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Ghanbari M, Salkovskiy Y, Carlson MA. The rat as an animal model in chronic wound research: An update. Life Sci 2024; 351:122783. [PMID: 38848945 DOI: 10.1016/j.lfs.2024.122783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 03/29/2024] [Accepted: 06/04/2024] [Indexed: 06/09/2024]
Abstract
The increasing global prevalence of chronic wounds underscores the growing importance of developing effective animal models for their study. This review offers a critical evaluation of the strengths and limitations of rat models frequently employed in chronic wound research and proposes potential improvements. It explores these models in the context of key comorbidities, including diabetes, venous and arterial insufficiency, pressure-induced blood flow obstruction, and infections. Additionally, the review examines important wound factors including age, sex, smoking, and the impact of anesthetic and analgesic drugs, acknowledging their substantial effects on research outcomes. A thorough understanding of these variables is crucial for refining animal models and can provide valuable insights for future research endeavors.
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Affiliation(s)
- Mahboubeh Ghanbari
- Department of Biomechanics, University of Nebraska at Omaha, Omaha, NE, USA.
| | - Yury Salkovskiy
- Department of Biomechanics, University of Nebraska at Omaha, Omaha, NE, USA.
| | - Mark A Carlson
- Department of Surgery, Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, NE, USA.
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2
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De La Cruz KF, Townsend EC, Alex Cheong JZ, Salamzade R, Liu A, Sandstrom S, Davila E, Huang L, Xu KH, Wu SY, Meudt JJ, Shanmuganayagam D, Gibson ALF, Kalan LR. The porcine skin microbiome exhibits broad fungal antagonism. Fungal Genet Biol 2024; 173:103898. [PMID: 38815692 DOI: 10.1016/j.fgb.2024.103898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 05/02/2024] [Accepted: 05/21/2024] [Indexed: 06/01/2024]
Abstract
The skin and its microbiome function to protect the host from pathogen colonization and environmental stressors. In this study, using the Wisconsin Miniature Swine™ model, we characterize the porcine skin fungal and bacterial microbiomes, identify bacterial isolates displaying antifungal activity, and use whole-genome sequencing to identify biosynthetic gene clusters encoding for secondary metabolites that may be responsible for the antagonistic effects on fungi. Through this comprehensive approach of paired microbiome sequencing with culturomics, we report the discovery of novel species of Corynebacterium and Rothia. Further, this study represents the first comprehensive evaluation of the porcine skin mycobiome and the evaluation of bacterial-fungal interactions on this surface. Several diverse bacterial isolates exhibit potent antifungal properties against opportunistic fungal pathogens in vitro. Genomic analysis of inhibitory species revealed a diverse repertoire of uncharacterized biosynthetic gene clusters suggesting a reservoir of novel chemical and biological diversity. Collectively, the porcine skin microbiome represents a potential unique source of novel antifungals.
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Affiliation(s)
- Karinda F De La Cruz
- Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - Elizabeth C Townsend
- Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States; Microbiology Doctoral Training Program, University of Wisconsin-Madison, Madison, WI, United States; Medical Scientist Training Program, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - J Z Alex Cheong
- Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States; Microbiology Doctoral Training Program, University of Wisconsin-Madison, Madison, WI, United States
| | - Rauf Salamzade
- Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States; Microbiology Doctoral Training Program, University of Wisconsin-Madison, Madison, WI, United States
| | - Aiping Liu
- Department of Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - Shelby Sandstrom
- Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - Evelin Davila
- Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States; National Summer Undergraduate Research Project, University of Arizona, Tucson, AZ, United States
| | - Lynda Huang
- Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - Kayla H Xu
- Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - Sherrie Y Wu
- Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - Jennifer J Meudt
- Department of Animal & Dairy Sciences, University of Wisconsin, Madison, WI, United States; Center for Biomedical Swine Research & Innovation, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - Dhanansayan Shanmuganayagam
- Department of Animal & Dairy Sciences, University of Wisconsin, Madison, WI, United States; Center for Biomedical Swine Research & Innovation, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - Angela L F Gibson
- Department of Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - Lindsay R Kalan
- Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States; Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario, Canada; M.G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, Ontario, Canada; David Braley Centre for Antibiotic Discovery, McMaster University, Hamilton, Ontario, Canada.
