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Haririan Y, Asefnejad A. Biopolymer hydrogels and synergistic blends for tailored wound healing. Int J Biol Macromol 2024:135519. [PMID: 39260639 DOI: 10.1016/j.ijbiomac.2024.135519] [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: 06/04/2024] [Revised: 09/03/2024] [Accepted: 09/08/2024] [Indexed: 09/13/2024]
Abstract
Biopolymers have a transformative role in wound repair due to their biocompatibility, ability to stimulate collagen production, and controlled drug and growth factor delivery. This article delves into the biological parameters critical to wound healing emphasizing how combinations of hydrogels with reparative properties can be strategically designed to create matrices that stimulate targeted cellular responses at the wound site to facilitate tissue repair and recovery. Beyond a detailed examination of various biopolymer types and their functionalities in wound dressings acknowledging that the optimal choice depends on the specific wound type and application, this evaluation provides concepts for developing synergistic biopolymer blends to create next-generation dressings with enhanced efficiencies. Furthermore, the incorporation of therapeutic agents such as medications and wound healing accelerators into dressings to enhance their efficacy is examined. These agents often possess desirable properties such as antibacterial activity, antioxidant effects, and the ability to promote collagen synthesis and tissue regeneration. Finally, recent advancements in conductive hydrogels are explored, highlighting their capabilities in treatment and real-time wound monitoring. This comprehensive resource emphasizes the importance of optimizing ingredient efficiency besides assisting researchers in selecting suitable materials for personalized wound dressings, ultimately leading to more sophisticated and effective wound management strategies.
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Affiliation(s)
- Yasamin Haririan
- Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
| | - Azadeh Asefnejad
- Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
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2
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Ghatak S, Hemann C, Boslett J, Singh K, Sharma A, El Masry MS, Abouhashem AS, Ghosh N, Mathew-Steiner SS, Roy S, Zweier JL, Sen CK. Bacterial Pyocyanin Inducible Keratin 6A Accelerates Closure of Epithelial Defect under Conditions of Mitochondrial Dysfunction. J Invest Dermatol 2023; 143:2052-2064.e5. [PMID: 37044260 PMCID: PMC10529774 DOI: 10.1016/j.jid.2023.03.1671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 03/13/2023] [Accepted: 03/19/2023] [Indexed: 04/14/2023]
Abstract
Repair of epithelial defect is complicated by infection and related metabolites. Pyocyanin (PYO) is one such metabolite that is secreted during Pseudomonas aeruginosa infection. Keratinocyte (KC) migration is required for the closure of skin epithelial defects. This work sought to understand PYO-KC interaction and its significance in tissue repair. Stable Isotope Labeling by Amino acids in Cell culture proteomics identified mitochondrial dysfunction as the top pathway responsive to PYO exposure in human KCs. Consistently, functional studies showed mitochondrial stress, depletion of reducing equivalents, and adenosine triphosphate. Strikingly, despite all stated earlier, PYO markedly accelerated KC migration. Investigation of underlying mechanisms revealed, to our knowledge, a previously unreported function of keratin 6A in KCs. Keratin 6A was PYO inducible and accelerated closure of epithelial defect. Acceleration of closure was associated with poor quality healing, including compromised expression of apical junction proteins. This work recognizes keratin 6A for its role in enhancing KC migration under conditions of threat posed by PYO. Qualitatively deficient junctional proteins under conditions of defensive acceleration of KC migration explain why an infected wound close with deficient skin barrier function as previously reported.
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Affiliation(s)
- Subhadip Ghatak
- Indiana Center for Regenerative Medicine and Engineering, Department of Surgery, School of Medicine, Indiana University, Indianapolis, Indiana, USA
| | - Craig Hemann
- Division of Cardiovascular Medicine, Department of Internal Medicine, Dorothy M. Davis Heart and Lung Research Institute, College of Medicine, The Ohio State University, Columbus, Ohio, USA
| | - James Boslett
- Division of Cardiovascular Medicine, Department of Internal Medicine, Dorothy M. Davis Heart and Lung Research Institute, College of Medicine, The Ohio State University, Columbus, Ohio, USA; Department of Cell Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Kanhaiya Singh
- Indiana Center for Regenerative Medicine and Engineering, Department of Surgery, School of Medicine, Indiana University, Indianapolis, Indiana, USA
| | - Anu Sharma
- Indiana Center for Regenerative Medicine and Engineering, Department of Surgery, School of Medicine, Indiana University, Indianapolis, Indiana, USA
| | - Mohamed S El Masry
- Indiana Center for Regenerative Medicine and Engineering, Department of Surgery, School of Medicine, Indiana University, Indianapolis, Indiana, USA
| | - Ahmed Safwat Abouhashem
- Indiana Center for Regenerative Medicine and Engineering, Department of Surgery, School of Medicine, Indiana University, Indianapolis, Indiana, USA
| | - Nandini Ghosh
- Indiana Center for Regenerative Medicine and Engineering, Department of Surgery, School of Medicine, Indiana University, Indianapolis, Indiana, USA
| | - Shomita S Mathew-Steiner
- Indiana Center for Regenerative Medicine and Engineering, Department of Surgery, School of Medicine, Indiana University, Indianapolis, Indiana, USA
| | - Sashwati Roy
- Indiana Center for Regenerative Medicine and Engineering, Department of Surgery, School of Medicine, Indiana University, Indianapolis, Indiana, USA
| | - Jay L Zweier
- Division of Cardiovascular Medicine, Department of Internal Medicine, Dorothy M. Davis Heart and Lung Research Institute, College of Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Chandan K Sen
- Indiana Center for Regenerative Medicine and Engineering, Department of Surgery, School of Medicine, Indiana University, Indianapolis, Indiana, USA.
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3
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Tran HQ, Shahriar SS, Yan Z, Xie J. Recent Advances in Functional Wound Dressings. Adv Wound Care (New Rochelle) 2023; 12:399-427. [PMID: 36301918 PMCID: PMC10125407 DOI: 10.1089/wound.2022.0059] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 09/24/2022] [Indexed: 12/15/2022] Open
Abstract
Significance: Nowadays, the wound dressing is no longer limited to its primary wound protection ability. Hydrogel, sponge-like material, three dimensional-printed mesh, and nanofiber-based dressings with incorporation of functional components, such as nanomaterials, growth factors, enzymes, antimicrobial agents, and electronics, are able to not only prevent/treat infection but also accelerate the wound healing and monitor the wound-healing status. Recent Advances: The advances in nanotechnologies and materials science have paved the way to incorporate various functional components into the dressings, which can facilitate wound healing and monitor different biological parameters in the wound area. In this review, we mainly focus on the discussion of recently developed functional wound dressings. Critical Issues: Understanding the structure and composition of wound dressings is important to correlate their functions with the outcome of wound management. Future Directions: "All-in-one" dressings that integrate multiple functions (e.g., monitoring, antimicrobial, pain relief, immune modulation, and regeneration) could be effective for wound repair and regeneration.
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Affiliation(s)
- Huy Quang Tran
- Department of Surgery-Transplant and Mary & Dick Holland Regenerative Medicine Program, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - S.M. Shatil Shahriar
- Department of Surgery-Transplant and Mary & Dick Holland Regenerative Medicine Program, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska, USA
- Eppley Institute for Research in Cancer and Allied Diseases, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Zheng Yan
- Department of Mechanical & Aerospace Engineering, Biological & Chemical Engineering, University of Missouri, Columbia, Missouri, USA
- Department of Biomedical, Biological & Chemical Engineering, University of Missouri, Columbia, Missouri, USA
| | - Jingwei Xie
- Department of Surgery-Transplant and Mary & Dick Holland Regenerative Medicine Program, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska, USA
- Department of Mechanical and Materials Engineering, College of Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
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Evans JP, Sen CK. Electrochemical Devices in Cutaneous Wound Healing. Bioengineering (Basel) 2023; 10:711. [PMID: 37370642 PMCID: PMC10295280 DOI: 10.3390/bioengineering10060711] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 05/30/2023] [Accepted: 06/01/2023] [Indexed: 06/29/2023] Open
Abstract
In healthy skin, vectorial ion transport gives rise to a transepithelial potential which directly impacts many physiological aspects of skin function. A wound is a physical defect that breaches the epithelial barrier and changes the electrochemical environment of skin. Electroceutical dressings are devices that manipulate the electrochemical environment, host as well as microbial, of a wound. In this review, electroceuticals are organized into three mechanistic classes: ionic, wireless, and battery powered. All three classes of electroceutical dressing show encouraging effects on infection management and wound healing with evidence of favorable impact on keratinocyte migration and disruption of wound biofilm infection. This foundation sets the stage for further mechanistic as well as interventional studies. Successful conduct of such studies will determine the best dosage, timing, and class of stimulus necessary to maximize therapeutic efficacy.
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Affiliation(s)
| | - Chandan K. Sen
- Indiana Center for Regenerative Medicine & Engineering, Indiana University Health Comprehensive Wound Center, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
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Chen Y, Xu W, Zheng X, Huang X, Dan N, Wang M, Li Y, Li Z, Dan W, Wang Y. Two-Layered Biomimetic Flexible Self-Powered Electrical Stimulator for Promoting Wound Healing. Biomacromolecules 2023; 24:1483-1496. [PMID: 36802497 DOI: 10.1021/acs.biomac.2c01520] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
The repair of wound damage has been a common problem in clinic for a long time. Inspired by the electroactive nature of tissues and the electrical stimulation of wounds in clinical practice, the next generation of wound therapy with self-powered electrical stimulator is expected to achieve the desired therapeutic effect. In this work, a two-layered self-powered electrical-stimulator-based wound dressing (SEWD) was designed through the on-demand integration of the bionic tree-like piezoelectric nanofiber and the adhesive hydrogel with biomimetic electrical activity. SEWD has good mechanical properties, adhesion properties, self-powered properties, high sensitivity, and biocompatibility. The interface between the two layers was well integrated and relatively independent. Herein, the piezoelectric nanofibers were prepared by P(VDF-TrFE) electrospinning, and the morphology of the nanofibers was controlled by adjusting the electrical conductivity of the electrospinning solution. Benefiting from its bionic dendritic structure, the prepared piezoelectric nanofibers had better mechanical properties and piezoelectric sensitivity than native P(VDF-TrFE) nanofibers, which can convert tiny forces into electrical signals as a power source for tissue repair. At the same time, the designed conductive adhesive hydrogel was inspired by the adhesive properties of natural mussels and the redox electron pairs formed by catechol and metal ions. It has bionic electrical activity matching with the tissue and can conduct the electrical signal generated by the piezoelectric effect to the wound site so as to facilitate the electrical stimulation treatment of tissue repair. In addition, in vitro and in vivo experiments demonstrated that SEWD converts mechanical energy into electricity to stimulate cell proliferation and wound healing. The proposed healing strategy for the effective treatment of skin injury was provided by developing self-powered wound dressing, which is of great significance to the rapid, safe, and effective promotion of wound healing.
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Affiliation(s)
- Yining Chen
- Key Laboratory of Leather Chemistry and Engineering (Ministry of Education), Sichuan University, Chengdu 610065, China
- Research Center of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Wenxin Xu
- Key Laboratory of Leather Chemistry and Engineering (Ministry of Education), Sichuan University, Chengdu 610065, China
- Research Center of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Xin Zheng
- Key Laboratory of Leather Chemistry and Engineering (Ministry of Education), Sichuan University, Chengdu 610065, China
- Research Center of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Xuantao Huang
- Key Laboratory of Leather Chemistry and Engineering (Ministry of Education), Sichuan University, Chengdu 610065, China
- Research Center of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Nianhua Dan
- Key Laboratory of Leather Chemistry and Engineering (Ministry of Education), Sichuan University, Chengdu 610065, China
- Research Center of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Meng Wang
- Department of Orthopaedics, Strategic Support Force Medical Center, Beijing 100101, P. R. China
| | - Yuwen Li
- Department of Pharmacy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Zhengjun Li
- Key Laboratory of Leather Chemistry and Engineering (Ministry of Education), Sichuan University, Chengdu 610065, China
- Research Center of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Weihua Dan
- Key Laboratory of Leather Chemistry and Engineering (Ministry of Education), Sichuan University, Chengdu 610065, China
- Research Center of Biomedical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Yunbing Wang
- National Engineering Research Center for Biomaterials, Sichuan University, 29 Wang Jiang Road, Chengdu 610065, China
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Ghatak S, Khanna S, Roy S, Thirunavukkarasu M, Pradeep SR, Wulff BC, El Masry MS, Sharma A, Palakurti R, Ghosh N, Xuan Y, Wilgus TA, Maulik N, Yoder MC, Sen CK. Driving adult tissue repair via re-engagement of a pathway required for fetal healing. Mol Ther 2023; 31:454-470. [PMID: 36114673 PMCID: PMC9931555 DOI: 10.1016/j.ymthe.2022.09.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 08/16/2022] [Accepted: 09/06/2022] [Indexed: 02/07/2023] Open
Abstract
Fetal cutaneous wound closure and repair differ from that in adulthood. In this work, we identify an oxidant stress sensor protein, nonselenocysteine-containing phospholipid hydroperoxide glutathione peroxidase (NPGPx), that is abundantly expressed in normal fetal epidermis (and required for fetal wound closure), though not in adult epidermis, but is variably re-induced upon adult tissue wounding. NPGPx is a direct target of the miR-29 family. Following injury, abundance of miR-29 is lowered, permitting a prompt increase in NPGPx transcripts and protein expression in adult wound-edge tissue. NPGPx expression was required to mediate increased keratinocyte migration induced by miR-29 inhibition in vitro and in vivo. Increased NPGPx expression induced increased SOX2 expression and β-catenin nuclear localization in keratinocytes. Augmenting physiologic NPGPx expression via experimentally induced miR-29 suppression, using cutaneous tissue nanotransfection or targeted lipid nanoparticle delivery of anti-sense oligonucleotides, proved to be sufficient to overcome the deleterious effects of diabetes on this specific pathway to enhance tissue repair.
