51
|
Alabresm A, Chandler SL, Benicewicz BC, Decho AW. Nanotargeting of Resistant Infections with a Special Emphasis on the Biofilm Landscape. Bioconjug Chem 2021; 32:1411-1430. [PMID: 34319073 PMCID: PMC8527872 DOI: 10.1021/acs.bioconjchem.1c00116] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Bacterial resistance to antimicrobial compounds is a growing concern in medical and public health circles. Overcoming the adaptable and duplicative resistance mechanisms of bacteria requires chemistry-based approaches. Engineered nanoparticles (NPs) now offer unique advantages toward this effort. However, most in situ infections (in humans) occur as attached biofilms enveloped in a protective surrounding matrix of extracellular polymers, where survival of microbial cells is enhanced. This presents special considerations in the design and deployment of antimicrobials. Here, we review recent efforts to combat resistant bacterial strains using NPs and, then, explore how NP surfaces may be specifically engineered to enhance the potency and delivery of antimicrobial compounds. Special NP-engineering challenges in the design of NPs must be overcome to penetrate the inherent protective barriers of the biofilm and to successfully deliver antimicrobials to bacterial cells. Future challenges are discussed in the development of new antibiotics and their mechanisms of action and targeted delivery via NPs.
Collapse
Affiliation(s)
- Amjed Alabresm
- Department of Environmental Health Sciences, University of South Carolina, Columbia, South Carolina 29208, United States
- Department of Biological Development of Shatt Al-Arab & N. Arabian Gulf, Marine Science Centre, University of Basrah, Basrah, Iraq
| | - Savannah L Chandler
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Brian C Benicewicz
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
- USC NanoCenter, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Alan W Decho
- Department of Environmental Health Sciences, University of South Carolina, Columbia, South Carolina 29208, United States
| |
Collapse
|
52
|
Ghosh UU, Ali H, Ghosh R, Kumar A. Bacterial streamers as colloidal systems: Five grand challenges. J Colloid Interface Sci 2021; 594:265-278. [PMID: 33765646 DOI: 10.1016/j.jcis.2021.02.102] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 02/22/2021] [Accepted: 02/23/2021] [Indexed: 12/21/2022]
Abstract
Bacteria can thrive in biofilms, which are intricately organized communities with cells encased in a self-secreted matrix of extracellular polymeric substances (EPS). Imposed hydrodynamic stresses can transform this active colloidal dispersion of bacteria and EPS into slender thread-like entities called streamers. In this perspective article, the reader is introduced to the world of such deformable 'bacteria-EPS' composites that are a subclass of the generic flow-induced colloidal structures. While bacterial streamers have been shown to form in a variety of hydrodynamic conditions (turbulent and creeping flows), its abiotic analogues have only been demonstrated in low Reynolds number (Re < 1) particle-laden polymeric flows. Streamers are relevant to a variety of situations ranging from natural formations in caves and river beds to clogging of biomedical devices and filtration membranes. A critical review of the relevant biophysical aspects of streamer formation phenomena and unique attributes of its material behavior are distilled to unveil five grand scientific challenges. The coupling between colloidal hydrodynamics, device geometry and streamer formation are highlighted.
Collapse
Affiliation(s)
- Udita U Ghosh
- Department of Mechanical Engineering, Indian Institute of Science, Bangalore, India
| | - Hessein Ali
- Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL 32816, USA
| | - Ranajay Ghosh
- Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL 32816, USA.
| | - Aloke Kumar
- Department of Mechanical Engineering, Indian Institute of Science, Bangalore, India.
