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Abdel Khalek MA, Abdelhameed AM, Abdel Gaber SA. The Use of Photoactive Polymeric Nanoparticles and Nanofibers to Generate a Photodynamic-Mediated Antimicrobial Effect, with a Special Emphasis on Chronic Wounds. Pharmaceutics 2024; 16:229. [PMID: 38399283 PMCID: PMC10893342 DOI: 10.3390/pharmaceutics16020229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 01/28/2024] [Accepted: 01/31/2024] [Indexed: 02/25/2024] Open
Abstract
This review is concerned with chronic wounds, with an emphasis on biofilm and its complicated management process. The basics of antimicrobial photodynamic therapy (PDT) and its underlying mechanisms for microbial eradication are presented. Intrinsically active nanocarriers (polydopamine NPs, chitosan NPs, and polymeric micelles) that can further potentiate the antimicrobial photodynamic effect are discussed. This review also delves into the role of photoactive electrospun nanofibers, either in their eluting or non-eluting mode of action, in microbial eradication and accelerating the healing of wounds. Synergic strategies to augment the PDT-mediated effect of photoactive nanofibers are reviewed.
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Affiliation(s)
- Mohamed A. Abdel Khalek
- Institute of Nanoscience and Nanotechnology, Kafrelsheikh University, Kafrelsheikh 33516, Egypt
| | - Amr M. Abdelhameed
- Institute of Global Health and Human Ecology, School of Sciences & Engineering, The American University in Cairo, Cairo 11385, Egypt
- Bioscience Research Laboratories Department, MARC for Medical Services and Scientific Research, Giza 11716, Egypt
| | - Sara A. Abdel Gaber
- Nanomedicine Department, Institute of Nanoscience and Nanotechnology, Kafrelsheikh University, Kafrelsheikh 33516, Egypt
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Abo-Neima SE, El-Sheekh MM, Al-Zaban MI, El-Sayed AIM. Antibacterial and anti-corona virus (229E) activity of Nigella sativa oil combined with photodynamic therapy based on methylene blue in wound infection: in vitro and in vivo study. BMC Microbiol 2023; 23:274. [PMID: 37773101 PMCID: PMC10540405 DOI: 10.1186/s12866-023-03018-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 09/12/2023] [Indexed: 09/30/2023] Open
Abstract
Microbial skin infections, antibiotic resistance, and poor wound healing are major problems, and new treatments are needed. Our study targeted solving this problem with Nigella sativa (NS) oil and photodynamic therapy based on methylene blue (MB-PDT). Antibacterial activity and minimum inhibitory concentration (MIC) were determined via agar well diffusion assay and broth microdilution, respectively. Transmission electron microscopy (TEM) proved deformations in Staphylococcus aureus ATCC 6538. Gas chromatography-mass spectrometry identified useful compounds that were suggested to be responsible for the potency of the oil. NS oil was tested as an antivirus against low pathogenic coronavirus (229E). Therapies examined, MB-PDT, NS, and MB-PDT + NS oil, to accelerate wound healing. The antibacterial efficacy against S. aureus was promising, with a MIC of 12.5% and TEM showing injured cells treated with NS oil. This oil inhibited 229E virus up to 42.85% and 32.14%. All tested therapies were successful in accelerating wound healing. The most successful was combined therapy (MB-PDT + NS oil), with a faster healing time. The combined therapy (MB-PDT + NS oil) reduced bacterial counts, which may be a key factor in accelerating wound healing. Skin wound histology was investigated; blood hematology and biochemical analysis did not change significantly after the safe combination treatment. A combination treatment could facilitate healing in a simple and inexpensive way in the future. Based on the results of the in vitro and in vivo studies, it was determined that NS oil had antibacterial and anti-corona virus activity when used in conjunction with photodynamic treatment based on methylene blue to treat wound infections.
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Affiliation(s)
- Sahar E Abo-Neima
- Physics Department, Faculty of Science, Damanhour University, Damanhour, El-Beheira, Egypt
| | - Mostafa M El-Sheekh
- Botany Department, Faculty of Science, Tanta University, Tanta, 31527, Egypt.
| | - Mayasar I Al-Zaban
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, P.O.Box 84428, 11671, Riyadh, Saudi Arabia
| | - Abeer I M El-Sayed
- Botany and Microbiology Department, Faculty of Science, Damanhour University, Damanhour, El-Beheira, Egypt
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Youssef D, Fekry O, Badr A, Afify A, Hamed E. A new perspective on quantitative assessment of photodynamic therapy mediated hydrogel nanocomposite in wound healing using objective biospeckle and morphological local-gradient. Comput Biol Med 2023; 163:107196. [PMID: 37356291 DOI: 10.1016/j.compbiomed.2023.107196] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 06/03/2023] [Accepted: 06/19/2023] [Indexed: 06/27/2023]
Abstract
Skin wounding is a serious public health issue, especially when considering factors that accelerate tissue recovery. Consequently, the use of photodynamic therapy (PDT) as an effective wound-healing treatment has attracted more scientific attention. Although assessing the wound healing rate is crucial for appropriate monitoring of the probability of wound healing and evaluating the treatment efficiency, the currently used techniques lack the ability to provide such information. Therefore, this study has two aims, first, it contributes to the development of a new image-guided biospeckle system for quantitative monitoring of skin wound healing rate. Second, it evaluates the potential of using a novel synthesized PDT-mediated polyethylene glycol fabric with methylene blue (PEG-MB) hydrogel nanocomposite in accelerating wound healing. The proposed imaging system initially acquires raw biospeckle images from the wound regions of adult healthy albino mice treated with the synthesized hydrogel nanocomposite. Each raw biospeckle image is then converted into maps of morphological local-gradient matrices implemented from the combination of dilation and erosion operations at different radii up to 25 pixels. Subsequently, their intensity histogram statistics are computed, taking central moments as the feature set. Final characterization is achieved via a linear combination of the biospeckle statistics maintaining as much variance as possible using principal component analysis (PCA). The results confirmed by cytokine concentration measurement and histological investigation demonstrate that the innovative biospeckle image-guided system is ideal for investigating wound healing and suggest the potential of the hydrogel nanocomposite as an active dressing.
