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Yu S, Zhu X, Zhao X, Li Y, Niu X, Chen Y, Ying J. Improvement of chronic metabolic inflammation and regulation of gut homeostasis: Tea as a potential therapy. Pharmacol Ther 2025; 269:108828. [PMID: 40020787 DOI: 10.1016/j.pharmthera.2025.108828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 12/27/2024] [Accepted: 02/21/2025] [Indexed: 03/03/2025]
Abstract
Chronic metabolic inflammation is a common mechanism linked to the development of metabolic disorders such as obesity, diabetes, and cardiovascular disease (CVD). Chronic metabolic inflammation often related to alterations in gut homeostasis, and pathological processes involve the activation of endotoxin receptors, metabolic reprogramming, mitochondrial dysfunction, and disruption of intestinal nuclear receptor activity. Recent investigations into homeostasis and chronic metabolic inflammation have revealed a novel mechanism which is characterized by a timing interaction involving multiple components and targets. This article explores the positive impact of tea consumption on metabolic health of populations, with a special focus on the improvement of inflammatory indicators and the regulation of gut microbiota. Studies showed that tea consumption is related to the enrichment of gut microbiota. The relative proportion of Firmicutes/Bacteroidetes (F/B) is altered, while the abundance of Lactobacillus, Bifidobacterium, and A. muciniphila increased significantly in most of the studies. Thus, tea consumption could provide potential protection from the development of chronic diseases by improving gut homeostasis and reducing chronic metabolic inflammation. The direct impact of tea on intestinal homeostasis primarily targets lipopolysaccharide (LPS)-related pathways. This includes reducing the synthesis of intestinal LPS, inhibiting LPS translocation, and preventing the binding of LPS to TLR4 receptors to block downstream inflammatory pathways. The TLR4/MyD88/NF-κB p65 pathway is crucial for anti-metaflammatory responses. The antioxidant properties of tea are linked to enhancing mitochondrial function and mitigating mitochondria-related inflammation by eliminating free radicals, inhibiting NLRP3 inflammasomes, and modulating Nrf2/ARE activity. Tea also contributes to safeguarding the intestinal barrier through various mechanisms, such as promoting the synthesis of short-chain fatty acids in the intestine, activating intestinal aryl hydrocarbon receptor (AhR) and farnesoid X receptor (FXR), and improving enteritis. Functional components that improve chronic metabolic inflammation include tea polyphenols, tea pigments, TPS, etc. Tea metabolites such as 4-Hydroxyphenylacetic acid and 3,4-Dihydroxyflavan derivatives, etc., also contribute to anti-chronic metabolic inflammation effects of tea consumption. The raw materials and processing technologies affect the functional component compositions of tea; therefore, consuming different types of tea may result in varying action characteristics and mechanisms. However, there is currently limited elaboration on this aspect. Future research should conduct in-depth studies on the mechanism of tea and its functional components in improving chronic metabolic inflammation. Researchers should pay attention to whether there are interactions between tea and other foods or drugs, explore safe and effective usage and dosage, and investigate whether there are individual differences in the tea-drinking population leading to different effects of tea intervention. Ultimately, the application of tea drinking could be a universal therapy for regulating intestinal homeostasis, anti-chronic metabolic inflammatory responses, and promoting metabolic health.
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Affiliation(s)
- Shiyi Yu
- Nutrition and Health Research Institute, School of Life Science and Technology, Wuhan Polytechnic University, Wuhan 430000, China
| | - Xuan Zhu
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Xiayu Zhao
- National Institute of Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - Yan Li
- National Institute of Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - Xinghe Niu
- Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing 210023, China; COFCO Nutrition and Health Research Institute, Beijing 102209, China
| | - Yinghua Chen
- Nutrition and Health Research Institute, School of Life Science and Technology, Wuhan Polytechnic University, Wuhan 430000, China
| | - Jian Ying
- Nutrition and Health Research Institute, School of Life Science and Technology, Wuhan Polytechnic University, Wuhan 430000, China.
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Chou MY, Lin-Shiau SY. Non-steroidal anti-inflammatory drugs (NSAIDs) regimens enhance synergistic selective anticancer efficacy of chemotherapeutic agents on cultured cells. J Dent Sci 2025; 20:1175-1195. [PMID: 40224060 PMCID: PMC11993116 DOI: 10.1016/j.jds.2025.01.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2025] [Revised: 01/19/2025] [Indexed: 04/15/2025] Open
Abstract
Background/purpose Cancer incidences are rising, presenting challenges due to severe side effects and resistance of chemotherapeutic agents. To address these issues, we propose a strategy involving pharmaceutical compositions of PTM (Phytopolyphenols, Targeting drugs, Metals) regimens. This study aimed to investigate NSAIDs (Non-steroidal anti-inflammatory drugs)-PTM regimens enhancing anticancer selectivity and efficacy of chemotherapeutic agents on cultured cancer cells. Materials and methods Effects of drugs on proliferation of cultured cancer cells and pathogens was assessed using MTT assay and optical density at 600 nm (OD600) respectively. Synergistic effects of drug combinations were determined using combination index and efficacy index. ATPase activity was assayed using a colorimetric method. Results NSAIDs-PTM regimens demonstrated selective and synergistic anticancer effects. They also enhanced anticancer selectivity and efficacy of Cisplatin, 5-Fluorouracil, and Methotrexate. The most effective NSAIDs-PTM regimens increased anticancer efficacy by 16, 4, and 23 fold against oral, lung, and colon cancer cell lines, respectively. Additionally, these NSAIDs-PTM regimens enhanced selective anticancer efficacy of Cisplatin, 5-Fluorouracil, and Methotrexate by 8-21 fold on the three cancer cells. Furthermore, all regimens exhibited synergistic anti-efflux pump ATPase activity and antibacterial effects against four cultured pathogens. Conclusion The findings indicate that NSAIDs-PTM regimens not only possess synergistic and selective anticancer and antibacterial properties but also enhance anticancer selectivity and efficacy of Cisplatin, 5-Fluorouracil, and Methotrexate. Notably, all regimens exhibited anti-efflux pump ATPase, which may help overcome multidrug resistance in cancer treatment. Given that all components of PTM regimens are clinically effective and safe, further clinical studies are warranted.
