1
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Murphy C, Banasiewicz T, Duteille F, Ferrando PM, Jerez González JA, Koullias G, Long Z, Nasur R, Salazar Trujillo MA, Bassetto F, Dunk AM, Iafrati M, Jawień A, Matsumura H, O'Connor L, Sanchez V, Wu J. A proactive healing strategy for tackling biofilm-based surgical site complications: Wound Hygiene Surgical. J Wound Care 2024; 33:S1-S30. [PMID: 38787336 DOI: 10.12968/jowc.2024.33.sup5c.s1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Affiliation(s)
- Chris Murphy
- Vascular Nurse Specialist, Ottawa Hospital Limb Preservation Centre, Ottawa, Canada
| | - Tomasz Banasiewicz
- Head of Department of General Endocrine Surgery and Gastrointestinal Oncology, Poznań University of Medical Sciences, Poznań, Poland
| | | | - Pietro Maria Ferrando
- Consultant Plastic and Oncoplastic Surgeon, Plastic Surgery Department and Breast Unit, City of Health and Science, University Hospital of Turin, Italy
| | | | - George Koullias
- Associate Professor of Surgery, Division of Vascular & Endovascular Surgery, Stony Brook University Hospital & Stony Brook Southampton Hospital, USA
| | - Zhang Long
- Chief Surgeon, Associate Professor, Mentor of Master in Surgery, Executive Deputy Director of Wound Healing Center, Department of Interventional Radiology and Vascular Surgery, Peking University Third Hospital, Beijing, China
| | - Reem Nasur
- Consultant Obstetrician, Gynaecologist and Head of Women's Health, Blackpool Teaching Hospitals NHS Foundation Trust, UK
| | - Marco Antonio Salazar Trujillo
- Plastic and Reconstructive Surgeon, Consultant in Advanced Wound Management, Scientific Director of Plastic, Aesthetic and Laser Surgery, Renovarte, Colombia
| | - Franco Bassetto
- Full Professor of Plastic, Reconstructive and Aesthetic Surgery, Chief of the Clinic of Plastic and Reconstructive Surgery, Padova University Hospital, Padova, Italy
| | - Ann Marie Dunk
- RN MN(research) PhD(c) Ghent University, Belgium, Clinical Nurse Consultant, Tissue Viability Unit, Canberra Hospital, Australian Capital Territory, Australia
| | - Mark Iafrati
- Director of the Vanderbilt Wound Center and Professor of Vascular Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Arkadiusz Jawień
- Head of the Department of Vascular Surgery and Angiology, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland
| | - Hajime Matsumura
- Professor, Chair of the Department of Plastic Surgery and Director of the General Informatics Division, Tokyo Medical University, Tokyo, Japan
| | - Louise O'Connor
- Independent Tissue Viability Nurse Consultant, Manchester, UK
| | - Violeta Sanchez
- Specialist Nurse in Complex Wounds and Pressure Ulcers, Son Llàtzer Hospital, Palma de Mallorca, Spain
| | - Jun Wu
- Professor, Director, Department of Burn and Plastic Surgery, First Affiliated Hospital, Shenzhen University, Shenzhen, China
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2
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Żuchowska K, Filipiak W. Modern approaches for detection of volatile organic compounds in metabolic studies focusing on pathogenic bacteria: Current state of the art. J Pharm Anal 2024; 14:100898. [PMID: 38634063 PMCID: PMC11022102 DOI: 10.1016/j.jpha.2023.11.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 10/03/2023] [Accepted: 11/15/2023] [Indexed: 04/19/2024] Open
Abstract
Pathogenic microorganisms produce numerous metabolites, including volatile organic compounds (VOCs). Monitoring these metabolites in biological matrices (e.g., urine, blood, or breath) can reveal the presence of specific microorganisms, enabling the early diagnosis of infections and the timely implementation of targeted therapy. However, complex matrices only contain trace levels of VOCs, and their constituent components can hinder determination of these compounds. Therefore, modern analytical techniques enabling the non-invasive identification and precise quantification of microbial VOCs are needed. In this paper, we discuss bacterial VOC analysis under in vitro conditions, in animal models and disease diagnosis in humans, including techniques for offline and online analysis in clinical settings. We also consider the advantages and limitations of novel microextraction techniques used to prepare biological samples for VOC analysis, in addition to reviewing current clinical studies on bacterial volatilomes that address inter-species interactions, the kinetics of VOC metabolism, and species- and drug-resistance specificity.
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Affiliation(s)
- Karolina Żuchowska
- Department of Pharmacodynamics and Molecular Pharmacology, Faculty of Pharmacy, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, 85-089 Bydgoszcz, Poland
| | - Wojciech Filipiak
- Department of Pharmacodynamics and Molecular Pharmacology, Faculty of Pharmacy, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, 85-089 Bydgoszcz, Poland
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3
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Fitzgerald S, Holland L, Ahmed W, Piechulla B, Fowler SJ, Morrin A. Volatilomes of human infection. Anal Bioanal Chem 2024; 416:37-53. [PMID: 37843549 PMCID: PMC10758372 DOI: 10.1007/s00216-023-04986-z] [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: 07/31/2023] [Revised: 09/22/2023] [Accepted: 10/03/2023] [Indexed: 10/17/2023]
Abstract
The human volatilome comprises a vast mixture of volatile emissions produced by the human body and its microbiomes. Following infection, the human volatilome undergoes significant shifts, and presents a unique medium for non-invasive biomarker discovery. In this review, we examine how the onset of infection impacts the production of volatile metabolites that reflects dysbiosis by pathogenic microbes. We describe key analytical workflows applied across both microbial and clinical volatilomics and emphasize the value in linking microbial studies to clinical investigations to robustly elucidate the metabolic species and pathways leading to the observed volatile signatures. We review the current state of the art across microbial and clinical volatilomics, outlining common objectives and successes of microbial-clinical volatilomic workflows. Finally, we propose key challenges, as well as our perspectives on emerging opportunities for developing clinically useful and targeted workflows that could significantly enhance and expedite current practices in infection diagnosis and monitoring.
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Affiliation(s)
- Shane Fitzgerald
- SFI Insight Centre for Data Analytics, School of Chemical Sciences, National Centre for Sensor Research, Dublin City University, Dublin, Ireland
| | - Linda Holland
- School of Biotechnology, Dublin City University, Dublin, Ireland
| | - Waqar Ahmed
- Division of Immunology, Immunity to Infection and Respiratory Medicine, School of Biological Sciences, The University of Manchester, Manchester, UK
| | - Birgit Piechulla
- Institute of Biological Sciences, University of Rostock, Rostock, Germany
| | - Stephen J Fowler
- Division of Immunology, Immunity to Infection and Respiratory Medicine, School of Biological Sciences, The University of Manchester, Manchester, UK
- Respiratory Medicine, Manchester Academic Health Science Centre, Manchester University NHS Foundation Trust, Manchester, UK
| | - Aoife Morrin
- SFI Insight Centre for Data Analytics, School of Chemical Sciences, National Centre for Sensor Research, Dublin City University, Dublin, Ireland.
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4
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Wächter J, Vestweber PK, Planz V, Windbergs M. Unravelling host-pathogen interactions by biofilm infected human wound models. Biofilm 2023; 6:100164. [PMID: 38025836 PMCID: PMC10656240 DOI: 10.1016/j.bioflm.2023.100164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 10/19/2023] [Accepted: 10/20/2023] [Indexed: 12/01/2023] Open
Abstract
Approximately 80 % of persistent wound infections are affected by the presence of bacterial biofilms, resulting in a severe clinical challenge associated with prolonged healing periods, increased morbidity, and high healthcare costs. Unfortunately, in vitro models for wound infection research almost exclusively focus on early infection stages with planktonic bacteria. In this study, we present a new approach to emulate biofilm-infected human wounds by three-dimensional human in vitro systems. For this purpose, a matured biofilm consisting of the clinical key wound pathogen Pseudomonas aeruginosa was pre-cultivated on electrospun scaffolds allowing for non-destructive transfer of the matured biofilm to human in vitro wound models. We infected tissue-engineered human in vitro skin models as well as ex vivo human skin explants with the biofilm and analyzed structural tissue characteristics, biofilm growth behavior, and biofilm-tissue interactions. The structural development of biofilms in close proximity to the tissue, resulting in high bacterial burden and in vivo-like morphology, confirmed a manifest wound infection on all tested wound models, validating their applicability for general investigations of biofilm growth and structure. The extent of bacterial colonization of the wound bed, as well as the subsequent changes in molecular composition of skin tissue, were inherently linked to the characteristics of the underlying wound models including their viability and origin. Notably, the immune response observed in viable ex vivo and in vitro models was consistent with previous in vivo reports. While ex vivo models offered greater complexity and closer similarity to the in vivo conditions, in vitro models consistently demonstrated higher reproducibility. As a consequence, when focusing on direct biofilm-skin interactions, the viability of the wound models as well as their advantages and limitations should be aligned to the particular research question of future studies. Altogether, the novel model allows for a systematic investigation of host-pathogen interactions of bacterial biofilms and human wound tissue, also paving the way for development and predictive testing of novel therapeutics to combat biofilm-infected wounds.
