, China.,Key Laboratory of Coarse Cereal Processing (Ministry of Agriculture and Rural Affairs), Sichuan Engineering & Technology Research Center of Coarse Cereal Industralization, Chengdu University, Chengdu, China
| | - Yi-Bin Feng
- Li Ka Shing Faculty of Medicine, School of Chinese Medicine, The University of Hong Kong, China Hong Kong
| | - Hua-Bin Li
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Nutrition, School of Public Health, Sun Yat-Sen University, Guangzhou, China
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10
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Acevedo-Fani A, Singh H. Biophysical insights into modulating lipid digestion in food emulsions. Prog Lipid Res 2021; 85:101129. [PMID: 34710489 DOI: 10.1016/j.plipres.2021.101129] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 10/14/2021] [Accepted: 10/21/2021] [Indexed: 10/20/2022]
Abstract
During the last decade, major scientific advances on understanding the mechanisms of lipid digestion and metabolism have been made, with a view to addressing health issues (such as obesity) associated with overconsumption of lipid-rich and sucrose-rich foods. As lipids in common foods exist in the form of emulsions, the structuring of emulsions has been one the main strategies for controlling the rate of lipid digestion and absorption, at least from a colloid science viewpoint. Modulating the kinetics of lipid digestion and absorption offers interesting possibilities for developing foods that can provide control of postprandial lipaemia and control the release of lipophilic compounds. Food emulsions can be designed to achieve considerable differences in the kinetics of lipid digestion but most research has been applied to relatively simple model systems and in in vitro digestion models. Further research to translate this knowledge into more complex food systems and to validate the results in human studies is required. One promising approach to delay/control lipid digestion is to alter the stomach emptying rate of lipids, which is largely affected by interactions of emulsion droplets with the food matrices. Food matrices with different responses to the gastric environment and with different interactions between oil droplets and the food matrix can be designed to influence lipid digestion. This review focuses on key scientific advances made during the last decade on understanding the physicochemical and structural modifications of emulsified lipids, mainly from a biophysical science perspective. The review specifically explores different approaches by which the structure and stability of emulsions may be altered to achieve specific lipid digestion kinetics.
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Affiliation(s)
- Alejandra Acevedo-Fani
- Riddet Institute, Massey University, Private Bag 11222, Palmerston North 4442, New Zealand
| | - Harjinder Singh
- Riddet Institute, Massey University, Private Bag 11222, Palmerston North 4442, New Zealand.
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11
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Gogga P, Szałajda M, Janczy A. Green tea and obesity: Effects of catechins on the
energetic metabolism. POSTEP HIG MED DOSW 2021. [DOI: 10.5604/01.3001.0014.8498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Obesity is a metabolic disease which has now reached epidemic proportions, becoming a major
health, social, and economic problem worldwide. Untreated obesity is associated with decreased
quality of life and is a significant risk factor for the development of other serious health problems,
such as diabetes and cardiovascular diseases. For this reason, new approaches to prevent
excess body mass and to support its reduction if necessary are being examined. Catechins extracted
from green tea – especially epigallocatechin gallate (EGCG) – are one of the most widely
investigated biologically active substances. In addition to the antioxidant, anti-inflammatory,
and anticarcinogenic properties of the catechins, they also exhibit a role in maintaining normal
fat mass and body mass. There are numerous research studies showing that regular green tea
consumption is associated with lower body mass, BMI, and waist circumference. In vitro and
animal experiments confirm beneficial effects of catechins on the energetic metabolism. These
compounds lower lipid and carbohydrates absorption in the intestine. Additionally, they affect
the energetic metabolism, lowering the rate of lipogenesis and adipogenesis, while stimulating
lipolysis and fatty acid oxidation, and increasing energy expenditure. Moreover, it has been established that green tea catechins have an effect on the glucose uptake in the insulin-dependent
manner – by GLUT4. The aim of the following paper was to review and summarize the literature
data concerning the role of green tea catechins in the prevention and treatment of obesity.
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Affiliation(s)
- Patrycja Gogga
- Zakład Biochemii Żywienia, Wydział Nauk o Zdrowiu z Instytutem Medycyny Morskiej i Tropikalnej, Gdański Uniwersytet Medyczny
| | - Monika Szałajda
- Zakład Biochemii Żywienia, Wydział Nauk o Zdrowiu z Instytutem Medycyny Morskiej i Tropikalnej, Gdański Uniwersytet Medyczny
| | - Agata Janczy
- Zakład Biochemii Żywienia, Wydział Nauk o Zdrowiu z Instytutem Medycyny Morskiej i Tropikalnej, Gdański Uniwersytet Medyczny
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12
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Wang L, Huang X, Jing H, Ye X, Jiang C, Shao J, Ma C, Wang H. Separation of epigallocatechin gallate and epicatechin gallate from tea polyphenols by macroporous resin and crystallization. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:832-842. [PMID: 33507177 DOI: 10.1039/d0ay02118k] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Epigallocatechin gallate (EGCG) and epicatechin gallate (ECG) are the most abundant ester catechins of green tea polyphenols (GTPs) with numerous potential bioactivities, which have wide application prospects in the fields of medicine and functional foods. In this study, a new method using macroporous resin and crystallization was established to separate and purify EGCG and ECG. Two resins with high adsorption and desorption capacities for EGCG and ECG were screened through static adsorption/desorption tests, and the LX-20B resin was selected through column chromatography due to its best separation effect. Moreover, the column separation parameters of LX-20B resin (sample amount, ethanol elution concentration, elution volume, and elution flow rate) were optimized. After resin purification, the EGCG and ECG purity were 70.08 ± 2.55% and 74.97 ± 2.66%, respectively, and the recovery rates were 68.07 ± 2.43% and 74.28 ± 2.24%, respectively. After crystallization, the EGCG purity reached 95.87 ± 0.89%, with a total recovery rate of 58.66%, and the ECG purity reached 95.55 ± 1.30%, with a total recovery rate of 62.45%. The separation efficiency of the resin showed no significant change after 6 cycles. These results show the proposed method to be a simple, eco-friendly, and cost-effective separation method for the industrial separation and purification of EGCG and ECG from GTPs.
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Affiliation(s)
- Li Wang
- School of Food Science & Technology, Jiangnan University, Wuxi, Jiangsu, 214122 China.
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13
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Faheem NM, Ali TM. The counteracting effects of (-)-Epigallocatechin-3-Gallate on the immobilization stress-induced adverse reactions in rat pancreas. Cell Stress Chaperones 2021; 26:159-172. [PMID: 33000400 PMCID: PMC7736449 DOI: 10.1007/s12192-020-01165-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 09/07/2020] [Accepted: 09/15/2020] [Indexed: 02/04/2023] Open
Abstract
Many studies suggest that Epigallocatechin-3-Gallate (EGCG) has many protective effects. But little is known about its protective effects against chronic restraint stress-induced damage in rats. The aim was to demonstrate the potential protective effects of EGCG against harmful pancreatic damage to the immobilization stress in the rat model. Forty rats, 2 months old, were divided into four groups (n = 10): control group; EGCG group, rats received EGCG by gavage (100 mg/kg /day) for 30 days; stressed group, rats exposed to immobilization stress; and stressed with EGCG group, rats exposed to immobilization stress and received EGCG for 30 days. Glycemic status parameters, corticosterone, and inflammatory markers were investigated on the first day, 15th day, and the 30th day of the experiment. Pancreatic oxidative stress markers and cytokines were evaluated. Histological, immunohistological, and statistical studies were performed. On the 15th day, fasting blood glucose (FBG), fasting plasma insulin (FPI), homeostatic model assessment for insulin resistance (HOMA-IR), and fasting plasma corticosterone were significantly higher in the stressed group when compared with first and 30th day in the same group as well as when compared with control and stressed with EGCG groups. The stressed group revealed significantly higher pancreatic IL-1β, IL-6, TNF-α, MDA, and NO, serum amylase and serum lipase, and significantly lower GSH, SOD, and CAT when compared to control and stressed with EGCG groups. EGCG treatment attenuated the pancreatic stress-induced cellular degeneration, leucocytic infiltration, and cytoplasmic vacuolations; significantly decreased area percentage of collagen fibers; and significantly increased mean area percentage of insulin immunopositive cell as compared with stressed group. EGCG is a protective agent against immobilization stress because of its anti-diabetic, anti-inflammatory, and and anti-oxidative stress properties, as confirmed by biochemical and histological alterations.
