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Onyango LA, Liang J. Manuka honey as a non-antibiotic alternative against Staphylococcus spp. and their small colony variant (SCVs) phenotypes. Front Cell Infect Microbiol 2024; 14:1380289. [PMID: 38868298 PMCID: PMC11168119 DOI: 10.3389/fcimb.2024.1380289] [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: 02/01/2024] [Accepted: 03/21/2024] [Indexed: 06/14/2024] Open
Abstract
The antibiotic resistance (ABR) crisis is an urgent global health priority. Staphylococci are among the problematic bacteria contributing to this emergency owing to their recalcitrance to many clinically important antibiotics. Staphylococcal pathogenesis is further complicated by the presence of small colony variants (SCVs), a bacterial subpopulation displaying atypical characteristics including retarded growth, prolific biofilm formation, heightened antibiotic tolerance, and enhanced intracellular persistence. These capabilities severely impede current chemotherapeutics, resulting in chronic infections, poor patient outcomes, and significant economic burden. Tackling ABR requires alternative measures beyond the conventional options that have dominated treatment regimens over the past 8 decades. Non-antibiotic therapies are gaining interest in this arena, including the use of honey, which despite having ancient therapeutic roots has now been reimagined as an alternative treatment beyond just traditional topical use, to include the treatment of an array of difficult-to-treat staphylococcal infections. This literature review focused on Manuka honey (MH) and its efficacy as an anti-staphylococcal treatment. We summarized the studies that have used this product and the technologies employed to study the antibacterial mechanisms that render MH a suitable agent for the management of problematic staphylococcal infections, including those involving staphylococcal SCVs. We also discussed the status of staphylococcal resistance development to MH and other factors that may impact its efficacy as an alternative therapy to help combat ABR.
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Affiliation(s)
- Laura A. Onyango
- Department of Biology, Trinity Western University, Langley, BC, Canada
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2
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Anbessa B, Lulekal E, Hymete A, Debella A, Debebe E, Abebe A, Degu S. Ethnomedicine, antibacterial activity, antioxidant potential and phytochemical screening of selected medicinal plants in Dibatie district, Metekel zone, western Ethiopia. BMC Complement Med Ther 2024; 24:199. [PMID: 38773522 PMCID: PMC11110246 DOI: 10.1186/s12906-024-04499-x] [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: 12/03/2023] [Accepted: 05/10/2024] [Indexed: 05/24/2024] Open
Abstract
BACKGROUND Medicinal plants play a major role in the delivery of healthcare, particularly among the rural population of Ethiopia. Plant extracts and their bioactive compounds have been utilized for the treatment of several diseases. This study was aimed at evaluating the antibacterial activity, antioxidant capacity, and phytochemical content of selected medicinal plants used in Dibatie district, western Ethiopia. METHODS Study plants were collected, shade dried, pulverized, extracted by maceration in 80% ethanol, and subjected to antibacterial, antioxidant, and phytochemical tests. Minimum inhibitory concentration (MIC) was determined using 96-well microplates and nutrient broth microdilution. Antioxidant activity was evaluated using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging assay. Phytochemical screening was conducted using standard test methods. RESULTS The ethanolic extract of Polystachya steudneri Rchb.f. pseudobulbs was the most active against gram-negative Proteus mirabilis, Salmonella typhimurium, Klebsiella pneumoniae, Escherichia coli, and Shigella flexneri, with MIC values of 8 ± 0, 11 ± 5, 3 ± 1, 3 ± 1, and 2 ± 0 mg/mL, respectively. The ethanolic extract of P. steudneri was also the most effective against gram-positive Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus agalactiae, and Enterococcus faecalis, with MIC values of 8 ± 0, 8 ± 0, 3 ± 1, and 16 ± 0 mg/mL, respectively. Ethanolic extracts of Gnidia involucrata Steud. ex A.Rich. stems and roots were effective antioxidants, with respective 50% DPPH free radical inhibitory concentrations (IC50) of 168.68 and 181.79 µg/mL, followed by that of P. steudneri (IC50 = 203.11 µg/mL). The study plants contained alkaloids, anthocyanins, anthraquinones, cardiac glycosides, coumarins, flavonoids, phenols, saponins, steroids, tannins, and terpenoids. CONCLUSIONS This study confirmed the antibiotic, antioxidant, and phytochemical constituents of the investigated plants and suggested further investigations that may lead to bioactive lead compounds.
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Affiliation(s)
- Baressa Anbessa
- Department of Plant Biology and Biodiversity Management, College of Natural and Computational Sciences, Addis Ababa University, Addis Ababa, Ethiopia.
