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Yi Z, Ran Y, Chen X, Tong Q, Ma L, Tan Y, Ma X, Li X. Tea polyphenol carrier-enhanced dexamethasone nanomedicines for inflammation-targeted treatment of rheumatoid arthritis. J Mater Chem B 2023; 11:11505-11518. [PMID: 38038124 DOI: 10.1039/d3tb02316h] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
Abstract
Rheumatoid arthritis (RA) is a chronic autoimmune inflammatory disease characterized by synovial inflammation, cartilage damage and bone erosion. In the progression of RA, the inflammatory mediators including ROS, NO, TNF-α, and IL-6 play important roles in the aggravation of inflammation. Hence, reducing the generation and release of inflammatory mediators is of great importance. However, the high dose and frequent administration of clinical anti-inflammatory drugs such as glucocorticoids (GCs) usually lead to severe side effects. The development of nanotechnology provides a promising strategy to overcome these issues. Here, polyphenol-based nanoparticles with inherent anti-oxidative and anti-inflammatory activities were developed and used as a kind of nanocarrier to deliver dexamethasone (Dex). The in vitro experiments confirmed that the nanoparticles and drugs could act synergistically for suppressing inflammatory mediators in the LPS/INF-γ-induced inflammatory cell model. After intravenous administration, the Dex-loaded nanoparticles with good biosafety showed effective accumulation in inflamed joints and improved therapeutic efficacy by inducing anesis of synovial inflammation and cartilage destruction over free Dex in a collagen-induced arthritis (CIA) mouse model. The results demonstrated that polyphenol-based nanoparticles with therapeutic functions may serve as an innovative platform to synergize with chemotherapeutic agents for enhanced treatment of inflammatory diseases.
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Affiliation(s)
- Zeng Yi
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China.
- College of Biomedical Engineering, Sichuan University, Chengdu 610064, China
| | - Yaqin Ran
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China.
- College of Biomedical Engineering, Sichuan University, Chengdu 610064, China
| | - Xiangyu Chen
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China.
- College of Biomedical Engineering, Sichuan University, Chengdu 610064, China
| | - Qiulan Tong
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China.
- College of Biomedical Engineering, Sichuan University, Chengdu 610064, China
| | - Lei Ma
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China.
- College of Biomedical Engineering, Sichuan University, Chengdu 610064, China
| | - Yunfei Tan
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China.
- College of Biomedical Engineering, Sichuan University, Chengdu 610064, China
| | - Xiaomin Ma
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China.
- College of Biomedical Engineering, Sichuan University, Chengdu 610064, China
| | - Xudong Li
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China.
- College of Biomedical Engineering, Sichuan University, Chengdu 610064, China
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2
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Hwang S, Koo I, Patterson AD, Lambert JD. Comparative urine metabolomics of mice treated with non-toxic and toxic oral doses of (-)-epigallocatechin-3-gallate. Food Funct 2023; 14:9434-9445. [PMID: 37796030 DOI: 10.1039/d3fo02710d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/06/2023]
Abstract
The green tea polyphenol, (-)-epigallocatechin-3-gallate (EGCG), has been studied for its potential positive health effects, but human and animal model studies have reported potential toxicity at high oral bolus doses. This study used liquid chromatography-mass spectrometry-based metabolomics to compare the urinary EGCG metabolite profile after administration of a single non-toxic (100 mg kg-1) or toxic (750 mg kg-1) oral bolus dose to male C57BL6/J mice to better understand how EGCG metabolism varies with dose. EGCG metabolites, including methyl, glucuronide, sulfate, and glucoside conjugates, were tentatively identified based on their mass to charge (m/z) ratio and fragment ion patterns. Partial least squares discriminant analysis (PLS-DA) results showed clear separation of the urine metabolite profiles between treatment groups. The most differentiating metabolites in the negative and positive ion modes were provisionally identified as di-glucuronidated EGCG quinone and di-glucuronidated EGCG, respectively. The presence of EGCG oxidation products at toxic dose is consistent with studies showing that EGCG toxicity is associated with oxidative stress. Relative amounts of methylated metabolites increased with dose to a lesser extent than glucuronide and sulfate metabolites, indicating that methylation is more prominent at low doses, whereas glucuronidation and sulfation may be more important at higher doses. One limitation of the current work is that the lack of commercially-available EGCG metabolite standards prevented absolute metabolite quantification and identification. Despite this limitation, these findings provide a basis for better understanding the dose-dependent changes in EGCG metabolism and advance studies on how these differences may contribute to the toxicity of high doses of EGCG.
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Affiliation(s)
- Soomee Hwang
- Department of Food Science, The Pennsylvania State University, 332 Food Science Building, University Park, PA 16802, USA.
| | - Imhoi Koo
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA 16802, USA
| | - Andrew D Patterson
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA 16802, USA
- Center for Molecular Toxicology and Carcinogenesis, The Pennsylvania State University, University Park, PA 16802, USA
| | - Joshua D Lambert
- Department of Food Science, The Pennsylvania State University, 332 Food Science Building, University Park, PA 16802, USA.
- Center for Molecular Toxicology and Carcinogenesis, The Pennsylvania State University, University Park, PA 16802, USA
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3
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Jermjun K, Khumho R, Thongoiam M, Yousatit S, Yokoi T, Ngamcharussrivichai C, Nuntang S. Natural Rubber/Hexagonal Mesoporous Silica Nanocomposites as Efficient Adsorbents for the Selective Adsorption of (-)-Epigallocatechin Gallate and Caffeine from Green Tea. Molecules 2023; 28:6019. [PMID: 37630270 PMCID: PMC10458317 DOI: 10.3390/molecules28166019] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 08/02/2023] [Accepted: 08/09/2023] [Indexed: 08/27/2023] Open
Abstract
(-)-Epigallocatechin gallate (EGCG) is a bioactive component of green tea that provides many health benefits. However, excessive intake of green tea may cause adverse effects of caffeine (CAF) since green tea (30-50 mg) has half the CAF content of coffee (80-100 mg). In this work, for enhancing the health benefits of green tea, natural rubber/hexagonal mesoporous silica (NR/HMS) nanocomposites with tunable textural properties were synthesized using different amine template sizes and applied as selective adsorbents to separate EGCG and CAF from green tea. The resulting adsorbents exhibited a wormhole-like silica framework, high specific surface area (528-578 m2 g-1), large pore volume (0.76-1.45 cm3 g-1), and hydrophobicity. The NR/HMS materials adsorbed EGCG more than CAF; the selectivity coefficient of EGCG adsorption was 3.6 times that of CAF adsorption. The EGCG adsorption capacity of the NR/HMS series was correlated with their pore size and surface hydrophobicity. Adsorption behavior was well described by a pseudo-second-order kinetic model, indicating that adsorption involved H-bonding interactions between the silanol groups of the mesoporous silica surfaces and the hydroxyl groups of EGCG and the carbonyl group of CAF. As for desorption, EGCG was more easily removed than CAF from the NR/HMS surface using an aqueous solution of ethanol. Moreover, the NR/HMS materials could be reused for EGCG adsorption at least three times. The results suggest the potential use of NR/HMS nanocomposites as selective adsorbents for the enrichment of EGCG in green tea. In addition, it could be applied as an adsorbent in the filter to reduce the CAF content in green tea by up to 81.92%.
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Affiliation(s)
- Kamolwan Jermjun
- Industrial Chemistry Innovation Program, Faculty of Science, Maejo University, Chiang Mai 50290, Thailand;
| | - Rujeeluk Khumho
- Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; (R.K.); (M.T.); (S.Y.); (C.N.)
| | - Mookarin Thongoiam
- Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; (R.K.); (M.T.); (S.Y.); (C.N.)
| | - Satit Yousatit
- Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; (R.K.); (M.T.); (S.Y.); (C.N.)
| | - Toshiyuki Yokoi
- Chemical Resources Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan;
| | - Chawalit Ngamcharussrivichai
- Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; (R.K.); (M.T.); (S.Y.); (C.N.)
- Center of Excellence on Petrochemical and Materials Technology (PETROMAT), Chulalongkorn University, Bangkok 10330, Thailand
- Center of Excellence in Catalysis for Bioenergy and Renewable Chemicals (CBRC), Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Sakdinun Nuntang
- Industrial Chemistry Innovation Program, Faculty of Science, Maejo University, Chiang Mai 50290, Thailand;
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4
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Mechanism of (−)-epigallocatechin gallate (EGCG) dimerization by low-temperature plasma. Sci Rep 2022; 12:15396. [PMID: 36100688 PMCID: PMC9470551 DOI: 10.1038/s41598-022-19806-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 09/05/2022] [Indexed: 11/12/2022] Open
Abstract
The efficient dimerization of (−)-Epigallocatechin gallate (EGCG), which is the major bioactive constituent isolated from the leaves of Camellia sinensis, was initially reported without changes in its stereochemistry using low-temperature plasma. The contribution of plasma during the dimerization of EGCG in a methanolic solution was quantified using a major factor, with the major factor demonstrated based on the contents of newly generated products, in this case the sum of oolonghomobisflavans A and B depending on the plasma treatment method. Samples were treated in three methods: plasma direct treatment, an indirect treatment using only reactive species, and an indirect treatment using effects other than those by reactive species. Ozone was identified as a major factor during the plasma treatment, and the operating ranges of the ozone concentration for regulated dimerization were evaluated. The mechanism by which EGCG synthesizes dimers A and B during the treatment process using low-temperature plasma was investigated using the derived major factor and prior literature. The ozone generated by the plasma reacted with methanol to form formaldehyde, and dimers A and B were synthesized by oligomers through a methylene-bridge by the formaldehyde. A plausible pathway of regulated dimerization was deduced based on these results, and the mechanism of EGCG dimerization by plasma is described using this pathway.