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Affiliation(s)
| | | | - Viktoria Planz
- Institute of Pharmaceutical Technology, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Maike Windbergs
- Institute of Pharmaceutical Technology, Goethe University Frankfurt, Frankfurt am Main, Germany
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5
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Why Do These Yeasts Smell So Good? Volatile Organic Compounds (VOCs) Produced by Malassezia Species in the Exponential and Stationary Growth Phases. Molecules 2023; 28:molecules28062620. [PMID: 36985592 PMCID: PMC10056951 DOI: 10.3390/molecules28062620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 02/23/2023] [Accepted: 03/04/2023] [Indexed: 03/18/2023] Open
Abstract
Malassezia synthesizes and releases volatile organic compounds (VOCs), small molecules that allow them to carry out interaction processes. These lipid-dependent yeasts belong to the human skin mycobiota and are related to dermatological diseases. However, knowledge about VOC production and its function is lacking. This study aimed to determine the volatile profiles of Malassezia globosa, Malassezia restricta, and Malassezia sympodialis in the exponential and stationary growth phases. The compounds were separated and characterized in each growth phase through headspace solid-phase microextraction (HS-SPME) and gas chromatography–mass spectrometry (GC–MS). We found a total of 54 compounds, 40 annotated. Most of the compounds identified belong to alcohols and polyols, fatty alcohols, alkanes, and unsaturated aliphatic hydrocarbons. Unsupervised and supervised statistical multivariate analyses demonstrated that the volatile profiles of Malassezia differed between species and growth phases, with M. globosa being the species with the highest quantity of VOCs. Some Malassezia volatiles, such as butan-1-ol, 2-methylbutan-1-ol, 3-methylbutan-1-ol, and 2-methylpropan-1-ol, associated with biological interactions were also detected. All three species show at least one unique compound, suggesting a unique metabolism. The ecological functions of the compounds detected in each species and growth phase remain to be studied. They could interact with other microorganisms or be an important clue in understanding the pathogenic role of these yeasts.
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6
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Öztürk FY, Darcan C, Kariptaş E. The Determination, Monitoring, Molecular Mechanisms and Formation of Biofilm in E. coli. Braz J Microbiol 2023; 54:259-277. [PMID: 36577889 PMCID: PMC9943865 DOI: 10.1007/s42770-022-00895-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Accepted: 12/16/2022] [Indexed: 12/30/2022] Open
Abstract
Biofilms are cell assemblies embedded in an exopolysaccharide matrix formed by microorganisms of a single or many different species. This matrix in which they are embedded protects the bacteria from external influences and antimicrobial effects. The biofilm structure that microorganisms form to protect themselves from harsh environmental conditions and survive is found in nature in many different environments. These environments where biofilm formation occurs have in common that they are in contact with fluids. The gene expression of bacteria in complex biofilm differs from that of bacteria in the planktonic state. The differences in biofilm cell expression are one of the effects of community life. Means of quorum sensing, bacteria can act in coordination with each other. At the same time, while biofilm formation provides many benefits to bacteria, it has positive and negative effects in many different areas. Depending on where they occur, biofilms can cause serious health problems, contamination risks, corrosion, and heat and efficiency losses. However, they can also be used in water treatment plants, bioremediation, and energy production with microbial fuel cells. In this review, the basic steps of biofilm formation and biofilm regulation in the model organism Escherichia coli were discussed. Finally, the methods by which biofilm formation can be detected and monitored were briefly discussed.
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Affiliation(s)
- Fırat Yavuz Öztürk
- Department of Molecular Biology and Genetic, Faculty of Arts and Science, Bilecik Seyh Edebali University, Bilecik, Turkey.
| | - Cihan Darcan
- Department of Molecular Biology and Genetic, Faculty of Arts and Science, Bilecik Seyh Edebali University, Bilecik, Turkey
| | - Ergin Kariptaş
- Department of Medical Microbiology, Faculty of Medicine, Samsun University, Samsun, Turkey
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7
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Jenkins CL, Bean HD. Current Limitations of Staph Infection Diagnostics, and the Role for VOCs in Achieving Culture-Independent Detection. Pathogens 2023; 12:pathogens12020181. [PMID: 36839453 PMCID: PMC9963134 DOI: 10.3390/pathogens12020181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 01/19/2023] [Accepted: 01/20/2023] [Indexed: 01/26/2023] Open
Abstract
Staphylococci are broadly adaptable and their ability to grow in unique environments has been widely established, but the most common and clinically relevant staphylococcal niche is the skin and mucous membranes of mammals and birds. S. aureus causes severe infections in mammalian tissues and organs, with high morbidities, mortalities, and treatment costs. S. epidermidis is an important human commensal but is also capable of deadly infections. Gold-standard diagnostic methods for staph infections currently rely upon retrieval and characterization of the infectious agent through various culture-based methods. Yet, obtaining a viable bacterial sample for in vitro identification of infection etiology remains a significant barrier in clinical diagnostics. The development of volatile organic compound (VOC) profiles for the detection and identification of pathogens is an area of intensive research, with significant efforts toward establishing breath tests for infections. This review describes the limitations of existing infection diagnostics, reviews the principles and advantages of VOC-based diagnostics, summarizes the analytical tools for VOC discovery and clinical detection, and highlights examples of how VOC biomarkers have been applied to diagnosing human and animal staph infections.
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Affiliation(s)
- Carrie L. Jenkins
- School of Life Sciences, Arizona State University, Tempe, AZ 85287, USA
- Center for Evolution and Medicine, Arizona State University, Tempe, AZ 85287, USA
| | - Heather D. Bean
- School of Life Sciences, Arizona State University, Tempe, AZ 85287, USA
- Center for Fundamental and Applied Microbiomics, The Biodesign Institute, Tempe, AZ 85287, USA
- Correspondence:
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8
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The biofilm life cycle: expanding the conceptual model of biofilm formation. Nat Rev Microbiol 2022; 20:608-620. [PMID: 35922483 PMCID: PMC9841534 DOI: 10.1038/s41579-022-00767-0] [Citation(s) in RCA: 303] [Impact Index Per Article: 151.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/21/2022] [Indexed: 01/18/2023]
Abstract
Bacterial biofilms are often defined as communities of surface-attached bacteria and are typically depicted with a classic mushroom-shaped structure characteristic of Pseudomonas aeruginosa. However, it has become evident that this is not how all biofilms develop, especially in vivo, in clinical and industrial settings, and in the environment, where biofilms often are observed as non-surface-attached aggregates. In this Review, we describe the origin of the current five-step biofilm development model and why it fails to capture many aspects of bacterial biofilm physiology. We aim to present a simplistic developmental model for biofilm formation that is flexible enough to include all the diverse scenarios and microenvironments where biofilms are formed. With this new expanded, inclusive model, we hereby introduce a common platform for developing an understanding of biofilms and anti-biofilm strategies that can be tailored to the microenvironment under investigation.
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9
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Short WD, Olutoye OO, Padon BW, Parikh UM, Colchado D, Vangapandu H, Shams S, Chi T, Jung JP, Balaji S. Advances in non-invasive biosensing measures to monitor wound healing progression. Front Bioeng Biotechnol 2022; 10:952198. [PMID: 36213059 PMCID: PMC9539744 DOI: 10.3389/fbioe.2022.952198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 07/12/2022] [Indexed: 01/09/2023] Open
Abstract
Impaired wound healing is a significant financial and medical burden. The synthesis and deposition of extracellular matrix (ECM) in a new wound is a dynamic process that is constantly changing and adapting to the biochemical and biomechanical signaling from the extracellular microenvironments of the wound. This drives either a regenerative or fibrotic and scar-forming healing outcome. Disruptions in ECM deposition, structure, and composition lead to impaired healing in diseased states, such as in diabetes. Valid measures of the principal determinants of successful ECM deposition and wound healing include lack of bacterial contamination, good tissue perfusion, and reduced mechanical injury and strain. These measures are used by wound-care providers to intervene upon the healing wound to steer healing toward a more functional phenotype with improved structural integrity and healing outcomes and to prevent adverse wound developments. In this review, we discuss bioengineering advances in 1) non-invasive detection of biologic and physiologic factors of the healing wound, 2) visualizing and modeling the ECM, and 3) computational tools that efficiently evaluate the complex data acquired from the wounds based on basic science, preclinical, translational and clinical studies, that would allow us to prognosticate healing outcomes and intervene effectively. We focus on bioelectronics and biologic interfaces of the sensors and actuators for real time biosensing and actuation of the tissues. We also discuss high-resolution, advanced imaging techniques, which go beyond traditional confocal and fluorescence microscopy to visualize microscopic details of the composition of the wound matrix, linearity of collagen, and live tracking of components within the wound microenvironment. Computational modeling of the wound matrix, including partial differential equation datasets as well as machine learning models that can serve as powerful tools for physicians to guide their decision-making process are discussed.
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Affiliation(s)
- Walker D. Short
- Laboratory for Regenerative Tissue Repair, Division of Pediatric Surgery, Department of Surgery, Texas Children’s Hospital and Baylor College of Medicine, Houston, TX, United States
| | - Oluyinka O. Olutoye
- Laboratory for Regenerative Tissue Repair, Division of Pediatric Surgery, Department of Surgery, Texas Children’s Hospital and Baylor College of Medicine, Houston, TX, United States
| | - Benjamin W. Padon
- Laboratory for Regenerative Tissue Repair, Division of Pediatric Surgery, Department of Surgery, Texas Children’s Hospital and Baylor College of Medicine, Houston, TX, United States
| | - Umang M. Parikh
- Laboratory for Regenerative Tissue Repair, Division of Pediatric Surgery, Department of Surgery, Texas Children’s Hospital and Baylor College of Medicine, Houston, TX, United States
| | - Daniel Colchado
- Laboratory for Regenerative Tissue Repair, Division of Pediatric Surgery, Department of Surgery, Texas Children’s Hospital and Baylor College of Medicine, Houston, TX, United States
| | - Hima Vangapandu
- Laboratory for Regenerative Tissue Repair, Division of Pediatric Surgery, Department of Surgery, Texas Children’s Hospital and Baylor College of Medicine, Houston, TX, United States
| | - Shayan Shams
- Department of Applied Data Science, San Jose State University, San Jose, CA, United States
- School of Biomedical Informatics, University of Texas Health Science Center, Houston, TX, United States
| | - Taiyun Chi
- Department of Electrical and Computer Engineering, Rice University, Houston, TX, United States
| | - Jangwook P. Jung
- Department of Biological Engineering, Louisiana State University, Baton Rouge, LA, United States
| | - Swathi Balaji
- Laboratory for Regenerative Tissue Repair, Division of Pediatric Surgery, Department of Surgery, Texas Children’s Hospital and Baylor College of Medicine, Houston, TX, United States
- *Correspondence: Swathi Balaji,
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10
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The Human Skin Volatolome: A Systematic Review of Untargeted Mass Spectrometry Analysis. Metabolites 2022; 12:metabo12090824. [PMID: 36144228 PMCID: PMC9504915 DOI: 10.3390/metabo12090824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/27/2022] [Accepted: 08/28/2022] [Indexed: 11/16/2022] Open
Abstract
The analysis of volatile organic compounds (VOCs) can provide important clinical information (entirely non-invasively); however, the exact extent to which VOCs from human skin can be signatures of health and disease is unknown. This systematic review summarises the published literature concerning the methodology, application, and volatile profiles of skin VOC studies. An online literature search was conducted in accordance with the preferred reporting items for systematic reviews and meta-analysis, to identify human skin VOC studies using untargeted mass spectrometry (MS) methods. The principal outcome was chemically verified VOCs detected from the skin. Each VOC was cross-referenced using the CAS number against the Human Metabolome and KEGG databases to evaluate biological origins. A total of 29 studies identified 822 skin VOCs from 935 participants. Skin VOCs were commonly sampled from the hand (n = 9) or forearm (n = 7) using an absorbent patch (n = 15) with analysis by gas chromatography MS (n = 23). Twenty-two studies profiled the skin VOCs of healthy subjects, demonstrating a volatolome consisting of aldehydes (18%), carboxylic acids (12%), alkanes (12%), fatty alcohols (9%), ketones (7%), benzenes and derivatives (6%), alkenes (2%), and menthane monoterpenoids (2%). Of the VOCs identified, 13% had putative endogenous origins, 46% had tentative exogenous origins, and 40% were metabolites from mixed metabolic pathways. This review has comprehensively profiled the human skin volatolome, demonstrating the presence of a distinct VOC signature of healthy skin, which can be used as a reference for future researchers seeking to unlock the clinical potential of skin volatolomics. As significant proportions of identified VOCs have putative exogenous origins, strategies to minimise their presence through methodological refinements and identifying confounding compounds are discussed.