| |
Collapse
|
53
|
Seviour T, Winnerdy FR, Wong LL, Shi X, Mugunthan S, Foo YH, Castaing R, Adav SS, Subramoni S, Kohli GS, Shewan HM, Stokes JR, Rice SA, Phan AT, Kjelleberg S. The biofilm matrix scaffold of Pseudomonas aeruginosa contains G-quadruplex extracellular DNA structures. NPJ Biofilms Microbiomes 2021; 7:27. [PMID: 33741996 PMCID: PMC7979868 DOI: 10.1038/s41522-021-00197-5] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 02/12/2021] [Indexed: 12/31/2022] Open
Abstract
Extracellular DNA, or eDNA, is recognised as a critical biofilm component; however, it is not understood how it forms networked matrix structures. Here, we isolate eDNA from static-culture Pseudomonas aeruginosa biofilms using ionic liquids to preserve its biophysical signatures of fluid viscoelasticity and the temperature dependency of DNA transitions. We describe a loss of eDNA network structure as resulting from a change in nucleic acid conformation, and propose that its ability to form viscoelastic structures is key to its role in building biofilm matrices. Solid-state analysis of isolated eDNA, as a proxy for eDNA structure in biofilms, reveals non-canonical Hoogsteen base pairs, triads or tetrads involving thymine or uracil, and guanine, suggesting that the eDNA forms G-quadruplex structures. These are less abundant in chromosomal DNA and disappear when eDNA undergoes conformation transition. We verify the occurrence of G-quadruplex structures in the extracellular matrix of intact static and flow-cell biofilms of P. aeruginosa, as displayed by the matrix to G-quadruplex-specific antibody binding, and validate the loss of G-quadruplex structures in vivo to occur coincident with the disappearance of eDNA fibres. Given their stability, understanding how extracellular G-quadruplex structures form will elucidate how P. aeruginosa eDNA builds viscoelastic networks, which are a foundational biofilm property.
Collapse
Affiliation(s)
- Thomas Seviour
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, Singapore. .,WATEC Aarhus University Centre for Water Technology, Aarhus, Denmark.
| | - Fernaldo Richtia Winnerdy
- School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, Singapore
| | - Lan Li Wong
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, Singapore
| | - Xiangyan Shi
- School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, Singapore
| | - Sudarsan Mugunthan
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, Singapore
| | - Yong Hwee Foo
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, Singapore
| | - Remi Castaing
- Materials and Chemical Characterisation Facility (MC2), University of Bath, Bath, UK
| | - Sunil S Adav
- Singapore Phenome Centre, Nanyang Technological University, Singapore, Singapore
| | - Sujatha Subramoni
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, Singapore
| | - Gurjeet Singh Kohli
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, Singapore
| | - Heather M Shewan
- School of Chemical Engineering, University of Queensland, Brisbane, QLD, Australia
| | - Jason R Stokes
- School of Chemical Engineering, University of Queensland, Brisbane, QLD, Australia
| | - Scott A Rice
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, Singapore.,The iThree Institute, University of Technology Sydney, Sydney, NSW, Australia.,School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Anh Tuân Phan
- School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, Singapore
| | - Staffan Kjelleberg
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, Singapore. .,School of Biological Sciences, Nanyang Technological University, Singapore, Singapore. .,School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW, Australia.
| |
Collapse
|
54
|
Gloag ES, Wozniak DJ, Stoodley P, Hall-Stoodley L. Mycobacterium abscessus biofilms have viscoelastic properties which may contribute to their recalcitrance in chronic pulmonary infections. Sci Rep 2021; 11:5020. [PMID: 33658597 PMCID: PMC7930093 DOI: 10.1038/s41598-021-84525-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 02/10/2021] [Indexed: 12/11/2022] Open
Abstract
Mycobacterium abscessus is emerging as a cause of recalcitrant chronic pulmonary infections, particularly in people with cystic fibrosis (CF). Biofilm formation has been implicated in the pathology of this organism, however the role of biofilm formation in infection is unclear. Two colony-variants of M. abscessus are routinely isolated from CF samples, smooth (MaSm) and rough (MaRg). These two variants display distinct colony morphologies due to the presence (MaSm) or absence (MaRg) of cell wall glycopeptidolipids (GPLs). We hypothesized that MaSm and MaRg variant biofilms might have different mechanical properties. To test this hypothesis, we performed uniaxial mechanical indentation, and shear rheometry on MaSm and MaRg colony-biofilms. We identified that MaRg biofilms were significantly stiffer than MaSm under a normal force, while MaSm biofilms were more pliant compared to MaRg, under both normal and shear forces. Furthermore, using theoretical indices of mucociliary and cough clearance, we identified that M. abscessus biofilms may be more resistant to mechanical forms of clearance from the lung, compared to another common pulmonary pathogen, Pseudomonas aeruginosa. Thus, the mechanical properties of M. abscessus biofilms may contribute to the persistent nature of pulmonary infections caused by this organism.
