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Mart'yanov SV, Gannesen AV, Plakunov VK. A New Method for Obtaining Monospecies and Binary Cultures of Staphylococcus spp. in Alginate Gel and the Study of the Action of Active Compounds on These Cultures on the Example of Catecholamines. Bull Exp Biol Med 2024:10.1007/s10517-024-06217-6. [PMID: 39266918 DOI: 10.1007/s10517-024-06217-6] [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: 11/30/2023] [Indexed: 09/14/2024]
Abstract
A simple and efficient method for obtaining monospecies and binary Staphylococcus aureus and Staphylococcus epidermidis cultures in sodium alginate gel matrix mimicking the natural microenvironment of the nasal cavity was proposed. The cultures were used for studying the effect of norepinephrine on monospecies and binary communities of two types of bacteria, S. aureus (invasive strain) and S. epidermis (commensal strain). After 24-h incubation, S. aureus predominated in the binary community, but later it was replaced by S. epidermis. Norepinephrine at higher concentrations accelerated this process without principally changing it. The model can be used to develop more effective complex antimicrobial drugs.
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Affiliation(s)
- S V Mart'yanov
- Federal Research Centre Fundamentals of Biotechnology, Russian Academy of Sciences, Moscow, Russia.
| | - A V Gannesen
- Federal Research Centre Fundamentals of Biotechnology, Russian Academy of Sciences, Moscow, Russia
| | - V K Plakunov
- Federal Research Centre Fundamentals of Biotechnology, Russian Academy of Sciences, Moscow, Russia
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2
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Wathoni N, Suhandi C, Elamin KM, Lesmana R, Hasan N, Mohammed AFA, El-Rayyes A, Wilar G. Advancements and Challenges of Nanostructured Lipid Carriers for Wound Healing Applications. Int J Nanomedicine 2024; 19:8091-8113. [PMID: 39161361 PMCID: PMC11332415 DOI: 10.2147/ijn.s478964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2024] [Accepted: 07/26/2024] [Indexed: 08/21/2024] Open
Abstract
The current treatments for wound healing still exhibit drawbacks due to limited availability at the action sites, susceptibility to degradation, and immediate drug release, all of which are detrimental in chronic conditions. Nano-modification strategies, offering various advantages that can enhance the physicochemical properties of drugs, have been employed in efforts to maximize the efficacy of wound healing medications. Nowadays, nanostructured lipid carriers (NLCs) provide drug delivery capabilities that can safeguard active compounds from environmental influences and enable controlled release profiles. Consequently, NLCs are considered an alternative therapy to address the challenges encountered in wound treatment. This review delves into the application of NLCs in drug delivery for wound healing, encompassing discussions on their composition, preparation methods, and their impact on treatment effectiveness. The modification of drugs into the NLC model can be facilitated using relatively straightforward technologies such as pressure-based processes, emulsification techniques, solvent utilization methods, or phase inversion. Moreover, NLC production with minimal material compositions can accommodate both single and combination drug delivery. Through in vitro, in vivo, and clinical studies, it has been substantiated that NLCs can enhance the therapeutic potential of various drug types in wound healing treatments. NLCs enhance efficacy by reducing the active substance particle size, increasing solubility and bioavailability, and prolonging drug release, ensuring sustained dosage at the wound site for chronic wounds. In summary, NLCs represent an effective nanocarrier system for optimizing the bioavailability of active pharmacological ingredients in the context of wound healing.
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Affiliation(s)
- Nasrul Wathoni
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Universitas Padjadjaran, Jatinangor, 45363, Indonesia
| | - Cecep Suhandi
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Universitas Padjadjaran, Jatinangor, 45363, Indonesia
| | - Khaled M Elamin
- Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, 862-0973, Japan
| | - Ronny Lesmana
- Physiology Division, Department of Biomedical Science, Faculty of Medicine, Universitas Padjadjaran, Bandung, Indonesia
- Biological Activity Division, Central Laboratory, Universitas Padjadjaran, Bandung, Indonesia
| | - Nurhasni Hasan
- Department of Pharmacy Science and Technology, Faculty of Pharmacy, Universitas Hasanuddin, Makassar, 90245, Indonesia
| | | | - Ali El-Rayyes
- Department of Chemistry, College of Science, Northern Border University, Arar, Saudi Arabia
| | - Gofarana Wilar
- Department of Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Universitas Padjadjaran, Jatinangor, 45363, Indonesia
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3
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Vohra M, Kour A, Kalia NP, Kumar M, Sharma S, Jaglan S, Kamath N, Sharma S. A comprehensive review of genomics, transcriptomics, proteomics, and metabolomic insights into the differentiation of Pseudomonas aeruginosa from the planktonic to biofilm state: A multi-omics approach. Int J Biol Macromol 2024; 257:128563. [PMID: 38070800 DOI: 10.1016/j.ijbiomac.2023.128563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 11/06/2023] [Accepted: 11/30/2023] [Indexed: 01/26/2024]
Abstract
Biofilm formation by Pseudomonas aeruginosa is primarily responsible for chronic wound and lung infections in humans. These infections are persistent owing to the biofilm's high tolerance to antimicrobials and constantly changing environmental factors. Understanding the mechanism governing biofilm formation can help to develop therapeutics explicitly directed against the molecular markers responsible for this process. After numerous years of research, many genes responsible for both in vitro and in vivo biofilm development remain unidentified. However, there is no "all in one" complete in vivo or in vitro biofilm model. Recent findings imply that the shift from planktonic bacteria to biofilms is a complicated and interrelated differentiation process. Research on the applications of omics technologies in P. aeruginosa biofilm development is ongoing, and these approaches hold great promise for expanding our knowledge of the mechanisms of biofilm formation. This review discusses the different factors that affect biofilm formation and compares P. aeruginosa biofilm formation using the omics approaches targeting essential biological macromolecules, such as DNA, RNA, Protein, and metabolome. Furthermore, we have outlined the application of currently available omics tools, such as genomics, proteomics, metabolomics, transcriptomics, and integrated multi-omics methodologies, to understand the differential gene expression (biofilm vs. planktonic bacteria) of P. aeruginosa biofilms.
