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Refaey MS, Shah MA, Fayed MA, Rasul A, Siddiqui MF, Qasim M, Althobaiti NA, Saleem U, Malik A, Blundell R, Eldahshan OA. Neuroprotective effects of steroids. PHYTONUTRIENTS AND NEUROLOGICAL DISORDERS 2023:283-304. [DOI: 10.1016/b978-0-12-824467-8.00005-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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2
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Okoh MP, Singla RK, Madu C, Soremekun O, Adejoh J, Alli LA, Shen B. Phytomedicine in Disease Management: In-Silico Analysis of the Binding Affinity of Artesunate and Azadirachtin for Malaria Treatment. Front Pharmacol 2021; 12:751032. [PMID: 34916935 PMCID: PMC8669099 DOI: 10.3389/fphar.2021.751032] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Accepted: 10/07/2021] [Indexed: 02/05/2023] Open
Abstract
In the rural communities of sub-Saharan African (sSA) countries, malaria is being managed using phytocompounds. Artesunate is reported to inhibit Gephyrin E, a central, multi-domain scaffolding protein of inhibitory post-synapses. Neem plant and its metabolites like azadirachtin are being indicated for management of malaria by traditional healers. The present study was aimed to cheminformatically analyse the binding potential of artesunate and azadirachtin with various reactive moieties of Gephyrin E, to reduce malaria scourge. With molecular dynamics (MD), binding free energy estimation and binding affinity of artesunate and azadirachtin to Gephyrin E was done. GRIP docking was done to study the interactions of these test ligands with Gephyrin E (6FGC). MD simulation gave insights to structural changes upon binding of artesunate and azadirachtin in the ligand-binding pocket of Gephyrin E. Root mean square deviation (RMSD) and root mean square fluctuation (RMSF) were calculated. From the estimation, azadirachtin had a total binding energy of -36.97 kcal/mol; artesunate had a binding energy of -35.73 kcal/mol. The GRIP docking results provided a clearer evidence that artesunate has comparatively better binding affinity to Gephyrin E than azadirachtin, and the critical binding sites (in activity order) were cavity 3, 2, 8, and 6 for artesunate while for azadirachtin, it was cavity 6, 3, 8, and 2. The GRIP docking provided detailed interactions at the atomic levels, providing evidence; both compounds have chances to overcome the drug resistance problem, albeit higher for artesunate. Our findings added another piece of evidence that azadirachtin may be effective as an anti-malarial agent. The results herein may provide impetus for more studies into bioactive components of plant origin towards the effective management of malaria disease phenotype.
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Affiliation(s)
- Michael P Okoh
- Institutes for Systems Genetics, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu, China.,Department of Medical Biochemistry, Faculty of Basic Medical Sciences, College of Health Sciences, University of Abuja, Abuja, Nigeria
| | - Rajeev K Singla
- Institutes for Systems Genetics, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu, China
| | - Chijioke Madu
- Department of Medical Biochemistry, Faculty of Basic Medical Sciences, College of Health Sciences, University of Abuja, Abuja, Nigeria
| | - Opeyemi Soremekun
- The African Computational Genomics Group, MRC/UVRI at London School of Health and Tropical Medicine, Entebbe-Uganda, United Kingom.,Molecular Bio-computation and Drug Design Laboratory, School of Health Sciences, University of KwaZulu-Natal, Westville Campus, Durban, South Africa
| | - Johnson Adejoh
- Department of Medical Biochemistry, Faculty of Basic Medical Sciences, College of Health Sciences, University of Abuja, Abuja, Nigeria
| | - Lukman A Alli
- Department of Medical Biochemistry, Faculty of Basic Medical Sciences, College of Health Sciences, University of Abuja, Abuja, Nigeria
| | - Bairong Shen
- Institutes for Systems Genetics, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu, China
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Huang C, Zhou S, Tong Y, Lin Z, Gong S, Fan F. Simultaneous nitrogen-blow distillation extraction: A novel approach for aroma extraction of white tea. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2020.110675] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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4
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Alegiry MH, Hajrah NH, Alzahrani NAY, Shawki HH, Khan M, Zrelli H, Atef A, Kim Y, Alsafari IA, Arfaoui L, Alharby HF, Hajar AS, El-Seedi H, Juneja LR, Sabir JSM, El Omri A. Attitudes Toward Psychological Disorders and Alternative Medicine in Saudi Participants. Front Psychiatry 2021; 12:577103. [PMID: 33643086 PMCID: PMC7907434 DOI: 10.3389/fpsyt.2021.577103] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 01/04/2021] [Indexed: 01/14/2023] Open
Abstract
Background: This study was designed to investigate Saudis' attitudes toward mental distress and psychotropic medication, attribution of causes, expected side effects, and to analyze participants' expectations toward alternative or complementary medicine using aromatic and medicinal plants, through a survey. Method: The study included 674 participants (citizens and residents in Saudi Arabia) who were randomly contacted via email and social media and gave their consent to complete a questionnaire dealing with 39 items that can be clustered in six parts. Descriptive statistics and Chi-square for cross-tabulation were generated using SPSS. Results: Among the 664 participants, 73.4% believed that there are some positive and negative outcomes of psychotropic medication. Participants (72.0%) think that the most important reason leading to psychological disorders is mainly due to the loss of a relative or beloved person, and 73.9% considered psychic session as one of the possible treatments of psychological disorders. Surprisingly, only 18.8% of the participants agreed that medicinal and aromatic plants could be a possible treatment of the psychological disorder. Participants (82%) consider that physicians are the most trustful and preferred source of information about alternative and complementary medicine.
