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Nagle CM, Ibiebele TI, Bandera EV, Cramer D, Doherty JA, Giles GG, Goodman MT, Hanley GE, Harris HR, Jensen A, Kjaer SK, Lee AW, Milne RL, Qin B, Richardson J, Sasamoto N, Sieh W, Terry KL, Titus L, Trabert B, Wentzensen N, Wu AH, Berchuck A, Pike M, Pearce CL, Webb PM. Pre-diagnosis tea and coffee consumption and survival after a diagnosis of ovarian cancer: results from the Ovarian Cancer Association Consortium. Br J Cancer 2024:10.1038/s41416-024-02792-7. [PMID: 39026080 DOI: 10.1038/s41416-024-02792-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 06/20/2024] [Accepted: 07/02/2024] [Indexed: 07/20/2024] Open
Abstract
BACKGROUND Tea and coffee are the most frequently consumed beverages in the world. Green tea in particular contains compounds with potential anti-cancer effects, but its association with survival after ovarian cancer is uncertain. METHODS We investigated the associations between tea and coffee consumption before diagnosis and survival using data from 10 studies in the Ovarian Cancer Association Consortium. Data on tea (green, black, herbal), coffee and caffeine intake were available for up to 5724 women. We used Cox proportional hazards regression to estimate adjusted hazard ratios (aHR) and 95% confidence intervals (CI). RESULTS Compared with women who did not drink any green tea, consumption of one or more cups/day was associated with better overall survival (aHR = 0.84, 95% CI 0.71-1.00, p-trend = 0.04). A similar association was seen for ovarian cancer-specific survival in five studies with this information (aHR = 0.81, 0.66-0.99, p-trend = 0.045). There was no consistent variation between subgroups defined by clinical or lifestyle characteristics and adjustment for other aspects of lifestyle did not appreciably alter the estimates. We found no evidence of an association between coffee, black or herbal tea, or caffeine intake and survival. CONCLUSION The observed association with green tea consumption before diagnosis raises the possibility that consumption after diagnosis might improve patient outcomes.
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Grants
- NIH-K07-CA095666, R01-CA83918, NIH-K22-CA138563, P30-CA072720 U.S. Department of Health & Human Services | National Institutes of Health (NIH)
- R01-CA54419, P50-CA105009 U.S. Department of Health & Human Services | National Institutes of Health (NIH)
- R01-CA112523, R01-CA87538 U.S. Department of Health & Human Services | National Institutes of Health (NIH)
- R01-CA58598, N01-CN-55424, N01-PC-67001 U.S. Department of Health & Human Services | National Institutes of Health (NIH)
- R01-CA61107 U.S. Department of Health & Human Services | National Institutes of Health (NIH)
- R01-CA61107 U.S. Department of Health & Human Services | National Institutes of Health (NIH)
- R01-CA54419, P50-CA105009 U.S. Department of Health & Human Services | National Institutes of Health (NIH)
- P01-CA17054, P30-CA14089, R01-CA61132, N01-PC67010, R03-CA113148, R03-CA115195, N01-CN025403 U.S. Department of Health & Human Services | National Institutes of Health (NIH)
- Rutgers Cancer Institute of New Jersey (Cancer Institute of New Jersey)
- W81XWH-10-1-02802 U.S. Department of Defense (United States Department of Defense)
- W81XWH-10-1-02802 U.S. Department of Defense (United States Department of Defense)
- 209057, 396414, 1074383 Department of Health | National Health and Medical Research Council (NHMRC)
- 209057, 396414, 1074383 Department of Health | National Health and Medical Research Council (NHMRC)
- Intramural Research Program U.S. Department of Health & Human Services | NIH | NCI | Division of Cancer Epidemiology and Genetics, National Cancer Institute (National Cancer Institute Division of Cancer Epidemiology and Genetics)
- W81XSH-16-2-0010 United States Department of Defense | United States Army | Army Medical Command | Congressionally Directed Medical Research Programs (CDMRP)
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Affiliation(s)
- Christina M Nagle
- Gynaecological Cancers Group, Population Health Program, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia
| | - Torukiri I Ibiebele
- Gynaecological Cancers Group, Population Health Program, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia
| | - Elisa V Bandera
- Cancer Epidemiology and Health Outcomes, Rutgers Cancer Institute, New Brunswick, NJ, USA
| | - Daniel Cramer
- Obstetrics and Gynecology Epidemiology Center, Department of Obstetrics and Gynecology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
- Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Jennifer A Doherty
- Huntsman Cancer Institute, Department of Population Health Sciences, University of Utah, Salt Lake City, UT, USA
| | - Graham G Giles
- Cancer Epidemiology Division, Cancer Council Victoria, Melbourne, VIC, Australia
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, VIC, Australia
- Precision Medicine, School of Clinical Sciences at Monash Health, Monash University, Clayton, VIC, Australia
| | - Marc T Goodman
- Cancer Prevention and Control Program, Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
- Community and Population Health Research Institute, Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Gillian E Hanley
- University of British Columbia, Department of Obstetrics & Gynaecology, Vancouver, BC, Canada
| | - Holly R Harris
- Program in Epidemiology, Division of Public Health Sciences, Fred Hutchinson Cancer Center, Seattle, WA, USA
- Department of Epidemiology, School of Public Health, University of Washington, Seattle, WA, USA
| | - Allan Jensen
- Department of Virus, Lifestyle and Genes, Danish Cancer Institute, Copenhagen, Denmark
| | - Susanne K Kjaer
- Department of Virus, Lifestyle and Genes, Danish Cancer Institute, Copenhagen, Denmark
- Department of Gynecology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Alice W Lee
- Department of Public Health, California State University, Fullerton, Fullerton, CA, USA
| | - Roger L Milne
- Cancer Epidemiology Division, Cancer Council Victoria, Melbourne, VIC, Australia
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, VIC, Australia
- Precision Medicine, School of Clinical Sciences at Monash Health, Monash University, Clayton, VIC, Australia
| | - Bo Qin
- Cancer Epidemiology and Health Outcomes, Rutgers Cancer Institute, New Brunswick, NJ, USA
| | - Jean Richardson
- Department of Population and Public Health Sciences, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Naoko Sasamoto
- Obstetrics and Gynecology Epidemiology Center, Department of Obstetrics and Gynecology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Weiva Sieh
- Department of Epidemiology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Kathryn L Terry
- Obstetrics and Gynecology Epidemiology Center, Department of Obstetrics and Gynecology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
- Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Linda Titus
- Department of Epidemiology, Geisel School of Medicine at Dartmouth, Hanover, NH, USA
| | - Britton Trabert
- Metabolic Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD, USA
- Department of Obstetrics and Gynecology, University of Utah, Huntsman Cancer Institute, Salt Lake City, UT, USA
| | - Nicolas Wentzensen
- Clinical Genetics Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD, USA
| | - Anna H Wu
- Department of Population and Public Health Sciences, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Andrew Berchuck
- Division of Gynecologic Oncology, Duke University School of Medicine, Durham, NC, USA
| | - Malcolm Pike
- Department of Population and Public Health Sciences, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
- Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Celeste Leigh Pearce
- Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor, MI, USA
| | - Penelope M Webb
- Gynaecological Cancers Group, Population Health Program, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia.
- University of Queensland, School of Public Health, Brisbane, QLD, Australia.
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2
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Wnuk E, Zwolak I, Kochanowicz E. The physiological levels of epigallocatechin gallate (EGCG) enhance the Cd-induced oxidative stress and apoptosis in CHO-K1 cells. Sci Rep 2024; 14:13625. [PMID: 38871787 DOI: 10.1038/s41598-024-64478-7] [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: 01/25/2024] [Accepted: 06/10/2024] [Indexed: 06/15/2024] Open
Abstract
Currently, the increasing pollution of the environment by heavy metals is observed, caused both by natural factors and those related to human activity. They pose a significant threat to human health and life. It is therefore important to find an effective way of protecting organisms from their adverse effects. One potential product showing a protective effect is green tea. It has been shown that EGCG, which is found in large amounts in green tea, has strong antioxidant properties and can therefore protect cells from the adverse effects of heavy metals. Therefore, the aim of the study was to investigate the effect of EGCG on cells exposed to Cd. In the study, CHO-K1 cells (Chinese hamster ovary cell line) were treated for 24 h with Cd (5 and 10 µM) and EGCG (0.5 and 1 µM) together or separately. Cell viability, ATP content, total ROS activity, mitochondrial membrane potential and apoptosis potential were determined. The results showed that, in tested concentrations, EGCG enhanced the negative effect of Cd. Further analyses are needed to determine the exact mechanism of action of EGCG due to the small number of publications on the subject and the differences in the results obtained in the research.