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Affiliation(s)
- Doaa Youssef
- Department of Engineering Applications of Lasers, National Institute of Laser Enhanced Sciences, Cairo University, Egypt.
| | - Osama Fekry
- Department of Medical Applications of Lasers, National Institute of Laser Enhanced Sciences, Cairo University, Egypt
| | - Abeer Badr
- Department of Zoology, Faculty of Science, Cairo University, Egypt
| | - Ahmed Afify
- Department of Zoology, Faculty of Science, Cairo University, Egypt
| | - Eman Hamed
- Department of Zoology, Faculty of Science, Cairo University, Egypt
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Benedito Machado G, Montovam Monteiro C, Gonçalves JMLA, Pavani C. Enhancing Antimicrobial Photodynamic Therapy with Phenothiazinium Dyes and Sodium Dodecyl Sulfate Against Candida Albicans at Various Growth Stages. Photodiagnosis Photodyn Ther 2023:103628. [PMID: 37230408 DOI: 10.1016/j.pdpdt.2023.103628] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 05/20/2023] [Accepted: 05/22/2023] [Indexed: 05/27/2023]
Abstract
BACKGROUND The eradication of C. albicans is difficult due to the organization of the yeast in biofilms. Photodynamic therapy (PDT) has been proposed as an alternative to antifungals. Phenothiazinium dyes, e.g. methylene blue (MB), have been proposed as photosensitizing agents (PS), and their association with sodium dodecyl sulfate (SDS) has recently been shown to improve the effectiveness of PDT in planktonic culture. In this sense, the objective of this work was to evaluate the effect of PDT with phenothiazinium dyes associated to SDS in biofilms at the different stages of growth. METHODS Experiments were carried out to evaluate the effects of PDT on biofilm formation and on established biofilms of C. albicans ATCC 10231. Samples were exposed to PS 50 mg/L (MB, Azure A - AA, Azure B - AB and dimethyl methylene blue - DMMB) dissolved in water or 0.25% SDS, for 5 minutes in the dark. After irradiation at 660 nm, 37.3mW/cm2 for 27 minutes, 60.4J/cm2 colony forming units count assay (CFU/mL) was performed. One or two irradiations were applied. Statistical methods were used to assess effectiveness. RESULTS PSs showed low toxicity in the dark. An application of PDT irradiation was not able to reduce the CFU/mL both in mature biofilms (24h) and in biofilms in the dispersion phase (48h), only in the adherence phase did PDT prevent the formation of biofilms. With two successive applications of PDT irradiation in the dispersion phase, PDT with MB, AA, and DMMB completely inactivated C. albicans. The similar was not observed with mature biofilms. CONCLUSIONS Different stages of biofilm growth respond differently to PDT, with the greatest inhibitory effect found in the adhesion stage. Mature and dispersed biofilms are less susceptible to PDT. The use of two successive applications of PDT with PSs associated with SDS may be a useful approach to inactivate C. albicans biofilms.
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Affiliation(s)
- Gabriela Benedito Machado
- Postgraduate Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho - UNINOVE, Rua Vergueiro 235-249, 01504-001, São Paulo, SP, Brazil.
| | - Carolina Montovam Monteiro
- Postgraduate Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho - UNINOVE, Rua Vergueiro 235-249, 01504-001, São Paulo, SP, Brazil.
| | - José Marcelo Lacerda Alves Gonçalves
- Postgraduate Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho - UNINOVE, Rua Vergueiro 235-249, 01504-001, São Paulo, SP, Brazil.
| | - Christiane Pavani
- Postgraduate Program in Biophotonics Applied to Health Sciences, Universidade Nove de Julho - UNINOVE, Rua Vergueiro 235-249, 01504-001, São Paulo, SP, Brazil.
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Piksa M, Lian C, Samuel IC, Pawlik KJ, Samuel IDW, Matczyszyn K. The role of the light source in antimicrobial photodynamic therapy. Chem Soc Rev 2023; 52:1697-1722. [PMID: 36779328 DOI: 10.1039/d0cs01051k] [Citation(s) in RCA: 74] [Impact Index Per Article: 74.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
Antimicrobial photodynamic therapy (APDT) is a promising approach to fight the growing problem of antimicrobial resistance that threatens health care, food security and agriculture. APDT uses light to excite a light-activated chemical (photosensitiser), leading to the generation of reactive oxygen species (ROS). Many APDT studies confirm its efficacy in vitro and in vivo against bacteria, fungi, viruses and parasites. However, the development of the field is focused on exploring potential targets and developing new photosensitisers. The role of light, a crucial element for ROS production, has been neglected. What are the main parameters essential for effective photosensitiser activation? Does an optimal light radiant exposure exist? And finally, which light source is best? Many reports have described the promising antibacterial effects of APDT in vitro, however, its application in vivo, especially in clinical settings remains very limited. The restricted availability may partially be due to a lack of standard conditions or protocols, arising from the diversity of selected photosensitising agents (PS), variable testing conditions including light sources used for PS activation and methods of measuring anti-bacterial activity and their effectiveness in treating bacterial infections. We thus sought to systematically review and examine the evidence from existing studies on APDT associated with the light source used. We show how the reduction of pathogens depends on the light source applied, radiant exposure and irradiance of light used, and type of pathogen, and so critically appraise the current state of development of APDT and areas to be addressed in future studies. We anticipate that further standardisation of the experimental conditions will help the field advance, and suggest key optical and biological parameters that should be reported in all APDT studies. More in vivo and clinical studies are needed and are expected to be facilitated by advances in light sources, leading to APDT becoming a sustainable, alternative therapeutic option for bacterial and other microbial infections in the future.
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Affiliation(s)
- Marta Piksa
- Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Science, Weigla 12, 53-114, Wroclaw, Poland
| | - Cheng Lian
- Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews, Fife, KY16 9SS, UK.
| | - Imogen C Samuel
- School of Medicine, University of Manchester, Manchester, M13 9PL, UK
| | - Krzysztof J Pawlik
- Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Science, Weigla 12, 53-114, Wroclaw, Poland
| | - Ifor D W Samuel
- Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews, Fife, KY16 9SS, UK.
| | - Katarzyna Matczyszyn
- Institute of Advanced Materials, Faculty of Chemistry, Wroclaw University of Science and Technology, Wyb. Wyspianskiego 27, 50-370 Wroclaw, Poland.
