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Schmitz MGJ, Aarts JGM, Burroughs L, Sudarsanam P, Kuijpers TJM, Riool M, de Boer L, Xue X, Bosnacki D, Zaat SAJ, de Boer J, Alexander MR, Dankers PYW. Merging Modular Molecular Design with High Throughput Screening of Cell Adhesion on Antimicrobial Supramolecular Biomaterials. Macromol Rapid Commun 2024:e2300638. [PMID: 38530968 DOI: 10.1002/marc.202300638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 03/05/2024] [Indexed: 03/28/2024]
Abstract
A polymer microarray based on the supramolecular ureido-pyrimidinone (UPy) moiety is fabricated to screen antimicrobial materials for their ability to support cell adhesion. UPy-functionalized additives, either cell-adhesive, antimicrobial or control peptides, are used, and investigated in different combinations at different concentrations, resulting in a library of 194 spots. These are characterized on composition and morphology to evaluate the microarray fabrication. Normal human dermal fibroblasts are cultured on the microarrays and cell adhesion to the spots is systematically analyzed. Results demonstrate enhanced cell adhesion on spots with combinations including the antimicrobial peptides. This study clearly proves the power of the high throughput approach in combination with supramolecular molecules, to screen additive libraries for desired biological response.
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Affiliation(s)
- Moniek G J Schmitz
- Department of Biomedical Engineering, Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, PO Box 513, Eindhoven, 5600 MB, The Netherlands
| | - Jasper G M Aarts
- Department of Biomedical Engineering, Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, PO Box 513, Eindhoven, 5600 MB, The Netherlands
| | - Laurence Burroughs
- School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Phanikrishna Sudarsanam
- Department of Biomedical Engineering, Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, PO Box 513, Eindhoven, 5600 MB, The Netherlands
| | - Tim J M Kuijpers
- Department of Biomedical Engineering, Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, PO Box 513, Eindhoven, 5600 MB, The Netherlands
| | - Martijn Riool
- Department of Medical Microbiology and Infection Prevention, Amsterdam institute for Infection and Immunity, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, 1105 AZ, The Netherlands
| | - Leonie de Boer
- Department of Medical Microbiology and Infection Prevention, Amsterdam institute for Infection and Immunity, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, 1105 AZ, The Netherlands
| | - Xuan Xue
- School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Dragan Bosnacki
- Department of Biomedical Engineering, Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, PO Box 513, Eindhoven, 5600 MB, The Netherlands
| | - Sebastian A J Zaat
- Department of Medical Microbiology and Infection Prevention, Amsterdam institute for Infection and Immunity, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, 1105 AZ, The Netherlands
| | - Jan de Boer
- Department of Biomedical Engineering, Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, PO Box 513, Eindhoven, 5600 MB, The Netherlands
| | - Morgan R Alexander
- School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Patricia Y W Dankers
- Department of Biomedical Engineering, Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, PO Box 513, Eindhoven, 5600 MB, The Netherlands
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Hofstee MI, Siverino C, Saito M, Meghwani H, Tapia-Dean J, Arveladze S, Hildebrand M, Rangel-Moreno J, Riool M, Zeiter S, Zaat SAJ, Moriarty TF, Muthukrishnan G. Staphylococcus aureus Panton-Valentine Leukocidin worsens acute implant-associated osteomyelitis in humanized BRGSF mice. JBMR Plus 2024; 8:ziad005. [PMID: 38505530 PMCID: PMC10945728 DOI: 10.1093/jbmrpl/ziad005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/21/2024] Open
Abstract
Staphylococcus aureus is the most common pathogen that causes implant-associated osteomyelitis, a clinically incurable disease. Immune evasion of S. aureus relies on various mechanisms to survive within the bone niche, including the secretion of leukotoxins such as Panton-Valentine leukocidin (PVL). PVL is a pore-forming toxin exhibiting selective human tropism for C5a receptors (C5aR1 and C5aR2) and CD45 on neutrophils, monocytes, and macrophages. PVL is an important virulence determinant in lung, skin and soft tissue infections. The involvement of PVL in S. aureus pathogenesis during bone infections has not been studied extensively yet. To investigate this, humanized BALB/c Rag2-/-Il2rg-/-SirpaNODFlk2-/- (huBRGSF) mice were subjected to transtibial implant-associated osteomyelitis with community-acquired methicillin-resistant S. aureus (CA-MRSA) USA300 wild type strain (WT), an isogenic mutant lacking lukF/S-PV (Δpvl), or complemented mutant (Δpvl+pvl). Three days post-surgery, Δpvl-infected huBRGSF mice had a less severe infection compared to WT-infected animals as characterized by 1) improved clinical outcomes, 2) lower ex vivo bacterial bone burden, 3) absence of staphylococcal abscess communities (SACs) in their bone marrow, and 4) compromised MRSA dissemination to internal organs (liver, kidney, spleen, heart). Interestingly, Δpvl-infected huBRGSF mice had fewer human myeloid cells, neutrophils, and HLA-DR+ monocytes in the bone niche compared to WT-infected animals. Expectedly, a smaller fraction of human myeloid cells were apoptotic in the Δpvl-infected huBRGSF animals. Taken together, our study highlights the pivotal role of PVL during acute implant-associated osteomyelitis in humanized mice.
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Affiliation(s)
- Marloes I Hofstee
- AO Research Institute Davos, 7270 Davos, Switzerland
- Department of Medical Microbiology and Infection Prevention, Amsterdam UMC, Amsterdam institute for Infection and Immunity, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | | | - Motoo Saito
- Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, NY 14642, United States
- Department of Orthopaedics and Rehabilitation, University of Rochester Medical Center, Rochester, NY 14618, United States
| | - Himanshu Meghwani
- Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, NY 14642, United States
- Department of Orthopaedics and Rehabilitation, University of Rochester Medical Center, Rochester, NY 14618, United States
| | | | | | | | - Javier Rangel-Moreno
- Division of Allergy, Immunology and Rheumatology, Department of Medicine, University of Rochester Medical Center, Rochester, NY 14620, United States
| | - Martijn Riool
- Department of Medical Microbiology and Infection Prevention, Amsterdam UMC, Amsterdam institute for Infection and Immunity, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
- Department of Trauma Surgery, University Hospital Regensburg, 93053 Regensburg, Germany
| | | | - Sebastian A J Zaat
- Department of Medical Microbiology and Infection Prevention, Amsterdam UMC, Amsterdam institute for Infection and Immunity, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | | | - Gowrishankar Muthukrishnan
- Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, NY 14642, United States
- Department of Orthopaedics and Rehabilitation, University of Rochester Medical Center, Rochester, NY 14618, United States
- Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, NY 14642, United States
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Mannala GK, Rupp M, Walter N, Scholz KJ, Simon M, Riool M, Alt V. Galleria mellonella as an alternative in vivo model to study implant-associated fungal infections. J Orthop Res 2023; 41:2547-2559. [PMID: 37080929 DOI: 10.1002/jor.25572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 03/22/2023] [Accepted: 04/17/2023] [Indexed: 04/22/2023]
Abstract
Fungal implant-associated bone infections are rare but difficult to treat and often associated with a poor outcome for patients. Candida species account for approximately 90% of all fungal infections. In vivo biofilm models play a major role to study biofilm development and potential new treatment options; however, there are only a very few in vivo models to study fungi-associated biofilms. Furthermore, mammalian infection models are replaced more and more due to ethical restrictions with other alternative models in basic research. Recently, we developed an insect infection model with Galleria mellonella larvae to study biofilm-associated infections with bacteria. Here, we further expanded the G. mellonella model to study in vivo fungal infections using Candida albicans and Candida krusei. We established a planktonic and biofilm-implant model to test different antifungal medication with amphotericin B, fluconazole, and voriconazole against the two species and assessed the fungal biofilm-load on the implant surface. Planktonic infection with C. albicans and C. krusei showed the killing of the G. mellonella larvae at 5 × 105 colony forming units (CFU). Treatment of larvae with antifungal compounds with amphotericin B and fluconazole showed significant survival improvement against planktonic C. albicans infection, but voriconazole had no effect. Titanium and stainless steel K-wires were preincubated with C. albicans and implanted inside the larvae to induce biofilm infection on the implant surface. The survival analysis revealed significantly reduced survival of the larvae with Candida spp. infection compared to noninfected implants. The treatment with antifungal amphotericin B and fluconazole resulted in a slight and nonsignificant improvement survival of the larvae. The treatment with the antifungal compounds in the biofilm-infection model was not as effective as in the planktonic infection model, which highlights the resistance of fungal biofilms to antifungal compounds like in bacterial biofilms. Scanning electron microscopy (SEM) analysis revealed the formation of a fungal biofilm with hyphae and spores associated with larvae tissue on the implant surface. Thus, our study highlights the use of G. mellonella larvae as alternative in vivo model to study biofilm-associated implant fungal infections and that fungal biofilms exhibit high resistance profiles comparable to bacterial biofilms. The model can be used in the future to test antifungal treatment options for fungal biofilm infections.
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Affiliation(s)
- Gopala K Mannala
- Department of Trauma Surgery, University Hospital Regensburg, Regensburg, Germany
| | - Markus Rupp
- Department of Trauma Surgery, University Hospital Regensburg, Regensburg, Germany
| | - Nike Walter
- Department of Trauma Surgery, University Hospital Regensburg, Regensburg, Germany
| | - Konstantin J Scholz
- Department of Conservative Dentistry and Periodontology, University Hospital Regensburg, Regensburg, Germany
| | - Michaela Simon
- Institute of Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany
| | - Martijn Riool
- Department of Trauma Surgery, University Hospital Regensburg, Regensburg, Germany
| | - Volker Alt
- Department of Trauma Surgery, University Hospital Regensburg, Regensburg, Germany
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Guarch-Pérez C, Riool M, de Boer L, Kloen P, Zaat SAJ. Bacterial reservoir in deeper skin is a potential source for surgical site and biomaterial-associated infections. J Hosp Infect 2023; 140:62-71. [PMID: 37544367 DOI: 10.1016/j.jhin.2023.07.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 07/22/2023] [Accepted: 07/24/2023] [Indexed: 08/08/2023]
Abstract
BACKGROUND The origin of surgical site and biomaterial-associated infection is still elusive. Micro-organisms contaminating the wound may come from the air in the operating theatre, the surgical team or the skin of the patient. The skin of patients is disinfected prior to surgery, but bacteria deeper in the skin (e.g. in sweat glands or sebaceous glands) may not be reached. METHODS A preliminary cohort study was performed to study the origin of surgical site and biomaterial-associated infection between May 2020 and February 2021. In order to investigate whether cutaneous microbiota colonize the wound when released from the skin upon cutting, aerobic and anaerobic bacteria were isolated, quantified and identified from the skin of 99 patients undergoing trauma surgery, before and after skin disinfection, from knife blades and from the wound directly after the first cut. RESULTS Ninety-nine percent of the patients were culture-positive before disinfection with chlorhexidine. Of these, 40% were still culture-positive after disinfection. Of these, 54% had a positive culture of the wound after cutting the skin. Twenty percent of the patients with a negative culture after disinfection had a positive wound culture after cutting the skin. Staphylococcus epidermidis and Cutibacterium acnes were the most commonly cultured bacterial species. In 9% of cases, more than 100 bacterial colonies were cultured from the wound; this may cause biomaterial-associated infection. CONCLUSION Bacteria residing in the skin and not eradicated by disinfection may enter the surgical wound upon cutting, resulting in contamination which may cause biomaterial-associated infection.
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Affiliation(s)
- C Guarch-Pérez
- Department of Medical Microbiology and Infection Prevention, Amsterdam Institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - M Riool
- Department of Medical Microbiology and Infection Prevention, Amsterdam Institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - L de Boer
- Department of Medical Microbiology and Infection Prevention, Amsterdam Institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - P Kloen
- Department of Orthopaedic Surgery and Sports Medicine, Amsterdam Movement Sciences, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - S A J Zaat
- Department of Medical Microbiology and Infection Prevention, Amsterdam Institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
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van Charante F, Martínez-Pérez D, Guarch-Pérez C, Courtens C, Sass A, Choińska E, Idaszek J, Van Calenbergh S, Riool M, Zaat SA, Święszkowski W, Coenye T. 3D-printed wound dressings containing a fosmidomycin-derivative prevent Acinetobacter baumannii biofilm formation. iScience 2023; 26:107557. [PMID: 37680458 PMCID: PMC10480667 DOI: 10.1016/j.isci.2023.107557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 05/24/2023] [Accepted: 08/02/2023] [Indexed: 09/09/2023] Open
Abstract
Acinetobacter baumannii causes a wide range of infections, including wound infections. Multidrug-resistant A. baumannii is a major healthcare concern and the development of novel treatments against these infections is needed. Fosmidomycin is a repurposed antimalarial drug targeting the non-mevalonate pathway, and several derivatives show activity toward A. baumannii. We evaluated the antimicrobial activity of CC366, a fosmidomycin prodrug, against a collection of A. baumannii strains, using various in vitro and in vivo models; emphasis was placed on the evaluation of its anti-biofilm activity. We also developed a 3D-printed wound dressing containing CC366, using melt electrowriting technology. Minimal inhibitory concentrations of CC366 ranged from 1 to 64 μg/mL, and CC366 showed good biofilm inhibitory and moderate biofilm eradicating activity in vitro. CC366 successfully eluted from a 3D-printed dressing, the dressings prevented the formation of A. baumannnii wound biofilms in vitro and reduced A. baumannii infection in an in vivo mouse model.
