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Mandal MK, Domb AJ. Antimicrobial Activities of Natural Bioactive Polyphenols. Pharmaceutics 2024; 16:718. [PMID: 38931842 PMCID: PMC11206801 DOI: 10.3390/pharmaceutics16060718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2024] [Revised: 05/21/2024] [Accepted: 05/24/2024] [Indexed: 06/28/2024] Open
Abstract
Secondary metabolites, polyphenols, are widespread in the entire kingdom of plants. They contain one or more hydroxyl groups that have a variety of biological functions in the natural environment. These uses include polyphenols in food, beauty products, dietary supplements, and medicinal products and have grown rapidly during the past 20 years. Antimicrobial polyphenols are described together with their sources, classes, and subclasses. Polyphenols are found in different sources, such as dark chocolate, olive oil, red wine, almonds, cashews, walnuts, berries, green tea, apples, artichokes, mushrooms, etc. Examples of benefits are antiallergic, antioxidant, anticancer agents, anti-inflammatory, antihypertensive, and antimicrobe properties. From these sources, different classes of polyphenols are helpful for the growth of internal functional systems of the human body, providing healthy fats, vitamins, and minerals, lowering the risk of cardiovascular diseases, improving brain health, and rebooting our cellular microbiome health by mitochondrial uncoupling. Among the various health benefits of polyphenols (curcumin, naringenin, quercetin, catechin, etc.) primarily different antimicrobial activities are discussed along with possible future applications. For polyphenols and antimicrobial agents to be proven safe, adverse health impacts must be substantiated by reliable scientific research as well as in vitro and in vivo clinical data. Future research may be influenced by this evaluation.
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Affiliation(s)
| | - Abraham J. Domb
- The Alex Grass Center for Drug Design & Synthesis and the Center for Cannabis Research, School of Pharmacy, Institute of Drug Research, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 9112001, Israel;
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Antón-Domínguez BI, López-Moral A, Romero-Salguero FJ, Trapero A, Trapero C, Agustí-Brisach C. Bioprotection of Olive Trees Against Verticillium Wilt by Pomegranate and Carob Extracts. PLANT DISEASE 2024; 108:1073-1082. [PMID: 37933148 DOI: 10.1094/pdis-09-23-1770-re] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
Bioprotection through the use of plant extracts is an environmentally friendly strategy in crop protection. Effective control of Verticillium wilt of olive (Olea europaea; VWO), caused by Verticillium dahliae, has proven challenging because of the ineffectiveness of chemicals, which makes it necessary to search for new control tools. Thus, the aim of this study was to evaluate the effect of pomegranate (Punica granatum) and carob (Ceratonia siliqua) extracts on VWO. Extracts derived from pomegranate peels and carob pods and leaves were obtained using ethanol, methanol, or ethyl acetate as a solvent. A targeted analysis of their metabolite composition was performed using QTRAP ultrahigh-performance liquid chromatography with mass spectrometry. Remarkably, gallic acid was detected in all extracts at a high concentration. The effect of the extracts on the mycelial growth and on the germination of conidia and microsclerotia of V. dahliae was evaluated by in vitro sensitivity tests at various doses: 0 (control), 3, 30, 300, and 3,000 mg of extract/liter. Extracts obtained with ethanol or methanol significantly reduced the viability of V. dahliae structures when applied at the highest dose, while those obtained with ethyl acetate were ineffective across all doses. The most effective extracts, as determined in vitro, were then evaluated against the disease in olive plants. Potted plants of the cultivar Picual were treated by spraying (foliar application) or irrigation (root application) of extracts at 3,000 mg/liter, followed by inoculation with V. dahliae. The results indicated that foliar applications were ineffective, while root treatments with pomegranate peel or carob leaf extracts were more effective in reducing disease severity, regardless of the solvent, compared with that of the untreated control.
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Affiliation(s)
- Begoña I Antón-Domínguez
- Departamento de Agronomía (Unit of Excellence 'María de Maeztu' 2020-2024), ETSIAM, Universidad de Córdoba, Campus de Rabanales, Edificio Celestino Mutis, 14071 Córdoba, Spain
| | - Ana López-Moral
- Departamento de Agronomía (Unit of Excellence 'María de Maeztu' 2020-2024), ETSIAM, Universidad de Córdoba, Campus de Rabanales, Edificio Celestino Mutis, 14071 Córdoba, Spain
| | - Francisco J Romero-Salguero
- Departamento de Química Orgánica, Instituto Químico para la Energía y el Medioambiente (IQUEMA), Facultad de Ciencias, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie, E-14071 Córdoba, Spain
| | - Antonio Trapero
- Departamento de Agronomía (Unit of Excellence 'María de Maeztu' 2020-2024), ETSIAM, Universidad de Córdoba, Campus de Rabanales, Edificio Celestino Mutis, 14071 Córdoba, Spain
| | - Carlos Trapero
- Departamento de Agronomía (Unit of Excellence 'María de Maeztu' 2020-2024), ETSIAM, Universidad de Córdoba, Campus de Rabanales, Edificio Celestino Mutis, 14071 Córdoba, Spain
| | - Carlos Agustí-Brisach
- Departamento de Agronomía (Unit of Excellence 'María de Maeztu' 2020-2024), ETSIAM, Universidad de Córdoba, Campus de Rabanales, Edificio Celestino Mutis, 14071 Córdoba, Spain
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Falsini S, Nieri T, Paolini A, Schiff S, Papini A, Mugnai L, Gonnelli C, Ristori S. Tannins-lignin mixed nanoformulations for improving the potential of neem oil as fungicide agent. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:39131-39141. [PMID: 36595170 DOI: 10.1007/s11356-022-24991-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 12/22/2022] [Indexed: 06/17/2023]
Abstract
Sustainability and circular economy are increasingly pushing for the search of natural materials to foster antiparasitic treatments, especially in the case of economically relevant agricultural cultivations, such as grapevine. In this work, we propose to deliver neem oil, a natural biopesticide loaded into novel nanovectors (nanocapsules) which were fabricated using a scalable procedure starting from Kraft lignin and grapeseed tannins. The obtained formulations were characterized in terms of size and Zeta potential, showing that almost all the nanocapsules had size in the suitable range for delivery purposes (mean diameter 150-300 nm), with low polydispersity and sufficient stability to ensure long shelf life. The target microorganisms were three reference fungal pathogens of grapevine (Botrytis cinerea, Phaeoacremonium minimum, Phaeomoniella chlamydospora), responsible for recurrent diseases on this crop: grey mold or berry rot by B. cinerea and diseases of grapevine wood within the Esca complex of diseases. Results showed that grapeseed tannins did not promote inhibitory effects, either alone or in combination with Kraft lignin. On the contrary, the efficacy of neem oil against P. minimum was boosted by more than 1-2 orders of magnitude and the parasite growth inhibition was higher with respect to a widely used commercial pesticide, while no additional activity was detected against P. chlamydospora and B. cinerea.
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Affiliation(s)
- Sara Falsini
- Department of Biology, University of Florence, via Micheli 1-3, 50121, Florence, Italy.
| | - Tommaso Nieri
- Department of Biology, University of Florence, via Micheli 1-3, 50121, Florence, Italy
- Department of Agricultural, Food, Environmental and Forestry Science and Technology (DAGRI), Plant Pathology and Entomology Section, University of Florence, P.le delle Cascine, 28, 50144, Florence, Italy
| | - Aurora Paolini
- Department of Agricultural, Food, Environmental and Forestry Science and Technology (DAGRI), Plant Pathology and Entomology Section, University of Florence, P.le delle Cascine, 28, 50144, Florence, Italy
| | - Silvia Schiff
- Department of Biology, University of Florence, via Micheli 1-3, 50121, Florence, Italy
| | - Alessio Papini
- Department of Biology, University of Florence, via Micheli 1-3, 50121, Florence, Italy
| | - Laura Mugnai
- Department of Agricultural, Food, Environmental and Forestry Science and Technology (DAGRI), Plant Pathology and Entomology Section, University of Florence, P.le delle Cascine, 28, 50144, Florence, Italy
| | - Cristina Gonnelli
- Department of Biology, University of Florence, via Micheli 1-3, 50121, Florence, Italy
| | - Sandra Ristori
- Department of Chemistry "Ugo Schiff" & CSGI, University of Florence, 50019, Florence, Sesto Fiorentino, Italy
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Celiksoy V, Moses RL, Sloan AJ, Moseley R, Heard CM. Synergistic activity of pomegranate rind extract and Zn (II) against Candida albicans under planktonic and biofilm conditions, and a mechanistic insight based upon intracellular ROS induction. Sci Rep 2022; 12:19560. [PMID: 36379967 PMCID: PMC9666354 DOI: 10.1038/s41598-022-21995-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 10/07/2022] [Indexed: 11/16/2022] Open
Abstract
Candida albicans (C. albicans) is an opportunistic pathogen, which causes superficial infection and can lead to mortal systemic infections, especially in immunocompromised patients. The incidence of C. albicans infections is increasing and there are a limited number of antifungal drugs used in treatment. Therefore, there is an urgent need for new and alternative antifungal drugs. Pomegranate rind extract (PRE) is known for its broad-spectrum antimicrobial activities, including against C. albicans and recently, PRE and Zn (II) have been shown to induce synergistic antimicrobial activity against various microbes. In this study, the inhibitory activities of PRE, Zn (II) and PRE in combination with Zn (II) were evaluated against C. albicans. Antifungal activities of PRE and Zn (II) were evaluated using conventional microdilution methods and the interaction between these compounds was assessed by in vitro checkerboard and time kill assays in planktonic cultures. The anti-biofilm activities of PRE, Zn (II) and PRE in combination with Zn (II) were assessed using confocal laser scanning microscopy, with quantitative analysis of biofilm biomass and mean thickness analysed using COMSTAT2 analysis. In addition, antimicrobial interactions between PRE and Zn (II) were assayed in terms reactive oxygen species (ROS) production by C. albicans. PRE and Zn (II) showed a potent antifungal activity against C. albicans, with MIC values of 4 mg/mL and 1.8 mg/mL, respectively. PRE and Zn (II) in combination exerted a synergistic antifungal effect, as confirmed by the checkerboard and time kill assays. PRE, Zn (II) and PRE and Zn (II) in combination gave rise to significant reductions in biofilm biomass, although only PRE caused a significant reduction in mean biofilm thickness. The PRE and Zn (II) in combination caused the highest levels of ROS production by C. albicans, in both planktonic and biofilm forms. The induction of excess ROS accumulation in C. albicans may help explain the synergistic activity of PRE and Zn (II) in combination against C. albicans in both planktonic and biofilm forms. Moreover, the data support the potential of the PRE and Zn (II) combination as a novel potential anti-Candida therapeutic system.
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Affiliation(s)
- Vildan Celiksoy
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff, UK
- School of Dentistry, Cardiff University, Cardiff, UK
| | - Rachael L Moses
- Faculty of Medicine, Dentistry and Health Sciences, Melbourne Dental School, University of Melbourne, Parkville, VIC, Australia
| | - Alastair J Sloan
- Faculty of Medicine, Dentistry and Health Sciences, Melbourne Dental School, University of Melbourne, Parkville, VIC, Australia
| | - Ryan Moseley
- School of Dentistry, Cardiff University, Cardiff, UK
| | - Charles M Heard
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff, UK.