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Affiliation(s)
- Mustafa Vohra
- Department of Medical Laboratory Science, Lovely Professional University, Punjab 144411, India; Department of Microbiology, Shri Vinoba Bhave Civil Hospital, Silvassa 396230, India
| | - Avleen Kour
- Department of Medical Laboratory Science, Lovely Professional University, Punjab 144411, India
| | - Nitin Pal Kalia
- Department of Biological Sciences (Pharmacology & Toxicology), National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana 500037, India
| | - Manoj Kumar
- Maternal and Child Health Program, Research Department, Sidra Medicine, Doha 122104, Qatar
| | - Sarika Sharma
- Department of Sponsored Research, Division of Research & Development, Lovely Professional University, India
| | - Sundeep Jaglan
- Fermentation & Microbial Biotechnology Division, CSIR-Indian Institute of Integrative Medicine, Jammu 180016, J&K, India
| | - Narayan Kamath
- Department of Microbiology, Shri Vinoba Bhave Civil Hospital, Silvassa 396230, India; Department of Microbiology, NAMO Medical Education and Research Institute, Silvassa 396230, India
| | - Sandeep Sharma
- Department of Medical Laboratory Science, Lovely Professional University, Punjab 144411, India.
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4
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Ramalingam S, Chandrasekar MJN, Krishnan GGN, Nanjan MJ. Plant-based Natural Products as inhibitors for Efflux Pumps to Reverse Multidrug Resistance in Staphylococcus aureus: A Mini Review. Mini Rev Med Chem 2024; 24:272-288. [PMID: 37038687 DOI: 10.2174/1389557523666230406092128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 02/09/2023] [Accepted: 02/22/2023] [Indexed: 04/12/2023]
Abstract
Wounds provide a favourable site for microbial infection. Wound infection makes the healing more complex and does not proceed in an orchestrated manner leading to the chronic wound. Clinically infected wounds require proper antimicrobial therapy. Broad-spectrum antibiotics are usually prescribed first before going to targeted therapy. The current conventional mode of therapy mainly depends on the use of antibiotics topically or systemically. Repeated and prolonged use of antibiotics, however, leads to multidrug resistance. Staphylococcus aureus is the most common multidrugresistant microorganism found in wounds. It effectively colonizes the wound and produces many toxins, thereby reducing the host immune response and causing recurrent infection, thus making the wound more complex. The overexpression of efflux pumps is one of the major reasons for the emergence of multidrug resistance. Inhibition of efflux pumps is, therefore, a potential strategy to reverse this resistance. The effective therapy to overcome this antibiotic resistance is to use combination therapy, namely the combination of an inhibitor, and a non-antibiotic compound with an antibiotic for their dual function. Many synthetic efflux pump inhibitors to treat wound infections are still under clinical trials. In this connection, several investigations have been carried out on plant-based natural products as multidrug resistance-modifying agents as they are believed to be safe, inexpensive and suitable for chronic wound infections.
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Affiliation(s)
- Shalini Ramalingam
- Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Ooty, Nilgiris, Tamil Nadu, 643001, India
| | - Moola Joghee Nanjan Chandrasekar
- School of Life Sciences, JSS Academy of Higher Education & Research (Ooty Campus), Longwood, Mysuru Road, Ooty, The Nilgiris, Tamil Nadu, 643001, India
| | - Ganesh G N Krishnan
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Ooty, Nilgiris, Tamil Nadu, 643001, India
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5
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Regulski M, Myntti MF, James GA. Anti-Biofilm Efficacy of Commonly Used Wound Care Products in In Vitro Settings. Antibiotics (Basel) 2023; 12:antibiotics12030536. [PMID: 36978402 PMCID: PMC10044339 DOI: 10.3390/antibiotics12030536] [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: 01/18/2023] [Revised: 02/24/2023] [Accepted: 03/02/2023] [Indexed: 03/30/2023] Open
Abstract
Considering the prevalence and pathogenicity of biofilms in wounds, this study was designed to evaluate the anti-biofilm capabilities of eight commercially available wound care products using established in vitro assays for biofilms. The products evaluated included dressings with multiple delivery formats for ionic silver including nanocrystalline, gelling fibers, polyurethane (PU) foam, and polymer matrix. Additionally, non-silver-based products including an extracellular polymeric substance (EPS)-dissolving antimicrobial wound gel (BDWG), a collagenase-based debriding ointment and a fish skin-based skin substitute were also evaluated. The products were evaluated on Staphylococcus aureus and Pseudomonas aeruginosa mixed-species biofilms grown using colony drip flow reactor (CDFR) and standard drip flow reactor (DFR) methodologies. Anti-biofilm efficacy was measured by viable plate counts and confocal scanning laser microscopy (CSLM). Four of the eight wound care products tested were efficacious in inhibiting growth of new biofilm when compared with untreated controls. These four products were further evaluated against mature biofilms. BDWG was the only product that achieved greater than 2-log growth reduction (5.88 and 6.58 for S. aureus and P. aeruginosa, respectively) of a mature biofilm. Evaluating both biofilm prevention and mature biofilm disruption capacity is important to a comprehensive understanding of the anti-biofilm efficacy of wound care products.
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Affiliation(s)
- Matthew Regulski
- Wound Care Institute of Ocean County, 54 Bey Lea Road, Toms River, NJ 08753, USA
| | - Matthew F Myntti
- Next Science® LLC, 10550 Deerwood Park Blvd, Suite 300, Jacksonville, FL 32256, USA
| | - Garth A James
- Center for Biofilm Engineering, Montana State University, 366 Barnard Hall, Bozeman, MT 59717, USA
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Moshynets OV, Baranovskyi TP, Iungin OS, Krikunov AA, Potochilova VV, Rudnieva KL, Potters G, Pokholenko I. Therapeutic Potential of an Azithromycin-Colistin Combination against XDR K. pneumoniae in a 3D Collagen-Based In Vitro Wound Model of a Biofilm Infection. Antibiotics (Basel) 2023; 12:antibiotics12020293. [PMID: 36830203 PMCID: PMC9952533 DOI: 10.3390/antibiotics12020293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 01/20/2023] [Accepted: 01/28/2023] [Indexed: 02/05/2023] Open
Abstract
A therapeutic combination of azithromycin (AZM) and colistin methanesulfonate (CMS) was shown to be effective against both non-PDR and PDR Klebsiella pneumoniae biofilms in vitro. These anti-biofilm effects, however, may not correlate with effects observed in standard plate assays, nor will they representative of in vivo therapeutic action. After all, biofilm-associated infection processes are also impacted by the presence of wound bed components, such as host cells or wound fluids, which can all affect the antibiotic effectiveness. Therefore, an in vitro wound model of biofilm infection which partially mimics the complex microenvironment of infected wounds was developed to investigate the therapeutic potential of an AZM-CMS combination against XDR K. pneumoniae isolates. The model consists of a 3D collagen sponge-like scaffold seeded with HEK293 cells submerged in a fluid milieu mimicking the wound bed exudate. Media that were tested were all based on different strengths of Dulbecco's modified Eagles/high glucose medium supplemented with fetal bovine serum, and/or Bacto Proteose peptone. Use of this model confirmed AZM to be a highly effective antibiofilm component, when applied alone or in combination with CMS, whereas CMS alone had little antibacterial effectiveness or even stimulated biofilm development. The wound model proposed here proves therefore, to be an effective aid in the study of drug combinations under realistic conditions.