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Affiliation(s)
- Subhadip Ghatak
- Indiana Center for Regenerative Medicine & Engineering, Indiana University Health Comprehensive Wound Center, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Savita Khanna
- Indiana Center for Regenerative Medicine & Engineering, Indiana University Health Comprehensive Wound Center, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Sashwati Roy
- Indiana Center for Regenerative Medicine & Engineering, Indiana University Health Comprehensive Wound Center, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Mahesh Thirunavukkarasu
- Department of Surgery, Molecular Cardiology and Angiogenesis Laboratory, University of Connecticut Health, Farmington, CT 06030, USA
| | - Seetur R Pradeep
- Department of Surgery, Molecular Cardiology and Angiogenesis Laboratory, University of Connecticut Health, Farmington, CT 06030, USA
| | - Brian C Wulff
- Department of Pathology, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Mohamed S El Masry
- Indiana Center for Regenerative Medicine & Engineering, Indiana University Health Comprehensive Wound Center, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA; Department of Plastic Surgery, Zagazig University, Zagazig 44519, Egypt
| | - Anu Sharma
- Indiana Center for Regenerative Medicine & Engineering, Indiana University Health Comprehensive Wound Center, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Ravichand Palakurti
- Indiana Center for Regenerative Medicine & Engineering, Indiana University Health Comprehensive Wound Center, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Nandini Ghosh
- Indiana Center for Regenerative Medicine & Engineering, Indiana University Health Comprehensive Wound Center, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Yi Xuan
- Indiana Center for Regenerative Medicine & Engineering, Indiana University Health Comprehensive Wound Center, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA; Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Traci A Wilgus
- Department of Pathology, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Nilanjana Maulik
- Department of Surgery, Molecular Cardiology and Angiogenesis Laboratory, University of Connecticut Health, Farmington, CT 06030, USA
| | - Mervin C Yoder
- Indiana Center for Regenerative Medicine & Engineering, Indiana University Health Comprehensive Wound Center, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Chandan K Sen
- Indiana Center for Regenerative Medicine & Engineering, Indiana University Health Comprehensive Wound Center, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA; Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA.
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7
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Manero A, Crawford KE, Prock‐Gibbs H, Shah N, Gandhi D, Coathup MJ. Improving disease prevention, diagnosis, and treatment using novel bionic technologies. Bioeng Transl Med 2023; 8:e10359. [PMID: 36684104 PMCID: PMC9842045 DOI: 10.1002/btm2.10359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 05/09/2022] [Accepted: 05/30/2022] [Indexed: 01/25/2023] Open
Abstract
Increased human life expectancy, due in part to improvements in infant and childhood survival, more active lifestyles, in combination with higher patient expectations for better health outcomes, is leading to an extensive change in the number, type and manner in which health conditions are treated. Over the next decades as the global population rapidly progresses toward a super-aging society, meeting the long-term quality of care needs is forecast to present a major healthcare challenge. The goal is to ensure longer periods of good health, a sustained sense of well-being, with extended periods of activity, social engagement, and productivity. To accomplish these goals, multifunctionalized interfaces are an indispensable component of next generation medical technologies. The development of more sophisticated materials and devices as well as an improved understanding of human disease is forecast to revolutionize the diagnosis and treatment of conditions ranging from osteoarthritis to Alzheimer's disease and will impact disease prevention. This review examines emerging cutting-edge bionic materials, devices and technologies developed to advance disease prevention, and medical care and treatment in our elderly population including developments in smart bandages, cochlear implants, and the increasing role of artificial intelligence and nanorobotics in medicine.
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Affiliation(s)
- Albert Manero
- Limbitless SolutionsUniversity of Central FloridaOrlandoFloridaUSA
- Biionix ClusterUniversity of Central FloridaOrlandoFloridaUSA
| | - Kaitlyn E. Crawford
- Biionix ClusterUniversity of Central FloridaOrlandoFloridaUSA
- Department of Materials Science and EngineeringUniversity of Central FloridaOrlandoFloridaUSA
| | | | - Neel Shah
- College of MedicineUniversity of Central FloridaOrlandoFloridaUSA
| | - Deep Gandhi
- College of MedicineUniversity of Central FloridaOrlandoFloridaUSA
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Mohamed A, Raval YS, Gelston S, Tibbits G, Ay SU, Flurin L, Greenwood-Quaintance KE, Patel R, Beyenal H. Anti-Biofilm Activity of a Tunable Hypochlorous Acid-Generating Electrochemical Bandage Controlled By a Wearable Potentiostat. ADVANCED ENGINEERING MATERIALS 2023; 25:2200792. [PMID: 36817722 PMCID: PMC9937732 DOI: 10.1002/adem.202200792] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Indexed: 05/07/2023]
Abstract
Chronic wound biofilm infections represent a major clinical challenge which results in a substantial burden to patients and healthcare systems. Treatment with topical antibiotics is oftentimes ineffective as a result of antibiotic-resistant microorganisms and biofilm-specific antibiotic tolerance. Use of biocides such as hypochlorous acid (HOCl) has gained increasing attention due to the lack of known resistance mechanisms. We designed an HOCl-generating electrochemical bandage (e-bandage) that delivers HOCl continuously at low concentrations targeting infected wound beds in a similar manner to adhesive antimicrobial wound dressings. We developed a battery-operated wearable potentiostat that controls the e-bandage electrodes at potentials suitable for HOCl generation. We demonstrated that e-bandage treatment was tunable by changing the applied potential. HOCl generation on electrode surfaces was verified using microelectrodes. The developed e-bandage showed time-dependent responses against in vitro Acinetobacter baumannii and Staphylococcus aureus biofilms, reducing viable cells to non-detectable levels within 6 and 12 hours of treatment, respectively. The developed e-bandage should be further evaluated as an alternative to topical antibiotics to treat wound biofilm infections.
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Affiliation(s)
- Abdelrhman Mohamed
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Pullman, WA, USA
| | - Yash S. Raval
- Division of Clinical Microbiology, Mayo Clinic, Rochester, MN, USA
| | - Suzanne Gelston
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Pullman, WA, USA
| | - Gretchen Tibbits
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Pullman, WA, USA
| | - Suat U. Ay
- Department of Electrical and Computer Engineering, University of Idaho, Moscow
| | - Laure Flurin
- Division of Clinical Microbiology, Mayo Clinic, Rochester, MN, USA
- Department of Intensive Care, University Hospital of Guadeloupe, Pointe-à-Pitre, France
| | | | - Robin Patel
- Division of Clinical Microbiology, Mayo Clinic, Rochester, MN, USA
- Division of Public Health, Infectious Diseases, and Occupational Medicine, Mayo Clinic, Rochester, MN, USA
| | - Haluk Beyenal
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Pullman, WA, USA
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Chen V, Burgess JL, Verpile R, Tomic-Canic M, Pastar I. Novel Diagnostic Technologies and Therapeutic Approaches Targeting Chronic Wound Biofilms and Microbiota. CURRENT DERMATOLOGY REPORTS 2022; 11:60-72. [PMID: 37007641 PMCID: PMC10065746 DOI: 10.1007/s13671-022-00354-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Purpose of Review To provide an up-to-date overview of recent developments in diagnostic methods and therapeutic approaches for chronic wound biofilms and pathogenic microbiota. Recent Findings Biofilm infections are one of the major contributors to impaired wound healing in chronic wounds, including diabetic foot ulcers, venous leg ulcers, pressure ulcers, and nonhealing surgical wounds. As an organized microenvironment commonly including multiple microbial species, biofilms develop and persist through methods that allow evasion from host immune response and antimicrobial treatments. Suppression and reduction of biofilm infection have been demonstrated to improve wound healing outcomes. However, chronic wound biofilms are a challenge to treat due to limited methods for accurate, accessible clinical identification and the biofilm's protective properties against therapeutic agents. Here we review recent approaches towards visual markers for less invasive, enhanced biofilm detection in the clinical setting. We outline progress in wound care treatments including investigation of their antibiofilm effects, such as with hydrosurgical and ultrasound debridement, negative pressure wound therapy with instillation, antimicrobial peptides, nanoparticles and nanocarriers, electroceutical dressings, and phage therapy. Summary Current evidence for biofilm-targeted treatments has been primarily conducted in preclinical studies, with limited clinical investigation for many therapies. Improved identification, monitoring, and treatment of biofilms require expansion of point-of-care visualization methods and increased evaluation of antibiofilm therapies in robust clinical trials.
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10
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Das A, Madeshiya AK, Biswas N, Ghosh N, Gorain M, Rawat A, Mahajan SP, Khanna S, Sen CK, Roy S. Oncostatin M Improves Cutaneous Wound Re-Epithelialization and Is Deficient under Diabetic Conditions. J Invest Dermatol 2022; 142:679-691.e3. [PMID: 34534575 PMCID: PMC8860865 DOI: 10.1016/j.jid.2021.04.039] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 03/03/2021] [Accepted: 04/12/2021] [Indexed: 11/29/2022]
Abstract
Impaired re-epithelialization characterized by hyperkeratotic nonmigratory wound epithelium is a hallmark of nonhealing diabetic wounds. In chronic wounds, the copious release of oncostatin M (OSM) from wound macrophages is evident. OSM is a potent keratinocyte (KC) activator. This work sought to understand the signal transduction pathway responsible for wound re-epithelialization, the primary mechanism underlying wound closure. Daily topical treatment of full-thickness excisional wounds of C57BL/6 mice with recombinant murine OSM improved wound re-epithelialization and accelerated wound closure by bolstering KC proliferation and migration. OSM activated the Jak-signal transducer and activator of transcription pathway as manifested by signal transducer and activator of transcription 3 phosphorylation. Such signal transduction in the human KC induced TP63, the master regulator of KC function. Elevated TP63 induced ITGB1, a known effector of KC migration. In diabetic wounds, OSM was more abundant than the level in nondiabetic wounds. However, in diabetic wounds, OSM activity was compromised by glycation. Aminoguanidine, a deglycation agent, rescued the compromised KC migration caused by glycated OSM. Finally, topical application of recombinant OSM improved KC migration and accelerated wound closure in db/db mice. This work recognizes that despite its abundance at the wound site, OSM is inactivated by glycation, and topical delivery of exogenous OSM is likely to be productive in accelerating diabetic wound closure.
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Affiliation(s)
- Amitava Das
- Department of Surgery, IU Health Comprehensive Wound Center, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, IN, 46202
| | - Amit K. Madeshiya
- Department of Surgery, IU Health Comprehensive Wound Center, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, IN, 46202
| | - Nirupam Biswas
- Department of Surgery, IU Health Comprehensive Wound Center, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, IN, 46202
| | - Nandini Ghosh
- Department of Surgery, IU Health Comprehensive Wound Center, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, IN, 46202
| | - Mahadeo Gorain
- Department of Surgery, IU Health Comprehensive Wound Center, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, IN, 46202
| | - Atul Rawat
- Department of Surgery, IU Health Comprehensive Wound Center, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, IN, 46202
| | - Sanskruti P. Mahajan
- Department of Surgery, IU Health Comprehensive Wound Center, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, IN, 46202
| | - Savita Khanna
- Department of Surgery, IU Health Comprehensive Wound Center, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, IN, 46202
| | - Chandan K. Sen
- Department of Surgery, IU Health Comprehensive Wound Center, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, IN, 46202
| | - Sashwati Roy
- Department of Surgery, IU Health Comprehensive Wound Center, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, Indiana, USA.
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11
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Safina I, Childress LT, Myneni SR, Vang KB, Biris AS. Cell-Biomaterial Constructs for Wound Healing and Skin Regeneration. Drug Metab Rev 2022; 54:63-94. [PMID: 35129408 DOI: 10.1080/03602532.2021.2025387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Over the years, conventional skin grafts, such as full-thickness, split-thickness, and pre-sterilized grafts from human or animal sources, have been at the forefront of skin wound care. However, these conventional grafts are associated with major challenges, including supply shortage, rejection by the immune system, and disease transmission following transplantation. Due to recent progress in nanotechnology and material sciences, advanced artificial skin grafts-based on the fundamental concepts of tissue engineering-are quickly evolving for wound healing and regeneration applications, mainly because they can be uniquely tailored to meet the requirements of specific injuries. Despite tremendous progress in tissue engineering, many challenges and uncertainties still face skin grafts in vivo, such as how to effectively coordinate the interaction between engineered biomaterials and the immune system to prevent graft rejection. Furthermore, in-depth studies on skin regeneration at the molecular level are lacking; as a consequence, the development of novel biomaterial-based systems that interact with the skin at the core level has also been slow. This review will discuss 1) the biological aspects of wound healing and skin regeneration, 2) important characteristics and functions of biomaterials for skin regeneration applications, and 3) synthesis and applications of common biomaterials for skin regeneration. Finally, the current challenges and future directions of biomaterial-based skin regeneration will be addressed.