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3
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Boraldi F, Lofaro FD, Bonacorsi S, Mazzilli A, Garcia-Fernandez M, Quaglino D. The Role of Fibroblasts in Skin Homeostasis and Repair. Biomedicines 2024; 12:1586. [PMID: 39062158 PMCID: PMC11274439 DOI: 10.3390/biomedicines12071586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2024] [Revised: 07/08/2024] [Accepted: 07/15/2024] [Indexed: 07/28/2024] Open
Abstract
Fibroblasts are typical mesenchymal cells widely distributed throughout the human body where they (1) synthesise and maintain the extracellular matrix, ensuring the structural role of soft connective tissues; (2) secrete cytokines and growth factors; (3) communicate with each other and with other cell types, acting as signalling source for stem cell niches; and (4) are involved in tissue remodelling, wound healing, fibrosis, and cancer. This review focuses on the developmental heterogeneity of dermal fibroblasts, on their ability to sense changes in biomechanical properties of the surrounding extracellular matrix, and on their role in aging, in skin repair, in pathologic conditions and in tumour development. Moreover, we describe the use of fibroblasts in different models (e.g., in vivo animal models and in vitro systems from 2D to 6D cultures) for tissue bioengineering and the informative potential of high-throughput assays for the study of fibroblasts under different disease contexts for personalized healthcare and regenerative medicine applications.
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Affiliation(s)
- Federica Boraldi
- Department of Life Science, University of Modena and Reggio Emilia, 41125 Modena, Italy; (F.D.L.); (S.B.); (A.M.)
| | - Francesco Demetrio Lofaro
- Department of Life Science, University of Modena and Reggio Emilia, 41125 Modena, Italy; (F.D.L.); (S.B.); (A.M.)
| | - Susanna Bonacorsi
- Department of Life Science, University of Modena and Reggio Emilia, 41125 Modena, Italy; (F.D.L.); (S.B.); (A.M.)
| | - Alessia Mazzilli
- Department of Life Science, University of Modena and Reggio Emilia, 41125 Modena, Italy; (F.D.L.); (S.B.); (A.M.)
| | - Maria Garcia-Fernandez
- Department of Human Physiology, Institute of Biomedical Investigation (IBIMA), University of Málaga, 29010 Málaga, Spain;
| | - Daniela Quaglino
- Department of Life Science, University of Modena and Reggio Emilia, 41125 Modena, Italy; (F.D.L.); (S.B.); (A.M.)
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4
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Tuca AC, Bernardelli de Mattos I, Funk M, Markovic D, Winter R, Lemarchand T, Kniepeiss D, Spendel S, Hartmann B, Ottoman C, Kamolz LP. A Standardized Porcine Model for Partial-Thickness Wound Healing Studies: Design, Characterization, Model Validation, and Histological Insights. Int J Mol Sci 2024; 25:7658. [PMID: 39062901 PMCID: PMC11276889 DOI: 10.3390/ijms25147658] [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: 05/14/2024] [Revised: 07/02/2024] [Accepted: 07/10/2024] [Indexed: 07/28/2024] Open
Abstract
Wound healing is a complex process that is still not fully understood despite extensive research. To address this, we aimed to design and characterize a standardized porcine model for the evaluation of wound healing, dressings, cell therapies, and pharmaceutical agents. Using a standardized approach, we examined the wound healing process in 1.2 mm-deep dermatome wounds at defined positions in 11 female pigs. Unlike previous studies that have only described/analyzed selected punch biopsies, we performed and described histological analyses along the complete wound length using quantitative morphometric methods. All animals remained fully healthy following surgery and showed no signs of infection. Our histopathological evaluation using a predetermined grading score and quantitative manual morphometry demonstrated the impact of different tissue sampling methods, sampling sites, and residual dermis thickness on wound healing. Our study presents a reproducible model for wound healing evaluation and demonstrates the usefulness of porcine models for assessing dermal and epidermal wound healing. The use of histological analyses over the complete wound length provides advantages over previous studies, leading to the possibility of a deeper understanding of the wound healing process. This model could potentially facilitate future research on novel wound dressings and local wound healing therapies.
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Affiliation(s)
- Alexandru-Cristian Tuca
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria; (A.-C.T.); (R.W.); (S.S.); (L.-P.K.)
| | - Ives Bernardelli de Mattos
- Department of Tissue Engineering & Regenerative Medicine (TERM), University Hospital Würzburg, 97070 Würzburg, Germany
- EVOMEDIS GmbH, 8036 Graz, Austria;
| | | | - Danijel Markovic
- Core Facility Experimental Biomodels, Medical University of Graz, 8010 Graz, Austria;
| | - Raimund Winter
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria; (A.-C.T.); (R.W.); (S.S.); (L.-P.K.)
| | | | - Daniela Kniepeiss
- Division of General, Visceral, and Transplant Surgery, Department of Surgery, Medical University of Graz, 8010 Graz, Austria;
| | - Stephan Spendel
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria; (A.-C.T.); (R.W.); (S.S.); (L.-P.K.)
| | - Bernd Hartmann
- BG Klinikum Unfallkrankenhaus Berlin, 12683 Berlin, Germany; (B.H.); (C.O.)
| | - Christian Ottoman
- BG Klinikum Unfallkrankenhaus Berlin, 12683 Berlin, Germany; (B.H.); (C.O.)
| | - Lars-Peter Kamolz
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria; (A.-C.T.); (R.W.); (S.S.); (L.-P.K.)