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Affiliation(s)
- Ming-Yung Chou
- School of Dentistry, College of Oral Medicine, Chung Shan Medical University, Taichung, Taiwan
| | - Shoei-Yn Lin-Shiau
- School of Dentistry, College of Oral Medicine, Chung Shan Medical University, Taichung, Taiwan
- Department of Pharmacology, College of Medicine, National Taiwan University, Taipei, Taiwan
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Cheng L, Wei Y, Xu L, Peng L, Wang Y, Wei X. Gut Microbiota Differentially Mediated by Qingmao Tea and Qingzhuan Tea Alleviated High-Fat-Induced Obesity and Associated Metabolic Disorders: The Impact of Microbial Fermentation. Foods 2022; 11:3210. [PMCID: PMC9601715 DOI: 10.3390/foods11203210] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Although dark tea is a unique microbial-fermented tea with a high reputation for having an antiobesity effect, little is known about the effect of microbial fermentation on tea leaves’ antiobesity properties. This study compared the antiobesity effects of microbial-fermented Qingzhuan tea (QZT) and unfermented Qingmao tea (QMT), providing insight into their underlying mechanisms associated with gut microbiota. Our results indicated that the supplementation of QMT extract (QMTe) and QZT extract (QZTe) displayed similar antiobesity effects in high-fat diet (HFD)-fed mice, but the hypolipidemic effect of QZTe was significantly stronger than that of QMTe. The microbiomic analysis indicated that QZTe was more effective than QMTe at regulating HFD-caused gut microbiota dysbiosis. Akkermansiaceae and Bifidobacteriaceae, which have negative correlations with obesity, were enhanced notably by QZTe, whereas Faecalibaculum and Erysipelotrichaceae, which are positively correlated with obesity, were decreased dramatically by QMTe and QZTe. A Tax4Fun analysis of QMTe/QZTe-mediated gut microbiota revealed that QMTe supplementation drastically reversed the HFD-induced upregulation of glycolysis and energy metabolism, whereas QZTe supplementation significantly restored the HFD-caused downregulation of pyruvate metabolism. Our findings suggested that microbial fermentation showed a limited effect on tea leaves’ antiobesity, but enhanced their hypolipidemic activity, and QZT could attenuate obesity and associated metabolic disorders by favorably modulating gut microbiota.
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Affiliation(s)
- Lizeng Cheng
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Yang Wei
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Lurong Xu
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Lanlan Peng
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Yuanfeng Wang
- College of Life Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
- Correspondence: (Y.W.); (X.W.); Tel.: +86-18616184495 (Y.W.); +86-021-34208533 (X.W.)
| | - Xinlin Wei
- School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
- Correspondence: (Y.W.); (X.W.); Tel.: +86-18616184495 (Y.W.); +86-021-34208533 (X.W.)
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Chávez-Castillo M, Nuñez V, Rojas M, Ortega Á, Durán P, Pirela D, Marquina M, Cano C, Chacín M, Velasco M, Rojas-Quintero J, Bermúdez V. Exploring Phytotherapeutic Alternatives for Obesity, Insulin Resistance and Diabetes Mellitus. Curr Pharm Des 2021; 26:4430-4443. [PMID: 32611293 DOI: 10.2174/1381612826666200701205132] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 05/29/2020] [Indexed: 11/22/2022]
Abstract
At present, the pathologic spectrum of obesity-insulin resistance (IR)-diabetes mellitus (DM) represents not only a pressing matter in public health but also a paramount object of study in biomedical research, as they constitute major risk factors for cardiovascular disease (CVD), and other chronic non-communicable diseases (NCD). Phytotherapy, the use of medicinal herbs (MH) with treatment purposes, offers a wide array of opportunities for innovation in the management of these disorders; mainly as pharmacological research on small molecules accumulates. Several MH has displayed varied mechanisms of action relevant to the pathogenesis of obesity, IR and DM, including immunological and endocrine modulation, reduction of inflammation and oxidative stress (OS), regulation of appetite, thermogenesis and energy homeostasis, sensitisation to insulin function and potentiation of insulin release, among many others. However, the clinical correlates of these molecular phenomena remain relatively uncertain, with only a handful of MH boasting convincing clinical evidence in this regard. This review comprises an exploration of currently available preclinical and clinical research on the role of MH in the management of obesity, IR, and DM.