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Affiliation(s)
- Nermeen Mohammed Faheem
- Department of Anatomy, Faculty of Medicine, Ain Shams University, Cairo, Egypt.
- Department of Physical Therapy, Faculty of Applied Medical Sciences, Taif University, Taif, 21944, Kingdom of Saudi Arabia.
| | - Tarek Mohamed Ali
- Department of Medical Physiology, Faculty of Medicine, Taif University, P. O. Box 11099, Taif, 21944, Saudi Arabia
- Department of Medical Physiology, Faculty of Medicine, Beni-Suef University, Beni-Suef, Egypt
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14
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Chatree S, Sitticharoon C, Maikaew P, Pongwattanapakin K, Keadkraichaiwat I, Churintaraphan M, Sripong C, Sririwichitchai R, Tapechum S. Epigallocatechin gallate decreases plasma triglyceride, blood pressure, and serum kisspeptin in obese human subjects. Exp Biol Med (Maywood) 2021; 246:163-176. [PMID: 33045853 PMCID: PMC7871112 DOI: 10.1177/1535370220962708] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Accepted: 09/09/2020] [Indexed: 01/06/2023] Open
Abstract
Obesity is one of major risk factors increasing chronic diseases including type II diabetes, cardiovascular diseases, and hypertension. The effects of epigallocatechin gallate (EGCG), the major active compound in green tea, on reduced obesity and improved metabolic profiles are still controversial. Furthermore, the effects of EGCG on human adipocyte lipolysis and browning of white adipocytes have not been elucidated. This study aimed to investigate the effects of EGCG on obesity, lipolysis, and browning of human white adipocytes. The results showed that, when compared to the baseline values, EGCG significantly decreased fasting plasma triglyceride levels (P < 0.05), systolic blood pressure (P < 0.05), diastolic blood pressure (P < 0.05), and serum kisspeptin levels (P < 0.05) after 8 weeks of supplement. On the other hand, supplement of EGCG in obese human subjects for 4 or 8 weeks did not decrease body weight, body mass index, waist and hip circumferences, nor total body fat mass or percentage when compared to their baseline values. The study in human adipocytes showed that EGCG did not increase the glycerol release when compared to vehicle, suggesting that it had no lipolytic effect. Furthermore, treatment of EGCG did not enhance uncoupling protein 1 (UCP1) mRNA expression in human white adipocytes when compared with treatment of pioglitazone, the peroxisome proliferator-activated receptor γ (PPAR-γ) agonist, suggesting that EGCG did not augment the browning effect of PPAR-γ on white adipocytes. This study revealed that EGCG reduced 2 metabolic risk factors which are triglyceride and blood pressure in the human experiment. We also showed a novel evidence that EGCG decreased kisspeptin levels. However, EGCG had no effects on obesity reduction in humans, lipolysis, nor browning of human white adipocytes.
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Affiliation(s)
- Saimai Chatree
- Department of Physiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
| | - Chantacha Sitticharoon
- Department of Physiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
| | - Pailin Maikaew
- Department of Physiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
| | - Kitchaya Pongwattanapakin
- Department of Physiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
| | - Issarawan Keadkraichaiwat
- Department of Physiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
| | - Malika Churintaraphan
- Department of Physiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
| | - Chanakarn Sripong
- Department of Physiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
| | - Rungnapa Sririwichitchai
- Department of Physiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
| | - Sompol Tapechum
- Department of Physiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
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15
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Yoo SH, Lee YE, Chung JO, Rha CS, Hong YD, Park MY, Shim SM. Enhancing the effect of catechins with green tea flavonol and polysaccharides on preventing lipid absorption and accumulation. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2020.110032] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Katanasaka Y, Miyazaki Y, Sunagawa Y, Funamoto M, Shimizu K, Shimizu S, Sari N, Shimizu Y, Wada H, Hasegawa K, Morimoto T. Kosen-cha, a Polymerized Catechin-Rich Green Tea, as a Potential Functional Beverage for the Reduction of Body Weight and Cardiovascular Risk Factors: A Pilot Study in Obese Patients. Biol Pharm Bull 2020; 43:675-681. [PMID: 32238708 DOI: 10.1248/bpb.b19-00921] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Previous studies have shown that green tea catechins (GTCs) have beneficial effects on obesity and metabolic syndromes. In this study, we prepared kosen-cha from green tea using high pressure extraction, to reduce the astringent taste of the green tea. We identified a large quantity of polymerized GTCs in kosen-cha. To investigate the effects of kosen-cha containing polymerized GTCs in obese Japanese patients, we designed an open-label pilot study in which 6 obese subjects (body mass index (BMI) >25 kg/m2) were administered kosen-cha (5 g/L/d) for 12 weeks. Body composition, serum lipids, insulin resistance, vascular functions, and cardiac hypertrophy were measured before and 12 weeks after kosen-cha administration. Kosen-cha showed no significant adverse effects on the patients. Body weights, BMI, waist circumferences, serum triglyceride (TG) levels, and homeostasis model assessment as an index of insulin resistance (HOMA-IR) levels were significantly decreased after the 12 weeks of administration. Flow-mediated dilation (FMD) (p = 0.0214), brachial-ankle pulse wave velocity (baPWV)(p = 0.0141), left ventricular mass indexes (p = 0.0120), and plasma brain natriuretic peptide (BNP) (p = 0.0144) were significantly improved. Overall, kosen-cha reduced obesity and improved insulin resistance, vascular function, and cardiac hypertrophy, indicating its preventive potential in obesity and metabolic syndrome.
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Affiliation(s)
- Yasufumi Katanasaka
- Division of Molecular Medicine, School of Pharmaceutical Sciences, University of Shizuoka.,Shizuoka General Hospital.,Division of Translational Research, National Hospital Organization Kyoto Medical Center
| | - Yusuke Miyazaki
- Division of Molecular Medicine, School of Pharmaceutical Sciences, University of Shizuoka.,Shizuoka General Hospital.,Division of Translational Research, National Hospital Organization Kyoto Medical Center
| | - Yoichi Sunagawa
- Division of Molecular Medicine, School of Pharmaceutical Sciences, University of Shizuoka.,Shizuoka General Hospital.,Division of Translational Research, National Hospital Organization Kyoto Medical Center
| | - Masafumi Funamoto
- Division of Molecular Medicine, School of Pharmaceutical Sciences, University of Shizuoka
| | - Kana Shimizu
- Division of Molecular Medicine, School of Pharmaceutical Sciences, University of Shizuoka
| | - Satoshi Shimizu
- Division of Molecular Medicine, School of Pharmaceutical Sciences, University of Shizuoka
| | - Nurmila Sari
- Division of Molecular Medicine, School of Pharmaceutical Sciences, University of Shizuoka
| | | | - Hiromichi Wada
- Division of Translational Research, National Hospital Organization Kyoto Medical Center
| | - Koji Hasegawa
- Division of Molecular Medicine, School of Pharmaceutical Sciences, University of Shizuoka.,Division of Translational Research, National Hospital Organization Kyoto Medical Center
| | - Tatsuya Morimoto
- Division of Molecular Medicine, School of Pharmaceutical Sciences, University of Shizuoka.,Shizuoka General Hospital.,Division of Translational Research, National Hospital Organization Kyoto Medical Center
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17
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Gorai T, Sakthivel S, Maitra U. An Inexpensive Paper-Based Photoluminescent Sensor for Gallate Derived Green Tea Polyphenols. Chem Asian J 2020; 15:4023-4027. [PMID: 33078577 DOI: 10.1002/asia.202001054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 10/16/2020] [Indexed: 11/10/2022]
Abstract
This work describes a terbium luminescence-based protocol to selectively detect gallate-derived green tea polyphenols on a supramolecular gel immobilised paper platform for the first time. This user-friendly, inexpensive (€ 0.0015) approach requires very low sample volumes for the analysis. The developed strategy enables simultaneous detection of gallate polyphenols in multiple tea samples with the potential for practical applications.