- Joanneum Research Forschungsgesellschaft mbH, COREMED, 8010 Graz, Austria
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5
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Pignet AL, Schellnegger M, Hecker A, Kamolz LP, Kotzbeck P. Modeling Wound Chronicity In Vivo: The Translational Challenge to Capture the Complexity of Chronic Wounds. J Invest Dermatol 2024; 144:1454-1470. [PMID: 38483357 DOI: 10.1016/j.jid.2023.11.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 11/14/2023] [Accepted: 11/19/2023] [Indexed: 06/24/2024]
Abstract
In an aging society with common lifestyle-associated health issues such as obesity and diabetes, chronic wounds pose a frequent challenge that physicians face in everyday clinical practice. Therefore, nonhealing wounds have attracted much scientific attention. Several in vitro and in vivo models have been introduced to deepen our understanding of chronic wound pathogenesis and amplify therapeutic strategies. Understanding how wounds become chronic will provide insights to reverse or avoid chronicity. Although choosing a suitable model is of utmost importance to receive valuable outcomes, an ideal in vivo model capturing the complexity of chronic wounds is still missing and remains a translational challenge. This review discusses the most relevant mammalian models for wound healing studies and provides guidance on how to implement the hallmarks of chronic wounds. It highlights the benefits and pitfalls of established models and maps out future avenues for research.
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Affiliation(s)
- Anna-Lisa Pignet
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, Graz, Austria; COREMED - Centre for Regenerative and Precision Medicine, JOANNEUM RESEARCH, Graz, Austria; Research Unit for Tissue Repair and Reconstruction, Medical University of Graz, Graz, Austria
| | - Marlies Schellnegger
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, Graz, Austria; COREMED - Centre for Regenerative and Precision Medicine, JOANNEUM RESEARCH, Graz, Austria; Research Unit for Tissue Repair and Reconstruction, Medical University of Graz, Graz, Austria.
| | - Andrzej Hecker
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, Graz, Austria; COREMED - Centre for Regenerative and Precision Medicine, JOANNEUM RESEARCH, Graz, Austria; Research Unit for Tissue Repair and Reconstruction, Medical University of Graz, Graz, Austria
| | - Lars-Peter Kamolz
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, Graz, Austria; COREMED - Centre for Regenerative and Precision Medicine, JOANNEUM RESEARCH, Graz, Austria
| | - Petra Kotzbeck
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, Graz, Austria; COREMED - Centre for Regenerative and Precision Medicine, JOANNEUM RESEARCH, Graz, Austria; Research Unit for Tissue Repair and Reconstruction, Medical University of Graz, Graz, Austria
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6
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Greenspan LJ, Cisneros I, Weinstein BM. Dermal Dive: An Overview of Cutaneous Wounding Techniques in Zebrafish. J Invest Dermatol 2024; 144:1430-1439. [PMID: 38752940 PMCID: PMC11218931 DOI: 10.1016/j.jid.2024.04.003] [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: 12/11/2023] [Revised: 03/21/2024] [Accepted: 04/15/2024] [Indexed: 06/24/2024]
Abstract
Cutaneous wounds are common injuries that affect millions of people around the world. In vulnerable populations such as the elderly and those with diabetes, defects in wound healing can lead to the development of chronic open wounds. Although mammalian models are commonly used to study cutaneous wound healing, the challenges of in vivo imaging in mammals have hampered detailed observation of cell coordination and cell signaling during wound healing. The zebrafish is becoming increasingly popular for studying cutaneous wound healing owing to its genetic accessibility, suitability for experimental manipulation, and the ability to perform live, in vivo imaging with cellular or even subcellular resolution. In this paper, we review some of the techniques that have been developed for eliciting cutaneous wounds in the zebrafish, including an economical method we recently developed using a rotary tool that generates consistent and reproducible full-thickness wounds. Combined with the thousands of transgenic lines and experimental assays available in zebrafish, the ability to generate reproducible cutaneous wounds makes it possible to study key cellular and molecular events during wound healing using this powerful experimental model organism.
