1
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Jandl B, Dighe S, Gasche C, Makristathis A, Muttenthaler M. Intestinal biofilms: pathophysiological relevance, host defense, and therapeutic opportunities. Clin Microbiol Rev 2024:e0013323. [PMID: 38995034 DOI: 10.1128/cmr.00133-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/13/2024] Open
Abstract
SUMMARYThe human intestinal tract harbors a profound variety of microorganisms that live in symbiosis with the host and each other. It is a complex and highly dynamic environment whose homeostasis directly relates to human health. Dysbiosis of the gut microbiota and polymicrobial biofilms have been associated with gastrointestinal diseases, including irritable bowel syndrome, inflammatory bowel diseases, and colorectal cancers. This review covers the molecular composition and organization of intestinal biofilms, mechanistic aspects of biofilm signaling networks for bacterial communication and behavior, and synergistic effects in polymicrobial biofilms. It further describes the clinical relevance and diseases associated with gut biofilms, the role of biofilms in antimicrobial resistance, and the intestinal host defense system and therapeutic strategies counteracting biofilms. Taken together, this review summarizes the latest knowledge and research on intestinal biofilms and their role in gut disorders and provides directions toward the development of biofilm-specific treatments.
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Affiliation(s)
- Bernhard Jandl
- Faculty of Chemistry, Institute of Biological Chemistry, University of Vienna, Vienna, Austria
- Vienna Doctoral School in Chemistry (DoSChem), University of Vienna, Vienna, Austria
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Satish Dighe
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
| | - Christoph Gasche
- Department of Internal Medicine, Division of Gastroenterology and Hepatology, Medical University of Vienna, Vienna, Austria
- Loha for Life, Center for Gastroenterology and Iron Deficiency, Vienna, Austria
| | - Athanasios Makristathis
- Department of Laboratory Medicine, Division of Clinical Microbiology, Medical University of Vienna, Vienna, Austria
| | - Markus Muttenthaler
- Faculty of Chemistry, Institute of Biological Chemistry, University of Vienna, Vienna, Austria
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia
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2
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Medhi R, Cintora A, Guazzelli E, Narayan N, Leonardi AK, Galli G, Oliva M, Pretti C, Finlay JA, Clare AS, Martinelli E, Ober CK. Nitroxide-Containing Amphiphilic Random Terpolymers for Marine Antifouling and Fouling-Release Coatings. ACS APPLIED MATERIALS & INTERFACES 2023; 15:11150-11162. [PMID: 36802475 DOI: 10.1021/acsami.2c23213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Two types of amphiphilic random terpolymers, poly(ethylene glycol methyl ether methacrylate)-ran-poly(2,2,6,6-tetramethylpiperidinyloxy methacrylate)-ran-poly(polydimethyl siloxane methacrylate) (PEGMEMA-r-PTMA-r-PDMSMA), were synthesized and evaluated for antifouling (AF) and fouling-release (FR) properties using diverse marine fouling organisms. In the first stage of production, the two respective precursor amine terpolymers containing (2,2,6,6-tetramethyl-4-piperidyl methacrylate) units (PEGMEMA-r-PTMPM-r-PDMSMA) were synthesized by atom transfer radical polymerization using various comonomer ratios and two initiators: alkyl halide and fluoroalkyl halide. In the second stage, these were selectively oxidized to introduce nitroxide radical functionalities. Finally, the terpolymers were incorporated into a PDMS host matrix to create coatings. AF and FR properties were examined using the alga Ulva linza, the barnacle Balanus improvisus, and the tubeworm Ficopomatus enigmaticus. The effects of comonomer ratios on surface properties and fouling assay results for each set of coatings are discussed in detail. There were marked differences in the effectiveness of these systems against the different fouling organisms. The terpolymers had distinct advantages over monopolymeric systems across the different organisms, and the nonfluorinated PEG and nitroxide combination was identified as the most effective formulation against B. improvisus and F. enigmaticus.
