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Huang Y, Chen H, Chen J, Wu Q, Zhang W, Li D, Lu Y, Chen Y. Yellow tea polysaccharides protect against non-alcoholic fatty liver disease via regulation of gut microbiota and bile acid metabolism in mice. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2024; 133:155919. [PMID: 39153277 DOI: 10.1016/j.phymed.2024.155919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 07/02/2024] [Accepted: 07/26/2024] [Indexed: 08/19/2024]
Abstract
BACKGROUND Nonalcoholic fatty liver disease (NAFLD) is a major clinical and global public health issue, with no specific pharmacological treatment available. Currently, there is a lack of approved drugs for the clinical treatment of NAFLD. Large-leaf yellow tea polysaccharides (YTP) is a natural biomacromolecule with excellent prebiotic properties and significant therapeutic effects on multiple metabolic diseases. However, the specific mechanisms by which YTP regulates NAFLD remain unclear. PURPOSE This study aims to explore the prebiotic effects of YTP and the potential mechanisms by which it inhibits hepatic cholesterol accumulation in NAFLD mice. METHODS The effects of YTP on lipid accumulation were evaluated in NAFLD mice through obesity trait analysis and bile acids (BAs) metabolism assessment. Additionally, fecal microbiota transplantation (FMT) was performed, and high-throughput sequencing was employed to investigate the mechanisms underlying YTP's regulatory effects on gut microbiota and BA metabolism. RESULTS Our study demonstrated that YTP altered the constitution of colonic BA, particularly increasing the levels of conjugated BA and non-12OH BA, which suppressed ileum FXR receptors and hepatic BA reabsorption, facilitated BA synthesis, and fecal BA excretion. The modifications were characterized by a decrease in the levels of FXR, FGF15, FGFR4, and ASBT proteins, and an increase in the levels of Cyp7a1 and Cyp27a1 proteins. YTP might affect enterohepatic circulation and by the activated the hepatic FXR-SHP pathway. Meanwhile, YTP reshaped the intestinal microbiome structure by decreasing BSH-producing genera and increasing taurine metabolism genera. The correlation analysis implied that Muribaculaceae, Pseudomonas, acterium_coprostanoligenes_group, Clostridiales, Lachnospiraceae_NK4A136_group, Delftia, Dubosiella, and Romboutsia were strongly correlated with specific BA monomers. CONCLUSIONS YTP modulates bile salt hydrolase-related microbial genera to activate alternative bile acid synthesis pathways, thereby inhibiting NAFLD progression. These results suggest that YTP may serve as a potential probiotic formulation, offering a feasible dietary intervention for NAFLD.
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Affiliation(s)
- Yuzhe Huang
- School of Life Sciences, Anhui University, Hefei, Anhui 230601, PR China; Department of Pharmacy, Anhui University of Chinese Medicine, Hefei, Anhui 230012, PR China; Institute of Pharmaceutics, Anhui Academy of Chinese Medicine, Hefei, Anhui 230012, PR China; Key Laboratory for Ecological Engineering and Biotechnology of Anhui Province, Hefei 230601, PR China
| | - Hao Chen
- School of Life Sciences, Anhui University, Hefei, Anhui 230601, PR China; Key Laboratory for Ecological Engineering and Biotechnology of Anhui Province, Hefei 230601, PR China
| | - Jielin Chen
- School of Life Sciences, Anhui University, Hefei, Anhui 230601, PR China; Key Laboratory for Ecological Engineering and Biotechnology of Anhui Province, Hefei 230601, PR China
| | - Qingxi Wu
- School of Life Sciences, Anhui University, Hefei, Anhui 230601, PR China; Key Laboratory for Ecological Engineering and Biotechnology of Anhui Province, Hefei 230601, PR China
| | - Wenna Zhang
- School of Life Sciences, Anhui University, Hefei, Anhui 230601, PR China; Key Laboratory for Ecological Engineering and Biotechnology of Anhui Province, Hefei 230601, PR China
| | - Daxiang Li
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, Anhui 230036, PR China
| | - Yongming Lu
- School of Life Sciences, Anhui University, Hefei, Anhui 230601, PR China; Key Laboratory for Ecological Engineering and Biotechnology of Anhui Province, Hefei 230601, PR China
| | - Yan Chen
- School of Life Sciences, Anhui University, Hefei, Anhui 230601, PR China; Key Laboratory for Ecological Engineering and Biotechnology of Anhui Province, Hefei 230601, PR China.
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Xing D, Zheng T, Chen X, Xie Z. Yellow Teas Protect against DSS-Induced Ulcerative Colitis by Inhibiting TLR4/NF-κB/NLRP3 Inflammasome in Mice. Foods 2024; 13:2843. [PMID: 39272608 PMCID: PMC11395497 DOI: 10.3390/foods13172843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2024] [Revised: 08/28/2024] [Accepted: 09/06/2024] [Indexed: 09/15/2024] Open
Abstract
Yellow tea (YT), a slightly fermented tea with a unique yellowing process and mellow taste, is becoming widely popular. Currently, the YT includes bud yellow tea (BYT), small-leaf yellow tea (SYT), and large-leaf yellow tea (LYT) based on maturity of raw materials. Previous studies have shown that YT has outstanding potential in preventing metabolic syndrome. However, the distinct effects and mechanisms of different types of YT on ulcerative colitis (UC) are still unclear. This study investigated the effects and mechanisms of continuous or intermittent intervention of three yellow tea water extracts (YTEs) on dextran sulfate sodium (DSS)-induced ulcerative colitis in CD-1 mice. The results showed that YTE intervention significantly improves the syndrome of DSS-induced UC in mice. Mechanistic studies reveal that YTEs increase the expression levels of tight junction (TJ) proteins and reduce the levels of pro-inflammatory cytokines in the colon by inactivating TLR4/NF-κB/NLRP3. YTE treatment protected intestinal barrier integrity and reduced serum lipopolysaccharide (LPS) levels. Interestingly, our results indicate that large-leaf yellow tea (LYT) has a better alleviating effect than BYT and SYT. YTE intervention before DSS administration has a certain degree of preventive effect on ulcerative colitis, while continuous YTE intervention after DSS induction has a significant reversing effect on the damage caused by DSS. Our results indicated that drinking YT may have preventive and therapeutic effect on UC, especially drinking LYT.
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Affiliation(s)
- Dawei Xing
- Chaohu Regional Collaborative Technology Service Center for Rural Revitalization, School of Biological and Environmental Engineering, Chaohu University, 1 Bantang Road, Hefei 238024, China
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, 130 Changjiang West Road, Hefei 230036, China
| | - Tao Zheng
- Chaohu Regional Collaborative Technology Service Center for Rural Revitalization, School of Biological and Environmental Engineering, Chaohu University, 1 Bantang Road, Hefei 238024, China
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, 130 Changjiang West Road, Hefei 230036, China
| | - Xiaoju Chen
- Chaohu Regional Collaborative Technology Service Center for Rural Revitalization, School of Biological and Environmental Engineering, Chaohu University, 1 Bantang Road, Hefei 238024, China
| | - Zhongwen Xie
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, 130 Changjiang West Road, Hefei 230036, China
- Joint Research Center for Food Nutrition and Health of IHM, Anhui Agricultural University, 130 Changjiang West Road, Hefei 230036, China
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Xiao X, Ge H, Wang Y, Wan X, Li D, Xie Z. (-)-Gallocatechin Gallate Mitigates Metabolic Syndrome-Associated Diabetic Nephropathy in db/db Mice. Foods 2024; 13:1755. [PMID: 38890983 PMCID: PMC11171689 DOI: 10.3390/foods13111755] [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: 04/11/2024] [Revised: 05/19/2024] [Accepted: 05/29/2024] [Indexed: 06/20/2024] Open
Abstract
Metabolic syndrome (MetS) significantly predisposes individuals to diabetes and is a prognostic factor for the progression of diabetic nephropathy (DN). This study aimed to evaluate the efficacy of (-)-gallocatechin gallate (GCG) in alleviating signs of MetS-associated DN in db/db mice. We administered GCG and monitored its effects on several metabolic parameters, including food and water intake, urinary output, blood glucose levels, glucose and insulin homeostasis, lipid profiles, blood pressure, and renal function biomarkers. The main findings indicated that GCG intervention led to marked improvements in these metabolic indicators and renal function, signifying its potential in managing MetS and DN. Furthermore, transcriptome analysis revealed substantial modifications in gene expression, notably the downregulation of pro-inflammatory genes such as S100a8, S100a9, Cd44, Socs3, Mmp3, Mmp9, Nlrp3, IL-1β, Osm, Ptgs2, and Lcn2 and the upregulation of the anti-oxidative gene Gstm3. These genetic alterations suggest significant effects on pathways related to inflammation and oxidative stress. In conclusion, GCG demonstrates therapeutic efficacy for MetS-associated DN, mitigating metabolic disturbances and enhancing renal health by modulating inflammatory and oxidative responses.
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Affiliation(s)
- Xin Xiao
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, 130 Changjiang West Road, Hefei 230036, China; (X.X.); (H.G.); (Y.W.); (X.W.); (D.L.)
- Joint Research Center for Food Nutrition and Health of IHM, Hefei 230036, China
| | - Huifang Ge
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, 130 Changjiang West Road, Hefei 230036, China; (X.X.); (H.G.); (Y.W.); (X.W.); (D.L.)
- Joint Research Center for Food Nutrition and Health of IHM, Hefei 230036, China
| | - Yijun Wang
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, 130 Changjiang West Road, Hefei 230036, China; (X.X.); (H.G.); (Y.W.); (X.W.); (D.L.)
- Joint Research Center for Food Nutrition and Health of IHM, Hefei 230036, China
| | - Xiaochun Wan
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, 130 Changjiang West Road, Hefei 230036, China; (X.X.); (H.G.); (Y.W.); (X.W.); (D.L.)
- Joint Research Center for Food Nutrition and Health of IHM, Hefei 230036, China
| | - Daxiang Li
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, 130 Changjiang West Road, Hefei 230036, China; (X.X.); (H.G.); (Y.W.); (X.W.); (D.L.)
- Joint Research Center for Food Nutrition and Health of IHM, Hefei 230036, China
| | - Zhongwen Xie
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, 130 Changjiang West Road, Hefei 230036, China; (X.X.); (H.G.); (Y.W.); (X.W.); (D.L.)
- Joint Research Center for Food Nutrition and Health of IHM, Hefei 230036, China
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Zhang G, Zhong Y, Zhang X, Wang Y, Sun Y, Li X, Liu Z, Liang J. Flavor Characteristics, Antioxidant Activity and In Vitro Digestion Properties of Bread with Large-Leaf Yellow Tea Powder. Foods 2024; 13:715. [PMID: 38472828 DOI: 10.3390/foods13050715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 02/07/2024] [Accepted: 02/08/2024] [Indexed: 03/14/2024] Open
Abstract
Foods containing tea could be widely utilized due to the addition of good tea ingredients, especially large-leaf yellow tea, which is rich with a good flavor. Applying this change to bread containing tea would improve its product quality. In this research, large-leaf yellow tea bread (LYB), possessing a special flavor, was developed using ultrafine large-leaf yellow tea powder and flour as the main raw materials. The amount of ultrafine large-leaf yellow tea powder added to bread was optimized using texture, sensation, and specific volume as comprehensive evaluation indicators. At the optimal dosage, the free amino acids, volatile flavor compounds, antioxidant activity, and in vitro starch digestibility of LYB were measured. Response surface optimization experimental results showed that the comprehensive score of bread was highest when the added amount of ultrafine large-leaf yellow tea powder was 3%. In particular, compared to blank bread (BB), adding ultrafine large-leaf yellow tea powder into bread could effectively increase its amino acid composition, enhance its volatile flavor compounds, improve the antioxidant capacity, and reduce the digestibility of starch.