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5
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Bae KH, Chan KH, Kurisawa M. Autoxidation-Resistant, ROS-Scavenging, and Anti-Inflammatory Micellar Nanoparticles Self-Assembled from Poly(acrylic acid)-Green Tea Catechin Conjugates. ACS Macro Lett 2022; 11:835-840. [PMID: 35713474 DOI: 10.1021/acsmacrolett.2c00239] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
(-)-Epigallocatechin-3-O-gallate (EGCG), the most bioactive catechin in green tea, has drawn significant interest as a potent antioxidant and anti-inflammatory compound. However, the application of EGCG has been limited by its rapid autoxidation at physiological pH, which generates cytotoxic levels of reactive oxygen species (ROS). Herein, we report the synthesis of poly(acrylic acid)-EGCG conjugates with tunable degrees of substitution and their spontaneous self-assembly into micellar nanoparticles with enhanced resistance against autoxidation. These nanoparticles not only exhibited superior oxidative stability and cytocompatibility over native EGCG, but also showed excellent ROS-scavenging and anti-inflammatory effects. This work presents a potential strategy to overcome the stability and cytotoxicity issues of EGCG, making it one step closer toward its widespread application.
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Affiliation(s)
- Ki Hyun Bae
- Institute of Bioengineering and Bioimaging, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore
| | - Kiat Hwa Chan
- Division of Science, Yale-NUS College, 16 College Avenue West, Singapore 138527, Singapore
| | - Motoichi Kurisawa
- Institute of Bioengineering and Bioimaging, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore
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Tang T, Yu J, Yuan L, Lu L, Tang Y. Frontier Orbitals and Аctive Site of Тea Рolyphenol Мolecules Epigallocatechin Gallate and Gallocatechin Gallate. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2021. [DOI: 10.1134/s0036024421090284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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7
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Abbaszadeh F, Fakhri S, Khan H. Targeting apoptosis and autophagy following spinal cord injury: Therapeutic approaches to polyphenols and candidate phytochemicals. Pharmacol Res 2020; 160:105069. [PMID: 32652198 DOI: 10.1016/j.phrs.2020.105069] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 06/28/2020] [Accepted: 07/03/2020] [Indexed: 12/11/2022]
Abstract
Spinal cord injury (SCI) is a neurological disorder associated with the loss of sensory and motor function. Understanding the precise dysregulated signaling pathways, especially apoptosis and autophagy following SCI, is of vital importance in developing innovative therapeutic targets and treatments. The present study lies in the fact that it reveals the precise dysregulated signaling mediators of apoptotic and autophagic pathways following SCI and also examines the effects of polyphenols and other candidate phytochemicals. It provides new insights to develop new treatments for post-SCI complications. Accordingly, a comprehensive review was conducted using electronic databases including, Scopus, Web of Science, PubMed, and Medline, along with the authors' expertise in apoptosis and autophagy as well as their knowledge about the effects of polyphenols and other phytochemicals on SCI pathogenesis. The primary mechanical injury to spinal cord is followed by a secondary cascade of apoptosis and autophagy that play critical roles during SCI. In terms of pharmacological mechanisms, caspases, Bax/Bcl-2, TNF-α, and JAK/STAT in apoptosis along with LC3 and Beclin-1 in autophagy have shown a close interconnection with the inflammatory pathways mainly glutamatergic, PI3K/Akt/mTOR, ERK/MAPK, and other cross-linked mediators. Besides, apoptotic pathways have been shown to regulate autophagy mediators and vice versa. Prevailing evidence has highlighted the importance of modulating these signaling mediators/pathways by polyphenols and other candidate phytochemicals post-SCI. The present review provides dysregulated signaling mediators and therapeutic targets of apoptotic and autophagic pathways following SCI, focusing on the modulatory effects of polyphenols and other potential phytochemical candidates.
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Affiliation(s)
- Fatemeh Abbaszadeh
- Department of Neuroscience, Faculty of Advanced Technologies in Medical Sciences, Iran University of Medical Sciences, Tehran, Iran; Neurobiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sajad Fakhri
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah 6734667149, Iran.
| | - Haroon Khan
- Department of Pharmacy, Abdul Wali Khan University Mardan, 23200, Pakistan.
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8
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Cambaza E, Sultane H. Update on the Evaluation of the Anti-Obesity Effect of Green Tea (Camellia sinensis). CLINICAL AND EXPERIMENTAL HEALTH SCIENCES 2019. [DOI: 10.33808/clinexphealthsci.523921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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9
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Tea Polyphenols Reducing Lipopolysaccharide-induced Inflammatory Responses in RAW264.7 Macrophages via NF-κB Pathway. Chem Res Chin Univ 2019. [DOI: 10.1007/s40242-019-8376-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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10
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11
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Pham DC, Chang YC, Lin SR, Fuh YM, Tsai MJ, Weng CF. FAK and S6K1 Inhibitor, Neferine, Dually Induces Autophagy and Apoptosis in Human Neuroblastoma Cells. Molecules 2018; 23:molecules23123110. [PMID: 30486505 PMCID: PMC6321370 DOI: 10.3390/molecules23123110] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2018] [Revised: 11/24/2018] [Accepted: 11/25/2018] [Indexed: 12/13/2022] Open
Abstract
Human neuroblastoma cancer is the most typical extracranial solid tumor. Yet, new remedial treatment therapies are demanded to overcome its sluggish survival rate. Neferine, isolated from the lotus embryos, inhibits the proliferation of various cancer cells. This study aimed to evaluate the anti-cancer activity of neferine in IMR32 human neuroblastoma cells and to expose the concealable molecular mechanisms. IMR32 cells were treated with different concentrations of neferine, followed by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay to assess cell viability. In an effort to determine the molecular mechanisms in neferine-incubated IMR32 cells, cell cycle arrest, cell migration, and focal adhesion kinase (FAK), the 70-kDa ribosomal S6 kinase 1 (S6K1), poly (ADP-ribose) polymerase (PARP), caspase-3, Beclin-1, and microtubule-associated protein 1A/1B-light chain 3 (LC3) protein expressions were investigated. Neferine strongly disrupted the neuroblastoma cell growth via induction of G2/M phase arrest. Furthermore, neferine provoked autophagy and apoptosis in IMR32 cells, confirmed by p-FAK, and p-S6K1 reduction, LC3-II accumulation, Beclin-1 overexpression, and cleaved caspase-3/PARP improvement. Finally, neferine markedly retarded cell migration of neuroblastoma cancer cells. As a result, our findings for the first time showed an explicit anti-cancer effect of neferine in IMR32 cells, suggesting that neferine might be a potential candidate against human neuroblastoma cells to improve clinical outcomes with further in vivo investigation.
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Affiliation(s)
- Dinh-Chuong Pham
- Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City 700000, Vietnam.
| | - Yu-Chuan Chang
- Department of Life Science and Institute of Biotechnology, National Dong Hwa University, Shoufeng, Hualien 97401, Taiwan.
| | - Shian-Ren Lin
- Department of Life Science and Institute of Biotechnology, National Dong Hwa University, Shoufeng, Hualien 97401, Taiwan.
| | - Yuh-Ming Fuh
- Department of Life Science and Institute of Biotechnology, National Dong Hwa University, Shoufeng, Hualien 97401, Taiwan.
| | - May-Jywan Tsai
- Neural Regeneration Laboratory, Taipei Veterans General Hospital, Taipei 11260, Taiwan.
| | - Ching-Feng Weng
- Department of Life Science and Institute of Biotechnology, National Dong Hwa University, Shoufeng, Hualien 97401, Taiwan.
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12
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Bonam SR, Wu YS, Tunki L, Chellian R, Halmuthur MSK, Muller S, Pandy V. What Has Come out from Phytomedicines and Herbal Edibles for the Treatment of Cancer? ChemMedChem 2018; 13:1854-1872. [PMID: 29927521 DOI: 10.1002/cmdc.201800343] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 06/19/2018] [Indexed: 12/20/2022]
Abstract
Several modern treatment strategies have been adopted to combat cancer with the aim of minimizing toxicity. Medicinal plant-based compounds with the potential to treat cancer have been widely studied in preclinical research and have elicited many innovations in cutting-edge clinical research. In parallel, researchers have eagerly tried to decrease the toxicity of current chemotherapeutic agents either by combining them with herbals or in using herbals alone. The aim of this article is to present an update of medicinal plants and their bioactive compounds, or mere changes in the bioactive compounds, along with herbal edibles, which display efficacy against diverse cancer cells and in anticancer therapy. It describes the basic mechanism(s) of action of phytochemicals used either alone or in combination therapy with other phytochemicals or herbal edibles. This review also highlights the remarkable synergistic effects that arise between certain herbals and chemotherapeutic agents used in oncology. The anticancer phytochemicals used in clinical research are also described; furthermore, we discuss our own experience related to semisynthetic derivatives, which are developed based on phytochemicals. Overall, this compilation is intended to facilitate research and development projects on phytopharmaceuticals for successful anticancer drug discovery.