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Affiliation(s)
- Riddhiman Medhi
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Alicia Cintora
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Elisa Guazzelli
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Pisa 56124, Italy
| | - Nila Narayan
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Amanda K Leonardi
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Giancarlo Galli
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Pisa 56124, Italy
| | - Matteo Oliva
- Consorzio Interuniversitario di Biologia Marina e Ecologia Applicata "G. Bacci", Livorno 57128, Italy
| | - Carlo Pretti
- Consorzio Interuniversitario di Biologia Marina e Ecologia Applicata "G. Bacci", Livorno 57128, Italy
- Dipartimento di Scienze Veterinarie, Università di Pisa, Pisa 56124, Italy
| | - John A Finlay
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, U.K
| | - Anthony S Clare
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, U.K
| | - Elisa Martinelli
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Pisa 56124, Italy
| | - Christopher K Ober
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
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3
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Alzahrani AY, Ammar YA, Salem MA, Abu-Elghait M, Ragab A. Design, synthesis, molecular modeling, and antimicrobial potential of novel 3-[(1H-pyrazol-3-yl)imino]indolin-2-one derivatives as DNA gyrase inhibitors. Arch Pharm (Weinheim) 2021; 355:e2100266. [PMID: 34747519 DOI: 10.1002/ardp.202100266] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 10/20/2021] [Accepted: 10/21/2021] [Indexed: 12/11/2022]
Abstract
A series of 3-[(1H-pyrazol-3-yl)imino]indolin-2-one derivatives were designed using the molecular hybridization method, characterized using different spectroscopic techniques, and evaluated for their in vitro antimicrobial activity. Most of the target compounds demonstrated good to moderate antimicrobial activity compared with ciprofloxacin and fluconazole. Four compounds (8b, 9a, 9c, and 10a) showed encouraging results, with minimal inhibitory concentration (MIC) values (53.45-258.32 µM) comparable to those of norfloxacin (100.31-200.63 µM) and ciprofloxacin (48.33-96.68 µM). Noticeably, the four derivatives revealed excellent bactericidal and fungicidal activities, except for the bacteriostatic potential of compounds 8b and 9a against Escherichia coli and Staphylococcus aureus, respectively. The time-killing kinetic study against S. aureus confirmed the efficacy of these derivatives. Furthermore, two of the four promising derivatives, 9a and 10a, could prevent the formation of biofilms of S. aureus without affecting the bacterial growth at low concentrations. A combination study with seven commercial antibiotics against the multidrug-resistant bacterium P. aeruginosa showed a notable reduction in the antibiotic MIC values, represented mainly through a synergistic or additive effect. The enzymatic assay implied that the most active derivatives had inhibition potency against DNA gyrase comparable to that of ciprofloxacin. Molecular docking and density functional theory calculations were performed to explore the binding mode and study the reactivity of the promising compounds.
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Affiliation(s)
- Abdullah Y Alzahrani
- Department of Chemistry, Faculty of Science and Arts, King Khalid University, Mohail, Assir, Saudi Arabia
| | - Yousry A Ammar
- Department of Chemistry, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt
| | - Mohamed A Salem
- Department of Chemistry, Faculty of Science and Arts, King Khalid University, Mohail, Assir, Saudi Arabia.,Department of Chemistry, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt
| | - Mohammed Abu-Elghait
- Department of Botany and Microbiology, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt
| | - Ahmed Ragab
- Department of Chemistry, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt
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4
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Leonardi A, Zhang AC, Düzen N, Aldred N, Finlay JA, Clarke JL, Clare AS, Segalman RA, Ober CK. Amphiphilic Nitroxide-Bearing Siloxane-Based Block Copolymer Coatings for Enhanced Marine Fouling Release. ACS APPLIED MATERIALS & INTERFACES 2021; 13:28790-28801. [PMID: 34105932 DOI: 10.1021/acsami.1c05266] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The buildup of organic matter and organisms on surfaces exposed to marine environments, known as biofouling, is a disruptive and costly process affecting maritime operations. Previous research has identified some of the surface characteristics particularly suited to the creation of antifouling and fouling-release surfaces, but there remains room for improvement against both macrofouling and microfouling organisms. Characterization of their adhesives has shown that many rely on oxidative chemistries. In this work, we explore the incorporation of the stable radical 2,2,6,6-tetramethylpipiderin-1-oxyl (TEMPO) as a component in an amphiphilic block copolymer system to act as an inhibitor for marine cements, disrupting adhesion of macrofouling organisms. Using polystyrene-b-poly(dimethylsiloxane-r-vinylmethysiloxane) block copolymers, pendent vinyl groups were functionalized with TEMPO and poly(ethylene glycol) to construct an amphiphilic material with redox active character. The antifouling and fouling-release performance of these materials was investigated through settlement and removal assays of three model fouling organisms and correlated to surface structure and chemistry. Surfaces showed significant antifouling character and fouling-release performance was increased substantially toward barnacles by the incorporation of stable radicals, indicating their potential for marine antifouling applications.