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Affiliation(s)
- Mervin Chávez-Castillo
- Psychiatric Hospital of Maracaibo, Maracaibo, Venezuela,Endocrine and Metabolic Diseases Research Center, School of Medicine, University of Zulia, Maracaibo, Venezuela
| | - Victoria Nuñez
- Endocrine and Metabolic Diseases Research Center, School of Medicine, University of Zulia, Maracaibo, Venezuela
| | - Milagros Rojas
- Endocrine and Metabolic Diseases Research Center, School of Medicine, University of Zulia, Maracaibo, Venezuela
| | - Ángel Ortega
- Endocrine and Metabolic Diseases Research Center, School of Medicine, University of Zulia, Maracaibo, Venezuela
| | - Pablo Durán
- Endocrine and Metabolic Diseases Research Center, School of Medicine, University of Zulia, Maracaibo, Venezuela
| | - Daniela Pirela
- Endocrine and Metabolic Diseases Research Center, School of Medicine, University of Zulia, Maracaibo, Venezuela
| | - María Marquina
- Endocrine and Metabolic Diseases Research Center, School of Medicine, University of Zulia, Maracaibo, Venezuela
| | - Clímaco Cano
- Endocrine and Metabolic Diseases Research Center, School of Medicine, University of Zulia, Maracaibo, Venezuela
| | - Maricarmen Chacín
- Universidad Simón Bolívar, Facultad de Ciencias de la Salud, Barranquilla, Colombia
| | - Manuel Velasco
- Clinical Pharmacology Unit, José María Vargas School of Medicine, Central University of Venezuela, Caracas-Venezuela
| | - Joselyn Rojas-Quintero
- Pulmonary and Critical Care Medicine Department, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Valmore Bermúdez
- Universidad Simón Bolívar, Facultad de Ciencias de la Salud, Barranquilla, Colombia
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Payab M, Hasani-Ranjbar S, Shahbal N, Qorbani M, Aletaha A, Haghi-Aminjan H, Soltani A, Khatami F, Nikfar S, Hassani S, Abdollahi M, Larijani B. Effect of the herbal medicines in obesity and metabolic syndrome: A systematic review and meta-analysis of clinical trials. Phytother Res 2019; 34:526-545. [PMID: 31793087 DOI: 10.1002/ptr.6547] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Revised: 09/18/2019] [Accepted: 10/24/2019] [Indexed: 12/12/2022]
Abstract
Obesity is a medical situation in which excess body fat has gathered because of imbalance between energy intake and energy expenditure. In spite of the fact that the variety of studies are available for obesity treatment and management, its "globesity" still remains a big challenge all over the world. The current systematic review and meta-analysis aimed to evaluate the efficacy, safety, and mechanisms of effective herbal medicines in the management and treatment of obesity and metabolic syndrome in human. We systematically searched all relevant clinical trials via Web of Science, Scopus, PubMed, and the Cochrane database to assess the effects of raw or refined products derived from plants or parts of plants on obesity and metabolic syndrome in overweight and obesity adult subjects. All studies conducted by the end of May 2019 were considered in the systematic review. Data were extracted independently by two experts. The quality assessment was assessed using Consolidated Standards of Reporting Trials checklist. The main outcomes were anthropometric indices and metabolic syndrome components. Pooled effect of herbal medicines on obesity and metabolic syndrome were presented as standardized mean difference (SMD) and 95% confidence interval (CI). A total of 279 relevant clinical trials were included. Herbals containing green tea, Phaseolus vulgaris, Garcinia cambogia, Nigella sativa, puerh tea, Irvingia gabonensis, and Caralluma fimbriata and their active ingredients were found to be effective in the management of obesity and metabolic syndrome. In addition, C. fimbriata, flaxseed, spinach, and fenugreek were able to reduce appetite. Meta-analysis showed that intake of green tea resulted in a significant improvement in weight ([SMD]: -0.75 [-1.18, -0.319]), body mass index ([SMD]: -1.2 [-1.82, -0.57]), waist circumference ([SMD]: -1.71 [-2.66, -0.77]), hip circumference ([SMD]: -0.42 [-1.02, -0.19]), and total cholesterol, ([SMD]: -0.43 [-0.77, -0.09]). In addition, the intake of P. vulgaris and N. sativa resulted in a significant improvement in weight ([SMD]: -0.88, 95 % CI: [-1.13, -0.63]) and triglyceride ([SMD]: -1.67, 95 % CI: [-2.54, -0.79]), respectively. High quality trials are still needed to firmly establish the clinical efficacy of the plants in obesity and metabolic syndrome.
