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Simpson M, Hendrickson DA, Hyatt DR, Rao S. Comparison of In Vitro Bacterial Susceptibility to Common and Novel Equine Wound Care Dressings. Animals (Basel) 2024; 14:776. [PMID: 38473161 DOI: 10.3390/ani14050776] [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: 01/15/2024] [Revised: 02/26/2024] [Accepted: 02/28/2024] [Indexed: 03/14/2024] Open
Abstract
Antimicrobial resistance is becoming a problem of concern in the veterinary field, necessitating the use of effective topical treatments to aid the healing of wounds. Honey has been used for thousands of years for its medicinal properties, but in recent years medical-grade Manuka honey has been used to treat infected wounds. The goal of this study was to determine the relative susceptibility of four common equine wound pathogens to ten different types of antimicrobial agents based on the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC). The pathogens studied include ATCC lab-acclimated Pseudomonas aeruginosa, Escherichia coli, and methicillin-resistant Staphylococcus aureus and one from an equine sample submitted to the Colorado State Veterinary Diagnostic Laboratory (Streptococcus equi ssp. zooepidemicus (Streptococcus zooepidemicus)). An additional goal of the study was to describe the comparison of bactericidal activity of medical-grade Manuka honey, local honey, and commercial, food-grade honey to other commonly used wound dressings (20% hypertonic saline, silver sulfadiazine cream, PHMB gauze, and PHMB foam). The objective is to provide veterinary practitioners with comparative data on the use of a variety of antimicrobial dressings for inhibiting the growth of common wound bacteria. MIC and MBC for Manuka, store, and local honeys were comparable to those of sterile gauze, sugar, and hypertonic saline. Across bacterial species, local honey proved to have more bactericidal activity when compared to Manuka honey and commercial, food-grade honey. The MIC and MBC for PHMB gauze and foam was consistently at a higher dilution compared to the other antimicrobials. The majority of antimicrobials exhibited stronger inhibitory and bactericidal activity against a Streptococcus zooepidemicus isolate obtained from a wound compared to other bacteria that were ATCC lab-acclimated. Additional research for in vivo applications needs to be done to see whether differences exist in effective wound management.
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Affiliation(s)
- Merrill Simpson
- Department of Clinical Sciences, Colorado State University, Fort Collins, CO 80523, USA
| | - Dean A Hendrickson
- Department of Clinical Sciences, Colorado State University, Fort Collins, CO 80523, USA
| | - Doreene R Hyatt
- Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, CO 80523, USA
| | - Sangeeta Rao
- Department of Clinical Sciences, Colorado State University, Fort Collins, CO 80523, USA
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Khataybeh B, Jaradat Z, Ababneh Q. Anti-bacterial, anti-biofilm and anti-quorum sensing activities of honey: A review. JOURNAL OF ETHNOPHARMACOLOGY 2023; 317:116830. [PMID: 37400003 DOI: 10.1016/j.jep.2023.116830] [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] [Received: 02/15/2023] [Revised: 05/31/2023] [Accepted: 06/20/2023] [Indexed: 07/05/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Man has used honey to treat diseases since ancient times, perhaps even before the history of medicine itself. Several civilizations have utilized natural honey as a functional and therapeutic food to ward off infections. Recently, researchers worldwide have been focusing on the antibacterial effects of natural honey against antibiotic-resistant bacteria. AIM OF THE STUDY This review aims to summarize research on the use of honey properties and constituents with their anti-bacterial, anti-biofilm, and anti-quorum sensing mechanisms of action. Further, honey's bacterial products, including probiotic organisms and antibacterial agents which are produced to curb the growth of other competitor microorganisms is addressed. MATERIALS AND METHODS In this review, we have provided a comprehensive overview of the antibacterial, anti-biofilm, and anti-quorum sensing activities of honey and their mechanisms of action. Furthermore, the review addressed the effects of antibacterial agents of honey from bacterial origin. Relevant information on the antibacterial activity of honey was obtained from scientific online databases such as Web of Science, Google Scholar, ScienceDirect, and PubMed. RESULTS Honey's antibacterial, anti-biofilm, and anti-quorum sensing activities are mostly attributed to four key components: hydrogen peroxide, methylglyoxal, bee defensin-1, and phenolic compounds. The performance of bacteria can be altered by honey components, which impact their cell cycle and cell morphology. To the best of our knowledge, this is the first review that specifically summarizes every phenolic compound identified in honey along with their potential antibacterial mechanisms of action. Furthermore, certain strains of beneficial lactic acid bacteria such as Bifidobacterium, Fructobacillus, and Lactobacillaceae, as well as Bacillus species can survive and even grow in honey, making it a potential delivery system for these agents. CONCLUSION Honey could be regarded as one of the best complementary and alternative medicines. The data presented in this review will enhance our knowledge of some of honey's therapeutic properties as well as its antibacterial activities.
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Affiliation(s)
- Batool Khataybeh
- Department of Nutrition and Food Technology, Jordan University of Science and Technology, Irbid, 22110, Jordan
| | - Ziad Jaradat
- Department of Biotechnology and Genetic Engineering, Jordan University of Science and Technology, Irbid, 22110, Jordan.
| | - Qutaiba Ababneh
- Department of Biotechnology and Genetic Engineering, Jordan University of Science and Technology, Irbid, 22110, Jordan
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Li Z, Han C, Wang Z, Li Z, Ruan L, Lin H, Zhou C. Black soldier fly pulp in the diet of golden pompano: Effect on growth performance, liver antioxidant and intestinal health. FISH & SHELLFISH IMMUNOLOGY 2023; 142:109156. [PMID: 37827247 DOI: 10.1016/j.fsi.2023.109156] [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: 09/03/2023] [Revised: 10/01/2023] [Accepted: 10/10/2023] [Indexed: 10/14/2023]
Abstract
Black soldier fly (Hermetia illucens) has been widely researched as a protein source for fish meal replacement in aquaculture, but few studies have focused on its potential as a feed additive for growth and immune enhancement. We conducted a 56-day culture experiment to determine the impact of feed addition of black soldier fly pulp (BSFP, with 86.2% small peptides in dry basis) on growth performance, plasma biochemistry, liver antioxidant levels, intestinal immunity, digestion and microbiota of juvenile golden pompano (Trachinotus ovatus, 5.63 ± 0.02 g). BSFP was added to the basal diet at 0%, 1%, 3%, 5%, 7% and 9% (named Control, BSFP-1, BSFP-3, BSFP-5, BSFP-7, BSFP-9), respectively. BSFP increased the weight gain rate, specific growth rate, protein efficiency ratio and reduced the feed conversion rate of juvenile T. ovatus, the optimal growth performance was reached at BSFP-1, after which a negative feedback phenomenon was observed. Low levels of BSFP upregulated the expression of hepatic antioxidant, intestinal tight junctions, anti-inflammatory related genes and enhanced antioxidant, immune and intestinal digestive enzyme activities, which simultaneously reduced hepatic malondialdehyde and plasma aspartate transaminase and alanine aminotransferase concentrations. However, at BSFP-7, catalase activity was significantly reduced, while NF-κB p65 and pro-inflammatory cytokines transcription was significantly enhanced (P < 0.05). The results suggest that high doses of BSFP addition may damage fish health by inhibiting small peptide uptake, decreasing the activity of antioxidant enzyme and activating the canonical NF-κB pathway. Conversely, low doses of BSFP enhanced intestinal tight junction protein transcription, digestive enzyme activity and immune performance, inhibited pathogenic microbiota, while enhancing liver antioxidant capacity, which was associated with activated Nrf2-Keap1 pathway and suppressed NF-κB pathway, showing its potential as a feed additive to aquafeeds.
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Affiliation(s)
- Zuzhe Li
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China; College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Chengzong Han
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China; College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Zhanzhan Wang
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China
| | - Zhenyu Li
- Guangdong Green Coral Bio-Technology Co., Ltd, Dongguan, 523000, China
| | - Leshan Ruan
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China; College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Heizhao Lin
- Shenzhen Base of South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shenzhen, 518121, China; Key Laboratory of Efficient Utilization and Processing of Marine Fishery Resources of Hainan Province, Sanya, 572019, China
| | - Chuanpeng Zhou
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China; Key Laboratory of Efficient Utilization and Processing of Marine Fishery Resources of Hainan Province, Sanya, 572019, China.
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Liang J, Adeleye M, Onyango LA. Combinatorial efficacy of Manuka honey and antibiotics in the in vitro control of staphylococci and their small colony variants. Front Cell Infect Microbiol 2023; 13:1219984. [PMID: 37928190 PMCID: PMC10622673 DOI: 10.3389/fcimb.2023.1219984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 09/04/2023] [Indexed: 11/07/2023] Open
Abstract
Introduction Staphylococci are among the list of problematic bacteria contributing to the global antibiotic resistance (ABR) crisis. Their ability to adopt the small colony variant (SCV) phenotype, induced by prolonged antibiotic chemotherapy, complicates staphylococcal infection control options. Novel and alternative approaches are needed to tackle staphylococcal infections and curb ABR. Manuka honey (MH), a non-antibiotic alternative is recognized for its unique antibacterial activity based on its methylglyoxal (MGO) component. Methods In this study, MH (MGO 830+) was tested in combination with gentamicin (GEN), rifampicin (RIF), or vancomycin (VA) against staphylococcal wildtype (WT) and SCVs. To our knowledge, there are no current studies in the literature documenting the effects of MH on staphylococcal SCVs. While Staphylococcus aureus is well-studied for its international ABR burden, limited data exists demonstrating the effects of MH on S. epidermidis and S. lugdunensis whose pathogenic relevance and contribution to ABR is also rising. Results & discussion The three staphylococci were most susceptible to RIF (0.06-0.24 μg/ml), then GEN (0.12-0.49 μg/ml), and lastly VA (0.49-0.96 μg/ml). The MICs of MH were 7%, 7-8%, and 6-7% (w/v), respectively. Fractional inhibitory concentration (FIC) evaluations showed that the combined MH + antibiotic effect was either additive (FICI 1-2), or partially synergistic (FICI >0.5-1). While all three antibiotics induced SCVs in vitro, stable SCVs were observed in GEN treatments only. The addition of MH to these GEN-SCV-induction analyses resulted in complete suppression of SCVs (p<0.001) in all three staphylococci, suggesting that MH's antibacterial properties interfered with GEN's SCV induction mechanisms. Moreover, the addition of MH to growth cultures of recovered stable SCVs resulted in the inhibition of SCV growth by at least 99%, indicating MH's ability to prevent subsequent SCV growth. These in vitro analyses demonstrated MH's broad-spectrum capabilities not only in improving WT staphylococci susceptibility to the three antibiotics, but also mitigated the development and subsequent growth of their SCV phenotypes. MH in combination with antibiotics has the potential to not only resensitize staphylococci to antibiotics and consequently require less antibiotic usage, but in instances where prolonged chemotherapy is employed, the development and growth of SCVs would be hampered, providing a better clinical outcome, all of which mitigate ABR.
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Guedes GMDM, Freitas AS, Pinheiro RM, Pereira VC, Melgarejo CMA, de Araujo ES, Ribeiro KVC, Bandeira SP, Cordeiro RDA, Rocha MFG, Sidrim JJC, Castelo-Branco DDSCM. Antibiofilm activity of promethazine, deferiprone, and Manuka honey in an ex vivo wound model. Lett Appl Microbiol 2023; 76:ovad119. [PMID: 37791895 DOI: 10.1093/lambio/ovad119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 09/08/2023] [Accepted: 10/02/2023] [Indexed: 10/05/2023]
Abstract
This study evaluated the antibiofilm activity of promethazine, deferiprone, and Manuka honey against Staphylococcus aureus and Pseudomonas aeruginosa in vitro and ex vivo in a wound model on porcine skin. The minimum inhibitory concentrations (MICs) and the effects of the compounds on biofilms were evaluated. Then, counting colony-forming units (CFUs) and confocal microscopy were performed on biofilms cultivated on porcine skin for evaluation of the compounds. For promethazine, MICs ranging from 97.66 to 781.25 µg/ml and minimum biofilm eradication concentration (MBEC) values ranging from 195.31 to 1562.5 µg/ml were found. In addition to reducing the biomass of both species' biofilms. As for deferiprone, the MICs were 512 and >1024 µg/ml, the MBECs were ≥1024 µg/ml, and it reduced the biomass of biofilms. Manuka honey had MICs of 10%-40%, MBECs of 20 to >40% and reduced the biomass of S. aureus biofilms only. Concerning the analyses in the ex vivo model, the compounds reduced (P < .05) CFU counts for both bacterial species, altering the biofilm architecture. The action of the compounds on biofilms in in vitro and ex vivo tests raises the possibility of using them against biofilm-associated wounds. However, further studies are needed to characterize the mechanisms of action and their effectiveness on biofilms in vivo.