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Affiliation(s)
- Ewa Wnuk
- Department of Biomedicine and Environmental Research, Institute of Biological Sciences, Faculty Medicine, The John Paul II Catholic University of Lublin, Konstantynów Ave. 1J, 20-708, Lublin, Poland.
| | - Iwona Zwolak
- Department of Biomedicine and Environmental Research, Institute of Biological Sciences, Faculty Medicine, The John Paul II Catholic University of Lublin, Konstantynów Ave. 1J, 20-708, Lublin, Poland
| | - Elzbieta Kochanowicz
- Department of Molecular Biology, Institute of Biological Sciences, Faculty of Medicine, The John Paul II Catholic University of Lublin, Konstantynów Ave. 1I, 20-708, Lublin, Poland
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3
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Zhang X, Huo Z, Jia X, Xiong Y, Li B, Zhang L, Li X, Li X, Fang Y, Dong X, Chen G. (+)-Catechin ameliorates diabetic nephropathy injury by inhibiting endoplasmic reticulum stress-related NLRP3-mediated inflammation. Food Funct 2024; 15:5450-5465. [PMID: 38687305 DOI: 10.1039/d3fo05400d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Endoplasmic reticulum (ER) stress and chronic sterile inflammation are associated with the pathogenesis of diabetic nephropathy (DN). Catechins are natural polyphenolic compounds found in green tea that possess some health benefits. However, whether (+)-catechin can reduce tubular injury in DN by regulating ER stress and NLRP3-associated inflammation remains uncertain. This study examined the effects of (+)-catechin on streptozotocin (STZ)-induced diabetic mice and on palmitic acid (PA)-treated HK-2 cells. In vivo, a DN mouse model was generated by injecting STZ. The biochemical indicators of serum and urine, as well as renal histopathology and ultrastructure were analysed. To predict the mechanisms associated with (+)-catechin, network pharmacology and molecular docking were used. Finally, quantitative real-time PCR (qPCR), western blot analysis and immunofluorescence analysis were performed to measure the mRNA and protein expressions of specific targets in the renal tissue of DN mice and PA-treated HK-2 cells to validate the predicted results. (+)-Catechin significantly ameliorated renal function and pathological changes associated with tubular injury by inhibiting ER stress by downregulating of GRP78, PEAK, CHOP, ATF6 and XBP1. In addition, (+)-catechin inhibited renal inflammation by suppressing NLRP3 associated inflammation, which was characterized by the downregulation of NLRP3, ASC, AIM2, Caspase1, IL-1β and IL-18 in DN mice and PA-treated HK-2 cells. Collectively, these findings suggested that (+)-catechin exerted a renoprotective effect against DN by inhibiting ER stress and NLRP3-related inflammation to ameliorate tubular injury, suggesting the therapeutic potential of (+)-catechin.
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Affiliation(s)
- Xiwen Zhang
- Guangzhou University of Traditional Chinese Medicine, Guangzhou, China
| | - Zhihao Huo
- Guangdong Clinical Research Academy of Chinese Medicine, Department of Nephrology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China.
| | - Xiaotong Jia
- Guangzhou University of Traditional Chinese Medicine, Guangzhou, China
| | - Yuanyuan Xiong
- Guangzhou University of Traditional Chinese Medicine, Guangzhou, China
| | - Baohua Li
- Baiyun Hospital of The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Liangyou Zhang
- Guangdong Clinical Research Academy of Chinese Medicine, Department of Nephrology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China.
| | - Xin Li
- Shenzhen Hospital of Guangzhou University of Chinese Medicine (Futian), Shenzhen, China
| | - Xianhong Li
- Guangdong Clinical Research Academy of Chinese Medicine, Department of Nephrology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China.
| | - Yinrui Fang
- Guangzhou University of Traditional Chinese Medicine, Guangzhou, China
| | - Xin Dong
- Guangdong Clinical Research Academy of Chinese Medicine, Department of Nephrology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China.
| | - Gangyi Chen
- Guangdong Clinical Research Academy of Chinese Medicine, Department of Nephrology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China.
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4
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Banerjee S, Chowdhury CR, Das D. Relationship of Diet and Addiction with Gall Bladder Carcinoma-a Case-Control Study at a Tertiary Health Care Centre, India. Indian J Surg Oncol 2024; 15:238-248. [PMID: 38817989 PMCID: PMC11133298 DOI: 10.1007/s13193-021-01480-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 11/16/2021] [Indexed: 10/19/2022] Open
Abstract
Some dietary elements, tobacco use, have long been suspected as risk factors for gall bladder carcinoma. The objective of the study was to describe the dietary pattern of the patients with gall bladder carcinoma and to compare the dietary ingredients, and addiction between the cases and controls. Fifty-six gall bladder carcinoma cases and 56 matched controls were compared for diet and addiction patterns. Fried food, junk food, vanaspati, frozen fish, dried fish, red meat, kheer, milled mustard oil, puffed rice containing urea, chili powder, less water consumption, extra salt, tobacco exposure, betel leaf, and alcohol consumption were significantly related with gall bladder carcinoma. Green tea, sunflower oil, butter, ghee, fish intake more than twice weekly, sea fish, packaged milk, some fruits, and vegetables were found protective. Some dietary elements and addiction are related to gall bladder carcinoma, whereas some food items have a protective role.
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Affiliation(s)
- Sandipta Banerjee
- Medical College, 88, College Street, Kolkata, West Bengal 700073 India
| | | | - Debasis Das
- Department of Community Medicine, Medical College, Kolkata, India
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5
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Sandomierski M, Chojnacka M, Ratajczak M, Voelkel A. Zeolites with Divalent Ions as Carriers in the Delivery of Epigallocatechin Gallate. ACS Biomater Sci Eng 2023; 9:5322-5331. [PMID: 37540564 PMCID: PMC10498421 DOI: 10.1021/acsbiomaterials.3c00599] [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: 05/05/2023] [Accepted: 07/25/2023] [Indexed: 08/06/2023]
Abstract
Epigallocatechin gallate (EGCG) is a compound with very high therapeutic potential in the treatment of osteoporosis and cancer. The disadvantages of this compound are its low stability and low bioavailability. Therefore, carriers for EGCG are sought to increase its use. In this work, new carriers are proposed, i.e., zeolites containing divalent ions of magnesium, calcium, strontium, and zinc in their structure. EGCG is retained on the carrier surface by strong interactions with divalent ions. Due to the presence of strong interactions, EGCG is released in a controlled manner from the carrier-ion-EGCG drug delivery system. The results obtained in this work confirm the effectiveness of the preparation of new carriers. EGCG is released from the carriers depending on the pH; hence, it can be used both in osteoporosis and in the treatment of cancer. The divalent ion used affects the sorption and release of the drug. The obtained results indicate the great potential of the proposed carriers and their advantage over the carriers described in the literature.
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Affiliation(s)
- Mariusz Sandomierski
- Institute
of Chemical Technology and Engineering, Poznan University of Technology, ul. Berdychowo 4, 60-965 Poznań, Poland
| | - Martyna Chojnacka
- Institute
of Chemical Technology and Engineering, Poznan University of Technology, ul. Berdychowo 4, 60-965 Poznań, Poland
| | - Maria Ratajczak
- Institute
of Building Engineering, Poznan University
of Technology, ul. Piotrowo
5, 60-965 Poznań, Poland
| | - Adam Voelkel
- Institute
of Chemical Technology and Engineering, Poznan University of Technology, ul. Berdychowo 4, 60-965 Poznań, Poland
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6
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Romers T, Saurina J, Sentellas S, Núñez O. Targeted HPLC-UV Polyphenolic Profiling to Detect and Quantify Adulterated Tea Samples by Chemometrics. Foods 2023; 12:foods12071501. [PMID: 37048322 PMCID: PMC10094304 DOI: 10.3390/foods12071501] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 03/27/2023] [Accepted: 03/30/2023] [Indexed: 04/05/2023] Open
Abstract
Tea can be found among the most widely consumed beverages, but it is also highly susceptible to fraudulent practices of adulteration with other plants such as chicory to obtain an illicit economic gain. Simple, feasible and cheap analytical methods to assess tea authentication are therefore required. In the present contribution, a targeted HPLC-UV method for polyphenolic profiling, monitoring 17 polyphenolic and phenolic acids typically described in tea, was proposed to classify and authenticate tea samples versus chicory. For that purpose, the obtained HPLC-UV polyphenolic profiles (based on the peak areas at three different acquisition wavelengths) were employed as sample chemical descriptors for principal component analysis (PCA) and partial least squares-discriminant analysis (PLS-DA) studies. Overall, PLS-DA demonstrated good sample grouping and discrimination of chicory against any tea variety, but also among the five different tea varieties under study, with classification errors below 8% and 10.5% for calibration and cross-validation, respectively. In addition, the potential use of polyphenolic profiles as chemical descriptors to detect and quantify frauds was evaluated by studying the adulteration of each tea variety with chicory, as well as the adulteration of red tea extracts with oolong tea extracts. Excellent results were obtained in all cases, with calibration, cross-validation, and prediction errors below 2.0%, 4.2%, and 3.9%, respectively, when using chicory as an adulterant, clearly improving on previously reported results when using non-targeted HPLC-UV fingerprinting methodologies.