- Department of Biology, College of Natural and Computational Sciences, Bule Hora University, Bule Hora, Ethiopia.
| | - Ermias Lulekal
- Department of Plant Biology and Biodiversity Management, College of Natural and Computational Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Ariaya Hymete
- Department of Pharmaceutical Chemistry and Pharmacognosy, School of Pharmacy, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Asfaw Debella
- Directorate of Modern and Traditional Medicine Research, Ethiopian Public Health Institute, Addis Ababa, Ethiopia
| | - Eyob Debebe
- Traditional and Modern Medicine Research and Development Directorate, Armauer Hansen Research Institute, Addis Ababa, Ethiopia
| | - Abiy Abebe
- Traditional and Modern Medicine Research and Development Directorate, Armauer Hansen Research Institute, Addis Ababa, Ethiopia
| | - Sileshi Degu
- Traditional and Modern Medicine Research and Development Directorate, Armauer Hansen Research Institute, Addis Ababa, Ethiopia
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Moreno Florez AI, Malagon S, Ocampo S, Leal-Marin S, Ossa EA, Glasmacher B, Garcia C, Pelaez-Vargas A. In vitro evaluation of the osteogenic and antimicrobial potential of porous wollastonite scaffolds impregnated with ethanolic extracts of propolis. Front Bioeng Biotechnol 2024; 12:1321466. [PMID: 38361789 PMCID: PMC10867276 DOI: 10.3389/fbioe.2024.1321466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Accepted: 01/11/2024] [Indexed: 02/17/2024] Open
Abstract
Context: The development of porous devices using materials modified with various natural agents has become a priority for bone healing processes in the oral and maxillofacial field. There must be a balance between the proliferation of eukaryotic and the inhibition of prokaryotic cells to achieve proper bone health. Infections might inhibit the formation of new alveolar bone during bone graft augmentation. Objective: This study aimed to evaluate the in vitro osteogenic behavior of human bone marrow stem cells and assess the antimicrobial response to 3D-printed porous scaffolds using propolis-modified wollastonite. Methodology: A fractional factorial design of experiments was used to obtain a 3D printing paste for developing scaffolds with a triply periodic minimal surface (TPMS) gyroid geometry based on wollastonite and modified with an ethanolic propolis extract. The antioxidant activity of the extracts was characterized using free radical scavenging methods (DPPH and ABTS). Cell proliferation and osteogenic potential using Human Bone Marrow Stem Cells (bmMSCs) were assessed at different culture time points up to 28 days. MIC and inhibition zones were studied from single strain cultures, and biofilm formation was evaluated on the scaffolds under co-culture conditions. The mechanical strength of the scaffolds was evaluated. Results: Through statistical design of experiments, a paste suitable for printing scaffolds with the desired geometry was obtained. Propolis extracts modifying the TPMS gyroid scaffolds showed favorable cell proliferation and metabolic activity with osteogenic potential after 21 days. Additionally, propolis exhibited antioxidant activity, which may be related to the antimicrobial effectiveness of the scaffolds against S. aureus and S. epidermidis cultures. The mechanical properties of the scaffolds were not affected by propolis impregnation. Conclusion: These results demonstrate that propolis-impregnated porous wollastonite scaffolds might have the potential to stimulate bone repair in maxillofacial tissue engineering applications.
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Affiliation(s)
- Ana Isabel Moreno Florez
- Grupo de Materiales Cerámicos y Vítreos, Universidad Nacional de Colombia Sede Medellín, Medellín, Colombia
| | - Sarita Malagon
- Grupo GIOM, Facultad de Odontología, Universidad Cooperativa de Colombia, Sede Medellín, Colombia
| | - Sebastian Ocampo
- Grupo de Materiales Cerámicos y Vítreos, Universidad Nacional de Colombia Sede Medellín, Medellín, Colombia
| | - Sara Leal-Marin
- Institute for Multiphase Processes (IMP), Leibniz University Hannover, Garbsen, Germany
- Lower Saxony Center for Biomedical Engineering, Implant Research and Development, Hannover, Germany
| | - Edgar Alexander Ossa
- School of Applied Sciences and Engineering, Universidad Eafit, Medellín, Colombia
| | - Birgit Glasmacher
- Institute for Multiphase Processes (IMP), Leibniz University Hannover, Garbsen, Germany
- Lower Saxony Center for Biomedical Engineering, Implant Research and Development, Hannover, Germany
| | - Claudia Garcia
- Grupo de Materiales Cerámicos y Vítreos, Universidad Nacional de Colombia Sede Medellín, Medellín, Colombia
| | - Alejandro Pelaez-Vargas
- Grupo GIOM, Facultad de Odontología, Universidad Cooperativa de Colombia, Sede Medellín, Colombia