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Affiliation(s)
- Ingrid Safina
- Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, 2801 S. University Avenue, Little Rock, AR 72204 USA
| | - Luke T Childress
- Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, 2801 S. University Avenue, Little Rock, AR 72204 USA
| | - Srinivas R Myneni
- Department of Periodontology, Stony Brook University, Stony Brook, NY 11794 USA
| | - Kieng Bao Vang
- Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, 2801 S. University Avenue, Little Rock, AR 72204 USA
| | - Alexandru S Biris
- Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, 2801 S. University Avenue, Little Rock, AR 72204 USA
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12
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Heald R, Salyer S, Ham K, Wilgus TA, Subramaniam VV, Prakash S. Electroceutical treatment of infected chronic wounds in a dog and a cat. Vet Surg 2022; 51:520-527. [PMID: 34994470 DOI: 10.1111/vsu.13758] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 09/27/2021] [Accepted: 12/10/2021] [Indexed: 02/04/2023]
Abstract
OBJECTIVES To describe the use of an innovative printed electroceutical dressing (PED) to treat non-healing, infected chronic wounds in one dog and one cat and report outcomes. ANIMALS A 4-year-old female spayed Mastiff and a 1-year-old female spayed domestic shorthair cat. STUDY DESIGN Short case series. METHODS Both cases had chronic wounds (duration: approximately 1 year for the dog and 6 3/4 months for the cat) that remained open and infected despite various wound management strategies. Both animals were treated with the PED. Observations from the records regarding wound size, antimicrobial susceptibility, and the time to healing were recorded. RESULTS After 10 days of PED treatment in the dog and 17 days of PED treatment in the cat, the wounds had decreased in size by approximately 4.2 times in the dog and 2.5 times in the cat. Culture of punch biopsies yielded negative results. Wounds were clinically healed at 67 days in the dog and 47 days in the cat. No further treatment of the wounds was required beyond that point. CONCLUSION Application of a PED led to closure of two chronic wounds and resolution of their persistent infection. CLINICAL SIGNIFICANCE PEDs may provide a new treatment modality to mitigate infection and promote healing of chronic wounds.
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Affiliation(s)
- Rachel Heald
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, Ohio, USA
| | - Sarah Salyer
- Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, Ohio, USA
| | - Kathleen Ham
- Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, Ohio, USA.,Department of Small Animal Clinical Sciences, University of Florida, Gainesville, Florida, USA
| | - Traci A Wilgus
- Department of Pathology, The Ohio State University, Columbus, Ohio, USA
| | - Vish V Subramaniam
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, Ohio, USA
| | - Shaurya Prakash
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, Ohio, USA
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13
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Yu R, Zhang H, Guo B. Conductive Biomaterials as Bioactive Wound Dressing for Wound Healing and Skin Tissue Engineering. NANO-MICRO LETTERS 2021; 14:1. [PMID: 34859323 PMCID: PMC8639891 DOI: 10.1007/s40820-021-00751-y] [Citation(s) in RCA: 239] [Impact Index Per Article: 79.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 10/29/2021] [Indexed: 05/06/2023]
Abstract
Conductive biomaterials based on conductive polymers, carbon nanomaterials, or conductive inorganic nanomaterials demonstrate great potential in wound healing and skin tissue engineering, owing to the similar conductivity to human skin, good antioxidant and antibacterial activities, electrically controlled drug delivery, and photothermal effect. However, a review highlights the design and application of conductive biomaterials for wound healing and skin tissue engineering is lacking. In this review, the design and fabrication methods of conductive biomaterials with various structural forms including film, nanofiber, membrane, hydrogel, sponge, foam, and acellular dermal matrix for applications in wound healing and skin tissue engineering and the corresponding mechanism in promoting the healing process were summarized. The approaches that conductive biomaterials realize their great value in healing wounds via three main strategies (electrotherapy, wound dressing, and wound assessment) were reviewed. The application of conductive biomaterials as wound dressing when facing different wounds including acute wound and chronic wound (infected wound and diabetic wound) and for wound monitoring is discussed in detail. The challenges and perspectives in designing and developing multifunctional conductive biomaterials are proposed as well.
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Affiliation(s)
- Rui Yu
- State Key Laboratory for Mechanical Behavior of Materials, and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, People's Republic of China
| | - Hualei Zhang
- State Key Laboratory for Mechanical Behavior of Materials, and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, People's Republic of China
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, 710049, People's Republic of China
| | - Baolin Guo
- State Key Laboratory for Mechanical Behavior of Materials, and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, People's Republic of China.
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, 710049, People's Republic of China.
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14
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Khona DK, Roy S, Ghatak S, Huang K, Jagdale G, Baker LA, Sen CK. Ketoconazole resistant Candida albicans is sensitive to a wireless electroceutical wound care dressing. Bioelectrochemistry 2021; 142:107921. [PMID: 34419917 PMCID: PMC8788813 DOI: 10.1016/j.bioelechem.2021.107921] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 07/27/2021] [Accepted: 07/31/2021] [Indexed: 01/22/2023]
Abstract
Wireless electroceutical dressing (WED) fabric kills bacteria and disrupts bacterial biofilm. This work tested, comparing with standard of care topical antibiotic ketoconazole, whether the weak electric field generated by WED is effective to manage infection caused by ketoconazole-resistant yeast Candida albicans. WED inhibited Candida albicans biofilm formation and planktonic growth. Unlike ketoconazole, WED inhibited yeast to hyphal transition and downregulated EAP1 curbing cell attachment. In response to WED-dependent down-regulation of biofilm-forming BRG1 and ROB1, BCR1 expression was markedly induced in what seems to be a futile compensatory response. WED induced NRG1 and TUP1, negative regulators of filamentation; it down-regulated EFG1, a positive regulator of hyphal pathway. Consistent with the anti-hyphal properties of WED, the expression of ALS3 and HWP1 were diminished. Ketoconazole failed to reproduce the effects of WED on NRG1, TUP1 and EFG1. WED blunted efflux pump activity; this effect was in direct contrast to that of ketoconazole. WED exposure compromised cellular metabolism. In the presence of ketoconazole, the effect was synergistic. Unlike ketoconazole, WED caused membrane depolarization, changes in cell wall composition and loss of membrane integrity. This work presents first evidence that weak electric field is useful in managing pathogens which are otherwise known to be antibiotic resistant.
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Affiliation(s)
- Dolly K Khona
- Indiana Center for Regenerative Medicine & Engineering, Indiana University Health Comprehensive Wound Center, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, United States
| | - Sashwati Roy
- Indiana Center for Regenerative Medicine & Engineering, Indiana University Health Comprehensive Wound Center, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, United States
| | - Subhadip Ghatak
- Indiana Center for Regenerative Medicine & Engineering, Indiana University Health Comprehensive Wound Center, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, United States
| | - Kaixiang Huang
- Department of Chemistry, Indiana University, Bloomington, IN 47405, United States
| | - Gargi Jagdale
- Department of Chemistry, Indiana University, Bloomington, IN 47405, United States
| | - Lane A Baker
- Department of Chemistry, Indiana University, Bloomington, IN 47405, United States
| | - Chandan K Sen
- Indiana Center for Regenerative Medicine & Engineering, Indiana University Health Comprehensive Wound Center, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, United States.
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Electroceutical fabric lowers zeta potential and eradicates coronavirus infectivity upon contact. Sci Rep 2021; 11:21723. [PMID: 34741051 PMCID: PMC8571396 DOI: 10.1038/s41598-021-00910-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Accepted: 10/11/2021] [Indexed: 12/15/2022] Open
Abstract
Coronavirus with intact infectivity attached to PPE surfaces pose significant threat to the spread of COVID-19. We tested the hypothesis that an electroceutical fabric, generating weak potential difference of 0.5 V, disrupts the infectivity of coronavirus upon contact by destabilizing the electrokinetic properties of the virion. Porcine respiratory coronavirus AR310 particles (105) were placed in direct contact with the fabric for 1 or 5 min. Following one minute of contact, zeta potential of the porcine coronavirus was significantly lowered indicating destabilization of its electrokinetic properties. Size-distribution plot showed appearance of aggregation of the virus. Testing of the cytopathic effects of the virus showed eradication of infectivity as quantitatively assessed by PI-calcein and MTT cell viability tests. This work provides the rationale to consider the studied electroceutical fabric, or other materials with comparable property, as material of choice for the development of PPE in the fight against COVID-19.
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16
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Wu M, Rubin AE, Dai T, Schloss R, Usta OB, Golberg A, Yarmush M. High-Voltage, Pulsed Electric Fields Eliminate Pseudomonas aeruginosa Stable Infection in a Mouse Burn Model. Adv Wound Care (New Rochelle) 2021; 10:477-489. [PMID: 33066719 PMCID: PMC8260897 DOI: 10.1089/wound.2019.1147] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Accepted: 10/12/2020] [Indexed: 12/19/2022] Open
Abstract
Objective: The incidence of severe infectious complications after burn injury increases mortality by 40%. However, traditional approaches for managing burn infections are not always effective. High-voltage, pulsed electric field (PEF) treatment shortly after a burn injury has demonstrated an antimicrobial effect in vivo; however, the working parameters and long-term effects of PEF treatment have not yet been investigated. Approach: Nine sets of PEF parameters were investigated to optimize the applied voltage, pulse duration, and frequency or pulse repetition for disinfection of Pseudomonas aeruginosa infection in a stable mouse burn wound model. The bacterial load after PEF administration was monitored for 3 days through bioluminescence imaging. Histological assessments and inflammation response analyses were performed at 1 and 24 h after the therapy. Results: Among all tested PEF parameters, the best disinfection efficacy of P. aeruginosa infection was achieved with a combination of 500 V, 100 μs, and 200 pulses delivered at 3 Hz through two plate electrodes positioned 1 mm apart for up to 3 days after the injury. Histological examinations revealed fewer inflammatory signs in PEF-treated wounds compared with untreated infected burns. Moreover, the expression levels of multiple inflammatory-related cytokines (interleukin [IL]-1α/β, IL-6, IL-10, leukemia inhibitory factor [LIF], and tumor necrosis factor-alpha [TNF-α]), chemokines (macrophage inflammatory protein [MIP]-1α/β and monocyte chemoattractant protein-1 [MCP-1]), and inflammation-related factors (vascular endothelial growth factor [VEGF], macrophage colony-stimulating factor [M-CSF], and granulocyte-macrophage colony-stimulating factor [G-CSF]) were significantly decreased in the infected burn wound after PEF treatment. Innovation: We showed that PEF treatment on infected wounds reduces the P. aeruginosa load and modulates inflammatory responses. Conclusion: The data presented in this study suggest that PEF treatment is a potent candidate for antimicrobial therapy for P. aeruginosa burn infections.
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Affiliation(s)
- Mengjie Wu
- Department of Orthodontics, The Affiliated Stomatology Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Center of Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Andrey Ethan Rubin
- Porter School of Environment and Earth Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Tianhong Dai
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Vaccine and Immunotherapy Center, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Rene Schloss
- Department of Biomedical Engineering, Rutgers University, Piscataway, New Jersey, USA
| | - Osman Berk Usta
- Center of Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Alexander Golberg
- Porter School of Environment and Earth Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Martin Yarmush
- Center of Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Department of Biomedical Engineering, Rutgers University, Piscataway, New Jersey, USA
- Shriners Burn Hospital for Children, Boston, Massachusetts, USA
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17
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Abstract
LEARNING OBJECTIVES After studying this article, the participant should be able to: 1. Understand the basics of biofilm infection and be able to distinguish between planktonic and biofilm modes of growth. 2. Have a working knowledge of conventional and emerging antibiofilm therapies and their modes of action as they pertain to wound care. 3. Understand the challenges associated with testing and marketing antibiofilm strategies and the context within which these strategies may have effective value. SUMMARY The Centers for Disease Control and Prevention estimate for human infectious diseases caused by bacteria with a biofilm phenotype is 65 percent and the National Institutes of Health estimate is closer to 80 percent. Biofilms are hostile microbial aggregates because, within their polymeric matrix cocoons, they are protected from antimicrobial therapy and attack from host defenses. Biofilm-infected wounds, even when closed, show functional deficits such as deficient extracellular matrix and impaired barrier function, which are likely to cause wound recidivism. The management of invasive wound infection often includes systemic antimicrobial therapy in combination with débridement of wounds to a healthy tissue bed as determined by the surgeon who has no way of visualizing the biofilm. The exceedingly high incidence of false-negative cultures for bacteria in a biofilm state leads to missed diagnoses of wound infection. The use of topical and parenteral antimicrobial therapy without wound débridement have had limited impact on decreasing biofilm infection, which remains a major problem in wound care. Current claims to manage wound biofilm infection rest on limited early-stage data. In most cases, such data originate from limited experimental systems that lack host immune defense. In making decisions on the choice of commercial products to manage wound biofilm infection, it is important to critically appreciate the mechanism of action and significance of the relevant experimental system. In this work, the authors critically review different categories of antibiofilm products, with emphasis on their strengths and limitations as evident from the published literature.
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Affiliation(s)
- Chandan K Sen
- From the Indiana University Health Comprehensive Wound Center, the Indiana Center for Regenerative Medicine & Engineering, and the Indiana University School of Medicine
| | - Sashwati Roy
- From the Indiana University Health Comprehensive Wound Center, the Indiana Center for Regenerative Medicine & Engineering, and the Indiana University School of Medicine
| | - Shomita S Mathew-Steiner
- From the Indiana University Health Comprehensive Wound Center, the Indiana Center for Regenerative Medicine & Engineering, and the Indiana University School of Medicine
| | - Gayle M Gordillo
- From the Indiana University Health Comprehensive Wound Center, the Indiana Center for Regenerative Medicine & Engineering, and the Indiana University School of Medicine
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18
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Farber PL, Isoldi FC, Ferreira LM. Electric Factors in Wound Healing. Adv Wound Care (New Rochelle) 2021; 10:461-476. [PMID: 32870772 DOI: 10.1089/wound.2019.1114] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Significance: Electric factors such as electric charges, electrodynamic field, skin battery, and interstitial exclusion permeate wound healing physiology and physiopathology from injury to re-epithelialization. The understanding of how electric factors contribute to wound healing and how treatments may interfere with them is fundamental for the development of better strategies for the management of pathological scarring and chronic wounds. Recent Advances: Angiogenesis, cell migration, macrophage activation hemorheology, and microcirculation can interfere and be interfered with electric factors. New treatments with various types of electric currents, laser, light emitting diode, acupuncture, and weak electric fields applied directly on the wound have been developed to improve wound healing. Critical Issues: Despite the basic and clinical development, pathological scars such as keloids and chronic wounds are still a challenge. Future Directions: New treatments can be developed to improve skin wound healing taking into account the influence of electrical charges. Monitoring electrical activity during skin healing and the influence of treatments on hemorheology and microcirculation are examples of how to use knowledge of electrical factors to increase their effectiveness.