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Affiliation(s)
- Gláucia Morgana de Melo Guedes
- Department of Pathology & Legal Medicine, Postgraduate Program in Medical Microbiology, Group of Applied Medical Microbiology, Federal University of Ceará, Rua Coronel Nunes de Melo, 1315 - Rodolfo Teófilo - CEP 60430-275, Fortaleza, Ceará, Brazil
- Department of Pathology & Legal Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Rua Coronel, Nunes de Melo, 1315 - Rodolfo Teófilo - CEP 60430-275, Fortaleza, Ceará, Brazil
| | - Alyne Soares Freitas
- Department of Pathology & Legal Medicine, Postgraduate Program in Medical Microbiology, Group of Applied Medical Microbiology, Federal University of Ceará, Rua Coronel Nunes de Melo, 1315 - Rodolfo Teófilo - CEP 60430-275, Fortaleza, Ceará, Brazil
| | - Rodrigo Machado Pinheiro
- Department of Pathology & Legal Medicine, Postgraduate Program in Medical Microbiology, Group of Applied Medical Microbiology, Federal University of Ceará, Rua Coronel Nunes de Melo, 1315 - Rodolfo Teófilo - CEP 60430-275, Fortaleza, Ceará, Brazil
| | - Vinicius Carvalho Pereira
- Department of Pathology & Legal Medicine, Postgraduate Program in Medical Microbiology, Group of Applied Medical Microbiology, Federal University of Ceará, Rua Coronel Nunes de Melo, 1315 - Rodolfo Teófilo - CEP 60430-275, Fortaleza, Ceará, Brazil
| | - Carliane Melo Alves Melgarejo
- Department of Pathology & Legal Medicine, Postgraduate Program in Medical Microbiology, Group of Applied Medical Microbiology, Federal University of Ceará, Rua Coronel Nunes de Melo, 1315 - Rodolfo Teófilo - CEP 60430-275, Fortaleza, Ceará, Brazil
| | - Emanuela Silva de Araujo
- Department of Pathology & Legal Medicine, Postgraduate Program in Medical Microbiology, Group of Applied Medical Microbiology, Federal University of Ceará, Rua Coronel Nunes de Melo, 1315 - Rodolfo Teófilo - CEP 60430-275, Fortaleza, Ceará, Brazil
| | - Késia Veras Costa Ribeiro
- Department of Pathology & Legal Medicine, Postgraduate Program in Medical Microbiology, Group of Applied Medical Microbiology, Federal University of Ceará, Rua Coronel Nunes de Melo, 1315 - Rodolfo Teófilo - CEP 60430-275, Fortaleza, Ceará, Brazil
| | - Silviane Praciano Bandeira
- Department of Pathology & Legal Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Rua Coronel, Nunes de Melo, 1315 - Rodolfo Teófilo - CEP 60430-275, Fortaleza, Ceará, Brazil
| | - Rossana de Aguiar Cordeiro
- Department of Pathology & Legal Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Rua Coronel, Nunes de Melo, 1315 - Rodolfo Teófilo - CEP 60430-275, Fortaleza, Ceará, Brazil
| | - Marcos Fábio Gadelha Rocha
- Department of Pathology & Legal Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Rua Coronel, Nunes de Melo, 1315 - Rodolfo Teófilo - CEP 60430-275, Fortaleza, Ceará, Brazil
- Postgraduate Program in Veterinary Sciences, School of Veterinary, State University of Ceará, Avenida Dr. Silas Munguba, 1700 - Itaperi - CEP 60714-903, Fortaleza, Ceará, Brazil
| | - José Júlio Costa Sidrim
- Department of Pathology & Legal Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Rua Coronel, Nunes de Melo, 1315 - Rodolfo Teófilo - CEP 60430-275, Fortaleza, Ceará, Brazil
| | - Débora de Souza Collares Maia Castelo-Branco
- Department of Pathology & Legal Medicine, Postgraduate Program in Medical Microbiology, Group of Applied Medical Microbiology, Federal University of Ceará, Rua Coronel Nunes de Melo, 1315 - Rodolfo Teófilo - CEP 60430-275, Fortaleza, Ceará, Brazil
- Department of Pathology & Legal Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Rua Coronel, Nunes de Melo, 1315 - Rodolfo Teófilo - CEP 60430-275, Fortaleza, Ceará, Brazil
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Mackin C, Dahiya D, Nigam PS. Honey as a Natural Nutraceutical: Its Combinational Therapeutic Strategies Applicable to Blood Infections-Septicemia, HIV, SARS-CoV-2, Malaria. Pharmaceuticals (Basel) 2023; 16:1154. [PMID: 37631069 PMCID: PMC10459786 DOI: 10.3390/ph16081154] [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: 07/14/2023] [Revised: 07/29/2023] [Accepted: 08/10/2023] [Indexed: 08/27/2023] Open
Abstract
Honey is a natural substance that has existed alongside humanity since the time of antiquity, acting then as a source of nutrition, as well as a source of medicinal aid for people. Ancient civilizations from multiple nations of the world, from ancient China to ancient Greece and Egypt, utilized the supposed healing properties of honey to treat lacerations and wounds, as well as for internal pathologies such as intestinal disease. At present, honey has entered the modern scientific research program in search of novel antibiotics. In recent research, honey has demonstrated its potential use for static and/or cidal effects on microbial strains which are becoming resistant to chemical antibiotics. Additionally, the use of honey as an agent of treatment for more severe infections, namely blood infections pertaining to septicemia, HIV, and SARS-CoV-2, as well as parasitic infections such as malaria, have also been investigated in recent years. In this article, the literature has been reviewed on some of the therapeutic properties of natural nutraceutical honey, where it has been observed to act as a potential ameliorating agent; reducing the severity of such conditions that may amplify a disease, as well as reducing the progression of the disease and its symptoms.
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Affiliation(s)
- Caoimhin Mackin
- Biomedical Sciences Research Institute, Ulster University, Coleraine BT52 1SA, UK
| | | | - Poonam Singh Nigam
- Biomedical Sciences Research Institute, Ulster University, Coleraine BT52 1SA, UK
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Qin J, Yu L, Peng F, Ye X, Li G, Sun C, Cheng F, Peng C, Xie X. Tannin extracted from Penthorum chinense Pursh, a potential drug with antimicrobial and antibiofilm effects against methicillin-sensitive Staphylococcus aureus and methicillin-resistant Staphylococcus aureus. Front Microbiol 2023; 14:1134207. [PMID: 37465024 PMCID: PMC10351983 DOI: 10.3389/fmicb.2023.1134207] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 06/13/2023] [Indexed: 07/20/2023] Open
Abstract
Staphylococcus aureus is an opportunistic pathogen. Due to the widespread use and abuse of antibiotics, various drug-resistant strains of S. aureus have emerged, with methicillin-resistant Staphylococcus aureus (MRSA) being the most prevalent. Bacterial biofilm is a significant contributor to bacterial infection and drug resistance. Consequently, bacterial biofilm formation has emerged as a therapeutic strategy. In this study, the chemical constituents, antimicrobial and antibiofilm properties of tannins isolated from Penthorum chinense Pursh (TPCP) were investigated. In vitro, TPCP exhibited antimicrobial properties. The minimum inhibitory concentrations (MIC) and minimum bactericidal concentrations (MBC) for methicillin-sensitive Staphylococcus aureus (MSSA) and MRSA were 156.25 and 312.5 μg/mL, and 312.5 and 625 μg/mL, respectively. According to the growth curves, TPCP significantly inhibited the growth of MSSA and MRSA. The results of the crystal violet biofilm assay in conjunction with confocal laser scanning and scanning electron microscopy demonstrated that TPCP destroyed preformed MSSA and MRSA biofilms. TPCP significantly decreased the secretion of exopolysaccharides and extracellular DNA. Subsequently, the mechanism was investigated using RT-PCR. Examining the expression of icaA, cidA, sigB, agrA, and sarA genes in MRSA, we discovered that TPCP inhibited biofilm formation by affecting the quorum-sensing system in bacteria. Our study demonstrates that TPCP exerts antibacterial effects by disrupting the formation of bacterial biofilms, suggesting that TPCP has clinical potential as a novel antibacterial agent for the prevention and treatment of MSSA and MRSA infections.
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Affiliation(s)
- Junyuan Qin
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Lei Yu
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Fu Peng
- Department of Pharmacology, Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, China
| | - Xin Ye
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Gangmin Li
- Department of Pharmacy, The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Luzhou, China
| | - Chen Sun
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Fang Cheng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Cheng Peng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Xiaofang Xie
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
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Raval YS, Fleming D, Mohamed A, Karau MJ, Mandrekar JN, Schuetz AN, Greenwood Quaintance KE, Beyenal H, Patel R. In Vivo Activity of Hydrogen-Peroxide Generating Electrochemical Bandage Against Murine Wound Infections. ADVANCED THERAPEUTICS 2023; 6:2300059. [PMID: 37485434 PMCID: PMC10361686 DOI: 10.1002/adtp.202300059] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Indexed: 03/06/2023]
Abstract
Biofilms formed by antibiotic-resistant bacteria in wound beds present unique challenges in terms of treating wound infections. In this work, the in vivo activity of a novel electrochemical bandage (e-bandage) composed of carbon fabric and controlled by a wearable potentiostat, designed to continuously deliver low amounts of hydrogen peroxide (H2O2) was evaluated against methicillin-resistant Staphylococcus aureus (MRSA), multidrug-resistant Pseudomonas aeruginosa (MDR-PA) and mixed-species (MRSA and MDR-PA) wound infections. Wounds created on Swiss Webster mice were infected with the above-named bacteria and biofilms allowed to establish on wound beds for 3 days. e-Bandages, which electrochemically reduce dissolved oxygen to H2O2 when polarized at -0.6 VAg/AgCl, were placed atop the infected wound bed and polarized continuously for 48 hours. Polarized e-bandage treatment resulted in significant reductions (p <0.001) of both mono-species and mixed-species wound infections. After e-bandage treatment, electron microscopy showed degradation of bacterial cells, and histopathology showed no obvious alteration to the inflammatory host response. Blood biochemistries showed no abnormalities. Taken all together, results of this work suggest that the described H2O2-producing e-bandage can effectively reduce in vivo MRSA, MDR-PA and mixed-species wound biofilms, and should be further developed as a potential antibiotic-free strategy for treatment of wound infections.
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Affiliation(s)
- Yash S. Raval
- Department of Laboratory Medicine and Division of Clinical Microbiology, Mayo Clinic, Rochester, MN
| | - Derek Fleming
- Department of Laboratory Medicine and Division of Clinical Microbiology, Mayo Clinic, Rochester, MN
| | - Abdelrhman Mohamed
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA
| | - Melissa J. Karau
- Department of Laboratory Medicine and Division of Clinical Microbiology, Mayo Clinic, Rochester, MN
| | | | - Audrey N. Schuetz
- Department of Laboratory Medicine and Division of Clinical Microbiology, Mayo Clinic, Rochester, MN
| | | | - Haluk Beyenal
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA
| | - Robin Patel
- Department of Laboratory Medicine and Division of Clinical Microbiology, Mayo Clinic, Rochester, MN
- Division of Public Health, Infectious Diseases, and Occupational Medicine, Mayo Clinic, Rochester, MN
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Majeed A, Guleria S, Sharma N, Salaria KH, Aiman F, Singh B, Gupta VK. Antioxidant capacity and combinatorial antimicrobial effects of Nardostachys jatamansi essential oil with conventional antibiotics against some drug resistant bacteria. CURRENT RESEARCH IN BIOTECHNOLOGY 2023. [DOI: 10.1016/j.crbiot.2022.100118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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10
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Preparation and Characterisation of a Cyclodextrin-Complexed Mānuka Honey Microemulsion for Eyelid Application. Pharmaceutics 2022; 14:pharmaceutics14071493. [PMID: 35890390 PMCID: PMC9324298 DOI: 10.3390/pharmaceutics14071493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 07/11/2022] [Accepted: 07/13/2022] [Indexed: 11/26/2022] Open
Abstract
Honey has been widely purported as a natural remedy due to its antimicrobial and anti-inflammatory effects. In recent years, several studies have suggested that the considerably high methylglyoxal (MGO) concentration in Mānuka honey (MH) makes it particularly effective to manage bacterial overload, such as that observed in blepharitis. However, the poor solubility, high viscosity, and osmolarity of aqueous honey solutions, especially at the high MGO concentrations studied in the literature, render the formulation of an acceptable dosage form for topical application to the eyelids challenging. Here, the antibacterial properties of raw MH and alpha-cyclodextrin (α-CD)-complexed MH were evaluated at relatively low MGO concentrations, and a liquid crystalline-forming microemulsion containing α-CD-complexed MH was formulated. After determining pH and osmolarity, ocular tolerability was assessed using human primary corneal epithelial cells and chorioallantoic membranes, while the antibacterial efficacy was further evaluated in vitro. The α-CD–MH complex had significantly greater antibacterial activity against Staphylococcus aureus than either constituent alone, which was evident even when formulated as a microemulsion. Moreover, the final formulation had a physiologically acceptable pH and osmolarity for eyelid application and was well-tolerated when diluted 1:10 with artificial tear fluid, as expected to be the case after accidental exposure to the ocular surface in the clinical setting. Thus, a safe and efficient MH dosage form was developed for topical application to the eyelids, which can potentially be used to support optimal eyelid health in the management of blepharitis.
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Naik PP, Chrysostomou D, Cinteza M, Pokorná A, Cremers NA. When time does not heal all wounds-the use of medical grade honey in wound healing: a case series. J Wound Care 2022; 31:548-558. [PMID: 35797263 DOI: 10.12968/jowc.2022.31.7.548] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE Hard-to-heal wounds can be caused by persistent infections or an excess of inflammatory cytokines, proteases and oxidants, and can severely impact the quality of life (QoL) of patients. Due to the paucity of effective treatments and increased resistance to antibiotics, new and improved therapies are required to resolve infections and to simultaneously enhance the healing trajectory. Medical grade honey (MGH) may be a novel and effective treatment approach. METHODS In this case series, we have described six cases of hard-to-heal wounds, and discussed the effects of MGH on infection, wound healing and factors influencing patient QoL (pain, odour and exudate). In all cases, the wounds had persisted for a long period, and previous treatments had been ineffective. Most of the patients had comorbidities, and the majority of the wounds were contaminated with (multiresistant) bacteria, both of which contributed to non-healing. All wounds were treated with L-Mesitran (MGH-based wound care products, Triticum Exploitatie BV, the Netherlands) either as monotherapy or as a complementary therapy. RESULTS Hard-to-heal wounds started healing, infection was controlled and QoL was strongly improved (malodour, exudate levels and pain swiftly decreased) after the application of the MGH. All wounds healed relatively quickly, considering the severity of the wounds and general health of the patients. CONCLUSION In this study, MGH was a useful alternative or complementary therapy to antibiotics and expedited the healing of hard-to-heal wounds.