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Affiliation(s)
- Srinivasa Reddy Bonam
- UMR 7242 CNRS, Biotechnology and Cell Signaling, University of Strasbourg, Laboratory of Excellence Medalis, Illkirch, 67400, France.,Vaccine Immunology Laboratory, Natural Product Chemistry Division, CSIR - Indian Institute of Chemical Technology (IICT), Hyderabad, 500007, India.,Academy of Scientific and Innovative Research, CSIR - Indian Institute of Chemical Technology, Hyderabad, 500007, India
| | - Yuan Seng Wu
- Department of Pharmacology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Lakshmi Tunki
- Vaccine Immunology Laboratory, Natural Product Chemistry Division, CSIR - Indian Institute of Chemical Technology (IICT), Hyderabad, 500007, India
| | - Ranjithkumar Chellian
- Department of Pharmacology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Mahabalarao Sampath Kumar Halmuthur
- Vaccine Immunology Laboratory, Natural Product Chemistry Division, CSIR - Indian Institute of Chemical Technology (IICT), Hyderabad, 500007, India.,Academy of Scientific and Innovative Research, CSIR - Indian Institute of Chemical Technology, Hyderabad, 500007, India
| | - Sylviane Muller
- UMR 7242 CNRS, Biotechnology and Cell Signaling, University of Strasbourg, Laboratory of Excellence Medalis, Illkirch, 67400, France.,University of Strasbourg Institute for Advanced Study (USIAS), Strasbourg, 67000, France
| | - Vijayapandi Pandy
- Department of Pharmacology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia.,Department of Pharmacology, Chalapathi Institute of Pharmaceutical Sciences, Lam, Guntur, Andhra Pradesh, 522034, India
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13
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The Anti-Obesity Effects of Green Tea: A Controlled, Randomized, Clinical Trial. IRANIAN RED CRESCENT MEDICAL JOURNAL 2018. [DOI: 10.5812/ircmj.55950] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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14
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Song X, Zhang M, Chen L, Lin Q. Bioinformatic Prediction of Possible Targets and Mechanisms of Action of the Green Tea Compound Epigallocatechin-3-Gallate Against Breast Cancer. Front Mol Biosci 2017; 4:43. [PMID: 28713815 PMCID: PMC5492114 DOI: 10.3389/fmolb.2017.00043] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Accepted: 06/13/2017] [Indexed: 01/13/2023] Open
Abstract
Epigallocatechin-3-gallate (EGCG), a bioactive compound in green tea, is the most abundant and biologically active catechin, and it exerts multiple effects in humans through mechanisms that remain to be clarified. The present study used bioinformatics to identify possible mechanisms by which EGCG reduces risk of breast cancer. Possible human protein targets of EGCG were identified in the PubChem database, possible human gene targets were identified in the NCBI database, and then both sets of targets were analyzed using Ingenuity Pathway Analysis to predict molecular networks affected by EGCG in breast cancer. The results suggest that signaling proteins affected by EGCG in breast cancer, which include JUN, FADD, NFKB1, Bcl-2, GNAO1, and MMP14, are involved primarily in cell death and survival; DNA replication, recombination and repair; and the cell cycle. The main networks affected by EGCG are predicted to involve the cell cycle; cellular assembly and organization; DNA replication, recombination and repair; and cell death and survival. These results identify several specific proteins and pathways that may be affected by EGCG in breast cancer, and they illustrate the power of integrative bioinformatics and chemical fragment analysis for focusing mechanistic studies.
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Affiliation(s)
- Xinqiang Song
- Department of Biological Sciences, Xinyang Normal UniversityHenan, China.,Department of Biological Sciences, National University of SingaporeSingapore, Singapore
| | - Mu Zhang
- Hospital Attached to Xinyang Normal UniversityXinyang, China
| | - Lei Chen
- Department of Biological Sciences, Xinyang Normal UniversityHenan, China
| | - Qingsong Lin
- Department of Biological Sciences, National University of SingaporeSingapore, Singapore
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15
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Harati K, Behr B, Wallner C, Daigeler A, Hirsch T, Jacobsen F, Renner M, Harati A, Lehnhardt M, Becerikli M. Anti‑proliferative activity of epigallocatechin‑3‑gallate and silibinin on soft tissue sarcoma cells. Mol Med Rep 2016; 15:103-110. [PMID: 27909727 PMCID: PMC5355719 DOI: 10.3892/mmr.2016.5969] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2016] [Accepted: 10/26/2016] [Indexed: 12/17/2022] Open
Abstract
Disseminated soft tissue sarcomas (STS) present a therapeutic dilemma. The first-line cytostatic doxorubicin demonstrates a response rate of 30% and is not suitable for elderly patients with underlying cardiac disease, due to its cardiotoxicity. Well‑tolerated alternative treatment options, particularly in palliative situations, are rare. Therefore, the present study assessed the anti‑proliferative effects of the natural compounds epigallocatechin-3-gallate (EGCG), silibinin and noscapine on STS cells. A total of eight different human STS cell lines were used in the study: Fibrosarcoma (HT1080), liposarcoma (SW872, T778 and MLS‑402), synovial sarcoma (SW982, SYO1 and 1273) and pleomorphic sarcoma (U2197). Cell proliferation and viability were analysed by 5‑bromo-2'-deoxyuridine and MTT assays and real‑time cell analysis (RTCA). RTCA indicated that noscapine did not exhibit any inhibitory effects. By contrast, EGCG decreased proliferation and viability of all cell lines except for the 1273 synovial sarcoma cell line. Silibinin exhibited anti‑proliferative effects on all synovial sarcoma, liposarcoma and fibrosarcoma cell lines. Liposarcoma cell lines responded particularly well to EGCG while synovial sarcoma cell lines were more sensitive to silibinin. In conclusion, the green tea polyphenol EGCG and the natural flavonoid silibinin from milk thistle suppressed the proliferation and viability of liposarcoma, synovial sarcoma and fibrosarcoma cells. These compounds are therefore potential candidates as mild therapeutic options for patients that are not suitable for doxorubicin‑based chemotherapy and require palliative treatment. The findings from the present study provide evidence to support in vivo trials assessing the effect of these natural compounds on solid sarcomas.
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Affiliation(s)
- Kamran Harati
- Department of Plastic Surgery, Burn Center, Hand Center, Sarcoma Reference Center, BG‑University Hospital Bergmannsheil, D‑44789 Bochum, Germany
| | - Björn Behr
- Department of Plastic Surgery, Burn Center, Hand Center, Sarcoma Reference Center, BG‑University Hospital Bergmannsheil, D‑44789 Bochum, Germany
| | - Christoph Wallner
- Department of Plastic Surgery, Burn Center, Hand Center, Sarcoma Reference Center, BG‑University Hospital Bergmannsheil, D‑44789 Bochum, Germany
| | - Adrien Daigeler
- Department of Plastic Surgery, Burn Center, Hand Center, Sarcoma Reference Center, BG‑University Hospital Bergmannsheil, D‑44789 Bochum, Germany
| | - Tobias Hirsch
- Department of Plastic Surgery, Burn Center, Hand Center, Sarcoma Reference Center, BG‑University Hospital Bergmannsheil, D‑44789 Bochum, Germany
| | - Frank Jacobsen
- Department of Plastic Surgery, Burn Center, Hand Center, Sarcoma Reference Center, BG‑University Hospital Bergmannsheil, D‑44789 Bochum, Germany
| | - Marcus Renner
- Institute of Pathology, University of Heidelberg, D‑69120 Heidelberg, Germany
| | - Ali Harati
- Department of Neurosurgery, Klinikum Dortmund, D‑44145 Dortmund, Germany
| | - Marcus Lehnhardt
- Department of Plastic Surgery, Burn Center, Hand Center, Sarcoma Reference Center, BG‑University Hospital Bergmannsheil, D‑44789 Bochum, Germany
| | - Mustafa Becerikli
- Department of Plastic Surgery, Burn Center, Hand Center, Sarcoma Reference Center, BG‑University Hospital Bergmannsheil, D‑44789 Bochum, Germany
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16
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Sampath C, Sang S, Ahmedna M. In vitro and in vivo inhibition of aldose reductase and advanced glycation end products by phloretin, epigallocatechin 3-gallate and [6]-gingerol. Biomed Pharmacother 2016; 84:502-513. [PMID: 27685794 DOI: 10.1016/j.biopha.2016.09.073] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 09/06/2016] [Accepted: 09/06/2016] [Indexed: 10/20/2022] Open
Abstract
Hyperglycemic stress activates polyol pathway and aldose reductase (AR) key enzyme responsible for generating secondary complications during diabetes. In this study the therapeutic potential of phloretin, epigallocatechin 3-gallate (EGCG) and [6]-gingerol were evaluated for anti-glycating and AR inhibitory activity in vitro and in vivo systems. Human retinal pigment epithelial (HRPE) cells were induced with high glucose supplemented with the phloretin, EGCG and [6]-gingerol. Aldose reductase activity, total advanced glycation end products (AGEs) and enzyme inhibitor kinetics were assessed. Male C57BL/6J mice were randomly assigned to one of the different treatments (bioactive compounds at 2 concentrations each) with either a low fat diet or high fat diet (HFD). After sixteen weeks, AGE accumulation and AR activity was determined in heart, eyes and kidney. High glucose induced toxicity decreased cell viability compared to the untreated cells and AR activity increased to 2-5 folds from 24 to 96h. Pre-treatment of cells with phloretin, EGCG and [6]-gingerol improved cell viability and inhibited AR activity. The enzyme inhibition kinetics followed a non-competitive mode of inhibition for phloretin and EGCG whereas [6]-gingerol indicated uncompetitive type of inhibition against AR. Data from the animal studies showed high plasma glucose levels in HFD group over time, compared to the low fat diet. HFD group developed cataract and AR activity increased to 4 folds compared to the group with low fat diet. Administration of EGCG, phloretin and [6]-gingerol significantly reduced blood sugar levels, AGEs accumulation, and AR activity. These findings could provide a basis to consider using the selected dietary components alone or in combination with other therapeutic approaches to prevent diabetes-related complications in humans.
