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Miyake K, Tanaka M, Yokoyama S, Rui L, Koida A, Kozai H, Okamoto T. Degranulation of RBL-2H3 rat basophilic leukemia cells is synergistically inhibited by combined treatment with nobiletin and lactoferrin. Cytotechnology 2024; 76:341-349. [PMID: 38736731 PMCID: PMC11082116 DOI: 10.1007/s10616-024-00625-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 02/21/2024] [Indexed: 05/14/2024] Open
Abstract
The aim of this study was to elucidate the anti-allergic effects of polymethoxyflavonoids in combination with milk proteins and the mechanism of inhibition. Three polymethoxyflavonoids and two milk proteins were exposed to the rat basophilic leukemia cell line RBL-2H3. β-hexosaminidase was used as an indicator of degranulation inhibition. The mechanism of inhibition was examined by measuring intracellular Ca2+ levels and western blot method. In the degranulation inhibition test with polymethoxyflavonoids and milk proteins alone, nobiletin was the strongest inhibitor in the polymethoxyflavonoid group and lactoferrin in the milk protein group. Next, co-stimulation with nobiletin and lactoferrin showed stronger synergistic degranulation inhibition than treatment with nobiletin or lactoferrin alone. Western blot analysis showed that co-stimulation with nobiletin and lactoferrin significantly downregulated the induction of phospholipase Cγ 1 phosphorylation. The degranulation response in RBL-2H3 cells was synergistically suppressed by co-stimulation of nobiletin and lactoferrin acting on both Ca2+-dependent and Ca2+-independent pathways.
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Affiliation(s)
- Kaho Miyake
- Graduate School of Bioscience and Biotechnology, Chubu University, 1200 Matsumoto-cho, Kasugai-shi, Aichi 487-8501 Japan
| | - Mamoru Tanaka
- Graduate School of Bioscience and Biotechnology, Chubu University, 1200 Matsumoto-cho, Kasugai-shi, Aichi 487-8501 Japan
| | - Sayaka Yokoyama
- Department of Food and Nutritional Environment, Kinjo Gakuin University, Nagoya, Aichi Japan
| | - Lu Rui
- Graduate School of Bioscience and Biotechnology, Chubu University, 1200 Matsumoto-cho, Kasugai-shi, Aichi 487-8501 Japan
| | - Ayaka Koida
- Faculty of Health and Medical Sciences, Aichi Shukutoku University, Nagakute, Aichi Japan
| | - Hana Kozai
- Graduate School of Bioscience and Biotechnology, Chubu University, 1200 Matsumoto-cho, Kasugai-shi, Aichi 487-8501 Japan
| | - Takeaki Okamoto
- Faculty of Education, Ehime University, Matsuyama, Ehime Japan
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2
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Sahadevan R, Binoy A, Shajan I, Sadhukhan S. Mitochondria-targeting EGCG derivatives protect H9c2 cardiomyocytes from H 2O 2-induced apoptosis: design, synthesis and biological evaluation. RSC Adv 2023; 13:29477-29488. [PMID: 37818277 PMCID: PMC10561634 DOI: 10.1039/d3ra04527g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 10/02/2023] [Indexed: 10/12/2023] Open
Abstract
Pathologies related to cardiovascular diseases mostly emerge as a result of oxidative stress buildup in cardiomyocytes. The heavy load of mitochondrial oxidative phosphorylation in cardiac tissues corresponds to a surge in oxidative stress leading to mitochondrial dysfunction and cellular apoptosis. Thus, scavenging the reactive oxygen species (ROS) linked to mitochondria can significantly improve cardio-protection. Epigallocatechin-3-gallate (EGCG), the major polyphenol found in green tea has been extensively studied for its profound health-beneficial activities. Herein, we designed and synthesized a series of mitochondrial-targeting EGCG derivatives, namely MitoEGCGn (n = 4, 6, 8) by incorporating triphenylphosphonium ion onto it using different linkers. MitoEGCGn were found to be non-toxic to H9c2 rat cardiomyocyte cells even at higher doses in comparison to its parent molecule EGCG. Interestingly, MitoEGCG4 and MitoEGCG6 protected the H9c2 cardiomyocyte cells from the oxidative damage induced by H2O2 whereas EGCG was found to be toxic and ineffective in protecting the cells from H2O2 damage. MitoEGCG4 and MitoEGCG6 also protected the cells from the H2O2-induced disruption of mitochondrial membrane potential as well as activation of apoptosis as revealed by pro-caspase 3 expression profile, DNA fragmentation assay, and AO/EtBr staining. Taken together, our study shows that the mitochondria targeting EGCG derivatives were able to effectively combat the H2O2-induced oxidative stress in H9c2 cardiomyocytes. They eventually augmented the mitochondrial health of cardiomyocytes by maintaining the mitochondrial function and attenuating apoptosis. Overall, MitoEGCG4 and MitoEGCG6 could provision a cardioprotective role to H9c2 cardiomyocytes at the time of oxidative insults related to mitochondrial dysfunction-associated injuries.
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Affiliation(s)
- Revathy Sahadevan
- Department of Chemistry, Indian Institute of Technology Palakkad Kerala 678 623 India
| | - Anupama Binoy
- Department of Chemistry, Indian Institute of Technology Palakkad Kerala 678 623 India
| | - Irene Shajan
- Department of Chemistry, Indian Institute of Technology Palakkad Kerala 678 623 India
| | - Sushabhan Sadhukhan
- Department of Chemistry, Indian Institute of Technology Palakkad Kerala 678 623 India
- Physical & Chemical Biology Laboratory, Department of Biological Sciences & Engineering, Indian Institute of Technology Palakkad Kerala 678 623 India
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3
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Qiu S, Zorig A, Sato N, Yanagihara A, Kanazawa T, Takasugi M, Arai H. Effect of Polyphenols in Sea Buckthorn Berry on Chemical Mediator Release from Mast Cells. Prev Nutr Food Sci 2023; 28:335-346. [PMID: 37842252 PMCID: PMC10567591 DOI: 10.3746/pnf.2023.28.3.335] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 05/23/2023] [Accepted: 06/01/2023] [Indexed: 10/17/2023] Open
Abstract
Sea buckthorn (Hippophae rhamnoides L.) is a deciduous shrub of the Elaeagnaceae family and is widely distributed in northern Eurasia. Sea buckthorn berry (SBB) has attracted attention for its use in many health foods, although its physiological function remains unknown. In this study, we investigated the inhibitory effect of SBB extract and its fractions on Type-I allergy using mast cell lines. Among these fractions, SBB fraction with the highest amount of antioxidant polyphenols significantly inhibited the release of chemical mediators such as histamine and leukotriene B4 (LTB4) from the stimulated mast cells. This fraction also inhibited the influx of calcium ions (Ca2+) and the phosphorylation of tyrosine residues in proteins, including spleen tyrosine kinase, which is associated with signal transduction during the release of chemical mediators. The active SBB fraction contained isorhamnetin as its major flavonol aglycon. Isorhamnetin inhibited histamine and LTB4 release from the stimulated cells and suppressed intracellular Ca2+ influx. These results indicate that isorhamnetin is the primary substance responsible for the antiallergic activity in SBB. In conclusion, SBB may alleviate Type-I allergy by inhibiting the release of chemical mediators from mast cells, and polyphenols may contribute to this effect.
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Affiliation(s)
- Shiman Qiu
- School of Regional Innovation and Social Design Engineering, Kitami Institute of Technology, Kitami 090-8507, Japan
| | - Anuu Zorig
- School of Regional Innovation and Social Design Engineering, Kitami Institute of Technology, Kitami 090-8507, Japan
| | - Naoko Sato
- School of Regional Innovation and Social Design Engineering, Kitami Institute of Technology, Kitami 090-8507, Japan
| | - Ai Yanagihara
- School of Regional Innovation and Social Design Engineering, Kitami Institute of Technology, Kitami 090-8507, Japan
| | - Tsutomu Kanazawa
- School of Regional Innovation and Social Design Engineering, Kitami Institute of Technology, Kitami 090-8507, Japan
| | - Mikako Takasugi
- Department of Life Science, Kyushu Sangyo University, Fukuoka 813-8503, Japan
| | - Hirofumi Arai
- School of Regional Innovation and Social Design Engineering, Kitami Institute of Technology, Kitami 090-8507, Japan
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4
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Wise SK, Damask C, Roland LT, Ebert C, Levy JM, Lin S, Luong A, Rodriguez K, Sedaghat AR, Toskala E, Villwock J, Abdullah B, Akdis C, Alt JA, Ansotegui IJ, Azar A, Baroody F, Benninger MS, Bernstein J, Brook C, Campbell R, Casale T, Chaaban MR, Chew FT, Chambliss J, Cianferoni A, Custovic A, Davis EM, DelGaudio JM, Ellis AK, Flanagan C, Fokkens WJ, Franzese C, Greenhawt M, Gill A, Halderman A, Hohlfeld JM, Incorvaia C, Joe SA, Joshi S, Kuruvilla ME, Kim J, Klein AM, Krouse HJ, Kuan EC, Lang D, Larenas-Linnemann D, Laury AM, Lechner M, Lee SE, Lee VS, Loftus P, Marcus S, Marzouk H, Mattos J, McCoul E, Melen E, Mims JW, Mullol J, Nayak JV, Oppenheimer J, Orlandi RR, Phillips K, Platt M, Ramanathan M, Raymond M, Rhee CS, Reitsma S, Ryan M, Sastre J, Schlosser RJ, Schuman TA, Shaker MS, Sheikh A, Smith KA, Soyka MB, Takashima M, Tang M, Tantilipikorn P, Taw MB, Tversky J, Tyler MA, Veling MC, Wallace D, Wang DY, White A, Zhang L. International consensus statement on allergy and rhinology: Allergic rhinitis - 2023. Int Forum Allergy Rhinol 2023; 13:293-859. [PMID: 36878860 DOI: 10.1002/alr.23090] [Citation(s) in RCA: 72] [Impact Index Per Article: 72.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 11/11/2022] [Accepted: 09/13/2022] [Indexed: 03/08/2023]
Abstract
BACKGROUND In the 5 years that have passed since the publication of the 2018 International Consensus Statement on Allergy and Rhinology: Allergic Rhinitis (ICAR-Allergic Rhinitis 2018), the literature has expanded substantially. The ICAR-Allergic Rhinitis 2023 update presents 144 individual topics on allergic rhinitis (AR), expanded by over 40 topics from the 2018 document. Originally presented topics from 2018 have also been reviewed and updated. The executive summary highlights key evidence-based findings and recommendation from the full document. METHODS ICAR-Allergic Rhinitis 2023 employed established evidence-based review with recommendation (EBRR) methodology to individually evaluate each topic. Stepwise iterative peer review and consensus was performed for each topic. The final document was then collated and includes the results of this work. RESULTS ICAR-Allergic Rhinitis 2023 includes 10 major content areas and 144 individual topics related to AR. For a substantial proportion of topics included, an aggregate grade of evidence is presented, which is determined by collating the levels of evidence for each available study identified in the literature. For topics in which a diagnostic or therapeutic intervention is considered, a recommendation summary is presented, which considers the aggregate grade of evidence, benefit, harm, and cost. CONCLUSION The ICAR-Allergic Rhinitis 2023 update provides a comprehensive evaluation of AR and the currently available evidence. It is this evidence that contributes to our current knowledge base and recommendations for patient evaluation and treatment.