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Affiliation(s)
- Olena V. Moshynets
- Biofilm Study Group, Department of Cell Regulatory Mechanisms, Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine, Zabolotnoho Str. 150, 03680 Kyiv, Ukraine
- Correspondence: (O.V.M.); (G.P.)
| | - Taras P. Baranovskyi
- CeMM, Research Center for Molecular Medicine of the Austrian Academy of Sciences, Lazarettgasse 14, A-1090 Vienna, Austria
| | - Olga S. Iungin
- Biofilm Study Group, Department of Cell Regulatory Mechanisms, Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine, Zabolotnoho Str. 150, 03680 Kyiv, Ukraine
- Department of Biotechnology, Leather and Fur, Faculty of Chemical and Biopharmaceutical Technologies, Kyiv National University of Technologies and Design, Nemyrovycha-Danchenka Street 2, 01011 Kyiv, Ukraine
| | - Alexey A. Krikunov
- National Amosov Institute of Cardio-Vascular Surgery Affiliated to National Academy of Medical Sciences of Ukraine, Amosov Str. 6, 02000 Kyiv, Ukraine
| | | | - Kateryna L. Rudnieva
- Kyiv Regional Clinical Hospital, Baggovutovskaya Str. 1, 04107 Kyiv, Ukraine
- Department of Microbiology, Virology and Immunology, Bogomolets National Medical University, Shevchenka Blvd. 13, 01601 Kyiv, Ukraine
| | - Geert Potters
- Antwerp Maritime Academy, Noordkasteel Oost 6, 2030 Antwerp, Belgium
- Department of Bioscience Engineering, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
- Correspondence: (O.V.M.); (G.P.)
| | - Ianina Pokholenko
- Department of Cell Regulatory Mechanisms, Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine, 150 Zabolotnoho Str., 03680 Kyiv, Ukraine
- The Polymer Chemistry & Biomaterials Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281, S4-Bis, 9000 Ghent, Belgium
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7
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Khalid A, Cookson AR, Whitworth DE, Beeton ML, Robins LI, Maddocks SE. A Synthetic Polymicrobial Community Biofilm Model Demonstrates Spatial Partitioning, Tolerance to Antimicrobial Treatment, Reduced Metabolism, and Small Colony Variants Typical of Chronic Wound Biofilms. Pathogens 2023; 12:pathogens12010118. [PMID: 36678466 PMCID: PMC9862141 DOI: 10.3390/pathogens12010118] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/06/2023] [Accepted: 01/07/2023] [Indexed: 01/12/2023] Open
Abstract
Understanding chronic wound infection is key for successful treatment and requires accurate laboratory models. We describe a modified biofilm flow device that effectively mimics the chronic wound environment, including simulated wound fluid, a collagen-based 3D biofilm matrix, and a five-species mixture of clinically relevant bacteria (Pseudomonas aeruginosa, Staphylococcus aureus, Escherichia coli, Enterococcus faecalis, and Citrobacter freundii). Mixed biofilms were cultured for between 3 and 14 days with consistent numbers of bacteria that exhibited reduced metabolic activity, which increased with a high dose of glucose. S. aureus was recovered from biofilms as a small colony variant, but as a normal colony variant if P. aeruginosa was excluded from the system. Bacteria within the biofilm did not co-aggregate but formed discrete, species-specific clusters. Biofilms demonstrated differential tolerance to the topical antimicrobials Neosporin and HOCl, consistent with protection due to the biofilm lifestyle. The characteristics exhibited within this model match those of real-world wound biofilms, reflecting the clinical scenario and yielding a powerful in vitro tool that is versatile, inexpensive, and pivotal for understanding chronic wound infection.
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Affiliation(s)
- Ammara Khalid
- Microbiology and Infection Research Group, Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff CF5 2YB, UK
| | - Alan R. Cookson
- Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth SY23 3DD, UK
| | - David E. Whitworth
- Department of Life Sciences, Aberystwyth University, Aberystwyth SY23 3DD, UK
| | - Michael L. Beeton
- Microbiology and Infection Research Group, Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff CF5 2YB, UK
| | - Lori I. Robins
- Department of Physical Sciences, University of Washington, Bothell, WA 98011-8246, USA
| | - Sarah E. Maddocks
- Microbiology and Infection Research Group, Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff CF5 2YB, UK
- Correspondence:
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8
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Development of an implantable three-dimensional model of a functional pathogenic multispecies biofilm to study infected wounds. Sci Rep 2022; 12:21846. [PMID: 36528648 PMCID: PMC9759537 DOI: 10.1038/s41598-022-25569-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 12/01/2022] [Indexed: 12/23/2022] Open
Abstract
Chronic wounds cannot heal due to impairment of regeneration, mainly caused by the persistent infection of multispecies biofilms. Still, the effects of biofilm wound infection and its interaction with the host are not fully described. We aimed to study functional biofilms in physiological conditions in vitro, and their potential effects in health and regeneration in vivo. Therefore, Pseudomonas aeruginosa, Staphylococcus aureus and Enterococcus faecalis were seeded in collagen-based scaffolds for dermal regeneration. After 24 h, scaffolds had bacterial loads depending on the initial inoculum, containing viable biofilms with antibiotic tolerance. Afterwards, scaffolds were implanted onto full skin wounds in mice, together with daily supervision and antibiotic treatment. Although all mice survived their health was affected, displaying fever and weight loss. After ten days, histomorphology of scaffolds showed high heterogeneity in samples and within groups. Wounds were strongly, mildly, or not infected according to colony forming units, and P. aeruginosa had higher identification frequency. Biofilm infection induced leucocyte infiltration and elevated interferon-γ and interleukin-10 in scaffolds, increase of size and weight of spleen and high systemic pro-calcitonin concentrations. This functional and implantable 3D biofilm model allows to study host response during infection, providing a useful tool for infected wounds therapy development.
