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Cañellas-Santos M, Rosell-Vives E, Montell L, Bilbao A, Goñi-de-Cerio F, Fernandez-Campos F. Anti-Inflammatory and Anti-Quorum Sensing Effect of Camellia sinensis Callus Lysate for Treatment of Acne. Curr Issues Mol Biol 2023; 45:3997-4016. [PMID: 37232724 PMCID: PMC10217533 DOI: 10.3390/cimb45050255] [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: 02/13/2023] [Revised: 04/26/2023] [Accepted: 04/30/2023] [Indexed: 05/27/2023] Open
Abstract
Cutibacterium acnes (C. acnes) is involved in the pathogenesis of acne by inducing inflammation and biofilm formation, along with other virulence factors. A Camellia sinensis (C. sinensis) callus lysate is proposed to reduce these effects. The aim of the present work is to study the anti-inflammatory properties of a callus extract from C. sinensis on C. acnes-stimulated human keratinocytes and the quorum-quenching activities. Keratinocytes were stimulated with thermo-inactivated pathogenic C. acnes and were treated with the herbal lysate (0.25% w/w) to evaluate its anti-inflammatory effect. C. acnes biofilm was developed in vitro and treated with 2.5 and 5% w/w of the lysate to evaluate quorum sensing and the lipase activity. The results showed that the lysate was able to reduce the production of interleukin-6 (IL-6), interleukin-8 (IL-8), tumor necrosis factor-α (TNF-α), and C-X-C motif chemokine ligand 1 (CXCL1), and decrease the nuclear translocation of nuclear factor kappa light chain enhancer of activated B cells (NF-κB). The lysate did not show bactericidal activity but showed diminished biofilm formation, the lipase activity, and the production of autoinducer 2 (AI-2), a member of a family of signaling molecules used in quorum sensing. Therefore, the proposed callus lysate could have the potential to reduce acne-related symptoms without the eradication of C. acnes, which is part of the natural skin microbiome.
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Affiliation(s)
| | | | - Laia Montell
- Laboratory Reig Jofre, Avda del Flors s/n, 08970 Sant Joan Despí, Barcelona, Spain
| | - Ainhoa Bilbao
- GAIKER Technology Centre, Basque Research and Technology Alliance (BRTA), Parque Tecnológico de Bizkaia, Edif. 202, 48170 Zamudio, Spain
| | - Felipe Goñi-de-Cerio
- GAIKER Technology Centre, Basque Research and Technology Alliance (BRTA), Parque Tecnológico de Bizkaia, Edif. 202, 48170 Zamudio, Spain
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2
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Shi M, Watson E, Conlon M, Sanguansri L, Augustin MA. Impact of Co-Delivery of EGCG and Tuna Oil within a Broccoli Matrix on Human Gut Microbiota, Phenolic Metabolites and Short Chain Fatty Acids In Vitro. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27030656. [PMID: 35163921 PMCID: PMC8839344 DOI: 10.3390/molecules27030656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/12/2022] [Accepted: 01/13/2022] [Indexed: 11/21/2022]
Abstract
(-)-Epigallocatechin gallate (EGCG) and tuna oil (TO) are beneficial bioactive compounds. EGCG, TO or a combination of, delivered by broccoli by-products (BBP), were added to an in vitro anaerobic fermentation system containing human fecal inocula to examine their ability to generate short-chain fatty acids (SCFA), metabolize EGCG and change the gut microbiota population (assessed by 16 S gene sequencing). Following 24 h fermentation, EGCG was hydrolyzed to (-)-epigallocatechin and gallic acid. EGCG significantly inhibited the production of SCFA (p < 0.05). Total SCFA in facal slurries with BBP or TO-BBP (48–49 µmol/mL) were significantly higher (p < 0.05) than the negative control with cellulose (21 µmol/mL). EGCG-BBP and TO-EGCG-BBP treatment increased the relative abundance of Gluconacetobacter, Klebsiella and Trabulsiella. BBP and TO-BBP showed the greatest potential for improving gut health with the growth promotion of high butyrate producers, including Collinsella aerofaciens, Bacillus coagulans and Lactobacillus reuteri.
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Affiliation(s)
- Meng Shi
- College of Food Science and Technology, Hunan Agricultural University, Changsha 410128, China;
- Tea Research Institute, Zhejiang University, Hangzhou 310058, China
- CSIRO Agriculture and Food, 671 Sneydes Road, Werribee, VIC 3030, Australia; (L.S.); (M.A.A.)
| | - Emma Watson
- CSIRO Health and Biosecurity, Kintore Ave., Adelaide, SA 5000, Australia;
| | - Michael Conlon
- CSIRO Health and Biosecurity, Kintore Ave., Adelaide, SA 5000, Australia;
- Correspondence:
| | - Luz Sanguansri
- CSIRO Agriculture and Food, 671 Sneydes Road, Werribee, VIC 3030, Australia; (L.S.); (M.A.A.)
| | - Mary Ann Augustin
- CSIRO Agriculture and Food, 671 Sneydes Road, Werribee, VIC 3030, Australia; (L.S.); (M.A.A.)