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Affiliation(s)
- Sarah K Wise
- Otolaryngology-HNS, Emory University, Atlanta, Georgia, USA
| | - Cecelia Damask
- Otolaryngology-HNS, Private Practice, University of Central Florida, Lake Mary, Florida, USA
| | - Lauren T Roland
- Otolaryngology-HNS, Washington University, St. Louis, Missouri, USA
| | - Charles Ebert
- Otolaryngology-HNS, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Joshua M Levy
- Otolaryngology-HNS, Emory University, Atlanta, Georgia, USA
| | - Sandra Lin
- Otolaryngology-HNS, University of Wisconsin, Madison, Wisconsin, USA
| | - Amber Luong
- Otolaryngology-HNS, McGovern Medical School of the University of Texas, Houston, Texas, USA
| | - Kenneth Rodriguez
- Otolaryngology-HNS, University Hospitals Cleveland Medical Center, Cleveland, Ohio, USA
| | - Ahmad R Sedaghat
- Otolaryngology-HNS, University of Cincinnati, Cincinnati, Ohio, USA
| | - Elina Toskala
- Otolaryngology-HNS, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | | | - Baharudin Abdullah
- Otolaryngology-HNS, Universiti Sains Malaysia, Kubang, Kerian, Kelantan, Malaysia
| | - Cezmi Akdis
- Immunology, Infectious Diseases, Swiss Institute of Allergy and Asthma Research, Davos, Switzerland
| | - Jeremiah A Alt
- Otolaryngology-HNS, University of Utah, Salt Lake City, Utah, USA
| | | | - Antoine Azar
- Allergy/Immunology, Johns Hopkins University, Baltimore, Maryland, USA
| | - Fuad Baroody
- Otolaryngology-HNS, University of Chicago, Chicago, Illinois, USA
| | | | | | - Christopher Brook
- Otolaryngology-HNS, Harvard University, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
| | - Raewyn Campbell
- Otolaryngology-HNS, Macquarie University, Sydney, NSW, Australia
| | - Thomas Casale
- Allergy/Immunology, University of South Florida College of Medicine, Tampa, Florida, USA
| | - Mohamad R Chaaban
- Otolaryngology-HNS, Cleveland Clinic, Case Western Reserve University, Cleveland, Ohio, USA
| | - Fook Tim Chew
- Allergy/Immunology, Genetics, National University of Singapore, Singapore, Singapore
| | - Jeffrey Chambliss
- Allergy/Immunology, University of Texas Southwestern, Dallas, Texas, USA
| | - Antonella Cianferoni
- Allergy/Immunology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | | | | | | | - Anne K Ellis
- Allergy/Immunology, Queens University, Kingston, ON, Canada
| | | | - Wytske J Fokkens
- Otorhinolaryngology, Amsterdam University Medical Centres, Amsterdam, Netherlands
| | | | - Matthew Greenhawt
- Allergy/Immunology, Pediatrics, University of Colorado, Children's Hospital Colorado, Aurora, Colorado, USA
| | - Amarbir Gill
- Otolaryngology-HNS, University of Michigan, Ann Arbor, Michigan, USA
| | - Ashleigh Halderman
- Otolaryngology-HNS, University of Texas Southwestern, Dallas, Texas, USA
| | - Jens M Hohlfeld
- Respiratory Medicine, Fraunhofer Institute for Toxicology and Experimental Medicine ITEM, Hannover Medical School, German Center for Lung Research, Hannover, Germany
| | | | - Stephanie A Joe
- Otolaryngology-HNS, University of Illinois Chicago, Chicago, Illinois, USA
| | - Shyam Joshi
- Allergy/Immunology, Oregon Health and Science University, Portland, Oregon, USA
| | | | - Jean Kim
- Otolaryngology-HNS, Johns Hopkins University, Baltimore, Maryland, USA
| | - Adam M Klein
- Otolaryngology-HNS, Emory University, Atlanta, Georgia, USA
| | - Helene J Krouse
- Otorhinolaryngology Nursing, University of Texas Rio Grande Valley, Edinburg, Texas, USA
| | - Edward C Kuan
- Otolaryngology-HNS, University of California Irvine, Orange, California, USA
| | - David Lang
- Allergy/Immunology, Cleveland Clinic, Cleveland, Ohio, USA
| | | | | | - Matt Lechner
- Otolaryngology-HNS, University College London, Barts Health NHS Trust, London, UK
| | - Stella E Lee
- Otolaryngology-HNS, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Victoria S Lee
- Otolaryngology-HNS, University of Illinois Chicago, Chicago, Illinois, USA
| | - Patricia Loftus
- Otolaryngology-HNS, University of California San Francisco, San Francisco, California, USA
| | - Sonya Marcus
- Otolaryngology-HNS, Stony Brook University, Stony Brook, New York, USA
| | - Haidy Marzouk
- Otolaryngology-HNS, State University of New York Upstate, Syracuse, New York, USA
| | - Jose Mattos
- Otolaryngology-HNS, University of Virginia, Charlottesville, Virginia, USA
| | - Edward McCoul
- Otolaryngology-HNS, Ochsner Clinic, New Orleans, Louisiana, USA
| | - Erik Melen
- Pediatric Allergy, Karolinska Institutet, Stockholm, Sweden
| | - James W Mims
- Otolaryngology-HNS, Wake Forest University, Winston Salem, North Carolina, USA
| | - Joaquim Mullol
- Otorhinolaryngology, Hospital Clinic Barcelona, Barcelona, Spain
| | - Jayakar V Nayak
- Otolaryngology-HNS, Stanford University, Palo Alto, California, USA
| | - John Oppenheimer
- Allergy/Immunology, Rutgers, State University of New Jersey, Newark, New Jersey, USA
| | | | - Katie Phillips
- Otolaryngology-HNS, University of Cincinnati, Cincinnati, Ohio, USA
| | - Michael Platt
- Otolaryngology-HNS, Boston University, Boston, Massachusetts, USA
| | | | | | - Chae-Seo Rhee
- Rhinology/Allergy, Seoul National University Hospital and College of Medicine, Seoul, Korea
| | - Sietze Reitsma
- Otolaryngology-HNS, University of Amsterdam, Amsterdam, Netherlands
| | - Matthew Ryan
- Otolaryngology-HNS, University of Texas Southwestern, Dallas, Texas, USA
| | - Joaquin Sastre
- Allergy, Fundacion Jiminez Diaz, University Autonoma de Madrid, Madrid, Spain
| | - Rodney J Schlosser
- Otolaryngology-HNS, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Theodore A Schuman
- Otolaryngology-HNS, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Marcus S Shaker
- Allergy/Immunology, Dartmouth Geisel School of Medicine, Lebanon, New Hampshire, USA
| | - Aziz Sheikh
- Primary Care, University of Edinburgh, Edinburgh, Scotland
| | - Kristine A Smith
- Otolaryngology-HNS, University of Utah, Salt Lake City, Utah, USA
| | - Michael B Soyka
- Otolaryngology-HNS, University of Zurich, University Hospital of Zurich, Zurich, Switzerland
| | - Masayoshi Takashima
- Otolaryngology-HNS, Houston Methodist Academic Institute, Houston, Texas, USA
| | - Monica Tang
- Allergy/Immunology, University of California San Francisco, San Francisco, California, USA
| | | | - Malcolm B Taw
- Integrative East-West Medicine, University of California Los Angeles, Westlake Village, California, USA
| | - Jody Tversky
- Allergy/Immunology, Johns Hopkins University, Baltimore, Maryland, USA
| | - Matthew A Tyler
- Otolaryngology-HNS, University of Minnesota, Minneapolis, Minnesota, USA
| | - Maria C Veling
- Otolaryngology-HNS, University of Texas Southwestern, Dallas, Texas, USA
| | - Dana Wallace
- Allergy/Immunology, Nova Southeastern University, Ft. Lauderdale, Florida, USA
| | - De Yun Wang
- Otolaryngology-HNS, National University of Singapore, Singapore, Singapore
| | - Andrew White
- Allergy/Immunology, Scripps Clinic, San Diego, California, USA
| | - Luo Zhang
- Otolaryngology-HNS, Beijing Tongren Hospital, Beijing, China
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Nagata K, Araumi S, Ando D, Ito N, Ando M, Ikeda Y, Takahashi M, Noguchi S, Yasuda Y, Nakano N, Ando T, Hara M, Yashiro T, Hachisu M, Nishiyama C. Kaempferol Suppresses the Activation of Mast Cells by Modulating the Expression of FcεRI and SHIP1. Int J Mol Sci 2023; 24:ijms24065997. [PMID: 36983066 PMCID: PMC10059252 DOI: 10.3390/ijms24065997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 03/20/2023] [Indexed: 03/30/2023] Open
Abstract
In the present study, we evaluated the effects of kaempferol on bone marrow-derived mast cells (BMMCs). Kaempferol treatment significantly and dose-dependently inhibited IgE-induced degranulation, and cytokine production of BMMCs under the condition that cell viability was maintained. Kaempferol downregulated the surface expression levels of FcεRI on BMMCs, but the mRNA levels of FcεRIα, β, and γ-chains were not changed by kaempferol treatment. Furthermore, the kaempferol-mediated downregulation of surface FcεRI on BMMCs was still observed when protein synthesis or protein transporter was inhibited. We also found that kaempferol inhibited both LPS- and IL-33-induced IL-6 production from BMMCs, without affecting the expression levels of their receptors, TLR4 and ST2. Although kaempferol treatment increased the protein amount of NF-E2-related factor 2 (NRF2)-a master transcription factor of antioxidant stress-in BMMCs, the inhibition of NRF2 did not alter the suppressive effect of kaempferol on degranulation. Finally, we found that kaempferol treatment increased the levels of mRNA and protein of a phosphatase SHIP1 in BMMCs. The kaempferol-induced upregulation of SHIP1 was also observed in peritoneal MCs. The knockdown of SHIP1 by siRNA significantly enhanced IgE-induced degranulation of BMMCs. A Western blotting analysis showed that IgE-induced phosphorylation of PLCγ was suppressed in kaempferol-treated BMMCs. These results indicate that kaempferol inhibited the IgE-induced activation of BMMCs by downregulating FcεRI and upregulating SHIP1, and the SHIP1 increase is involved in the suppression of various signaling-mediated stimulations of BMMCs, such as those associated with TLR4 and ST2.
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Affiliation(s)
- Kazuki Nagata
- Department of Biological Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
| | - Sanae Araumi
- Department of Biological Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
| | - Daisuke Ando
- Department of Biological Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
| | - Naoto Ito
- Department of Biological Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
| | - Miki Ando
- Department of Biological Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
| | - Yuki Ikeda
- Department of Biological Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
| | - Miki Takahashi
- Department of Biological Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
| | - Sakura Noguchi
- Department of Biological Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
| | - Yayoi Yasuda
- Department of Biological Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
| | - Nobuhiro Nakano
- Atopy (Allergy) Research Center, Juntendo University Graduate School of Medicine, 2-1-1 Hongo Bunkyo-ku, Tokyo 113-8421, Japan
| | - Tomoaki Ando
- Atopy (Allergy) Research Center, Juntendo University Graduate School of Medicine, 2-1-1 Hongo Bunkyo-ku, Tokyo 113-8421, Japan
| | - Mutsuko Hara
- Atopy (Allergy) Research Center, Juntendo University Graduate School of Medicine, 2-1-1 Hongo Bunkyo-ku, Tokyo 113-8421, Japan
| | - Takuya Yashiro
- Department of Biological Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
| | - Masakazu Hachisu
- Department of Biological Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
| | - Chiharu Nishiyama
- Department of Biological Science and Technology, Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
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6
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Sahadevan R, Binoy A, Vechalapu SK, Nanjan P, Sadhukhan S. In situ global proteomics profiling of EGCG targets using a cell-permeable and Click-able bioorthogonal probe. Int J Biol Macromol 2023; 237:123991. [PMID: 36907293 DOI: 10.1016/j.ijbiomac.2023.123991] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 03/01/2023] [Accepted: 03/05/2023] [Indexed: 03/12/2023]
Abstract
Despite possessing a wide spectrum of biological activities, molecular targets of EGCG remain elusive and as a result, its precise mode of action is still unknown. Herein, we have developed a novel cell-permeable and Click-able bioorthogonal probe for EGCG, YnEGCG for in situ detection and identification of its interacting proteins. The strategic structural modification on YnEGCG allowed it to retain innate biological activities of EGCG (IC50 59.52 ± 1.14 μM and 9.07 ± 0.01 μM for cell viability and radical scavenging activity, respectively). Chemoproteomics profiling identified 160 direct EGCG targets, with H:L ratio ≥ 1.10 from the list of 207 proteins, including multiple new proteins that were previously unknown. The targets were broadly distributed in various subcellular compartments suggesting a polypharmacological mode of action of EGCG. GO analysis revealed that the primary targets belonged to the enzymes that regulate key metabolic processes including glycolysis and energy homeostasis, also the cytoplasm (36 %) and mitochondria (15.6 %) contain the majority of EGCG targets. Further, we validated that EGCG interactome was closely associated with apoptosis indicating its role in inducing toxicity in cancer cells. For the first time, this in situ chemoproteomics approach could identify a direct and specific EGCG interactome under physiological conditions in an unbiased manner.
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Affiliation(s)
- Revathy Sahadevan
- Department of Chemistry, Indian Institute of Technology Palakkad, Kerala, India
| | - Anupama Binoy
- Department of Chemistry, Indian Institute of Technology Palakkad, Kerala, India
| | - Sai K Vechalapu
- Department of Chemistry, Indian Institute of Technology Kanpur, Uttar Pradesh, India
| | - Pandurangan Nanjan
- Department of Chemistry, Indian Institute of Technology Palakkad, Kerala, India
| | - Sushabhan Sadhukhan
- Department of Chemistry, Indian Institute of Technology Palakkad, Kerala, India; Physical & Chemical Biology Laboratory, Indian Institute of Technology Palakkad, Kerala, India; Department of Biological Sciences & Engineering, Indian Institute of Technology Palakkad, Kerala, India.