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Affiliation(s)
| | - Felipe Contoli Isoldi
- Surgery Department, Plastic Surgery Division, Postgraduated Program in Translational Surgery, Universidade Federal de São Paulo (Unifesp), São Paulo, Brazil
| | - Lydia Masako Ferreira
- Surgery Department, Plastic Surgery Division, Postgraduated Program in Translational Surgery, Universidade Federal de São Paulo (Unifesp), São Paulo, Brazil
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19
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Korupalli C, Li H, Nguyen N, Mi F, Chang Y, Lin Y, Sung H. Conductive Materials for Healing Wounds: Their Incorporation in Electroactive Wound Dressings, Characterization, and Perspectives. Adv Healthc Mater 2021; 10:e2001384. [PMID: 33274846 DOI: 10.1002/adhm.202001384] [Citation(s) in RCA: 64] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 11/06/2020] [Indexed: 12/11/2022]
Abstract
The use of conductive materials to promote the activity of electrically responsive cells is an effective means of accelerating wound healing. This article focuses on recent advancements in conductive materials, with emphasis on overviewing their incorporation with non-conducting polymers to fabricate electroactive wound dressings. The characteristics of these electroactive dressings are deliberated, and the mechanisms on how they accelerate the wound healing process are discussed. Potential directions for the future development of electroactive wound dressings and their potential in monitoring the course of wound healing in vivo concomitantly are also proposed.
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Affiliation(s)
- Chiranjeevi Korupalli
- Department of Chemical Engineering and Frontier Research Center on Fundamental and Applied Sciences of Matters National Tsing Hua University Hsinchu Taiwan 300 ROC
| | - Hui Li
- Department of Chemical Engineering and Frontier Research Center on Fundamental and Applied Sciences of Matters National Tsing Hua University Hsinchu Taiwan 300 ROC
| | - Nhien Nguyen
- Department of Chemical Engineering and Frontier Research Center on Fundamental and Applied Sciences of Matters National Tsing Hua University Hsinchu Taiwan 300 ROC
| | - Fwu‐Long Mi
- Department of Biochemistry and Molecular Cell Biology School of Medicine College of Medicine Taipei Medical University Taipei Taiwan 110 ROC
| | - Yen Chang
- Taipei Tzu Chi Hospital Buddhist Tzu Chi Medical Foundation and School of Medicine Tzu Chi University Hualien Taiwan 970 ROC
| | - Yu‐Jung Lin
- Department of Chemical Engineering and Frontier Research Center on Fundamental and Applied Sciences of Matters National Tsing Hua University Hsinchu Taiwan 300 ROC
- Research Center for Applied Sciences Academia Sinica Taipei Taiwan 11529 ROC
| | - Hsing‐Wen Sung
- Department of Chemical Engineering and Frontier Research Center on Fundamental and Applied Sciences of Matters National Tsing Hua University Hsinchu Taiwan 300 ROC
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Mohana Sundaram P, Rangharajan KK, Akbari E, Hadick TJ, Song JW, Prakash S. Direct current electric field regulates endothelial permeability under physiologically relevant fluid forces in a microfluidic vessel bifurcation model. LAB ON A CHIP 2021; 21:319-330. [PMID: 33319218 PMCID: PMC7855772 DOI: 10.1039/d0lc00507j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Previous in vitro studies have reported on the use of direct current electric fields (DC-EFs) to regulate vascular endothelial permeability, which is important for tissue regeneration and wound healing. However, these studies have primarily used static 2D culture models that lack the fluid mechanical forces associated with blood flow experienced by endothelial cells (ECs) in vivo. Hence, the effect of DC-EF on ECs under physiologically relevant fluid forces is yet to be systematically evaluated. Using a 3D microfluidic model of a bifurcating vessel, we report the role of DC-EF on regulating endothelial permeability when co-applied with physiologically relevant fluid forces that arise at the vessel bifurcation. The application of a 70 V m-1 DC-EF simultaneously with 1 μL min-1 low perfusion rate (generating 3.8 dyn cm-2 stagnation pressure at the bifurcation point and 0.3 dyn cm-2 laminar shear stress in the branched vessel) increased the endothelial permeability 7-fold compared to the static control condition (i.e., without flow and DC-EF). When the perfusion rate was increased to 10 μL min-1 (generating 38 dyn cm-2 stagnation pressure at the bifurcation point and 3 dyn cm-2 laminar shear stress in the branched vessel) while maintaining the same electrical stimulation, a 4-fold increase in endothelial permeability compared to the static control was observed. The lower increase in endothelial permeability for the higher fluid forces but the same DC-EF suggests a competing role between fluid forces and the applied DC-EF. Moreover, the observed increase in endothelial permeability due to combined DC-EF and flow was transient and dependent on the Akt signalling pathway. Collectively, these findings provide significant new insights into how the endothelium serves as an electro-mechanical interface for regulating vessel permeability.
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21
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Gordillo GM, Biswas A, Singh K, Sen A, Guda PR, Miller C, Pan X, Khanna S, Cadenas E, Sen CK. Mitochondria as Target for Tumor Management of Hemangioendothelioma. Antioxid Redox Signal 2021; 34:137-153. [PMID: 32597200 PMCID: PMC7757590 DOI: 10.1089/ars.2020.8059] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 06/11/2020] [Accepted: 06/25/2020] [Indexed: 12/23/2022]
Abstract
Aims: Hemangioendothelioma (HE) may be benign or malignant. Mouse hemangioendothelioma endothelial (EOMA) cells are validated to study mechanisms in HE. This work demonstrates that EOMA cells heavily rely on mitochondria to thrive. Thus, a combination therapy, including weak X-ray therapy (XRT, 0.5 Gy) and a standardized natural berry extract (NBE) was tested. This NBE is known to be effective in managing experimental HE and has been awarded with the Food and Drug Administration Investigational New Drug (FDA-IND) number 140318 for clinical studies on infantile hemangioma. Results: NBE treatment alone selectively attenuated basal oxygen consumption rate of EOMA cells. NBE specifically sensitized EOMA, but not murine aortic endothelial cells to XRT-dependent attenuation of mitochondrial respiration and adenosine triphosphate (ATP) production. Combination treatment, selectively and potently, influenced mitochondrial dynamics in EOMA cells such that fission was augmented. This was achieved by lowering of mitochondrial sirtuin 3 (SIRT3) causing increased phosphorylation of AMP-activated protein kinase (AMPK). A key role of SIRT3 in loss of EOMA cell viability caused by the combination therapy was evident when pyrroloquinoline quinone, an inducer of SIRT3, pretreatment rescued these cells. Innovation and Conclusion: Mitochondria-targeting NBE significantly extended survival of HE-affected mice. The beneficial effect of NBE in combination with weak X-ray therapy was, however, far more potent with threefold increase in murine survival. The observation that safe natural products may target tumor cell mitochondria and sharply lower radiation dosage required for tumor management warrants clinical testing.
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Affiliation(s)
- Gayle M. Gordillo
- Department of Surgery, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Ayan Biswas
- Department of Surgery, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Kanhaiya Singh
- Department of Surgery, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Abhishek Sen
- Department of Surgery, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Poornachander R. Guda
- Department of Surgery, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Caroline Miller
- Electron Microscopy Core, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Xueliang Pan
- Department of Biomedical Informatics, The Ohio State University, Columbus, Ohio, USA
| | - Savita Khanna
- Department of Surgery, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Enrique Cadenas
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, California, USA
| | - Chandan K. Sen
- Department of Surgery, Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, Indiana, USA
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA
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Hosseini ES, Bhattacharjee M, Manjakkal L, Dahiya R. Healing and monitoring of chronic wounds: advances in wearable technologies. Digit Health 2021. [DOI: 10.1016/b978-0-12-818914-6.00014-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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23
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Heald R, Bennett M, Subramaniam VV, Dusane D, Lochab V, Sundaram PM, Salyer S, West J, Stoodley P, Prakash S. Printed Electroceutical Dressings for the Inhibition of Biofilms and Treatment of Chronic Wounds. JOURNAL OF MICROELECTROMECHANICAL SYSTEMS : A JOINT IEEE AND ASME PUBLICATION ON MICROSTRUCTURES, MICROACTUATORS, MICROSENSORS, AND MICROSYSTEMS 2020; 29:918-923. [PMID: 33519170 PMCID: PMC7839981 DOI: 10.1109/jmems.2020.2999260] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
We report on an innovative, fabric-based conformable, and easily fabricated electroceutical wound dressing that inhibits bacterial biofilm infections and shows significant promise for healing chronic wounds. Cyclic voltammetry demonstrates the ability of the electroceutical to produce reactive oxygen species, primarily HOCl that is responsible for bacterial inhibition. In vitro investigation with the lawn biofilm grown on a soft tissue mimic assay shows the efficacy of the dressing against both gram-positive and gram-negative bacteria in the biofilm form. In vivo, the printed electroceutical dressing was utilized as an intervention treatment for a canine subject with a non-healing wound due to a year-long persistent polymicrobial infection. The clinical case study with the canine subject exhibited the applicability in a clinical setting with the results showing infection inhibition within 11 days of initial treatment. This printed electroceutical dressing was integrated with a Bluetooth® enabled circuit allowing remote monitoring of the current flow within the wound bed. The potential to monitor wounds remotely in real-time with a Bluetooth® enabled circuit proposes a new physical biomarker for management of infected, chronic wounds.
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Affiliation(s)
- Rachel Heald
- Rachel Heald, Molly Bennett, Vish V. Subramaniam, Varun Lochab, Prashanth Mohana Sundaram, J. D. West
| | - Molly Bennett
- Rachel Heald, Molly Bennett, Vish V. Subramaniam, Varun Lochab, Prashanth Mohana Sundaram, J. D. West
| | - Vish V. Subramaniam
- Rachel Heald, Molly Bennett, Vish V. Subramaniam, Varun Lochab, Prashanth Mohana Sundaram, J. D. West
| | - Devendra Dusane
- Devendra Dusane was previously with the Department of Microbial Infection and Immunity, The Ohio State University and is now at the Nationwide Children’s Hospital, Columbus, OH, USA
| | - Varun Lochab
- Rachel Heald, Molly Bennett, Vish V. Subramaniam, Varun Lochab, Prashanth Mohana Sundaram, J. D. West
| | - Prashanth Mohana Sundaram
- Rachel Heald, Molly Bennett, Vish V. Subramaniam, Varun Lochab, Prashanth Mohana Sundaram, J. D. West
| | - Sarah Salyer
- Sarah Salyer is with the Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH, USA
| | - J.D. West
- Rachel Heald, Molly Bennett, Vish V. Subramaniam, Varun Lochab, Prashanth Mohana Sundaram, J. D. West
| | - Paul Stoodley
- Paul Stoodley is with the Department of Microbial Infection and Immunity and the Department of Orthopedics, The Ohio State University, Columbus, OH, USA. He is also affiliated with the National Centre for Advanced Tribiology at Southampton and the National Biofilm Innovation Centre, Dept. Mechanical Engineering, University of Southampton, UK
| | - Shaurya Prakash
- Rachel Heald, Molly Bennett, Vish V. Subramaniam, Varun Lochab, Prashanth Mohana Sundaram, J. D. West
- Shaurya Prakash () are all with the Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, OH, USA
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Sen CK, Mathew-Steiner SS, Das A, Sundaresan VB, Roy S. Electroceutical Management of Bacterial Biofilms and Surgical Infection. Antioxid Redox Signal 2020; 33:713-724. [PMID: 32466673 PMCID: PMC7475090 DOI: 10.1089/ars.2020.8086] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 05/27/2020] [Accepted: 05/28/2020] [Indexed: 01/04/2023]
Abstract
Significance: In the host-microbe microenvironment, bioelectrical factors influence microbes and hosts as well as host-microbe interactions. This article discusses relevant mechanistic underpinnings of this novel paradigm. It also addresses how such knowledge may be leveraged to develop novel electroceutical solutions to manage biofilm infection. Recent Advances: Systematic review and meta-analysis of several hundred wound studies reported a 78.2% prevalence of biofilms in chronic wounds. Biofilm infection is a major cause of delayed wound healing. In the host-microbe microenvironment, bioelectrical factors influence interactions between microbes and hosts. Critical Issues: Rapid biological responses are driven by electrical signals generated by ion currents moving across cell membranes. Bacterial life, growth, and function rely on a bioelectrical milieu, which when perturbed impairs their ability to form a biofilm, a major threat to health care. Electrokinetic stability of several viral particles depend on electrostatic forces. Weak electrical field strength, otherwise safe for humans, can be anti-microbial in this context. In the host, the electric field enhanced keratinocyte migration, bolstered immune defenses, improved mitochondrial function, and demonstrated multiple other effects consistent with supporting wound healing. A deeper mechanistic understanding of bioelectrical principles will inform the design of next-generation electroceuticals. Future Directions: This is an opportune moment in time as there is a surge of interest in electroceuticals in medicine. Projected to reach $35.5 billion by 2025, electroceuticals are becoming a cynosure in the global market. The World Health Organization reports that more than 50% of surgical site infections can be antibiotic resistant. Electroceuticals offer a serious alternative.