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Affiliation(s)
- Piyu Parth Naik
- Saudi German Hospitals and Clinics, Department of Dermatology, Hessa Street 331 West, Al Barsha3, Exit 36 Sheikh Zayed Road, Opposite of American School, Dubai, United Arab Emirates
| | - Daniela Chrysostomou
- Wound Clinic Health@45, Linksfield Road 45, Dowerglen, Johannesburg, South Africa
| | - Mirela Cinteza
- SC Podotim Medica SRL, RO41116267, J/35/2118/2019, Moșnița Veche, Jud Timiș, Romania
| | - Andrea Pokorná
- Department of Health Sciences, Faculty of Medicine, Masaryk University, Czech Republic.,College of Polytechnics Jihlava, Jihlava, Czech Republic
| | - Niels Aj Cremers
- Triticum Exploitatie BV, Sleperweg 44, 6222NK Maastricht, the Netherlands.,Department of Gynecology and Obstetrics, Maastricht University Medical Centre, 6202 AZ Maastricht, the Netherlands
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12
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L-Mesitran Foam: Evaluation of a New Wound Care Product. Case Rep Dermatol Med 2022; 2022:4833409. [PMID: 35464882 PMCID: PMC9023218 DOI: 10.1155/2022/4833409] [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: 11/03/2021] [Revised: 03/11/2022] [Accepted: 03/28/2022] [Indexed: 12/19/2022] Open
Abstract
Chronic wounds are a health problem that has devastating consequences for patients and their quality of life. Often, chronic wounds are stuck in the inflammatory phase or burdened with an infection. Therefore, it is important to find alternative all-round wound care products that have both wound healing and antimicrobial activities. New wound care products are developed constantly, implementing the latest knowledge and advances in wound care. Honey-based wound care formulations and foam dressings are increasingly used in the clinic. L-Mesitran Foam is a novel product in which a foam dressing is precoated with medical-grade honey. Here, we describe our first experiences with L-Mesitran Foam in the clinic. In this case report, a 57-year-old woman with diabetes mellitus type 2 and hypertension presented with a chronic diabetic venous leg ulcer on her leg. Treatments over six months with different treatments, including povidone-iodine, silver dressings, and compression therapy, were ineffective and subsequently switched to L-Mesitran Foam. The dressing choice was based on the wound type and complied with the instructions for use. Wound healing progressed nicely on different aspects and led to complete healing on day 23. No side effects or pain was experienced during treatment. The presented case supports the safety and efficacy of L-Mesitran Foam and serves as a proof of concept.
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13
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Chen V, Burgess JL, Verpile R, Tomic-Canic M, Pastar I. Novel Diagnostic Technologies and Therapeutic Approaches Targeting Chronic Wound Biofilms and Microbiota. CURRENT DERMATOLOGY REPORTS 2022; 11:60-72. [PMID: 37007641 PMCID: PMC10065746 DOI: 10.1007/s13671-022-00354-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Purpose of Review To provide an up-to-date overview of recent developments in diagnostic methods and therapeutic approaches for chronic wound biofilms and pathogenic microbiota. Recent Findings Biofilm infections are one of the major contributors to impaired wound healing in chronic wounds, including diabetic foot ulcers, venous leg ulcers, pressure ulcers, and nonhealing surgical wounds. As an organized microenvironment commonly including multiple microbial species, biofilms develop and persist through methods that allow evasion from host immune response and antimicrobial treatments. Suppression and reduction of biofilm infection have been demonstrated to improve wound healing outcomes. However, chronic wound biofilms are a challenge to treat due to limited methods for accurate, accessible clinical identification and the biofilm's protective properties against therapeutic agents. Here we review recent approaches towards visual markers for less invasive, enhanced biofilm detection in the clinical setting. We outline progress in wound care treatments including investigation of their antibiofilm effects, such as with hydrosurgical and ultrasound debridement, negative pressure wound therapy with instillation, antimicrobial peptides, nanoparticles and nanocarriers, electroceutical dressings, and phage therapy. Summary Current evidence for biofilm-targeted treatments has been primarily conducted in preclinical studies, with limited clinical investigation for many therapies. Improved identification, monitoring, and treatment of biofilms require expansion of point-of-care visualization methods and increased evaluation of antibiofilm therapies in robust clinical trials.
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14
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Cayemitte P, Gerliani N, Raymond P, Aider M. Study of the Antibacterial Potency of Electroactivated Solutions of Calcium Lactate and Calcium Ascorbate on Bacillus cereus ATCC 14579 Vegetative Cells. ACS OMEGA 2022; 7:3579-3595. [PMID: 35128265 PMCID: PMC8811942 DOI: 10.1021/acsomega.1c06124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 01/13/2022] [Indexed: 06/14/2023]
Abstract
Bacillus cereus is a pathogenic bacterium, Gram-positive, aerobic, and facultative anaerobic that can produce spores and different toxins. It is involved in serious foodborne illnesses such as the diarrheal and emetic syndromes, depending on the ingested toxin. This work is aimed to study the potency of electroactivated solutions (EAS) of calcium lactate, calcium ascorbate, and their mixture as antibacterial agents against B. cereus ATCC 14579 vegetative cells. The solutions used were electroactivated under electric current intensities of 250, 500, and 750 mA for 30 min. The obtained EAS were tested in direct contact with B. cereus (107 CFU/mL) for different durations ranging from 5 s to 2 min. Moreover, standard lactic and ascorbic acids were tested as controls at equivalent titratable acidity as that of the corresponding electroactivated solutions. The obtained results showed that EAS exhibit high antibacterial efficacy against B. cereus vegetative cells. The EAS obtained after electroactivation of calcium lactate and calcium ascorbate were more efficient than those of their corresponding standard acids (lactic and ascorbic). The observed antibacterial effect of the EAS resulted in a reduction of 7 log CFU/mL after 5 s of direct contact in some specific cases. Scanning (SEM) and transmission (TEM) electron microscopic observations provided conclusive evidence of the antibacterial activity of the used EAS. These results outlined the highly antimicrobial potency of EAS against B. cereus vegetative cells and that they can be considered in an eventual strategy to ensure food safety, surface cleaning, as well as replacement of hazardous disinfecting chemicals.
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Affiliation(s)
- Pierre
Emerson Cayemitte
- Department
of Food Sciences, Université Laval, Quebec, Quebec G1V0A6, Canada
- Institute
of Nutrition and Functional Foods (INAF), Université Laval, Quebec, Quebec G1V0A6, Canada
| | - Natela Gerliani
- Institute
of Nutrition and Functional Foods (INAF), Université Laval, Quebec, Quebec G1V0A6, Canada
- Department
of Soil Sciences and Agri-Food Engineering, Université Laval, Quebec, Quebec G1V0A6, Canada
| | - Philippe Raymond
- Saint-Hyacinthe
Laboratory, Canadian Food Inspection Agency, 3400 Casavant Boulevard West, Saint-Hyacinthe, Quebec J2S 8E3, Canada
| | - Mohammed Aider
- Institute
of Nutrition and Functional Foods (INAF), Université Laval, Quebec, Quebec G1V0A6, Canada
- Department
of Soil Sciences and Agri-Food Engineering, Université Laval, Quebec, Quebec G1V0A6, Canada
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15
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Antibiofilm activity of glycolic acid and glyoxal and their diffusion–reaction interactions with biofilm components. Food Res Int 2022; 152:110921. [DOI: 10.1016/j.foodres.2021.110921] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 11/08/2021] [Accepted: 12/20/2021] [Indexed: 01/06/2023]
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16
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You R, Kwon OY, Woo HJ, Lee SH. Hovenia Monofloral Honey can Attenuate Enterococcus faecalis Mediated Biofilm Formation and Inflammation. Food Sci Anim Resour 2022; 42:84-97. [PMID: 35028576 PMCID: PMC8728505 DOI: 10.5851/kosfa.2021.e65] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 11/16/2021] [Accepted: 11/16/2021] [Indexed: 11/06/2022] Open
Abstract
We evaluated the anti-biofilm formation and anti-inflammatory activity of Hovenia
monofloral honey (HMH) against Enterococcus faecalis.
Co-culture of HMH with E. faecalis attenuated the biofilm
formation of E. faecalis on a polystyrene surface. In addition,
HMH effectively eradicated the established E. faecalis biofilm.
HMH significantly attenuated E. faecalis growth but did not
affect the production of extracellular polymeric substances on E.
faecalis, indicating that reduction of E. faecalis
biofilm is a result of HMH-mediated killing of E. faecalis.
Furthermore, we found that HMH can effectively attenuate E.
faecalis-induced expression of a proinflammatory interleukin-8
(IL-8) in HT-29 cells. Interestingly, treatment of HMH significantly attenuated
the E. faecalis-mediated expression of Toll-like receptor-2
(TLR-2) and its adaptor molecules, myeloid differentiation primary response 88
(MyD88), in HT-29 cells. In addition, E. faecalis-induced
mitogen-activated protein kinases (MAPKs) phosphorylation was significantly
attenuated by HMH administration. Furthermore, HMH-mediated anti-inflammatory
efficacy (0.2 mg/mL of HMHs) had an equal extent of inhibitory efficacy as 5
μM of MyD88 inhibitor to attenuate E. faecalis-mediated
IL-8 expression in HT-29 cells. These results suggest that HMH could effectively
inhibit E. faecalis-mediated gastrointestinal inflammation
through regulating the TLR-2/MyD88/MAPKs signaling pathways. Collectively, our
data suggest that HMH could be developed as a potential natural agent to control
E. faecalis-mediated biofilm formation and
inflammation.
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Affiliation(s)
- Ri You
- Department of Nano-Bioengineering, Incheon National University, Incheon 22012, Korea
| | - Oh Yun Kwon
- Department of Nano-Bioengineering, Incheon National University, Incheon 22012, Korea
| | - Hyun Joo Woo
- Department of Nano-Bioengineering, Incheon National University, Incheon 22012, Korea
| | - Seung Ho Lee
- Department of Nano-Bioengineering, Incheon National University, Incheon 22012, Korea
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17
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Honey antibacterial activity: A neglected aspect of honey quality assurance as functional food. Trends Food Sci Technol 2021. [DOI: 10.1016/j.tifs.2021.11.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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18
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Fratianni F, Ombra MN, d’Acierno A, Caputo L, Amato G, De Feo V, Coppola R, Nazzaro F. Polyphenols Content and In Vitro α-Glycosidase Activity of Different Italian Monofloral Honeys, and Their Effect on Selected Pathogenic and Probiotic Bacteria. Microorganisms 2021; 9:1694. [PMID: 34442773 PMCID: PMC8398212 DOI: 10.3390/microorganisms9081694] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 08/05/2021] [Accepted: 08/07/2021] [Indexed: 11/16/2022] Open
Abstract
We evaluated the polyphenol content and the α-glucosidase activity exhibited by different monofloral honeys of Italian origin. Their capacity to act on different pathogenic (Acinetobacter baumannii, Escherichia coli, Listeria monocytogenes, Pseudomonas aeruginosa, and Staphylococcus aureus) as well as probiotic bacteria (Lacticaseibacillus casei, Lactobacillus acidophilus, Lactiplantibacillus plantarum, Lactobacillus gasseri, and Lacticaseibacillus rhamnosus) was also assessed. Total polyphenols varied between 110.46 μg/g of fresh product (rhododendron honey) and 552.29 μg/g of fresh product (strawberry tree honey). Such result did not correspond to a parallel inhibitory α-glycosidase activity that, in each case was never higher than 33 μg/mL. Honeys were differently capable to fight the biofilm formation of the pathogens (inhibition up to 93.27%); they inhibited the in vitro adhesive process (inhibition up to 84.27%), and acted on mature biofilm (with values up to 76.64%). Their effect on bacterial metabolism was different too. Honeys were ineffective to inhibit E. coli mature biofilm nor to act on its metabolism. The action of the honey on probiotic strains seemed almost always stimulate their growth. Thus, these monofloral honeys might exhibit effects on human health and act positively as prebiotics.
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Affiliation(s)
- Florinda Fratianni
- Institute of Food Science, CNR-ISA, Via Roma 64, 83100 Avellino, Italy; (F.F.); (M.N.O.); (A.d.)
| | - Maria Neve Ombra
- Institute of Food Science, CNR-ISA, Via Roma 64, 83100 Avellino, Italy; (F.F.); (M.N.O.); (A.d.)
| | - Antonio d’Acierno
- Institute of Food Science, CNR-ISA, Via Roma 64, 83100 Avellino, Italy; (F.F.); (M.N.O.); (A.d.)
| | - Lucia Caputo
- Department of Pharmacy, University of Salerno, via Giovanni Paolo II, 84084 Fisciano, Italy; (L.C.); (G.A.)
| | - Giuseppe Amato
- Department of Pharmacy, University of Salerno, via Giovanni Paolo II, 84084 Fisciano, Italy; (L.C.); (G.A.)
| | - Vincenzo De Feo
- Department of Pharmacy, University of Salerno, via Giovanni Paolo II, 84084 Fisciano, Italy; (L.C.); (G.A.)
| | - Raffaele Coppola
- Department of Agricultural, Environmental and Food Sciences, University of Molise, Via de Sanctis snc, 86100 Campobasso, Italy;
| | - Filomena Nazzaro
- Institute of Food Science, CNR-ISA, Via Roma 64, 83100 Avellino, Italy; (F.F.); (M.N.O.); (A.d.)
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19
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Holubová A, Chlupáčová L, Cetlová L, Cremers NAJ, Pokorná A. Medical-Grade Honey as an Alternative Treatment for Antibiotics in Non-Healing Wounds-A Prospective Case Series. Antibiotics (Basel) 2021; 10:antibiotics10080918. [PMID: 34438968 PMCID: PMC8388796 DOI: 10.3390/antibiotics10080918] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 07/21/2021] [Accepted: 07/25/2021] [Indexed: 02/06/2023] Open
Abstract
Non-healing wounds are usually colonised by various types of bacteria. An alternative to antibiotic treatment in patients with infected wounds with local signs of inflammation may be medical-grade honey (MGH), which favourably affects the healing process with its antimicrobial, antioxidant, anti-inflammatory, and immunomodulatory properties. The objective of this study was to evaluate the effect of MGH therapy on the healing process of non-healing wounds of various aetiologies and different wound colonisations. Prospective, observation–intervention case studies (n = 9) of patients with wounds of various aetiologies (venous leg ulcers, diabetic foot ulcers, surgical wound dehiscence) are presented. All wounds were treated with MGH and the healing trajectory was rigorously and objectively monitored. In all cases, pain, odour, and exudation were quickly resolved, which led to an improvement in the quality of life of patients. Despite the proven bacterial microflora in wounds, antibiotic treatment was not necessary. The effects of MGH alleviated the signs of local infection until their complete elimination. In eight out of nine cases, the non-healing wound was completely healed. MGH has antimicrobial, anti-inflammatory, and antioxidant effects in wounds of various aetiologies and forms an effective alternative for the use of antibiotics for treating locally infected wounds.