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Siciliano V, Passerotto RA, Chiuchiarelli M, Leanza GM, Ojetti V. Difficult-to-Treat Pathogens: A Review on the Management of Multidrug-Resistant Staphylococcus epidermidis. Life (Basel) 2023; 13:life13051126. [PMID: 37240771 DOI: 10.3390/life13051126] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 04/23/2023] [Accepted: 04/27/2023] [Indexed: 05/28/2023] Open
Abstract
Multidrug-resistant Staphylococcus epidermidis (MDRSE) is responsible for difficult-to-treat infections in humans and hospital-acquired-infections. This review discusses the epidemiology, microbiology, diagnosis, and treatment of MDRSE infection and identifies knowledge gaps. By using the search term "pan resistant Staphylococcus epidermidis" OR "multi-drug resistant Staphylococcus epidermidis" OR "multidrug-resistant lineages of Staphylococcus epidermidis", a total of 64 records have been identified from various previously published studies. The proportion of methicillin resistance in S. epidermidis has been reported to be as high as 92%. Several studies across the world have aimed to detect the main phylogenetic lineages and antibiotically resistant genes through culture, mass spectrometry, and genomic analysis. Molecular biology tools are now available for the identification of S. epidermidis and its drug resistance mechanisms, especially in blood cultures. However, understanding the distinction between a simple colonization and a bloodstream infection (BSI) caused by S. epidermidis is still a challenge for clinicians. Some important parameters to keep in mind are the number of positive samples, the symptoms and signs of the patient, the comorbidities of the patient, the presence of central venous catheter (CVC) or other medical device, and the resistance phenotype of the organism. The agent of choice for empiric parenteral therapy is vancomycin. Other treatment options, depending on different clinical settings, may include teicoplanin, daptomycin, oxazolidinones, long-acting lipoglycopeptides, and ceftaroline. For patients with S. epidermidis infections associated with the presence of an indwelling device, assessment regarding whether the device warrants removal is an important component of management. This study provides an overview of the MDRSE infection. Further studies are needed to explore and establish the most correct form of management of this infection.
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Affiliation(s)
- Valentina Siciliano
- Dipartimento di Scienze di Laboratorio e Infettivologiche, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy
| | - Rosa Anna Passerotto
- Dipartimento di Sicurezza e Bioetica, Università Cattolica del S. Cuore, 00168 Rome, Italy
| | - Marta Chiuchiarelli
- Dipartimento di Sicurezza e Bioetica, Università Cattolica del S. Cuore, 00168 Rome, Italy
| | - Gabriele Maria Leanza
- Dipartimento di Sicurezza e Bioetica, Università Cattolica del S. Cuore, 00168 Rome, Italy
| | - Veronica Ojetti
- Dipartimento di Emergenza e Accettazione, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy
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Aras A, Rizvanoglu SS, Tanriverdi ES, Karaca B, Eryilmaz M. The Effects of Antiperspirant Aluminum Chlorohydrate on the Development of Antibiotic Resistance in Staphylococcus epidermidis. Microorganisms 2023; 11:microorganisms11040948. [PMID: 37110371 PMCID: PMC10146609 DOI: 10.3390/microorganisms11040948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 03/31/2023] [Accepted: 04/04/2023] [Indexed: 04/08/2023] Open
Abstract
This study investigates the effects of the antiperspirant aluminum chlorohydrate on the development of antibiotic resistance in commensal Staphylococcus epidermidis isolates. The isolates were exposed to aluminum chlorohydrate for 30 days. The bacteria that developed resistance to oxacillin and ciprofloxacin were isolated, and the expression levels of some antibiotic resistance genes were determined using quantitative reverse transcriptase PCR. Before and after exposure, the minimum inhibitory concentration (MIC) values of the bacteria were determined using the microdilution method. A time-dependent increase was observed in the number of bacteria that developed resistance and increased MIC values. Consistent with the ciprofloxacin resistance observed after exposure, an increase in norA, norB/C, gyrA, gyrB, parC, and parE gene expression was observed. In addition to aluminum chlorohydrate exposure, oxacillin resistance was observed in all test bacteria in the group only subcultured in the medium, suggesting that phenotypic resistance cannot be correlated with chemical exposure in light of these data. The increase in mecA gene expression in selected test bacteria that acquired resistance to oxacillin after exposure compared with control groups suggests that the observed resistance may have been related to aluminum chlorohydrate exposure. To our knowledge, this is the first time in the literature that the effects of aluminum chlorohydrate as an antiperspirant on the development of antibiotic resistance in Staphylococcus epidermidis have been reported.