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Affiliation(s)
- Frits van Charante
- Laboratory of Pharmaceutical Microbiology, Ghent University, 9000 Ghent, Belgium
| | - David Martínez-Pérez
- Biomaterials, Faculty of Materials Science and Engineering, Warsaw University of Technology, 02-507 Warsaw, Poland
| | - Clara Guarch-Pérez
- Department of Medical Microbiology and Infection Prevention, Amsterdam institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, the Netherlands
| | - Charlotte Courtens
- Laboratory of Medicinal Chemistry, Ghent University, 9000 Ghent, Belgium
| | - Andrea Sass
- Laboratory of Pharmaceutical Microbiology, Ghent University, 9000 Ghent, Belgium
| | - Emilia Choińska
- Biomaterials, Faculty of Materials Science and Engineering, Warsaw University of Technology, 02-507 Warsaw, Poland
| | - Joanna Idaszek
- Biomaterials, Faculty of Materials Science and Engineering, Warsaw University of Technology, 02-507 Warsaw, Poland
| | | | - Martijn Riool
- Department of Medical Microbiology and Infection Prevention, Amsterdam institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, the Netherlands
| | - Sebastian A.J. Zaat
- Department of Medical Microbiology and Infection Prevention, Amsterdam institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, the Netherlands
| | - Wojciech Święszkowski
- Biomaterials, Faculty of Materials Science and Engineering, Warsaw University of Technology, 02-507 Warsaw, Poland
| | - Tom Coenye
- Laboratory of Pharmaceutical Microbiology, Ghent University, 9000 Ghent, Belgium
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Bournez C, Riool M, de Boer L, Cordfunke RA, de Best L, van Leeuwen R, Drijfhout JW, Zaat SAJ, van Westen GJP. CalcAMP: A New Machine Learning Model for the Accurate Prediction of Antimicrobial Activity of Peptides. Antibiotics (Basel) 2023; 12:antibiotics12040725. [PMID: 37107088 PMCID: PMC10135148 DOI: 10.3390/antibiotics12040725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 03/24/2023] [Accepted: 03/31/2023] [Indexed: 04/29/2023] Open
Abstract
To combat infection by microorganisms host organisms possess a primary arsenal via the innate immune system. Among them are defense peptides with the ability to target a wide range of pathogenic organisms, including bacteria, viruses, parasites, and fungi. Here, we present the development of a novel machine learning model capable of predicting the activity of antimicrobial peptides (AMPs), CalcAMP. AMPs, in particular short ones (<35 amino acids), can become an effective solution to face the multi-drug resistance issue arising worldwide. Whereas finding potent AMPs through classical wet-lab techniques is still a long and expensive process, a machine learning model can be useful to help researchers to rapidly identify whether peptides present potential or not. Our prediction model is based on a new data set constructed from the available public data on AMPs and experimental antimicrobial activities. CalcAMP can predict activity against both Gram-positive and Gram-negative bacteria. Different features either concerning general physicochemical properties or sequence composition have been assessed to retrieve higher prediction accuracy. CalcAMP can be used as an promising prediction asset to identify short AMPs among given peptide sequences.
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Affiliation(s)
- Colin Bournez
- Computational Drug Discovery, Drug Discovery and Safety, Leiden Academic Centre for Drug Research, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Martijn Riool
- Department of Medical Microbiology and Infection Prevention, Amsterdam Institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Leonie de Boer
- Department of Medical Microbiology and Infection Prevention, Amsterdam Institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Robert A Cordfunke
- Department Immunology, Leiden University Medical Center, 2300 RC Leiden, The Netherlands
| | - Leonie de Best
- Madam Therapeutics B.V., Pivot Park Life Sciences Community, Kloosterstraat 9, 5349 AB Oss, The Netherlands
| | - Remko van Leeuwen
- Madam Therapeutics B.V., Pivot Park Life Sciences Community, Kloosterstraat 9, 5349 AB Oss, The Netherlands
| | - Jan Wouter Drijfhout
- Department Immunology, Leiden University Medical Center, 2300 RC Leiden, The Netherlands
| | - Sebastian A J Zaat
- Department of Medical Microbiology and Infection Prevention, Amsterdam Institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Gerard J P van Westen
- Computational Drug Discovery, Drug Discovery and Safety, Leiden Academic Centre for Drug Research, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
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Diedrich CM, Verhorstert KWJ, Riool M, Schuster H, de Boer L, Kikhney J, Moter A, Zaat SAJ, Roovers JPWR. Transvaginal Mesh-related Complications and the Potential Role of Bacterial Colonization: An Exploratory Observational Study. J Minim Invasive Gynecol 2023; 30:205-215. [PMID: 36442754 DOI: 10.1016/j.jmig.2022.11.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 10/12/2022] [Accepted: 11/19/2022] [Indexed: 11/27/2022]
Abstract
STUDY OBJECTIVE This study aimed to investigate the potential role of transvaginal mesh bacterial colonization in the development of mesh-related complications (MRCs). DESIGN An observational and exploratory study. SETTING Tertiary referral center (Amsterdam UMC, location AMC, Amsterdam, The Netherlands). PATIëNTS: 49 patients indicated for mesh removal and 20 women of whom vaginal tissue was retrieved during prolapse surgery as a reference cohort. INTERVENTIONS collection of mesh-tissue complex (patient cohort) or vaginal tissue (reference cohort) MEASUREMENTS AND MAIN RESULTS: Homogenized samples were used for quantitative microbiological culture. Inflammation and fibrosis were semiquantitatively histologically scored; Gram staining and fluorescence in situ hybridization were used to detect bacteria and bacterial biofilms. Of the 49 patients, 44 samples (90%) were culture positive, with a higher diversity of species and more Gram-negative bacteria and polymicrobial cultures in the MRC cohort than the reference cohort, with mostly staphylococci, streptococci, Actinomyces spp., Cutibacterium acnes, and Escherichia coli. Patients with clinical signs of infection or exposure had the highest bacterial counts. Histology demonstrated moderate to severe inflammation in most samples. Gram staining showed bacteria in 57% of culture-positive samples, and in selected samples, fluorescence in situ hybridization illustrated a polymicrobial biofilm. CONCLUSION In this study, we observed distinct differences in bacterial numbers and species between patients with MRCs and a reference cohort. Bacteria were observed at the mesh-tissue interface in a biofilm. These results strongly support the potential role of bacterial mesh colonization in the development of MRCs.
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Affiliation(s)
- Chantal M Diedrich
- Department of Obstetrics and Gynecology, Amsterdam Reproduction and Development, Amsterdam UMC, University of Amsterdam, Meibergdreef 9 (Drs. Diedrich, Verhorstert, Schuster, and Roovers), Amsterdam, The Netherlands; Department of Medical Microbiology and Infection Prevention, Amsterdam institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Meibergdreef 9 (Drs. Diedrich, Verhorstert, Riool, Zaa, and Schuster, Ms. de Boer), Amsterdam, The Netherlands.
| | - Kim W J Verhorstert
- Department of Obstetrics and Gynecology, Amsterdam Reproduction and Development, Amsterdam UMC, University of Amsterdam, Meibergdreef 9 (Drs. Diedrich, Verhorstert, Schuster, and Roovers), Amsterdam, The Netherlands; Department of Medical Microbiology and Infection Prevention, Amsterdam institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Meibergdreef 9 (Drs. Diedrich, Verhorstert, Riool, Zaa, and Schuster, Ms. de Boer), Amsterdam, The Netherlands
| | - Martijn Riool
- Department of Medical Microbiology and Infection Prevention, Amsterdam institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Meibergdreef 9 (Drs. Diedrich, Verhorstert, Riool, Zaa, and Schuster, Ms. de Boer), Amsterdam, The Netherlands
| | - Heleen Schuster
- Department of Obstetrics and Gynecology, Amsterdam Reproduction and Development, Amsterdam UMC, University of Amsterdam, Meibergdreef 9 (Drs. Diedrich, Verhorstert, Schuster, and Roovers), Amsterdam, The Netherlands; Department of Medical Microbiology and Infection Prevention, Amsterdam institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Meibergdreef 9 (Drs. Diedrich, Verhorstert, Riool, Zaa, and Schuster, Ms. de Boer), Amsterdam, The Netherlands
| | - Leonie de Boer
- Department of Medical Microbiology and Infection Prevention, Amsterdam institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Meibergdreef 9 (Drs. Diedrich, Verhorstert, Riool, Zaa, and Schuster, Ms. de Boer), Amsterdam, The Netherlands
| | - Judith Kikhney
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institute for Microbiology, Infectious Diseases, and Immunology, Biofilmcenter, Hindenburgdamm 30 (Drs. Kikhney and Moter), 12203 Berlin, Germany; MoKi Analytics GmbH, Hindenburgdamm 30 (Drs. Kikhney and Moter) 12203 Berlin, Germany
| | - Annette Moter
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institute for Microbiology, Infectious Diseases, and Immunology, Biofilmcenter, Hindenburgdamm 30 (Drs. Kikhney and Moter), 12203 Berlin, Germany; MoKi Analytics GmbH, Hindenburgdamm 30 (Drs. Kikhney and Moter) 12203 Berlin, Germany; Practice Moter Diagnostics (practice), Marienplatz 9 (Dr. Moter), 12207 Berlin, Germany
| | - Sebastian A J Zaat
- Department of Medical Microbiology and Infection Prevention, Amsterdam institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Meibergdreef 9 (Drs. Diedrich, Verhorstert, Riool, Zaa, and Schuster, Ms. de Boer), Amsterdam, The Netherlands
| | - Jan-Paul W R Roovers
- Department of Obstetrics and Gynecology, Amsterdam Reproduction and Development, Amsterdam UMC, University of Amsterdam, Meibergdreef 9 (Drs. Diedrich, Verhorstert, Schuster, and Roovers), Amsterdam, The Netherlands
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Martínez-Pérez D, Guarch-Pérez C, Kenichi Purbayanto MA, Choińska E, Riool M, A. J. Zaat S, Święszkowski W. 3D-printed dual drug delivery nanoparticleloaded hydrogels to combat antibiotic-resistant bacteria. Int J Bioprint 2023. [DOI: 10.18063/ijb.683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
Implant-associated infections are not easy to diagnose and very difficult to treat, due to the ability of major pathogens, such as Staphylococcus aureus, to develop biofilms and escape the immune response and antibiotic treatment. We, therefore, aimed to develop a 3D-printed dual rifampicin (Rif )- and vancomycin (Van)-loaded polylactic-co-glycolic acid (PLGA) nanoparticles (NPs) delivery system based on hydrogels made of gelatin methacrylate (GelMA). The release of Rif and Van from NPs manufactured from different PLGA molecular weights was studied in phosphate-buffered saline for 21 days. Low molecular weight PLGA NPs exhibited the fastest release of Rif and Van within the first 7 days and were selected for antimicrobial evaluation. Four different GelMA-based 3D-printed samples were successfully produced, carrying non-loaded NPs, Rif-NPs, Van-NPs, or alternating layers of Rif-NPs and Van-NP. The exposition of S. aureus against increased concentrations of Rif or Van produced new resistant strains to Rif (RifR) or Van (VanR). The GelMA hydrogel co-delivering Rif and Van eradicated S. aureus RN4220 RifR and RN4220 VanR strains. S. aureus RN4220 and S. aureus AMC 201 colonies developed resistance to Rif after contact with the GelMA hydrogel containing only Rif-NPs which appeared to be due to known mutations in the rpoB gene. In conclusion, 3D-printed GelMA hydrogel loaded with PLGA Rif-Van-NPs drug delivery system show promising in vitro results to prevent implant-associated infections caused by antimicrobial-resistant bacteria.
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Riool M, Patrulea V, Monteiro C. Antimicrobial Peptide–Polymer Conjugates. Pharmaceutics 2022; 14:pharmaceutics14102171. [PMID: 36297606 PMCID: PMC9607516 DOI: 10.3390/pharmaceutics14102171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Accepted: 10/10/2022] [Indexed: 11/28/2022] Open
Affiliation(s)
- Martijn Riool
- Department of Medical Microbiology and Infection Prevention, Amsterdam Institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
- Correspondence: (M.R.); (V.P.); (C.M.)
| | - Viorica Patrulea
- Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford OX3 7DQ, UK
- Correspondence: (M.R.); (V.P.); (C.M.)
| | - Cláudia Monteiro
- I3S—Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, 4200-135 Porto, Portugal
- INEB—Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen, 208, 4200-135 Porto, Portugal
- Correspondence: (M.R.); (V.P.); (C.M.)