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Affiliation(s)
- Adéla Holubová
- Faculty of Health and Social Sciences, University of Bohemia, 370 11 České Budějovice, Czech Republic
- DiaPodi Care spol. s r.o., 392 01 Soběslav, Czech Republic;
- Correspondence: ; Tel.: +420-774-672-220
| | | | - Lada Cetlová
- Department of Health Sciences, College of Polytechnics Jihlava, 586 01 Jihlava, Czech Republic; (L.C.); (A.P.)
| | | | - Andrea Pokorná
- Department of Health Sciences, College of Polytechnics Jihlava, 586 01 Jihlava, Czech Republic; (L.C.); (A.P.)
- Department of Nursing and Midwifery, Faculty of Medicine, Masaryk University, 625 00 Brno, Czech Republic
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20
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Bai M, Liu H, Wang S, Shu Q, Xu K, Zhou J, Xiong X, Huang R, Deng J, Yin Y, Liu Z. Dietary Moutan Cortex Radicis Improves Serum Antioxidant Capacity and Intestinal Immunity and Alters Colonic Microbiota in Weaned Piglets. Front Nutr 2021; 8:679129. [PMID: 34222303 PMCID: PMC8247480 DOI: 10.3389/fnut.2021.679129] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 04/30/2021] [Indexed: 12/12/2022] Open
Abstract
Background:Moutan cortex radicis (MCR), as a common traditional Chinese medicine, has been widely used as an antipyretic, antiseptic, and anti-inflammatory agent in China. Objectives: This study aimed to investigate the effects of dietary MCR supplementation on the antioxidant capacity and intestinal health of the pigs and to explore whether MCR exerts positive effects on intestinal health via regulating nuclear factor kappa-B (NF-κB) signaling pathway and intestinal microbiota. Methods: MCR powder was identified by LC-MS analysis. Selected 32 weaned piglets (21 d of age, 6.37 ± 0.10 kg average BW) were assigned (8 pens/diet, 1 pig/pen) to 4 groups and fed with a corn-soybean basal diet supplemented with 0, 2,000, 4,000, and 8,000 mg/kg MCR for 21 d. After the piglets were sacrificed, antioxidant indices, histomorphology examination, and inflammatory signaling pathway expression were assessed. The 16s RNA sequencing was used to analyze the effects of MCR on the intestinal microbiota structure of piglets. Results: Supplemental 4,000 mg/kg MCR significantly increased (P < 0.05) the average daily weight gain (ADG), average daily feed intake (ADFI), total antioxidative capability, colonic short-chain fatty acids (SCFA) concentrations, and the crypt depth in the jejunum but decreased (P < 0.05) the mRNA expression levels of interferon γ, tumor necrosis factor-α, interleukin-1β, inhibiting kappa-B kinase β (IKKβ), inhibiting nuclear factor kappa-B (IκBα), and NF-κB in the jejunum and ileum. Microbiota sequencing identified that MCR supplementation significantly increased the microbial richness indices (Chao1, ACE, and observed species, P < 0.05) and the relative abundances of Firmicutes and Lactobacillus (P < 0.05), decreased the relative abundances of Bacteroides, Parabacteroides, unidentified_Lachnospiraceae, and Enterococcus (P < 0.05) and had no significant effects on the diversity indices (Shannon and Simpson, P > 0.05). Microbial metabolic phenotypes analysis also showed that the richness of aerobic bacteria and facultative anaerobic bacteria, oxidative stress tolerance, and biofilm forming were significantly increased (P < 0.05), and the richness of anaerobic bacteria and pathogenic potential of gut microbiota were reduced (P < 0.05) by MCR treatment. Regression analysis showed that the optimal MCR supplemental level for growth performance, serum antioxidant capacity, and intestinal health of weaned piglets was 3,420 ~ 4,237 mg/kg. Conclusions: MCR supplementation improved growth performance and serum antioxidant capacity, and alleviated intestinal inflammation by inhibiting the IKKβ/IκBα/NF-κB signaling pathway and affecting intestinal microbiota in weaned piglets.
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Affiliation(s)
- Miaomiao Bai
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production; Key Laboratory of Agro-ecological Processes in Subtropical Region; Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production; Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central, Ministry of Agriculture, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China.,College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Hongnan Liu
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production; Key Laboratory of Agro-ecological Processes in Subtropical Region; Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production; Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central, Ministry of Agriculture, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
| | - Shanshan Wang
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production; Key Laboratory of Agro-ecological Processes in Subtropical Region; Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production; Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central, Ministry of Agriculture, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
| | - Qingyan Shu
- Key Laboratory of Plant Resources/Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing, China
| | - Kang Xu
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production; Key Laboratory of Agro-ecological Processes in Subtropical Region; Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production; Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central, Ministry of Agriculture, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
| | - Jian Zhou
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production; Key Laboratory of Agro-ecological Processes in Subtropical Region; Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production; Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central, Ministry of Agriculture, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
| | - Xia Xiong
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production; Key Laboratory of Agro-ecological Processes in Subtropical Region; Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production; Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central, Ministry of Agriculture, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
| | - Ruilin Huang
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production; Key Laboratory of Agro-ecological Processes in Subtropical Region; Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production; Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central, Ministry of Agriculture, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
| | - Jinping Deng
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Yulong Yin
- Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process; National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production; Key Laboratory of Agro-ecological Processes in Subtropical Region; Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production; Scientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-Central, Ministry of Agriculture, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China.,College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Zheng'an Liu
- Key Laboratory of Plant Resources/Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing, China
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21
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Hall TJ, Villapún VM, Addison O, Webber MA, Lowther M, Louth SET, Mountcastle SE, Brunet MY, Cox SC. A call for action to the biomaterial community to tackle antimicrobial resistance. Biomater Sci 2021; 8:4951-4974. [PMID: 32820747 DOI: 10.1039/d0bm01160f] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The global surge of antimicrobial resistance (AMR) is a major concern for public health and proving to be a key challenge in modern disease treatment, requiring action plans at all levels. Microorganisms regularly and rapidly acquire resistance to antibiotic treatments and new drugs are continuously required. However, the inherent cost and risk to develop such molecules has resulted in a drying of the pipeline with very few compounds currently in development. Over the last two decades, efforts have been made to tackle the main sources of AMR. Nevertheless, these require the involvement of large governmental bodies, further increasing the complexity of the problem. As a group with a long innovation history, the biomaterials community is perfectly situated to push forward novel antimicrobial technologies to combat AMR. Although this involvement has been felt, it is necessary to ensure that the field offers a united front with special focus in areas that will facilitate the development and implementation of such systems. This paper reviews state of the art biomaterials strategies striving to limit AMR. Promising broad-spectrum antimicrobials and device modifications are showcased through two case studies for different applications, namely topical and implantables, demonstrating the potential for a highly efficacious physical and chemical approach. Finally, a critical review on barriers and limitations of these methods has been developed to provide a list of short and long-term focus areas in order to ensure the full potential of the biomaterials community is directed to helping tackle the AMR pandemic.
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Affiliation(s)
- Thomas J Hall
- School of Chemical Engineering, University of Birmingham, Edgbaston B15 2TT, UK.
| | - Victor M Villapún
- School of Chemical Engineering, University of Birmingham, Edgbaston B15 2TT, UK.
| | - Owen Addison
- Faculty of Dentistry, Oral and Craniofacial Sciences, King's College London, London, SE1 9RT, UK
| | - Mark A Webber
- Quadram Institute Bioscience, Norwich Research Park, Colney, NR4 7UQ, UK
| | - Morgan Lowther
- School of Chemical Engineering, University of Birmingham, Edgbaston B15 2TT, UK.
| | - Sophie E T Louth
- School of Chemical Engineering, University of Birmingham, Edgbaston B15 2TT, UK.
| | - Sophie E Mountcastle
- School of Chemical Engineering, University of Birmingham, Edgbaston B15 2TT, UK.
| | - Mathieu Y Brunet
- School of Chemical Engineering, University of Birmingham, Edgbaston B15 2TT, UK.
| | - Sophie C Cox
- School of Chemical Engineering, University of Birmingham, Edgbaston B15 2TT, UK.
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22
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Brudzynski K. Honey as an Ecological Reservoir of Antibacterial Compounds Produced by Antagonistic Microbial Interactions in Plant Nectars, Honey and Honey Bee. Antibiotics (Basel) 2021; 10:551. [PMID: 34065141 PMCID: PMC8151657 DOI: 10.3390/antibiotics10050551] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 05/07/2021] [Accepted: 05/07/2021] [Indexed: 04/08/2023] Open
Abstract
The fundamental feature of "active honeys" is the presence and concentration of antibacterial compounds. Currently identified compounds and factors have been described in several review papers without broader interpretation or links to the processes for their formation. In this review, we indicate that the dynamic, antagonistic/competitive microbe-microbe and microbe-host interactions are the main source of antibacterial compounds in honey. The microbial colonization of nectar, bees and honey is at the center of these interactions that in consequence produce a range of defence molecules in each of these niches. The products of the microbial interference and exploitive competitions include antimicrobial peptides, antibiotics, surfactants, inhibitors of biofilm formation and quorum sensing. Their accumulation in honey by horizontal transfer might explain honey broad-spectrum, pleiotropic, antibacterial activity. We conclude that honey is an ecological reservoir of antibacterial compounds produced by antagonistic microbial interactions in plant nectars, honey and honey bee. Thus, refocusing research on secondary metabolites resulting from these microbial interactions might lead to discovery of new antibacterial compounds in honey that are target-specific, i.e., acting on specific cellular components or inhibiting the essential cellular function.
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Affiliation(s)
- Katrina Brudzynski
- Department of Drug Discovery, Bee-Biomedicals Inc., St. Catharines, ON L2T 3T4, Canada;
- Formerly Department of Biological Sciences, Brock University, St. Catharines, ON L2T 3T4, Canada
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Maillard JY, Kampf G, Cooper R. Antimicrobial stewardship of antiseptics that are pertinent to wounds: the need for a united approach. JAC Antimicrob Resist 2021; 3:dlab027. [PMID: 34223101 PMCID: PMC8209993 DOI: 10.1093/jacamr/dlab027] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Long before the nature of infection was recognized, or the significance of biofilms in delayed healing was understood, antimicrobial agents were being used in wound care. In the last 70 years, antibiotics have provided an effective means to control wound infection, but the continued emergence of antibiotic-resistant strains and the documented antibiotic tolerance of biofilms has reduced their effectiveness. A range of wound dressings containing an antimicrobial (antibiotic or non-antibiotic compound) has been developed. Whereas standardized methods for determining the efficacy of non-antibiotic antimicrobials in bacterial suspension tests were developed in the early twentieth century, standardized ways of evaluating the efficacy of antimicrobial dressings against microbial suspensions and biofilms are not available. Resistance to non-antibiotic antimicrobials and cross-resistance with antibiotics has been reported, but consensus on breakpoints is absent and surveillance is impossible. Antimicrobial stewardship is therefore in jeopardy. This review highlights these difficulties and in particular the efficacy of current non-antibiotic antimicrobials used in dressings, their efficacy, and the challenges of translating in vitro efficacy data to the efficacy of dressings in patients. This review calls for a unified approach to developing standardized methods of evaluating antimicrobial dressings that will provide an improved basis for practitioners to make informed choices in wound care.
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Affiliation(s)
- Jean-Yves Maillard
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff, Wales, UK
| | - Günter Kampf
- Institute of Hygiene and Environmental Medicine, University of Greifswald, Germany
| | - Rose Cooper
- School of Sport & Health Sciences, Cardiff Metropolitan University, Cardiff, Wales, UK
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Tai J, Lee K, Kim TH. Current Perspective on Nasal Delivery Systems for Chronic Rhinosinusitis. Pharmaceutics 2021; 13:246. [PMID: 33578812 PMCID: PMC7916625 DOI: 10.3390/pharmaceutics13020246] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 02/02/2021] [Accepted: 02/06/2021] [Indexed: 12/12/2022] Open
Abstract
Chronic rhinosinusitis is an upper respiratory disease during which topical drug treatment via the nasal cavity is the most actively utilized therapeutic strategy. In addition to steroids, antibiotics, and antifungal agents, which are widely used in clinical practice, research on novel topical agents to improve the bacterial biofilm or mucociliary clearance remains ongoing. Moreover, owing to the complex structure of the nasal cavity, the effects of nasal drug delivery vary depending on factors related to delivery fluid dynamics, including device, volume, and compounds. In this article, we review methods and compounds that have been applied to chronic rhinosinusitis management and introduce recent advances and future perspectives in nasal drug delivery for upper respiratory diseases.
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Affiliation(s)
| | | | - Tae Hoon Kim
- Department of Otorhinolaryngology-Head & Neck Surgery, College of Medicine, Korea University, Seoul 02841, Korea; (J.T.); (K.L.)
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How to Evaluate Non-Growing Cells-Current Strategies for Determining Antimicrobial Resistance of VBNC Bacteria. Antibiotics (Basel) 2021; 10:antibiotics10020115. [PMID: 33530321 PMCID: PMC7912045 DOI: 10.3390/antibiotics10020115] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/19/2021] [Accepted: 01/22/2021] [Indexed: 12/17/2022] Open
Abstract
Thanks to the achievements in sanitation, hygiene practices, and antibiotics, we have considerably improved in our ongoing battle against pathogenic bacteria. However, with our increasing knowledge about the complex bacterial lifestyles and cycles and their plethora of defense mechanisms, it is clear that the fight is far from over. One of these resistance mechanisms that has received increasing attention is the ability to enter a dormancy state termed viable but non-culturable (VBNC). Bacteria that enter the VBNC state, either through unfavorable environmental conditions or through potentially lethal stress, lose their ability to grow on standard enrichment media, but show a drastically increased tolerance against antimicrobials including antibiotics. The inability to utilize traditional culture-based methods represents a considerable experimental hurdle to investigate their increased antimicrobial resistance and impedes the development and evaluation of effective treatments or interventions against bacteria in the VBNC state. Although experimental approaches were developed to detect and quantify VBNCs, only a few have been utilized for antimicrobial resistance screening and this review aims to provide an overview of possible methodological approaches.