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11
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Gobin M, Proust R, Lack S, Duciel L, Des Courtils C, Pauthe E, Gand A, Seyer D. A Combination of the Natural Molecules Gallic Acid and Carvacrol Eradicates P. aeruginosa and S. aureus Mature Biofilms. Int J Mol Sci 2022; 23:ijms23137118. [PMID: 35806123 PMCID: PMC9266711 DOI: 10.3390/ijms23137118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 06/22/2022] [Accepted: 06/23/2022] [Indexed: 01/18/2023] Open
Abstract
Wound infection, especially the development of bacterial biofilms, delays wound healing and is a major public health concern. Bacteria in biofilms are more tolerant to antimicrobial agents, and new treatments to eradicate mature biofilms are needed. Combining antimicrobial molecules with different mechanisms of action is an attractive strategy to tackle the heterogeneous nature of microbial communities in biofilms. This study focused on three molecules of natural origin: gallic acid (G), carvacrol (K) and curcumin (Q). Their abilities, individually or in combination, to eradicate biofilms were quantified on mono- and dual-species mature biofilms of Pseudomonas aeruginosa and Staphylococcus aureus, the strains most commonly found in infected wounds. G presented biofilm eradicating activity on P. aeruginosa, whereas K had biofilm eradicating activity on S. aureus and P. aeruginosa. Q had no potent biofilm eradicating activity. The combination of G and K increased the effects previously observed on P. aeruginosa biofilm and led to complete eradication of S. aureus biofilm. This combination was also efficient in eradicating a dual-species biofilm of S. aureus and P. aeruginosa. This work demonstrates that K and G used in combination have a strong and synergistic eradicating activity on both mono- and dual-species mature biofilms of S. aureus and P. aeruginosa and may therefore represent an efficient alternative for the treatment of biofilms in wounds.
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Affiliation(s)
- Maxime Gobin
- ERRMECe Laboratory, 1 rue Descartes, CY Cergy Paris University, 95031 Neuville sur Oise, France; (M.G.); (E.P.); (A.G.)
| | - Richard Proust
- Les Laboratoires BROTHIER, 41 Rue de Neuilly, 92735 Nanterre, France; (R.P.); (S.L.); (L.D.); (C.D.C.)
| | - Stéphane Lack
- Les Laboratoires BROTHIER, 41 Rue de Neuilly, 92735 Nanterre, France; (R.P.); (S.L.); (L.D.); (C.D.C.)
| | - Laura Duciel
- Les Laboratoires BROTHIER, 41 Rue de Neuilly, 92735 Nanterre, France; (R.P.); (S.L.); (L.D.); (C.D.C.)
| | - Céline Des Courtils
- Les Laboratoires BROTHIER, 41 Rue de Neuilly, 92735 Nanterre, France; (R.P.); (S.L.); (L.D.); (C.D.C.)
| | - Emmanuel Pauthe
- ERRMECe Laboratory, 1 rue Descartes, CY Cergy Paris University, 95031 Neuville sur Oise, France; (M.G.); (E.P.); (A.G.)
| | - Adeline Gand
- ERRMECe Laboratory, 1 rue Descartes, CY Cergy Paris University, 95031 Neuville sur Oise, France; (M.G.); (E.P.); (A.G.)
| | - Damien Seyer
- ERRMECe Laboratory, 1 rue Descartes, CY Cergy Paris University, 95031 Neuville sur Oise, France; (M.G.); (E.P.); (A.G.)
- Correspondence:
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12
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Rahman MU, Fleming DF, Wang L, Rumbaugh KP, Gordon VD, Christopher GF. Microrheology of Pseudomonas aeruginosa biofilms grown in wound beds. NPJ Biofilms Microbiomes 2022; 8:49. [PMID: 35705574 PMCID: PMC9200728 DOI: 10.1038/s41522-022-00311-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 05/13/2022] [Indexed: 11/13/2022] Open
Abstract
A new technique was used to measure the viscoelasticity of in vivo Pseudomonas aeruginosa biofilms. This was done through ex vivo microrheology measurements of in vivo biofilms excised from mouse wound beds. To our knowledge, this is the first time that the mechanics of in vivo biofilms have been measured. In vivo results are then compared to typical in vitro measurements. Biofilms grown in vivo are more relatively elastic than those grown in a wound-like medium in vitro but exhibited similar compliance. Using various genetically mutated P. aeruginosa strains, it is observed that the contributions of the exopolysaccharides Pel, Psl, and alginate to biofilm viscoelasticity were different for the biofilms grown in vitro and in vivo. In vitro experiments with collagen containing medium suggest this likely arises from the incorporation of host material, most notably collagen, into the matrix of the biofilm when it is grown in vivo. Taken together with earlier studies that examined the in vitro effects of collagen on mechanical properties, we conclude that collagen may, in some cases, be the dominant contributor to biofilm viscoelasticity in vivo.
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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 University Health Sciences, Lubbock, TX, USA
| | - Liyun Wang
- 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
| | - Kendra P Rumbaugh
- Department of Surgery, Texas Tech University Health Sciences, 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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13
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Weigelt MA, Lev-Tov HA, Tomic-Canic M, Lee WD, Williams R, Strasfeld D, Kirsner RS, Herman IM. Advanced Wound Diagnostics: Toward Transforming Wound Care into Precision Medicine. Adv Wound Care (New Rochelle) 2022; 11:330-359. [PMID: 34128387 DOI: 10.1089/wound.2020.1319] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Significance: Nonhealing wounds are an ever-growing global pandemic, with mortality rates and management costs exceeding many common cancers. Although our understanding of the molecular and cellular factors driving wound healing continues to grow, standards for diagnosing and evaluating wounds remain largely subjective and experiential, whereas therapeutic strategies fail to consistently achieve closure and clinicians are challenged to deliver individualized care protocols. There is a need to apply precision medicine practices to wound care by developing evidence-based approaches, which are predictive, prescriptive, and personalized. Recent Advances: Recent developments in "advanced" wound diagnostics, namely biomarkers (proteases, acute phase reactants, volatile emissions, and more) and imaging systems (ultrasound, autofluorescence, spectral imaging, and optical coherence tomography), have begun to revolutionize our understanding of the molecular wound landscape and usher in a modern age of therapeutic strategies. Herein, biomarkers and imaging systems with the greatest evidence to support their potential clinical utility are reviewed. Critical Issues: Although many potential biomarkers have been identified and several imaging systems have been or are being developed, more high-quality randomized controlled trials are necessary to elucidate the currently questionable role that these tools are playing in altering healing dynamics or predicting wound closure within the clinical setting. Future Directions: The literature supports the need for the development of effective point-of-care wound assessment tools, such as a platform diagnostic array that is capable of measuring multiple biomarkers at once. These, along with advances in telemedicine, synthetic biology, and "smart" wearables, will pave the way for the transformation of wound care into a precision medicine. Clinical Trial Registration number: NCT03148977.
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Affiliation(s)
- Maximillian A. Weigelt
- Dr. Phillip Frost Department of Dermatology & Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Hadar A. Lev-Tov
- Dr. Phillip Frost Department of Dermatology & Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Marjana Tomic-Canic
- Dr. Phillip Frost Department of Dermatology & Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - W. David Lee
- Precision Healing, Inc., Newton, Massachusetts, USA
| | | | | | - Robert S. Kirsner
- Dr. Phillip Frost Department of Dermatology & Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Ira M. Herman
- Precision Healing, Inc., Newton, Massachusetts, USA
- Graduate School of Biomedical Sciences, Tufts University School of Medicine, Boston, Massachusetts, USA
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14
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Ahmadian Z, Gheybi H, Adeli M. Efficient wound healing by antibacterial property: Advances and trends of hydrogels, hydrogel-metal NP composites and photothermal therapy platforms. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.103458] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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15
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Volatile Organic Compounds in the Early Diagnosis of Non-healing Surgical Wounds: A Systematic Review. World J Surg 2022; 46:1669-1677. [DOI: 10.1007/s00268-022-06548-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/13/2022] [Indexed: 11/27/2022]
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16
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Ndhlovu GON, Dube FS, Moonsamy RT, Mankahla A, Hlela C, Levin ME, Lunjani N, Shittu AO, Abdulgader SM. Skin and nasal colonization of coagulase-negative staphylococci are associated with atopic dermatitis among South African toddlers. PLoS One 2022; 17:e0265326. [PMID: 35298533 PMCID: PMC8929619 DOI: 10.1371/journal.pone.0265326] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Accepted: 02/28/2022] [Indexed: 11/19/2022] Open
Abstract
Background
Skin colonization with coagulase-negative staphylococci (CoNS) is generally beneficial, but recent investigations suggest its association with flares and atopic dermatitis (AD) severity. However, this relationship remains unclear.