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Affiliation(s)
- Ayse Aras
- Turkish Medicines and Medical Devices Agency, Cosmetic Products Department, Ankara 06500, Türkiye
| | - Suna Sibel Rizvanoglu
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Ankara University, Ankara 06100, Türkiye
| | - Elif Seren Tanriverdi
- Department of Medical Microbiology, Faculty of Medicine, Inonu University, Malatya 44210, Türkiye
| | - Basar Karaca
- Department of Biology, Faculty of Science, Ankara University, Ankara 06100, Türkiye
| | - Mujde Eryilmaz
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Ankara University, Ankara 06100, Türkiye
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Afeke I, Amegan-Aho KH, Adu-Amankwaah J, Orish VN, Mensah GL, Mbroh HK, Jamfaru I, Hamid AWM, Ankrah LM, Korbuvi J, Ablordey A. Antimicrobial profile of coagulase-negative staphylococcus isolates from categories of individuals at a neonatal intensive care unit of a tertiary hospital, Ghana. Pan Afr Med J 2023; 44:92. [PMID: 37229305 PMCID: PMC10204107 DOI: 10.11604/pamj.2023.44.92.37229] [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: 09/07/2022] [Accepted: 10/23/2022] [Indexed: 05/27/2023] Open
Abstract
Introduction we compared the antimicrobial resistance profile of young infants' clinical isolates (from blood samples) of Staphylococcus epidermidis and haemolyticus with those colonizing mothers, clinical staff, and students. Also, screened for resistance to the watch and reserve classified groups, antibiotics not prescribed in the Ho Teaching Hospital (HTH), Ghana. Methods a cross-sectional study was conducted from March to June 2018 to determine the antimicrobial susceptibility of twenty-one antimicrobials for 123 isolates consisting of 54 S. epidermidis and 69 S. haemolyticus cultured from the participants. VITEK 2 was used for antimicrobial susceptibility testing. Staphylococcal species were identified using matrix-assisted laser desorption/ionization-time of flight (MALDI-TOF). Statistical analysis was done with Grad-Pad prism. Results for S. epidermidis, clinical staff isolates have the highest methicillin-resistant (65%), followed by young infants' (50%) and mothers' and students' twenty-five percent each. Both young infants and clinical staff's Staphylococcus haemolyticus isolates have 100% methicillin-resistant, while mothers' and students' ones have 82% and 63%, respectively. We have identified resistance to one watch (teicoplanin), two reserves (tigecycline and fosfomycin) antimicrobial groups, and mupirocin, an unclassified group. Conclusion identifying coagulase-negative staphylococci (CoNS) resistance to watch and reserve groups of antimicrobials in a non-previously exposed hospital calls for further studies to determine molecular mechanisms of resistance to these antimicrobials.
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Affiliation(s)
- Innocent Afeke
- Department of Medical Laboratory Sciences, School of Allied Health Sciences, University of Health and Allied Sciences, Ho, Ghana
| | - Kokou Hefoume Amegan-Aho
- Department of Pediatrics, School of Medicine, University of Health and Allied Sciences, Ho, Ghana
| | | | - Verner Ndudiri Orish
- Department of Microbiology and Immunology, School of Medicine, University of Health and Allied Sciences, Ho, Ghana
| | | | | | - Ibrahim Jamfaru
- Department of Microbiology and Immunology, School of Medicine, University of Health and Allied Sciences, Ho, Ghana
| | - Abdul-Wahab Mawuko Hamid
- Department of Medical Laboratory Sciences, School of Allied Health Sciences, University of Health and Allied Sciences, Ho, Ghana
| | - Lennox Mac Ankrah
- Department of Microbiology and Immunology, School of Medicine, University of Health and Allied Sciences, Ho, Ghana
| | - John Korbuvi
- Department of Pharmacy, Ho Teaching Hospital, Ho, Ghana
| | - Anthony Ablordey
- Department of Bacteriology, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana
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7
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Ahlschwede KM, Amissah F, Deshmukh R. Evaluating the effect of cationic peptide K16ApoE against Staphylococcus epidermidis biofilms. JOURNAL OF PHARMACEUTICAL INVESTIGATION 2021. [DOI: 10.1007/s40005-021-00552-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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Özkan ER, Öztürk Hİ, Demirci T, Akın N. Detection of biofilm formation, virulence factor genes, antibiotic-resistance, adherence properties, and some beneficial properties of cheese origin S. infantarius, S. gallolyticus, and S. lutetiensis strains belonging to the S. bovis/S. equinus complex. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2021.112077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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9
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Muñoz M, Comtois-Bona M, Cortes D, Cimenci CE, Du Q, Thompson C, Figueroa JD, Franklin V, Liu P, Alarcon EI. Integrated photothermal decontamination device for N95 respirators. Sci Rep 2021; 11:1822. [PMID: 33469049 PMCID: PMC7815715 DOI: 10.1038/s41598-020-80908-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 12/24/2020] [Indexed: 02/07/2023] Open
Abstract
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) responsible for the COVID-19 global pandemic has infected over 25 million people worldwide and resulted in the death of millions. The COVID-19 pandemic has also resulted in a shortage of personal protective equipment (PPE) in many regions around the world, particularly in middle- and low-income countries. The shortages of PPE, such as N95 respirators, is something that will persist until an effective vaccine is made available. Thus, devices that while being easy to operate can also be rapidly deployed in health centers, and long-term residences without the need for major structural overhaul are instrumental to sustainably use N95 respirators. In this report, we present the design and validation of a decontamination device that combines UV-C & B irradiation with mild-temperature treatment. The device can decontaminate up to 20 masks in a cycle of < 30 min. The decontamination process did not damage or reduce the filtering capacity of the masks. Further, the efficacy of the device to eliminate microbes and viruses from the masks was also evaluated. The photothermal treatment of our device was capable of eradicating > 99.9999% of the bacteria and > 99.99% of the virus tested.