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Liu H, Zhu W, Cao Y, Gao J, Jin T, Qin N, Xia X. Punicalagin inhibits biofilm formation and virulence gene expression of Vibrio parahaemolyticus. Food Control 2022. [DOI: 10.1016/j.foodcont.2022.109045] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Kumar N, Pratibha, Neeraj, Sami R, Khojah E, Aljahani AH, Al-Mushhin AAM. Effects of drying methods and solvent extraction on quantification of major bioactive compounds in pomegranate peel waste using HPLC. Sci Rep 2022; 12:8000. [PMID: 35568719 PMCID: PMC9107484 DOI: 10.1038/s41598-022-11881-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 04/20/2022] [Indexed: 12/24/2022] Open
Abstract
Bioactive compound characterization is an essential step for utilizing pomegranate peel waste as food and nutraceuticals ingredients. In the present investigation, the effects of different drying methods (freeze, tray-oven, and sun) and extraction solvents such as methanol, ethanol, water, acetone, and hexane were investigated on the extraction and recovery of major bioactive compounds (ellagic acid, gallic acid, quercetin, and punicalagin) of pomegranate peel for two pomegranate varieties (i.e., Bhagwa and Ganesh) using high-performance liquid chromatography (HPLC). The results indicated that the freeze dried pomegranate peel powder of both pomegranate varities potential to extraction higher amount of bioactive compounds with methanol as extraction solvent as compared to other drying methods and solvents. Freeze-dried peel powder of Bhagwa pomegranate showed a higher amount of gallic acid (32.2 mg/g), ellagic acid (13.6 mg/g), punicalagin (15.2 mg/g), and quercetin (2.5 mg/g) with methanol solvent as compared to the other extract of Bhagwa and Ganesh varieties. The basis on the results of the current study, it can be concluded that the freeze-drying method of drying pomegranate peel powder and methanol as an extraction solvent are effective to recover higher amounts of bioactive compounds that can be utilized in food and pharmaceutical sectors at commercial scale.
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Affiliation(s)
- Nishant Kumar
- National Institute of Food Technology Entrepreneurship and Management (NIFTEM), Plot No. 97, Sector- 56, HSIIDC, Industrial Estate, Kundli, Sonipat, Haryana, 131028, India
| | - Pratibha
- National Institute of Food Technology Entrepreneurship and Management (NIFTEM), Plot No. 97, Sector- 56, HSIIDC, Industrial Estate, Kundli, Sonipat, Haryana, 131028, India.,National Institute of Technology Delhi, Plot No. FA7, Zone, P1, GT Karnal Road, Delhi, 110036, India
| | - Neeraj
- National Institute of Food Technology Entrepreneurship and Management (NIFTEM), Plot No. 97, Sector- 56, HSIIDC, Industrial Estate, Kundli, Sonipat, Haryana, 131028, India.
| | - Rokayya Sami
- Department of Food Science and Nutrition, College of Sciences, Taif University, P.O. 11099, Taif, 21944, Saudi Arabia.
| | - Ebtihal Khojah
- Department of Food Science and Nutrition, College of Sciences, Taif University, P.O. 11099, Taif, 21944, Saudi Arabia
| | - Amani H Aljahani
- Department of Physical Sport Science, College of Education, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh, 11671, Saudi Arabia
| | - Amina A M Al-Mushhin
- Department of Biology, College of Science and Humanities in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-Kharj, 11942, Saudi Arabia
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Pomegranate trees quality under drought conditions using potassium silicate, nanosilver, and selenium spray with valorization of peels as fungicide extracts. Sci Rep 2022; 12:6363. [PMID: 35430590 PMCID: PMC9013366 DOI: 10.1038/s41598-022-10354-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Accepted: 03/31/2022] [Indexed: 12/25/2022] Open
Abstract
The current study was performed on 8 years old "Succary" pomegranate cultivar (Punica granatum L.) during the 2019 and 2020 seasons. One hundred pomegranate trees were chosen and sprayed three times at the beginning of flowering, full bloom, and 1 month later with the following treatments: water as control, 0.025, 0.05 and 0.1 mg/L Se; 5 mL/L, 7.5 and 10 mL/L Ag NPs, and 0.5, 1 and 2 mg/L K2Si2O5. The results showed that spraying of SE, Ag NPs, and K2Si2O5 ameliorated the shoot length, diameter, leaf chlorophyll content, set of fruiting percentage, and fruit yield per tree and hectare compared to control through studying seasons. Moreover, they improved the fruit weight, length, and diameter, as well as total soluble solids, total, reduced, and non-reduced sugars percent, while they lessened the juice acidity percentage compared to control. The most obvious results were noticed with Se at 0.1 mg/L, Ag NPs at 10 mL/L, and K2Si2O5 at 2 mg/L in both experimental seasons over the other applied treatments. By HPLC analysis, peel extracts showed the presence of several bioactive compounds of catechol, syringic acid, p-coumaric acid, benzoic acid, caffeic acid, pyrogallol, gallic acid, ferulic acid, salicylic acid, cinnamic acid, and ellagic acid. The extracts applied to Melia azedarach wood showed promising antifungal activity against Rhizoctonia solani and were considered wood-biofingicides.
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Ruan JH, Li J, Adili G, Sun GY, Abuduaini M, Abdulla R, Maiwulanjiang M, Aisa HA. Phenolic Compounds and Bioactivities from Pomegranate ( Punica granatum L.) Peels. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:3678-3686. [PMID: 35312314 DOI: 10.1021/acs.jafc.1c08341] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Pomegranate peels, which are normally processed as the main byproduct of pomegranate juice production, are worthy of being researched and utilized for the aim of economic and environmental benefits. In a phytochemical investigation of the peels of Punica granatum L., 10 phenolic compounds containing a common hexahydroxy diphenol moiety were isolated. Three of them were identified for the first time and named as pomegranatins A-C, and from the other seven known ones, two of them were obtained from pomegranate peels for the first time. Their structures were determined via extensive spectroscopic analysis. Besides, for the sake of preliminarily comprehending their biological activities, in vitro antimicrobial, antioxidant, as well as antitumor assays were detected. In the DPPH antioxidant assay, six compounds presented significant free radical scavenging ability. Two compounds exhibited moderate antimicrobial activities against Candida albicans; one compound could inhibit the proliferation of both C. albicans and Escherichia coli within limits. Four compounds possessed weak antitumor activity toward the Hela cell line without taking into account the bioavailability of ellagitannins. Overall, these results provided further information on the structural diversity of bioactive compounds present in pomegranate peels, as well as on their biological activities.
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Affiliation(s)
- Jing-Hui Ruan
- State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011, China
- University of Chinese Academy of Sciences, Beijing 100039, China
| | - Jun Li
- State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011, China
| | - Guliqire Adili
- University of Chinese Academy of Sciences, Beijing 100039, China
| | - Guang-Ying Sun
- State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011, China
| | - Munire Abuduaini
- State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011, China
- University of Chinese Academy of Sciences, Beijing 100039, China
| | - Rahima Abdulla
- State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011, China
| | - Maitinuer Maiwulanjiang
- State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011, China
| | - Haji Akber Aisa
- State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011, China
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Preliminary Studies on Suppression of Important Plant Pathogens by Using Pomegranate and Avocado Residual Peel and Seed Extracts. HORTICULTURAE 2022. [DOI: 10.3390/horticulturae8040283] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Potential synergistic action of aqueous extracts of pomegranate peel (PP), avocado peel (AP), and avocado seed (AS) wastes isolated by microwave-assisted extraction were assessed in in vitro and in vivo assays as biocontrol agents against several plant pathogenic fungi. The study findings contribute to the utilization of a value-added industrial byproduct and provide significant value in advancing the development of new plant protecting compositions that benefit from the synergistic effects between two important plant species that contain several natural bioactive compounds. More specifically, the in vitro results proved that the use of 100%-pure (PP) extracted waste affected the mycelium growth of Penicillium expansum. Furthermore, mycelium growth of Aspergillus niger was decreased by 10.21% compared to control after 7 days of growth in medium agar containing 100% AP and extracted waste. Moreover, mycelium growth of Botrytis cinerea was affected by equal volume of avocado extraction wastes (50% peel and 50% seed) only at the first 3 days of the inoculation, while at the seventh day of the inoculation there was no effect on the mycelium growth. Equal volumes of the examined wastes showed decreased mycelium growth of Fusarium oxysporum f.sp. lycopersici by 6%, while Rhizoctonia solani mycelium growth was found to be the most sensitive in PP application. In addition, the in vivo assay shown that PP extract suppresses damage of tomato plants caused by R. solani followed by extracted wastes from AP. Based on the research findings, it can be argued that PP and AP extracts can be used as natural antifungals instead of dangerous synthetic antifungals to effectively treat phytopathogens that cause fruit and vegetable losses during cultivation.
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Sanhueza L, García P, Giménez B, Benito JM, Matos M, Gutiérrez G. Encapsulation of Pomegranate Peel Extract ( Punica granatum L.) by Double Emulsions: Effect of the Encapsulation Method and Oil Phase. Foods 2022; 11:foods11030310. [PMID: 35159459 PMCID: PMC8833941 DOI: 10.3390/foods11030310] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 12/30/2021] [Accepted: 01/17/2022] [Indexed: 01/27/2023] Open
Abstract
Pomegranate peel is an agro-industrial waste that can be used as source of punicalagin, a polyphenolic compound with several beneficial effects on health. Since, once extracted, punicalagin is prone to degradation, its encapsulation by double emulsions can be an alternative to protect the active compound and control its release. The aim of this investigation was to evaluate the feasibility of encapsulating pomegranate peel extract (PPE) in double emulsions using different types of oils (castor, soybean, sunflower, Miglyol and orange) in a ratio of 70:30 (oil:PPE) and emulsification methods (direct membrane emulsification and mechanical agitation), using polyglycerol polyricinoleate (PGPR) and Tween 80 as lipophilic and hydrophilic emulsifiers, respectively. Direct membrane emulsification (DME) led to more stable emulsions during storage. Droplet size, span values, morphology and encapsulation efficiency (EE) were better for double emulsions (DEs) prepared by DME than for mechanical agitation (MA). DEs formulated using Miglyol or sunflower oil as the oily phase could be considered as suitable food grade systems to encapsulate punicalagin with concentrations up to 11,000 mg/L of PPE.