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Affiliation(s)
- Gexing Zhang
- State Key Laboratory of Tea Plant Biology and Utilization/International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Key Laboratory of Jianghuai Agricultural Product Fine Processing and Resource Utilization, Ministry of Agriculture and Rural Affairs, Anhui Engineering Research Center for High Value Utilization of Characteristic Agricultural Products, College of Tea & Food Science and Technology, Anhui Agricultural University, Hefei 230036, China
| | - Yang Zhong
- State Key Laboratory of Tea Plant Biology and Utilization/International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Key Laboratory of Jianghuai Agricultural Product Fine Processing and Resource Utilization, Ministry of Agriculture and Rural Affairs, Anhui Engineering Research Center for High Value Utilization of Characteristic Agricultural Products, College of Tea & Food Science and Technology, Anhui Agricultural University, Hefei 230036, China
| | - Xinzhen Zhang
- State Key Laboratory of Tea Plant Biology and Utilization/International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Key Laboratory of Jianghuai Agricultural Product Fine Processing and Resource Utilization, Ministry of Agriculture and Rural Affairs, Anhui Engineering Research Center for High Value Utilization of Characteristic Agricultural Products, College of Tea & Food Science and Technology, Anhui Agricultural University, Hefei 230036, China
| | - Yuqi Wang
- State Key Laboratory of Tea Plant Biology and Utilization/International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Key Laboratory of Jianghuai Agricultural Product Fine Processing and Resource Utilization, Ministry of Agriculture and Rural Affairs, Anhui Engineering Research Center for High Value Utilization of Characteristic Agricultural Products, College of Tea & Food Science and Technology, Anhui Agricultural University, Hefei 230036, China
| | - Yue Sun
- State Key Laboratory of Tea Plant Biology and Utilization/International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Key Laboratory of Jianghuai Agricultural Product Fine Processing and Resource Utilization, Ministry of Agriculture and Rural Affairs, Anhui Engineering Research Center for High Value Utilization of Characteristic Agricultural Products, College of Tea & Food Science and Technology, Anhui Agricultural University, Hefei 230036, China
| | - Xueling Li
- State Key Laboratory of Tea Plant Biology and Utilization/International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Key Laboratory of Jianghuai Agricultural Product Fine Processing and Resource Utilization, Ministry of Agriculture and Rural Affairs, Anhui Engineering Research Center for High Value Utilization of Characteristic Agricultural Products, College of Tea & Food Science and Technology, Anhui Agricultural University, Hefei 230036, China
| | - Zhengquan Liu
- State Key Laboratory of Tea Plant Biology and Utilization/International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Key Laboratory of Jianghuai Agricultural Product Fine Processing and Resource Utilization, Ministry of Agriculture and Rural Affairs, Anhui Engineering Research Center for High Value Utilization of Characteristic Agricultural Products, College of Tea & Food Science and Technology, Anhui Agricultural University, Hefei 230036, China
| | - Jin Liang
- State Key Laboratory of Tea Plant Biology and Utilization/International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Key Laboratory of Jianghuai Agricultural Product Fine Processing and Resource Utilization, Ministry of Agriculture and Rural Affairs, Anhui Engineering Research Center for High Value Utilization of Characteristic Agricultural Products, College of Tea & Food Science and Technology, Anhui Agricultural University, Hefei 230036, China
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Wang R, Gu M, Zhang Y, Zhong Q, Chen L, Li D, Xie Z. Long-term drinking of green tea combined with exercise improves hepatic steatosis and obesity in male mice induced by high-fat diet. Food Sci Nutr 2024; 12:776-785. [PMID: 38370081 PMCID: PMC10867457 DOI: 10.1002/fsn3.3773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 09/28/2023] [Accepted: 10/04/2023] [Indexed: 02/20/2024] Open
Abstract
Dietary habits and exercise play an important role in the well-being of human health. Currently, how long of drinking tea combined with exercise could efficiently ameliorate hepatic steatosis and obesity still needs to be investigated. Here, short-term and long-term green tea drinking combined with exercise were studied to improve hepatic steatosis and obesity in high-fat diet-induced (HF) mice. Our results showed that Yunkang 10 green tea (GT) combined with exercise (Ex) exhibited synergistic prevention effects on ameliorating hepatic steatosis and obesity. Especially, 22-week intervention with GT or Ex improved all symptoms of obesity, which indicated that long-term intervention exhibited profound preventive effects than the short term. Moreover, the combined intervention of 22 weeks inhibited the activation of NF-κB pathway and the expression of proinflammatory cytokines, which suggests that tea combined exercise may improve liver steatosis mainly by inhibiting inflammation. The key molecules for regulating lipid and glucose metabolism SCD1 were obviously downregulated, and GLU2 and PPARγ were significantly upregulated by GT and exercise in the liver of high-fat diet-induced mice. This study demonstrated that long-term intervention with GT and exercise effectively relieved hepatic steatosis and obesity complications by ameliorating hepatic inflammation, reducing lipid synthesis, and accelerating glucose transport.
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Affiliation(s)
- Ruru Wang
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and TechnologyAnhui Agricultural UniversityHefeiChina
| | - Mingxing Gu
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and TechnologyAnhui Agricultural UniversityHefeiChina
| | - Yanzhong Zhang
- Department of Sports SciencesAnhui Agricultural UniversityHefeiChina
| | - Qinglin Zhong
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and TechnologyAnhui Agricultural UniversityHefeiChina
| | - Linbo Chen
- Tea Research InstituteYunnan Academy of Agricultural SciencesKunmingChina
| | - Daxiang Li
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and TechnologyAnhui Agricultural UniversityHefeiChina
| | - Zhongwen Xie
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and TechnologyAnhui Agricultural UniversityHefeiChina
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Rathod YD, Abdelgawad R, Hübner CA, Di Fulvio M. Slc12a2 loss in insulin-secreting β-cells links development of overweight and metabolic dysregulation to impaired satiation control of feeding. Am J Physiol Endocrinol Metab 2023; 325:E581-E594. [PMID: 37819196 PMCID: PMC10864024 DOI: 10.1152/ajpendo.00197.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 10/02/2023] [Accepted: 10/02/2023] [Indexed: 10/13/2023]
Abstract
Male mice lacking the Na+-K+-2Cl- cotransporter Slc12a2 (Nkcc1) specifically in insulin-secreting β-cells (Slc12a2βKO) have reduced β-cell mass and mild β-cell secretory dysfunction associated with overweight, glucose intolerance, insulin resistance, and metabolic abnormalities. Here, we confirmed and extended previous results to female Slc12a2βKO mice, which developed a similar metabolic syndrome-like phenotype as males, albeit milder. Notably, male and female Slc12a2βKO mice developed overweight without consuming excess calories. Analysis of the feeding microstructure revealed that young lean Slc12a2βKO male mice ate meals of higher caloric content and at a relatively lower frequency than normal mice, particularly during the night. In addition, overweight Slc12a2βKO mice consumed significantly larger meals than lean mice. Therefore, the reduced satiation control of feeding precedes the onset of overweight and is worsened in older Slc12a2βKO mice. However, the time spent between meals remained intact in lean and overweight Slc12a2βKO mice, indicating conserved satiety responses to ad libitum feeding. Nevertheless, satiety was intensified during and after refeeding only in overweight males. In lean females, satiety responses to refeeding were delayed relative to age- and body weight-matched control mice but normalized in overweight mice. Since meal size did not change during refeeding, these data suggested that the satiety control of eating after fasting is impaired in lean Slc12a2βKO mice before the onset of overweight and independently of their reduced satiation responses. Therefore, our results support the novel hypothesis that reduced satiation precedes the onset of overweight and the development of metabolic dysregulation.NEW & NOTEWORTHY Obesity, defined as excess fat accumulation, increases the absolute risk for metabolic diseases. Although obesity is usually attributed to increased food intake, we demonstrate that body weight gain can be hastened without consuming excess calories. In fact, impaired meal termination control, i.e., satiation, is detectable before the development of overweight in an animal model that develops a metabolic syndrome-like phenotype.
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Affiliation(s)
- Yakshkumar Dilipbhai Rathod
- Department of Pharmacology and Toxicology, School of Medicine Dayton, Wright State University, Ohio, United States
| | - Rana Abdelgawad
- Department of Pharmacology and Toxicology, School of Medicine Dayton, Wright State University, Ohio, United States
| | - Christian A Hübner
- Institut für Humangenetik Am Klinikum 1, Universitätsklinikum Jena, Jena, Germany
| | - Mauricio Di Fulvio
- Department of Pharmacology and Toxicology, School of Medicine Dayton, Wright State University, Ohio, United States
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Tang X, Kan Z, Li N, Huang J, Zhang J, Thompson HJ, Gao F, Shen Y, Zhang L, Xie Z, Wan X, Wang Y. Mechanisms underlying large-leaf yellow tea mediated inhibition of cognitive impairment in the 5xFAD model of Alzheimer's disease. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2023; 120:155030. [PMID: 37651754 DOI: 10.1016/j.phymed.2023.155030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 06/03/2023] [Accepted: 08/15/2023] [Indexed: 09/02/2023]
Abstract
BACKGROUND Alzheimer's disease (AD) is the most common cause of dementia and is characterized by amyloid-β (Aβ) peptides and hyperphosphorylated Tau proteins. Evidence indicates that AD and type 2 diabetes mellitus (T2DM) share pathophysiological characteristics, including impaired insulin sensitivity. Large-leaf yellow tea (LYT) has been widely recognized for its health benefits, and we previously found that LYT can improve peripheral insulin resistance. PURPOSE This study aimed to investigate the protective effects and underlying mechanisms of LYT in the 5xFAD mouse model of AD. METHODS HPLC and spectrophotometric methods determined the chemical composition of the LYT extract. 5xFAD mice were treated with LYT supplementation (2 and 4 mg/ml) in drinking water for six months. Barnes and Y mazes were used to evaluate cognitive function, and the open field test assessed anxiety-like behavior. Immunofluorescence, silver, and Nissl staining were used to evaluate the pathological effects of LYT extract. A FRET-based assay assessed β-site APP cleavage enzyme 1 (BACE1) activity, ELISA measured Aβ levels in the brain, and Western blot analyses explored protein expression levels. RESULTS Our results revealed that LYT significantly attenuated memory impairment and anxiety levels and alleviated cerebral neural damage. A reduction of senile plaques was also observed in both the cortex and hippocampus. LYT significantly inhibited the activity of BACE1, which resulted in a lower Aβ protein level. In addition, LYT enhanced insulin receptor substrate 1 (IRS-1)-mediated phosphorylation of phosphoinositide 3-kinase (PI3K) and protein kinase B (AKT), further suppressed glycogen synthase kinase-3β (GSK3β), and ultimately inhibited hyperphosphorylation of the protein Tau. The inhibitory effect of the LYT extract on the phosphorylation of Tau and BACE1 activity was dose-dependent. CONCLUSION LYT improves cognitive ability and reduces Aβ production by inhibiting BACE1 activity. Decreases of Tau protein hyperphosphorylation upon LYT treatment appear to be associated with the regulation of the IRS-1/PI3K/AKT/GSK3β axis. Thus, the findings of this study also provide new evidence that LYT regulates insulin signaling pathways within the central nervous system.
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Affiliation(s)
- Xiaoyu Tang
- The State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, China
| | - Zhipeng Kan
- Neurodegenerative Disease Research Center, University of Science and Technology of China, Hefei, China
| | - Na Li
- The State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, China
| | - Jinbao Huang
- The State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, China
| | - Jinsong Zhang
- The State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, China
| | - Henry J Thompson
- Cancer Prevention Laboratory, Colorado State University, Fort Collins, CO 80523, United States
| | - Feng Gao
- Neurodegenerative Disease Research Center, University of Science and Technology of China, Hefei, China
| | - Yong Shen
- Neurodegenerative Disease Research Center, University of Science and Technology of China, Hefei, China
| | - Liang Zhang
- The State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, China
| | - Zhongwen Xie
- The State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, China
| | - Xiaochun Wan
- The State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, China.
| | - Yijun Wang
- The State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, China.
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Wang H, Wang L, Cheng H, Ge H, Xie Z, Li D. Large yellow tea polysaccharides ameliorate obesity-associated metabolic syndrome by promoting M2 polarization of adipose tissue macrophages. Food Funct 2023; 14:9337-9349. [PMID: 37782075 DOI: 10.1039/d3fo01691a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
Obesity-induced metabolic syndrome is strongly associated with infiltrated adipose tissue macrophages (ATMs). Large yellow tea, a traditional functional beverage in China, has been shown to possess anti-obesity effects. However, the effect of large yellow tea polysaccharides (LYPs) against obesity-associated metabolic syndrome and their underlying mechanisms remain unclear and must be extensively investigated. In this study, we investigated the ameliorative effect of LYPs on metabolic syndrome using a high-fat diet (HFD)-induced obese mouse model. Our results indicated that LYPs significantly alleviated weight gain, dyslipidemia, glucose intolerance, and insulin resistance. Moreover, LYPs restored the homeostasis of energy metabolism and pancreatic β-cell function. Notably, LYPs promoted M2 polarization of ATMs by regulating the expression of genes and specific cytokines involved in the assembly and secretion of M2 polarization. The improved metabolic syndrome of LYPs might be associated with the modulation of macrophage polarization. These findings suggest that LYPs might be a novel potential therapeutic agent to prevent or treat HFD-induced metabolic disorders by regulating M2 polarization.
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Affiliation(s)
- Hongyan Wang
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, Anhui 230036, People's Republic of China.
| | - Lan Wang
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, Anhui 230036, People's Republic of China.
| | - Huijun Cheng
- College of Life Sciences, Anhui Agricultural University, Hefei, Anhui 230036, People's Republic of China
| | - Huifang Ge
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, Anhui 230036, People's Republic of China.
| | - Zhongwen Xie
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, Anhui 230036, People's Republic of China.
| | - Daxiang Li
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, Anhui 230036, People's Republic of China.
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Chen C, Huang J, Omedi JO, Huang C, Cheng X, Zhang B, Li N, Gao T, Liang L, Zheng J, Zeng Y, Zhou Z, Huang W. Characteristics of the microstructure and the key components of white kidney bean sourdough bread induced by mixed-strain fermentation and its influence on gut microbiota. Food Funct 2023; 14:7413-7425. [PMID: 37475602 DOI: 10.1039/d3fo01547e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/22/2023]
Abstract
In this study, the effect of mixed-strain fermentation using Kluyveromyces marxianus with either Lactobacillus plantarum or Pediococcus pentosaceus on the physiochemical and nutritional properties of white kidney bean flour sourdough was investigated. The results indicated that mixed-strain fermentation reduced the anti-nutritional factors produced from the white kidney bean flour, especially in the sourdough fermented by L. plantarum and K. marxianus (WKS-LK) compared to that by P. pentosaceus and K. marxianus (WKS-JK). Meanwhile, the content of lactic acid and acetic acid and the proportion of peptides with molecular weights ranging from <500 to 5000 Da were increased in the sourdoughs (WKS-LK > WKS-JK). Compared to the control (WK), microstructural characteristics of the dough seemed to be improved in WKS-LK followed by WKS-JK in terms of their corresponding gluten network consistency. Moreover, mixed fermentation led to a reduced starch digestibility accompanied by a higher content of resistant starch and slowly digestible starch. In contrast, protein digestibility was enhanced in WKS-LK and WKS-JK sourdough breads. More importantly, the changes in gut microbiota composition, short-chain fatty acid (SCFA) production, systemic inflammation, glucose tolerance and liver tissue histopathology following 21-day consumption of the sourdough bread were also evaluated via an animal model. The intake of sourdough breads reduced the abundance of the pathogenic microbiota Escherichia shigella. In contrast, the corresponding abundance of Rikenellaceae, Akkermansiaceae, Erysipelotrichaceae, Prevotellaceae and Eubacterium coprostanoligenes was increased, followed by enhanced SCFA generation, with the highest in WKS-LK and then WKS-JK. Meanwhile, a reduced level of pro-inflammatory cytokines IL-1β, IL-6 and TNF-α in the serum and improved glucose tolerance and liver tissue histopathology following the bread consumption were also achieved in the order of WKS-LK, then WKS-JK mice compared to WK.