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Affiliation(s)
- Mohamed H. Alegiry
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University (KAU), Jeddah, Saudi Arabia
| | - Nahid H. Hajrah
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University (KAU), Jeddah, Saudi Arabia
| | - Nada A. Y Alzahrani
- Center of Excellence in Bionanoscience Research, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Hossam H. Shawki
- Department of Comparative and Experimental Medicine, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
- National Gene Bank of Egypt (NGB), Agricultural Research Center (ARC), Giza, Egypt
| | - Muhammadh Khan
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University (KAU), Jeddah, Saudi Arabia
- Center of Excellence in Bionanoscience Research, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Houda Zrelli
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University (KAU), Jeddah, Saudi Arabia
- Center of Excellence in Bionanoscience Research, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Ahmed Atef
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University (KAU), Jeddah, Saudi Arabia
| | - Youngil Kim
- Food Business Promotion Division, ROHTO Pharmaceutical Co., Ltd., Osaka, Japan
| | - Ibrahim A. Alsafari
- Department of Biology and Department of Chemistry, College of Science, University of Hafr Al Batin, Hafr Al Batin, Saudi Arabia
| | - Leila Arfaoui
- Clinical Nutrition Department, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Hesham F. Alharby
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University (KAU), Jeddah, Saudi Arabia
| | - Abdulrahman S. Hajar
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University (KAU), Jeddah, Saudi Arabia
| | - Hesham El-Seedi
- Pharmacognosy Group, Department of Medicinal Chemistry, Biomedical Centre, Uppsala University, Uppsala, Sweden
| | - Lekh Raj Juneja
- Food Business Promotion Division, ROHTO Pharmaceutical Co., Ltd., Osaka, Japan
| | - Jamal S. M. Sabir
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University (KAU), Jeddah, Saudi Arabia
- Center of Excellence in Bionanoscience Research, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Abdelfatteh El Omri
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University (KAU), Jeddah, Saudi Arabia
- Center of Excellence in Bionanoscience Research, King Abdulaziz University, Jeddah, Saudi Arabia
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5
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Becker LC, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD, Liebler DC, Marks JG, Shank RC, Slaga TJ, Snyder PW, Gill LJ, Heldreth B. Safety Assessment of Camellia sinensis-Derived Ingredients As Used in Cosmetics. Int J Toxicol 2019; 38:48S-70S. [PMID: 31840549 DOI: 10.1177/1091581819889914] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Cosmetic ingredients derived from Camellia sinensis (tea) plant parts function as antioxidants and skin conditioning agents-humectant and miscellaneous. The Cosmetic Ingredient Review (CIR) Expert Panel (Panel) reviewed relevant animal and human data related to these ingredients. The use of the leaf ingredients in beverages results in much larger systemic exposures than those possible from cosmetic use. Accordingly, concern over the systemic toxicity potential of leaf-derived ingredients is mitigated. Because product formulations may contain multiple botanical ingredients, each containing the same constituents of concern, formulators are advised to be aware of these constituents and to avoid reaching levels that may lead to sensitization or other toxic effects. The Panel concluded that the C sinensis leaf-derived ingredients are safe in the present practices of use and concentration described in this safety assessment when formulated to be nonsensitizing. However, the available data are insufficient to determine whether the non-leaf-derived ingredients are safe for use in cosmetics.