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9
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González-Plaza JJ, Furlan C, Rijavec T, Lapanje A, Barros R, Tamayo-Ramos JA, Suarez-Diez M. Advances in experimental and computational methodologies for the study of microbial-surface interactions at different omics levels. Front Microbiol 2022; 13:1006946. [PMID: 36519168 PMCID: PMC9744117 DOI: 10.3389/fmicb.2022.1006946] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 11/02/2022] [Indexed: 08/31/2023] Open
Abstract
The study of the biological response of microbial cells interacting with natural and synthetic interfaces has acquired a new dimension with the development and constant progress of advanced omics technologies. New methods allow the isolation and analysis of nucleic acids, proteins and metabolites from complex samples, of interest in diverse research areas, such as materials sciences, biomedical sciences, forensic sciences, biotechnology and archeology, among others. The study of the bacterial recognition and response to surface contact or the diagnosis and evolution of ancient pathogens contained in archeological tissues require, in many cases, the availability of specialized methods and tools. The current review describes advances in in vitro and in silico approaches to tackle existing challenges (e.g., low-quality sample, low amount, presence of inhibitors, chelators, etc.) in the isolation of high-quality samples and in the analysis of microbial cells at genomic, transcriptomic, proteomic and metabolomic levels, when present in complex interfaces. From the experimental point of view, tailored manual and automatized methodologies, commercial and in-house developed protocols, are described. The computational level focuses on the discussion of novel tools and approaches designed to solve associated issues, such as sample contamination, low quality reads, low coverage, etc. Finally, approaches to obtain a systems level understanding of these complex interactions by integrating multi omics datasets are presented.
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Affiliation(s)
- Juan José González-Plaza
- International Research Centre in Critical Raw Materials-ICCRAM, University of Burgos, Burgos, Spain
| | - Cristina Furlan
- Laboratory of Systems and Synthetic Biology, Wageningen University and Research, Wageningen, Netherlands
| | - Tomaž Rijavec
- Department of Environmental Sciences, Jožef Stefan Institute, Ljubljana, Slovenia
| | - Aleš Lapanje
- Department of Environmental Sciences, Jožef Stefan Institute, Ljubljana, Slovenia
| | - Rocío Barros
- International Research Centre in Critical Raw Materials-ICCRAM, University of Burgos, Burgos, Spain
| | | | - Maria Suarez-Diez
- Laboratory of Systems and Synthetic Biology, Wageningen University and Research, Wageningen, Netherlands
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10
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Srichaiyapol O, Maddocks SE, Thammawithan S, Daduang S, Klaynongsruang S, Patramanon R. TA-AgNPs/Alginate Hydrogel and Its Potential Application as a Promising Antibiofilm Material against Polymicrobial Wound Biofilms Using a Unique Biofilm Flow Model. Microorganisms 2022; 10:2279. [PMID: 36422349 PMCID: PMC9692730 DOI: 10.3390/microorganisms10112279] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/09/2022] [Accepted: 11/12/2022] [Indexed: 07/30/2023] Open
Abstract
The presence of biofilm within a chronic wound may delay the healing process. Thus, control of biofilm formation and providing bactericidal effect are crucial factors for wound healing management. Alginate-based nanocomposite hydrogels have been suggested as dressing materials for wound treatment, which are employed as a biocompatible matrix. Therefore, in this study, we aimed to develop a biocompatible antimicrobial wound dressing containing AgNPs and demonstrate its efficacy against polymicrobial wound biofilms by using a biofilm flow device to simulate a chronic infected, exuding wound and specific wound environment. The results from agar well diffusion, the Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) assays showed that TA-AgNPs exhibited antibacterial activity against wound pathogens. Additionally, the Minimum Biofilm Eradication Concentration assay (MBEC) demonstrated it could impair biofilm formation. Importantly, our TA-AgNPs/Alginate hydrogel clearly showed antibacterial activities against Streptococcus pyogenes, Staphylococcus aureus and Pseudomonas aeruginosa. Furthermore, we used the biofilm flow device to test the topical antimicrobial hydrogel against a three-species biofilm. We found that TA-AgNPs/Alginate hydrogel significantly showed a 3-4 log reduction in bacterial numbers when applied with multiple doses at 24 h intervals, and was especially effective against the chronic wound pathogen P. aeruginosa. This work highlighted that the TA-AgNPs/Alginate hydrogel is a promising material for treating complex wound biofilms.
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Affiliation(s)
- Oranee Srichaiyapol
- Department of Biochemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Sarah E. Maddocks
- Microbiology and Infection Research Group, Cardiff School of Health Sciences, Cardiff Metropolitan University, Cardiff CF5 2YB, UK
| | - Saengrawee Thammawithan
- Department of Biochemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Sakda Daduang
- Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen 40002, Thailand
- Protein and Proteomics Research Center for Commercial and Industrial Purposes (ProCCI), Khon Kaen University, Khon Kaen 40002, Thailand
| | - Sompong Klaynongsruang
- Program Management Unit for Human Resources and Institutional Development, Research and Innovation (PMU-B), Bangkok 10330, Thailand
| | - Rina Patramanon
- Department of Biochemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
- Protein and Proteomics Research Center for Commercial and Industrial Purposes (ProCCI), Khon Kaen University, Khon Kaen 40002, Thailand
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11
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Esin S, Kaya E, Maisetta G, Romanelli M, Batoni G. The antibacterial and antibiofilm activity of Granudacyn in vitro in a 3D collagen wound infection model. J Wound Care 2022; 31:908-922. [DOI: 10.12968/jowc.2022.31.11.908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Objective: It is widely agreed that infection and the formation of biofilms play a major role in increasing inflammation and delaying wound healing. The aim of this study was to evaluate, in vitro, the antimicrobial activity of the wound irrigation solution, Granudacyn (Mölnlycke Health Care AB, Sweden) against planktonic bacteria and mature biofilms of clinically relevant bacterial species. Method: Quantitative evaluation of bacterial numbers and confocal and/or scanning electron microscopy were used to evaluate the wound irrigation solution's antimicrobial/antibiofilm activity in standard laboratory conditions as well as in a three-dimensional (3D) collagen wound infection model. Results: The wound irrigation solution exhibited a rapid and strong antibacterial activity against both Gram-positive and Gram-negative strains isolated from infected wounds in planktonic form, with a reduction in bacterial number of >4 Logs after as little as one minute of treatment. The wound irrigation solution also exerted an evident activity against preformed biofilms of Pseudomonas aeruginosa and Staphylococcus aureus (>3 Log and >1 Log reduction in colony forming unit number, respectively, after 15 minutes of incubation). Although the wound irrigation solution was partially inhibited in the presence of simulated wound fluid, it maintained a marked antibiofilm activity in in vivo-like conditions (ie. in a 3D collagen wound infection model) with a strong killing and a mild debridement effect, which was superior to standard saline. Conclusion: The results obtained in this study suggest that although the wound irrigation solution used might be partially inhibited by wound exudate, it has the potential to effectively kill wound infecting planktonic as well as biofilm bacteria.