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Affiliation(s)
- Thom Romers
- Department of Chemical Engineering and Analytical Chemistry, Universitat de Barcelona, Martí i Franquès 1-11, E08028 Barcelona, Spain
| | - Javier Saurina
- Department of Chemical Engineering and Analytical Chemistry, Universitat de Barcelona, Martí i Franquès 1-11, E08028 Barcelona, Spain
- Research Institute in Food Nutrition and Food Safety, Universitat de Barcelona, Av. Prat de la Riba 171, Edifici Recerca (Gaudí), E08921 Santa Coloma de Gramenet, Spain
| | - Sònia Sentellas
- Department of Chemical Engineering and Analytical Chemistry, Universitat de Barcelona, Martí i Franquès 1-11, E08028 Barcelona, Spain
- Research Institute in Food Nutrition and Food Safety, Universitat de Barcelona, Av. Prat de la Riba 171, Edifici Recerca (Gaudí), E08921 Santa Coloma de Gramenet, Spain
- Serra Húnter Fellow, Departament de Recerca i Universitats, Generalitat de Catalunya, Via Laietana 2, E08003 Barcelona, Spain
| | - Oscar Núñez
- Department of Chemical Engineering and Analytical Chemistry, Universitat de Barcelona, Martí i Franquès 1-11, E08028 Barcelona, Spain
- Research Institute in Food Nutrition and Food Safety, Universitat de Barcelona, Av. Prat de la Riba 171, Edifici Recerca (Gaudí), E08921 Santa Coloma de Gramenet, Spain
- Serra Húnter Fellow, Departament de Recerca i Universitats, Generalitat de Catalunya, Via Laietana 2, E08003 Barcelona, Spain
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7
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Wilson T, Bendich A. Nutrition Guidelines for Improved Clinical Care. Med Clin North Am 2022; 106:819-836. [PMID: 36154702 PMCID: PMC9046061 DOI: 10.1016/j.mcna.2022.04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Given the importance of poor nutrition as a cause for human chronic disease, it is surprising that nutrition receives so little attention during medical school training and in clinical practice. Specific vitamins, minerals, fatty acids, amino acids and water in the diet are essential for health, and deficiencies lead or contribute to many diseases. Proper use of the dietary guidelines and nutrition facts labeling can improve nutritional status and lead to the consumption of a healthy diet. COVID-19 has altered access to nutritious foods for millions and increased awareness of the importance of diet and immune function. An improved appreciation for nutrition will improve the outcomes of clinical care.
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Affiliation(s)
- Ted Wilson
- Department of Biology, Winona State University, Rm 232, Pasteur Hall, Winona, MN 55987, USA.
| | - Adrianne Bendich
- Springer/Nature Nutrition and Health Book Series Editor, retired, 8765 Via Brilliante Wellington, FL 33411, USA
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8
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Multifaceted neuroprotective effects of (-)-epigallocatechin-3-gallate (EGCG) in Alzheimer’s disease: an overview of pre-clinical studies focused on β-amyloid peptide. FOOD SCIENCE AND HUMAN WELLNESS 2022. [DOI: 10.1016/j.fshw.2021.12.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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9
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The Association between Habitual Green Tea Consumption and Comprehensive Frailty as Assessed by Kihon Checklist Indexes among an Older Japanese Population. Nutrients 2021; 13:nu13114149. [PMID: 34836404 PMCID: PMC8619869 DOI: 10.3390/nu13114149] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 11/12/2021] [Accepted: 11/16/2021] [Indexed: 11/27/2022] Open
Abstract
Background: It is unclear whether habitual green tea consumption is related to comprehensive frailty. Objectives: We conducted this study to investigate this relationship among an elderly Japanese population. Methods: This was a cross-sectional study of baseline data from 2012. The study included 5668 Japanese participants (2766 men and 2902 women aged 65 years or older). The subjects completed a validated self-administered food frequency questionnaire that included questions on their green tea consumption. We evaluated comprehensive frailty using a 25-item Kihon Checklist (KCL), which comprised seven domains (instrumental activities of daily living (IADL), physical function, malnutrition, oral or eating function, socialization and housebound, cognitive function, and depression). Frailty was defined as a KCL score greater than or equal to seven. Results: We found that a higher consumption of green tea was associated with a lower prevalence of comprehensive frailty in both sexes. Further age-stratified analysis showed that a higher consumption of green tea among women was associated with a lower prevalence of comprehensive frailty, regardless of age. In men, however, this association was found only in the older age groups. An analysis of the association between green tea consumption and the frailty subdomains showed that green tea consumption was associated with a lower prevalence of oral dysfunction and cognitive problems in both sexes. In addition, only in women was higher green tea consumption found to be associated with a lower prevalence of IADL and mobility-related disability problems. Conclusions: Green tea consumption is inversely associated with the prevalence of comprehensive frailty in Japanese men and women. Longitudinal studies are required to confirm this association.
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10
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Kazi J, Sen R, Ganguly S, Jha T, Ganguly S, Chatterjee Debnath M. Folate decorated epigallocatechin-3-gallate (EGCG) loaded PLGA nanoparticles; in-vitro and in-vivo targeting efficacy against MDA-MB-231 tumor xenograft. Int J Pharm 2020; 585:119449. [PMID: 32464231 DOI: 10.1016/j.ijpharm.2020.119449] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 05/13/2020] [Accepted: 05/18/2020] [Indexed: 12/15/2022]
Abstract
Epigallocatechin-3-gallate (EGCG), a major polyphenolic constituent of green tea exhibits significant anti-cancer potential over a wide range of cancer cells. We have developed folate peptide decorated PLGA-NPs loaded with EGCG (FP-EGCG-NPs) to bind folate receptor (FR) specific breast cancer cell lines and evaluated their efficacy in pre-clinical studies. EGCG loaded PLGA nanoparticles (EGCG-NPs) were characterised for size, surface morphology, surface charge, encapsulation efficacy and in-vitro drug release kinetics. Cellular uptake and in-vitro cytotoxicities of free drug, folate peptide conjugated and unconjugated EGCG-NPs were investigated against FR positive MDA-MB-231 and MCF-7 cells. The conjugated nanoparticles exhibited promising cytotoxic potentials as well as significantly high cellular internalisation in MDA-MB-231 cells as compared to unconjugated one. It also ensured longer half life, higher plasma concentration, favourably high apoptotic potential and significantly high mitochondrial depolarization effect as compared to free EGCG. The loaded nanoparticles were radiolabeled with technetium-99m and their tumor selectivity in MDA-MB-231 tumor bearing nude mice was investigated by scintigraphic imaging study. Finally in-vivo therapeutic efficacy studies in tumor bearing nude mice were also done to evaluate the efficacy of the formulation for cancer treatment.
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Affiliation(s)
- Julekha Kazi
- Infectious Diseases and Immunology Division, CSIR-Indian Institute of Chemical Biology, Kolkata, India
| | - Ramkrishna Sen
- Infectious Diseases and Immunology Division, CSIR-Indian Institute of Chemical Biology, Kolkata, India
| | - Soumya Ganguly
- Infectious Diseases and Immunology Division, CSIR-Indian Institute of Chemical Biology, Kolkata, India
| | - Tarun Jha
- Department of Pharmaceutical Technology, Jadavpur University, Kolkata, India
| | - Shantanu Ganguly
- Regional Radiation Medicine Center, Thakurpukur Cancer Center and Welfare Home Campus, Kolkata, India
| | - Mita Chatterjee Debnath
- Infectious Diseases and Immunology Division, CSIR-Indian Institute of Chemical Biology, Kolkata, India.