Objective
To assess patterns of staphylococcal colonization and biofilm formation in toddlers with and without AD from rural and urban South African settings.
Methods
We conducted a cross-sectional study of AD-affected and non-atopic AmaXhosa toddlers from rural Umtata and urban Cape Town, South Africa. CoNS isolates were recovered from lesional, nonlesional skin samples and the anterior nares of participants. Identification of the staphylococci was achieved by MALDI-TOF mass spectrometry. The microtiter plate assay assessed in-vitro biofilm formation.
Results
CoNS and S. aureus commonly co-colonized nonlesional skin among cases (urban: 24% vs. 3%, p = 0.037 and rural 21% vs. 6%, p<0.001), and anterior nares in urban cases (24% vs. 0%, p = 0.002) than the control group. S. capitis colonization on nonlesional skin and anterior nares was positively associated with more severe disease in rural (48.3±10.8 vs. 39.7±11.5, P = 0.045) and urban cases (74.9±10.3 vs. 38.4±13, P = 0.004), respectively. Biofilm formation was similar between cases and controls, independent of rural-urban living.
Conclusion
CoNS colonization is associated with AD and disease severity and may be implicated in AD exacerbations. Studies are needed to understand their underlying pathological contribution in AD pathogenesis.
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Affiliation(s)
- Gillian O. N. Ndhlovu
- Department of Molecular and Cell Biology, Faculty of Science, University of Cape Town, Cape Town, South Africa
- Institute of Infectious Disease & Molecular Medicine, University of Cape Town, Cape Town, South Africa
- * E-mail:
| | - Felix S. Dube
- Department of Molecular and Cell Biology, Faculty of Science, University of Cape Town, Cape Town, South Africa
- Institute of Infectious Disease & Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Rasalika T. Moonsamy
- Department of Molecular and Cell Biology, Faculty of Science, University of Cape Town, Cape Town, South Africa
- Institute of Infectious Disease & Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Avumile Mankahla
- Department of Medicine and Pharmacology, Division of Dermatology, Walter Sisulu University, Umtata, South Africa
| | - Carol Hlela
- Department of Paediatric, Division of Paediatric Allergy, University of Cape Town, Cape Town, South Africa
| | - Michael E. Levin
- Department of Paediatric, Division of Paediatric Allergy, University of Cape Town, Cape Town, South Africa
| | - Nonhlanhla Lunjani
- Department of Paediatric, Division of Paediatric Allergy, University of Cape Town, Cape Town, South Africa
| | - Adebayo O. Shittu
- Department of Microbiology, Obafemi Awolowo University, Ile-Ife, Osun State, Nigeria
- Institute of Medical Microbiology, University Hospital Münster, Münster, Germany
| | - Shima M. Abdulgader
- Department of Biomedical Sciences, Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, Tygerberg, South Africa
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17
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Weldick PJ, Wang A, Halbus AF, Paunov VN. Emerging nanotechnologies for targeting antimicrobial resistance. NANOSCALE 2022; 14:4018-4041. [PMID: 35234774 DOI: 10.1039/d1nr08157h] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Antimicrobial resistance is a leading cause of mortality worldwide. Without newly approved antibiotics and antifungals being brought to the market, resistance is being developed to the ones currently available to clinicians. The reason is the applied evolutionary pressure to bacterial and fungal species due to the wide overuse of common antibiotics and antifungals in clinical practice and agriculture. Biofilms harbour antimicrobial-resistant subpopulations, which make their antimicrobial treatment even more challenging. Nanoparticle-based technologies have recently been shown to successfully overcome antimicrobial resistance in both planktonic and biofilms phenotypes. This results from the combination of novel nanomaterial research and classic antimicrobial therapies which promise to deliver a whole new generation of high-performance active nanocarrier systems. This review discusses the latest developments of promising nanotechnologies with applications against resistant pathogens and evaluates their potential and feasibility for use in novel antimicrobial therapies.
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Affiliation(s)
- Paul J Weldick
- Department of Chemistry and Biochemistry, University of Hull, Hull, HU6 7RX, UK
| | - Anheng Wang
- Department of Chemistry and Biochemistry, University of Hull, Hull, HU6 7RX, UK
| | - Ahmed F Halbus
- Department of Chemistry, College of Science, University of Babylon, Hilla, Iraq
| | - Vesselin N Paunov
- Department of Chemistry, Nazarbayev University, Kabanbay Baryr Ave. 53, Nur-sultan city, 010000, Kazakhstan.
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18
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Krishnan M, Choi J, Jang A, Yoon YK, Kim Y. Antiseptic 9-Meric Peptide with Potency against Carbapenem-Resistant Acinetobacter baumannii Infection. Int J Mol Sci 2021; 22:12520. [PMID: 34830401 PMCID: PMC8621208 DOI: 10.3390/ijms222212520] [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: 10/17/2021] [Revised: 11/17/2021] [Accepted: 11/17/2021] [Indexed: 11/18/2022] Open
Abstract
Carbapenem-resistant A. baumannii (CRAB) infection can cause acute host reactions that lead to high-fatality sepsis, making it important to develop new therapeutic options. Previously, we developed a short 9-meric peptide, Pro9-3D, with significant antibacterial and cytotoxic effects. In this study, we attempted to produce safer peptide antibiotics against CRAB by reversing the parent sequence to generate R-Pro9-3 and R-Pro9-3D. Among the tested peptides, R-Pro9-3D had the most rapid and effective antibacterial activity against Gram-negative bacteria, particularly clinical CRAB isolates. Analyses of antimicrobial mechanisms based on lipopolysaccharide (LPS)-neutralization, LPS binding, and membrane depolarization, as well as SEM ultrastructural investigations, revealed that R-Pro9-3D binds strongly to LPS and impairs the membrane integrity of CRAB by effectively permeabilizing its outer membrane. R-Pro9-3D was also less cytotoxic and had better proteolytic stability than Pro9-3D and killed biofilm forming CRAB. As an LPS-neutralizing peptide, R-Pro9-3D effectively reduced LPS-induced pro-inflammatory cytokine levels in RAW 264.7 cells. The antiseptic abilities of R-Pro9-3D were also investigated using a mouse model of CRAB-induced sepsis, which revealed that R-Pro9-3D reduced multiple organ damage and attenuated systemic infection by acting as an antibacterial and immunosuppressive agent. Thus, R-Pro9-3D displays potential as a novel antiseptic peptide for treating Gram-negative CRAB infections.
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Affiliation(s)
- Manigandan Krishnan
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea; (M.K.); (J.C.); (A.J.)
| | - Joonhyeok Choi
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea; (M.K.); (J.C.); (A.J.)
| | - Ahjin Jang
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea; (M.K.); (J.C.); (A.J.)
| | - Young Kyung Yoon
- Department of Internal Medicine, Division of Infectious Diseases, College of Medicine, Korea University Anam Hospital, Korea University, Seoul 02841, Korea;
| | - Yangmee Kim
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea; (M.K.); (J.C.); (A.J.)
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19
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Choi J, Jang A, Yoon YK, Kim Y. Development of Novel Peptides for the Antimicrobial Combination Therapy against Carbapenem-Resistant Acinetobacter baumannii Infection. Pharmaceutics 2021; 13:pharmaceutics13111800. [PMID: 34834215 PMCID: PMC8619914 DOI: 10.3390/pharmaceutics13111800] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/20/2021] [Accepted: 10/25/2021] [Indexed: 11/30/2022] Open
Abstract
Carbapenem-resistant Acinetobacter baumannii (CRAB) infection has a high mortality rate, making the development of novel effective antibiotic therapeutic strategies highly critical. Antimicrobial peptides can outperform conventional antibiotics regarding drug resistance and broad-spectrum activity. PapMA, an 18-residue hybrid peptide, containing N-terminal residues of papiliocin and magainin 2, has previously demonstrated potent antibacterial activity. In this study, PapMA analogs were designed by substituting Ala15 or Phe18 with Ala, Phe, and Trp. PapMA-3 with Trp18 showed the highest bacterial selectivity against CRAB, alongside low cytotoxicity. Biophysical studies revealed that PapMA-3 permeabilizes CRAB membrane via strong binding to LPS. To reduce toxicity via reduced antibiotic doses, while preventing the emergence of multi-drug resistant bacteria, the efficacy of PapMA-3 in combination with six selected antibiotics was evaluated against clinical CRAB isolates (C1–C5). At 25% of the minimum inhibition concentration, PapMA-3 partially depolarized the CRAB membrane and caused sufficient morphological changes, facilitating the entry of antibiotics into the bacterial cell. Combining PapMA-3 with rifampin significantly and synergistically inhibited CRAB C4 (FICI = 0.13). Meanwhile, combining PapMA-3 with vancomycin or erythromycin, both potent against Gram-positive bacteria, demonstrated remarkable synergistic antibiofilm activity against Gram-negative CRAB. This study could aid in the development of combination therapeutic approaches against CRAB.
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Affiliation(s)
- Joonhyeok Choi
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea; (J.C.); (A.J.)
| | - Ahjin Jang
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea; (J.C.); (A.J.)
| | - Young Kyung Yoon
- Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul 02841, Korea;
| | - Yangmee Kim
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea; (J.C.); (A.J.)