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Wang X, Dong W, Zhang X, Zhu Z, Chen Y, Liu X, Guo C. Antiviral Mechanism of Tea Polyphenols against Porcine Reproductive and Respiratory Syndrome Virus. Pathogens 2021; 10:pathogens10020202. [PMID: 33668502 PMCID: PMC7917843 DOI: 10.3390/pathogens10020202] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 02/07/2021] [Accepted: 02/10/2021] [Indexed: 02/07/2023] Open
Abstract
Neither inactivated nor attenuated vaccines can effectively prevent and control the infection and spread of porcine reproductive and respiratory syndrome virus (PRRSV). Therefore, it is necessary to broaden new horizons and to conceive effective preventive strategies. The main components of Tea polyphenol (TPP) are catechins and their derivatives. TPP has many physiological activities and has certain antiviral and antifungal effects. However, whether TPP shows anti-PRRSV activity remains unclear. We found that TPP effectively inhibited PRRSV infection in Marc-145 cells by suppressing the stages of viral attachment, internalization, replication, and release. TPP exhibited a potent anti-PRRSV effect regardless of pre-treatment or post-treatment. In addition, we demonstrated that TPP restrained PRRSV-induced p65 entry into the nucleus to suppress the activation of the NF-κB signaling pathway, which ultimately leads to the inhibition of the expression of inflammatory cytokines. Furthermore, TPP limited the synthesis of viral non-structural protein 2 (nsp2), the core component of viral replication transcription complexes, which may contribute to the inhibition of viral RNA replication. TPP has the potential to develop into an effective antiviral agent for PRRSV prevention and control in the future.
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Liu Y, Wu F, Zhu Y, Chen Y, Murray K, Lu Z, Warriner K. Survival of toxigenic
Escherichia coli
on chamomile, peppermint, green, black, ginger, and cinnamon teas during storage and brewing. J Food Saf 2020. [DOI: 10.1111/jfs.12831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yanan Liu
- College of Food Science and Technology Nanjing Agricultural University Nanjing China
| | - Fan Wu
- Department of Food Science University of Guelph Guelph Canada
| | - Yan Zhu
- Department of Food Science University of Guelph Guelph Canada
| | - Yirui Chen
- Department of Genetics, Bioinformatics and Computational Biology Virginia Polytechnic Institute and State University Blacksburg USA
| | - Kayla Murray
- Department of Food Science University of Guelph Guelph Canada
| | - Zhaoxin Lu
- College of Food Science and Technology Nanjing Agricultural University Nanjing China
| | - Keith Warriner
- Department of Food Science University of Guelph Guelph Canada
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Becker LC, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD, Liebler DC, Marks JG, Shank RC, Slaga TJ, Snyder PW, Gill LJ, Heldreth B. Safety Assessment of Camellia sinensis-Derived Ingredients As Used in Cosmetics. Int J Toxicol 2019; 38:48S-70S. [PMID: 31840549 DOI: 10.1177/1091581819889914] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Cosmetic ingredients derived from Camellia sinensis (tea) plant parts function as antioxidants and skin conditioning agents-humectant and miscellaneous. The Cosmetic Ingredient Review (CIR) Expert Panel (Panel) reviewed relevant animal and human data related to these ingredients. The use of the leaf ingredients in beverages results in much larger systemic exposures than those possible from cosmetic use. Accordingly, concern over the systemic toxicity potential of leaf-derived ingredients is mitigated. Because product formulations may contain multiple botanical ingredients, each containing the same constituents of concern, formulators are advised to be aware of these constituents and to avoid reaching levels that may lead to sensitization or other toxic effects. The Panel concluded that the C sinensis leaf-derived ingredients are safe in the present practices of use and concentration described in this safety assessment when formulated to be nonsensitizing. However, the available data are insufficient to determine whether the non-leaf-derived ingredients are safe for use in cosmetics.
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Affiliation(s)
- Lillian C Becker
- Cosmetic Ingredient Review Former Scientific Analyst/Writer, Cosmetic Ingredient Review, Washington, DC, USA
| | - Wilma F Bergfeld
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Donald V Belsito
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Ronald A Hill
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Curtis D Klaassen
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Daniel C Liebler
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - James G Marks
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Ronald C Shank
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Thomas J Slaga
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Paul W Snyder
- Cosmetic Ingredient Review Expert Panel Member, Cosmetic Ingredient Review, Washington, DC, USA
| | - Lillian J Gill
- Cosmetic Ingredient Review Former Director, Cosmetic Ingredient Review, Washington, DC, USA
| | - Bart Heldreth
- Cosmetic Ingredient Review Executive Director, Cosmetic Ingredient Review, Washington, DC, USA
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6
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Chen T, Yang CS. Biological fates of tea polyphenols and their interactions with microbiota in the gastrointestinal tract: implications on health effects. Crit Rev Food Sci Nutr 2019; 60:2691-2709. [DOI: 10.1080/10408398.2019.1654430] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Tingting Chen
- School of Food Science & Technology, State Key Laboratory of Food Science & Technology, Nanchang University, Nanchang, China
| | - Chung S. Yang
- Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
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Kusumawardani A, Sukmasari S, Akmal Abdul Mutalib N, Fatihah Abdul Rahman S, Jauhari Arief Ichwan S. Comparative study of antimicrobial potential of White tea and Black tea leaf extracts from East Java-Indonesia on two species of oral streptococci. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.matpr.2019.06.114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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8
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Chang EH, Huang J, Lin Z, Brown AC. Catechin-mediated restructuring of a bacterial toxin inhibits activity. Biochim Biophys Acta Gen Subj 2018; 1863:191-198. [PMID: 30342156 DOI: 10.1016/j.bbagen.2018.10.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 10/12/2018] [Accepted: 10/15/2018] [Indexed: 10/28/2022]
Abstract
BACKGROUND Catechins, polyphenols derived from tea leaves, have been shown to have antibacterial properties, through direct killing of bacteria as well as through inhibition of bacterial toxin activity. In particular, certain catechins have been shown to have bactericidal effects on the oral bacterium, Aggregatibacter actinomycetemcomitans, as well as the ability to inhibit a key virulence factor of this organism, leukotoxin (LtxA). The mechanism of catechin-mediated inhibition of LtxA has not been shown. METHODS In this work, we studied the ability of six catechins to inhibit LtxA-mediated cytotoxicity in human white blood cells, using Trypan blue staining, and investigated the mechanism of action using a combination of techniques, including fluorescence and circular dichroism spectroscopy, confocal microscopy, and surface plasmon resonance. RESULTS We found that all the catechins except (-)-catechin inhibited the activity of this protein, with the galloylated catechins having the strongest effect. Pre-incubation of the toxin with the catechins increased the inhibitory action, indicating that the catechins act on the protein, rather than the cell. The secondary structure of LtxA was dramatically altered in the presence of catechin, which resulted in an inhibition of toxin binding to cholesterol, an important initial step in the cytotoxic mechanism of the toxin. CONCLUSIONS These results demonstrate that the catechins inhibit LtxA activity by altering its structure to prevent interaction with specific molecules present on the host cell surface. GENERAL SIGNIFICANCE Galloylated catechins modify protein toxin structure, inhibiting the toxin from binding to the requisite molecules on the host cell surface.