Collapse
Affiliation(s)
- Erin S Gloag
- Department of Microbial Infection and Immunity, The Ohio State University, 711 Biomedical Research Tower, 460 W 12th Avenue, Columbus, OH, USA
| | - Daniel J Wozniak
- Department of Microbial Infection and Immunity, The Ohio State University, 711 Biomedical Research Tower, 460 W 12th Avenue, Columbus, OH, USA.,Department of Microbiology, The Ohio State University, Columbus, OH, 43210, USA
| | - Paul Stoodley
- Department of Microbial Infection and Immunity, The Ohio State University, 711 Biomedical Research Tower, 460 W 12th Avenue, Columbus, OH, USA.,Department of Orthopedics, The Ohio State University, Columbus, OH, 43210, USA.,National Biofilm Innovation Centre (NBIC) and National Centre for Advanced Tribology at Southampton (nCATS), University of Southampton, Southampton, SO17 1BJ, UK
| | - Luanne Hall-Stoodley
- Department of Microbial Infection and Immunity, The Ohio State University, 711 Biomedical Research Tower, 460 W 12th Avenue, Columbus, OH, USA.
| |
Collapse
|
55
|
Flemming HC, Baveye P, Neu TR, Stoodley P, Szewzyk U, Wingender J, Wuertz S. Who put the film in biofilm? The migration of a term from wastewater engineering to medicine and beyond. NPJ Biofilms Microbiomes 2021; 7:10. [PMID: 33504794 PMCID: PMC7840925 DOI: 10.1038/s41522-020-00183-3] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Accepted: 12/17/2020] [Indexed: 02/06/2023] Open
Abstract
Sessile microorganisms were described as early as the seventeenth century. However, the term biofilm arose only in the 1960s in wastewater treatment research and was adopted later in marine fouling and in medical and dental microbiology. The sessile mode of microbial life was gradually recognized to be predominant on Earth, and the term biofilm became established for the growth of microorganisms in aggregates, frequently associated with interfaces, although many, if not the majority, of them not being continuous "films" in the strict sense. In this sessile form of life, microorganisms live in close proximity in a matrix of extracellular polymeric substances (EPS). They share emerging properties, clearly distinct from solitary free floating planktonic microbial cells. Common characteristics include the formation of synergistic microconsortia, using the EPS matrix as an external digestion system, the formation of gradients and high biodiversity over microscopically small distances, resource capture and retention, facilitated gene exchange as well as intercellular communication, and enhanced tolerance to antimicrobials. Thus, biofilms belong to the class of collective systems in biology, like forests, beehives, or coral reefs, although the term film addresses only one form of the various manifestations of microbial aggregates. The uncertainty of this term is discussed, and it is acknowledged that it will not likely be replaced soon, but it is recommended to understand these communities in the broader sense of microbial aggregates.
Collapse
Affiliation(s)
- Hans-Curt Flemming
- grid.59025.3b0000 0001 2224 0361Singapore Centre for Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University Singapore, 60 Nanyang Drive, Singapore, 637551 Singapore ,grid.5718.b0000 0001 2187 5445University of Duisburg-Essen, Biofilm Centre, Universitätsstrasse 5, 45131 Essen, Germany ,Water Academy, Schloss-Strasse 40, 88045 Friedrichshafen, Germany
| | - Philippe Baveye
- Saint Loup Research Institute, 7 rue des chênes, 79600 Saint Loup Lamairé, France
| | - Thomas R. Neu
- grid.7492.80000 0004 0492 3830Department of River Ecology, Helmholtz Centre for Environmental Research–UFZ, Magdeburg, Germany
| | - Paul Stoodley
- grid.261331.40000 0001 2285 7943Department of Microbial Infection and Immunity and the Department of Orthopaedics, The Ohio State University, Columbus, OH 43210 USA ,grid.5491.90000 0004 1936 9297National Centre for Advanced Tribology at Southampton (nCATS), National Biofilm Innovation Centre (NBIC), Mechanical Engineering, University of Southampton, Southampton, S017 1BJ UK
| | - Ulrich Szewzyk