- Correspondence: ; Tel.: +822-450-3421; Fax: +822-447-5987
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20
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Fitzgerald S, Holland L, Morrin A. An Investigation of Stability and Species and Strain-Level Specificity in Bacterial Volatilomes. Front Microbiol 2021; 12:693075. [PMID: 34721314 PMCID: PMC8549763 DOI: 10.3389/fmicb.2021.693075] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 09/23/2021] [Indexed: 12/26/2022] Open
Abstract
Microbial volatilomics is a rapidly growing field of study and has shown great potential for applications in food, farming, and clinical sectors in the future. Due to the varying experimental methods and growth conditions employed in microbial volatilomic studies as well as strain-dependent volatilomic differences, there is limited knowledge regarding the stability of microbial volatilomes. Consequently, cross-study comparisons and validation of results and data can be challenging. In this study, we investigated the stability of the volatilomes of multiple strains of Staphylococcus aureus, Pseudomonas aeruginosa and Escherichia coli across three frequently used nutrient-rich growth media. Volatilomic stability was assessed based on media-, time- and strain-dependent variation across the examined bacterial volatilomes. Strain-level specificity of the observed volatilomes of E. coli and P. aeruginosa strains was further investigated by comparing the emission of selected compounds at varying stages of cell growth. Headspace solid phase microextraction (HS-SPME) sampling coupled with gas chromatography mass spectrometry (GC-MS) was used to analyze the volatilome of each strain. The whole volatilomes of the examined strains demonstrate a high degree of stability across the three examined growth media. At the compound-level, media dependent differences were observed particularly when comparing the volatilomes obtained in glucose-containing brain heart infusion (BHI) and tryptone soy broth (TSB) growth media with the volatilomes obtained in glucose-free Lysogeny broth (LB) media. These glucose-dependent volatilomic differences were primarily seen in the emission of primary metabolites such as alcohols, ketones, and acids. Strain-level differences in the emission of specific compounds in E. coli and P. aeruginosa samples were also observed across the media. These strain-level volatilomic differences were also observed across varying phases of growth of each strain, therefore confirming that these strains had varying core and accessory volatilomes. Our results demonstrate that, at the species-level, the examined bacteria have a core volatilome that exhibits a high-degree of stability across frequently-used growth media. Media-dependent differences in microbial volatilomes offer valuable insights into identifying the cellular origin of individual metabolites. The observed differences in the core and accessory volatilomes of the examined strains illustrate the complexity of microbial volatilomics as a study while also highlighting the need for more strain-level investigations to ultimately elucidate the whole volatilomic capabilities of microbial species in the future.
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Affiliation(s)
- Shane Fitzgerald
- School of Chemical Sciences, National Center for Sensor Research, SFI Insight Centre for Data Analytics, Dublin City University, Dublin, Ireland
| | - Linda Holland
- School of Biotechnology, Dublin City University, Dublin, Ireland
| | - Aoife Morrin
- School of Chemical Sciences, National Center for Sensor Research, SFI Insight Centre for Data Analytics, Dublin City University, Dublin, Ireland
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21
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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 2021; 132:1558-1572. [PMID: 34617369 PMCID: PMC9298000 DOI: 10.1111/jam.15313] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [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 Biosciences, University of the West of England, Bristol, UK
| | - Robin M S Thorn
- Centre for Research in Biosciences, University of the West of England, Bristol, UK
| | - Amber E Young
- Bristol Centre for Surgical Research, Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
| | - Darren M Reynolds
- Centre for Research in Biosciences, University of the West of England, Bristol, UK
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22
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Biofilm and Equine Limb Wounds. Animals (Basel) 2021; 11:ani11102825. [PMID: 34679846 PMCID: PMC8532864 DOI: 10.3390/ani11102825] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 09/14/2021] [Accepted: 09/23/2021] [Indexed: 01/01/2023] Open
Abstract
Simple Summary Delayed wound healing commonly occurs in limb wounds of horses. These equine limb wounds share many similarities with chronic wounds in humans and one of them seems to be the presence of biofilm, even though equine wound biofilm research is just emerging. Biofilms are aggregates of bacteria, and within these aggregates, the bacteria are protected from both antimicrobial substances and the immune response of the host. Biofilm infections in wounds often delay healing and are impossible to detect with routine diagnostics. However, if suspected, aggressive treatment is needed and includes physically removing biofilm and unhealthy tissue from the wound during debridement and immediately applying antimicrobial compounds to kill any biofilm or bacteria not removed during debridement. Abstract In chronic wounds in humans, biofilm formation and wound chronicity are linked, as biofilms contribute to chronic inflammation and delayed healing. Biofilms are aggregates of bacteria, and living as biofilms is the default mode of bacterial life; within these aggregates, the bacteria are protected from both antimicrobial substances and the immune response of the host. In horses, delayed healing is more commonly seen in limb wounds than body wounds. Chronic inflammation and hypoxia are the main characteristics of delayed wound healing in equine limbs, and biofilms might also contribute to this healing pattern in horses. However, biofilm formation in equine wounds has been studied to a very limited degree. Biofilms have been detected in equine traumatic wounds, and recent experimental models have shown that biofilms protract the healing of equine limb wounds. Detection of biofilms within wounds necessitates advanced techniques that are not available in routine diagnostic yet. However, infections with biofilm should be suspected in equine limb wounds not healing as expected, as they are in human wounds. Treatment should be based on repeated debridement and application of topical antimicrobial therapy.
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23
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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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24
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Su Y, McCarthy A, Wong SL, Hollins RR, Wang G, Xie J. Simultaneous Delivery of Multiple Antimicrobial Agents by Biphasic Scaffolds for Effective Treatment of Wound Biofilms. Adv Healthc Mater 2021; 10:e2100135. [PMID: 33887126 PMCID: PMC8222186 DOI: 10.1002/adhm.202100135] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 03/21/2021] [Indexed: 12/19/2022]
Abstract
Biofilms pose a major challenge to control wound-associated infections. Due to biofilm impenetrability, traditional antimicrobial agents are often ineffective in combating biofilms. Herein, a biphasic scaffold is reported as an antimicrobial delivery system by integrating nanofiber mats with dissolvable microneedle arrays for the effective treatment of bacterial biofilms. Different combinations of antimicrobial agents, including AgNO3 , Ga(NO3 )3 , and vancomycin, are incorporated into nanofiber mats by coaxial electrospinning, which enables sustained delivery of these drugs. The antimicrobial agents-incorporated dissolvable microneedle arrays allow direct penetration of drugs into biofilms. By optimizing the administration strategies, drug combinations, and microneedle densities, biphasic scaffolds are able to eradicate both methicillin-resistant Staphylococcus aureus (MRSA) and MRSA/Pseudomonas aeruginosa blend biofilms in an ex vivo human skin wound infection model without necessitating surgical debridement. Taken together, the combinatorial system comprises of nanofiber mats and microneedle arrays can provide an efficacious delivery of multiple antimicrobial agents for the treatment of bacterial biofilms in wounds.
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Affiliation(s)
- Yajuan Su
- Department of Surgery-Transplant and Mary and Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Alec McCarthy
- Department of Surgery-Transplant and Mary and Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Shannon L Wong
- Department of Surgery-Plastic Surgery, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Ronald R Hollins
- Department of Surgery-Plastic Surgery, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Guangshun Wang
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Jingwei Xie
- Department of Surgery-Transplant and Mary and Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE, 68198, USA
- Department of Mechanical and Materials Engineering, College of Engineering, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
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25
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Rios-Navarro A, Gonzalez M, Carazzone C, Celis Ramírez AM. Learning about microbial language: possible interactions mediated by microbial volatile organic compounds (VOCs) and relevance to understanding Malassezia spp. metabolism. Metabolomics 2021; 17:39. [PMID: 33825999 PMCID: PMC8026438 DOI: 10.1007/s11306-021-01786-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 03/13/2021] [Indexed: 02/08/2023]
Abstract
BACKGROUND Microorganisms synthesize and release a large diversity of small molecules like volatile compounds, which allow them to relate and interact with their environment. Volatile organic compounds (VOCs) are carbon-based compounds with low molecular weight and generally, high vapor pressure; because of their nature, they spread easily in the environment. Little is known about the role of VOCs in the interaction processes, and less is known about VOCs produced by Malassezia, a genus of yeasts that belongs to the human skin mycobiota. These yeasts have been associated with several dermatological diseases and currently, they are considered as emerging opportunistic yeasts. Research about secondary metabolites of these yeasts is limited. The pathogenic role and the molecular mechanisms involved in the infection processes of this genus are yet to be clarified. VOCs produced by Malassezia yeasts could play an important function in their metabolism; in addition, they might be involved in either beneficial or pathogenic host-interaction processes. Since these yeasts present differences in their nutritional requirements, like lipids to grow, it is possible that these variations of growth requirements also define differences in the volatile organic compounds produced in Malassezia species. AIM OF REVIEW We present a mini review about VOCs produced by microorganisms and Malassezia species, and hypothesize about their role in its metabolism, which would reveal clues about host-pathogen interaction. KEY SCIENTIFIC CONCEPTS OF REVIEW Since living organisms inhabit a similar environment, the interaction processes occur naturally; as a result, a signal and a response from participants of these processes become important in understanding several biological behaviors. The efforts to elucidate how living organisms interact has been studied from several perspectives. An important issue is that VOCs released by the microbiota plays a key role in the setup of relationships between living micro and macro organisms. The challenge is to determine what is the role of these VOCs produced by human microbiota in commensal/pathogenic scenarios, and how these allow understanding the species metabolism. Malassezia is part of the human mycobiota, and it is implicated in commensal and pathogenic processes. It is possible that their VOCs are involved in these behavioral changes, but the knowledge about this remains overlocked. For this reason, VOCs produced by microorganisms and Malassezia spp. and their role in several biological processes are the main topic in this review.