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Affiliation(s)
- Moloud Payab
- Obesity and Eating Habits Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Shirin Hasani-Ranjbar
- Obesity and Eating Habits Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Nazila Shahbal
- Non-Communicable Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Mostafa Qorbani
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran.,Non-communicable Diseases Research Center, Alborz University of Medical Sciences, Karaj, Iran
| | - Azadeh Aletaha
- Evidence Based Medicine Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of medical Sciences, Tehran, Iran
| | - Hamed Haghi-Aminjan
- Pharmaceutical Science Research Center, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Akbar Soltani
- Evidence Based Medicine Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of medical Sciences, Tehran, Iran
| | - Fatemeh Khatami
- Chronic Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Shekoufeh Nikfar
- Department of Pharmacoeconomics and Pharmaceutical Administration, Faculty of Pharmacy, and Evidence-based Evaluation of Cost-Effectiveness and Clinical Outcomes Group, Pharmaceutical Science Research Center (PSRC), The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences, Tehran, Iran
| | - Shokoufeh Hassani
- Toxicology and Diseases Group (TDG), Pharmaceutical Science Research Center (PSRC), The Institute of Pharmaceutical Sciences (TIPS), and Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Abdollahi
- Toxicology and Diseases Group (TDG), Pharmaceutical Science Research Center (PSRC), The Institute of Pharmaceutical Sciences (TIPS), and Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Bagher Larijani
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
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6
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Li X, Wang W, Hou L, Wu H, Wu Y, Xu R, Xiao Y, Wang X. Does tea extract supplementation benefit metabolic syndrome and obesity? A systematic review and meta-analysis. Clin Nutr 2019; 39:1049-1058. [PMID: 31174941 DOI: 10.1016/j.clnu.2019.05.019] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 04/23/2019] [Accepted: 05/16/2019] [Indexed: 01/03/2023]
Abstract
BACKGROUND Given the global epidemic of obesity, numerous strategies have been employed in the management of metabolic syndrome (MS) in this population. A meta-analysis was designed in the present investigation to evaluate the benefits of tea extract (TE) supplementation in MS in obesity. METHODS We conducted searches of published literature in MEDLINE, PsycINFO, Scopus, EMBASE, and the Cochrane Central Register of Controlled Trials (CENTRAL) databases from inception in 1985 to May 2017. Randomized controlled trials (RCTs) which studied TE consumption in obesity with MS were analyzed. Results were summarized using weighted mean differences (WMDs), standardized mean differences (SMDs) or odds ratio (OR) by suitable effect model. RESULTS Sixteen eligible randomized controlled trials, including 1090 subjects were identified. Benefits were demonstrated on reduction of Body Mass Index (BMI) (SMD, -0.27; 95% CI, -0.40 to -0.15, P < 0.0001) and blood glucose (SMD, -0.22; 95% CI, -0.34 to -0.10, P = 0.0003), and increasing high-density lipoprotein (HDL) (SMD, 0.18; 95% CI, 0.01 to 0.35, P = 0.03). Limited benefits without significance were observed on blood pressure and other anthropometric, cholesterol, and biochemistry outcomes. All-cause adverse events were minimal (0.99; 95% CI: 0.55, 1.77, P = 0.97). CONCLUSIONS This meta-analysis suggests that consumption of TE supplementation in the obese with MS has beneficial effects on improvement of lipid and glucose metabolism, as well as in the facilitation of weight loss.
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Affiliation(s)
- Xiumin Li
- Department of Geriatrics, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, PR China
| | - Wen Wang
- Department of Radiology & Functional and Molecular Imaging Key Lab of Shaanxi Province, Tangdu Hospital, Fourth Military Medical University, 569 Xinsi Road, Xi'an, 710038, Shaanxi, PR China
| | - Liming Hou
- Department of Geriatrics, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, PR China
| | - Huanghui Wu
- Department of Anesthesiology, Fuzhou General Hospital of Nanjing Military Region, Fuzhou 350025, PR China
| | - Yongjie Wu
- Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, PR China
| | - Rong Xu
- Department of Geriatrics, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, PR China
| | - Yuan Xiao
- Department of Geriatrics, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, PR China
| | - Xiaoming Wang
- Department of Geriatrics, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, PR China.
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Loureiro G, Martel F. The effect of dietary polyphenols on intestinal absorption of glucose and fructose: Relation with obesity and type 2 diabetes. FOOD REVIEWS INTERNATIONAL 2019. [DOI: 10.1080/87559129.2019.1573432] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Guilherme Loureiro
- Department of Biomedicine, Unit of Biochemistry, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Fátima Martel
- Department of Biomedicine, Unit of Biochemistry, Faculty of Medicine, University of Porto, Porto, Portugal
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
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8
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Francini-Pesenti F, Spinella P, Calò LA. Potential role of phytochemicals in metabolic syndrome prevention and therapy. Diabetes Metab Syndr Obes 2019; 12:1987-2002. [PMID: 31632110 PMCID: PMC6778731 DOI: 10.2147/dmso.s214550] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Accepted: 07/09/2019] [Indexed: 12/20/2022] Open
Abstract
Metabolic syndrome (MetS) is a set of cardiovascular risk factors which severely increases the risk of type II diabetes, renal disease and cardiovascular disease. Over the last decades, the role of dietary bioactive substances in features of MetS has been extensively investigated. Due to their multiple properties, these plant-derived natural compounds have demonstrated to provide positive effects in obesity, diabetes, renal and in cardiovascular disease. Catechins of green tea and caffeine reduce body mass index and waist circumference. Catechins, anthocyanins and proanthocyanidins of cocoa reduce blood pressure and blood glucose. Curcumin and silymarin exert hepatoprotective effects. Monacolins of red yeast rice are effective cholesterol-lowering agents. However, inconsistent or conflicting results have been found in clinical trials when other promising compounds in vitro or in animal studies, such as policosanol, curcumin or silymarin, were used. Low oral bioavailability of substances, ineffective dosages, inadequate treatment duration and insufficient statistical approach may explain the lack of effectiveness observed in some human studies. Further clinical studies are needed to better understand the role of bioactive compounds in the prevention and management of MetS.