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7
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Fujimura Y, Yoshimoto T, Fujino K, Nezu A, Marugame Y, Bae J, Kumazoe M, Tachibana H. Bioactivity-boosting strategy based on combination of anti-allergic O-methylated catechin with a Citrus flavanone, hesperetin. J Nat Med 2023; 77:363-369. [PMID: 36494586 DOI: 10.1007/s11418-022-01668-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 11/30/2022] [Indexed: 12/13/2022]
Abstract
Many patients with allergies have anxiety about taking anti-allergic medicines due to their side effects and increased medical expenses. Thus, developing functional foods/agricultural products for allergy prevention is strongly desired. In this study, we revealed that a Citrus flavanone, hesperetin, amplified IgE/antigen-mediated degranulation-inhibitory potency of anti-allergic catechin, (-)-epigallocatechin-3-O-(3-O-methyl) gallate (EGCG3''Me), in the rat basophilic/mast cell line RBL-2H3. Hesperetin also significantly elevated the activation of acid sphingomyelinase (ASM), essential for eliciting anti-allergic effect of EGCG3''Me through the cell surficial protein, 67-kDa laminin receptor (67LR). Furthermore, oral administration of the highly absorbent hesperidin, α-glucosyl hesperidin, also enhanced the inhibitory potency of EGCG3''Me-rich 'Benifuuki' green tea (Camellia sinensis L.) on passive cutaneous anaphylaxis (PCA) reaction evoked by IgE/antigen in BALB/c mice. These observations indicate that hesperetin amplifies the ability of EGCG3''Me to inhibit the IgE/antigen-mediated degranulation through activating ASM signaling.
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Affiliation(s)
- Yoshinori Fujimura
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, 744 Motooka, Nishi-Ku, Fukuoka, 819-0395, Japan
| | - Takanori Yoshimoto
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, 744 Motooka, Nishi-Ku, Fukuoka, 819-0395, Japan
| | - Konatsu Fujino
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, 744 Motooka, Nishi-Ku, Fukuoka, 819-0395, Japan
| | - Ayaka Nezu
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, 744 Motooka, Nishi-Ku, Fukuoka, 819-0395, Japan
| | - Yuki Marugame
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, 744 Motooka, Nishi-Ku, Fukuoka, 819-0395, Japan
| | - Jaehoon Bae
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, 744 Motooka, Nishi-Ku, Fukuoka, 819-0395, Japan
| | - Motofumi Kumazoe
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, 744 Motooka, Nishi-Ku, Fukuoka, 819-0395, Japan
| | - Hirofumi Tachibana
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, 744 Motooka, Nishi-Ku, Fukuoka, 819-0395, Japan.
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8
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Fujimura Y, Kumazoe M, Tachibana H. 67-kDa Laminin Receptor-Mediated Cellular Sensing System of Green Tea Polyphenol EGCG and Functional Food Pairing. Molecules 2022; 27:molecules27165130. [PMID: 36014370 PMCID: PMC9416087 DOI: 10.3390/molecules27165130] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 08/07/2022] [Accepted: 08/10/2022] [Indexed: 11/16/2022] Open
Abstract
The body is equipped with a “food factor-sensing system” that senses food factors, such as polyphenols, sulfur-containing compounds, and vitamins, taken into the body, and plays an essential role in manifesting their physiological effects. For example, (–)-epigallocatechin-3-O-gallate (EGCG), the representative catechin in green tea (Camellia sinensi L.), exerts various effects, including anti-cancer, anti-inflammatory, and anti-allergic effects, when sensed by the cell surficial protein 67-kDa laminin receptor (67LR). Here, we focus on three representative effects of EGCG and provide their specific signaling mechanisms, the 67LR-mediated EGCG-sensing systems. Various components present in foods, such as eriodictyol, hesperetin, sulfide, vitamin A, and fatty acids, have been found to act on the food factor-sensing system and affect the functionality of other foods/food factors, such as green tea extract, EGCG, or its O-methylated derivative at different experimental levels, i.e., in vitro, animal models, and/or clinical trials. These phenomena are observed by increasing or decreasing the activity or expression of EGCG-sensing-related molecules. Such functional interaction between food factors is called “functional food pairing”. In this review, we introduce examples of functional food pairings using EGCG.
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Ashikari T, Hachisu M, Nagata K, Ando D, Iizuka Y, Ito N, Ito K, Ikeda Y, Matsubara H, Yashiro T, Kasakura K, Nishiyama C. Salicylaldehyde Suppresses IgE-Mediated Activation of Mast Cells and Ameliorates Anaphylaxis in Mice. Int J Mol Sci 2022; 23:ijms23158826. [PMID: 35955959 PMCID: PMC9368859 DOI: 10.3390/ijms23158826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 08/05/2022] [Accepted: 08/05/2022] [Indexed: 11/16/2022] Open
Abstract
Mast cells (MCs) play key roles in IgE-mediated immunoresponses, including in the protection against parasitic infections and the onset and/or symptoms of allergic diseases. IgE-mediated activation induces MCs to release mediators, including histamine and leukotriene, as an early response, and to produce cytokines as a late phase response. Attempts have been made to identify novel antiallergic compounds from natural materials such as Chinese medicines and food ingredients. We herein screened approximately 60 compounds and identified salicylaldehyde, an aromatic aldehyde isolated from plant essential oils, as an inhibitor of the IgE-mediated activation of MCs. A degranulation assay, flow cytometric analyses, and enzyme-linked immunosorbent assays revealed that salicylaldehyde inhibited the IgE-mediated degranulation and cytokine expression of bone-marrow-derived MCs (BMMCs). The salicylaldehyde treatment reduced the surface expression level of FcεRI, the high affinity receptor for IgE, on BMMCs, and suppressed the IgE-induced phosphorylation of tyrosine residues in intercellular proteins, possibly Lyn, Syk, and Fyn, in BMMCs. We also examined the effects of salicylaldehyde in vivo using passive anaphylaxis mouse models and found that salicylaldehyde administration significantly enhanced the recovery of a reduced body temperature due to systemic anaphylaxis and markedly suppressed ear swelling, footpad swelling, and vascular permeability in cutaneous anaphylaxis.
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10
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Singh S, Sahadevan R, Roy R, Biswas M, Ghosh P, Kar P, Sonawane A, Sadhukhan S. Structure-based design and synthesis of a novel long-chain 4''-alkyl ether derivative of EGCG as potent EGFR inhibitor: in vitro and in silico studies. RSC Adv 2022; 12:17821-17836. [PMID: 35765335 PMCID: PMC9201511 DOI: 10.1039/d2ra01919a] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Accepted: 06/07/2022] [Indexed: 11/27/2022] Open
Abstract
Herein, we report the discovery of a novel long-chain ether derivative of (−)-epigallocatechin-3-gallate (EGCG), a major green tea polyphenol as a potent EGFR inhibitor. A series of 4′′-alkyl EGCG derivatives have been synthesized via regio-selectively alkylating the 4′′ hydroxyl group in the D-ring of EGCG and tested for their antiproliferative activities against high (A431), moderate (HeLa), and low (MCF-7) EGFR-expressing cancer cell lines. The most potent compound, 4′′-C14 EGCG showed the lowest IC50 values across all the tested cell lines. 4′′-C14 EGCG was also found to be significantly more stable than EGCG under physiological conditions (PBS at pH 7.4). Further western blot analysis and imaging data revealed that 4′′-C14 EGCG induced cell death in A431 cells with shrunken nuclei, nuclear fragmentation, membrane blebbing, and increased population of apoptotic cells where BAX upregulation and BCLXL downregulation were observed. In addition, autophosphorylation of EGFR and its downstream signalling proteins Akt and ERK were markedly inhibited by 4′′-C14 EGCG. MD simulation and the MM/PBSA analysis disclosed the binding mode of 4′′-C14 EGCG in the ATP-binding site of EGFR kinase domain. Taken together, our findings demonstrate that 4′′-C14 EGCG can act as a promising potent EGFR inhibitor with enhanced stability. Among the synthesized 4′′-alkyl EGCG derivatives, 4′′-C14 EGCG inhibited EGF stimulated phosphorylation of EGFR and its downstream signaling pathways, ERK and Akt. 4′′-C14 EGCG showed significantly improved stability than EGCG and induced apoptosis.![]()
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Affiliation(s)
- Satyam Singh
- Department of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore Madhya Pradesh 453 552 India
| | - Revathy Sahadevan
- Department of Chemistry, Indian Institute of Technology Palakkad Kerala 678 623 India
| | - Rajarshi Roy
- Department of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore Madhya Pradesh 453 552 India
| | - Mainak Biswas
- School of Biotechnology, KIIT Deemed to be University Bhubaneswar Orissa 751 024 India
| | - Priya Ghosh
- Department of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore Madhya Pradesh 453 552 India
| | - Parimal Kar
- Department of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore Madhya Pradesh 453 552 India
| | - Avinash Sonawane
- Department of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore Madhya Pradesh 453 552 India
| | - Sushabhan Sadhukhan
- Department of Chemistry, Indian Institute of Technology Palakkad Kerala 678 623 India .,Physical & Chemical Biology Laboratory, Indian Institute of Technology Palakkad Kerala 678 623 India.,Department of Biological Sciences & Engineering, Indian Institute of Technology Palakkad Kerala 678 623 India
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11
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Fujimura Y, Fujino K, Yoshimoto T, Nezu A, Marugame Y, Bae J, Kumazoe M, Tachibana H. Eriodictyol-Amplified 67-kDa Laminin Receptor Signaling Potentiates the Antiallergic Effect of O-Methylated Catechin. JOURNAL OF NATURAL PRODUCTS 2021; 84:1823-1830. [PMID: 34106718 DOI: 10.1021/acs.jnatprod.1c00337] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
(-)-Epigallocatechin-3-O-(3-O-methyl) gallate (1, EGCG3″Me), an antiallergic O-methylated catechin, is present in high quantities in the green tea cultivar "Benifuuki" (Camellia sinensis L.). Previous studies have shown that EGCG3″Me inhibited basophil degranulation mediated through the cell-surface 67-kDa laminin receptor (67LR), but the mechanisms are not fully elucidated. This study aimed to investigate the mechanisms underlying the inhibitory effect of EGCG3″Me on IgE/antigen (Ag)-mediated degranulation and the combined effect of EGCG3″Me with eriodictyol (2), a bioactive flavanone. EGCG3″Me inhibited β-hexosaminidase release from the rat basophilic/mast cell line RBL-2H3 stimulated by IgE/Ag and induced acid sphingomyelinase (ASM) activity. This induction was inhibited by anti-67LR antibody treatment. The ASM-specific inhibitor desipramine inhibited EGCG3″Me-induced suppression of degranulation. The soluble guanylate cyclase (sGC) inhibitor NS2028 weakened the potency of EGCG3″Me, and the sGC activator BAY41-2272 suppressed degranulation. The ability of EGCG3″Me to induce ASM activity and inhibit degranulation was amplified by eriodictyol. Furthermore, oral administration of the lemon-peel-derived eriodyctiol-7-O-glucoside (3) potentiated the suppressive effect of EGCG3″Me-rich "Benifuuki" green tea on the IgE/Ag-induced passive cutaneous anaphylaxis (PCA) reaction in BALB/c mice. These results suggest that EGCG3″Me inhibits IgE/Ag-mediated degranulation by inducing the 67LR/sGC/ASM signaling pathway, and eriodictyol amplifies this signaling.
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Affiliation(s)
- Yoshinori Fujimura
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Konatsu Fujino
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Takanori Yoshimoto
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Ayaka Nezu
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Yuki Marugame
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Jaehoon Bae
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Motofumi Kumazoe
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
| | - Hirofumi Tachibana
- Division of Applied Biological Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
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12
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Li QS, Wang YQ, Liang YR, Lu JL. The anti-allergic potential of tea: a review of its components, mechanisms and risks. Food Funct 2020; 12:57-69. [PMID: 33241826 DOI: 10.1039/d0fo02091e] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Allergy is an immune-mediated disease with increasing prevalence worldwide. Regular treatment with glucocorticoids and antihistamine drugs for allergy patients is palliative rather than permanent. Daily use of dietary anti-allergic natural products is a superior way to prevent allergy and alleviate the threat. Tea, as a health-promoting beverage, has multiple compounds with immunomodulatory ability. Persuasive evidence has shown the anti-allergic ability of tea against asthma, food allergy, atopic dermatitis and anaphylaxis. Recent advances in potential anti-allergic ability of tea and anti-allergic compounds in tea have been reviewed in this paper. Tea exerts its anti-allergic effect mainly by reducing IgE and histamine levels, decreasing FcεRI expression, regulating the balance of Th1/Th2/Th17/Treg cells and inhibiting related transcription factors. Further research perspectives are also discussed.
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Affiliation(s)
- Qing-Sheng Li
- Tea Research Institute, Zhejiang University, China. and Institute of Sericulture and Tea, Zhejiang Academy of Agricultural Sciences, China
| | - Ying-Qi Wang
- Tea Research Institute, Zhejiang University, China.
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13
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Baiyacha, a wild tea plant naturally occurring high contents of theacrine and 3″-methyl-epigallocatechin gallate from Fujian, China. Sci Rep 2020; 10:9715. [PMID: 32546720 PMCID: PMC7297968 DOI: 10.1038/s41598-020-66808-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Accepted: 05/27/2020] [Indexed: 02/05/2023] Open
Abstract
Baiyacha (BYC) is a kind of wild tea plant growing and utilizing in the remote mountain area of Fujian province, Southeastern China. However, scientific studies on this plant remain limited. Our results showed that BYC exhibits the typical morphological characteristics of Camellia gymnogyna Chang, a closely related species of C. sinensis (L.) O. Kuntze, which was not found in Fujian before. Chemical profiling revealed that parts of BYC plants are rich in purine alkaloids and catechins, especially featuring high levels of theacrine and 3″-methyl-epigallocatechin gallate (EGCG3″Me), chemical compounds with multiple biological activities that are rarely observed in regular tea plants. The contents of EGCG3″Me and theacrine in BYC both increased with the leaf maturity of tea shoots, whereas the caffeine content decreased significantly. The obtained results provide abundant information about the morphology and chemical compounds of BYC and may be used for tea production, breeding, and scientific research in the future.