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10
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Vazquez-Rodriguez JA, Shaqour B, Guarch-Pérez C, Choińska E, Riool M, Verleije B, Beyers K, Costantini VJA, Święszkowski W, Zaat SAJ, Cos P, Felici A, Ferrari L. A Niclosamide-releasing hot-melt extruded catheter prevents Staphylococcus aureus experimental biomaterial-associated infection. Sci Rep 2022; 12:12329. [PMID: 35854044 PMCID: PMC9296466 DOI: 10.1038/s41598-022-16107-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 07/05/2022] [Indexed: 11/18/2022] Open
Abstract
Biomaterial-associated infections are a major healthcare challenge as they are responsible for high disease burden in critically ill patients. In this study, we have developed drug-eluting antibacterial catheters to prevent catheter-related infections. Niclosamide (NIC), originally an antiparasitic drug, was incorporated into the polymeric matrix of thermoplastic polyurethane (TPU) via solvent casting, and catheters were fabricated using hot-melt extrusion technology. The mechanical and physicochemical properties of TPU polymers loaded with NIC were studied. NIC was released in a sustained manner from the catheters and exhibited in vitro antibacterial activity against Staphylococcus aureus and Staphylococcus epidermidis. Moreover, the antibacterial efficacy of NIC-loaded catheters was validated in an in vivo biomaterial-associated infection model using a methicillin-susceptible and methicillin-resistant strain of S. aureus. The released NIC from the produced catheters reduced bacterial colonization of the catheter as well as of the surrounding tissue. In summary, the NIC-releasing hot-melt extruded catheters prevented implant colonization and reduced the bacterial colonization of peri-catheter tissue by methicillin sensitive as well as resistant S. aureus in a biomaterial-associated infection mouse model and has good prospects for preclinical development.
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Affiliation(s)
- Jesus Augusto Vazquez-Rodriguez
- Discovery Microbiology, Aptuit S.R.L., an Evotec Company, via A. Fleming 4, 37135, Verona, Italy. .,Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy.
| | - Bahaa Shaqour
- Laboratory for Microbiology, Parasitology and Hygiene (LMPH), Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Universiteitsplein 1 S.7, 2610, Antwerp, Belgium.,Mechanical and Mechatronics Engineering Department, Faculty of Engineering & Information Technology, An-Najah National University, P.O. Box 7, Nablus, Palestine
| | - Clara Guarch-Pérez
- Department of Medical Microbiology and Infection Prevention, Amsterdam Institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, 1105 AZ, Amsterdam, The Netherlands
| | - Emilia Choińska
- Faculty of Materials Sciences and Engineering, Warsaw University of Technology, Wołoska 141, 02-507, Warsaw, Poland
| | - Martijn Riool
- Department of Medical Microbiology and Infection Prevention, Amsterdam Institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, 1105 AZ, Amsterdam, The Netherlands
| | - Bart Verleije
- Voxdale BV, Bijkhoevelaan 32C, 2110, Wijnegem, Belgium
| | - Koen Beyers
- Voxdale BV, Bijkhoevelaan 32C, 2110, Wijnegem, Belgium
| | - Vivian J A Costantini
- Discovery Microbiology, Aptuit S.R.L., an Evotec Company, via A. Fleming 4, 37135, Verona, Italy
| | - Wojciech Święszkowski
- Faculty of Materials Sciences and Engineering, Warsaw University of Technology, Wołoska 141, 02-507, Warsaw, Poland
| | - Sebastian A J Zaat
- Department of Medical Microbiology and Infection Prevention, Amsterdam Institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, 1105 AZ, Amsterdam, The Netherlands
| | - Paul Cos
- Laboratory for Microbiology, Parasitology and Hygiene (LMPH), Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Universiteitsplein 1 S.7, 2610, Antwerp, Belgium
| | - Antonio Felici
- Discovery Microbiology, Aptuit S.R.L., an Evotec Company, via A. Fleming 4, 37135, Verona, Italy
| | - Livia Ferrari
- Discovery Microbiology, Aptuit S.R.L., an Evotec Company, via A. Fleming 4, 37135, Verona, Italy
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11
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Verhorstert KW, Riool M, Bulten T, Guler Z, de Boer L, Roovers JPW, Zaat SA. The impact of bacterial contamination on the host response towards fully absorbable poly-4-hydroxybutyrate and nonabsorbable polypropylene pelvic floor implants. Mater Today Bio 2022; 15:100268. [PMID: 35517580 PMCID: PMC9062440 DOI: 10.1016/j.mtbio.2022.100268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 04/11/2022] [Accepted: 04/17/2022] [Indexed: 11/03/2022] Open
Abstract
Polypropylene (PP) implants for the vaginal surgical correction of pelvic organ prolapse (POP) are known for adverse events, like vaginal or visceral exposures. It is hypothesized that this is a result of a prolonged inflammatory response. One of the triggering factors of prolonged inflammation might be bacterial contamination. A possible solution might lie in an absorbable biomaterial, which provides initial mechanical support while being gradually replaced by the host tissue. With this study we aimed to compare the host response, in a subcutaneous mouse implant infection model, to delayed absorbable poly-4-hydroxybutyrate (P4HB) and a latest generation PP implant. By comparing non-infected to Staphylococcus aureus infected mice, we assessed how bacterial contamination affects the host response and its role in the development of complications. Further, we included sham surgery as a control, mimicking the wound response in native tissue repair. Despite the higher surface area of the P4HB implants, the clearance of infection was similarly delayed in the presence of a P4HB or PP implant, as compared to sham. Further, the host response towards P4HB and PP was quite comparable, yet collagen deposition was significantly increased around infected P4HB implants at early time points. Adverse event rates were similar, though implant exposures were only seen in infected mice and more often with PP (11.1%) than P4HB implants (5.6%). Infected mice overall had significantly higher levels of infiltration of inflammatory cells and lower levels of vascularization and collagen deposition compared to non-infected mice. Thus, for both P4HB and PP, bacterial contamination negatively affected mesh integration by increased inflammation and an increased adverse event rate. Altogether, our results from this subcutaneous mouse implant infection study suggest that P4HB could be a promising degradable alternative to PP, warranting further research to study its potential as a new surgical solution for women with POP. Absorbable poly-4-hydroxybutyrate (P4HB) is studied as a novel pelvic floor implant. Comparable host response to P4HB and polypropylene in a subcutaneous mouse implant infection model. Implant exposures exclusively occurred upon Staphylococcus aureus infection. Exposures occurred less with P4HB (5.6%) compared to polypropylene (11.1%). S. aureus infection increased inflammation and deranged the host response.
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12
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Amorim LFA, Mouro C, Riool M, Gouveia IC. Antimicrobial Food Packaging Based on Prodigiosin-Incorporated Double-Layered Bacterial Cellulose and Chitosan Composites. Polymers (Basel) 2022; 14:polym14020315. [PMID: 35054720 PMCID: PMC8781631 DOI: 10.3390/polym14020315] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 01/06/2022] [Accepted: 01/10/2022] [Indexed: 02/01/2023] Open
Abstract
Nowadays, food packaging systems have shifted from a passive to an active role in which the incorporation of antimicrobial compounds into biopolymers can promote a sustainable way to reduce food spoilage and its environmental impact. Accordingly, composite materials based on oxidized-bacterial cellulose (BC) and poly(vinyl alcohol)-chitosan (PVA-CH) nanofibers were produced by needleless electrospinning and functionalized with the bacterial pigment prodigiosin (PG). Two strategies were explored, in the first approach PG was incorporated in the electrospun PVA-CH layer, and TEMPO-oxidized BC was the substrate for nanofibers deposition (BC/PVA-CH_PG composite). In the second approach, TEMPO-oxidized BC was functionalized with PG, and afterward, the PVA-CH layer was electrospun (BC_PG/PVA-CH composite). The double-layer composites obtained were characterized and the nanofibrous layers displayed smooth fibers with average diameters of 139.63 ± 65.52 nm and 140.17 ± 57.04 nm, with and without pigment incorporation, respectively. FTIR-ATR analysis confirmed BC oxidation and revealed increased intensity at specific wavelengths, after pigment incorporation. Moreover, the moderate hydrophilic behavior, as well as the high porosity exhibited by each layer, remained mostly unaffected after PG incorporation. The composites’ mechanical performance and the water vapor transmission rate (WVTR) evaluation indicated the suitability of the materials for certain food packaging solutions, especially for fresh products. Additionally, the red color provided by the bacterial pigment PG on the external surface of a food packaging material is also a desirable effect, to attract the consumers’ attention, creating a multifunctional material. Furthermore, the antimicrobial activity was evaluated and, PVA-CH_PG, and BC_PG layers exhibited the highest antimicrobial activity against Staphylococcus aureus and Pseudomonas aeruginosa. Thus, the fabricated composites can be considered for application in active food packaging, owing to PG antimicrobial potential, to prevent foodborne pathogens (with PG incorporated into the inner layer of the food packaging material, BC/PVA-CH_PG composite), but also to prevent external contamination, by tackling the exterior of food packaging materials (with PG added to the outer layer, BC_PG/PVA-CH composite).
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Affiliation(s)
- Lúcia F. A. Amorim
- FibEnTech Research Unit, Faculty of Engineering, University of Beira Interior, 6200-001 Covilhã, Portugal; (L.F.A.A.); (C.M.)
| | - Cláudia Mouro
- FibEnTech Research Unit, Faculty of Engineering, University of Beira Interior, 6200-001 Covilhã, Portugal; (L.F.A.A.); (C.M.)
| | - Martijn Riool
- Department of Medical Microbiology and Infection Prevention, Amsterdam UMC, Amsterdam Institute for Infection and Immunity, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands;
| | - Isabel C. Gouveia
- FibEnTech Research Unit, Faculty of Engineering, University of Beira Interior, 6200-001 Covilhã, Portugal; (L.F.A.A.); (C.M.)
- Correspondence: ; Tel.: +351-27-531-9825
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13
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Jia Z, Müller M, Le Gall T, Riool M, Müller M, Zaat SA, Montier T, Schönherr H. Multiplexed detection and differentiation of bacterial enzymes and bacteria by color-encoded sensor hydrogels. Bioact Mater 2021; 6:4286-4300. [PMID: 33997506 PMCID: PMC8105640 DOI: 10.1016/j.bioactmat.2021.04.022] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 03/12/2021] [Accepted: 04/09/2021] [Indexed: 12/19/2022] Open
Abstract
We report on the fabrication and characterization of color-encoded chitosan hydrogels for the rapid, sensitive and specific detection of bacterial enzymes as well as the selective detection of a set of tested bacteria through characteristic enzyme reactions. These patterned sensor hydrogels are functionalized with three different colorimetric enzyme substrates affording the multiplexed detection and differentiation of α-glucosidase, β-galactosidase and β-glucuronidase. The limits of detection of the hydrogels for an observation time of 60 min using a conventional microplate reader correspond to concentrations of 0.2, 3.4 and 4.5 nM of these enzymes, respectively. Based on their different enzyme expression patterns, Staphylococcus aureus strain RN4220, methicillin-resistant S. aureus (MRSA) strain N315, both producing α-glucosidase, but not β-glucuronidase and β-galactosidase, Escherichia coli strain DH5α, producing β-glucuronidase and α-glucosidase, but not β-galactosidase, and the enterohemorrhagic E. coli (EHEC) strain E32511, producing β-galactosidase, but none of the other two enzymes, can be reliably and rapidly distinguished from each other. These results confirm the applicability of enzyme sensing hydrogels for the detection and discrimination of specific enzymes to facilitate differentiation of bacterial strains. Patterned hydrogels thus possess the potential to be further refined as detection units of a multiplexed format to identify certain bacteria for future application in point-of-care microbiological diagnostics in food safety and medical settings.