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Affiliation(s)
| | - Paolo Spinella
- Department of Medicine (DIMED), Nutrition Unit, University of Padova-Azienda Ospedaliera, Padova, Italy
| | - Lorenzo A Calò
- Department of Medicine (DIMED), Nephrology, Dialysis and Transplantation Unit, University of Padova-Azienda Ospedaliera, Padova, Italy
- Correspondence: Lorenzo A CalòDepartment of Medicine, Nephrology, Dialysis and Transplantation Unit, University of Padova-Azienda Ospedaliera, Via Giustiniani 2, Padova35128, ItalyTel +39 049 821 3071Fax +39 049 821 7921Email
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Wang Q, Šarkanj B, Jurasovic J, Chisti Y, Sulyok M, Gong J, Sirisansaneeyakul S, Komes D. Evaluation of microbial toxins, trace elements and sensory properties of a high‐theabrownins instant Pu‐erh tea produced using
Aspergillus tubingensis
via submerged fermentation. Int J Food Sci Technol 2018. [DOI: 10.1111/ijfs.14017] [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]
Affiliation(s)
- Qiuping Wang
- College of Food Science and Technology Yunnan Agricultural University Heilong Tan Kunming 650201 China
| | - Bojan Šarkanj
- Department of Food Technology University Center Koprivnica University North Trg dr. Žarka Dolinara 1 Koprivnica 48000 Croatia
| | - Jasna Jurasovic
- Institute for Medical Research and Occupational Health Ksaverska Cesta 2 Zagreb 10001 Croatia
| | - Yusuf Chisti
- School of Engineering Massey University Private Bag 11 222 Palmerston North New Zealand
| | - Michael Sulyok
- Center for Analytical Chemistry Department of Agrobiotechnology (IFA‐Tulln) University of Natural Resources and Life Sciences Vienna (BOKU) Konrad Lorenzstr. 20 A‐3430 Tulln Austria
| | - Jiashun Gong
- College of Food Science and Technology Yunnan Agricultural University Heilong Tan Kunming 650201 China
| | - Sarote Sirisansaneeyakul
- Faculty of Agro‐Industry Kasetsart University 50 Ngam Wong Wan Road Ladyao Chatuchak Bangkok 10900 Thailand
| | - Draženka Komes
- Faculty of Food Technology and Biotechnology University of Zagreb Pierrotijeva 6 Zagreb 10000 Croatia
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Coelho PG, Pippenger B, Tovar N, Koopmans SJ, Plana NM, Graves DT, Engebretson S, van Beusekom HMM, Oliveira PGFP, Dard M. Effect of Obesity or Metabolic Syndrome and Diabetes on Osseointegration of Dental Implants in a Miniature Swine Model: A Pilot Study. J Oral Maxillofac Surg 2018; 76:1677-1687. [PMID: 29572133 PMCID: PMC6064394 DOI: 10.1016/j.joms.2018.02.021] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2018] [Revised: 01/29/2018] [Accepted: 02/19/2018] [Indexed: 12/12/2022]
Abstract
PURPOSE The increasing prevalence of obesity or metabolic syndrome (O/MS) and type 2 diabetes mellitus (DM) remains a global health concern. Clinically relevant and practical translational models mimicking human characteristics of these conditions are lacking. This study aimed to demonstrate proof of concept of the induction of stable O/MS and type 2 DM in a Göttingen minipig model and validate both of these disease-adjusted Göttingen minipig models as impaired healing models for the testing of dental implants. MATERIALS AND METHODS Nine minipigs were split into 3 groups-control (normal diet), obese (cafeteria diet), and diabetic (cafeteria diet plus low-dosage streptozotocin)-followed by placement of dental implants. Inflammatory markers including tumor necrosis factor α, C-reactive protein, and cortisol were recorded for each study group. Removal torque was measured, and histomorphometric analysis (bone-to-implant contact and bone area fraction occupancy) was performed. RESULTS O/MS pigs showed, on average, a 2-fold increase in plasma C-reactive protein (P < .05) and cortisol (P < .09) concentrations compared with controls; DM pigs showed, on average approximately, a 40-fold increase in plasma tumor necrosis factor α levels (P < .05) and a 2-fold increase in cortisol concentrations (P < .05) compared with controls. The impact of O/MS and DM on implants was determined. The torque to interface failure was highest in the control group (200 N-cm) and significantly lower in the O/MS (90 N-cm) and DM (60 N-cm) groups (P < .01). Bone formation around implants was significantly greater in the control group than in the O/MS and DM groups (P < .02). CONCLUSIONS Both O/MS and DM minipigs express a human-like disease phenotype, and both presented bone-healing impairment around dental implants. Our finding of no significant difference between type 2 DM and O/MS in bone formation around implants provides evidence that further investigation of the impact of O/MS is warranted.
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Affiliation(s)
- Paulo G Coelho
- Professor, Department of Biomaterials and Department of Periodontology and Implant Dentistry, New York University College of Dentistry, New York, NY; and Professor, Hanjorg Wyss Department of Plastic Surgery, New York University Langone Medical Center, New York, NY; and Professor, Department of Mechanical and Aerospace Engineering, New York University Tandon School of Engineering.