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Affiliation(s)
- Leyla Sanhueza
- Departamento de Ciencia de los Alimentos y Tecnología Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago 8380000, Chile;
| | - Paula García
- Departamento de Nutrición, Facultad de Medicina, Universidad de Chile, Santiago 8380453, Chile; or
| | - Begoña Giménez
- Departamento de Ciencia y Tecnología de los Alimentos, Facultad Tecnológica, Universidad de Santiago de Chile, Santiago 9170124, Chile;
| | - José Manuel Benito
- Department of Biotechnology and Food Science, University of Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain;
| | - María Matos
- Department of Chemical and Environmental Engineering, Institute of Biotechnology of Asturias, University of Oviedo, 33006 Oviedo, Spain;
| | - Gemma Gutiérrez
- Department of Chemical and Environmental Engineering, Institute of Biotechnology of Asturias, University of Oviedo, 33006 Oviedo, Spain;
- Correspondence:
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Lin H, Wang Q, Niu Y, Gu L, Hu L, Li C, Zhao G. Antifungal and Anti-inflammatory Effect of Punicalagin on Murine Aspergillus fumigatus Keratitis. Curr Eye Res 2021; 47:517-524. [PMID: 34797193 DOI: 10.1080/02713683.2021.2008982] [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: 10/19/2022]
Abstract
PURPOSE This study aimed to investigate the anti-inflammatory effect and antifungal effect of punicalagin in murine fungal keratitis. METHODS We used in vitro and in vivo protocols to assess the anti-inflammatory effect and antifungal effect of punicalagin. In vitro, time kill and mycelial stain were done. In vivo, murine fungal keratitis was established and treated with PBS or PUN. Clinical scores were taken on days 1, 3, and 5 post infection. The mRNA and protein levels of inflammatory factors were detected by RT-PCR and Western blot, and the number and location of macrophages were analyzed by flow cytometry and immunofluorescence. Also, fungal plate counting was used to assess the antifungal effect. The DCFH-DA fluorescence probe detected the ROS level. RESULTS In vitro, PUN showed activity against A.fumigatus. (A.F.), with MIC90 values of 250 μg/ml, and significantly reduced A.F. biofilm formation (p < .001). In vivo, the mouse fungal keratitis model after punicalagin treatment exhibited less disease, lower clinical scores (p < .05), lower reduced macrophage infiltrate (p < .001), and fungal load (p < .001) than those treated with PBS. Treatment with punicalagin also reduced the mRNA expression and protein level of pro-inflammatory factors. At the cellular level, PUN significantly reduced the mRNA expression of inflammatory factors and ROS production caused by the stimulation of mycelia in RAW264.7 (p < .001). CONCLUSIONS The results show that punicalagin is beneficial in the treatment of murine fungal keratitis. The mechanism of its anti-inflammatory effect was synthetical, including antifungal activity, an inhibitory effect of proinflammatory factor and macrophages, and anti-oxidation.
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Affiliation(s)
- Hao Lin
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Qian Wang
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Yawen Niu
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Lingwen Gu
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Liting Hu
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Cui Li
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Guiqiu Zhao
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, China
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Belgacem I, Li Destri Nicosia MG, Pangallo S, Abdelfattah A, Benuzzi M, Agosteo GE, Schena L. Pomegranate Peel Extracts as Safe Natural Treatments to Control Plant Diseases and Increase the Shelf-Life and Safety of Fresh Fruits and Vegetables. PLANTS (BASEL, SWITZERLAND) 2021; 10:453. [PMID: 33673670 PMCID: PMC7997167 DOI: 10.3390/plants10030453] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 02/20/2021] [Accepted: 02/23/2021] [Indexed: 11/16/2022]
Abstract
Although the Green Revolution was a milestone in agriculture, it was accompanied by intensive use of synthetic pesticides, which has raised serious concerns due to their impact on human and environmental health. This is increasingly stimulating the search for safer and more eco-friendly alternative means to control plant diseases and prevent food spoilage. Among the proposed alternatives, pomegranate peel extracts (PPEs) are very promising because of their high efficacy. In the present review, we discuss the complex mechanisms of action that include direct antimicrobial activity and induction of resistance in treated plant tissues and highlight the importance of PPE composition in determining their activity. The broad spectrum of activity, wide range of application and high efficiency of PPEs against bacterial, fungal and viral plant pathogens suggest a potential market not only restricted to organic production but also integrated farming systems. Considering that PPEs are non-chemical by-products of the pomegranate industry, they are perceived as safe by the public and may be integrated in circular economy strategies. This will likely encourage agro-pharmaceutical industries to develop commercial formulations and speed up the costly process of registration.
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Affiliation(s)
- Imen Belgacem
- Dipartimento di Agraria, Università Mediterranea, 89122 Reggio Calabria, Italy; (I.B.); (M.G.L.D.N.); (S.P.); (G.E.A.)
| | - Maria G. Li Destri Nicosia
- Dipartimento di Agraria, Università Mediterranea, 89122 Reggio Calabria, Italy; (I.B.); (M.G.L.D.N.); (S.P.); (G.E.A.)
| | - Sonia Pangallo
- Dipartimento di Agraria, Università Mediterranea, 89122 Reggio Calabria, Italy; (I.B.); (M.G.L.D.N.); (S.P.); (G.E.A.)
| | - Ahmed Abdelfattah
- Institute of Environmental Biotechnology, Graz University of Technology, A-8010 Graz, Austria;
| | - Massimo Benuzzi
- BIOGARD, Division of CBC (Europe) srl, 24050 Bergamo, Italy;
| | - Giovanni E. Agosteo
- Dipartimento di Agraria, Università Mediterranea, 89122 Reggio Calabria, Italy; (I.B.); (M.G.L.D.N.); (S.P.); (G.E.A.)
| | - Leonardo Schena
- Dipartimento di Agraria, Università Mediterranea, 89122 Reggio Calabria, Italy; (I.B.); (M.G.L.D.N.); (S.P.); (G.E.A.)
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Melgarejo-Sánchez P, Núñez-Gómez D, Martínez-Nicolás JJ, Hernández F, Legua P, Melgarejo P. Pomegranate variety and pomegranate plant part, relevance from bioactive point of view: a review. BIORESOUR BIOPROCESS 2021; 8:2. [PMID: 38650225 PMCID: PMC10973758 DOI: 10.1186/s40643-020-00351-5] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 11/22/2020] [Indexed: 02/06/2023] Open
Abstract
Pomegranate (Punica granatum L.) belongs to the Punicaceae plant family. It is an important fruit due to its nutritional and medicinal properties. Pomegranates are widely distributed around the world and, therefore, have a broad genetic diversity, resulting in differences in their phytochemical composition. The scientific community has focused on the positive health effects of pomegranate as a whole, but the different varieties have rarely been compared according to their bioactive compounds and bioactivity. This review aims to provide a holistic overview of the current knowledge on the bioactivity of pomegranate trees, with an emphasis on differentiating both the varieties and the different plant parts. This review intends to provide a general and organized overview of the accumulated knowledge on pomegranates, the identification of the most bioactive varieties, their potential consumption pathways and seeks to provide knowledge on the present gaps to guide future research.
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Affiliation(s)
- Pablo Melgarejo-Sánchez
- Plant Production and Microbiology Department, Orihuela Polytechnical High School (EPSO), Miguel Hernandez University, Ctra. Beniel Km 3.2, 03312, Orihuela, Spain
| | - Dámaris Núñez-Gómez
- Plant Production and Microbiology Department, Orihuela Polytechnical High School (EPSO), Miguel Hernandez University, Ctra. Beniel Km 3.2, 03312, Orihuela, Spain.
| | - Juan J Martínez-Nicolás
- Plant Production and Microbiology Department, Orihuela Polytechnical High School (EPSO), Miguel Hernandez University, Ctra. Beniel Km 3.2, 03312, Orihuela, Spain
| | - Francisca Hernández
- Plant Production and Microbiology Department, Orihuela Polytechnical High School (EPSO), Miguel Hernandez University, Ctra. Beniel Km 3.2, 03312, Orihuela, Spain
| | - Pilar Legua
- Plant Production and Microbiology Department, Orihuela Polytechnical High School (EPSO), Miguel Hernandez University, Ctra. Beniel Km 3.2, 03312, Orihuela, Spain
| | - Pablo Melgarejo
- Plant Production and Microbiology Department, Orihuela Polytechnical High School (EPSO), Miguel Hernandez University, Ctra. Beniel Km 3.2, 03312, Orihuela, Spain
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14
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Akroum S, Rouibah M. [Protection by some plant methanol extracts of cherry tomatoes (Solanum lycopersicum var. Cerasiforme) from fungic infection by Alternaria alternata]. Biol Aujourdhui 2020; 214:55-61. [PMID: 32773030 DOI: 10.1051/jbio/2020001] [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] [Received: 01/28/2020] [Indexed: 01/10/2023]
Abstract
Cherry tomato is very susceptible to fungal infections that can cause considerable damage in crops and during storage. Alternaria infection is one of the most common and dangerous alterations for this fruit. They are caused by Alternaria alternata or some other species belonging to the same genus. In this work, we tested the antifungal activity of methanol extracts from five plants harvested in the region of Jijel (Algeria) on A. alternata. The activity was first tested in vitro and then on greenhouse cherry tomato plants: extracts were applied to healthy plants before infection in order to test their preventive action, and after infection to determine whether they are able to knock out Alternaria. Results showed that Rosmarinus officinalis and Lavandula angustifolia extracts were the most active in vitro on A. alternata. Microscopic observations of the mold indicated that these extracts inhibited the dictyospores production. The antifungal activity tested on the plants grown in greenhouse revealed that R. officinalis extract still was the most active. Extracts of L. angustifolia and Punica granatum did not protect the plants from Alternaria infection, but provided a total cure at the end of the treatment. Extracts from Quercus suber and Eucalyptus globulus were the least active. They did not bestow any protection nor complete healing of the plants. Dictyospores counting on fruits at the end of the treatment confirmed the results obtained for the greenhouse crops.
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Affiliation(s)
- Souâd Akroum
- Laboratoire de Biologie Moléculaire et Cellulaire, Faculté des Sciences de la Nature et de la Vie, Université Mohamed Seddik Ben Yahia, BP 98 Ouled Aissa, Jijel 18000, Algérie
| | - Moad Rouibah
- Laboratoire de Biotechnologie, Environnement et Santé, Faculté des Sciences de la Nature et de la Vie, Université Mohamed Seddik Ben Yahia, BP 98 Ouled Aissa, Jijel 18000, Algérie
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15
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Abstract
Fruits come in a wide variety of colors, shapes, and flavors. This chapter will cover selected fruits that are known to be healthy and highly nutritious. These fruits were chosen due to their common usage and availability. Since it is not possible to cover all health benefits or essential nutrients and important phytochemicals of the fruit composition, this chapter will focus on the key valuable constituents and their potential health effects.
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Affiliation(s)
- Sawsan G Mohammed
- Qatar Research Leadership Program (QRLP), Qatar Foundation, Doha, Qatar.
| | - M Walid Qoronfleh
- Research & Policy Department, World Innovation Summit for Health (WISH), Qatar Foundation, Doha, Qatar.
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16
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Combined Effect of Spirulina Platensis and Punica Granatum Peel Extacts: Phytochemical Content and Antiphytophatogenic Activity. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9245475] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Biological control is one of the effective methods for managing plant diseases in food production and quality. In fact, there is a growing trend to find new bio-sources, such as marine algae and vegetal by-products. In this study, pomegranate (Punica granatum) peel (S1) and Spirulina platensis (S2) alone and in combinations, pomegranate peel/Spirulina: 25%/75% (S3) and 50%/50% (S4) were evaluated for antimycotoxigenic and antiphytopathogenic fungal properties. The chemical composition (moisture, dry matter, protein, lipid and ash) as well as total polyphenols, flavonoids and anthocyanins content were evaluated in the four extracts. Using agar diffusion and broth microdilution methods, the anti Fusarium oxysporum, Fusarium culmorum, Fusarium graminearum, Aspergillus niger and Alternaria alternata activities were measured and their correlations with phytochemical content were evaluated. Interestingly, combinations between Spirulina at 75% and pomegranate peel at 25% (S3) have a significant impact (p < 0.05) on the antifungal activity compared to S1, S2 and S4. These findings underlie the effectiveness of biocontrols over standard fungicides and imply that existing methods can be further improved by synergistic effects while maintaining food safety in an eco-friendly manner.