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Affiliation(s)
- Cheng Chen
- State Key Laboratory of Food Science and Technology, Laboratory of Baking and Fermentation Science, Cereals/Sourdough and Nutritional Functionality Research, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
| | - Jing Huang
- State Key Laboratory of Food Science and Technology, Laboratory of Baking and Fermentation Science, Cereals/Sourdough and Nutritional Functionality Research, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
| | - Jacob Ojobi Omedi
- State Key Laboratory of Food Science and Technology, Laboratory of Baking and Fermentation Science, Cereals/Sourdough and Nutritional Functionality Research, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
| | - Chengye Huang
- State Key Laboratory of Food Science and Technology, Laboratory of Baking and Fermentation Science, Cereals/Sourdough and Nutritional Functionality Research, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
| | - Xin Cheng
- State Key Laboratory of Food Science and Technology, Laboratory of Baking and Fermentation Science, Cereals/Sourdough and Nutritional Functionality Research, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
| | - Binle Zhang
- State Key Laboratory of Food Science and Technology, Laboratory of Baking and Fermentation Science, Cereals/Sourdough and Nutritional Functionality Research, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
| | - Ning Li
- Guangzhou Puratos Food Co. Ltd, Guangzhou 511400, China
| | - Tiecheng Gao
- Guangzhou Puratos Food Co. Ltd, Guangzhou 511400, China
| | - Li Liang
- State Key Laboratory of Food Science and Technology, Laboratory of Baking and Fermentation Science, Cereals/Sourdough and Nutritional Functionality Research, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
| | - Jianxian Zheng
- College of Food and Bioengineering, South China University of Technology, and Guangzhou Institute of Food Industry, Guangzhou, Guangdong 510000, China
| | - Yongqing Zeng
- College of Food and Bioengineering, South China University of Technology, and Guangzhou Institute of Food Industry, Guangzhou, Guangdong 510000, China
| | - Zhongkai Zhou
- College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Weining Huang
- State Key Laboratory of Food Science and Technology, Laboratory of Baking and Fermentation Science, Cereals/Sourdough and Nutritional Functionality Research, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
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10
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Wu G, Cheng H, Guo H, Li Z, Li D, Xie Z. Tea polyphenol EGCG ameliorates obesity-related complications by regulating lipidomic pathway in leptin receptor knockout rats. J Nutr Biochem 2023; 118:109349. [PMID: 37085056 DOI: 10.1016/j.jnutbio.2023.109349] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Revised: 03/20/2023] [Accepted: 04/04/2023] [Indexed: 04/23/2023]
Abstract
Tea polyphenol EGCG has been widely recognized for antiobesity effects. However, the molecular mechanism of lipidomic pathway related to lipid-lowering effect of EGCG is still not well understood. The aim of this study was to investigate the effects and mechanism of EGCG activated hepatic lipidomic pathways on ameliorating obesity-related complications by using newly developed leptin receptor knockout (Lepr KO) rats. Results showed that EGCG supplementation (100 mg/kg body weight) significantly decreased total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C) and triglyceride (TG) levels both in the serum and liver, and significantly improved glucose intolerance. In addition, EGCG alleviated fatty liver development and restored the normal liver function in Lepr KO rats. Liver lipidomic analysis revealed that EGCG dramatically changes overall composition of lipid classes. Notably, EGCG significantly decreased an array of triglycerides (TGs) and diglycerides (DGs) levels. While EGCG increased 31 glycerophospholipid species and 1 sphingolipid species levels, such as phosphatidylcholines (PCs), phosphatidylethanolamines (PEs), phosphatidylserines (PSs) and phosphatidylinositols (PIs) levels in the liver of Lepr KO rats. Moreover, 14 diversely regulated lipid species were identified as potential lipid biomarkers. Mechanistic analysis revealed that EGCG significantly activated the SIRT6/AMPK/SREBP1/FAS pathway to decrease DGs and TGs levels and upregulated glycerophospholipids synthesis pathways to increase glycerophospholipid level in the liver of Lepr KO rats. These findings suggested that the regulation of glycerolipids and glycerophospholipid homeostasis might be the key pathways for EGCG in ameliorating obesity-related complications in Lepr KO rats.
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Affiliation(s)
- Guohuo Wu
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences & Technology, Anhui Agricultural University, Hefei, Anhui 230036, PR China
| | - Huijun Cheng
- College of Life Sciences, Anhui Agricultural University, Hefei, Anhui 230036, PR China
| | - Huimin Guo
- Center for Biotechnology, Anhui Agricultural University, Anhui 230036, PR China
| | - Zhuang Li
- Center for Biotechnology, Anhui Agricultural University, Anhui 230036, PR China
| | - Daxiang Li
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences & Technology, Anhui Agricultural University, Hefei, Anhui 230036, PR China.
| | - Zhongwen Xie
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences & Technology, Anhui Agricultural University, Hefei, Anhui 230036, PR China; College of Life Sciences, Anhui Agricultural University, Hefei, Anhui 230036, PR China.
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11
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Feng X, Yang S, Pan Y, Zhou S, Ma S, Ou C, Fan F, Gong S, Chen P, Chu Q. Yellow tea: more than turning green leaves to yellow. Crit Rev Food Sci Nutr 2023; 64:7836-7853. [PMID: 37009836 DOI: 10.1080/10408398.2023.2193271] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
Abstract
Yellow tea (YT), a slightly-fermented tea originated from Ming Dynasty with distinctive "Three yellows," mild-sweet smell, and mellow taste attributed to the unique yellowing process. Based on current literature and our previous work, we aim to comprehensively illustrate the key processing procedures, characteristic chemical compounds, health benefits and applications, as well as the interlocking relationships among them. Yellowing is the most vital procedure anchored on the organoleptic quality, characteristic chemical components, and bioactivities of YT, which is influenced by temperature, moisture content, duration, and ventilation conditions. Pheophorbides, carotenoids, thearubigins and theabrownins are the major pigments contributing to the "three yellows" appearance. Alcohols, such as terpinol and nerol, are attributed to the refreshing and sweet aroma of bud and small-leaf YT, while heterocyclics and aromatics forming during roasting result in the crispy rice-like large-leaf YT. Hygrothermal effects and enzymatic reactions during yellowing result in the decline of astringent substances. Meanwhile, multiple bioactive compounds such as catechins, ellagitannins, and vitexin, endow YT with antioxidant, anti-metabolic syndrome, anti-cancer, gut microbiota regulation, and organ injury protection effects. Future studies focusing on the standard yellowing process technology, quality evaluation system, and functional factors and mechanisms, possible orientations, and perspectives are guaranteed.
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Affiliation(s)
- Xinyu Feng
- Tea Research Institute, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, P. R. China
- Department of Food Science and Nutrition, Zhejiang University, Hangzhou, P. R. China
| | - Shiyan Yang
- Tea Research Institute, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, P. R. China
| | - Yani Pan
- Tea Research Institute, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, P. R. China
| | - Su Zhou
- Tea Research Institute, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, P. R. China
- Department of Food Science and Nutrition, Zhejiang University, Hangzhou, P. R. China
| | - Shicheng Ma
- Wuzhou Liubao Tea Research Association, Wuzhou, P. R. China
| | - Cansong Ou
- Wuzhou Tea Industry Development Service Center, Wuzhou, P. R. China
| | - Fangyuan Fan
- Tea Research Institute, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, P. R. China
| | - Shuying Gong
- Tea Research Institute, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, P. R. China
| | - Ping Chen
- Tea Research Institute, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, P. R. China
| | - Qiang Chu
- Tea Research Institute, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, P. R. China
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12
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Aroma formation and transformation during sealed yellowing process of Pingyang yellow tea. Food Res Int 2023; 165:112535. [PMID: 36869535 DOI: 10.1016/j.foodres.2023.112535] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 01/16/2023] [Accepted: 01/21/2023] [Indexed: 01/28/2023]
Abstract
Yellow tea, a unique type of tea in China which is characterized with yellow color, has gained increasing popularity due to its pleasant taste. However, transformation of aroma compounds during sealed yellowing has been poorly understood. Results of sensory evaluation exhibited that yellowing time was the key factor for flavor and fragrance formation. A total of 52 volatile components during sealed yellowing process of Pingyang yellow soup were further collected and analyzed. The results demonstrated that the sealed yellowing process significantly increased the ratio of alcohol and aldehyde compounds in the aroma volatiles of yellow tea, which were primarily composed of geraniol, linalool, phenylacetaldehyde, linalool oxide and cis-3-hexenol, and their proportion increased with the prolongation of sealed yellowing. Mechanistic speculation revealed that the sealed yellowing process promoted release of alcoholic aroma compounds from their glycoside precursors and enhanced Strecker and oxidative degradation. This study revealed the transformation mechanism of aroma profile during the sealed yellowing process, which would facilitate processing of yellow tea.
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13
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Jack BU, Ramharack P, Malherbe C, Gabuza K, Joubert E, Pheiffer C. Cyclopia intermedia (Honeybush) Induces Uncoupling Protein 1 and Peroxisome Proliferator-Activated Receptor Alpha Expression in Obese Diabetic Female db/db Mice. Int J Mol Sci 2023; 24:ijms24043868. [PMID: 36835279 PMCID: PMC9964215 DOI: 10.3390/ijms24043868] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 02/02/2023] [Accepted: 02/06/2023] [Indexed: 02/17/2023] Open
Abstract
Previously, we reported that a crude polyphenol-enriched fraction of Cyclopia intermedia (CPEF), a plant consumed as the herbal tea, commonly known as honeybush, reduced lipid content in 3T3-L1 adipocytes and inhibited body weight gain in obese, diabetic female leptin receptor-deficient (db/db) mice. In the current study, the mechanisms underlying decreased body weight gain in db/db mice were further elucidated using western blot analysis and in silico approaches. CPEF induced uncoupling protein 1 (UCP1, 3.4-fold, p < 0.05) and peroxisome proliferator-activated receptor alpha (PPARα, 2.6-fold, p < 0.05) expression in brown adipose tissue. In the liver, CPEF induced PPARα expression (2.2-fold, p < 0.05), which was accompanied by a 31.9% decrease in fat droplets in Hematoxylin and Eosin (H&E)-stained liver sections (p < 0.001). Molecular docking analysis revealed that the CPEF compounds, hesperidin and neoponcirin, had the highest binding affinities for UCP1 and PPARα, respectively. This was validated with stabilising intermolecular interactions within the active sites of UCP1 and PPARα when complexed with these compounds. This study suggests that CPEF may exert its anti-obesity effects by promoting thermogenesis and fatty acid oxidation via inducing UCP1 and PPARα expression, and that hesperidin and neoponcirin may be responsible for these effects. Findings from this study could pave the way for designing target-specific anti-obesity therapeutics from C. intermedia.
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Affiliation(s)
- Babalwa Unice Jack
- Biomedical Research and Innovation Platform, South African Medical Research Council, Cape Town 7505, South Africa
- Correspondence: ; Tel.: +27-219-380336
| | - Pritika Ramharack
- Biomedical Research and Innovation Platform, South African Medical Research Council, Cape Town 7505, South Africa
- Pharmaceutical Sciences, School of Health Sciences, University of KwaZulu-Natal, Westville Campus, Durban 4001, South Africa
| | - Christiaan Malherbe
- Plant Bioactives Group, Post-Harvest and Agro-Processing Technologies, Agricultural Research Council (ARC), Infruitec-Nietvoorbij, Stellenbosch 7599, South Africa
| | - Kwazi Gabuza
- Biomedical Research and Innovation Platform, South African Medical Research Council, Cape Town 7505, South Africa
| | - Elizabeth Joubert
- Plant Bioactives Group, Post-Harvest and Agro-Processing Technologies, Agricultural Research Council (ARC), Infruitec-Nietvoorbij, Stellenbosch 7599, South Africa
- Department of Food Science, University of Stellenbosch, Stellenbosch 7602, South Africa
| | - Carmen Pheiffer
- Biomedical Research and Innovation Platform, South African Medical Research Council, Cape Town 7505, South Africa
- Centre for Cardio-Metabolic Research in Africa (CARMA), Division of Medical Physiology, Faculty of Medicine and Health Sciences, University of Stellenbosch, Cape Town 7505, South Africa
- Department of Obstetrics and Gynaecology, Faculty of Health Sciences, University of Pretoria, Pretoria 0001, South Africa
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14
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Atia T, Sakr HI, Damanhory AA, Moawad K, Alsawy M. The protective effect of green tea on diabetes-induced hepato-renal pathological changes: a histological and biochemical study. Arch Physiol Biochem 2023; 129:168-179. [PMID: 32816576 DOI: 10.1080/13813455.2020.1806885] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We investigated the protective effect of green tea on diabetic hepato-renal complications. Thirty male Wistar rats were randomly divided into five equal groups: normal control, diabetic control, glibenclamide-treated, green tea-treated, and combined therapy-treated groups; ethical approval number "BERC-014-01-20." After eight weeks, animals were sacrificed by CO2 euthanasia method, liver and kidney tissues were processed and stained for pathological changes, and blood samples were collected for biochemical analysis. Diabetic rats showed multiple hepato-renal morphological and apoptotic changes associated with significantly increased some biochemical parameters, while serum albumin and HDL decreased significantly compared to normal control (p < .05). Monotherapy can induce significant improvements in pathological and biochemical changes but has not been able to achieve normal patterns. In conclusion, green tea alone has a poor hypoglycaemic effect but can reduce diabetic complications, whereas glibenclamide cannot prevent diabetic complications. The addition of green tea to oral hypoglycaemic therapy has shown a potent synergistic effect.