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Mosteiro-Miguéns DG, Herrera-Jiménez C, Lorenzo-Ruiz H, Domínguez-Martís EM, Novío S. Successful Treatment of a Venous Leg Ulcer With Manuka Honey: A Case Study. J Wound Ostomy Continence Nurs 2021; 48:79-82. [PMID: 33427815 DOI: 10.1097/won.0000000000000712] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Refractory venous leg ulcers (VLUs) often require extended time to heal, and they carry a high risk of recurrence. This case study describes our experiences with a patient with a VLU refractory to multiple treatment strategies who was successfully treated with Manuka honey. CASE Mr S. was a 76-year-old man with multiple comorbid conditions and hypersensitivity to silver-based compounds, who developed 3 VLUs of his right lower extremity. He experienced 90 days of unsuccessful treatments using an iodized cadexomer ointment, hydrodetersive fiber dressings, hydrocolloid meshes, compression therapy, and antibiotic treatment without progression toward wound healing. We then initiated treatment with Manuka honey and continued compression therapy. His primary VLU was completely epithelialized within 38 days, and an adjacent VLU also showed progression toward healing. Mr S. reported clinically relevant improvement in wound-related pain at 17 days. CONCLUSION The use of Manuka honey proved effective in this patient with a VLU refractory to other treatment strategies.
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Affiliation(s)
- Diego Gabriel Mosteiro-Miguéns
- Diego Gabriel Mosteiro-Miguéns, Badalona Serveis Assistencials (BSA), Health Care Centre of Morera-Pomar, Badalona, Barcelona, Spain
- Cristina Herrera-Jiménez, Badalona Serveis Assistencials (BSA), Health Care Centre of Morera-Pomar, Badalona, Barcelona, Spain
- Héctor Lorenzo-Ruiz, Badalona Serveis Assistencials (BSA), Health Care Centre of Morera-Pomar, Badalona, Barcelona, Spain
- Eva María Domínguez-Martís, Master in Health Care, Management and Care, Galician Public Health Care Service, Health Care Centre of Concepción Arenal, Santiago de Compostela, A Coruña, Spain
- Silvia Novío, Doctor of Dental Medicine, Department of Psychiatry, Radiology, Public Health, Nursing and Medicine, Faculty of Nursing, University of Santiago de Compostela, Santiago de Compostela, A Coruña, Spain
| | - Cristina Herrera-Jiménez
- Diego Gabriel Mosteiro-Miguéns, Badalona Serveis Assistencials (BSA), Health Care Centre of Morera-Pomar, Badalona, Barcelona, Spain
- Cristina Herrera-Jiménez, Badalona Serveis Assistencials (BSA), Health Care Centre of Morera-Pomar, Badalona, Barcelona, Spain
- Héctor Lorenzo-Ruiz, Badalona Serveis Assistencials (BSA), Health Care Centre of Morera-Pomar, Badalona, Barcelona, Spain
- Eva María Domínguez-Martís, Master in Health Care, Management and Care, Galician Public Health Care Service, Health Care Centre of Concepción Arenal, Santiago de Compostela, A Coruña, Spain
- Silvia Novío, Doctor of Dental Medicine, Department of Psychiatry, Radiology, Public Health, Nursing and Medicine, Faculty of Nursing, University of Santiago de Compostela, Santiago de Compostela, A Coruña, Spain
| | - Héctor Lorenzo-Ruiz
- Diego Gabriel Mosteiro-Miguéns, Badalona Serveis Assistencials (BSA), Health Care Centre of Morera-Pomar, Badalona, Barcelona, Spain
- Cristina Herrera-Jiménez, Badalona Serveis Assistencials (BSA), Health Care Centre of Morera-Pomar, Badalona, Barcelona, Spain
- Héctor Lorenzo-Ruiz, Badalona Serveis Assistencials (BSA), Health Care Centre of Morera-Pomar, Badalona, Barcelona, Spain
- Eva María Domínguez-Martís, Master in Health Care, Management and Care, Galician Public Health Care Service, Health Care Centre of Concepción Arenal, Santiago de Compostela, A Coruña, Spain
- Silvia Novío, Doctor of Dental Medicine, Department of Psychiatry, Radiology, Public Health, Nursing and Medicine, Faculty of Nursing, University of Santiago de Compostela, Santiago de Compostela, A Coruña, Spain
| | - Eva María Domínguez-Martís
- Diego Gabriel Mosteiro-Miguéns, Badalona Serveis Assistencials (BSA), Health Care Centre of Morera-Pomar, Badalona, Barcelona, Spain
- Cristina Herrera-Jiménez, Badalona Serveis Assistencials (BSA), Health Care Centre of Morera-Pomar, Badalona, Barcelona, Spain
- Héctor Lorenzo-Ruiz, Badalona Serveis Assistencials (BSA), Health Care Centre of Morera-Pomar, Badalona, Barcelona, Spain
- Eva María Domínguez-Martís, Master in Health Care, Management and Care, Galician Public Health Care Service, Health Care Centre of Concepción Arenal, Santiago de Compostela, A Coruña, Spain
- Silvia Novío, Doctor of Dental Medicine, Department of Psychiatry, Radiology, Public Health, Nursing and Medicine, Faculty of Nursing, University of Santiago de Compostela, Santiago de Compostela, A Coruña, Spain
| | - Silvia Novío
- Diego Gabriel Mosteiro-Miguéns, Badalona Serveis Assistencials (BSA), Health Care Centre of Morera-Pomar, Badalona, Barcelona, Spain
- Cristina Herrera-Jiménez, Badalona Serveis Assistencials (BSA), Health Care Centre of Morera-Pomar, Badalona, Barcelona, Spain
- Héctor Lorenzo-Ruiz, Badalona Serveis Assistencials (BSA), Health Care Centre of Morera-Pomar, Badalona, Barcelona, Spain
- Eva María Domínguez-Martís, Master in Health Care, Management and Care, Galician Public Health Care Service, Health Care Centre of Concepción Arenal, Santiago de Compostela, A Coruña, Spain
- Silvia Novío, Doctor of Dental Medicine, Department of Psychiatry, Radiology, Public Health, Nursing and Medicine, Faculty of Nursing, University of Santiago de Compostela, Santiago de Compostela, A Coruña, Spain
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Shirlaw O, Billah Z, Attar B, Hughes L, Qasaymeh RM, Seidel V, Efthimiou G. Antibiofilm Activity of Heather and Manuka Honeys and Antivirulence Potential of Some of Their Constituents on the DsbA1 Enzyme of Pseudomonas aeruginosa. Antibiotics (Basel) 2020; 9:antibiotics9120911. [PMID: 33334017 PMCID: PMC7765399 DOI: 10.3390/antibiotics9120911] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 12/01/2020] [Accepted: 12/10/2020] [Indexed: 12/15/2022] Open
Abstract
Heather honey was tested for its effect on the formation of biofilms by Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, Klebsiella pneumoniae, Enterococcus faecalis, Salmonella Enteriditis and Acinetobacter baumanii in comparison with Manuka honey. At 0.25 mg/mL, Heather honey inhibited biofilm formation in S. aureus, A. baumanii, E. coli, S. Enteriditis and P. aeruginosa, but promoted the growth of E. faecalis and K. pneumoniae biofilms. Manuka honey inhibited biofilm formation in K. pneumoniae, E. faecalis, and S. Enteriditis, A. baumanii, E. coli and P. aeruginosa, but promoted S. aureus biofilm formation. Molecular docking with Autodock Vina was performed to calculate the predictive binding affinities and ligand efficiencies of Manuka and Heather honey constituents for PaDsbA1, the main enzyme controlling the correct folding of virulence proteins in Pseudomonas aeruginosa. A number of constituents, including benzoic acid and methylglyoxal, present in Heather and/or Manuka honey, revealed high ligand efficiencies for the target enzyme. This helps support, to some extent, the decrease in P. aeruginosa biofilm formation observed for such honeys.
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Affiliation(s)
- Oscar Shirlaw
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK; (O.S.); (Z.B.); (B.A.); (L.H.); (R.M.Q.)
| | - Zara Billah
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK; (O.S.); (Z.B.); (B.A.); (L.H.); (R.M.Q.)
| | - Baraa Attar
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK; (O.S.); (Z.B.); (B.A.); (L.H.); (R.M.Q.)
| | - Lisa Hughes
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK; (O.S.); (Z.B.); (B.A.); (L.H.); (R.M.Q.)
| | - Rana M. Qasaymeh
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK; (O.S.); (Z.B.); (B.A.); (L.H.); (R.M.Q.)
| | - Veronique Seidel
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK; (O.S.); (Z.B.); (B.A.); (L.H.); (R.M.Q.)
- Correspondence: (V.S.); (G.E.)
| | - Georgios Efthimiou
- Department of Biomedical and Forensic Sciences, Hardy Building, University of Hull, Hull HU6 7RX, UK
- Correspondence: (V.S.); (G.E.)
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Synergistic Antimicrobial Activity of Supplemented Medical-Grade Honey against Pseudomonas aeruginosa Biofilm Formation and Eradication. Antibiotics (Basel) 2020; 9:antibiotics9120866. [PMID: 33291554 PMCID: PMC7761815 DOI: 10.3390/antibiotics9120866] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 12/01/2020] [Accepted: 12/02/2020] [Indexed: 02/07/2023] Open
Abstract
Biofilms hinder wound healing. Medical-grade honey (MGH) is a promising therapy because of its broad-spectrum antimicrobial activity and the lack of risk for resistance. This study investigated the inhibitory and eradicative activity against multidrug-resistant Pseudomonas aeruginosa biofilms by different established MGH-based wound care formulations. Six different natural wound care products (Medihoney, Revamil, Mebo, Melladerm, L-Mesitran Ointment, and L-Mesitran Soft) were tested in vitro. Most of them contain MGH only, whereas some were supplemented. L-Mesitran Soft demonstrated the most potent antimicrobial activity (6.08-log inhibition and 3.18-log eradication). Other formulations ranged between 0.89-log and 4.80-log inhibition and 0.65-log and 1.66-log eradication. Therefore, the contribution of different ingredients of L-Mesitran Soft was investigated in more detail. The activity of the same batch of raw MGH (1.38-log inhibition and 2.35-log eradication), vitamins C and E (0.95-log inhibition and 0.94-log eradication), and all ingredients except MGH (1.69-log inhibition and 0.75-log eradication) clearly support a synergistic activity of components within the L-Mesitran Soft formulation. Several presented clinical cases illustrate its clinical antimicrobial efficacy against Pseudomonas aeruginosa biofilms. In conclusion, MGH is a potent treatment for Pseudomonas biofilms. L-Mesitran Soft has the strongest antimicrobial activity, which is likely due to the synergistic activity mediated by its supplements.
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Qu Y, McGiffin D, Kure C, McLean J, Duncan C, Peleg AY. In vitro Evaluation of Medihoney Antibacterial Wound Gel as an Anti-biofilm Agent Against Ventricular Assist Device Driveline Infections. Front Microbiol 2020; 11:605608. [PMID: 33329497 PMCID: PMC7719625 DOI: 10.3389/fmicb.2020.605608] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Accepted: 10/30/2020] [Indexed: 12/17/2022] Open
Abstract
Objectives: In adult ventricular assist device (VAD) programs in Australian hospitals, Medihoney Antibacterial Wound Gel (MAWG) is routinely used at the skin exit-site of VAD drivelines to prevent infections; however, its effectiveness remains unclear. Our aim was to assess antimicrobial activity of Medihoney wound gel, using in vitro models that mimic clinical biofilms grown at the driveline exit-site. Methods: Antimicrobial susceptibility testing of MAWG was performed for 24 clinical isolates grown under planktonic conditions, and four representative strains grown as biofilms. Different antimicrobial mechanisms of MAWG were assessed respectively for their relative contribution to its anti-biofilm activity. A colony biofilm assay and a drip-flow biofilm reactor assay mimicking the driveline exit-site environment were used to evaluate the activity of MAWG against biofilm growth at the driveline exit-site. Results: MAWG demonstrated species-specific activity against planktonic cultures [minimum inhibitory concentrations (MICs), 5-20% weight/volume (W/V) for Staphylococcus species, 20->40% (W/V) for Pseudomonas aeruginosa and Candida species]. Higher concentrations [MICs, 30->80% (W/V)] were able to inhibit biofilm growth, but failed to eradicate pre-established biofilms. The anti-biofilm properties of MAWG were multi-faceted, with the often-advertised "active" ingredient methylglyoxal (MGO) playing a less important role. The colony biofilm assay and the drip-flow biofilm reactor assay suggested that MAWG was unable to kill biofilms pre-established in a driveline exit-site environment, or effectively prevent planktonic cells from forming adherent monolayers and further developing mature biofilms. Conclusion: Our work suggests a suboptimal effectiveness of MAWG in preventing driveline infections due to biofilm development.
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Affiliation(s)
- Yue Qu
- Infection and Immunity Theme, Monash Biomedicine Discovery Institute, Department of Microbiology, Monash University, Clayton, VIC, Australia.,Department of Infectious Diseases, The Alfred Hospital and Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - David McGiffin
- Department of Cardiothoracic Surgery, The Alfred Hospital and Monash University, Melbourne, VIC, Australia.,Department of Medicine, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Christina Kure
- Department of Cardiothoracic Surgery, The Alfred Hospital and Monash University, Melbourne, VIC, Australia.,Department of Medicine, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Janelle McLean
- Transplant Services, The Alfred Hospital and Monash University, Melbourne, VIC, Australia
| | - Courtney Duncan
- Transplant Services, The Alfred Hospital and Monash University, Melbourne, VIC, Australia
| | - Anton Y Peleg
- Infection and Immunity Theme, Monash Biomedicine Discovery Institute, Department of Microbiology, Monash University, Clayton, VIC, Australia.,Department of Infectious Diseases, The Alfred Hospital and Central Clinical School, Monash University, Melbourne, VIC, Australia
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Biofilm Formation Reducing Properties of Manuka Honey and Propolis in Proteus mirabilis Rods Isolated from Chronic Wounds. Microorganisms 2020; 8:microorganisms8111823. [PMID: 33228072 PMCID: PMC7699395 DOI: 10.3390/microorganisms8111823] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 11/17/2020] [Indexed: 12/11/2022] Open
Abstract
Chronic wound infections are difficult to manage because of the biofilm formation in the wound environment. New measures for eliminating infections are necessary to increase the chance of wound healing. Apitherapy may be the new solution. The aim of this study was to assess the prevalence of wound infection factors and to examine the impact of Manuka honey and ethanol extract of propolis on biofilm formation of Proteus mirabilis isolated from chronic wound infections. According to the findings, the most frequent factors of infection are Staphylococcus aureus (46.1%), Pseudomonas aeruginosa (35.0%), and Proteus mirabilis (10.6%). Minimal inhibitory concentration and minimal bactericidal concentration values were assigned using the microbroth dilution test according to the Clinical and Laboratory Standards Institute. Biofilm of Proteus mirabilis isolates was formed in 96-well polystyrene plates and treated with Manuka honey (concentrations from 1.88% to 30.0%) and ethanol extract of propolis (1.0% to 40.0%). After 24 h, the biofilm viability was expressed by formazan absorbance (λ = 470 nm). Manuka honey reduced the biofilm viability in all, and ethanol extract of propolis in most, of the concentrations tested. Ethanol extract of propolis at the concentrations of 20.0% and 40.0%, reduced biofilm viability stronger than ethanol itself. With these results comes the conclusion that these substances can reduce biofilm formation.