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Sadhasivam S, Shapiro OH, Ziv C, Barda O, Zakin V, Sionov E. Synergistic Inhibition of Mycotoxigenic Fungi and Mycotoxin Production by Combination of Pomegranate Peel Extract and Azole Fungicide. Front Microbiol 2019; 10:1919. [PMID: 31481948 PMCID: PMC6710344 DOI: 10.3389/fmicb.2019.01919] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 08/05/2019] [Indexed: 12/27/2022] Open
Abstract
Fungal plant pathogens cause considerable losses in yield and quality of field crops worldwide. In addition, under specific environmental conditions, many fungi, including such as some Fusarium and Aspergillus spp., are further able to produce mycotoxins while colonizing their host, which accumulate in human and animal tissues, posing a serious threat to consumer health. Extensive use of azole fungicides in crop protection stimulated the emergence of acquired azole resistance in some plant and human fungal pathogens. Combination treatments, which become popular in clinical practice, offer an alternative strategy for managing potentially resistant toxigenic fungi and reducing the required dosage of specific drugs. In the current study we tested the effect of pomegranate peel extract (PPE) on the growth and toxin production of the mycotoxigenic fungi Aspergillus flavus and Fusarium proliferatum, both alone and in combination with the azole fungicide prochloraz (PRZ). Using time-lapse microscopy and quantitative image analysis we demonstrate significant delay of conidial germination and hyphal elongation rate in both fungi following PPE treatment in combination with PRZ. Moreover, PPE treatment reduced aflatoxin production by A. flavus up to 97%, while a combined treatment with sub-inhibitory doses of PPE and PRZ resulted in complete inhibition of toxin production over a 72 h treatment. These findings were supported by qRT-PCR analysis, showing down-regulation of key genes involved in the aflatoxin biosynthetic pathway under combined PPE/PRZ treatment al low concentrations. Our results provide first evidence for synergistic effects between the commercial drug PRZ and natural compound PPE. Future application of these findings may allow to reduce the required dosage of PRZ, and possibly additional azole drugs, to inhibit mycotoxigenic fungi, ultimately reducing potential concerns over exposure to high doses of these potentially harmful fungicides.
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Affiliation(s)
- Sudharsan Sadhasivam
- Department of Food Quality and Safety, Institute for Postharvest and Food Sciences, Agricultural Research Organization, The Volcani Center, Rishon LeZion, Israel
| | - Orr H. Shapiro
- Department of Food Quality and Safety, Institute for Postharvest and Food Sciences, Agricultural Research Organization, The Volcani Center, Rishon LeZion, Israel
| | - Carmit Ziv
- Department of Postharvest Science, Institute for Postharvest and Food Sciences, Agricultural Research Organization, The Volcani Center, Rishon LeZion, Israel
| | - Omer Barda
- Department of Food Quality and Safety, Institute for Postharvest and Food Sciences, Agricultural Research Organization, The Volcani Center, Rishon LeZion, Israel
| | - Varda Zakin
- Department of Food Quality and Safety, Institute for Postharvest and Food Sciences, Agricultural Research Organization, The Volcani Center, Rishon LeZion, Israel
| | - Edward Sionov
- Department of Food Quality and Safety, Institute for Postharvest and Food Sciences, Agricultural Research Organization, The Volcani Center, Rishon LeZion, Israel
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18
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Ali A, Chen Y, Liu H, Yu L, Baloch Z, Khalid S, Zhu J, Chen L. Starch-based antimicrobial films functionalized by pomegranate peel. Int J Biol Macromol 2019; 129:1120-1126. [PMID: 30218726 DOI: 10.1016/j.ijbiomac.2018.09.068] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 09/09/2018] [Accepted: 09/11/2018] [Indexed: 11/16/2022]
Abstract
In this work, pomegranate peel (PGP) as an antimicrobial agent as well as a reinforcing agent was utilized in developing starch-based films. Hydroxypropyl high-amylose starch plasticized by water and glycerol was used in this work. The microstructure and performance of films were investigated using scanning electron microscope (SEM), optical microscope (OM), X-ray diffraction (XRD), dynamic mechanical analyzer, tensile testing, drop impact testing and disc diffusion test. Results clearly demonstrated that PGP inhibited the growth of both gram-positive (S. aureus) and gram-negative (Salmonella) bacteria. Meanwhile, PGP also increased Young's modulus, tensile strength and stiffness of the starch-based films. Both OM and SEM observations indicated reasonably good compatibility between starch and PGP particles. The XRD results indicated that PGP retained its semi-crystalline structure in the film, which can be used to explain the mechanism of mechanical reinforcement. Since all the components are food ingredients, so it is expected that the developed material can be used as an edible film and food grade packaging material.
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19
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Chestnut (Castanea sativa Miller.) Burs Extracts and Functional Compounds: UHPLC-UV-HRMS Profiling, Antioxidant Activity, and Inhibitory Effects on Phytopathogenic Fungi. Molecules 2019; 24:molecules24020302. [PMID: 30650628 PMCID: PMC6359146 DOI: 10.3390/molecules24020302] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 01/11/2019] [Accepted: 01/13/2019] [Indexed: 12/22/2022] Open
Abstract
Chestnut (Castanea sativa Miller.) burs (CSB) represent a solid waste produced during the edible fruit harvesting. Their usual disposal in the field increases the environmental and economic impact of the agricultural process. HPLC-UV-HRMS profiling revealed that CSB organic and aqueous extracts (CSB-M, CSB-H, CSB-A) contain several hydrolyzable tannins, mainly ellagitannins, and glycoside flavonols. Ellagic acid (EA) and chestanin are predominant components (5–79 and 1–13 mg/g dry extract, respectively). NMR analysis confirmed the chemical structures of the major constituents from CSB-M. The extracts displayed a significant scavenging activity against DPPH• (EC50 12.64–24.94 µg/mL) and ABTS•+ radicals (TEAC value 2.71–3.52 mM Trolox/mg extract). They were effective in inhibiting the mycelial growth (EC50 6.04–15.51 mg/mL) and spore germination (EC50 2.22–11.17 mg/mL) of Alternaria alternata and Fusarium solani. At the highest concentration, CSB-M was also active against Botrytis cinerea both in mycelium and spore form (EC50 64.98 and 16.33 mg/mL). The EA contributed to the antifungal activity of extracts (EC50 on spore germination 13.33–112.64 µg/mL). Our results can support the upgrading of chestnut burs from agricultural wastes to a resource of natural fungicides for managing fruit and vegetable diseases.
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20
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Husain H, Latief U, Ahmad R. Pomegranate action in curbing the incidence of liver injury triggered by Diethylnitrosamine by declining oxidative stress via Nrf2 and NFκB regulation. Sci Rep 2018; 8:8606. [PMID: 29872102 PMCID: PMC5988808 DOI: 10.1038/s41598-018-26611-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Accepted: 05/15/2018] [Indexed: 01/14/2023] Open
Abstract
Unearthing and employment of healthy substitutes is now in demand to tackle a number of diseases due to the excessive repercussions of synthetic drugs. In this frame of reference pomegranate juice (PGJ) is a boon comprising of anthocyanins and hydrolysable tannins, known for its anti-oxidant and anti-inflammatory properties. Despite various documented roles of PGJ, there are no studies on antifibrotic potential in NDEA-induced mammalian liver fibrotic model. Hepatic fibrosis in rats was induced by the intra-peritoneal injection of NDEA (10 mlkg-1b.wt. of 1% NDEA) in two weeks. Biochemical, histopathological and ultra-structural studies were carried out on control, fibrotic and treated rats. The liver function indices and LPO were increased significantly by intoxication of NDEA. The antioxidant status was disturbed with the decrease in SOD, GST and catalase in the liver and membrane-ATPases as well. Histopathological observations by H&E, M&T, picro-sirius and ultra-structural scrutiny by SEM and TEM indicated liver damage and increase in COX2 and α-SMA by NDEA which was successfully rectified by the supplementation of PGJ. PGJ abrogates liver fibrosis instigated by NDEA in Wistar rats by declining oxidative stress via regulation of Nrf2 and NFκB. These findings point towards pomegranate as a potential and efficacious therapeutic agent against liver fibrosis.
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Affiliation(s)
- Hadiya Husain
- Biochemical and Clinical Genetics Lab, Section of Genetics, Department of Zoology, Faculty of Life Science, Aligarh Muslim University, Aligarh, 202002, India
| | - Uzma Latief
- Biochemical and Clinical Genetics Lab, Section of Genetics, Department of Zoology, Faculty of Life Science, Aligarh Muslim University, Aligarh, 202002, India
| | - Riaz Ahmad
- Biochemical and Clinical Genetics Lab, Section of Genetics, Department of Zoology, Faculty of Life Science, Aligarh Muslim University, Aligarh, 202002, India.
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21
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Tocci N, Perenzoni D, Iamonico D, Fava F, Weil T, Mattivi F. Extracts From Hypericum hircinum subsp. majus Exert Antifungal Activity Against a Panel of Sensitive and Drug-Resistant Clinical Strains. Front Pharmacol 2018; 9:382. [PMID: 29755350 PMCID: PMC5932341 DOI: 10.3389/fphar.2018.00382] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Accepted: 04/03/2018] [Indexed: 12/27/2022] Open
Abstract
During the last two decades incidences of fungal infections dramatically increased and the often accompanying failure of available antifungal therapies represents a substantial clinical problem. The urgent need for novel antimycotics called particular attention to the study of natural products. The genus Hypericum includes many species that are used in the traditional medicine to treat pathological states like inflammations and infections caused by fungi. However, despite the diffused use of Hypericum-based products the antifungal potential of the genus is still poorly investigated. In this study five Hypericum species autochthonous of Central and Eastern Europe were evaluated regarding their polyphenolic content, their toxicological safety and their antifungal potential against a broad panel of clinical fungal isolates. LC-MS analysis led to the identification and quantification of 52 compounds, revealing that Hypericum extracts are rich sources of flavonols, benzoates and cinnamates, and of flavan-3-ols. An in-depth screen of the biological activity of crude extracts clearly unveiled H. hircinum subsp. majus as a promising candidate species for the search of novel antifungals. H. hircinum is diffused in the Mediterranean basin from Spain to Turkey where it is traditionally used to prepare a herbal tea indicated for the treatment of respiratory tract disorders, several of which are caused by fungi. Noteworthy, the infusion of H. hircinum subsp. majus excreted broad antifungal activity against Penicillium, Aspergillus and non-albicans Candida isolates comprising strains both sensitive and resistant to fluconazole. Additionally, it showed no cytotoxicity on human cells and the chemical characterization of the H. hircinum subsp. majus infusion revealed high amounts of the metabolite hyperoside. These results scientifically support the traditional use of H. hircinum extracts for the treatment of respiratory tract infections and suggest the presence of exploitable antifungal principles for further investigations aimed at developing novel antifungal therapies.
