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Fu C, Xiao Y, Jiang N, Yang Y. Genome-wide identification and molecular evolution of Dof gene family in Camellia oleifera. BMC Genomics 2024; 25:702. [PMID: 39026173 PMCID: PMC11264790 DOI: 10.1186/s12864-024-10622-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Accepted: 07/15/2024] [Indexed: 07/20/2024] Open
Abstract
DNA binding with one finger(Dof) gene family is a class of transcription factors which play an important role on plant growth and development. Genome-wide identification results indicated that there were 45 Dof genes(ColDof) in C.oleifera genome. All 45 ColDof proteins were non-transmembrane and non-secretory proteins. Phosphorylation site analysis showed that biological function of ColDof proteins were mainly realized by phosphorylation at serine (Ser) site. The secondary structure of 44 ColDof proteins was dominated by random coil, and only one ColDof protein was dominated by α-helix. ColDof genes' promoter region contained a variety of cis-acting elements, including light responsive regulators, gibberellin responsive regulators, abscisic acid responsive regulators, auxin responsive regulators and drought induction responsive regulators. The SSR sites analysis showed that the proportion of single nucleotide repeats and the frequency of A/T in ColDof genes were the largest. Non-coding RNA analysis showed that 45 ColDof genes contained 232 miRNAs. Transcription factor binding sites of ColDof genes showed that ColDof genes had 5793 ERF binding sites, 4381 Dof binding sites, 2206 MYB binding sites, 3702 BCR-BPC binding sites. ColDof9, ColDof39 and ColDof44 were expected to have the most TFBSs. The collinearity analysis showed that there were 40 colinear locis between ColDof proteins and AtDof proteins. Phylogenetic analysis showed that ColDof gene family was most closely related to that of Camellia sinensis var. sinensis cv.Biyun and Camellia lanceoleosa. Protein-protein interaction analysis showed that ColDof34, ColDof20, ColDof28, ColDof35, ColDof42 and ColDof26 had the most protein interactions. The transcriptome analysis of C. oleifera seeds showed that 21 ColDof genes were involved in the growth and development process of C. oleifera seeds, and were expressed in 221 C. oleifera varieties. The results of qRT-PCR experiments treated with different concentrations NaCl and PEG6000 solutions indicated that ColDof1, ColDof2, ColDof14 and ColDof36 not only had significant molecular mechanisms for salt stress tolerance, but also significant molecular functions for drought stress tolerance in C. oleifera. The results of this study provide a reference for further understanding of the function of ColDof genes in C.oleifera.
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Affiliation(s)
- Chun Fu
- Key Laboratory of Sichuan Province for Bamboo Pests Control and Resource Development, Leshan Normal University, No. 778 Binhe Road, Shizhong District, Leshan, Sichuan, 614000, China.
- College of Life Science, Leshan Normal University, No. 778 Binhe Road, Shizhong District, Leshan, Sichuan, 614000, China.
| | - YuJie Xiao
- Key Laboratory of Sichuan Province for Bamboo Pests Control and Resource Development, Leshan Normal University, No. 778 Binhe Road, Shizhong District, Leshan, Sichuan, 614000, China
- College of Life Science, Leshan Normal University, No. 778 Binhe Road, Shizhong District, Leshan, Sichuan, 614000, China
| | - Na Jiang
- College of Tourism and Geographical Science, Leshan Normal University, No. 778 Binhe Road, Shizhong District, Leshan, Sichuan, 614000, China
| | - YaoJun Yang
- Key Laboratory of Sichuan Province for Bamboo Pests Control and Resource Development, Leshan Normal University, No. 778 Binhe Road, Shizhong District, Leshan, Sichuan, 614000, China
- College of Life Science, Leshan Normal University, No. 778 Binhe Road, Shizhong District, Leshan, Sichuan, 614000, China
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2
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Xu S, Chen Y, Gong Y. Improvement of Theaflavins on Glucose and Lipid Metabolism in Diabetes Mellitus. Foods 2024; 13:1763. [PMID: 38890991 PMCID: PMC11171799 DOI: 10.3390/foods13111763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2024] [Revised: 05/28/2024] [Accepted: 06/03/2024] [Indexed: 06/20/2024] Open
Abstract
In diabetes mellitus, disordered glucose and lipid metabolisms precipitate diverse complications, including nonalcoholic fatty liver disease, contributing to a rising global mortality rate. Theaflavins (TFs) can improve disorders of glycolipid metabolism in diabetic patients and reduce various types of damage, including glucotoxicity, lipotoxicity, and other associated secondary adverse effects. TFs exert effects to lower blood glucose and lipids levels, partly by regulating digestive enzyme activities, activation of OATP-MCT pathway and increasing secretion of incretins such as GIP. By the Ca2+-CaMKK ꞵ-AMPK and PI3K-AKT pathway, TFs promote glucose utilization and inhibit endogenous glucose production. Along with the regulation of energy metabolism by AMPK-SIRT1 pathway, TFs enhance fatty acids oxidation and reduce de novo lipogenesis. As such, the administration of TFs holds significant promise for both the prevention and amelioration of diabetes mellitus.
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Affiliation(s)
- Shiyu Xu
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Changsha 410128, China;
- Key Laboratory of Tea Science of Ministry of Education, Changsha 410128, China
| | - Ying Chen
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Changsha 410128, China;
- Key Laboratory of Tea Science of Ministry of Education, Changsha 410128, China
| | - Yushun Gong
- Co-Innovation Center of Education Ministry 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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3
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Liu J, Wang X, Zhu Y, Deng H, Huang X, Jayavanth P, Xiao Y, Wu J, Jiao R. Theabrownin from Dark Tea Ameliorates Insulin Resistance via Attenuating Oxidative Stress and Modulating IRS-1/PI3K/Akt Pathway in HepG2 Cells. Nutrients 2023; 15:3862. [PMID: 37764646 PMCID: PMC10536292 DOI: 10.3390/nu15183862] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 08/26/2023] [Accepted: 08/28/2023] [Indexed: 09/29/2023] Open
Abstract
Dark tea has great potential in regulating glycolipid metabolism, and theabrownin (TB) is considered to be the characteristic and bioactive constituent of dark tea. This study evaluated the ability of TB1 (fermented for 7 days) and TB2 (fermented for 14 days) isolated from dark tea to reverse insulin resistance (IR) in HepG2 cells. The results indicated that TB significantly ameliorated oxidative stress by improving mitochondrial function. In addition, TB improved glycogen synthesis and glucose consumption, and inhibited gluconeogenesis and fatty acid synthesis, by regulating GSK3β (Glycogen synthase kinase 3β), G6Pase (Glucose-6-phosphatase), GCK (Glucokinase), PEPCK1 (Phosphoenolpyruvate carboxy kinase 1), SREBP-1C (sterol regulatory element-binding protein 1C), FASN (fatty acid synthase), and ACC (Acetyl-CoA carboxylase). Additionally, the results of Western blot and real-time PCR experiments demonstrated that TB modulated glucolipid metabolism through the IRS-1 (Insulin receptor substrate 1)/PI3K (phosphatidylinositol-3 kinase)/Akt (protein kinase B) signaling pathway. Treatment with the PI3K inhibitor demonstrated a favorable correlation between PI3K activation and TB action on glycolipid metabolism. Notably, we observed that TB2 had a greater effect on improving insulin resistance compared with TB1, which, due to its prolonged fermentation time, increased the degree of oxidative polymerization of TB.
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Affiliation(s)
- Jia Liu
- Department of Food Science and Engineering, Institute of Science and Technology, Jinan University, Guangzhou 510632, China; (J.L.); (Y.Z.); (H.D.); (X.H.)
| | - Xuan Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Taipa 999078, China; (X.W.); (J.W.)
| | - Yuanqin Zhu
- Department of Food Science and Engineering, Institute of Science and Technology, Jinan University, Guangzhou 510632, China; (J.L.); (Y.Z.); (H.D.); (X.H.)
| | - Huilin Deng
- Department of Food Science and Engineering, Institute of Science and Technology, Jinan University, Guangzhou 510632, China; (J.L.); (Y.Z.); (H.D.); (X.H.)
| | - Xin Huang
- Department of Food Science and Engineering, Institute of Science and Technology, Jinan University, Guangzhou 510632, China; (J.L.); (Y.Z.); (H.D.); (X.H.)
| | - Pallavi Jayavanth
- International School, Jinan University, 601 Huangpu Road, Guangzhou 510632, China;
| | - Ying Xiao
- Faculty of Medicine, Macau University of Science and Technology, Taipa 999078, China;
| | - Jianlin Wu
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Taipa 999078, China; (X.W.); (J.W.)
| | - Rui Jiao
- Department of Food Science and Engineering, Institute of Science and Technology, Jinan University, Guangzhou 510632, China; (J.L.); (Y.Z.); (H.D.); (X.H.)