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Affiliation(s)
- Zhiyuan Jia
- Physical Chemistry I & Research Center of Micro and Nanochemistry and Engineering (Cμ), Department of Chemistry and Biology, University of Siegen, Adolf-Reichwein-Straße 2, 57076, Siegen, Germany
| | - Mareike Müller
- Physical Chemistry I & Research Center of Micro and Nanochemistry and Engineering (Cμ), Department of Chemistry and Biology, University of Siegen, Adolf-Reichwein-Straße 2, 57076, Siegen, Germany
| | - Tony Le Gall
- Univ Brest, INSERM, EFS, UMR 1078 GGFB, F-29200, Brest, France
| | - Martijn Riool
- Department of Medical Microbiology and Infection Prevention, Amsterdam institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1105, AZ, Amsterdam, the Netherlands
| | - Max Müller
- Physical Chemistry I & Research Center of Micro and Nanochemistry and Engineering (Cμ), Department of Chemistry and Biology, University of Siegen, Adolf-Reichwein-Straße 2, 57076, Siegen, Germany
| | - Sebastian A.J. Zaat
- Department of Medical Microbiology and Infection Prevention, Amsterdam institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1105, AZ, Amsterdam, the Netherlands
| | - Tristan Montier
- Univ Brest, INSERM, EFS, UMR 1078 GGFB, F-29200, Brest, France
- CHRU de Brest, Service de génétique médicale et de biologie de la reproduction, Centre de Référence des Maladies Rares « Maladies neuromusculaires », F-29200, Brest, France
| | - Holger Schönherr
- Physical Chemistry I & Research Center of Micro and Nanochemistry and Engineering (Cμ), Department of Chemistry and Biology, University of Siegen, Adolf-Reichwein-Straße 2, 57076, Siegen, Germany
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14
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Abstract
Osteomyelitis is an inflammatory bone disease caused by an infecting microorganism leading to a gradual bone loss. Due to the difficulty in studying osteomyelitis directly in patients, animal models allow researchers to investigate the pathogenesis of the infection and the development of novel prophylactic, anti-inflammatory and antimicrobial treatment strategies. This review is specifically focused on the in vivo mouse osteomyelitis studies available in literature. Thus, a systematic search on Web of Science and PubMed was conducted using the query "(infection) AND (mice OR mouse OR murine) AND (model OR models) AND (arthroplasty OR fracture OR (internal fixator) OR (internal fixation OR prosthesis OR implant OR osteomyelitis)". After critical assessment of the studies according to the inclusion and exclusion criteria, 135 studies were included in the detailed analysis. Based on the model characteristics, the studies were classified into five subject groups: haematogenous osteomyelitis, post-traumatic osteomyelitis, bone-implant-related infection, peri-prosthetic joint infection, fracture-related infection. In addition, the characteristics of the mice used, such as inbred strain, age or gender, the characteristics of the pathogens used, the inoculation methods, the type of anaesthesia and analgesia used during surgery and the procedures for evaluating the pathogenicity of the infecting micro-organism were described. Overall, the mouse is an excellent first step in vivo model to study the pathogenesis, inflammation and healing process of osteomyelitis and to evaluate novel prophylaxis and treatment strategies.
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Affiliation(s)
| | | | - S Aj Zaat
- Department of Medical Microbiology and Infection Prevention, Amsterdam UMC, Meibergdreef 9, 1105 AZ, Amsterdam, the Netherlands.
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15
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Hofstee MI, Riool M, Gieling F, Stenger V, Constant C, Nehrbass D, Zeiter S, Richards RG, Zaat SA, Moriarty TF. A murine Staphylococcus aureus fracture-related infection model characterised by fracture non-union, staphylococcal abscess communities and myeloid-derived suppressor cells. Eur Cell Mater 2021; 41:774-792. [PMID: 34151416 DOI: 10.22203/ecm.v041a49] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
A fracture-related infection (FRI) is a serious complication that can occur after surgical fixation of bone fractures. Affected patients may encounter delayed healing and functional limitations. Although it is well established that Staphylococcus aureus (S. aureus) is the main causative pathogen of an FRI, the pathophysiology of an S. aureus-induced FRI is not well characterised over time. Therefore, an experimental study in mice comparing S. aureus-inoculated and non-inoculated groups was performed that particularly focused on staphylococcal abscess communities (SACs) and host cellular response. C57Bl/6N female mice received a double osteotomy of the femur, which was stabilised using a titanium 6-hole MouseFix locking plate and four screws. Animals were either S. aureus-inoculated or non-inoculated and euthanised between 1 and 28 d post-surgery. Histopathological evaluation showed normal bone healing for non-inoculated mice, whereas inoculated mice had no fracture consolidation and severe osteolysis. Within the bone marrow of inoculated mice, SACs were observed from 7 d, which increased in size and number over time. A fibrin pseudocapsule enclosed the SACs, which were surrounded by many Ly6G+ neutrophils with some Ly6C+ monocytes and F4/80+ macrophages, the majority of which were viable. The abscesses were encapsulated by fibrin(ogen), collagen and myofibroblasts, with regulatory T cells and M2 macrophages at the periphery. Only bone marrow monocytes and neutrophils of inoculated mice displayed functional suppression of T cells, indicative of myeloid-derived suppressor cells. The present study revealed that an FRI in mice is persistent over time and associated with osteolysis, SAC formation and an immunosuppressive environment.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - T F Moriarty
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos,
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16
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Shaqour B, Aizawa J, Guarch-Pérez C, Górecka Ż, Christophersen L, Martinet W, Choińska E, Riool M, Verleije B, Beyers K, Moser C, Święszkowski W, Zaat SAJ, Cos P. Coupling Additive Manufacturing with Hot Melt Extrusion Technologies to Validate a Ventilator-Associated Pneumonia Mouse Model. Pharmaceutics 2021; 13:pharmaceutics13060772. [PMID: 34064276 PMCID: PMC8224298 DOI: 10.3390/pharmaceutics13060772] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/08/2021] [Accepted: 05/18/2021] [Indexed: 12/02/2022] Open
Abstract
Additive manufacturing is widely used to produce highly complex structures. Moreover, this technology has proven its superiority in producing tools which can be used in different applications. We designed and produced an extrusion nozzle that allowed us to hot melt extrude drug-loaded tubes. The tubes were an essential part of a new mouse ventilator-associated pneumonia (VAP) model. Ciprofloxacin (CPX) was selected for its expected activity against the pathogen Staphylococcus aureus and ease of incorporation into thermoplastic polyurethane (TPU). TPU was selected as the carrier polymer for its biocompatibility and use in a variety of medical devices such as tubing and catheters. The effect of loading CPX within the TPU polymeric matrix and the physicochemical properties of the produced tubes were investigated. CPX showed good thermal stability and in vitro activity in preventing S. aureus biofilm formation after loading within the tube’s polymeric matrix. Moreover, the produced tubes showed anti-infective efficacy in vivo. The produced tubes, which were extruded via our novel nozzle, were vital for the validation of our mouse VAP model. This model can be adopted to investigate other antibacterial and antibiofilm compounds incorporated in polymeric tubes using hot melt extrusion.
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Affiliation(s)
- Bahaa Shaqour
- Laboratory for Microbiology, Parasitology and Hygiene (LMPH), Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Universiteitsplein 1 S.7, 2610 Wilrijk, Belgium; (J.A.); (P.C.)
- Mechanical and Mechatronics Engineering Department, Faculty of Engineering & Information Technology, An-Najah National University, Nablus P.O. Box 7, Palestine
- Correspondence:
| | - Juliana Aizawa
- Laboratory for Microbiology, Parasitology and Hygiene (LMPH), Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Universiteitsplein 1 S.7, 2610 Wilrijk, Belgium; (J.A.); (P.C.)
| | - Clara Guarch-Pérez
- Department of Medical Microbiology and Infection Prevention, Amsterdam Institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; (C.G.-P.); (M.R.); (S.A.J.Z.)
| | - Żaneta Górecka
- Faculty of Materials Sciences and Engineering, Warsaw University of Technology, Woloska 141, 02-507 Warsaw, Poland; (Ż.G.); (E.C.); (W.Ś.)
- Centre for Advanced Materials and Technologies CEZAMAT, Warsaw University of Technology, Poleczki 19, 02-822 Warsaw, Poland
| | - Lars Christophersen
- Department for Clinical Microbiology, Rigshospitalet, Henrik Harpestrengsvej 4A, Afsnit 93.01, 2100 Copenhagen, Denmark; (L.C.); (C.M.)
| | - Wim Martinet
- Laboratory of Physiopharmacology, University of Antwerp, Universiteitsplein 1 T.2, 2610 Wilrijk, Belgium;
| | - Emilia Choińska
- Faculty of Materials Sciences and Engineering, Warsaw University of Technology, Woloska 141, 02-507 Warsaw, Poland; (Ż.G.); (E.C.); (W.Ś.)
| | - Martijn Riool
- Department of Medical Microbiology and Infection Prevention, Amsterdam Institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; (C.G.-P.); (M.R.); (S.A.J.Z.)
| | - Bart Verleije
- Voxdale bv, Bijkhoevelaan 32, 2110 Wijnegem, Belgium; (B.V.); (K.B.)
| | - Koen Beyers
- Voxdale bv, Bijkhoevelaan 32, 2110 Wijnegem, Belgium; (B.V.); (K.B.)
| | - Claus Moser
- Department for Clinical Microbiology, Rigshospitalet, Henrik Harpestrengsvej 4A, Afsnit 93.01, 2100 Copenhagen, Denmark; (L.C.); (C.M.)
| | - Wojciech Święszkowski
- Faculty of Materials Sciences and Engineering, Warsaw University of Technology, Woloska 141, 02-507 Warsaw, Poland; (Ż.G.); (E.C.); (W.Ś.)
| | - Sebastian A. J. Zaat
- Department of Medical Microbiology and Infection Prevention, Amsterdam Institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; (C.G.-P.); (M.R.); (S.A.J.Z.)
| | - Paul Cos
- Laboratory for Microbiology, Parasitology and Hygiene (LMPH), Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Universiteitsplein 1 S.7, 2610 Wilrijk, Belgium; (J.A.); (P.C.)
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17
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Verhorstert KW, Guler Z, de Boer L, Riool M, Roovers JPWR, Zaat SAJ. In Vitro Bacterial Adhesion and Biofilm Formation on Fully Absorbable Poly-4-hydroxybutyrate and Nonabsorbable Polypropylene Pelvic Floor Implants. ACS Appl Mater Interfaces 2020; 12:53646-53653. [PMID: 33210919 PMCID: PMC7716345 DOI: 10.1021/acsami.0c14668] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 11/02/2020] [Indexed: 05/03/2023]
Abstract
Knitted polypropylene (PP) implants for the correction of pelvic organ prolapse have been associated with complications such as vaginal exposure, infection, and pain. Since certain complications may be linked to bacterial contamination and persistent inflammation, there is a rationale to develop a biocompatible implant that is less prone to bacterial adhesion and biofilm formation. Delayed absorbable materials could meet these requirements and poly-4-hydroxybutyrate (P4HB) might be such a new material for future pelvic floor implants. We studied in vitro bacterial adhesion and biofilm formation on P4HB in comparison to PP. We investigated the influence of both polymers using flat films and compared P4HB and PP implants with different knitting designs. P4HB flat films were demonstrated to be hydrophilic with significantly less Staphylococcus aureus and Escherichia coli cultured from P4HB films than from hydrophobic PP films after 24 h of incubation. On the implants, a higher number of E. coli were cultured after 1 h of incubation from the knitted P4HB implant with the highest density and smallest pore size, compared to other P4HB and PP implants. No differences were observed between the implants for E. coli at later time points or for S. aureus incubation. These results show that in flat films, the polymer influences biofilm formation, demonstrated by a reduced biofilm formation on P4HB compared with PP flat films. In addition, the knitting design may affect bacterial adhesion. Despite certain design and material characteristics that give the knitted P4HB implants a higher surface area, this did not result in more bacterial adhesion and biofilm formation overall. Collectively, these results warrant further (pre)clinical investigations of P4HB pelvic floor implants.
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Affiliation(s)
- Kim W.
J. Verhorstert
- Department
of Obstetrics and Gynecology, Amsterdam Reproduction and Development,
Amsterdam UMC, University of Amsterdam, Meibergdreef 9, Amsterdam 1105 AZ, The
Netherlands
| | - Zeliha Guler
- Department
of Obstetrics and Gynecology, Amsterdam Reproduction and Development,
Amsterdam UMC, University of Amsterdam, Meibergdreef 9, Amsterdam 1105 AZ, The
Netherlands
| | - Leonie de Boer
- Department
of Medical Microbiology and Infection Prevention, Amsterdam Institute
for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, Amsterdam 1105 AZ, The Netherlands
| | - Martijn Riool
- Department
of Medical Microbiology and Infection Prevention, Amsterdam Institute
for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, Amsterdam 1105 AZ, The Netherlands
| | - Jan-Paul W. R. Roovers
- Department
of Obstetrics and Gynecology, Amsterdam Reproduction and Development,
Amsterdam UMC, University of Amsterdam, Meibergdreef 9, Amsterdam 1105 AZ, The
Netherlands
| | - Sebastian A. J. Zaat
- Department
of Medical Microbiology and Infection Prevention, Amsterdam Institute
for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, Amsterdam 1105 AZ, The Netherlands
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18
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Reigada I, Guarch-Pérez C, Patel JZ, Riool M, Savijoki K, Yli-Kauhaluoma J, Zaat SAJ, Fallarero A. Combined Effect of Naturally-Derived Biofilm Inhibitors and Differentiated HL-60 Cells in the Prevention of Staphylococcus aureus Biofilm Formation. Microorganisms 2020; 8:E1757. [PMID: 33182261 PMCID: PMC7695255 DOI: 10.3390/microorganisms8111757] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 11/06/2020] [Accepted: 11/07/2020] [Indexed: 02/07/2023] Open
Abstract
Nosocomial diseases represent a huge health and economic burden. A significant portion is associated with the use of medical devices, with 80% of these infections being caused by a bacterial biofilm. The insertion of a foreign material usually elicits inflammation, which can result in hampered antimicrobial capacity of the host immunity due to the effort of immune cells being directed to degrade the material. The ineffective clearance by immune cells is a perfect opportunity for bacteria to attach and form a biofilm. In this study, we analyzed the antibiofilm capacity of three naturally derived biofilm inhibitors when combined with immune cells in order to assess their applicability in implantable titanium devices and low-density polyethylene (LDPE) endotracheal tubes. To this end, we used a system based on the coculture of HL-60 cells differentiated into polymorphonuclear leukocytes (PMNs) and Staphylococcus aureus (laboratory and clinical strains) on titanium, as well as LDPE surfaces. Out of the three inhibitors, the one coded DHA1 showed the highest potential to be incorporated into implantable devices, as it displayed a combined activity with the immune cells, preventing bacterial attachment on the titanium and LDPE. The other two inhibitors seemed to also be good candidates for incorporation into LDPE endotracheal tubes.