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Photothermally Controlled Drug Release of Poly(d,l-lactide) Nanofibers Loaded with Indocyanine Green and Curcumin for Efficient Antimicrobial Photodynamic Therapy. Pharmaceutics 2023; 15:pharmaceutics15020327. [PMID: 36839649 PMCID: PMC9963466 DOI: 10.3390/pharmaceutics15020327] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/12/2023] [Accepted: 01/16/2023] [Indexed: 01/20/2023] Open
Abstract
Chronic wound infections with antibiotic-resistant bacteria have become a significant problem for modern healthcare systems since they are often associated with high costs and require profound topical wound management. Successful wound healing is achieved by reducing the bacterial load of the wound and providing an environment that enhances cell growth. In this context, nanofibers show remarkable success because their structure offers a promising drug delivery platform that can mimic the native extracellular matrix and accelerate cell proliferation. In our study, single-needle electrospinning, a versatile and cost-efficient technique, was used to shape polymers into an applicable and homogeneous fleece capable of a photothermally triggered drug release. It was combined with antimicrobial photodynamic therapy, a promising procedure against resistant bacteria. Therefore, poly(d,l-lactide) nanofibers loaded with curcumin and indocyanine green (ICG) were produced for local antimicrobial treatment. The mesh had a homogeneous structure, and the nanofibers showed a smooth surface. Recordings with a thermal camera showed that near-infrared light irradiation of ICG increased the temperature (>44 °C) in the surrounding medium. Release studies confirmed more than 29% enhanced curcumin release triggered by elevated temperature. The antimicrobial activity was tested against the gram-positive strain Staphylococcus saprophyticus subsp. bovis and the gram-negative strain Escherichia coli DH5 alpha. The nanofibers loaded with both photosensitizers and irradiated with both wavelengths reduced the bacterial viability (~4.4 log10, 99.996%) significantly more than the nanofibers loaded with only one photosensitizer (<1.7 log10, 97.828%) or irradiated with only one wavelength (<2.0 log10, 98.952%). In addition, our formulation efficiently eradicated persistent adhered bacteria by >4.3 log10 (99.995%), which was also confirmed visually. Finally, the produced nanofibers showed good biocompatibility, proven by the cellular viability of mouse fibroblasts (L929). The data demonstrate that we have developed a new economic nanofiber formulation, which offers a triggered drug release, excellent antimicrobial properties, and good biocompatibility.
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Liu X, Liu S, Mai B, Su X, Guo X, Chang Y, Dong W, Wang W, Feng X. Synergistic gentamicin-photodynamic therapy against resistant bacteria in burn wound infections. Photodiagnosis Photodyn Ther 2022; 39:103034. [PMID: 35882288 DOI: 10.1016/j.pdpdt.2022.103034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Revised: 07/19/2022] [Accepted: 07/22/2022] [Indexed: 11/28/2022]
Abstract
BACKGROUND Multi-resistant bacteria, a result of the abuse of antibiotics, have greatly frustrated the effectiveness of antibiotics and produced a variety of side-effects. The combination of antibiotics with other therapies like antimicrobial photodynamic therapy (aPDT) may provide a useful strategy for fighting resistant bacteria. Here, the synergistic bactericidal effects of toluidine blue (TB)-aPDT and gentamicin (GEN) were evaluated in vitro and in vivo. METHODS The Post-antibacterial effects were measured at 600 nm (OD600) by a microplate reader. The bacterial envelope and biofilm were observed by a field emission scanning electron microscope. The expression of oxidative stress and Agr system-related genes was analyzed by qRT-PCR after GEN combined with TB-aPDT (GEN&aPDT). Besides, the burn infection model was established to investigate the cloning efficiency of immobilized bacteria, wound healing and inflammatory factors in the lesions. RESULTS GEN&aPDT could inhibit the growth of S. aureus and multidrug-resistant S. aureus (MDR S. aureus) for up to 15 h, and destroyed the cell envelope and biofilm structure of S. aureus and MDR S. aureus. During the process, ROS played an important role, inducing oxidative stress and downregulating the expression of AgrA, AgrB and PSM in the Agr system, resulting in decreased bacterial virulence and infectivity. In addition, GEN&aPDT cotreatment could effectively promoted wound healing in burn-infected mice by reducing the numbers of bacterial colonization in the wound, decreasing the content of inflammatory factors, and increasing the expression of growth factors. CONCLUSION The present study confirmed a bactericidal synergy between GEN and aPDT in vitro and in vivo, therein, the oxidative stress exhibited an important role in decreasing bacterial virulence and infectivity, which may bring new ideas for the treatment of bacterial resistance.
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Affiliation(s)
- Xin Liu
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Shupei Liu
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Bingjie Mai
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Xiaomin Su
- Shaanxi Blood Center, Xi'an 710061, Shaanxi, China
| | - Xiaoyu Guo
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Yawei Chang
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Wenzhuo Dong
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Weiqing Wang
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China
| | - Xiaolan Feng
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, Shaanxi, China.