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11
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Guo Z, Yang Y, Shu Y, Qiao L, Peng M, Wang Z. Stimulus-responsive tea polyphenols as nanocarrier for selective intracellular drug delivery. J Biomater Appl 2020; 35:149-157. [PMID: 32390570 DOI: 10.1177/0885328220924539] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Nanodrug delivery systems have been widely researched to achieve efficient antitumor drug delivery. However, the controlled drug delivery at tumor cells remains the main challenge for antitumor therapy. Herein, a pH and reduction-responsive nanocarrier based on green tea polyphenols was employed as a smart excipient for chemotherapy drug delivery. Paclitaxel, as a chemotherapy drug, was loaded in the nanocarrier, noted as green tea polyphenol/paclitaxel. The green tea polyphenol/paclitaxel kept constant diameter at physiological condition (i.e. pH 7.4), while gradually enlarged at acid environment (pH = 5.5) and the reductive environment. The in vitro paclitaxel release results indicated that the release of paclitaxel from the green tea polyphenol/paclitaxel at pH 7.4 was slow, whereas obviously accelerated at the acid environment (pH = 5.5) and the reductive environment. The in vitro antitumor assay showed more efficient tumor cells inhibition of green tea polyphenol/paclitaxel than free paclitaxel. Meanwhile, due to the proper size (∼100 nm), green tea polyphenol/paclitaxel could effectively accumulate at tumor sites. In the in vivo mice bearing A549 xenograft mouse models, green tea polyphenol/paclitaxel exhibited satisfactory antitumor effect and depressed system toxicity when compared with free paclitaxel, owing to the enhanced paclitaxel accumulation and controlled paclitaxel release in the tumor cells. With simple compositions and satisfactory antitumor effects, this green tea polyphenol-based nanocarrier can be a promising nanodrug delivery system for the therapy of cancers.
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Affiliation(s)
- Zhiheng Guo
- Department of Obstetrics, The First Hospital of Jilin University, Changchun, China
| | - Yi Yang
- Department of the Center for Reproductive Medicine, The First Hospital of Jilin University, Changchun, China
| | - Yang Shu
- Department of Obstetrics, The First Hospital of Jilin University, Changchun, China
| | - Li Qiao
- Department of Gynecological II, The First Hospital of Jilin University, Changchun, China
| | - Min Peng
- Department of Obstetrics, The First Hospital of Jilin University, Changchun, China
| | - Zhenpeng Wang
- Department of Gynecologic Oncologic, The First Hospital of Jilin University, Changchun, China
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12
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Pervin M, Unno K, Takagaki A, Isemura M, Nakamura Y. Function of Green Tea Catechins in the Brain: Epigallocatechin Gallate and its Metabolites. Int J Mol Sci 2019; 20:ijms20153630. [PMID: 31349535 PMCID: PMC6696481 DOI: 10.3390/ijms20153630] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 07/22/2019] [Accepted: 07/22/2019] [Indexed: 12/11/2022] Open
Abstract
Over the last three decades, green tea has been studied for its beneficial effects, including anti-cancer, anti-obesity, anti-diabetes, anti-inflammatory, and neuroprotective effects. At present, a number of studies that have employed animal, human and cell cultures support the potential neuroprotective effects of green tea catechins against neurological disorders. However, the concentration of (−)-epigallocatechin gallate (EGCG) in systemic circulation is very low and EGCG disappears within several hours. EGCG undergoes microbial degradation in the small intestine and later in the large intestine, resulting in the formation of various microbial ring-fission metabolites which are detectable in the plasma and urine as free and conjugated forms. Recently, in vitro experiments suggested that EGCG and its metabolites could reach the brain parenchyma through the blood–brain barrier and induce neuritogenesis. These results suggest that metabolites of EGCG may play an important role, alongside the beneficial activities of EGCG, in reducing neurodegenerative diseases. In this review, we discuss the function of EGCG and its microbial ring-fission metabolites in the brain in suppressing brain dysfunction. Other possible actions of EGCG metabolites will also be discussed.
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Affiliation(s)
- Monira Pervin
- Tea Science Center, Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, Shizuoka 422-8526, Japan.
| | - Keiko Unno
- Tea Science Center, Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, Shizuoka 422-8526, Japan.
| | - Akiko Takagaki
- R&D group, Mitsui Norin Co. Ltd., Shizuoka 426-0133, Japan
| | - Mamoru Isemura
- Tea Science Center, Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, Shizuoka 422-8526, Japan
| | - Yoriyuki Nakamura
- Tea Science Center, Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, Shizuoka 422-8526, Japan
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Nakano S, Megro SI, Hase T, Suzuki T, Isemura M, Nakamura Y, Ito S. Computational Molecular Docking and X-ray Crystallographic Studies of Catechins in New Drug Design Strategies. Molecules 2018; 23:E2020. [PMID: 30104534 PMCID: PMC6222539 DOI: 10.3390/molecules23082020] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 08/09/2018] [Accepted: 08/11/2018] [Indexed: 12/16/2022] Open
Abstract
Epidemiological and laboratory studies have shown that green tea and green tea catechins exert beneficial effects on a variety of diseases, including cancer, metabolic syndrome, infectious diseases, and neurodegenerative diseases. In most cases, (-)-epigallocatechin gallate (EGCG) has been shown to play a central role in these effects by green tea. Catechins from other plant sources have also shown health benefits. Many studies have revealed that the binding of EGCG and other catechins to proteins is involved in its action mechanism. Computational docking analysis (CMDA) and X-ray crystallographic analysis (XCA) have provided detailed information on catechin-protein interactions. Several of these studies have revealed that the galloyl moiety anchors it to the cleft of proteins through interactions with its hydroxyl groups, explaining the higher activity of galloylated catechins such as EGCG and epicatechin gallate than non-galloylated catechins. In this paper, we review the results of CMDA and XCA of EGCG and other plant catechins to understand catechin-protein interactions with the expectation of developing new drugs with health-promoting properties.
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Affiliation(s)
- Shogo Nakano
- School of Food and Nutritional Sciences, Shizuoka University, Yada, Shizuoka 422-8526, Japan.
| | - Shin-Ichi Megro
- Biological Science Research, Kao Corporation, Ichikai-machi, Haga-gun, Tochigi 321-3497, Japan.
| | - Tadashi Hase
- Research and Development, Core Technology, Kao Corporation, Sumida, Tokyo 131-8501, Japan.
| | - Takuji Suzuki
- Faculty of Education, Art and Science, Yamagata University, Yamagata 990-8560, Japan.
| | - Mamoru Isemura
- School of Food and Nutritional Sciences, Shizuoka University, Yada, Shizuoka 422-8526, Japan.
| | - Yoriyuki Nakamura
- School of Food and Nutritional Sciences, Shizuoka University, Yada, Shizuoka 422-8526, Japan.
| | - Sohei Ito
- School of Food and Nutritional Sciences, Shizuoka University, Yada, Shizuoka 422-8526, Japan.
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Pervin M, Unno K, Ohishi T, Tanabe H, Miyoshi N, Nakamura Y. Beneficial Effects of Green Tea Catechins on Neurodegenerative Diseases. Molecules 2018; 23:molecules23061297. [PMID: 29843466 PMCID: PMC6099654 DOI: 10.3390/molecules23061297] [Citation(s) in RCA: 156] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 05/21/2018] [Accepted: 05/21/2018] [Indexed: 12/12/2022] Open
Abstract
Tea is one of the most consumed beverages in the world. Green tea, black tea, and oolong tea are made from the same plant Camellia sinensis (L.) O. Kuntze. Among them, green tea has been the most extensively studied for beneficial effects on diseases including cancer, obesity, diabetes, and inflammatory and neurodegenerative diseases. Several human observational and intervention studies have found beneficial effects of tea consumption on neurodegenerative impairment, such as cognitive dysfunction and memory loss. These studies supported the basis of tea's preventive effects of Parkinson's disease, but few studies have revealed such effects on Alzheimer's disease. In contrast, several human studies have not reported these favorable effects with regard to tea. This discrepancy may be due to incomplete adjustment of confounding factors, including the method of quantifying consumption, beverage temperature, cigarette smoking, alcohol consumption, and differences in genetic and environmental factors, such as race, sex, age, and lifestyle. Thus, more rigorous human studies are required to understand the neuroprotective effect of tea. A number of laboratory experiments demonstrated the benefits of green tea and green tea catechins (GTCs), such as epigallocatechin gallate (EGCG), and proposed action mechanisms. The targets of GTCs include the abnormal accumulation of fibrous proteins, such as Aβ and α-synuclein, inflammation, elevated expression of pro-apoptotic proteins, and oxidative stress, which are associated with neuronal cell dysfunction and death in the cerebral cortex. Computational molecular docking analysis revealed how EGCG can prevent the accumulation of fibrous proteins. These findings suggest that GTCs have the potential to be used in the prevention and treatment of neurodegenerative diseases and could be useful for the development of new drugs.
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Affiliation(s)
- Monira Pervin
- School of Food and Nutritional Sciences, University of Shizuoka, Suruga-ku, Shizuoka 422-8526, Japan.
| | - Keiko Unno
- School of Pharmaceutical Sciences, University of Shizuoka, Suruga-ku, Shizuoka 422-8526, Japan.
| | - Tomokazu Ohishi
- Institute of Microbial Chemistry (BIKAKEN), Numazu, Shizuoka 410-0301, Japan.
| | - Hiroki Tanabe
- Department of Nutritional Sciences, Faculty of Health and Welfare Science, Nayoro City University, Nayoro-city, Hokkaido 096-8641, Japan.
| | - Noriyuki Miyoshi
- School of Food and Nutritional Sciences, University of Shizuoka, Suruga-ku, Shizuoka 422-8526, Japan.
| | - Yoriyuki Nakamura
- School of Food and Nutritional Sciences, University of Shizuoka, Suruga-ku, Shizuoka 422-8526, Japan.