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Affiliation(s)
- Andrea Rios-Navarro
- grid.7247.60000000419370714Cellular and Molecular of Pathogenic Microorganisms Research Group (CeMoP), Biological Sciences Department, Universidad de Los Andes, Cra 1 No. 18A-12, Bogotá, 111711 Cundinamarca Colombia
| | - Mabel Gonzalez
- grid.7247.60000000419370714Laboratory of Advanced Analytical Techniques in Natural Products (LATNAP), Chemistry Department, Universidad de Los Andes, Cra 1 No. 18A-12, Bogotá, 111711 Cundinamarca Colombia
| | - Chiara Carazzone
- grid.7247.60000000419370714Laboratory of Advanced Analytical Techniques in Natural Products (LATNAP), Chemistry Department, Universidad de Los Andes, Cra 1 No. 18A-12, Bogotá, 111711 Cundinamarca Colombia
| | - Adriana Marcela Celis Ramírez
- grid.7247.60000000419370714Cellular and Molecular of Pathogenic Microorganisms Research Group (CeMoP), Biological Sciences Department, Universidad de Los Andes, Cra 1 No. 18A-12, Bogotá, 111711 Cundinamarca Colombia
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26
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Koskinen K, Penttinen R, Örmälä-Odegrip AM, Giske CG, Ketola T, Jalasvuori M. Systematic Comparison of Epidemic and Non-Epidemic Carbapenem Resistant Klebsiella pneumoniae Strains. Front Cell Infect Microbiol 2021; 11:599924. [PMID: 33708644 PMCID: PMC7940544 DOI: 10.3389/fcimb.2021.599924] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 01/08/2021] [Indexed: 11/13/2022] Open
Abstract
Over the past few decades, extensively drug resistant (XDR) resistant Klebsiella pneumoniae has become a notable burden to healthcare all over the world. Especially carbapenemase-producing strains are problematic due to their capability to withstand even last resort antibiotics. Some sequence types (STs) of K. pneumoniae are significantly more prevalent in hospital settings in comparison to other equally resistant strains. This provokes the question whether or not there are phenotypic characteristics that may render certain K. pneumoniae more suitable for epidemic dispersal between patients, hospitals, and different environments. In this study, we selected seven epidemic and non-epidemic carbapenem resistant K. pneumoniae isolates for extensive systematic characterization for phenotypic and genotypic qualities in order to identify potential factors that precede or emerge from epidemic successfulness. Studied characteristics include growth rates and densities in different conditions (media, temperature, pH, resource levels), tolerance to alcohol and drought, inhibition between strains, ability to compensate pH, as well as various genomic features. Overall, there are clear differences between isolates, yet, only drought tolerance was found to notably associate with non-epidemic K. pneumoniae strains. We further report a preliminary study on the potential to control K. pneumoniae ST11 with an antimicrobial component produced by a non-epidemic K. pneumoniae. This component initially restricts bacterial growth, but stable resistance develops rapidly in vitro.
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Affiliation(s)
- Katariina Koskinen
- Department of Biological and Environmental Science, Nanoscience Center, University of Jyväskylä, Jyväskylä, Finland
| | | | - Anni-Maria Örmälä-Odegrip
- Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Christian G Giske
- Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden.,Department of Clinical Microbiology, Karolinska University Hospital, Stockholm, Sweden
| | - Tarmo Ketola
- Department of Biological and Environmental Science, Nanoscience Center, University of Jyväskylä, Jyväskylä, Finland
| | - Matti Jalasvuori
- Department of Biological and Environmental Science, Nanoscience Center, University of Jyväskylä, Jyväskylä, Finland
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27
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Arshad MS, Zahra AT, Zafar S, Zaman H, Akhtar A, Ayaz MM, Kucuk I, Maniruzzaman M, Chang MW, Ahmad Z. Antibiofilm Effects of Macrolide Loaded Microneedle Patches: Prospects in Healing Infected Wounds. Pharm Res 2021; 38:165-177. [PMID: 33534130 DOI: 10.1007/s11095-021-02995-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 11/05/2020] [Indexed: 11/26/2022]
Abstract
AIM The aim of this study was to fabricate polymeric microneedles, loaded with macrolides (erythromycin, azithromycin), using hyaluronic acid and polyvinyl pyrollidone. METHODS These microneedles were fabricated using a vacuum micromolding technique. The integrity of the microneedle patches was studied by recording their morphologic features, folding endurance, swelling and micro-piercing. Physicochemical characteristics were studied by differential scanning calorimetry, thermogravimetric analysis and fourier transform infrared spectroscopy. In-vitro drug release, antibiofilm and effect of microneedle patch on wound healing were also studied to confirm the efficacy of the formulations. RESULTS Formulated patches displayed acceptable folding endurance (>100) and uniform distribution of microneedles (10 × 10) that can penetrate parafilm. Differential scanning calorimetry results depict a decrease in the crystallinity of macrolides following their incorporation in to a polymer matrix. Percentage release of azithromycin and erythromycin from the polymeric patch formulations (over 30 min) was 90% and 63% respectively. Broadly, the zone of bacterial growth inhibition follows the same order for Staphylococcus aureus, Escherichia coli and Salmonella enterica. After 5 days of treatment with azithromycin patches, the wound healing was complete and skin structure (e.g. hair follicles and dermis) was regenerated. CONCLUSION It was concluded that azithromycin loaded microneedle patches can be used to treat biofilms in the infected wounds.
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Affiliation(s)
| | | | - Saman Zafar
- Faculty of Pharmacy, Bahauddin Zakariya University, Multan, Pakistan
| | - Hussain Zaman
- Leicester School of Pharmacy, De Montfort University, Leicester, UK
| | - Ambreen Akhtar
- Leicester School of Pharmacy, De Montfort University, Leicester, UK
| | - Muhammad Mazhar Ayaz
- Department of Parasitology, Cholistan University of Veterinary and Animal Sciences, Bahawalpur, Pakistan
| | - Israfil Kucuk
- Institute of Nanotechnology, Gebze Technical University, Gebze, Turkey
| | - Mohammed Maniruzzaman
- Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, University of Texas at Austin, Austin, Texas, USA
| | - Ming-Wei Chang
- Nanotechnology and Integrated Bioengineering Centre, University of Ulster, Newtownabbey, Belfast, Northern Ireland, UK
| | - Zeeshan Ahmad
- Leicester School of Pharmacy, De Montfort University, Leicester, UK.
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28
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Phan J, Ranjbar S, Kagawa M, Gargus M, Hochbaum AI, Whiteson KL. Thriving Under Stress: Pseudomonas aeruginosa Outcompetes the Background Polymicrobial Community Under Treatment Conditions in a Novel Chronic Wound Model. Front Cell Infect Microbiol 2020; 10:569685. [PMID: 33123495 PMCID: PMC7573134 DOI: 10.3389/fcimb.2020.569685] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 09/03/2020] [Indexed: 11/13/2022] Open
Abstract
In vitro infection models are important for studying the effects of antimicrobials on microbial growth and metabolism. However, many models lack important biological components that resemble the polymicrobial nature of chronic wounds or infections. In this study, we developed a perfused meat model that supports the growth of the human pathogen Pseudomonas aeruginosa in a native meat microbial background to investigate the impact of antibiotics and hydrogen peroxide on polymicrobial community growth and metabolism. P. aeruginosa plays an important role as an etiological agent involved in chronic infections and is a common opportunistic pathogen. Chemical stressors in the form of hydrogen peroxide, carbenicillin, and gentamicin were perfused through the meat with polymicrobial growth on the surface. The relative abundances of P. aeruginosa and the background microbial community were analyzed by cell viability assays, and metabolic changes of the entire community in response to different antimicrobial treatments were characterized by GC-MS analysis of volatile organic compounds. The meat background community was characterized by amplicon sequencing. Relative densities of P. aeruginosa and background microbiota were similar under control conditions. Antimicrobial stressors, even at sub-inhibitory, physiologically relevant concentrations, spurred P. aeruginosa dominance of the meat surface community. Volatile metabolite ion intensity levels showed that antibacterial treatments drive changes in microbial metabolism. The abundance of the P. aeruginosa-derived metabolite, acetophenone, remained stable with treatment, whereas the relative abundances of 2-butanone, 2-nonanone, and 2-aminoacetophenone changed in response to treatment, suggesting these could serve as biomarkers of infection. Our model recapitulates some of the physiological conditions of chronic wounds and facilitates high throughput experiments without the high cost of in vivo models. Expanded use of this perfusion model will contribute to the understanding of polymicrobial growth and metabolism in the context of chronic wounds and infections.
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Affiliation(s)
- Joann Phan
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, CA, United States
| | - Saba Ranjbar
- Department of Chemical and Biomolecular Engineering, University of California, Irvine, Irvine, CA, United States
| | - Miki Kagawa
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, CA, United States
| | - Matthew Gargus
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, CA, United States
| | - Allon Israel Hochbaum
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, CA, United States.,Department of Chemical and Biomolecular Engineering, University of California, Irvine, Irvine, CA, United States.,Department of Materials Science and Engineering, University of California, Irvine, Irvine, CA, United States.,Department of Chemistry, University of California, Irvine, Irvine, CA, United States
| | - Katrine L Whiteson
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, CA, United States
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29
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Multi-strain volatile profiling of pathogenic and commensal cutaneous bacteria. Sci Rep 2020; 10:17971. [PMID: 33087843 PMCID: PMC7578783 DOI: 10.1038/s41598-020-74909-w] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 10/08/2020] [Indexed: 12/12/2022] Open
Abstract
The detection of volatile organic compounds (VOC) emitted by pathogenic bacteria has been proposed as a potential non-invasive approach for characterising various infectious diseases as well as wound infections. Studying microbial VOC profiles in vitro allows the mechanisms governing VOC production and the cellular origin of VOCs to be deduced. However, inter-study comparisons of microbial VOC data remains a challenge due to the variation in instrumental and growth parameters across studies. In this work, multiple strains of pathogenic and commensal cutaneous bacteria were analysed using headspace solid phase micro-extraction coupled with gas chromatography-mass spectrometry. A kinetic study was also carried out to assess the relationship between bacterial VOC profiles and the growth phase of cells. Comprehensive bacterial VOC profiles were successfully discriminated at the species-level, while strain-level variation was only observed in specific species and to a small degree. Temporal emission kinetics showed that the emission of particular compound groups were proportional to the respective growth phase for individual S. aureus and P. aeruginosa samples. Standardised experimental workflows are needed to improve comparability across studies and ultimately elevate the field of microbial VOC profiling. Our results build on and support previous literature and demonstrate that comprehensive discriminative results can be achieved using simple experimental and data analysis workflows.