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Affiliation(s)
- Lillian C Becker
- Cosmetic Ingredient Review Former Scientific Analyst/Writer, Cosmetic Ingredient Review, Washington, DC, USA
| | - Wilma F Bergfeld
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Donald V Belsito
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Ronald A Hill
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Curtis D Klaassen
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Daniel C Liebler
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - James G Marks
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Ronald C Shank
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Thomas J Slaga
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Paul W Snyder
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Lillian J Gill
- Cosmetic Ingredient Review Former Director, Cosmetic Ingredient Review, Washington, DC, USA
| | - Bart Heldreth
- Cosmetic Ingredient Review Executive Director, Cosmetic Ingredient Review, Washington, DC, USA
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6
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Sanlier N, Atik İ, Atik A. A minireview of effects of white tea consumption on diseases. Trends Food Sci Technol 2018. [DOI: 10.1016/j.tifs.2018.10.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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7
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Yue W, Sun W, Rao RSP, Ye N, Yang Z, Chen M. Non-targeted metabolomics reveals distinct chemical compositions among different grades of Bai Mudan white tea. Food Chem 2018; 277:289-297. [PMID: 30502147 DOI: 10.1016/j.foodchem.2018.10.113] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Revised: 10/10/2018] [Accepted: 10/23/2018] [Indexed: 12/12/2022]
Abstract
So far, the chemical quality of different grades of white tea has largely remained unexplored. The objective of this study was to establish a model for quality evaluation of different grades of Bai Mudan white tea. We applied non-targeted ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry in combination with multivariate analysis and analyzed four different grades of Bai Mudan white tea. We found that the metabolite composition from the super-grade and the first-grade shared higher similarity compared to the second-grade or the third-grade white tea, and the Partial Least Square-Discriminant Analysis model showed high capability to explain the sample variation (R2Y = 0.998, Q2 = 0.95 in negative ionization modes). In total, 93 metabolites were structurally identified, wherein 21 low abundant metabolites showed distinct changes in abundance that were closely correlated with tea grade variation. These findings suggested their potential as markers to discriminate different grades of Bai Mudan white tea.
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Affiliation(s)
- Wenjie Yue
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; Jinshan College, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; FAFU-UCR Joint Center/Horticultural Plant Biology and Metabolomics Center, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Weijiang Sun
- Anxi College of Tea Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.
| | - R Shyama Prasad Rao
- Biostatistics and Bioinformatics Division, Yenepoya Research Center, Yenepoya University, Mangalore 575018, India
| | - Naixing Ye
- Key Laboratory of Tea Science in Universities of Fujian Province, College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Zhenbiao Yang
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; FAFU-UCR Joint Center/Horticultural Plant Biology and Metabolomics Center, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Mingjie Chen
- FAFU-UCR Joint Center/Horticultural Plant Biology and Metabolomics Center, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.
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8
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Fang ZT, Song CJ, Xu HR, Ye JH. Dynamic changes in flavonol glycosides during production of green, yellow, white, oolong and black teas from Camellia sinensis
L. (cv. Fudingdabaicha). Int J Food Sci Technol 2018. [DOI: 10.1111/ijfs.13961] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Zhou-Tao Fang
- Zhejiang University Tea Research Institute; 388 Yuhangtang Road Hangzhou 310058 China
| | - Chu-Jun Song
- Zhejiang University Tea Research Institute; 388 Yuhangtang Road Hangzhou 310058 China
| | - Hai-Rong Xu
- Zhejiang University Tea Research Institute; 388 Yuhangtang Road Hangzhou 310058 China
| | - Jian-Hui Ye
- Zhejiang University Tea Research Institute; 388 Yuhangtang Road Hangzhou 310058 China
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9
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Tan J, Engelhardt UH, Lin Z, Kaiser N, Maiwald B. Flavonoids, phenolic acids, alkaloids and theanine in different types of authentic Chinese white tea samples. J Food Compost Anal 2017. [DOI: 10.1016/j.jfca.2016.12.011] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Dai W, Xie D, Lu M, Li P, Lv H, Yang C, Peng Q, Zhu Y, Guo L, Zhang Y, Tan J, Lin Z. Characterization of white tea metabolome: Comparison against green and black tea by a nontargeted metabolomics approach. Food Res Int 2017; 96:40-45. [PMID: 28528106 DOI: 10.1016/j.foodres.2017.03.028] [Citation(s) in RCA: 134] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 02/14/2017] [Accepted: 03/10/2017] [Indexed: 01/25/2023]
Abstract
White tea is considered the least processed form of tea and is reported to have a series of potent bioactivities, such as antioxidant, anti-inflammatory, anti-mutagenic, and anti-cancer activities. However, the chemical composition of white tea and the dynamic changes of the metabolites during the manufacturing process are far from clear. In this study, we applied a nontargeted metabolomics approach based on ultra-high performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UHPLC-QTOF/MS) to comprehensively profile the characteristic metabolites of white tea. There were significant differences in the content of amino acids, catechins, dimeric catechins, flavonol and flavone glycosides, and aroma precursors in white tea compared with green and black teas that were manufactured from the same fresh tea leaves. Furthermore, the dynamic changes of the metabolites in the tea samples with various withering durations of 0, 4, 8, 12, 16, 20, 24, 28, and 36 h were also profiled. This study offers a comprehensive characterization of the metabolites and their changes in white tea.