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Affiliation(s)
- Inés Reigada
- Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, FI-00014 Helsinki, Finland; (K.S.); (A.F.)
| | - Clara Guarch-Pérez
- Department of Medical Microbiology and Infection Prevention, Amsterdam institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; (C.G.-P.); (M.R.); (S.A.J.Z.)
| | - Jayendra Z. Patel
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, FI-00014 Helsinki, Finland; (J.Z.P.); (J.Y.-K.)
| | - Martijn Riool
- Department of Medical Microbiology and Infection Prevention, Amsterdam institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; (C.G.-P.); (M.R.); (S.A.J.Z.)
| | - Kirsi Savijoki
- Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, FI-00014 Helsinki, Finland; (K.S.); (A.F.)
| | - Jari Yli-Kauhaluoma
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, FI-00014 Helsinki, Finland; (J.Z.P.); (J.Y.-K.)
| | - Sebastian A. J. Zaat
- Department of Medical Microbiology and Infection Prevention, Amsterdam institute for Infection and Immunity, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; (C.G.-P.); (M.R.); (S.A.J.Z.)
| | - Adyary Fallarero
- Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, FI-00014 Helsinki, Finland; (K.S.); (A.F.)
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Riool M, de Breij A, Kwakman PHS, Schonkeren-Ravensbergen E, de Boer L, Cordfunke RA, Malanovic N, Drijfhout JW, Nibbering PH, Zaat SAJ. Thrombocidin-1-derived antimicrobial peptide TC19 combats superficial multi-drug resistant bacterial wound infections. Biochim Biophys Acta Biomembr 2020; 1862:183282. [PMID: 32376222 DOI: 10.1016/j.bbamem.2020.183282] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 03/18/2020] [Accepted: 03/19/2020] [Indexed: 10/24/2022]
Abstract
Antimicrobial peptides are considered promising candidates for the development of novel antimicrobial agents to combat infections by multi-drug-resistant (MDR) bacteria. Here, we describe the identification and characterization of the synthetic peptide TC19, derived from the human thrombocidin-1-derived peptide L3. Biophysical experiments into the interaction between TC19 and mimics of human and bacterial plasma membranes demonstrated that the peptide is highly selective for bacterial membranes. In agreement, TC19 combined low cytotoxicity towards human fibroblasts with efficient and rapid killing in human plasma of MDR strains of several bacterial species of the ESKAPE panel. In addition, TC19 induced minor resistance in vitro, neutralized pro-inflammatory activity of bacterial cell envelope components while displaying slight chemotactic activity for human neutrophils. Importantly, topical application of TC19-containing hypromellose gel significantly reduced numbers of viable methicillin-resistant Staphylococcus aureus (MRSA) and MDR Acinetobacter baumannii in a superficial wound infection in mice. Together, TC19 is an attractive candidate for further development as a novel agent against (MDR) bacterial skin wound infections.
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Affiliation(s)
- Martijn Riool
- Dept. of Medical Microbiology, Amsterdam Infection and Immunity Institute, Amsterdam UMC, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, the Netherlands
| | - Anna de Breij
- Dept. of Infectious Diseases, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, the Netherlands
| | - Paulus H S Kwakman
- Dept. of Medical Microbiology, Amsterdam Infection and Immunity Institute, Amsterdam UMC, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, the Netherlands
| | | | - Leonie de Boer
- Dept. of Medical Microbiology, Amsterdam Infection and Immunity Institute, Amsterdam UMC, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, the Netherlands
| | - Robert A Cordfunke
- Dept. of Immunohematology and Blood Transfusion, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, the Netherlands
| | - Nermina Malanovic
- Biophysics Division, Institute of Molecular Biosciences, University of Graz, NAWI Graz, Humboldtstrasse 50/III, 8010 Graz, Austria
| | - Jan W Drijfhout
- Dept. of Immunohematology and Blood Transfusion, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, the Netherlands
| | - Peter H Nibbering
- Dept. of Infectious Diseases, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, the Netherlands
| | - Sebastian A J Zaat
- Dept. of Medical Microbiology, Amsterdam Infection and Immunity Institute, Amsterdam UMC, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, the Netherlands.
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20
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Dunne CP, Askew PD, Papadopoulos T, Gouveia IC, Ahonen M, Modic M, Azevedo NF, Schulte S, Cosemans P, Kahru A, Murzyn K, Keevil CW, Riool M, Keinänen-Toivola MM. Antimicrobial coating innovations to prevent infectious disease: a consensus view from the AMiCl COST Action. J Hosp Infect 2020; 105:116-118. [PMID: 32278702 PMCID: PMC7194850 DOI: 10.1016/j.jhin.2020.04.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 04/06/2020] [Indexed: 01/02/2023]
Affiliation(s)
- C P Dunne
- School of Medicine and Centre for Interventions in Infection, Inflammation & Immunity (4i), University of Limerick, Limerick, Ireland.
| | - P D Askew
- Industrial Microbiological Services Ltd (IMSL), Hampshire, UK
| | - T Papadopoulos
- Department of Microbiology and Infectious Diseases, School of Veterinary Medicine, Aristotle University, Thessaloniki, Greece
| | - I C Gouveia
- FibEnTech Research Unit, Faculty of Engineering, University of Beira Interior, Covilhã, Portugal
| | - M Ahonen
- Faculty of Technology, Satakunta University of Applied Sciences, Rauma, Finland
| | - M Modic
- Laboratory for Gaseous Electronics, Institute 'Jožef Stefan', Ljubljana, Slovenia
| | - N F Azevedo
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - S Schulte
- Evonik Resource Efficiency GmbH, Goldschmidtstrasse 100, 45127 Essen, Germany
| | | | - A Kahru
- Laboratory of Environmental Toxicology, National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
| | - K Murzyn
- LifeScience Krakow Klaster, Ul, Bobrzynskiego, 14 30-348 Krakow, Poland
| | - C W Keevil
- Environmental Healthcare Unit, Biological Sciences, University of Southampton, Southampton, UK
| | - M Riool
- Department of Medical Microbiology, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands; Amsterdam Infection and Immunity Institute, Amsterdam, the Netherlands
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21
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Hofstee MI, Muthukrishnan G, Atkins GJ, Riool M, Thompson K, Morgenstern M, Stoddart MJ, Richards RG, Zaat SAJ, Moriarty TF. Current Concepts of Osteomyelitis: From Pathologic Mechanisms to Advanced Research Methods. Am J Pathol 2020; 190:1151-1163. [PMID: 32194053 DOI: 10.1016/j.ajpath.2020.02.007] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 02/18/2020] [Accepted: 02/27/2020] [Indexed: 01/18/2023]
Abstract
Osteomyelitis is an inflammation of the bone and bone marrow that is most commonly caused by a Staphylococcus aureus infection. Much of our understanding of the underlying pathophysiology of osteomyelitis, from the perspective of both host and pathogen, has been revised in recent years, with notable discoveries including the role played by osteocytes in the recruitment of immune cells, the invasion and persistence of S. aureus in submicron channels of cortical bone, and the diagnostic role of polymorphonuclear cells in implant-associated osteomyelitis. Advanced in vitro cell culture models, such as ex vivo culture models or organoids, have also been developed over the past decade, and have become widespread in many fields, including infectious diseases. These models better mimic the in vivo environment, allow the use of human cells, and can reduce our reliance on animals in osteomyelitis research. In this review, we provide an overview of the main pathologic concepts in osteomyelitis, with a focus on the new discoveries in recent years. Furthermore, we outline the value of modern in vitro cell culture techniques, with a focus on their current application to infectious diseases and osteomyelitis in particular.
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Affiliation(s)
- Marloes I Hofstee
- AO Research Institute Davos, Davos, Switzerland; Department of Medical Microbiology, Amsterdam UMC, University of Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam, the Netherlands
| | - Gowrishankar Muthukrishnan
- Center for Musculoskeletal Research and Department of Orthopaedics, University of Rochester Medical Center, Rochester, New York
| | - Gerald J Atkins
- Centre for Orthopaedic and Trauma Research, University of Adelaide, Adelaide, South Australia, Australia
| | - Martijn Riool
- Department of Medical Microbiology, Amsterdam UMC, University of Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam, the Netherlands
| | | | - Mario Morgenstern
- Department of Orthopedic Surgery and Traumatology, University Hospital Basel, Basel, Switzerland
| | | | | | - Sebastian A J Zaat
- Department of Medical Microbiology, Amsterdam UMC, University of Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam, the Netherlands
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22
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de Breij A, Riool M, Cordfunke RA, Malanovic N, de Boer L, Koning RI, Ravensbergen E, Franken M, van der Heijde T, Boekema BK, Kwakman PHS, Kamp N, El Ghalbzouri A, Lohner K, Zaat SAJ, Drijfhout JW, Nibbering PH. The antimicrobial peptide SAAP-148 combats drug-resistant bacteria and biofilms. Sci Transl Med 2019; 10:10/423/eaan4044. [PMID: 29321257 DOI: 10.1126/scitranslmed.aan4044] [Citation(s) in RCA: 300] [Impact Index Per Article: 60.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 08/18/2017] [Accepted: 11/13/2017] [Indexed: 01/07/2023]
Abstract
Development of novel antimicrobial agents is a top priority in the fight against multidrug-resistant (MDR) and persistent bacteria. We developed a panel of synthetic antimicrobial and antibiofilm peptides (SAAPs) with enhanced antimicrobial activities compared to the parent peptide, human antimicrobial peptide LL-37. Our lead peptide SAAP-148 was more efficient in killing bacteria under physiological conditions in vitro than many known preclinical- and clinical-phase antimicrobial peptides. SAAP-148 killed MDR pathogens without inducing resistance, prevented biofilm formation, and eliminated established biofilms and persister cells. A single 4-hour treatment with hypromellose ointment containing SAAP-148 completely eradicated acute and established, biofilm-associated infections with methicillin-resistant Staphylococcus aureus and MDR Acinetobacter baumannii from wounded ex vivo human skin and murine skin in vivo. Together, these data demonstrate that SAAP-148 is a promising drug candidate in the battle against antibiotic-resistant bacteria that pose a great threat to human health.
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Affiliation(s)
- Anna de Breij
- Department of Infectious Diseases, Leiden University Medical Center, 2300 RC Leiden, Netherlands
| | - Martijn Riool
- Department of Medical Microbiology, Amsterdam Infection and Immunity Institute, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, Netherlands
| | - Robert A Cordfunke
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, 2300 RC Leiden, Netherlands
| | - Nermina Malanovic
- Biophysics Division, Institute of Molecular Biosciences, University of Graz, Naturwissenschaftliche Fakultät (NAWI) Graz, BioTechMed, 8010 Graz, Austria
| | - Leonie de Boer
- Department of Medical Microbiology, Amsterdam Infection and Immunity Institute, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, Netherlands
| | - Roman I Koning
- Department of Molecular Cell Biology, Leiden University Medical Center, 2300 RC Leiden, Netherlands.,Netherlands Center for Electron Nanoscopy, Institute of Biology Leiden, Leiden University, 2300 RA Leiden, Netherlands
| | - Elisabeth Ravensbergen
- Department of Infectious Diseases, Leiden University Medical Center, 2300 RC Leiden, Netherlands
| | - Marnix Franken
- Department of Infectious Diseases, Leiden University Medical Center, 2300 RC Leiden, Netherlands
| | - Tobias van der Heijde
- Department of Infectious Diseases, Leiden University Medical Center, 2300 RC Leiden, Netherlands
| | - Bouke K Boekema
- Association of Dutch Burn Centres, 1942 LT Beverwijk, Netherlands
| | - Paulus H S Kwakman
- Department of Medical Microbiology, Amsterdam Infection and Immunity Institute, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, Netherlands
| | - Niels Kamp
- Animal Research Institute, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, Netherlands
| | | | - Karl Lohner
- Biophysics Division, Institute of Molecular Biosciences, University of Graz, Naturwissenschaftliche Fakultät (NAWI) Graz, BioTechMed, 8010 Graz, Austria
| | - Sebastian A J Zaat
- Department of Medical Microbiology, Amsterdam Infection and Immunity Institute, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, Netherlands
| | - Jan W Drijfhout
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, 2300 RC Leiden, Netherlands
| | - Peter H Nibbering
- Department of Infectious Diseases, Leiden University Medical Center, 2300 RC Leiden, Netherlands.