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30
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Quintieri L, Caputo L, Monaci L, Cavalluzzi MM, Denora N. Lactoferrin-Derived Peptides as a Control Strategy against Skinborne Staphylococcal Biofilms. Biomedicines 2020; 8:E323. [PMID: 32883023 PMCID: PMC7554924 DOI: 10.3390/biomedicines8090323] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Revised: 08/29/2020] [Accepted: 08/29/2020] [Indexed: 12/31/2022] Open
Abstract
Coagulase-negative staphylococci (CoNS) widely colonize the human skin and play an active role in host defense. However, these bacteria may cause malodours and increase infection incidence rate in immune-compromised patients and individuals with catheters and implants. CoNS spreading is favored by biofilm formation that also promotes the release of virulence factors and drug resistance. Biofilm control or eradication by antimicrobial peptides (AMPs) represents an attractive strategy which is worth investigating. In this work, bovine lactoferrin (BLF) hydrolysate (HLF) was in vitro evaluated for its antimicrobial and antibiofilm activities against skin-related coagulase negative and positive staphylococci. Despite a minimal inhibitory concentration (MIC) recorded for HLF ranging from 10 to more than 20 mg/mL, a minimal biofilm inhibitory concentration (MIBC) equal to 2.5 mg/mL was found for most target strains. Conversely, MIBC values referred to the individual peptides, LFcinB or LFmpin (herein purified and identified) were significantly lower. Finally, the application of 2.5 mg/mL HLF solution by dipping and spraying on biofilm-attached glass surfaces also caused a high biofilm eradication rate depending on the incubation time, thus attracting interest for future applications in cosmetic formulation for skin care.
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Affiliation(s)
- Laura Quintieri
- Institute of Sciences of Food Production (CNR-ISPA) National Council of Research, Via G. Amendola, 122/O, 70126 Bari, Italy; (L.Q.); (L.M.)
| | - Leonardo Caputo
- Institute of Sciences of Food Production (CNR-ISPA) National Council of Research, Via G. Amendola, 122/O, 70126 Bari, Italy; (L.Q.); (L.M.)
| | - Linda Monaci
- Institute of Sciences of Food Production (CNR-ISPA) National Council of Research, Via G. Amendola, 122/O, 70126 Bari, Italy; (L.Q.); (L.M.)
| | - Maria Maddalena Cavalluzzi
- Department of Pharmacy-Drug Sciences, University of Studies of Bari Aldo Moro, Via E. Orabona, 4, 70126 Bari, Italy; (M.M.C.); (N.D.)
| | - Nunzio Denora
- Department of Pharmacy-Drug Sciences, University of Studies of Bari Aldo Moro, Via E. Orabona, 4, 70126 Bari, Italy; (M.M.C.); (N.D.)
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31
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Kawano Y, Jordan O, Hanawa T, Borchard G, Patrulea V. Are Antimicrobial Peptide Dendrimers an Escape from ESKAPE? Adv Wound Care (New Rochelle) 2020; 9:378-395. [PMID: 32320368 PMCID: PMC7307686 DOI: 10.1089/wound.2019.1113] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 03/18/2020] [Indexed: 12/16/2022] Open
Abstract
Significance: The crisis of antimicrobial resistance (AMR) increases dramatically despite all efforts to use available antibiotics or last resort antimicrobial agents. The spread of the AMR, declared as one of the most important health-related issues, warrants the development of new antimicrobial strategies. Recent Advances: Antimicrobial peptides (AMPs) and AMP dendrimers (AMPDs), as well as polymer dendrimers are relatively new and promising strategies with the potential to overcome drug resistance issues arising in ESKAPE pathogens (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species) colonizing chronic wounds. Critical Issues: AMPs-AMPDs suffer from limited efficacy, short-lasting bioactivity, and concerns of toxicity. To circumvent these drawbacks, their covalent coupling to biopolymers and/or encapsulation into different drug carrier systems is investigated, with a special focus on topical applications. Future Directions: Scientists and the pharmaceutical industry should focus on this challenging subject to either improve the activity of existing antimicrobial agents or find new drug candidates. The focus should be put on the discovery of new drugs or the combination of existing drugs for a better synergy, taking into account all kinds of wounds and existing pathogens, and more specifically on the development of next-generation antimicrobial peptides, encompassing the delivery carrier toward improved pharmacokinetics and efficacy.
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Affiliation(s)
- Yayoi Kawano
- Laboratory of Preformulation Study, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Olivier Jordan
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Geneva, Switzerland
| | - Takehisa Hanawa
- Laboratory of Preformulation Study, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Chiba, Japan
| | - Gerrit Borchard
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Geneva, Switzerland
| | - Viorica Patrulea
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Geneva, Switzerland
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32
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Elmassry MM, Piechulla B. Volatilomes of Bacterial Infections in Humans. Front Neurosci 2020; 14:257. [PMID: 32269511 PMCID: PMC7111428 DOI: 10.3389/fnins.2020.00257] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 03/09/2020] [Indexed: 02/06/2023] Open
Abstract
Sense of smell in humans has the capacity to detect certain volatiles from bacterial infections. Our olfactory senses were used in ancient medicine to diagnose diseases in patients. As humans are considered holobionts, each person's unique odor consists of volatile organic compounds (VOCs, volatilome) produced not only by the humans themselves but also by their beneficial and pathogenic micro-habitants. In the past decade it has been well documented that microorganisms (fungi and bacteria) are able to emit a broad range of olfactory active VOCs [summarized in the mVOC database (http://bioinformatics.charite.de/mvoc/)]. During microbial infection, the equilibrium between the human and its microbiome is altered, followed by a change in the volatilome. For several decades, physicians have been trying to utilize these changes in smell composition to develop fast and efficient diagnostic tools, particularly because volatiles detection is non-invasive and non-destructive, which would be a breakthrough in many therapies. Within this review, we discuss bacterial infections including gastrointestinal, respiratory or lung, and blood infections, focusing on the pathogens and their known corresponding volatile biomarkers. Furthermore, we cover the potential role of the human microbiota and their volatilome in certain diseases such as neurodegenerative diseases. We also report on discrete mVOCs that affect humans.
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Affiliation(s)
- Moamen M. Elmassry
- Department of Biological Sciences, Texas Tech University, Lubbock, TX, United States
| | - Birgit Piechulla
- Institute for Biological Sciences, University of Rostock, Rostock, Germany
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33
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Jones LM, Dunham D, Rennie MY, Kirman J, Lopez AJ, Keim KC, Little W, Gomez A, Bourke J, Ng H, DaCosta RS, Smith AC. In vitro detection of porphyrin-producing wound bacteria with real-time fluorescence imaging. Future Microbiol 2020; 15:319-332. [PMID: 32101035 DOI: 10.2217/fmb-2019-0279] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Aim: Fluorescence imaging can visualize polymicrobial populations in chronic and acute wounds based on porphyrin fluorescence. We investigated the fluorescent properties of specific wound pathogens and the fluorescence detected from bacteria in biofilm. Methods: Utilizing Remel Porphyrin Test Agar, 32 bacterial and four yeast species were examined for red fluorescence under 405 nm violet light illumination. Polymicrobial biofilms, supplemented with δ-aminolevulinic acid, were investigated similarly. Results: A total of 28/32 bacteria, 1/4 yeast species and polymicrobial biofilms produced red fluorescence, in agreement with their known porphyrin production abilities. Conclusion: These results identify common wound pathogens capable of producing porphyrin-specific fluorescence and support clinical observations using fluorescence imaging to detect pathogenic bacteria in chronic wounds.
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Affiliation(s)
| | | | | | | | - Andrea J Lopez
- Department of Honors Studies, Texas Tech University, Lubbock, TX 79409, USA
| | - Klara C Keim
- Department of Honors Studies, Texas Tech University, Lubbock, TX 79409, USA
| | - William Little
- Department of Honors Studies, Texas Tech University, Lubbock, TX 79409, USA
| | - Andre Gomez
- Department of Honors Studies, Texas Tech University, Lubbock, TX 79409, USA
| | - Jessica Bourke
- Department of Microbiology, University Health Network/Sinai Health System, Toronto, ON, M5G 1X5, Canada
| | - Herman Ng
- Department of Microbiology, University Health Network/Sinai Health System, Toronto, ON, M5G 1X5, Canada
| | - Ralph S DaCosta
- MolecuLight Inc., Toronto, ON M5G 1T6, Canada.,Princess Margaret Cancer Center, University Health Network, Toronto, ON, M5G 2C1, Canada
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34
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Kadam S, Nadkarni S, Lele J, Sakhalkar S, Mokashi P, Kaushik KS. Corrigendum: Bioengineered Platforms for Chronic Wound Infection Studies: How Can We Make Them More Human-Relevant? Front Bioeng Biotechnol 2020; 7:449. [PMID: 32117902 PMCID: PMC7011166 DOI: 10.3389/fbioe.2019.00449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 12/17/2019] [Indexed: 11/15/2022] Open
Affiliation(s)
- Snehal Kadam
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune, India
| | | | | | | | | | - Karishma Surendra Kaushik
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune, India
- *Correspondence: Karishma Surendra Kaushik
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35
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Slade EA, Thorn RMS, Young A, Reynolds DM. An in vitro collagen perfusion wound biofilm model; with applications for antimicrobial studies and microbial metabolomics. BMC Microbiol 2019; 19:310. [PMID: 31888471 PMCID: PMC6937849 DOI: 10.1186/s12866-019-1682-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 12/11/2019] [Indexed: 12/12/2022] Open
Abstract
Background The majority of in vitro studies of medically relevant biofilms involve the development of biofilm on an inanimate solid surface. However, infection in vivo consists of biofilm growth on, or suspended within, the semi-solid matrix of the tissue, whereby current models do not effectively simulate the nature of the in vivo environment. This paper describes development of an in vitro method for culturing wound associated microorganisms in a system that combines a semi-solid collagen gel matrix with continuous flow of simulated wound fluid. This enables culture of wound associated reproducible steady state biofilms under conditions that more closely simulate the dynamic wound environment. To demonstrate the use of this model the antimicrobial kinetics of ceftazidime, against both mature and developing Pseudomonas aeruginosa biofilms, was assessed. In addition, we have shown the potential application of this model system for investigating microbial metabolomics by employing selected ion flow tube mass spectrometry (SIFT-MS) to monitor ammonia and hydrogen cyanide production by Pseudomonas aeruginosa biofilms in real-time. Results The collagen wound biofilm model facilitates growth of steady-state reproducible Pseudomonas aeruginosa biofilms under wound like conditions. A maximum biofilm density of 1010 cfu slide− 1 was achieved by 30 h of continuous culture and maintained throughout the remainder of the experiment. Treatment with ceftazidime at a clinically relevant dose resulted in a 1.2–1.6 log reduction in biofilm density at 72 h compared to untreated controls. Treatment resulted in loss of complex biofilm architecture and morphological changes to bacterial cells, visualised using confocal microscopy. When monitoring the biofilms using SIFT-MS, ammonia and hydrogen cyanide levels peaked at 12 h at 2273 ppb (±826.4) and 138 ppb (±49.1) respectively and were detectable throughout experimentation. Conclusions The collagen wound biofilm model has been developed to facilitate growth of reproducible biofilms under wound-like conditions. We have successfully used this method to: (1) evaluate antimicrobial efficacy and kinetics, clearly demonstrating the development of antimicrobial tolerance in biofilm cultures; (2) characterise volatile metabolite production by P. aeruginosa biofilms, demonstrating the potential use of this method in metabolomics studies.