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Affiliation(s)
- Tarek Atia
- Department of Medical Laboratory Sciences, College of Applied Medical Sciences Prince, Sattam Bin Abdulaziz University, Al-Kharj, KSA
- Department of Histology and Cytology, Faculty of Medicine, Al-Azhar University, Cairo, Egypt
| | - Hader I Sakr
- Department of Medical Physiology, Faculty of Medicine, Cairo University, Cairo, Egypt
- Batterjee Medical College, Jeddah, KSA
| | - Ahmed A Damanhory
- Batterjee Medical College, Jeddah, KSA
- Department of Biochemistry, Faculty of Medicine, Al-Azhar University, Cairo, Egypt
| | - Karim Moawad
- School of Biological Science, UCI, Irvine, CA, USA
| | - Moustfa Alsawy
- Department of Histology and Cytology, Faculty of Medicine, Al-Azhar University, Cairo, Egypt
- Batterjee Medical College, Jeddah, KSA
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15
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Ouyang J, Peng Y, Gong Y. New Perspectives on Sleep Regulation by Tea: Harmonizing Pathological Sleep and Energy Balance under Stress. Foods 2022; 11:3930. [PMID: 36496738 PMCID: PMC9738644 DOI: 10.3390/foods11233930] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 11/25/2022] [Accepted: 11/26/2022] [Indexed: 12/09/2022] Open
Abstract
Sleep, a conservative evolutionary behavior of organisms to adapt to changes in the external environment, is divided into natural sleep, in a healthy state, and sickness sleep, which occurs in stressful environments or during illness. Sickness sleep plays an important role in maintaining energy homeostasis under an injury and promoting physical recovery. Tea, a popular phytochemical-rich beverage, has multiple health benefits, including lowering stress and regulating energy metabolism and natural sleep. However, the role of tea in regulating sickness sleep has received little attention. The mechanism underlying tea regulation of sickness sleep and its association with the maintenance of energy homeostasis in injured organisms remains to be elucidated. This review examines the current research on the effect of tea on sleep regulation, focusing on the function of tea in modulating energy homeostasis through sickness sleep, energy metabolism, and damage repair in model organisms. The potential mechanisms underlying tea in regulating sickness sleep are further suggested. Based on the biohomology of sleep regulation, this review provides novel insights into the role of tea in sleep regulation and a new perspective on the potential role of tea in restoring homeostasis from diseases.
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Affiliation(s)
- Jin Ouyang
- Key Laboratory of Tea Science of Ministry of Education, Changsha 410128, China
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Changsha 410128, China
- Key Laboratory for Evaluation and Utilization of Gene Resources of Horticultural Crops, Ministry of Agriculture and Rural Affairs of China, Hunan Agricultural University, Changsha 410128, China
| | - Yuxuan Peng
- Key Laboratory of Tea Science of Ministry of Education, Changsha 410128, China
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Changsha 410128, China
- Key Laboratory for Evaluation and Utilization of Gene Resources of Horticultural Crops, Ministry of Agriculture and Rural Affairs of China, Hunan Agricultural University, Changsha 410128, China
- College of Physical Education, Hunan City University, Yiyang 413002, China
| | - Yushun Gong
- Key Laboratory of Tea Science of Ministry of Education, Changsha 410128, China
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Changsha 410128, China
- Key Laboratory for Evaluation and Utilization of Gene Resources of Horticultural Crops, Ministry of Agriculture and Rural Affairs of China, Hunan Agricultural University, Changsha 410128, China
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16
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Wang Z, Li Y, Qian C, Feng B, Xiong G, Jiang J, Chen Q. Processing quality and aroma characteristics of fresh noodles intermingled with large-leaf yellow tea powder. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.114391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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17
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Six types of tea extracts attenuated high-fat diet-induced metabolic syndrome via modulating gut microbiota in rats. Food Res Int 2022; 161:111788. [DOI: 10.1016/j.foodres.2022.111788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 07/03/2022] [Accepted: 08/18/2022] [Indexed: 11/24/2022]
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18
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Duyun compound green tea extracts regulate bile acid metabolism on mice induced by high-fat diet. Br J Nutr 2022:1-9. [DOI: 10.1017/s0007114522003166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Abstract
Duyun compound green tea (DCGT) is a healthy beverage with lipid-lowering effect commonly consumed by local people, but its mechanism is not very clear. We evaluated the effect of DCGT treatment on bile acids (BA) metabolism of mice with high-fat diet (HFD) – induced hyperlipidaemia by biochemical indexes and metabolomics and preliminarily determined the potential biomarkers and metabolic pathways of hyperlipidaemia mice treated with DCGT as well as investigated its lipid-lowering mechanism. The results showed that DCGT treatment could reduce HFD – induced gain in weight and improve dyslipidaemia. In addition, a total of ten types of BA were detected, of which seven changed BA metabolites were observed in HFD group mice. After DCGT treatment, glycocholic acid, tauroursodeoxycholic acid and taurochenodeoxycholic acid were significantly down-regulated, while hyodeoxycholic acid, deoxycholic acid and chenodeoxycholic acid were markedly up-regulated. These results demonstrated that DCGT treatment was able to make the BA metabolites in the liver of hyperlipidaemia mice normal and alleviate hyperlipidaemia by regulating the metabolites such as glycocholic acid, tauroursodeoxycholic acid and taurochenodeoxycholic, as well as the BA metabolic pathway and cholesterol metabolic pathway involved.
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Wang H, Xu S, Li D, Xie Z. Structural Characterization and Macrophage Polarization-Modulating Activity of a Novel Polysaccharide from Large Yellow Tea. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:12565-12576. [PMID: 36154025 DOI: 10.1021/acs.jafc.2c05593] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
A novel homogeneous polysaccharide (LYP-S3) that promotes the M2 polarization of macrophages was obtained from large yellow tea by a bioactivity-guided sequential isolation procedure and activity evaluation in the present study. Structural characterization revealed that LYP-S3 has an average molecular weight of 28.6 kDa and is composed of rhamnose, arabinose, galactose, glucose, and galacturonic acid at the molar ratio of 8.08:11.66:11.77:3.96:58.02. The main backbone of LYP-S3 consists of →4)-α-d-GalpA-6-OMe-(1→, β-d-GalpA-(1→, →4)-β-d-Galp-(→1, and →β-d-Galp-(1→, and the branches are composed of α-l-Araf-(→1, →5)-α-l-Araf-(1→, →2,4)-β-l-Rhap-(1→, →2)-β-l-Rhap-(1→, and →4)-β-d-Glcp-(1→. An in vitro bioactivity evaluation assay showed that LYP-S3 remarkably reduced the expression of M1 macrophage markers and increased the expression of M2 macrophage markers. In addition, LYP-S3 inhibited adipocyte differentiation and adipogenesis in 3T3-L1 adipocytes and blocked macrophage migration toward 3T3-L1 adipocytes in the cocultures of bone-marrow-derived monocytes and 3T3-L1 adipocytes. Furthermore, LYP-S3 promoted the M2 polarization of macrophages in cocultures. These findings suggested that LYP-S3 has a potential function in preventing inflammation and obesity.
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Affiliation(s)
- Hongyan Wang
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Shan Xu
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Daxiang Li
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Zhongwen Xie
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei, Anhui 230036, China
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Huangshan Maofeng Green Tea Extracts Prevent Obesity-Associated Metabolic Disorders by Maintaining Homeostasis of Gut Microbiota and Hepatic Lipid Classes in Leptin Receptor Knockout Rats. Foods 2022; 11:foods11192939. [PMID: 36230016 PMCID: PMC9562686 DOI: 10.3390/foods11192939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/30/2022] [Accepted: 09/09/2022] [Indexed: 12/03/2022] Open
Abstract
Huangshan Maofeng green tea (HMGT) is one of the most well-known green teas consumed for a thousand years in China. Research has demonstrated that consumption of green tea effectively improves metabolic disorders. However, the underlying mechanisms of obesity prevention are still not well understood. This study investigated the preventive effect and mechanism of long-term intervention of Huangshan Maofeng green tea water extract (HTE) on obesity-associated metabolic disorders in leptin receptor knockout (Lepr−/−) rats by using gut microbiota and hepatic lipidomics data. The Lepr−/− rats were administered with 700 mg/kg HTE for 24 weeks. Our results showed that HTE supplementation remarkably reduced excessive fat accumulation, as well as ameliorated hyperlipidemia and hepatic steatosis in Lepr−/− rats. In addition, HTE increased gut microbiota diversity and restored the relative abundance of the microbiota responsible for producing short chain fatty acids, including Ruminococcaceae, Faecalibaculum, Veillonellaceae, etc. Hepatic lipidomics analysis found that HTE significantly recovered glycerolipid and glycerophospholipid classes in the liver of Lepr−/− rats. Furthermore, nineteen lipid species, mainly from phosphatidylcholines (PCs), phosphatidylethanolamines (PEs), and triglycerides (TGs), were significantly restored increases, while nine lipid species from TGs and diglycerides (DGs) were remarkably recovered decreases by HTE in the liver of Lepr−/− rats. Our results indicated that prevention of obesity complication by HTE may be possible through maintaining homeostasis of gut microbiota and certain hepatic lipid classes.
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Li M, Luo X, Ho CT, Li D, Guo H, Xie Z. A new strategy for grading of Lu’an guapian green tea by combination of differentiated metabolites and hypoglycaemia effect. Food Res Int 2022; 159:111639. [DOI: 10.1016/j.foodres.2022.111639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 06/30/2022] [Accepted: 07/05/2022] [Indexed: 12/08/2022]
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Large Yellow Tea Extract Ameliorates Metabolic Syndrome by Suppressing Lipogenesis through SIRT6/SREBP1 Pathway and Modulating Microbiota in Leptin Receptor Knockout Rats. Foods 2022; 11:foods11111638. [PMID: 35681388 PMCID: PMC9180543 DOI: 10.3390/foods11111638] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 05/30/2022] [Accepted: 05/30/2022] [Indexed: 12/12/2022] Open
Abstract
Metabolic syndrome is a chronic metabolic disorder that has turned into a severe health problem worldwide. A previous study reported that large yellow tea exhibited better anti-diabetic and lipid-lowering effects than green tea. Nevertheless, the potential mechanisms are not yet understood. In this study, we examined the prevention effects and mechanisms of large yellow tea water extract (LWE) on metabolic syndrome using leptin receptor knockout (Lepr−/−) rats. Seven-week-old male Lepr−/− and wild type (WT) littermate rats were divided into Lepr−/− control group (KO) (n = 5), Lepr−/− with LWE-treated group (KL) (n = 5), WT control group (WT) (n = 6), and WT with LWE intervention group (WL) (n = 6). Then, the rats were administered water or LWE (700 mg/kg BW) daily by oral gavage for 24 weeks, respectively. The results showed that the administration of LWE significantly reduced the serum concentrations of random blood glucose, total cholesterol, triglyceride, and free fatty acids, and increased glucose tolerance in Lepr−/− rats. Moreover, LWE remarkably reduced hepatic lipid accumulation and alleviated fatty liver formation in Lepr−/− rats. A mechanistic study showed that LWE obviously activated SIRT6 and decreased the expression of key lipogenesis-related molecules SREBP1, FAS, and DGAT1 in the livers of Lepr−/− rats. Furthermore, LWE significantly improved microbiota dysbiosis via an increase in gut microbiota diversity and an abundance of the microbiota that produce short chain fatty acids (SCFAs), such as Ruminococcaceae, Faecalibaculum, Intestinimonas, and Alistipes. Finally, LWE supplementation increased the concentrations of SCFAs in the feces of Lepr−/− rats. These results revealed that LWE attenuated metabolic syndrome of Lepr−/− rats via the reduction of hepatic lipid synthesis through the SIRT6/SREBP1 pathway and the modulation of gut microbiota.
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Wu Y, Han Z, Wen M, Ho CT, Jiang Z, Wang Y, Xu N, Xie Z, Zhang J, Zhang L, Wan X. Screening of α-glucosidase inhibitors in large-leaf yellow tea by offline bioassay coupled with liquid chromatography tandem mass spectrometry. FOOD SCIENCE AND HUMAN WELLNESS 2022. [DOI: 10.1016/j.fshw.2021.12.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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24
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Wang P, Huang Y, Ren J, Rong Y, Fan L, Zhang P, Zhang X, Xi J, Mao S, Su M, Zhang B, Bao GH, Wu F. Large-leaf yellow tea attenuates high glucose-induced vascular endothelial cells injury by up-regulating autophagy and down-regulating oxidative stress. Food Funct 2022; 13:1890-1905. [DOI: 10.1039/d1fo03405g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Vascular endothelial cells injury induced by high glucose (HG) plays an important role in the occurrence and development of diabetic vascular complications. Yellow tea has a protective effect on vascular...
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Anaeigoudari A, Safari H, Khazdair MR. Effects of Nigella sativa, Camellia sinensis, and Allium sativum as Food Additives on Metabolic Disorders, a Literature Review. Front Pharmacol 2021; 12:762182. [PMID: 34867384 PMCID: PMC8637837 DOI: 10.3389/fphar.2021.762182] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Accepted: 10/25/2021] [Indexed: 12/29/2022] Open
Abstract
Objective: Metabolic disorders (MD) can disturb intracellular metabolic processes. A metabolic disorder can be resulted from enzyme deficits or disturbances in function of various organs including the liver, kidneys, pancreas, cardiovascular system, and endocrine system. Some herbs were used traditionally for spices, food additives, dietary, and medicinal purposes. Medicinal plants possess biological active compounds that enhance human health. We aimed to provide evidence about therapeutic effects of some medicinal herbs on MD. Data Sources: PubMed, Scopus, and Google Scholar were explored for publications linked to MD until February 2021. The most literature reports that were published in the last 10 years were used. All types of studies such as animal studies, clinical trials, and in vitro studies were included. The keywords included “Metabolic disorders,” “Nigella sativa L.,” “Thymoquinone,” “White tea”OR “Camellia sinensis L.” “catechin,” and “Allium sativum L.” OR “garlic” were searched. Results: Based on the results of scientific studies, the considered medicinal plants and their active components in this review have been able to exert the beneficial therapeutic effects on obesity, diabetes mellitus and non-alcoholic fatty liver disease. Conclusions: These effects are obvious by inhibition of lipid peroxidation, suppression of inflammatory reactions, adjustment of lipid profile, reduction of adipogenesis and regulation of blood glucose level.