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Affiliation(s)
- Amanda Leonardi
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Aria C Zhang
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Nilay Düzen
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Nick Aldred
- School of Life Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, United Kingdom
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom
| | - John A Finlay
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom
| | - Jessica L Clarke
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom
| | - Anthony S Clare
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom
| | - Rachel A Segalman
- Department of Chemical Engineering, University of California Santa Barbara, Santa Barbara, California 93110, United States
| | - Christopher K Ober
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
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5
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Chiarelli LR, Degiacomi G, Egorova A, Makarov V, Pasca MR. Nitric oxide-releasing compounds for the treatment of lung infections. Drug Discov Today 2020; 26:542-550. [PMID: 33181094 DOI: 10.1016/j.drudis.2020.10.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 10/01/2020] [Accepted: 10/28/2020] [Indexed: 12/12/2022]
Abstract
The spread of acquired drug resistance and of microorganisms naturally resistant to antibiotics is a major threat to global health, leading to an urgent need for novel antimicrobial compounds. Exogenous nitric oxide (NO) represents an attractive and promising antimicrobial approach, showing both bactericidal and biofilm dispersal activities. Numerous studies have been performed to develop NO donor scaffolds, including small molecules, macromolecular compounds, nanoparticles (NPs), and polymeric materials. This approach has resulted in successful outcomes, with some NO-releasing compounds entering clinical practice. In this review, we highlight the importance of this strategy, with a focus on lung infections.
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Affiliation(s)
- Laurent R Chiarelli
- Department of Biology and Biotechnology 'Lazzaro Spallanzani', University of Pavia, via Ferrata 9, 27100, Pavia, Italy
| | - Giulia Degiacomi
- Department of Biology and Biotechnology 'Lazzaro Spallanzani', University of Pavia, via Ferrata 9, 27100, Pavia, Italy
| | - Anna Egorova
- Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky Prospekt 33-2, 119071, Moscow, Russia
| | - Vadim Makarov
- Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky Prospekt 33-2, 119071, Moscow, Russia
| | - Maria Rosalia Pasca
- Department of Biology and Biotechnology 'Lazzaro Spallanzani', University of Pavia, via Ferrata 9, 27100, Pavia, Italy.
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6
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Bennai N, Chabrier A, Fatthalla MI, Tran C, Yen-Pon E, Belkadi M, Alami M, Grimaud L, Messaoudi S. Reversing Reactivity: Stereoselective Desulfurative 1,2- trans- O-Glycosylation of Anomeric Thiosugars with Carboxylic Acids under Copper or Cobalt Catalysis. J Org Chem 2020; 85:8893-8909. [PMID: 32524820 DOI: 10.1021/acs.joc.0c00766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have discovered a new mode of reactivity of 1-thiosugars in the presence of Cu(II) or Co(II) for a stereoselective O-glycosylation reaction. The process involves the use of a catalytic amount of Cu(acac)2 or Co(acac)2 and Ag2CO3 as an oxidant in α,α,α-trifluorotoluene. Moreover, this protocol turned out to have a broad scope, allowing the preparation of a wide range of complex substituted O-glycoside esters in good to excellent yields with an exclusive 1,2-trans-selectivity. The late-stage modification of pharmaceuticals by this method was also demonstrated. To obtain a closer insight into the reaction mechanism, cyclic voltammetry was performed.
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Affiliation(s)
- Nedjwa Bennai
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France.,Université des sciences et de la technologie d'Oran-Mohamed-Boudiaf, 31000 Bir El Djir, Algeria
| | - Amélie Chabrier
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France
| | - Maha I Fatthalla
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France.,Department of Chemistry, Faculty of Science, Helwan University, 11795 Ain Helwan, Cairo, Egypt
| | - Christine Tran
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France
| | - Expédite Yen-Pon
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France
| | - Mohamed Belkadi
- Université des sciences et de la technologie d'Oran-Mohamed-Boudiaf, 31000 Bir El Djir, Algeria
| | - Mouâd Alami
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France
| | - Laurence Grimaud
- Laboratoire des biomolécules (LBM), Sorbonne Université - Ecole Normale Supérieure - CNRS, 24 rue Lhomond, 75005 Paris, France
| | - Samir Messaoudi
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France
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7
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Michl TD, Tran DTT, Kuckling HF, Zhalgasbaikyzy A, Ivanovská B, González García LE, Visalakshan RM, Vasilev K. It takes two for chronic wounds to heal: dispersing bacterial biofilm and modulating inflammation with dual action plasma coatings. RSC Adv 2020; 10:7368-7376. [PMID: 35492196 PMCID: PMC9049834 DOI: 10.1039/c9ra09875e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 02/06/2020] [Indexed: 11/21/2022] Open
Abstract