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4
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Yang CY, Hung KC, Yen YY, Liao HE, Lan SJ, Lin HC. Anti-Oxidative Effect of Pu-erh Tea in Animals Trails: A Systematic Review and Meta-Analysis. Foods 2022; 11:1333. [PMID: 35564056 PMCID: PMC9100797 DOI: 10.3390/foods11091333] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 04/27/2022] [Accepted: 04/29/2022] [Indexed: 02/01/2023] Open
Abstract
This study adopted systematic literature review and meta-analysis methodology to explored anti-oxidative effect of pu-erh tea. Study authors have systemically searched seven databases up until 21 February 2020. In performing the literature search on the above-mentioned databases, the authors used keywords of pu-erh AND (superoxide dismutase OR glutathione peroxidase OR malondialdehyde). Results derived from meta-analyses showed statistically significant effects of pu-erh tea on reducing serum MDA levels (SMD, −4.19; 95% CI, −5.22 to −3.15; p < 0.001; I2 = 93.67%); increasing serum SOD levels (SMD, 2.41; 95% CI, 1.61 to 3.20; p < 0.001; I2 = 91.36%); and increasing serum GSH-Px levels (SMD, 4.23; 95% CI, 3.10 to 5.36; p < 0.001; I2 = 93.69%). Results from systematic review and meta-analyses validated that various ingredients found in pu-erh tea extracts had anti-oxidation effects, a long-held conventional wisdom with limited supporting evidence.
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Affiliation(s)
- Chiung-Ying Yang
- Department of Healthcare Administration, Asia University, Taichung 413, Taiwan; (C.-Y.Y.); (H.-E.L.); (S.-J.L.)
| | - Kuang-Chen Hung
- Taichung Armed Forces General Hospital, Taichung 411, Taiwan;
- National Defense Medical Center, Taipei 114, Taiwan
| | - Yea-Yin Yen
- Department of Oral Hygiene, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan;
| | - Hung-En Liao
- Department of Healthcare Administration, Asia University, Taichung 413, Taiwan; (C.-Y.Y.); (H.-E.L.); (S.-J.L.)
| | - Shou-Jen Lan
- Department of Healthcare Administration, Asia University, Taichung 413, Taiwan; (C.-Y.Y.); (H.-E.L.); (S.-J.L.)
| | - Hsin-Cheng Lin
- Taichung Armed Forces General Hospital, Taichung 411, Taiwan;
- National Defense Medical Center, Taipei 114, Taiwan
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5
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Tanaka T, Yasumatsu M, Hirotani M, Matsuo Y, Li N, Zhu HT, Saito Y, Ishimaru K, Zhang YJ. New degradation mechanism of black tea pigment theaflavin involving condensation with epigallocatechin-3-O-gallate. Food Chem 2022; 370:131326. [PMID: 34656020 DOI: 10.1016/j.foodchem.2021.131326] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 09/05/2021] [Accepted: 10/02/2021] [Indexed: 11/04/2022]
Abstract
Theanaphthoquinone (TNQ) is the initial and main oxidation product of theaflavin, a representative black tea pigment. Nevertheless, TNQ is virtually undetected in the high-performance liquid chromatography analysis of black tea leaves using photodiode array detection. To elucidate the degradation mechanism of theaflavin in the black tea production process, this study investigated the reaction of TNQ with epigallocatechin-3-O-gallate (EGCg), which is the most abundant polyphenol in tea leaves. In citrate-phosphate buffer solution at pH 6 and room temperature, TNQ reacted nonenzymatically with EGCg to afford three products, whose structures were determined on the basis of spectroscopic data. The results indicated that the double bond of the ortho-naphthoquinone moiety in TNQ reacted with the autoxidation product of EGCg. This study demonstrates novel reactions occurring in the process of theaflavin degradation, which might be involved in the formation of thearubigins, the major black tea pigments composing oligomeric catechin oxidation products.
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Affiliation(s)
- Takashi Tanaka
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan.
| | - Miho Yasumatsu
- School of Pharmaceutical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Mayu Hirotani
- School of Pharmaceutical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Yosuke Matsuo
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Na Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Hong-Tao Zhu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Yoshinori Saito
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Kanji Ishimaru
- Department of Applied Biological Sciences, Faculty of Agriculture, Saga University, 1 Honjo, Saga 840-8502, Japan
| | - Ying-Jun Zhang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China.
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6
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Zheng Q, Li W, Gao X. The effect of storage time on tea Polyphenols, catechin compounds, total flavones and the biological activity of Ya’an Tibetan tea (
Camellia sinensis
). J FOOD PROCESS PRES 2021. [DOI: 10.1111/jfpp.16004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Qiaoran Zheng
- School of Advanced Agriculture and Bioengineering Yangtze Normal University Chongqing China
| | - Wenfeng Li
- School of Advanced Agriculture and Bioengineering Yangtze Normal University Chongqing China
| | - Xiaoxv Gao
- School of Advanced Agriculture and Bioengineering Yangtze Normal University Chongqing China
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7
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Wang X, Du G, Chen H, Zeng X, Liu B, Guo C, Sheng Q, Yuan Y, Yue T. Comparative Metagenomics Reveals Microbial Communities and Their Associated Functions in Two Types of Fuzhuan Brick Tea. Front Microbiol 2021; 12:705681. [PMID: 34603231 PMCID: PMC8481837 DOI: 10.3389/fmicb.2021.705681] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 08/19/2021] [Indexed: 12/28/2022] Open
Abstract
Fuzhuan brick tea (FBT) is a unique post-fermented tea product, naturally co-fermented by microorganisms, and has gained global popularity due to its potential health benefits for humans. Considerable efforts have been made toward elucidating the microbial diversity within FBT, but an understanding of the underlying FBT community interactions and functions remains poorly studied. Consequently, the microbial communities of two types of FBT, originating from Hunan and Shaanxi provinces, were investigated using comparative shotgun metagenomic sequencing and functional annotations. Metagenomic analysis indicated that two communities shared similar taxonomic and functional attributes. Two samples shared 486 genera, in which Pseudomonas contributed most to the abundant functions within the two samples. The carbohydrate active enzyme functions of the communities primarily comprised GH (32.92%), GT (26.8%), CEs (20.43%), and AAs (18.04%). Furthermore, the overall metabolic pathways encoded by the metagenomes were largely associated with carbohydrate and amino acid metabolism, with nine metabolic pathways that were differential between two groups including penicillin and cephalosporin biosynthesis. Significantly, a total of 35 potential probiotics were inferred, with Pseudomonas putida being the most abundant inferred probiotic (80%) within the FBT communities. This study provides new insights into FBT microbial communities on their potential functions and roles in FBT characteristics.