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Affiliation(s)
- Akbar Anaeigoudari
- Department of Physiology, School of Medicine, Jiroft University of Medical Science, Jiroft, Iran
| | | | - Mohammad Reza Khazdair
- Cardiovascular Diseases Research Center, Birjand University of Medical Sciences, Birjand, Iran.,Applied Biomedical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
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26
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Metabolite differentiation and antiobesity effects between different grades of Yuexi Cuilan green tea. J Funct Foods 2021. [DOI: 10.1016/j.jff.2021.104794] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
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27
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Hsu YJ, Wu MF, Lee MC, Huang CC. Exercise training combined with Bifidobacterium longum OLP-01 treatment regulates insulin resistance and physical performance in db/db mice. Food Funct 2021; 12:7728-7740. [PMID: 34296722 DOI: 10.1039/d0fo02939d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Type 2 diabetes mellitus (T2DM) is a prevalent chronic disease characterized by hyperglycemia and insulin resistance. Regular exercise is one of the effective lifestyle interventions for maintaining healthy weight and blood glucose levels in the normal range and lowering risk factors. Probiotics, live microorganisms that are beneficial to health, are involved in the regulation of host metabolism. We thus hypothesize that the combination of exercise training and Bifidobacterium longum OLP-01 (OLP-01) could improve insulin sensitivity, blood glucose control and body composition in db/db mice. Twenty-four C57BL/6 J db/db male mice (20-weeks old) were divided into four groups (n = 6 per group): vehicle, OLP-01 supplementation (OLP-01), exercise training (EX) and exercise training with OLP-01 supplementation (EX + OLP-01). Animals in the EX and EX + OLP-01 groups underwent strength exercise training for 6 weeks, 5 days per week. After the exercise training, we tested forelimb grip strength, exhaustive running, oral glucose tolerance test (OGTT) and serum biomarkers. Results: Combined intervention of EX and OLP-01 prevented elevation of body weight and body fat. Grip strength and exhaustive swimming time were significantly higher in the EX + OLP-01 group than in the other groups. We found that EX OLP-01 reduced glycolipid parameters (fasting blood glucose and hemoglobin A1c), improved insulin sensitivity (oral glucose tolerance test and HOMA-IR), relieved liver injury parameters (aspartate aminotransferase and alanine aminotransferase) and repaired pancreas damage. Based on our findings, we speculate that the positive effects of combining EX with OLP-01 on capacity for physical activity, blood glucose control and body composition suggest an integrative approach to treating type 2 diabetes. Altogether, the combination of EX with OLP-01 treatment might be a good candidate for preventing and treating diabetes.
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Affiliation(s)
- Yi-Ju Hsu
- Graduate Institute of Sports Science, Natioal Taiwan Sport University, Taoyuan City 33301, Taiwan.
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28
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Park S, Lee JJ, Shin HW, Jung S, Ha JH. Effect of Soybean and Soybean Koji on Obesity and Dyslipidemia in Rats Fed a High-Fat Diet: A Comparative Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:6032. [PMID: 34199728 PMCID: PMC8199977 DOI: 10.3390/ijerph18116032] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Revised: 05/31/2021] [Accepted: 06/01/2021] [Indexed: 12/19/2022]
Abstract
Soybean koji refers to steamed soybeans inoculated with microbial species. Soybean fermentation improves the health benefits of soybeans. Obesity is a serious health concern owing to its increasing incidence rate and high association with other metabolic diseases. Therefore, we investigated the effects of soybean and soybean koji on high-fat diet-induced obesity in rats. Five-week-old male Sprague-Dawley rats were randomly divided into four groups (n = 8/group) as follows: (1) regular diet (RD), (2) high-fat diet (HFD), (3) HFD + steamed soybean (HFD+SS), and (4) HFD + soybean koji (HFD+SK). SK contained more free amino acids and unsaturated fatty acids than SS. In a rat model of obesity, SK consumption significantly alleviated the increase in weight of white adipose tissue and mRNA expression of lipogenic genes, whereas SS consumption did not. Both SS and SK reduced serum triglyceride, total cholesterol, and low-density lipoprotein cholesterol levels, and increased high-density lipoprotein cholesterol levels. SS and SK also inhibited lipid accumulation in the liver and white adipose tissue and reduced adipocyte size. Although both SS and SK could alleviate HFD-induced dyslipidemia, SK has better anti-obesity effects than SS by regulating lipogenesis. Overall, SK is an excellent functional food that may prevent obesity.
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Affiliation(s)
- Sihoon Park
- Department of Food and Nutrition, Chosun University, Gwangju 61452, Korea; (S.P.); (J.-J.L.)
| | - Jae-Joon Lee
- Department of Food and Nutrition, Chosun University, Gwangju 61452, Korea; (S.P.); (J.-J.L.)
| | - Hye-Won Shin
- Food R&D Institute, CJ CheilJedang Corp., Suwon 16495, Korea;
| | - Sunyoon Jung
- Research Center for Industrialization of Natural Neutralization, Dankook University, Cheonan 31116, Korea
- Department of Food Science and Nutrition, Dankook University, Cheonan 31116, Korea
| | - Jung-Heun Ha
- Research Center for Industrialization of Natural Neutralization, Dankook University, Cheonan 31116, Korea
- Department of Food Science and Nutrition, Dankook University, Cheonan 31116, Korea
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29
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Li M, Shen Y, Ling T, Ho CT, Li D, Guo H, Xie Z. Analysis of Differentiated Chemical Components between Zijuan Purple Tea and Yunkang Green Tea by UHPLC-Orbitrap-MS/MS Combined with Chemometrics. Foods 2021; 10:1070. [PMID: 34066071 PMCID: PMC8151513 DOI: 10.3390/foods10051070] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 05/08/2021] [Accepted: 05/10/2021] [Indexed: 12/13/2022] Open
Abstract
Zijuan tea (Camellia sinensis var. assamica cv. Zijuan) is a unique purple tea. Recently, purple tea has drawn much attention for its special flavor and health benefits. However, the characteristic compounds of purple tea compared with green tea have not been reported yet. The present study employed a non-targeted metabolomics approach based on ultra-high performance liquid chromatography (UHPLC)-Orbitrap-tandem mass spectrometry (MS/MS) for comprehensive analysis of characteristic metabolites between Zijuan purple tea (ZJT) and Yunkang green tea (YKT). Partial least squares-discriminant analysis (PLS-DA) indicated that there are significant differences in chemical profiles between ZJT and YKT. A total of 66 major differential metabolites included catechins, proanthocyanins, flavonol and flavone glycosides, phenolic acids, amino acids and alkaloids were identified in ZJT. Among them, anthocyanins are the most characteristic metabolites. Nine glycosides of anthocyanins and six glycosides of proanthocyanins were found to be significantly higher in ZJT than that in YKT. Subsequently, pathway analysis revealed that ZJT might generate anthocyanins and proanthocyanins through the flavonol and flavone glycosides. Furthermore, quantitative analysis showed absolutely higher concentrations of total anthocyanins in ZJT, which correlated with the metabolomics results. This study presented the comprehensive chemical profiling and the characterized metabolites of ZJT. These results also provided chemical evidence for potential health functions of ZJT.
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Affiliation(s)
- Mengwan Li
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei 230036, China; (M.L.); (Y.S.); (T.L.); (D.L.)
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei 230036, China;
| | - Ying Shen
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei 230036, China; (M.L.); (Y.S.); (T.L.); (D.L.)
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei 230036, China;
| | - Tiejun Ling
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei 230036, China; (M.L.); (Y.S.); (T.L.); (D.L.)
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei 230036, China;
| | - Chi-Tang Ho
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei 230036, China;
- Department of Food Science, Rutgers University, 65 Dudley Road, New Brunswick, NJ 08901, USA
| | - Daxiang Li
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei 230036, China; (M.L.); (Y.S.); (T.L.); (D.L.)
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei 230036, China;
| | - Huimin Guo
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei 230036, China; (M.L.); (Y.S.); (T.L.); (D.L.)
- Center for Biotechnology, Anhui Agricultural University, Hefei 230036, China
| | - Zhongwen Xie
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei 230036, China; (M.L.); (Y.S.); (T.L.); (D.L.)
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei 230036, China;
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30
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The Effect of Yellow Tea Leaves Camellia sinensis on the Quality of Stored Chocolate Confectionery. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11094123] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Chocolate and tea leaves are considered the most valuable sources of highly bioactive polyphenols due to their potential anti-cancer properties and beneficial effects on the cardiovascular and nervous systems. The objective of the present study was the development of a sensory profiling modality that is correlated with the taste of the chocolate enriched with yellow tea phytochemicals. The additive concentration was optimized in white chocolate and the designed product was evaluated using the sensory profiling method. It was shown that the yellow tea extract in chocolate had a significant effect on the taste and color of the product. Addition of 2.0% yellow tea powdered extract increased the value of color acceptance and caused an intensification of the aromas, particularly the leafy taste, compared to the control samples. The next step of the study was to determine the influence of tea addition in white, milk and dark chocolate subjected to 6 months of storage. The designed chocolates were tested for their activity as antioxidants (DPPH, ABTS and ORAC assay) and cholinesterase inhibitors (AChE, BChE assay). It was confirmed that the yellow tea addition affected the activity of prepared chocolates with respect to radical scavenging activity and was highest for dark chocolate with yellow tea where the values were as follows: 4373 mg Tx/100 g (DPPH), 386 mg Tx/100 g (ABTS) and 4363 µM Tx/100 g (ORAC). An increase in the anti-radical activity of chocolate with yellow tea was found after 3 months of storage, but the subsequent 3 months of storage resulted in its reduction. AChE values ranged from 0.118 to 0.730 [µM eserine/g dw] and from 0.095 to 0.480 [µM eserine/g dw] for BChE assay. Total capacity to inhibit AChE and BChE differed depending on the type of chocolate and was negatively influenced by the half-year storage. Summarizing tested values for individual samples were higher, with increasing content of cocoa liquor and yellow tea extract in the product. The results of the research show that the use of yellow tea in confectionery is promising and may appoint a new direction in functional foods.
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Manaer T, Yu L, Nabi XH, Dilidaxi D, Liu L, Sailike J. The beneficial effects of the composite probiotics from camel milk on glucose and lipid metabolism, liver and renal function and gut microbiota in db/db mice. BMC Complement Med Ther 2021; 21:127. [PMID: 33888105 PMCID: PMC8061000 DOI: 10.1186/s12906-021-03303-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Accepted: 04/13/2021] [Indexed: 02/07/2023] Open
Abstract
Background Probiotics may have beneficial effects on patients with type 2 diabetes mellitus (T2DM). We separated 4 lactobacillus and 1 saccharomycetes from traditional fermented cheese whey (TFCW) and prepared composite probiotics from camel milk (CPCM) and investigated their effects on glucose and lipid metabolism, liver and renal function and gut microbiota in db/db mice. Methods CPCM was prepared in the laboratory and 40 db/db mice were randomly divided into 4 groups as metformin, low-dose and high-dose group and model group, and treated for 6 weeks. In addition, 10 C57BL/Ks mice as normal control group were used for comparison. Fasting blood glucose (FBG), body weight (BW), oral glucose tolerance test (OGTT), glycated hemoglobin (HbAlc), C-peptide (CP), triglycerides (TG), total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), high density lipoprotein cholesterol (HDL-C), 24 h urinary microalbumin (24 h malb), urine ketone, urine sugar, pancreas and liver tissue and intestinal flora were tested. Results Compared to diabetic group, high dose CPCM significantly decreased FBG, OGTT, HbAlc and IRI, plasma TC, TG, LDL-C, 24 h malb, urine ketone and urine sugar, increased CP, HDL-C levels, improved the liver and kidney function, protected the function of islets, also increased intestinal tract lactic acid bacteria and Bifidobacterium, decreased Escherichia in db/db mice. Conclusion CPCM decreased FBG, OGTT and HbAlc, increased CP, modulated lipid metabolism and improved liver and kidney protected injury in db/db mice, which may be related to various probiotics acting through protecting the function of islets and regulating intestinal flora disturbance. Supplementary Information The online version contains supplementary material available at 10.1186/s12906-021-03303-4.
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Affiliation(s)
- Tabusi Manaer
- College of Pharmaceutical Sciences, Xinjiang Medical University, Urumqi, 830011, China.,Xinjiang Uygur Autonomous Region Institute for Drug Control, Urumqi, 830054, China
| | - Lan Yu
- College of Pharmaceutical Sciences, Xinjiang Medical University, Urumqi, 830011, China.,The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830011, China
| | - Xin-Hua Nabi
- College of Pharmaceutical Sciences, Xinjiang Medical University, Urumqi, 830011, China.
| | - Dinareer Dilidaxi
- College of Pharmaceutical Sciences, Xinjiang Medical University, Urumqi, 830011, China
| | - Lu Liu
- College of Pharmaceutical Sciences, Xinjiang Medical University, Urumqi, 830011, China
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Liu Z, Xiao M, Du Z, Li M, Guo H, Yao M, Wan X, Xie Z. Dietary supplementation of Huangshan Maofeng green tea preventing hypertension of older C57BL/6 mice induced by desoxycorticosterone acetate and salt. J Nutr Biochem 2021; 88:108530. [PMID: 33080347 DOI: 10.1016/j.jnutbio.2020.108530] [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: 06/08/2020] [Revised: 08/26/2020] [Accepted: 10/14/2020] [Indexed: 01/12/2023]
Abstract
Senile hypertension affects the life quality of aged population. Dietary intervention plays a pivotal role in the prevention of hypertension. There are few reports concerning the effects and mechanisms of green tea supplementation preventing age related hypertension. The current study investigated the effect and mechanism of dietary supplement of Huangshan Maofeng green tea (HSMF) on prevention of hypertension induced by deoxycorticosterone acetate (DOCA) and salt in old C57BL/6 mice. Our results showed that HSMF dose-dependently prevented the increase of systolic blood pressure and diastolic blood pressure induced by DOCA plus salt (DS) at 51-week-old mice. And HSMF significantly reduced the agonists' stimulated contraction of mesenteric arteries isolated from the old mice. The expression of vasoconstrictor genes and inflammatory cytokines in aorta were suppressed observably by HSMF supplementation compared with DS group. The protein expression of PKCα in the aorta was dose-dependently decreased by HSMF compared to DS group. The phosphorylation level of MYPT1, CPI-17and MLC20 was also restrained by HSMF in the aorta. Furthermore, HSMF protected kidney by maintaining integrity of glomeruli and tubules and remarkably decreased the NGAL level in plasma. HSMF also suppressed the kidney inflammation by decreasing inflammatory cytokines expression and the macrophage infiltration. Our results proved that dietary supplement of HSMF remarkably improved the vascular functions and protected kidney injury, and thus prevented hypertension induced by DS in older C57BL/6 mice. Our data indicated that the dietary supplement of HSMF may potentially be used as a food additive for preventing hypertension for aged people.