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Gao Y, Qiu Z, Liu L, Li M, Xu B, Yu D, Qi D, Wu J. Multifunctional fibrous wound dressings for refractory wound healing. JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1002/pol.20220008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yujie Gao
- MOE Key Laboratory of Advanced Textile Materials & Manufacturing Technology Zhejiang Sci‐Tech University Hangzhou China
| | - Zhiye Qiu
- MOE Key Laboratory of Advanced Textile Materials & Manufacturing Technology Zhejiang Sci‐Tech University Hangzhou China
| | - Lei Liu
- MOE Key Laboratory of Advanced Textile Materials & Manufacturing Technology Zhejiang Sci‐Tech University Hangzhou China
| | - Mengmeng Li
- MOE Key Laboratory of Advanced Textile Materials & Manufacturing Technology Zhejiang Sci‐Tech University Hangzhou China
| | - Bingjie Xu
- MOE Key Laboratory of Advanced Textile Materials & Manufacturing Technology Zhejiang Sci‐Tech University Hangzhou China
| | - Dan Yu
- Department of Oral and Maxillofacial Surgery, the First Affiliated Hospital Zhejiang University School of Medicine Hangzhou China
| | - Dongming Qi
- MOE Key Laboratory of Advanced Textile Materials & Manufacturing Technology Zhejiang Sci‐Tech University Hangzhou China
- Zhejiang Provincial Engineering Research Center for Green and Low‐carbon Dyeing & Finishing Zhejiang Sci‐Tech University Hangzhou China
| | - Jindan Wu
- MOE Key Laboratory of Advanced Textile Materials & Manufacturing Technology Zhejiang Sci‐Tech University Hangzhou China
- Zhejiang Provincial Engineering Research Center for Green and Low‐carbon Dyeing & Finishing Zhejiang Sci‐Tech University Hangzhou China
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Costa SM, Fangueiro R, Ferreira DP. Drug Delivery Systems for Photodynamic Therapy: The Potentiality and Versatility of Electrospun Nanofibers. Macromol Biosci 2022; 22:e2100512. [PMID: 35247227 DOI: 10.1002/mabi.202100512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 02/02/2022] [Indexed: 11/07/2022]
Abstract
Recently, photodynamic therapy (PDT) has become a promising approach for the treatment of a broad range of diseases, including oncological and infectious diseases. This minimally invasive and localized therapy is based on the production of reactive oxygen species (ROS) able to destroy cancer cells and inactivate pathogens by combining the use of photosensitizers (PSs), light and molecular oxygen. To overcome the drawbacks of drug systemic administration, drug delivery systems (DDS) can be used to carrier the PSs, allowing higher therapeutic efficacy and minimal toxicological effects. Polymeric nanofibers produced by electrospinning emerged as powerful platforms for drug delivery applications. Electrospun nanofibers exhibit outstanding characteristics, such as large surface area to volume ratio associated with high drug loading, high porosity, flexibility, ability to incorporate and release a wide variety of therapeutic agents, biocompatibility and biodegradability. Due to the versatility of this technique, fibers with different morphologies and functionalities, including drug release profile can be produced. The possibility of scalability makes electrospinning even more attractive for the development of DDS. This review aims to explore and show an up to date of the huge potential of electrospun nanofibers as DDS for different PDT applications and discuss the opportunities and challenges in this field. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Sofia M Costa
- Centre for Textile Science and Technology (2C2T), University of Minho, Guimarães, 4800-058, Portugal
| | - Raul Fangueiro
- Centre for Textile Science and Technology (2C2T), University of Minho, Guimarães, 4800-058, Portugal.,Department of Mechanical Engineering, University of Minho, Guimarães, 4800-058, Portugal
| | - Diana P Ferreira
- Centre for Textile Science and Technology (2C2T), University of Minho, Guimarães, 4800-058, Portugal
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Versace DL, Breloy L, Palierse E, Coradin T. Contributions of photochemistry to bio-based antibacterial polymer materials. J Mater Chem B 2021; 9:9624-9641. [PMID: 34807217 DOI: 10.1039/d1tb01801a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Surgical site infections constitute a major health concern that may be addressed by conferring antibacterial properties to surgical tools and medical devices via functional coatings. Bio-sourced polymers are particularly well-suited to prepare such coatings as they are usually safe and can exhibit intrinsic antibacterial properties or serve as hosts for bactericidal agents. The goal of this Review is to highlight the unique contribution of photochemistry as a green and mild methodology for the development of such bio-based antibacterial materials. Photo-generation and photo-activation of bactericidal materials are illustrated. Recent efforts and current challenges to optimize the sustainability of the process, improve the safety of the materials and extend these strategies to 3D biomaterials are also emphasized.
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Affiliation(s)
- Davy-Louis Versace
- Institut de Chimie et des Matériaux Paris-Est (ICMPE, UMR-CNRS 7182), 2-8 rue Henri Dunant, 94320 Thiais, France.
| | - Louise Breloy
- Institut de Chimie et des Matériaux Paris-Est (ICMPE, UMR-CNRS 7182), 2-8 rue Henri Dunant, 94320 Thiais, France.
| | - Estelle Palierse
- Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), UMR 7574, 4 place Jussieu, 75005 Paris, France. .,Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface (LRS), UMR 7197, 4 place Jussieu, 75005 Paris, France
| | - Thibaud Coradin
- Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), UMR 7574, 4 place Jussieu, 75005 Paris, France.
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Abdel Khalek MA, Abdel Gaber SA, El-Domany RA, El-Kemary MA. Photoactive electrospun cellulose acetate/polyethylene oxide/methylene blue and trilayered cellulose acetate/polyethylene oxide/silk fibroin/ciprofloxacin nanofibers for chronic wound healing. Int J Biol Macromol 2021; 193:1752-1766. [PMID: 34774864 DOI: 10.1016/j.ijbiomac.2021.11.012] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 10/25/2021] [Accepted: 11/01/2021] [Indexed: 12/17/2022]
Abstract
This study aimed to synthesize cellulose acetate (CA)-based electrospun nanofibers as drug delivery dressings for chronic wound healing. For the first time, CA was blended with polyethylene oxide (PEO) using acetone and formic acid. Methylene blue (MB) was incorporated into monolayered random CA/PEO nanofibers. They had a diameter of 400-600 nm, were hydrophilic, and generated reactive oxygen species upon irradiation. Thus, they mediated antimicrobial photodynamic inactivation (aPDI) against isolated biofilm-forming Staphylococcus aureus, Klebsiella pneumoniae, and Pseudomonas aeruginosa. Bacterial survival, biofilm mass, and produced pyocyanin of the treated groups declined by 90%, 80%, and 3 folds, respectively. On the other hand, ciprofloxacin (Cipro) was loaded into an innovative trilayered aligned nanofiber consisting of CA/PEO surrounding a blank layer of silk fibroin. Cipro and MB release followed the Korsmeyer-Peppas model. An infected diabetic wound mouse model was established and treated with either MB-aPDI or Cipro. A combined therapy group of MB-aPDI followed by Cipro was included. The combined therapy showed significantly better results than monotherapies delineated by elevation in re-epithelization, collagen deposition, CD34, and TGF-β expression, along with a decline in CD95+ cells. This study deduced that drug-loaded CA electrospun nanofibers might be exploited in multimodal chronic wound healing.