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15
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16
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Zhang H, Yi Z, Sun Z, Ma X, Li X. Functional nanoparticles of tea polyphenols for doxorubicin delivery in cancer treatment. J Mater Chem B 2017; 5:7622-7631. [DOI: 10.1039/c7tb01323j] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Simply-prepared nanoparticles of tea polyphenols are biocompatible, stimuli-responsive carriers for therapeutic agents, resulting in enhanced anticancer efficacy.
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Affiliation(s)
- Huaiying Zhang
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Zeng Yi
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Zhe Sun
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Xiaomin Ma
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Xudong Li
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- P. R. China
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17
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Cai Y, Zhang J, Chen NG, Shi Z, Qiu J, He C, Chen M. Recent Advances in Anticancer Activities and Drug Delivery Systems of Tannins. Med Res Rev 2016; 37:665-701. [PMID: 28004409 DOI: 10.1002/med.21422] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2015] [Revised: 08/28/2016] [Accepted: 09/22/2016] [Indexed: 12/11/2022]
Abstract
Tannins, polyphenols in medicinal plants, have been divided into two groups of hydrolysable and condensed tannins, including gallotannins, ellagitannins, and (-)-epigallocatechin-3-gallate (EGCG). Potent anticancer activities have been observed in tannins (especially EGCG) with multiple mechanisms, such as apoptosis, cell cycle arrest, and inhibition of invasion and metastases. Furthermore, the combinational effects of tannins and anticancer drugs have been demonstrated in this review, including chemoprotective, chemosensitive, and antagonizing effects accompanying with anticancer effect. However, the applications of tannins have been hindered due to their poor liposolubility, low bioavailability, off-taste, and shorter half-life time in human body, such as EGCG, gallic acid, and ellagic acid. To tackle these obstacles, novel drug delivery systems have been employed to deliver tannins with the aim of improving their applications, such as gelatin nanoparticles, micelles, nanogold, liposomes, and so on. In this review, the chemical characteristics, anticancer properties, and drug delivery systems of tannins were discussed with an attempt to provide a systemic reference to promote the development of tannins as anticancer agents.
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Affiliation(s)
- Yuee Cai
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Jinming Zhang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Nelson G Chen
- Institute of Biomedical Engineering, Department of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu, Taiwan
| | - Zhi Shi
- Department of Cell Biology & Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology, Jinan University, Guangzhou, Guangdong 510632, China
| | - Jiange Qiu
- Department of Cell Biology & Institute of Biomedicine, National Engineering Research Center of Genetic Medicine, Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology, Jinan University, Guangzhou, Guangdong 510632, China
| | - Chengwei He
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Meiwan Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
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18
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Griffiths K, Aggarwal BB, Singh RB, Buttar HS, Wilson D, De Meester F. Food Antioxidants and Their Anti-Inflammatory Properties: A Potential Role in Cardiovascular Diseases and Cancer Prevention. Diseases 2016; 4:E28. [PMID: 28933408 PMCID: PMC5456284 DOI: 10.3390/diseases4030028] [Citation(s) in RCA: 125] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Revised: 07/18/2016] [Accepted: 07/18/2016] [Indexed: 12/24/2022] Open
Abstract
Mediterranean-style diets caused a significant decline in cardiovascular diseases (CVDs) in early landmark studies. The effect of a traditional Mediterranean diet on lipoprotein oxidation showed that there was a significant reduction in oxidative stress in the intervention group (Mediterranean diet + Virgin Olive Oil) compared to the low-fat diet group. Conversely, the increase in oxidative stress causing inflammation is a unifying hypothesis for predisposing people to atherosclerosis, carcinogenesis, and osteoporosis. The impact of antioxidants and anti-inflammatory agents on cancer and cardiovascular disease, and the interventive mechanisms for the inhibition of proliferation, inflammation, invasion, metastasis, and activation of apoptosis were explored. Following the Great Oxygen Event some 2.3 billion years ago, organisms have needed antioxidants to survive. Natural products in food preservatives are preferable to synthetic compounds due to their lower volatility and stability and generally higher antioxidant potential. Free radicals, reactive oxygen species, antioxidants, pro-oxidants and inflammation are described with examples of free radical damage based on the hydroxyl, nitric oxide and superoxide radicals. Flavonoid antioxidants with 2- or 3-phenylchroman structures such as quercetin, kaempferol, myricetin, apigenin, and luteolin, constituents of fruits, vegetables, tea, and wine, which may reduce coronary disease and cancer, are described. The protective effect of flavonoids on the DNA damage caused by hydroxyl radicals through chelation is an important mechanism, though the converse may be possible, e.g., quercetin. The antioxidant properties of carotenoids, which are dietary natural pigments, have been studied in relation to breast cancer risk and an inverse association was found with plasma concentrations: higher levels mean lower risk. The manipulation of primary and secondary human metabolomes derived especially from existing or transformed gut microbiota was explored as a possible alternative to single-agent dietary interventions for cancer and cardiovascular disease. Sustained oxidative stress leading to inflammation and thence to possibly to cancer and cardiovascular disease is described for spices and herbs, using curcumin as an example of an intervention, based on activation of transcription factors which suggest that oxidative stress, chronic inflammation, and cancer are closely linked.
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Affiliation(s)
- Keith Griffiths
- Emeritus Professor of Cancer Research, University of Wales College of Medicine, Laurel Cottage, Castleton, Cardiff CF3 2UR, UK.
| | | | - Ram B Singh
- Halberg Hospital and Research Institute, Civil Lines, Moradabad, UP 244001, India.
| | - Harpal S Buttar
- Department of Pathology & Laboratory Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5 , Canada.
| | - Douglas Wilson
- School Medicine Pharmacy and Health, Durham University, Durham TS17 6BH, UK.
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Zhan W, Liu Y, Li D, Liu Y. Advancing insights on the anti-obesity biochemical mechanism of (−)-epigallocatechin gallate (EGCG) by inhibiting α-amylase activity. RSC Adv 2016. [DOI: 10.1039/c6ra20750b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The biochemical mechanisms of EGCG against human salivary α-amylase are comprehensively investigated in vitro as well as histological analyses and physiological indexes of obesity mice in vivo after 30 day EGCG oral administration.
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Affiliation(s)
- Wang Zhan
- Beijing Key Laboratory of Bioprocess
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Yang Liu
- Beijing Key Laboratory of Bioprocess
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Dongpu Li
- Graduate School of Tianjin Medical University
- Tianjin 300000
- China
| | - Yun Liu
- Beijing Key Laboratory of Bioprocess
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing 100029
- China
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20
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Gadkari PV, Balarman M, Kadimi US. Polyphenols from fresh frozen tea leaves (Camellia assamica L.,) by supercritical carbon dioxide extraction with ethanol entrainer - application of response surface methodology. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2015; 52:720-30. [PMID: 25694680 PMCID: PMC4325012 DOI: 10.1007/s13197-013-1085-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 06/24/2013] [Accepted: 06/28/2013] [Indexed: 12/14/2022]
Abstract
Fresh frozen tea leaves (Camellia assamica L.) were extracted with SC-CO2 to obtain polyphenols rich in EGCG and compared with conventional solvent extraction. Extraction parameters such as temperature, pressure and solvent to material ratio were critical factors in extraction and optimized by response surface methodology (RSM). The maximum yield of extractable solids using SC-CO2 with ethanol entrainer was carried out at pressures 150 to 350 bar, temperatures from 40 °C to 60 °C and solvent to material ratio 100 to 200. The theoretical yield was 3.91 % (w/w), while experimental yield was 4.20 ± 0.27 % (w/w) at temperature of 50 °C, pressure 250 bar and solvent to material ratio of 200. The chemical compositions of extracted solids were investigated by HPLC which showed 722.68-848.09 ± 1.12 mg of EGCG/g of extractable solids were separated in SC-CO2. Also, 54.62 ± 1.19 mg of EGCG/g of extractable solids was separated using conventional extraction which is quantitatively lesser than SC-CO2 extraction yield. Thus, SC-CO2 extraction was proved to be effective technique in obtaining extracts rich in EGCG (>95 %).