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Nolan VC, Harrison J, Wright JEE, Cox JAG. Clinical Significance of Manuka and Medical-Grade Honey for Antibiotic-Resistant Infections: A Systematic Review. Antibiotics (Basel) 2020; 9:antibiotics9110766. [PMID: 33142845 PMCID: PMC7693943 DOI: 10.3390/antibiotics9110766] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 10/29/2020] [Accepted: 10/30/2020] [Indexed: 01/22/2023] Open
Abstract
Antimicrobial resistance is an ever-increasing global issue that has the potential to overtake cancer as the leading cause of death worldwide by 2050. With the passing of the "golden age" of antibiotic discovery, identifying alternative treatments to commonly used antimicrobials is more important than ever. Honey has been used as a topical wound treatment for millennia and more recently has been formulated into a series of medical-grade honeys for use primarily for wound and burn treatment. In this systematic review, we examined the effectiveness of differing honeys as an antimicrobial treatment against a variety of multidrug-resistant (MDR) bacterial species. We analysed 16 original research articles that included a total of 18 different types of honey against 32 different bacterial species, including numerous MDR strains. We identified that Surgihoney was the most effective honey, displaying minimum inhibitory concentrations as low as 0.1% (w/v); however, all honeys reviewed showed a high efficacy against most bacterial species analysed. Importantly, the MDR status of each bacterial strain had no impact on the susceptibility of the organism to honey. Hence, the use of honey as an antimicrobial therapy should be considered as an alternative approach for the treatment of antibiotic-resistant infections.
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Affiliation(s)
- Victoria C. Nolan
- College of Health and Life Sciences, Aston University, Aston Triangle, Birmingham B4 7ET, UK; (V.C.N.); (J.H.)
| | - James Harrison
- College of Health and Life Sciences, Aston University, Aston Triangle, Birmingham B4 7ET, UK; (V.C.N.); (J.H.)
| | - John E. E. Wright
- Department of Intensive Care Medicine, Great Western Hospital NHS Foundation Trust, Swindon SN3 6BB, UK;
| | - Jonathan A. G. Cox
- College of Health and Life Sciences, Aston University, Aston Triangle, Birmingham B4 7ET, UK; (V.C.N.); (J.H.)
- Correspondence: ; Tel.: +44-121-204-5011
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Manciula LG, Jeican II, Tudoran LB, Albu S. Biofilms and inflammation in patients with chronic rhinosinusitis. Med Pharm Rep 2020; 93:374-383. [PMID: 33225263 PMCID: PMC7664719 DOI: 10.15386/mpr-1691] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/15/2020] [Accepted: 07/03/2019] [Indexed: 11/23/2022] Open
Abstract
Introduction The aim of the present study is to evaluate the presence of biofilms in patients with chronic rhinosinusitis (CRS), with or without nasal polyps, and their relationship to eosinophils and plasma cells. We compared the results with those obtained in nonCRS patients. Methods A total of 50 patients were included in the study, 30 CRSwNP patients, 10 CRSsNP cases and 10 control patients who were operated for deviated septum. Biofilm detection was performed by means of H&E staining and SEM. Eosinophil and plasma cell values were recorded and compared between groups. Results Biofilms were identified in 30 patients (60%), 76.6% (23 out of 30) of the CRSwNP patients, 70% (7 out of 10) of the CRSsNP patients and none of the septoplasty patients. Eosinophil and plasma cell values were more elevated in CRS patients, being strongly correlated to biofilm presence and nasal polyposis. Conclusion Biofilm presence was demonstrated in many of the CRS patients, with no evidence in the control cases. Our study findings indicate that inflammatory cell counts are higher in patients with CRS compared to controls, but also more elevated in patients with polyposis. In biofilm-positive patients, eosinophil and plasma cell counts were greater than those in patients without biofilms, demonstrating the proinflammatory action of the biofilm in the sino-nasal pathology.
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Affiliation(s)
- Lavinia-Gianina Manciula
- 2 Department of Otolaryngology, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Ionut Isaia Jeican
- Department of Head and Neck Surgery and Otorhinolaryngology, University Clinical Hospital of Railway Company, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania. Department of Anatomy and Embryology, Iuliu Haţieganu University of Medicine and Pharmacy Cluj-Napoca
| | - Lucian Barbu Tudoran
- "Prof. C. Craciun" Electron Microscopy Laboratory, Faculty of Biology & Geology, Babes-Bolyai University; Electron Microscopy Integrated Laboratory, National Institute for R&D of Isotopic and Molecular Technologies, Cluj-Napoca, Romania
| | - Silviu Albu
- 2 Department of Otolaryngology, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
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Kafantaris I, Amoutzias GD, Mossialos D. Foodomics in bee product research: a systematic literature review. Eur Food Res Technol 2020. [DOI: 10.1007/s00217-020-03634-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Griffin AS, Cabot P, Wallwork B, Panizza B. Alternative therapies for chronic rhinosinusitis: A review. EAR, NOSE & THROAT JOURNAL 2020:145561320939415. [PMID: 33023328 DOI: 10.1177/0145561320939415] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The use of alternative medicine in chronic rhinosinus-itis (CRS) continues to increase in popularity, for the most part without meeting the burden of being based on sound clinical evidence. New and emerging treat-ments, both natural and developed, are numerous, and it remains a challenge for otolaryngologists as well as general practitioners to keep up to date with these therapies and their efficacy. In this systematic review, we discuss a number of alternative therapies for CRS, their proposed physiologic mechanisms, and evidence supporting their use. This analysis is based on our re-view of the English-language literature on alternative therapies for CRS (we did not include any therapies that are already recommended by accepted profession-al bodies). Data collection was performed using the PubMed database (not restricted to MEDLINE due to the nature of the subject matter), the Cochrane data-bases, and bibliography searches. We found that while many of the alternative therapies we reviewed might have a firm basis in science, they lack any clinical ev-idence to support their use specifically for CRS. Some emerging therapies, such as therapeutic ultrasonog-raphy and phonophoresis, show some promise, based on a growing body of positive evidence. In addition, the use of baby shampoo, thyme honey, and bromelain additives to saline lavage in CRS are all supported by clinical evidence, as is Sinupret, an oral preparation that contains echinacea. However, higher levels of ev-idence gleaned from large, well-designed, prospective, randomized, controlled trials are needed before any of these therapies can be recommended.
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Affiliation(s)
- Aaron S Griffin
- From the Pharmacy Australia Centre of Excellence, School of Pharmacy, University of Queensland, Woolloongabba, Queensland, Australia
- Department of Otolaryngology-Head and Neck Surgery, Princess Alexandra Hospital, Woolloongabba
| | - Peter Cabot
- From the Pharmacy Australia Centre of Excellence, School of Pharmacy, University of Queensland, Woolloongabba, Queensland, Australia
| | - Ben Wallwork
- From the Pharmacy Australia Centre of Excellence, School of Pharmacy, University of Queensland, Woolloongabba, Queensland, Australia
- Department of Otolaryngology-Head and Neck Surgery, Princess Alexandra Hospital, Woolloongabba
| | - Ben Panizza
- From the Pharmacy Australia Centre of Excellence, School of Pharmacy, University of Queensland, Woolloongabba, Queensland, Australia
- Department of Otolaryngology-Head and Neck Surgery, Princess Alexandra Hospital, Woolloongabba
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Antibacterial and Antivirulence Activity of Manuka Honey against Genetically Diverse Staphylococcus pseudintermedius Strains. Appl Environ Microbiol 2020; 86:AEM.01768-20. [PMID: 32801179 PMCID: PMC7531947 DOI: 10.1128/aem.01768-20] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 07/28/2020] [Indexed: 12/21/2022] Open
Abstract
Staphylococcus pseudintermedius is an important member of the skin microbial community in animals and can cause opportunistic infections in both pets and their owners. The high incidence of antimicrobial resistance in S. pseudintermedius highlights that this opportunistic zoonotic pathogen can cause infections which require prolonged and intensive treatment to resolve. Manuka honey has proven efficacy against many bacterial pathogens and is an accepted topical treatment for infections in both veterinary and clinical practice, and so it is a particularly appropriate antimicrobial for use with zoonotic pathogens such as S. pseudintermedius. Here, we demonstrate that not only is manuka honey highly potent against novel multidrug-resistant S. pseudintermedius isolates, it also acts synergistically with clinically relevant antibiotics. In addition, manuka honey modulates S. pseudintermedius virulence activity, even at subinhibitory concentrations. In a clinical setting, these attributes may assist in controlling infection, allowing a more rapid resolution and reducing antibiotic use. Staphylococcus pseudintermedius causes opportunistic infections in dogs. It also has significant zoonotic potential, with the emergence of multidrug resistance leading to difficulty treating both animal and human infections. Manuka honey has previously been reported to inhibit many bacterial pathogens, including methicillin-resistant Staphylococcus aureus, and is successfully utilized in both clinical and veterinary practice. Here, we evaluated the ability of manuka honey to inhibit strains of S. pseudintermedius grown alone and in combination with antibiotics, as well as its capacity to modulate virulence within multiple S. pseudintermedius isolates. All 18 of the genetically diverse S. pseudintermedius strains sequenced and tested were inhibited by ≤12% (wt/vol) medical-grade manuka honey, although tolerance to five clinically relevant antibiotics was observed. The susceptibility of the isolates to four of these antibiotics was significantly increased (P ≤ 0.05) when combined with sublethal concentrations of honey, although sensitivity to oxacillin was decreased. Virulence factor (DNase, protease, and hemolysin) activity was also significantly reduced (P ≤ 0.05) in over half of isolates when cultured with sublethal concentrations of honey (13, 9, and 10 isolates, respectively). These findings highlight the potential for manuka honey to be utilized against S. pseudintermedius infections. IMPORTANCEStaphylococcus pseudintermedius is an important member of the skin microbial community in animals and can cause opportunistic infections in both pets and their owners. The high incidence of antimicrobial resistance in S. pseudintermedius highlights that this opportunistic zoonotic pathogen can cause infections which require prolonged and intensive treatment to resolve. Manuka honey has proven efficacy against many bacterial pathogens and is an accepted topical treatment for infections in both veterinary and clinical practice, and so it is a particularly appropriate antimicrobial for use with zoonotic pathogens such as S. pseudintermedius. Here, we demonstrate that not only is manuka honey highly potent against novel multidrug-resistant S. pseudintermedius isolates, it also acts synergistically with clinically relevant antibiotics. In addition, manuka honey modulates S. pseudintermedius virulence activity, even at subinhibitory concentrations. In a clinical setting, these attributes may assist in controlling infection, allowing a more rapid resolution and reducing antibiotic use.
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Mokhtar JA, McBain AJ, Ledder RG, Binsuwaidan R, Rimmer V, Humphreys GJ. Exposure to a Manuka Honey Wound Gel Is Associated With Changes in Bacterial Virulence and Antimicrobial Susceptibility. Front Microbiol 2020; 11:2036. [PMID: 32973735 PMCID: PMC7466559 DOI: 10.3389/fmicb.2020.02036] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Accepted: 07/31/2020] [Indexed: 11/13/2022] Open
Abstract
The use of manuka honey for the topical treatment of wounds has increased worldwide owing to its broad spectrum of activity towards bacteria in both planktonic and biofilm growth modes. Despite this, the potential consequences of bacterial exposure to manuka honey, as may occur during the treatment of chronic wounds, are not fully understood. Here, we describe changes in antimicrobial susceptibility and virulence in a panel of bacteria, including wound isolates, following repeated exposure (ten passages) to sub-inhibitory concentrations of a manuka honey based wound gel. Changes in antibiotic sensitivity above 4-fold were predominantly related to increased vancomycin sensitivity in the staphylococci. Interestingly, Staphylococcus epidermidis displayed phenotypic resistance to erythromycin following passaging, with susceptibility profiles returning to baseline in the absence of further honey exposure. Changes in susceptibility to the tested wound gel were moderate (≤ 1-fold) when compared to the respective parent strain. In sessile communities, increased biofilm eradication concentrations over 4-fold occurred in a wound isolate of Pseudomonas aeruginosa (WIBG 2.2) as evidenced by a 7-fold reduction in gentamicin sensitivity following passaging. With regards to pathogenesis, 4/8 bacteria exhibited enhanced virulence following honey wound gel exposure. In the pseudomonads and S. epidermidis, this occurred in conjunction with increased haemolysis and biofilm formation, whilst P. aeruginosa also exhibited increased pyocyanin production. Where virulence attenuation was noted in a passaged wound isolate of S. aureus (WIBG 1.6), this was concomitant to delayed coagulation and reduced haemolytic potential. Overall, passaging in the presence of a manuka honey wound gel led to changes in antimicrobial sensitivity and virulence that varied between test bacteria.