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Affiliation(s)
- Mohamed A Abdel Khalek
- Institute of Nanoscience and Nanotechnology, Kafrelsheikh University, Kafrelsheikh 33516, Egypt
| | - Sara A Abdel Gaber
- Nanomedicine Department, Institute of Nanoscience and Nanotechnology, Kafrelsheikh University, Kafrelsheikh 33516, Egypt.
| | - Ramadan A El-Domany
- Department of Microbiology and Immunology, Faculty of Pharmacy, Kafrelsheikh University, Kafrelsheikh 33516, Egypt
| | - Maged A El-Kemary
- Institute of Nanoscience and Nanotechnology, Kafrelsheikh University, Kafrelsheikh 33516, Egypt.
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An Insight into the Role of Non-Porphyrinoid Photosensitizers for Skin Wound Healing. Int J Mol Sci 2020; 22:ijms22010234. [PMID: 33379392 PMCID: PMC7795024 DOI: 10.3390/ijms22010234] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 12/22/2020] [Accepted: 12/23/2020] [Indexed: 12/22/2022] Open
Abstract
The concept behind photodynamic therapy (PDT) is being successfully applied in different biomedical contexts such as cancer diseases, inactivation of microorganisms and, more recently, to improve wound healing and tissue regeneration. The effectiveness of PDT in skin treatments is associated with the role of reactive oxygen species (ROS) produced by a photosensitizer (PS), which acts as a "double agent". The release of ROS must be high enough to prevent microbial growth and, simultaneously, to accelerate the immune system response by recruiting important regenerative agents to the wound site. The growing interest in this subject is reflected by the increasing number of studies concerning the optimization of relevant experimental parameters for wound healing via PDT, namely, light features, the structure and concentration of the PS, and the wound type and location. Considering the importance of developing PSs with suitable features for this emergent topic concerning skin wound healing, in this review, a special focus on the achievements attained for each PS class, namely, of the non-porphyrinoid type, is given.
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Qiu H, Zhu S, Pang L, Ma J, Liu Y, Du L, Wu Y, Jin Y. ICG-loaded photodynamic chitosan/polyvinyl alcohol composite nanofibers: Anti-resistant bacterial effect and improved healing of infected wounds. Int J Pharm 2020; 588:119797. [DOI: 10.1016/j.ijpharm.2020.119797] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 07/28/2020] [Accepted: 08/18/2020] [Indexed: 01/09/2023]
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14
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Biocompatible indocyanine green loaded PLA nanofibers for in situ antimicrobial photodynamic therapy. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 115:111068. [DOI: 10.1016/j.msec.2020.111068] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 04/18/2020] [Accepted: 05/07/2020] [Indexed: 12/25/2022]
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15
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Zhao ZJ, Xu ZP, Ma YY, Ma JD, Hong G. Photodynamic antimicrobial chemotherapy in mice with Pseudomonas aeruginosa-infected wounds. PLoS One 2020; 15:e0237851. [PMID: 32877414 PMCID: PMC7467278 DOI: 10.1371/journal.pone.0237851] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Accepted: 08/04/2020] [Indexed: 12/03/2022] Open
Abstract
This study examined the antibacterial effect of protoporphyrin IX–ethylenediamine derivative (PPIX-ED)–mediated photodynamic antimicrobial chemotherapy (PPIX-ED-PACT) against Pseudomonas aeruginosa in vitro and in vivo. PPIX-ED potently inhibited the growth of Pseudomonas aeruginosa by inducing reactive oxygen species production via photoactivation. Atomic force microscopy revealed that PPIX-ED-PACT induced the leakage of bacterial content by degrading the bacterial membrane and wall. As revealed using acridine orange/ethidium bromide staining, PPIX-ED-PACT altered the permeability of the bacterial membrane. In addition, the antibacterial effect of PPIX-ED-PACT was demonstrated in an in vivo model of P. aeruginosa-infected wounds. PPIX-ED (100 μM) decreased the number of P. aeruginosa colony-forming units by 4.2 log10. Moreover, histological analysis illustrated that the wound healing rate was 98% on day 14 after treatment, which was 10% higher than that in the control group. According to the present findings, PPIX-ED-PACT can effectively inhibit the growth of P. aeruginosa in vitro and in vivo.
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Affiliation(s)
- Zhan-Juan Zhao
- School of Basic Medical Science, Hebei University, Baoding, China
| | - Zeng-Ping Xu
- Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin Key Laboratory of Biomedical Material, Tianjin, China
| | - Ying-Ying Ma
- Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin Key Laboratory of Biomedical Material, Tianjin, China
| | - Jin-Duo Ma
- School of Basic Medical Science, Hebei University, Baoding, China
| | - Ge Hong
- Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin Key Laboratory of Biomedical Material, Tianjin, China
- * E-mail:
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16
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Antibacterial photodynamic activity of photosensitizer-embedded alginate-pectin-carboxymethyl cellulose composite biopolymer films. Lasers Med Sci 2020; 36:763-772. [PMID: 32767164 DOI: 10.1007/s10103-020-03083-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 06/17/2020] [Indexed: 10/23/2022]
Abstract
Antimicrobial photodynamic therapy (APDT) is a promising approach for treatment of wounds infected with antibiotic-resistant bacteria. In this approach, delivery of appropriate concentration of photosensitizer (PS) at the infected site is a critical step; it is therefore essential that PS need to be administered at the infected site in a suitable formulation. Here, we report preparation of PS-embedded composite biopolymer films and their photobactericidal properties against methicillin-resistant Staphylococcus aureus (MRSA) and biocompatibility. Sodium alginate (SA), pectin (PC), and carboxymethyl cellulose (CMC) were used for preparing films containing chlorin p6 (Cp6, anionic PS) or methylene blue (MB, cationic PS). Films containing 1% CMC (15 mm diameter; 110 ± 09 μm thickness) showed ~ 55% light transmission in 500 to 750 nm region and high swelling rate as indicated by ~ 38% increase in diameter within 1 h. Absorption spectroscopic studies of PS-embedded films revealed that while Cp6 existed mainly in monomeric state, MB existed in both dimeric and monomeric forms. MRSA incubated with the film for 1 h displayed substantial uptake of Cp6 and MB as indicated by the presence of Cp6 fluorescence and MB staining in cells under the microscope. Furthermore, photodynamic treatment (660 nm, 10 J/cm2) of MRSA with Cp6 embedded in film or free Cp6 resulted in ~ 3 log reduction in colony-forming units (cfu), whereas decrease in cfu was less (~ 1 log) for MB-embedded film than for free MB (~ 6 logs). Studies on human keratinocyte (HaCaT) cells showed that there was no significant change in the viability of cells when they were incubated with solubilized films (plain) for 24 h or subjected to treatment with PS-containing films followed by PDT. These results suggest that films are biocompatible and have potential application in photodynamic treatment of MRSA-infected wounds.