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Affiliation(s)
- Pravin Vasantrao Gadkari
- />Department of Food Engineering, CSIR (Council of Scientific and Industrial Research, India) - Central Food Technological Research Institute, Mysore, 570 020 India
- />Academy of Scientific and Innovative Research, New Delhi, India
| | - Manohar Balarman
- />Department of Food Engineering, CSIR (Council of Scientific and Industrial Research, India) - Central Food Technological Research Institute, Mysore, 570 020 India
- />Academy of Scientific and Innovative Research, New Delhi, India
| | - Udaya Sankar Kadimi
- />Department of Food Engineering, CSIR (Council of Scientific and Industrial Research, India) - Central Food Technological Research Institute, Mysore, 570 020 India
- />Academy of Scientific and Innovative Research, New Delhi, India
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Levitsky DO, Dembitsky VM. Anti-breast Cancer Agents Derived from Plants. NATURAL PRODUCTS AND BIOPROSPECTING 2014; 5:1-16. [PMID: 25466288 PMCID: PMC4327996 DOI: 10.1007/s13659-014-0048-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2014] [Accepted: 11/11/2014] [Indexed: 05/28/2023]
Abstract
Upon emergence of modern anticancer therapy, medical community is divided into two opposite camps, one of them claiming absolute necessity of using isolated or synthesized chemical compounds for efficient patient treatment and another one advocating alternative cancer therapies, in particular those based on natural sources, including extracts from plants. It seems, in reality, that the two camps are reconcilable: while natural sources, plant extracts or juices play both curative and protective role, drugs represent the ultimate possibility to inhibit or reverse tumor development. In this paper we tried to analyze anti-breast cancer potencies of quite a few extracts from different plant sources and to compare their anti-proliferative efficiency of crude extracts with actions of their purified ingredients.
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Affiliation(s)
- Dmitri O. Levitsky
- Unité Fonctionalité et Ingénierie des Protéines (UFIP), Faculté des Sciences et des Techniques, Université de Nantes/CNRS, 44322 Nantes Cedex 03, France
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Gadkari PV, Kadimi US, Balaraman M. Catechin concentrates of garden tea leaves (Camellia sinensis L.): extraction/isolation and evaluation of chemical composition. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2014; 94:2921-2928. [PMID: 24585505 DOI: 10.1002/jsfa.6633] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 01/15/2014] [Accepted: 02/18/2014] [Indexed: 06/03/2023]
Abstract
BACKGROUND Solid-liquid (SLE) and liquid-liquid (LLE) extraction techniques were applied to extract catechins and caffeine from quick mechanically expelled tea leaf juice (QMETLJ) and freeze-dried (FD)-QMETLJ of Camellia sinensis L. The concentrates obtained were analyzed for total polyphenol content and antioxidant activity (DPPH(•) inhibition, FRAP and phosphomolybdenum assay). Catechins were identified and quantified using HPLC. RESULTS Overall, 95% (v/v) ethanol was the best solvent system for extracting total polyphenols (355.26 ± 23.68 to 457.89 ± 28.94 g GAE kg(-1) extractable solid yield (ESY)) and antioxidants (DPPH(•) inhibition, 16.97 ± 0.52 to 20.83 ± 3.11%; FRAP, 4.15 ± 0.32 to 6.38 ± 0.57 mmol TE g(-1) ESY; Mo(V) reduction, 2.47 ± 0.19 to 3.84 ± 0.39 mmol AAE g(-1) ESY) from FD-QMETLJ. Similarly, in LLE, ethyl acetate showed the best results for recovering polyphenols (960.52 ± 7.89 g GAE kg(-1) ESY) and antioxidants (DPPH(•) inhibition, 42.39 ± 0.91%; FRAP, 11.39 ± 0.83 mmol TE g(-1) ESY; Mo(V) reduction, 6.71 ± 1.14 mmol AAE g(-1) ESY) from QMETLJ. CONCLUSION It was found that 95% ethanol can be used to increase the total polyphenols and antioxidants in extracts from FD-QMETLJ, while ethyl acetate can be effectively employed for concentrating catechins from QMETLJ.
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Affiliation(s)
- Pravin Vasantrao Gadkari
- Department of Food Engineering, CSIR (Council of Scientific and Industrial Research, India), Central Food Technological Research Institute, Mysore, 570 020, India; Academy of Scientific and Innovative Research, New Delhi, 110 001, India
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Hu ZH, Lin YW, Xu X, Chen H, Mao YQ, Wu J, Xu XL, Zhu Y, Li SQ, Zheng XY, Xie LP. No association between tea consumption and risk of renal cell carcinoma: a meta-analysis of epidemiological studies. Asian Pac J Cancer Prev 2014; 14:1691-5. [PMID: 23679258 DOI: 10.7314/apjcp.2013.14.3.1691] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE To evaluate the association between tea consumption and the risk of renal cell carcinoma. METHODS We searched PubMed,Web of Science and Scopus between 1970 and November 2012. Two evaluators independently reviewed and selected articles based on predetermined selection criteria. RESULTS Twelve epidemiological studies (ten case-control studies and two cohort studies) were included in the final analysis. In a meta-analysis of all included studies, when compared with the lowest level of tea consumption, the overall relative risk (RR) of renal cell carcinoma for the highest level of tea consumption was 1.03 (95% confidence interval [CI] 0.89-1.21). In subgroup meta-analyses by study design, there was no significant association between tea consumption and renal cell carcinoma risk in ten case-control studies using adjusted data (RR=1.08, 95% CI 0.84-1.40). Furthermore, there was no significant association in two cohort studies using adjusted data (RR=0.95, 95% CI 0.81-1.12). CONCLUSION Our findings do not support the conclusion that tea consumption is related to decreased risk of renal cell carcinoma. Further prospective cohort studies are required.
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Affiliation(s)
- Zheng-Hui Hu
- Department of Urology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China.
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Li X, Feng Y, Liu J, Feng X, Zhou K, Tang X. Epigallocatechin-3-gallate inhibits IGF-I-stimulated lung cancer angiogenesis through downregulation of HIF-1α and VEGF expression. JOURNAL OF NUTRIGENETICS AND NUTRIGENOMICS 2013; 6:169-78. [PMID: 24008975 DOI: 10.1159/000354402] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Accepted: 07/11/2013] [Indexed: 12/29/2022]
Abstract
BACKGROUND/AIMS Numerous studies have shown that epigallocatechin-3-gallate (EGCG), a polyphenol component extracted from green tea, can inhibit the growth and induce apoptosis of various types of human tumor cells. In this study, we evaluated the inhibitory effects of EGCG on the proangiogenic capabilities of A549 cells. METHODS A549 cells starved in serum-free culture medium for 24 h were pretreated with EGCG at various concentrations (0, 10, 25, 50, and 100 μmol/l) for 1 h, followed by the addition of insulin-like growth factor-I (IGF-I) at the final concentration of 40 ng/ml and continued culturing for an additional 16 h. The in vitro angiogenesis analyzing test kit with ECMatrix™ gel was used to detect the formation of capillary tube-like structures. The mRNA expression of hypoxia-inducible factor-1α (HIF-1α) and vascular endothelial growth factor (VEGF) was determined by real-time PCR. The protein expression of HIF-1α and VEGF was detected by Western blotting and ELISA, respectively. RESULTS EGCG significantly inhibited the formation of capillary tube-like structures on the surface of ECMatrix induced by IGF-I both in vitro and in vivo and reduced the level of hemoglobin in Matrigel plugs. In addition, EGCG was shown to significantly inhibit the IGF-I-induced upregulation of HIF-1α protein expression. Meanwhile, EGCG at the concentration of 25 and 100 μmol/l exhibited obvious inhibitory effects on IGF-I-induced VEGF expression (p < 0.01). CONCLUSION Our results suggest that EGCG has potent inhibitory effects on tumor angiogenesis induced by IGF-I in human non-small cell lung cancer cells, which may possibly contribute to the downregulation of HIF-1α and VEGF expression.
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Affiliation(s)
- Xiangyong Li
- Institute of Biochemistry and Molecular Biology, Guangdong Medical College, Zhanjiang, China
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Braicu C, Ladomery MR, Chedea VS, Irimie A, Berindan-Neagoe I. The relationship between the structure and biological actions of green tea catechins. Food Chem 2013; 141:3282-9. [PMID: 23871088 DOI: 10.1016/j.foodchem.2013.05.122] [Citation(s) in RCA: 122] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Revised: 10/07/2012] [Accepted: 05/24/2013] [Indexed: 12/12/2022]
Abstract
Catechins and their gallate esters are a class of polyphenolic compounds. The catechin subclass known as flavan-3-ols have recently attracted much attention with regards to their beneficial effect on human health. Their biological actions are dependent on the structure of the compounds and vary according to cell type. They are best known as powerful antioxidants; however depending on the doses they also exhibit prooxidant effects. The anti- or prooxidant effects of green tea catechins have been implicated in the modulation of several cellular functions often associated with strong chemoprotective properties. This review summarises the benefit catechins to human health, the main molecular pathways modulated by catechins. The relationship between the structure and activity of the catechins needs to be studied further. In the future, the structure of catechins could be modified so as to synthesise novel compounds with more specific beneficial properties and higher bioavailability.