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Affiliation(s)
- Tumpa Gorai
- Current address: School of Chemistry Trinity Biomedical Sciences Institute (TBSI), Trinity College Dublin, 152-160 Pearse Street, Dublin, 2, Ireland
| | - Shruthi Sakthivel
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560012, India
| | - Uday Maitra
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560012, India
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18
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Ochiai M. Evaluating the appropriate oral lipid tolerance test model for investigating plasma triglyceride elevation in mice. PLoS One 2020; 15:e0235875. [PMID: 33022003 PMCID: PMC7537863 DOI: 10.1371/journal.pone.0235875] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 09/22/2020] [Indexed: 12/13/2022] Open
Abstract
The oral lipid tolerance test (OLTT) has been known to assess intestinal fat metabolism and whole-body lipid metabolism, but rodent models for OLTT are not yet established. Differences in OLTT methodology preclude the generation of definitive results, which may cause some confusion about the anti-hypertriglyceridemia effects of the test materials. To standardize and generate more appropriate methodology for the OLTT, we examined the effects of mice strain, dietary lipid sources, fasting period, and gender on lipid-induced hypertriglyceridemia in mice. First, lipid-induced hypertriglyceridemia was more strongly observed in male ddY mice than in C57BL/6N or ICR mice. Second, the administration of olive and soybean oils remarkably represented lipid-induced hypertriglyceridemia. Third, fasting period before the OLTT largely affected the plasma triglyceride elevation. Fasting for 12 h, but less than 48 h, provoked lipid-induced hypertriglyceridemia. Fourth, we explored the suppressive effects of epigallocatechin gallate (EGCG), a green tea polyphenol, on lipid-induced hypertriglyceridemia. The administration of 100 mg/kg of EGCG suppressed lipid-induced hypertriglyceridemia and intestinal lipase activity. Fifth, EGCG-induced suppressive effects were observed after lipid-induced hypertriglyceridemia was observed in male mice, but not in female mice. Lastly, lipid-induced hypertriglyceridemia could be more effectively induced in mice fed a high-fat diet for 1 week before the OLTT. These findings indicate that male ddY mice after 12 h fasting displayed marked lipid-induced hypertriglyceridemia in response to soybean oil. Hence, the defined experiment condition may be a more appropriate OLTT model for evaluating lipid-induced hypertriglyceridemia.
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Affiliation(s)
- Masaru Ochiai
- Department of Animal Science, School of Veterinary Medicine, Kitasato University, Towada, Aomori, Japan
- * E-mail:
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19
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Effects of Catechin on Activity of Angiotensin-Converting Enzyme and Generation of Reactive Oxygen Species in Rat Aorta. Bull Exp Biol Med 2020; 168:627-630. [DOI: 10.1007/s10517-020-04766-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Indexed: 01/31/2023]
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20
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Shiha G, Soliman R, Elbasiony M, Darwish NHE, Mousa SA. Addition of Epigallocatechin Gallate 400 mg to Sofosbuvir 400 mg + Daclatisvir 60 mg With or Without Ribavirin in Treatment of Patients with Chronic Hepatitis C Improves the Safety Profile: A Pilot Study. Sci Rep 2019; 9:13593. [PMID: 31537880 PMCID: PMC6753069 DOI: 10.1038/s41598-019-49973-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 08/30/2019] [Indexed: 02/07/2023] Open
Abstract
Emergence of new molecules acting directly on the hepatitic C virus (HCV) has improved treatment outcomes. However, there is a risk of selecting viral escape mutants, so a new combination is needed using different inhibitors that target different steps of the HCV infectious cycle. Novel single tablet formulations were developed: Dactavira, composed of sofosbuvir (SOF) 400 mg/daclatisvir (DCV) 60 mg/epigallocatechin gallate (EGCG) 400 mg without ribavirin (RBV); and Dactavira plus, which includes RBV 800 mg. A randomized, open-label study was carried out on treatment-naïve non-cirrhotic (Group A, n = 50) and treatment-naïve cirrhotic (Group B, n = 22) patients with genotype 4 HCV infection. Group A was randomly assigned to receive a single daily fixed-dose (Dactavira, n = 25) or the standard of care [SOF 400 mg/DCV 60 mg] (n = 25) daily for 12 weeks. Group B was randomly assigned to receive a single daily fixed-dose (Dactavira plus, n = 11) or the standard of care + RBV 800 mg (n = 11) daily for 12 weeks. Patients receiving Dactavira or Dactavira plus had a significantly more rapid rate of viral load decline as compared to patients receiving the standard of care therapy. Sustained virological response for 12 weeks for Dactavira or Dactavira plus showed no statistically significant difference when compared to the standard of care. Also, they did not affect normal hemoglobin levels (p < 0.001) versus the standard of care. The incorporated EGCG interferes with the viral entry mechanisms, as reported by several investigators, and in turn enhances efficacy and prevents relapse as compared to the standard of care. Also, its antihemeolytic and antifibrotic activities may improve the safety and tolerability of the therapy.
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Affiliation(s)
- Gamal Shiha
- Internal Medicine Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt.,Egyptian Liver Research Institute and Hospital (ELRIAH), Mansoura, Egypt
| | - Reham Soliman
- Egyptian Liver Research Institute and Hospital (ELRIAH), Mansoura, Egypt.,Tropical Medicine Department, Faculty of Medicine, Port Said University, Port Said, Egypt
| | - Mohamed Elbasiony
- Internal Medicine Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt.,Egyptian Liver Research Institute and Hospital (ELRIAH), Mansoura, Egypt
| | - Noureldien H E Darwish
- Clinical Pathology Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt.,The Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Rensselaer, NY, USA
| | - Shaker A Mousa
- The Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Rensselaer, NY, USA. .,Virothera Pharmaceuticals, Rensselaer, NY, USA.
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21
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Zhou J, Zhang L, Meng Q, Wang Y, Long P, Ho CT, Cui C, Cao L, Li D, Wan X. Roasting improves the hypoglycemic effects of a large-leaf yellow tea infusion by enhancing the levels of epimerized catechins that inhibit α-glucosidase. Food Funct 2019; 9:5162-5168. [PMID: 30246823 DOI: 10.1039/c8fo01429a] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Teas contain bioactive polyphenols, such as (-)-epigallocatechin gallate (EGCG), which is not stable during the processing of tea. EGCG can be epimerized into (-)-gallocatechin gallate (GCG), which is present in very small amounts in fresh tea leaves. An infusion made from roasted large-leaf yellow tea inhibited α-glucosidase more significantly than an infusion of unroasted yellow tea, with IC50 values of 76.08 ± 8.96 and 170.17 ± 33.00 μg mL-1, respectively. After roasting, the content of GCG showed about a 5-fold increase, while EGCG showed a decrease of 56.6%. Of the two main α-glucosidase inhibitors, GCG exhibited a higher inhibitory effect on α-glucosidase than its corresponding epimer (EGCG), whose IC50 value was about 3-fold lower. Modeling of molecular docking suggested that GCG preferably binds to the target α-glucosidase protein; this was confirmed by in vitro protein-polyphenol binding, where GCG had a binding rate about 4 times higher than that of EGCG. Comparative in vivo studies using oral starch tolerance tests in mice verified that GCG exhibited lower postprandial blood glucose compared to EGCG. These results suggest that roasting is a simple and effective way to increase the capacity of large-leaf yellow tea to regulate postprandial blood glucose.
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Affiliation(s)
- Jie Zhou
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, 130 West Changjiang Road, Hefei 230036, China.
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22
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Hashidume T, Sasaki K, Hirata J, Kato M, Yoshikawa Y, Iwasaki Y, Arai H, Miura S, Miyoshi N. Effects of Sanyaku and Its Constituent Diosgenin on the Fasted and Postprandial Hypertriacylglycerolemia in High-Fat-Diet-Fed KK- A y Mice. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:9968-9975. [PMID: 30179466 DOI: 10.1021/acs.jafc.8b03040] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In this study, we examined the fasted and postprandial triacylglycerol (TG) levels in KK- A y mice fed a high-fat diet (HFD) or a HFD containing either 500 ppm (0.05%) of diosgenin or 500 ppm (0.05%) of diosgenin-containing Chinese yam sanyaku. Oral fat tolerance tests revealed that, not only in the fasting state but also after loading of lipid emulsion, plasma levels of TG were significantly reduced in sanyaku- and diosgenin- fed mice. Levels of fat oxidation, especially in the dark phase (from 7 p.m. to 7 a.m.), were increased in the sanyaku and diosgenin groups. Moreover mRNA levels of lipoprotein lipase and peroxisome proliferator-activated receptor γ, coactivator 1α were moderately upregulated in the liver of sanyaku- and diosgenin-ingested mice. These results suggest that consecutive ingestion of diosgenin or diosgenin-containing sanyaku at the dose achievable in a human diet potentially ameliorates fasted and postprandial hypertriacylglycerolemia, which could be associated with the improvement of TG metabolism.