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Affiliation(s)
- Leah J Greenspan
- Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, USA
| | - Isabella Cisneros
- Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, USA
| | - Brant M Weinstein
- Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, USA.
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7
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Croteau D, Buckley M, Mantay M, Brannan C, Roy A, Barbaro B, Griffiths S. A Novel Dehydrated Human Umbilical Cord Particulate Medical Device: Matrix Characterization, Performance, and Biocompatibility for the Management of Acute and Chronic Wounds. Bioengineering (Basel) 2024; 11:588. [PMID: 38927824 PMCID: PMC11200885 DOI: 10.3390/bioengineering11060588] [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: 04/29/2024] [Revised: 05/28/2024] [Accepted: 06/04/2024] [Indexed: 06/28/2024] Open
Abstract
Chronic wounds present a significant socioeconomic burden forecasted to increase in prevalence and cost. Minimally manipulated human placental tissues have been increasingly employed and proven to be advantageous in the treatment of chronic wounds, showing improved clinical outcomes and cost-effectiveness. However, technological advances have been constrained by minimal manipulation and homologous use criteria. This study focuses on the characterization of a novel dehydrated human umbilical cord particulate (dHUCP) medical device, which offers a unique allogeneic technological advancement and the first human birth tissue device for wound management. Characterization analyses illustrated a complex extracellular matrix composition conserved in the dHUCP device compared to native umbilical cord, with abundant collagens and glycosaminoglycans imbibing an intricate porous scaffold. Dermal fibroblasts readily attached to the intact scaffold of the dHUCP device. Furthermore, the dHUCP device elicited a significant paracrine proliferative response in dermal fibroblasts, in contrast to fibrillar collagen, a prevalent wound device. Biocompatibility testing in a porcine full-thickness wound model showed resorption of the dHUCP device and normal granulation tissue maturation during healing. The dHUCP device is a promising advancement in wound management biomaterials, offering a unique combination of structural complexity adept for challenging wound topographies and a microenvironment supportive of tissue regeneration.
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Affiliation(s)
| | | | | | | | | | | | - Sarah Griffiths
- Research and Development, Stimlabs LLC, 1225 Northmeadow Parkway, Suite 104, Roswell, GA 30076, USA
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8
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Quizon MJ, Deppen JN, Barber GF, Kalelkar PP, Coronel MM, Levit RD, García AJ. VEGF-delivering PEG hydrogels promote vascularization in the porcine subcutaneous space. J Biomed Mater Res A 2024; 112:866-880. [PMID: 38189109 PMCID: PMC10984793 DOI: 10.1002/jbm.a.37666] [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: 11/16/2023] [Revised: 12/21/2023] [Accepted: 12/24/2023] [Indexed: 01/09/2024]
Abstract
For cell therapies, the subcutaneous space is an attractive transplant site due to its large surface area and accessibility for implantation, monitoring, biopsy, and retrieval. However, its poor vascularization has catalyzed research to induce blood vessel formation within the site to enhance cell revascularization and survival. Most studies focus on the subcutaneous space of rodents, which does not recapitulate important anatomical features and vascularization responses of humans. Herein, we evaluate biomaterial-driven vascularization in the porcine subcutaneous space. Additionally, we report the first use of cost-effective fluorescent microspheres to quantify perfusion in the porcine subcutaneous space. We investigate the vascularization-inducing efficacy of vascular endothelial growth factor (VEGF)-delivering synthetic hydrogels based on 4-arm poly(ethylene) glycol macromers with terminal maleimides (PEG-4MAL). We compare three groups: a non-degradable hydrogel with a VEGF-releasing PEG-4MAL gel coating (Core+VEGF gel); an uncoated, non-degradable hydrogel (Core-only); and naïve tissue. After 2 weeks, Core+VEGF gel has significantly higher tissue perfusion, blood vessel area, blood vessel density, and number of vessels compared to both Core-only and naïve tissue. Furthermore, healthy vital signs during surgery and post-procedure metrics demonstrate the safety of hydrogel delivery. We demonstrate that VEGF-delivering synthetic hydrogels induce robust vascularization and perfusion in the porcine subcutaneous space.