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17
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Vancomycin-functionalized Eudragit-based nanofibers: Tunable drug release and wound healing efficacy. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101812] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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18
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Dharmaratne P, Sapugahawatte DN, Wang B, Chan CL, Lau KM, Lau CB, Fung KP, Ng DK, Ip M. Contemporary approaches and future perspectives of antibacterial photodynamic therapy (aPDT) against methicillin-resistant Staphylococcus aureus (MRSA): A systematic review. Eur J Med Chem 2020; 200:112341. [PMID: 32505848 DOI: 10.1016/j.ejmech.2020.112341] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 04/15/2020] [Accepted: 04/15/2020] [Indexed: 11/19/2022]
Abstract
The high prevalence of methicillin-resistant Staphylococcus aureus (MRSA) causing skin and soft tissue infections in both the community and healthcare settings challenges the limited options of effective antibiotics and motivates the search for alternative therapeutic solutions, such as antibacterial photodynamic therapy (aPDT). While many publications have described the promising anti-bacterial activities of PDT in vitro, its applications in vivo and in the clinic have been very limited. This limited availability may in part be due to variabilities in the selected photosensitizing agents (PS), the variable testing conditions used to examine anti-bacterial activities and their effectiveness in treating MRSA infections. We thus sought to systematically review and examine the evidence from existing studies on aPDT associated with MRSA and to critically appraise its current state of development and areas to be addressed in future studies. In 2018, we developed and registered a review protocol in the International Prospective Register of Systematic Reviews (PROSPERO) with registration No: CRD42018086736. Three bibliographical databases were consulted (PUBMED, MEDLINE, and EMBASE), and a total of 113 studies were included in this systematic review based on our eligibility criteria. Many variables, such as the use of a wide range of solvents, pre-irradiation times, irradiation times, light sources and light doses, have been used in the methods reported by researchers, which significantly affect the inter-study comparability and results. On another note, new approaches of linking immunoglobulin G (IgG), antibodies, efflux pump inhibitors, and bacteriophages with photosensitizers (PSs) and the incorporation of PSs into nano-scale delivery systems exert a direct effect on improving aPDT. Enhanced activities have also been achieved by optimizing the physicochemical properties of the PSs, such as the introduction of highly lipophilic, poly-cationic and site-specific modifications of the compounds. However, few in vivo studies (n = 17) have been conducted to translate aPDT into preclinical studies. We anticipate that further standardization of the experimental conditions and assessing the efficacy in vivo would allow this technology to be further applied in preclinical trials, so that aPDT would develop to become a sustainable, alternative therapeutic option against MRSA infection in the future.
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Affiliation(s)
- Priyanga Dharmaratne
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong (SAR), China.
| | | | - Baiyan Wang
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong (SAR), China.
| | - Chung Lap Chan
- Institute of Chinese Medicine and State Key Laboratory of Research on Bioactivities and Clinical Applications of Medicinal Plants, The Chinese University of Hong Kong, China.
| | - Kit-Man Lau
- Institute of Chinese Medicine and State Key Laboratory of Research on Bioactivities and Clinical Applications of Medicinal Plants, The Chinese University of Hong Kong, China.
| | - Clara Bs Lau
- Institute of Chinese Medicine and State Key Laboratory of Research on Bioactivities and Clinical Applications of Medicinal Plants, The Chinese University of Hong Kong, China.
| | - Kwok Pui Fung
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong (SAR), China; CUHK-Zhejiang University Joint Laboratory on Natural Products and Toxicology Research, China.
| | - Dennis Kp Ng
- Department of Chemistry, Faculty of Science, The Chinese University of Hong Kong, Hong Kong (SAR), China
| | - Margaret Ip
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong (SAR), China; Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China.
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19
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Zhong Q, Long H, Hu W, Shi L, Zan F, Xiao M, Tan S, Ke Y, Wu G, Chen H. Dual-Function Antibacterial Micelle via Self-Assembling Block Copolymers with Various Antibacterial Nanoparticles. ACS OMEGA 2020; 5:8523-8533. [PMID: 32337413 PMCID: PMC7178363 DOI: 10.1021/acsomega.9b04086] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 04/01/2020] [Indexed: 06/02/2023]
Abstract
Antibacterial biomaterials with kill-resist dual functions by combining multiple active components have been constructed, with a final aim at decreasing the incidence of biomaterial-centered infection. Self-assemblies of bactericidal ZnO or Ag-ZnO nanoparticles (NPs) with triblock copolymers, poly(ethylene glycol)-b-poly(3-hydroxybutyrate-co-3-hydroxyvalerate)-poly(ethylene glycol) (PEG-PHBV-PEG), showed a hydrophobic PHBV layer on NPs with PEG segments exposed outside via hydrogen bonding, resulting in long PEG (M w = 2000) aggregation and short PEG (M w = 1000) aggregation, respectively. These nanocomposite aggregations released ZnO or Ag-ZnO rapidly within initial few hours, and about 42-45% of NPs were left in the nanocomposites in deionized water for 16 d to improve the long-term antibacterial activity further. At the concentration below 50 μg/mL, the nanocomposite aggregation was cell-compatible with ATDC5 and showed sterilization rates over 91% against Escherichia coli and 98% against Staphylococcus aureus. Long PEG aggregation showed greater cell proliferation capacity than short PEG aggregation, as well as better bacterial resistance and bactericidal activity against both E. coli and S. aureus. The flexible self-assembling antibacterial NPs with antifouling block copolymers via adjusting the component ratio or the segment length have shown premise in the construction of the dual-function antibacterial materials.
