51
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Brandenburg KS, Calderon DF, Kierski PR, Brown AL, Shah NM, Abbott NL, Schurr MJ, Murphy CJ, McAnulty JF, Czuprynski CJ. Inhibition of Pseudomonas aeruginosa biofilm formation on wound dressings. Wound Repair Regen 2015; 23:842-54. [PMID: 26342168 DOI: 10.1111/wrr.12365] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Revised: 07/31/2015] [Accepted: 09/02/2015] [Indexed: 01/19/2023]
Abstract
Chronic nonhealing skin wounds often contain bacterial biofilms that prevent normal wound healing and closure and present challenges to the use of conventional wound dressings. We investigated inhibition of Pseudomonas aeruginosa biofilm formation, a common pathogen of chronic skin wounds, on a commercially available biological wound dressing. Building on prior reports, we examined whether the amino acid tryptophan would inhibit P. aeruginosa biofilm formation on the three-dimensional surface of the biological dressing. Bacterial biomass and biofilm polysaccharides were quantified using crystal violet staining or an enzyme linked lectin, respectively. Bacterial cells and biofilm matrix adherent to the wound dressing were visualized through scanning electron microscopy. D-/L-tryptophan inhibited P. aeruginosa biofilm formation on the wound dressing in a dose dependent manner and was not directly cytotoxic to immortalized human keratinocytes although there was some reduction in cellular metabolism or enzymatic activity. More importantly, D-/L-tryptophan did not impair wound healing in a splinted skin wound murine model. Furthermore, wound closure was improved when D-/L-tryptophan treated wound dressing with P. aeruginosa biofilms were compared with untreated dressings. These findings indicate that tryptophan may prove useful for integration into wound dressings to inhibit biofilm formation and promote wound healing.
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Affiliation(s)
- Kenneth S Brandenburg
- Department of Pathobiological Sciences, University of Wisconsin-Madison, Madison, Wisconsin
| | - Diego F Calderon
- Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Patricia R Kierski
- Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Amanda L Brown
- Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Nihar M Shah
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California-Davis, Davis, California
| | - Nicholas L Abbott
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin
| | - Michael J Schurr
- Mission Trauma Services, Mission Medical Associates, Mission Memorial Hospital, Asheville, North Carolina
| | - Christopher J Murphy
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California-Davis, Davis, California.,Department of Ophthalmology & Vision Science, School of Medicine, University of California-Davis, Davis, California
| | - Jonathan F McAnulty
- Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin
| | - Charles J Czuprynski
- Department of Pathobiological Sciences, University of Wisconsin-Madison, Madison, Wisconsin
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52
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Gentile P, Carmagnola I, Nardo T, Chiono V. Layer-by-layer assembly for biomedical applications in the last decade. NANOTECHNOLOGY 2015; 26:422001. [PMID: 26421916 DOI: 10.1088/0957-4484/26/42/422001] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
In the past two decades, the design and manufacture of nanostructured materials has been of tremendous interest to the scientific community for their application in the biomedical field. Among the available techniques, layer-by-layer (LBL) assembly has attracted considerable attention as a convenient method to fabricate functional coatings. Nowadays, more than 1000 scientific papers are published every year, tens of patents have been deposited and some commercial products based on LBL technology have become commercially available. LBL presents several advantages, such as (1): a precise control of the coating properties; (2) environmentally friendly, mild conditions and low-cost manufacturing; (3) versatility for coating all available surfaces; (4) obtainment of homogeneous film with controlled thickness; and (5) incorporation and controlled release of biomolecules/drugs. This paper critically reviews the scientific challenge of the last 10 years--functionalizing biomaterials by LBL to obtain appropriate properties for biomedical applications, in particular in tissue engineering (TE). The analysis of the state-of-the-art highlights the current techniques and the innovative materials for scaffold and medical device preparation that are opening the way for the preparation of LBL-functionalized substrates capable of modifying their surface properties for modulating cell interaction to improve substitution, repair or enhancement of tissue function.