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Affiliation(s)
- Semih Esin
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | - Esingül Kaya
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | - Giuseppantonio Maisetta
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | - Marco Romanelli
- Division of Dermatology, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Giovanna Batoni
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
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12
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Multi-Strain and -Species Investigation of Volatile Metabolites Emitted from Planktonic and Biofilm Candida Cultures. Metabolites 2022; 12:metabo12050432. [PMID: 35629935 PMCID: PMC9146923 DOI: 10.3390/metabo12050432] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 05/02/2022] [Accepted: 05/06/2022] [Indexed: 02/04/2023] Open
Abstract
Candida parapsiliosis is a prevalent neonatal pathogen that attains its virulence through its strain-specific ability to form biofilms. The use of volatilomics, the profiling of volatile metabolites from microbes is a non-invasive, simple way to identify and classify microbes; it has shown great potential for pathogen identification. Although C. parapsiliosis is one of the most common clinical fungal pathogens, its volatilome has never been characterised. In this study, planktonic volatilomes of ten clinical strains of C. parapsilosis were analysed, along with a single strain of Candida albicans. Headspace-solid-phase microextraction coupled with gas chromatography-mass spectrometry were employed to analyse the samples. Species-, strain-, and media- influences on the fungal volatilomes were investigated. Twenty-four unique metabolites from the examined Candida spp. (22 from C. albicans; 18 from C. parapsilosis) were included in this study. Chemical classes detected across the samples included alcohols, fatty acid esters, acetates, thiols, sesquiterpenes, and nitrogen-containing compounds. C. albicans volatilomes were most clearly discriminated from C. parapsilosis based on the detection of unique sesquiterpene compounds. The effect of biofilm formation on the C. parapsilosis volatilomes was investigated for the first time by comparing volatilomes of a biofilm-positive strain and a biofilm-negative strain over time (0–48 h) using a novel sampling approach. Volatilomic shifts in the profiles of alcohols, ketones, acids, and acetates were observed specifically in the biofilm-forming samples and attributed to biofilm maturation. This study highlights species-specificity of Candida volatilomes, and also marks the clinical potential for volatilomics for non-invasively detecting fungal pathogens. Additionally, the range of biofilm-specificity across microbial volatilomes is potentially far-reaching, and therefore characterising these volatilomic changes in pathogenic fungal and bacterial biofilms could lead to novel opportunities for detecting severe infections early.
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13
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Slade EA, Thorn RMS, Young AE, Reynolds DM. Real-time detection of volatile metabolites enabling species-level discrimination of bacterial biofilms associated with wound infection. J Appl Microbiol 2022; 132:1558-1572. [PMID: 34617369 PMCID: PMC9298000 DOI: 10.1111/jam.15313] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 07/19/2021] [Accepted: 09/13/2021] [Indexed: 01/25/2023]
Abstract
AIMS The main aim of this study was to investigate the real-time detection of volatile metabolites for the species-level discrimination of pathogens associated with clinically relevant wound infection, when grown in a collagen wound biofilm model. METHODS AND RESULTS This work shows that Staphylococcus aureus, Pseudomonas aeruginosa and Streptococcus pyogenes produce a multitude of volatile compounds when grown as biofilms in a collagen-based biofilm model. The real-time detection of these complex volatile profiles using selected ion flow tube mass spectrometry and the use of multivariate statistical analysis on the resulting data can be used to successfully differentiate between the pathogens studied. CONCLUSIONS The range of bacterial volatile compounds detected between the species studied vary and are distinct. Discrimination between bacterial species using real-time detection of volatile metabolites and multivariate statistical analysis was successfully demonstrated. SIGNIFICANCE AND IMPACT OF THE STUDY Development of rapid point-of-care diagnostics for wound infection would improve diagnosis and patient care. Such technological approaches would also facilitate the appropriate use of antimicrobials, minimizing the emergence of antimicrobial resistance. This study further develops the use of volatile metabolite detection as a new diagnostic approach for wound infection.
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Affiliation(s)
- Elisabeth A. Slade
- Centre for Research in BiosciencesUniversity of the West of EnglandBristolUK
| | - Robin M. S. Thorn
- Centre for Research in BiosciencesUniversity of the West of EnglandBristolUK
| | - Amber E. Young
- Bristol Centre for Surgical ResearchPopulation Health SciencesBristol Medical SchoolUniversity of BristolBristolUK
| | - Darren M. Reynolds
- Centre for Research in BiosciencesUniversity of the West of EnglandBristolUK
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14
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Greenman J, Gajda I, You J, Mendis BA, Obata O, Pasternak G, Ieropoulos I. Microbial fuel cells and their electrified biofilms. Biofilm 2021; 3:100057. [PMID: 34729468 PMCID: PMC8543385 DOI: 10.1016/j.bioflm.2021.100057] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 07/29/2021] [Accepted: 08/19/2021] [Indexed: 11/06/2022] Open
Abstract
Bioelectrochemical systems (BES) represent a wide range of different biofilm-based bioreactors that includes microbial fuel cells (MFCs), microbial electrolysis cells (MECs) and microbial desalination cells (MDCs). The first described bioelectrical bioreactor is the Microbial Fuel Cell and with the exception of MDCs, it is the only type of BES that actually produces harvestable amounts of electricity, rather than requiring an electrical input to function. For these reasons, this review article, with previously unpublished supporting data, focusses primarily on MFCs. Of relevance is the architecture of these bioreactors, the type of membrane they employ (if any) for separating the chambers along with the size, as well as the geometry and material composition of the electrodes which support biofilms. Finally, the structure, properties and growth rate of the microbial biofilms colonising anodic electrodes, are of critical importance for rendering these devices, functional living 'engines' for a wide range of applications.