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Affiliation(s)
- Marcelo Muñoz
- Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, ON, K1Y4W7, Canada
- Biochemistry, Microbiology, and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, ON, K1H8M5, Canada
| | - Maxime Comtois-Bona
- Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, ON, K1Y4W7, Canada
- Biomedical Mechanical Engineering, University of Ottawa, 800 King Edward Ave, Ottawa, ON, K1N6N5, Canada
| | - David Cortes
- Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, ON, K1Y4W7, Canada
- Biomedical Mechanical Engineering, University of Ottawa, 800 King Edward Ave, Ottawa, ON, K1N6N5, Canada
| | - Cagla Eren Cimenci
- Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, ON, K1Y4W7, Canada
- Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON, K1H8M5, Canada
| | - Qiujiang Du
- Cardiac Function Laboratory, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, ON, K1Y4W7, Canada
| | - Collin Thompson
- Occupational Health, Safety and Biosafety, University of Ottawa Heart Institute, 40 Ruskin street, Ottawa, ON, K1Y4W7, Canada
| | - Juan David Figueroa
- Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, ON, K1Y4W7, Canada
| | - Vivian Franklin
- Laboratory Research Resources, Office of Research Services, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, ON, K1Y4W7, Canada
| | - Peter Liu
- Cardiac Function Laboratory, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, ON, K1Y4W7, Canada
| | - Emilio I Alarcon
- Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, ON, K1Y4W7, Canada.
- Biochemistry, Microbiology, and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, ON, K1H8M5, Canada.
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10
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Long Y, Wu M, Kwoh CK, Luo J, Li X. Predicting human microbe-drug associations via graph convolutional network with conditional random field. Bioinformatics 2020; 36:4918-4927. [PMID: 32597948 PMCID: PMC7559035 DOI: 10.1093/bioinformatics/btaa598] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 05/31/2020] [Accepted: 06/20/2020] [Indexed: 12/23/2022] Open
Abstract
Motivation Human microbes play critical roles in drug development and precision medicine. How to systematically understand the complex interaction mechanism between human microbes and drugs remains a challenge nowadays. Identifying microbe-drug associations can not only provide great insights into understanding the mechanism, but also boost the development of drug discovery and repurposing. Considering the high cost and risk of biological experiments, the computational approach is an alternative choice. However, at present, few computational approaches have been developed to tackle this task. Results In this work, we leveraged rich biological information to construct a heterogeneous network for drugs and microbes, including a microbe similarity network, a drug similarity network, and a microbe-drug interaction network. We then proposed a novel Graph Convolutional Network (GCN) based framework for predicting human Microbe-Drug Associations, named GCNMDA. In the hidden layer of GCN, we further exploited the Conditional Random Field (CRF), which can ensure that similar nodes (i.e., microbes or drugs) have similar representations. To more accurately aggregate representations of neighborhoods, an attention mechanism was designed in the CRF layer. Moreover, we performed a random walk with restart (RWR) based scheme on both drug and microbe similarity networks to learn valuable features for drugs and microbes respectively. Experimental results on three different datasets showed that our GCNMDA model consistently achieved better performance than seven state-of-the-art methods. Case studies for three microbes including SARS-CoV-2 and two antimicrobial drugs (i.e., Ciprofloxacin and Moxifloxacin) further confirmed the effectiveness of GCNMDA in identifying potential microbe-drug associations. Availability Python codes and dataset are available at: https://github.com/longyahui/GCNMDA. Supplementary information Supplementary data are available at Bioinformatics online.