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Affiliation(s)
- Chandan K. Sen
- Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Shomita S. Mathew-Steiner
- Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Amitava Das
- Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Vishnu Baba Sundaresan
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, Ohio, USA
| | - Sashwati Roy
- Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, Indiana, USA
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Ofstead CL, Buro BL, Hopkins KM, Eiland JE. The impact of continuous electrical microcurrent on acute and hard-to-heal wounds: a systematic review. J Wound Care 2020; 29:S6-S15. [PMID: 32654615 DOI: 10.12968/jowc.2020.29.sup7.s6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
BACKGROUND Wound infections result in considerable morbidity, mortality and healthcare costs. Antibiotic resistance has complicated wound healing, and new, non-antibiotic-based treatment methods are being developed. AIMS To evaluate evidence on the safety, efficacy and real-world effectiveness of electroceutical devices (ECDs) that provide continuous electrical stimulation to wounds. METHOD A systematic search was conducted to identify primary studies published between 2009 and 2019 that described therapeutic wound treatment using portable ECDs. Studies were included if the ECD delivered continuous electrical current directly to the wound area for the duration of treatment. RESULTS Of 171 citations identified in the search, 13 articles met the inclusion criteria and were analysed. Nine studies evaluated dressings embedded with zinc and silver particles that generated electricity electrochemically, and four evaluated electrode-based units with external batteries. ECDs were effective in healing complex, hard-to-heal wounds that had not responded to other treatments. Four studies showed that ECDs led to complete closure of wounds without complications, and in some cases healed wounds faster than standard of care (SOC). One study found that ECDs resulted in higher ratings by both patients and surgeons than SOC for the progression of wound healing and scar appearance. Additionally, three studies found ECD treatment was less expensive than SOC, due to patients requiring fewer dressing changes or nurse visits. CONCLUSION ECDs appeared to be a safe, effective and cost-effective method for treating severe, complex and challenging wounds, including hard-to-heal wounds, surgical incisions and skin graft donor sites.
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Affiliation(s)
- Cori L Ofstead
- Ofstead & Associates, Inc., 1360 Energy Park Drive, Suite 300, St. Paul, MN 55102
| | - Brandy L Buro
- Ofstead & Associates, Inc., 1360 Energy Park Drive, Suite 300, St. Paul, MN 55102
| | - Krystina M Hopkins
- Ofstead & Associates, Inc., 1360 Energy Park Drive, Suite 300, St. Paul, MN 55102
| | - John E Eiland
- Ofstead & Associates, Inc., 1360 Energy Park Drive, Suite 300, St. Paul, MN 55102
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Zhao S, Mehta AS, Zhao M. Biomedical applications of electrical stimulation. Cell Mol Life Sci 2020; 77:2681-2699. [PMID: 31974658 PMCID: PMC7954539 DOI: 10.1007/s00018-019-03446-1] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 12/12/2019] [Accepted: 12/27/2019] [Indexed: 12/14/2022]
Abstract
This review provides a comprehensive overview on the biomedical applications of electrical stimulation (EStim). EStim has a wide range of direct effects on both biomolecules and cells. These effects have been exploited to facilitate proliferation and functional development of engineered tissue constructs for regenerative medicine applications. They have also been tested or used in clinics for pain mitigation, muscle rehabilitation, the treatment of motor/consciousness disorders, wound healing, and drug delivery. However, the research on fundamental mechanism of cellular response to EStim has fell behind its applications, which has hindered the full exploitation of the clinical potential of EStim. Moreover, despite the positive outcome from the in vitro and animal studies testing the efficacy of EStim, existing clinical trials failed to establish strong, conclusive supports for the therapeutic efficacy of EStim for most of the clinical applications mentioned above. Two potential directions of future research to improve the clinical utility of EStim are presented, including the optimization and standardization of the stimulation protocol and the development of more tissue-matching devices.
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Affiliation(s)
- Siwei Zhao
- Mary and Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, 985965 Nebraska Medical Center, Omaha, NE, 68198, USA.
- Department of Surgery, University of Nebraska Medical Center, Nebraska Medical Center 985965, Omaha, NE, 68198, USA.
| | - Abijeet Singh Mehta
- Department of Dermatology, University of California, Davis, CA, USA
- Department of Ophthalmology & Vision Science, Institute for Regenerative Cures, Center for Neuroscience, University of California at Davis, School of Medicine, Suite 1630, Room 1617, 2921 Stockton Blvd., Sacramento, CA, 95817, USA
| | - Min Zhao
- Department of Dermatology, University of California, Davis, CA, USA
- Department of Ophthalmology & Vision Science, Institute for Regenerative Cures, Center for Neuroscience, University of California at Davis, School of Medicine, Suite 1630, Room 1617, 2921 Stockton Blvd., Sacramento, CA, 95817, USA
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Electric Field Based Dressing Disrupts Mixed-Species Bacterial Biofilm Infection and Restores Functional Wound Healing. Ann Surg 2020; 269:756-766. [PMID: 29099398 DOI: 10.1097/sla.0000000000002504] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
OBJECTIVE This study was designed to employ electroceutical principles, as an alternative to pharmacological intervention, to manage wound biofilm infection. Mechanism of action of a United States Food and Drug Administration-cleared wireless electroceutical dressing (WED) was tested in an established porcine chronic wound polymicrobial biofilm infection model involving inoculation with Pseudomonas aeruginosa PAO1 and Acinetobacter baumannii 19606. BACKGROUND Bacterial biofilms represent a major wound complication. Resistance of biofilm toward pharmacologic interventions calls for alternative therapeutic strategies. Weak electric field has anti-biofilm properties. We have previously reported the development of WED involving patterned deposition of Ag and Zn on fabric. When moistened, WED generates a weak electric field without any external power supply and can be used as any other disposable dressing. METHODS WED dressing was applied within 2 hours of wound infection to test its ability to prevent biofilm formation. Alternatively, WED was applied after 7 days of infection to study disruption of established biofilm. Wounds were treated with placebo dressing or WED twice a week for 56 days. RESULTS Scanning electron microscopy demonstrated that WED prevented and disrupted wound biofilm aggregates. WED accelerated functional wound closure by restoring skin barrier function. WED blunted biofilm-induced expression of (1) P. aeruginosa quorum sensing mvfR (pqsR), rhlR and lasR genes, and (2) miR-9 and silencing of E-cadherin. E-cadherin is critically required for skin barrier function. Furthermore, WED rescued against biofilm-induced persistent inflammation by circumventing nuclear factor kappa B activation and its downstream cytokine responses. CONCLUSION This is the first pre-clinical porcine mechanistic study to recognize the potential of electroceuticals as an effective platform technology to combat wound biofilm infection.
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Singh K, Sinha M, Pal D, Tabasum S, Gnyawali SC, Khona D, Sarkar S, Mohanty SK, Soto-Gonzalez F, Khanna S, Roy S, Sen CK. Cutaneous Epithelial to Mesenchymal Transition Activator ZEB1 Regulates Wound Angiogenesis and Closure in a Glycemic Status-Dependent Manner. Diabetes 2019; 68:2175-2190. [PMID: 31439646 PMCID: PMC6804631 DOI: 10.2337/db19-0202] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 08/15/2019] [Indexed: 12/14/2022]
Abstract
Epithelial to mesenchymal transition (EMT) and wound vascularization are two critical interrelated processes that enable cutaneous wound healing. Zinc finger E-box binding homeobox 1 (ZEB1), primarily studied in the context of tumor biology, is a potent EMT activator. ZEB1 is also known to contribute to endothelial cell survival as well as stimulate tumor angiogenesis. The role of ZEB1 in cutaneous wounds was assessed using Zeb1+/- mice, as Zeb1-/- mice are not viable. Quantitative stable isotope labeling by amino acids in cell culture (SILAC) proteomics was used to elucidate the effect of elevated ZEB1, as noted during hyperglycemia. Under different glycemic conditions, ZEB1 binding to E-cadherin promoter was investigated using chromatin immunoprecipitation. Cutaneous wounding resulted in loss of epithelial marker E-cadherin with concomitant gain of ZEB1. The dominant proteins downregulated after ZEB1 overexpression functionally represented adherens junction pathway. Zeb1+/- mice exhibited compromised wound closure complicated by defective EMT and poor wound angiogenesis. Under hyperglycemic conditions, ZEB1 lost its ability to bind E-cadherin promoter. Keratinocyte E-cadherin, thus upregulated, resisted EMT required for wound healing. Diabetic wound healing was improved in ZEB+/- as well as in db/db mice subjected to ZEB1 knockdown. This work recognizes ZEB1 as a key regulator of cutaneous wound healing that is of particular relevance to diabetic wound complication.
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Affiliation(s)
- Kanhaiya Singh
- Indiana Center for Regenerative Medicine and Engineering, Indiana University Health Comprehensive Wound Center, Indiana University School of Medicine, Indianapolis, IN
- Comprehensive Wound Center, Center for Regenerative Medicine and Cell Based Therapies, Department of Surgery, The Ohio State University Wexner Medical Center, Columbus, OH
| | - Mithun Sinha
- Indiana Center for Regenerative Medicine and Engineering, Indiana University Health Comprehensive Wound Center, Indiana University School of Medicine, Indianapolis, IN
- Comprehensive Wound Center, Center for Regenerative Medicine and Cell Based Therapies, Department of Surgery, The Ohio State University Wexner Medical Center, Columbus, OH
| | - Durba Pal
- Comprehensive Wound Center, Center for Regenerative Medicine and Cell Based Therapies, Department of Surgery, The Ohio State University Wexner Medical Center, Columbus, OH
- Center for Biomedical Engineering, Indian Institute of Technology Ropar, Punjab, India
| | - Saba Tabasum
- Indiana Center for Regenerative Medicine and Engineering, Indiana University Health Comprehensive Wound Center, Indiana University School of Medicine, Indianapolis, IN
- Comprehensive Wound Center, Center for Regenerative Medicine and Cell Based Therapies, Department of Surgery, The Ohio State University Wexner Medical Center, Columbus, OH
| | - Surya C Gnyawali
- Comprehensive Wound Center, Center for Regenerative Medicine and Cell Based Therapies, Department of Surgery, The Ohio State University Wexner Medical Center, Columbus, OH
| | - Dolly Khona
- Indiana Center for Regenerative Medicine and Engineering, Indiana University Health Comprehensive Wound Center, Indiana University School of Medicine, Indianapolis, IN
- Comprehensive Wound Center, Center for Regenerative Medicine and Cell Based Therapies, Department of Surgery, The Ohio State University Wexner Medical Center, Columbus, OH
| | - Subendu Sarkar
- Indiana Center for Regenerative Medicine and Engineering, Indiana University Health Comprehensive Wound Center, Indiana University School of Medicine, Indianapolis, IN
- Comprehensive Wound Center, Center for Regenerative Medicine and Cell Based Therapies, Department of Surgery, The Ohio State University Wexner Medical Center, Columbus, OH
| | - Sujit K Mohanty
- Indiana Center for Regenerative Medicine and Engineering, Indiana University Health Comprehensive Wound Center, Indiana University School of Medicine, Indianapolis, IN
| | - Fidel Soto-Gonzalez
- Comprehensive Wound Center, Center for Regenerative Medicine and Cell Based Therapies, Department of Surgery, The Ohio State University Wexner Medical Center, Columbus, OH
| | - Savita Khanna
- Indiana Center for Regenerative Medicine and Engineering, Indiana University Health Comprehensive Wound Center, Indiana University School of Medicine, Indianapolis, IN
- Comprehensive Wound Center, Center for Regenerative Medicine and Cell Based Therapies, Department of Surgery, The Ohio State University Wexner Medical Center, Columbus, OH
| | - Sashwati Roy
- Indiana Center for Regenerative Medicine and Engineering, Indiana University Health Comprehensive Wound Center, Indiana University School of Medicine, Indianapolis, IN
- Comprehensive Wound Center, Center for Regenerative Medicine and Cell Based Therapies, Department of Surgery, The Ohio State University Wexner Medical Center, Columbus, OH
| | - Chandan K Sen
- Indiana Center for Regenerative Medicine and Engineering, Indiana University Health Comprehensive Wound Center, Indiana University School of Medicine, Indianapolis, IN
- Comprehensive Wound Center, Center for Regenerative Medicine and Cell Based Therapies, Department of Surgery, The Ohio State University Wexner Medical Center, Columbus, OH
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Lin Y, Shao Q, Zhang M, Lu C, Fleming J, Su S. Royal jelly-derived proteins enhance proliferation and migration of human epidermal keratinocytes in an in vitro scratch wound model. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2019; 19:175. [PMID: 31299973 PMCID: PMC6626366 DOI: 10.1186/s12906-019-2592-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 07/04/2019] [Indexed: 12/28/2022]
Abstract
Background Skin injury is inevitable in daily life. In recent years, with the increasing morbidity of diseases such as diabetes and metabolic disorders, chronic wounds have become a considerable challenge in clinical practice. Royal jelly, reported to have multifarious biological and physiological properties, has been used as a remedy for a variety of wounds since ancient times. However, the active components and mechanisms underlying the wound-healing properties of royal jelly are still largely unknown. Methods Water-soluble proteins of royal jelly were fractionated and investigated for the proliferative and migratory effects on human epidermal keratinocytes (HaCaT) in an in vitro wound healing model. The proteins present in bioactive fractions were characterised and quantified using Label-free protein quantification method. The potential functions of these proteins in biological systems were further analysed using bioinformatic tools. Results A protein fraction, mainly containing major royal jelly proteins 2 (MRJP2), MRJP3 and MRJP7, stimulated proliferative and migratory activities in HaCaT cells without visible cytotoxicity. It exerted the greatest effects on the growth of HaCaT cells in the first 48 h. Furthermore, when treated with this protein fraction, the closure rates of the in vitro scratch wound were significantly increased. Functional analysis indicated that MRJP2, MRJP3 and MRJP7 were associated with carbohydrate transport and metabolism. Conclusions We fractionated the water-soluble proteins of royal jelly and identified one fraction (Fraction 2) that induced both proliferative and migratory effects on a human epidermal keratinocyte cell line. Major royal jelly proteins (MRJP2, MRJP3 and/or MRJP7) were speculated to possess potential wound-healing bioactivity. This is the first report that royal jelly may improve wound closure via MRJP-induced cellular proliferation and migration. These proteins may be valuable lead compounds for the development of novel wound healing medications. Our findings would facilitate better understanding of the wound repair mechanisms of royal jelly.