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Affiliation(s)
- Michelle J. Quizon
- Woodruff School of Mechanical Engineering and Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, 315 Ferst Dr. NW, Atlanta, GA 30332, USA
| | - Juline N. Deppen
- Division of Cardiology, Emory University School of Medicine, 1440 Clifton Rd, Atlanta, GA 30322, USA
| | - Graham F. Barber
- Woodruff School of Mechanical Engineering and Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, 315 Ferst Dr. NW, Atlanta, GA 30332, USA
| | - Pranav P. Kalelkar
- Woodruff School of Mechanical Engineering and Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, 315 Ferst Dr. NW, Atlanta, GA 30332, USA
| | - María M. Coronel
- Woodruff School of Mechanical Engineering and Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, 315 Ferst Dr. NW, Atlanta, GA 30332, USA
| | - Rebecca D. Levit
- Division of Cardiology, Emory University School of Medicine, 1440 Clifton Rd, Atlanta, GA 30322, USA
| | - Andrés J. García
- Woodruff School of Mechanical Engineering and Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, 315 Ferst Dr. NW, Atlanta, GA 30332, USA
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9
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Witt E, Leach AJ, Bi J, Hatfield S, Cotoia AT, McGovern MK, Cafi AB, Rhodes AC, Cook AN, Uaroon S, Parajuli B, Kim J, Feig V, Scheiflinger A, Nwosu I, Jimenez M, Coleman MC, Buchakjian MR, Bosch DE, Tift MS, Traverso G, Otterbein LE, Byrne JD. Modulation of diabetic wound healing using carbon monoxide gas-entrapping materials. DEVICE 2024; 2:100320. [PMID: 38911126 PMCID: PMC11192243 DOI: 10.1016/j.device.2024.100320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/25/2024]
Abstract
Diabetic wound healing is uniquely challenging to manage due to chronic inflammation and heightened microbial growth from elevated interstitial glucose. Carbon monoxide (CO), widely acknowledged as a toxic gas, is also known to provide unique therapeutic immune modulating effects. To facilitate delivery of CO, we have designed hyaluronic acid-based CO-gas-entrapping materials (CO-GEMs) for topical and prolonged gas delivery to the wound bed. We demonstrate that CO-GEMs promote the healing response in murine diabetic wound models (full-thickness wounds and pressure ulcers) compared to N2-GEMs and untreated controls.
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Affiliation(s)
- Emily Witt
- Department of Biomedical Engineering, University of Iowa, Iowa City, IA, 52242, USA
- Department of Radiation Oncology, University of Iowa, Iowa City, IA, 52242, USA
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, 52242, USA
| | - Alexander J Leach
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, 52242, USA
- Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA
| | - Jianling Bi
- Department of Biomedical Engineering, University of Iowa, Iowa City, IA, 52242, USA
- Department of Radiation Oncology, University of Iowa, Iowa City, IA, 52242, USA
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, 52242, USA
| | - Samual Hatfield
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, 52242, USA
- Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA
| | - Alicia T Cotoia
- Department of Biology and Marine Biology, University of North Carolina Wilmington, Wilmington, NC, 28403, USA
| | - Megan K McGovern
- Department of Biomedical Engineering, University of Iowa, Iowa City, IA, 52242, USA
- Department of Radiation Oncology, University of Iowa, Iowa City, IA, 52242, USA
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, 52242, USA
| | - Arielle B Cafi
- Department of Biomedical Engineering, University of Iowa, Iowa City, IA, 52242, USA
- Department of Radiation Oncology, University of Iowa, Iowa City, IA, 52242, USA
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, 52242, USA
| | - Ashley C Rhodes
- Department of Biomedical Engineering, University of Iowa, Iowa City, IA, 52242, USA
- Department of Radiation Oncology, University of Iowa, Iowa City, IA, 52242, USA
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, 52242, USA
| | - Austin N Cook
- Department of Biomedical Engineering, University of Iowa, Iowa City, IA, 52242, USA
- Department of Radiation Oncology, University of Iowa, Iowa City, IA, 52242, USA
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, 52242, USA
| | - Slyn Uaroon
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, 52242, USA
- Department of Otolaryngology, University of Iowa, Iowa City, IA, 52242, USA
| | - Bishal Parajuli
- Department of Pathology, University of Iowa, Iowa City, IA, 52242, USA
| | - Jinhee Kim
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, Ontario, ON M5S 1A8, Canada
- Division of Gastroenterology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, 02115, USA
| | - Vivian Feig
- Division of Gastroenterology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, 02115, USA
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Alexandra Scheiflinger
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, 02215, USA