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14
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Ogita T, Yamamoto Y, Mikami A, Shigemori S, Sato T, Shimosato T. Oral Administration of Flavonifractor plautii Strongly Suppresses Th2 Immune Responses in Mice. Front Immunol 2020; 11:379. [PMID: 32184789 PMCID: PMC7058663 DOI: 10.3389/fimmu.2020.00379] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Accepted: 02/17/2020] [Indexed: 12/11/2022] Open
Abstract
The bacterium Flavonifractor plautii (FP), which is found in human feces, has been reported to participate in catechin metabolism in the gut, but this bacterium's effects on immune function are unclear. We assessed the effect of oral administration of FP on the immune response in ovalbumin (OVA) -sensitized mice. We demonstrated that the FP treatment suppressed interleukin (IL)-4 in splenocytes and OVA-specific IgE production in serum from OVA-sensitized mice. Moreover, oral administration of FP augmented CD4+CD25+ T cells and CD103+CD11c+ DCs. In animals of the FP group, the proportion of FP was increased in the mesenteric lymph nodes (MLNs), as was the proportion of Deferribacteres in the cecum. Oral administration of FP may inhibit the Th2 immune response by incorporation into the MLNs and/or by inducing changes in the gut microbiota. Thus, FP may be useful in alleviating antigen-induced Th2 immune responses.
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Affiliation(s)
- Tasuku Ogita
- Department of Biomolecular Innovation, Institute for Biomedical Sciences, Shinshu University, Nagano, Japan
| | - Yoshinari Yamamoto
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan
| | - Ayane Mikami
- Department of Biomedical Engineering, Graduate School of Science and Technology, Shinshu University, Nagano, Japan
| | - Suguru Shigemori
- Department of Biomolecular Innovation, Institute for Biomedical Sciences, Shinshu University, Nagano, Japan
| | - Takashi Sato
- Department of Biomolecular Innovation, Institute for Biomedical Sciences, Shinshu University, Nagano, Japan
| | - Takeshi Shimosato
- Department of Biomolecular Innovation, Institute for Biomedical Sciences, Shinshu University, Nagano, Japan
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15
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Abe T. Fig ( Ficus carica L.) leaf tea suppresses allergy by acceleration disassembly of IgE-receptor complexes. Biosci Biotechnol Biochem 2020; 84:1013-1022. [PMID: 31987005 DOI: 10.1080/09168451.2020.1722608] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
In this study, I investigated the allergy suppressive effect of tea made from fig (Ficus carica L.) leaves. In the rat basophil cell line RBL-2H3, degranulation was significantly suppressed by treatment with fig tea at the same time as addition of IgE antibodies (sensitization). IgE bound to the cell surface was liberated in the medium depending on the treatment time with fig tea. Therefore, it was suggested that the mechanism of action of fig tea is promotion of dissociation of IgE from FcεRI receptors. Such a mechanism is novel in food materials. On oral administration to mice, fig tea showed an inhibitory effect on allergic dermatitis. Furthermore, in tests using an atopic dermatitis model in NC/Nga mice, continued administration of fig tea suppressed symptom exacerbation after antigen administration.Abbreviations: AD: atopic dermatitis; β-Hex: β-hexosaminidase; FCM: flow cytometory; OA: oral administration; TA: transdermal administration.
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Affiliation(s)
- Tatsuya Abe
- Toyo Institute of Food Technology, Kawanishi, Japan
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16
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Hoshino T, Yamashita SI, Suzuki N, Baba A, Ogawa S, Izumi T. Impact of Acacia bark extract tablets on the skin of healthy humans: a randomized, double-blind, placebo-controlled study. Biosci Biotechnol Biochem 2019; 83:538-550. [DOI: 10.1080/09168451.2018.1547626] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
ABSTRACT
This study investigated the effects of proanthocyanidins derived from Acacia (Acacia mearnsii) bark extract in healthy Japanese adult subjects experiencing uncomfortable skin symptoms. All subjects were randomly allocated into two groups (n = 33 each) using a computerized random-number generator. The subjects received either Acacia bark extract tablets or placebo for 8 weeks. Evaluations included water content in the stratum corneum, transepidermal water loss (TEWL), Skindex-16, dermatology life quality index (DLQI), visual analog scale for desire to scratch, and blood tests. At 4 weeks, the symptom/feeling score of DLQI, subjective symptoms related to uncomfortable skin, and the desire to scratch were significantly reduced in the intervention group than in the placebo group. At 8 weeks, the intervention group exhibited significantly lower TEWL on facial skin than that in the placebo group. In conclusion, the intake of Acacia bark extract tablets reduced TEWL and improved dry and uncomfortable skin.
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Affiliation(s)
| | | | - Naoko Suzuki
- R&D Department, ORTHOMEDICO Inc., Bunkyo-ku, Tokyo, Japan
| | - Asami Baba
- R&D Department, ORTHOMEDICO Inc., Bunkyo-ku, Tokyo, Japan
| | - Sosuke Ogawa
- Research & Development Division, Mimozax Co., Ltd., Hatsukaichi-city Hiroshima, Japan
| | - Tatsuya Izumi
- Department of dermatology, Hiroo Dermatology Clinic & Mentors Inc., Shibuya-ku, Tokyo, Japan
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17
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Yamazaki T, Inui M, Hiemori K, Tomono S, Itoh M, Ichimonji I, Nakashima A, Takagi H, Biswas M, Izawa K, Kitaura J, Imai T, Sugiura N, Tateno H, Akashi-Takamura S. Receptor-destroying enzyme (RDE) from Vibrio cholerae modulates IgE activity and reduces the initiation of anaphylaxis. J Biol Chem 2019; 294:6659-6669. [PMID: 30833330 DOI: 10.1074/jbc.ra118.006375] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 02/20/2019] [Indexed: 12/24/2022] Open
Abstract
IgE plays a key role in allergies by binding to allergens and then sensitizing mast cells through the Fc receptor, resulting in the secretion of proinflammatory mediators. Therefore, IgE is a major target for managing allergies. Previous studies have reported that oligomannose on IgE can be a potential target to inhibit allergic responses. However, enzymes that can modulate IgE activity are not yet known. Here, we found that the commercial receptor-destroying enzyme (RDE) (II) from Vibrio cholerae culture fluid specifically modulates IgE, but not IgG, and prevents the initiation of anaphylaxis. RDE (II)-treated IgE cannot access its binding site on bone marrow-derived mast cells, resulting in reduced release of histamine and cytokines. We also noted that RDE (II)-treated IgE could not induce passive cutaneous anaphylaxis in mouse ears. Taken together, we concluded that RDE (II) modulates the IgE structure and renders it unable to mediate allergic responses. To reveal the mechanism by which RDE (II) interferes with IgE activity, we performed lectin microarray analysis to unravel the relationship between IgE modulation and glycosylation. We observed that RDE (II) treatment significantly reduced the binding of IgE to Lycopersicon esculentum lectin, which recognizes poly-N-acetylglucosamine and poly-N-acetyllactosamine. These results suggest that RDE (II) specifically modulates branched glycans on IgE, thereby interfering with its ability to induce allergic responses. Our findings may provide a basis for the development of drugs to inhibit IgE activity in allergies.
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Affiliation(s)
- Tatsuya Yamazaki
- From the Department of Microbiology and Immunology, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi 480-1195
| | - Masanori Inui
- From the Department of Microbiology and Immunology, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi 480-1195
| | - Keiko Hiemori
- the Biotechnology Research Institute for Drug Discovery, National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568
| | - Susumu Tomono
- From the Department of Microbiology and Immunology, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi 480-1195
| | - Makoto Itoh
- From the Department of Microbiology and Immunology, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi 480-1195
| | - Isao Ichimonji
- From the Department of Microbiology and Immunology, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi 480-1195
| | - Akina Nakashima
- From the Department of Microbiology and Immunology, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi 480-1195
| | - Hidekazu Takagi
- From the Department of Microbiology and Immunology, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi 480-1195
| | - Mrityunjoy Biswas
- From the Department of Microbiology and Immunology, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi 480-1195
| | - Kumi Izawa
- the Atopy Research Center, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421.,the Division of Cellular Therapy/Division of Stem Cell Signaling, Institute of Medical Science, University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639
| | - Jiro Kitaura
- the Atopy Research Center, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421.,the Division of Cellular Therapy/Division of Stem Cell Signaling, Institute of Medical Science, University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639
| | - Teruko Imai
- the Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-Honmachi, Kumamoto 862-0973, and
| | - Nobuo Sugiura
- From the Department of Microbiology and Immunology, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi 480-1195
| | - Hiroaki Tateno
- the Biotechnology Research Institute for Drug Discovery, National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568
| | - Sachiko Akashi-Takamura
- From the Department of Microbiology and Immunology, Aichi Medical University School of Medicine, 1-1 Yazakokarimata, Nagakute, Aichi 480-1195,
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18
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Pessato TB, de Carvalho NC, de Figueiredo D, Colomeu TC, Fernandes LGR, Netto FM, de L. Zollner R. Complexation of whey protein with caffeic acid or (−)-epigallocatechin-3-gallate as a strategy to induce oral tolerance to whey allergenic proteins. Int Immunopharmacol 2019; 68:115-123. [DOI: 10.1016/j.intimp.2018.12.047] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Revised: 12/19/2018] [Accepted: 12/20/2018] [Indexed: 01/02/2023]
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19
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Nakano E, Kamei D, Murase R, Taki I, Karasawa K, Fukuhara K, Iwai S. Anti-inflammatory effects of new catechin derivatives in a hapten-induced mouse contact dermatitis model. Eur J Pharmacol 2019; 845:40-47. [DOI: 10.1016/j.ejphar.2018.12.036] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 12/14/2018] [Accepted: 12/20/2018] [Indexed: 10/27/2022]
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20
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Ravishankar D, Salamah M, Akimbaev A, Williams HF, Albadawi DAI, Vaiyapuri R, Greco F, Osborn HMI, Vaiyapuri S. Impact of specific functional groups in flavonoids on the modulation of platelet activation. Sci Rep 2018; 8:9528. [PMID: 29934595 PMCID: PMC6015034 DOI: 10.1038/s41598-018-27809-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 06/05/2018] [Indexed: 01/01/2023] Open
Abstract
Flavonoids exert innumerable beneficial effects on cardiovascular health including the reduction of platelet activation, and thereby, thrombosis. Hence, flavonoids are deemed to be a molecular template for the design of novel therapeutic agents for various diseases including thrombotic conditions. However, the structure-activity relationships of flavonoids with platelets is not fully understood. Therefore, this study aims to advance the current knowledge on structure-activity relationships of flavonoids through a systematic analysis of structurally-related flavones. Here, we investigated a panel of 16 synthetic flavones containing hydroxy or methoxy groups at C-7,8 positions on the A-ring, with a phenyl group or its bioisosteres as the B-ring, along with their thio analogues possessing a sulfur molecule at the 4th carbon position of the C-ring. The antiplatelet efficacies of these compounds were analysed using human isolated platelets upon activation with cross-linked collagen-related peptide by optical aggregometry. The results demonstrate that the hydroxyl groups in flavonoids are important for optimum platelet inhibitory activities. In addition, the 4-C=O and B ring phenyl groups are less critical for the antiplatelet activity of these flavonoids. This structure-activity relationship of flavonoids with the modulation of platelet function may guide the design, optimisation and development of flavonoid scaffolds as antiplatelet agents.