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Affiliation(s)
- Zenghui Liu
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei, China; Anhui Academy of Medical Science, Hefei, China
| | - Mengchao Xiao
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei, China
| | - Zhaofeng Du
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei, China; School of Biology and Food Engineering, Fuyang Normal University, Fuyang, China
| | - Mengwan Li
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei, China
| | - Huimin Guo
- Center for Biotechnology, Anhui Agricultural University, Hefei, China
| | - Min Yao
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei, China
| | - Xiaochun Wan
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei, China.
| | - Zhongwen Xie
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei, China.
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Roghani-Shahraki H, Karimian M, Valipour S, Behjati M, Arefnezhad R, Mousavi A. Herbal therapy as a promising approach for regulation on lipid profiles: A review of molecular aspects. J Cell Physiol 2021; 236:5533-5546. [PMID: 33469926 DOI: 10.1002/jcp.30282] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 12/24/2020] [Accepted: 01/04/2021] [Indexed: 01/18/2023]
Abstract
Impaired lipid profile is defined as abnormal plasma levels of low-density lipoprotein, triglycerides, and total cholesterol. This disease state is associated with the development and progression of various disorders, such as diabetes mellitus, cardiovascular diseases, and acute myocardial infarction. Globally, all of these disorders are related to a significant rate of death. Therefore, finding a suitable approach for the prevention and treatment of lipid profile-related disorders is in the spotlight. Recently, herbal therapy has been considered a promising therapeutic approach for the treatment of hyperlipidemia or its related disorders due to its safety and efficacy. Hereby, we address the potential benefits of some of these herbal compounds on different aspects of lipid profile and its abnormalities with a special focus on their underlying mechanisms. Using herbal products, such as teas and mushrooms, or their derivatives, Rosmarinus officinalis Linn, Curcuma longa, Green tea, Lippia triphylla, Lippia citriodora, Plantago asiatica L, Vine tea, and Grifola frondosa have been proved to exert several therapeutic impacts on lipid profile and its related disorders, and we would provide a brief review on them in this literature.
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Affiliation(s)
| | - Mohammad Karimian
- Department of Molecular and Cell Biology, Faculty of Basic Sciences, University of Mazandaran, Babolsar, Iran
| | - Saboora Valipour
- Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Mohaddeseh Behjati
- Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Reza Arefnezhad
- Halal Research Center of IRI, FDA, Tehran, Iran.,Department of Anatomy, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Abolfazl Mousavi
- Department of Basic Sciences, School of Veterinary Medicine, Semnan University, Iran
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Plant Extracts for Type 2 Diabetes: From Traditional Medicine to Modern Drug Discovery. Antioxidants (Basel) 2021; 10:antiox10010081. [PMID: 33435282 PMCID: PMC7827314 DOI: 10.3390/antiox10010081] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 01/04/2021] [Accepted: 01/07/2021] [Indexed: 12/17/2022] Open
Abstract
Type 2 diabetes mellitus (T2DM) is one of the largest public health problems worldwide. Insulin resistance-related metabolic dysfunction and chronic hyperglycemia result in devastating complications and poor prognosis. Even though there are many conventional drugs such as metformin (MET), Thiazolidinediones (TZDs), sulfonylureas (SUF), dipeptidyl peptidase 4 (DPP-4) inhibitors, glucagon like peptide 1 (GLP-1) and sodium-glucose cotransporter-2 (SGLT-2) inhibitors, side effects still exist. As numerous plant extracts with antidiabetic effects have been widely reported, they have the potential to be a great therapeutic agent for type 2 diabetes with less side effects. In this study, sixty-five recent studies regarding plant extracts that alleviate type 2 diabetes were reviewed. Plant extracts regulated blood glucose through the phosphoinositide 3-kinase (PI3K)/protein kinase B (Akt) pathway. The anti-inflammatory and antioxidant properties of plant extracts suppressed c-Jun amino terminal kinase (JNK) and nuclear factor kappa B (NF-κB) pathways, which induce insulin resistance. Lipogenesis and fatty acid oxidation, which are also associated with insulin resistance, are regulated by AMP-activated protein kinase (AMPK) activation. This review focuses on discovering plant extracts that alleviate type 2 diabetes and exploring its therapeutic mechanisms.
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Xu N, Chu J, Dong R, Lu F, Zhang X, Wang M, Shen Y, Xie Z, Ho CT, Yang CS, Wang Y, Wan X. Yellow Tea Stimulates Thermogenesis in Mice through Heterogeneous Browning of Adipose Tissues. Mol Nutr Food Res 2021; 65:e2000864. [PMID: 33258303 DOI: 10.1002/mnfr.202000864] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 10/20/2020] [Indexed: 02/27/2024]
Abstract
SCOPE Large-leaf yellow tea (YT) exhibits interesting beneficial metabolic effects in previous studies. Here, the authors elucidated the actions of YT on thermogenesis, energy metabolism, and adipocyte metabolic conversion. METHODS AND RESULTS Five-week-old male C57BL/6 mice are fed low-fat diet, high-fat diet (HFD), and HFD supplemented with 0.5% or 2.5% YT. After treatment for 10 or 14 weeks, YT enhances energy expenditure, O2 consumption and CO2 production. YT strongly boosts thermogenic program in brown adipose tissue (BAT) and subcutaneous adipose tissue (SAT), while only weakly in epididymal adipose tissue (EAT). These are accompanied by higher body temperature, increased mitochondrial copy numbers, and upregulation of thermogenic genes (Ucp1, Pgc1α, etc.) and proteins. The classic brown adipocyte markers (Eva1, Zic1) are induced only in BAT, while beige adipocyte markers (Tbx1, Tmem26) are boosted only in SAT. Furthermore, subcutaneous-originated preadipocytes are induced by YT in vitro to differentiate to brown-like adipocytes - a browning effect. CONCLUSION Dietary YT induces adaptive thermogenesis through increasing mitochondrial biogenesis in EAT, inducing beigeing in SAT and enhancing browning in the BAT.
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Affiliation(s)
- Na Xu
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, Anhui, 230036, P. R. China
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Anhui Agricultural University, Hefei, Anhui, 230036, P. R. China
- Department of Medical Oncology, Dana-Farber Cancer Institute, 450 Brookline, Boston, MA, 02215, USA
| | - Jun Chu
- Department of Medical Oncology, Dana-Farber Cancer Institute, 450 Brookline, Boston, MA, 02215, USA
- Key Laboratory of Xin 'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui, 230038, P. R. China
| | - Rongrong Dong
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, Anhui, 230036, P. R. China
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Anhui Agricultural University, Hefei, Anhui, 230036, P. R. China
| | - Fengjuan Lu
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, Anhui, 230036, P. R. China
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Anhui Agricultural University, Hefei, Anhui, 230036, P. R. China
| | - Xinfeng Zhang
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, Anhui, 230036, P. R. China
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Anhui Agricultural University, Hefei, Anhui, 230036, P. R. China
| | - Min Wang
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, Anhui, 230036, P. R. China
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Anhui Agricultural University, Hefei, Anhui, 230036, P. R. China
| | - Ying Shen
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, Anhui, 230036, P. R. China
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Anhui Agricultural University, Hefei, Anhui, 230036, P. R. China
| | - Zhongwen Xie
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, Anhui, 230036, P. R. China
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Anhui Agricultural University, Hefei, Anhui, 230036, P. R. China
| | - Chi-Tang Ho
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Anhui Agricultural University, Hefei, Anhui, 230036, P. R. China
- Department of Food Science, Rutgers University, 65 Dudley Road, New Brunswick, NJ, 08901-8520, USA
| | - Chung S Yang
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Anhui Agricultural University, Hefei, Anhui, 230036, P. R. China
- Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers University, 164 Frelinghuysen Rd, Piscataway, NJ, 08855, USA
| | - Yijun Wang
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, Anhui, 230036, P. R. China
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Anhui Agricultural University, Hefei, Anhui, 230036, P. R. China
| | - Xiaochun Wan
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, Anhui, 230036, P. R. China
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Anhui Agricultural University, Hefei, Anhui, 230036, P. R. China
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Wang H, Chen J, Ren P, Zhang Y, Omondi Onyango S. Ultrasound irradiation alters the spatial structure and improves the antioxidant activity of the yellow tea polysaccharide. ULTRASONICS SONOCHEMISTRY 2021; 70:105355. [PMID: 33007535 PMCID: PMC7786635 DOI: 10.1016/j.ultsonch.2020.105355] [Citation(s) in RCA: 72] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 09/05/2020] [Accepted: 09/18/2020] [Indexed: 05/04/2023]
Abstract
In this study, the impact of ultrasound irradiation on the structural characteristics and antioxidant properties of yellow tea polysaccharides with different molecular weights (Mw) were investigated. Native yellow tea polysaccharide containing YTPS-3N, YTPS-5N and YTPS-7N were prepared through precipitation with ethanol at various concentrations of 30%, 50%, and 70%, respectively, and irradiated with high intensity ultrasound (20 kHz) for 55 min to yield yellow tea polysaccharide including YTPS-3U, YTPS-5U and YTPS-7U. The molecular weight (Mw) of YTPS-3N (from 37.7 to 15.1 kDa) and YTPS-5N (from 14.6 to 5.2 kDa) sharply decreased upon ultrasound irradiation, coincidentally particle size (Zavg) was also significantly reduced for YTPS-3N (40%), YTPS-5N (48%) and YTPS-7N (54%). The high-performance liquid chromatography and Fourier transform-infrared spectroscopy analysis revealed a partial degradation of native yellow tea polysaccharide treated with ultrasound, though the monosaccharide composition was not altered. Furthermore, changes in morphology and the breakdown of native yellow tea polysaccharide upon irradiation was confirmed with the circular dichroism spectrum, atomic force and scanning electron microscopy. As a consequence, irradiation of yellow tea polysaccharide increased free radical scavenging activity with YTPS-7U exhibiting the highest levels of 2, 2-diphenyl-1-picrylhydrazyl free radical, superoxide and hydroxyl radicals scavenging activity. These results suggest that the alteration of the spatial structure of yellow tea polysaccharide can enhance its antioxidant activity which is an important property for functional foods or medicines.
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Affiliation(s)
- Haisong Wang
- School of Biology and Food Engineering, Changshu Institute of Technology, Jiangsu, PR China; School of Tea and Food Science & Technology, Anhui Agricultural University, Anhui, PR China.
| | - Jinran Chen
- School of Tea and Food Science & Technology, Anhui Agricultural University, Anhui, PR China
| | - Pengfei Ren
- School of Tea and Food Science & Technology, Anhui Agricultural University, Anhui, PR China
| | - Yiwen Zhang
- School of Tea and Food Science & Technology, Anhui Agricultural University, Anhui, PR China
| | - Stanley Omondi Onyango
- Department of Biotechnology, Faculty of Bioscience Engineering, Center for Microbial Ecology and Technology (CMET), Ghent University, Ghent, Belgium
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α-Lactalbumin ameliorates hepatic lipid metabolism in high-fat-diet induced obese C57BL/6J mice. J Funct Foods 2020. [DOI: 10.1016/j.jff.2020.104253] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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38
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Zhao G, Wu X, Wang W, Yang CS, Zhang J. Tea Drinking Alleviates Diabetic Symptoms via Upregulating Renal Water Reabsorption Proteins and Downregulating Renal Gluconeogenic Enzymes in db/db Mice. Mol Nutr Food Res 2020; 64:e2000505. [PMID: 33052021 DOI: 10.1002/mnfr.202000505] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 09/19/2020] [Indexed: 01/01/2023]
Abstract
SCOPE Tea, made from the plant Camellia sinensis, is known to have anti-diabetes effects and different mechanisms of action are proposed. Kidney is a vital organ in managing water reabsorption and glucose metabolism, and is greatly influenced by diabetes. The present study investigates the effects of tea administration on water reabsorption and gluconeogenesis in the kidney of diabetic mice. METHODS AND RESULTS Db/db mice are given tea infusion as drinking fluid when they begin to exhibit hyperglycemia. It is found that green tea or black tea infusion potently elevates renal proteins vital for water reabsorption, including protein kinase C-α, aquaporin 2, and urea transporter-A1, as well as increases trafficking of these proteins to apical plasma membrane where they exert water reabsorption function. The treatment also downregulates renal gluconeogenic enzymes, including glucose-6-phosphatase-α and phosphoenolpyruvate carboxykinase. Associated with these biochemical changes are the rectified polyuria, polydipsia, polyphagia, and hyperglycemia, all symptoms of diabetes. CONCLUSIONS For the first time, the present study demonstrates that tea has robust effects in enhancing kidney water reabsorption proteins and downregulating gluconeogenic enzymes in db/db mice. It remains to be investigated whether such beneficial effects of tea occur in humans.