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Affiliation(s)
- Noemi Tocci
- Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige, Italy
| | - Daniele Perenzoni
- Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige, Italy
| | - Duilio Iamonico
- Laboratory of Phytogeography and Applied Geobotany, Section Environment and Landscape, Department of Planning, Design, and Technology of Architecture, Sapienza University of Rome, Rome, Italy
| | - Francesca Fava
- Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige, Italy
| | - Tobias Weil
- Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige, Italy
| | - Fulvio Mattivi
- Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige, Italy.,Centre Agriculture Food Environment, University of Trento, Trento, Italy
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22
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Zhai X, Zhu C, Li Y, Zhang Y, Duan Z, Yang X. Optimization for pectinase-assisted extraction of polysaccharides from pomegranate peel with chemical composition and antioxidant activity. Int J Biol Macromol 2018; 109:244-253. [DOI: 10.1016/j.ijbiomac.2017.12.064] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 11/14/2017] [Accepted: 12/10/2017] [Indexed: 12/15/2022]
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23
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Kharchoufi S, Parafati L, Licciardello F, Muratore G, Hamdi M, Cirvilleri G, Restuccia C. Edible coatings incorporating pomegranate peel extract and biocontrol yeast to reduce Penicillium digitatum postharvest decay of oranges. Food Microbiol 2018; 74:107-112. [PMID: 29706324 DOI: 10.1016/j.fm.2018.03.011] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 03/19/2018] [Accepted: 03/20/2018] [Indexed: 01/09/2023]
Abstract
This study investigated the potential use of two edible coatings, chitosan (CH) and locust bean gum (LBG), which incorporated chemically characterized water pomegranate peel extract (WPPE) or methanol pomegranate peel extract (MPPE) and the biocontrol agent (BCA) Wickerhamomyces anomalus, to control the growth of Penicillium digitatum and to reduce the postharvest decay of oranges. CH and LBG including pomegranate peel extracts (PPEs) at different concentrations were tested in vitro against P. digitatum to determine their antifungal efficacy; at the same time, the tolerance of viable cells of W. anomalus to increasing concentrations of WPPE and MPPE extracts was assessed. The potential application of selected bioactive coatings was evaluated in vivo on oranges, which had been artificially inoculated with P. digitatum, causal agent of green mold decay. CH incorporating MPPE or WPPE at all concentrations was able to inhibit in vitro P. digitatum, while LBG was active only at the highest MPPE or WPPE concentrations. W. anomalus BS91 was slightly inhibited only by MPPE-modified coatings, while no inhibition was observed by WPPE, which was therefore selected for the in vivo trials on oranges artificially inoculated with P. digitatum. The experimental results proved that the addition of 0.361 g dry WPPE/mL, both to CH and LBG coatings, significantly reduced disease incidence (DI) by 49 and 28% respectively, with respect to the relative controls. Besides the combination CH or LBG + WPPE, the addition of W. anomalus cells to coatings strengthened the antifungal effect with respect to the relative controls, as demonstrated by the significant reduction of DI (up to 95 and 75% respectively). The findings of the study contribute to the valorization of a value-added industrial byproduct and provide a significant advancement in the development of new food protectant formulations, which benefit from the synergistic effect between biocontrol agents and natural bioactive compounds.
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Affiliation(s)
- Samira Kharchoufi
- Laboratory of Microbial Ecology and Technology, National Institute of Applied Sciences and Technology (INSAT), University of Carthage, Centre Urbain Nord, 2 Boulevard de la Terre, B.P. 676, 1080, Tunis, Tunisia
| | - Lucia Parafati
- Department of Agriculture, Food and Environment (Di3A), University of Catania, via S. Sofia 100, 95123, Catania, Italy
| | - Fabio Licciardello
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Amendola 2, 42122, Reggio Emilia, Italy
| | - Giuseppe Muratore
- Department of Agriculture, Food and Environment (Di3A), University of Catania, via S. Sofia 100, 95123, Catania, Italy
| | - Mokthar Hamdi
- Laboratory of Microbial Ecology and Technology, National Institute of Applied Sciences and Technology (INSAT), University of Carthage, Centre Urbain Nord, 2 Boulevard de la Terre, B.P. 676, 1080, Tunis, Tunisia
| | - Gabriella Cirvilleri
- Department of Agriculture, Food and Environment (Di3A), University of Catania, via S. Sofia 100, 95123, Catania, Italy
| | - Cristina Restuccia
- Department of Agriculture, Food and Environment (Di3A), University of Catania, via S. Sofia 100, 95123, Catania, Italy.
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Salih EYA, Fyhrquist P, Abdalla AMA, Abdelgadir AY, Kanninen M, Sipi M, Luukkanen O, Fahmi MKM, Elamin MH, Ali HA. LC-MS/MS Tandem Mass Spectrometry for Analysis of Phenolic Compounds and Pentacyclic Triterpenes in Antifungal Extracts of Terminalia brownii (Fresen). Antibiotics (Basel) 2017; 6:E37. [PMID: 29236070 PMCID: PMC5745480 DOI: 10.3390/antibiotics6040037] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 11/29/2017] [Accepted: 12/07/2017] [Indexed: 12/11/2022] Open
Abstract
Decoctions and macerations of the stem bark and wood of Terminalia brownii Fresen. are used in traditional medicine for fungal infections and as fungicides on field crops and in traditional granaries in Sudan. In addition, T. brownii water extracts are commonly used as sprays for protecting wooden houses and furniture. Therefore, using agar disc diffusion and macrodilution methods, eight extracts of various polarities from the stem wood and bark were screened for their growth-inhibitory effects against filamentous fungi commonly causing fruit, vegetable, grain and wood decay, as well as infections in the immunocompromised host. Ethyl acetate extracts of the stem wood and bark gave the best antifungal activities, with MIC values of 250 µg/mL against Nattrassia mangiferae and Fusarium verticillioides, and 500 µg/mL against Aspergillus niger and Aspergillus flavus. Aqueous extracts gave almost as potent effects as the ethyl acetate extracts against the Aspergillus and Fusarium strains, and were slightly more active than the ethyl acetate extracts against Nattrassiamangiferae. Thin layer chromatography, RP-HPLC-DAD and tandem mass spectrometry (LC-MS/MS), were employed to identify the chemical constituents in the ethyl acetate fractions of the stem bark and wood. The stem bark and wood were found to have a similar qualitative composition of polyphenols and triterpenoids, but differed quantitatively from each other. The stilbene derivatives, cis- (3) and trans- resveratrol-3-O-β-galloylglucoside (4), were identified for the first time in T. brownii. Moreover, methyl-(S)-flavogallonate (5), quercetin-7-β-O-di-glucoside (8), quercetin-7-O-galloyl-glucoside (10), naringenin-4'-methoxy-7-pyranoside (7), 5,6-dihydroxy-3',4',7-tri-methoxy flavone (12), gallagic acid dilactone (terminalin) (6), a corilagin derivative (9) and two oleanane type triterpenoids (1) and (2) were characterized. The flavonoids, a corilagin derivative and terminalin, have not been identified before in T. brownii. We reported earlier on the occurrence of methyl-S-flavogallonate and its isomer in the roots of T. brownii, but this is the first report on their occurrence in the stem wood as well. Our results justify the traditional uses of macerations and decoctions of T. brownii stem wood and bark for crop and wood protection and demonstrate that standardized extracts could have uses for the eco-friendly control of plant pathogenic fungi in African agroforestry systems. Likewise, our results justify the traditional uses of these preparations for the treatment of skin infections caused by filamentous fungi.
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Affiliation(s)
- Enass Y A Salih
- Department of Forest Products and Industries, Faculty of Forestry, PO Box 13314, University of Khartoum, Khartoum 11111, Sudan.
- Faculty of Pharmacy, Division of Pharmaceutical Biosciences, PO Box 56, University of Helsinki, FIN-00014 Helsinki, Finland.
- Viikki Tropical Resources Institute (VITRI), Department of Forest Sciences, PO Box 27, University of Helsinki, FIN-00014 Helsinki, Finland.
| | - Pia Fyhrquist
- Faculty of Pharmacy, Division of Pharmaceutical Biosciences, PO Box 56, University of Helsinki, FIN-00014 Helsinki, Finland.
| | - Ashraf M A Abdalla
- Department of Forest Products and Industries, Faculty of Forestry, PO Box 13314, University of Khartoum, Khartoum 11111, Sudan.
| | - Abdelazim Y Abdelgadir
- Department of Forest Products and Industries, Faculty of Forestry, PO Box 13314, University of Khartoum, Khartoum 11111, Sudan.
| | - Markku Kanninen
- Viikki Tropical Resources Institute (VITRI), Department of Forest Sciences, PO Box 27, University of Helsinki, FIN-00014 Helsinki, Finland.
| | - Marketta Sipi
- Viikki Tropical Resources Institute (VITRI), Department of Forest Sciences, PO Box 27, University of Helsinki, FIN-00014 Helsinki, Finland.
| | - Olavi Luukkanen
- Viikki Tropical Resources Institute (VITRI), Department of Forest Sciences, PO Box 27, University of Helsinki, FIN-00014 Helsinki, Finland.
| | - Mustafa K M Fahmi
- Department of Forest Products and Industries, Faculty of Forestry, PO Box 13314, University of Khartoum, Khartoum 11111, Sudan.
- Viikki Tropical Resources Institute (VITRI), Department of Forest Sciences, PO Box 27, University of Helsinki, FIN-00014 Helsinki, Finland.
| | - Mai H Elamin
- Department of Phytochemistry, Faculty of Pharmacy, PO Box 477, University of Sciences and Technology, Omdurman, Sudan.
| | - Hiba A Ali
- Commission for Biotechnology and Genetic Engineering, PO Box 2404, National Centre for Research, Khartoum, Sudan.
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Pangallo S, Nicosia MGLD, Agosteo GE, Abdelfattah A, Romeo FV, Cacciola SO, Rapisarda P, Schena L. Evaluation of a Pomegranate Peel Extract as an Alternative Means to Control Olive Anthracnose. PHYTOPATHOLOGY 2017; 107:1462-1467. [PMID: 28766401 DOI: 10.1094/phyto-04-17-0133-r] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Olive anthracnose is caused by different species of Colletotrichum spp. and may be regarded as the most damaging disease of olive fruit worldwide, greatly affecting quality and quantity of the productions. A pomegranate peel extract (PGE) proved very effective in controlling the disease. The extract had a strong in vitro fungicidal activity against Colletotrichum acutatum sensu stricto, was very effective in both preventive and curative trials with artificially inoculated fruit, and induced resistance in treated olive tissues. In field trials, PGE was significantly more effective than copper, which is traditionally used to control the disease. The highest level of protection was achieved by applying the extract in the early ascending phase of the disease outbreaks because natural rots were completely inhibited with PGE at 12 g/liter and were reduced by 98.6 and by 93.0% on plants treated with PGE at 6 and 3 g/liter, respectively. Two treatments carried out 30 and 15 days before the expected epidemic outbreak reduced the incidence of the disease by 77.6, 57.0, and 51.8%, depending on the PGE concentration. The analysis of epiphytic populations showed a strong antimicrobial activity of PGE, which sharply reduced both fungal and bacterial populations. Because PGE was obtained from a natural matrix using safe chemicals and did not have any apparent phytotoxic effect on treated olive fruit, it may be regarded as a safe and effective natural antifungal preparation to control olive anthracnose and improve olive productions.