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Affiliation(s)
| | | | | | | | - Yuko Yoshikawa
- School of Veterinary Medicine, Faculty of Veterinary Science , Nippon Veterinary and Life Science University , Tokyo 180-0023 , Japan
| | - Yusaku Iwasaki
- Laboratory of Animal Science, Graduate School of Life and Environmental Sciences , Kyoto Prefectural University , 1-5 Hangi-cho , Shimogamo, Sakyo-ku, Kyoto 606-8522 , Japan
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23
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Zhang D, Du M, Wei Y, Wang C, Shen L. A review on the structure-activity relationship of dietary flavonoids for protecting vascular endothelial function: Current understanding and future issues. J Food Biochem 2018. [DOI: 10.1111/jfbc.12557] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Di Zhang
- School of Food and Biological Engineering; Jiangsu University; Zhenjiang China
| | - Mingzhao Du
- Department of Cardiology; Affiliated Hospital of Jiangsu University, Jiangsu University; Zhenjiang China
| | - Ying Wei
- Chinese National Research Institute of Food & Fermentation Industries; Beijing China
| | - Chengtao Wang
- Beijing Engineering and Technology Research Center of Food Additives; Beijing Technology & Business University (BTBU); Beijing China
| | - Lingqin Shen
- School of Chemistry and Chemical Engineering; Jiangsu University; Zhenjiang China
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24
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Takagaki R, Ishida Y, Sadakiyo T, Taniguchi Y, Sakurai T, Mitsuzumi H, Watanabe H, Fukuda S, Ushio S. Effects of isomaltodextrin in postprandial lipid kinetics: Rat study and human randomized crossover study. PLoS One 2018; 13:e0196802. [PMID: 29715296 PMCID: PMC5929559 DOI: 10.1371/journal.pone.0196802] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Accepted: 04/19/2018] [Indexed: 11/19/2022] Open
Abstract
Isomaltodextrin (IMD) is a novel dietary fiber-like polysaccharide: a type of α-glucan produced from starch using enzymes derived from microorganisms. The results of cohort studies show that dietary fiber can prevent cardiovascular disorders caused by lifestyle-related diseases such as metabolic syndrome. Inhibition of excess fat absorption by dietary fiber is known to be one of the mechanisms, and it is also known that the actions of dietary fiber vary depending on factors such as its structure or origin. Thus, we investigated the inhibitory actions of IMD on fat absorption, and analyzed its mechanism of action. In rats, the absorption of fat given by gavage was significantly lower at 1, 2, and 6 hours after IMD administration than after vehicle administration. In humans, IMD was associated with a lesser increase in blood triglycerides in subjects whose blood triglycerides were otherwise apt to rise. We also found by in vitro emulsion studies that IMD, which had no effect on digestive enzyme activity or emulsion formation, stabilized the micro size micelle by inducing enlarged micelle particle size and increased zeta potential. In conclusion, the mechanism of inhibition of fat absorption by IMD may be a delay in micelle particles accessing the intestinal epithelium through changes in the surface structure and the physical properties of the micelle particles.
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Affiliation(s)
| | - Yuki Ishida
- R&D Center, Hayashibara Co., Ltd., Okayama, Japan
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25
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Phongnarisorn B, Orfila C, Holmes M, Marshall LJ. Enrichment of Biscuits with Matcha Green Tea Powder: Its Impact on Consumer Acceptability and Acute Metabolic Response. Foods 2018; 7:foods7020017. [PMID: 29389844 PMCID: PMC5848121 DOI: 10.3390/foods7020017] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 01/22/2018] [Accepted: 01/26/2018] [Indexed: 01/03/2023] Open
Abstract
Matcha green tea powder (MGTP) is made with finely ground green tea leaves that are rich in phytochemicals, most particularly catechins. Shortbread biscuits were enriched with MGTP and evaluated for consumer acceptability and potential functional health properties. Baking decreased the content of total catechins by 19% compared to dough, although epimerization increased the amount of (+)-gallocatechin gallate at the expense of other catechins such as (−)-epigallocatechin gallate. Consumer acceptability tests using a 9-point hedonic scale showed that consumers preferred enriched biscuits with low content of MGTP (2 g of MGTP 100 g−1 of flour), and an increase of sugar content did not significantly improve the acceptability of MGTP-enriched biscuits. Overall, enrichment of biscuits with MGTP did not significantly affect the postprandial glucose or triglyceride response (area under curve) compared to non-enriched biscuits consumed with water or MGTP drink. Enriching biscuits with Matcha green tea is acceptable to consumers, but may not bring significant postprandial effects.
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Affiliation(s)
- Benjapor Phongnarisorn
- School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, UK.
- Faculty of Agricultural Technology, Phuket Rajabhat University, Phuket 83000, Thailand.
| | - Caroline Orfila
- School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, UK.
| | - Melvin Holmes
- School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, UK.
| | - Lisa J Marshall
- School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, UK.
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26
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Nagaoka S. Nutrition and Food Science Studies of Cholesterol Metabolism Regulation. ACTA ACUST UNITED AC 2018. [DOI: 10.4327/jsnfs.71.11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Satoshi Nagaoka
- Department of Applied Life Science, Faculty of Applied Biological Sciences, Gifu University
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27
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Singh RK, Mishra S, Jena S, Panigrahi B, Das B, Jayabalan R, Parhi PK, Mandal D. Rapid colorimetric sensing of gadolinium by EGCG-derived AgNPs: the development of a nanohybrid bioimaging probe. Chem Commun (Camb) 2018; 54:3981-3984. [DOI: 10.1039/c8cc01777h] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Polyphenol functionalized AgNPs are demonstrated as colorimetric sensors for the selective detection of gadolinium and the generated nanohybrids exhibit bioimaging potential.
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Affiliation(s)
| | - Sourav Mishra
- School of Biotechnology
- KIIT Deemed to be University
- Bhubaneswar
- India
| | - Satyapriya Jena
- School of Biotechnology
- KIIT Deemed to be University
- Bhubaneswar
- India
| | | | | | | | - Pankaj Kumar Parhi
- School of Biotechnology
- KIIT Deemed to be University
- Bhubaneswar
- India
- School of Chemical Technology
| | - Dindyal Mandal
- School of Biotechnology
- KIIT Deemed to be University
- Bhubaneswar
- India
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28
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Dietary egg-white protein increases body protein mass and reduces body fat mass through an acceleration of hepaticβ-oxidation in rats. Br J Nutr 2017; 118:423-430. [DOI: 10.1017/s0007114517002306] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
AbstractEgg-white protein (EWP) is known to reduce lymphatic TAG transport in rats. In this study, we investigated the effects of dietary EWP on body fat mass. Male rats, 4 weeks old, were fed diets containing either 20 % EWP or casein for 28 d. Carcass protein levels and gastrocnemius leg muscle weights in the EWP group were significantly higher than those in the casein group. In addition, carcass TAG levels and abdominal fat weights in the EWP group were significantly lower than those in the casein group; adipocyte size in abdominal fat in the EWP group was smaller than that in the casein group. To identify the involvement of dietary fat levels in the rats, one of two fat levels (5 or 10 %) was added to their diet along with the different protein sources (EWP and casein). Abdominal fat weight and serum and hepatic TAG levels were significantly lower in the EWP group than in the casein group. Moreover, significantly higher values of enzymatic activity related toβ-oxidation in the liver were observed in the EWP group compared with the casein group. Finally, abdominal fat weight reduction in the EWP group with the 10 % fat diet was lower than that in the EWP group with the 5 % fat diet. In conclusion, our results indicate that, in addition to the inhibition of dietary TAG absorption reported previously, dietary EWP reduces body fat mass in rats through an increase of body protein mass and the acceleration ofβ-oxidation in the liver.
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Green Tea Extracts Epigallocatechin-3-gallate for Different Treatments. BIOMED RESEARCH INTERNATIONAL 2017; 2017:5615647. [PMID: 28884125 PMCID: PMC5572593 DOI: 10.1155/2017/5615647] [Citation(s) in RCA: 154] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 06/28/2017] [Indexed: 02/05/2023]
Abstract
Epigallocatechin-3-gallate (EGCG), a component extracted from green tea, has been proved to have multiple effects on human pathological and physiological processes, and its mechanisms are discrepant in cancer, vascularity, bone regeneration, and nervous system. Although there are multiple benefits associated with EGCG, more and more challenges are still needed to get through. For example, EGCG shows low bioactivity via oral administration. This review focuses on effects of EGCG, including anti-cancer, antioxidant, anti-inflammatory, anticollagenase, and antifibrosis effects, to express the potential of EGCG and necessity of further studies in this field.