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Affiliation(s)
- P Gentile
- School of Clinical Dentistry, University of Sheffield, 19 Claremont Crescent, Sheffield S10 2TA, UK
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53
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Reyes-Ortega F, Cifuentes A, Rodríguez G, Aguilar MR, González-Gómez Á, Solis R, García-Honduvilla N, Buján J, García-Sanmartin J, Martínez A, Román JS. Bioactive bilayered dressing for compromised epidermal tissue regeneration with sequential activity of complementary agents. Acta Biomater 2015; 23:103-115. [PMID: 26022967 DOI: 10.1016/j.actbio.2015.05.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Revised: 05/08/2015] [Accepted: 05/11/2015] [Indexed: 10/23/2022]
Abstract
The article deals with the design, preparation, and evaluation of a new bilayered dressing for application in the healing of compromised wounds. The system is based on the sequential release of two complementary bioactive components to enhance the activation of the regeneration of dermal tissue. The internal layer is a highly hydrophilic and biodegradable film of gelatin and hyaluronic acid (HG), crosslinked with the natural compound genipin, which reacts with the amine groups of gelatin. This film is loaded with the proangiogenic, anti-inflammatory, and antibacterial peptide, proadrenomedullin N-terminal 20 peptide (PAMP), that is released slowly in the wound site. The external layer, more stable and less hydrophilic, is constituted by a biodegradable polyurethane derived from poly(caprolactone) and pluronic L61. This layer is loaded with resorbable nanoparticles of bemiparin (a fractionated low molecular weight heparin), which promotes the activation of growth factors, FGF and VEGF, and provides a good biomechanical stability and controlled permeability of the bilayered dressing. Experiments carried out in mice demonstrate the excellent angiogenic effect of the HG film in the dermal tissue. Application of the bilayered dressing in the wound healing rabbit ear model shows an improved cicatrization of the wound in both ischemic and non-ischemic defects, favoring epithelialization and reducing noticeably the contraction and the inflammation.
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54
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Wakshlak RBK, Pedahzur R, Avnir D. Antibacterial activity of silver-killed bacteria: the "zombies" effect. Sci Rep 2015; 5:9555. [PMID: 25906433 PMCID: PMC5386105 DOI: 10.1038/srep09555] [Citation(s) in RCA: 108] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Accepted: 03/03/2015] [Indexed: 11/25/2022] Open
Abstract
We report a previously unrecognized mechanism for the prolonged action of biocidal agents, which we denote as the zombies effect: biocidally-killed bacteria are capable of killing living bacteria. The concept is demonstrated by first killing Pseudomonas aeruginosa PAO1 with silver nitrate and then challenging, with the dead bacteria, a viable culture of the same bacterium: Efficient antibacterial activity of the killed bacteria is observed. A mechanism is suggested in terms of the action of the dead bacteria as a reservoir of silver, which, due to Le-Chatelier's principle, is re-targeted to the living bacteria. Langmuirian behavior, as well as deviations from it, support the proposed mechanism.
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Affiliation(s)
- Racheli Ben-Knaz Wakshlak
- Institute of Chemistry and the Center for Nanoscience and Nanotechnology, the Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Rami Pedahzur
- 1] Institute of Chemistry and the Center for Nanoscience and Nanotechnology, the Hebrew University of Jerusalem, Jerusalem 91904, Israel [2] Department of Environmental Health, Hadassah Academic College, Jerusalem 91010, Israel
| | - David Avnir
- Institute of Chemistry and the Center for Nanoscience and Nanotechnology, the Hebrew University of Jerusalem, Jerusalem 91904, Israel
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55
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Hamerly T, H. Butler M, T. Fisher S, K. Hilmer J, A. James G, Bothner B. Mass Spectrometry Imaging of Chlorhexidine and Bacteria in a Model Wound. AIMS MEDICAL SCIENCE 2015. [DOI: 10.3934/medsci.2015.3.150] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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56
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Zhang L, Ning C, Zhou T, Liu X, Yeung KWK, Zhang T, Xu Z, Wang X, Wu S, Chu PK. Polymeric nanoarchitectures on Ti-based implants for antibacterial applications. ACS APPLIED MATERIALS & INTERFACES 2014; 6:17323-17345. [PMID: 25233376 DOI: 10.1021/am5045604] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Because of the excellent mechanical properties and good biocompatibility, titanium-based metals are widely used in hard tissue repair, especially load-bearing orthopedic applications. However, bacterial infection and complication during and after surgery often causes failure of the metallic implants. To endow titanium-based implants with antibacterial properties, surface modification is one of the effective strategies. Possessing the unique organic structure composed of molecular and functional groups resembling those of natural organisms, functionalized polymeric nanoarchitectures enhance not only the antibacterial performance but also other biological functions that are difficult to accomplish on many conventional bioinert metallic implants. In this review, recent advance in functionalized polymeric nanoarchitectures and the associated antimicrobial mechanisms are reviewed.