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Singh M, Webster RD, J. Steele TW. Voltaglue Electroceutical Adhesive Patches for Localized Voltage Stimulation. ACS APPLIED BIO MATERIALS 2019; 2:2633-2642. [DOI: 10.1021/acsabm.9b00303] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Manisha Singh
- NTU-Northwestern Institute for Nanomedicine (NNIN), Interdisciplinary Graduate School (IGS), Nanyang Technological University (NTU), 50 Nanyang Drive, Singapore 637553
- School of Materials Science and Engineering (MSE), Division of Materials Technology, Nanyang Technological University (NTU), Singapore 639798
| | - Richard D. Webster
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Terry W. J. Steele
- NTU-Northwestern Institute for Nanomedicine (NNIN), Interdisciplinary Graduate School (IGS), Nanyang Technological University (NTU), 50 Nanyang Drive, Singapore 637553
- School of Materials Science and Engineering (MSE), Division of Materials Technology, Nanyang Technological University (NTU), Singapore 639798
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Roy S, Prakash S, Mathew-Steiner SS, Das Ghatak P, Lochab V, Jones TH, Mohana Sundaram P, Gordillo GM, Subramaniam VV, Sen CK. Disposable Patterned Electroceutical Dressing (PED-10) Is Safe for Treatment of Open Clinical Chronic Wounds. Adv Wound Care (New Rochelle) 2019; 8:149-159. [PMID: 31016066 DOI: 10.1089/wound.2018.0915] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Accepted: 03/03/2019] [Indexed: 12/26/2022] Open
Abstract
Objective: To evaluate if patterned electroceutical dressing (PED) is safe for human chronic wounds treatment as reported by wound care providers. Approach: This work reports a pilot feasibility study with the primary objective to determine physically observable effects of PED application on host tissue response from a safety evaluation point of view. For this pilot study, patients receiving a lower extremity amputation with at least one open wound on the part to be amputated were enrolled. Patients were identified through the Ohio State University Wexner Medical Center (OSUWMC) based on inclusion and exclusion criteria through prescreening through the Comprehensive Wound Center's (CWC) Limb Preservation Program and wound physicians and/or providers at OSUWMC. Wounds were treated with the PED before amputation surgery. Results: The intent of the study was to identify if PED was safe for clinical application based on visual observations of adverse or lack of adverse events on skin and wound tissue. The pilot testing performed on a small cohort (N = 8) of patients showed that with engineered voltage regulation of current flow to the open wound, the PED can be used with little to no visually observable adverse effects on chronic human skin wounds. Innovation: The PED was developed as a second-generation tunable electroceutical wound care dressing, which could potentially be used to treat wounds with deeper infections compared with current state of the art that treats wounds with treatment zone limited to the surface near topical application. Conclusion: Technology advances in design and fabrication of electroceutical dressings were leveraged to develop a tunable laboratory prototype that could be used as a disposable low-cost electroceutical wound care dressing on chronic wounds. Design revisions of PED-1 (1 kΩ ballast resistor) circumvented previously observed adverse effects on the skin in the vicinity of an open wound. PED-10 (including a 10 kΩ ballast resistor) was well tolerated in the small cohort of patients (N = 8) on whom it was tested, and the observations reported here warrant a larger study to determine the clinical impact on human wound healing and infection control.
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Affiliation(s)
- Sashwati Roy
- Department of Surgery, Indiana Center for Regenerative Medicine and Engineering (ICRME), Indiana University School of Medicine, Indianapolis, Indiana
| | - Shaurya Prakash
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, Ohio
| | - Shomita S. Mathew-Steiner
- Department of Surgery, Indiana Center for Regenerative Medicine and Engineering (ICRME), Indiana University School of Medicine, Indianapolis, Indiana
| | - Piya Das Ghatak
- Department of Surgery, Indiana Center for Regenerative Medicine and Engineering (ICRME), Indiana University School of Medicine, Indianapolis, Indiana
| | - Varun Lochab
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, Ohio
| | - Travis H. Jones
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, Ohio
| | | | - Gayle M. Gordillo
- Department of Surgery, Indiana Center for Regenerative Medicine and Engineering (ICRME), Indiana University School of Medicine, Indianapolis, Indiana
| | - Vish V. Subramaniam
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, Ohio
| | - Chandan K. Sen
- Department of Surgery, Indiana Center for Regenerative Medicine and Engineering (ICRME), Indiana University School of Medicine, Indianapolis, Indiana
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Kim H, Izadjoo M. Antimicrobial activity of a bioelectric dressing using an in vitro wound pathogen colony drip-flow reactor biofilm model. J Wound Care 2018; 25:S47-S52. [PMID: 29027847 DOI: 10.12968/jowc.2016.25.sup7.s47] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE We performed in vitro antibiofilm testing of a silver and zinc containing microcurrent generating bioelectric dressing (BED) against clinical wound pathogens to determine its efficacy in preventing biofilm formation under low shear and continuous flow conditions, simulating wound infection environments. METHOD We customised an in vitro colony drip-flow reactor (DFR) biofilm model for efficacy evaluation of BED. Each bacterial pathogen was diluted to 104CFU/ml and inoculated on the polycarbonate filter membrane as an abiotic support. BED and controls (no treatment, gauze, and blank polyester with no silver and zinc) were applied directly on the membranes where bacterial cultures were inoculated. Biofilms were continuously developed onto the membranes for 72 hours at room temperature. Biofilm formation was confirmed by crystal violet staining and microscopic observation. Through vigorous shaking and sonication, the released bacteria were serially diluted, plated, and incubated for 24 hours at 37°C to determine the numbers of surviving bacteria. RESULTS Biofilms were well developed onto blank polyesters, but not the BED after 72 hours incubation. Crystal violet staining from the blank polyesters showed large and fully grown biofilms. We observed an inhibition in bacterial growth on BED treatment. The antibiofilm activity of the BED against each of eight monospecies biofilms showed a 1- or 2 log10 (or 10- or 100-fold) reduction in bacterial numbers compared with those of controls. CONCLUSION Our results demonstrated that colony DFR biofilm model was an appropriate for testing the antibiofilm efficacy of BED under low shear and continuous flow conditions for simulating clinical wound environments. The bioelectric currents generated from the silver and zinc active ingredients in the dressing resulted in antibiofilm activity of this wound care device. DECLARATION OF INTEREST The opinions or assertions contained herein are the private views of the authors, based on scientific investigation, and are not to be construed as official or as reflecting the views of the Department of Defense, the United States Government or any of the authors' employers. Dr. Mina Izadjoo has served as a consultant to Vomaris Innovations Inc.
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Affiliation(s)
- H Kim
- Senior Scientist, Chief Science Officer, Trideum Biosciences, Frederick, Maryland 21704 US
| | - M Izadjoo
- Senior Scientist, Chief Science Officer, Trideum Biosciences, Frederick, Maryland 21704 US
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Cooke CL, Greene RS, van Eck CF, Uquilas C, Limpisvasti O. Bioelectric Silver-Zinc Dressing Equally Effective to Chlorhexidine in Reducing Skin Bacterial Load in Healthy Volunteers. Arthroscopy 2018; 34:2886-2891. [PMID: 30195951 DOI: 10.1016/j.arthro.2018.05.046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2018] [Revised: 04/05/2018] [Accepted: 05/16/2018] [Indexed: 02/02/2023]
Abstract
PURPOSE The aim of the present study was to evaluate and compare the effectiveness of the silver-zinc bioelectric dressing as compared with skin preparation with 2% chlorhexidine or 4% chlorhexidine in reducing the bacterial count on the knee. METHODS Three groups consisting of 48 healthy volunteers were included. Age range was 23 to 54 years old and 60% of participants were male. Each subject had 1 knee serve as the test and the contralateral as the control. The test site was prepared with either 2% chlorhexidine, 4% chlorhexidine, or a silver-zinc bioelectric dressing and after 24 hours skin cultures were taken and examined for bacterial growth. RESULTS In the 2% chlorhexidine group 23 of 48 unprepped knees had positive cultures, compared with 9 of 48 prepped knees (P = .003; risk reduction, 4.0 times). In the 4% chlorhexidine group 25 of 48 unprepped knees had positive cultures, compared with 14 of 48 prepped knees (P = .027; risk reduction, 2.6 times). In the silver-zinc bioelectric dressing group 29 of 48 unprepped knees had positive cultures, compared with 7 of 48 prepped knees (P < .001; risk reduction, 8.9 times). There was no difference in the positive skin culture rate between the 3 methods. CONCLUSIONS Application of the silver-zinc bioelectric dressing was equally effective at reducing skin bacterial load when compared with skin preparation with 2% chlorhexidine or 4% chlorhexidine in healthy volunteers. LEVEL OF EVIDENCE Basic Science - Microbiology. CLINICAL RELEVANCE The findings of this study indicate that the use of a bioelectric dressing after knee surgery can match the standard of care of preparing the skin with an antiseptic before surgery.
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Affiliation(s)
| | - Renee S Greene
- Kerlan Jobe Orthopaedic Clinic, Los Angeles, California, U.S.A
| | | | - Carlos Uquilas
- Kerlan Jobe Orthopaedic Clinic, Los Angeles, California, U.S.A
| | - Orr Limpisvasti
- Kerlan Jobe Orthopaedic Clinic, Los Angeles, California, U.S.A
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Lack of level I evidence on how to prevent infection after elective shoulder surgery. Knee Surg Sports Traumatol Arthrosc 2018; 26:2465-2480. [PMID: 29340748 DOI: 10.1007/s00167-018-4832-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2017] [Accepted: 01/05/2018] [Indexed: 01/02/2023]
Abstract
PURPOSE Infection is a concern after all orthopedic procedures, including shoulder surgery. This systematic review of literature aimed to determine risk factors for infection as well as the availability and effectiveness of measures utilized to prevent infection after elective shoulder surgery. METHODS An electronic database search was performed using MEDLINE (1950-October 2017), EMBASE (1980-October 2017), CINAHL (1982-October 2017), and the Cochrane database to identify studies reporting a risk factor or preventive measure for infection after shoulder surgery. RESULTS Fifty-one studies were eligible for inclusion. Risk factors identified for infection were male sex, the presence of hair, receiving an intra-articular cortisone injection within the 3 months prior to surgery, smoking, obesity, and several comorbidities. The only preventive measure with level I evidence was for the use of chlorhexidine wipes for cleansing the skin in the days prior to surgery and for the use of ChloraPrep or DuraPrep over povodine and iodine to prep the skin at the time of surgery. Level II-IV evidence was found for other infection prevention methods such as intravenous antibiotic prophylaxis. CONCLUSION There are many risk factors associated with developing an infection after elective shoulder surgery. Many preventive measures have been described which may decrease the risk of infection; however, most lack a high level evidence to support them. The findings of this systematic review are clinically relevant as it has been shown that infection after shoulder surgery results in poor patient-reported outcomes and pose a significant financial burden. As surgeons the goal should be to prevent infections to avoid the morbidity for patients and the increased cost for society. LEVEL OF EVIDENCE IV systematic review of literature.
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Vilkhu R, Thio WJC, Ghatak PD, Sen CK, Co AC, Kiourti A. Power Generation for Wearable Electronics: Designing Electrochemical Storage on Fabrics. IEEE ACCESS : PRACTICAL INNOVATIONS, OPEN SOLUTIONS 2018; 6:28945-28950. [PMID: 30034977 PMCID: PMC6049834 DOI: 10.1109/access.2018.2839078] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We report a new class of textiles with electrochemical functions which, when moistened by a conductive liquid (saline solution, sweat, wound fluid, etc.), generate DC voltage and current levels capable of powering wearable electronics on the go. Contrary to previously reported power generation techniques, the proposed fabrics are fully flexible, feel and behave like regular clothing, do not include any rigid components, and provide DC power via moistening by readily available liquids. Our approach entails printed battery cells that are composed of silver and zinc electrodes deposited onto a polyester fabric to generate power in the microwatt range. Electrochemical characterization of the discharge of a single printed battery cell in a 10 M NaOH electrolyte shows reproducible results with a sustained power level of ∼80 μW for over 3 hours. Scalable DC power may also be achieved by connecting multiple battery cells in series via flexible and conductive E-threads. Indeed, a series connection of two battery cells is demonstrated to boost the generated voltage from 1.4 V to 2.5 V. Notably, this in-series printed battery arrangement is shown to successfully power a digital thermometer under both 10 M NaOH, a 0.5 M NaCl solution (mimicking human sweat), and Dulbecco's Phosphate-Buffered Saline solution (DPBS) (mimicking bodily fluid electrolytes). Overall, the proposed technology is expected to be of utmost significance for healthcare, sports, military, and consumer applications, among others.