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Affiliation(s)
- Weidong Dai
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling South Road, Hangzhou, Zhejiang 310008, PR China
| | - Dongchao Xie
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling South Road, Hangzhou, Zhejiang 310008, PR China
| | - Meiling Lu
- Agilent Technologies (China) Limited, No. 3 Wangjing North Road, Chaoyang Distr., Beijing 100102, PR China
| | - Pengliang Li
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling South Road, Hangzhou, Zhejiang 310008, PR China
| | - Haipeng Lv
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling South Road, Hangzhou, Zhejiang 310008, PR China
| | - Chen Yang
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling South Road, Hangzhou, Zhejiang 310008, PR China
| | - Qunhua Peng
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling South Road, Hangzhou, Zhejiang 310008, PR China
| | - Yin Zhu
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling South Road, Hangzhou, Zhejiang 310008, PR China
| | - Li Guo
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling South Road, Hangzhou, Zhejiang 310008, PR China
| | - Yue Zhang
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling South Road, Hangzhou, Zhejiang 310008, PR China
| | - Junfeng Tan
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling South Road, Hangzhou, Zhejiang 310008, PR China.
| | - Zhi Lin
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 Meiling South Road, Hangzhou, Zhejiang 310008, PR China.
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11
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Stepwise Identification of Six Tea (Camellia sinensis (L.)) Categories Based on Catechins, Caffeine, and Theanine Contents Combined with Fisher Discriminant Analysis. FOOD ANAL METHOD 2016. [DOI: 10.1007/s12161-016-0518-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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12
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Song JL, Zhou Y, Feng X, Zhao X. White tea (Camellia sinenesis (L.)) ethanol extracts attenuate reserpine-induced gastric ulcers in mice. Food Sci Biotechnol 2015. [DOI: 10.1007/s10068-015-0148-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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Bitu Pinto N, da Silva Alexandre B, Neves KRT, Silva AH, Leal LKAM, Viana GSB. Neuroprotective Properties of the Standardized Extract from Camellia sinensis (Green Tea) and Its Main Bioactive Components, Epicatechin and Epigallocatechin Gallate, in the 6-OHDA Model of Parkinson's Disease. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2015; 2015:161092. [PMID: 26167188 PMCID: PMC4488543 DOI: 10.1155/2015/161092] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2015] [Revised: 04/25/2015] [Accepted: 05/25/2015] [Indexed: 11/17/2022]
Abstract
Camellia sinensis (green tea) is largely consumed, mainly in Asia. It possesses several biological effects such as antioxidant and anti-inflammatory properties. The objectives were to investigate the neuroprotective actions of the standardized extract (CS), epicatechin (EC) and epigallocatechin gallate (EGCG), on a model of Parkinson's disease. Male Wistar rats were divided into SO (sham-operated controls), untreated 6-OHDA-lesioned and 6-OHDA-lesioned treated for 2 weeks with CS (25, 50, or 100 mg/kg), EC (10 mg/kg), or EGCG (10 mg/kg) groups. One hour after the last administration, animals were submitted to behavioral tests and euthanized and their striata and hippocampi were dissected for neurochemical (DA, DOPAC, and HVA) and antioxidant activity determinations, as well as immunohistochemistry evaluations (TH, COX-2, and iNOS). The results showed that CS and catechins reverted behavioral changes, indicating neuroprotection manifested as decreased rotational behavior, increased locomotor activity, antidepressive effects, and improvement of cognitive dysfunction, as compared to the untreated 6-OHDA-lesioned group. Besides, CS, EP, and EGCG reversed the striatal oxidative stress and immunohistochemistry alterations. These results show that the neuroprotective effects of CS and its catechins are probably and in great part due to its powerful antioxidant and anti-inflammatory properties, pointing out their potential for the prevention and treatment of PD.