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Effect of Ocimum sanctum and Crataegus pubescens aqueous extracts on obesity, inflammation, and glucose metabolism. J Funct Foods 2017. [DOI: 10.1016/j.jff.2017.05.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
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Galloylation of polyphenols alters their biological activity. Food Chem Toxicol 2017; 105:223-240. [DOI: 10.1016/j.fct.2017.04.021] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 03/23/2017] [Accepted: 04/15/2017] [Indexed: 01/08/2023]
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Peluso I, Serafini M. Antioxidants from black and green tea: from dietary modulation of oxidative stress to pharmacological mechanisms. Br J Pharmacol 2017; 174:1195-1208. [PMID: 27747873 PMCID: PMC5429329 DOI: 10.1111/bph.13649] [Citation(s) in RCA: 130] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Revised: 09/12/2016] [Accepted: 09/29/2016] [Indexed: 12/15/2022] Open
Abstract
The consumption of tea (Camellia sinensis) has been correlated with a low incidence of chronic pathologies, such as cardiovascular disease and cancer, in which oxidative stress plays a critical role. Tea catechins and theaflavins are, respectively, the bioactive phytochemicals responsible for the antioxidant activity of green tea (GT) and black tea (BT). In addition to their redox properties, tea catechins and theaflavins could have also pharmacological activities, such as the ability to lower glucose, lipid and uric acid (UA) levels. These activities are mediated by pharmacological mechanisms such as enzymatic inhibition and interaction with transporters. Epigallocatechin gallate is the most active compound at inhibiting the enzymes involved in cholesterol and UA metabolism (hydroxy-3-methyl-glutaryl-CoA reductase and xanthine oxidase respectively) and affecting glucose transporters. The structural features of catechins that significantly contribute to their pharmacological effect are the presence/absence of the galloyl moiety and the number and positions of the hydroxyl groups on the rings. Although the inhibitory effects on α-glucosidase, maltase, amylase and lipase, multidrug resistance 1, organic anion transporters and proton-coupled folate transport occur at higher concentrations than those apparent in the circulation, these effects could be relevant in the gut. In conclusion, despite the urgent need for further research in humans, the regular consumption of moderate quantities of GT and BT can effectively modulate their antioxidant capacity, mainly in people subjected to oxidative stress, and could improve the metabolism of glucose, lipid and UA. LINKED ARTICLES This article is part of a themed section on Principles of Pharmacological Research of Nutraceuticals. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v174.11/issuetoc.
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Affiliation(s)
- Ilaria Peluso
- Functional Foods and Metabolic Stress Prevention Laboratory, Centre for Food and NutritionCouncil for Agricultural Research and EconomicsRomeItaly
| | - Mauro Serafini
- Functional Foods and Metabolic Stress Prevention Laboratory, Centre for Food and NutritionCouncil for Agricultural Research and EconomicsRomeItaly
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Landeka I, Jurčević, Dora M, Guberović I, Petras M, Rimac S, Brnčić, Đikić D. Polyphenols from Wine Lees as a Novel Functional Bioactive Compound in the Protection Against Oxidative Stress and Hyperlipidaemia. Food Technol Biotechnol 2017; 55:109-116. [PMID: 28559739 PMCID: PMC5434373 DOI: 10.17113/ftb.55.01.17.4894] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 10/13/2016] [Indexed: 11/12/2022] Open
Abstract
The study examines the potential of wine industry by-product, the lees, as a rich mixture of natural polyphenols, and its physiological potential to reduce postprandial metabolic and oxidative stress caused by a cholesterol-rich diet in in vivo model. Chemical analysis of wine lees showed that their total solid content was 94.2%. Wine lees contained total phenols, total nonflavonoids and total flavonoids expressed in mg of gallic acid equivalents per 100 g of dry mass: 2316.6±37.9, 1332.5±51.1 and 984.1±28.2, respectively. The content of total anthocyanins expressed in mg of cyanidin-3-glucoside equivalents per 100 g of dry mass was 383.1±21.6. Antioxidant capacity of wine lees determined by the DPPH and FRAP methods and expressed in mM of Trolox equivalents per 100 g was 259.8±1.8 and 45.7±1.05, respectively. The experiment lasted 60 days using C57BL/6 mice divided in four groups: group 1 was fed normal diet and used as control, group 2 was fed normal diet with added wine lees, group 3 was fed high-cholesterol diet (HCD), i.e. normal diet with the addition of sunflower oil, and group 4 was fed HCD with wine lees. HCD increased serum total cholesterol (TC) by 2.3-fold, triacylglycerol (TAG) by 1.5-fold, low-density lipoprotein (LDL) by 3.5-fold and liver malondialdehyde (MDA) by 50%, and reduced liver superoxide dismutase (SOD) by 50%, catalase (CAT) by 30% and glutathione (GSH) by 17.5% compared to control. Conversely, treatment with HCD and wine lees reduced TC and LDL up to 1.4 times more than with HCD only, with depletion of lipid peroxidation (MDA) and restoration of SOD and CAT activities in liver, approximating values of the control. HDL levels were unaffected in any group. Serum transaminase activity showed no hepatotoxic properties in the treatment with lees alone. In the proposed model, wine lees as a rich polyphenol source could be a basis for functional food products without alcohol.
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Affiliation(s)
- Irena Landeka
- University of Zagreb, Faculty of Food Technology and Biotechnology, Pierottijeva 6,
HR-10000 Zagreb, Croatia
- Faculty of Science, University of Zagreb, Rooseveltov trg 6, HR-10000 Zagreb, Croatia
| | - Jurčević
- University of Zagreb, Faculty of Food Technology and Biotechnology, Pierottijeva 6,
HR-10000 Zagreb, Croatia
| | - Mirna Dora
- University of Zagreb, Faculty of Food Technology and Biotechnology, Pierottijeva 6,
HR-10000 Zagreb, Croatia
| | - Iva Guberović
- University of Zagreb, Faculty of Food Technology and Biotechnology, Pierottijeva 6,
HR-10000 Zagreb, Croatia
| | - Marija Petras
- University of Zagreb, Faculty of Food Technology and Biotechnology, Pierottijeva 6,
HR-10000 Zagreb, Croatia
| | - Suzana Rimac
- University of Zagreb, Faculty of Food Technology and Biotechnology, Pierottijeva 6,
HR-10000 Zagreb, Croatia
- Faculty of Science, University of Zagreb, Rooseveltov trg 6, HR-10000 Zagreb, Croatia
| | - Brnčić
- University of Zagreb, Faculty of Food Technology and Biotechnology, Pierottijeva 6,
HR-10000 Zagreb, Croatia
| | - Domagoj Đikić
- Faculty of Science, University of Zagreb, Rooseveltov trg 6, HR-10000 Zagreb, Croatia
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Beneficial Effects of Tea and the Green Tea Catechin Epigallocatechin-3-gallate on Obesity. Molecules 2016; 21:molecules21101305. [PMID: 27689985 PMCID: PMC6274011 DOI: 10.3390/molecules21101305] [Citation(s) in RCA: 125] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 09/22/2016] [Accepted: 09/24/2016] [Indexed: 12/17/2022] Open
Abstract
Green tea has been shown to have beneficial effects against cancer, obesity, atherosclerosis, diabetes, bacterial and viral infections, and dental caries. The catechin (−)-epigallocatechin-3-gallate (EGCG) has shown the highest biological activity among green tea catechins (GTCs) in most of the studies. While several epidemiological studies have shown the beneficial effects of tea and GTCs on obesity, some studies have failed to do this. In addition, a large number of interventional clinical studies have shown these favorable effects, and cellular and animal experiments have supported those findings, and revealed the underlying anti-obesity mechanisms. One of the mechanisms is enhanced cellular production of reactive oxygen species, which is mediated through the pro-oxidant action of EGCG, leading to the activation of adenosine monophosphate-activated protein kinase, which suppresses gene and protein expression of enzymes and transcription factors involved in adipogenesis and lipogenesis, and stimulates those involved in lipolysis. Recently, scientific evidence supporting the beneficial anti-obesity effects of green tea and GTCs has been increasing. However, future investigations are still required to clarify the reasons for the inconsistent results reported in the human studies; to achieve this, careful adjustment of confounding factors will be required.