- grid.7492.80000 0004 0492 3830Technical University of Berlin, Department of Environmental Microbiology, Ernst-Reuter-Platz 1, D-10587 Berlin, Germany
| | - Jost Wingender
- grid.5718.b0000 0001 2187 5445University of Duisburg-Essen, Biofilm Centre, Universitätsstrasse 5, 45131 Essen, Germany
| | - Stefan Wuertz
- grid.59025.3b0000 0001 2224 0361Singapore Centre for Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University Singapore, 60 Nanyang Drive, Singapore, 637551 Singapore ,grid.59025.3b0000 0001 2224 0361School of Civil and Environmental Engineering, Nanyang Technological University Singapore, 50 Nanyang Avenue, Singapore, 639798 Singapore
| |
Collapse
|
56
|
Walsh DJ, Livinghouse T, Durling GM, Arnold AD, Brasier W, Berry L, Goeres DM, Stewart PS. Novel phenolic antimicrobials enhanced activity of iminodiacetate prodrugs against biofilm and planktonic bacteria. Chem Biol Drug Des 2021; 97:134-147. [PMID: 32844569 PMCID: PMC7821224 DOI: 10.1111/cbdd.13768] [Citation(s) in RCA: 3] [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: 05/25/2020] [Revised: 07/09/2020] [Accepted: 07/19/2020] [Indexed: 12/23/2022]
Abstract
Prodrugs are pharmacologically attenuated derivatives of drugs that undergo bioconversion into the active compound once reaching the targeted site, thereby maximizing their efficiency. This strategy has been implemented in pharmaceuticals to overcome obstacles related to absorption, distribution, and metabolism, as well as with intracellular dyes to ensure concentration within cells. In this study, we provide the first examples of a prodrug strategy that can be applied to simple phenolic antimicrobials to increase their potency against mature biofilms. The addition of (acetoxy)methyl iminodiacetate groups increases the otherwise modest potency of simple phenols. Biofilm-forming bacteria exhibit a heightened tolerance toward antimicrobial agents, thereby accentuating the need for new antibiotics as well as those, which incorporate novel delivery strategies to enhance activity toward biofilms.
Collapse
Affiliation(s)
- Danica J. Walsh
- Chemistry and BiochemistryMontana State UniversityBozemanMTUSA
- Center for Biofilm EngineeringMontana State UniversityBozemanMTUSA
| | - Tom Livinghouse
- Chemistry and BiochemistryMontana State UniversityBozemanMTUSA
| | - Greg M. Durling
- Chemistry and BiochemistryMontana State UniversityBozemanMTUSA
| | - Adrienne D. Arnold
- Center for Biofilm EngineeringMontana State UniversityBozemanMTUSA
- Microbiology and ImmunologyMontana State UniversityBozemanMTUSA
| | - Whitney Brasier
- Center for Biofilm EngineeringMontana State UniversityBozemanMTUSA
| | - Luke Berry
- Chemistry and BiochemistryMontana State UniversityBozemanMTUSA
| | - Darla M. Goeres
- Center for Biofilm EngineeringMontana State UniversityBozemanMTUSA
| | | |
Collapse
|
57
|
You Z, Pearce DJG, Giomi L. Confinement-induced self-organization in growing bacterial colonies. SCIENCE ADVANCES 2021; 7:eabc8685. [PMID: 33523940 PMCID: PMC10670964 DOI: 10.1126/sciadv.abc8685] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 12/04/2020] [Indexed: 06/12/2023]
Abstract
We investigate the emergence of global alignment in colonies of dividing rod-shaped cells under confinement. Using molecular dynamics simulations and continuous modeling, we demonstrate that geometrical anisotropies in the confining environment give rise to an imbalance in the normal stresses, which, in turn, drives a collective rearrangement of the cells. This behavior crucially relies on the colony's solid-like mechanical response at short time scales and can be recovered within the framework of active hydrodynamics upon modeling bacterial colonies as growing viscoelastic gels characterized by Maxwell-like stress relaxation.
Collapse
Affiliation(s)
- Zhihong You
- Department of Physics, University of California, Santa Barbara, Santa Barbara, CA 93106, USA
- Instituut-Lorentz, Universiteit Leiden, P.O. Box 9506, 2300 RA Leiden, Netherlands
| | - Daniel J G Pearce
- Department of Theoretical Physics, Université de Genève, 1205 Genève, Switzerland
| | - Luca Giomi
- Instituut-Lorentz, Universiteit Leiden, P.O. Box 9506, 2300 RA Leiden, Netherlands.