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Affiliation(s)
- Xin Wang
- College of Food Science and Engineering, Northwest A&F University, Xianyang, China.,Laboratory of Quality & Safety Risk Assessment for Agro-Products (Yangling), Ministry of Agriculture, Xianyang, China
| | - Gengan Du
- College of Food Science and Engineering, Northwest A&F University, Xianyang, China.,Laboratory of Quality & Safety Risk Assessment for Agro-Products (Yangling), Ministry of Agriculture, Xianyang, China
| | - Hong Chen
- College of Food Science and Engineering, Northwest A&F University, Xianyang, China.,Laboratory of Quality & Safety Risk Assessment for Agro-Products (Yangling), Ministry of Agriculture, Xianyang, China
| | - Xuejun Zeng
- College of Food Science and Engineering, Northwest A&F University, Xianyang, China.,Laboratory of Quality & Safety Risk Assessment for Agro-Products (Yangling), Ministry of Agriculture, Xianyang, China
| | - Bin Liu
- College of Food Science and Engineering, Northwest A&F University, Xianyang, China.,Laboratory of Quality & Safety Risk Assessment for Agro-Products (Yangling), Ministry of Agriculture, Xianyang, China
| | - Chunfeng Guo
- College of Food Science and Engineering, Northwest A&F University, Xianyang, China.,Laboratory of Quality & Safety Risk Assessment for Agro-Products (Yangling), Ministry of Agriculture, Xianyang, China
| | - Qinglin Sheng
- College of Food Science and Technology, Northwest University, Xi'an, China
| | - Yahong Yuan
- College of Food Science and Engineering, Northwest A&F University, Xianyang, China.,Laboratory of Quality & Safety Risk Assessment for Agro-Products (Yangling), Ministry of Agriculture, Xianyang, China
| | - Tianli Yue
- College of Food Science and Engineering, Northwest A&F University, Xianyang, China.,Laboratory of Quality & Safety Risk Assessment for Agro-Products (Yangling), Ministry of Agriculture, Xianyang, China.,College of Food Science and Technology, Northwest University, Xi'an, China
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8
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Li J, Shi L, Xu S, Gu S, Wen X, Xu D, Luo J, Huang Y, Wang M. Optimal fermentation time for Nigrospora-fermented tea rich in bostrycin. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2021; 101:2483-2490. [PMID: 33058154 DOI: 10.1002/jsfa.10874] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Revised: 07/08/2020] [Accepted: 10/15/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Bostrycin has many biological functions, such as anticancer activity, and is becoming increasingly popular. Nigrospora sphaerica HCH285, which has the ability to produce high levels of bostrycin, can be used to ferment sun-dried green tea of Camellia sinensis through acclimation, resulting in the development of a Nigrospora-fermented tea. The effects of fermentation time on the production of bostrycin by the HCH285 strain were investigated. RESULTS After 45 days of fermentation, the bostrycin content reached 3.18 g kg-1 , which is the highest level during the whole fermentation. At 50 days, the tea liquor was red, had a strong mushroom odour and a sweet taste, and presented optimal quality. The contents of free amino acids, tea polyphenols and soluble sugars in the fermented tea decreased generally during the fermentation, although the content of water-soluble substances increased. Additionally, the results of a 14-day acute oral toxicity test showed that Nigrospora-fermented tea was nontoxic. CONCLUSION The optimum fermentation time of Nigrospora-fermented tea was concluded to be 45-50 days. These results provide insights with respect to the development of tea biotechnology and new tea products with active ingredients. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Jinhan Li
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Le Shi
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Shiyao Xu
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Siyi Gu
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Xue Wen
- Ministry of Education Key Laboratory of Horticultural Plant Biology, State Key Laboratory of Agricultural Microbiology, and Tea Science Department of Horticulture and Forestry Science College, Huazhong Agricultural University, Wuhan, China
| | - Danyan Xu
- College of Economics & Management, Huazhong Agricultural University, Wuhan, China
| | - Junyan Luo
- College of Humanity & Law, Huazhong Agricultural University, Wuhan, China
| | - Youyi Huang
- Ministry of Education Key Laboratory of Horticultural Plant Biology, State Key Laboratory of Agricultural Microbiology, and Tea Science Department of Horticulture and Forestry Science College, Huazhong Agricultural University, Wuhan, China
| | - Mo Wang
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
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9
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Abstract
Black tea accounts for 70-80% of world tea production, and the polyphenols therein are produced by enzymatic oxidation of four tea catechins during tea fermentation. However, only limited groups of dimeric oxidation products, such as theaflavins, theasinensins, and theacitrins, have been isolated from black tea and chemically characterized. This is largely because of the complexity and heterogeneity of the oxidation products. To determine structures and production mechanisms of uncharacterized black tea polyphenols, in vitro model fermentation experiments using pure catechins and polyphenol oxidase have been applied, and basic oxidation mechanisms have been established. Contemporary methods, such as LC-MS, are also effective to identify catechin oxidation products in black tea. Despite ongoing efforts, almost 60% of the solids in black tea infusion remain uncharacterized. These compounds include the so-called thearubigins, which are a heterogeneous mixture of uncharacterized catechin oxidation products with oligomeric structures. This review summarizes the current knowledge of the production mechanisms of representative black tea polyphenols and presents recent progress in characterization of thearubigins.
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Affiliation(s)
- Takashi Tanaka
- Graduate School of Biomedical Sciences, Nagasaki University
| | - Yosuke Matsuo
- Graduate School of Biomedical Sciences, Nagasaki University
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10
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Kitakaze T, Jiang H, Nomura T, Hironao KY, Yamashita Y, Ashida H. Kaempferol Promotes Glucose Uptake in Myotubes through a JAK2-Dependent Pathway. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:13720-13729. [PMID: 33197173 DOI: 10.1021/acs.jafc.0c05236] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Kaempferol possesses various health-promoting functions including antihyperglycemic activity, but its underlying molecular mechanism is poorly understood. Glucose transporter 4 (GLUT4) plays an important role in the uptake of blood glucose into muscle cells after its translocation to the plasma membrane. In this study, we demonstrated that kaempferol at 1.0 nM or more significantly increased the uptake of 2-[3H]- deoxy-d-glucose by 1.3-1.4-fold in L6 myotubes. Kaempferol at 10 pM or more also significantly increased GLUT4 translocation by 1.3-1.6-fold. Kaempferol at 1.0 nM significantly increased the phosphorylation of adenosine monophosphate-activated protein kinase (AMPK) by 2.9-fold, liver kinase B1 and Janus kinase 2 (JAK2) by 1.9-fold, and signal transducer and activator of transcription 3 by 3.7-fold. In addition, kaempferol increased phosphorylation of phosphoinositide 3-kinase (PI3K) by 1.8-fold but not the insulin receptor. Small interfering RNA (siRNA) for AMPK, JAK2, or PI3K canceled kaempferol-induced glucose uptake and GLUT4 translocation. Furthermore, siRNA for JAK2 canceled kaempferol-induced phosphorylation of AMPK and PI3K. These results indicate that a JAK2-depdendent pathway regulates kaempferol-induced glucose uptake and GLUT4 translocation in L6 myotubes and that kaempferol may be an effective compound for the prevention of hyperglycemia.
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Affiliation(s)
- Tomoya Kitakaze
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Kobe 657-8501, Japan
| | - Hao Jiang
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Kobe 657-8501, Japan
| | - Takuya Nomura
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Kobe 657-8501, Japan
| | - Ken-Yu Hironao
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Kobe 657-8501, Japan
| | - Yoko Yamashita
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Kobe 657-8501, Japan
| | - Hitoshi Ashida
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Kobe 657-8501, Japan
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11
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Ye Z, Wang X, Fu R, Yan H, Han S, Gerelt K, Cui P, Chen J, Qi K, Zhou Y. Determination of six groups of mycotoxins in Chinese dark tea and the associated risk assessment. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 261:114180. [PMID: 32088438 DOI: 10.1016/j.envpol.2020.114180] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 02/10/2020] [Accepted: 02/11/2020] [Indexed: 06/10/2023]
Abstract
Chinese dark tea is widely enjoyed for its multiple health-promoting effects and pleasant taste. However, its production involves fermentation by microbiota in raw tea, some of which are filamentous fungi and thus potential mycotoxin producers. Accordingly, whether mycotoxins pose health risk on dark tea consumption has become a public concern. In this study, a cleaning method of multi-functional column (MFC) and immunoaffinity column (IAC) in tandem combined to HPLC detection was developed and validated for determining ten mycotoxins of six groups (i.e., aflatoxins of B1, B2, G1 and G2, ochratoxin A, zearalenone, deoxynivalenol, fumonisins of B1, B2, and T-2) in dark teas. The interferences from secondary metabolites were effectively reduced, and the sensitivities and recoveries of the method were qualified for tea matrices. Six groups mycotoxins were determined in 108 samples representing the major Chinese dark teas by using the new method. Subsequently, the dietary exposure and health risks were evaluated for different age and gender groups in Kunming and Pu'er in China and Ulan Bator in Mongolia. The occurrence of zearalenone was 4.63% and that of ochratoxin A was 1.85%, with the other four groups mycotoxins were below the limits of quantification. The hazard index values for the five groups' non-carcinogenic mycotoxins were far below 1.0. The deterministic risk assessment indicated no non-carcinogenic risks for dark tea consumption in the three areas. Probabilistic estimation showed that the maximum value of 95th percentile carcinogenic risk value for the aflatoxins was 2.12 × 10-8, which is far below the acceptable carcinogenic risk level (10-6). Hereby, six groups mycotoxins in Chinese dark tea showed no observed risk concern to consumers.
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Affiliation(s)
- Ziling Ye
- State Key Laboratory of Tea Biology and Utilization, School of Tea and Food Science Technology, Anhui Agricultural University, Heifei 230036, China
| | - Xu Wang
- State Key Laboratory of Tea Biology and Utilization, School of Tea and Food Science Technology, Anhui Agricultural University, Heifei 230036, China
| | - Ruiyan Fu
- State Key Laboratory of Tea Biology and Utilization, School of Tea and Food Science Technology, Anhui Agricultural University, Heifei 230036, China
| | - Hangbin Yan
- State Key Laboratory of Tea Biology and Utilization, School of Tea and Food Science Technology, Anhui Agricultural University, Heifei 230036, China
| | - Sanqing Han
- State Key Laboratory of Tea Biology and Utilization, School of Tea and Food Science Technology, Anhui Agricultural University, Heifei 230036, China
| | - Khishigjargal Gerelt
- State Key Laboratory of Tea Biology and Utilization, School of Tea and Food Science Technology, Anhui Agricultural University, Heifei 230036, China
| | - Pu Cui
- State Key Laboratory of Tea Biology and Utilization, School of Tea and Food Science Technology, Anhui Agricultural University, Heifei 230036, China
| | - Jingjing Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
| | - Kezong Qi
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, China
| | - Yu Zhou
- State Key Laboratory of Tea Biology and Utilization, School of Tea and Food Science Technology, Anhui Agricultural University, Heifei 230036, China; Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, China.