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Imbe H, Sano H, Miyawaki M, Fujisawa R, Miyasato M, Nakatsuji F, Haseda F, Tanimoto K, Terasaki J, Maeda-Yamamoto M, Tachibana H, Hanafusa T. “Benifuuki” green tea, containing O -methylated EGCG, reduces serum low-density lipoprotein cholesterol and lectin-like oxidized low-density lipoprotein receptor-1 ligands containing apolipoprotein B: A double-blind, placebo-controlled randomized trial. J Funct Foods 2016. [DOI: 10.1016/j.jff.2016.05.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Kobayashi M, Kawano T, Ukawa Y, Sagesaka YM, Fukuhara I. Green tea beverages enriched with catechins with a galloyl moiety reduce body fat in moderately obese adults: a randomized double-blind placebo-controlled trial. Food Funct 2016; 7:498-507. [DOI: 10.1039/c5fo00750j] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
We investigated the effects of ingesting a green tea beverage enriched with catechins with a galloyl moiety during a meal on body fat reduction in moderately obese adults.
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Abstract
Obesity and being overweight are linked with a cluster of metabolic and vascular disorders that have been termed the metabolic syndrome. This syndrome promotes the incidence of cardiovascular diseases that are an important public health problem because they represent a major cause of death worldwide. Whereas there is not a universally-accepted set of diagnostic criteria, most expert groups agree that this syndrome is defined by an endothelial dysfunction, an impaired insulin sensitivity and hyperglycemia, dyslipidemia, abdominal obesity and hypertension. Epidemiological studies suggest that the beneficial cardiovascular health effects of diets rich in green tea are, in part, mediated by their flavonoid content, with particular benefits provided by members of this family such as epigallocatechin gallate (EGCG). Although their bioavailability is discussed, various studies suggest that EGCG modulates cellular and molecular mechanisms of various symptoms leading to metabolic syndrome. Therefore, according to in vitro and in vivo model data, this review attempts to increase our understanding about the beneficial properties of EGCG to prevent metabolic syndrome.
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Anti-atherosclerotic activity of catechins depends on their stereoisomerism. Atherosclerosis 2015; 240:125-30. [DOI: 10.1016/j.atherosclerosis.2015.02.026] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 02/11/2015] [Accepted: 02/14/2015] [Indexed: 01/26/2023]
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Unno T, Sakuma M, Mitsuhashi S. Effect of dietary supplementation of (-)-epigallocatechin gallate on gut microbiota and biomarkers of colonic fermentation in rats. J Nutr Sci Vitaminol (Tokyo) 2015; 60:213-9. [PMID: 25078378 DOI: 10.3177/jnsv.60.213] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Alterations in gut microbiota composition offer insights that may be relevant for several chronic conditions, including obesity. This study aimed to evaluate the effect of (-)-epigallocatechin gallate (EGCG) on the modulation of gut microbiota and biomarkers of colonic fermentation end-products in rats. Rats were fed an assigned diet of either a control diet, a 0.3% (w/w) EGCG diet, or a 0.6% (w/w) EGCG diet for 4 wk. Compared to the control group, the addition of 0.6% EGCG to the diet brought about a significant increase in the starch and protein contents in the feces collected in the fourth week of feeding, but the relative weights of abdominal adipose tissues of rats were inversely suppressed. Host-specific bacterial community composition, as determined by terminal restriction fragment length polymorphism (T-RFLP) patterns for fecal 16S ribosomal RNA, showed a significant response in the reduced occupation of Clostridium spp. and an increased trend of Bacteroides by dietary supplementation with EGCG. The 0.6% EGCG diet also influenced the status of Bifidobacterium and Prevotella to a lesser extent. Interestingly, the cecum of rats fed the 0.6% EGCG diet contained lower levels of acetic and butyric acids, whereas EGCG had little influence on the cecal level of propionic acid. EGCG also reduced the cecal p-cresol concentration in a dose-dependent fashion. In conclusion, dietary EGCG affects the growth of certain species of gut microbiota in rats and is associated with the cecal pattern of short chain fatty acids which could be responsible for regulating energy metabolism in the body.
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Affiliation(s)
- Tomonori Unno
- Department of Health and Nutrition, Tokyo Kasei Gakuin University
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Giordani MA, Collicchio TCM, Ascêncio SD, Martins DTDO, Balogun SO, Bieski IGC, da Silva LA, Colodel EM, de Souza RL, de Souza DLP, de França SA, Andrade CMB, Kawashita NH. Hydroethanolic extract of the inner stem bark of Cedrela odorata has low toxicity and reduces hyperglycemia induced by an overload of sucrose and glucose. JOURNAL OF ETHNOPHARMACOLOGY 2015; 162:352-361. [PMID: 25562721 DOI: 10.1016/j.jep.2014.12.059] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Revised: 12/21/2014] [Accepted: 12/25/2014] [Indexed: 06/04/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Cedrela odorata L. (Meliaceae) is a native plant of the Amazon region and its inner stem bark is used in the treatment of diabetes in the form of maceration in Brazilian popular medicine. Until now, there is no scientific study on this activity. The present study was aimed at evaluating the anti-hyperglycemic activity, anti-diabetic, toxicity, antioxidant and potential mechanism of action of hydroethanolic extract of the inner stem bark of Cedrela odorata. MATERIAL AND METHODS The inner stem bark extract of Cedrela odorata was prepared by maceration in 70% ethanol for 7 days to obtain hydroethanolic extract of Cedrela odorata (HeECo). The preliminary phytochemical analysis was performed according to procedures described in the literature. Selected secondary metabolites detected were quantified by high performance liquid chromatography (HPLC). Acute toxicity of HeECo was investigated in male and female mice with oral administration of graded doses of HeECo from 10 to 5000 mg/kg. Subchronic oral toxicity study was done by oral administration of HeECo (500 mg/kg) and vehicle for 30 days to both sexes of Wistar rats. Clinical observations and toxicological related parameters were determined. Blood was collected for biochemical and hematological analyses, while histological examinations were performed on selected organs. Anti-hiperglycemic and antidiabetic effects were evaluated in streptozotocin-induced diabetic rats. In acute evaluation, the animals received pretreatment with 250 and 500 mg/kg of HeECo, before carbohydrate overload. For subchronic effect, the antidiabetic activity of HeECo was evaluated using the same doses for 21 days. At the end of the treatments, the levels of triacylglycerols, malondialdehyde, total antioxidant status, superoxide dismutase and glutathione peroxidase activities were evaluated in the plasma. RESULTS The extract showed low acute toxicity. HeECo exhibited inhibitory activity against α-glucosidase and caused a lowering in the peak levels of blood glucose in animals that received glucose overload by 36.7% and 24.1% in the area under the glucose curve (AUC). When the overload was sucrose, HeECo reduced the blood glucose level by 44.4% without affecting AUC. Treatment with HeECo of the blood glucose of the diabetic animals for 21 days did not lead to improvement in weight gain and regularization of the blood glucose level, but reduced the triacylglycerol and malondialdehyde levels by 36.6% and 48.1%, respectively. The activity of the antioxidant enzymes, superoxide dismutase and glutathione peroxidase were significantly increased when compared to diabetic control rats. HPLC analysis showed the presence of polyphenols, such as gallic acid, (-)- gallocatechin and (+)- catechin, the latter is present in higher quantity. CONCLUSIONS Collectively, these data showed that HeECo could blunt the postprandial glycemic surge in rats; possibly through inhibition of alpha-glucosidase and positive modulation of antioxidant enzymes. Our findings confirmed the anti-hiperglycemic activity of HeECo in STZ- diabetic rats. Cedrela odorata is effective in diminishing glucose levels in vitro and in vivo and in ameliorating oxidative damage that occurs in diabetes and/or due to hyperglycemia in rats. According to our results, the efficacy of Cedrela odorata preparation could be due to the presence of active principles with different mode of actions at the molecular level, including α-glycosidases and glucose transporter inhibitors and antioxidant property.