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Affiliation(s)
- John Greenman
- Bristol BioEnergy Centre, BRL, University of the West of England, Frenchay Campus, BS16 1QY, UK
| | - Iwona Gajda
- Bristol BioEnergy Centre, BRL, University of the West of England, Frenchay Campus, BS16 1QY, UK
| | - Jiseon You
- Bristol BioEnergy Centre, BRL, University of the West of England, Frenchay Campus, BS16 1QY, UK
| | - Buddhi Arjuna Mendis
- Bristol BioEnergy Centre, BRL, University of the West of England, Frenchay Campus, BS16 1QY, UK
| | - Oluwatosin Obata
- Bristol BioEnergy Centre, BRL, University of the West of England, Frenchay Campus, BS16 1QY, UK
| | | | - Ioannis Ieropoulos
- Bristol BioEnergy Centre, BRL, University of the West of England, Frenchay Campus, BS16 1QY, UK
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15
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Kadam S, Madhusoodhanan V, Dhekane R, Bhide D, Ugale R, Tikhole U, Kaushik KS. Milieu matters: An in vitro wound milieu to recapitulate key features of, and probe new insights into, mixed-species bacterial biofilms. Biofilm 2021; 3:100047. [PMID: 33912828 PMCID: PMC8065265 DOI: 10.1016/j.bioflm.2021.100047] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 03/29/2021] [Accepted: 03/29/2021] [Indexed: 12/20/2022] Open
Abstract
Bacterial biofilms are a major cause of delayed wound healing. Consequently, the study of wound biofilms, particularly in host-relevant conditions, has gained importance. Most in vitro studies employ refined laboratory media to study biofilms, representing conditions that are not relevant to the infection state. To mimic the wound milieu, in vitro biofilm studies often incorporate serum or plasma in growth conditions, or employ clot or matrix-based biofilm models. While incorporating serum or plasma alone is a minimalistic approach, the more complex in vitro wound models are technically demanding, and poorly compatible with standard biofilm assays. Based on previous reports of clinical wound fluid composition, we have developed an in vitro wound milieu (IVWM) that includes, in addition to serum (to recapitulate wound fluid), matrix elements and biochemical factors. With Luria-Bertani broth and Fetal Bovine Serum (FBS) for comparison, the IVWM was used to study planktonic growth, biofilm features, and interspecies interactions, of common wound pathogens, Staphylococcus aureus and Pseudomonas aeruginosa. We demonstrate that the IVWM recapitulates widely reported in vivo biofilm features such as biomass formation, metabolic activity, increased antibiotic tolerance, 3D structure, and interspecies interactions for monospecies and mixed-species biofilms. Further, the IVWM is simple to formulate, uses laboratory-grade components, and is compatible with standard biofilm assays. Given this, it holds potential as a tractable approach to study wound biofilms under host-relevant conditions.
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Affiliation(s)
- Snehal Kadam
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune, India
| | - Vandana Madhusoodhanan
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune, India
| | - Radhika Dhekane
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune, India
| | - Devyani Bhide
- MES Abasaheb Garware College of Arts and Science, Pune, India
| | - Rutuja Ugale
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune, India
| | - Utkarsha Tikhole
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune, India
| | - Karishma S. Kaushik
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune, India
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16
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Kaya S, Yilmaz DE, Akmayan I, Egri O, Arasoglu T, Derman S. Caffeic Acid Phenethyl Ester Loaded Electrospun Nanofibers for Wound Dressing Application. J Pharm Sci 2021; 111:734-742. [PMID: 34600940 DOI: 10.1016/j.xphs.2021.09.041] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 09/25/2021] [Accepted: 09/26/2021] [Indexed: 01/25/2023]
Abstract
Electrospinning is an advantageous method with a wide usage area, which enables the production of materials consisting of nano-thickness fibers. In this study, caffeic acid phenethyl ester (CAPE) molecule was loaded onto the poly(lactic-co-glycolic acid) (PLGA) nanofibers and obtained nanofibers were physicochemically and biologically investigated for the first time in the literature. The existence of CAPE molecules, loaded on PLGA membranes by dropping and spraying methods, was evaluated by a comparative investigation of Fourier-transform infrared (FTIR) spectra and X-Ray diffraction (XRD) patterns. Fiber morphology of the membranes was investigated by scanning electron microscope (SEM). CAPE release and swelling behaviors of the membranes were studied in vitro. The radical scavenging activity of CAPE-loaded wound dressing materials was determined by using an antioxidant assay. The antimicrobial properties of PLGA and CAPE-loaded PLGA membranes were evaluated against S. aureus, P. aeruginosa and C. albicans strains by the time-kill method. The biocompatibility study of the obtained CAPE-loaded fibers conducted on human fibroblast cell line and wound healing promoting effect of the fibers was investigated in vitro scratch assay. The results show that CAPE-loaded PLGA membranes are highly antimicrobial against all strains used in the experiment. Additionally, the results show that they are biocompatible and have wound healing properties on human fibroblasts.
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Affiliation(s)
- Seçil Kaya
- Yildiz Technical University, Faculty of Chemical and Metallurgical Engineering, Department of Bioengineering, Istanbul, Turkey
| | - Duygu Elif Yilmaz
- Charité - Universitätsmedizin Berlin, Department of Nephrology and Medical Intensive Care, Berlin, Germany
| | - Ilkgül Akmayan
- Yildiz Technical University, Faculty of Arts and Sciences, Department of Molecular Biology and Genetics, Istanbul, Turkey
| | - Ozlem Egri
- Tokat Gaziosmanpasa University, Faculty of Engineering and Natural Sciences, Department of Bioengineering, Tokat, Turkey
| | - Tülin Arasoglu
- Yildiz Technical University, Faculty of Arts and Sciences, Department of Molecular Biology and Genetics, Istanbul, Turkey
| | - Serap Derman
- Yildiz Technical University, Faculty of Chemical and Metallurgical Engineering, Department of Bioengineering, Istanbul, Turkey.
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17
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Shukla SK, Sharma AK, Gupta V, Kalonia A, Shaw P. Challenges with Wound Infection Models in Drug Development. Curr Drug Targets 2021; 21:1301-1312. [PMID: 32116189 DOI: 10.2174/1389450121666200302093312] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 02/06/2020] [Accepted: 02/06/2020] [Indexed: 01/05/2023]
Abstract
Wound research is an evolving science trying to unfold the complex untold mechanisms behind the wound healing cascade. In particular, interest is growing regarding the role of microorganisms in both acute and chronic wound healing. Microbial burden plays an important role in the persistence of chronic wounds, ultimately resulting in delayed wound healing. It is therefore important for clinicians to understand the evolution of infection science and its various etiologies. Therefore, to understand the role of bacterial biofilm in chronic wound pathogenesis, various in vitro and in vivo models are required to investigate biofilms in wound-like settings. Infection models should be refined comprising an important signet of biofilms. These models are eminent for translational research to obtain data for designing an improved wound care formulation. However, all the existing models possess limitations and do not fit properly in the model frame for developing wound care agents. Among various impediments, one of the major drawbacks of such models is that the wound they possess does not mimic the wound a human develops. Therefore, a novel wound infection model is required which can imitate the human wounds. This review article mainly discusses various in vitro and in vivo models showing microbial colonization, their advantages and challenges. Apart from these models, there are also present ex vivo wound infection models, but this review mainly focused on various in vitro and in vivo models available for studying wound infection in controlled conditions. This information might be useful in designing an ideal wound infection model for developing an effective wound healing formulation.