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Affiliation(s)
- En Hyung Chang
- Department of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, PA 18015, USA
| | - Joanne Huang
- Department of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, PA 18015, USA
| | - Zixiang Lin
- Department of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, PA 18015, USA
| | - Angela C Brown
- Department of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, PA 18015, USA.
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9
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Rahman SU, Li Y, Huang Y, Zhu L, Feng S, Wu J, Wang X. Treatment of inflammatory bowel disease via green tea polyphenols: possible application and protective approaches. Inflammopharmacology 2018. [DOI: 10.1007/s10787-018-0462-4] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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10
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Guo L, Guo J, Zhu W, Jiang X. Optimized synchronous extraction process of tea polyphenols and polysaccharides from Huaguoshan Yunwu tea and their antioxidant activities. FOOD AND BIOPRODUCTS PROCESSING 2016. [DOI: 10.1016/j.fbp.2016.08.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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11
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Ayrle H, Mevissen M, Kaske M, Nathues H, Gruetzner N, Melzig M, Walkenhorst M. Medicinal plants--prophylactic and therapeutic options for gastrointestinal and respiratory diseases in calves and piglets? A systematic review. BMC Vet Res 2016; 12:89. [PMID: 27268043 PMCID: PMC4896019 DOI: 10.1186/s12917-016-0714-8] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Accepted: 05/30/2016] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Gastrointestinal and respiratory diseases in calves and piglets lead to significant economic losses in livestock husbandry. A high morbidity has been reported for diarrhea (calves ≤ 35%; piglets ≤ 50%) and for respiratory diseases (calves ≤ 80%; piglets ≤ 40%). Despite a highly diverse etiology and pathophysiology of these diseases, treatment with antimicrobials is often the first-line therapy. Multi-antimicrobial resistance in pathogens results in international accordance to strengthen the research in novel treatment options. Medicinal plants bear a potential as alternative or additional treatment. Based on the versatile effects of their plant specific multi-component-compositions, medicinal plants can potentially act as 'multi-target drugs'. Regarding the plurality of medicinal plants, the aim of this systematic review was to identify potential medicinal plant species for prevention and treatment of gastrointestinal and respiratory diseases and for modulation of the immune system and inflammation in calves and piglets. RESULTS Based on nine initial sources including standard textbooks and European ethnoveterinary studies, a total of 223 medicinal plant species related to the treatment of gastrointestinal and respiratory diseases was identified. A defined search strategy was established using the PRISMA statement to evaluate 30 medicinal plant species starting from 20'000 peer-reviewed articles published in the last 20 years (1994-2014). This strategy led to 418 references (257 in vitro, 84 in vivo and 77 clinical trials, thereof 48 clinical trials in veterinary medicine) to evaluate effects of medicinal plants and their efficacy in detail. The findings indicate that the most promising candidates for gastrointestinal diseases are Allium sativum L., Mentha x piperita L. and Salvia officinalis L.; for diseases of the respiratory tract Echinacea purpurea (L.) MOENCH, Thymus vulgaris L. and Althea officinalis L. were found most promising, and Echinacea purpurea (L.) MOENCH, Camellia sinensis (L.) KUNTZE, Glycyrrhiza glabra L. and Origanum vulgare L. were identified as best candidates for modulation of the immune system and inflammation. CONCLUSIONS Several medicinal plants bear a potential for novel treatment strategies for young livestock. There is a need for further research focused on gastrointestinal and respiratory diseases in calves and piglets, and the findings of this review provide a basis on plant selection for future studies.
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Affiliation(s)
- Hannah Ayrle
- Department of Livestock Sciences, Research Institute of Organic Agriculture (FiBL), Ackerstrasse 113, postbox 219, Frick, 5070, Switzerland. .,Division Veterinary Pharmacology & Toxicology, Department Clinical Research and Veterinary Public Health, Vetsuisse Faculty, University of Bern, Laenggassstrasse 124, Bern, 3012, Switzerland.