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Affiliation(s)
- Cornelia Braicu
- Department of Functional Genomics and Experimental Pathology, The Oncological Institute Prof. Dr. Ion Chiricuta, Cluj-Napoca, Romania.
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Darvesh AS, Bishayee A. Chemopreventive and Therapeutic Potential of Tea Polyphenols in Hepatocellular Cancer. Nutr Cancer 2013; 65:329-44. [DOI: 10.1080/01635581.2013.767367] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Al-Malki AL, Moselhy SS. Protective effect of vitamin E and epicatechin against nicotine-induced oxidative stress in rats. Toxicol Ind Health 2012; 29:202-8. [PMID: 22287617 DOI: 10.1177/0748233711430976] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Nicotine is a major pharmacologically active and addictive component of tobacco smoke, which is regarded to be a primary risk factor in the development of cardiovascular and pulmonary diseases. Epicatechin is one of the most potent antioxidants present in the human diet. Particularly high levels of this compound are found in tea, apples and chocolate. It has been reported that tea extracts and/or its constituents have antibacterial, antiviral, antioxidative, antitumor and antimutagenic activities. Vitamin E is a major lipid-soluble antioxidant vitamin and free radical scavenger, presents as an integral component of cellular membranes and has important biological functions. The primary mechanism by which vitamin E is proposed to prevent cancer is through their antioxidant properties. The goal of this study is to evaluate the effect of epicatechin alone or combined with vitamin E in inhibiting the oxidative stress induced by nicotine in rats. Results obtained indicated that there was a significant elevation in the levels of malondialdhyde (MDA) in nicotine injected rats. The combined treatment (epicatechin + Vit E) group showed a potential reduction of these parameters more than individual treatment. The activities of superoxide dismutase, catalase and glutathione peroxidase were found significantly higher in combined treated than untreated rats. In nicotine group, a negative significant correlation between reduced glutathione and MDA (r = -0.92) was observed. In conclusion, these results suggested that the supplementation of diet with epicatechin and vitamin E provided antioxidant defense with strong chemopreventive activity against nicotine-induced carcinogenesis.
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Affiliation(s)
- Abdulrahman L Al-Malki
- Biochemistry Department, Faculty of Science, King AbdulAziz University, Jeddah, Saudi Arabia
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Hurt RT, Wilson T. Geriatric obesity: evaluating the evidence for the use of flavonoids to promote weight loss. J Nutr Gerontol Geriatr 2012; 31:269-289. [PMID: 22888842 DOI: 10.1080/21551197.2012.698222] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Obesity is a rapidly growing epidemic that now affects approximately 30% of the adult population in the United States. The prevalence of obesity in the geriatric population makes it one of the fastest growing groups due to aging baby boomers. Because of the limited number of available treatments for obese adults, they often turn to supplements and alternative medicine sources to help them lose weight. One such group of supplements contains plant metabolites flavonoids, which includes catechins from tea, quercetin from fruits and vegetables, and isoflavones from soy products. Some flavonoids such as catechins and soy isoflavones can modestly reduce weight. This review examined the clinical evidence for catechins, quercetin, and soy isoflavones for the treatment of obesity and explored the mechanisms of action as related to obesity. Furthermore, flavonoids were evaluated for the treatment of obesity in geriatric populations as well as for safety concerns.
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Affiliation(s)
- Ryan T Hurt
- Complimentary and Integrative Medicine Program and Division of General Internal Medicine, Mayo Clinic, Rochester, Minnesota 55905, USA.
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Ding J, Kong X, Yao J, Wang J, Cheng X, Tang B, He Z. Core–shell mesoporous silica nanoparticles improve HeLa cell growth and proliferation inhibition by (−)-epigallocatechin-3-gallate by prolonging the half-life. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm32271d] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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30
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Bansal S, Syan N, Mathur P, Choudhary S. Pharmacological profile of green tea and its polyphenols: a review. Med Chem Res 2011. [DOI: 10.1007/s00044-011-9800-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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31
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Yang J, Han Y, Sun H, Chen C, He D, Guo J, Yu C, Jiang B, Zhou L, Zeng C. (-)-Epigallocatechin gallate suppresses proliferation of vascular smooth muscle cells induced by high glucose by inhibition of PKC and ERK1/2 signalings. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:11483-11490. [PMID: 21973165 DOI: 10.1021/jf2024819] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Proliferation of vascular smooth muscle cells (VSMCs) plays an important role in the development and progression of diabetes-related vascular complications. (-)-Epigallocatechin gallate (EGCG), the major catechin derived from green tea, is able to exert antidiabetes effects in animal models. However, it is not known whether or not EGCG inhibits VSMC proliferation induced by high glucose. This study tested the hypothesis that EGCG might have an inhibitory effect on VSMC proliferation induced by high glucose. VSMC proliferation was determined by [(3)H]-thymidine incorporation and uptake of 3-(4,5-dimethylthiazol-2-yl)-diphenyltetrazolium bromide (MTT). Extracellular signal-regulated kinase (ERK) 1/2 phosphorylation was determined by immunoblotting, and ERK 1/2 activity was detected by measuring the ability to phosphorylate its substrate Elk-1. Glucose increased VSMC proliferation in a concentration-dependent manner, which was reduced in the presence of EGCG. VSMC proliferation mediated by high glucose (30 mM) was involved in protein kinase C (PKC) and ERK1/2 signalings, because its effect was blocked by PKC inhibitor (PKC inhibitor 19-31) and ERK1/2 inhibitor (PD98059). Pretreatment of VSMCs with EGCG significantly inhibited the stimulatory effect of high glucose on PKC and ERK1/2 activation, followed by attenuation of its downstream transcription factor Elk-1 phosphorylation. Taken together, these results suggest that EGCG could suppress VSMC proliferation induced by high glucose by inhibition of PKC and ERK1/2 signalings in VSMCs, which indicates that EGCG might be a possible medicine to reduce vascular complications in diabetes.
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Affiliation(s)
- Jian Yang
- Department of Nutrition, Daping Hospital, The Third Military Medical University, Chongqing, 400042 People's Republic of China
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EGCG downregulates IL-1RI expression and suppresses IL-1-induced tumorigenic factors in human pancreatic adenocarcinoma cells. Biochem Pharmacol 2011; 82:1153-62. [PMID: 21787753 DOI: 10.1016/j.bcp.2011.07.063] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2011] [Revised: 07/07/2011] [Accepted: 07/08/2011] [Indexed: 11/20/2022]
Abstract
Human pancreatic cancer is currently one of the fifth-leading causes of cancer-related mortality with a 5-year survival rate of less than 5%. Since pancreatic carcinoma is largely refractory to conventional therapies, there is a strong medical need for the development of novel and innovative therapeutic strategies. Increasing evidence suggests an association of carcinogenesis and chronic inflammation. Because IL-1 plays a crucial role in inflammation-associated carcinogenesis, we analyzed the biological effects of IL-1 and its modulation by the chemopreventive green tea polyphenol (-)-epigallocatechin-3-gallate (EGCG) in the human pancreatic adenocarcinoma cell line Colo357. Proinflammatory IL-6 and PGHS-2 as well as proangiogenic IL-8 and VEGF were induced by IL-1, whereas the secretion of invasion-promoting MMP-2 remained unaffected. IL-1 responsiveness and constitutive MMP-2 release in Colo357 were downregulated by EGCG in a dose- and time-dependent manner. Moreover, EGCG reduced cell viability via induction of apoptosis in Colo357. Since EGCG effects on cytokine production precede reduction in cell viability, we hypothesize that these findings are not only a result of cell death but also depend on alterations in the IL-1 signaling cascade. In this context, we found for the first time an EGCG-induced downregulation of the IL-1RI expression possibly being caused by NF-κB inhibition and causative for its inhibitory action on the production of tumorigenic factors. Thus, our data might have future clinical implications with respect to the development of novel approaches as an adjuvant therapy in high-risk patients with human pancreatic carcinoma.
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Abstract
Tea, one of the most commonly consumed beverages in the world, has many health benefits. Tea polyphenols support health by promoting antioxidant enzymes, promoting apoptosis, preventing angiogenesis, and modulating epigenetic change. Considerable basic science and epidemiologic evidence supports the regular consumption of this tasty, inexpensive beverage.