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Affiliation(s)
- Sandeep K Shukla
- Institute of Nuclear Medicine & Allied Sciences, Defence Research and Development Organization, SK Mazumdar Marg, Timarpur, Delhi-110054, India
| | - Ajay K Sharma
- Institute of Nuclear Medicine & Allied Sciences, Defence Research and Development Organization, SK Mazumdar Marg, Timarpur, Delhi-110054, India
| | - Vanya Gupta
- Graphic Era deemed to be University, Dehradun, India
| | - Aman Kalonia
- Institute of Nuclear Medicine & Allied Sciences, Defence Research and Development Organization, SK Mazumdar Marg, Timarpur, Delhi-110054, India
| | - Priyanka Shaw
- Institute of Nuclear Medicine & Allied Sciences, Defence Research and Development Organization, SK Mazumdar Marg, Timarpur, Delhi-110054, India
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18
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Jaulin N, Idrus RH, Saim A, Wan-Ibrahim WI, Abdul-Rahman PS, Lokanathan Y. Airway Fibroblast Secretory Products Enhance Cell Migration. CURR PROTEOMICS 2021. [DOI: 10.2174/1570164618666210823094105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
The nasal fibroblast secretome, which includes various cytokines, chemokines, and growth factors, promotes cell migration. Currently, the proteomics of airway fibroblast (AF) conditioned medium (AFCM) are being actively studied.
Objective:
This study was aimed at profiling and identifying the AF secreted proteins that can enhance wound healing of the airway epithelium and predict the potential pathway involved.
Methods:
Airway epithelial cells (AECs) and AFs were isolated from redundant human nasal turbinate and cultured. AFCM was collected by culturing the AFs either with serum-free airway epithelium basal medium (AECM) or with serum-free F12:DMEM (FDCM). For evaluating cell migration, the AECs were supplemented with airway epithelium medium and defined keratinocyte medium (1:1; AEDK; control), or with AEDK supplemented with 20% AECM or 20% FDCM. The mass spectrometry sample was prepared by protein precipitation, followed by gel electrophoresis and in-gel digestion.
Results :
AECM promoted better cell migration compared to the FDCM and the control medium. Bioinformatics analysis identified a total of 121, and 92 proteins from AECM and FDCM, respectively: 109 and 82 were identified as secreted proteins, respectively. STRING® analysis predicted that 23 proteins from the AECM and 16 proteins from the FDCM are involved in wound healing.
Conclusion:
Conditioned medium promotes wound healing by enhancing cell migration, and we successfully identified various secretory proteins in a conditioned medium that play important roles in wound healing.
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Affiliation(s)
- Nundisa Jaulin
- Centre for Tissue Engineering and Regenerative Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Ruszymah Hj Idrus
- Centre for Tissue Engineering and Regenerative Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Aminuddin Saim
- Ear, Nose and Throat Consultant Clinic, KPJ Ampang Puteri Specialist Hospital, Ampang, Malaysia
| | - Wan Izlina Wan-Ibrahim
- Department of Oral and Craniofacial Sciences, Faculty of Dentistry, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Puteri Shafinaz Abdul-Rahman
- Medical Biotechnology Laboratory, Central Research Laboratories, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Yogeswaran Lokanathan
- Centre for Tissue Engineering and Regenerative Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
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19
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Rahman MU, Fleming DF, Sinha I, Rumbaugh KP, Gordon VD, Christopher GF. Effect of collagen and EPS components on the viscoelasticity of Pseudomonas aeruginosa biofilms. SOFT MATTER 2021; 17:6225-6237. [PMID: 34109345 PMCID: PMC8283923 DOI: 10.1039/d1sm00463h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Pseudomonas aeruginosa is an opportunistic pathogen that causes thousands of deaths every year in part due to its ability to form biofilms composed of bacteria embedded in a matrix of self-secreted extracellular polysaccharides (EPS), e-DNA, and proteins. In chronic wounds, biofilms are exposed to the host extracellular matrix, of which collagen is a major component. How bacterial EPS interacts with host collagen and whether this interaction affects biofilm viscoelasticity is not well understood. Since physical disruption of biofilms is often used in their removal, knowledge of collagen's effects on biofilm viscoelasticity may enable new treatment strategies that are better tuned to biofilms growing in host environments. In this work, biofilms are grown in the presence of different concentrations of collagen that mimic in vivo conditions. In order to explore collagen's interaction with EPS, nine strains of P. aeruginosa with different patterns of EPS production were used to grow biofilms. Particle tracking microrheology was used to characterize the mechanical development of biofilms over two days. Collagen is found to decrease biofilm compliance and increase relative elasticity regardless of the EPS present in the system. However, this effect is minimized when biofilms overproduce EPS. Collagen appears to become a de facto component of the EPS, through binding to bacteria or physical entanglement.
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Affiliation(s)
- Minhaz Ur Rahman
- Department of Mechanical Engineering, Whitacre College of Engineering, Texas Tech University, Lubbock, TX, USA.
| | - Derek F Fleming
- Department of Surgery, Texas Tech Health Sciences, Lubbock, TX, USA
| | - Indranil Sinha
- Department of Mechanical Engineering, Whitacre College of Engineering, Texas Tech University, Lubbock, TX, USA.
| | | | - Vernita D Gordon
- Department of Physics, Center for Nonlinear Dynamics, Interdisciplinary Life Sciences Graduate Programs, LaMontagne Center for Infectious Disease, The University of Texas at Austin, Austin, TX, USA
| | - Gordon F Christopher
- Department of Mechanical Engineering, Whitacre College of Engineering, Texas Tech University, Lubbock, TX, USA.
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20
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Chen X, Lorenzen J, Xu Y, Jonikaite M, Thaarup IC, Bjarnsholt T, Kirketerp-Møller K, Thomsen TR. A novel chronic wound biofilm model sustaining coexistence of Pseudomonas aeruginosa and Staphylococcus aureus suitable for testing of antibiofilm effect of antimicrobial solutions and wound dressings. Wound Repair Regen 2021; 29:820-829. [PMID: 34105845 PMCID: PMC8453894 DOI: 10.1111/wrr.12944] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 05/10/2021] [Accepted: 05/23/2021] [Indexed: 01/20/2023]
Abstract
Chronic wounds are a large burden to patients and healthcare systems. Biofilm infections in chronic wounds are crucial factors leading to non‐healing of wounds. It is important to study biofilm in wounds and to develop effective interventions against wound biofilm. This study presents a novel in vitro biofilm model mimicking infected chronic wounds. The novel layered chronic wound biofilm model uses woundlike media and includes both Pseudomonas aeruginosa and Staphylococcus aureus, which have been identified as the most important pathogens in wounds. The model sustains their coexistence for at least 96 h. Microscopy of the model revealed microbial growth in non‐surface attached microcolonies as previously observed in vivo. The model was used to determine log10‐reduction for the use of an antimicrobial solution and antimicrobial dressings (containing silver or honey) showing moderate‐to‐low antibiofilm effect, which indicates better concordance with the observed clinical performance of this type of treatment than other widely used standard tests.