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Affiliation(s)
- Elisabeth A Slade
- Centre for Research in Biosciences, University of the West of England, Bristol, UK
| | - Robin M S Thorn
- Centre for Research in Biosciences, University of the West of England, Bristol, UK
| | - Amber Young
- Scar Free Foundation Centre for Children's Burns Research, Bristol Royal Hospital for Children, Bristol, UK
| | - Darren M Reynolds
- Centre for Research in Biosciences, University of the West of England, Bristol, UK. .,University of the West of England, Frenchay Campus, Coldharbour Lane, Bristol, BS16 1QY, England.
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36
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Kadam S, Nadkarni S, Lele J, Sakhalkar S, Mokashi P, Kaushik KS. Bioengineered Platforms for Chronic Wound Infection Studies: How Can We Make Them More Human-Relevant? Front Bioeng Biotechnol 2019; 7:418. [PMID: 31921821 PMCID: PMC6923179 DOI: 10.3389/fbioe.2019.00418] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 11/29/2019] [Indexed: 12/19/2022] Open
Abstract
Chronic wound infections are an important cause of delayed wound healing, posing a significant healthcare burden with consequences that include hospitalization, amputation, and death. These infections most often take the form of three-dimensional biofilm communities, which are notoriously recalcitrant to antibiotics and immune clearance, contributing to the chronic wound state. In the chronic wound microenvironment, microbial biofilms interact closely with other key components, including host cellular and matrix elements, immune cells, inflammatory factors, signaling components, and mechanical cues. Intricate relationships between these contributing factors not only orchestrate the development and progression of wound infections but also influence the therapeutic outcome. Current medical treatment for chronic wound infections relies heavily on long-term usage of antibiotics; however, their efficacy and reasons for failure remain uncertain. To develop effective therapeutic approaches, it is essential to better understand the complex pathophysiology of the chronic wound infection microenvironment, including dynamic interactions between various key factors. For this, it is critical to develop bioengineered platforms or model systems that not only include key components of the chronic wound infection microenvironment but also recapitulate interactions between these factors, thereby simulating the infection state. In doing so, these platforms will enable the testing of novel therapeutics, alone and in combinations, providing insights toward composite treatment strategies. In the first section of this review, we discuss the key components and interactions in the chronic wound infection microenvironment, which would be critical to recapitulate in a bioengineered platform. In the next section, we summarize the key features and relevance of current bioengineered chronic wound infection platforms. These are categorized and discussed based on the microenvironmental components included and their ability to recapitulate the architecture, interactions, and outcomes of the infection microenvironment. While these platforms have advanced our understanding of the underlying pathophysiology of chronic wound infections and provided insights into therapeutics, they possess certain insufficiencies that limit their clinical relevance. In the final section, we propose approaches that can be incorporated into these existing model systems or developed into future platforms developed, thus enhancing their biomimetic and translational capabilities, and thereby their human-relevance.
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Affiliation(s)
- Snehal Kadam
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune, India
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37
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Photobiomodulation via multiple-wavelength radiations. Lasers Med Sci 2019; 35:307-316. [PMID: 31523781 DOI: 10.1007/s10103-019-02879-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Accepted: 09/06/2019] [Indexed: 10/26/2022]
Abstract
Photobiomodulation via a combination of different radiations can produce different effects on biological tissues, such as cell proliferation and differentiation, when compared to those produced via a single radiation. The present study aims to conduct a review of the literature addressing the results and applications of photobiomodulation induced by a combination of two or more radiations as well as their possible effects. PubMed was used to search for studies with restrictions on the year (< 50 years old) and language (English), including studies using human and animal models, either under healthy or pathologic conditions. Several studies have been conducted to evaluate the combination of different radiation effects on cells and biological tissues. Positive effects resulting from multiple-wavelength radiations could be attributed to different absorption levels because superficial and deep tissues could absorb different levels of radiations. Multiple-wavelength radiations from devices combining radiations emitted by low power lasers and light-emitting diodes could be a new approach for promoting photobiomodulation-induced beneficial effects.
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38
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Zhou Q, Wang Q, Chen B, Han Y, Cheng L, Shen Y, Hao P, Zhang Z. Factors influencing breath analysis results in patients with diabetes mellitus. J Breath Res 2019; 13:046012. [PMID: 31489846 DOI: 10.1088/1752-7163/ab285a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Breath analysis is used to detect the composition of exhaled gas. As a quick and non-invasive detection method, breath analysis provides deep insights into the progression of various kinds of diseases, especially those with metabolism disorders. Abundant information on volatile compounds in diabetic patients has been studied in numerous articles in the literature. However, exhaled gas in diabetic patients can be altered by various complications. So far, little attention has been paid to this alteration. In our paper, we found that under air pollution conditions, diabetic patients exhale more nitric oxide. Diabetic patients with heart failure exhale more acetone than those without heart failure. After 13C-labeled glucose intake, patients infected with Helicobacter pylori exhaled more 13C and less 18O than those without infection. Exhalation with chronic kidney disease changes volatile organic compounds on a large scale. Diabetic patients with ketoacidosis exhale more acetone than those without ketoacidosis. Some specific volatile organic compounds also emanate from diabetic feet. By monitoring breath frequency, diabetic patients with obstructive sleep apnea syndrome exhibit a unique breath pattern and rhythm as compared with other diabetic patients, and sleep apnea is prevalent among diabetic patients. In addition to clinical findings, we analyzed the underlying mechanisms at the levels of molecules, cells and whole bodies, and provided suggestions for further studies.
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Affiliation(s)
- Qing Zhou
- Department of Endocrinology, Shandong Provincial Qianfoshan Hospital, the First Hospital Affiliated with Shandong First Medical University, Department of Cardiology, Shandong University Qilu Hospital, and School of Medicine of Shandong University, Jinan, 250012, Shandong, People's Republic of China
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Thomé Lima AMC, da Silva Sergio LP, da Silva Neto Trajano LA, de Souza BP, da Motta Mendes JP, Cardoso AFR, Figueira CP, dos Anjos Tavares B, Figueira DS, Mencalha AL, Trajano ETL, de Souza da Fonseca A. Photobiomodulation by dual-wavelength low-power laser effects on infected pressure ulcers. Lasers Med Sci 2019; 35:651-660. [DOI: 10.1007/s10103-019-02862-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 08/16/2019] [Indexed: 12/12/2022]
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Duffy E, Morrin A. Endogenous and microbial volatile organic compounds in cutaneous health and disease. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2018.12.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Ashrafi M, Novak-Frazer L, Morris J, Baguneid M, Rautemaa-Richardson R, Bayat A. Electrical stimulation disrupts biofilms in a human wound model and reveals the potential for monitoring treatment response with volatile biomarkers. Wound Repair Regen 2018; 27:5-18. [DOI: 10.1111/wrr.12679] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 10/08/2018] [Indexed: 12/13/2022]
Affiliation(s)
- Mohammed Ashrafi
- Plastic & Reconstructive Surgery Research, Division of Musculoskeletal & Dermatological Sciences; School of Biological Sciences, University of Manchester; Manchester United Kingdom
- Manchester University NHS Foundation Trust; Wythenshawe Hospital; Manchester United Kingdom
- Bioengineering Group, School of Materials; University of Manchester; Manchester United Kingdom
| | - Lilyann Novak-Frazer
- Manchester University NHS Foundation Trust; Wythenshawe Hospital; Manchester United Kingdom
- Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, Division of Infection, Immunity and Respiratory Medicine; School of Biological Sciences, The University of Manchester and Manchester University NHS Foundation Trust; Manchester United Kingdom
| | - Julie Morris
- Honorary Reader in Medical Statistics; Manchester University NHS Foundation Trust, Wythenshawe Hospital; Manchester United Kingdom
| | - Mohamed Baguneid
- Manchester University NHS Foundation Trust; Wythenshawe Hospital; Manchester United Kingdom
| | - Riina Rautemaa-Richardson
- Manchester University NHS Foundation Trust; Wythenshawe Hospital; Manchester United Kingdom
- Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, Division of Infection, Immunity and Respiratory Medicine; School of Biological Sciences, The University of Manchester and Manchester University NHS Foundation Trust; Manchester United Kingdom
| | - Ardeshir Bayat
- Plastic & Reconstructive Surgery Research, Division of Musculoskeletal & Dermatological Sciences; School of Biological Sciences, University of Manchester; Manchester United Kingdom
- Manchester University NHS Foundation Trust; Wythenshawe Hospital; Manchester United Kingdom
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