| | - Meike Mevissen
- Division Veterinary Pharmacology & Toxicology, Department Clinical Research and Veterinary Public Health, Vetsuisse Faculty, University of Bern, Laenggassstrasse 124, Bern, 3012, Switzerland
| | - Martin Kaske
- Department of Farm Animals, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 260, Zurich, 8057, Switzerland
| | - Heiko Nathues
- Department of Clinical Veterinary Medicine, Swine Clinic, Vetsuisse Faculty, University of Bern, Bremgartenstrasse 109a, Bern, 3012, Switzerland
| | - Niels Gruetzner
- Department of Clinical Veterinary Medicine, Swine Clinic, Vetsuisse Faculty, University of Bern, Bremgartenstrasse 109a, Bern, 3012, Switzerland
| | - Matthias Melzig
- Dahlem Centre of Plant Sciences, Institute of Pharmacy, Freie Universität Berlin, Koenigin-Luise-Strasse 2 + 4, Berlin, 14195, Germany
| | - Michael Walkenhorst
- Department of Livestock Sciences, Research Institute of Organic Agriculture (FiBL), Ackerstrasse 113, postbox 219, Frick, 5070, Switzerland
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Khan A, Ali NH, Santercole V, Paglietti B, Rubino S, Kazmi SU, Farooqui A. Camellia sinensis Mediated Enhancement of Humoral Immunity to Particulate and Non-particulate Antigens. Phytother Res 2016; 30:41-8. [PMID: 26478000 DOI: 10.1002/ptr.5498] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2014] [Revised: 09/22/2015] [Accepted: 09/29/2015] [Indexed: 02/05/2023]
Abstract
The most common drinking beverage in large portion of the world is Camellia sinensis (green tea). In the present study, we evaluated the adjuvant effect of green tea and tea polyphenols to particulate and non-particulate antigens. BALB/c mice were immunized with particulate and non-particulate antigens. Modulation of immunoglobulin-secreting splenocytes, IgG-mediated and IgM-mediated immunity, was evaluated by hemolytic plaque assay and enzyme-linked immunosorbent assay, respectively. Dose-dependent response of tea polyphenols was also assayed. Phenolic content was measured in crude preparations of green tea. We observed a stimulatory effect of green tea preparations on humoral immune response mediated by the increased number of antibody-secreted cells in spleen. A significant increase in IgM-mediated and IgG-mediated immune response to non-particulate antigen was also observed in green tea-treated animals. A dose-dependent adjuvant effect was seen in the case of tea polyphenols for a longer period of time compared with crude tea preparations. This study indicates polyphenols as major constituents responsible for the enhanced and sustained adjuvant activity of green tea. We suggest that tea polyphenols might be considered for real-life evaluation during adjuvant-mediated vaccination trial programs.
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Affiliation(s)
- Adnan Khan
- Immunology and Infectious Disease Research Laboratory, Department of Microbiology, University of Karachi, University Road, Karachi, 75270, Pakistan
- Division of Immunology, International Institute of Infection and Immunity, Shantou University Medical College, 22 Xinling Road, Shantou, Guangdong, 515041, China
| | - Nafisa Hassan Ali
- Immunology and Infectious Disease Research Laboratory, Department of Microbiology, University of Karachi, University Road, Karachi, 75270, Pakistan
- Dow Institute of Medical Technology, Dow University of Health Sciences, Karachi, Pakistan
| | | | - Bianca Paglietti
- Dipartimento di Scienze Biomediche, Università di Sassari, Sassari, Italy
| | - Salvatore Rubino
- Dipartimento di Scienze Biomediche, Università di Sassari, Sassari, Italy
- Department of Infection and Immunity, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Shahana Urooj Kazmi
- Immunology and Infectious Disease Research Laboratory, Department of Microbiology, University of Karachi, University Road, Karachi, 75270, Pakistan
| | - Amber Farooqui
- Immunology and Infectious Disease Research Laboratory, Department of Microbiology, University of Karachi, University Road, Karachi, 75270, Pakistan
- Division of Immunology, International Institute of Infection and Immunity, Shantou University Medical College, 22 Xinling Road, Shantou, Guangdong, 515041, China
- Dipartimento di Scienze Biomediche, Università di Sassari, Sassari, Italy
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13
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Keller SE, Stam CN, Gradl DR, Chen Z, Larkin EL, Pickens SR, Chirtel SJ. Survival of Salmonella on chamomile, peppermint, and green tea during storage and subsequent survival or growth following tea brewing. J Food Prot 2015; 78:661-7. [PMID: 25836389 DOI: 10.4315/0362-028x.jfp-14-508] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The survival of Salmonella on dried chamomile flowers, peppermint leaves, and green tea leaves stored under different conditions was examined. Survival and growth of Salmonella was also assessed after subsequent brewing using dried inoculated teas. A Salmonella enterica serovar cocktail was inoculated onto different dried tea leaves or flowers to give starting populations of approximately 10 log CFU/g. The inoculum was allowed to dry (at ambient temperature for 24 h) onto the dried leaves or flowers prior to storage under 25 and 35 °C at low (<30% relative humidity [RH]) and high (>90% RH) humidity levels. Under the four storage conditions tested, survival followed the order 25 °C with low RH > 35 °C with low RH > 25 °C with high RH > 35 °C with high RH. Salmonella losses at 25 °C with low RH occurred primarily during drying, after which populations showed little decline over 6 months. In contrast, Salmonella decreased below detection after 45 days at 35 °C and high RH in all teas tested. The thermal resistance of Salmonella was assessed at 55 °C immediately after inoculation of tea leaves or flowers, after drying (24 h) onto tea leaves or flowers, and after 28 days of storage at 25 °C with low RH. All conditions resulted in similar D-values (2.78 ± 0.12, 3.04 ± 0.07, and 2.78 ± 0.56, at 0 h, 24 h, and 28 days, respectively), indicating thermal resistance of Salmonella in brewed tea did not change after desiccation and 28 days of storage. In addition, all brewed teas tested supported the growth of Salmonella. If Salmonella survives after storage, it may also survive and grow after a home brewing process.