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Affiliation(s)
- Guangshan Zhao
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, Anhui, 230036, China
- Biology Postdoctoral Research Station, Department of Cell Biology, College of Life Science and Technology, Jinan University, Guangzhou, Guangdong, 510632, China
- Guangzhou Jinan Biomedicine Research and Development Center, Institute of Biomedicine, College of Life Science and Technology, Jinan University, Guangzhou, Guangdong, 510632, China
| | - Ximing Wu
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Wenping Wang
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Chung S Yang
- Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ, 08854-8020, USA
- International Joint Research Laboratory of Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Jinsong Zhang
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea & Food Science, Anhui Agricultural University, Hefei, Anhui, 230036, China
- International Joint Research Laboratory of Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, 230036, China
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Luo K, Ma C, Xing S, An Y, Feng J, Dang H, Huang W, Qiao L, Cheng J, Xie L. White tea and its active polyphenols lower cholesterol through reduction of very-low-density lipoprotein production and induction of LDLR expression. Biomed Pharmacother 2020; 127:110146. [PMID: 32334376 DOI: 10.1016/j.biopha.2020.110146] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 04/02/2020] [Accepted: 04/04/2020] [Indexed: 12/19/2022] Open
Abstract
Emerging in vivo and vitro data suggest that white tea extract (WTE) is capable of favourably modulating metabolic syndrome, especially by ameliorating abnormal lipid metabolism. Microarray-based gene expression profiling was performed in HepG2 cells to analyze the effects of WTE from a systematic perspective. Gene Ontology and pathway analysis revealed that WTE significantly affected pathways related to lipid metabolism. WTE significantly downregulated apolipoprotein B (APOB) and microsomal triglyceride transfer protein (MTTP) expression and thereby reduced the production of very-low-density lipoprotein. In the meanwhile, WTE stimulated low-density lipoprotein-cholesterol (LDL-c) uptake through targeting low-density lipoprotein receptor (LDLR), as a consequence of the activation of sterol regulatory element-binding protein 2 (SREBP2) and peroxisome proliferator-activated receptor δ (PPARδ). Furthermore, WTE significantly downregulated triglycerides synthetic genes and reduced intracellular triglycerides accumulation. Besides, we demonstrated that the tea catechins epigallocatechin-3-gallate (EGCG) and epicatechin-3-gallate (ECG) are abundant in WTE and contribute to the regulation of cholesterol metabolism related genes, including LDLR, MTTP and APOB. Our findings suggest white tea plays important roles in ameliorating abnormal lipid metabolism in vitro.
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Affiliation(s)
- Kun Luo
- State Key Laboratory of Membrane Biology, School of Medicine, Tsinghua University, Beijing, 100084, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, 310003, China; Medical Systems Biology Research Center, School of Medicine, Tsinghua University, Beijing, 100084, China
| | - Chengmei Ma
- National Engineering Research Center for Beijing Biochip Technology, Beijing, 102206, China
| | - Shaofang Xing
- National Engineering Research Center for Beijing Biochip Technology, Beijing, 102206, China
| | - Yannan An
- National Engineering Research Center for Beijing Biochip Technology, Beijing, 102206, China
| | - Juan Feng
- State Key Laboratory of Membrane Biology, School of Medicine, Tsinghua University, Beijing, 100084, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, 310003, China; Medical Systems Biology Research Center, School of Medicine, Tsinghua University, Beijing, 100084, China
| | - Honglei Dang
- National Engineering Research Center for Beijing Biochip Technology, Beijing, 102206, China
| | - Wenting Huang
- State Key Laboratory of Membrane Biology, School of Medicine, Tsinghua University, Beijing, 100084, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, 310003, China; Medical Systems Biology Research Center, School of Medicine, Tsinghua University, Beijing, 100084, China
| | - Liansheng Qiao
- State Key Laboratory of Membrane Biology, School of Medicine, Tsinghua University, Beijing, 100084, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, 310003, China; Medical Systems Biology Research Center, School of Medicine, Tsinghua University, Beijing, 100084, China
| | - Jing Cheng
- State Key Laboratory of Membrane Biology, School of Medicine, Tsinghua University, Beijing, 100084, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, 310003, China; Medical Systems Biology Research Center, School of Medicine, Tsinghua University, Beijing, 100084, China; National Engineering Research Center for Beijing Biochip Technology, Beijing, 102206, China.
| | - Lan Xie
- State Key Laboratory of Membrane Biology, School of Medicine, Tsinghua University, Beijing, 100084, China; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, 310003, China; Medical Systems Biology Research Center, School of Medicine, Tsinghua University, Beijing, 100084, China; National Engineering Research Center for Beijing Biochip Technology, Beijing, 102206, China.
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Kotzé-Hörstmann LM, Sadie-Van Gijsen H. Modulation of Glucose Metabolism by Leaf Tea Constituents: A Systematic Review of Recent Clinical and Pre-clinical Findings. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:2973-3005. [PMID: 32105058 DOI: 10.1021/acs.jafc.9b07852] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Leaf teas are widely used as a purported treatment for dysregulated glucose homeostasis. The objective of this study was to systematically evaluate the clinical and cellular-metabolic evidence, published between January 2013 and May 2019, and indexed on PubMed, ScienceDirect, and Web of Science, supporting the use of leaf teas for this purpose. Fourteen randomized controlled trials (RCTs) (13 on Camellia sinensis teas) were included, with mixed results, and providing scant mechanistic information. In contrast, 74 animal and cell culture studies focusing on the pancreas, liver, muscle, and adipose tissue yielded mostly positive results and highlighted enhanced insulin signaling as a recurring target associated with the effects of teas on glucose metabolism. We conclude that more studies, including RCTs and pre-clinical studies examining teas from a wider variety of species beyond C. sinensis, are required to establish a stronger evidence base on the use of leaf teas to normalize glucose metabolism.
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Affiliation(s)
- Liske M Kotzé-Hörstmann
- Centre for Cardio-metabolic Research in Africa (CARMA), Division of Medical Physiology, Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Stellenbosch University Tygerberg Campus, Parow 7505, South Africa
| | - Hanél Sadie-Van Gijsen
- Centre for Cardio-metabolic Research in Africa (CARMA), Division of Medical Physiology, Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Stellenbosch University Tygerberg Campus, Parow 7505, South Africa
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Zhang Y, Gu M, Wang R, Li M, Li D, Xie Z. Dietary supplement of Yunkang 10 green tea and treadmill exercise ameliorate high fat diet induced metabolic syndrome of C57BL/6 J mice. Nutr Metab (Lond) 2020; 17:14. [PMID: 32042300 PMCID: PMC7001212 DOI: 10.1186/s12986-020-0433-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 01/20/2020] [Indexed: 12/15/2022] Open
Abstract
Background Diet and exercise play important roles in ameliorating metabolic syndrome. Yunkang 10 (Camellia sinensis var. assamica) is a most cultivated tea variety for making tea in the Southwestern China. Currently, there is no report of healthy effects of Yunkang 10 green tea (YKGT) and treadmill exercise (Ex) on high fat diet induced metabolic syndrome (MetS). We aimed to investigate the beneficial effects and molecular mechanism of YKGT and Ex using high fat diet induced MetS of C57BL/6 mice. Methods Catechins and caffeine in water extract of YKGT were measured via high performance liquid chromatography (HPLC). 10-week old mice were fed with high fat diet (HFD) for 10 weeks to induce obese mice. Then the obese mice were fed with continuous high fat diet (HFD), HFD with YKGT, HFD with Ex, and HFD with both YKGT and Ex for 8 weeks, respectively. The another group of 10-week old mice fed with low fat diet (LFD) were used as control. Results HPLC data revealed that YKGT has abundantly high concentration of epigallocatechin gallate (EGCG) and caffeine compared to Longjing 43 (Camellia sinensis var. sinensis) green tea. YKGT and Ex significantly decreased the level of blood glucose, serum total cholesterol (TC), triglyceride (TG), insulin, and alanine aminotransferase activity (ALT) when compared to HFD group. The fatty liver and hepatic pro-inflammatory gene expression in the YKGT, Ex and YKGT+Ex groups was mitigated significantly compared with HFD group, respectively. The phosphorylation of inhibitor of nuclear factor kappa-B kinase α/β (IKKα/β) and inhibitor of nuclear factor kappa-B α (IkBα) protein in the nuclear factor kappa-light-chain-enhancer of activated B cells (NF-kB) signaling pathway was also decreased in YKGT or YKGT+Ex groups. The combination of YKGT and Ex prevented gene expression for lipid synthesis in the liver tissue, and significantly upregulated mRNA level of glucose transport genes in the skeletal muscles, when compared to the HFD group. Conclusions This study demonstrated that YKGT supplement or exercise appeared to reverse preexisting metabolic syndrome, and effectively relieved the fatty liver and hepatic inflammatory response induced by high fat diet. YKGT supplement and treadmill exercise together had better beneficial effects than only one intervention.
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Affiliation(s)
- Yanzhong Zhang
- 1Department of Sports Sciences, Anhui Agricultural University, Hefei, Anhui People's Republic of China.,2State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, 130 West Changjiang Road, Hefei, Anhui Province 230036 People's Republic of China
| | - Mingxing Gu
- 2State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, 130 West Changjiang Road, Hefei, Anhui Province 230036 People's Republic of China
| | - Ruru Wang
- 2State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, 130 West Changjiang Road, Hefei, Anhui Province 230036 People's Republic of China
| | - Menwan Li
- 2State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, 130 West Changjiang Road, Hefei, Anhui Province 230036 People's Republic of China
| | - Daxiang Li
- 2State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, 130 West Changjiang Road, Hefei, Anhui Province 230036 People's Republic of China
| | - Zhongwen Xie
- 2State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, 130 West Changjiang Road, Hefei, Anhui Province 230036 People's Republic of China
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Yu S, Guo X, Li G, Yang H, Sun G, Zheng L, Sun Y. Gender discrepancy of incidence and risk factors of metabolic syndrome among rural Chinese from 2012-2013 to 2015-2017. Diabetol Metab Syndr 2020; 12:48. [PMID: 32514317 PMCID: PMC7268361 DOI: 10.1186/s13098-020-00542-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 04/15/2020] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND We reported a relatively high rate of MetS in rural Northeast residents in 2012-2013. Many strategies like health knowledge propagation and lifestyle modification have been taken to help rural residents decrease metabolic disorders. Hence, we held the present follow-up study in order to figure the changes of metabolic parameters and the possible reasons together with the evaluation of MetS incidence and associated risk factors. METHODS A population-based sample of 8147 rural Northeast Chinese residents aged ≥ 35 years at baseline were followed up from 2012-2013 to 2015-2017. MetS was diagnosed following the unify criteria in 2009 using the Asian specific criteria. RESULTS Among residents with MetS at baseline, value of systolic, diastolic blood pressure, total cholesterol, HDL-C decreased while waist circumference increased in both genders in follow-up. Discrepancy of trend in body mass index, LDL-C and estimated GFR existed between male and female. Besides, triglyceride increased, and fast glucose decreased in female only. The alterations of dietary pattern might be accountable for those changes. Among residents without MetS at baseline, the cumulative incidence of newly diagnosed MetS was 24.0% (25.8% for male; 22.3% for female). As the number of metabolic disorders increased at baseline, the incidence of MetS also increased (zero metabolic disorder: 8.3%; one metabolic disorder: 17.1%; two metabolic disorders: 35.4%). In male residents, bad living habits like smoking and drinking were associated with increasing risk of Mets while in female, higher risk of MetS was more likely relevant to dietary pattern. CONCLUSION Metabolic parameters changes during the past years and seem to be associated with alteration of diet pattern. Incidence of MetS still high among rural Northeast Chinese. The risk factors of higher incidence of MetS show gender discrepancy which make the prophylaxis and control of MetS more effective and directive in rural residents.
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Affiliation(s)
- Shasha Yu
- Department of Cardiology, First Hospital of China Medical University, Shenyang, 110001 China
| | - Xiaofan Guo
- Department of Cardiology, First Hospital of China Medical University, Shenyang, 110001 China
| | - GuangXiao Li
- Department of Clinical Epidemiology, Institute of Cardiovascular Diseases, First Hospital of China Medical University, Shenyang, 110001 China
| | - Hongmei Yang
- Department of Cardiology, First Hospital of China Medical University, Shenyang, 110001 China
| | - Guozhe Sun
- Department of Cardiology, First Hospital of China Medical University, Shenyang, 110001 China
| | - Liqiang Zheng
- Department of Clinical Epidemiology, Shengjing Hospital of China Medical University, Shenyang, 110004 China
| | - Yingxian Sun
- Department of Cardiology, First Hospital of China Medical University, Shenyang, 110001 China
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Dai Q, Liu S, Jiang Y, Gao J, Jin H, Zhang Y, Zhang Z, Xia T. Recommended storage temperature for green tea based on sensory quality. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2019; 56:4333-4348. [PMID: 31478003 DOI: 10.1007/s13197-019-03902-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 03/25/2019] [Accepted: 06/24/2019] [Indexed: 10/26/2022]
Abstract
This study aimed to evaluate the effect of storage temperature on the alteration of the sensory quality of tea. Huangshan Maofeng tea was stored at - 80 °C, - 20 °C, 4 °C, or room temperature for up to 150 days. The physicochemical parameters, taste-related components, appearance color, volatile compounds and sensory quality of tea were analyzed and compared. Results showed that storing tea at - 80 °C and - 20 °C effectively preserved the physicochemical parameters, taste-related compounds and appearance color in tea. Multivariate statistical analysis (PCA and OPLS-DA) indicated that tea stored at - 80 °C exhibited a similar volatiles composition as fresh tea based on gas chromatography-mass spectrometry, whereas the composition of volatiles was significantly altered in tea stored at 4 °C after 100 days of storage. Sensory evaluation illustrated that tea stored at - 80 °C and - 20 °C remained the freshness regarding leaves appearance and tea infusion color, taste and aroma, whereas an obvious decrease on the tea freshness was found in tea stored at 4 °C and room temperature. These findings indicated that storage temperature played a vital role in altering the aromatic and sensory quality of Huangshan Maofeng tea and the recommended tea storage temperature was - 80 °C or - 20 °C.