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Affiliation(s)
- Morenna Alana Giordani
- Department of Chemistry, Biochemistry Laboratory, Federal University of Mato Grosso (UFMT), Avenida Fernando Correa da Costa, 2367, Boa Esperança, CEP: 78060-900, Cuiabá, Mato Grosso, Brazil
| | - Thiago Carvalho Mamede Collicchio
- Natural Products Research Laboratory, Faculty of Medicine, Federal University of Tocantins (UFT), Av. NS15, Palmas, CEP: 77020-210, Palmas, Tocantins, Brazil
| | - Sergio Donizeti Ascêncio
- Natural Products Research Laboratory, Faculty of Medicine, Federal University of Tocantins (UFT), Av. NS15, Palmas, CEP: 77020-210, Palmas, Tocantins, Brazil
| | - Domingos Tabajara de Oliveira Martins
- Department of Basic Health Sciences, Faculty of Medicine, Federal University of Mato Grosso (UFMT), Avenida Fernando Correa da Costa, 2367, Boa Esperança, CEP: 78060-900, Cuiabá, Mato Grosso, Brazil
| | - Sikiru Olaitan Balogun
- Department of Basic Health Sciences, Faculty of Medicine, Federal University of Mato Grosso (UFMT), Avenida Fernando Correa da Costa, 2367, Boa Esperança, CEP: 78060-900, Cuiabá, Mato Grosso, Brazil
| | - Isanete Geraldini Costa Bieski
- Department of Basic Health Sciences, Faculty of Medicine, Federal University of Mato Grosso (UFMT), Avenida Fernando Correa da Costa, 2367, Boa Esperança, CEP: 78060-900, Cuiabá, Mato Grosso, Brazil
| | - Leilane Aparecida da Silva
- Department of Clinical Veterinary Medicine, Federal University of Mato Grosso (UFMT), Avenida Fernando Correa da Costa, 2367, Boa Esperança, CEP: 78060-900, Cuiabá, Mato Grosso, Brazil
| | - Edson Moleta Colodel
- Department of Clinical Veterinary Medicine, Federal University of Mato Grosso (UFMT), Avenida Fernando Correa da Costa, 2367, Boa Esperança, CEP: 78060-900, Cuiabá, Mato Grosso, Brazil
| | - Roberto Lopes de Souza
- Department of Clinical Veterinary Medicine, Federal University of Mato Grosso (UFMT), Avenida Fernando Correa da Costa, 2367, Boa Esperança, CEP: 78060-900, Cuiabá, Mato Grosso, Brazil
| | - Damiana Luiza Pereira de Souza
- Department of Chemistry, Biochemistry Laboratory, Federal University of Mato Grosso (UFMT), Avenida Fernando Correa da Costa, 2367, Boa Esperança, CEP: 78060-900, Cuiabá, Mato Grosso, Brazil
| | - Suélem Aparecida de França
- Department of Chemistry, Biochemistry Laboratory, Federal University of Mato Grosso (UFMT), Avenida Fernando Correa da Costa, 2367, Boa Esperança, CEP: 78060-900, Cuiabá, Mato Grosso, Brazil
| | - Claudia Marlise Balbinotti Andrade
- Department of Chemistry, Biochemistry Laboratory, Federal University of Mato Grosso (UFMT), Avenida Fernando Correa da Costa, 2367, Boa Esperança, CEP: 78060-900, Cuiabá, Mato Grosso, Brazil
| | - Nair Honda Kawashita
- Department of Chemistry, Biochemistry Laboratory, Federal University of Mato Grosso (UFMT), Avenida Fernando Correa da Costa, 2367, Boa Esperança, CEP: 78060-900, Cuiabá, Mato Grosso, Brazil.
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Zeng L, Yan J, Luo L, Zhang D. Effects of Pu-erh tea aqueous extract (PTAE) on blood lipid metabolism enzymes. Food Funct 2015; 6:2008-16. [DOI: 10.1039/c5fo00362h] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Effects of Pu-erh tea aqueous extract (PTAE) on blood lipid metabolism enzymes (e.g.HMGR) are assayedin vitro.
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Affiliation(s)
- Liang Zeng
- College of Food Science
- Southwest University
- Chongqing
- China
- TAETEA Group Postdoctoral Research Station
| | - Jingna Yan
- College of Food Science
- Southwest University
- Chongqing
- China
| | - Liyong Luo
- College of Food Science
- Southwest University
- Chongqing
- China
| | - Dongying Zhang
- College of Longrun Pu-erh Tea
- Yunnan Agricultural University
- Kunming
- China
- TAETEA Group Postdoctoral Research Station
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Nakayama H, Yuito N, Miyata Y, Tamaya K, Tanaka T, Saito Y, Matsui T, Aramaki S, Nagata Y, Tamaru S, Tanaka K. Hypolipidemic Property of a New Fermented Tea Made with Third Crop Green Tea ( Camellia sinensis) Leaves and Unripe Satsuma Mandarin ( Citrus unshiu) Fruits. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2015. [DOI: 10.3136/fstr.21.77] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Hisayuki Nakayama
- Nagasaki Agricultural and Forestry Technical Development Center
- Graduate School of Human Health Science, University of Nagasaki
| | - Naho Yuito
- Department of Nutrition, University of Nagasaki
| | - Yuji Miyata
- Nagasaki Agricultural and Forestry Technical Development Center
| | - Kei Tamaya
- Industrial Technology Center of Nagasaki
| | - Takashi Tanaka
- Graduate School of Biochemical Science, Nagasaki University
| | | | - Toshiro Matsui
- Faculty of Agriculture, Graduate School of Kyushu University
| | | | - Yasuo Nagata
- Center for Industry, University and Government Cooperation, Nagasaki University
- Department of Nutrition, University of Nagasaki
| | | | - Kazunari Tanaka
- Department of Nutrition, University of Nagasaki
- Graduate School of Human Health Science, University of Nagasaki
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Matsuoka R, Shirouchi B, Kawamura S, Baba S, Shiratake S, Nagata K, Imaizumi K, Sato M. Dietary egg white protein inhibits lymphatic lipid transport in thoracic lymph duct-cannulated rats. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:10694-10700. [PMID: 25300535 DOI: 10.1021/jf502741b] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Dietary egg white protein (EWP) decreases serum cholesterol levels. We previously showed that EWP decreased cholesterol absorption in the intestine. Rats subjected to permanent lymph duct cannulation were used to investigate the effects of dietary EWP on lipid transport. They were fed diets with 20% EWP and casein, and their lymph was collected to quantify lymphatic lipid levels. Dietary EWP decreased lymphatic cholesterol transport compared with casein. It was previously shown that EWP excluded cholesterol from bile acid micelles. Therefore, pepsin-hydrolyzed EWP and casein were prepared. EWP was not completely digested. Ovalbumin, which is the most abundant protein in EWP, showed resistance to digestion by pepsin. This study investigated the effects of EWP pepsin hydrolysate (EWP-ph) on cholesterol micellar solubility, cholesterol transfer from the micellar to the oil phase, water-holding capacity (WHC), settling volume in water (SV), and relative viscosity and compared them with the effects of casein pepsin hydrolysate (C-ph). EWP-ph significantly decreased the micellar solubility and transfer rate and increased the WHC, SV, and relative viscosity compared with C-ph. Moreover, the pepsin hydrolysate of ovalbumin, a major protein in EWP, played a role in decreasing cholesterol micellar solubility, leading to the inhibition of cholesterol absorption. In conclusion, dietary EWP decreased cholesterol intestinal absorption by exerting combined effects of these physicochemical properties in the gut.
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Affiliation(s)
- Ryosuke Matsuoka
- Laboratory of Nutrition Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School of Kyushu University , 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
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Huang J, Wang Y, Xie Z, Zhou Y, Zhang Y, Wan X. The anti-obesity effects of green tea in human intervention and basic molecular studies. Eur J Clin Nutr 2014; 68:1075-87. [DOI: 10.1038/ejcn.2014.143] [Citation(s) in RCA: 144] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 05/30/2014] [Accepted: 06/15/2014] [Indexed: 12/14/2022]
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Noratto GD, Garcia-Mazcorro JF, Markel M, Martino HS, Minamoto Y, Steiner JM, Byrne D, Suchodolski JS, Mertens-Talcott SU. Carbohydrate-Free Peach (Prunus persica) and Plum (Prunus salicina) [corrected] Juice Affects Fecal Microbial Ecology in an Obese Animal Model. PLoS One 2014; 9:e101723. [PMID: 25007331 PMCID: PMC4090149 DOI: 10.1371/journal.pone.0101723] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Accepted: 06/10/2014] [Indexed: 01/12/2023] Open
Abstract
Background Growing evidence shows the potential of nutritional interventions to treat obesity but most investigations have utilized non-digestible carbohydrates only. Peach and plum contain high amounts of polyphenols, compounds with demonstrated anti-obesity effects. The underlying process of successfully treating obesity using polyphenols may involve an alteration of the intestinal microbiota. However, this phenomenon is not well understood. Methodology/Principal Findings Obese Zucker rats were assigned to three groups (peach, plum, and control, n = 10 each), wild-type group was named lean (n = 10). Carbohydrates in the fruit juices were eliminated using enzymatic hydrolysis. Fecal samples were obtained after 11 weeks of fruit or control juice administration. Real-time PCR and 454-pyrosequencing were used to evaluate changes in fecal microbiota. Over 1,500 different Operational Taxonomic Units at 97% similarity were detected in all rats. Several bacterial groups (e.g. Lactobacillus and members of Ruminococcacea) were found to be more abundant in the peach but especially in the plum group (plum juice contained 3 times more total polyphenolics compared to peach juice). Principal coordinate analysis based on Unifrac-based unweighted distance matrices revealed a distinct separation between the microbiota of control and treatment groups. These changes in fecal microbiota occurred simultaneously with differences in fecal short-chain acids concentrations between the control and treatment groups as well as a significant decrease in body weight in the plum group. Conclusions This study suggests that consumption of carbohydrate-free peach and plum juice has the potential to modify fecal microbial ecology in an obese animal model. The separate contribution of polyphenols and non-polyphenols compounds (vitamins and minerals) to the observed changes is unknown.