| |
Collapse
|
58
|
Grobas I, Bazzoli DG, Asally M. Biofilm and swarming emergent behaviours controlled through the aid of biophysical understanding and tools. Biochem Soc Trans 2020; 48:2903-2913. [PMID: 33300966 PMCID: PMC7752047 DOI: 10.1042/bst20200972] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 10/28/2020] [Accepted: 10/29/2020] [Indexed: 02/06/2023]
Abstract
Bacteria can organise themselves into communities in the forms of biofilms and swarms. Through chemical and physical interactions between cells, these communities exhibit emergent properties that individual cells alone do not have. While bacterial communities have been mainly studied in the context of biochemistry and molecular biology, recent years have seen rapid advancements in the biophysical understanding of emergent phenomena through physical interactions in biofilms and swarms. Moreover, new technologies to control bacterial emergent behaviours by physical means are emerging in synthetic biology. Such technologies are particularly promising for developing engineered living materials (ELM) and devices and controlling contamination and biofouling. In this minireview, we overview recent studies unveiling physical and mechanical cues that trigger and affect swarming and biofilm development. In particular, we focus on cell shape, motion and density as the key parameters for mechanical cell-cell interactions within a community. We then showcase recent studies that use physical stimuli for patterning bacterial communities, altering collective behaviours and preventing biofilm formation. Finally, we discuss the future potential extension of biophysical and bioengineering research on microbial communities through computational modelling and deeper investigation of mechano-electrophysiological coupling.
Collapse
Affiliation(s)
- Iago Grobas
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, U.K
- Warwick Medical School, University of Warwick, Coventry CV4 7AL, U.K
| | - Dario G. Bazzoli
- School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, U.K
| | - Munehiro Asally
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, U.K
- Warwick Integrative Synthetic Biology Centre, University of Warwick, Coventry CV4 7AL, U.K
- Bio-Electrical Engineering Innovation Hub, University of Warwick, Coventry CV4 7AL, U.K
| |
Collapse
|
59
|
Monti D, Hubas C, Lourenço X, Begarin F, Haouisée A, Romana L, Lefrançois E, Jestin A, Budzinski H, Tapie N, Risser T, Mansot JL, Keith P, Gros O, Lopez PJ, Lauga B. Physical properties of epilithic river biofilm as a new lead to perform pollution bioassessments in overseas territories. Sci Rep 2020; 10:17309. [PMID: 33057038 PMCID: PMC7560750 DOI: 10.1038/s41598-020-73948-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 08/30/2020] [Indexed: 11/10/2022] Open
Abstract
Chlordecone (CLD) levels measured in the rivers of the French West Indies were among the highest values detected worldwide in freshwater ecosystems, and its contamination is recognised as a severe health, environmental, agricultural, economic, and social issue. In these tropical volcanic islands, rivers show strong originalities as simplified food webs, or numerous amphidromous migrating species, making the bioindication of contaminations a difficult issue. The objective of this study was to search for biological responses to CLD pollution in a spatially fixed and long-lasting component of the rivers in the West Indies: the epilithic biofilm. Physical properties were investigated through complementary analyses: friction, viscosity as well as surface adhesion were analyzed and coupled with measures of biofilm carbon content and exopolymeric substance (EPS) production. Our results have pointed out a mesoscale chemical and physical reactivity of the biofilm that can be correlated with CLD contamination. We were able to demonstrate that epilithic biofilm physical properties can effectively be used to infer freshwater environmental quality of French Antilles rivers. The friction coefficient is reactive to contamination and well correlated to carbon content and EPS production. Monitoring biofilm physical properties could offer many advantages to potential users in terms of effectiveness and ease of use, rather than more complex or time-consuming analyses.
Collapse
Affiliation(s)
- Dominique Monti
- UMR BOREA, UA-MNHN-SU-IRD-CNRS-UCN, Université des Antilles, BP 592, 97157, Pointe-à-Pitre, Guadeloupe, France.
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Université Des Antilles, MNHN, CNRS, SU, EPHE, BP 592, 97157, Pointe-à-Pitre, Guadeloupe, France.