| | - Ikenna Nwosu
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, 52242, USA
- Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA
| | - Miguel Jimenez
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, Ontario, ON M5S 1A8, Canada
- Division of Gastroenterology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, 02115, USA
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Mitchell C Coleman
- Free Radical and Radiation Biology Program, University of Iowa, Iowa City, IA, 52242, USA
| | - Marisa R Buchakjian
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, 52242, USA
- Department of Otolaryngology, University of Iowa, Iowa City, IA, 52242, USA
| | - Dustin E Bosch
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, 52242, USA
- Department of Pathology, University of Iowa, Iowa City, IA, 52242, USA
| | - Michael S Tift
- Department of Biology and Marine Biology, University of North Carolina Wilmington, Wilmington, NC, 28403, USA
| | - Giovanni Traverso
- Division of Gastroenterology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, 02115, USA
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Leo E Otterbein
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, 02215, USA
| | - James D Byrne
- Department of Biomedical Engineering, University of Iowa, Iowa City, IA, 52242, USA
- Department of Radiation Oncology, University of Iowa, Iowa City, IA, 52242, USA
- Holden Comprehensive Cancer Center, University of Iowa, Iowa City, IA, 52242, USA
- Free Radical and Radiation Biology Program, University of Iowa, Iowa City, IA, 52242, USA
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10
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Otake M, Imamura M, Enya S, Kangawa A, Shibata M, Ozaki K, Kimura K, Ono E, Aoki Y. Severe cardiac and skeletal manifestations in DMD-edited microminipigs: an advanced surrogate for Duchenne muscular dystrophy. Commun Biol 2024; 7:523. [PMID: 38702481 PMCID: PMC11068776 DOI: 10.1038/s42003-024-06222-5] [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: 11/12/2023] [Accepted: 04/19/2024] [Indexed: 05/06/2024] Open
Abstract
Duchenne muscular dystrophy (DMD) is an intractable X-linked muscular dystrophy caused by mutations in the DMD gene. While many animal models have been used to study the disease, translating findings to humans has been challenging. Microminipigs, with their pronounced physiological similarity to humans and notably compact size amongst pig models, could offer a more representative model for human diseases. Here, we accomplished precise DMD modification in microminipigs by co-injecting embryos with Cas9 protein and a single-guide RNA targeting exon 23 of DMD. The DMD-edited microminipigs exhibited pronounced clinical phenotypes, including perturbed locomotion and body-wide skeletal muscle weakness and atrophy, alongside augmented serum creatine kinase levels. Muscle weakness was observed as of one month of age, respiratory and cardiac dysfunctions emerged by the sixth month, and the maximum lifespan was 29.9 months. Histopathological evaluations confirmed dystrophin deficiency and pronounced dystrophic pathology in the skeletal and myocardial tissues, demonstrating that these animals are an unprecedented model for studying human DMD. The model stands as a distinct and crucial tool in biomedical research, offering deep understanding of disease progression and enhancing therapeutic assessments, with potential to influence forthcoming treatment approaches.
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Affiliation(s)
- Masayoshi Otake
- Swine and Poultry Research Center, Shizuoka Prefectural Research Institute of Animal Industry, Kikugawa, Shizuoka, 439-0037, Japan.
| | - Michihiro Imamura
- Department of Molecular Therapy, National Institute of Neuroscience, National Centre of Neurology and Psychiatry, Tokyo, 187-8502, Japan
| | - Satoko Enya
- Swine and Poultry Research Center, Shizuoka Prefectural Research Institute of Animal Industry, Kikugawa, Shizuoka, 439-0037, Japan
| | - Akihisa Kangawa
- Swine and Poultry Research Center, Shizuoka Prefectural Research Institute of Animal Industry, Kikugawa, Shizuoka, 439-0037, Japan
| | - Masatoshi Shibata
- Swine and Poultry Research Center, Shizuoka Prefectural Research Institute of Animal Industry, Kikugawa, Shizuoka, 439-0037, Japan
| | - Kinuyo Ozaki
- Department of Biomedicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
- Center of Biomedical Research, Research Center for Human Disease Modeling, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Koichi Kimura
- Departments of Laboratory Medicine/Cardiology, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Etsuro Ono
- Department of Biomedicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
- Center of Biomedical Research, Research Center for Human Disease Modeling, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Yoshitsugu Aoki
- Department of Molecular Therapy, National Institute of Neuroscience, National Centre of Neurology and Psychiatry, Tokyo, 187-8502, Japan.