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Affiliation(s)
- Yahui Long
- College of Computer Science and Electronic Engineering, Hunan University, Changsha 410000, China.,School of Computer Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Min Wu
- Machine Intellection Department, Institute for Infocomm Research, Agency for Science, Technology and Research (A*STAR), Singapore 138632, Singapore
| | - Chee Keong Kwoh
- School of Computer Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Jiawei Luo
- College of Computer Science and Electronic Engineering, Hunan University, Changsha 410000, China
| | - Xiaoli Li
- Machine Intellection Department, Institute for Infocomm Research, Agency for Science, Technology and Research (A*STAR), Singapore 138632, Singapore
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Aelenei P, Rimbu CM, Horhogea CE, Lobiuc A, Neagu AN, Dunca SI, Motrescu I, Dimitriu G, Aprotosoaie AC, Miron A. Prenylated phenolics as promising candidates for combination antibacterial therapy: Morusin and kuwanon G. Saudi Pharm J 2020; 28:1172-1181. [PMID: 33132710 PMCID: PMC7584796 DOI: 10.1016/j.jsps.2020.08.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 08/11/2020] [Indexed: 12/20/2022] Open
Abstract
Combination of antibiotics with natural products is a promising strategy for potentiating antibiotic activity and overcoming antibiotic resistance. The purpose of the present study was to investigate whether morusin and kuwanon G, prenylated phenolics in Morus species, have the ability to enhance antibiotic activity and reverse antibiotic resistance in Staphylococcus aureus and Staphylococcus epidermidis. Commonly used antibiotics (oxacillin, erythromycin, gentamicin, ciprofloxacin, tetracycline, clindamycin) were selected for the combination studies. Checkerboard and time-kill assays were used to investigate potential bacteriostatic and bactericidal synergistic interactions, respectively between morusin or kuwanon G and antibiotics. According to both fractional inhibitory concentration index and response surface models, twenty combinations (14 morusin-antibiotic combinations, six kuwanon G-antibiotic combinations) displaying bacteriostatic synergy were identified, with 4–512-fold reduction in the minimum inhibitory concentration values of antibiotics in combination. Both morusin and kuwanon G reversed oxacillin resistance of methicillin-resistant Staphylococcus aureus. In addition, morusin reversed tetracycline resistance of Staphylococcus epidermidis. At half of the minimum inhibitory concentrations, combinations of morusin with oxacillin or gentamicin showed bactericidal synergy against methicillin-resistant Staphylococcus aureus. Fluorescence and differential interference contrast microscopy and scanning electron microscopy showed an increase in the membrane permeability and massive leakage of cellular content in methicillin-resistant Staphylococcus aureus exposed to morusin or kuwanon G. Overall, our findings strongly indicate that both prenylated compounds are good candidates for the development of novel antibacterial combination therapies.
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Affiliation(s)
- Petruta Aelenei
- Department of Pharmacognosy, Faculty of Pharmacy, Grigore T. Popa University of Medicine and Pharmacy Iasi, Universitatii Str. 16, Iasi 700115, Romania.,Regulatory Affairs Department, Fiterman Pharma LLC, Pacurari Road 127, Iasi 700544, Romania
| | - Cristina Mihaela Rimbu
- Department of Public Health, Faculty of Veterinary Medicine, Ion Ionescu de la Brad University of Agricultural Sciences and Veterinary Medicine of Iasi, Mihail Sadoveanu Al. 8, Iasi 700489, Romania
| | - Cristina Elena Horhogea
- Department of Public Health, Faculty of Veterinary Medicine, Ion Ionescu de la Brad University of Agricultural Sciences and Veterinary Medicine of Iasi, Mihail Sadoveanu Al. 8, Iasi 700489, Romania
| | - Andrei Lobiuc
- Human Health and Development Department, Stefan cel Mare University of Suceava, Universitatii Str. 13, Suceava 720229, Romania.,Integrated Research Centre for Environmental Studies in the N-E Area - CERNESIM, L2 Laboratory, Alexandru Ioan Cuza University of Iasi, Carol I Bd. 20A, Iasi 700506, Romania