| | | | - Nick Tovar
- Adjunct Scientist, Department of Biomaterials, New York University College of Dentistry, New York, NY
| | - Sietse-Jan Koopmans
- Senior Scientist, Livestock Research, Wageningen University and Research Center, Wageningen, Netherlands
| | - Natalie M Plana
- Research Fellow (NIDCR), Department of Biomaterials, New York University Langone Medical Center, New York, NY
| | - Dana T Graves
- Professor, Department of Periodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA
| | - Steve Engebretson
- Associate Professor, Department of Periodontology and Implant Dentistry, New York University College of Dentistry, New York, NY
| | - Heleen M M van Beusekom
- Assistant Professor, Department of Cardiology, Erasmus University Rotterdam, Rotterdam, Netherlands
| | - Paula G F P Oliveira
- Visiting Scholar, Department of Biomaterials, New York University College of Dentistry, New York, NY
| | - Michel Dard
- Associate Professor, Section of Oral, Diagnostic and Rehabilitation Sciences, College of Dental Medicine, Columbia University, New York, NY; and Global Medical Director, Straumann Group, Basel, Switzerland
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11
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Huang S, Li J, Wu Y, Ranjbar S, Xing A, Zhao H, Wang Y, Shearer GC, Bao L, Lichtenstein AH, Wu S, Gao X. Tea Consumption and Longitudinal Change in High-Density Lipoprotein Cholesterol Concentration in Chinese Adults. J Am Heart Assoc 2018; 7:JAHA.118.008814. [PMID: 29941658 PMCID: PMC6064891 DOI: 10.1161/jaha.118.008814] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Background The relation between tea consumption and age‐related changes in high‐density lipoprotein cholesterol (HDL‐C) concentrations remains unclear, and longitudinal human data are limited. The aim of current study was to examine the relation between tea intake and longitudinal change in HDL‐C concentrations. Methods and Results Baseline (2006) tea consumption was assessed via a questionnaire, and plasma HDL‐C concentrations were measured in 2006, 2008, 2010, and 2012 among 80 182 individuals (49±12 years of age) who did not have cardiovascular diseases or cancer, or did not use cholesterol‐lowering agents both at baseline (2006) and during the follow‐up period (2006–2012). The associations between baseline tea consumption and rate of change in HDL‐C concentrations were examined using generalized estimating equation models. Tea consumption was inversely associated with a decreased rate of HDL‐C concentrations (P‐trend <0.0001) in the fully adjusted model. The adjusted mean difference in the HDL‐C decreased rate was 0.010 (95% confidence interval, 0.008, 0.012) mmol/L per year for tea consumers versus nonconsumers (never or less than once/month group). Interactions between tea consumption and age, sex, lifestyle scores, and metabolic syndrome (all P‐interaction <0.0001) were identified. The associations between greater tea consumption and slower decrease in HDL‐C concentrations were more pronounced in men, individuals aged 60 or older, individuals with a lower lifestyle score, and individuals with metabolic syndrome (all P‐trend <0.0001). Conclusions Tea consumption was associated with slower age‐related decreases in HDL‐C concentrations during 6 years of follow‐up. Clinical Trial Registration URL: http://www.chictr.org. Unique identifier: ChiCTR‐TNRC‐11001489.
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Affiliation(s)
- Shue Huang
- Department of Nutritional Sciences, The Pennsylvania State University, State College, PA
| | - Junjuan Li
- Department of Nephrology, Kailuan Hospital, Tangshan, China
| | - Yuntao Wu
- Department of Cardiology, Kailuan Hospital, Tangshan, China
| | - Sareh Ranjbar
- Department of Agriculture, University of Kentucky, Lexington, KY
| | - Aijun Xing
- Department of Cardiology, Kailuan Hospital, Tangshan, China
| | - Haiyan Zhao
- Department of Cardiology, Kailuan Hospital, Tangshan, China
| | - Yanxiu Wang
- Department of Cardiology, Kailuan Hospital, Tangshan, China
| | - Gregory C Shearer
- Department of Nutritional Sciences, The Pennsylvania State University, State College, PA
| | - Le Bao
- Department of Statistics, The Pennsylvania State University, State College, PA
| | - Alice H Lichtenstein
- Jean Mayer U.S. Department of Agriculture (USDA) Human Nutrition Research Center on Aging, Tufts University, Boston, MA
| | - Shouling Wu
- Department of Cardiology, Kailuan Hospital, Tangshan, China
| | - Xiang Gao
- Department of Nutritional Sciences, The Pennsylvania State University, State College, PA
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12
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Law VK, Li KK, Lam AK. Caffeine Consumption from Drinking Tea in Chinese “Dim Sum” Meal. J Caffeine Adenosine Res 2018. [DOI: 10.1089/caff.2017.0031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Victoria K.M. Law
- Laboratory of Experimental Optometry, School of Optometry, The Hong Kong Polytechnic University, Hong Kong SAR, China
| | - King-kit Li
- Laboratory of Experimental Optometry, School of Optometry, The Hong Kong Polytechnic University, Hong Kong SAR, China
| | - Andrew K.C. Lam
- Laboratory of Experimental Optometry, School of Optometry, The Hong Kong Polytechnic University, Hong Kong SAR, China
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13
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González-Sarrías A, Combet E, Pinto P, Mena P, Dall’Asta M, Garcia-Aloy M, Rodríguez-Mateos A, Gibney ER, Dumont J, Massaro M, Sánchez-Meca J, Morand C, García-Conesa MT. A Systematic Review and Meta-Analysis of the Effects of Flavanol-Containing Tea, Cocoa and Apple Products on Body Composition and Blood Lipids: Exploring the Factors Responsible for Variability in Their Efficacy. Nutrients 2017. [PMCID: PMC5537860 DOI: 10.3390/nu9070746] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Several randomized controlled trials (RCTs) and meta-analyses support the benefits of flavanols on cardiometabolic health, but the factors affecting variability in the responses to these compounds have not been properly assessed. The objectives of this meta-analysis were to systematically collect the RCTs-based-evidence of the effects of flavanol-containing tea, cocoa and apple products on selected biomarkers of cardiometabolic risk and to explore the influence of various factors on the variability in the responses to the consumption of these products. A total of 120 RCTs were selected. Despite a high heterogeneity, the intake of the flavanol-containing products was associated using a random model with changes (reported as standardized difference in means (SDM)) in body mass index (−0.15, p < 0.001), waist circumference (−0.29, p < 0.001), total-cholesterol (−0.21, p < 0.001), LDL-cholesterol (−0.23, p < 0.001), and triacylglycerides (−0.11, p = 0.027), and with an increase of HDL-cholesterol (0.15, p = 0.005). Through subgroup analyses, we showed the influence of baseline-BMI, sex, source/form of administration, medication and country of investigation on some of the outcome measures and suggest that flavanols may be more effective in specific subgroups such as those with a BMI ≥ 25.0 kg/m2, non-medicated individuals or by specifically using tea products. This meta-analysis provides the first robust evidence of the effects induced by the consumption of flavanol-containing tea, cocoa and apple products on weight and lipid biomarkers and shows the influence of various factors that can affect their bioefficacy in humans. Of note, some of these effects are quantitatively comparable to those produced by drugs, life-style changes or other natural products. Further, RCTs in well-characterized populations are required to fully comprehend the factors affecting inter-individual responses to flavanol and thereby improve flavanols efficacy in the prevention of cardiometabolic disorders.