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Bansal R, Torres M, Hunt M, Wang N, Chatzopoulou M, Manchanda M, Taddeo EP, Shu C, Shirihai OS, Bachar-Wikstrom E, Wikstrom JD. Role of the mitochondrial protein cyclophilin D in skin wound healing and collagen secretion. JCI Insight 2024; 9:e169213. [PMID: 38564292 PMCID: PMC11141914 DOI: 10.1172/jci.insight.169213] [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: 01/26/2023] [Accepted: 03/27/2024] [Indexed: 04/04/2024] Open
Abstract
Central for wound healing is the formation of granulation tissue, which largely consists of collagen and whose importance stretches past wound healing, including being implicated in both fibrosis and skin aging. Cyclophilin D (CyD) is a mitochondrial protein that regulates the permeability transition pore, known for its role in apoptosis and ischemia-reperfusion. To date, the role of CyD in human wound healing and collagen generation has been largely unexplored. Here, we show that CyD was upregulated in normal wounds and venous ulcers, likely adaptive as CyD inhibition impaired reepithelialization, granulation tissue formation, and wound closure in both human and pig models. Overexpression of CyD increased keratinocyte migration and fibroblast proliferation, while its inhibition reduced migration. Independent of wound healing, CyD inhibition in fibroblasts reduced collagen secretion and caused endoplasmic reticulum collagen accumulation, while its overexpression increased collagen secretion. This was confirmed in a Ppif-KO mouse model, which showed a reduction in skin collagen. Overall, this study revealed previously unreported roles of CyD in skin, with implications for wound healing and beyond.
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Affiliation(s)
- Ritu Bansal
- Dermatology and Venereology Division, Department of Medicine (Solna), Karolinska Institutet, Stockholm, Sweden
| | - Monica Torres
- Dermatology and Venereology Division, Department of Medicine (Solna), Karolinska Institutet, Stockholm, Sweden
- Dermato-Venereology Clinic, Karolinska University Hospital, Stockholm, Sweden
| | - Matthew Hunt
- Dermatology and Venereology Division, Department of Medicine (Solna), Karolinska Institutet, Stockholm, Sweden
| | - Nuoqi Wang
- Dermatology and Venereology Division, Department of Medicine (Solna), Karolinska Institutet, Stockholm, Sweden
| | - Margarita Chatzopoulou
- Dermatology and Venereology Division, Department of Medicine (Solna), Karolinska Institutet, Stockholm, Sweden
| | - Mansi Manchanda
- Dermatology and Venereology Division, Department of Medicine (Solna), Karolinska Institutet, Stockholm, Sweden
| | - Evan P. Taddeo
- Metabolism Theme
- Department of Molecular and Medical Pharmacology, and
- Department of Medicine, Division of Endocrinology, David Geffen School of Medicine, UCLA, Los Angeles, California, USA
| | - Cynthia Shu
- Metabolism Theme
- Department of Molecular and Medical Pharmacology, and
- Department of Medicine, Division of Endocrinology, David Geffen School of Medicine, UCLA, Los Angeles, California, USA
| | - Orian S. Shirihai
- Metabolism Theme
- Department of Molecular and Medical Pharmacology, and
- Department of Medicine, Division of Endocrinology, David Geffen School of Medicine, UCLA, Los Angeles, California, USA
| | - Etty Bachar-Wikstrom
- Dermatology and Venereology Division, Department of Medicine (Solna), Karolinska Institutet, Stockholm, Sweden
| | - Jakob D. Wikstrom
- Dermatology and Venereology Division, Department of Medicine (Solna), Karolinska Institutet, Stockholm, Sweden
- Dermato-Venereology Clinic, Karolinska University Hospital, Stockholm, Sweden
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12
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Sanjarnia P, Picchio ML, Polegre Solis AN, Schuhladen K, Fliss PM, Politakos N, Metterhausen L, Calderón M, Osorio-Blanco ER. Bringing innovative wound care polymer materials to the market: Challenges, developments, and new trends. Adv Drug Deliv Rev 2024; 207:115217. [PMID: 38423362 DOI: 10.1016/j.addr.2024.115217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 01/24/2024] [Accepted: 02/18/2024] [Indexed: 03/02/2024]
Abstract
The development of innovative products for treating acute and chronic wounds has become a significant topic in healthcare, resulting in numerous products and innovations over time. The growing number of patients with comorbidities and chronic diseases, which may significantly alter, delay, or inhibit normal wound healing, has introduced considerable new challenges into the wound management scenario. Researchers in academia have quickly identified promising solutions, and many advanced wound healing materials have recently been designed; however, their successful translation to the market remains highly complex and unlikely without the contribution of industry experts. This review article condenses the main aspects of wound healing applications that will serve as a practical guide for researchers working in academia and industry devoted to designing, evaluating, validating, and translating polymer wound care materials to the market. The article highlights the current challenges in wound management, describes the state-of-the-art products already on the market and trending polymer materials, describes the regulation pathways for approval, discusses current wound healing models, and offers a perspective on new technologies that could soon reach consumers. We envision that this comprehensive review will significantly contribute to highlighting the importance of networking and exchanges between academia and healthcare companies. Only through the joint of these two actors, where innovation, manufacturing, regulatory insights, and financial resources act in harmony, can wound care products be developed efficiently to reach patients quickly and affordably.