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Affiliation(s)
- Natália Bitu Pinto
- Faculty of Medicine of the Federal University of Ceará, Rua Nunes de Melo 1127 (Rodolfo Teófilo), 60430-270 Fortaleza, CE, Brazil
- Faculty of Medicine Estácio of Juazeiro do Norte, Avenida Tenente Raimundo Rocha 515 (Cidade Universitária), 63048-080 Juazeiro do Norte, CE, Brazil
| | - Bruno da Silva Alexandre
- Faculty of Medicine Estácio of Juazeiro do Norte, Avenida Tenente Raimundo Rocha 515 (Cidade Universitária), 63048-080 Juazeiro do Norte, CE, Brazil
| | - Kelly Rose Tavares Neves
- Faculty of Medicine of the Federal University of Ceará, Rua Nunes de Melo 1127 (Rodolfo Teófilo), 60430-270 Fortaleza, CE, Brazil
| | - Aline Holanda Silva
- Faculty of Medicine of the Federal University of Ceará, Rua Nunes de Melo 1127 (Rodolfo Teófilo), 60430-270 Fortaleza, CE, Brazil
| | - Luzia Kalyne A. M. Leal
- Faculty of Medicine of the Federal University of Ceará, Rua Nunes de Melo 1127 (Rodolfo Teófilo), 60430-270 Fortaleza, CE, Brazil
| | - Glauce S. B. Viana
- Faculty of Medicine of the Federal University of Ceará, Rua Nunes de Melo 1127 (Rodolfo Teófilo), 60430-270 Fortaleza, CE, Brazil
- Faculty of Medicine Estácio of Juazeiro do Norte, Avenida Tenente Raimundo Rocha 515 (Cidade Universitária), 63048-080 Juazeiro do Norte, CE, Brazil
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14
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Daily consumption of white tea (Camellia sinensis (L.)) improves the cerebral cortex metabolic and oxidative profile in prediabetic Wistar rats. Br J Nutr 2015; 113:832-42. [PMID: 25716141 DOI: 10.1017/s0007114514004395] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Diabetes mellitus (DM) is a major public health problem and its incidence is rising dramatically. The brain, particularly the cerebral cortex, is very susceptible to glucose fluctuations and hyperglycaemia-induced oxidative stress. Tea (Camellia sinensis (L.)) is widely consumed; however, the antidiabetic properties of white tea remain largely unexplored. In the present study, we investigated the effects of daily consumption of white tea on the cerebral cortex of prediabetic rats. The cerebral cortex metabolic profile was evaluated, and the expression levels of GLUT, phosphofructokinase-1, lactate dehydrogenase (LDH) and monocarboxylate transporter 4 were assessed. LDH activity was also determined. The cerebral cortex oxidative profile was determined by evaluating its antioxidant power, lipid peroxidation and protein oxidation levels. Catalase, glutathione, glutamate, N-acetylaspartate, aspartate, choline, γ-aminobutyric acid, taurine and valine contents were determined. Daily consumption of white tea ameliorated glucose tolerance and insulin sensitivity. Moreover, white tea altered the cortex glycolytic profile, modulating GLUT expression and lactate and alanine contents. Finally, white tea consumption restored protein oxidation and lipid peroxidation levels and catalase expression, and improved antioxidant capacity. In conclusion, daily consumption of white tea improved the cerebral cortex metabolic and oxidative profile in prediabetic rats, suggesting it as a good, safe and inexpensive strategy to prevent DM-related effects in the cerebral cortex.