Chronic wounds are affecting increasingly larger portions of the general population and their treatment has essentially remained unchanged for the past century. This lack of progress is due to the complex problem that chronic wounds are simultaneously infected and inflamed. Both aspects need to be addressed together to achieve a better healing outcome. Hence, we hereby demonstrate that the stable nitroxide radical (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO) can be plasma polymerized into smooth coatings (TEMPOpp), as seen via atomic force microscopy, X-ray photoelectron spectroscopy and ellipsometry. Upon contact with water, these coatings leach nitroxides into aqueous supernatant, as measured via EPR. We then exploited the known cell-signalling qualities of TEMPO to change the cellular behaviour of bacteria and human cells that come into contact with the surfaces. Specifically, the TEMPOpp coatings not only suppressed biofilm formation of the opportunistic bacterium Staphylococcus epidermidis but also dispersed already formed biofilm in a dose-dependent manner; a crucial aspect in treating chronic wounds that contain bacterial biofilm. Thus the coatings' microbiological efficacy correlated with their thickness and the thickest coating was the most efficient. Furthermore, this dose-dependent effect was mirrored in significant cytokine reduction of activated THP-1 macrophages for the four cytokines TNF-α, IL-1β, IL-6 and IP-10. At the same time, the THP-1 cells retained their ability to adhere and colonize the surfaces, as verified via SEM imaging. Thus, summarily, we have exploited the unique qualities of plasma polymerized TEMPO coatings in targeting both infection and inflammation simultaneously; demonstrating a novel alternative to how chronic wounds could be treated in the future. We plasma polymerized the stable nitroxide radical TEMPO into thin coatings and exploited the coatings' unique qualities in targeting both infection and inflammation simultaneously; demonstrating a novel alternative as to how chronic wounds could be treated in the future.![]()
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Affiliation(s)
| | | | | | | | - Barbora Ivanovská
- School of Engineering
- University of South Australia
- Mawson Lakes
- Australia
| | | | | | - Krasimir Vasilev
- School of Engineering
- University of South Australia
- Mawson Lakes
- Australia
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8
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Verderosa AD, Dhouib R, Fairfull-Smith KE, Totsika M. Nitroxide Functionalized Antibiotics Are Promising Eradication Agents against Staphylococcus aureus Biofilms. Antimicrob Agents Chemother 2019; 64:e01685-19. [PMID: 31636066 PMCID: PMC7187575 DOI: 10.1128/aac.01685-19] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 10/09/2019] [Indexed: 01/10/2023] Open
Abstract
Treatment of biofilm-related Staphylococcus aureus infections represents an important medical challenge worldwide, as biofilms, even those involving drug-susceptible S. aureus strains, are highly refractory to conventional antibiotic therapy. Nitroxides were recently shown to induce the dispersal of Gram-negative biofilms in vitro, but their action against Gram-positive bacterial biofilms remains unknown. Here, we demonstrate that the biofilm dispersal activity of nitroxides extends to S. aureus, a clinically important Gram-positive pathogen. Coadministration of the nitroxide CTEMPO (4-carboxy-2,2,6,6-tetramethylpiperidin-1-yloxyl) with ciprofloxacin significantly improved the biofilm eradication activity of the antibiotic against S. aureus Moreover, covalently linking the nitroxide to the antibiotic moiety further reduced the ciprofloxacin minimal biofilm eradication concentration. Microscopy analysis revealed that fluorescent nitroxide-antibiotic hybrids could penetrate S. aureus biofilms and enter cells localized at the surface and base of the biofilm structure. No toxicity to human cells was observed for the nitroxide CTEMPO or the nitroxide-antibiotic hybrids. Taken together, our results show that nitroxides can mediate the dispersal of Gram-positive biofilms and that dual-acting biofilm eradication antibiotics may provide broad-spectrum therapies for the treatment of biofilm-related infections.
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Affiliation(s)
- Anthony D Verderosa
- School of Chemistry, Physics, and Mechanical Engineering, Queensland University of Technology, Brisbane, Queensland, Australia
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
- School of Biomedical Sciences, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Rabeb Dhouib
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
- School of Biomedical Sciences, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Kathryn E Fairfull-Smith
- School of Chemistry, Physics, and Mechanical Engineering, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Makrina Totsika
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Queensland, Australia
- School of Biomedical Sciences, Queensland University of Technology, Brisbane, Queensland, Australia
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9
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Woehlk H, Trimble MJ, Mansour SC, Pletzer D, Trouillet V, Welle A, Barner L, Hancock REW, Barner-Kowollik C, Fairfull-Smith KE. Controlling biofilm formation with nitroxide functional surfaces. Polym Chem 2019. [DOI: 10.1039/c9py00690g] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Nitroxide functional polymer coatings with inherent antibiofilm activity are introduced as an avenue to combat bacterial biofilm contamination of medical devices.