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Affiliation(s)
- Long Zhang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Province Key Laboratory of Industrial Biotechnology, Faculty of Materials Science & Engineering, Hubei University , Wuhan, China
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57
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Volodina KV, Solov'eva NL, Vinogradov VV, Sobolev VE, Vinogradov AV, Vinogradov VV. A synergistic biocomposite for wound healing and decreasing scar size based on sol–gel alumina. RSC Adv 2014. [DOI: 10.1039/c4ra09015b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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58
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Three-dimensional biomaterial degradation — Material choice, design and extrinsic factor considerations. Biotechnol Adv 2014; 32:984-99. [DOI: 10.1016/j.biotechadv.2014.04.014] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2014] [Revised: 04/18/2014] [Accepted: 04/30/2014] [Indexed: 11/20/2022]
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59
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Chang CH, Yeh SY, Lee BH, Hsu CW, Chen YC, Chen CJ, Lin TJ, Hung-Chih Chen M, Huang CT, Chen HY. Compatibility balanced antibacterial modification based on vapor-deposited parylene coatings for biomaterials. J Mater Chem B 2014; 2:8496-8503. [DOI: 10.1039/c4tb00992d] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An advanced antibacterial modification technique is conducted by immobilizing antibacterial agents to reduce bacterial attachment and show balanced biocompatibility.
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Affiliation(s)
- Chih-Hao Chang
- Department of Orthopedic Surgery
- National Taiwan University Hospital and National Taiwan University College of Medicine
- Taipei 10018, Taiwan
| | - Shu-Yun Yeh
- Department of Chemical Engineering
- National Taiwan University
- Taipei 10617, Taiwan
| | - Bing-Heng Lee
- Department of Orthopedic Surgery
- National Taiwan University Hospital and National Taiwan University College of Medicine
- Taipei 10018, Taiwan
| | - Che-Wei Hsu
- Department of Orthopedic Surgery
- National Taiwan University Hospital and National Taiwan University College of Medicine
- Taipei 10018, Taiwan
| | - Yung-Chih Chen
- Department of Chemical Engineering
- National Taiwan University
- Taipei 10617, Taiwan
| | - Chia-Jie Chen
- Department of Orthopedic Surgery
- National Taiwan University Hospital and National Taiwan University College of Medicine
- Taipei 10018, Taiwan
| | - Ting-Ju Lin
- Department of Chemical Engineering
- National Taiwan University
- Taipei 10617, Taiwan
| | - Mark Hung-Chih Chen
- Department of Orthopedic Surgery
- National Taiwan University Hospital and National Taiwan University College of Medicine
- Taipei 10018, Taiwan
| | - Ching-Tsan Huang
- Department of Biochemical Science and Technology
- National Taiwan University
- Taipei 10617, Taiwan
| | - Hsien-Yeh Chen
- Department of Chemical Engineering
- National Taiwan University
- Taipei 10617, Taiwan
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60
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Xie Z, Paras CB, Weng H, Punnakitikashem P, Su LC, Vu K, Tang L, Yang J, Nguyen KT. Dual growth factor releasing multi-functional nanofibers for wound healing. Acta Biomater 2013; 9:9351-9. [PMID: 23917148 DOI: 10.1016/j.actbio.2013.07.030] [Citation(s) in RCA: 279] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Revised: 07/08/2013] [Accepted: 07/24/2013] [Indexed: 01/01/2023]
Abstract