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12
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Zheng Q, Li W, Zhang H, Gao X, Tan S. Optimizing synchronous extraction and antioxidant activity evaluation of polyphenols and polysaccharides from Ya'an Tibetan tea ( Camellia sinensis). Food Sci Nutr 2020; 8:489-499. [PMID: 31993173 PMCID: PMC6977498 DOI: 10.1002/fsn3.1331] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Accepted: 10/29/2019] [Indexed: 01/17/2023] Open
Abstract
The optimal synchronous conditions to extract tea polysaccharides (TPS) and tea polyphenols (TPP) from Ya'an Tibetan tea were investigated, and the antioxidative capacity of TPS and TPP was measured, and the tea was analyzed to identify the polyphenol compounds it contained. On the basis of single-factor experiments, a Box-Behnken design and response surface methodology were applied to optimize the hot water extraction conditions. The optimal extraction technology was determined as extraction temperature of 83°C, time of 104 min, and liquid-to-material ratio of 41 ml/g, yielding TPP and TPS at 42.70 ± 2.38 mg/g and 53.86 ± 3.79 mg/g, respectively. The TPS and TPP in Ya'an Tibetan tea have high eliminating activities on DPPH and strong reducing power, with TPP showing a higher antioxidant activity than TPS. UHPLC-QqQ-MS/MS analysis identified EGCG, GCG, and ECG as major polyphenol components in Ya'an Tibetan tea. These findings might promote the application of Ya'an Tibetan tea in the food industry.
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Affiliation(s)
- Qiaoran Zheng
- School of Advanced Agriculture and BioengineeringYangtze Normal UniversityChongqingChina
| | - Wenfeng Li
- School of Advanced Agriculture and BioengineeringYangtze Normal UniversityChongqingChina
| | - Heng Zhang
- Drug Control InstitutionsYa'an Polytechnic CollegeSiChuanChina
| | - Xiaoxu Gao
- School of Advanced Agriculture and BioengineeringYangtze Normal UniversityChongqingChina
| | - Si Tan
- School of Advanced Agriculture and BioengineeringYangtze Normal UniversityChongqingChina
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13
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Wang X, Jiang H, Zhang N, Cai C, Li G, Hao J, Yu G. Anti-diabetic activities of agaropectin-derived oligosaccharides from Gloiopeltis furcata via regulation of mitochondrial function. Carbohydr Polym 2019; 229:115482. [PMID: 31826412 DOI: 10.1016/j.carbpol.2019.115482] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 10/13/2019] [Accepted: 10/15/2019] [Indexed: 12/20/2022]
Abstract
The aim of the present study was to investigate whether agaropectin-derived oligosaccharides from Gloiopeltis furcata (SAOs) exert an anti-diabetic effect in sodium palmitate (PA)-induced insulin resistant HepG2 cells. We found that SAOs were co-localized with mitochondria and regulated mitochondrial function. SAOs reduced respiratory chain activities, which led to reduced respiratory oxygen consumption and increased the cellular ADP/ATP ratio in a certain degree of dose-dependent manner. Thus, SAOs alleviated the oxidative stress state in PA-treated cells and, moreover, concurrently regulated the ROS-JNK-IRS-1 pathway. As a result, SAOs enhanced insulin sensitivity and glucose metabolism by activating the IRS-1-AKT-GSK-3β-GS pathway. Additionally, SAOs activated AMPK through both PKA-LKB1 and mitochondrial-regulated energy metabolism pathways. Therefore, SAOs decreased accumulation of lipids and improved lipid metabolism via regulating HMGCR, ACC and SREBP-1 proteins in HepG2 cells. Taken together, we conclude that SAOs could significantly ameliorate diabetic states in vitro via regulating mitochondria and their downstream signaling pathways.
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Affiliation(s)
- Xueliang Wang
- Key Laboratory of Marine Drugs of Ministry of Education, Shandong Provincial Key Laboratory of Glycoscience and Glycotechnology, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237, China
| | - Hao Jiang
- Key Laboratory of Marine Drugs of Ministry of Education, Shandong Provincial Key Laboratory of Glycoscience and Glycotechnology, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237, China
| | - Ning Zhang
- Key Laboratory of Marine Drugs of Ministry of Education, Shandong Provincial Key Laboratory of Glycoscience and Glycotechnology, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237, China
| | - Chao Cai
- Key Laboratory of Marine Drugs of Ministry of Education, Shandong Provincial Key Laboratory of Glycoscience and Glycotechnology, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237, China
| | - Guoyun Li
- Key Laboratory of Marine Drugs of Ministry of Education, Shandong Provincial Key Laboratory of Glycoscience and Glycotechnology, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237, China
| | - Jiejie Hao
- Key Laboratory of Marine Drugs of Ministry of Education, Shandong Provincial Key Laboratory of Glycoscience and Glycotechnology, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237, China.
| | - Guangli Yu
- Key Laboratory of Marine Drugs of Ministry of Education, Shandong Provincial Key Laboratory of Glycoscience and Glycotechnology, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237, China.
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14
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Ye Z, Cui P, Wang Y, Yan H, Wang X, Han S, Zhou Y. Simultaneous Determination of Four Aflatoxins in Dark Tea by Multifunctional Purification Column and Immunoaffinity Column Coupled to Liquid Chromatography Tandem Mass Spectrometry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:11481-11488. [PMID: 31545895 DOI: 10.1021/acs.jafc.9b04933] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Dry tea matrix contains an abundance of caffeine and polyphenols which are different from the food matrix (e.g., protein, lipid, and carbohydrates), and only a few studies have tried aflatoxins determination with tea samples. Here, a specific, accurate, and sensitive method was developed and validated for the simultaneous determination of aflatoxin B1, B2, G1, and G2 in dark teas. Aflatoxins were extracted by acetonitrile/water, press-filtered, and cleaned by multifunctional purification column (MFC) and immunoaffinity column (IAC) in tandem. The cleaned extract was analyzed by liquid chromatography tandem mass spectrometry. The matrix interference was effectively reduced by MFC-IAC cleaning method. Recoveries at the spiking concentrations of 5-60 μg/kg ranged from 77.5 to 93%, with relative standard deviations <11.0%. The correlation coefficients of aflatoxins standard were >0.998. The limits of detection were 0.024-0.21 μg/kg and the limits of quantification were 0.08-0.74 μg/kg. The intra- and interday accuracy ranged from 74 to 87%, and the intra- and interday precisions ranged from 0.4 to 3.1%. After the method validation, the aflatoxins contaminations in 100 collected dark teas were detected, and the results were compared with those of other methods.
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Affiliation(s)
- Ziling Ye
- State Key Laboratory of Tea Biology and Utilization, School of Tea and Food Science Technology , Anhui Agricultural University , Heifei 230036 , China
- Shanghai Key Laboratory of Bio-Energy Crops , Shanghai University , Shanghai 200444 , China
| | - Pu Cui
- School of Life and Environmental Sciences , Huangshan University , Huangshan 245041 , China
- Shanghai Key Laboratory of Bio-Energy Crops , Shanghai University , Shanghai 200444 , China
| | - Yong Wang
- School of Life and Environmental Sciences , Huangshan University , Huangshan 245041 , China
| | - Hangbin Yan
- State Key Laboratory of Tea Biology and Utilization, School of Tea and Food Science Technology , Anhui Agricultural University , Heifei 230036 , China
| | - Xu Wang
- State Key Laboratory of Tea Biology and Utilization, School of Tea and Food Science Technology , Anhui Agricultural University , Heifei 230036 , China
| | - Sanqing Han
- State Key Laboratory of Tea Biology and Utilization, School of Tea and Food Science Technology , Anhui Agricultural University , Heifei 230036 , China
| | - Yu Zhou
- State Key Laboratory of Tea Biology and Utilization, School of Tea and Food Science Technology , Anhui Agricultural University , Heifei 230036 , China
- Shanghai Key Laboratory of Bio-Energy Crops , Shanghai University , Shanghai 200444 , China
- State Key Laboratory of Food Science and Technology , Jiangnan University , Wuxi 214122 , People's Republic of China
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15
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Francini F, Schinella GR, Ríos JL. Activation of AMPK by Medicinal Plants and Natural Products: Its Role in Type 2 Diabetes Mellitus. Mini Rev Med Chem 2019; 19:880-901. [PMID: 30484403 DOI: 10.2174/1389557519666181128120726] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 07/04/2018] [Accepted: 11/22/2018] [Indexed: 12/26/2022]
Abstract
Type-2 Diabetes (T2D) is a metabolic disease characterized by permanent hyperglycemia, whose development can be prevented or delayed by using therapeutic agents and implementing lifestyle changes. Some therapeutic alternatives include regulation of glycemia through modulation of different mediators and enzymes, such as AMP-activated protein kinase (AMPK), a highly relevant cellular energy sensor for metabolic homeostasis regulation, with particular relevance in the modulation of liver and muscle insulin sensitivity. This makes it a potential therapeutic target for antidiabetic drugs. In fact, some of them are standard drugs used for treatment of T2D, such as biguanides and thiazolidindiones. In this review, we compile the principal natural products that are activators of AMPK and their effect on glucose metabolism, which could make them candidates as future antidiabetic agents. Phenolics such as flavonoids and resveratrol, alkaloids such as berberine, and some saponins are potential natural activators of AMPK with a potential future as antidiabetic drugs.
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Affiliation(s)
- Flavio Francini
- Centro de Endocrinologia Experimental y Aplicada, (CONICET-CCT La Plata-UNLP FCM, CEAS CICPBA), Argentina
| | - Guillermo R Schinella
- Cátedra de Farmacología Básica, Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Argentina.,Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, La Plata, Argentina
| | - José-Luis Ríos
- Departament de Farmacologia, Facultat de Farmacia, Universitat de Valencia, Valencia, Spain
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16
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Green Tea Ameliorates Hyperglycemia by Promoting the Translocation of Glucose Transporter 4 in the Skeletal Muscle of Diabetic Rodents. Int J Mol Sci 2019; 20:ijms20102436. [PMID: 31100973 PMCID: PMC6566303 DOI: 10.3390/ijms20102436] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 04/28/2019] [Accepted: 05/14/2019] [Indexed: 12/27/2022] Open
Abstract
It is known that green tea helps prevent obesity and diabetes mellitus. In this study, we aimed to determine whether green tea ameliorates hyperglycemia and the mechanism involved in diabetic rodents. Green tea consumption reduced blood glucose and ameliorated glucose intolerance, which was assessed using an oral glucose tolerance test in both streptozotocin-induced type 1 diabetic rats and type 2 diabetic KK-Ay mice. Green tea also reduced the plasma fructosamine and glycated hemoglobin concentrations in both models. Furthermore, it increased glucose uptake into the skeletal muscle of both model animals, which was accompanied by greater translocation of glucose transporter 4 (GLUT4). Moreover, epigallocatechin gallate (EGCG), the principal catechin in green tea, also ameliorated glucose intolerance in high-fat diet-induced obese and diabetic mice. These results suggest that green tea can ameliorate hyperglycemia in diabetic rodents by stimulating GLUT4-mediated glucose uptake in skeletal muscle, and that EGCG is one of the effective compounds that mediate this effect.
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17
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Yang CS, Zhang J. Studies on the Prevention of Cancer and Cardiometabolic Diseases by Tea: Issues on Mechanisms, Effective Doses, and Toxicities. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:5446-5456. [PMID: 30541286 DOI: 10.1021/acs.jafc.8b05242] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
This article presents a brief overview of studies on the prevention of cancer and cardiometabolic diseases by tea. The major focus is on green tea catechins concerning the effective doses used, the mechanisms of action, and possible toxic effects. In cancer prevention by tea, the laboratory results are strong; however, the human data are inconclusive, and the effective doses used in some human trials approached toxic levels. In studies of the alleviation of metabolic syndrome, diabetes, and prevention of cardiovascular diseases, the results from human studies are stronger in individuals who consume 3-4 cups of tea (600-900 mg of catechins) or more per day. The tolerable upper intake level of tea catechins has been set at 300 mg of (-)-epigallocatechin-3-gallate in a bolus dose per day in some European countries. The effects of doses and dosage forms on catechin toxicity, the mechanisms involved, and factors that may affect toxicity are discussed.
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Affiliation(s)
- Chung S Yang
- Department of Chemical Biology, Ernest Mario School of Pharmacy , Rutgers, The State University of New Jersey , 164 Frelinghuysen Road , Piscataway , New Jersey 08854-8020 , United States
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18
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Casanova E, Salvadó J, Crescenti A, Gibert-Ramos A. Epigallocatechin Gallate Modulates Muscle Homeostasis in Type 2 Diabetes and Obesity by Targeting Energetic and Redox Pathways: A Narrative Review. Int J Mol Sci 2019; 20:ijms20030532. [PMID: 30691224 PMCID: PMC6387143 DOI: 10.3390/ijms20030532] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 01/22/2019] [Indexed: 12/20/2022] Open
Abstract
Obesity is associated with the hypertrophy and hyperplasia of adipose tissue, affecting the healthy secretion profile of pro- and anti-inflammatory adipokines. Increased influx of fatty acids and inflammatory adipokines from adipose tissue can induce muscle oxidative stress and inflammation and negatively regulate myocyte metabolism. Muscle has emerged as an important mediator of homeostatic control through the consumption of energy substrates, as well as governing systemic signaling networks. In muscle, obesity is related to decreased glucose uptake, deregulation of lipid metabolism, and mitochondrial dysfunction. This review focuses on the effect of epigallocatechin-gallate (EGCG) on oxidative stress and inflammation, linked to the metabolic dysfunction of skeletal muscle in obesity and their underlying mechanisms. EGCG works by increasing the expression of antioxidant enzymes, by reversing the increase of reactive oxygen species (ROS) production in skeletal muscle and regulating mitochondria-involved autophagy. Moreover, EGCG increases muscle lipid oxidation and stimulates glucose uptake in insulin-resistant skeletal muscle. EGCG acts by modulating cell signaling including the NF-κB, AMP-activated protein kinase (AMPK), and mitogen-activated protein kinase (MAPK) signaling pathways, and through epigenetic mechanisms such as DNA methylation and histone acetylation.
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Affiliation(s)
- Ester Casanova
- Nutrigenomics Research Group, Department of Biochemistry and Biotechnology, Universitat Rovira i Virgili (URV), Campus Sescelades, 43007 Tarragona, Spain.
| | - Josepa Salvadó
- Nutrigenomics Research Group, Department of Biochemistry and Biotechnology, Universitat Rovira i Virgili (URV), Campus Sescelades, 43007 Tarragona, Spain.
| | - Anna Crescenti
- Technological Unit of Nutrition and Health, EURECAT-Technology Centre of Catalonia, Avinguda Universitat 1, 43204 Reus, Spain.
| | - Albert Gibert-Ramos
- Nutrigenomics Research Group, Department of Biochemistry and Biotechnology, Universitat Rovira i Virgili (URV), Campus Sescelades, 43007 Tarragona, Spain.
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Cacao liquor procyanidins prevent postprandial hyperglycaemia by increasing glucagon-like peptide-1 activity and AMP-activated protein kinase in mice. J Nutr Sci 2019; 8:e2. [PMID: 30719284 PMCID: PMC6344835 DOI: 10.1017/jns.2018.28] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 11/13/2018] [Accepted: 11/30/2018] [Indexed: 12/20/2022] Open
Abstract
Procyanidins have been reported to possess potential for the prevention of hyperglycaemia. However, there are very few data for procyanidins about the difference the degree of polymerisation (DP) has on anti-hyperglycaemic effects. Moreover, the underlying molecular mechanisms by which procyanidins suppress hyperglycaemia are not yet fully understood. In the present study, we prepared procyanidin fractions with different DP, namely low-DP (DP≤3) and high-DP (DP≥4) fractions, from a cacao liquor procyanidin-rich extract (CLPr). These fractions were administered orally to Institute of Cancer Research (ICR) mice and their anti-hyperglycaemic effects were examined. We found that CLPr and its fractions prevent postprandial hyperglycaemia accompanied by an increase in the plasma glucagon-like peptide-1 (GLP-1) level with or without glucose load. In the absence of glucose load, both fractions increased the plasma insulin level and activated its downstream signalling pathway in skeletal muscle, resulting in promotion of the translocation of GLUT4. Phosphorylation of AMP-activated protein kinase (AMPK) was also involved in the promotion of GLUT4 translocation. High- and low-DP fractions showed a similar activation of insulin and AMPK pathways. In conclusion, cacao liquor procyanidins prevent hyperglycaemia by promoting GLUT4 translocation in skeletal muscle, and both the GLP-1-activated insulin pathway and the AMPK pathway are involved in the underlying molecular mechanism.
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20
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Xu L, Li W, Chen Z, Guo Q, Wang C, Santhanam RK, Chen H. Inhibitory effect of epigallocatechin-3-O-gallate on α-glucosidase and its hypoglycemic effect via targeting PI3K/AKT signaling pathway in L6 skeletal muscle cells. Int J Biol Macromol 2018; 125:605-611. [PMID: 30529552 DOI: 10.1016/j.ijbiomac.2018.12.064] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 12/05/2018] [Accepted: 12/06/2018] [Indexed: 12/28/2022]
Abstract
Epigallocatechin-3-O-gallate (EGCG), a tea polyphenol is renowned for its anti-diabetic properties, however limited studies elucidate its hypoglycemic mechanism from multi-perspectives. In the present study, the interaction between EGCG and α-glucosidase was investigated through kinetics analysis, fluorescence spectra, Fourier transform infrared (FT-IR) spectra and molecular docking studies. Additionally, the effect of EGCG on glucose uptake and its related signaling pathway in L6 muscle cells were also investigated. The results showed that the α-glucosidase inhibitory activity of EGCG (IC50 = 19.5 ± 0.3 μM) was higher than that acarbose (IC50 = 278.7 ± 1.1 μM). EGCG inhibited α-glucosidase in a reversible and non-competitive manner. EGCG quenched the fluorescence of α-glucosidase due to the complex formation between EGCG and α-glucosidase, where the hydrogen bonds played a critical role. Microenvironment and the secondary structure of α-glucosidase were highly influenced by EGCG. Molecular docking results indicated that the binding sites on α-glucosidase for EGCG were close to the active site pocket of the enzyme. EGCG was also found to enhance the glucose uptake and promote GLUT4 translocation to plasma membrane via PI3K/AKT signaling pathway in L6 skeletal muscle cells. Overall, these results revealed the possible hypoglycemic mechanism of EGCG.
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Affiliation(s)
- Leilei Xu
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, PR China
| | - Weiwei Li
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, PR China
| | - Zhongqin Chen
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, PR China
| | - Qingwen Guo
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, PR China
| | - Chunli Wang
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, PR China
| | - Ramesh Kumar Santhanam
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, PR China
| | - Haixia Chen
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, PR China.
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21
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Lin HC, Lee CT, Yen YY, Chu CL, Hsieh YP, Yang CS, Lan SJ. Systematic review and meta-analysis of anti-hyperglycaemic effects of Pu-erh tea. Int J Food Sci Technol 2018. [DOI: 10.1111/ijfs.13966] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Hsin-Cheng Lin
- Department of Healthcare Administration; Asia University; Taiwan No.500, Lioufeng Rd. Wufeng Taichung 41354 Taiwan
- Taichung Armed Forces General Hospital, Taichung; Taiwan No.348, Sec. 2, Zhongshan Rd., Taiping Dist. Taichung City 411 Taiwan
- National Defense Medical Center, Taipei; Taiwan No.161, Sec. 6, Minquan E. Rd., Neihu Dist. Taipei City 11490 Taiwan
| | - Chien-Tai Lee
- Tsaotun psychiatric center ministry of Health and Welfare, Nantou; Taiwan No.161, Yuping Rd., Caotun Township Nantou County 542 Taiwan
| | - Yea-Yin Yen
- Department of Oral Hygiene; College of Dental Medicine; Kaohsiung Medical University; Taiwan No.100, Shih-Chuan 1st Road Kaohsiung 80708 Taiwan
| | - Chiao-Lee Chu
- Department of Long Term Care; National Quemoy University, Kinmen County; Taiwan No. 1, University Rd., Jinning Township Kinmen County 892 Taiwan
| | - Yen-Ping Hsieh
- Department of Long Term Care; National Quemoy University, Kinmen County; Taiwan No. 1, University Rd., Jinning Township Kinmen County 892 Taiwan
| | - Chi-Sheng Yang
- Department of Healthcare Administration; Asia University; Taiwan No.500, Lioufeng Rd. Wufeng Taichung 41354 Taiwan
| | - Shou-Jen Lan
- Department of Healthcare Administration; Asia University; Taiwan No.500, Lioufeng Rd. Wufeng Taichung 41354 Taiwan
- Department of Medical Research; China Medical University Hospital; China Medical University, Taichung; Taiwan No.91, Hsueh-Shih Road Taichung 40402 Taiwan
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22
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Yamashita Y, Kishida H, Nakagawa K, Yoshioka Y, Ashida H. Liquorice flavonoid oil suppresses hyperglycaemia accompanied by skeletal muscle myocellular GLUT4 recruitment to the plasma membrane in KK-Ay mice. Int J Food Sci Nutr 2018; 70:294-302. [DOI: 10.1080/09637486.2018.1508425] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Yoko Yamashita
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Kobe, Japan
| | - Hideyuki Kishida
- Biotechnology Research Laboratories, Kaneka Corporation Takasago, Hyogo, Japan
| | - Kaku Nakagawa
- Supplemental Nutrition Business Division, Pharma & Supplemental Nutrition Solutions Vehicle, Kaneka Corporation, Osaka, Japan
| | - Yasukiyo Yoshioka
- Graduate School of Science, Technology and Innovation Kobe University, Kobe, Japan
| | - Hitoshi Ashida
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Kobe, Japan
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23
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Rothenberg DO, Zhou C, Zhang L. A Review on the Weight-Loss Effects of Oxidized Tea Polyphenols. Molecules 2018; 23:E1176. [PMID: 29758009 PMCID: PMC6099746 DOI: 10.3390/molecules23051176] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 05/06/2018] [Accepted: 05/09/2018] [Indexed: 12/16/2022] Open
Abstract
The mechanistic systems in the body through which tea causes weight loss are complex and multi-dimensional. Additionally, the bioactive components in tea such as catechins, caffeine, and products of tea polyphenol oxidation vary greatly from one major tea type to the next. Green tea has been the primary subject of consideration for investigation into the preventative health effects of tea because it contains the highest levels of phenolic compounds and retains the highest antioxidant capabilities of any major tea type. However, recent research suggests decreasing body fat accumulation has little to do with antioxidant activity and more to do with enzyme inhibition, and gut microbiota interactions. This paper reviews several different tea polyphenol-induced weight-loss mechanisms, and purposes a way in which these mechanisms may be interrelated. Our original 'short-chain fatty acid (SCFA) hypothesis' suggests that the weight-loss efficacy of a given tea is determined by a combination of carbohydrate digestive enzyme inhibition and subsequent reactions of undigested carbohydrates with gut microbiota. These reactions among residual carbohydrates, tea polyphenols, and gut microbiota within the colon produce short-chain fatty acids, which enhance lipid metabolism through AMP-activated protein kinase (AMPK) activation. Some evidence suggests the mechanisms involved in SCFA generation may be triggered more strongly by teas that have undergone fermentation (black, oolong, and dark) than by non-fermented (green) teas. We discussed the mechanistic differences among fermented and non-fermented teas in terms of enzyme inhibition, interactions with gut microbiota, SCFA generation, and lipid metabolism. The inconsistent results and possible causes behind them are also discussed.
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Affiliation(s)
| | - Caibi Zhou
- Department of Tea Science, Qiannan Normal University for Nationalities, Duyun 558000, China.
| | - Lingyun Zhang
- College of Horticulture Science, South China Agricultural University, Guangzhou 510640, China.
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24
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Yang CS, Wang H, Sheridan ZP. Studies on prevention of obesity, metabolic syndrome, diabetes, cardiovascular diseases and cancer by tea. J Food Drug Anal 2017; 26:1-13. [PMID: 29389543 PMCID: PMC9332647 DOI: 10.1016/j.jfda.2017.10.010] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 10/26/2017] [Accepted: 10/31/2017] [Indexed: 12/16/2022] Open
Abstract
Tea, a popular beverage made from leaves of the plant Camellia sinensis, has been studied extensively in recent decades for its beneficial health effects in the prevention of obesity, metabolic syndrome, diabetes, cancer, and other diseases. Whereas these beneficial effects have been convincingly demonstrated in most laboratory studies, results from human studies have not been consistent. Some studies demonstrated that weight reduction, alleviation of metabolic syndrome and risk reduction in diabetes were only observed in individuals who consume 3-4 cups of tea (600-900 mg tea catechins) or more daily. This chapter reviews some of these studies, the possible mechanisms of actions of tea constituents, and the challenges in extrapolating laboratory studies to human situations.
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Affiliation(s)
- Chung Shu Yang
- Corresponding author. Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, 164 Frelinghuysen Road, Piscataway, NJ 08854-8020, USA. Fax: +1 732 445 0687. E-mail address: (C.S. Yang)
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Yang X, Huang M, Qin C, Lv B, Mao Q, Liu Z. Structural characterization and evaluation of the antioxidant activities of polysaccharides extracted from Qingzhuan brick tea. Int J Biol Macromol 2017; 101:768-775. [PMID: 28373046 DOI: 10.1016/j.ijbiomac.2017.03.189] [Citation(s) in RCA: 93] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 03/05/2017] [Accepted: 03/30/2017] [Indexed: 01/23/2023]
Abstract
The crude tea polysaccharides (CTPS) from Qingzhuan brick tea(QZBT) were extracted and fractionated to afford two fractions, namely TPS-1 and TPS-2. Analyses were conducted concerning the structural characterization and antioxidant activities of these samples. Component analysis revealed that the carbohydrate, uronic acid, protein and polyphenol contents of these samples differed significantly. Fourier transform infrared analysis showed that these samples showed similar characteristic absorption peaks for polysaccharides. Ultraviolet-visible spectroscopy, circular dichroism, scanning electron microscopy and thermogravimetric analyses indicated that there were considerable differences in the presence of protein, surface features, conformational characteristics and thermodynamic behaviors. For antioxidant activities in vitro, CTPS, TPS-1 and TPS-2 exhibited concentration-dependent antioxidant activities, with TPS-2 showing significantly higher antioxidant activity than CTPS and TPS-1. These results provide a scientific and strong foundation for the use of tea polysaccharides(TPS) from QZBT and further research towards the relationships between the characteristics and antioxidant activities of TPS.
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Affiliation(s)
- Xinhe Yang
- Hubei Provincial Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Hubei Engineering University, Xiaogan, Hubei 432000, PR China.
| | - Mingjun Huang
- Hubei Provincial Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Hubei Engineering University, Xiaogan, Hubei 432000, PR China
| | - Caiqin Qin
- Hubei Provincial Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Hubei Engineering University, Xiaogan, Hubei 432000, PR China
| | - Bangyu Lv
- Hubei Provincial Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Hubei Engineering University, Xiaogan, Hubei 432000, PR China
| | - Qingli Mao
- Hubei Provincial Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Hubei Engineering University, Xiaogan, Hubei 432000, PR China
| | - Zhonghua Liu
- Hubei Provincial Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Hubei Engineering University, Xiaogan, Hubei 432000, PR China; Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan 410128, PR China.
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Yang CS, Zhang J, Zhang L, Huang J, Wang Y. Mechanisms of body weight reduction and metabolic syndrome alleviation by tea. Mol Nutr Food Res 2015; 60:160-74. [PMID: 26577614 DOI: 10.1002/mnfr.201500428] [Citation(s) in RCA: 223] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 09/09/2015] [Accepted: 11/06/2015] [Indexed: 12/13/2022]
Abstract
Tea, a popular beverage made from leaves of the plant Camellia sinensis, has been shown to reduce body weight, alleviate metabolic syndrome, and prevent diabetes and cardiovascular diseases in animal models and humans. Such beneficial effects have generally been observed in most human studies when the level of tea consumption was three to four cups (600-900 mg tea catechins) or more per day. Green tea is more effective than black tea. In spite of numerous studies, the fundamental mechanisms for these actions still remain unclear. From a review of the literature, we propose that the two major mechanisms are: (i) decreasing absorption of lipids and proteins by tea constituents in the intestine, thus reducing calorie intake; and (ii) activating AMP-activated protein kinase by tea polyphenols that are bioavailable in the liver, skeletal muscle, and adipose tissues. The relative importance of these two mechanisms depends on the types of tea and diet consumed by individuals. The activated AMP-activated protein kinase would decrease gluconeogenesis and fatty acid synthesis and increase catabolism, leading to body weight reduction and metabolic syndrome alleviation. Other mechanisms and the health relevance of these beneficial effects of tea consumption remain to be further investigated.
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Affiliation(s)
- Chung S Yang
- Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ, USA.,International Joint Research Laboratory of Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, P. R. China
| | - Jinsong Zhang
- International Joint Research Laboratory of Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, P. R. China.,State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui, P. R. China
| | - Le Zhang
- Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ, USA.,International Joint Research Laboratory of Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, P. R. China
| | - Jinbao Huang
- International Joint Research Laboratory of Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, P. R. China.,State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui, P. R. China
| | - Yijun Wang
- International Joint Research Laboratory of Tea Chemistry and Health Effects, Anhui Agricultural University, Hefei, Anhui, P. R. China.,State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui, P. R. China
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Liu Q, Li X, Li C, Zheng Y, Peng G. 1-Deoxynojirimycin Alleviates Insulin Resistance via Activation of Insulin Signaling PI3K/AKT Pathway in Skeletal Muscle of db/db Mice. Molecules 2015; 20:21700-14. [PMID: 26690098 PMCID: PMC6331926 DOI: 10.3390/molecules201219794] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 11/25/2015] [Accepted: 11/27/2015] [Indexed: 11/16/2022] Open
Abstract
1-Deoxynojirimycin (DNJ) is widely used for the treatment of diabetes mellitus as an inhibitor of intestinal α-glucosidase. However, there are few reports about its effect on insulin sensitivity improvement. The aim of the present study was to investigate whether DNJ decreased hyperglycemia by improving insulin sensitivity. An economical method was established to prepare large amounts of DNJ. Then, db/db mice were treated with DNJ intravenously (20, 40 and 80 mg·kg(-1)·day(-1)) for four weeks. Blood glucose and biochemical analyses were conducted to evaluate the therapeutic effects on hyperglycemia and the related molecular mechanisms in skeletal muscle were explored. DNJ significantly reduced body weight, blood glucose and serum insulin levels. DNJ treatment also improved glucose tolerance and insulin tolerance. Moreover, although expressions of total protein kinase B (AKT), phosphatidylinositol 3 kinase (PI3K), insulin receptor beta (IR-β), insulin receptor substrate-1 (IRS1) and glucose transporter 4 (GLUT4) in skeletal muscle were not affected, GLUT4 translocation and phosphorylation of Ser473-AKT, p85-PI3K, Tyr1361-IR-β and Tyr612-IRS1 were significantly increased by DNJ treatment. These results indicate that DNJ significantly improved insulin sensitivity via activating insulin signaling PI3K/AKT pathway in skeletal muscle of db/db mice.
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Affiliation(s)
- Qingpu Liu
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Xuan Li
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Cunyu Li
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China.
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing 210023, China.
| | - Yunfeng Zheng
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China.
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing 210023, China.
| | - Guoping Peng
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China.
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing 210023, China.
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Huang J, Xie Z, Wang Y, Zhang J, Wan X. Recent advances of anti-hyperglycemia and anti-diabetes actions of tea in animal studies. Curr Opin Food Sci 2015. [DOI: 10.1016/j.cofs.2015.02.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Ding Y, Zou X, Jiang X, Wu J, Zhang Y, Chen D, Liang B. Pu-erh tea down-regulates sterol regulatory element-binding protein and stearyol-CoA desaturase to reduce fat storage in Caenorhaditis elegans. PLoS One 2015; 10:e0113815. [PMID: 25659129 PMCID: PMC4319740 DOI: 10.1371/journal.pone.0113815] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Accepted: 10/30/2014] [Indexed: 11/18/2022] Open
Abstract
Consumption of Pu-erh has been reported to result in numerous health benefits, but the mechanisms underlying purported weight-loss and lowering of lipid are poorly understood. Here, we used the nematode Caenorhaditis elegans to explore the water extract of Pu-erh tea (PTE) functions to reduce fat storage. We found that PTE down-regulates the expression of the master fat regulator SBP-1, a homologue of sterol regulatory element binding protein (SREBP) and its target stearoyl-CoA desaturase (SCD), a key enzyme in fat biosynthesis, leading to an increased ratio of stearic acid (C18:0) to oleic acid (C18:1n-9), and subsequently decreased fat storage. We also found that both the pharyngeal pumping rate and food uptake of C. elegans decreased with exposure to PTE. Collectively, these results provide an experimental basis for explaining the ability of Pu-erh tea in promoting inhibition of food uptake and the biosynthesis of fat via SBP-1 and SCD, thereby reducing fat storage.
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Affiliation(s)
- YiHong Ding
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China
| | - XiaoJu Zou
- Department of Life Science and Technology, Key Laboratory of Special Biological Resource Development and Utilization of University in Yunnan Province, Kunming University, Kunming, 650214, China
- * E-mail: (BL); (XJZ)
| | - Xue Jiang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China
| | - JieYu Wu
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China
| | - YuRu Zhang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China
| | - Dan Chen
- Department of Life Science and Technology, Key Laboratory of Special Biological Resource Development and Utilization of University in Yunnan Province, Kunming University, Kunming, 650214, China
| | - Bin Liang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China
- * E-mail: (BL); (XJZ)
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Nagano T, Hayashibara K, Ueda-Wakagi M, Yamashita Y, Ashida H. Black Tea Polyphenols Promotes GLUT4 Translocation through Both PI3K-and AMPK-dependent Pathways in Skeletal Muscle Cells. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2015. [DOI: 10.3136/fstr.21.489] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Tomoya Nagano
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University
| | - Kaori Hayashibara
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University
| | - Manabu Ueda-Wakagi
- National Agriculture and Food Research Organization, National Food Research Institute
| | - Yoko Yamashita
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University
| | - Hitoshi Ashida
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University
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Xu H, Xu J, Wang Y, Hu S, Wang Y, Wang J, Xue C. Fucoidan isolated from the sea cucumber Acaudina molpadioides improves insulin resistance in adipocytes via activating PKB/GLUT4 pathway. Eur Food Res Technol 2014. [DOI: 10.1007/s00217-014-2380-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Yamashita Y, Wang L, Wang L, Tanaka Y, Zhang T, Ashida H. Oolong, black and pu-erh tea suppresses adiposity in mice via activation of AMP-activated protein kinase. Food Funct 2014; 5:2420-9. [PMID: 25098399 DOI: 10.1039/c4fo00095a] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
It is well known that tea has a variety of beneficial impacts on human health, including anti-obesity effects. It is well documented that green tea and its constituent catechins suppress obesity, but the effects of other types of tea on obesity and the potential mechanisms involved are not yet fully understood. In this study, we investigated the suppression of adiposity by oolong, black and pu-erh tea and characterized the underlying molecular mechanism in vivo. We found that the consumption of oolong, black or pu-erh tea for a period of one week significantly decreased visceral fat without affecting body weight in male ICR mice. On a mechanistic level, the consumption of tea enhanced the phosphorylation of AMP-activated protein kinase (AMPK) in white adipose tissue (WAT). This was accompanied by the induction of WAT protein levels of uncoupling protein 1 and insulin-like growth factor binding protein 1. Our results indicate that oolong, black and pu-erh tea, and in particular, black tea, suppresses adiposity via phosphorylation of the key metabolic regulator AMPK and increases browning of WAT.