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10
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Orlandi VT, Bolognese F, Rolando B, Guglielmo S, Lazzarato L, Fruttero R. Anti-Pseudomonas activity of 3-nitro-4-phenylfuroxan. MICROBIOLOGY-SGM 2018; 164:1557-1566. [PMID: 30300122 DOI: 10.1099/mic.0.000730] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Pseudomonas aeruginosa is a microorganism that is well adapted to both clinical and industrial settings, where it can form adherent communities that are difficult to eradicate. New anti-Pseudomonas compounds and strategies are necessary, as the current antimicrobial approaches for the inhibition of biofilm formation and, above all, the eradication of formed biofilms are ineffective. Compounds that belong to the furoxan family, which are well-known NO donors, have recently been shown to display anti-Pseudomonas activity. The present study investigates three furoxan compounds that are substituted at the hetero-ring with electron-withdrawing groups (NO2, CN, CONH2) for their effects on P. aeruginosa PAO1 growth and biofilm formation/dispersal. Of the furoxans tested, only 3-nitro-4-phenylfuroxan (KN455) inhibited the growth of suspended P. aeruginosa PAO1 cultures. Furthermore, KN455 inhibited the formation of both younger and older biofilms with very high yields and thus proved itself to be toxic to planktonic subpopulations. It also displayed moderate eradicating power. The activity of KN455 does not appear to be related to its capacity to release small amounts of NO. Interestingly, the isomer 4-nitro-3-phenylfuroxan (KN454), included for comparison, displayed a comparable antibiofilm rate, but did not show the same antimicrobial activity against suspended cells and planktonic subpopulations. While hypotheses as to the mechanism of action have been formulated, further investigations are necessary to shed light onto the antimicrobial activity of this furoxan.
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Affiliation(s)
- Viviana Teresa Orlandi
- 1Dipartimento di Biotecnologie e Scienze della Vita, Università degli Studi dell'Insubria, Varese, Italy
| | - Fabrizio Bolognese
- 1Dipartimento di Biotecnologie e Scienze della Vita, Università degli Studi dell'Insubria, Varese, Italy
| | - Barbara Rolando
- 2Dipartimento di Scienza e Tecnologia del Farmaco, Università degli Studi di Torino, Turin, Italy
| | - Stefano Guglielmo
- 2Dipartimento di Scienza e Tecnologia del Farmaco, Università degli Studi di Torino, Turin, Italy
| | - Loretta Lazzarato
- 2Dipartimento di Scienza e Tecnologia del Farmaco, Università degli Studi di Torino, Turin, Italy
| | - Roberta Fruttero
- 2Dipartimento di Scienza e Tecnologia del Farmaco, Università degli Studi di Torino, Turin, Italy
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11
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Cattò C, Villa F, Cappitelli F. Recent progress in bio-inspired biofilm-resistant polymeric surfaces. Crit Rev Microbiol 2018; 44:633-652. [DOI: 10.1080/1040841x.2018.1489369] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Cristina Cattò
- Department of Food Environmental and Nutritional Sciences, Università degli Studi di Milano, Milano, Italy
| | - Federica Villa
- Department of Food Environmental and Nutritional Sciences, Università degli Studi di Milano, Milano, Italy
| | - Francesca Cappitelli
- Department of Food Environmental and Nutritional Sciences, Università degli Studi di Milano, Milano, Italy
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12
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Woehlk H, Steinkoenig J, Lang C, Michalek L, Trouillet V, Krolla P, Goldmann AS, Barner L, Blinco JP, Barner-Kowollik C, Fairfull-Smith KE. Engineering Nitroxide Functional Surfaces Using Bioinspired Adhesion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:3264-3274. [PMID: 29442516 DOI: 10.1021/acs.langmuir.7b03755] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We pioneer a versatile surface modification strategy based on mussel-inspired oxidative catecholamine polymerization for the design of nitroxide-containing thin polymer films. A 3,4-dihydroxy-l-phenylalanine (l-DOPA) monomer equipped with a 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-derived oxidation-labile hydroxylamine functional group is employed as a universal coating agent to generate polymer scaffolds with persistent radical character. Various types of materials including silicon, titanium, ceramic alumina, and inert poly(tetrafluoroethylene) (PTFE) were successfully coated with poly(DOPA-TEMPO) thin films in a one-step dip-coating procedure under aerobic, slightly alkaline (pH 8.5) conditions. Steadily growing polymer films (∼1.1 nm h-1) were monitored by ellipsometry, and their thicknesses were critically compared with those obtained from atomic force microscopic cross-sectional profiles. The heterogeneous composition of surface-adherent nitroxide scaffolds examined by X-ray photoelectron spectroscopy was correlated to that examined by in-solution polymer analysis via high-resolution electrospray ionization mass spectrometry, revealing oligomeric structures with up to six repeating units, mainly composed of covalently linked dihydroxyindole along the polymer backbone. Critically, the reversible redox-active character of the nitroxide-containing polymer scaffolds was investigated by cyclic voltammetric measurements, revealing a convenient and facile access route to electrochemically active nitroxide polymer coatings with potential application in electronic devices such as organic radical batteries.