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Affiliation(s)
- Giuliana D. Noratto
- Department of Nutrition and Food Science, Texas A&M University, College Station, Texas, United States of America
| | - Jose F. Garcia-Mazcorro
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Nuevo León, General Escobedo, Nuevo León, México
| | - Melissa Markel
- Gastrointestinal Laboratory, Texas A&M University, College Station, Texas, United States of America
| | - Hercia S. Martino
- Department of Nutrition and Food Science, Texas A&M University, College Station, Texas, United States of America
| | - Yasushi Minamoto
- Gastrointestinal Laboratory, Texas A&M University, College Station, Texas, United States of America
| | - Jörg M. Steiner
- Gastrointestinal Laboratory, Texas A&M University, College Station, Texas, United States of America
| | - David Byrne
- Department of Horticultural Sciences, Texas A&M University, College Station, Texas, United States of America
| | - Jan S. Suchodolski
- Gastrointestinal Laboratory, Texas A&M University, College Station, Texas, United States of America
| | - Susanne U. Mertens-Talcott
- Department of Nutrition and Food Science, Texas A&M University, College Station, Texas, United States of America
- Veterinary Physiology and Pharmacology, Texas A&M University, College Station, Texas, United States of America
- * E-mail:
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Oishi Y, Sakamoto T, Udagawa H, Taniguchi H, Kobayashi-Hattori K, Ozawa Y, Takita T. Inhibition of Increases in Blood Glucose and Serum Neutral Fat byMomordica charantiaSaponin Fraction. Biosci Biotechnol Biochem 2014; 71:735-40. [PMID: 17341830 DOI: 10.1271/bbb.60570] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Focusing on a functional component of Momordica charantia, saponin, we investigated its effects on serum glucose and neutral fat levels. Saponin was extracted as a butanol-soluble fraction (saponin fraction) from hot blast-dried Momordica charantia powder. The disaccharidase-inhibitory activity and the pancreatic lipase-inhibitory activity of the saponin fraction were measured, and in vivo sugar- and lipid-loading tests were performed. The saponin fraction inhibited disaccharidase activity and elevation of the blood glucose level after sucrose loading. The fraction also markedly inhibited pancreatic lipase activity and elevation of the serum neutral fat level after corn oil loading. Based on these findings, the main active component related to the anti-diabetic effect of Momordica charantia is present in the butanol fraction, and it may be saponin. The blood glucose and serum neutral fat-lowering effects of Momordica charantia were closely associated with its inhibitory activity against disaccharidase and pancreatic lipase.
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Affiliation(s)
- Yuichi Oishi
- Department of Nutritional Science, Faculty of Applied Bioscience, Tokyo University of Agriculture, Sakuragaoka, Tokyo, Japan
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Suzuki Y, Unno T, Kobayashi M, Nozawa A, Sagesaka Y, Kakuda T. Dose-Dependent Suppression of Tea Catechins with a Galloyl Moiety on Postprandial Hypertriglyceridemia in Rats. Biosci Biotechnol Biochem 2014; 69:1288-91. [PMID: 16041132 DOI: 10.1271/bbb.69.1288] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Tea has long been believed to be a healthy beverage, and its beneficial effects are almost all attributed to catechins. The effect of catechins on postprandial hypertriglyceridemia in rats was investigated in this study. A lipid emulsion administered orally to rats with (-)-epigallocatechin gallate at a dose of 100 mg/kg resulted in the increase in plasma triacylglycerol being significantly inhibited after 1 and 2 h compared to the case without (-)-epigallocatechin gallate. The effect of (-)-epigallocatechin was weaker than that of (-)-epigallocatechin gallate. A tea extract (THEA-FLAN 90S), mainly composed of catechins with a galloyl moiety, dose-dependently suppressed postprandial triacylglycerol after the administration of a lipid emulsion at doses of 50-200 mg/kg. The administration of the tea extract alone at a dose of 200 mg/kg had no effect on the plasma triacylglycerol level. These results strongly suggest that catechins with a galloyl moiety would be promising agents for suppressing dietary fat absorption through the small intestine.
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Affiliation(s)
- Yuko Suzuki
- Central Research Institute, ITO EN, LTD., Shizuoka 421-0516, Japan.
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Kobayashi M, Nishizawa M, Inoue N, Hosoya T, Yoshida M, Ukawa Y, Sagesaka YM, Doi T, Nakayama T, Kumazawa S, Ikeda I. Epigallocatechin gallate decreases the micellar solubility of cholesterol via specific interaction with phosphatidylcholine. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:2881-90. [PMID: 24628603 DOI: 10.1021/jf405591g] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The mechanisms underlying the effect of epigallocatechin gallate (EGCG) on the micellar solubility of cholesterol were examined. EGCG eliminated both cholesterol and phosphatidylcholine (PC) from bile salt micelles in a dose-dependent manner in vitro. When the bile salt micelles contained a phospholipid other than PC, neither cholesterol nor the phospholipid was eliminated following the addition of EGCG. When vesicles comprised of various phospholipids were prepared and, EGCG was added to the vesicles, EGCG effectively and exclusively eliminated only PC. An intermolecular nuclear Overhauser effect (NOE) was observed between PC and EGCG in bile salt micelles with EGCG added, but not between cholesterol and EGCG, by using a NOE-correlated spectroscopy nuclear magnetic resonance method. The results of binding analyses using surface plasmon resonance (SPR) showed that EGCG did not bind to cholesterol. These observations strongly suggest that EGCG decreases the micellar solubility of cholesterol via specific interaction with PC.
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Affiliation(s)
- Makoto Kobayashi
- Central Research Institute, ITO EN, Ltd. , Shizuoka 421-0516, Japan
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Hodgson AB, Randell RK, Mahabir-Jagessar-T K, Lotito S, Mulder T, Mela DJ, Jeukendrup AE, Jacobs DM. Acute effects of green tea extract intake on exogenous and endogenous metabolites in human plasma. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:1198-1208. [PMID: 24400998 DOI: 10.1021/jf404872y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The acute effects of green tea extract (GTE) on plasma metabolites in vivo are largely unknown. In this parallel, double-blind study, the transient changes in total and free concentrations of catechins were measured in plasma from healthy males following the consumption of a single GTE dose (559.2 mg total catechins, 120.4 mg caffeine). Furthermore, the acute effects on endogenous metabolites were assessed 2 h after GTE intake using four-phase metabolite profiling. The ratios of the catechin concentrations in plasma to those in the GTE followed the order ECG/CG > EC > GCG > EGCG > EGC > C > GC. The gallated catechins EGCG, CG/ECG, GC, and GCG were also present in their free form. Sixteen out of 163 mostly endogenous metabolites were affected by acute GTE ingestion, when compared to placebo. These included caffeine, salicylate, hippurate, taurine, 3,4-dihydroxyphenylethylene-glycol, serotonin, some cholesterylesters, fatty acids, triglycerides, and sphingosines. Our results on the exogenous metabolites largely confirm previous studies, while our findings on the endogenous metabolites are novel and may suggest specific biological targets.
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Affiliation(s)
- Adrian B Hodgson
- School of Sport and Exercise Sciences, University of Birmingham , Edgbaston, Birmingham B15 2TT, United Kingdom
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Chen G, Wang H, Zhang X, Yang ST. Nutraceuticals and Functional Foods in the Management of Hyperlipidemia. Crit Rev Food Sci Nutr 2014; 54:1180-201. [DOI: 10.1080/10408398.2011.629354] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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