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Affiliation(s)
- Sonia Pangallo
- First, second, third, fourth, and eighth authors: Dipartimento di Agraria, Università Mediterranea di Reggio Calabria, Località Feo di Vito, Reggio Calabria 89122, Italy; fifth and seventh authors: Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CREA)-Centro di Ricerca Olivicoltura, Frutticoltura e Agrumicoltura (CREA-OFA), Corso Savoia 190, 95024 Acireale (CT) 95024; and sixth author: Dipartimento di Agricoltura, Alimentazione e Ambiente, Università degli Studi, Via S. Sofia 100, 95123 Catania, Italy
| | - Maria G Li Destri Nicosia
- First, second, third, fourth, and eighth authors: Dipartimento di Agraria, Università Mediterranea di Reggio Calabria, Località Feo di Vito, Reggio Calabria 89122, Italy; fifth and seventh authors: Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CREA)-Centro di Ricerca Olivicoltura, Frutticoltura e Agrumicoltura (CREA-OFA), Corso Savoia 190, 95024 Acireale (CT) 95024; and sixth author: Dipartimento di Agricoltura, Alimentazione e Ambiente, Università degli Studi, Via S. Sofia 100, 95123 Catania, Italy
| | - Giovanni E Agosteo
- First, second, third, fourth, and eighth authors: Dipartimento di Agraria, Università Mediterranea di Reggio Calabria, Località Feo di Vito, Reggio Calabria 89122, Italy; fifth and seventh authors: Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CREA)-Centro di Ricerca Olivicoltura, Frutticoltura e Agrumicoltura (CREA-OFA), Corso Savoia 190, 95024 Acireale (CT) 95024; and sixth author: Dipartimento di Agricoltura, Alimentazione e Ambiente, Università degli Studi, Via S. Sofia 100, 95123 Catania, Italy
| | - Ahmed Abdelfattah
- First, second, third, fourth, and eighth authors: Dipartimento di Agraria, Università Mediterranea di Reggio Calabria, Località Feo di Vito, Reggio Calabria 89122, Italy; fifth and seventh authors: Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CREA)-Centro di Ricerca Olivicoltura, Frutticoltura e Agrumicoltura (CREA-OFA), Corso Savoia 190, 95024 Acireale (CT) 95024; and sixth author: Dipartimento di Agricoltura, Alimentazione e Ambiente, Università degli Studi, Via S. Sofia 100, 95123 Catania, Italy
| | - Flora V Romeo
- First, second, third, fourth, and eighth authors: Dipartimento di Agraria, Università Mediterranea di Reggio Calabria, Località Feo di Vito, Reggio Calabria 89122, Italy; fifth and seventh authors: Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CREA)-Centro di Ricerca Olivicoltura, Frutticoltura e Agrumicoltura (CREA-OFA), Corso Savoia 190, 95024 Acireale (CT) 95024; and sixth author: Dipartimento di Agricoltura, Alimentazione e Ambiente, Università degli Studi, Via S. Sofia 100, 95123 Catania, Italy
| | - Santa O Cacciola
- First, second, third, fourth, and eighth authors: Dipartimento di Agraria, Università Mediterranea di Reggio Calabria, Località Feo di Vito, Reggio Calabria 89122, Italy; fifth and seventh authors: Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CREA)-Centro di Ricerca Olivicoltura, Frutticoltura e Agrumicoltura (CREA-OFA), Corso Savoia 190, 95024 Acireale (CT) 95024; and sixth author: Dipartimento di Agricoltura, Alimentazione e Ambiente, Università degli Studi, Via S. Sofia 100, 95123 Catania, Italy
| | - Paolo Rapisarda
- First, second, third, fourth, and eighth authors: Dipartimento di Agraria, Università Mediterranea di Reggio Calabria, Località Feo di Vito, Reggio Calabria 89122, Italy; fifth and seventh authors: Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CREA)-Centro di Ricerca Olivicoltura, Frutticoltura e Agrumicoltura (CREA-OFA), Corso Savoia 190, 95024 Acireale (CT) 95024; and sixth author: Dipartimento di Agricoltura, Alimentazione e Ambiente, Università degli Studi, Via S. Sofia 100, 95123 Catania, Italy
| | - Leonardo Schena
- First, second, third, fourth, and eighth authors: Dipartimento di Agraria, Università Mediterranea di Reggio Calabria, Località Feo di Vito, Reggio Calabria 89122, Italy; fifth and seventh authors: Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CREA)-Centro di Ricerca Olivicoltura, Frutticoltura e Agrumicoltura (CREA-OFA), Corso Savoia 190, 95024 Acireale (CT) 95024; and sixth author: Dipartimento di Agricoltura, Alimentazione e Ambiente, Università degli Studi, Via S. Sofia 100, 95123 Catania, Italy
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John KM, Bhagwat AA, Luthria DL. Swarm motility inhibitory and antioxidant activities of pomegranate peel processed under three drying conditions. Food Chem 2017; 235:145-153. [DOI: 10.1016/j.foodchem.2017.04.143] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 03/22/2017] [Accepted: 04/24/2017] [Indexed: 11/17/2022]
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Xu Y, Shi C, Wu Q, Zheng Z, Liu P, Li G, Peng X, Xia X. Antimicrobial Activity of Punicalagin Against Staphylococcus aureus and Its Effect on Biofilm Formation. Foodborne Pathog Dis 2017; 14:282-287. [DOI: 10.1089/fpd.2016.2226] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Affiliation(s)
- Yunfeng Xu
- College of Food Science and Engineering, Northwest A&F University, Yangling, China
| | - Chao Shi
- College of Food Science and Engineering, Northwest A&F University, Yangling, China
| | - Qian Wu
- College of Food Science and Engineering, Northwest A&F University, Yangling, China
| | - Zhiwei Zheng
- College of Food Science and Engineering, Northwest A&F University, Yangling, China
| | - Peifeng Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling, China
| | - Guanghui Li
- Food and Bioengineering College, Xuchang University, Xuchang, China
| | - Xiaoli Peng
- College of Food Science and Engineering, Northwest A&F University, Yangling, China
| | - Xiaodong Xia
- College of Food Science and Engineering, Northwest A&F University, Yangling, China
- Sino-US Joint Research Center for Food Safety, Northwest A&F University, Yangling, China
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28
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Rosas-Burgos EC, Burgos-Hernández A, Noguera-Artiaga L, Kačániová M, Hernández-García F, Cárdenas-López JL, Carbonell-Barrachina ÁA. Antimicrobial activity of pomegranate peel extracts as affected by cultivar. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2017; 97:802-810. [PMID: 27173758 DOI: 10.1002/jsfa.7799] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 04/30/2016] [Accepted: 05/06/2016] [Indexed: 05/20/2023]
Abstract
BACKGROUND Some studies have reported that different parts of the pomegranate fruit, especially the peel, may act as potential antimicrobial agents and thus might be proposed as a safe natural alternative to synthetic antimicrobial agents. The high tannin content, especially punicalagin, found in pomegranate extracts, has been reported as the main compound responsible for such antimicrobial activity. Because the pomegranate peel chemical composition may vary with the type of cultivar (sweet, sour-sweet and sour), pomegranates may also differ with respect to their antimicrobial capacity. RESULTS The extract from PTO8 pomegranate cultivar peel had the highest antimicrobial activity, as well as the highest punicalagins (α and β) and ellagic acid concentrations. In the results obtained from both antibacterial and antifungal activity studies, the sour-sweet pomegranate cultivar PTO8 showed the best antimicrobial activity, and the highest ellagic acid concentrations. CONCLUSION The results of the present study suggest that ellagic acid content has a significant influence on the antimicrobial activity of the pomegranate extracts investigated. The pomegranate peel of the PTO8 cultivar is a good source of antifungal and antibacterial compounds, and may represent an alternative to antimicrobial agents of synthetic origin. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Ema C Rosas-Burgos
- Grupo Calidad y Seguridad Alimentaria, Departamento de Tecnología Agroalimentaria, Escuela Politécnica Superior de Orihuela (EPSO), Universidad Miguel Hernández de Elche (UMH), Ctra. Beniel, km 3.2, E-03312, Orihuela, Alicante, Spain
- Departamento de Investigación y Posgrado en Alimentos, Universidad de Sonora, Blvd Luis Encinas y Rosales s/n, Col. Centro, CP 83000, Hermosillo, Sonora, México
| | - Armando Burgos-Hernández
- Grupo Calidad y Seguridad Alimentaria, Departamento de Tecnología Agroalimentaria, Escuela Politécnica Superior de Orihuela (EPSO), Universidad Miguel Hernández de Elche (UMH), Ctra. Beniel, km 3.2, E-03312, Orihuela, Alicante, Spain
- Departamento de Investigación y Posgrado en Alimentos, Universidad de Sonora, Blvd Luis Encinas y Rosales s/n, Col. Centro, CP 83000, Hermosillo, Sonora, México
| | - Luis Noguera-Artiaga
- Grupo Calidad y Seguridad Alimentaria, Departamento de Tecnología Agroalimentaria, Escuela Politécnica Superior de Orihuela (EPSO), Universidad Miguel Hernández de Elche (UMH), Ctra. Beniel, km 3.2, E-03312, Orihuela, Alicante, Spain
| | - Miroslava Kačániová
- Department of Microbiology, Faculty of Biotechnology and Food Science, Tr. A. Hlinku 2, Slovak University of Agriculture in Nitra, 949 76, Nitra, Slovak Republic
| | - Francisca Hernández-García
- Grupo de Fruticultura y Técnicas de Producción, Departamento de Producción Vegetal y Microbiología, EPSO, UMH, Ctra. Beniel, km 3.2, E-03312, Orihuela, Alicante, Spain
| | - José L Cárdenas-López
- Departamento de Investigación y Posgrado en Alimentos, Universidad de Sonora, Blvd Luis Encinas y Rosales s/n, Col. Centro, CP 83000, Hermosillo, Sonora, México
| | - Ángel A Carbonell-Barrachina
- Grupo Calidad y Seguridad Alimentaria, Departamento de Tecnología Agroalimentaria, Escuela Politécnica Superior de Orihuela (EPSO), Universidad Miguel Hernández de Elche (UMH), Ctra. Beniel, km 3.2, E-03312, Orihuela, Alicante, Spain
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29
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Ferreira ICFR, Martins N, Barros L. Phenolic Compounds and Its Bioavailability: In Vitro Bioactive Compounds or Health Promoters? ADVANCES IN FOOD AND NUTRITION RESEARCH 2017; 82:1-44. [PMID: 28427530 DOI: 10.1016/bs.afnr.2016.12.004] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Botanical preparations present a widespread and secular history of use. In fact, natural matrices possess a rich pool of phytochemicals, with promising biological effects. Among them, phenolic compounds have revealed to confer very important attributes to improve the well-being and longevity of worldwide population. Numerous in vitro studies have been carried out evaluating the wide spectrum of bioactivities of phenolic compounds, including its health effects, but through in vivo experiments some of these previous results cannot be properly confirmed, and considerable variations are observed. Pharmacokinetic parameters, including the assessment of bioavailability and bioefficacy of phenolic compounds, still continue to be largely investigated and considered a great hot topic among the food science and technology researchers. Thus, based on these crucial aspects, this chapter aims to provide an extensive approach about the question of the bioavailability of phenolic compounds, describing its biosynthetic routes and related mechanisms of action; to focus on the current facts and existing controversies, highlighting the importance of in vivo studies and the impact of phenolic compounds on the quality of life and longevity.