| | - Cedric Hubas
- Muséum National D'Histoire Naturelle, UMR BOREA, MNHN-SU-IRD-CNRS-UCN-UA, Place de la croix, Station Marine de Concarneau, Concarneau, France
| | - Xavier Lourenço
- UMR BOREA, UA-MNHN-SU-IRD-CNRS-UCN, Université des Antilles, BP 592, 97157, Pointe-à-Pitre, Guadeloupe, France
| | - Farid Begarin
- C3MAG, UFR Des Sciences Exactes Et Naturelles, Université Des Antilles, BP 592, 97159, Pointe-à-Pitre, Guadeloupe, France
| | - Alexandre Haouisée
- UMR BOREA, UA-MNHN-SU-IRD-CNRS-UCN, Université des Antilles, BP 592, 97157, Pointe-à-Pitre, Guadeloupe, France
| | - Laurence Romana
- GTSI, département de Physique, Université des Antilles, BP 592, 97159, Pointe-à-Pitre Cedex, Guadeloupe, France
| | | | - Alexandra Jestin
- UPR 103 HORTSYS - CIRAD - Fonctionnement agroécologique Et Performances Des systèmes de Cultures Horticoles, Campus Agro-Environnemental Caraïbe, 97285, Le Lamentin, Martinique, France
| | - Hélène Budzinski
- UMR CNRS 5805 EPOC - OASU, Équipe LPTC, Université de Bordeaux, 351 Cours de la libération, 33405, Talence Cedex, France
| | - Nathalie Tapie
- UMR CNRS 5805 EPOC - OASU, Équipe LPTC, Université de Bordeaux, 351 Cours de la libération, 33405, Talence Cedex, France
| | - Théo Risser
- E2S UPPA, CNRS, IPREM, Universite de Pau Et Des Pays de L'Adour, BP 1155, 64013, Pau Cedex, France
| | - Jean-Louis Mansot
- C3MAG, UFR Des Sciences Exactes Et Naturelles, Université Des Antilles, BP 592, 97159, Pointe-à-Pitre, Guadeloupe, France
- GTSI, département de Physique, Université des Antilles, BP 592, 97159, Pointe-à-Pitre Cedex, Guadeloupe, France
| | - Philippe Keith
- Muséum National D'Histoire Naturelle, UMR BOREA, MNHN-SU-IRD-CNRS-UCN-UA, 57 rue Cuvier, CP26, 75231, Paris Cedex 05, France
| | - Olivier Gros
- C3MAG, UFR Des Sciences Exactes Et Naturelles, Université Des Antilles, BP 592, 97159, Pointe-à-Pitre, Guadeloupe, France
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Université Des Antilles, MNHN, CNRS, SU, EPHE, BP 592, 97157, Pointe-à-Pitre, Guadeloupe, France
| | - Pascal-Jean Lopez
- Muséum National D'Histoire Naturelle, UMR BOREA, MNHN-SU-IRD-CNRS-UCN-UA, 57 rue Cuvier, CP26, 75231, Paris Cedex 05, France
| | - Béatrice Lauga
- E2S UPPA, CNRS, IPREM, Universite de Pau Et Des Pays de L'Adour, BP 1155, 64013, Pau Cedex, France
| |
Collapse
|
60
|
THE INFLUENCE OF NANO-SILVER ON FORMATION OF MICROBIAL BIOFILMS IN CASES OF TRAUMATIC LESION OF THE AUXILIARY APPARATUS OF THE EYE. EUREKA: HEALTH SCIENCES 2020. [DOI: 10.21303/2504-5679.2020.001329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Pyoinflammatory complications remain an acute problem in the post-operative period of traumatic lesions of the auxiliary apparatus of the eye (AAE). Silver both in the ionic form and in composition of chemical compounds is highly toxic for microorganisms, and as a result, it shows bactericidal effect to many bacterial strains, including gram-negative microorganisms. The peculiarity of AgNPs is efficiency of influence on the wide array of microorganisms, significant anti-biofilm effect and absence of resistance reaction.
The aim of the research. To study the influence of the colloidal nano silver on formation of biofilms by microorganisms discharged from the wounds of patients with traumatic lesions of the auxiliary apparatus of the eye.
Materials and methods. During 2018-2019, we examined 60 patients with traumatic lesions of the auxiliary apparatus of the eye. For evaluation of the influence of colloid nano silver solution on the processes of formation of the biofilm, we selected microorganisms which were cultured most frequently (Staphylococcus aureus, Acinetobacter spp., Klebsiella ozenae) from the patients.
Results. The obtained data suggest that colloid nano silver inhibits efficiently formation of biofilms at the early stages (initiation, the 0 day of incubation) of their formation by all the three microorganisms, and the degree of inhibition of the biofilm formation did not depend on the silver concentration.
The effect of colloid silver in the concentrations used by us at later stages of biofilm formation (the 3rd and the 7th day) with respect to К. ozenae is less efficient – the growth of cell biomass was observed (p≤0.05), and it did not depend on the silver concentration. At the same time, the effect of the colloid nano silver on S. aureus and Acinetobacter spp. on the 3rd and the 7th days was more efficient than at the early stage (p≤0.05).
Conclusions. Nanoparticles of colloid silver are an efficient means to combat biofilms, as well as to prevent their formation.
Collapse
|