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Affiliation(s)
- Chethan Sampath
- Department of Human Nutrition, College of Health Sciences, Qatar University, Doha 2713, Qatar
| | - Shengmin Sang
- Laboratory for Functional Foods and Human Health, Center for Excellence in Post-Harvest Technologies, North Carolina Agricultural and Technical State University, North Carolina Research Campus, 500 Laureate Way, Kannapolis, NC 28081, United States
| | - Mohamed Ahmedna
- Department of Human Nutrition, College of Health Sciences, Qatar University, Doha 2713, Qatar.
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17
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Karamese M, Guvendi B, Karamese SA, Cinar I, Can S, Erol HS, Aydin H, Gelen V, Karakus E. The protective effects of epigallocatechin gallate on lipopolysa ccharide-induced hepatotoxicity: an in vitro study on Hep3B cells. IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES 2016; 19:483-9. [PMID: 27403254 PMCID: PMC4923468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVES In the present study, our aim was to investigate the possible protective effects of epigallocatechin gallate (EGCG) on lipopolysaccharide (LPS)-induced hepatotoxicity by using Hep3B human hepatoma cells. Specifically, the study examines the role of some proinflammatory markers and oxidative damage as possible mechanisms of LPS-associated cytotoxicity. Consequently, the hepatocellular carcinoma cell line Hep3B was chosen as a model for investigation of LPS toxicity and the effect of EGCG on LPS-exposed cells. MATERIALS AND METHODS The Hep3B human hepatoma cells were used for this study. The cytotoxic effects of chemicals (EGCG and LPS), AST and ALT levels, SOD and CAT activities, GSH-Px level and TNF-alpha and IL-6 levels were detected by using different biochemical and molecular methods. LPS and EGCG were applied to cells at various times and doses. RESULTS The highest treatment dose of EGCG (400 µM) led to a dramatic decrease in SOD level and increase in CAT and GSH levels. Additionally, the highest dose of EGCG also led to a dramatic increase in TNF-alpha and IL-6 levels. On the other hand, effective doses of EGCG (200 and 100 µM) normalized all related parameters levels. CONCLUSION LPS caused hepatotoxicity, but interestingly, a high dose of EGCG was found to be a cytotoxic agent in this study. However, other two doses of EGCG led to a decrease in both inflammatory cytokine levels and antioxidant enzyme levels. Further studies should examine the effect of EGCG on secondary cellular signaling pathways.
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Affiliation(s)
- Murat Karamese
- Department of Medical Microbiology, Medical Faculty, Kafkas University, Kars, Turkey,Corresponding author: Murat Karamese. Department of Microbiology, Medical Faculty, Kafkas University, Kars, Turkey; Tel: +905548638853;
| | - Bulent Guvendi
- Department of General Surgery, Medical Faculty, Kafkas University, Kars, Turkey
| | - Selina Aksak Karamese
- Department of Histology and Embryology, Medical Faculty, Kafkas University, Kars, Turkey
| | - Irfan Cinar
- Department of Pharmacology, Medical Faculty, Ataturk University, Erzurum, Turkey
| | - Serpil Can
- Department of Physiology, Medical Faculty, Kafkas University, Kars, Turkey
| | - Huseyin Serkan Erol
- Department of Biochemistry, Veterinary Faculty, Ataturk University, Erzurum, Turkey
| | - Hakan Aydin
- Department of Virology, Veterinary Faculty, Ataturk University, Erzurum, Turkey
| | - Volkan Gelen
- Department of Physiology, Veterinary Faculty, Kafkas University, Kars, Turkey
| | - Emre Karakus
- Department of Pharmacology and Toxicology, Veterinary Faculty, Ataturk University, Erzurum, Turkey
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18
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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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19
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Enzymatic synthesis of polyguaiacol and its thermal antioxidant behavior in polypropylene. Polym Bull (Berl) 2015. [DOI: 10.1007/s00289-015-1551-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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20
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Surface molecularly imprinted polymers for solid-phase extraction of (–)-epigallocatechin gallate from toothpaste. Front Chem Sci Eng 2015. [DOI: 10.1007/s11705-015-1526-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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21
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Amitani M, Amitani H, Sloan RA, Suzuki H, Sameshima N, Asakawa A, Nerome Y, Owaki T, Inui A, Hoshino E. The translational aspect of complementary and alternative medicine for cancer with particular emphasis on Kampo. Front Pharmacol 2015; 6:150. [PMID: 26300773 PMCID: PMC4527580 DOI: 10.3389/fphar.2015.00150] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 07/09/2015] [Indexed: 12/17/2022] Open
Abstract
Complementary and alternative medicine (CAM) including Japanese Kampo is known to have anticancer potential. An increasing number of cancer survivors are using CAM for disease prevention, immune system enhancement, and symptom control. Although there have been abundant previous clinical reports regarding CAM, scientific investigations aimed at acquiring quantifiable results in clinical trials, as well as basic research regarding CAM, have only recently been undertaken. Recent studies suggest that CAM enhancement of immune function is related to cytokines. This review provides a translational aspect of CAM, particularly Hozai in Kampo from both scientific and clinical points of view for further development of CAM for cancer treatment.
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Affiliation(s)
- Marie Amitani
- Education Center for Doctors in Remote Islands and Rural Areas, Kagoshima University Graduate School of Medical and Dental Sciences Kagoshima, Japan ; Department of Psychosomatic Internal Medicine, Kagoshima University Graduate School of Medical and Dental Sciences Kagoshima, Japan
| | - Haruka Amitani
- Department of Psychosomatic Internal Medicine, Kagoshima University Graduate School of Medical and Dental Sciences Kagoshima, Japan
| | - Robert A Sloan
- Department of Psychosomatic Internal Medicine, Kagoshima University Graduate School of Medical and Dental Sciences Kagoshima, Japan
| | - Hajime Suzuki
- Department of Psychosomatic Internal Medicine, Kagoshima University Graduate School of Medical and Dental Sciences Kagoshima, Japan
| | - Nanami Sameshima
- Department of Psychosomatic Internal Medicine, Kagoshima University Graduate School of Medical and Dental Sciences Kagoshima, Japan
| | - Akihiro Asakawa
- Department of Psychosomatic Internal Medicine, Kagoshima University Graduate School of Medical and Dental Sciences Kagoshima, Japan
| | - Yasuhito Nerome
- Education Center for Doctors in Remote Islands and Rural Areas, Kagoshima University Graduate School of Medical and Dental Sciences Kagoshima, Japan
| | - Tetsuhiro Owaki
- Education Center for Doctors in Remote Islands and Rural Areas, Kagoshima University Graduate School of Medical and Dental Sciences Kagoshima, Japan
| | - Akio Inui
- Department of Psychosomatic Internal Medicine, Kagoshima University Graduate School of Medical and Dental Sciences Kagoshima, Japan
| | - Etsuo Hoshino
- Division of Kampo Support, Cancer Institute Hospital Tokyo, Japan
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22
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Green tea polyphenols and their potential role in health and disease. Inflammopharmacology 2015; 23:151-61. [PMID: 26164000 DOI: 10.1007/s10787-015-0236-1] [Citation(s) in RCA: 131] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2015] [Accepted: 06/06/2015] [Indexed: 12/14/2022]
Abstract
There is a growing body of evidence that plant polyphenols such as resveratrol, anthocyanins, catechins, and terpenes like taxol are effectively used in the treatment of chronic conditions including cancer, Alzheimer, Parkinsonism, diabetes, aging, etc. The link between oxidative stress and inflammation is well accepted. Thus, the mechanism of action of these natural products is partly believed to be through their significant antioxidant properties. The main constituent of green tea, with clinical significance, is epigallocatechin gallate (EGCG). It has been associated with antitumor, anti-Alzheimer, and anti-aging properties, improve redox status at the tissue level possibly preventing system level structural damage. This review focuses on EGCG and its potential therapeutic role in health and disease.