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Affiliation(s)
- Isabel C F R Ferreira
- Mountain Research Centre (CIMO), ESA, Polytechnic Institute of Bragança, Bragança, Portugal.
| | - Natália Martins
- Mountain Research Centre (CIMO), ESA, Polytechnic Institute of Bragança, Bragança, Portugal
| | - Lillian Barros
- Mountain Research Centre (CIMO), ESA, Polytechnic Institute of Bragança, Bragança, Portugal
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30
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Mphahlele RR, Fawole OA, Makunga NP, Opara UL. Effect of drying on the bioactive compounds, antioxidant, antibacterial and antityrosinase activities of pomegranate peel. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2016; 16:143. [PMID: 27229852 PMCID: PMC4881059 DOI: 10.1186/s12906-016-1132-y] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 05/18/2016] [Indexed: 11/13/2022]
Abstract
BACKGROUND The use of pomegranate peel is highly associated with its rich phenolic concentration. Series of drying methods are recommended since bioactive compounds are highly sensitive to thermal degradation. The study was conducted to evaluate the effects of drying on the bioactive compounds, antioxidant as well as antibacterial and antityrosinase activities of pomegranate peel. METHODS Dried pomegranate peels with the initial moisture content of 70.30 % wet basis were prepared by freeze and oven drying at 40, 50 and 60 °C. Difference in CIE-LAB, chroma (C*) and hue angle (h°) were determined using colorimeter. Individual polyphenol retention was determined using LC-MS and LC-MS(E) while total phenolics concentration (TPC), total flavonoid concentration (TFC), total tannins concentration (TTC) and vitamin C concentration were measured using colorimetric methods. The antioxidant activity was measured by radical scavenging activity (RSA) and ferric reducing antioxidant power (FRAP). Furthermore, the antibacterial activity of methanolic peel extracts were tested on Gram negative (Escherichia coli and Klebsiella pneumonia) and Gram positive bacteria (Staphylococcus aureus and Bacillus subtilis) using the in vitro microdilution assays. Tyrosinase enzyme inhibition was investigated against monophenolase (tyrosine) and diphenolase (DOPA), with arbutin as positive controls. RESULTS Oven drying at 60 °C resulted in high punicalin concentration (888.04 ± 141.03 mg CE/kg dried matter) along with poor red coloration (high hue angle). Freeze dried peel contained higher catechin concentration (674.51 mg/kg drying matter) + catechin and -epicatechin (70.56 mg/kg drying matter) compared to oven dried peel. Furthermore, freeze dried peel had the highest total phenolic, tannin and flavonoid concentrations compared to oven dried peel over the temperature range studied. High concentration of vitamin C (31.19 μg AAE/g dried matter) was observed in the oven dried (40 °C) pomegranate peel. Drying at 50 °C showed the highest inhibitory activity with the MIC values of 0.10 mg/ml against Gram positive (Staphylococcus aureus and Bacillus subtili. Likewise, the extracts dried at 50 °C showed potent inhibitory activity concentration (22.95 mg/ml) against monophenolase. Principal component analysis showed that the peel colour characteristics and bioactive compounds isolated the investigated drying method. CONCLUSIONS The freeze and oven dried peel extracts exhibited a significant antibacterial and antioxidant activities. The freeze drying method had higher total phenolic, tannin and flavonoid concentration therefore can be explored as a feasible method for processing pomegranate peel to ensure retention of the maximum amount of their naturally occurring bioactive compounds. TRIAL REGISTRATION Not relevant for this study.
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Affiliation(s)
- Rebogile R Mphahlele
- Postharvest Technology Research Laboratory, South African Research Chair in Postharvest Technology, Department of Horticultural Sciences, Faculty of AgriSciences, Stellenbosch University, Private Bag X1, Stellenbosch, 7602, South Africa
| | - Olaniyi A Fawole
- Postharvest Technology Research Laboratory, South African Research Chair in Postharvest Technology, Department of Horticultural Sciences, Faculty of AgriSciences, Stellenbosch University, Private Bag X1, Stellenbosch, 7602, South Africa
- Postharvest Technology Research Laboratory, South African Research Chair in Postharvest Technology, Department of Food Science, Faculty of AgriSciences, Stellenbosch University, Private Bag X1, Stellenbosch, 7602, South Africa
| | - Nokwanda P Makunga
- Department of Botany and Zoology, Faculty of Science, Stellenbosch University, Private Bag X1, Stellenbosch, 7602, South Africa
| | - Umezuruike L Opara
- Postharvest Technology Research Laboratory, South African Research Chair in Postharvest Technology, Department of Horticultural Sciences, Faculty of AgriSciences, Stellenbosch University, Private Bag X1, Stellenbosch, 7602, South Africa.
- Postharvest Technology Research Laboratory, South African Research Chair in Postharvest Technology, Department of Food Science, Faculty of AgriSciences, Stellenbosch University, Private Bag X1, Stellenbosch, 7602, South Africa.
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31
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Ekambaram SP, Perumal SS, Balakrishnan A. Scope of Hydrolysable Tannins as Possible Antimicrobial Agent. Phytother Res 2016; 30:1035-45. [PMID: 27062587 DOI: 10.1002/ptr.5616] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 03/08/2016] [Accepted: 03/08/2016] [Indexed: 11/12/2022]
Abstract
Hydrolysable tannins (HTs) are secondary metabolites from plants, which are roughly classified into gallotannins and ellagitannins having gallic acid and ellagic acid residues respectively attached to the hydroxyl group of glucose by ester linkage. The presence of hexahydroxydiphenoyl and nonahydroxyterphenoyl moieties is considered to render antimicrobial property to HTs. HTs also show considerable synergy with antibiotics. Nevertheless, they have low pharmacokinetic property. The present review presents the scope of HTs as future antimicrobial agent. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Sanmuga Priya Ekambaram
- Department of Pharmaceutical Technology, Anna University BIT Campus, Tiruchirappalli, 620 024, Tamilnadu, India
| | - Senthamil Selvan Perumal
- Department of Pharmaceutical Technology, Anna University BIT Campus, Tiruchirappalli, 620 024, Tamilnadu, India
| | - Ajay Balakrishnan
- Department of Pharmaceutical Technology, Anna University BIT Campus, Tiruchirappalli, 620 024, Tamilnadu, India
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Bassiri-Jahromi S, Katiraee F, Hajimahmoodi M, Mostafavi E, Talebi. M, Pourshafie MR. In Vitro Antifungal Activity of Various Persian Cultivars of Punica granatum L. Extracts Against Candida species. Jundishapur J Nat Pharm Prod 2015. [DOI: 10.17795/jjnpp-19754] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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Romeo FV, Ballistreri G, Fabroni S, Pangallo S, Nicosia MGLD, Schena L, Rapisarda P. Chemical Characterization of Different Sumac and Pomegranate Extracts Effective against Botrytis cinerea Rots. Molecules 2015; 20:11941-58. [PMID: 26133760 PMCID: PMC6331891 DOI: 10.3390/molecules200711941] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 06/18/2015] [Accepted: 06/23/2015] [Indexed: 11/21/2022] Open
Abstract
Pomegranate (Punica granatum L.) peel and sumac (Rhus coriaria L.) fruit and leaf extracts were chemically characterized and their ability to inhibit table grape (cv. Italia) rots caused by Botrytis cinerea was evaluated on artificially inoculated berries. Different extraction methods were applied and extracts were characterized through Ultra Fast High Performance Liquid Chromatography coupled to Photodiode array detector and Electrospray ionization Mass spectrometer (UPLC-PDA-ESI/MSn) for their phenol and anthocyanin contents. The concentrated pomegranate peel extract (PGE-C) was the richest in phenols (66.97 g gallic acid equivalents/kg) while the concentrated sumac extract from fruits (SUF-C) showed the highest anthocyanin amount (171.96 mg cyanidin 3-glucoside equivalents/kg). Both phenolic and anthocyanin profile of pomegranate and sumac extracts were quite different: pomegranate extract was rich in cyanidin 3-glucoside, pelargonidin 3-glucoside and ellagic acid derivatives, while sumac extract was characterized by 7-methyl-cyanidin 3-galactoside and gallic acid derivatives. The concentrated extracts from both pomegranate peel and sumac leaves significantly reduced the development of Botrytis rots. In particular, the extract from pomegranate peel completely inhibited the pathogen at different intervals of time (0, 12, and 24 h) between treatment and pathogen inoculation on fruits maintained at 22–24 °C and high relative humidity (RH). This extract may represent a valuable alternative to control postharvest fungal rots in view of its high efficacy because of the low cost of pomegranate peel, which is a waste product of processing factories.
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Affiliation(s)
- Flora V Romeo
- Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CRA)-Centro di Ricerca per l'Agrumicoltura e le Colture Mediterranee (CRA-ACM), Corso Savoia 190, Acireale (CT) 95024, Italy.
| | - Gabriele Ballistreri
- Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CRA)-Centro di Ricerca per l'Agrumicoltura e le Colture Mediterranee (CRA-ACM), Corso Savoia 190, Acireale (CT) 95024, Italy.
| | - Simona Fabroni
- Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CRA)-Centro di Ricerca per l'Agrumicoltura e le Colture Mediterranee (CRA-ACM), Corso Savoia 190, Acireale (CT) 95024, Italy.
| | - Sonia Pangallo
- Dipartimento di Agraria, Università Mediterranea di Reggio Calabria, Località Feo di Vito, Reggio Calabria 89122, Italy.
| | - Maria Giulia Li Destri Nicosia
- Dipartimento di Agraria, Università Mediterranea di Reggio Calabria, Località Feo di Vito, Reggio Calabria 89122, Italy.
| | - Leonardo Schena
- Dipartimento di Agraria, Università Mediterranea di Reggio Calabria, Località Feo di Vito, Reggio Calabria 89122, Italy.
| | - Paolo Rapisarda
- Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CRA)-Centro di Ricerca per l'Agrumicoltura e le Colture Mediterranee (CRA-ACM), Corso Savoia 190, Acireale (CT) 95024, Italy.
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Fraternale D, Ricci D, Verardo G, Gorassini A, Stocchi V, Sestili P. Activity of Vitis vinifera Tendrils Extract Against Phytopathogenic Fungi. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501000661] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The in vitro antifungal activity was determined of an ethanolic extract of Vitis vinifera L. tendrils (TVV) against ten plant pathogenic fungi, using the agar dilution method; activity was shown against all tested fungi. Fusarium species were the most sensitive with MIC values ranging from 250 to 300 ppm, while the basidiomycete fungus Rhizoctonia solani was the most resistant, with a MIC value of 500 ppm. Electrospray ionization tandem mass spectrometry (ESI-MSn) was used to obtain qualitative information on the main components of TVV. The high amount of polyphenolic compounds contained in TVV is likely to contribute significantly to its antifungal activity.