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23
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Ramstedt M, Ribeiro IAC, Bujdakova H, Mergulhão FJM, Jordao L, Thomsen P, Alm M, Burmølle M, Vladkova T, Can F, Reches M, Riool M, Barros A, Reis RL, Meaurio E, Kikhney J, Moter A, Zaat SAJ, Sjollema J. Evaluating Efficacy of Antimicrobial and Antifouling Materials for Urinary Tract Medical Devices: Challenges and Recommendations. Macromol Biosci 2019; 19:e1800384. [PMID: 30884146 DOI: 10.1002/mabi.201800384] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 01/18/2019] [Indexed: 01/05/2023]
Abstract
In Europe, the mean incidence of urinary tract infections in intensive care units is 1.1 per 1000 patient-days. Of these cases, catheter-associated urinary tract infections (CAUTI) account for 98%. In total, CAUTI in hospitals is estimated to give additional health-care costs of £1-2.5 billion in the United Kingdom alone. This is in sharp contrast to the low cost of urinary catheters and emphasizes the need for innovative products that reduce the incidence rate of CAUTI. Ureteral stents and other urinary-tract devices suffer similar problems. Antimicrobial strategies are being developed, however, the evaluation of their efficacy is very challenging. This review aims to provide considerations and recommendations covering all relevant aspects of antimicrobial material testing, including surface characterization, biocompatibility, cytotoxicity, in vitro and in vivo tests, microbial strain selection, and hydrodynamic conditions, all in the perspective of complying to the complex pathology of device-associated urinary tract infection. The recommendations should be on the basis of standard assays to be developed which would enable comparisons of results obtained in different research labs both in industry and in academia, as well as provide industry and academia with tools to assess the antimicrobial properties for urinary tract devices in a reliable way.
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Affiliation(s)
| | - Isabel A C Ribeiro
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-004, Lisbon, Portugal
| | - Helena Bujdakova
- Department of Microbiology and Virology, Faculty of Natural Sciences, Comenius University in Bratislava, 81499, Bratislava 1, Slovakia
| | - Filipe J M Mergulhão
- Laboratory for Process Engineering, Environment, Biotechnology and Energy (LEPABE), Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Luisa Jordao
- Department of Environmental Health, Research and Development Unit, National Institute of Health Dr. Ricardo Jorge (INSA), Avenida Padre Cruz, 1649-016, Lisbon, Portugal
| | - Peter Thomsen
- BioModics ApS, Stengårds Alle 31A, DK-2800, Lyngby, Denmark
| | - Martin Alm
- BioModics ApS, Stengårds Alle 31A, DK-2800, Lyngby, Denmark
| | - Mette Burmølle
- Department of Biology, University of Copenhagen, 2100, Copenhagen, Denmark
| | - Todorka Vladkova
- Department of Polymers, University of Chemical Technology and Metallurgy (UCTM), 8 Kliment Ohridski Blvd, 1756, Sofia, Bulgaria
| | - Fusun Can
- Department of Medical Microbiology, School of Medicine, Koc University, 34450, Sariyer, Istanbul, Turkey
| | - Meital Reches
- Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - Martijn Riool
- Department of Medical Microbiology, Amsterdam UMC, Amsterdam Infection and Immunity Institute, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Alexandre Barros
- 3B's Research Group, I3Bs Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Guimarães, 4710-057, Braga, Portugal
| | - Rui L Reis
- 3B's Research Group, I3Bs Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Guimarães, 4710-057, Braga, Portugal
| | - Emilio Meaurio
- Department of Mining-Metallurgy Engineering and Materials Science, POLYMAT, School of Engineering, University of the Basque Country, 48940 Leina, Bizkaia, Bilbao, Spain
| | - Judith Kikhney
- Biofilmcenter, Department of Microbiology, Infectious Diseases and Immunology, Charité University Medicine Berlin, Hindenburgdamm 30, 12203, Berlin, Germany
| | - Annette Moter
- Biofilmcenter, Department of Microbiology, Infectious Diseases and Immunology, Charité University Medicine Berlin, Hindenburgdamm 30, 12203, Berlin, Germany
| | - Sebastian A J Zaat
- Department of Medical Microbiology, Amsterdam UMC, Amsterdam Infection and Immunity Institute, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Jelmer Sjollema
- University of Groningen, University Medical Center Groningen, Department of Biomedical Engineering, Antonius Deusinglaan 1, 9713 AV, Groningen, The Netherlands
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24
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van de Vijfeijken SE, Münker TJ, de Jager N, Vandertop WP, Becking AG, Kleverlaan CJ, Becking A, Dubois L, Karssemakers L, Milstein D, van de Vijfeijken S, Depauw P, Hoefnagels F, Vandertop W, Kleverlaan C, Münker T, Maal T, Nout E, Riool M, Zaat S. Properties of an In Vivo Fractured Poly(Methyl Methacrylate) Cranioplasty After 15 Years. World Neurosurg 2019; 123:e60-e68. [DOI: 10.1016/j.wneu.2018.11.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 11/02/2018] [Accepted: 11/04/2018] [Indexed: 11/16/2022]
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25
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Moriarty TF, Harris LG, Mooney RA, Wenke JC, Riool M, Zaat SAJ, Moter A, Schaer TP, Khanna N, Kuehl R, Alt V, Montali A, Liu J, Zeiter S, Busscher HJ, Grainger DW, Richards RG. Recommendations for design and conduct of preclinical in vivo studies of orthopedic device-related infection. J Orthop Res 2019; 37:271-287. [PMID: 30667561 DOI: 10.1002/jor.24230] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 12/06/2018] [Indexed: 02/04/2023]
Abstract
Orthopedic device-related infection (ODRI), including both fracture-related infection (FRI) and periprosthetic joint infection (PJI), remain among the most challenging complications in orthopedic and musculoskeletal trauma surgery. ODRI has been convincingly shown to delay healing, worsen functional outcome and incur significant socio-economic costs. To address this clinical problem, ever more sophisticated technologies targeting the prevention and/or treatment of ODRI are being developed and tested in vitro and in vivo. Among the most commonly described innovations are antimicrobial-coated orthopedic devices, antimicrobial-loaded bone cements and void fillers, and dual osteo-inductive/antimicrobial biomaterials. Unfortunately, translation of these technologies to the clinic has been limited, at least partially due to the challenging and still evolving regulatory environment for antimicrobial drug-device combination products, and a lack of clarity in the burden of proof required in preclinical studies. Preclinical in vivo testing (i.e. animal studies) represents a critical phase of the multidisciplinary effort to design, produce and reliably test both safety and efficacy of any new antimicrobial device. Nonetheless, current in vivo testing protocols, procedures, models, and assessments are highly disparate, irregularly conducted and reported, and without standardization and validation. The purpose of the present opinion piece is to discuss best practices in preclinical in vivo testing of antimicrobial interventions targeting ODRI. By sharing these experience-driven views, we aim to aid others in conducting such studies both for fundamental biomedical research, but also for regulatory and clinical evaluation. © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 37:271-287, 2019.
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Affiliation(s)
- T Fintan Moriarty
- AO Research Institute Davos, Clavadelerstrasse 8, 7270, Davos Platz, Switzerland
| | - Llinos G Harris
- Microbiology and Infectious Diseases, Institute of Life Science, Swansea University Medical School, Swansea, United Kingdom
| | - Robert A Mooney
- Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, Rochester, New York
| | - Joseph C Wenke
- Extremity Trauma and Regenerative Medicine Task Area, US Army Institute of Surgical Research, JBSA-Fort Sam Houston, Texas
| | - Martijn Riool
- Amsterdam UMC, University of Amsterdam, Department of Medical Microbiology, Amsterdam Infection and Immunity Institute, Amsterdam, The Netherlands
| | - Sebastian A J Zaat
- Amsterdam UMC, University of Amsterdam, Department of Medical Microbiology, Amsterdam Infection and Immunity Institute, Amsterdam, The Netherlands
| | - Annette Moter
- Institute of Microbiology and Infection Immunology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Thomas P Schaer
- Department of Clinical Studies New Bolton Center, University of Pennsylvania, Kennett Square, Pennsylvania
| | - Nina Khanna
- Infection Biology Laboratory, Department of Biomedicine, University Hospital of Basel, Basel, Switzerland.,Division of Infectious Diseases and Hospital Epidemiology, University Hospital of Basel, Basel, Switzerland
| | - Richard Kuehl
- Infection Biology Laboratory, Department of Biomedicine, University Hospital of Basel, Basel, Switzerland.,Division of Infectious Diseases and Hospital Epidemiology, University Hospital of Basel, Basel, Switzerland
| | - Volker Alt
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Giessen-Marburg, GmbH, Campus Giessen, Germany
| | | | - Jianfeng Liu
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, P.R. China
| | - Stephan Zeiter
- AO Research Institute Davos, Clavadelerstrasse 8, 7270, Davos Platz, Switzerland
| | - Henk J Busscher
- Department of Biomedical Engineering, University of Groningen and University Medical Center Groningen, Groningen, The Netherlands
| | - David W Grainger
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah, USA.,Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, Utah, USA
| | - R Geoff Richards
- AO Research Institute Davos, Clavadelerstrasse 8, 7270, Davos Platz, Switzerland
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26
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Koppen BC, Mulder PPG, de Boer L, Riool M, Drijfhout JW, Zaat SAJ. Synergistic microbicidal effect of cationic antimicrobial peptides and teicoplanin against planktonic and biofilm-encased Staphylococcus aureus. Int J Antimicrob Agents 2018; 53:143-151. [PMID: 30315918 DOI: 10.1016/j.ijantimicag.2018.10.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 09/07/2018] [Accepted: 10/06/2018] [Indexed: 12/11/2022]
Abstract
Antibiotic resistance and biofilm formation are the main reasons for failure in treatment of bacterial infections. This study aimed to identify synergistic combinations of conventional antibiotics and novel synthetic antimicrobial and antibiofilm peptides (SAAPs) inspired by the structures of the natural human cationic peptides LL-37 and thrombocidin-1 (TC-1). The LL-37-inspired lead peptide SAAP-148 was combined with antibiotics of different classes against Staphylococcus aureus, and showed synergy with teicoplanin. Synergy with teicoplanin was also observed with LL-37, the LL-37-inspired SAAP-276 and the TC-1-inspired TC84. Interestingly, no synergy was observed against Staphylococcus epidermidis. Furthermore, teicoplanin combined with SAAP-148 or SAAP-276 showed strong interaction against S. aureus biofilms. The dltABCD operon and the mprF gene in S. aureus conferred resistance to LL-37, but SAAP-148 proved to be indifferently potent against wild-type, ΔdltA and ΔmprF S. aureus strains. When used alone, relatively high concentrations of both LL-37 and teicoplanin (30-120 µM and 4-32 mg/L, respectively) were required to kill S. aureus. Resistance to LL-37 in S. aureus was overcome by combined use of teicoplanin and LL-37. Thus, teicoplanin potentiates peptide LL-37, enhancing the efficacy of the innate defence, and combining the novel peptides with teicoplanin offers potential for enhanced efficacy of treatment of S. aureus infections, including biofilms.
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Affiliation(s)
- Bruce C Koppen
- Department of Medical Microbiology, Amsterdam Infection and Immunity Institute, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Patrick P G Mulder
- Department of Medical Microbiology, Amsterdam Infection and Immunity Institute, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Leonie de Boer
- Department of Medical Microbiology, Amsterdam Infection and Immunity Institute, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Martijn Riool
- Department of Medical Microbiology, Amsterdam Infection and Immunity Institute, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Jan W Drijfhout
- Department of Immunohaematology and Blood Transfusion, Leiden University Medical Centre, Leiden, The Netherlands
| | - Sebastian A J Zaat
- Department of Medical Microbiology, Amsterdam Infection and Immunity Institute, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
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27
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Zaccaria S, van Gaal RC, Riool M, Zaat SAJ, Dankers PYW. Antimicrobial peptide modification of biomaterials using supramolecular additives. J Polym Sci A Polym Chem 2018; 56:1926-1934. [PMID: 30344368 PMCID: PMC6175361 DOI: 10.1002/pola.29078] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 05/29/2018] [Indexed: 12/11/2022]
Abstract
Biomaterials based on non-active polymers functionalized with antimicrobial agents by covalent modification or mixing are currently regarded as high potential solutions to prevent biomaterial associated infections that are major causes of biomedical device failure. Herewith a strategy is proposed in which antimicrobial materials are prepared by simply mixing-and-matching of ureido-pyrimidinone (UPy) based supramolecular polymers with antimicrobial peptides (AMPs) modified with the same UPy-moiety. The N-terminus of the AMPs was coupled in solution to an UPy-carboxylic acid synthon resulting in formation of a new amidic bond. The UPy-functionalization of the AMPs did not affect their secondary structure, as proved by circular dichroism spectroscopy. The antimicrobial activity of the UPy-AMPs in solution was also retained. In addition, the incorporation of UPy-AMPs into an UPy-polymer was stable and the final material was biocompatible. The addition of 4 mol % of UPy-AMPs in the UPy-polymer material protected against colonization by Escherichia coli, and methicillin-sensitive and -resistant strains of Staphylococcus aureus. This modular approach enables a stable but dynamic incorporation of the antimicrobial agents, allowing at the same time for the possibility to change the nature of the polymer, as well as the use of AMPs with different activity spectra. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 1926-1934.