| | - Anca-Narcisa Neagu
- Faculty of Biology, Alexandru Ioan Cuza University of Iasi, Carol I Bd. 20A, Iasi 700505, Romania
| | - Simona Isabela Dunca
- Faculty of Biology, Alexandru Ioan Cuza University of Iasi, Carol I Bd. 20A, Iasi 700505, Romania
| | - Iuliana Motrescu
- Science Department & Research Institute for Agriculture and Environment, Ion Ionescu de la Brad University of Agricultural Sciences and Veterinary Medicine of Iasi, Mihail Sadoveanu Al. 3, Iasi 700490, Romania
| | - Gabriel Dimitriu
- Department of Medical Informatics and Biostatistics, Faculty of Medicine, Grigore T. Popa University of Medicine and Pharmacy Iasi, Universitatii Str. 16, Iasi 700115, Romania
| | - Ana Clara Aprotosoaie
- Department of Pharmacognosy, Faculty of Pharmacy, Grigore T. Popa University of Medicine and Pharmacy Iasi, Universitatii Str. 16, Iasi 700115, Romania
| | - Anca Miron
- Department of Pharmacognosy, Faculty of Pharmacy, Grigore T. Popa University of Medicine and Pharmacy Iasi, Universitatii Str. 16, Iasi 700115, Romania
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12
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Angarano V, Smet C, Akkermans S, Watt C, Chieffi A, Van Impe JF. Visible Light as an Antimicrobial Strategy for Inactivation of Pseudomonas fluorescens and Staphylococcus epidermidis Biofilms. Antibiotics (Basel) 2020; 9:E171. [PMID: 32290162 PMCID: PMC7235755 DOI: 10.3390/antibiotics9040171] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 04/06/2020] [Accepted: 04/07/2020] [Indexed: 12/13/2022] Open
Abstract
The increase of antimicrobial resistance is challenging the scientific community to find solutions to eradicate bacteria, specifically biofilms. Light-Emitting Diodes (LED) represent an alternative way to tackle this problem in the presence of endogenous or exogenous photosensitizers. This work adds to a growing body of research on photodynamic inactivation using visible light against biofilms. Violet (400 nm), blue (420 nm), green (570 nm), yellow (584 nm) and red (698 nm) LEDs were used against Pseudomonas fluorescens and Staphylococcus epidermidis. Biofilms, grown on a polystyrene surface, were irradiated for 4 h. Different irradiance levels were investigated (2.5%, 25%, 50% and 100% of the maximum irradiance). Surviving cells were quantified and the inactivation kinetic parameters were estimated. Violet light could successfully inactivate P. fluorescens and S. epidermidis (up to 6.80 and 3.69 log10 reduction, respectively), while blue light was effective only against P. fluorescens (100% of maximum irradiance). Green, yellow and red irradiation neither increased nor reduced the biofilm cell density. This is the first research to test five different wavelengths (each with three intensities) in the visible spectrum against Gram-positive and Gram-negative biofilms. It provides a detailed study of the potential of visible light against biofilms of a different Gram-nature.
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Affiliation(s)
- Valeria Angarano
- BioTeC+, Chemical and Biochemical Process Technology and Control, Department of Chemical Engineering, KU Leuven, 9000 Gent, Belgium; (V.A.); (C.S.); (S.A.); (C.W.)
| | - Cindy Smet
- BioTeC+, Chemical and Biochemical Process Technology and Control, Department of Chemical Engineering, KU Leuven, 9000 Gent, Belgium; (V.A.); (C.S.); (S.A.); (C.W.)
| | - Simen Akkermans
- BioTeC+, Chemical and Biochemical Process Technology and Control, Department of Chemical Engineering, KU Leuven, 9000 Gent, Belgium; (V.A.); (C.S.); (S.A.); (C.W.)
| | - Charlotte Watt
- BioTeC+, Chemical and Biochemical Process Technology and Control, Department of Chemical Engineering, KU Leuven, 9000 Gent, Belgium; (V.A.); (C.S.); (S.A.); (C.W.)
| | - Andre Chieffi
- Procter & Gamble, Newcastle Innovation Center, Newcastle NE12 9TS, UK;
| | - Jan F.M. Van Impe
- BioTeC+, Chemical and Biochemical Process Technology and Control, Department of Chemical Engineering, KU Leuven, 9000 Gent, Belgium; (V.A.); (C.S.); (S.A.); (C.W.)