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Affiliation(s)
- Antonio González-Sarrías
- Research Group on Quality, Safety and Bioactivity of Plant Foods, Campus de Espinardo, Centro de Edafologia y Biologia Aplicada del Segura-Consejo Superior de Investigaciones Científicas (CEBAS-CSIC), P.O. Box 164, 30100 Murcia, Spain
- Correspondence: (A.G.-S.); (M.-T.G.-C.); Tel.: +34-968-396276 (A.G.-S. & M.-T.G.-C.); Fax: +34-968-396213(A.G.-S. & M.-T.G.-C.)
| | - Emilie Combet
- Human Nutrition, School of Medicine, Dentistry and Nursing, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G31 2ER, UK;
| | - Paula Pinto
- Polytechnic Institute of Santarem, Escola Superior Agrária (ESA), Department of Food Technology, Biotechnology and Nutrition, 2001-904 Santarém, Portugal;
| | - Pedro Mena
- Human Nutrition Unit, Department of Food & Drug, University of Parma, 43125 Parma, Italy; (P.M.); (M.D.)
| | - Margherita Dall’Asta
- Human Nutrition Unit, Department of Food & Drug, University of Parma, 43125 Parma, Italy; (P.M.); (M.D.)
| | - Mar Garcia-Aloy
- Biomarkers and Nutrimetabolomic Laboratory, Department of Nutrition, Food Sciences and Gastronomy, University of Barcelona, 08028 Barcelona, Spain;
- CIBER de Fragilidad y Envejecimiento Saludable (CIBERFES), Instituto de Salud Carlos III, 08028 Barcelona, Spain
| | - Ana Rodríguez-Mateos
- Division of Diabetes and Nutritional Sciences, King’s College London, London SE1 9NH, UK;
| | - Eileen R. Gibney
- Institute of Food and Health, School of Agriculture and Food Science, University College Dublin (UCD), Belfield, Dublin 4, Ireland;
| | - Julie Dumont
- U1167-RID-AGE-Facteurs de risque et Déterminants Moléculaires des Maladies Liées au Vieillissement, University Lille, Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Universitaire (CHU) Lille, Institut Pasteur de Lille, F-59000 Lille, France;
| | - Marika Massaro
- National Research Council (CNR), Institute of Clinical Physiology, 73100 Lecce, Italy;
| | - Julio Sánchez-Meca
- Department of Basic Psychology & Methodology, Faculty of Psychology, University of Murcia, 30100 Murcia, Spain;
| | - Christine Morand
- Institut National de la Recherche Agronomique (INRA), Human Nutrition Unit, Université Clermont Auvergne (UCA), Centre de Recherches en Nutrition Humaine (CRNH) Auvergne, F-63000 Clermont-Ferrand, France;
| | - María-Teresa García-Conesa
- Research Group on Quality, Safety and Bioactivity of Plant Foods, Campus de Espinardo, Centro de Edafologia y Biologia Aplicada del Segura-Consejo Superior de Investigaciones Científicas (CEBAS-CSIC), P.O. Box 164, 30100 Murcia, Spain
- Correspondence: (A.G.-S.); (M.-T.G.-C.); Tel.: +34-968-396276 (A.G.-S. & M.-T.G.-C.); Fax: +34-968-396213(A.G.-S. & M.-T.G.-C.)
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14
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Amiot MJ, Riva C, Vinet A. Effects of dietary polyphenols on metabolic syndrome features in humans: a systematic review. Obes Rev 2016; 17:573-86. [PMID: 27079631 DOI: 10.1111/obr.12409] [Citation(s) in RCA: 285] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 02/16/2016] [Accepted: 02/16/2016] [Indexed: 12/13/2022]
Abstract
Dietary polyphenols constitute a large family of bioactive substances potential beneficial effect on metabolic syndrome (MetS). This review summarizes the results of clinical studies on patients with MetS involving the chronic supplementation of a polyphenol-rich diet, foods, extracts or with single phenolics on the features of MetS (obesity, dyslipidemia, blood pressure and glycaemia) and associated complications (oxidative stress and inflammation). Polyphenols were shown to be efficient, especially at higher doses, and there were no specific foods or extracts able to alleviate all the features of MetS. Green tea, however, significantly reduced body mass index and waist circumference and improved lipid metabolism. Cocoa supplementation reduced blood pressure and blood glucose. Soy isoflavones, citrus products, hesperidin and quercetin improved lipid metabolism, whereas cinnamon reduced blood glucose. In numerous clinical studies, antioxidative and anti-inflammatory effects were not significant after polyphenol supplementation in patients with MetS. However, some trials pointed towards an improvement of endothelial function in patients supplemented with cocoa, anthocyanin-rich berries, hesperidin or resveratrol. Therefore, diets rich in polyphenols, such as the Mediterranean diet, which promote the consumption of diverse polyphenol-rich products could be an effective nutritional strategy to improve the health of patients with MetS. © 2016 The Authors. Obesity Reviews published by John Wiley & Sons Ltd on behalf of World Obesity.