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Affiliation(s)
- Qing Zhong
- Guangdong Engineering
& Technology Research Centre of Graphene-Like Materials and Products,
College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, China
| | - Hui Long
- Guangdong Engineering
& Technology Research Centre of Graphene-Like Materials and Products,
College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, China
| | - Wei Hu
- Guangdong Engineering
& Technology Research Centre of Graphene-Like Materials and Products,
College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, China
| | - Liujun Shi
- Guangdong Engineering
& Technology Research Centre of Graphene-Like Materials and Products,
College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, China
| | - Fei Zan
- Department of Biomedical Engineering, South
China University of Technology, Guangzhou 510641, China
| | - Meng Xiao
- Guangdong Engineering
& Technology Research Centre of Graphene-Like Materials and Products,
College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, China
| | - Shaozao Tan
- Guangdong Engineering
& Technology Research Centre of Graphene-Like Materials and Products,
College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, China
| | - Yu Ke
- Department
of Biomedical Engineering, Key Laboratory of Biomaterials of Guangdong
Higher Education Institutes, College of Life Science and Technology, Jinan University, Guangzhou 510632, China
| | - Gang Wu
- Department of Biomedical Engineering, South
China University of Technology, Guangzhou 510641, China
| | - Huifang Chen
- College of Pharmacy, Guangdong
Lingnan Institute of Technology, Guangzhou 510663, China
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20
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Oyama J, Fernandes Herculano Ramos-Milaré ÁC, Lopes Lera-Nonose DSS, Nesi-Reis V, Galhardo Demarchi I, Alessi Aristides SM, Juarez Vieira Teixeira J, Gomes Verzignassi Silveira T, Campana Lonardoni MV. Photodynamic therapy in wound healing in vivo: a systematic review. Photodiagnosis Photodyn Ther 2020; 30:101682. [PMID: 32032780 DOI: 10.1016/j.pdpdt.2020.101682] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 01/20/2020] [Accepted: 01/31/2020] [Indexed: 12/17/2022]
Abstract
Wounds constitute severe problems in public health. Inappropriate manipulation to promote wound healing and indiscriminate use of antibiotics may contribute to failure in wound treatment, leading to bacterial growth and resistance. Appropriate and correct approaches to wound treatment are crucially important. Further, the development of new and effective treatment modalities is important to decrease infection-related mortality and to reduce patient suffering and side effects. Photodynamic therapy (PDT) could be a promising approach to ameliorate this global health problem. We researched articles that used PDT in wound healing in vivo. The systematic review included articles that investigated the effect of PDT on wound healing in animals, published from May 2008 through 2018, in the databases PubMed and Web of Science. The main types of wounds described in the selected articles were burns, abrasions, and excisional wounds. Most of the studies tested PDT in wounds infected by methicillin-resistant Staphylococcus aureus, S. aureus standard strain, or Pseudomonas aeruginosa. The studies demonstrated that PDT contributes in several ways to the wound healing process, such as killing bacterial cells and stimulating the proliferation of fibroblasts and consequently of collagen and elastin. Based on these studies, PDT provided excellent results for the wound healing process, acting in several steps and accelerating tissue repair. PDT has proven to be a promising therapeutic modality, able to inhibit bacterial regrowth or kill bacteria, contributing significantly to accelerate the wound healing process.
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Affiliation(s)
- Jully Oyama
- Graduate Program in Bioscience and Physiopathology, State University of Maringá, Colombo Avenue, 5790, Postal Code 87020-900, Maringá, Paraná, Brazil.
| | | | | | - Vanessa Nesi-Reis
- Graduate Program in Health Sciences, State University of Maringá, Colombo Avenue, 5790, Postal Code 87020-900, Maringá, Paraná, Brazil
| | - Izabel Galhardo Demarchi
- Graduate Program in Health Sciences, State University of Maringá, Colombo Avenue, 5790, Postal Code 87020-900, Maringá, Paraná, Brazil; Department of Clinical Analysis, Federal University of Santa Catarina, Roberto Sampaio Gonzaga Street, Campus Reitor João David Ferreira Lima, Postal Code 88040-970, Florianópolis, Santa Catarina, Brazil
| | - Sandra Mara Alessi Aristides
- Department of Clinical Analysis and Biomedicine, State University of Maringá, Colombo Avenue, 5790, Postal Code 87020-900, Maringá, Paraná, Brazil
| | - Jorge Juarez Vieira Teixeira
- Department of Clinical Analysis and Biomedicine, State University of Maringá, Colombo Avenue, 5790, Postal Code 87020-900, Maringá, Paraná, Brazil
| | - Thaís Gomes Verzignassi Silveira
- Department of Clinical Analysis and Biomedicine, State University of Maringá, Colombo Avenue, 5790, Postal Code 87020-900, Maringá, Paraná, Brazil
| | - Maria Valdrinez Campana Lonardoni
- Department of Clinical Analysis and Biomedicine, State University of Maringá, Colombo Avenue, 5790, Postal Code 87020-900, Maringá, Paraná, Brazil
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21
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Photodynamic therapy as an alternative to antibiotic therapy for the treatment of infected leg ulcers. Photodiagnosis Photodyn Ther 2018; 23:132-143. [DOI: 10.1016/j.pdpdt.2018.05.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 03/25/2018] [Accepted: 05/02/2018] [Indexed: 12/29/2022]
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22
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Jiang S, Ma BC, Huang W, Kaltbeitzel A, Kizisavas G, Crespy D, Zhang KAI, Landfester K. Visible light active nanofibrous membrane for antibacterial wound dressing. NANOSCALE HORIZONS 2018; 3:439-446. [PMID: 32254131 DOI: 10.1039/c8nh00021b] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Chronic wound infections, especially due to the emergence of multidrug resistance in bacteria, require the urgent development of alternative antibacterial therapies. Here, we developed a new class of hydrogel nanofibrous membranes that show visible light-induced disinfection. The presented photocatalytic disinfection is based on the generation of reactive singlet oxygen from a conjugated microporous polymer upon visible light irradiation. Therefore, sustained protection of the wound area can be provided in the presence of visible light. Fabrication of the photoactive wound dressing consists of first synthesizing photoactive conjugated microporous polymer nanoparticles by miniemulsion polymerization and subsequently embedding the nanoparticles in polyvinyl alcohol hydrogel nanofibers by colloid-electrospinning. The fibers were then crosslinked in glutaraldehyde/HCl vapor to be water-insoluble. This nanoparticle-in-nanofiber structure allows for a flexible combination of the properties of the nanoparticles and supporting nanofibers. The disinfecting properties of the membranes were evaluated with the inactivation of Escherichia coli K-12 and Bacillus subtilis as model systems of Gram-negative and Gram-positive bacteria, as well as the inhibition of biofilm growth under irradiation of visible light. Cytotoxicity tests on fibroblast cells revealed a high cytocompatibility of the membranes. Furthermore, the good mechanical properties of the membranes allow for their facile removal after use and prevent the leakage of the embedded nanoparticles into the wound, making the photoactive hydrogel membranes a promising candidate for active wound dressing materials.