The objective of this research is to develop a dual growth factor-releasing nanoparticle-in-nanofiber system for wound healing applications. In order to mimic and promote the natural healing procedure, chitosan and poly(ethylene oxide) were electrospun into nanofibrous meshes as mimics of extracellular matrix. Vascular endothelial growth factor (VEGF) was loaded within nanofibers to promote angiogenesis in the short term. In addition, platelet-derived growth factor-BB (PDGF-BB) encapsulated poly(lactic-co-glycolic acid) nanoparticles were embedded inside nanofibers to generate a sustained release of PDGF-BB for accelerated tissue regeneration and remodeling. In vitro studies revealed that our nanofibrous composites delivered VEGF quickly and PDGF-BB in a relayed manner, supported fibroblast growth and exhibited anti-bacterial activities. A preliminary in vivo study performed on normal full thickness rat skin wound models demonstrated that nanofiber/nanoparticle scaffolds significantly accelerated the wound healing process by promoting angiogenesis, increasing re-epithelialization and controlling granulation tissue formation. For later stages of healing, evidence also showed quicker collagen deposition and earlier remodeling of the injured site to achieve a faster full regeneration of skin compared to the commercial Hydrofera Blue® wound dressing. These results suggest that our nanoparticle-in-nanofiber system could provide a promising treatment for normal and chronic wound healing.
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Affiliation(s)
- Zhiwei Xie
- Department of Bioengineering, Materials Research Institute, The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA 16802, USA; Department of Bioengineering, The University of Texas at Arlington, Arlington, TX 76019, USA
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61
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Xiao Y, Fan Y, Wang W, Gu H, Zhou N, Shen J. Novel GO-COO-β-CD/CA inclusion: its blood compatibility, antibacterial property and drug delivery. Drug Deliv 2013; 21:362-9. [DOI: 10.3109/10717544.2013.846997] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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62
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Barbour ME, Maddocks SE, Wood NJ, Collins AM. Synthesis, characterization, and efficacy of antimicrobial chlorhexidine hexametaphosphate nanoparticles for applications in biomedical materials and consumer products. Int J Nanomedicine 2013; 8:3507-19. [PMID: 24092973 PMCID: PMC3787925 DOI: 10.2147/ijn.s50140] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Chlorhexidine (CHX) is an antimicrobial agent that is efficacious against gram-negative and -positive bacteria and yeasts. Its mechanism of action is based on cell membrane disruption and, as such, it does not promote the development of bacterial resistance, which is associated with the widespread use of antibiotics. In this manuscript, we report the development of novel antimicrobial nanoparticles (NPs) based on a hexametaphosphate salt of CHX. These are synthesized by instantaneous reaction between equimolar aqueous solutions of CHX digluconate and sodium hexametaphosphate, under room temperature and pressure. The reaction results in a stable colloid composed of highly negatively charged NPs (−50 mV), of size 20–160 nm. The NPs adhere rapidly to specimens of glass, titanium, and an elastomeric wound dressing, in a dose-dependent manner. The functionalized materials exhibit a gradual leaching of soluble CHX over a period of at least 50 days. The NP colloid is efficacious against methicillin-resistant Staphylococcus aureus (MRSA) and Pseudomonas aeruginosa in both planktonic and biofilm conditions. These NPs may find application in a range of biomedical and consumer materials.
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Affiliation(s)
- Michele E Barbour
- Oral Nanoscience, School of Oral and Dental Sciences, University of Bristol, Bristol, UK
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63
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Ben-Knaz R, Pedahzur R, Avnir D. Bioactive doped metals: high synergism in the bactericidal activity of chlorhexidine@silver towards wound pathogenic bacteria. RSC Adv 2013. [DOI: 10.1039/c3ra41196f] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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