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Affiliation(s)
- Qianying Dai
- 1State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, 230036 Anhui China.,2School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei, 230036 Anhui China
| | - Sitong Liu
- 1State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, 230036 Anhui China.,2School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei, 230036 Anhui China
| | - Yurong Jiang
- 1State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, 230036 Anhui China.,2School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei, 230036 Anhui China
| | - Jing Gao
- 1State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, 230036 Anhui China.,2School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei, 230036 Anhui China
| | - Huozhu Jin
- 1State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, 230036 Anhui China.,2School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei, 230036 Anhui China
| | - Yajuan Zhang
- 1State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, 230036 Anhui China.,2School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei, 230036 Anhui China
| | - Zhengzhu Zhang
- 1State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, 230036 Anhui China.,2School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei, 230036 Anhui China
| | - Tao Xia
- 1State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, 230036 Anhui China.,2School of Tea and Food Science & Technology, Anhui Agricultural University, Hefei, 230036 Anhui China
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Meng JM, Cao SY, Wei XL, Gan RY, Wang YF, Cai SX, Xu XY, Zhang PZ, Li HB. Effects and Mechanisms of Tea for the Prevention and Management of Diabetes Mellitus and Diabetic Complications: An Updated Review. Antioxidants (Basel) 2019; 8:E170. [PMID: 31185622 PMCID: PMC6617012 DOI: 10.3390/antiox8060170] [Citation(s) in RCA: 87] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 06/04/2019] [Accepted: 06/06/2019] [Indexed: 02/07/2023] Open
Abstract
Diabetes mellitus has become a serious and growing public health concern. It has high morbidity and mortality because of its complications, such as diabetic nephropathy, diabetic cardiovascular complication, diabetic neuropathy, diabetic retinopathy, and diabetic hepatopathy. Epidemiological studies revealed that the consumption of tea was inversely associated with the risk of diabetes mellitus and its complications. Experimental studies demonstrated that tea had protective effects against diabetes mellitus and its complications via several possible mechanisms, including enhancing insulin action, ameliorating insulin resistance, activating insulin signaling pathway, protecting islet β-cells, scavenging free radicals, and decreasing inflammation. Moreover, clinical trials also confirmed that tea intervention is effective in patients with diabetes mellitus and its complications. Therefore, in order to highlight the importance of tea in the prevention and management of diabetes mellitus and its complications, this article summarizes and discusses the effects of tea against diabetes mellitus and its complications based on the findings from epidemiological, experimental, and clinical studies, with the special attention paid to the mechanisms of action.
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Affiliation(s)
- Jin-Ming Meng
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Nutrition, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China.
| | - Shi-Yu Cao
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Nutrition, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China.
| | - Xin-Lin Wei
- Department of Food Science & Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Ren-You Gan
- Department of Food Science & Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Yuan-Feng Wang
- College of Life Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China.
| | - Shu-Xian Cai
- Key Laboratory of Ministry of Education for Tea Science, Hunan Agricultural University, Changsha 410128, China.
| | - Xiao-Yu Xu
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Nutrition, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China.
| | - Pang-Zhen Zhang
- School of Agriculture and Food, The University of Melbourne, Parkville, Victoria 3010, Australia.
| | - Hua-Bin Li
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Nutrition, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China.
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Li D, Wang R, Huang J, Cai Q, Yang CS, Wan X, Xie Z. Effects and Mechanisms of Tea Regulating Blood Pressure: Evidences and Promises. Nutrients 2019; 11:E1115. [PMID: 31109113 PMCID: PMC6567086 DOI: 10.3390/nu11051115] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 04/30/2019] [Accepted: 05/14/2019] [Indexed: 12/21/2022] Open
Abstract
Cardiovascular diseases have overtaken cancers as the number one cause of death. Hypertension is the most dangerous factor linked to deaths caused by cardiovascular diseases. Many researchers have reported that tea has anti-hypertensive effects in animals and humans. The aim of this review is to update the information on the anti-hypertensive effects of tea in human interventions and animal studies, and to summarize the underlying mechanisms, based on ex-vivo tissue and cell culture data. During recent years, an increasing number of human population studies have confirmed the beneficial effects of tea on hypertension. However, the optimal dose has not yet been established owing to differences in the extent of hypertension, and complicated social and genetic backgrounds of populations. Therefore, further large-scale investigations with longer terms of observation and tighter controls are needed to define optimal doses in subjects with varying degrees of hypertensive risk factors, and to determine differences in beneficial effects amongst diverse populations. Moreover, data from laboratory studies have shown that tea and its secondary metabolites have important roles in relaxing smooth muscle contraction, enhancing endothelial nitric oxide synthase activity, reducing vascular inflammation, inhibiting rennin activity, and anti-vascular oxidative stress. However, the exact molecular mechanisms of these activities remain to be elucidated.
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Affiliation(s)
- Daxiang Li
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei 230036, China.
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Anhui Agricultural University, Hefei 230036, China.
| | - Ruru Wang
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei 230036, China.
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Anhui Agricultural University, Hefei 230036, China.
| | - Jinbao Huang
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei 230036, China.
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Anhui Agricultural University, Hefei 230036, China.
| | - Qingshuang Cai
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei 230036, China.
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Anhui Agricultural University, Hefei 230036, China.
| | - Chung S Yang
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Anhui Agricultural University, Hefei 230036, China.
- Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ 08854-8020, USA.
| | - Xiaochun Wan
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei 230036, China.
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Anhui Agricultural University, Hefei 230036, China.
| | - Zhongwen Xie
- State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Sciences and Technology, Anhui Agricultural University, Hefei 230036, China.
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Anhui Agricultural University, Hefei 230036, China.
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Zhou J, Ho CT, Long P, Meng Q, Zhang L, Wan X. Preventive Efficiency of Green Tea and Its Components on Nonalcoholic Fatty Liver Disease. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:5306-5317. [PMID: 30892882 DOI: 10.1021/acs.jafc.8b05032] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Nonalcoholic fatty liver disease (NAFLD) is a typical chronic liver disease highly correlated with metabolic syndrome. Growing prevalence of NAFLD is supposed to be linked with the unhealthy lifestyle, especially high-calorie diet and lacking enough exercise. Currently, there is no validated pharmacological therapy for NAFLD except for weight reduction. However, many dietary strategies had preventive effects on the development of liver steatosis or its progression. As one of the most common beverages, green tea contains abundant bioactive compounds possessing antioxidant, lipid-lowering, and anti-inflammatory effects, as well as improving insulin resistance and gut dysbiosis that can alleviate the risk of NAFLD. Hence, in this review, we summarized the studies of green tea and its components on NAFLD from animal experiments and human interventions and discussed the potential mechanisms. Available evidence suggested that tea consumption is promising to prevent NAFLD, and further mechanisms and clinical studies need to be investigated.
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Affiliation(s)
| | - Chi-Tang Ho
- Department of Food Science , Rutgers University , New Brunswick , New Jersey , United States
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Xiang J, Lv Q, Yi F, Song Y, Le L, Jiang B, Xu L, Xiao P. Dietary Supplementation of Vine Tea Ameliorates Glucose and Lipid Metabolic Disorder via Akt Signaling Pathway in Diabetic Rats. Molecules 2019; 24:molecules24101866. [PMID: 31096578 PMCID: PMC6571802 DOI: 10.3390/molecules24101866] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 05/09/2019] [Accepted: 05/12/2019] [Indexed: 12/27/2022] Open
Abstract
A traditional Chinese tea with many pharmacological effects, vine tea (VT) is considered a potential dietary supplement to improve type 2 diabetes (T2D). To investigate the effect and mechanism of VT on glucose and lipid metabolic disorders in T2D rats, Wistar rats fed a normal diet served as the normal control, while rats fed a high-fat diet combined with low-dose streptozotocin (STZ)-induced T2D were divided into three groups: The model group (MOD); the positive control group (MET, metformin at 200 mg/kg/d); and the VT-treated group (VT500, allowed to freely drink 500 mg/L VT). After four weeks of intervention, biochemical metrics indicated that VT significantly ameliorated hyperglycemia, hyperlipidemia and hyperinsulinemia in T2D rats. Metabolomics research indicated that VT regulated the levels of metabolites closely related to glucose and lipid metabolism and promoted glycogen synthesis. Furthermore, VT had a significant influence on the expression of key genes involved in the Akt signaling pathway, inhibited gluconeogenesis through the Akt/Foxo1/Pck2 signaling pathway, and reduced fatty acid synthesis via the SREBP1c/Fasn signaling pathways. In conclusion, VT has great potential as a dietary supplement to ameliorate glucose and lipid metabolic disorders via the Akt signaling pathway in T2D rats.
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Affiliation(s)
- Jiamei Xiang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China.
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing 100193, China.
| | - Qiuyue Lv
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China.
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing 100193, China.
| | - Fan Yi
- Key Laboratory of Cosmetic, China National Light Industry, Beijing Technology and Business University, Beijing 100048, China.
| | - Yanjun Song
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China.
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing 100193, China.
| | - Liang Le
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China.
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing 100193, China.
| | - Baoping Jiang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China.
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing 100193, China.
| | - Lijia Xu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China.
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing 100193, China.
| | - Peigen Xiao
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China.
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing 100193, China.
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Zhou J, Wu Y, Long P, Ho CT, Wang Y, Kan Z, Cao L, Zhang L, Wan X. LC-MS-Based Metabolomics Reveals the Chemical Changes of Polyphenols during High-Temperature Roasting of Large-Leaf Yellow Tea. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:5405-5412. [PMID: 30485095 DOI: 10.1021/acs.jafc.8b05062] [Citation(s) in RCA: 96] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Large-leaf yellow tea (LYT) is made from mature tea leaves with stems and has unique sensory characteristics different from other teas. To study the chemical changes of LYT during processing, samples were collected from each step for quantitative and qualitative analyses by high-performance liquid chromatography and liquid chromatography-mass spectrometry (LC-MS). LC-MS-based nontargeted and targeted metabolomics analyses revealed that the tea sample after roasting was markedly different from samples before roasting, with the levels of epicatechins and free amino acids significantly decreased, but the epimerized catechins increased dramatically. After accounting for common compounds in tea, N-ethyl-2-pyrrolidinone-substituted flavan-3-ols were found to be the marker compounds responsible for the classification of all samples, as they rapidly rose with increasing processing temperature. These findings suggested that the predominant changes in the tea constituents during large-leaf yellow tea roasting were the thermally induced degradation and epimerization of catechins and the formation of N-ethyl-2-pyrrolidinone-substituted flavan-3-ols from l-theanine.
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Affiliation(s)
| | | | | | - Chi-Tang Ho
- Department of Food Science , Rutgers University , New Brunswick , New Jersey , United States
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An R, Sun L, Xiang L, Zhang W, Li Q, Lai X, Wen S, Huo M, Li D, Sun S. Effect of yellowing time on bioactive compounds in yellow tea and their antiproliferative capacity in HepG2 cells. Food Sci Nutr 2019; 7:1838-1847. [PMID: 31139398 PMCID: PMC6526664 DOI: 10.1002/fsn3.1036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Revised: 03/21/2019] [Accepted: 03/27/2019] [Indexed: 12/17/2022] Open
Abstract
Several studies have shown potent antineoplastic effects of tea, which can induce apoptosis and inhibit proliferation of cancer cells. Yellow tea is one of the six major types of tea, and yellowing time, a key factor in its processing, is known to improve its quality and bioactivity. However, the effects of yellowing on the composition of the bioactive substances of tea are poorly understood. We analyzed the biochemical composition and the antioxidant and anticancer activities of the extracts of yellow tea (EYTs) subjected to different yellowing durations. Prolonged yellowing increased the content of water extracts, amino acids, soluble sugars, theaflavins, and nonesterified catechins (p < 0.05, p < 0.01) and decreased that of polyphenols, flavonols, thearubigins, caffeine, GA, and esterified catechins (p < 0.05, p < 0.01). In addition, yellowing also slightly increased the antioxidant capacity of the EYTs, but did not significantly affect their ability to inhibit the proliferation of the hepatocarcinoma HepG2 cells. Mechanistically, the EYTs significantly downregulated the phosphorylation of PI3K and AKT and upregulated the Bax/Bcl-2 ratio in the HepG2 cells. Taken together, the yellowing time influences the bioactive components of yellow tea, and the resulting yellow tea may have more potent antioxidant and anticancer effects.
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Affiliation(s)
- Ran An
- School of Biotechnology and Health SciencesWuyi UniversityJiangmenChina
| | - Lingli Sun
- Guangdong Academy of Agricultural Sciences/Guangdong Key Laboratory of Tea Resources Innovation & UtilizationTea Research InstituteGuangzhouChina
| | - Limin Xiang
- Guangdong Academy of Agricultural Sciences/Guangdong Key Laboratory of Tea Resources Innovation & UtilizationTea Research InstituteGuangzhouChina
| | - Wenji Zhang
- Guangdong Academy of Agricultural Sciences/Guangdong Key Laboratory of Tea Resources Innovation & UtilizationTea Research InstituteGuangzhouChina
| | - Qiuhua Li
- Guangdong Academy of Agricultural Sciences/Guangdong Key Laboratory of Tea Resources Innovation & UtilizationTea Research InstituteGuangzhouChina
| | - Xingfei Lai
- Guangdong Academy of Agricultural Sciences/Guangdong Key Laboratory of Tea Resources Innovation & UtilizationTea Research InstituteGuangzhouChina
| | - Shuai Wen
- School of Biotechnology and Health SciencesWuyi UniversityJiangmenChina
| | - Mengen Huo
- School of Biotechnology and Health SciencesWuyi UniversityJiangmenChina
| | - Dongli Li
- School of Biotechnology and Health SciencesWuyi UniversityJiangmenChina
- International Healthcare Innovation Institute (Jiangmen)JiangmenChina
| | - Shili Sun
- Guangdong Academy of Agricultural Sciences/Guangdong Key Laboratory of Tea Resources Innovation & UtilizationTea Research InstituteGuangzhouChina
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50
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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: 37] [Impact Index Per Article: 7.4] [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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