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Affiliation(s)
- Jawahir A Mokhtar
- Division of Pharmacy and Optometry, Faculty of Biology, Medicine and Health, School of Health Sciences, The University of Manchester, Manchester, United Kingdom.,Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Andrew J McBain
- Division of Pharmacy and Optometry, Faculty of Biology, Medicine and Health, School of Health Sciences, The University of Manchester, Manchester, United Kingdom
| | - Ruth G Ledder
- Division of Pharmacy and Optometry, Faculty of Biology, Medicine and Health, School of Health Sciences, The University of Manchester, Manchester, United Kingdom
| | - Reem Binsuwaidan
- Division of Pharmacy and Optometry, Faculty of Biology, Medicine and Health, School of Health Sciences, The University of Manchester, Manchester, United Kingdom
| | - Victoria Rimmer
- Division of Pharmacy and Optometry, Faculty of Biology, Medicine and Health, School of Health Sciences, The University of Manchester, Manchester, United Kingdom
| | - Gavin J Humphreys
- Division of Pharmacy and Optometry, Faculty of Biology, Medicine and Health, School of Health Sciences, The University of Manchester, Manchester, United Kingdom
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Effect of manuka honey on biofilm-associated genes expression during methicillin-resistant Staphylococcus aureus biofilm formation. Sci Rep 2020; 10:13552. [PMID: 32782291 PMCID: PMC7419495 DOI: 10.1038/s41598-020-70666-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 07/31/2020] [Indexed: 12/24/2022] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) are among the most important biofilm-forming pathogens responsible for hard-to-treat infections. Looking for alternatives to antibiotics that prevent biofilm formation, we investigated the effects of manuka honey on the transcriptional profile of genes essential for staphylococcal biofilm formation using qRT-PCR. mRNA from two hospital MRSA strains (strong and weak biofilm producer) were isolated after 4, 8, 12 and 24 h from cells grown in biofilm. Manuka honey at 1/2 minimum biofilm inhibition concentration (MBIC) significantly reduced MRSA cell viability in biofilm. Manuka honey downregulated the genes encoding laminin- (eno), elastin- (ebps) and fibrinogen binding protein (fib), and icaA and icaD involved in biosynthesis of polysaccharide intercellular adhesin in both weakly and strongly adhering strain compared to the control (untreated biofilm). Expression levels of cna (collagen binding protein) and map/eap (extracellular adherence protein—Eap) were reduced in weakly adhering strain. The lowest expression of investigated genes was observed after 12 h of manuka honey treatment at 1/2 MBIC. This study showed that the previously unknown mechanism of manuka honey action involved inhibition of S. aureus adhesion due to reduction in expression of crucial genes associated with staphylococcal biofilm.
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Characterizing the Mechanism of Action of an Ancient Antimicrobial, Manuka Honey, against Pseudomonas aeruginosa Using Modern Transcriptomics. mSystems 2020; 5:5/3/e00106-20. [PMID: 32606022 PMCID: PMC7329319 DOI: 10.1128/msystems.00106-20] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Manuka honey has broad-spectrum antimicrobial activity, and unlike traditional antibiotics, resistance to its killing effects has not been reported. However, its mechanism of action remains unclear. Here, we investigated the mechanism of action of manuka honey and its key antibacterial components using a transcriptomic approach in a model organism, Pseudomonas aeruginosa We show that no single component of honey can account for its total antimicrobial action, and that honey affects the expression of genes in the SOS response, oxidative damage, and quorum sensing. Manuka honey uniquely affects genes involved in the explosive cell lysis process and in maintaining the electron transport chain, causing protons to leak across membranes and collapsing the proton motive force, and it induces membrane depolarization and permeabilization in P. aeruginosa These data indicate that the activity of manuka honey comes from multiple mechanisms of action that do not engender bacterial resistance.IMPORTANCE The threat of antimicrobial resistance to human health has prompted interest in complex, natural products with antimicrobial activity. Honey has been an effective topical wound treatment throughout history, predominantly due to its broad-spectrum antimicrobial activity. Unlike traditional antibiotics, honey-resistant bacteria have not been reported; however, honey remains underutilized in the clinic in part due to a lack of understanding of its mechanism of action. Here, we demonstrate that honey affects multiple processes in bacteria, and this is not explained by its major antibacterial components. Honey also uniquely affects bacterial membranes, and this can be exploited for combination therapy with antibiotics that are otherwise ineffective on their own. We argue that honey should be included as part of the current array of wound treatments due to its effective antibacterial activity that does not promote resistance in bacteria.
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McIver VC, Tsang AS, Symonds NE, Perkins NR, Uquillas E, Dart CM, Jeffcott LB, Dart AJ. Effects of topical treatment of cannabidiol extract in a unique manuka factor 5 manuka honey carrier on second intention wound healing on equine distal limb wounds: a preliminary study. Aust Vet J 2020; 98:250-255. [PMID: 32096215 DOI: 10.1111/avj.12932] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 01/28/2020] [Accepted: 01/30/2020] [Indexed: 12/20/2022]
Abstract
OBJECTIVE Evaluate the effect of topical 1% cannabidiol on second intention wound healing in distal limb wounds of horses. DESIGN Experimental. ANIMALS Six Standardbred horses. METHODS A total of five 2.5 cm × 2.5 cm full thickness skin wounds were created on the dorsomedial aspect of the metacarpi of 6 horses. Wounds were contaminated with faeces on the day of wound creation. Each wound was then assigned to a treatment group; compounded 1% cannabidiol in unique manuka factor (UMF) 5 manuka honey, UMF 5 manuka honey, UMF 20 manuka honey or saline. Each treatment was applied topically daily for a total of 42 days. Legs were bandaged and bandages were changed, daily, for 13 days postoperatively. Digital photographs of each wound were taken on day 1 then weekly for 6 weeks. Wound size, daily healing rate and total time to healing were recorded and compared statistically. RESULTS Irrespective of the treatment, wounds did not retract as expected in the first 7 days after wound creation. There was no difference in wound area, daily healing rate, days to complete healing between treatment groups. CONCLUSIONS This preliminary study failed to demonstrate any difference in wound healing variables between treatment groups in this model of second intention wound healing. This was unexpected due to the established effects of UMF 20 manuka honey on wound healing using the same model. This may be due to systemic effects of cannabidiol and study design. Further research into the use of cannabidiol in equine wounds is warranted.
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Affiliation(s)
- V C McIver
- Research and Clinical Training Unit, University Veterinary Teaching Hospital, The University of Sydney, Camden, New South Wales, Australia
| | - A S Tsang
- Research and Clinical Training Unit, University Veterinary Teaching Hospital, The University of Sydney, Camden, New South Wales, Australia
| | - N E Symonds
- Research and Clinical Training Unit, University Veterinary Teaching Hospital, The University of Sydney, Camden, New South Wales, Australia
| | - N R Perkins
- School of Veterinary Science, The University of Queensland, Gatton Campus, Gatton, Queensland, Australia
| | - E Uquillas
- Research and Clinical Training Unit, University Veterinary Teaching Hospital, The University of Sydney, Camden, New South Wales, Australia
| | - C M Dart
- Research and Clinical Training Unit, University Veterinary Teaching Hospital, The University of Sydney, Camden, New South Wales, Australia
| | - L B Jeffcott
- Research and Clinical Training Unit, University Veterinary Teaching Hospital, The University of Sydney, Camden, New South Wales, Australia
| | - A J Dart
- Research and Clinical Training Unit, University Veterinary Teaching Hospital, The University of Sydney, Camden, New South Wales, Australia
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Abstract
As the understanding of the primary cause of chronic rhinosinusitis has shifted away from infection toward inflammation, topical corticosteroid sprays and saline irrigations have become mainstays of treatment. Topical corticosteroid irrigations are recommended particularly in the postoperative setting, but further research on their effect and possible hypothalamic-pituitary-adrenal axis suppression is needed. The popularity of topical antibiotics has subsequently waned with their use reserved for recalcitrant cases. Further research is needed on the effect of topical antifungals in allergic fungal rhinosinusitis. Topical alternative therapies that target biofilms have gained increasing recognition, and investigations on topical probiotics are on the horizon.
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Affiliation(s)
- Victoria S Lee
- Department of Otolaryngology-Head and Neck Surgery, University of Illinois at Chicago, 1855 West Taylor Street, MC 648, Room 3.87, Chicago, IL 60611, USA.
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Schwarzer S, James GA, Goeres D, Bjarnsholt T, Vickery K, Percival SL, Stoodley P, Schultz G, Jensen SO, Malone M. The efficacy of topical agents used in wounds for managing chronic biofilm infections: A systematic review. J Infect 2019; 80:261-270. [PMID: 31899281 DOI: 10.1016/j.jinf.2019.12.017] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 12/18/2019] [Accepted: 12/24/2019] [Indexed: 12/19/2022]
Abstract
OBJECTIVES Clinicians have increasingly adopted the widespread use of topical agents to manage chronic wound infections, despite limited data on their effectiveness in vivo. This study sought to evaluate the evidence for commonly employed topical agents used in wounds for the purpose of treating chronic infections caused by biofilm. METHOD We included in vitro, animal and human in vivo studies where topical agents were tested for their efficacy against biofilms, for use in wound care. For human studies, we only included those which utilised appropriate identification techniques for visualising and confirming the presence of biofilms. RESULT A total of 640 articles were identified, with 43 included after meeting eligibility. In vitro testing accounted for 90% (n = 39) of all included studies, five studies using animal models and three human in vivo studies. Sixteen different laboratory models were utilised, with the most frequent being the minimum biofilm eradication concentration (MBEC™) / well plate assay (38%, n = 15 of 39). A total of 44 commercially available topical agents were grouped into twelve categories with the most commonly tested agents being silver, iodine and polyhexamethylene biguanide (PHMB). In vitro results on efficacy demonstrated iodine as having the highest mean log10 reductions of all agents (4.81, ±3.14). CONCLUSION There is large disparity in the translation of laboratory studies to researchers undertaking human trials relating to the effectiveness of commercially available topical agents. There is insufficient human in vivo evidence to definitively recommend any commercially available topical agent over another for the treatment of chronic wound biofilms. The heterogeneity identified between study designs (in vitro to in vivo) further limits the generalisability of results.
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Affiliation(s)
- S Schwarzer
- South West Sydney Limb Preservation and Wound Research, South West Sydney Local Health District, Sydney, Australia.
| | - G A James
- Centre for Biofilm Engineering, Montana State University, Bozeman, MT, United States
| | - D Goeres
- Centre for Biofilm Engineering, Montana State University, Bozeman, MT, United States
| | - T Bjarnsholt
- Department of Immunology and Microbiology, Costerton Biofilm Centre, University of Copenhagen, Copenhagen, Denmark; Department of Clinical Microbiology, Copenhagen University Hospital, Copenhagen, Denmark
| | - K Vickery
- Surgical Infection Research Group, Faculty of Medicine and Health Sciences, Macquarie University, Sydney Australia
| | - S L Percival
- 5D Health Protection Group Ltd, Centre of Excellence in Biofilm Science (CEBS), Liverpool Bio-Innovation Hub, Liverpool UK
| | - P Stoodley
- Departments of Microbial Infection and Immunity, and Orthopaedics, Ohio State University, Columbus, OH, United States
| | - G Schultz
- Department of Obstetrics & Gynecology, Institute for Wound Research, University of Florida, Gainesville, FL, United States
| | - S O Jensen
- South West Sydney Limb Preservation and Wound Research, South West Sydney Local Health District, Sydney, Australia; Infectious Diseases and Microbiology, School of Medicine, Ingham Institute for Applied Medical Research, Western Sydney University, United States
| | - M Malone
- South West Sydney Limb Preservation and Wound Research, South West Sydney Local Health District, Sydney, Australia; Infectious Diseases and Microbiology, School of Medicine, Ingham Institute for Applied Medical Research, Western Sydney University, United States
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Ankley LM, Monteiro MP, Camp KM, O'Quinn R, Castillo AR. Manuka honey chelates iron and impacts iron regulation in key bacterial pathogens. J Appl Microbiol 2019; 128:1015-1024. [PMID: 31782867 DOI: 10.1111/jam.14534] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 11/05/2019] [Accepted: 11/26/2019] [Indexed: 12/21/2022]
Abstract
AIM The aim of this study was to test the hypothesis that Manuka honey (MH) chelates iron and promotes an iron-limiting environment, which contributes to its antimicrobial activity. METHODS AND RESULTS Employing a ferrozine-based assay, we observed that MH is an iron chelator that depletes iron from solution. Siderophores are small molecules that bind ferric iron (III) with high affinity and their levels are upregulated by bacteria under iron-limiting conditions. We demonstrated by quantitating siderophore production that Escherichia coli and Pseudomonas aeruginosa treated with MH sub-minimum inhibitory concentrations (sub-MIC) experience an iron-limiting environment and increase siderophore production. In addition, supplementation with ferrous iron (II) significantly increased growth of E. coli, Staphylococcus aureus and P. aeruginosa cultured at their MH MIC above that observed in nonsupplemented controls. By contrast, supplementation with ferric iron (III) significantly increased growth for only E. coli and P. aeruginosa, above their nonsupplemented controls. CONCLUSIONS Manuka honey chelates iron, thereby generating an iron-limiting environment for E. coli and P. aeruginosa, and to a lesser extent S. aureus, which contributes to its antimicrobial properties. SIGNIFICANCE AND IMPACT OF THE STUDY Our work demonstrates that MH-induced iron chelation is an antimicrobial mechanism that differentially impacts the bacterial species tested here. Iron chelation affects multiple diverse physiological processes in bacteria and would contribute to the lack of bacterial resistance to MH. Iron metabolism is tightly regulated; bacteria require this essential nutrient for survival, but in excess it is toxic. Additional exploration of MH's iron chelation mechanism will facilitate its future use in mainstream medicine.
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Affiliation(s)
- L M Ankley
- Department of Biology, Eastern Washington University, Cheney, WA, USA
| | - M P Monteiro
- Department of Biology, Eastern Washington University, Cheney, WA, USA
| | - K M Camp
- Department of Biology, Eastern Washington University, Cheney, WA, USA
| | - R O'Quinn
- Department of Biology, Eastern Washington University, Cheney, WA, USA
| | - A R Castillo
- Department of Biology, Eastern Washington University, Cheney, WA, USA
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Nolan VC, Harrison J, Cox JAG. Dissecting the Antimicrobial Composition of Honey. Antibiotics (Basel) 2019; 8:E251. [PMID: 31817375 PMCID: PMC6963415 DOI: 10.3390/antibiotics8040251] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 11/29/2019] [Accepted: 12/03/2019] [Indexed: 01/22/2023] Open
Abstract
Honey is a complex sweet food stuff with well-established antimicrobial and antioxidant properties. It has been used for millennia in a variety of applications, but the most noteworthy include the treatment of surface wounds, burns and inflammation. A variety of substances in honey have been suggested as the key component to its antimicrobial potential; polyphenolic compounds, hydrogen peroxide, methylglyoxal and bee-defensin 1. These components vary greatly across honey samples due to botanical origin, geographical location and secretions from the bee. The use of medical grade honey in the treatment of surface wounds and burns has been seen to improve the healing process, reduce healing time, reduce scarring and prevent microbial contamination. Therefore, if medical grade honeys were to be included in clinical treatment, it would reduce the demand for antibiotic usage. In this review, we outline the constituents of honey and how they affect antibiotic potential in a clinical setting. By identifying the key components, we facilitate the development of an optimally antimicrobial honey by either synthetic or semisynthetic production methods.