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15
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Nunes AR, Alves MG, Moreira PI, Oliveira PF, Silva BM. Can Tea Consumption be a Safe and Effective Therapy Against Diabetes Mellitus-Induced Neurodegeneration? Curr Neuropharmacol 2014; 12:475-89. [PMID: 25977676 PMCID: PMC4428023 DOI: 10.2174/1570159x13666141204220539] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Revised: 10/10/2014] [Accepted: 12/03/2014] [Indexed: 12/20/2022] Open
Abstract
Diabetes mellitus (DM) is a metabolic disease that is rapidly increasing and has become a major public health problem. Type 2 DM (T2DM) is the most common type, accounting for up to 90-95% of the new diagnosed DM cases. The brain is very susceptible to glucose fluctuations and hyperglycemia-induced oxidative stress (OS). It is well known that DM and the risk of developing neurodegenerative diseases are associated. Tea, Camellia sinensis L., is one of the most consumed beverages. It contains several phytochemicals, such as polyphenols, methylxanthines (mainly caffeine) and L-theanine that are often reported to be responsible for tea's health benefits, including in brain. Tea phytochemicals have been reported to be responsible for tea's significant antidiabetic and neuroprotective properties and antioxidant potential. Epidemiological studies have shown that regular consumption of tea has positive effects on DM-caused complications and protects the brain against oxidative damage, contributing to an improvement of the cognitive function. Among the several reported benefits of tea consumption, those related with neurodegenerative diseases are of great interest. Herein, we discuss the potential beneficial effects of tea consumption and tea phytochemicals on DM and how their action can counteract the severe brain damage induced by this disease.
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Affiliation(s)
- Ana R. Nunes
- CICS – UBI – Health Sciences Research Centre, University of Beira Interior, 6201-506 Covilhã, Portugal
| | - Marco G. Alves
- CICS – UBI – Health Sciences Research Centre, University of Beira Interior, 6201-506 Covilhã, Portugal
| | - Paula I. Moreira
- CNC – Center for Neuroscience and Cell Biology, University of Coimbra and Laboratory of Physiology, Faculty of Medicine, University of Coimbra, 3004-517 Coimbra, Portugal
| | - Pedro F. Oliveira
- CICS – UBI – Health Sciences Research Centre, University of Beira Interior, 6201-506 Covilhã, Portugal
| | - Branca M. Silva
- CICS – UBI – Health Sciences Research Centre, University of Beira Interior, 6201-506 Covilhã, Portugal
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Modelling Extraction of White Tea Polyphenols: The Influence of Temperature and Ethanol Concentration. Antioxidants (Basel) 2014; 3:684-99. [PMID: 26785234 PMCID: PMC4665501 DOI: 10.3390/antiox3040684] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 07/29/2014] [Accepted: 09/30/2014] [Indexed: 12/04/2022] Open
Abstract
The optimization of the extraction of natural antioxidants from white tea has fostered intensive research. This study has investigated the effects of ethanol-water mixtures, temperature and time on the extraction of polyphenols and antioxidant components from white tea. The response surface methodology was applied to identify the best extraction conditions. The best conditions to maximize the extraction of total polyphenols were: ethanol, 50%, for 47.5 min. Although the yield of polyphenols was optimal at 65 °C, the maximum antioxidant capacity was achieved with an extraction temperature of 90 °C. This study has identified the optimal conditions for the extraction of tea liquor with the best antioxidant properties. Epigallocatechin gallate, epicatechin gallate, epigallocatechin and epicatechin were extracted from white tea at concentrations up to 29.6 ± 10.6, 5.40 ± 2.09, 5.04 ± 0.20 and 2.48 ± 1.10 mg/100 g.
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17
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Wu QJ, Dong QH, Sun WJ, Huang Y, Wang QQ, Zhou WL. Discrimination of Chinese teas with different fermentation degrees by stepwise linear discriminant analysis (S-LDA) of the chemical compounds. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:9336-9344. [PMID: 25211192 DOI: 10.1021/jf5025483] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This study aimed to construct objective and accurate analytical models of tea categories based on their polyphenols and caffeine. A total of 522 tea samples of 4 commonly consumed teas with different fermentation degrees (green tea, white tea, oolong tea, and black tea) were analyzed by high-performance liquid chromatography (HPLC) coupled with spectrophotometry, utilizing ISO 14502, as analytical tools. The content of polyphenols and caffeine varied significantly according to differently fermented teas, indicating that these active constituents may discriminate fermentation degrees effectively. By principal component analysis (PCA) and stepwise linear discriminant analysis (S-LDA), the vast majority of tea samples could be successfully differentiated according to their chemical markers. This study yielded three discriminant functions with the capacity to simultaneously discriminate the four tea categories with a 97.8% correct rate. In classification of oolong and other teas, there were one discriminant function and two equations with best discriminant capacity. Furthermore, the classification of different degrees of fermentation of oolong and external validation achieved the desired results. It is suggested that polyphenols and caffeine are the distinct variables to establish internationally recognized models of teas.