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Wise SK, Lin SY, Toskala E, Orlandi RR, Akdis CA, Alt JA, Azar A, Baroody FM, Bachert C, Canonica GW, Chacko T, Cingi C, Ciprandi G, Corey J, Cox LS, Creticos PS, Custovic A, Damask C, DeConde A, DelGaudio JM, Ebert CS, Eloy JA, Flanagan CE, Fokkens WJ, Franzese C, Gosepath J, Halderman A, Hamilton RG, Hoffman HJ, Hohlfeld JM, Houser SM, Hwang PH, Incorvaia C, Jarvis D, Khalid AN, Kilpeläinen M, Kingdom TT, Krouse H, Larenas-Linnemann D, Laury AM, Lee SE, Levy JM, Luong AU, Marple BF, McCoul ED, McMains KC, Melén E, Mims JW, Moscato G, Mullol J, Nelson HS, Patadia M, Pawankar R, Pfaar O, Platt MP, Reisacher W, Rondón C, Rudmik L, Ryan M, Sastre J, Schlosser RJ, Settipane RA, Sharma HP, Sheikh A, Smith TL, Tantilipikorn P, Tversky JR, Veling MC, Wang DY, Westman M, Wickman M, Zacharek M. International Consensus Statement on Allergy and Rhinology: Allergic Rhinitis. Int Forum Allergy Rhinol 2018; 8:108-352. [PMID: 29438602 PMCID: PMC7286723 DOI: 10.1002/alr.22073] [Citation(s) in RCA: 217] [Impact Index Per Article: 36.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 12/01/2017] [Accepted: 12/01/2017] [Indexed: 02/06/2023]
Abstract
BACKGROUND Critical examination of the quality and validity of available allergic rhinitis (AR) literature is necessary to improve understanding and to appropriately translate this knowledge to clinical care of the AR patient. To evaluate the existing AR literature, international multidisciplinary experts with an interest in AR have produced the International Consensus statement on Allergy and Rhinology: Allergic Rhinitis (ICAR:AR). METHODS Using previously described methodology, specific topics were developed relating to AR. Each topic was assigned a literature review, evidence-based review (EBR), or evidence-based review with recommendations (EBRR) format as dictated by available evidence and purpose within the ICAR:AR document. Following iterative reviews of each topic, the ICAR:AR document was synthesized and reviewed by all authors for consensus. RESULTS The ICAR:AR document addresses over 100 individual topics related to AR, including diagnosis, pathophysiology, epidemiology, disease burden, risk factors for the development of AR, allergy testing modalities, treatment, and other conditions/comorbidities associated with AR. CONCLUSION This critical review of the AR literature has identified several strengths; providers can be confident that treatment decisions are supported by rigorous studies. However, there are also substantial gaps in the AR literature. These knowledge gaps should be viewed as opportunities for improvement, as often the things that we teach and the medicine that we practice are not based on the best quality evidence. This document aims to highlight the strengths and weaknesses of the AR literature to identify areas for future AR research and improved understanding.
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Affiliation(s)
| | | | | | | | - Cezmi A. Akdis
- Allergy/Asthma, Swiss Institute of Allergy and Asthma Research, Switzerland
| | | | - Antoine Azar
- Allergy/Immunology, Johns Hopkins University, USA
| | | | | | | | | | - Cemal Cingi
- Otolaryngology, Eskisehir Osmangazi University, Turkey
| | | | | | | | | | | | | | - Adam DeConde
- Otolaryngology, University of California San Diego, USA
| | | | | | | | | | | | | | - Jan Gosepath
- Otorhinolaryngology, Helios Kliniken Wiesbaden, Germany
| | | | | | | | - Jens M. Hohlfeld
- Respiratory Medicine, Hannover Medical School, Airway Research Fraunhofer Institute for Toxicology and Experimental Medicine, German Center for Lung Research, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | - Amber U. Luong
- Otolaryngology, McGovern Medical School at the University of Texas Health Science Center Houston, USA
| | | | | | | | - Erik Melén
- Pediatric Allergy, Karolinska Institutet, Sweden
| | | | | | - Joaquim Mullol
- Otolaryngology, Universitat de Barcelona, Hospital Clinic, IDIBAPS, Spain
| | | | | | | | - Oliver Pfaar
- Rhinology/Allergy, Medical Faculty Mannheim, Heidelberg University, Center for Rhinology and Allergology, Wiesbaden, Germany
| | | | | | - Carmen Rondón
- Allergy, Regional University Hospital of Málaga, Spain
| | - Luke Rudmik
- Otolaryngology, University of Calgary, Canada
| | - Matthew Ryan
- Otolaryngology, University of Texas Southwestern, USA
| | - Joaquin Sastre
- Allergology, Hospital Universitario Fundacion Jiminez Diaz, Spain
| | | | | | - Hemant P. Sharma
- Allergy/Immunology, Children's National Health System, George Washington University School of Medicine, USA
| | | | | | | | | | | | - De Yun Wang
- Otolaryngology, National University of Singapore, Singapore
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Ipci K, Oktemer T, Muluk NB, Şahin E, Altıntoprak N, Bafaqeeh SA, Kurt Y, Mladina R, Šubarić M, Cingi C. Alternative products to treat allergic rhinitis and alternative routes for allergy immunotherapy. Am J Rhinol Allergy 2018; 30:8-10. [PMID: 29025464 DOI: 10.2500/ajra.2016.30.4364] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Some alternative products instead of immunotherapy are used in patients with allergic rhinitis (AR). METHODS In this paper, alternative products to treat allergic rhinitis and alternative routes for allergy immunotherapy are reviewed. RESULTS Alternative products and methods used instead of immunotherapy are tea therapy, acupuncture, Nigella sativa, cinnamon bark, Spanish needle, acerola, capsaicin (Capsicum annum), allergen-absorbing ointment, and cellulose powder. N. sativa has been used in AR treatment due to its anti-inflammatory effects. N. sativa oil also inhibits the cyclooxygenase and 5-lipoxygenase pathways of arachidonic acid metabolism. The beneficial effects of N. sativa seed supplementation on the symptoms of AR may be due to its antihistaminic properties. To improve the efficacy of immunotherapy, some measures are taken regarding known immunotherapy applications and alternative routes of intralymphatic immunotherapy and epicutaneous immunotherapy are used. CONCLUSION There are alternative routes and products to improve the efficacy of immunotherapy.
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Affiliation(s)
- Kagan Ipci
- Ear, Nose and Throat (ENT) Department, Ankara Koru Hospital, Ankara, Turkey
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Maeda-Yamamoto M, Ohtani T. Development of functional agricultural products utilizing the new health claim labeling system in Japan. Biosci Biotechnol Biochem 2018; 82:554-563. [PMID: 29334323 DOI: 10.1080/09168451.2017.1422175] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
In April 2015, Consumer Affairs Agency of Japan launched a new food labeling system known as "Foods with Function Claims (FFC)." Under this system, the food industry independently evaluates scientific evidence on foods and describes their functional properties. As of May 23, 2017, 1023 FFC containing 8 fresh foods have been launched. Meanwhile, to clarify the health-promoting effects of agricultural products, National Agriculture and Food Research Organization (NARO) implemented the "Research Project on Development of Agricultural Products" and demonstrated the risk reduction of osteoporosis of β-cryptoxanthin rich Satsuma mandarins and the anti-allergic effect of the O-methylated catechin rich tea cultivar Benifuuki. These foods were subsequently released as FFC. Moreover, NARO elucidated the health-promoting effects of various functional agricultural products (β-glucan rich barley, β-conglycinin rich soybean, quercetin rich onion, etc.) and a healthy boxed lunch. This review focuses on new food labeling system or research examining functional aspects of agricultural products.
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Affiliation(s)
- Mari Maeda-Yamamoto
- a Food Research Institute , National Agriculture and Food Research Organization , Tsukuba , Japan
| | - Toshio Ohtani
- b National Agriculture and Food Research Organization , Tsukuba , Japan
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Hirai T, Nishimura Y, Kurata N, Namba H, Iwase M, Gomi Y, Tsuchiya H, Yamakawa T, Kiuchi Y. Effect of Benifuuki Tea on Cytochrome P450-mediated Metabolic Activity in Rats. In Vivo 2018; 32:33-40. [PMID: 29275296 PMCID: PMC5892631 DOI: 10.21873/invivo.11201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 11/25/2017] [Accepted: 11/28/2017] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM Benifuuki tea has recently been used as an alternative therapy for pollinosis, and it may be consumed with pharmaceutical drugs. This study aimed to examine cytochrome P450 (CYP)-mediated food-drug interactions with Benifuuki tea in rats. MATERIALS AND METHODS The inhibitory effects of Benifuuki tea and (-)-epigallocatechin-3-O-(3-O-methyl) gallate (EGCG3"Me) on CYP activities were evaluated in vitro. Midazolam pharmacokinetics was investigated after two treatments with Benifuuki tea. In an ex vivo study, CYP activities were determined after 1-week-treatment with the tea. RESULTS Benifuuki tea and EGCG3"Me inhibited CYP2D and CYP3A activities in a concentration-dependent manner in vitro. However, MDZ metabolism did not change by Benifuuki treatment in vivo and ex vivo. In contrast, CYP2D activity was decreased ex vivo. CONCLUSION Normal intake of Benifuuki tea is not likely to cause food-drug interactions by CYP3A inhibition or induction. In contrast, Benifuuki tea consumption may lead to food-drug interactions through the inhibition of CYP2D.
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Affiliation(s)
- Takahito Hirai
- Department of Pharmacology, Showa University, School of Medicine, Tokyo, Japan
| | - Yuki Nishimura
- Department of Pharmacology, Showa University, School of Medicine, Tokyo, Japan
| | - Norimitsu Kurata
- Faculty of Arts and Sciences at Fujiyoshida, Showa University, Fujiyoshida, Japan
| | - Hokuto Namba
- Showa University Clinical Research Institute for Clinical Pharmacology and Therapeutics, Tokyo, Japan
| | - Mariko Iwase
- Department of Pharmacology, Showa University, School of Medicine, Tokyo, Japan
| | - Yurika Gomi
- Department of Pharmacology, Showa University, School of Medicine, Tokyo, Japan
| | - Hiromichi Tsuchiya
- Department of Medical Education, Showa University, School of Medicine, Tokyo, Japan
| | - Tomoyuki Yamakawa
- Department of Pharmacology, Showa University, School of Medicine, Tokyo, Japan
| | - Yuji Kiuchi
- Department of Pharmacology, Showa University, School of Medicine, Tokyo, Japan
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25
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Maeda-Yamamoto M. Development of functional agricultural products and use of a new health claim system in Japan. Trends Food Sci Technol 2017. [DOI: 10.1016/j.tifs.2017.08.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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26
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Stringer M, Abeysekera I, Thomas J, LaCombe J, Stancombe K, Stewart RJ, Dria KJ, Wallace JM, Goodlett CR, Roper RJ. Epigallocatechin-3-gallate (EGCG) consumption in the Ts65Dn model of Down syndrome fails to improve behavioral deficits and is detrimental to skeletal phenotypes. Physiol Behav 2017; 177:230-241. [PMID: 28478033 PMCID: PMC5525541 DOI: 10.1016/j.physbeh.2017.05.003] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 04/15/2017] [Accepted: 05/01/2017] [Indexed: 12/17/2022]
Abstract
Down syndrome (DS) is caused by three copies of human chromosome 21 (Hsa21) and results in phenotypes including intellectual disability and skeletal deficits. Ts65Dn mice have three copies of ~50% of the genes homologous to Hsa21 and display phenotypes associated with DS, including cognitive deficits and skeletal abnormalities. DYRK1A is found in three copies in humans with Trisomy 21 and in Ts65Dn mice, and is involved in a number of critical pathways including neurological development and osteoclastogenesis. Epigallocatechin-3-gallate (EGCG), the main polyphenol in green tea, inhibits Dyrk1a activity. We have previously shown that EGCG treatment (~10mg/kg/day) improves skeletal abnormalities in Ts65Dn mice, yet the same dose, as well as ~20mg/kg/day did not rescue deficits in the Morris water maze spatial learning task (MWM), novel object recognition (NOR) or balance beam task (BB). In contrast, a recent study reported that an EGCG-containing supplement with a dose of 2-3mg per day (~40-60mg/kg/day) improved hippocampal-dependent task deficits in Ts65Dn mice. The current study investigated if an EGCG dosage similar to that study would yield similar improvements in either cognitive or skeletal deficits. Ts65Dn mice and euploid littermates were given EGCG [0.4mg/mL] or a water control, with treatments yielding average daily intakes of ~50mg/kg/day EGCG, and tested on the multivariate concentric square field (MCSF)-which assesses activity, exploratory behavior, risk assessment, risk taking, and shelter seeking-and NOR, BB, and MWM. EGCG treatment failed to improve cognitive deficits; EGCG also produced several detrimental effects on skeleton in both genotypes. In a refined HPLC-based assay, its first application in Ts65Dn mice, EGCG treatment significantly reduced kinase activity in femora but not in the cerebral cortex, cerebellum, or hippocampus. Counter to expectation, 9-week-old Ts65Dn mice exhibited a decrease in Dyrk1a protein levels in Western blot analysis in the cerebellum. The lack of beneficial therapeutic behavioral effects and potentially detrimental skeletal effects of EGCG found in Ts65Dn mice emphasize the importance of identifying dosages of EGCG that reliably improve DS phenotypes and linking those effects to actions of EGCG (or EGCG-containing supplements) in specific targets in brain and bone.
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Affiliation(s)
- Megan Stringer
- IUPUI, Department of Psychology, 402 North Blackford Street, LD 124, Indianapolis, IN 46202-3275, United States
| | - Irushi Abeysekera
- IUPUI, Department of Biology, 723 West Michigan Street, SL 306, Indianapolis, IN 46202-3275, United States
| | - Jared Thomas
- IUPUI, Department of Biology, 723 West Michigan Street, SL 306, Indianapolis, IN 46202-3275, United States
| | - Jonathan LaCombe
- IUPUI, Department of Biology, 723 West Michigan Street, SL 306, Indianapolis, IN 46202-3275, United States
| | - Kailey Stancombe
- IUPUI, Department of Psychology, 402 North Blackford Street, LD 124, Indianapolis, IN 46202-3275, United States
| | - Robert J Stewart
- IUPUI, Department of Psychology, 402 North Blackford Street, LD 124, Indianapolis, IN 46202-3275, United States
| | - Karl J Dria
- IUPUI, Department of Chemistry and Chemical Biology, 402 North Blackford Street, LD 326, Indianapolis, IN 46202-3275, United States
| | - Joseph M Wallace
- IUPUI, Department of Biomedical Engineering, 723 West Michigan Street, SL 220B, Indianapolis, IN 46202-3275, United States
| | - Charles R Goodlett
- IUPUI, Department of Psychology, 402 North Blackford Street, LD 124, Indianapolis, IN 46202-3275, United States
| | - Randall J Roper
- IUPUI, Department of Biology, 723 West Michigan Street, SL 306, Indianapolis, IN 46202-3275, United States.
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Kobayashi K, Ishizaki Y, Kojo S, Kikuzaki H. Strong Inhibition of Secretory Sphingomyelinase by Catechins, Particularly by (-)-Epicatechin 3-O-Gallate and (-)-3'-O-Methylepigallocatechin 3-O-Gallate. J Nutr Sci Vitaminol (Tokyo) 2017; 62:123-9. [PMID: 27264097 DOI: 10.3177/jnsv.62.123] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Sphingomyelinases (SMases) are key enzymes involved in many diseases which are caused by oxidative stress, such as atherosclerosis, diabetes mellitus, nonalcoholic fatty liver disease, and Alzheimer's disease. SMases hydrolyze sphingomyelin to generate ceramide, a well-known pro-apoptotic lipid. SMases are classified into five types based on pH optimum, subcellular localization, and cation dependence. Previously, we demonstrated that elevation of secretory sphingomyelinase (sSMase) activity increased the plasma ceramide concentration under oxidative stress induced by diabetes and atherosclerosis in murine models. These results suggest that sSMase inhibitors can prevent the progress of these diseases. The present study demonstrated that sSMase activity was activated by oxidation and inhibited by reduction. Furthermore, we examined whether catechins inhibited the sSMase activity in a physiological plasma concentration. Among catechins, (-)-epicatechin 3-O-gallate (ECg) exhibited strong inhibitory effect on sSMase (IC50=25.7 μM). This effect was attenuated by methylation at the 3″- or 4″-position. On the other hand, (-)-epigallocatechin 3-O-gallate (EGCg) and (-)-catechin 3-O-gallate (Cg) exhibited weaker inhibitory activity than ECg, and (-)-epicatechin and (-)-epigallocatechin did not affect sSMase activity. Additionally, one synthetic catechin, (-)-3'-O-methylepigallocatechin 3-O-gallate (EGCg-3'-O-Me), showed the strongest inhibitory effect (IC50=1.7 μM) on sSMase. This phenomenon was not observed for (-)-4'-O-methylepigallocatechin 3-O-gallate. These results suggest that the reduction potential, the presence of the galloyl residue at the C-3 position, and the steric requirement to interact with sSMase protein are important for effective inhibition of sSMase.
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Affiliation(s)
- Keiko Kobayashi
- Department of Food Science and Nutrition, Nara Women's University
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28
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Maeda-Yamamoto M, Ohtani T. Food Labeling System and Development of Functional Agricultural Products: Recent Findings of Research Project on Development of Agricultural Products and Foods with Health-Promoting Benefits (NARO). Food Hygiene and Safety Science (Shokuhin Eiseigaku Zasshi) 2017; 58:65-74. [PMID: 28484134 DOI: 10.3358/shokueishi.58.65] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Mari Maeda-Yamamoto
- National Agriculture and Food Research Organization (NARO), Food Research Institute
| | - Toshio Ohtani
- National Agriculture and Food Research Organization (NARO)
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Seo Y, Kim MK, Choo H, Chong Y. Facile synthesis of 4″-O-alkyl-(–)-EGCG derivatives through regioselective deacetylative alkylation. SYNTHETIC COMMUN 2017. [DOI: 10.1080/00397911.2016.1278233] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Yujin Seo
- Department of Integrative Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Gwangjin-gu, Seoul, South Korea
| | - Mi Kyoung Kim
- Department of Integrative Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Gwangjin-gu, Seoul, South Korea
| | - Hyunah Choo
- Center for Neuro-Medicine, Korea Institute of Science and Technology, Seoungbuk-gu, Seoul, South Korea
- Department of Biological Chemistry, Korea University of Science and Technology, Daejeon, South Korea
| | - Youhoon Chong
- Department of Integrative Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Gwangjin-gu, Seoul, South Korea
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Isolation and dynamic expression of four genes involving in shikimic acid pathway in Camellia sinensis 'Baicha 1' during periodic albinism. Mol Biol Rep 2016; 43:1119-27. [PMID: 27553670 DOI: 10.1007/s11033-016-4045-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Accepted: 07/19/2016] [Indexed: 10/21/2022]
Abstract
Flavonoids are the main flavor components and functional ingredients in tea, and the shikimic acid pathway is considered as one of the most important pathways in flavonoid biosynthesis, but little was known about the function of regulatory genes in the metabolism phenolic compounds in tea plant (Camellia sinensis), especially related genes in shikimic acid pathway. The dynamic changes of catechin (predominant flavonoid) contents were analyzed in this study, and four genes (CsPPT, CsDAHPS, CsSDH and CsCS) involving in shikimic acid pathway in C. sinensis albino cultivar 'Baicha 1' were cloned and characterized. The full-length cDNA sequences of these genes were obtained using reverse transcription-PCR and rapid amplification of cDNA ends. At the albinistic stage, the amounts of all catechins decreased to the lowest levels, when epigallocatechin gallate was the highest, whereas gallocatechin-3-O-gallate the lowest. Gene expression patterns analyzed by qRT-PCR showed that CsPPT and CsDAHPS were highly expressed in flowers and buds, while CsSDH and CsCS showed high expression levels in buds and leaves. It was also found that the transcript abundance of shikimic acid biosynthetic genes followed a tightly regulated biphasic pattern, and was affected by albinism. The transcript levels of CsPPT and CsDAHPS were decreased at albinistic stage followed elevated expression, whereas CsSDH and CsCS were increased only at re-greening stage. Taken together, these findings suggested that these four genes in C. sinensis may play different roles in shikimic acid biosynthesis and these genes may have divergent functions.
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Syntheses of methylated catechins and theaflavins using 2-nitrobenzenesulfonyl group to protect and deactivate phenol. J Antibiot (Tokyo) 2016; 69:299-312. [PMID: 26905756 DOI: 10.1038/ja.2016.14] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 01/26/2016] [Accepted: 01/26/2016] [Indexed: 11/08/2022]
Abstract
An efficient and versatile synthetic method for labile polyphenols was established using 2-nitrobenzenesulfonate (Ns) as a protecting group for phenol. This methodology provides regio- and stereoselective access to a range of methylated catechins, such as methylated epigallocatechin gallates, that are not readily available from natural sources. In addition, biomimetic synthesis of theaflavins from catechins was accomplished using Ns protection to minimize undesired side reactions of electron-rich aromatic rings during oxidation, enabling construction of the complex benzotropolone core in a single-step oxidative coupling reaction. Availability of these compounds will aid detailed structure-biological activity relationship studies of catechins.
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Pezeshki A, Safi S, Feizi A, Askari G, Karami F. The Effect of Green Tea Extract Supplementation on Liver Enzymes in Patients with Nonalcoholic Fatty Liver Disease. Int J Prev Med 2016; 7:28. [PMID: 26955458 PMCID: PMC4763469 DOI: 10.4103/2008-7802.173051] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Accepted: 07/25/2015] [Indexed: 02/06/2023] Open
Abstract
Background: Green tea is one of the most popular beverages in the world. It is believed to have beneficial effects in the prevention and treatment of many diseases, one of which is nonalcoholic fatty liver disease (NAFLD). The present study investigated the effects of consumption of green tea in NAFLD patients. Methods: This study was a double-blind, placebo-controlled, randomized clinical trial. Ultrasonography was used to diagnose fatty liver in patients with alanine aminotransferase (ALT) >31 mg/dl and 41 mg/dl and aspartate aminotransferase (AST) >31 mg/dl and 47 g/dl in women and men, respectively and without other hepatic diseases. A total of 80 participants (20–50 years) with NAFLD were randomly allocated into two groups to receive either green tea extract (GTE) supplement (500 mg GTE tablet per day) or placebo for 90 days. At baseline and at the end of the intervention weight, serum ALT, AST, and alkaline phosphatase (ALP) were measured in fasting state, and dietary data were collected at baseline and end of the study. Results: Green tea group showed significant reductions in ALT and AST levels after 12 weeks period (P < 0.001). The placebo group showed a reduction in ALT and AST levels at the end of the study, but it was no significant. ALP levels showed significant reductions in both groups after 12 weeks period (P < 0.001). Conclusions: According to the findings of this study, GTE supplementation decrease liver enzymes in patients with NAFLD. It can be claimed that GTE prescribed can be considered as a treatment to improve serum levels of liver enzymes in NAFLD patients.
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Affiliation(s)
- Ali Pezeshki
- Department of Community Nutrition, School of Nutrition and Food Sciences, Food Security Research Center, Isfahan University of Medical Sciences, Isfahan, Iran; Department of Nutrition and Food Sciences, Metabolic Liver Diseases Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Sara Safi
- School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Awat Feizi
- Department of Biostatistics and Epidemiology, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Gholamreza Askari
- Department of Community Nutrition, School of Nutrition and Food Sciences, Food Security Research Center, Isfahan University of Medical Sciences, Isfahan, Iran; Department of Nutrition and Food Sciences, Metabolic Liver Diseases Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Fatemeh Karami
- School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
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Oliveira MRD, Nabavi SF, Daglia M, Rastrelli L, Nabavi SM. Epigallocatechin gallate and mitochondria-A story of life and death. Pharmacol Res 2015; 104:70-85. [PMID: 26731017 DOI: 10.1016/j.phrs.2015.12.027] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 12/20/2015] [Accepted: 12/23/2015] [Indexed: 01/05/2023]
Abstract
Epigallocatechin gallate (EGCG) is a flavonoid belonging to the chemical class of falvan-3-ols (catechins) esterified with gallic acid. It is the main catechin found in green tea (Camellia sinensis L.) accounting for about 50% of its total polyphenols. Extensive research performed in recent years has revealed that green tea demonstrates a wide range of positive biological activities against serious chronic diseases such as cardiovascular and neurodegenerative pathologies, cancer, metabolic syndrome and type 2 diabetes. These protective properties can be traced back to the potent antioxidant and anti-inflammatory activities of EGCG. Recent studies have suggested that it may exert its beneficial effects by modulating mitochondrial functions impacting mitochondrial biogenesis, bioenergetic control (ATP production and anabolism), alteration of the cell cycle, and mitochondria-related apoptosis. This review evaluates recent evidence on the ability of EGCG to exert critical influence on the above mentioned pathways.
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Affiliation(s)
- Marcos Roberto de Oliveira
- Department of Chemistry, ICET, Federal University of Mato Grosso (UFMT), Av. Fernando Corrêa da Costa, 2367, CEP 78060-900 Cuiabá, MT, Brazil.
| | - Seyed Fazel Nabavi
- Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Maria Daglia
- Department of Drug Sciences, Medicinal Chemistry and Pharmaceutical Technology Section, University of Pavia, Italy
| | - Luca Rastrelli
- Dipartimento di Farmacia, University of Salerno, via Giovanni Paolo II, 84084 Fisciano, Italy
| | - Seyed Mohammad Nabavi
- Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
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GRID and docking analyses reveal a molecular basis for flavonoid inhibition of Src family kinase activity. J Nutr Biochem 2015; 26:1156-65. [PMID: 26140983 DOI: 10.1016/j.jnutbio.2015.05.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 05/02/2015] [Accepted: 05/08/2015] [Indexed: 11/21/2022]
Abstract
Flavonoids reduce cardiovascular disease risk through anti-inflammatory, anti-coagulant and anti-platelet actions. One key flavonoid inhibitory mechanism is blocking kinase activity that drives these processes. Flavonoids attenuate activities of kinases including phosphoinositide-3-kinase, Fyn, Lyn, Src, Syk, PKC, PIM1/2, ERK, JNK and PKA. X-ray crystallographic analyses of kinase-flavonoid complexes show that flavonoid ring systems and their hydroxyl substitutions are important structural features for their binding to kinases. A clearer understanding of structural interactions of flavonoids with kinases is necessary to allow construction of more potent and selective counterparts. We examined flavonoid (quercetin, apigenin and catechin) interactions with Src family kinases (Lyn, Fyn and Hck) applying the Sybyl docking algorithm and GRID. A homology model (Lyn) was used in our analyses to demonstrate that high-quality predicted kinase structures are suitable for flavonoid computational studies. Our docking results revealed potential hydrogen bond contacts between flavonoid hydroxyls and kinase catalytic site residues. Identification of plausible contacts indicated that quercetin formed the most energetically stable interactions, apigenin lacked hydroxyl groups necessary for important contacts and the non-planar structure of catechin could not support predicted hydrogen bonding patterns. GRID analysis using a hydroxyl functional group supported docking results. Based on these findings, we predicted that quercetin would inhibit activities of Src family kinases with greater potency than apigenin and catechin. We validated this prediction using in vitro kinase assays. We conclude that our study can be used as a basis to construct virtual flavonoid interaction libraries to guide drug discovery using these compounds as molecular templates.
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Kobayashi S, Kato T, Azuma T, Kikuzaki H, Abe K. Anti-allergenic activity of polymethoxyflavones from Kaempferia parviflora. J Funct Foods 2015. [DOI: 10.1016/j.jff.2014.12.029] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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36
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Zhang Y, Lv HP, Ma CY, Guo L, Tan JF, Peng QH, Lin Z. Cloning of a caffeoyl-coenzyme A O-methyltransferase from Camellia sinensis and analysis of its catalytic activity. J Zhejiang Univ Sci B 2015; 16:103-12. [PMID: 25644465 DOI: 10.1631/jzus.b1400193] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Epigallocatechin-3-O-(3-O-methyl) gallate (EGCG3"Me) present in leaves of Camellia sinensis has many beneficial biological activities for human health. However, EGCG3"Me occurs naturally in tea leaves in extremely limited quantities. Finding an enzyme from C. sinensis to catalyze the synthesis of EGCG3"Me is an alternative method to make up for the scarcity of EGCG3"Me in natural situations. In the present study, a complementary DNA (cDNA) encoding region and genomic DNA of the caffeoyl-coenzyme A O-methyltransferase (CCoAOMT) gene were isolated from C. sinensis (designated CsCCoAOMT). Nucleotide sequence analysis of CsCCoAOMT revealed an open reading frame of 738 bp that encodes a polypeptide with a predicted molecular weight of 28 kDa, which correlated well with the results of sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). The full-length DNA sequence (2678 bp) contained five exons and four introns. The deduced amino acid sequence of CsCCoAOMT shared 92% identity with CCoAOMTs from Codonopsis lanceolata and Betula luminifera. The catalytic activity of CsCCoAOMT was analyzed. Three monomethylated epigallocatechin-3-O-gallate (EGCG) compounds (EGCG4"Me, EGCG3"Me, and EGCG3'Me) were produced by CsCCoAOMT with K(m) in the micromolar range. Real-time polymerase chain reaction (RT-PCR) experiments indicated that the CsCCoAOMT transcript was present at low levels during the early stages of leaf maturity (the first leaf and bud on a shoot) but the relative expression was augmented at advanced stages of leaf maturity (the third or fourth leaf on a shoot), which accorded well with changes in EGCG3"Me content in fresh leaves. Hence, we concluded that CsCCoAOMT catalyzes the syntheses of methylated EGCGs.
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Affiliation(s)
- Yue Zhang
- Key Laboratory of Tea Biology and Resource Utilization of Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China
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Fujimura Y. Small molecule-sensing strategy and techniques for understanding the functionality of green tea. Biosci Biotechnol Biochem 2015; 79:687-99. [PMID: 25561325 DOI: 10.1080/09168451.2014.996205] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Various low-molecular-weight phytochemicals in green tea (Camellia sinensis L.), especially (-)-epigallocatechin-3-O-gallate (EGCG), are known to be involved in health promotion and disease risk reduction. However, the underlying mechanism has remained elusive because of the absence of an analytical technique that can easily detect the precise behavior of such a small molecule. Recently, we have identified a cell-surface EGCG-sensing receptor and the related signaling molecules that control the physiological functions of EGCG. We also developed a novel in situ label-free imaging technique for visualizing spatially resolved biotransformations based on simultaneous mapping of EGCG and its phase II metabolites. Furthermore, we established a chemometric method capable of evaluating the functionality of multicomponent green tea extracts by focusing on their compositional balances. This review highlights our proposed small molecule-sensing techniques for detecting the complex behavior of green tea components and linking such information to an enhanced understanding of green tea functionality.
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Affiliation(s)
- Yoshinori Fujimura
- a Innovation Center for Medical Redox Navigation , Kyushu University , Fukuoka , Japan
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38
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Benedik E, Skrt M, Podlipnik C, Ulrih NP. Binding of flavonoids to staphylococcal enterotoxin B. Food Chem Toxicol 2014; 74:1-8. [PMID: 25193263 DOI: 10.1016/j.fct.2014.08.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Revised: 07/29/2014] [Accepted: 08/21/2014] [Indexed: 10/24/2022]
Abstract
Staphylococcal enterotoxins are metabolic products of Staphylococcus aureus that are responsible for the second-most-commonly reported type of food poisoning. Polyphenols are known to interact with proteins to form complexes, the properties of which depend on the structures of both the polyphenols and the protein. In the present study, we investigated the binding of four flavonoid polyphenols to Staphylococcal enterotoxin B (SEB) at pH 7.5 and 25 °C: (-)-epigallocatechin-3-gallate (EGCG), (-)-epigallocatechin (EGC), kaempferol-3-glucoside (KAM-G) and kaempferol (KAM). Fluorescence emission spectrometry and molecular docking were applied to compare experimentally determined binding parameters with molecular modeling. EGCG showed an order of magnitude higher binding constant (1.4 × 10(5) M(-1)) than the other studied polyphenols. Our blind-docking results showed that EGCG and similar polyphenolic ligands is likely to bind to the channel at the surface of SEB that is responsible for the recognition of the T-cell beta chain fragment and influence the adhesion of SEB to T cells.
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Affiliation(s)
- Evgen Benedik
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia
| | - Mihaela Skrt
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia
| | - Crtomir Podlipnik
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Aškerčeva 5, 1000 Ljubljana, Slovenia
| | - Nataša Poklar Ulrih
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia; Centre of Excellence for Integrated Approaches in Chemistry and Biology of Proteins (CipKeBiP), Jamova 39, Ljubljana, Slovenia.
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Tokura T, Nakano N, Ito T, Matsuda H, Nagasako-Akazome Y, Kanda T, Ikeda M, Okumura K, Ogawa H, Nishiyama C. Inhibitory Effect of Polyphenol-Enriched Apple Extracts on Mast Cell Degranulationin VitroTargeting the Binding between IgE and FcεRI. Biosci Biotechnol Biochem 2014; 69:1974-7. [PMID: 16244451 DOI: 10.1271/bbb.69.1974] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Extracts from immature fruit of the apple (Rosaceae, Malus sp.), which contain procyanidins (polymers of catechins) as the major ingredients, are known to inhibit histamine release from mast cells. We analyzed in this study the mechanism for the anti-allergic activity of two polyphenol-enriched apple extracts. These extracts, termed "crude apple polyphenol (CAP)" and "apple condensed tannin (ACT)", reduced the degranulation of mast cells caused by cross-linking of the high-affinity receptor for IgE (FcepsilonRI) with IgE and the antigen in a dose-dependent manner. Furthermore, western blotting revealed that phosphorylation of the intracellular signal-transduction molecules caused by cross-linking of FcepsilonRI was markedly decreased by the addition of CAP or ACT. We then analyzed the effects of CAP and ACT on the binding of the IgE antibody to FcepsilonRI on mast cells, which is the first key step in the allergic reaction mediated by mast cells, and found that this binding was markedly inhibited by both CAP and ACT. These results indicate that the inhibition of binding between FcepsilonRI and IgE by either CAP or ACT was the probable cause of the suppression of mast cell activation. This is the first report demonstrating the molecular mechanism for the anti-allergic effect of procyanidin-enriched extracts from apples.
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Affiliation(s)
- Tomoko Tokura
- Atopy (Allergy) Research Center, Juntendo University School of Medicine, Hongo, Tokyo, Japan
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Effects of Peanut-Skin Procyanidin A1 on Degranulation of RBL-2H3 Cells. Biosci Biotechnol Biochem 2014; 75:1644-8. [DOI: 10.1271/bbb.110085] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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41
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Analysis of naturally occurring 3″-Methyl-epigallocatechin gallate in 71 major tea cultivars grown in China and its processing characteristics. J Funct Foods 2014. [DOI: 10.1016/j.jff.2013.12.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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42
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Masuda S, Maeda-Yamamoto M, Usui S, Fujisawa T. 'Benifuuki' Green Tea Containing O-Methylated Catechin Reduces Symptoms of Japanese Cedar Pollinosis: A Randomized, Double- Blind, Placebo-Controlled Trial. Allergol Int 2014; 63:211-217. [DOI: 10.2332/allergolint.13-oa-0620] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Accepted: 11/11/2013] [Indexed: 02/05/2023] Open
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43
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Cai S, Zhong Y, Li Y, Huang J, Zhang J, Luo G, Liu Z. Blockade of the formation of insoluble ubiquitinated protein aggregates by EGCG3"Me in the alloxan-induced diabetic kidney. PLoS One 2013; 8:e75687. [PMID: 24098713 PMCID: PMC3787087 DOI: 10.1371/journal.pone.0075687] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Accepted: 08/20/2013] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Renal accumulation of reactive carbonyl compounds (RCCs) has been linked to the progression of diabetic nephropathy. We previously demonstrated that carbonyl stress induces the formation of amino-carbonyl cross-links and sharply increases the content of β-sheet-rich structures, which is the seed of insoluble aggregates formation, and tea catechin (-)-epigallocatechin 3-gallate (EGCG) can reverse this process in vitro and in vivo. In this study, methylated derivative (-)-epigallocatechin-3-O-(3-O-methyl)-gallate (EGCG3"Me) was hypothesized to neutralize carbonyl stress mediating the formation of insoluble ubiquitinated protein (IUP) aggregates, and reduce the early development of diabetic nephropathy. METHODS AND RESULTS Diabetes was induced in mice by intraperitoneally injecting alloxan monohydrate (200 mg/kg/d) twice and administering EGCG3"Me by gavage for 15 d. Reagent case and western blot results showed that, in diabetic kidneys, the carbonyl proteins in the serum increased; and in insoluble protein fraction, 4-hydroxynonenal-modified proteins, IUP aggregates and p62 accumulated; FT-IR study demonstrated that the lipid content, anti-parallel β-sheet structure and aggregates increased. EGCG3"Me treatment could effectively reverse this process, even better than the negative control treatment. CONCLUSIONS EGCG3"Me exhibiting anti-β-sheet-rich IUP aggregate properties, maybe represents a new strategy to impede the progression of diabetic nephropathy and other diabetic complications.
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Affiliation(s)
- Shuxian Cai
- Key Laboratory of Ministry of Education for Tea Science, Hunan Agricultural University, Changsha, Hunan Province, China
- Department of Biochemistry and Molecular Biology, Peking University Health Science Center, Beijing, China
| | - Yuan Zhong
- Key Laboratory of Ministry of Education for Tea Science, Hunan Agricultural University, Changsha, Hunan Province, China
- National Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Changsha, Hunan Province, China
| | - Yinhua Li
- National Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Changsha, Hunan Province, China
| | - Jianan Huang
- Key Laboratory of Ministry of Education for Tea Science, Hunan Agricultural University, Changsha, Hunan Province, China
| | - Jing Zhang
- National Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Changsha, Hunan Province, China
| | - Guoan Luo
- Department of Chemistry of Tsinghua and Key Laboratory of Biological Organic Phosphorus and Chemical Biology of Ministry of Education, Tsinghua University, Beijing, China
| | - Zhonghua Liu
- Key Laboratory of Ministry of Education for Tea Science, Hunan Agricultural University, Changsha, Hunan Province, China
- National Research Center of Engineering Technology for Utilization of Botanical Functional Ingredients, Changsha, Hunan Province, China
- Department of Chemistry of Tsinghua and Key Laboratory of Biological Organic Phosphorus and Chemical Biology of Ministry of Education, Tsinghua University, Beijing, China
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Sakata R, Nakamura T, Torimura T, Ueno T, Sata M. Green tea with high-density catechins improves liver function and fat infiltration in non-alcoholic fatty liver disease (NAFLD) patients: a double-blind placebo-controlled study. Int J Mol Med 2013; 32:989-94. [PMID: 24065295 DOI: 10.3892/ijmm.2013.1503] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Accepted: 08/19/2013] [Indexed: 02/07/2023] Open
Abstract
Catechins, a major component of green tea extract, have anti-hyperlipidemic effects. The present study investigated the effects of consumption of green tea with high-density catechins in non-alcoholic fatty liver disease (NAFLD) patients. Seventeen patients with NAFLD consumed green tea with high-density catechins, low-density catechins or a placebo for 12 weeks in a randomized double-blind study. Ultrasonography and computed tomography (CT) were performed at baseline and after 12 weeks. Serum alanine aminotransferase (ALT) levels and urine 8-isoprostane were monitored and compared to baseline at 4, 8 and 12 weeks. Body fat was significantly decreased in the high-density catechin group compared with the placebo and low-density catechin groups after 12 weeks of consumption. All the patients in the high-density catechin group showed a significantly improved liver-to-spleen CT attenuation ratio compared with the placebo and low-density catechin groups after 12 weeks of consumption. The high-density catechin group significantly decreased serum ALT levels and reduced urinary 8-isoprostane excretion compared with the placebo and low-density catechin group after 12 weeks of consumption. Based on a reduced proportion of body fat as estimated by bioimpedance measurement, increased liver-to-spleen CT attenuation ratio, decreased serum ALT levels and reduced urinary 8-isoprostane excretion, we concluded that 12 weeks of 700 ml per day of green tea containing >1 g catechin improved liver fat content and inflammation by reducing oxidative stress in patients with NAFLD.
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Affiliation(s)
- Ryuichiro Sakata
- Division of Gastroenterology, Department of Medicine, Kurume University School of Medicine, Kurume 830-0011, Japan
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Ma C, Lv H, Zhang X, Chen Z, Shi J, Lu M, Lin Z. Identification of regioisomers of methylated kaempferol and quercetin by ultra high performance liquid chromatography quadrupole time-of-flight (UHPLC-QTOF) tandem mass spectrometry combined with diagnostic fragmentation pattern analysis. Anal Chim Acta 2013; 795:15-24. [PMID: 23998533 DOI: 10.1016/j.aca.2013.07.038] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Revised: 07/13/2013] [Accepted: 07/17/2013] [Indexed: 11/24/2022]
Abstract
The O-methylation of active flavonoids can enhance their antiallergic, anticancerous, and cardioprotective effects depending on the methylation position. Thus, it is biologically and pharmacologically important to differentiate methylated flavonoid regioisomers. In this study, we examined the regioisomers of methylated kaempferol and quercetin using ultra high performance liquid chromatography quadrupole time-of-flight tandem mass spectrometry. The methyl groups on the flavonoids can generally be cleaved as methyl radicals in a position-independent manner. We found that methyl groups can be cleaved as methane. If there are protons adjacent the methoxy on the flavonol rings, intra-molecule proton transfer can occur via collision-induced dissociation, and one molecule of methane can then be eliminated. The remaining charged fragment ([M+H-CH4](+)) reflects the adjacent structure and is specific to the methoxy position. Furthermore, the retro Diels-Alder (RDA) fragmentation of methylated flavonols can generate fragments with the methoxy at the original methylated ring. Combining the position-specific [M+H-CH4](+) fragment with the RDA fragments provides a diagnostic pattern for rapidly identifying methylated regioisomeric flavonols. Along with their retention behaviour, we have successfully identified ten regioisomers of methylated kaempferol and quercetin, which include six compounds previously reported in plants and shown to be biologically active. The developed approach is sensitive, rapid, reliable, and requires few standard compounds. It is highly efficient for characterising the specificity of novel flavonoid O-methyltransferases and can help direct enzymatic or chemical syntheses during the early stages of drug discovery. This method also has potential for use in identifying other methylated isomeric flavonoids.
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Affiliation(s)
- Chengying Ma
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, Zhejiang 310008, China
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Jiang X, Liu Y, Li W, Zhao L, Meng F, Wang Y, Tan H, Yang H, Wei C, Wan X, Gao L, Xia T. Tissue-specific, development-dependent phenolic compounds accumulation profile and gene expression pattern in tea plant [Camellia sinensis]. PLoS One 2013; 8:e62315. [PMID: 23646127 PMCID: PMC3639974 DOI: 10.1371/journal.pone.0062315] [Citation(s) in RCA: 137] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Accepted: 03/20/2013] [Indexed: 12/03/2022] Open
Abstract
Phenolic compounds in tea plant [Camellia sinensis (L.)] play a crucial role in dominating tea flavor and possess a number of key pharmacological benefits on human health. The present research aimed to study the profile of tissue-specific, development-dependent accumulation pattern of phenolic compounds in tea plant. A total of 50 phenolic compounds were identified qualitatively using liquid chromatography in tandem mass spectrometry technology. Of which 29 phenolic compounds were quantified based on their fragmentation behaviors. Most of the phenolic compounds were higher in the younger leaves than that in the stem and root, whereas the total amount of proanthocyanidins were unexpectedly higher in the root. The expression patterns of 63 structural and regulator genes involved in the shikimic acid, phenylpropanoid, and flavonoid pathways were analyzed by quantitative real-time polymerase chain reaction and cluster analysis. Based on the similarity of their expression patterns, the genes were classified into two main groups: C1 and C2; and the genes in group C1 had high relative expression level in the root or low in the bud and leaves. The expression patterns of genes in C2-2-1 and C2-2-2-1 groups were probably responsible for the development-dependent accumulation of phenolic compounds in the leaves. Enzymatic analysis suggested that the accumulation of catechins was influenced simultaneously by catabolism and anabolism. Further research is recommended to know the expression patterns of various genes and the reason for the variation in contents of different compounds in different growth stages and also in different organs.
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Affiliation(s)
- Xiaolan Jiang
- Key Laboratory of Tea Biochemistry and Biotechnology, Ministry of Education in China, Anhui Agricultural University, Hefei, Anhui, China
| | - Yajun Liu
- School of Life Science, Anhui Agricultural University, Hefei, Anhui, China
| | - Weiwei Li
- School of Life Science, Anhui Agricultural University, Hefei, Anhui, China
| | - Lei Zhao
- Key Laboratory of Tea Biochemistry and Biotechnology, Ministry of Education in China, Anhui Agricultural University, Hefei, Anhui, China
| | - Fei Meng
- Key Laboratory of Tea Biochemistry and Biotechnology, Ministry of Education in China, Anhui Agricultural University, Hefei, Anhui, China
| | - Yunsheng Wang
- School of Life Science, Anhui Agricultural University, Hefei, Anhui, China
| | - Huarong Tan
- Biotechnology Center, Anhui Agricultural University, Hefei, Anhui, China
| | - Hua Yang
- Key Laboratory of Tea Biochemistry and Biotechnology, Ministry of Education in China, Anhui Agricultural University, Hefei, Anhui, China
| | - Chaoling Wei
- Key Laboratory of Tea Biochemistry and Biotechnology, Ministry of Education in China, Anhui Agricultural University, Hefei, Anhui, China
| | - Xiaochun Wan
- Key Laboratory of Tea Biochemistry and Biotechnology, Ministry of Education in China, Anhui Agricultural University, Hefei, Anhui, China
| | - Liping Gao
- School of Life Science, Anhui Agricultural University, Hefei, Anhui, China
- * E-mail: (TX); (LG)
| | - Tao Xia
- Key Laboratory of Tea Biochemistry and Biotechnology, Ministry of Education in China, Anhui Agricultural University, Hefei, Anhui, China
- * E-mail: (TX); (LG)
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Wright B, Spencer JPE, Lovegrove JA, Gibbins JM. Insights into dietary flavonoids as molecular templates for the design of anti-platelet drugs. Cardiovasc Res 2013; 97:13-22. [PMID: 23024269 PMCID: PMC3527766 DOI: 10.1093/cvr/cvs304] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Revised: 09/19/2012] [Accepted: 09/24/2012] [Indexed: 12/30/2022] Open
Abstract
Flavonoids are low-molecular weight, aromatic compounds derived from fruits, vegetables, and other plant components. The consumption of these phytochemicals has been reported to be associated with reduced cardiovascular disease (CVD) risk, attributed to their anti-inflammatory, anti-proliferative, and anti-thrombotic actions. Flavonoids exert these effects by a number of mechanisms which include attenuation of kinase activity mediated at the cell-receptor level and/or within cells, and are characterized as broad-spectrum kinase inhibitors. Therefore, flavonoid therapy for CVD is potentially complex; the use of these compounds as molecular templates for the design of selective and potent small-molecule inhibitors may be a simpler approach to treat this condition. Flavonoids as templates for drug design are, however, poorly exploited despite the development of analogues based on the flavonol, isoflavonone, and isoflavanone subgroups. Further exploitation of this family of compounds is warranted due to a structural diversity that presents great scope for creating novel kinase inhibitors. The use of computational methodologies to define the flavonoid pharmacophore together with biological investigations of their effects on kinase activity, in appropriate cellular systems, is the current approach to characterize key structural features that will inform drug design. This focussed review highlights the potential of flavonoids to guide the design of clinically safer, more selective, and potent small-molecule inhibitors of cell signalling, applicable to anti-platelet therapy.
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Affiliation(s)
- Bernice Wright
- Institute for Cardiovascular and Metabolic Research, Schools of Biological Sciences, University of Reading, Berkshire, Reading RG6 6UB, UK.
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Egashira Y, Kamohara T, Yamaguchi W, Irie H, Toyoda Y, Hanamura M, Hirai S, Shinoda Y, Maeda-Yamamoto M. Suppression of Postprandial Hypertriglyceridemia in Rats by Benifuuki Tea Extract. J JPN SOC FOOD SCI 2013. [DOI: 10.3136/nskkk.60.407] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Lin J, Della-Fera MA, Baile CA. Green Tea Polyphenol Epigallocatechin Gallate Inhibits Adipogenesis and Induces Apoptosis in 3T3-L1 Adipocytes. ACTA ACUST UNITED AC 2012; 13:982-90. [PMID: 15976140 DOI: 10.1038/oby.2005.115] [Citation(s) in RCA: 165] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE Green tea catechins have been shown to promote loss of body fat and to inhibit growth of many cancer cell types by inducing apoptosis. The objective of this study was to determine whether epigallocatechin gallate (EGCG), the primary green tea catechin, could act directly on adipocytes to inhibit adipogenesis and induce apoptosis. RESEARCH METHODS AND PROCEDURES Mouse 3T3-L1 preadipocytes and mature adipocytes were used. To test the effect of EGCG on viability, cells were incubated for 3, 6, 12, or 24 hours with 0, 50, 100, or 200 microM EGCG. Viability was quantitated by MTS assay. To determine the effect of EGCG on apoptosis, adipocytes were incubated for 24 hours with 0 to 200 microM EGCG, then stained with annexin V and propidium iodide and analyzed by laser scanning cytometry. Both preadipocytes and adipocytes were also analyzed for apoptosis by terminal deoxynucleotidyl transferase dUTP nick-end labeling assay. To determine the effect of EGCG on adipogenesis, maturing preadipocytes were incubated during the 6-day induction period with 0 to 200 microM EGCG, then stained with Oil-Red-O and analyzed for lipid content. RESULTS EGCG had no effect on either viability or apoptosis of preconfluent preadipocytes. EGCG also did not affect viability of mature adipocytes; however, EGCG increased apoptosis in mature adipocytes, as demonstrated by both laser scanning cytometry and terminal deoxynucleotidyl transferase dUTP nick-end labeling assays. Furthermore, EGCG dose-dependently inhibited lipid accumulation in maturing preadipocytes. DISCUSSION These results demonstrate that EGCG can act directly to inhibit differentiation of preadipocytes and to induce apoptosis of mature adipocytes and, thus, could be an important adjunct in the treatment of obesity.
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Affiliation(s)
- Ji Lin
- 444 Edgar L. Rhodes Center for Animal and Dairy Science, University of Georgia, Athens, GA 30602-2771, USA
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50
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Maeda-Yamamoto M, Ema K, Monobe M, Tokuda Y, Tachibana H. Epicatechin-3-O-(3″-O-methyl)-gallate content in various tea cultivars (Camellia sinensis L.) and its in vitro inhibitory effect on histamine release. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:2165-2170. [PMID: 22339247 DOI: 10.1021/jf204497b] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
It has been reported that epigallocatechin-3-O-(3″-O-methyl)-gallate (EGCG3″Me) and the EGCG3″Me-rich green tea ( Camellia sinensis L.) cultivar 'Benifuuki' exhibit antiallergic effects. The objective of this study was to investigate the effect of various tea leaf catechins on histamine release from murine bone marrow mast cells (BMMC). At a dose of 50 μg/mL, the rank order of histamine release inhibition was observed to be epicatechin-3-O-(3″-O-methyl)-gallate (ECG3″Me) > gallocatechin-3-O-(3″-O-methyl)-gallate (GCG3″Me) > EGCG3″Me > gallocatechin-gallate (GCG) > catechin-gallate (CG) > EGCG > epicatechin-gallate (ECG) > epigallocatechin (EGC) > gallocatechin (GC). Of the various tea cultivars analyzed by HPLC, the greatest content of ECG3″Me was found in the third crop of 'Benifuuki' (1.05% dry weight). Moreover, ECG3″Me content was positively correlated with EGCG3″Me content in 'Benifuuki' tea leaves. In an assay of mixtures of ECG3″Me and EGCG3″Me, inhibitory activity (50 μg/mL in total) was increased as the content of ECG3″Me increased. This suggests that ECG3″Me might link to the antiallergic effect of 'Benifuuki' tea, as has been reported for EGCG3″Me.
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Affiliation(s)
- Mari Maeda-Yamamoto
- National Institute of Vegetable and Tea Science, National Agriculture and Food Research Organization, Kanaya, Shizuoka, Japan.
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