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Affiliation(s)
| | | | - Jonathan A. G. Cox
- School of Life and Health Sciences, Aston University, Aston Triangle, Birmingham B4 7ET, UK; (V.C.N.); (J.H.)
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Lu J, Cokcetin NN, Burke CM, Turnbull L, Liu M, Carter DA, Whitchurch CB, Harry EJ. Honey can inhibit and eliminate biofilms produced by Pseudomonas aeruginosa. Sci Rep 2019; 9:18160. [PMID: 31796774 PMCID: PMC6890799 DOI: 10.1038/s41598-019-54576-2] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Accepted: 11/12/2019] [Indexed: 01/22/2023] Open
Abstract
Chronic wound treatment is becoming increasingly difficult and costly, further exacerbated when wounds become infected. Bacterial biofilms cause most chronic wound infections and are notoriously resistant to antibiotic treatments. The need for new approaches to combat polymicrobial biofilms in chronic wounds combined with the growing antimicrobial resistance crisis means that honey is being revisited as a treatment option due to its broad-spectrum antimicrobial activity and low propensity for bacterial resistance. We assessed four well-characterised New Zealand honeys, quantified for their key antibacterial components, methylglyoxal, hydrogen peroxide and sugar, for their capacity to prevent and eradicate biofilms produced by the common wound pathogen Pseudomonas aeruginosa. We demonstrate that: (1) honey used at substantially lower concentrations compared to those found in honey-based wound dressings inhibited P. aeruginosa biofilm formation and significantly reduced established biofilms; (2) the anti-biofilm effect of honey was largely driven by its sugar component; (3) cells recovered from biofilms treated with sub-inhibitory honey concentrations had slightly increased tolerance to honey; and (4) honey used at clinically obtainable concentrations completely eradicated established P. aeruginosa biofilms. These results, together with their broad antimicrobial spectrum, demonstrate that manuka honey-based wound dressings are a promising treatment for infected chronic wounds, including those with P. aeruginosa biofilms.
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Affiliation(s)
- Jing Lu
- The ithree institute, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Nural N Cokcetin
- The ithree institute, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Catherine M Burke
- The ithree institute, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Lynne Turnbull
- The ithree institute, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Michael Liu
- The ithree institute, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Dee A Carter
- School of Life and Environmental Sciences, University of Sydney, Sydney, NSW, 2006, Australia
| | - Cynthia B Whitchurch
- The ithree institute, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Elizabeth J Harry
- The ithree institute, University of Technology Sydney, Ultimo, NSW, 2007, Australia.
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Sharahi JY, Azimi T, Shariati A, Safari H, Tehrani MK, Hashemi A. Advanced strategies for combating bacterial biofilms. J Cell Physiol 2019; 234:14689-14708. [PMID: 30693517 DOI: 10.1002/jcp.28225] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 01/16/2019] [Indexed: 01/24/2023]
Abstract
Biofilms are communities of microorganisms that are formed on and attached to living or nonliving surfaces and are surrounded by an extracellular polymeric material. Biofilm formation enjoys several advantages over the pathogens in the colonization process of medical devices and patients' organs. Unlike planktonic cells, biofilms have high intrinsic resistance to antibiotics and sanitizers, and overcoming them is a significant problematic challenge in the medical and food industries. There are no approved treatments to specifically target biofilms. Thus, it is required to study and present innovative and effective methods to combat a bacterial biofilm. In this review, several strategies have been discussed for combating bacterial biofilms to improve healthcare, food safety, and industrial process.
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Affiliation(s)
- Javad Yasbolaghi Sharahi
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Taher Azimi
- Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Aref Shariati
- Department of Microbiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Hossein Safari
- Health Promotion Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Melika Khanzadeh Tehrani
- Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Ali Hashemi
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Ooi ML, Jothin A, Bennett C, Ooi EH, Vreugde S, Psaltis AJ, Wormald P. Manuka honey sinus irrigations in recalcitrant chronic rhinosinusitis: phase 1 randomized, single‐blinded, placebo‐controlled trial. Int Forum Allergy Rhinol 2019; 9:1470-1477. [DOI: 10.1002/alr.22423] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 07/24/2019] [Accepted: 08/06/2019] [Indexed: 12/12/2022]
Affiliation(s)
- Mian Li Ooi
- Department of Surgery–Otolaryngology, Head and Neck SurgeryBasil Hetzel Institute for Translational Health Research, The University of Adelaide Adelaide SA Australia
| | - Arvind Jothin
- Department of Surgery–Otolaryngology, Head and Neck SurgeryBasil Hetzel Institute for Translational Health Research, The University of Adelaide Adelaide SA Australia
| | - Catherine Bennett
- Department of Surgery–Otolaryngology, Head and Neck SurgeryBasil Hetzel Institute for Translational Health Research, The University of Adelaide Adelaide SA Australia
| | - Eng H. Ooi
- Department of Otolaryngology–Head and Neck SurgeryFlinders Medical Centre and Flinders University Bedford Park Adelaide SA Australia
| | - Sarah Vreugde
- Department of Surgery–Otolaryngology, Head and Neck SurgeryBasil Hetzel Institute for Translational Health Research, The University of Adelaide Adelaide SA Australia
| | - Alkis J. Psaltis
- Department of Surgery–Otolaryngology, Head and Neck SurgeryBasil Hetzel Institute for Translational Health Research, The University of Adelaide Adelaide SA Australia
| | - Peter‐John Wormald
- Department of Surgery–Otolaryngology, Head and Neck SurgeryBasil Hetzel Institute for Translational Health Research, The University of Adelaide Adelaide SA Australia
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Kumar Tiwari S, Guo X, Huang Y, Zhou X, Xu HHK, Ren B, Peng X, Weir MD, Li M, Cheng L. The inhibitory effect of quaternary ammonium salt on bacteria in root canal. Sci Rep 2019; 9:12463. [PMID: 31462657 PMCID: PMC6713705 DOI: 10.1038/s41598-019-48666-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 08/05/2019] [Indexed: 02/05/2023] Open
Abstract
Persisting apical periodontitis is a primary reason for multiple intervention in root canal. Persisting bacteria in root canal is related with the persisting infection. Despite the advancement in treatment strategies the persisting infection is a major challenge for endodontist. Here we tested two newly developed quaternary ammonium methacrylates (QAMs) against endodontic bacteria and their biofilms. Their antibacterial and antibiofilm efficiency were compared with chlorhexidine (CHX) and sodium hypochlorite (NaOCl). We measured the MIC, MBC and MBIC of DMADDM and DMAHDM respectively. We also detected the ratio of live/dead bacteria and bacterial composition in the biofilms treated by DMADDM and DMAHDM. We found that DMADDM and DMAHDM could inhibit the growth of bacteria and biofilms formation. The result showed that novel QAMs were remarkably efficient than CHX against biofilms. In addition, we found that Streptococcus gordonii (S. gordonii) and Enterococcus faecalis (E. faecalis) were frequent isolates after treatment with antimicrobial compounds.
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Affiliation(s)
- Sanjay Kumar Tiwari
- State Key Laboratory of Oral Diseases & National Clinical Research Centre for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
- Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Xiao Guo
- State Key Laboratory of Oral Diseases & National Clinical Research Centre for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
- Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Yannan Huang
- State Key Laboratory of Oral Diseases & National Clinical Research Centre for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
- Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases & National Clinical Research Centre for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
- Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Hockin H K Xu
- Department of Endodontics, Periodontics and Prosthodontics, University of Maryland Dental School, Baltimore, MD21201, USA
| | - Biao Ren
- State Key Laboratory of Oral Diseases & National Clinical Research Centre for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Xian Peng
- State Key Laboratory of Oral Diseases & National Clinical Research Centre for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Michael D Weir
- Department of Endodontics, Periodontics and Prosthodontics, University of Maryland Dental School, Baltimore, MD21201, USA
| | - Mingyun Li
- State Key Laboratory of Oral Diseases & National Clinical Research Centre for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China.
| | - Lei Cheng
- State Key Laboratory of Oral Diseases & National Clinical Research Centre for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China.
- Department of Operative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China.
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Afzal RK, Khalid F, Hannan A, Ahmed SA. Methylglyoxal: Antimicrobial activity against blood culture isolates of Salmonella Typhi and other Gram negative rods. Pak J Med Sci 2019; 35:1110-1114. [PMID: 31372152 PMCID: PMC6659080 DOI: 10.12669/pjms.35.4.807] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Objectives: To evaluate the activity of Methylglyoxal against the blood culture isolates of Salmonella Typhi and various Gram negative rods and to compare the activity of Methylglyoxal against S. Typhi and other Gram negative rods. Methods: It was an experimental study conducted at the Department of Microbiology, University of Health Sciences (UHS), Lahore-Pakistan in collaboration with the Department of Microbiology, CMH Lahore, from July 2011 to June 2012. Recent blood culture isolates of S. Typhi and other Gram negative rods were collected from different hospitals of Lahore and kept stored at -80°C. As per the latest CLSI guidelines, morphological, biochemical and serological identification was carried out and antimicrobial susceptibility was tested. A multi-point inoculator was used to carry out agar dilution for determination of MICs of MGO. Results were determined after compilation of data using latest SPSS version. Results: MIC90 of MGO against the clinical isolates of S. Typhi was 0.20 mg/mL (2.8 mM) and against Gram negative rods it was 0.21 mg/mL (3.0 mM). The p-value of MICs of MGO against the isolates of S. Typhi was 0.023 when compared with Gram negative rods (p<0.05; statistically significant). Conclusion: MGO has a scientifically proven in vitro antimicrobial activity against blood culture isolates of S. Typhi and various Gram negative rods.
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Affiliation(s)
- Raja Kamran Afzal
- Dr. Raja Kamran Afzal, FCPS, PhD. Department of Pathology, Armed Forces Institute of Cardiology, Rawalpindi, Pakistan
| | - Fizza Khalid
- Fizza Khalid, Department of Pathology, University of Health Sciences, Lahore, Pakistan
| | - Abdul Hannan
- Dr. Abdul Hannan, Dip Card, FRCPath. Department of Pathology, University of Health Sciences, Lahore, Pakistan
| | - Syed Azhar Ahmed
- Dr. Syed Azhar Ahmed, FRCPath, PhD. Department of Pathology, Baqai Medical University, Karachi, Pakistan
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Shan Y. Medicinal honey in clinical practice: viable alternative or useful adjunct in wound care management? ACTA ACUST UNITED AC 2019; 28:S23-S30. [DOI: 10.12968/bjon.2019.28.12.s23] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In light of concerns raised about antimicrobial resistance, especially in hospitals, and the rise in bacteria that are resistant to antibiotics scientists are examining alternative sources and strategies to combat infection. Among the plethora of complementary medicines now being considered is honey, particularly manuka honey. Medicinal honey is a relatively new label given to some types of honey that have been shown to be effective antimicrobial agents in in vitro studies. Large-scale clinical trials are yet to be conducted but there is considerable interest and numerous case studies that demonstrate the benefits of medicinal honey, especially in wound healing.
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Affiliation(s)
- Yaso Shan
- Medical Herbalist and Lecturer, Vinings Natural Health Centre, Haywards Heath
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50
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Raval YS, Mohamed A, Zmuda HM, Patel R, Beyenal H. Hydrogen-Peroxide-Generating Electrochemical Scaffold Eradicates Methicillin-Resistant Staphylococcus aureus Biofilms. GLOBAL CHALLENGES (HOBOKEN, NJ) 2019; 3:1800101. [PMID: 31218078 PMCID: PMC6551415 DOI: 10.1002/gch2.201800101] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 02/11/2019] [Indexed: 06/09/2023]
Abstract
Increasing rates of chronic wound infections caused by antibiotic-resistant bacteria are a crisis in healthcare settings. Biofilms formed by bacterial communities in these wounds create a complex environment, enabling bacteria to persist, even with antibiotic treatment. Wound infections caused by methicillin-resistant Staphylococcus aureus (MRSA) are major causes of morbidity in clinical practice. There is a need for new therapeutic interventions not based on antibiotics. Hydrogen peroxide (H2O2) is a known antibacterial/antibiofilm agent, continuous delivery of which has been challenging. A conductive electrochemical scaffold (e-scaffold) is developed, which is composed of carbon fabric that electrochemically reduces dissolved oxygen into H2O2 when polarized at -0.6 VAg/AgCl, as a novel antibiofilm wound dressing material. In this study, the in vitro antibiofilm activity of the e-scaffold against MRSA is investigated. The developed e-scaffold efficiently eradicates MRSA biofilms, based on bacterial quantitation and ATP measurements. Moreover, imaging hinted at the possibility of cell-membrane damage as a mechanism of action. These results suggest that an H2O2-generating e-scaffold may be a novel platform for eliminating MRSA biofilms without using antibiotics and may be useful to treat chronic MRSA wound infections.
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Affiliation(s)
- Yash S. Raval
- Division of Clinical MicrobiologyMayo ClinicRochesterMN55905USA
| | - Abdelrhman Mohamed
- The Gene and Voiland School of Chemical Engineering and BioengineeringWashington State UniversityPullmanWA99164USA
| | - Hannah M. Zmuda
- Division of Clinical MicrobiologyMayo ClinicRochesterMN55905USA
- The Gene and Voiland School of Chemical Engineering and BioengineeringWashington State UniversityPullmanWA99164USA
| | - Robin Patel
- Division of Clinical MicrobiologyMayo ClinicRochesterMN55905USA
- Division of Infectious DiseasesMayo ClinicRochesterMN55905USA
| | - Haluk Beyenal
- The Gene and Voiland School of Chemical Engineering and BioengineeringWashington State UniversityPullmanWA99164USA
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