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Affiliation(s)
- Quan-Jin Wu
- College of Horticulture and ‡Anxi College of Tea Science, Fujian Agriculture and Forestry University , No. 15 Shangxiadian Road, Cangshan, Fuzhou 350002, China
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18
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Im AR, Kim YH, Uddin MR, Chae S, Lee HW, Kim YS, Lee MY. Neuroprotective effects of Lycium chinense Miller against rotenone-induced neurotoxicity in PC12 cells. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2014; 41:1343-59. [PMID: 24228605 DOI: 10.1142/s0192415x13500900] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Rotenone, an inhibitor of mitochondrial complex I, has been widely regarded as a neurotoxin because it induces a Parkinson's disease-like syndrome. The fruit and root bark of Lycium chinense Miller have been used as traditional medicines in Asia to treat neurodegenerative diseases. In this study, we examined the neuroprotective effects of Lycium chinense Miller extracts in rotenone-treated PC12 cells. Treatment with rotenone reduced PC12 cell viability and cellular ATP levels. Conversely, caspase 3/7 activity, the ratio of Bax:Bcl-2 expression levels, mitochondrial superoxide level, and intracellular calcium (Ca(2+)) concentration were elevated. Pretreatment with Lycium chinense Miller extracts significantly increased cell viability and ATP levels. Additionally, they attenuated caspase activation, mitochondrial membrane depolarization and mitochondrial superoxide production. Moreover, confocal microscopy showed that the mitochondrial staining pattern was restored from that of extracts treated cells and that the increase in intracellular Ca (2+) level was blunted by treatment with the extracts. Our results suggest that Lycium chinense Miller extracts may have the possible beneficial effects in Parkinson's disease by attenuating rotenone induced toxicity.
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Affiliation(s)
- A-Rang Im
- KM-Based Herbal Drug Research Group, Korea Institute of Oriental Medicine, Daejeon 305-811, South Korea
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Damiani E, Bacchetti T, Padella L, Tiano L, Carloni P. Antioxidant activity of different white teas: Comparison of hot and cold tea infusions. J Food Compost Anal 2014. [DOI: 10.1016/j.jfca.2013.09.010] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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20
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Crichton GE, Bryan J, Murphy KJ. Dietary antioxidants, cognitive function and dementia--a systematic review. PLANT FOODS FOR HUMAN NUTRITION (DORDRECHT, NETHERLANDS) 2013; 68:279-292. [PMID: 23881465 DOI: 10.1007/s11130-013-0370-0] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Antioxidant compounds, contained in fruit, vegetables and tea, have been postulated to have a protective effect against age-related cognitive decline by combating oxidative stress. However, recent research on this subject has been conflicting. The aim of this systematic review was to consider current epidemiological and longitudinal evidence for an association between habitual dietary intake of antioxidants and cognition, with consideration given to both cognitive functioning and risk for dementia and its subtypes, including Alzheimer's disease and vascular dementia. Searches of electronic databases were undertaken to identify peer-reviewed journal articles that reported on associations between antioxidant intakes (vitamins C, E, flavonoids, carotenoids) and cognitive function or risk for dementia. Eight cross-sectional and 13 longitudinal studies were identified and included in the review. There were mixed findings for the association between antioxidant intake, cognition and risk of dementia and Alzheimer's disease. Large heterogeneity in study design, differential control of confounders, insufficient measures of cognitive performance, and difficulties associated with dietary assessment may contribute to the inconsistent findings. Overall, findings do not consistently show habitual intakes of dietary antioxidants are associated with better cognitive performance or a reduced risk for dementia. Future intervention trials are warranted to elucidate the effects of a high intake of dietary antioxidants on cognitive functioning, and to explore effects within a whole dietary pattern.