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Affiliation(s)
- Hendrik Woehlk
- Macromolecular Architectures, Institute for Chemical Technology and Polymer Chemistry , Karlsruhe Institute of Technology (KIT) , Engesserstr. 18 , 76128 Karlsruhe , Germany
| | - Jan Steinkoenig
- Macromolecular Architectures, Institute for Chemical Technology and Polymer Chemistry , Karlsruhe Institute of Technology (KIT) , Engesserstr. 18 , 76128 Karlsruhe , Germany
| | | | | | | | | | - Anja S Goldmann
- Macromolecular Architectures, Institute for Chemical Technology and Polymer Chemistry , Karlsruhe Institute of Technology (KIT) , Engesserstr. 18 , 76128 Karlsruhe , Germany
| | | | - James P Blinco
- Macromolecular Architectures, Institute for Chemical Technology and Polymer Chemistry , Karlsruhe Institute of Technology (KIT) , Engesserstr. 18 , 76128 Karlsruhe , Germany
| | - Christopher Barner-Kowollik
- Macromolecular Architectures, Institute for Chemical Technology and Polymer Chemistry , Karlsruhe Institute of Technology (KIT) , Engesserstr. 18 , 76128 Karlsruhe , Germany
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13
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Boase NRB, Torres MDT, Fletcher NL, de la Fuente-Nunez C, Fairfull-Smith KE. Polynitroxide copolymers to reduce biofilm fouling on surfaces. Polym Chem 2018. [DOI: 10.1039/c8py01101j] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Polynitroxide films – the first example of surface tethered nitroxides reducing biofilm fouling.
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Affiliation(s)
- Nathan R. B. Boase
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - Marcelo D. T. Torres
- Synthetic Biology Group
- MIT Synthetic Biology Center
- Department of Biological Engineering and Electrical Engineering & Computer Science
- Research Laboratory of Electronics
- Massachusetts Institute of Technology
| | - Nicholas L. Fletcher
- Centre for Advanced Imaging
- University of Queensland
- St Lucia
- Australia
- Australian Institute for Bioengineering and Nanotechnology
| | - Cesar de la Fuente-Nunez
- Synthetic Biology Group
- MIT Synthetic Biology Center
- Department of Biological Engineering and Electrical Engineering & Computer Science
- Research Laboratory of Electronics
- Massachusetts Institute of Technology
| | - Kathryn E. Fairfull-Smith
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
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14
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Lang C, Barner L, Blinco JP, Barner-Kowollik C, Fairfull-Smith KE. Direct access to biocompatible nitroxide containing polymers. Polym Chem 2018. [DOI: 10.1039/c8py00089a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Ring-opening copolymerization of a nitroxide containing cyclic carbonate and d/l-lactide was used to directly access well-defined biocompatible polymers.
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Affiliation(s)
- Christiane Lang
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - Leonie Barner
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - James P. Blinco
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - Christopher Barner-Kowollik
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - Kathryn E. Fairfull-Smith
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
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15
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Verderosa AD, de la Fuente-Núñez C, Mansour SC, Cao J, Lu TK, Hancock REW, Fairfull-Smith KE. Ciprofloxacin-nitroxide hybrids with potential for biofilm control. Eur J Med Chem 2017; 138:590-601. [PMID: 28709125 DOI: 10.1016/j.ejmech.2017.06.058] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 06/26/2017] [Accepted: 06/27/2017] [Indexed: 01/15/2023]
Abstract
As bacterial biofilms display extreme tolerance to conventional antibiotic treatments, it has become imperative to develop new antibacterial strategies with alternative mechanisms of action. Herein, we report the synthesis of a series of ciprofloxacin-nitroxide conjugates and their corresponding methoxyamine derivatives in high yield. This was achieved by linking various nitroxides or methoxyamines to the secondary amine of the piperazine ring of ciprofloxacin using amide bond coupling. Biological evaluation of the prepared compounds on preformed P. aeruginosa biofilms in flow cells revealed substantial dispersal with ciprofloxacin-nitroxide hybrid 25, and virtually complete killing and removal (94%) of established biofilms in the presence of ciprofloxacin-nitroxide hybrid 27. Compounds 25-28 were shown to be non-toxic in both human embryonic kidney 293 (HEK 293) cells and human muscle rhabdomyosarcoma (RD) cells at concentrations up to 40 μM. Significantly, these hybrids demonstrate the potential of antimicrobial-nitroxide agents to overcome the resistance of biofilms to antimicrobials via stimulation of biofilm dispersal or through direct cell killing.