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23
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Wang X, Qi W, Li Y, Zhang N, Dong L, Sun M, Cun J, Zhang Y, Lv S, Yang Q. Huaier Extract Induces Autophagic Cell Death by Inhibiting the mTOR/S6K Pathway in Breast Cancer Cells. PLoS One 2015; 10:e0131771. [PMID: 26134510 PMCID: PMC4489895 DOI: 10.1371/journal.pone.0131771] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Accepted: 06/06/2015] [Indexed: 12/29/2022] Open
Abstract
Huaier extract is attracting increased attention due to its biological activities, including antitumor, anti-parasite and immunomodulatory effects. Here, we investigated the role of autophagy in Huaier-induced cytotoxicity in MDA-MB-231, MDA-MB-468 and MCF7 breast cancer cells. Huaier treatment inhibited cell viability in all three cell lines and induced various large membranous vacuoles in the cytoplasm. In addition, electron microscopy, MDC staining, accumulated expression of autophagy markers and flow cytometry revealed that Huaier extract triggered autophagy. Inhibition of autophagy attenuated Huaier-induced cell death. Furthermore, Huaier extract inhibited the mammalian target of the rapamycin (mTOR)/S6K pathway in breast cancer cells. After implanting MDA-MB-231 cells subcutaneously into the right flank of BALB/c nu/nu mice, Huaier extract induced autophagy and effectively inhibited xenograft tumor growth. This study is the first to show that Huaier-induced cytotoxicity is partially mediated through autophagic cell death in breast cancer cells through suppression of the mTOR/S6K pathway.
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Affiliation(s)
- Xiaolong Wang
- Department of Breast Surgery, Qilu Hospital, Shandong University, Jinan, Shandong, P.R. China
| | - Wenwen Qi
- School of Medicine, Shandong University, Jinan, Shandong, P.R. China
| | - Yaming Li
- School of Medicine, Shandong University, Jinan, Shandong, P.R. China
| | - Ning Zhang
- Department of Breast Surgery, Qilu Hospital, Shandong University, Jinan, Shandong, P.R. China
| | - Lun Dong
- Department of Breast Surgery, Qilu Hospital, Shandong University, Jinan, Shandong, P.R. China
| | - Mingjuan Sun
- Department of Breast Surgery, Qilu Hospital, Shandong University, Jinan, Shandong, P.R. China
| | - Jinjing Cun
- Department of Breast Surgery, Qilu Hospital, Shandong University, Jinan, Shandong, P.R. China
| | - Yan Zhang
- Qilu Hospital, Shandong University, Jinan, Shandong, P.R. China
| | - Shangge Lv
- School of Medicine, Shandong University, Jinan, Shandong, P.R. China
| | - Qifeng Yang
- Department of Breast Surgery, Qilu Hospital, Shandong University, Jinan, Shandong, P.R. China
- Department of Pathology Tissue Bank, Qilu Hospital, Shandong University, Jinan, Shandong, P.R. China
- * E-mail:
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24
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Núñez-Sánchez MA, González-Sarrías A, Romo-Vaquero M, García-Villalba R, Selma MV, Tomás-Barberán FA, García-Conesa MT, Espín JC. Dietary phenolics against colorectal cancer--From promising preclinical results to poor translation into clinical trials: Pitfalls and future needs. Mol Nutr Food Res 2015; 59:1274-91. [PMID: 25693744 DOI: 10.1002/mnfr.201400866] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Revised: 02/10/2015] [Accepted: 02/11/2015] [Indexed: 01/09/2023]
Abstract
Colorectal cancer (CRC) remains a major cause of cancer death worldwide. Over 70% of CRC cases are sporadic and related to lifestyle. Epidemiological studies inversely correlate CRC incidence with the intake of fruits and vegetables but not with their phenolic content. Preclinical studies using in vitro (cell lines) and animal models of CRC have reported anticancer effects for dietary phenolics through the regulation of different markers and signaling pathways. Herein, we review and contrast the evidence between preclinical studies and clinical trials (patients with CRC or at risk, familial adenopolyposis or aberrant crypt foci) investigating the protective effects of curcumin, resveratrol, isoflavones, green tea extracts (epigallocatechin gallate), black raspberry powder (anthocyanins and ellagitannins), bilberry extract (anthocyanins), ginger extracts (gingerol derivatives), and pomegranate extracts (ellagitannins and ellagic acid). To date, curcumin is the most promising polyphenol as possible future adjuvant in CRC management. Overall, the clinical evidence of dietary phenolics against CRC is still weak and the amounts needed to exert some effects largely exceed common dietary doses. We discuss here the possible reasons behind the gap between preclinical and clinical research (inconsistence of results, lack of clinical endpoints, etc.), and provide an outlook and a roadmap to approach this topic.
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Affiliation(s)
- María A Núñez-Sánchez
- Research Group on Quality, Safety and Bioactivity of Plant Foods, Department of Food Science and Technology, CEBAS-CSIC, Murcia, Spain
| | - Antonio González-Sarrías
- Research Group on Quality, Safety and Bioactivity of Plant Foods, Department of Food Science and Technology, CEBAS-CSIC, Murcia, Spain
| | - María Romo-Vaquero
- Research Group on Quality, Safety and Bioactivity of Plant Foods, Department of Food Science and Technology, CEBAS-CSIC, Murcia, Spain
| | - Rocío García-Villalba
- Research Group on Quality, Safety and Bioactivity of Plant Foods, Department of Food Science and Technology, CEBAS-CSIC, Murcia, Spain
| | - María V Selma
- Research Group on Quality, Safety and Bioactivity of Plant Foods, Department of Food Science and Technology, CEBAS-CSIC, Murcia, Spain
| | - Francisco A Tomás-Barberán
- Research Group on Quality, Safety and Bioactivity of Plant Foods, Department of Food Science and Technology, CEBAS-CSIC, Murcia, Spain
| | - María-Teresa García-Conesa
- Research Group on Quality, Safety and Bioactivity of Plant Foods, Department of Food Science and Technology, CEBAS-CSIC, Murcia, Spain
| | - Juan Carlos Espín
- Research Group on Quality, Safety and Bioactivity of Plant Foods, Department of Food Science and Technology, CEBAS-CSIC, Murcia, Spain
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25
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Liu Y, Liu Y, Wu X, Zhang J, Pei D, Wei J, Di D. Preparation of organic-inorganic hybrid porous materials and adsorption characteristics for (-)-epigallocatechin gallate and caffeine from the extract of discarded tea. POLYM ENG SCI 2015. [DOI: 10.1002/pen.24130] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yi Liu
- Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province; Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences; Lanzhou 730000 People's Republic of China
- Center of Resource Chemical and New Material; Qingdao, No. 36 Jinshui Road; Qingdao 266100 People's Republic of China
| | - Yongfeng Liu
- Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province; Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences; Lanzhou 730000 People's Republic of China
- Center of Resource Chemical and New Material; Qingdao, No. 36 Jinshui Road; Qingdao 266100 People's Republic of China
| | - Xiaoyu Wu
- Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province; Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences; Lanzhou 730000 People's Republic of China
| | - Junhan Zhang
- Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province; Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences; Lanzhou 730000 People's Republic of China
- Department of Pharmacy; Key Laboratory of Chemistry and Quality for Traditional Chinese Medicines of the College of Gansu Province, Gansu College of Traditional Chinese Medicine; Lanzhou 730000 People's Republic of China
| | - Dong Pei
- Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province; Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences; Lanzhou 730000 People's Republic of China
- Center of Resource Chemical and New Material; Qingdao, No. 36 Jinshui Road; Qingdao 266100 People's Republic of China
| | - Jianteng Wei
- Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province; Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences; Lanzhou 730000 People's Republic of China
- Center of Resource Chemical and New Material; Qingdao, No. 36 Jinshui Road; Qingdao 266100 People's Republic of China
| | - Duolong Di
- Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province; Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences; Lanzhou 730000 People's Republic of China
- Center of Resource Chemical and New Material; Qingdao, No. 36 Jinshui Road; Qingdao 266100 People's Republic of China
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26
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Zhang Y, Wang X, Han L, Zhou Y, Sun S. Green tea polyphenol EGCG reverse cisplatin resistance of A549/DDP cell line through candidate genes demethylation. Biomed Pharmacother 2015; 69:285-90. [DOI: 10.1016/j.biopha.2014.12.016] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2014] [Accepted: 12/10/2014] [Indexed: 01/29/2023] Open
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27
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González-Sarrías A, Tomé-Carneiro J, Bellesia A, Tomás-Barberán FA, Espín JC. The ellagic acid-derived gut microbiota metabolite, urolithin A, potentiates the anticancer effects of 5-fluorouracil chemotherapy on human colon cancer cells. Food Funct 2015; 6:1460-9. [DOI: 10.1039/c5fo00120j] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The ellagic acid-derived gut microbiota metabolite, urolithin A, at concentrations achievable in the human colorectum, enhances the anticancer effects of 5-FU-chemotherapy on three different colon cancer cells.
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Affiliation(s)
- Antonio González-Sarrías
- Research Group on Quality
- Safety and Bioactivity of Plant Foods
- Dept. Food Science and Technology
- CEBAS-CSIC
- Murcia
| | - Joao Tomé-Carneiro
- Research Group on Quality
- Safety and Bioactivity of Plant Foods
- Dept. Food Science and Technology
- CEBAS-CSIC
- Murcia
| | - Andrea Bellesia
- Department of Life Sciences
- University of Modena and Reggio Emilia
- 42122 Reggio Emilia
- Italy
| | - Francisco A. Tomás-Barberán
- Research Group on Quality
- Safety and Bioactivity of Plant Foods
- Dept. Food Science and Technology
- CEBAS-CSIC
- Murcia
| | - Juan Carlos Espín
- Research Group on Quality
- Safety and Bioactivity of Plant Foods
- Dept. Food Science and Technology
- CEBAS-CSIC
- Murcia
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28
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Jiang L, Tao C, He A, He X. Overexpression of miR-126 sensitizes osteosarcoma cells to apoptosis induced by epigallocatechin-3-gallate. World J Surg Oncol 2014; 12:383. [PMID: 25510179 PMCID: PMC4300611 DOI: 10.1186/1477-7819-12-383] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Accepted: 12/03/2014] [Indexed: 01/05/2023] Open
Abstract
Background miR-126 plays an important role in the proliferation, invasion, migration, and chemotherapeutics resistance in cancer. Epigallocatechin-3-gallate (EGCG), as the major polyphenolic constituent present in green tea, is a promising anticancer agent. However, the role of miR-126 in EGCG anticancer remains unclear. Here, we investigated the effects of miR-126 and EGCG on cell viability, apoptosis, cell cycle distribution of osteosarcoma cells and the sensitization of miR-126 on osteosarcoma cells to EGCG. Methods The cell viability, apoptosis and cycle distribution were analyzed using MTT assay and flow cytometry. Results Our results showed that EGCG (0.025, 0.05, 0.1, 0.2 g/L) suppresses proliferation of osteosarcoma MG63 and U2OS cells in a concentration-dependent and time-dependent manner and the inhibitory effects of 0.05 g/L EGCG on U2OS cells were roughly equivalent to 20 μM cisplatin (DDP); miR-126 could promote apoptosis and inhibit proliferation in U2OS cells but without significant effects on cell cycle G1 phase arrest; EGCG suppressed proliferation of U2OS cells through induction of cell cycle G1 arrest and apoptotic death; overexpression of miR-126 enhanced the inhibitory effects of EGCG on proliferation in U2OS cells via promotion of apoptosis. Conclusions Our results demonstrate that enhanced expression of miR-126 increased the sensitivity of osteosarcoma cells to EGCG through induction of apoptosis.
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Affiliation(s)
| | | | | | - Xiaojie He
- Children's Medical Center, The Second Xiangya Hospital, Central South University, No, 139 Middle Renmin Road, Changsha, Hunan 410011, P,R, China.
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Hun Lee J, Shu L, Fuentes F, Su ZY, Tony Kong AN. Cancer chemoprevention by traditional chinese herbal medicine and dietary phytochemicals: targeting nrf2-mediated oxidative stress/anti-inflammatory responses, epigenetics, and cancer stem cells. J Tradit Complement Med 2014; 3:69-79. [PMID: 24716158 PMCID: PMC3924975 DOI: 10.4103/2225-4110.107700] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Excessive oxidative stress induced by reactive oxygen species (ROS), reactive nitrogen species (RNS), and reactive metabolites of carcinogens alters cellular homeostasis, leading to genetic/epigenetic changes, genomic instability, neoplastic transformation, and cancer initiation/progression. As a protective mechanism against oxidative stress, antioxidant/detoxifying enzymes reduce these reactive species and protect normal cells from endo-/exogenous oxidative damage. The transcription factor nuclear factor-erythroid 2 p45 (NF-E2)-related factor 2 (Nrf2), a master regulator of the antioxidative stress response, plays a critical role in the expression of many cytoprotective enzymes, including NAD(P)H:quinine oxidoreductase (NQO1), heme oxygenase-1 (HO-1), UDP-glucuronosyltransferase (UGT), and glutathione S-transferase (GST). Recent studies demonstrated that many dietary phytochemicals derived from various vegetables, fruits, spices, and herbal medicines induce Nrf2-mediated antioxidant/detoxifying enzymes, restore aberrant epigenetic alterations, and eliminate cancer stem cells (CSCs). The Nrf2-mediated antioxidant response prevents many age-related diseases, including cancer. Owing to their fundamental contribution to carcinogenesis, epigenetic modifications and CSCs are novel targets of dietary phytochemicals and traditional Chinese herbal medicine (TCHM). In this review, we summarize cancer chemoprevention by dietary phytochemicals, including TCHM, which have great potential as a safer and more effective strategy for preventing cancer.
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Affiliation(s)
- Jong Hun Lee
- Center for Cancer Prevention Research, Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, the State University of New Jersey, 160 Frelinghuysen Road, Piscataway, NJ 08854, USA
| | - Limin Shu
- Center for Cancer Prevention Research, Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, the State University of New Jersey, 160 Frelinghuysen Road, Piscataway, NJ 08854, USA
| | - Francisco Fuentes
- Center for Cancer Prevention Research, Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, the State University of New Jersey, 160 Frelinghuysen Road, Piscataway, NJ 08854, USA ; Department of Desert Agriculture and Biotechnology, Arturo Prat University, PO box 121, Iquique, Chile
| | - Zheng-Yuan Su
- Center for Cancer Prevention Research, Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, the State University of New Jersey, 160 Frelinghuysen Road, Piscataway, NJ 08854, USA
| | - Ah-Ng Tony Kong
- Center for Cancer Prevention Research, Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, the State University of New Jersey, 160 Frelinghuysen Road, Piscataway, NJ 08854, USA
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30
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López de Dicastillo C, Castro-López MDM, López-Vilariño JM, González-Rodríguez MV. Immobilization of green tea extract on polypropylene films to control the antioxidant activity in food packaging. Food Res Int 2013. [DOI: 10.1016/j.foodres.2013.05.022] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Zhang Q, Yang H, Wang J, Li A, Zhang W, Cui X, Wang K. Effect of green tea on reward learning in healthy individuals: a randomized, double-blind, placebo-controlled pilot study. Nutr J 2013; 12:84. [PMID: 23777561 PMCID: PMC3702504 DOI: 10.1186/1475-2891-12-84] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Accepted: 05/31/2013] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Both clinical and preclinical studies revealed that regular intake of green tea reduced the prevalence of depressive symptoms, as well as produced antidepressant-like effects in rodents. Evidence proposed that disturbed reward learning has been associated with the development of anhedonia, a core symptom of depression. However, the relationship between green tea and reward learning is poorly investigated. Our goal was to test whether chronic treatment with green tea in healthy subjects affects the process of reward learning and subsequently regulates the depressive symptoms. METHODS Seventy-four healthy subjects participated in a double-blind, randomized placebo-controlled study with oral administration of green tea or placebo for 5weeks. We used the monetary incentive delay task to evaluate the reward learning by measurement of the response to reward trial or no-reward trial. We compared the reaction time of reward responsiveness between green tea and placebo treatment. Furthermore, we selected Montgomery-Asberg depression rating scale (MADRS) and 17-item Hamilton Rating Scale for Depression (HRSD-17) to estimate the depressive symptoms in these two groups. RESULTS The results showed chronic treatment of green tea increased reward learning compared with placebo by decreasing the reaction time in monetary incentive delay task. Moreover, participants treated with green tea showed reduced scores measured in MADRS and HRSD-17 compared with participants treated with placebo. CONCLUSIONS Our findings reveal that chronic green tea increased the reward learning and prevented the depressive symptoms. These results also raised the possibility that supplementary administration of green tea might reverse the development of depression through normalization of the reward function.
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Affiliation(s)
- Qiangye Zhang
- Department of Pediatric Surgery, Qilu Hospital, Shandong University, 107 Wenhuaxi Road, Jinan, Shandong 250012, China
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Poornima P, Weng CF, Padma VV. Neferine from Nelumbo nucifera induces autophagy through the inhibition of PI3K/Akt/mTOR pathway and ROS hyper generation in A549 cells. Food Chem 2013; 141:3598-605. [PMID: 23993526 DOI: 10.1016/j.foodchem.2013.05.138] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 05/18/2013] [Accepted: 05/30/2013] [Indexed: 12/19/2022]
Abstract
Previously we have reported that neferine from the medicinal plant Nelumbo nucifera, inhibited cancer cell proliferation by inducing apoptosis. The present study was focused on the action mechanism of neferine in inducing autophagy in lung cancer cells. Neferine markedly inhibited A549 cell proliferation in a dose dependent manner. Acidic vesicular accumulation was observed in neferine treated cells as an indication of autophagy. Neferine could induce the conversion of LC3B-I to LC3B-II without affecting the expression levels of PI3KCIII and Beclin1. It has been observed that neferine mediated autophagy is dependent on inhibition of PI3K/Akt/mTOR signaling by neferine. Neferine treatment could also lead to the ROS hypergeneration and depletion of cellular antioxidant, GSH. The results demonstrate that neferine-induced autophagy is mediated through ROS hypergeneration and mTOR inhibition. Taken together, the present study unveils a novel mechanism of action of neferine on lung cancer cells in the induction of autophagy.
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Affiliation(s)
- Paramasivan Poornima
- Animal Tissue Culture and Molecular Genetics Laboratory, Department of Biotechnology, School of Biotechnology and Genetic Engineering, Bharathiar University, Coimbatore 641046, Tamilnadu, India
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Li C, Han J, Yao Q, Zou C, Xu Y, Zhang C, Shang D, Zhou L, Zou C, Sun Z, Li J, Zhang Y, Yang H, Gao X, Li X. Subpathway-GM: identification of metabolic subpathways via joint power of interesting genes and metabolites and their topologies within pathways. Nucleic Acids Res 2013; 41:e101. [PMID: 23482392 PMCID: PMC3643575 DOI: 10.1093/nar/gkt161] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Various 'omics' technologies, including microarrays and gas chromatography mass spectrometry, can be used to identify hundreds of interesting genes, proteins and metabolites, such as differential genes, proteins and metabolites associated with diseases. Identifying metabolic pathways has become an invaluable aid to understanding the genes and metabolites associated with studying conditions. However, the classical methods used to identify pathways fail to accurately consider joint power of interesting gene/metabolite and the key regions impacted by them within metabolic pathways. In this study, we propose a powerful analytical method referred to as Subpathway-GM for the identification of metabolic subpathways. This provides a more accurate level of pathway analysis by integrating information from genes and metabolites, and their positions and cascade regions within the given pathway. We analyzed two colorectal cancer and one metastatic prostate cancer data sets and demonstrated that Subpathway-GM was able to identify disease-relevant subpathways whose corresponding entire pathways might be ignored using classical entire pathway identification methods. Further analysis indicated that the power of a joint genes/metabolites and subpathway strategy based on their topologies may play a key role in reliably recalling disease-relevant subpathways and finding novel subpathways.
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Affiliation(s)
- Chunquan Li
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin 150081, PR China
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Duan Y, Luo X, Qin Y, Zhang H, Sun G, Sun X, Yan Y. Determination of epigallocatechin-3-gallate with a high-efficiency electrochemical sensor based on a molecularly imprinted poly(o-phenylenediamine) film. J Appl Polym Sci 2013. [DOI: 10.1002/app.39002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Chun KS, Kim EH, Lee S, Hahm KB. Chemoprevention of gastrointestinal cancer: the reality and the dream. Gut Liver 2013; 7:137-49. [PMID: 23560148 PMCID: PMC3607766 DOI: 10.5009/gnl.2013.7.2.137] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Revised: 07/03/2012] [Accepted: 09/17/2012] [Indexed: 12/17/2022] Open
Abstract
Despite substantial progress in screening, early diagnosis, and the development of noninvasive technology, gastrointestinal (GI) cancer remains a major cause of cancer-associated mortality. Chemoprevention is thought to be a realistic approach for reducing the global burden of GI cancer, and efforts have been made to search for chemopreventive agents that suppress acid reflux, GI inflammation and the eradication of Helicobacter pylori. Thus, proton pump inhibitors, statins, monoclonal antibodies targeting tumor necrosis factor-alpha, and nonsteroidal anti-inflammatory agents have been investigated for their potential to prevent GI cancer. Besides the development of these synthetic agents, a wide variety of the natural products present in a plant-based diet, which are commonly called phytoceuticals, have also sparked hope for the chemoprevention of GI cancer. To perform successful searches of chemopreventive agents for GI cancer, it is of the utmost importance to understand the factors contributing to GI carcinogenesis. Emerging evidence has highlighted the role of chronic inflammation in inducing genomic instability and telomere shortening and affecting polyamine metabolism and DNA repair, which may help in the search for new chemopreventive agents for GI cancer.
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Alotaibi A, Bhatnagar P, Najafzadeh M, Gupta KC, Anderson D. Tea phenols in bulk and nanoparticle form modify DNA damage in human lymphocytes from colon cancer patients and healthy individuals treated in vitro with platinum-based chemotherapeutic drugs. Nanomedicine (Lond) 2012; 8:389-401. [PMID: 22943128 DOI: 10.2217/nnm.12.126] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Tea catechin epigallocatechin-3-gallate (EGCG) and other polyphenols, such as theaflavins (TFs), are increasingly proving useful as chemopreventives in a number of human cancers. They can also affect normal cells. The polyphenols in tea are known to have antioxidant properties that can quench free radical species, and pro-oxidant activities that appear to be responsible for the induction of apoptosis in tumor cells. The bioavailability of these natural compounds is an important factor that determines their efficacy. Nanoparticle (NP)-mediated delivery techniques of EGCG and TFs have been found to improve their bioavailability to a level that could benefit their effectiveness as chemopreventives. AIM The present study was conducted to compare the effects of TFs and EGCG, when used in the bulk form and in the polymer (poly[lactic-co-glycolic acid])-based NP form, in oxaliplatin- and satraplatin-treated lymphocytes as surrogate cells from colorectal cancer patients and healthy volunteers. MATERIALS & METHODS NPs were examined for their size distribution, surface morphology, entrapment efficiency and release profile. Lymphocytes were treated in the Comet assay with oxaliplatin and satraplatin, washed and treated with bulk or NP forms of tea phenols, washed and then treated with hydrogen peroxide to determine single-strand breaks after crosslinking. RESULTS The results of DNA damage measurements by the Comet assay revealed opposite trends in bulk and NP forms of TFs, as well as EGCG. Both the compounds in the bulk form produced statistically significant concentration-dependent reductions in DNA damage in oxaliplatin- or satraplatin-treated lymphocytes. In contrast, when used in the NP form both TFs and EGCG, although initially causing a reduction, produced a concentration-dependent statistically significant increase in DNA damage in the lymphocytes. DISCUSSION These observations support the notion that TFs and EGCG act as both antioxidants and pro-oxidants, depending on the form in which they are administered under the conditions of investigation.
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Affiliation(s)
- Amal Alotaibi
- Division of Medical Sciences, University of Bradford, Richmond Road, Bradford, West Yorkshire, BD7 1DP, UK
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Vodnar DC, Socaciu C. Green tea increases the survival yield of Bifidobacteria in simulated gastrointestinal environment and during refrigerated conditions. Chem Cent J 2012; 6:61. [PMID: 22727242 PMCID: PMC3408365 DOI: 10.1186/1752-153x-6-61] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2012] [Accepted: 06/22/2012] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The well-known prebiotics are carbohydrates but their effects may not always be beneficial, as they can also encourage the growth of non-probiotic bacteria such as Eubacterium biforme and Clostridium perfringens. Therefore, new alternatives such as non-carbohydrate sources to stimulate the growth of probiotics are needed. The aim of this work was to evaluate (I) the green tea polyphenols by HPLC-LC/MS and (II) the protective effect of green tea extract on viability and stability of B. infantis ATCC 15697 and B. breve ATCC 15700 microencapsulated in chitosan coated alginate microcapsules during exposure to simulated gastrointestinal conditions and refrigerated storage. RESULTS The major compound identified by HPLC-LC/MS in green tea was epigallocatechin gallate followed by caffeine and epigallocatechin. The survival yield of probiotic bacteria in microcapsules with 10% GT during storage at 4°C, demonstrated significantly (P < 0.05) higher number of survival bacteria. Microencapsulated B.infantis and B. breve with 5% and 10% GT showed a significantly (P < 0.05) improved survival under simulated gastric conditions (pH 2.0, 2 h) and bile solution (3%, 2 h) when they were compared with microencapsulation without GT addition. CONCLUSIONS The results of this study suggest that green tea coencapsulated with B. infantis or B. breve exert a protective effect of bacteria during exposure to gastrointestinal conditions and refrigerated storage. For a health perspective, the results confirm the growing interest probiotic bacteria and the perceived benefit of increasing their numbers in the gastrointestinal tract by microencapsulation.
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Affiliation(s)
- Dan C Vodnar
- Food Science and Technology Department, Unit of Chemistry and Biochemistry, University of Agricultural Sciences and Veterinary Medicine, 3-5 Mănăştur str, Cluj-Napoca, 400372, România
| | - Carmen Socaciu
- Food Science and Technology Department, Unit of Chemistry and Biochemistry, University of Agricultural Sciences and Veterinary Medicine, 3-5 Mănăştur str, Cluj-Napoca, 400372, România
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Zhao Y, Chen L, Yakubov G, Aminiafshar T, Han L, Lian G. Experimental and theoretical studies on the binding of epigallocatechin gallate to purified porcine gastric mucin. J Phys Chem B 2012; 116:13010-6. [PMID: 22506496 DOI: 10.1021/jp212059x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Binding of epigallocatechin gallate (EGCG) to highly purified short side-chain porcine gastric mucin similar to human MUC6 type has been studied by ultraviolet-visible absorption spectroscopy (UV-vis), ultrafiltration isothermal titration microcalorimetry (ITC) and transmission electron microscopy (TEM). The thermodynamic equilibrium of EGCG binding to mucin has been quantitatively determined using ultrafiltration and high-performance liquid chromatography (HPLC)-UV/vis. The relationship suggests multilayer binding rather than simple Langmuir monolayer binding of EGCG. By combining the ultrafiltration and ITC data, the thermodynamic parameters of EGCG binding to mucin have been obtained. The binding constant for the first layer is about an order of magnitude higher than that of the consecutive multilayers. Negative entropy indicates multilayer of EGCG formed. Hydrogen bonding may be responsible for the multilayer formation. Increasing temperature resulted in a decrease in the binding affinity, further suggesting that hydrogen bonds dominated the interaction energy. A TEM micrograph of the EGCG-mucin complex revealed a monodispersion of blobs similar to pure mucin solution but with relatively bigger size (about twice). It is proposed that the EGCG-mucin binding process occurs by single and/or cluster of EGCG molecules driven to the surface of the two hydrophobic globules of mucin by hydrophobic interaction followed by hydrogen bond interaction between EGCG and mucin. Further adsorption of EGCG molecules onto bound EGCG molecules to form multilayers can also occur. This fits well with the observations that EGCG-mucin interaction followed a multilayer adsorption isotherm, the energy released is dominated by hydrogen bonds, and no large aggregates were formed.
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Affiliation(s)
- Yanyan Zhao
- China Agricultural University, Qing-hua-dong-lu, Beijing, P R China
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Baek M, Lee JA, Choi SJ. Toxicological effects of a cationic clay, montmorillonite in vitro and in vivo. Mol Cell Toxicol 2012. [DOI: 10.1007/s13273-012-0012-x] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Liu Y, Bai Q, Lou S, Di D, Li J, Guo M. Adsorption characteristics of (-)-epigallocatechin gallate and caffeine in the extract of waste tea on macroporous adsorption resins functionalized with chloromethyl, amino, and phenylamino groups. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:1555-1566. [PMID: 22243478 DOI: 10.1021/jf204710h] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
According to the Friedel-Crafts and amination reaction, a series of macroporous adsorption resins (MARs) with novel structures were synthesized and identified by the Brunauer-Emmett-Teller (BET) method and Fourier transform infrared (FTIR) spectra, and corresponding adsorption behaviors for (-)-epigallocatechin gallate (EGCG) and caffeine (CAF) extracted from waste tea were systemically investigated. Based on evaluation of adsorption kinetics, the kinetic data were well fitted by pseudo-second-order kinetics. Langmuir, Freundlich, Temkin-Pyzhev, and Dubinin-Radushkevich isotherms were selected to illustrate the adsorption process of EGCG and CAF on the MARs. Thermodynamic parameters were adopted to explain in-depth information of inherent energetic changes associated with the adsorption process. The effect of temperature on EGCG and CAF adsorption by D101-3 was further expounded. Van der Waals force, hydrogen bonding, and electrostatic interaction were the main driving forces for the adsorption of EGCG and CAF on the MARs. This study might provide a scientific reference point to aid the industrial large-scale separation and enrichment of EGCG from the extracts of waste tea using modified MARs.
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Affiliation(s)
- Yongfeng Liu
- Key Laboratory of Chemistry of Northwestern Plant Resources, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, No. 18, Tianshui Middle Road, Lanzhou 730000, China
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Zhu WL, Shi HS, Wei YM, Wang SJ, Sun CY, Ding ZB, Lu L. Green tea polyphenols produce antidepressant-like effects in adult mice. Pharmacol Res 2012; 65:74-80. [DOI: 10.1016/j.phrs.2011.09.007] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2011] [Revised: 09/15/2011] [Accepted: 09/18/2011] [Indexed: 01/13/2023]
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Yu CC, Chiang PC, Lu PH, Kuo MT, Wen WC, Chen P, Guh JH. Antroquinonol, a natural ubiquinone derivative, induces a cross talk between apoptosis, autophagy and senescence in human pancreatic carcinoma cells. J Nutr Biochem 2011; 23:900-7. [PMID: 21840189 DOI: 10.1016/j.jnutbio.2011.04.015] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2011] [Accepted: 04/20/2011] [Indexed: 01/21/2023]
Abstract
Pancreatic cancer is a malignant neoplasm of the pancreas. A mutation and constitutive activation of K-ras occurs in more than 90% of pancreatic adenocarcinomas. A successful approach for the treatment of pancreatic cancers is urgent. Antroquinonol, a ubiquinone derivative isolated from a camphor tree mushroom, Antrodia camphorata, induced a concentration-dependent inhibition of cell proliferation in pancreatic cancer PANC-1 and AsPC-1 cells. Flow cytometric analysis of DNA content by propidium iodide staining showed that antroquinonol induced G1 arrest of the cell cycle and a subsequent apoptosis. Antroquinonol inhibited Akt phosphorylation at Ser(473), the phosphorylation site critical for Akt kinase activity, and blocked the mammalian target of rapamycin (mTOR) phosphorylation at Ser(2448), a site dependent on mTOR activity. Several signals responsible for mTOR/p70S6K/4E-BP1 signaling cascades have also been examined to validate the pathway. Moreover, antroquinonol induced the down-regulation of several cell cycle regulators and mitochondrial antiapoptotic proteins. In contrast, the expressions of K-ras and its phosphorylation were significantly increased. The coimmunoprecipitation assay showed that the association of K-ras and Bcl-xL was dramatically augmented, which was indicative of apoptotic cell death. Antroquinonol also induced the cross talk between apoptosis, autophagic cell death and accelerated senescence, which was, at least partly, explained by the up-regulation of p21(Waf1/Cip1) and K-ras. In summary, the data suggest that antroquinonol induces anticancer activity in human pancreatic cancers through an inhibitory effect on PI3-kinase/Akt/mTOR pathways that in turn down-regulates cell cycle regulators. The translational inhibition causes G1 arrest of the cell cycle and an ultimate mitochondria-dependent apoptosis. Moreover, autophagic cell death and accelerated senescence also explain antroquinonol-mediated anticancer effect.
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Affiliation(s)
- Chia-Chun Yu
- School of Pharmacy, National Taiwan University, Taipei 100, Taiwan
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Lou Z, Er C, Li J, Wang H, Zhu S, Sun J. Removal of caffeine from green tea by microwave-enhanced vacuum ice water extraction. Anal Chim Acta 2011; 716:49-53. [PMID: 22284877 DOI: 10.1016/j.aca.2011.07.038] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2011] [Revised: 07/06/2011] [Accepted: 07/21/2011] [Indexed: 11/25/2022]
Abstract
In order to selectively remove caffeine from green tea, a microwave-enhanced vacuum ice water extraction (MVIE) method was proposed. The effects of MVIE variables including extraction time, microwave power, and solvent to solid radio on the removal yield of caffeine and the loss of total phenolics (TP) from green tea were investigated. The optimized conditions were as follows: solvent (mL) to solid (g) ratio was 10:1, microwave extraction time was 6 min, microwave power was 350 W and 2.5 h of vacuum ice water extraction. The removal yield of caffeine by MVIE was 87.6%, which was significantly higher than that by hot water extraction, indicating a significant improvement of removal efficiency. Moreover, the loss of TP of green tea in the proposed method was much lower than that in the hot water extraction. After decaffeination by MVIE, the removal yield of TP tea was 36.2%, and the content of TP in green tea was still higher than 170 mg g(-1). Therefore, the proposed microwave-enhanced vacuum ice water extraction was selective, more efficient for the removal of caffeine. The main phenolic compounds of green tea were also determined, and the results indicated that the contents of several catechins were almost not changed in MVIE. This study suggests that MVIE is a new and good alternative for the removal of caffeine from green tea, with a great potential for industrial application.
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Affiliation(s)
- Zaixiang Lou
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Lihu Road, Wuxi, PR China.
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Lopez de Dicastillo C, Nerin C, Alfaro P, Catala R, Gavara R, Hernandez-Munoz P. Development of new antioxidant active packaging films based on ethylene vinyl alcohol copolymer (EVOH) and green tea extract. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:7832-7840. [PMID: 21682295 DOI: 10.1021/jf201246g] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Ethylene vinyl alcohol copolymer (EVOH) films containing green tea extract were successfully produced by extrusion. The films were brown and translucent, and the addition of the extract increased the water and oxygen barrier at low relative humidity but increased the water sensitivity, the glass transition temperature, and the crystallinity of the films and improved their thermal resistance. An analysis by HPLC revealed that the antioxidant components of the extract suffered partial degradation during extrusion, reducing the content of catechin gallates and increasing the concentration of free gallic acid. Exposure of the films to various food simulants showed that the liquid simulants increased their capacity to reduce DPPH(•) and ABTS(•+) radicals. The release of green tea extract components into the simulant monitored by HPLC showed that all compounds present in the green tea extract were partially released, although the extent and kinetics of release were dependent on the type of food. In aqueous food simulants, gallic acid was the main antioxidant component released with partition coefficient values ca. 200. In 95% ethanol (fatty food simulant) the K value for gallic acid decreased to 8 and there was a substantial contribution of catechins (K in the 1000 range) to a greatly increased antioxidant efficiency. Kinetically, gallic acid was released more quickly than catechins, owing to its faster diffusivity in the polymer matrix as a consequence of its smaller molecular size, although the most relevant effect is the plasticization of the matrix by alcohol, increasing the diffusion coefficient >10-fold. Therefore, the materials here developed with the combination of antioxidant substances that constitute the green tea extract could be used in the design of antioxidant active packaging for all type of foods, from aqueous to fatty products, the compounds responsible for the protection being those with the higher compatibility with the packaged product.
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