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Affiliation(s)
- Shuai Jiang
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany.
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23
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Fu Y, Li X, Ren Z, Mao C, Han G. Multifunctional Electrospun Nanofibers for Enhancing Localized Cancer Treatment. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1801183. [PMID: 29952070 PMCID: PMC6342678 DOI: 10.1002/smll.201801183] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 04/26/2018] [Indexed: 05/16/2023]
Abstract
Localized cancer treatment is one of the most effective strategies in clinical destruction of solid tumors at early stages as it can minimize the side effects of cancer therapeutics. Electrospun nanofibers have been demonstrated as a promising implantable platform in localized cancer treatment, enabling the on-site delivery of therapeutic components and minimizing side effects to normal tissues. This Review discusses the recent cutting-edge research with regard to electrospun nanofibers used for various therapeutic approaches, including gene therapy, chemotherapy, photodynamic therapy, thermal therapy, and combination therapy, in enhancing localized cancer treatment. Furthermore, it extensively analyzes the current challenges and potential breakthroughs in utilizing this novel platform for clinical transition in localized cancer treatment.
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Affiliation(s)
- Yike Fu
- State Key Laboratory of Silicon Materials, School of Materials
Science and Engineering, Zhejiang University, Hangzhou, 310027, P.R.
China
| | - Xiang Li
- State Key Laboratory of Silicon Materials, School of Materials
Science and Engineering, Zhejiang University, Hangzhou, 310027, P.R. China.,
| | - Zhaohui Ren
- State Key Laboratory of Silicon Materials, School of Materials
Science and Engineering, Zhejiang University, Hangzhou, 310027, P.R. China.,
| | - Chuanbin Mao
- Department of Chemistry & Biochemistry, Stephenson Life
Sciences Research Center, University of Oklahoma, 101 Stephenson Parkway,
Norman, Oklahoma, 73019-5300, USA.,
| | - Gaorong Han
- State Key Laboratory of Silicon Materials, School of Materials
Science and Engineering, Zhejiang University, Hangzhou, 310027, P.R.
China
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24
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Gizaw M, Thompson J, Faglie A, Lee SY, Neuenschwander P, Chou SF. Electrospun Fibers as a Dressing Material for Drug and Biological Agent Delivery in Wound Healing Applications. Bioengineering (Basel) 2018; 5:E9. [PMID: 29382065 PMCID: PMC5874875 DOI: 10.3390/bioengineering5010009] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 01/17/2018] [Accepted: 01/22/2018] [Indexed: 12/16/2022] Open
Abstract
Wound healing is a complex tissue regeneration process that promotes the growth of new tissue to provide the body with the necessary barrier from the outside environment. In the class of non-healing wounds, diabetic wounds, and ulcers, dressing materials that are available clinically (e.g., gels and creams) have demonstrated only a slow improvement with current available technologies. Among all available current technologies, electrospun fibers exhibit several characteristics that may provide novel replacement dressing materials for the above-mentioned wounds. Therefore, in this review, we focus on recent achievements in electrospun drug-eluting fibers for wound healing applications. In particular, we review drug release, including small molecule drugs, proteins and peptides, and gene vectors from electrospun fibers with respect to wound healing. Furthermore, we provide an overview on multifunctional dressing materials based on electrospun fibers, including those that are capable of achieving wound debridement and wound healing simultaneously as well as multi-drugs loading/types suitable for various stages of the healing process. Our review provides important and sufficient information to inform the field in development of fiber-based dressing materials for clinical treatment of non-healing wounds.
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Affiliation(s)
- Mulugeta Gizaw
- Department of Mechanical Engineering, College of Engineering, The University of Texas at Tyler, Tyler, TX 75799, USA.
| | - Jeffrey Thompson
- Department of Mechanical Engineering, College of Engineering, The University of Texas at Tyler, Tyler, TX 75799, USA.
| | - Addison Faglie
- Department of Mechanical Engineering, College of Engineering, The University of Texas at Tyler, Tyler, TX 75799, USA.
| | - Shih-Yu Lee
- School of Nursing, College of Nursing and Health Sciences, The University of Texas at Tyler, Tyler, TX 75799, USA.
| | - Pierre Neuenschwander
- Department of Cellular and Molecular Biology, The University of Texas Health Science Center at Tyler, Tyler, TX 75708, USA.
| | - Shih-Feng Chou
- Department of Mechanical Engineering, College of Engineering, The University of Texas at Tyler, Tyler, TX 75799, USA.
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25
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Electrospun Antimicrobial Wound Dressings: Novel Strategies to Fight Against Wound Infections. CHRONIC WOUNDS, WOUND DRESSINGS AND WOUND HEALING 2018. [DOI: 10.1007/15695_2018_133] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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