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Affiliation(s)
- Carolyn M Matthews
- Division of Gynecologic Oncology, Department of Gynecology and Department of Oncology, Baylor University Medical Center and Baylor Charles A. Sammons Cancer Center, Dallas, Texas. Dr. Matthews is currently president of the medical staff at Baylor University Medical Center
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Jasmine tea consumption and upper gastrointestinal cancer in China. Cancer Causes Control 2011; 20:1997-2007. [PMID: 19597950 DOI: 10.1007/s10552-009-9394-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2008] [Accepted: 06/22/2009] [Indexed: 10/20/2022]
Abstract
INTRODUCTION Epidemiological data on green/jasmine tea and esophageal as well as gastric cancer are limited and inconclusive. METHODS In order to study the effect of jasmine tea in upper gastrointestinal (UGI) cancers, we evaluated 600 esophageal squamous cell carcinoma (ESCC), 598 gastric cardia cancer (GCA), and 316 gastric non-cardia cancer (GNCA) cases and 1,514 age-, gender-, and neighborhood-matched controls. Odds ratios (ORs) and 95% confidence intervals (CIs) were estimated from logistic regression adjusted for matching factors and potential confounders. RESULTS Among controls, 35% of males and 8% of females reported consumption of jasmine tea; other tea consumption was rare. Consumption of jasmine tea (ever vs. never) was not associated with risk of ESCC (OR = 1.15, 95% CI 0.92–1.44), GCA (OR = 1.14, 95% CI 0.88–1.37), or GNCA (OR = 0.85, 95% CI 0.64–1.15) in males and females combined. Among males, cumulative lifetime consumption showed a significant positive dose–response relation with ESCC risk, but not for GCA and GNCA. In exploratory analyses, occupation affected the relation between tea and ESCC such that consumption in males was associated with increased risk only in non-office workers. CONCLUSION Overall, we found no evidence for a protective effect of tea in esophageal or gastric cancer. Further studies of the potential effects of thermal damage, tea quality, and water quality on UGI cancers are suggested.
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Alshatwi AA. Catechin hydrate suppresses MCF-7 proliferation through TP53/Caspase-mediated apoptosis. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2010; 29:167. [PMID: 21167021 PMCID: PMC3019143 DOI: 10.1186/1756-9966-29-167] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2010] [Accepted: 12/17/2010] [Indexed: 02/08/2023]
Abstract
Catechin hydrate (CH), a strong antioxidant that scavenges radicals, is a phenolic compound that is extracted from plants and is present in natural food and drinks, such as green tea and red wine. CH possesses anticancer potential. The mechanism of action of many anticancer drugs is based on their ability to induce apoptosis. In this study, I sought to characterize the downstream apoptotic genes targeted by CH in MCF-7 human breast cancer cells. CH effectively kills MCF-7 cells through induction of apoptosis. Apoptosis was confirmed by terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) and real-time PCR assays. Cells were exposed to 150 μg/ml CH and 300 μg/mL CH for 24 hours, which resulted in 40.7% and 41.16% apoptotic cells, respectively. Moreover, a 48-hour exposure to 150 μg/ml CH and 300 μg/ml CH resulted in 43.73% and 52.95% apoptotic cells, respectively. Interestingly, after 72 hours of exposure to both concentrations of CH, almost 100% of cells lost their integrity. These results were further confirmed by the increased expression of caspase-3,-8, and -9 and TP53 in a time-dependent and dose-dependent manner, as determined by real-time quantitative PCR. In summary, the induction of apoptosis by CH is affected by its ability to increase the expression of pro-apoptotic genes such as caspase-3, -8, and -9 and TP53.
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Affiliation(s)
- Ali A Alshatwi
- Molecular Cancer Biology Research Lab, Dept, of Food Science and Nutrition, College of Agriculture and Food Sciences, King Saud University, Saudi Arabia.
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Al-Malki AL, Moselhy SS. The protective effect of epicatchin against oxidative stress and nephrotoxicity in rats induced by cyclosporine. Hum Exp Toxicol 2010; 30:145-51. [DOI: 10.1177/0960327110369820] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Cyclosporine A (CyA) is the first-line immunosuppressant used for the management of solid organ transplantation and autoimmune diseases. Reactive oxygen species (ROS) can attack all types of macromolecules including DNA and damage it. Epicatechin (EC) is one of the most potent antioxidants present in the human diet. Particularly high levels of this compound are found in tea, apples, and chocolate. The goal of this study was to evaluate the protective effect of EC against CyA toxicity and its antioxidant activity in transplanted patients to avoid its side effects. Results obtained showed that, CyA exert its toxic effect by increasing the free radicals and ROS that causes lipid peroxidation and cell damage, this is detected by elevation of hydroperoxides and thiobarbituric acid reactive substances, while the activities of antioxidant enzymes include (superoxide dismutase [SOD], catalase [CAT] and glutathione peroxidase [GPx]) were significantly decreased as compared with control rats. The deleterious toxic effects of CyA are, at least in part, due to increased production of free radicals and ROS. Treatment of rats with epicatchin ameliorates the toxicity of CyA by decreasing the lipid peroxidation and enhanced the antioxidants enzyme activities.
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Affiliation(s)
| | - Said S Moselhy
- Biochemistry Department, Faculty of Science, King Abdualziz University, Jeddah, KSA,
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Phytochemicals in cancer prevention and therapy: truth or dare? Toxins (Basel) 2010; 2:517-51. [PMID: 22069598 PMCID: PMC3153217 DOI: 10.3390/toxins2040517] [Citation(s) in RCA: 122] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2010] [Revised: 03/10/2010] [Accepted: 03/10/2010] [Indexed: 12/25/2022] Open
Abstract
A voluminous literature suggests that an increase in consumption of fruit and vegetables is a relatively easy and practical strategy to reduce significantly the incidence of cancer. The beneficial effect is mostly associated with the presence of phytochemicals in the diet. This review focuses on a group of them, namely isothiocyanate, curcumin, genistein, epigallocatechin gallate, lycopene and resveratrol, largely studied as chemopreventive agents and with potential clinical applications. Cellular and animal studies suggest that these molecules induce apoptosis and arrest cell growth by pleiotropic mechanisms. The anticancer efficacy of these compounds may result from their use in monotherapy or in association with chemotherapeutic drugs. This latter approach may represent a new pharmacological strategy against several types of cancers. However, despite the promising results from experimental studies, only a limited number of clinical trials are ongoing to assess the therapeutic efficacy of these molecules. Nevertheless, the preliminary results are promising and raise solid foundations for future investigations.
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Chinese tea consumption is associated with longer telomere length in elderly Chinese men. Br J Nutr 2009; 103:107-13. [DOI: 10.1017/s0007114509991383] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Environmental and lifestyle factors that affect oxidative stress and inflammation may influence telomere length (TL). There are limited data to relate the effect of dietary components on TL. The present study examined the association between food groups and TL in a sample of elderly Chinese. In a sample of 2006 Chinese (976 men and 1030 women) aged 65 years and over, TL was measured by quantitative real-time PCR and daily intake of food groups was assessed by a validated FFQ. Linear regression and analysis of covariance were used to examine the association between food group intake and TL, with adjustment for demographic and lifestyle factors. In men, only Chinese tea consumption was significantly associated with TL after adjustment for demographics and lifestyle factors (P = 0·002). Mean difference in TL for those in the highest quartile of Chinese tea consumption (>3 cups/d or >750 ml/d) as compared with those in the lowest quartile of Chinese tea consumption ( ≤ 0·28 cups/d or ≤ 70 ml/d) was 0·46 kb, corresponding to approximately a difference of 5 years of life. In women, intake of fats and oils was borderline and negatively associated with TL after adjustment for demographic and lifestyle factors (P = 0·037). In conclusion, Chinese tea consumption was positively associated with TL in elderly Chinese men.
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Syed DN, Suh Y, Afaq F, Mukhtar H. Dietary agents for chemoprevention of prostate cancer. Cancer Lett 2008; 265:167-76. [PMID: 18395333 PMCID: PMC3220618 DOI: 10.1016/j.canlet.2008.02.050] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2008] [Revised: 01/16/2008] [Accepted: 02/21/2008] [Indexed: 12/19/2022]
Abstract
Prostate cancer (CaP) is the leading cause of cancer-related deaths in American men, responsible for over 29,000 deaths in the year 2007. Chemoprevention is a plausible and cost-effective approach to reduce cancer morbidity and mortality through inhibition of precancerous events before the occurrence of clinical disease. Indeed, CaP is an ideal candidate disease for chemopreventive intervention as it is typically diagnosed in the elderly population with a relatively slower rate of growth and progression. The potential of dietary substances to act as chemopreventive agents against CaP is increasingly appreciated. Further, epidemiological studies have identified significant correlations between CaP incidence and dietary habits. It is hoped that, combining the knowledge based on agents with targets, we will be able to build an armamentarium of naturally occurring chemopreventive substances that could prevent or slow down the development and progression of CaP. In this review, we have summarized the findings from clinical and preclinical studies on dietary agents including green tea, pomegranate, lupeol, fisetin, and delphinidin that are currently being investigated in our laboratory for their chemopreventive potential against CaP.
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Affiliation(s)
- Deeba N Syed
- Department of Dermatology, University of Wisconsin, Medical Sciences Center, Madison, WI 53706, USA
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