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Affiliation(s)
- Daniele Fraternale
- Department of Biomolecular Sciences, University of Urbino “Carlo Bo”, Urbino, Italy
| | - Donata Ricci
- Department of Biomolecular Sciences, University of Urbino “Carlo Bo”, Urbino, Italy
| | - Giancarlo Verardo
- Department of Chemistry, Physics and Environment, University of Udine, Udine, Italy
| | - Andrea Gorassini
- Department of History and Preservation of Cultural Heritage, University of Udine, Udine, Italy
| | - Vilberto Stocchi
- Department of Biomolecular Sciences, University of Urbino “Carlo Bo”, Urbino, Italy
| | - Piero Sestili
- Department of Biomolecular Sciences, University of Urbino “Carlo Bo”, Urbino, Italy
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Orgil O, Schwartz E, Baruch L, Matityahu I, Mahajna J, Amir R. The antioxidative and anti-proliferative potential of non-edible organs of the pomegranate fruit and tree. Lebensm Wiss Technol 2014. [DOI: 10.1016/j.lwt.2014.03.030] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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36
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Punicalagin inhibits Salmonella virulence factors and has anti-quorum-sensing potential. Appl Environ Microbiol 2014; 80:6204-11. [PMID: 25085489 DOI: 10.1128/aem.01458-14] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Punicalagin, an essential component of pomegranate rind, has been demonstrated to possess antimicrobial activity against several food-borne pathogens, but its activity on the virulence of pathogens and its anti-quorum-sensing (anti-QS) potential have been rarely reported. This study investigated the efficacy of subinhibitory concentrations of punicalagin on Salmonella virulence factors and QS systems. A broth microdilution method was used to determine the MICs of punicalagin for 10 Salmonella strains. Motility assay and quantitative reverse transcription (RT)-PCR were performed to evaluate the effects of punicalagin on the virulence attributes and QS-related genes of Salmonella. The MICs of punicalagin for several Salmonella strains ranged from 250 to 1,000 μg/ml. Motility assays showed that punicalagin, at 1/16× MIC and 1/32× MIC, significantly decreased bacterial swimming and swarming motility, which corresponded to downregulation of the motility-related genes (fliA, fliY, fljB, flhC, and fimD) in RT-PCR assays. RT-PCR also revealed that punicalagin downregulated the expression of most of the selected genes involved in Salmonella virulence. Moreover, a QS inhibition assay indicated that punicalagin dose dependently inhibited the production of violacein by Chromobacterium violaceum and repressed the expression of QS-related genes (sdiA and srgE) in Salmonella. In addition, punicalagin significantly reduced Salmonella invasion of colonic cells (P<0.01) with no impact on adhesion. These findings suggest that punicalagin has the potential to be developed as an alternative or supplemental agent for prevention of Salmonella infection.
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Fan L, Guo Y, Zhi X, Yu X, Xu H. Stereoselective synthesis of 2α-Chloropicropodophyllotoxins and insecticidal activity of their esters against oriental armyworm, Mythimna separata walker. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:3726-3733. [PMID: 24724803 DOI: 10.1021/jf405316w] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
As part of ongoing efforts to discover new natural-product-based insecticidal agents, in the present study, an efficient method for the stereoselective α-chlorination at the C-2 position of 2'(2',6')-(di)halogenopodophyllotoxin derivatives was first developed. Subsequently, a series of novel esters of 2α-chloro-2'(2',6')-(di)halogenopicropodophyllotoxin with modified C, D, and E rings of podophyllotoxin were smoothly obtained. Finally, all of the title compounds were tested against the pre-third-instar larvae of oriental armyworm (Mythimna separata Walker) at 1 mg/mL. It was found that besides their 2'-halogen-substituted E ring, the stereoselective α-chlorination at the C-2 position of 2'(2',6')-(di)halogenopodophyllotoxins was also related to the chlorination reagents. Especially 2α-chloro-4α-(benzoyl)oxy-2'-chloropicropodophyllotoxin (6e) and 2α-chloro-4α-(2-chlorophenylacyl)oxy-2'-bromopicropodophyllotoxin (8f) showed the most potent insecticidal activities, with final mortality rates of >60%. For 4α-(alkylacyl)oxy derivatives of 2α-chloro-2'(2',6')-(di)halogenopicropodophyllotoxin, the effect of the length of their side chain at the C-4 position of podophyllotoxin skeleton on the insecticidal activity was not very obvious. For 4α-(arylacyl)oxy derivatives of 2α-chloro-2'-chloro/bromopicropodophyllotoxin, an electronic effect of the substituents on their phenyl ring at the C-4 position of podophyllotoxin skeleton on the insecticidal activity was observed.
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Affiliation(s)
- Lingling Fan
- Laboratory of Pharmaceutical Design and Synthesis, College of Sciences, Northwest A&F University , Yangling 712100, Shaanxi Province People's Republic of China
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Li G, Xu Y, Wang X, Zhang B, Shi C, Zhang W, Xia X. Tannin-rich fraction from pomegranate rind damages membrane of Listeria monocytogenes. Foodborne Pathog Dis 2014; 11:313-9. [PMID: 24447173 DOI: 10.1089/fpd.2013.1675] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Pomegranate rind has been reported to inhibit several foodborne pathogens, and its antimicrobial activity has been attributed mainly to its tannin fraction. This study aimed to investigate the antimicrobial activity of the tannin-rich fraction from pomegranate rind (TFPR) against Listeria monocytogenes and its mechanism of action. The tannin-related components of TFPR were analyzed by high-performance liquid chromatography and liquid chromatography-mass spectrometry, and the minimum inhibitory concentration (MIC) of TFPR was determined using the agar dilution method. Extracellular potassium concentration, the release of cell constituents, intra- and extracellular ATP concentrations, membrane potential, and intracellular pH (pHin) were measured to elucidate a possible antibacterial mechanism. Punicalagin (64.2%, g/g) and ellagic acid (3.1%, g/g) were detected in TFPR, and the MICs of TFPR were determined to be 1.25-5.0 mg/mL for different L. monocytogenes strains. Treatment with TFPR induced a decrease of the intracellular ATP concentration, an increase of the extracellular concentrations of potassium and ATP, and the release of cell constituents. A reduction of pHin and cell membrane hyperpolarization were observed after treatment. Electron microscopic observations showed that the cell membrane structures of L. monocytogenes were apparently impaired by TFPR. It is concluded that TFPR could destroy the integrity of the cell membrane of L. monocytogenes, leading to a loss of cell homeostasis. These findings indicate that TFPR has the potential to be used as a food preservative in order to control L. monocytogenes contamination in food and reduce the risk of listeriosis.
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Affiliation(s)
- Guanghui Li
- College of Food Science and Engineering, Northwest A&F University , Yangling, Shaanxi, China
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Total Antioxidative Capacity and Total Phenolic Levels in Pomegranate Husks Correlate to Several Postharvest Fruit Quality Parameters. FOOD BIOPROCESS TECH 2013. [DOI: 10.1007/s11947-013-1184-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Bakkiyaraj D, Nandhini JR, Malathy B, Pandian SK. The anti-biofilm potential of pomegranate (Punica granatum L.) extract against human bacterial and fungal pathogens. BIOFOULING 2013; 29:929-937. [PMID: 23906229 DOI: 10.1080/08927014.2013.820825] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Infectious diseases caused by bacteria and fungi are the major cause of morbidity and mortality across the globe. Multi-drug resistance in these pathogens augments the complexity and severity of the diseases. Various studies have shown the role of biofilms in multi-drug resistance, where the pathogen resides inside a protective coat made of extracellular polymeric substances. Since biofilms directly influence the virulence and pathogenicity of a pathogen, it is optimal to employ a strategy that effectively inhibits the formation of biofilm. Pomegranate is a common food and is also used traditionally to treat various ailments. This study assessed the anti-biofilm activity of a methanolic extract of pomegranate against bacterial and fungal pathogens. Methanolic extract of pomegranate was shown to inhibit the formation of biofilms by Staphylococcus aureus, methicillin resistant S. aureus, Escherichia coli, and Candida albicans. Apart from inhibiting the formation of biofilm, pomegranate extract disrupted pre-formed biofilms and inhibited germ tube formation, a virulence trait, in C. albicans. Characterization of the methanolic extract of pomegranate revealed the presence of ellagic acid (2,3,7,8-tetrahydroxy-chromeno[5,4,3-cde]chromene-5,10-dione) as the major component. Ellagic acid is a bioactive tannin known for its antioxidant, anticancer, and anti-inflammatory properties. Further studies revealed the ability of ellagic acid to inhibit the growth of all species in suspension at higher concentrations (>75 μg ml(-1)) and biofilm formation at lower concentrations (<40 μg ml(-1)) which warrants further investigation of the potential of ellagic acid or peel powders of pomegranate for the treatment of human ailments.
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Dey D, Debnath S, Hazra S, Ghosh S, Ray R, Hazra B. Pomegranate pericarp extract enhances the antibacterial activity of ciprofloxacin against extended-spectrum β-lactamase (ESBL) and metallo-β-lactamase (MBL) producing Gram-negative bacilli. Food Chem Toxicol 2012; 50:4302-9. [PMID: 22982804 DOI: 10.1016/j.fct.2012.09.001] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Revised: 08/28/2012] [Accepted: 09/03/2012] [Indexed: 12/17/2022]
Abstract
A methanolic extract of Punica granatum (pomegranate) fruit pericarp (PGME) was tested in combination with ciprofloxacin against extended-spectrum β-lactamase (ESBL) producing Escherichia coli, Klebsiella pneumoniae, and metallo-β-lactamase (MBL) producing Pseudomonas aeruginosa, which were screened for their resistance profile against fluoroquinolone antibiotics. The minimum inhibitory concentrations (MIC) of ciprofloxacin and PGME, alone, were determined, and synergy of ciprofloxacin-PGME combinations evaluated by checkerboard assay and fractional inhibitory concentration (FIC). Nineteen out of forty-nine strains exhibited synergy with ciprofloxacin (FIC of 0.125-0.5 for ciprofloxacin) further verified by agar-well assay. This could be due to the bacterial efflux pump inhibitor (EPI) activity of the polyphenolic constituents of PGME. However, the isolates exhibiting a high level of ciprofloxacin resistance did not respond to ciprofloxacin-PGME combinations, which could be due to target site modification not influenced further by EPI activity of PGME. Again, some strains were sensitive or weakly resistant to ciprofloxacin, which exhibited 'indifference' to the combination, probably due to a lack of over-expressed efflux mechanism. Thus, a synergy of a ciprofloxacin-PGME combination was demonstrated for the first time against ESBL- and MBL-producing Gram-negative bacilli, and the efficacy of an existing drug improved with the help of an inexpensive alternative therapy.
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Affiliation(s)
- Diganta Dey
- Department of Pharmaceutical Technology, Jadavpur University, Kolkata 700032, India
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