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Affiliation(s)
- Ramandeep Vilkhu
- Department of Electrical and Computer Engineering, The Ohio State University, Columbus, OH 43210 USA
| | - Wesley Joo-Chen Thio
- Department of Electrical and Computer Engineering, The Ohio State University, Columbus, OH 43210 USA
| | - Piya Das Ghatak
- Department of Surgery, The Ohio State University, Columbus, OH 43210 USA
| | - Chandan K. Sen
- Department of Surgery, The Ohio State University, Columbus, OH 43210 USA
| | - Anne C. Co
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH 43210 USA
| | - Asimina Kiourti
- Department of Electrical and Computer Engineering, The Ohio State University, Columbus, OH 43210 USA
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Li J, Ghatak S, El Masry MS, Das A, Liu Y, Roy S, Lee RJ, Sen CK. Topical Lyophilized Targeted Lipid Nanoparticles in the Restoration of Skin Barrier Function following Burn Wound. Mol Ther 2018; 26:2178-2188. [PMID: 29802017 DOI: 10.1016/j.ymthe.2018.04.021] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 04/19/2018] [Accepted: 04/21/2018] [Indexed: 12/25/2022] Open
Abstract
Lyophilized keratinocyte-targeted nanocarriers (TLNκ) loaded with locked nucleic acid (LNA) modified anti-miR were developed for topical application to full thickness burn injury. TLNκ were designed to selectively deliver LNA-anti-miR-107 to keratinocytes using the peptide sequence ASKAIQVFLLAG. TLNκ employed DOTAP/DODAP combination pH-responsive lipid components to improve endosomal escape. To minimize interference of clearance by non-targeted cells, especially immune cells in the acute wound microenvironment, surface charge was neutralized. Lyophilization was performed to extend the shelf life of the lipid nanoparticles (LNPs). Encapsulation efficiency of anti-miR in lyophilized TLNκ was estimated to be 96.54%. Cargo stability of lyophilized TLNκ was tested. After 9 days of loading with anti-miR-210, TLNκ was effective in lowering abundance of the hypoxamiR miR-210 in keratinocytes challenged with hypoxia. Keratinocyte uptake of DiD-labeled TLNκ was selective and exceeded 90% within 4 hr. Topical application of hydrogel-dispersed lyophilized TLNκ encapsulating LNA anti-miR-107 twice a week significantly accelerated wound closure and restoration of skin barrier function. TLNκ/anti-miR-107 application depleted miR-107 and upregulated dicer expression, which accelerated differentiation of keratinocytes. Expression of junctional proteins such as claudin-1, loricrin, filaggrin, ZO-1, and ZO-2 were significantly upregulated following TLNκ/anti-miR-107 treatment. These LNPs are promising as topical therapeutic agents in the management of burn injury.
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Affiliation(s)
- Jilong Li
- Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH 43210, USA; Division of Pharmaceutics and Pharmaceutical Chemistry, College of Pharmacy, The Ohio State University, Columbus, OH 43210, USA
| | - Subhadip Ghatak
- Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH 43210, USA; Center for Regenerative Medicine and Cell-Based Therapies, The Ohio State University, Columbus, OH 43210, USA
| | - Mohamed S El Masry
- Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH 43210, USA; Department of General Surgery (Plastic Surgery Unit), Zagazig University, 44519, Egypt
| | - Amitava Das
- Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH 43210, USA; Center for Regenerative Medicine and Cell-Based Therapies, The Ohio State University, Columbus, OH 43210, USA
| | - Yang Liu
- Division of Pharmaceutics and Pharmaceutical Chemistry, College of Pharmacy, The Ohio State University, Columbus, OH 43210, USA
| | - Sashwati Roy
- Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH 43210, USA; Center for Regenerative Medicine and Cell-Based Therapies, The Ohio State University, Columbus, OH 43210, USA
| | - Robert J Lee
- Division of Pharmaceutics and Pharmaceutical Chemistry, College of Pharmacy, The Ohio State University, Columbus, OH 43210, USA; Center for Regenerative Medicine and Cell-Based Therapies, The Ohio State University, Columbus, OH 43210, USA
| | - Chandan K Sen
- Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH 43210, USA; Center for Regenerative Medicine and Cell-Based Therapies, The Ohio State University, Columbus, OH 43210, USA.
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37
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Maijer A, Gessner A, Trumpatori B, Varhus JD. Bioelectric Dressing Supports Complex Wound Healing in Small Animal Patients. Top Companion Anim Med 2018; 33:21-28. [DOI: 10.1053/j.tcam.2018.02.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Revised: 02/27/2018] [Accepted: 02/28/2018] [Indexed: 01/27/2023]
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38
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Debridement Techniques and Non–Negative Pressure Wound Therapy Wound Management. Vet Clin North Am Small Anim Pract 2017; 47:1181-1202. [DOI: 10.1016/j.cvsm.2017.06.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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39
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Singh K, Pal D, Sinha M, Ghatak S, Gnyawali SC, Khanna S, Roy S, Sen CK. Epigenetic Modification of MicroRNA-200b Contributes to Diabetic Vasculopathy. Mol Ther 2017; 25:2689-2704. [PMID: 29037594 DOI: 10.1016/j.ymthe.2017.09.009] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 09/01/2017] [Accepted: 09/07/2017] [Indexed: 12/26/2022] Open
Abstract
Hyperglycemia (HG) induces genome-wide cytosine demethylation. Our previous work recognized miR-200b as a critical angiomiR, which must be transiently downregulated to initiate wound angiogenesis. Under HG, miR-200b downregulation is not responsive to injury. Here, we demonstrate that HG may drive vasculopathy by epigenetic modification of a miR promoter. In human microvascular endothelial cells (HMECs), HG also lowered DNA methyltransferases (DNMT-1 and DNMT-3A) and compromised endothelial function as manifested by diminished endothelial nitric oxide (eNOS), lowered LDL uptake, impaired Matrigel tube formation, lower NO production, and compromised VE-cadherin expression. Bisulfite-sequencing documented HG-induced miR-200b promoter hypomethylation in HMECs and diabetic wound-site endothelial cells. In HMECs, HG compromised endothelial function. Methyl donor S-adenosyl-L-methionine (SAM) corrected miR-200b promoter hypomethylaton and rescued endothelial function. In vivo, wound-site administration of SAM to diabetic mice improved wound perfusion by limiting the pathogenic rise of miR-200b. Quantitative stable isotope labeling by amino acids in cell culture (SILAC) proteomics and ingenuity pathway analysis identified HG-induced proteins and principal clusters in HMECs sensitive to the genetic inhibition of miR-200b. This work presents the first evidence of the miR-200b promoter methylation as a critical determinant of diabetic wound angiogenesis.
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Affiliation(s)
- Kanhaiya Singh
- Department of Surgery, Davis Heart and Lung Research Institute, Center for Regenerative Medicine & Cell-Based Therapies, Wexner Medical Center, The Ohio State University, Columbus, OH 43210, USA
| | - Durba Pal
- Department of Surgery, Davis Heart and Lung Research Institute, Center for Regenerative Medicine & Cell-Based Therapies, Wexner Medical Center, The Ohio State University, Columbus, OH 43210, USA
| | - Mithun Sinha
- Department of Surgery, Davis Heart and Lung Research Institute, Center for Regenerative Medicine & Cell-Based Therapies, Wexner Medical Center, The Ohio State University, Columbus, OH 43210, USA
| | - Subhadip Ghatak
- Department of Surgery, Davis Heart and Lung Research Institute, Center for Regenerative Medicine & Cell-Based Therapies, Wexner Medical Center, The Ohio State University, Columbus, OH 43210, USA
| | - Surya C Gnyawali
- Department of Surgery, Davis Heart and Lung Research Institute, Center for Regenerative Medicine & Cell-Based Therapies, Wexner Medical Center, The Ohio State University, Columbus, OH 43210, USA
| | - Savita Khanna
- Department of Surgery, Davis Heart and Lung Research Institute, Center for Regenerative Medicine & Cell-Based Therapies, Wexner Medical Center, The Ohio State University, Columbus, OH 43210, USA
| | - Sashwati Roy
- Department of Surgery, Davis Heart and Lung Research Institute, Center for Regenerative Medicine & Cell-Based Therapies, Wexner Medical Center, The Ohio State University, Columbus, OH 43210, USA
| | - Chandan K Sen
- Department of Surgery, Davis Heart and Lung Research Institute, Center for Regenerative Medicine & Cell-Based Therapies, Wexner Medical Center, The Ohio State University, Columbus, OH 43210, USA.
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Tyler SEB. Nature's Electric Potential: A Systematic Review of the Role of Bioelectricity in Wound Healing and Regenerative Processes in Animals, Humans, and Plants. Front Physiol 2017; 8:627. [PMID: 28928669 PMCID: PMC5591378 DOI: 10.3389/fphys.2017.00627] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2016] [Accepted: 08/11/2017] [Indexed: 12/24/2022] Open
Abstract
Natural endogenous voltage gradients not only predict and correlate with growth and development but also drive wound healing and regeneration processes. This review summarizes the existing literature for the nature, sources, and transmission of information-bearing bioelectric signals involved in controlling wound healing and regeneration in animals, humans, and plants. It emerges that some bioelectric characteristics occur ubiquitously in a range of animal and plant species. However, the limits of similarities are probed to give a realistic assessment of future areas to be explored. Major gaps remain in our knowledge of the mechanistic basis for these processes, on which regenerative therapies ultimately depend. In relation to this, it is concluded that the mapping of voltage patterns and the processes generating them is a promising future research focus, to probe three aspects: the role of wound/regeneration currents in relation to morphology; the role of endogenous flux changes in driving wound healing and regeneration; and the mapping of patterns in organisms of extreme longevity, in contrast with the aberrant voltage patterns underlying impaired healing, to inform interventions aimed at restoring them.
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41
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Barker JC, Khansa I, Gordillo GM. A Formidable Foe Is Sabotaging Your Results: What You Should Know about Biofilms and Wound Healing. Plast Reconstr Surg 2017; 139:1184e-1194e. [PMID: 28445380 DOI: 10.1097/prs.0000000000003325] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
LEARNING OBJECTIVES After reading this article, the participant should be able to: 1. Describe biofilm pathogenesis as it relates to problem wounds. 2. Understand the preclinical and clinical evidence implicating biofilm in problem wounds. 3. Explain the diagnostic and treatment challenges that biofilms create for problem wounds. 4. Demonstrate a basic understanding of emerging strategies aimed at counteracting these processes. SUMMARY Biofilm represents a protected mode of growth for bacteria, allowing them to evade standard diagnostic techniques and avoid eradication by standard therapies. Although only recently discovered, biofilm has existed for millennia and complicates nearly every aspect of medicine. Biofilm impacts wound healing by allowing bacteria to evade immune responses, prolonging inflammation and disabling skin barrier function. It is important to understand why problem wounds persist despite state-of-the-art treatment, why they are difficult to accurately diagnose, and why they recur. The aim of this article is to focus on current gaps in knowledge related to problem wounds, specifically, biofilm infection.
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Affiliation(s)
- Jenny C Barker
- Columbus, Ohio.,From the Department of Plastic Surgery, Comprehensive Wound Center, The Ohio State University
| | - Ibrahim Khansa
- Columbus, Ohio.,From the Department of Plastic Surgery, Comprehensive Wound Center, The Ohio State University
| | - Gayle M Gordillo
- Columbus, Ohio.,From the Department of Plastic Surgery, Comprehensive Wound Center, The Ohio State University
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Chen S, Liu B, Carlson MA, Gombart AF, Reilly DA, Xie J. Recent advances in electrospun nanofibers for wound healing. Nanomedicine (Lond) 2017; 12:1335-1352. [PMID: 28520509 PMCID: PMC6661929 DOI: 10.2217/nnm-2017-0017] [Citation(s) in RCA: 194] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 03/23/2017] [Indexed: 01/08/2023] Open
Abstract
Electrospun nanofibers represent a novel class of materials that show great potential in many biomedical applications including biosensing, regenerative medicine, tissue engineering, drug delivery and wound healing. In this work, we review recent advances in electrospun nanofibers for wound healing. This article begins with a brief introduction on the wound, and then discusses the unique features of electrospun nanofibers critical for wound healing. It further highlights recent studies that have used electrospun nanofibers for wound healing applications and devices, including sutures, multifunctional dressings, dermal substitutes, engineered epidermis and full-thickness skin regeneration. Finally, we finish with conclusions and future perspective in this field.
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Affiliation(s)
- Shixuan Chen
- Department of Surgery–Transplant & Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Bing Liu
- Department of Surgery–Transplant & Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE 68198, USA
- Department of Anorectal Surgery, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, China
| | - Mark A Carlson
- Departments of Surgery & Genetics, Cell Biology & Anatomy, University of Nebraska Medical Center, Omaha, NE 68198, USA
- Department of Surgery, VA Nebraska–Western Iowa Health Care System, Omaha, NE 68105, USA
| | - Adrian F Gombart
- Department of Biochemistry & Biophysics & Linus Pauling Institute, Oregon State University, Corvallis, OR 97331, USA
| | - Debra A Reilly
- Departments of Surgery–Plastic & Reconstructive Surgery, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Jingwei Xie
- Department of Surgery–Transplant & Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE 68198, USA
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43
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Electric field as a potential directional cue in homing of bone marrow-derived mesenchymal stem cells to cutaneous wounds. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2016; 1864:267-279. [PMID: 27864076 DOI: 10.1016/j.bbamcr.2016.11.011] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 11/10/2016] [Accepted: 11/13/2016] [Indexed: 02/02/2023]
Abstract
Bone marrow-derived cells are thought to participate and enhance the healing process contributing to skin cells or releasing regulatory cytokines. Directional cell migration in a weak direct current electric field (DC-EF), known as electrotaxis, may be a way of cell recruitment to the wound site. Here we examined the influence of electric field on bone marrow adherent cells (BMACs) and its potential role as a factor attracting mesenchymal stem cells to cutaneous wounds. We observed that in an external EF, BMAC movement was accelerated and highly directed with distinction of two cell populations migrating toward opposite poles: mesenchymal stem cells migrated toward the cathode, whereas macrophages toward the anode. Analysis of intracellular pathways revealed that macrophage electrotaxis mostly depended on Rho family small GTPases and calcium ions, but interruption of PI3K and Arp2/3 had the most pronounced effect on electrotaxis of MSCs. However, in all cases we observed only a partial decrease in directionality of cell movement after inhibition of certain proteins. Additionally, although we noticed the accumulation of EGFR at the cathodal side of MSCs, it was not involved in electrotaxis. Moreover, the cell reaction to EF was very dynamic with first symptoms occurring within <1min. In conclusion, the physiological DC-EF may act as a factor positioning bone marrow cells within a wound bed and the opposite direction of MSC and macrophage movement did not result either from utilizing different signalling or redistribution of investigated cell surface receptors.