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Affiliation(s)
- Susanne E Keller
- Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, Bedford Park, Illinois 60501, USA.
| | - Christina N Stam
- Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, Bedford Park, Illinois 60501, USA
| | - Dana R Gradl
- Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, Bedford Park, Illinois 60501, USA
| | - Zhengzai Chen
- Institute of Food Safety and Health, Illinois Institute of Technology, 6502 South Archer Avenue, Bedford Park, Illinois 60501, USA
| | - Emily L Larkin
- Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, Bedford Park, Illinois 60501, USA; Center for Medical Mycology, 11100 Euclid Avenue, LKS-5028, Cleveland, OH 44106-5028, USA
| | - Shannon R Pickens
- Institute of Food Safety and Health, Illinois Institute of Technology, 6502 South Archer Avenue, Bedford Park, Illinois 60501, USA
| | - Stuart J Chirtel
- Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, College Park, Maryland 20740, USA
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14
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Hayat K, Iqbal H, Malik U, Bilal U, Mushtaq S. Tea and Its Consumption: Benefits and Risks. Crit Rev Food Sci Nutr 2015; 55:939-54. [DOI: 10.1080/10408398.2012.678949] [Citation(s) in RCA: 131] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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15
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Abstract
Green tea is a popular drink, especially in Asian countries, although its popularity continues to spread across the globe. The health benefits of green tea, derived from the leaves of the Camellia sinensis plant, have been studied for many years. Fairly recently, researchers have begun to look at the possibility of using green tea in antimicrobial therapy, and the potential prevention of infections. The particular properties of catechins found in the tea have shown promise for having antimicrobial effects. There are four main catechins (polyphenols) found in green tea: (-)-epicatechin (EC), (-)-epicatechin-3-gallate (ECG), (-)-epigallocatechin (EGC), and (-)-epigallocatechin-3-gallate (EGCG). Three of these, ECG, EGC, and EGCG have been shown to have antimicrobial effects against a variety of organisms. These catechins have exhibited a variety of antimicrobial mechanisms. The results of studies on the antimicrobial effects of green tea have shown that the potential for preventive and therapeutic purposes is present. Further data collection on studies performed with human consumption during the course of infections, and studies on the occurrence of infections in populations that consume regular amounts of green tea will be necessary to complete the picture of its antimicrobial possibilities.
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Affiliation(s)
- Wanda C Reygaert
- Department of Biomedical Sciences, Oakland University William Beaumont School of Medicine Rochester, MI, USA
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16
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Bansal S, Choudhary S, Sharma M, Kumar SS, Lohan S, Bhardwaj V, Syan N, Jyoti S. Tea: A native source of antimicrobial agents. Food Res Int 2013. [PMCID: PMC7126541 DOI: 10.1016/j.foodres.2013.01.032] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Tea (Camellia sinensis) is one of the most popular nonalcoholic beverages, consumed by over two-thirds of the world's population because of its refreshing, mild stimulant and medicinal properties. It is processed in different ways in different parts of the world to give green, black, oolong, and pu-erh tea. Among all tea polyphenols, epigallocatechin-3-gallate has been responsible for much of the health promoting abilities of tea including anti-inflammatory, antimicrobial, antitumour, anti-oxidative, protection from cardiovascular disease, anti-obesity, and anti-aging properties. In the present review, the antibacterial, antiviral, and antifungal activities of different types of tea and their polyphenols are reported, highlighting their mechanisms of action and structure–activity relationship. Moreover, considering that the changing patterns of infectious diseases and the emergence of microbial strains resistant to current antibiotics, there is an urgent need to find out new potent antimicrobial agents as adjuvants to antibiotic therapy. The synergistic effect of tea polyphenols in combination with conventional antimicrobial agents against clinical multidrug-resistant microorganisms has also been discussed in this review.
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Affiliation(s)
- Sumit Bansal
- Department of Pharmacy, Jaypee University of Information Technology, Waknaghat, Himachal Pradesh, India
- Corresponding author. Tel.: + 91 1792 239219; fax: + 91 1792 245362.
| | - Shivani Choudhary
- Department of Pharmaceutical Chemistry, Manipal College of Pharmaceutical Sciences, Manipal, Karnataka, India
| | - Manu Sharma
- Department of Pharmacy, Jaypee University of Information Technology, Waknaghat, Himachal Pradesh, India
| | - Suthar Sharad Kumar
- Department of Pharmacy, Jaypee University of Information Technology, Waknaghat, Himachal Pradesh, India
| | - Sandeep Lohan
- Department of Pharmacy, Jaypee University of Information Technology, Waknaghat, Himachal Pradesh, India
| | - Varun Bhardwaj
- Department of Pharmacy, Jaypee University of Information Technology, Waknaghat, Himachal Pradesh, India
| | - Navneet Syan
- Department of Pharmaceutical Chemistry, Ganpati Institute of Pharmacy, Bilaspur, Haryana, India
| | - Saras Jyoti
- Department of Biotechnology & Bioinformatics, Jaypee University of Information Technology, Waknaghat, Himachal Pradesh, India
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17
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Kemperman RA, Gross G, Mondot S, Possemiers S, Marzorati M, Van de Wiele T, Doré J, Vaughan EE. Impact of polyphenols from black tea and red wine/grape juice on a gut model microbiome. Food Res Int 2013. [DOI: 10.1016/j.foodres.2013.01.034] [Citation(s) in RCA: 156] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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18
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Survivability of Vibrio choleraeO1 in Cooked Rice, Coffee, and Tea. INTERNATIONAL JOURNAL OF FOOD SCIENCE 2013; 2013:581648. [PMID: 26904604 PMCID: PMC4745536 DOI: 10.1155/2013/581648] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Accepted: 07/01/2013] [Indexed: 11/18/2022]
Abstract
This study aimed to investigate the survival ofVibrio choleraeO1 in 3 types of preparation for cooked rice,Oryza sativaL., (plain rice, rice with coconut milk, and rice with ginger); coffee,Coffea canephora, (plain coffee, coffee with sugar, and coffee with sweetened condensed milk); and tea,Camellia sinensis, (plain tea, tea with sugar, and tea with sweetened condensed milk) held at room temperature (27°C). The survival ofV. choleraeO1 was determined by spread plate method on TCBS agar. Initial cultures of 8.00 log CFU/mL were inoculated into each food sample. After 6 h incubation, significant growth was only detected in rice with coconut milk (9.67 log CFU/mL;P<0.05). However, all 3 types of rice preparation showed significant growth ofV. choleraeafter 24 h (P<0.05). For coffee and tea preparations,V. choleraesurvived up to 6 h in tea with condensed milk (4.72 log CFU/mL) but not in similar preparation of coffee. This study showed evidence for the survivability ofV. choleraein rice, coffee, and tea. Thus, holding these food and beverages for an extended period of time at room temperature should be avoided.
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19
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Growth stimulation/inhibition effect of medicinal plants on human intestinal microbiota. Food Sci Biotechnol 2012. [DOI: 10.1007/s10068-012-0096-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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20
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Burris KP, Davidson PM, Stewart CN, Zivanovic S, Harte FM. Aqueous extracts of yerba mate (Ilex paraguariensis) as a natural antimicrobial against Escherichia coli O157:H7 in a microbiological medium and pH 6.0 apple juice. J Food Prot 2012; 75:753-7. [PMID: 22488066 DOI: 10.4315/0362-028x.jfp-11-214] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Ilex paraguariensis is popularly used in the preparation of a tea infusion (yerba mate), most commonly produced and consumed in the South American countries of Uruguay, Paraguay, Argentina, and Brazil. In this study, aqueous extracts of commercial tea, derived from the holly plant species I. paraguariensis were evaluated for their ability to inhibit or inactivate Escherichia coli O157:H7 in a microbiological medium and modified apple juice. Dialyzed, lyophilized aqueous extracts were screened for antimicrobial activity against E. coli O157:H7 strains ATCC 43894 and 'Cider' in tryptic soy broth (TSB) and apple juice (adjusted to pH 6.0 to allow for growth of the bacterium). A mixture of the two strains was used as the inoculum when apple juice was used as the medium. MBCs were determined to be ca. 5 and 10 mg/ml for ATCC 43894 and 'Cider', respectively, in TSB. Higher concentrations of the extract were required to inactivate E. coli O157:H7 in pH-adjusted apple juice. An approximate 4.5-log reduction was observed for E. coli O157:H7 treated with 40 mg/ml extract. It was concluded that aqueous extracts from commercial yerba mate have potential to be used as antimicrobials in foods and beverages against pathogenic E. coli O157:H7.
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Affiliation(s)
- Kellie P Burris
- Department of Food Science and Technology, University of Tennessee-Knoxville, Knoxville, TN 37996-4591, USA
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21
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Faria RL, Cardoso LML, Akisue G, Pereira CA, Junqueira JC, Jorge AOC, Santos Júnior PV. Antimicrobial activity of Calendula officinalis, Camellia sinensis and chlorhexidine against the adherence of microorganisms to sutures after extraction of unerupted third molars. J Appl Oral Sci 2012; 19:476-82. [PMID: 21986652 PMCID: PMC3984193 DOI: 10.1590/s1678-77572011000500007] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2009] [Accepted: 10/26/2010] [Indexed: 11/30/2022] Open
Abstract
Objective The objective of this study was to compare the antimicrobial effect of mouthwashes
containing Calendula officinalis L., Camellia
sinensis (L.) Kuntze and 0.12% chlorhexidine digluconate on the
adherence of microorganisms to suture materials after extraction of unerupted
third molars. Material and Methods Eighteen patients with unerupted maxillary third molars indicated for extraction
were selected (n=6 per mouthwash). First, the patients were subjected to
extraction of the left tooth and instructed not to use any type of antiseptic
solution at the site of surgery (control group). After 15 days, the right tooth
was extracted and the patients were instructed to use the Calendula
officinalis, Camellia sinensis or chlorhexidine mouthwash during 1
week (experimental group). For each surgery, the sutures were removed on
postoperative day 7 and placed in sterile phosphate-buffered saline. Next, serial
dilutions were prepared and seeded onto different culture media for the growth of
the following microorganisms: blood agar for total microorganism growth; Mitis
Salivarius bacitracin sucrose agar for mutans group streptococci; mannitol agar
for Staphylococcus spp.; MacConkey agar for enterobacteria and
Pseudomonas spp., and Sabouraud dextrose agar containing
chloramphenicol for Candida spp. The plates were incubated during
24-48 h at 37ºC for microorganism count (CFU/mL). Results The three mouthwashes tested reduced the number of microorganisms adhered to the
sutures compared to the control group. However, significant differences between
the control and experimental groups were only observed for the mouthwash
containing 0.12% chlorhexidine digluconate. Conclusions Calendula officinalis L. and Camellia sinensis
(L.) Kuntze presented antimicrobial activity against the adherence of
microorganisms to sutures but were not as efficient as chlorhexidine
digluconate.
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Affiliation(s)
- Raquel Lourdes Faria
- São José dos Campos Dental School, Univ. Estadual Paulista, São José dos Campos, SP
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22
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Abstract
PURPOSE Hot tea and coffee have been found to have antimicrobial properties. The purpose of this study was to determine whether the consumption of tea, coffee, or both is associated with less frequent nasal carriage of methicillin-resistant Staphylococcus aureus (MRSA). METHODS We performed a secondary analysis of data from the 2003-2004 National Health and Nutrition Examination Survey to investigate the relationship between the consumption of coffee, hot tea, cold tea, and soft drinks, and MRSA nasal carriage among the noninstitutionalized population of the United States. RESULTS An estimated 2.5 million persons (1.4% of the population) were MRSA nasal carriers. In an adjusted logistic regression analysis controlling for age, race, sex, poverty-income ratio, current health status, hospitalization in the past 12 months, and use of antibiotics in the past month, individuals who reported consuming hot tea were one-half as likely to have MRSA nasal carriage relative to individuals who drank no hot tea (odds ratio = 0.47; 95% confidence interval, 0.31-0.71). Similarly, individuals who reported consuming coffee had about a one-half reduction in the risk of MRSA nasal carriage relative to individuals who drank no coffee (odds ratio = 0.47; 95% confidence interval, 0.24-0.93). CONCLUSIONS Consumption of hot tea or coffee is associated with a lower likelihood of MRSA nasal carriage. Our findings raise the possibility of a promising new method to decrease MRSA nasal carriage that is safe, inexpensive, and easily accessible.
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Affiliation(s)
- Eric M Matheson
- Department of Family Medicine, Medical University of South Carolina, Charleston, South Carolina, USA.
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23
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Assessment of antibacterial activity of fractions from burdock leaf against food-related bacteria. Food Control 2010. [DOI: 10.1016/j.foodcont.2010.02.016] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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24
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Liu HM, Guo JH, Cheng YJ, Liu P, Long CA, Deng BX. Inhibitory activity of tea polyphenol and Hanseniaspora uvarum against Botrytis cinerea infections. Lett Appl Microbiol 2010; 51:258-63. [PMID: 20633212 DOI: 10.1111/j.1472-765x.2010.02888.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
AIMS To investigate the effect of tea polyphenol (TP) and Hanseniaspora uvarum alone or in combination against Botrytis cinerea in grapes and to evaluate the possible mechanisms involved. METHODS AND RESULTS TP alone was effective in controlling grey mould in grape at all concentrations. TP at 0.5 and 1.0% in combination with H. uvarum (1 x 10(6) CFU ml(-1)) showed a lower infection rate of grey mould. TP at 0.01% or above significantly inhibited the spore germination of B. cinerea. TP at 0.1% showed inhibition ability on mycelium growth of B. cinerea. The addition of TP did not affect the growth of H. uvarum in vitro and significantly increased the population of H. uvarum in vivo. CONCLUSIONS TP exhibited an inhibitory effect against B. cinerea and improved the biocontrol efficacy of H. uvarum. The inhibitory effects of spore germination and mycelial growth of B. cinerea and the increased populations of H. uvarum in vivo may be some of the important mechanisms of TP. SIGNIFICANCE AND IMPACT OF THE STUDY The results suggested that TP alone or in combination with biocontrol agents has great potential in the commercial management of postharvest diseases of fruits.
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Affiliation(s)
- H M Liu
- National Centre of Citrus Breeding, Key Laboratory of Horticultural Plant Biology of Ministry of Education, Huazhong Agriculture University, Wuhan, Hubei, China
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25
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Liu HM, Guo JH, Liu P, Cheng YJ, Wang BQ, Long CA, Deng BX. Inhibitory activity of tea polyphenol and Candida ernobii against Diplodia natalensis infections. J Appl Microbiol 2009; 108:1066-1072. [PMID: 19796126 DOI: 10.1111/j.1365-2672.2009.04511.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
AIMS To investigate the effect of tea polyphenol (TP) and Candida ernobii alone or in combination against postharvest disease (Diplodia natalensis) in citrus fruit and to evaluate the possible mechanisms involved. METHODS AND RESULTS TP at concentrations of 0.1%, 0.5% and 1.0% alone, or in combination with C. ernobii (1x10(6) CFU ml(-1)), showed a lower infection rate of stem-end rot. TP at the concentration of 0.5% or above significantly inhibited the spore germination of D. natalensis. TP at the concentration of 1.0% showed inhibitary ability on mycelium growth of D. natalensis. The addition of TP did not affect the growth of C. ernobii in vitro and significantly increased the population of C. ernobii in vivo. CONCLUSIONS TP exhibited an inhibitory effect against D. natalensis and improved the biocontrol efficacy of C. ernobii. It was direct because of the inhibitory effects of TP on spore germination and mycelial growth of D. natalensis in vitro and indirect because of the increased populations of C. ernobii in vivo. SIGNIFICANCE AND IMPACT OF THE STUDY The results suggested that TP alone or in combination with biocontrol agents has great potential in commercial management of postharvest diseases in fruits.
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Affiliation(s)
- H M Liu
- National Centre of Citrus Breeding, Key Laboratory of Horticultural Plant Biology of Ministry of Education, Huazhong Agriculture University, Wuhan, Hubei, China
| | - J H Guo
- National Centre of Citrus Breeding, Key Laboratory of Horticultural Plant Biology of Ministry of Education, Huazhong Agriculture University, Wuhan, Hubei, China
| | - P Liu
- National Centre of Citrus Breeding, Key Laboratory of Horticultural Plant Biology of Ministry of Education, Huazhong Agriculture University, Wuhan, Hubei, China
| | - Y J Cheng
- National Centre of Citrus Breeding, Key Laboratory of Horticultural Plant Biology of Ministry of Education, Huazhong Agriculture University, Wuhan, Hubei, China
| | - B Q Wang
- National Centre of Citrus Breeding, Key Laboratory of Horticultural Plant Biology of Ministry of Education, Huazhong Agriculture University, Wuhan, Hubei, China
| | - C A Long
- National Centre of Citrus Breeding, Key Laboratory of Horticultural Plant Biology of Ministry of Education, Huazhong Agriculture University, Wuhan, Hubei, China
| | - B X Deng
- National Centre of Citrus Breeding, Key Laboratory of Horticultural Plant Biology of Ministry of Education, Huazhong Agriculture University, Wuhan, Hubei, China
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26
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Neyestani TR, Khalaji N, Gharavi A. Black and green teas may have selective synergistic or antagonistic effects on certain antibiotics againstStreptococcus pyogenesin vitro. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/13590840701703934] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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27
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Lee KM, Kim WS, Lim J, Nam S, Youn M, Nam SW, Kim Y, Kim SH, Park W, Park S. Antipathogenic properties of green tea polyphenol epigallocatechin gallate at concentrations below the MIC against enterohemorrhagic Escherichia coli O157:H7. J Food Prot 2009; 72:325-31. [PMID: 19350976 DOI: 10.4315/0362-028x-72.2.325] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The inhibitory effects of green tea polyphenol epigallocatechin gallate (EGCG) on virulence phenotypes and gene expression regulated by quorum sensing (QS) in Escherichia coli O157:H7 were demonstrated at concentrations of 1 to 100 microg/ml, which are lower than the MIC (539 +/- 22 microg/ml). At 25 microg/ml, the growth rate was not affected, but autoinducer 2 concentration, biofilm formation, and swarm motility decreased to 13.2, 11.8, and 50%, respectively. Survival at 5 days of nematodes (Caenorhabditis elegans) that were fed the pathogen without and with EGCG were 47.1 and 76%, respectively. Real-time PCR data indicated decreased transcriptional level in many quorum sensing-regulated virulence genes at 25 microg/ml. Our results suggest that EGCG at concentrations below itsMIC has significant antipathogenic effects against E. coli O157:H7.
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Affiliation(s)
- Kang-Mu Lee
- Department Chemistry and Nano Sciences (BK21), Ewha Womans University, Seoul 120-750, Korea
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28
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Mo H, Zhu Y, Chen Z. Microbial fermented tea – a potential source of natural food preservatives. Trends Food Sci Technol 2008. [DOI: 10.1016/j.tifs.2007.10.001] [Citation(s) in RCA: 105] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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29
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Arshad N, Neubauer C, Hasnain S, Hess M. Peganum harmala Can Minimize Escherichia coli Infection in Poultry, but Long-Term Feeding May Induce Side Effects. Poult Sci 2008; 87:240-9. [DOI: 10.3382/ps.2007-00341] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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30
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Neyestani TR, Khalaji N, Gharavi A. Selective Microbiologic Effects of Tea Extract on Certain Antibiotics Against Escherichia coli In Vitro. J Altern Complement Med 2007; 13:1119-24. [DOI: 10.1089/acm.2007.7033] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Tirang R. Neyestani
- Laboratory of Nutrition Research, National Nutrition and Food Technology Research Institute, Shaheed Beheshti Medical University, Tehran, Iran
| | - Niloufar Khalaji
- Laboratory of Nutrition Research, National Nutrition and Food Technology Research Institute, Shaheed Beheshti Medical University, Tehran, Iran
| | - A'Azam Gharavi
- Laboratory of Nutrition Research, National Nutrition and Food Technology Research Institute, Shaheed Beheshti Medical University, Tehran, Iran
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31
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Khan N, Mukhtar H. Tea polyphenols for health promotion. Life Sci 2007; 81:519-33. [PMID: 17655876 PMCID: PMC3220617 DOI: 10.1016/j.lfs.2007.06.011] [Citation(s) in RCA: 651] [Impact Index Per Article: 38.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2007] [Revised: 06/01/2007] [Accepted: 06/18/2007] [Indexed: 02/08/2023]
Abstract
People have been consuming brewed tea from the leaves of the Camellia sinensis plant for almost 50 centuries. Although health benefits have been attributed to tea, especially green tea consumption since the beginning of its history, scientific investigations of this beverage and its constituents have been underway for less than three decades. Currently, tea, in the form of green or black tea, next to water, is the most widely consumed beverage in the world. In vitro and animal studies provide strong evidence that polyphenols derived from tea may possess the bioactivity to affect the pathogenesis of several chronic diseases. Among all tea polyphenols, epigallocatechin-3-gallate has been shown to be responsible for much of the health promoting ability of green tea. Tea and tea preparations have been shown to inhibit tumorigenesis in a variety of animal models of carcinogenesis. However, with increasing interest in the health promoting properties of tea and a significant rise in scientific investigation, this review covers recent findings on the medicinal properties and health benefits of tea with special reference to cancer and cardiovascular diseases.
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Affiliation(s)
| | - Hasan Mukhtar
- Author for correspondence: Hasan Mukhtar, Ph.D., Helfaer Professor of Cancer Research, Director and Vice Chair of Research, Department of Dermatology, University of Wisconsin-Madison, 1300, University Avenue, Medical Sciences Center, B-25, Madison, WI, 53706., Phone: 608-263-3927, Fax: 608-263-5223,
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Friedman M. Overview of antibacterial, antitoxin, antiviral, and antifungal activities of tea flavonoids and teas. Mol Nutr Food Res 2007; 51:116-34. [PMID: 17195249 PMCID: PMC7168386 DOI: 10.1002/mnfr.200600173] [Citation(s) in RCA: 382] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2006] [Revised: 10/20/2006] [Indexed: 12/17/2022]
Abstract
Tea leaves produce organic compounds that may be involved in the defense of the plants against invading pathogens including insects, bacteria, fungi, and viruses. These metabolites include polyphenolic compounds, the six so-called catechins, and the methyl-xanthine alkaloids caffeine, theobromine, and theophylline. Postharvest inactivation of phenol oxidases in green tea leaves prevents oxidation of the catechins, whereas postharvest enzyme-catalyzed oxidation (fermentation) of catechins in tea leaves results in the formation of four theaflavins as well as polymeric thearubigins. These substances impart the black color to black teas. Black and partly fermented oolong teas contain both classes of phenolic compounds. A need exists to develop a better understanding of the roles of polyphenolic tea compounds in food and medical microbiology. This overview surveys and interprets our present knowledge of activities of tea flavonoids and teas against foodborne and other pathogenic bacteria, virulent protein toxins produced by some of the bacteria, virulent bacteriophages, pathogenic viruses and fungi. Also covered are synergistic, mechanistic, and bioavailability aspects of the antimicrobial effects. Further research is suggested for each of these categories. The herein described findings are not only of fundamental interest, but also have practical implications for nutrition, food safety, and animal and human health.
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Affiliation(s)
- Mendel Friedman
- Western Regional Research Center, Agricultural Research Service, United States Department of Agriculture, Albany, CA, USA.
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