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Affiliation(s)
- Pegah Sanjarnia
- POLYMAT, Applied Chemistry Department, Faculty of Chemistry, University of the Basque Country UPV/EHU, Paseo Manuel de Lardizábal, 3, 20018 Donostia-San Sebastián, Spain
| | - Matías L Picchio
- POLYMAT, Applied Chemistry Department, Faculty of Chemistry, University of the Basque Country UPV/EHU, Paseo Manuel de Lardizábal, 3, 20018 Donostia-San Sebastián, Spain; Instituto de Desarrollo Tecnológico para la Industria Química (INTEC), CONICET, Güemes 3450, Santa Fe 3000, Argentina
| | - Agustin N Polegre Solis
- Beiersdorf AG, Research & Development Department, Beiersdorfstraße 1-9, 22529 Hamburg, Germany
| | - Katharina Schuhladen
- Beiersdorf AG, Research & Development Department, Beiersdorfstraße 1-9, 22529 Hamburg, Germany
| | - Patricia M Fliss
- Beiersdorf AG, Research & Development Department, Beiersdorfstraße 1-9, 22529 Hamburg, Germany
| | - Nikolaos Politakos
- POLYMAT, Applied Chemistry Department, Faculty of Chemistry, University of the Basque Country UPV/EHU, Paseo Manuel de Lardizábal, 3, 20018 Donostia-San Sebastián, Spain
| | - Lutz Metterhausen
- Beiersdorf AG, Research & Development Department, Beiersdorfstraße 1-9, 22529 Hamburg, Germany
| | - Marcelo Calderón
- POLYMAT, Applied Chemistry Department, Faculty of Chemistry, University of the Basque Country UPV/EHU, Paseo Manuel de Lardizábal, 3, 20018 Donostia-San Sebastián, Spain; IKERBASQUE, Basque Foundation for Science, Plaza Euskadi 5, 48009 Bilbao, Spain
| | - Ernesto R Osorio-Blanco
- Beiersdorf AG, Research & Development Department, Beiersdorfstraße 1-9, 22529 Hamburg, Germany.
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13
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Ninkovic N, Sparks HD, Ponjevic D, Muench G, Biernaskie JA, Krawetz RJ. Proteoglycan 4 (PRG4) treatment improves skin wound healing in a porcine model. FASEB J 2024; 38:e23547. [PMID: 38498368 DOI: 10.1096/fj.202301289rrr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 02/08/2024] [Accepted: 02/26/2024] [Indexed: 03/20/2024]
Abstract
Proteoglycan 4 (PRG4) is a boundary lubricant originally identified in articular cartilage and has been since shown to have immunomodulation and antifibrotic properties. Previously, we have demonstrated that recombinant human (rh)PRG4 treatment accelerates auricular cartilage injury closure through an inhibition of the fibrotic response, and promotion of tissue regeneration in mice. The purpose of the current study was to examine the effects of rhPRG4 treatment (vs. a DMSO carried control) on full-thickness skin wound healing in a preclinical porcine model. Our findings suggest that while rhPRG4 did not significantly accelerate nor impede full-thickness skin wound closure, it did improve repair quality by decreasing molecular markers of fibrosis and increasing re-vascularization. We also demonstrated that rhPRG4 treatment increased dermal adipose tissue during the healing process specifically by retaining adipocytes in the wound area but did not inhibit lipolysis. Overall, the results of the current study have demonstrated that rhPRG4 acts as antifibrotic agent and regulates dermal adipose tissue during the healing processes resulting in a tissue with a trajectory that more resembles the native skin vs. a fibrotic patch. This study provides strong rationale to examine if rhPRG4 can improve regeneration in human wounds.
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Affiliation(s)
- Nicoletta Ninkovic
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Alberta, Canada
- McCaig Institute for Bone & Joint Health, University of Calgary, Calgary, Alberta, Canada
| | - Holly D Sparks
- McCaig Institute for Bone & Joint Health, University of Calgary, Calgary, Alberta, Canada
- Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Dragana Ponjevic
- McCaig Institute for Bone & Joint Health, University of Calgary, Calgary, Alberta, Canada
- Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Greg Muench
- