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Zhao Q, Yang J, Li J, Zhang L, Yan X, Yue T, Yuan Y. Hypoglycemic effect and intestinal transport of phenolics-rich extract from digested mulberry leaves in Caco-2/insulin-resistant HepG2 co-culture model. Food Res Int 2024; 175:113689. [PMID: 38129030 DOI: 10.1016/j.foodres.2023.113689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 11/02/2023] [Accepted: 11/06/2023] [Indexed: 12/23/2023]
Abstract
Phenolics of mulberry (Morus alba L.) leaves (MLs) have potential anti-diabetic effects, but they may be chemically modified during gastrointestinal digestion so affect their biological activity. In this study, an in vitro digestion model coupled with Caco-2 monolayer and Caco-2/insulin-resistant HepG2 coculture model were used to study the transport and hypoglycemic effects of phenolics in raw MLs (U-MLs) and solid-fermented MLs (F-MLs). The results of LC-MS/MS analysis showed that the Papp (apparent permeability coefficient, 10-6cm/s) of phenolics in digested MLs ranged from 0.002 ± 0.00 (quercetin 3-O-glucoside) to 60.19 ± 0.67 (ferulic acid), indicating higher phenolic acids absorbability and poor flavonoids absorbability. The Papp values of phenolic extracts of F-MLs in Caco-2 monolayer were significantly higher (p > 0.05) than that of U-MLs. Digested phenolic extracts inhibited the activities of sucrase (60.13 ± 2.03 %) and maltase (82.35 ± 0.78 %) and decreased 9.28 ± 0.84 % of glucose uptake in Caco-2 monolayer. Furthermore, a decrease in the mRNA expression of glucose transporters SGLT1 (0.64 ± 0.18), GLUT2 (0.14 ± 0.02) and the sucrase-isomaltase (0.59 ± 0.00) was observed. In Caco-2/insulin-resistant HepG2 co-culture model, phenolic extracts regulated glucose metabolism by up-regulating the mRNA expressions of IRS1 (9.32-fold), Akt (17.07-fold) and GYS2 (1.5-fold), and down-regulating the GSK-3β (0.22-fold), PEPCK (0.49-fold) and FOXO1 (0.10-fold) mRNA levels. Both U-MLs and F-MLs could improve glucose metabolism, and the partial least squares (PLS) analysis showed that luteoforol and p-coumaric acid were the primary phenolics that strongly correlated with the hypoglycemic ability of MLs. Results suggested that phenolics of MLs can be used as dietary supplements to regulate glucose metabolism.
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Affiliation(s)
- Qiannan Zhao
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Jinyi Yang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Jiahui Li
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Lei Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Xiaohai Yan
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Tianli Yue
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China; College of Food Science and Techonology, Northwest University, Xi'an 710069, China.
| | - Yahong Yuan
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China; College of Food Science and Techonology, Northwest University, Xi'an 710069, China.
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LIU J, LV YJ, PAN JX, JIANG YL, ZHU YJ, ZHANG SK. Effects of tea polyphenols and EGCG on glucose metabolism and intestinal flora in diabetic mice fed a cornstarch-based functional diet. FOOD SCIENCE AND TECHNOLOGY 2022. [DOI: 10.1590/fst.50821] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Jun LIU
- Hangzhou Tea Research Institute, China
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Mogire MK, Choi J, Lu P, Yang C, Liu S, Adewole D, Rodas-Gonzalez A, Yang C. Effects of red-osier dogwood extracts on growth performance, intestinal digestive and absorptive functions, and meat quality of broiler chickens. CANADIAN JOURNAL OF ANIMAL SCIENCE 2021. [DOI: 10.1139/cjas-2020-0191] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A total of 320 one-day-old Cobb 500 chicks with an initial weight of 48.3 ± 3.3 g·pen−1 were assigned to four dietary treatments with eight replicates provided in three phases for 46 d. The treatments were fed as mash diets and included (1) negative control (NC) corn-soybean basal diet, (2) positive control (PC) basal diet with 30 ppm avilamycin, (3) basal diet supplemented with 1000 ppm red-osier dogwood extracts (RDE1), and (4) basal diet with 3000 ppm red-osier dogwood extracts (RDE2). Results showed reduced jejunal crypt depth in RDE1 and increased villus:crypt ratio in groups (either RDE1 or RDE2) (P < 0.05). Cationic amino acid (AA) transporter mRNA abundance was decreased (P < 0.05) in RDE1, RDE2, and PC treatments, but peptide and neutral AA transporter mRNA abundance were higher (P < 0.05) in RDE2 compared with NC. Apparent ileal digestibility of crude fat was increased in RDE2 and PC compared with NC, whereas AA digestibility was greater in RDE1, RDE2, and PC (P < 0.05). In conclusion, red-osier dogwood had no effect on growth performance, improved the intestinal health and function of broiler chickens, and had no detrimental effects on meat quality.
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Affiliation(s)
- Marion K. Mogire
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Janghan Choi
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Peng Lu
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Chongwu Yang
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Shangxi Liu
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Deborah Adewole
- Department of Animal Science and Aquaculture, Dalhousie University, Truro, NS B2N 5E3, Canada
| | | | - Chengbo Yang
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
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Moazzem Hossen S, Hossain MS, Akbar S, Tahmida U, Mawa J, Uddin Emon N. Wild mushrooms showed analgesic and cytotoxic properties along with phytoconstituent's binding affinity to COX-1, COX-2 and cytochrome P450 2C9. Heliyon 2021; 7:e07997. [PMID: 34585013 PMCID: PMC8455681 DOI: 10.1016/j.heliyon.2021.e07997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 04/05/2021] [Accepted: 09/10/2021] [Indexed: 11/09/2022] Open
Abstract
This study was designed to evaluate the cytotoxic and analgesic potential of methanol extracts of five wild mushrooms available in the University of Chittagong, Bangladesh. The acetic acid-induced writhing method was used for the analgesic activity, while cytotoxicity was tested using brine shrimp lethality bioassay. In silico molecular docking and ADME/T study have been employed by using Schrodinger v11.1, BIOVIA Discovery Studio 2020 and online tool (AdmeSAR) respectively. The methanol extracts of Daldinia concentrica, Trametes lactinea, Fomitopsis cajanderi and Daedaleopsis confragosa exhibited a significant (p < 0.001) decrease in the number of writhing when compared to the control group. Except for Lentinus squarrosulus at 200 mg/kg body weight, the remaining mushroom extracts showed equal to or above 50 % inhibition of writhing. Daldinia concentrica showed the lowest LC50 values with 0.63 μg/mL, while Daedaleopsis confragosa showed the highest LC50 values of 2.33 μg/mL, indicating decisive cytotoxic action all mushrooms extracts. Considering the secondary metabolites, daldinan A and fomlactone A were found the most promising myco-compounds in analgesic and cytotoxic molecular docking studies. Besides, all the selected metabolites meet the rule of Lipinski's drug-likeliness. These results concluded that each mushroom extracts except Lentinus squarrosulus possess a potential analgesic. All the mushroom extracts embrace a promising cytotoxic activity that may guide the progress of a new drug.
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Affiliation(s)
- S.M. Moazzem Hossen
- Department of Pharmacy, Faculty of Biological Science, University of Chittagong, Chittagong 4331, Bangladesh
| | - Mohammad Shahadat Hossain
- Department of Pharmacy, Faculty of Biological Science, University of Chittagong, Chittagong 4331, Bangladesh
| | - Sumaiya Akbar
- Department of Pharmacy, Faculty of Biological Science, University of Chittagong, Chittagong 4331, Bangladesh
| | - Umme Tahmida
- Department of Pharmacy, Faculty of Biological Science, University of Chittagong, Chittagong 4331, Bangladesh
| | - Jannatul Mawa
- Department of Pharmacy, Faculty of Biological Science, University of Chittagong, Chittagong 4331, Bangladesh
| | - Nazim Uddin Emon
- Department of Pharmacy, Faculty of Science and Engineering, International Islamic University Chittagong, Chittagong 4318, Bangladesh
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Hosen MZ, Biswas A, Islam MR, Hossain SJ. Anti-Bacterial, Anti-Diarrheal, and Cytotoxic Activities of Edible Fruits in the Sundarbans Mangrove Forest of Bangladesh. Prev Nutr Food Sci 2021; 26:192-199. [PMID: 34316484 PMCID: PMC8276707 DOI: 10.3746/pnf.2021.26.2.192] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 02/14/2021] [Accepted: 03/02/2021] [Indexed: 01/14/2023] Open
Abstract
This study evaluated anti-bacterial, anti-diarrheal, and cytotoxic activities of ten edible fruits (Aegiceras corniculatum, Avicennia officinalis, Bruguiera gymnorrhiza, Ceriops decandra, Heritiera fomes, Nypa fruticans, Phoenix paludosa, Sarcolobusglobosus, Sonneratia caseolaris, and Xylocarpus mekongensis) in the Sundarbans mangrove forest of Bangladesh. Highest antibacterial activity was shown for ethanol:methanol (1:1) extracts of S. caseolaris (2 mg/disc), which demonstrated inhibition zones of 16.7, 17.0, 14.7, 15.7, and 15.7 mm against Escherichia coli, Klebsiella sp., Shigella boydii, Shigella sonnei, and Staphylococcus aureus, respectively. In mice with castor oil-induced diarrhea, S. caseolaris extract (250 mg/kg body weight) showed the highest inhibition (87.7%) and delayed the onset time (273 min) of diarrheal episodes, followed by A. corniculatum extract (inhibition, 83.6%; delayed onset time, 187.4 min). S. caseolaris and A. corniculatum fruit powders were successively fractionated into n-hexane, diethyl ether, chloroform, ethanol, and methanol. Antidiarrheal activity significantly increased with increasing polarity of these fractions. In brine shrimp lethality assay, S. globosus extract demonstrated the highest cytotoxicity (59.2 μg/mL), followed by H. fomes (74.1 μg/mL) and C. decandra (116.7 μg/mL); however, lowest cytotoxicity was shown for A. corniculatum, A. officinalis, and S. caseolaris extracts. Mice treated with A. corniculatum extract did not experience any acute toxicity. These results demonstrate that S. caseolaris and A. corniculatum fruits have potential to treat diarrhea and may act as useful nutraceuticals.
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Affiliation(s)
- M Zakir Hosen
- Biotechnology and Genetic Engineering Discipline, Life Science School, Khulna University, Khulna 9208, Bangladesh
| | - Anirban Biswas
- Biotechnology and Genetic Engineering Discipline, Life Science School, Khulna University, Khulna 9208, Bangladesh
| | - M Rabiul Islam
- Biotechnology and Genetic Engineering Discipline, Life Science School, Khulna University, Khulna 9208, Bangladesh
| | - Sheikh Julfikar Hossain
- Biotechnology and Genetic Engineering Discipline, Life Science School, Khulna University, Khulna 9208, Bangladesh
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Wang H, Fowler MI, Messenger DJ, Ordaz-Ortiz JJ, Gu X, Shi S, Terry LA, Berry MJ, Lian G, Wang S. Inhibition of the intestinal postprandial glucose transport by gallic acid and gallic acid derivatives. Food Funct 2021; 12:5399-5406. [PMID: 33988204 DOI: 10.1039/d1fo01118a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Inhibition of glucose uptake in the intestine through sodium-dependent glucose transporter 1 (SGLT1) or glucose transporter 2 (GLUT2) may be beneficial in controlling postprandial blood glucose levels. Gallic acid and ten of its derivatives were identified in the active fractions of Terminalia chebula Retz. fructus immaturus, a popular edible plant fruit which has previously been associated with the inhibition of glucose uptake. Gallic acid derivatives (methyl gallate, ethyl gallate, pentyl gallate, 3,4,6-tri-O-galloyl-β-d-glucose, and corilagin) showed good glucose transport inhibition with inhibitory rates of 72.1 ± 1.6%, 71.5 ± 1.4%, 79.9 ± 1.2%, 44.7 ± 1.2%, and 75.0 ± 0.7% at 5 mM d-glucose and/or 56.3 ± 2.3, 52.1 ± 3.2%, 70.2 ± 1.7%, 15.6 ± 1.6%, and 37.1 ± 0.8% at 25 mM d-glucose. However, only 3,4,6-tri-O-galloyl-β-d-glucose and corilagin were confirmed GLUT2-specific inhibitors. Whilst some tea flavonoids demonstrated minimal glucose transport inhibition, their gallic acid derivatives strongly inhibited transport effect with GLUT2 specificity. This suggests that gallic acid structures are crucial for glucose transport inhibition. Plants, such as T. chebula, which contain high levels of gallic acid and its derivatives, show promise as natural functional ingredients for inclusion in foods and drinks designed to control postprandial glucose levels.
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Affiliation(s)
- Huijun Wang
- The MOE Key Laboratory for Standardization of Chinese Medicines and the SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai 201203, P. R. China. and Unilever R&D Colworth, Colworth Science Park, Sharnbrook, Bedford MK44 1LQ, UK.
| | - Mark I Fowler
- Unilever R&D Colworth, Colworth Science Park, Sharnbrook, Bedford MK44 1LQ, UK.
| | - David J Messenger
- Unilever R&D Colworth, Colworth Science Park, Sharnbrook, Bedford MK44 1LQ, UK.
| | - Jose Juan Ordaz-Ortiz
- Plant Science Laboratory, Cranfield University, MK43 0AL, UK and National Laboratory of Genomics for Biodiversity, CINVESTAV IPN, 36824 Irapuato, Guanajuato, Mexico
| | - Xuelan Gu
- Unilever R&D Shanghai, 5/F, 66 Lin Xin Road, Shanghai 200335, P. R. China
| | - Songshan Shi
- The MOE Key Laboratory for Standardization of Chinese Medicines and the SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai 201203, P. R. China.
| | - Leon A Terry
- Plant Science Laboratory, Cranfield University, MK43 0AL, UK
| | - Mark J Berry
- Unilever R&D Colworth, Colworth Science Park, Sharnbrook, Bedford MK44 1LQ, UK.
| | - Guoping Lian
- Unilever R&D Colworth, Colworth Science Park, Sharnbrook, Bedford MK44 1LQ, UK. and Department of Chemical and Process Engineering, University of Surrey, Guildford, GU2 7XH, UK
| | - Shunchun Wang
- The MOE Key Laboratory for Standardization of Chinese Medicines and the SATCM Key Laboratory for New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Shanghai 201203, P. R. China.
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Effect of Acute and Chronic Dietary Supplementation with Green Tea Catechins on Resting Metabolic Rate, Energy Expenditure and Respiratory Quotient: A Systematic Review. Nutrients 2021; 13:nu13020644. [PMID: 33671139 PMCID: PMC7922336 DOI: 10.3390/nu13020644] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 02/05/2021] [Accepted: 02/11/2021] [Indexed: 11/25/2022] Open
Abstract
The consumption of green tea catechins (GTC) is associated with modulations of fat metabolism and consequent weight loss. The aim of this systematic review was to investigate the effect of GTC on resting metabolic rate (RMR), energy expenditure (EE), and respiratory quotient (RQ). Eligible studies considered both the chronic and acute intake of GTC-based supplements, with epigallocatechin gallate (EGCG) doses ranging between 100–800 mg. Findings from 15 studies (n = 499 participants) lasting 8–12 weeks (for chronic consumption) or 1–3 days (for acute intake) are summarized. This review reveals the positive effects of GTC supplementation on RQ values (272 subjects). Regarding the effects of acute and chronic GTC supplementation on RMR (244 subjects) and EE (255 subjects), the results did not allow for a definitive conclusion, even though they were promising, because some reported a positive improvement (two studies revealed an increase in RMR: one demonstrated an RMR increase of 43.82 kcal/day and another demonstrated an increase of 260.8 kcal/day, mainly when subjects were also engaged in resistance training exercise). Considering GTC daily dose supplementation, studies in which modifications of energetic parameters occurred, in particular RQ reduction, considered GTC low doses (100–300 mg). GTC may be useful for improving metabolic profiles. Further investigations are needed to better define adequate doses of supplementation.
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Lee YE, Yoo SH, Chung JO, Park MY, Hong YD, Park SH, Park TS, Shim SM. Hypoglycemic effect of soluble polysaccharide and catechins from green tea on inhibiting intestinal transport of glucose. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2020; 100:3979-3986. [PMID: 32342987 DOI: 10.1002/jsfa.10442] [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] [Received: 03/14/2019] [Revised: 03/05/2020] [Accepted: 04/28/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Water soluble polysaccharide derived from green tea (WSP) is produced as byproducts when catechins were extracted from green tea. Although inhibitory effect of green tea catechins on the glucose transport in small intestine has been studied, the hypoglycemic efficacy of the WSP or its combinational effect has not been studied. In order to investigate hypoglycemic efficacy of the WSP or its combinational effect with green tea extract (GTE), co-consumption of GTE and WSP with wheat starch was investigated using in vitro digestion coupled with Caco-2 cells. The mechanism of the intestinal glucose transport was elucidated throughout the gene expression of the intestinal glucose transporters, which included sodium dependent glucose transporter (SGLT1) and glucose transporter 2 (GLUT2), using quantitative real-time polymerase chain reaction (qRT-PCR). RESULTS The co-digestion of wheat starch with GTE during the small intestinal phase was the most rapidly digested into reducing sugar (73.96 g L-1 ) compared to itself (48.44 g L-1 ), WSP (60.35 g L-1 ), and GTE + WSP (61.81 g L-1 ). Intestinal glucose transport was 11.82, 7.59, 4.49, and 2.40% for wheat starch, wheat starch with GTE, WSP, and GTE + WSP, respectively. The highest decreased expression pattern in SGLT1 was observed when cells treated with wheat starch + GTE + WSP (0.66-fold) compared to GTE or WSP treatment. CONCLUSION The results suggested that co-consumption of green tea derived products with wheat starch could delay the intestinal absorption of glucose. Results from the current study suggested that GTE and WSP could be the useful supplements of dietary therapy for hyperglycemia to delay glucose absorption. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Yeong-Eun Lee
- Department of Food Science and Technology, Sejong University, Seoul, Republic of Korea
| | - So-Hee Yoo
- Department of Food Science and Technology, Sejong University, Seoul, Republic of Korea
| | - Jin-Oh Chung
- AMOREPACIFIC R&D Center, 1920, Youngu-daero, Giheung-gu, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Mi-Young Park
- AMOREPACIFIC R&D Center, 1920, Youngu-daero, Giheung-gu, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Yong-Deog Hong
- AMOREPACIFIC R&D Center, 1920, Youngu-daero, Giheung-gu, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Si-Hyun Park
- Department of Life Science, Gachon University, 1342 Sungnamdaero Sujunggu, Sungnam, Gyeonggido 13120, Republic of Korea
| | - Tae-Sik Park
- Department of Life Science, Gachon University, 1342 Sungnamdaero Sujunggu, Sungnam, Gyeonggido 13120, Republic of Korea
| | - Soon-Mi Shim
- Department of Food Science and Technology, Sejong University, Seoul, Republic of Korea
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Ni D, Ai Z, Munoz-Sandoval D, Suresh R, Ellis PR, Yuqiong C, Sharp PA, Butterworth PJ, Yu Z, Corpe CP. Inhibition of the facilitative sugar transporters (GLUTs) by tea extracts and catechins. FASEB J 2020; 34:9995-10010. [PMID: 32564472 DOI: 10.1096/fj.202000057rr] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 04/17/2020] [Accepted: 05/05/2020] [Indexed: 01/21/2023]
Abstract
Tea polyphenolics have been suggested to possess blood glucose lowering properties by inhibiting sugar transporters in the small intestine and improving insulin sensitivity. In this report, we studied the effects of teas and tea catechins on the small intestinal sugar transporters, SGLT1 and GLUTs (GLUT1, 2 and 5). Green tea extract (GT), oolong tea extract (OT), and black tea extract (BT) inhibited glucose uptake into the intestinal Caco-2 cells with GT being the most potent inhibitor (IC50 : 0.077 mg/mL), followed by OT (IC50 : 0.136 mg/mL) and BT (IC50 : 0.56 mg/mL). GT and OT inhibition of glucose uptake was partial non-competitive, with an inhibitor constant (Ki ) = 0.0317 and 0.0571 mg/mL, respectively, whereas BT was pure non-competitive, Ki = 0.36 mg/mL. Oocytes injected to express small intestinal GLUTs were inhibited by teas, but SGLT1 was not. Furthermore, catechins present in teas were the predominant inhibitor of glucose uptake into Caco-2 cells, and gallated catechins the most potent: CG > ECG > EGCG ≥ GCG when compared to the non-gallated catechins (C, EC, GC, and EGC). In Caco-2 cells, individual tea catechins reduced the SGLT1 gene, but not protein expression levels. In contrast, GLUT2 gene and protein expression levels were reduced after 2 hours exposure to catechins but increased after 24 hours. These in vitro studies suggest teas containing catechins may be useful dietary supplements capable of blunting postprandial glycaemia in humans, including those with or at risk to Type 2 diabetes mellitus.
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Affiliation(s)
- Dejiang Ni
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan City, China.,Faculty of Life Sciences and Medicine, Departments of Biochemistry and Nutrition, King's College London, London, UK
| | - Zeyi Ai
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan City, China.,Institute of Leisure Agriculture, Jiangsu Academy of Agricultural Sciences, Nanjing City, China
| | - Diana Munoz-Sandoval
- Faculty of Life Sciences and Medicine, Department of Nutritional Sciences, King's College London, London, UK
| | - Reshma Suresh
- Faculty of Life Sciences and Medicine, Department of Nutritional Sciences, King's College London, London, UK
| | - Peter R Ellis
- Faculty of Life Sciences and Medicine, Departments of Biochemistry and Nutrition, King's College London, London, UK
| | - Chen Yuqiong
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan City, China
| | - Paul A Sharp
- Faculty of Life Sciences and Medicine, Department of Nutritional Sciences, King's College London, London, UK
| | - Peter J Butterworth
- Faculty of Life Sciences and Medicine, Departments of Biochemistry and Nutrition, King's College London, London, UK
| | - Zhi Yu
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan City, China
| | - Christopher P Corpe
- Faculty of Life Sciences and Medicine, Department of Nutritional Sciences, King's College London, London, UK
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Barik SK, Russell WR, Moar KM, Cruickshank M, Scobbie L, Duncan G, Hoggard N. The anthocyanins in black currants regulate postprandial hyperglycaemia primarily by inhibiting α-glucosidase while other phenolics modulate salivary α-amylase, glucose uptake and sugar transporters. J Nutr Biochem 2019; 78:108325. [PMID: 31952012 DOI: 10.1016/j.jnutbio.2019.108325] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 11/15/2019] [Accepted: 12/17/2019] [Indexed: 02/07/2023]
Abstract
The hypoglycaemic effects of two Ribes sp. i.e., anthocyanin-rich black currants (BC) were compared to green currants (GC), which are low in anthocyanins to establish which compounds are involved in the regulation of postprandial glycaemia. We determined the effect of the currants on inhibiting carbohydrate digestive enzymes (α-amylase, α-glucosidase), intestinal sugar absorption and transport across CaCo-2 cells. The digestion of these currants was modelled using in vitro gastrointestinal digestion (IVGD) to identify the metabolites present in the digested extracts by LC-MS/MS. Freeze-dried BC and IVDG extracts inhibited yeast α-glucosidase activity (P<.0001) at lower concentrations than acarbose, whereas GC and IVDG GC at the same concentrations showed no inhibition. BC and GC both showed significant inhibitory effects on salivary α-amylase (P<.0001), glucose uptake (P<.0001) and the mRNA expression of sugar transporters (P<.0001). Taken together this suggests that the anthocyanins which are high in BC have their greatest effect on postprandial hyperglycaemia by inhibiting α-glucosidase activity. Phytochemical analysis identified the phenolics in the currants and confirmed that freeze-dried BC contained higher concentrations of anthocyanins compared to GC (39.80 vs. 9.85 g/kg dry weight). Specific phenolics were also shown to inhibit salivary α-amylase, α-glucosidase, and glucose uptake. However, specific anthocyanins identified in BC which were low in GC were shown to inhibit α-glucosidase. In conclusion the anthocyanins in BC appear to regulate postprandial hyperglycaemia primarily but not solely by inhibiting α-glucosidase while other phenolics modulate salivary α-amylase, glucose uptake and sugar transporters which together could lower the associated risk of developing type-2 diabetes.
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Affiliation(s)
- Sisir Kumar Barik
- University of Aberdeen, Rowett Institute, School of Medicine, Medical Sciences and Nutrition, Aberdeen, AB25 2ZD, United Kingdom
| | - Wendy R Russell
- University of Aberdeen, Rowett Institute, School of Medicine, Medical Sciences and Nutrition, Aberdeen, AB25 2ZD, United Kingdom
| | - Kim M Moar
- University of Aberdeen, Rowett Institute, School of Medicine, Medical Sciences and Nutrition, Aberdeen, AB25 2ZD, United Kingdom
| | - Morven Cruickshank
- University of Aberdeen, Rowett Institute, School of Medicine, Medical Sciences and Nutrition, Aberdeen, AB25 2ZD, United Kingdom
| | - Lorraine Scobbie
- University of Aberdeen, Rowett Institute, School of Medicine, Medical Sciences and Nutrition, Aberdeen, AB25 2ZD, United Kingdom
| | - Gary Duncan
- University of Aberdeen, Rowett Institute, School of Medicine, Medical Sciences and Nutrition, Aberdeen, AB25 2ZD, United Kingdom
| | - Nigel Hoggard
- University of Aberdeen, Rowett Institute, School of Medicine, Medical Sciences and Nutrition, Aberdeen, AB25 2ZD, United Kingdom.
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11
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Pico J, Martínez MM. Unraveling the Inhibition of Intestinal Glucose Transport by Dietary Phenolics: A Review. Curr Pharm Des 2019; 25:3418-3433. [DOI: 10.2174/1381612825666191015154326] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 10/03/2019] [Indexed: 01/09/2023]
Abstract
Background:Glucose transport across the intestinal brush border membrane plays a key role in metabolic regulation. Depending on the luminal glucose concentration, glucose is mainly transported by the sodium- dependent glucose transporter (SGLT1) and the facilitated-transporter glucose transporter (GLUT2). SGLT1 is apical membrane-constitutive and it is active at a low luminal glucose concentration, while at concentrations higher than 50 mM, glucose is mainly transported by GLUT2 (recruited from the basolateral membrane). Dietary phenolic compounds can modulate glucose homeostasis by decreasing the postprandial glucose response through the inhibition of SGLT1 and GLUT2.Methods:Phenolic inhibition of intestinal glucose transport has been examined using brush border membrane vesicles from rats, pigs or rabbits, Xenopus oocytes and more recently Caco-2 cells, which are the most promising for harmonizing in vitro experiments.Results:Phenolic concentrations above 100 µM has been proved to successfully inhibit the glucose transport. Generally, the aglycones quercetin, myricetin, fisetin or apigenin have been reported to strongly inhibit GLUT2, while quercetin-3-O-glycoside has been demonstrated to be more effective in SGLT1. Additionally, epigallocatechin as well as epicatechin and epigallocatechin gallates were observed to be inhibited on both SGLT1 and GLUT2.Conclusion:Although, valuable information regarding the phenolic glucose transport inhibition is known, however, there are some disagreements about which flavonoid glycosides and aglycones exert significant inhibition, and also the inhibition of phenolic acids remains unclear. This review aims to collect, compare and discuss the available information and controversies about the phenolic inhibition of glucose transporters. A detailed discussion on the physicochemical mechanisms involved in phenolics-glucose transporters interactions is also included.
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Affiliation(s)
- Joana Pico
- School of Engineering, University of Guelph, Guelph, ON, N1G 2W1, Canada
| | - Mario M. Martínez
- School of Engineering, University of Guelph, Guelph, ON, N1G 2W1, Canada
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12
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Zhang HH, Liu J, Lv YJ, Jiang YL, Pan JX, Zhu YJ, Huang MG, Zhang SK. Changes in Intestinal Microbiota of Type 2 Diabetes in Mice in Response to Dietary Supplementation With Instant Tea or Matcha. Can J Diabetes 2019; 44:44-52. [PMID: 31378691 DOI: 10.1016/j.jcjd.2019.04.021] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 01/28/2019] [Accepted: 04/30/2019] [Indexed: 02/06/2023]
Abstract
OBJECTIVE Gut microbiota plays a key role in metabolism and health in diabetes patients with gastrointestinal microbiota dysbiosis. Thus, regulating the ecological balance of gut microbiota may provide a pathway toward improvement for these patients. Our previous study showed that functional ingredients in tea may inhibit cornstarch digestion in vitro. METHODS A cornstarch-tea diet was developed, and in this study we investigated the effects of such a diet on blood glucose and gut microbiota in diabetic mice. RESULTS Diabetes resulted in significant weight loss, hyperphagia and hyperglycemia. 16S rDNA sequencing revealed that in diabetes there is significantly increased Bacteroidaceae, Helicobacteraceae, Ruminococcaceae, Enterobacteriaceae, Rikenellaceae and Saccharibacteria_genera_incertae_sedis, and significantly decreased Lactobacillaceae, Prevotellaceae, Coriobacteriaceae, Verrucomicrobiaceae and Bifidobacteriaceae. The cornstarch‒tea diet resulted in a trend toward reduced blood glucose, with particularly increased levels of Coriobacteriaceae, Lactobacillaceae, Prevotellaceae and Bifidobacteriaceae, and decreased Bacteroidaceae, Ruminococcaceae, Helicobacteraceae and Enterobacteriaceae. CONCLUSIONS Instant tea and matcha supplementation had beneficial effects on regulation of blood glucose and gut microbiota, reversing the changes in microbiota caused by alloxan injection. The cornstarch‒tea regulation pathway is involved in bacterium group regulation rather than single-species regulation, which suggests that cornstarch combined with tea may be used as a functional food supplement for diabetes patients.
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Affiliation(s)
- Hai-Hua Zhang
- Hangzhou Tea Research Institute, CHINA COOP, Zhejiang Key Laboratory of Transboundary Applied Technology for Tea Resources, Hangzhou, China
| | - Jun Liu
- Hangzhou Tea Research Institute, CHINA COOP, Zhejiang Key Laboratory of Transboundary Applied Technology for Tea Resources, Hangzhou, China
| | - Yang-Jun Lv
- Hangzhou Tea Research Institute, CHINA COOP, Zhejiang Key Laboratory of Transboundary Applied Technology for Tea Resources, Hangzhou, China
| | - Yu-Lan Jiang
- Hangzhou Tea Research Institute, CHINA COOP, Zhejiang Key Laboratory of Transboundary Applied Technology for Tea Resources, Hangzhou, China
| | - Jun-Xian Pan
- Hangzhou Tea Research Institute, CHINA COOP, Zhejiang Key Laboratory of Transboundary Applied Technology for Tea Resources, Hangzhou, China
| | - Yue-Jin Zhu
- Hangzhou Tea Research Institute, CHINA COOP, Zhejiang Key Laboratory of Transboundary Applied Technology for Tea Resources, Hangzhou, China
| | - Mei-Gui Huang
- Department of Food Science and Technology, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing, China
| | - Shi-Kang Zhang
- Hangzhou Tea Research Institute, CHINA COOP, Zhejiang Key Laboratory of Transboundary Applied Technology for Tea Resources, Hangzhou, China.
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13
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Li D, Sun L, Yang Y, Wang Z, Yang X, Zhao T, Gong T, Zou L, Guo Y. Young apple polyphenols postpone starch digestion in vitro and in vivo. J Funct Foods 2019. [DOI: 10.1016/j.jff.2019.03.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
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Loureiro G, Martel F. The effect of dietary polyphenols on intestinal absorption of glucose and fructose: Relation with obesity and type 2 diabetes. FOOD REVIEWS INTERNATIONAL 2019. [DOI: 10.1080/87559129.2019.1573432] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Guilherme Loureiro
- Department of Biomedicine, Unit of Biochemistry, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Fátima Martel
- Department of Biomedicine, Unit of Biochemistry, Faculty of Medicine, University of Porto, Porto, Portugal
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
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Abstract
Based on many cell culture, animal and human studies, it is well known that the most challenge issue for developing polyphenolics as chemoprevention or anti-diabtetic agents is the low oral bioavailability, which may be the major reason relating to its ambiguous therapeutic effects and large inter-individual variations in clinical trials. This review intends to highlight the unscientific evaluation on the basis of the published data regarding in vitro bioactivity of polyphenols, which may sometimes mislead the researchers and to conclude that: first, bio-accessibilities values obtained in the studies for polyphenols should be highly reconsidered in accordance with the abundant newly identified circulating and excreted metabolites, with a particular attention to colonic metabolic products which are obviously contributing much more than expected to their absorptions; second, it is phenolic metabolites, which are formed in the small intestine and hepatic cells,low molecular weight catabolic products of the colonic microflora to travel around the human body in the circulatory system or reach body tissues to elicit bioactive effects. It is concluded that better performed in vivo intervention and in vitro mechanistic studies are needed to fully understand how these molecules interact with human physiological and pathological processes.
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Affiliation(s)
- Hui Teng
- a College of Food Science , Fujian Agriculture and Forestry University , Fuzhou , Fujian , China
| | - Lei Chen
- a College of Food Science , Fujian Agriculture and Forestry University , Fuzhou , Fujian , China
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Pico J, Corbin S, Ferruzzi MG, Martinez MM. Banana flour phenolics inhibit trans-epithelial glucose transport from wheat cakes in a coupled in vitrodigestion/Caco-2 cell intestinal model. Food Funct 2019; 10:6300-6311. [DOI: 10.1039/c9fo01679a] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
A 10% replacement of wheat flour with banana flour subjected to different processing conditions resulted in from 45.0 to 54.5% higher glucose transport inhibition.
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Affiliation(s)
- Joana Pico
- School of Engineering
- University of Guelph
- Guelph
- Canada
| | - Sydney Corbin
- Plants for Human Health Institute
- Department of Food
- Bioprocessing and Nutrition Science
- North Carolina State University
- Kannapolis
| | - Mario G. Ferruzzi
- Plants for Human Health Institute
- Department of Food
- Bioprocessing and Nutrition Science
- North Carolina State University
- Kannapolis
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Domínguez-Avila JA, Wall-Medrano A, Velderrain-Rodríguez GR, Chen CYO, Salazar-López NJ, Robles-Sánchez M, González-Aguilar GA. Gastrointestinal interactions, absorption, splanchnic metabolism and pharmacokinetics of orally ingested phenolic compounds. Food Funct 2018; 8:15-38. [PMID: 28074953 DOI: 10.1039/c6fo01475e] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The positive health effects of phenolic compounds (PCs) have been extensively reported in the literature. An understanding of their bioaccessibility and bioavailability is essential for the elucidation of their health benefits. Before reaching circulation and exerting bioactions in target tissues, numerous interactions take place before and during digestion with either the plant or host's macromolecules that directly impact the organism and modulate their own bioaccessibility and bioavailability. The present work is focused on the gastrointestinal (GI) interactions that are relevant to the absorption and metabolism of PCs and how these interactions impact their pharmacokinetic profiles. Non-digestible cell wall components (fiber) interact intimately with PCs and delay their absorption in the small intestine, instead carrying them to the large intestine. PCs not bound to fiber interact with digestible nutrients in the bolus where they interfere with the digestion and absorption of proteins, carbohydrates, lipids, cholesterol, bile salts and micronutrients through the inhibition of digestive enzymes and enterocyte transporters and the disruption of micelle formation. PCs internalized by enterocytes may reach circulation (through transcellular or paracellular transport), be effluxed back into the lumen (P-glycoprotein, P-gp) or be metabolized by phase I and phase II enzymes. Some PCs can inhibit P-gp or phase I/II enzymes, which can potentially lead to drug-nutrient interactions. The absorption and pharmacokinetic parameters are modified by all of the interactions within the digestive tract and by the presence of other PCs. Undesirable interactions have promoted the development of nanotechnological approaches to promote the bioaccessibility, bioavailability, and bioefficacy of PCs.
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Affiliation(s)
- J Abraham Domínguez-Avila
- Coordinación de Tecnología de Alimentos de Origen Vegetal, Centro de Investigación en Alimentación y Desarrollo, A.C. Carretera a la Victoria Km 0.6. C.P. 83304, Hermosillo, Sonora, Mexico.
| | - Abraham Wall-Medrano
- Departamento de Ciencias Químico-Biológicas, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Anillo Envolvente del Pronaf y Estocolmo s/n, CP 32310, Cd. Juárez, Chihuahua, Mexico.
| | - Gustavo R Velderrain-Rodríguez
- Coordinación de Tecnología de Alimentos de Origen Vegetal, Centro de Investigación en Alimentación y Desarrollo, A.C. Carretera a la Victoria Km 0.6. C.P. 83304, Hermosillo, Sonora, Mexico.
| | - C-Y Oliver Chen
- Antioxidants Research Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, 711 Washington Street, Boston, Massachusetts 02111, USA.
| | - Norma Julieta Salazar-López
- Departamento de Investigación y Posgrado en Alimentos, Universidad de Sonora, Blvd. Luis Encinas y Rosales S/N Col. Centro, C.P. 83000, Hermosillo, Sonora, Mexico.
| | - Maribel Robles-Sánchez
- Departamento de Investigación y Posgrado en Alimentos, Universidad de Sonora, Blvd. Luis Encinas y Rosales S/N Col. Centro, C.P. 83000, Hermosillo, Sonora, Mexico.
| | - Gustavo A González-Aguilar
- Coordinación de Tecnología de Alimentos de Origen Vegetal, Centro de Investigación en Alimentación y Desarrollo, A.C. Carretera a la Victoria Km 0.6. C.P. 83304, Hermosillo, Sonora, Mexico.
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Hossain SJ, Islam MR, Pervin T, Iftekharuzzaman M, Hamdi OAA, Mubassara S, Saifuzzaman M, Shilpi JA. Antibacterial, Anti-Diarrhoeal, Analgesic, Cytotoxic Activities, and GC-MS Profiling of Sonneratia apetala (Buch.-Ham.) Seed. Prev Nutr Food Sci 2017; 22:157-165. [PMID: 29043212 PMCID: PMC5642796 DOI: 10.3746/pnf.2017.22.3.157] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 08/02/2017] [Indexed: 11/30/2022] Open
Abstract
Fruits of Sonneratia apetala (Buch.-Ham.), (English: mangrove apple, Bengali: keora) both seeds and pericarps, are largely consumed as food besides their enormous medicinal application. The fruit seeds have high content of nutrients and bioactive components. The seeds powder of S. apetala was successively fractionated using n-hexane, diethyl ether, chloroform, ethyl acetate, and methanol. The fractions were used to evaluate antibacterial, anti-diarrhoeal, analgesic, and cytotoxic activities. Methanol fraction of seeds (MeS) stronly inhibited Escherichia coli strains, Salmonella Paratyphi A, Salmonella Typhi, Shigella dysenteriae, and Staphylococcus aureus except Vibrio cholerae at 500 μg/disc. All the fractions strongly inhibited castor oil induced diarrhoeal episodes and onset time in mice at 500 mg extract/kg body weight (P<0.001). At the same concentration, MeS had the strongest inhibitory activity on diarrhoeal episodes, whereas the n-hexane fraction (HS) significantly (P<0.05) prolonged diarrhoeal onset time as compared to positive control. Similarly, HS (P<0.005) inhibited acetic acid induced writhing in mice at 500 mg extract/kg, more than any other fraction. HS and diethyl ether fractions of seed strongly increased reaction time of mice in hot plate test at 500 mg extract/kg. All the fractions showed strong cytotoxic effects in brine shrimp lethality tests. Gas chromatography-mass spectrometry analysis of HS led to the identification of 23 compounds. Linoleic acid (29.9%), palmitic acid (23.2%), ascorbyl palmitate (21.2%), and stearic acid (10.5%) were the major compounds in HS. These results suggest that seeds of S. apetala could be of great use as nutraceuticals.
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Affiliation(s)
- Sheikh Julfikar Hossain
- Biotechnology and Genetic Engineering Discipline, Khulna University, Khulna 9208, Bangladesh
| | - M Rabiul Islam
- Biotechnology and Genetic Engineering Discipline, Khulna University, Khulna 9208, Bangladesh
| | - Tahmina Pervin
- Biotechnology and Genetic Engineering Discipline, Khulna University, Khulna 9208, Bangladesh
| | - M Iftekharuzzaman
- Biotechnology and Genetic Engineering Discipline, Khulna University, Khulna 9208, Bangladesh
| | - Omer A A Hamdi
- Department of Chemistry, Faculty of Science and Technology, Al-Neelain University, Khartoum 12702, Sudan
| | - Sanzida Mubassara
- Department of Botany, Jahangirnagar University, Dhaka 1342, Bangladesh
| | - M Saifuzzaman
- Pharmacy Discipline, Khulna University, Khulna 9208, Bangladesh
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19
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Mika M, Wikiera A, Antończyk A, Grabacka M. Food Stabilizing Antioxidants Increase Nutrient Bioavailability in the in Vitro Model. J Am Coll Nutr 2017; 36:579-585. [PMID: 28895793 DOI: 10.1080/07315724.2017.1333930] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVE We investigated whether antioxidants may enhance bioavailability of lipids and carbohydrates and therefore increase the risk of obesity development. METHODS We tested how supplementation with antioxidants (0.01% butylated hydroxytoluene [BHT], α-tocopherol, and green tea catechins) of a diet containing butter and wheat bread affects bioavailability of fats and carbohydrates. The absorption of the in vitro digested diet was estimated in the intestinal epithelia model of the Caco-2 cells cultured in Transwell chambers. RESULTS In the case of the antioxidant-supplemented diets, we observed increased bioavailability of glucose, cholesterol, and lipids, as well as elevated secretion of the main chylomicron protein apoB-48 to the basal compartment. Importantly, we did not detect any rise in the concentrations of lipid peroxidation products (malondialdehyde, MDA) in the control samples prepared without antioxidants. CONCLUSIONS Addition of antioxidants (in particular BHT) to the diet increases bioavailability of lipids and carbohydrates, which consequently may increase the risk of obesity development. The dose of antioxidants is a factor of fundamental importance, particularly for catechins: low doses increase absorption of lipids, whereas high doses exert the opposite effect.
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Affiliation(s)
- Magdalena Mika
- a Department of Food Biotechnology, Faculty of Food Technology , University of Agriculture , Krakow , Poland
| | - Agnieszka Wikiera
- a Department of Food Biotechnology, Faculty of Food Technology , University of Agriculture , Krakow , Poland
| | - Anna Antończyk
- a Department of Food Biotechnology, Faculty of Food Technology , University of Agriculture , Krakow , Poland
| | - Maja Grabacka
- a Department of Food Biotechnology, Faculty of Food Technology , University of Agriculture , Krakow , Poland
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20
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Santos F, Zeoula L, dos Santos G, Lima L, Dias A, Rufino M, Schogor A, De Marchi F, Petit H. Intake, digestibility and milk production and composition of dairy cows fed different levels of Yerba Mate in the diet. Anim Feed Sci Technol 2017. [DOI: 10.1016/j.anifeedsci.2017.05.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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21
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Zhang G, Matsumoto S, Hyon SH, Qualley SA, Upshaw L, Strong DM, Reems JA. Polyphenol, an Extract of Green Tea, Increases Culture Recovery Rates of Isolated Islets from Nonhuman Primate Pancreata and Marginal Grade Human Pancreata. Cell Transplant 2017; 13:145-52. [PMID: 15129760 DOI: 10.3727/000000004773301825] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Investigations indicate that an extract of green tea, polyphenol, can significantly increase the culture survival rate of rat islets without deteriorating their functionality. In this study, we examined the effect of adding polyphenol to islets isolated from human pancreata and nonhuman primate pancreata. Islets were isolated from human pancreata that did not meet criteria for clinical transplantation (n = 6) and from nonhuman primate pancreata (n = 5). The islets were cultured in CMRL-1066 + 10% FCS with the addition of 0, 30, 60, 125, 250, or 500 μg/ml of polyphenol. After 24 or 48 h of culture, islet yield, viability, purity, morphology, and stimulation index was assessed. RT-PCR and Western blot analysis were also performed to assess the expression levels of the apoptotic related genes, Bcl-2 and BAX. After 24 h of culture, islet yields were significantly higher in cultures supplemented with 30–250 μg/ml of polyphenol than in cultures without polyphenol. After 48 h of culture, significant differences in islet numbers were observed with polyphenol concentrations of 125 μg/ml (p < 0.01) and 250 μg/ml (p < 0.01). However, no significant differences were noted in islet viability, purity, morphology, and stimulation index at each time point with or without polyphenol. RT-PCR and Western blot analysis of the islets indicated that Bcl-2 levels increased by 2.5-fold and BAX levels decreased by twofold in cultures supplemented with polyphenol. This resulted in BAX/Bcl-2 ratios that were lower in polyphenol-supplemented cultures than with control cultures. Polyphenol increases culture recovery rates by precluding islet apoptosis.
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Affiliation(s)
- Guangming Zhang
- Northwest Tissue Center at the Puget Sound Blood Center, Seattle, WA 98104, USA
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22
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Polyphenol- and fibre-rich dried fruits with green tea attenuate starch-derived postprandial blood glucose and insulin: a randomised, controlled, single-blind, cross-over intervention. Br J Nutr 2016; 116:443-50. [PMID: 27278405 DOI: 10.1017/s0007114516002221] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Polyphenol- and fibre-rich foods (PFRF) have the potential to affect postprandial glycaemic responses by reducing glucose absorption, and thus decreasing the glycaemic response of foods when consumed together. A randomised, single-blind, cross-over study was conducted on sixteen healthy volunteers to test whether PFRF could attenuate postprandial blood glucose in healthy volunteers when added to a source of carbohydrate (starch in bread). This is the first study to examine the effects of a meal comprised of components to inhibit each stage of the biochemical pathway, leading up to the appearance of glucose in the blood. The volunteers were fasted and attended four visits: two control visits (bread, water, balancing sugars) and two test visits (single and double dose of PFRF) where they consumed bread, water and PFRF. Blood samples were collected at 0 (fasted), 15, 30, 45, 60, 90, 120, 150 and 180 min after consumption. The PFRF components were tested for α-amylase and α-glucosidase inhibitory potential in vitro. Plasma glucose was lower after consumption of both doses compared with controls: lower dose, change in mean incremental areas under the glucose curves (IAUC)=-27·4 (sd 7·5) %, P<0·001; higher dose, IAUC=-49·0 (sd 15·3) %, P<0·001; insulin IAUC was also attenuated by-46·9 (sd 13·4) %, P<0·01. Consistent with this, the polyphenol components of the PFRF inhibited α-amylase (green tea, strawberry, blackberry and blackcurrant) and α-glucosidase (green tea) activities in vitro. The PFRF have a pronounced and significant lowering effect on postprandial blood glucose and insulin response in humans, due in part to inhibition of α-amylase and α-glucosidase, as well as glucose transport.
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Takechi R, Alfonso H, Hiramatsu N, Ishisaka A, Tanaka A, Tan L, Lee AH. Elevated plasma and urinary concentrations of green tea catechins associated with improved plasma lipid profile in healthy Japanese women. Nutr Res 2016; 36:220-6. [DOI: 10.1016/j.nutres.2015.11.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Revised: 11/13/2015] [Accepted: 11/16/2015] [Indexed: 01/05/2023]
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Mechanisms by which cocoa flavanols improve metabolic syndrome and related disorders. J Nutr Biochem 2016; 35:1-21. [PMID: 27560446 DOI: 10.1016/j.jnutbio.2015.12.008] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Revised: 12/17/2015] [Accepted: 12/18/2015] [Indexed: 12/24/2022]
Abstract
Dietary administration of cocoa flavanols may be an effective complementary strategy for alleviation or prevention of metabolic syndrome, particularly glucose intolerance. The complex flavanol composition of cocoa provides the ability to interact with a variety of molecules, thus allowing numerous opportunities to ameliorate metabolic diseases. These interactions likely occur primarily in the gastrointestinal tract, where native cocoa flavanol concentration is high. Flavanols may antagonize digestive enzymes and glucose transporters, causing a reduction in glucose excursion, which helps patients with metabolic disorders maintain glucose homeostasis. Unabsorbed flavanols, and ones that undergo enterohepatic recycling, will proceed to the colon where they can exert prebiotic effects on the gut microbiota. Interactions with the gut microbiota may improve gut barrier function, resulting in attenuated endotoxin absorption. Cocoa may also positively influence insulin signaling, possibly by relieving insulin-signaling pathways from oxidative stress and inflammation and/or via a heightened incretin response. The purpose of this review is to explore the mechanisms that underlie these outcomes, critically review the current body of literature related to those mechanisms, explore the implications of these mechanisms for therapeutic utility, and identify emerging or needed areas of research that could advance our understanding of the mechanisms of action and therapeutic potential of cocoa flavanols.
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Stringer DM, Zahradka P, Taylor CG. Glucose transporters: cellular links to hyperglycemia in insulin resistance and diabetes. Nutr Rev 2016; 73:140-54. [PMID: 26024537 DOI: 10.1093/nutrit/nuu012] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Abnormal expression and/or function of mammalian hexose transporters contribute to the hallmark hyperglycemia of diabetes. Due to different roles in glucose handling, various organ systems possess specific transporters that may be affected during the diabetic state. Diabetes has been associated with higher rates of intestinal glucose transport, paralleled by increased expression of both active and facilitative transporters and a shift in the location of transporters within the enterocyte, events that occur independent of intestinal hyperplasia and hyperglycemia. Peripheral tissues also exhibit deregulated glucose transport in the diabetic state, most notably defective translocation of transporters to the plasma membrane and reduced capacity to clear glucose from the bloodstream. Expression of renal active and facilitative glucose transporters increases as a result of diabetes, leading to elevated rates of glucose reabsorption. However, this may be a natural response designed to combat elevated blood glucose concentrations and not necessarily a direct effect of insulin deficiency. Functional foods and nutraceuticals, by modulation of glucose transporter activity, represent a potential dietary tool to aid in the management of hyperglycemia and diabetes.
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Affiliation(s)
- Danielle M Stringer
- D.M. Stringer was with the Department of Human Nutritional Sciences, University of Manitoba, and the Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Research Centre, Winnipeg, MB, Canada at the time of manuscript preparation. C.G. Taylor is with the Department of Human Nutritional Sciences, University of Manitoba; the Department of Physiology, University of Manitoba; and the Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Research Centre, Winnipeg, Manitoba, Canada. P. Zahradka is with the Department of Human Nutritional Sciences, University of Manitoba; the Department of Physiology, University of Manitoba; and the Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Research Centre, Winnipeg, Manitoba, Canada.
| | - Peter Zahradka
- D.M. Stringer was with the Department of Human Nutritional Sciences, University of Manitoba, and the Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Research Centre, Winnipeg, MB, Canada at the time of manuscript preparation. C.G. Taylor is with the Department of Human Nutritional Sciences, University of Manitoba; the Department of Physiology, University of Manitoba; and the Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Research Centre, Winnipeg, Manitoba, Canada. P. Zahradka is with the Department of Human Nutritional Sciences, University of Manitoba; the Department of Physiology, University of Manitoba; and the Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Research Centre, Winnipeg, Manitoba, Canada
| | - Carla G Taylor
- D.M. Stringer was with the Department of Human Nutritional Sciences, University of Manitoba, and the Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Research Centre, Winnipeg, MB, Canada at the time of manuscript preparation. C.G. Taylor is with the Department of Human Nutritional Sciences, University of Manitoba; the Department of Physiology, University of Manitoba; and the Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Research Centre, Winnipeg, Manitoba, Canada. P. Zahradka is with the Department of Human Nutritional Sciences, University of Manitoba; the Department of Physiology, University of Manitoba; and the Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Research Centre, Winnipeg, Manitoba, Canada
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Weerawatanakorn M, Hung WL, Pan MH, Li S, Li D, Wan X, Ho CT. Chemistry and health beneficial effects of oolong tea and theasinensins. FOOD SCIENCE AND HUMAN WELLNESS 2015. [DOI: 10.1016/j.fshw.2015.10.002] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Hossain SJ, Iftekharuzzaman M, Haque MA, Saha B, Moniruzzaman M, Rahman MM, Hossain H. Nutrient Compositions, Antioxidant Activity, and Common Phenolics ofSonneratia apetala(Buch.-Ham.) Fruit. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2015. [DOI: 10.1080/10942912.2015.1055361] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Huang J, Wang Y, Xie Z, Zhou Y, Zhang Y, Wan X. The anti-obesity effects of green tea in human intervention and basic molecular studies. Eur J Clin Nutr 2014; 68:1075-87. [DOI: 10.1038/ejcn.2014.143] [Citation(s) in RCA: 144] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 05/30/2014] [Accepted: 06/15/2014] [Indexed: 12/14/2022]
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29
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Hossain SJ, Sultana S, Taleb MA, Basar MH, Sarower MG, Hossain A. Antioxidant Activity of Ethanol and Lipophilic Extracts of Common Fruity Vegetables in Bangladesh. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2014. [DOI: 10.1080/10942912.2013.790052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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30
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Snoussi C, Ducroc R, Hamdaoui MH, Dhaouadi K, Abaidi H, Cluzeaud F, Nazaret C, Le Gall M, Bado A. Green tea decoction improves glucose tolerance and reduces weight gain of rats fed normal and high-fat diet. J Nutr Biochem 2014; 25:557-64. [PMID: 24656388 DOI: 10.1016/j.jnutbio.2014.01.006] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Revised: 01/08/2014] [Accepted: 01/20/2014] [Indexed: 12/27/2022]
Abstract
Green tea containing polyphenols exerts antidiabetic and antiobesity effects, but the mechanisms involved are not fully understood. In this study, we first analyzed and compared polyphenol compounds [epigallocatechin gallate (EGCG), epigallocatechin (EGC)] in decoction of green tea leaves versus usual green tea extracts. Second, the effects of acute (30 min) or chronic (6 weeks) oral administration of green tea decoction (GTD) on intestinal glucose absorption were studied in vitro in Ussing chamber, ex vivo using isolated jejunal loops and in vivo through glucose tolerance tests. Finally, we explore in rat model fed normal or high-fat diet the effects of GTD on body weight, blood parameters and on the relative expression of glucose transporters SGLT-1, GLUT2 and GLUT4. GTD cooked for 15 min contained the highest amounts of phenolic compounds. In fasted rats, acute administration of GTD inhibited SGLT-1 activity, increased GLUT2 activity and improved glucose tolerance. Similarly to GTD, acute administration of synthetic phenolic compounds (2/3 EGCG+1/3 EGC) inhibited SGLT-1 activity. Chronic administration of GTD in rat fed high-fat diet reduced body weight gain, circulating triglycerides and cholesterol and improved glucose tolerance. GTD-treated rats for 6 weeks display significantly reduced SGLT-1 and increased GLUT2 mRNA levels in the jejunum mucosa. Moreover, adipose tissue GLUT4 mRNA levels were increased. These results indicate that GTD, a traditional beverage rich in EGCG and EGC reduces intestinal SGLT-1/GLUT2 ratio, a hallmark of regulation of glucose absorption in enterocyte, and enhances adipose GLUT4 providing new insights in its possible role in the control of glucose homeostasis.
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Affiliation(s)
- Chahira Snoussi
- Inserm UMRS1149, UFR de Médecine Paris 7, Université Paris Diderot, Sorbonne Paris Cité, Paris, France; Research Unit on the Antioxidant compounds, Oxidative stress, Trace elements and Metabolic diseases, ESSTST, Tunis, Tunisia
| | - Robert Ducroc
- Inserm UMRS1149, UFR de Médecine Paris 7, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Mohamed Hédi Hamdaoui
- Research Unit on the Antioxidant compounds, Oxidative stress, Trace elements and Metabolic diseases, ESSTST, Tunis, Tunisia
| | | | - Houda Abaidi
- Research Unit on the Antioxidant compounds, Oxidative stress, Trace elements and Metabolic diseases, ESSTST, Tunis, Tunisia
| | - Francoise Cluzeaud
- Inserm UMRS1149, UFR de Médecine Paris 7, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Corinne Nazaret
- Inserm UMRS1149, UFR de Médecine Paris 7, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Maude Le Gall
- Inserm UMRS1149, UFR de Médecine Paris 7, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - André Bado
- Inserm UMRS1149, UFR de Médecine Paris 7, Université Paris Diderot, Sorbonne Paris Cité, Paris, France.
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31
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Tenore GC, Stiuso P, Campiglia P, Novellino E. In vitro hypoglycaemic and hypolipidemic potential of white tea polyphenols. Food Chem 2013; 141:2379-84. [PMID: 23870971 DOI: 10.1016/j.foodchem.2013.04.128] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Revised: 03/12/2013] [Accepted: 04/30/2013] [Indexed: 11/27/2022]
Abstract
The leaves at different processing stages of a single tea cultivar in order to obtain white (WT), green (GT) and black tea (BT) samples, were analysed. The capacities of tea polyphenolics to influence the glucose and lipid metabolism in HepG2 cell lines were evaluated. WT appeared the most active in reducing the glucose and cholesterol uptake (+17.7% and +32.4% in the glucose and cholesterol cell medium concentration, respectively). Incubation with WT enhanced LDL receptor binding activity by 40% (+20% for GT and +0% for BT) and led to an increase in HDL cell medium concentration of 33.3% (+20% for GT and +0% for BT). Finally, WT revealed the best inhibition capacity against lipase activity, and triglyceride levels in the cell medium increased by 400% (+382.6% for GT and +191.3% for BT). The present study intended to contribute to the little knowledge about the potential health benefits of white tea in individuals affected by metabolic syndrome.
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Affiliation(s)
- Gian Carlo Tenore
- Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, 80131 Napoli, Italy.
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32
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Park JH, Choi YJ, Kim YW, Kim SP, Cho HC, Ahn S, Bae KC, Im SS, Bae JH, Song DK. Green tea extract with polyethylene glycol-3350 reduces body weight and improves glucose tolerance in db/db and high-fat diet mice. Naunyn Schmiedebergs Arch Pharmacol 2013; 386:733-45. [PMID: 23620335 DOI: 10.1007/s00210-013-0869-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2012] [Accepted: 04/02/2013] [Indexed: 02/08/2023]
Abstract
Green tea extract (GTE) is regarded to be effective against obesity and type 2 diabetes, but definitive evidences have not been proven. Based on the assumption that the gallated catechins (GCs) in GTE attenuate intestinal glucose and lipid absorption, while enhancing insulin resistance when GCs are present in the circulation through inhibiting cellular glucose uptake in various tissues, this study attempted to block the intestinal absorption of GCs and prolong their residence time in the lumen. We then observed whether GTE containing the nonabsorbable GCs could ameliorate body weight (BW) gain and glucose intolerance in db/db and high-fat diet mice. Inhibition of the intestinal absorption of GCs was accomplished by co-administering the nontoxic polymer polyethylene glycol-3350 (PEG). C57BLKS/J db/db and high-fat diet C57BL/6 mice were treated for 4 weeks with drugs as follows: GTE, PEG, GTE+PEG, voglibose, or pioglitazone. GTE mixed with meals did not have any ameliorating effects on BW gain and glucose intolerance. However, the administration of GTE plus PEG significantly reduced BW gain, insulin resistance, and glucose intolerance, without affecting food intake and appetite. The effect was comparable to the effects of an α-glucosidase inhibitor and a peroxisome proliferator-activated receptor-γ/α agonist. These results indicate that prolonging the action of GCs of GTE in the intestinal lumen and blocking their entry into the circulation may allow GTE to be used as a prevention and treatment for both obesity and obesity-induced type 2 diabetes.
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Affiliation(s)
- Jae-Hyung Park
- Department of Physiology and Endocrinology, Keimyung University School of Medicine, 1095 Dalgubeoldae-Ro, Dalseo-Gu, Daegu, 704-701, South Korea
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33
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A comparative study of antioxidant potential of commonly used antidiabetic plants in Bangladesh. ACTA ACUST UNITED AC 2013. [DOI: 10.1007/s13596-013-0102-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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34
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Park JH, Kim SJ, Hwang I, Bae KC, Bae JH, Song DK. Green Tea Extract Co-administered with a Polymer Effectively Prevents Alcoholic Liver Damage by Prolonged Inhibition of Alcohol Absorption in Mice. Alcohol Alcohol 2012; 48:59-67. [DOI: 10.1093/alcalc/ags118] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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35
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Forester SC, Gu Y, Lambert JD. Inhibition of starch digestion by the green tea polyphenol, (-)-epigallocatechin-3-gallate. Mol Nutr Food Res 2012; 56:1647-54. [PMID: 23038646 DOI: 10.1002/mnfr.201200206] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Revised: 07/30/2012] [Accepted: 08/08/2012] [Indexed: 11/07/2022]
Abstract
SCOPE Green tea has been shown to ameliorate symptoms of metabolic syndrome in vivo. The effects could be due, in part, to modulation of postprandial blood glucose levels. METHODS AND RESULTS We examined the effect of coadministration of (-)-epigallocatechin-3-gallate (EGCG, 100 mg/kg, i.g.) on blood glucose levels following oral administration of common corn starch (CCS), maltose, sucrose, or glucose to fasted CF-1 mice. We found that cotreatment with EGCG significantly reduced postprandial blood glucose levels after administration of CCS compared to control mice (50 and 20% reduction in peak blood glucose levels and blood glucose area under the curve, respectively). EGCG had no effect on postprandial blood glucose following administration of maltose or glucose, suggesting that EGCG may modulate amylase-mediated starch digestion. In vitro, EGCG noncompetitively inhibited pancreatic amylase activity by 34% at 20 μM. No significant change was induced in the expression of two small intestinal glucose transporters (GLUT2 and SGLT1). CONCLUSIONS Our results suggest that EGCG acutely reduces postprandial blood glucose levels in mice when coadministered with CCS and this may be due in part to inhibition of α-amylase. The relatively low effective dose of EGCG makes a compelling case for studies in human subjects.
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Affiliation(s)
- Sarah C Forester
- Center of Excellence for Plant and Mushroom Foods for Health, Department of Food Science, The Pennsylvania State University, University Park, PA 16802, USA
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36
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Pinent M, Cedó L, Montagut G, Blay M, Ardévol A. Procyanidins improve some disrupted glucose homoeostatic situations: an analysis of doses and treatments according to different animal models. Crit Rev Food Sci Nutr 2012; 52:569-84. [PMID: 22530710 DOI: 10.1080/10408398.2010.501533] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This review analyses the potential beneficial effects of procyanidins, the main class of flavonoids, in situations in which glucose homeostasis is disrupted. Because the disruption of glucose homeostasis can occur as a result of various causes, we critically review the effects of procyanidins based on the specific origin of each type of disruption. Where little or no insulin is present (Type I diabetic animals), summarized studies of procyanidin treatment suggest that procyanidins have a short-lived insulin-mimetic effect on the internal targets of the organism, an effect not reproduced in normoglycemic, normoinsulinemic healthy animals. Insulin resistance (usually linked to hyperinsulinemia) poses a very different situation. Preventive studies using fructose-fed models indicate that procyanidins may be useful in preventing the induction of damage and thus in limiting hyperglycemia. But the results of other studies using models such as high-fat diet treated rats or genetically obese animals are controversial. Although the effects on glucose parameters are hazy, it is known that procyanidins target key tissues involved in its homeostasis. Interestingly, all available data suggest that procyanidins are more effective when administered in one acute load than when mixed with food.
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Affiliation(s)
- Montserrat Pinent
- Departament de Bioquímica i Biotecnologia, Universitat Rovira i Virgili (URV), Tarragona, Spain
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37
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Evaluation of antioxidant, antidiabetic and antibacterial activities of the fruit of Sonneratia apetala (Buch.-Ham.). ACTA ACUST UNITED AC 2012. [DOI: 10.1007/s13596-012-0064-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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38
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Affiliation(s)
- Hitoshi AOSHIMA
- Applied Molecular Bioscience, Graduate School of Medicine, Yamaguchi University
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39
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Manzano S, Williamson G. Polyphenols and phenolic acids from strawberry and apple decrease glucose uptake and transport by human intestinal Caco-2 cells. Mol Nutr Food Res 2010; 54:1773-80. [DOI: 10.1002/mnfr.201000019] [Citation(s) in RCA: 194] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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40
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Chen YL, Duan J, Jiang YM, Shi J, Peng L, Xue S, Kakuda Y. Production, Quality, and Biological Effects of Oolong Tea (Camellia sinensis). FOOD REVIEWS INTERNATIONAL 2010. [DOI: 10.1080/87559129.2010.518294] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Yu Long Chen
- a South China Botanical Garden , Chinese Academy of Sciences , Guangzhou , The People's Republic of China
| | - Jun Duan
- a South China Botanical Garden , Chinese Academy of Sciences , Guangzhou , The People's Republic of China
| | - Yue Ming Jiang
- a South China Botanical Garden , Chinese Academy of Sciences , Guangzhou , The People's Republic of China
| | - John Shi
- b Guelph Food Research Center , Agriculture and Agri-Food Canada , Guelph , Ontario , Canada
| | - Litao Peng
- c College of Food Science and Technology , Huazhong Agricultural University , Wuhan , The People's Republic of China
| | - Sophia Xue
- b Guelph Food Research Center , Agriculture and Agri-Food Canada , Guelph , Ontario , Canada
| | - Yukio Kakuda
- d Department of Food Science , University of Guelph , Guelph , Ontario , Canada
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41
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Effect of polyphenols on the intestinal and placental transport of some bioactive compounds. Nutr Res Rev 2010; 23:47-64. [DOI: 10.1017/s0954422410000053] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Polyphenols are a group of widely distributed phytochemicals present in most foods of vegetable origin. A growing number of biological effects have been attributed to these molecules in the past few years and only recently has their interference with the transport capacity of epithelial barriers received attention. This review will present data obtained concerning the effect of polyphenols upon the transport of some compounds (organic cations, glucose and the vitamins thiamin and folic acid) at the intestinal and placental barriers. Important conclusions can be drawn: (i) different classes of polyphenols affect transport of these bioactive compounds at the intestinal epithelia and the placenta; (ii) different compounds belonging to the same phenolic family often possess opposite effects upon transport of a given molecule; (iii) the acute and chronic/short-term and long-term exposures to polyphenols do not produce parallel results and, therefore, care should be taken when extrapolating results; (iv) the effect of polyphenolics in combination may be very different from the expected ones taking into account the effect of each of these compounds alone, and so care should be taken when speculating on the effect of a drink based on the effect of one component only; (v) care should be taken in drawing conclusions for alcoholic beverages from results obtained with ethanol alone. Although most of the data reviewed in the present paper refer to in vitro experiments with cell-culture systems, these studies raise a concern about possible changes in the bioavailability of substrates upon concomitant ingestion of polyphenols.
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42
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Grove KA, Lambert JD. Laboratory, epidemiological, and human intervention studies show that tea (Camellia sinensis) may be useful in the prevention of obesity. J Nutr 2010; 140:446-53. [PMID: 20089791 PMCID: PMC2821884 DOI: 10.3945/jn.109.115972] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2009] [Revised: 11/10/2009] [Accepted: 12/16/2009] [Indexed: 12/18/2022] Open
Abstract
Tea (Camellia sinensis, Theaceae) and tea polyphenols have been studied for the prevention of chronic diseases, including obesity. Obesity currently affects >20% of adults in the United States and is a risk factor for chronic diseases such as type II diabetes, cardiovascular disease, and cancer. Given this increasing public health concern, the use of dietary agents for the prevention of obesity would be of tremendous benefit. Whereas many laboratory studies have demonstrated the potential efficacy of green or black tea for the prevention of obesity, the underlying mechanisms remain unclear. The results of human intervention studies are mixed and the role of caffeine has not been clearly established. Finally, there is emerging evidence that high doses of tea polyphenols may have adverse side effects. Given that the results of scientific studies on dietary components, including tea polyphenols, are often translated into dietary supplements, understanding the potential toxicities of the tea polyphenols is critical to understanding their potential usefulness in preventing obesity. In this review, we will critically evaluate the evidence for the prevention of obesity by tea, discuss the relevance of proposed mechanisms in light of tea polyphenol bioavailability, and review the reports concerning the toxic effects of high doses of tea polyphenols and the implication that this has for the potential use of tea for the prevention of obesity. We hope that this review will expose areas for further study and encourage research on this important public health issue.
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Affiliation(s)
| | - Joshua D. Lambert
- Department of Food Science, The Pennsylvania State University, University Park, PA 16802
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43
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Hossain SJ, El-Sayed M, Aoshima H. Antioxidative and anti-α-amylase activities of four wild plants consumed by pastoral nomads in Egypt. ACTA ACUST UNITED AC 2009. [DOI: 10.3742/opem.2009.9.3.217] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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44
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Hwang J, Lee S, Rha S, Yoon H, Shin J, Lee J, Seo M, Kang K, Han K, Kim Y, Kho K, Kim S, Shin T, Oh M, Oh SJ, Seo H, Kim J. Characterization of angiogenesis inhibitor effect of green tea seed extract. Anim Cells Syst (Seoul) 2009. [DOI: 10.1080/19768354.2009.9647204] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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45
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MUBASSARA S, HOSSAIN SJ, AHMED F, YAMAMOTO M, TAN N, AOSHIMA H. Potentiation of the Response of GABAA Receptors by Bangladeshi Medicinal Plants. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2009. [DOI: 10.3136/fstr.15.315] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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46
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Oliveira DM, Freitas HS, Souza MFF, Arçari DP, Ribeiro ML, Carvalho PO, Bastos DHM. Yerba Maté (Ilex paraguariensis) aqueous extract decreases intestinal SGLT1 gene expression but does not affect other biochemical parameters in alloxan-diabetic Wistar rats. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:10527-10532. [PMID: 18942839 DOI: 10.1021/jf8021404] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Yerba maté (Ilex paraguariensis) is rich in polyphenols, especially chlorogenic acids. Evidence suggests that dietary polyphenols could play a role in glucose absorption and metabolism. The aim of this study was to evaluate the antidiabetic properties of yerba maté extract in alloxan-induced diabetic Wistar rats. Animals (n = 41) were divided in four groups: nondiabetic control (NDC, n = 10), nondiabetic yerba maté (NDY, n = 10), diabetic control (DC, n = 11), and diabetic yerba maté (DY, n = 10). The intervention consisted in the administration of yerba maté extract in a 1 g extract/kg body weight dose for 28 days; controls received saline solution only. There were no significant differences in serum glucose, insulin, and hepatic glucose-6-phosphatase activity between the groups that ingested yerba maté extract (NDY and DY) and the controls (NDC and DC). However, the intestinal SGLT1 gene expression was significantly lower in animals that received yerba maté both in upper (p = 0.007) and middle (p < 0.001) small intestine. These results indicate that bioactive compounds present in yerba maté might be capable of interfering in glucose absorption, by decreasing SGLT1 expression.
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Affiliation(s)
- Daniela M Oliveira
- Nutrition Department, School of Public Health, University of São Paulo, São Paulo, Brazil
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47
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Wang Z, Clifford MN, Sharp P. Analysis of chlorogenic acids in beverages prepared from Chinese health foods and investigation, in vitro, of effects on glucose absorption in cultured Caco-2 cells. Food Chem 2008. [DOI: 10.1016/j.foodchem.2007.10.083] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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48
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HOSSAIN SJ, TSUJIYAMA I, TAKASUGI M, ISLAM MA, BISWAS RS, AOSHIMA H. Total Phenolic Content, Antioxidative, Anti-amylase, Anti-glucosidase, and Antihistamine Release Activities of Bangladeshi Fruits. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2008. [DOI: 10.3136/fstr.14.261] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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49
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Hossain SJ, Aoshima H, Koda H, Kiso Y. Review of Functional Studies of Beverage Components Acting on the Recombinant GABAANeuroreceptor, and Na+/Glucose Cotransporter-Response Using theXenopusOocyte Expression System and Electrophysiological Measurements. FOOD BIOTECHNOL 2007. [DOI: 10.1080/08905430701534081] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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50
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Abstract
A major challenge associated with the development of chemopreventive polyphenols is the lack of bioavailability in vivo, which are primarily the result of coupled metabolic activities of conjugating enzymes and efflux transporters. These coupling processes are present in disposition tissues and organs in mammals and are efficient for the purposes of drug metabolism, elimination and detoxification. Therefore, it was expected that these coupling processes represent a significant barrier to the oral bioavailabilities of polyphenols. In various studies of this coupling process, it was identified that various conjugating enzymes such as uridine 5'-diphosphate-glucuronosyltransferase and sulfotransferase are capable of producing very hydrophilic metabolites of polyphenols, which cannot diffuse out of the cells and needs the action of efflux transporters to pump them out of the cells. Additional studies have shown that efflux transporters, such as multi-drug resistance-associated protein 2, breast cancer-resistant protein and the organic anion transporters, appear to serve as the gate keeper when there is an excess capacity to metabolise the compounds. These efflux transporters may also act as the facilitator of metabolism when there is a product/metabolite inhibition. For polyphenols, these coupled processes enable a duo recycling scheme of enteric and enterohepatic recycling, which allows the polyphenols to be reabsorbed and results in longer than expected apparent plasma half-lifes for these compounds and their conjugates. Because the vast majority of polyphenols in plasma are hydrophilic conjugates, more research is needed to determine if the metabolites are active or reactive, which will help explain their mechanism of actions.
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Affiliation(s)
- Zhongqiu Liu
- Hong Kong Baptist University, School of Chinese Medicine, Hong Kong, China
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