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Affiliation(s)
- Georgina E Crichton
- Nutritional Physiology Research Centre, University of South Australia, Adelaide, Australia
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21
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Alinezhad H, Zare M, Nabavi SF, Naqinezhad A, Nabavi SM. Antioxidant, antihemolytic, and inhibitory activities of endemic Primula heterochroma against Fe2+-induced lipid peroxidation and oxidative stress in rat brain in vitro. PHARMACEUTICAL BIOLOGY 2012; 50:1391-1396. [PMID: 22900682 DOI: 10.3109/13880209.2012.676050] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
CONTEXT The genus Primula (Primulaceae) has been used in traditional medicine to treat convulsion and microbial or viral infections. OBJECTIVE In the present study, we evaluate antioxidant, antihemolytic, and protective effects of flavonoid-rich fractions of endemic Primula heterochroma Stapf. (Primulaceae) against Fe(2+)-induced lipid peroxidation and oxidative stress in rat brain in vitro. MATERIALS AND METHODS Aerial parts of plant were defatted and extracted with 60% acetone. Then, 60% acetone extract was fractionated sequentially with n-hexane, ethyl acetate, and water. Antioxidant activity of fractions was evaluated by employing six different assays, i.e., 1,1-diphenyl-2-picryl hydrazyl (DPPH) and hydrogen peroxide scavenging, metal chelating and reducing power activities and hemoglobin-induced linoleic acid system and Fe(2+)-induced lipid peroxidation and oxidative stress in rat brain. Also, its antihemolytic activity was determined using 2,2'-azobis(2-amidinopropane) dihydrochloride-induced hemolysis in rat erythrocyts. RESULTS Among the flavonoid-rich fractions of Primula heterochroma, aqueous fraction demonstrated the most protective effect through decreasing brain thiobarbituric acid reactive substances (TBARS) levels at a dose 200 μg mL(-1) (40%, p < 0.001 versus iron group). Also, the aqueous fraction showed better activity in Fe(2+) chelating (89 ± 3.8 μg mL(-1)) and DPPH radical scavenging (394.4 ± 18.4 μg mL(-1)) models than other fractions. The probable protective mechanism of flavonoid-rich fractions may be attributed to their Fe(2+) chelating, DPPH radical scavenging and reducing power activities. Also, the n-hexane fraction demonstrated a higher protective effect in the hemoglobin-induced linoleic acid system and 2,2'-azobis(2-amidinopropane) dihydrochloride-induced hemolysis (67 ± 2.6 μg mL(-1)). DISCUSSION AND CONCLUSION Results of this study demonstrate Primula heterochroma is a rich source of natural antioxidant compounds.
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Affiliation(s)
- Heshmatollah Alinezhad
- Department of Organic Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar, Iran
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22
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Teixeira LG, Lages PC, Jascolka TL, Aguilar EC, Soares FLP, Pereira SS, Beltrão NRM, Matoso RDO, Nascimento AMD, Castilho ROD, Leite JIA. White tea (Camellia sinensis) extract reduces oxidative stress and triacylglycerols in obese mice. FOOD SCIENCE AND TECHNOLOGY 2012. [DOI: 10.1590/s0101-20612012005000099] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
White tea is an unfermented tea made from young shoots of Camellia sinensis protected from sunlight to avoid polyphenol degradation. Although its levels of catechins are higher than those of green tea (derived from the same plant), there are no studies addressing the relationship between this tea and obesity associated with oxidative stress.The objective of this study was to evaluate the effect of white tea on obesity and its complications using a diet induced obesity model. Forty male C57BL/6 mice were fed a high-fat diet to induce obesity (Obese group) or the same diet supplemented with 0.5% white tea extract (Obese + WTE) for 8 weeks. Adipose tissue, serum lipid profile, and oxidative stress were studied. White tea supplementation was not able to reduce food intake, body weight, or visceral adiposity. Similarly, there were no changes in cholesterol rich lipoprotein profile between the groups. A reduction in blood triacylglycerols associated with increased cecal lipids was observed in the group fed the diet supplemented with white tea. White tea supplementation also reduced oxidative stress in liver and adipose tissue. In conclusion, white tea extract supplementation (0.5%) does not influence body weight or adiposity in obese mice. Its benefits are restricted to the reduction in oxidative stress associated with obesity and improvement of hypertriacylglycerolemia.
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Neuroprotective Effects of White Tea Against Oxidative Stress-Induced Toxicity in Striatal Cells. Neurotox Res 2011; 20:372-8. [DOI: 10.1007/s12640-011-9252-0] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2011] [Revised: 05/25/2011] [Accepted: 06/14/2011] [Indexed: 12/14/2022]
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