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44
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Rubinsky L, Patrick B, Mikus P, Rubinsky B. Germicide wound pad with active, in situ, electrolytically produced hypochlorous acid. Biomed Microdevices 2016; 18:26. [PMID: 26888442 DOI: 10.1007/s10544-016-0052-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
We describe a new wound dressing technology that can actively generate an inorganic germicide agent, in situ, within the wound pad. The technology provides real time control over the quantitative, spatial and temporal delivery of the germicide. The identity of the germicide is hypochlorous acid (HClO). The HClO is produced in a flexible wound pad, made of a composite of thin (micrometer scale) layers of various materials, with different electrochemical properties that enhance HClO production. Active control over the production of HClO is achieved by control of the pH and of the electric potential across the layers. The effectiveness of the Active HClO Pad (AHClOP) concept is demonstrated in a study on sterilization of E. coli in a deep wound contamination simulating gel. The performance of the AHClOP is compared with that of four commercial wound dressings. Results show that the AHClOP can sterilize throughout the gel, while the commercial dressings cannot.
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Affiliation(s)
- L Rubinsky
- RM2 Technologies LTD., 31 Pegasus Drive, Coto De Caza, CA, 92679, USA
| | - B Patrick
- RM2 Technologies LTD., 31 Pegasus Drive, Coto De Caza, CA, 92679, USA.,Exponent, Inc., 149 Commonwealth Dr., Menlo Park, CA, 94025, USA
| | - P Mikus
- RM2 Technologies LTD., 31 Pegasus Drive, Coto De Caza, CA, 92679, USA
| | - B Rubinsky
- RM2 Technologies LTD., 31 Pegasus Drive, Coto De Caza, CA, 92679, USA. .,Department of Mechanical Engineering, University of California Berkeley, Berkeley, CA, 94720, USA.
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45
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Sultana ST, Call DR, Beyenal H. Maltodextrin enhances biofilm elimination by electrochemical scaffold. Sci Rep 2016; 6:36003. [PMID: 27782161 PMCID: PMC5080540 DOI: 10.1038/srep36003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Accepted: 09/22/2016] [Indexed: 01/08/2023] Open
Abstract
Electrochemical scaffolds (e-scaffolds) continuously generate low concentrations of H2O2 suitable for damaging wound biofilms without damaging host tissue. Nevertheless, retarded diffusion combined with H2O2 degradation can limit the efficacy of this potentially important clinical tool. H2O2 diffusion into biofilms and bacterial cells can be increased by damaging the biofilm structure or by activating membrane transportation channels by exposure to hyperosmotic agents. We hypothesized that e-scaffolds would be more effective against Acinetobacter baumannii and Staphylococcus aureus biofilms in the presence of a hyperosmotic agent. E-scaffolds polarized at -600 mVAg/AgCl were overlaid onto preformed biofilms in media containing various maltodextrin concentrations. E-scaffold alone decreased A. baumannii and S. aureus biofilm cell densities by (3.92 ± 0.15) log and (2.31 ± 0.12) log, respectively. Compared to untreated biofilms, the efficacy of the e-scaffold increased to a maximum (8.27 ± 0.05) log reduction in A. baumannii and (4.71 ± 0.12) log reduction in S. aureus biofilm cell densities upon 10 mM and 30 mM maltodextrin addition, respectively. Overall ~55% decrease in relative biofilm surface coverage was achieved for both species. We conclude that combined treatment with electrochemically generated H2O2 from an e-scaffold and maltodextrin is more effective in decreasing viable biofilm cell density.
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Affiliation(s)
- Sujala T. Sultana
- School of Chemical Engineering & Bioengineering, Washington State University, Pullman, 99164, WA, USA
| | - Douglas R. Call
- Paul G. Allen School for Global Animal Health, Washington State University, Pullman, 99164, WA, USA
| | - Haluk Beyenal
- School of Chemical Engineering & Bioengineering, Washington State University, Pullman, 99164, WA, USA
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Xiao Y, Ahadian S, Radisic M. Biochemical and Biophysical Cues in Matrix Design for Chronic and Diabetic Wound Treatment. TISSUE ENGINEERING PART B-REVIEWS 2016; 23:9-26. [PMID: 27405960 DOI: 10.1089/ten.teb.2016.0200] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Progress in biomaterial science and engineering and increasing knowledge in cell biology have enabled us to develop functional biomaterials providing appropriate biochemical and biophysical cues for tissue regeneration applications. Tissue regeneration is particularly important to treat chronic wounds of people with diabetes. Understanding and controlling the cellular microenvironment of the wound tissue are important to improve the wound healing process. In this study, we review different biochemical (e.g., growth factors, peptides, DNA, and RNA) and biophysical (e.g., topographical guidance, pressure, electrical stimulation, and pulsed electromagnetic field) cues providing a functional and instructive acellular matrix to heal diabetic chronic wounds. The biochemical and biophysical signals generally regulate cell-matrix interactions and cell behavior and function inducing the tissue regeneration for chronic wounds. Some technologies and devices have already been developed and used in the clinic employing biochemical and biophysical cues for wound healing applications. These technologies can be integrated with smart biomaterials to deliver therapeutic agents to the wound tissue in a precise and controllable manner. This review provides useful guidance in understanding molecular mechanisms and signals in the healing of diabetic chronic wounds and in designing instructive biomaterials to treat them.
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Affiliation(s)
- Yun Xiao
- 1 Department of Chemical Engineering and Applied Chemistry, University of Toronto , Toronto, Ontario, Canada .,2 Institute of Biomaterials and Biomedical Engineering, University of Toronto , Toronto, Ontario, Canada
| | - Samad Ahadian
- 2 Institute of Biomaterials and Biomedical Engineering, University of Toronto , Toronto, Ontario, Canada
| | - Milica Radisic
- 1 Department of Chemical Engineering and Applied Chemistry, University of Toronto , Toronto, Ontario, Canada .,2 Institute of Biomaterials and Biomedical Engineering, University of Toronto , Toronto, Ontario, Canada
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47
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Chow J. Wireless Microcurrent-Generating Antimicrobial Wound Dressing in Primary Total Knee Arthroplasty: A Single-Center Experience. Orthop Rev (Pavia) 2016; 8:6296. [PMID: 27433298 PMCID: PMC4933816 DOI: 10.4081/or.2016.6296] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 02/26/2016] [Accepted: 05/16/2016] [Indexed: 12/23/2022] Open
Abstract
The spread of multidrug-resistant bacteria and financial burden of periprosthetic joint infection (PJI) further the need for treatments to address pathogenic contamination and expedite healing. This retrospective study was a chart review of a series of 92 patients who underwent 100 total knee arthroplasties performed by the same surgeon and treated with a novel microcurrent-generating antimicrobial dressing (MCD). Mean hospital length of stay was 2.3±0.9 days, while the mean length of treatment with MCD was 8.3±1.2 days. No major complications, PJI or major infectious complications were reported, with two readmissions (2%) within 30 days of surgery. Knee Society Score function showed statistically significant improvements post-operatively, with a mean six-month score of 75.0±20.3 and mean change from baseline of 36.3±21.1 (P<0.0001). These results support previous findings that use of the MCD may result in improved outcomes as an element in post-operative wound management.
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Affiliation(s)
- James Chow
- Phoenix St. Luke's Medical Center , Phoenix, AZ, USA
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48
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Wages PA, Cheng WY, Gibbs-Flournoy E, Samet JM. Live-cell imaging approaches for the investigation of xenobiotic-induced oxidant stress. Biochim Biophys Acta Gen Subj 2016; 1860:2802-15. [PMID: 27208426 DOI: 10.1016/j.bbagen.2016.05.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2016] [Revised: 05/11/2016] [Accepted: 05/12/2016] [Indexed: 12/26/2022]
Abstract
BACKGROUND Oxidant stress is arguably a universal feature in toxicology. Research studies on the role of oxidant stress induced by xenobiotic exposures have typically relied on the identification of damaged biomolecules using a variety of conventional biochemical and molecular techniques. However, there is increasing evidence that low-level exposure to a variety of toxicants dysregulates cellular physiology by interfering with redox-dependent processes. SCOPE OF REVIEW The study of events involved in redox toxicology requires methodology capable of detecting transient modifications at relatively low signal strength. This article reviews the advantages of live-cell imaging for redox toxicology studies. MAJOR CONCLUSIONS Toxicological studies with xenobiotics of supra-physiological reactivity require careful consideration when using fluorogenic sensors in order to avoid potential artifacts and false negatives. Fortunately, experiments conducted for the purpose of validating the use of these sensors in toxicological applications often yield unexpected insights into the mechanisms through which xenobiotic exposure induces oxidant stress. GENERAL SIGNIFICANCE Live-cell imaging using a new generation of small molecule and genetically encoded fluorophores with excellent sensitivity and specificity affords unprecedented spatiotemporal resolution that is optimal for redox toxicology studies. This article is part of a Special Issue entitled Air Pollution, edited by Wenjun Ding, Andrew J. Ghio and Weidong Wu.
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Affiliation(s)
- Phillip A Wages
- Curriculum in Toxicology, University of North Carolina at Chapel Hill, NC, USA
| | - Wan-Yun Cheng
- Oak Ridge Institute for Science and Education, Oak Ridge, TN, USA; Integrated Systems Toxicology Division, National Health and Environmental Effects Research Laboratory, Research Triangle Park, NC, USA
| | - Eugene Gibbs-Flournoy
- Oak Ridge Institute for Science and Education, Oak Ridge, TN, USA; Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, Research Triangle Park, NC, USA
| | - James M Samet
- Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, Research Triangle Park, NC, USA.
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49
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Parham S, Chandren S, Wicaksono DHB, Bagherbaigi S, Lee SL, Yuan LS, Nur H. Textile/Al2O3–TiO2 nanocomposite as an antimicrobial and radical scavenger wound dressing. RSC Adv 2016. [DOI: 10.1039/c5ra20361a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Improving the antimicrobial activity and radical scavenging ability of a textile-based nanocomposite is the key issue in developing a good and flexible wound dressing.
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Affiliation(s)
- Shokoh Parham
- Centre for Sustainable Nanomaterials
- Ibnu Sina Institute for Scientific and Industrial Research
- Universiti Teknologi Malaysia
- 81310 UTM Skudai
- Malaysia
| | - Sheela Chandren
- Centre for Sustainable Nanomaterials
- Ibnu Sina Institute for Scientific and Industrial Research
- Universiti Teknologi Malaysia
- 81310 UTM Skudai
- Malaysia
| | - Dedy H. B. Wicaksono
- Medical Devices and Technology Research Group (MediTeg)
- Faculty of Biosciences and Medical Engineering
- Universiti Teknologi Malaysia
- 81310 UTM Skudai
- Malaysia
| | - Saeedeh Bagherbaigi
- Medical Devices and Technology Research Group (MediTeg)
- Faculty of Biosciences and Medical Engineering
- Universiti Teknologi Malaysia
- 81310 UTM Skudai
- Malaysia
| | - Siew Ling Lee
- Centre for Sustainable Nanomaterials
- Ibnu Sina Institute for Scientific and Industrial Research
- Universiti Teknologi Malaysia
- 81310 UTM Skudai
- Malaysia
| | - Lai Sin Yuan
- Centre for Sustainable Nanomaterials
- Ibnu Sina Institute for Scientific and Industrial Research
- Universiti Teknologi Malaysia
- 81310 UTM Skudai
- Malaysia
| | - Hadi Nur
- Centre for Sustainable Nanomaterials
- Ibnu Sina Institute for Scientific and Industrial Research
- Universiti Teknologi Malaysia
- 81310 UTM Skudai
- Malaysia
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Sultana ST, Atci E, Babauta JT, Mohamed Falghoush A, Snekvik KR, Call DR, Beyenal H. Electrochemical scaffold generates localized, low concentration of hydrogen peroxide that inhibits bacterial pathogens and biofilms. Sci Rep 2015; 5:14908. [PMID: 26464174 PMCID: PMC4604468 DOI: 10.1038/srep14908] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 09/11/2015] [Indexed: 11/29/2022] Open
Abstract
We hypothesized that low concentrations of H2O2 could be generated through the electrochemical conversion of oxygen by applying an electric potential to a conductive scaffold and produce a low, but constant, concentration of H2O2 that would be sufficient to destroy biofilms. To test our hypothesis we used a multidrug-resistant Acinetobacter baumannii strain, because this species is often implicated in difficult-to-treat biofilm infections. We used conductive carbon fabric as the scaffold material ("e-scaffold"). In vitro experiments demonstrated the production of a maximum constant concentration of ~25 μM H2O2 near the e-scaffold surface. An e-scaffold was overlaid onto an existing A. baumannii biofilm, and within 24 h there was a ~4-log reduction in viable bacteria with an ~80% decrease in biofilm surface coverage. A similar procedure was used to overlay an e-scaffold onto an existing A. baumannii biofilm that was grown on a porcine explant. After 24 h, there was a ~3-log reduction in viable bacteria from the infected porcine explants with no observable damage to the underlying mammalian tissue based on a viability assay and histology. This research establishes a novel foundation for an alternative antibiotic-free wound dressing to eliminate biofilms.
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Affiliation(s)
- Sujala T. Sultana
- School of Chemical Engineering & Bioengineering, Washington State University, Pullman 99163, WA
| | - Erhan Atci
- School of Chemical Engineering & Bioengineering, Washington State University, Pullman 99163, WA
| | - Jerome T. Babauta
- School of Chemical Engineering & Bioengineering, Washington State University, Pullman 99163, WA
| | - Azeza Mohamed Falghoush
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman 99163, WA
| | - Kevin R. Snekvik
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman 99163, WA
- Washington Animal Disease Diagnostic Laboratory, Washington State University, Pullman 99163, WA
| | - Douglas R. Call
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman 99163, WA
- Paul G. Allen School for Global Animal Health, Washington State University, Pullman 99163, WA
| | - Haluk Beyenal
- School of Chemical Engineering & Bioengineering, Washington State University, Pullman 99163, WA
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