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Affiliation(s)
- M J Amiot
- Unité Mixte de Recherche (UMR) 'Nutrition, Obesity and Risk of Thrombosis', Institut National de la Recherche Agronomique, Paris, France.,Institut National de la Santé et de la Recherche Médicale, Paris, France.,Aix-Marseille Université, Marseille, France
| | - C Riva
- LaPEC, EA4278, Université d'Avignon, Avignon, France
| | - A Vinet
- LaPEC, EA4278, Université d'Avignon, Avignon, France
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15
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Isolation, Identification, and Biotransformation of Teadenol A from Solid State Fermentation of Pu-erh Tea and In Vitro Antioxidant Activity. APPLIED SCIENCES-BASEL 2016. [DOI: 10.3390/app6060161] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Yari Z, Rahimlou M, Poustchi H, Hekmatdoost A. Flaxseed Supplementation in Metabolic Syndrome Management: A Pilot Randomized, Open-labeled, Controlled Study. Phytother Res 2016; 30:1339-44. [DOI: 10.1002/ptr.5635] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 03/31/2016] [Accepted: 04/11/2016] [Indexed: 12/14/2022]
Affiliation(s)
- Zahra Yari
- Department of Clinical Nutrition and Dietetics, Faculty of Nutrition and Food Technology, National Nutrition and Food Technology Research Institute; Shahid Beheshti University of Medical Sciences; Tehran Iran
| | - Mehran Rahimlou
- Department of Clinical Nutrition, School of Nutrition & Dietetics; Tehran University of Medical Sciences; Tehran Iran
| | - Hossein Poustchi
- Liver & Hepatobiliary Diseases Research Center, Digestive Diseases Research Institute, Shariati Hospital; Tehran University of Medical Sciences; Tehran Iran
| | - Azita Hekmatdoost
- Department of Clinical Nutrition and Dietetics, Faculty of Nutrition and Food Technology, National Nutrition and Food Technology Research Institute; Shahid Beheshti University of Medical Sciences; Tehran Iran
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17
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Yang CS, Zhang J, Zhang L, Huang J, Wang Y. Mechanisms of body weight reduction and metabolic syndrome alleviation by tea. Mol Nutr Food Res 2015; 60:160-74. [PMID: 26577614 DOI: 10.1002/mnfr.201500428] [Citation(s) in RCA: 248] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 09/09/2015] [Accepted: 11/06/2015] [Indexed: 12/13/2022]
Abstract
Tea, a popular beverage made from leaves of the plant Camellia sinensis, has been shown to reduce body weight, alleviate metabolic syndrome, and prevent diabetes and cardiovascular diseases in animal models and humans. Such beneficial effects have generally been observed in most human studies when the level of tea consumption was three to four cups (600-900 mg tea catechins) or more per day. Green tea is more effective than black tea. In spite of numerous studies, the fundamental mechanisms for these actions still remain unclear. From a review of the literature, we propose that the two major mechanisms are: (i) decreasing absorption of lipids and proteins by tea constituents in the intestine, thus reducing calorie intake; and (ii) activating AMP-activated protein kinase by tea polyphenols that are bioavailable in the liver, skeletal muscle, and adipose tissues. The relative importance of these two mechanisms depends on the types of tea and diet consumed by individuals. The activated AMP-activated protein kinase would decrease gluconeogenesis and fatty acid synthesis and increase catabolism, leading to body weight reduction and metabolic syndrome alleviation. Other mechanisms and the health relevance of these beneficial effects of tea consumption remain to be further investigated.
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Affiliation(s)
- Chung S Yang
- Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ, USA.,International Joint Research Laboratory of Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, P. R. China
| | - Jinsong Zhang
- International Joint Research Laboratory of Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, P. R. China.,State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui, P. R. China
| | - Le Zhang
- Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ, USA.,International Joint Research Laboratory of Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, P. R. China
| | - Jinbao Huang
- International Joint Research Laboratory of Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, P. R. China.,State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui, P. R. China
| | - Yijun Wang
- International Joint Research Laboratory of Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, P. R. China.,State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui, P. R. China
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18
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Short-term weight-centric effects of tea or tea extract in patients with metabolic syndrome: a meta-analysis of randomized controlled trials. Nutr Diabetes 2015; 5:e160. [PMID: 26075637 PMCID: PMC4491851 DOI: 10.1038/nutd.2015.10] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Revised: 02/15/2015] [Accepted: 04/08/2015] [Indexed: 01/28/2023] Open
Abstract
To evaluate the weight-centric effect of tea or tea extract in participants with metabolic syndrome (MetS), we performed electronic searches in PubMed, EmBase and the Cochrane Library to identify eligible randomized controlled trials (RCTs) comparing tea or tea extract vs a control group. A direct meta-analysis using random-effects model was conducted to pool the standardized mean difference regarding body mass index (BMI), body weight and waist circumference. Study quality was assessed by using the Jadad scale. Pre-specified subgroup and sensitivity analyses were conducted to explore potential heterogeneity. A total of five RCTs involving 338 adult individuals were included. Given the high heterogeneity observed in the overall pooled analysis, we separated the included subjects into two subgroups. Ingestion of tea or tea extract significantly reduced BMI (subgroup 1: -1.60, 95% confidence interval (CI), -2.05 to -1.14; subgroup 2: -0.40, 95% CI, -0.69 to -0.12) and body weight (subgroup 1: -4.14, 95% CI, -4.85 to -3.43; subgroup 2: -0.35, 95% CI, -0.68 to -0.02). This meta-analysis suggests that tea or tea extract has favorable weight-centric effects in MetS patients. Additional large RCTs specifically designed to evaluate the effect on anthropometric measurements are needed to further confirm these findings.
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