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13
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Benjelloun Touimi G, Bennani L, Berrada S, Moussa B, Bennani B. Prevalence and antibiotic resistance profiles of Staphylococcus sp. isolated from food, food contact surfaces and food handlers in a Moroccan hospital kitchen. Lett Appl Microbiol 2020; 70:241-251. [PMID: 31984518 DOI: 10.1111/lam.13278] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Revised: 12/28/2019] [Accepted: 01/14/2020] [Indexed: 12/21/2022]
Abstract
Food poisoning risk related to the consumption of contaminated food with known foodborne pathogens or antibiotic-resistant bacteria is currently a serious threat for public health. Thus, pathogenic methicillin-resistant Staphylococcus strains are considered as one of the major cause of foodborne diseases in hospitals. The present study aims to determine the prevalence and the antibiotic resistance patterns of Staphylococcus in various types of hospital food samples, work surfaces and its carriage by food handlers. A total of 608 collected samples including 300 food samples, 238 food contact surfaces and 70 nasal and hand samples were tested. The identified Staphylococcus and their antibiotic resistance patterns were analysed using the agar disk-diffusion and PCR method was used for mecA resistance gene amplification. The prevalence of S. aureus and the coagulase-negative staphylococci were 17·33 and 23·33%, respectively. The antibiotic resistance reached 100% towards oxacillin and Penicillin G for both S. aureus and CoNs. The mecA gene was detected in 5·71% (4/70) and 7·69% (4/52) of S. aureus and CoNs strains, respectively. The outcome of this study enlightens isolation of MRSA strains and resistant CoNs from food, food contact surfaces and food handlers. The presence of this resistant species in this critical setting, where products were intended to vulnerable and immunocompromised patients, represents a serious threat to this community. It can be a source of nosocomial infection and more precautions must be taken to prevent staphylococci food contamination mainly in hospitals. SIGNIFICANCE AND IMPACT OF THE STUDY: This is the first study describing the antibiotic resistance patterns of Staphylococcus aureus and coagulase-negative Staphylococcus isolated from hospital food, food contact surfaces and food handlers samples in a Moroccan hospital kitchen. High levels of multi-resistance were reported. The alarming outcome of this study emphasizes the crucial need of implementing an approach to fight multidrug-resistant staphylococci mainly in healthcare settings, where the community have already compromised health issues.
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Affiliation(s)
- G Benjelloun Touimi
- Laboratory of Human Pathology Biomedicine and Environment, Faculty of Medicine and Pharmacy of Fez (FMPF), Sidi Mohammed Ben Abdellah University (USMBA), Fez, Morocco.,Faculty of Sciences and Techniques of Fez (FSTF), USMBA, Fez, Morocco
| | - L Bennani
- Laboratory of Human Pathology Biomedicine and Environment, Faculty of Medicine and Pharmacy of Fez (FMPF), Sidi Mohammed Ben Abdellah University (USMBA), Fez, Morocco.,The Superior Institute of Nursing Professions and Health Technology of Fez (ISPITS), Fez, Morocco
| | - S Berrada
- The Superior Institute of Nursing Professions and Health Technology of Fez (ISPITS), Fez, Morocco
| | - B Moussa
- Nursing Department, Hassan II University Hospital, Fez, Morocco
| | - B Bennani
- Laboratory of Human Pathology Biomedicine and Environment, Faculty of Medicine and Pharmacy of Fez (FMPF), Sidi Mohammed Ben Abdellah University (USMBA), Fez, Morocco
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14
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Chabi R, Momtaz H. Virulence factors and antibiotic resistance properties of the Staphylococcus epidermidis strains isolated from hospital infections in Ahvaz, Iran. Trop Med Health 2019; 47:56. [PMID: 31844416 PMCID: PMC6896349 DOI: 10.1186/s41182-019-0180-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2019] [Accepted: 09/26/2019] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Resistant Staphylococcus epidermidis strains are considered to be one of the major causes of human clinical infections in hospitals. The present investigation was done to study the pattern of antibiotic resistance and the prevalence of virulence and antibiotic resistance genes amongst the S. epidermidis strains isolated from human hospital infections. METHODS One hundred hospital infectious samples were collected and S. epidermidis strains were identified using culture and biochemical tests. Isolated strains were subjected to disk diffusion and PCR. RESULTS Forty-six out of 100 hospital infectious samples (46%) were positive for S. epidermidis. S. epidermidis strains harbored the highest prevalence of resistance against penicillin (95.65%), tetracycline (91.30%), erythromycin (82.60%), cefazolin (78.26%), and trimethoprim-sulfamethoxazole (73.91%). All S. epidermidis strains had resistance against at least three different types of antibiotics, while the prevalence of resistance against more than seven types of antibiotics was 17.39%. AacA-D (69.56%), tetK (56.52%), mecA (45.65%), msrA (39.13%), and tetM (39.13%) were most commonly detected antibiotic resistance genes. The prevalence of vatC (4.34%), ermA (8.69%), vatA (8.69%), vatB (13.04%), ermC (13.04%), and linA (10.86%) were lower than other detected antibiotic resistance genes. ClfA (32.60%), agrIII (17.39%), and etB (13.04%) were the most commonly detected virulence factors. CONCLUSIONS The presence of virulent and multi-drug resistance S. epidermidis strains showed an important public health issue in hospitals.
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Affiliation(s)
- Roya Chabi
- Department of Microbiology, Shahrekord Branch, Islamic Azad University, PO. Box: 166, Shahrekord, Iran
| | - Hassan Momtaz
- Department of Microbiology, Shahrekord Branch, Islamic Azad University, PO. Box: 166, Shahrekord, Iran
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