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Affiliation(s)
- Yoko Yamashita
- Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Nada-ku, Kobe 657-8501, Japan.
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Sawada K, Yamashita Y, Zhang T, Nakagawa K, Ashida H. Glabridin induces glucose uptake via the AMP-activated protein kinase pathway in muscle cells. Mol Cell Endocrinol 2014; 393:99-108. [PMID: 24953974 DOI: 10.1016/j.mce.2014.06.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 06/09/2014] [Accepted: 06/10/2014] [Indexed: 01/30/2023]
Abstract
The present study demonstrates that glabridin, a prenylated isoflavone in licorice, stimulates glucose uptake through the adenosine monophosphate-activated protein kinase (AMPK) pathway in L6 myotubes. Treatment with glabridin for 4h induced glucose uptake in a dose-dependent manner accompanied by the translocation of glucose transporter type 4 (GLUT4) to the plasma membrane. Glabridin needed at least 4h to increase glucose uptake, while it significantly decreased glycogen and increased lactic acid within 15 min. Pharmacological inhibition of AMPK by Compound C suppressed the glabridin-induced glucose uptake, whereas phosphoinositide 3-kinase and Akt inhibition by LY294002 and Akt1/2 inhibitor, respectively, did not. Furthermore, glabridin induced AMPK phosphorylation, and siRNA for AMPK completely abolished glabridin-induced glucose uptake. We confirmed that glabridin-rich licorice extract prevent glucose intolerance accompanied by the AMPK-dependent GLUT4 translocation in the plasma membrane of mice skeletal muscle. These results indicate that glabridin may possess a therapeutic effect on metabolic disorders, such as diabetes and hyperglycemia, by modulating glucose metabolism through AMPK in skeletal muscle cells.
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Affiliation(s)
- Keisuke Sawada
- Department of Agrobioscience, Graduate School of Agricultural Science, Nada-ku, Kobe University, Kobe 657-8501, Japan
| | - Yoko Yamashita
- Department of Agrobioscience, Graduate School of Agricultural Science, Nada-ku, Kobe University, Kobe 657-8501, Japan
| | - Tianshun Zhang
- Department of Agrobioscience, Graduate School of Agricultural Science, Nada-ku, Kobe University, Kobe 657-8501, Japan
| | - Kaku Nakagawa
- QOL Division, Kaneka Corporation, Kita-ku, Osaka 530-8288, Japan
| | - Hitoshi Ashida
- Department of Agrobioscience, Graduate School of Agricultural Science, Nada-ku, Kobe University, Kobe 657-8501, Japan.
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Yang TY, Chou JI, Ueng KC, Chou MY, Yang JJ, Lin-Shiau SY, Hu ME, Lin JK. Weight Reduction Effect of Puerh Tea in Male Patients with Metabolic Syndrome. Phytother Res 2014; 28:1096-101. [DOI: 10.1002/ptr.5111] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Revised: 11/30/2013] [Accepted: 12/03/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Tsung-Yuan Yang
- Institute of Medicine; Chung Shan Medical University, Chung Shan Medical University Hospital; Taichung Taiwan
| | - Janet I. Chou
- Department of Internal Medicine; UCSF; Fresno CA USA
| | - Kwo-Chang Ueng
- Institute of Medicine; Chung Shan Medical University, Chung Shan Medical University Hospital; Taichung Taiwan
| | - Ming-Yung Chou
- Department of Dentistry, School of Dentistry; Chung Shan Medical University, Chung Shan Medical University Hospital; Taichung Taiwan
| | - Jaw-Ji Yang
- School of Dentistry; Chung Shan Medical University; Taichung Taiwan
| | - Shoei-Yn Lin-Shiau
- College of Chinese Medicine, School of Chinese Medicine; China Medical University; 404 Taichung Taiwan
- Institute of Toxicology, College of Medicine; National Taiwan University; 100 Taipei Taiwan
| | - Ming-E Hu
- Department of Anatomy, School of Medicine; Chung Shan Medical University; Taichung Taiwan
| | - Jen-Kun Lin
- Institute of Biochemistry and Molecular Biology, College of Medicine; National Taiwan University; Taipei Taiwan
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Luo ZM, Du HX, Li LX, An MQ, Zhang ZZ, Wan XC, Bao GH, Zhang L, Ling TJ. Fuzhuanins A and B: the B-ring fission lactones of flavan-3-ols from Fuzhuan brick-tea. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:6982-90. [PMID: 23837839 DOI: 10.1021/jf401724w] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Fuzhuan brick-tea is a special dark tea prepared from the leaves of Camellia sinensis var. sinensis. Its production involves a fungal fermentation stage, which forms the unique flavors and functions by a series of biochemical reactions. Our phytochemical research of the material led to the isolation of two new B-ring fission lactones of flavan-3-ols, fuzhuanins A (1) and B (2). In addition, three other flavan-3-ol derivatives (3-5), three flavone C-glycosides (6-8), eight flavonoid O-glycosides (10-17), five simple phenolics (19-23), two norisoprenoid glycosides (24, 25), two sesquiterpenoids (26, 27), and theobromine (28), as well as two flavonoid anions (9 and 18), were also identified. The structures of these compounds were determined by spectroscopic methods. Compounds 4, 19, 20, 22-24, 26, and 27 were reported for the first time in Camellia spp. and tea. Furthermore, HPLC analysis method was performed to compare the chemical constituents of the before/after fungal fermentation Fuzhuan brick-teas. Compound 1 was indicated as one of the major characteristic constituents generated in the fungal fermentation process. The IC50 value of the antiproliferative activity of 2 on HeLa cells was assayed as 4.48 μM. None of the isolated compounds showed any inhibition activity against the enteric pathogenic microbes at 800 μg/mL by the hole plate diffusion method.
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Affiliation(s)
- Zhen-Mei Luo
- Key Laboratory of Tea Biochemistry and Biotechnology of Ministry of Education and Ministry of Agriculture, Anhui Agricultural University, Hefei 230036, P R China
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Yamashita Y, Yamaoka M, Hasunuma T, Ashida H, Yoshida KI. Detection of orally administered inositol stereoisomers in mouse blood plasma and their effects on translocation of glucose transporter 4 in skeletal muscle cells. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:4850-4854. [PMID: 23641877 DOI: 10.1021/jf305322t] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Simple pharmacological studies on inositol stereoisomers are presented in this study. Male ICR mice were orally administered 1 g/kg BW of three inositol stereoisomers, myo-inositol (MI), d-chiro-inositol (DCI), and scyllo-inositol (SI), and blood plasma samples and skeletal muscle fractions were prepared after an hour. The plasma samples were subjected to gas chromatography-coupled time-of-flight mass spectrometry (GC-TOF-MS) analysis. None of the three stereoisomers was seen in untreated samples, but substantial amounts ranging from 2.5 to 6.5 mM were detected only after administration, indicating that orally administered inositol stereoisomers were readily absorbed and their levels elevated in the bloodstream. In addition, plasma of SI-administered animals contained substantial MI, suggesting a possible metabolic conversion of SI to MI. In the skeletal muscle fractions, glucose transporter type 4 (GLUT4) content in the plasma membrane increased, indicating that inositol stereoisomers stimulated GLUT4 translocation.
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Affiliation(s)
- Yoko Yamashita
- Department of Agrobioscience and ‡Organization of Advanced Science and Technology, Kobe University , 1-1 Rokkodai, Nada, Kobe 657-8501, Japan
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Hu S, Chang Y, Wang J, Xue C, Shi D, Xu H, Wang Y. Fucosylated chondroitin sulfate from Acaudina molpadioides improves hyperglycemia via activation of PKB/GLUT4 signaling in skeletal muscle of insulin resistant mice. Food Funct 2013; 4:1639-46. [DOI: 10.1039/c3fo60247h] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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