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Affiliation(s)
- Anthony D Verderosa
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology, Faculty of Science and Engineering, Queensland University of Technology, Queensland 4001, Australia
| | - César de la Fuente-Núñez
- Synthetic Biology Group, MIT Synthetic Biology Center, Massachusetts Institute of Technology, Cambridge, MA, United States; Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, United States; Department of Biological Engineering, Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, United States; Broad Institute of MIT and Harvard, Cambridge, MA, United States; Harvard Biophysics Program, Harvard University, Boston, MA, United States; The Center for Microbiome Informatics and Therapeutics, Cambridge, MA, United States
| | - Sarah C Mansour
- Centre for Microbial Diseases and Immunity Research, Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Jicong Cao
- Synthetic Biology Group, MIT Synthetic Biology Center, Massachusetts Institute of Technology, Cambridge, MA, United States; Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, United States; Department of Biological Engineering, Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, United States; Broad Institute of MIT and Harvard, Cambridge, MA, United States; Harvard Biophysics Program, Harvard University, Boston, MA, United States; The Center for Microbiome Informatics and Therapeutics, Cambridge, MA, United States
| | - Timothy K Lu
- Synthetic Biology Group, MIT Synthetic Biology Center, Massachusetts Institute of Technology, Cambridge, MA, United States; Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, United States; Department of Biological Engineering, Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, United States; Broad Institute of MIT and Harvard, Cambridge, MA, United States; Harvard Biophysics Program, Harvard University, Boston, MA, United States; The Center for Microbiome Informatics and Therapeutics, Cambridge, MA, United States
| | - Robert E W Hancock
- Centre for Microbial Diseases and Immunity Research, Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Kathryn E Fairfull-Smith
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology, Faculty of Science and Engineering, Queensland University of Technology, Queensland 4001, Australia.
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16
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Ren H, Wu J, Colletta A, Meyerhoff ME, Xi C. Efficient Eradication of Mature Pseudomonas aeruginosa Biofilm via Controlled Delivery of Nitric Oxide Combined with Antimicrobial Peptide and Antibiotics. Front Microbiol 2016; 7:1260. [PMID: 27582732 PMCID: PMC4988120 DOI: 10.3389/fmicb.2016.01260] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Accepted: 07/29/2016] [Indexed: 02/05/2023] Open
Abstract
Fast eradication of mature biofilms is the ‘holy grail’ in the clinical management of device-related infections. Endogenous nitric oxide (NO) produced by macrophages plays an important role in host defense against intracellular pathogens, and NO is a promising agent in preventing biofilms formation in vitro. However, the rate of delivery of NO by various NO donors (e.g., diazeniumdiolates, S-nitrosothiols, etc.) is difficult to control, which hinders fundamental studies aimed at understanding the role of NO in biofilm control. In this study, by using a novel precisely controlled electrochemical NO releasing catheter device, we examine the effect of physiological levels of NO on eradicating mature Pseudomonas aeruginosa biofilm (7 days), as well as the potential application of the combination of NO with antimicrobial agents. It is shown that physiological levels of NO exhibit mixed effects of killing bacteria and dispersing ambient biofilm. The overall biofilm-eradicating effect of NO is quite efficient in a dose-dependent manner over a 3 h period of NO treatment. Moreover, NO also greatly enhances the efficacy of antimicrobial agents, including human beta-defensin 2 (BD-2) and several antibiotics, in eradicating biofilm and its detached cells, which otherwise exhibited high recalcitrance to these antimicrobial agents. The electrochemical NO release technology offers a powerful tool in evaluating the role of NO in biofilm control as well as a promising approach when combined with antimicrobial agents to treat biofilm-associated infections in hospital settings, especially infections resulting from intravascular catheters.