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Affiliation(s)
- Sabrina Zaccaria
- Laboratory for Chemical BiologyEindhoven University of Technology, P.O. Box 513, 5600 MBEindhovenThe Netherlands
- Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MBEindhovenThe Netherlands
| | - Ronald C. van Gaal
- Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MBEindhovenThe Netherlands
- Laboratory for Cell and Tissue EngineeringEindhoven University of Technology, P.O. Box 513, 5600 MBEindhovenThe Netherlands
| | - Martijn Riool
- Department of Medical MicrobiologyAmsterdam Infection and Immunity Institute, Academic Medical Center, University of Amsterdam, Meibergdreef 15Amsterdam 1105 AZThe Netherlands
| | - Sebastian A. J. Zaat
- Department of Medical MicrobiologyAmsterdam Infection and Immunity Institute, Academic Medical Center, University of Amsterdam, Meibergdreef 15Amsterdam 1105 AZThe Netherlands
| | - Patricia Y. W. Dankers
- Laboratory for Chemical BiologyEindhoven University of Technology, P.O. Box 513, 5600 MBEindhovenThe Netherlands
- Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MBEindhovenThe Netherlands
- Laboratory for Cell and Tissue EngineeringEindhoven University of Technology, P.O. Box 513, 5600 MBEindhovenThe Netherlands
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Riool M, de Breij A, Drijfhout JW, Nibbering PH, Zaat SAJ. Antimicrobial Peptides in Biomedical Device Manufacturing. Front Chem 2017; 5:63. [PMID: 28971093 PMCID: PMC5609632 DOI: 10.3389/fchem.2017.00063] [Citation(s) in RCA: 118] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2017] [Accepted: 08/11/2017] [Indexed: 12/13/2022] Open
Abstract
Over the past decades the use of medical devices, such as catheters, artificial heart valves, prosthetic joints, and other implants, has grown significantly. Despite continuous improvements in device design, surgical procedures, and wound care, biomaterial-associated infections (BAI) are still a major problem in modern medicine. Conventional antibiotic treatment often fails due to the low levels of antibiotic at the site of infection. The presence of biofilms on the biomaterial and/or the multidrug-resistant phenotype of the bacteria further impair the efficacy of antibiotic treatment. Removal of the biomaterial is then the last option to control the infection. Clearly, there is a pressing need for alternative strategies to prevent and treat BAI. Synthetic antimicrobial peptides (AMPs) are considered promising candidates as they are active against a broad spectrum of (antibiotic-resistant) planktonic bacteria and biofilms. Moreover, bacteria are less likely to develop resistance to these rapidly-acting peptides. In this review we highlight the four main strategies, three of which applying AMPs, in biomedical device manufacturing to prevent BAI. The first involves modification of the physicochemical characteristics of the surface of implants. Immobilization of AMPs on surfaces of medical devices with a variety of chemical techniques is essential in the second strategy. The main disadvantage of these two strategies relates to the limited antibacterial effect in the tissue surrounding the implant. This limitation is addressed by the third strategy that releases AMPs from a coating in a controlled fashion. Lastly, AMPs can be integrated in the design and manufacturing of additively manufactured/3D-printed implants, owing to the physicochemical characteristics of the implant material and the versatile manufacturing technologies compatible with antimicrobials incorporation. These novel technologies utilizing AMPs will contribute to development of novel and safe antimicrobial medical devices, reducing complications and associated costs of device infection.
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Affiliation(s)
- Martijn Riool
- Department of Medical Microbiology, Academic Medical Center, Amsterdam Infection and Immunity Institute, University of AmsterdamAmsterdam, Netherlands
| | - Anna de Breij
- Department of Infectious Diseases, Leiden University Medical CenterLeiden, Netherlands
| | - Jan W. Drijfhout
- Department of Immunohematology and Blood Transfusion, Leiden University Medical CenterLeiden, Netherlands
| | - Peter H. Nibbering
- Department of Infectious Diseases, Leiden University Medical CenterLeiden, Netherlands
| | - Sebastian A. J. Zaat
- Department of Medical Microbiology, Academic Medical Center, Amsterdam Infection and Immunity Institute, University of AmsterdamAmsterdam, Netherlands
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van Hengel IAJ, Riool M, Fratila-Apachitei LE, Witte-Bouma J, Farrell E, Zadpoor AA, Zaat SAJ, Apachitei I. Data on the surface morphology of additively manufactured Ti-6Al-4V implants during processing by plasma electrolytic oxidation. Data Brief 2017; 13:385-389. [PMID: 28664174 PMCID: PMC5480885 DOI: 10.1016/j.dib.2017.06.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 05/08/2017] [Accepted: 06/06/2017] [Indexed: 11/27/2022] Open
Abstract
Additively manufactured Ti-6Al-4V implants were biofunctionalized using plasma electrolytic oxidation. At various time points during this process scanning electron microscopy imaging was performed to analyze the surface morphology (van Hengel et al., 2017) [1]. This data shows the changes in surface morphology during plasma electrolytic oxidation. Data presented in this article are related to the research article “Selective laser melting porous metallic implants with immobilized silver nanoparticles kill and prevent biofilm formation by methicillin-resistant Staphylococcus aureus” (van Hengel et al., 2017) [1].
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Affiliation(s)
- Ingmar A J van Hengel
- Department of Biomechanical Engineering, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628 CD Delft, The Netherlands.,Additive Manufacturing Lab, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628 CD Delft, The Netherlands
| | - Martijn Riool
- Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
| | - Lidy E Fratila-Apachitei
- Department of Biomechanical Engineering, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628 CD Delft, The Netherlands.,Additive Manufacturing Lab, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628 CD Delft, The Netherlands
| | - Janneke Witte-Bouma
- Department of Oral and Maxillofacial Surgery, Special Dental Care and Orthodontics, Erasmus MC, University Medical Centre, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
| | - Eric Farrell
- Department of Oral and Maxillofacial Surgery, Special Dental Care and Orthodontics, Erasmus MC, University Medical Centre, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
| | - Amir A Zadpoor
- Department of Biomechanical Engineering, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628 CD Delft, The Netherlands.,Additive Manufacturing Lab, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628 CD Delft, The Netherlands
| | - Sebastian A J Zaat
- Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands
| | - Iulian Apachitei
- Department of Biomechanical Engineering, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628 CD Delft, The Netherlands.,Additive Manufacturing Lab, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628 CD Delft, The Netherlands
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van Hengel IAJ, Riool M, Fratila-Apachitei LE, Witte-Bouma J, Farrell E, Zadpoor AA, Zaat SAJ, Apachitei I. Selective laser melting porous metallic implants with immobilized silver nanoparticles kill and prevent biofilm formation by methicillin-resistant Staphylococcus aureus. Biomaterials 2017. [PMID: 28622569 DOI: 10.1016/j.biomaterials.2017.02.030] [Citation(s) in RCA: 106] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Implant-associated infection and limited longevity are two major challenges that orthopedic devices need to simultaneously address. Additively manufactured porous implants have recently shown tremendous promise in improving bone regeneration and osseointegration, but, as any conventional implant, are threatened by infection. In this study, we therefore used rational design and additive manufacturing in the form of selective laser melting (SLM) to fabricate porous titanium implants with interconnected pores, resulting in a 3.75 times larger surface area than corresponding solid implants. The SLM implants were biofunctionalized by embedding silver nanoparticles in an oxide surface layer grown using plasma electrolytic oxidation (PEO) in Ca/P-based electrolytes. The PEO layer of the SLM implants released silver ions for at least 28 days. X-ray diffraction analysis detected hydroxyapatite on the SLM PEO implants but not on the corresponding solid implants. In vitro and ex vivo assays showed strong antimicrobial activity of these novel SLM PEO silver-releasing implants, without any signs of cytotoxicity. The rationally designed SLM porous implants outperformed solid implants with similar dimensions undergoing the same biofunctionalization treatment. This included four times larger amount of released silver ions, two times larger zone of inhibition, and one additional order of magnitude of reduction in numbers of CFU in an ex vivo mouse infection model.
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Affiliation(s)
- Ingmar A J van Hengel
- Department of Biomechanical Engineering, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628 CD, Delft, The Netherlands; Additive Manufacturing Lab, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628 CD, Delft, The Netherlands
| | - Martijn Riool
- Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Lidy E Fratila-Apachitei
- Department of Biomechanical Engineering, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628 CD, Delft, The Netherlands; Additive Manufacturing Lab, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628 CD, Delft, The Netherlands
| | - Janneke Witte-Bouma
- Department of Oral and Maxillofacial Surgery, Special Dental Care and Orthodontics, Erasmus MC, University Medical Centre, Wytemaweg 80, 3015 CN, Rotterdam, The Netherlands
| | - Eric Farrell
- Department of Oral and Maxillofacial Surgery, Special Dental Care and Orthodontics, Erasmus MC, University Medical Centre, Wytemaweg 80, 3015 CN, Rotterdam, The Netherlands
| | - Amir A Zadpoor
- Department of Biomechanical Engineering, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628 CD, Delft, The Netherlands; Additive Manufacturing Lab, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628 CD, Delft, The Netherlands
| | - Sebastian A J Zaat
- Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Iulian Apachitei
- Department of Biomechanical Engineering, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628 CD, Delft, The Netherlands; Additive Manufacturing Lab, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628 CD, Delft, The Netherlands.