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Affiliation(s)
- Xiaofeng Chen
- Center for Microbial Communities, Aalborg University, Aalborg East, Denmark
| | - Jan Lorenzen
- Environmental Technology, Danish Technology Institute, Aarhus, Denmark
| | - Yijuan Xu
- Center for Microbial Communities, Aalborg University, Aalborg East, Denmark.,Environmental Technology, Danish Technology Institute, Aarhus, Denmark
| | - Monika Jonikaite
- Center for Microbial Communities, Aalborg University, Aalborg East, Denmark
| | | | - Thomas Bjarnsholt
- Costerton Biofilm Center, University of Copenhagen, Copenhagen, Denmark.,Department of Clinical Microbiology, Copenhagen University Hospital, Copenhagen, Denmark
| | - Klaus Kirketerp-Møller
- Department of Dermatology and Wounds, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark
| | - Trine Rolighed Thomsen
- Center for Microbial Communities, Aalborg University, Aalborg East, Denmark.,Environmental Technology, Danish Technology Institute, Aarhus, Denmark
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21
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Seneviratne CJ, Suriyanarayanan T, Widyarman AS, Lee LS, Lau M, Ching J, Delaney C, Ramage G. Multi-omics tools for studying microbial biofilms: current perspectives and future directions. Crit Rev Microbiol 2020; 46:759-778. [PMID: 33030973 DOI: 10.1080/1040841x.2020.1828817] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The advent of omics technologies has greatly improved our understanding of microbial biology, particularly in the last two decades. The field of microbial biofilms is, however, relatively new, consolidated in the 1980s. The morphogenic switching by microbes from planktonic to biofilm phenotype confers numerous survival advantages such as resistance to desiccation, antibiotics, biocides, ultraviolet radiation, and host immune responses, thereby complicating treatment strategies for pathogenic microorganisms. Hence, understanding the mechanisms governing the biofilm phenotype can result in efficient treatment strategies directed specifically against molecular markers mediating this process. The application of omics technologies for studying microbial biofilms is relatively less explored and holds great promise in furthering our understanding of biofilm biology. In this review, we provide an overview of the application of omics tools such as transcriptomics, proteomics, and metabolomics as well as multi-omics approaches for studying microbial biofilms in the current literature. We also highlight how the use of omics tools directed at various stages of the biological information flow, from genes to metabolites, can be integrated via multi-omics platforms to provide a holistic view of biofilm biology. Following this, we propose a future artificial intelligence-based multi-omics platform that can predict the pathways associated with different biofilm phenotypes.
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Affiliation(s)
- Chaminda J Seneviratne
- Singapore Oral Microbiomics Initiative (SOMI), National Dental Research Institute Singapore, National Dental Centre, Singapore, Singapore.,Duke NUS Medical School, Singapore, Singapore
| | - Tanujaa Suriyanarayanan
- Singapore Oral Microbiomics Initiative (SOMI), National Dental Research Institute Singapore, National Dental Centre, Singapore, Singapore.,Duke NUS Medical School, Singapore, Singapore
| | - Armelia Sari Widyarman
- Department of Microbiology, Faculty of Dentistry, Trisakti University, Grogol, West Jakarta, Indonesia
| | - Lye Siang Lee
- Duke-NUS Medical School, Metabolomics Lab, Cardiovascular and Metabolic Disorders, Singapore, Singapore
| | - Matthew Lau
- Singapore Oral Microbiomics Initiative (SOMI), National Dental Research Institute Singapore, National Dental Centre, Singapore, Singapore
| | - Jianhong Ching
- Duke-NUS Medical School, Metabolomics Lab, Cardiovascular and Metabolic Disorders, Singapore, Singapore
| | - Christopher Delaney
- School of Medicine, Dentistry & Nursing, Glasgow Dental Hospital & School, University of Glasgow, Glasgow, UK
| | - Gordon Ramage
- School of Medicine, Dentistry & Nursing, Glasgow Dental Hospital & School, University of Glasgow, Glasgow, UK
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22
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Greenman J, Hewett K, Saad S. Discovery, development and exploitation of steady-state biofilms. J Breath Res 2020; 14:044001. [PMID: 33021218 DOI: 10.1088/1752-7163/abb765] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Early in vitro biofilm models go back even beyond the invention of the word 'biofilm'. In the dental field, biofilms were simply known as dental plaque and many of the first in vitro models were termed 'artificial mouth microcosm plaques'. The purpose of this review is to highlight important elements of research from over the years regarding in vitro biofilm models, including data from our own laboratories. This helps us to interpret the models and point the way to the future development of biofilm testing. Many hypotheses regarding biofilm phenomena, particularly ecology, metabolism and physiology of volatile sulphur compounds (VSCs) and volatile organic compound (VOC) production could potentially be supported or disproved. In this way, the methods we use for screening biologically active agents including inhibitors, biocides and antimicrobial compounds in general can be improved. Hopefully, any lessons learnt in the past may be of value for the future. In this review, we focus around the need for growth rate controlled long-term biofilms; being continuously monitored using recent technical advances in bioluminescence, selective real-time electrodes, pH electrodes and continuous on-line analysis of the gas phase (both qualitatively and quantitatively). These features allow for accurate determination of growth rate and/or metabolic rate as well as pave the way towards automated assays and fine control of metabolism; impossible to achieve according to conventional biofilm theory. We also attempt to address the questions; can biofilm systems be improved to maintain long term 'real' or 'true' steady states over weeks or months, or are we limited to quasi-steady state systems for a limited period of time.
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Affiliation(s)
- John Greenman
- Department of Applied Sciences, University of the West of England, BS16 1QY, United Kingdom. Bristol BioEnergy Centre, Bristol Robotics Laboratory, University of the West of England, BS16 1QY, United Kingdom
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23
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Dhar Y, Han Y. Current developments in biofilm treatments: Wound and implant infections. ENGINEERED REGENERATION 2020. [DOI: 10.1016/j.engreg.2020.07.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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