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Affiliation(s)
- Hang Ren
- Department of Chemistry, University of Michigan, Ann Arbor, MI USA
| | - Jianfeng Wu
- Department of Environmental Health Sciences, School of Public Health, University of Michigan, Ann Arbor, MI USA
| | | | - Mark E Meyerhoff
- Department of Chemistry, University of Michigan, Ann Arbor, MI USA
| | - Chuanwu Xi
- Department of Environmental Health Sciences, School of Public Health, University of Michigan, Ann Arbor, MI USA
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17
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Synthesis and Evaluation of Ciprofloxacin-Nitroxide Conjugates as Anti-Biofilm Agents. Molecules 2016; 21:molecules21070841. [PMID: 27355936 PMCID: PMC6273952 DOI: 10.3390/molecules21070841] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 06/17/2016] [Accepted: 06/21/2016] [Indexed: 12/14/2022] Open
Abstract
As bacterial biofilms are often refractory to conventional antimicrobials, the need for alternative and/or novel strategies for the treatment of biofilm related infections has become of paramount importance. Herein, we report the synthesis of novel hybrid molecules comprised of two different hindered nitroxides linked to the piperazinyl secondary amine of ciprofloxacin via a tertiary amine linker achieved utilising reductive amination. The corresponding methoxyamine derivatives were prepared alongside their radical-containing counterparts as controls. Subsequent biological evaluation of the hybrid compounds on preformed P. aeruginosa flow cell biofilms divulged significant dispersal and eradication abilities for ciprofloxacin-nitroxide hybrid compound 10 (up to 95% eradication of mature biofilms at 40 μM). Importantly, these hybrids represent the first dual-action antimicrobial-nitroxide agents, which harness the dispersal properties of the nitroxide moiety to circumvent the well-known resistance of biofilms to treatment with antimicrobial agents.
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18
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Barzegar Amiri Olia M, Zavras A, Schiesser CH, Alexander SA. Blue ‘turn-on’ fluorescent probes for the direct detection of free radicals and nitric oxide in Pseudomonas aeruginosa biofilms. Org Biomol Chem 2016; 14:2272-81. [DOI: 10.1039/c5ob02441b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Novel blue cell-permeable ‘turn-on’ fluorescent probes have been developed to visualize and quantify nitric oxide and free radical formation and reaction within aPseudomonas aeruginosabiofilm.
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Affiliation(s)
- Mina Barzegar Amiri Olia
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology
- Australia
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute
- The University of Melbourne
- Victoria
| | - Athanasios Zavras
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology
- Australia
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute
- The University of Melbourne
- Victoria
| | - Carl H. Schiesser
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology
- Australia
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute
- The University of Melbourne
- Victoria
| | - Stefanie-Ann Alexander
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology
- Australia
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute
- The University of Melbourne
- Victoria
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19
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Krylov IB, Kompanets MO, Novikova KV, Opeida IO, Kushch OV, Shelimov BN, Nikishin GI, Levitsky DO, Terent’ev AO. Well-Known Mediators of Selective Oxidation with Unknown Electronic Structure: Metal-Free Generation and EPR Study of Imide-N-oxyl Radicals. J Phys Chem A 2015; 120:68-73. [DOI: 10.1021/acs.jpca.5b10722] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Igor B. Krylov
- N.
D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Leninsky Prospekt 47, Moscow, Russian Federation
| | - Mykhailo O. Kompanets
- Department
of Physical Chemistry of Fossil Fuels In POCC, National Academy of Sciences of Ukraine Naukova st. 3a, Lviv 79053, Ukraine
| | - Katerina V. Novikova
- Department
of Physical Chemistry of Fossil Fuels In POCC, National Academy of Sciences of Ukraine Naukova st. 3a, Lviv 79053, Ukraine
| | - Iosip O. Opeida
- Department
of Physical Chemistry of Fossil Fuels In POCC, National Academy of Sciences of Ukraine Naukova st. 3a, Lviv 79053, Ukraine
| | - Olga V. Kushch
- Department
of Physical Chemistry of Fossil Fuels In POCC, National Academy of Sciences of Ukraine Naukova st. 3a, Lviv 79053, Ukraine
| | - Boris N. Shelimov
- N.
D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Leninsky Prospekt 47, Moscow, Russian Federation
| | - Gennady I. Nikishin
- N.
D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Leninsky Prospekt 47, Moscow, Russian Federation
| | - Dmitri O. Levitsky
- UFIP
CNRS UMR 6286, Mechanism and regulation of DNA repair team, Université de Nantes, 2 rue de la Houssinière, 44322, Nantes, France
| | - Alexander O. Terent’ev
- N.
D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Leninsky Prospekt 47, Moscow, Russian Federation
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