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31
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Riool M, Dirks AJ, Jaspers V, de Boer L, Loontjens TJ, van der Loos CM, Florquin S, Apachitei I, Rijk LN, Keul HA, Zaat SA. A chlorhexidine-releasing epoxy-based coating on titanium implants prevents Staphylococcus aureus experimental biomaterial-associated infection. Eur Cell Mater 2017; 33:143-157. [PMID: 28197990 DOI: 10.22203/ecm.v033a11] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Prevention of biomaterial-associated infections (BAI) remains a challenging problem, in particular due to the increased risk of resistance development with the current antibiotic-based strategies. Metallic orthopaedic devices, such as non-cemented implants, are often inserted under high mechanical stress. These non-cemented implants cannot be protected by e.g. antibioticreleasing bone cement or other antimicrobial approaches, such as the use of bioactive glass. Therefore, in order to avoid abrasion during implantation procedures, we developed an antimicrobial coating with great mechanical stability for orthopaedic implants, to prevent Staphylococcus aureus BAI. We incorporated 5 and 10 wt % chlorhexidine in a novel mechanically stable epoxy-based coating, designated CHX5 and CHX10, respectively. The coatings displayed potent bactericidal activity in vitro against S. aureus, with over 80 % of the release (19 µg/cm2 for CHX5 and 41 µg/cm2 for CHX10) occurring within the first 24 h. In mice, the CHX10 coating significantly reduced the number of CFU (colony forming units), both on the implants and in the peri-implant tissues, 1 d after S. aureus challenge. The CHX10-coated implants were well-tolerated by the animals, with no signs of toxicity observed by histological analysis. Moreover, the coating significantly reduced the frequency of culture-positive tissues 1 d, and of culture-positive implants 1 and 4 d after challenge. In summary, the chlorhexidine-releasing mechanically stable epoxy-based CHX10 coating prevented implant colonisation and S. aureus BAI in mice and has good prospects for clinical development.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - S A Zaat
- Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ, Amsterdam, The
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32
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Fidan S, Muhaffel F, Riool M, Cempura G, de Boer L, Zaat S, Filemonowicz AC, Cimenoglu H. Fabrication of oxide layer on zirconium by micro-arc oxidation: Structural and antimicrobial characteristics. Materials Science and Engineering: C 2017; 71:565-569. [DOI: 10.1016/j.msec.2016.11.035] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 10/02/2016] [Accepted: 11/08/2016] [Indexed: 10/20/2022]
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Moriarty TF, Kuehl R, Coenye T, Metsemakers WJ, Morgenstern M, Schwarz EM, Riool M, Zaat SA, Khana N, Kates SL, Richards RG. Orthopaedic device-related infection: current and future interventions for improved prevention and treatment. EFORT Open Rev 2016; 1:89-99. [PMID: 28461934 PMCID: PMC5367564 DOI: 10.1302/2058-5241.1.000037] [Citation(s) in RCA: 97] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Orthopaedic and trauma device-related infection (ODRI) remains one of the major complications in modern trauma and orthopaedic surgery.Despite best practice in medical and surgical management, neither prophylaxis nor treatment of ODRI is effective in all cases, leading to infections that negatively impact clinical outcome and significantly increase healthcare expenditure.The following review summarises the microbiological profile of modern ODRI, the impact antibiotic resistance has on treatment outcomes, and some of the principles and weaknesses of the current systemic and local antibiotic delivery strategies.The emerging novel strategies aimed at preventing or treating ODRI will be reviewed. Particular attention will be paid to the potential for clinical impact in the coming decades, when such interventions are likely to be critically important.The review focuses on this problem from an interdisciplinary perspective, including basic science innovations and best practice in infectious disease. Cite this article: Moriarty TF, Kuehl R, Coenye T, et al. Orthopaedic device related infection: current and future interventions for improved prevention and treatment. EFORT Open Rev 2016;1:89-99. DOI: 10.1302/2058-5241.1.000037.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Nina Khana
- University Hospital of Basel, Switzerland
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de Breij A, Riool M, Kwakman PHS, de Boer L, Cordfunke RA, Drijfhout JW, Cohen O, Emanuel N, Zaat SAJ, Nibbering PH, Moriarty TF. Prevention of Staphylococcus aureus biomaterial-associated infections using a polymer-lipid coating containing the antimicrobial peptide OP-145. J Control Release 2015; 222:1-8. [PMID: 26658071 DOI: 10.1016/j.jconrel.2015.12.003] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 11/27/2015] [Accepted: 12/01/2015] [Indexed: 10/22/2022]
Abstract
The scarcity of current antibiotic-based strategies to prevent biomaterial-associated infections (BAI) and their risk of resistance development prompted us to develop a novel antimicrobial implant-coating to prevent Staphylococcus aureus-induced BAI. We incorporated the antimicrobial peptide OP-145 into a Polymer-Lipid Encapsulation MatriX (PLEX)-coating to obtain high peptide levels for prolonged periods at the implant-tissue interphase. We first confirmed that OP-145 was highly effective in killing S. aureus and inhibiting biofilm formation in vitro. OP-145 injected along S. aureus-inoculated implants in mice significantly reduced the number of culture-positive implants. OP-145 was released from the PLEX coating in a controlled zero-order kinetic rate after an initial 55%-burst release and displayed bactericidal activity in vitro. In a rabbit intramedullary nail-related infection model, 67% of rabbits with PLEX-OP-145-coated nails had culture-negative nails after 28days compared to 29% of rabbits with uncoated nails. In rabbits with PLEX-OP-145-coated nails, bone and soft tissue samples were culture-negative in 67% and 80%, respectively, whereas all bone samples and 71% of the soft tissue samples of rabbits with uncoated nails were infected. Together, PLEX-OP-145 coatings, of which both compounds have already been found safe in man, can prevent implant colonization and S. aureus-induced BAIs.
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Affiliation(s)
- A de Breij
- Dept. of Infectious Diseases, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, P.O. Box 9600, RC Leiden, The Netherlands.
| | - M Riool
- Dept. of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands
| | - P H S Kwakman
- Dept. of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands
| | - L de Boer
- Dept. of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands
| | - R A Cordfunke
- Dept. of Immunohematology and Blood Transfusion, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, P.O. Box 9600 RC Leiden, the Netherlands
| | - J W Drijfhout
- Dept. of Immunohematology and Blood Transfusion, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, P.O. Box 9600 RC Leiden, the Netherlands
| | - O Cohen
- PolyPid Ltd., 18 Hasivim, St. Petach-Tikva 4959376, Israel
| | - N Emanuel
- PolyPid Ltd., 18 Hasivim, St. Petach-Tikva 4959376, Israel
| | - S A J Zaat
- Dept. of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands
| | - P H Nibbering
- Dept. of Infectious Diseases, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, P.O. Box 9600, RC Leiden, The Netherlands
| | - T F Moriarty
- AO Research Institute Davos, AO Foundation, Clavadelerstrasse 8 Davos Platz, CH7270 Davos, Switzerland
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Metsemakers WJ, Emanuel N, Cohen O, Reichart M, Potapova I, Schmid T, Segal D, Riool M, Kwakman PHS, de Boer L, de Breij A, Nibbering PH, Richards RG, Zaat SAJ, Moriarty TF. A doxycycline-loaded polymer-lipid encapsulation matrix coating for the prevention of implant-related osteomyelitis due to doxycycline-resistant methicillin-resistant Staphylococcus aureus. J Control Release 2015; 209:47-56. [PMID: 25910578 DOI: 10.1016/j.jconrel.2015.04.022] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Revised: 04/17/2015] [Accepted: 04/19/2015] [Indexed: 11/19/2022]
Abstract
Implant-associated bone infections caused by antibiotic-resistant pathogens pose significant clinical challenges to treating physicians. Prophylactic strategies that act against resistant organisms, such as methicillin-resistant Staphylococcus aureus (MRSA), are urgently required. In the present study, we investigated the efficacy of a biodegradable Polymer-Lipid Encapsulation MatriX (PLEX) loaded with the antibiotic doxycycline as a local prophylactic strategy against implant-associated osteomyelitis. Activity was tested against both a doxycycline-susceptible (doxy(S)) methicillin-susceptible S. aureus (MSSA) as well as a doxycycline-resistant (doxy(R)) methicillin-resistant S. aureus (MRSA). In vitro elution studies revealed that 25% of the doxycycline was released from the PLEX-coated implants within the first day, followed by a 3% release per day up to day 28. The released doxycycline was highly effective against doxy(S) MSSA for at least 14days in vitro. A bolus injection of doxycycline mimicking a one day release from the PLEX-coating reduced, but did not eliminate, mouse subcutaneous implant-associated infection (doxy(S) MSSA). In a rabbit intramedullary nail-related infection model, all rabbits receiving a PLEX-doxycycline-coated nail were culture negative in the doxy(S) MSSA-group and the surrounding bone displayed a normal physiological appearance in both histological sections and radiographs. In the doxy(R) MRSA inoculated rabbits, a statistically significant reduction in the number of culture-positive samples was observed for the PLEX-doxycycline-coated group when compared to the animals that had received an uncoated nail, although the reduction in bacterial burden did not reach statistical significance. In conclusion, the PLEX-doxycycline coating on titanium alloy implants provided complete protection against implant-associated MSSA osteomyelitis, and resulted in a significant reduction in the number of culture positive samples when challenged with a doxycycline-resistant MRSA.
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Affiliation(s)
- Willem-Jan Metsemakers
- AO Research Institute Davos, AO Foundation, Clavadelerstrasse 8, Davos Platz CH7270, Switzerland
| | - Noam Emanuel
- PolyPid Ltd., 18 Hasivim St., Petach-Tikva 4959376, Israel
| | - Or Cohen
- PolyPid Ltd., 18 Hasivim St., Petach-Tikva 4959376, Israel
| | - Malka Reichart
- PolyPid Ltd., 18 Hasivim St., Petach-Tikva 4959376, Israel
| | - Inga Potapova
- AO Research Institute Davos, AO Foundation, Clavadelerstrasse 8, Davos Platz CH7270, Switzerland
| | - Tanja Schmid
- AO Research Institute Davos, AO Foundation, Clavadelerstrasse 8, Davos Platz CH7270, Switzerland
| | - David Segal
- PolyPid Ltd., 18 Hasivim St., Petach-Tikva 4959376, Israel
| | - Martijn Riool
- Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands
| | - Paulus H S Kwakman
- Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands
| | - Leonie de Boer
- Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands
| | - Anna de Breij
- Department of Infectious Diseases, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - Peter H Nibbering
- Department of Infectious Diseases, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - R Geoff Richards
- AO Research Institute Davos, AO Foundation, Clavadelerstrasse 8, Davos Platz CH7270, Switzerland
| | - Sebastian A J Zaat
- Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands
| | - T Fintan Moriarty
- AO Research Institute Davos, AO Foundation, Clavadelerstrasse 8, Davos Platz CH7270, Switzerland.
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Cleophas RTC, Riool M, Quarles van Ufford H(LC, Zaat SAJ, Kruijtzer JAW, Liskamp RMJ. Convenient Preparation of Bactericidal Hydrogels by Covalent Attachment of Stabilized Antimicrobial Peptides Using Thiol-ene Click Chemistry. ACS Macro Lett 2014; 3:477-480. [PMID: 35590786 DOI: 10.1021/mz5001465] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This report describes the design and synthesis of a bactericidal poly(ethylene glycol)-based (PEG) hydrogel coating with covalently attached antimicrobial peptides (AMP) stabilized against proteolytic degradation. As such, mimics of the highly active AMP HHC10 (H-KRWWKWIRW-NH2) were designed for optimal stability in human serum while retaining strong antimicrobial activity against Staphylococcus aureus and Staphylococcus epidermidis, the major causative agents of biomaterial associated infection. In order to investigate the selectivity of the AMPs, their hemolytic activity was determined. A N-terminal cysteine facilitated thiol-ene chemistry for a fast, single-step immobilization/photopolymerization strategy. The antimicrobial activity of the resulting thin layer hydrogel coating on a PET surface was established using the Japanese Industrial Standard (JIS) Z2801 assay, showing complete killing (>99.9%) of inocula of S. aureus ATCC 49230, S. epidermidis ATCC 35984, and E. coli ATCC 8739.
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Affiliation(s)
- Rik T. C. Cleophas
- Department
of Medicinal Chemistry and Chemical Biology, Utrecht Institute for
Pharmaceutical Sciences, Faculty of Science, Utrecht University, Universiteitsweg 99, 3584 CG, 3584 CA, Utrecht, The Netherlands
| | - Martijn Riool
- Department
of Medical Microbiology, Center for Infection and Immunity Amsterdam
(CINIMA), Academic Medical Center, University of Amsterdam, Meibergdreef
15, 1105 AZ Amsterdam, The Netherlands
| | - H. (Linda) C. Quarles van Ufford
- Department
of Medicinal Chemistry and Chemical Biology, Utrecht Institute for
Pharmaceutical Sciences, Faculty of Science, Utrecht University, Universiteitsweg 99, 3584 CG, 3584 CA, Utrecht, The Netherlands
| | - Sebastian A. J. Zaat
- Department
of Medical Microbiology, Center for Infection and Immunity Amsterdam
(CINIMA), Academic Medical Center, University of Amsterdam, Meibergdreef
15, 1105 AZ Amsterdam, The Netherlands
| | - John A. W. Kruijtzer
- Department
of Medicinal Chemistry and Chemical Biology, Utrecht Institute for
Pharmaceutical Sciences, Faculty of Science, Utrecht University, Universiteitsweg 99, 3584 CG, 3584 CA, Utrecht, The Netherlands
| | - Rob M. J. Liskamp
- Department
of Medicinal Chemistry and Chemical Biology, Utrecht Institute for
Pharmaceutical Sciences, Faculty of Science, Utrecht University, Universiteitsweg 99, 3584 CG, 3584 CA, Utrecht, The Netherlands
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Tessadori F, Zeng K, Manders E, Riool M, Jackson D, van Driel R. Stable S/MAR-based episomal vectors are regulated at the chromatin level. Chromosome Res 2010; 18:757-75. [PMID: 21080054 PMCID: PMC2996544 DOI: 10.1007/s10577-010-9165-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2010] [Revised: 10/23/2010] [Accepted: 10/25/2010] [Indexed: 02/02/2023]
Abstract
Episomal vectors assembled from defined genetic components are a promising alternative to traditional gene therapy vectors that integrate in the host genome and may cause insertional mutations. The vector pEPI-eGFP is stably retained in the episomal state in cultured mammalian cells at low copy number for many generations without integration into the host genome. Although pEPI-eGFP is a fully engineered vector, little is known about how it interacts with the host genome and about the molecular mechanisms that are responsible for its transcriptional activity. We have analyzed the expression of the episomal reporter gene eGFP under conditions that affect the chromatin state of the genome. We have also constructed pEPI derivatives carrying a tandem array of lac operator sequences, which allows in vivo visualization and manipulation of the chromatin state of the episome. We show that changes in chromatin state of both the host and pEPI-eGFP induces changes in episomal gene activity and influences the episome’s nuclear distributions. We conclude that episomal genes are subject to control systems of the host, similarly to their counterparts in the host genome.
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Affiliation(s)
- Federico Tessadori
- Swammerdam Institute for Life Sciences, University of Amsterdam, P.O. Box 94215, 1090GE, Amsterdam, The Netherlands.
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Affiliation(s)
| | - CAN Broekhuizen
- Department of Medical Microbiology, Center for Infection & Immunity Amsterdam (CINIMA), Academic Medical Center, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands
| | - M Riool
- Department of Medical Microbiology, Center for Infection & Immunity Amsterdam (CINIMA), Academic Medical Center, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands
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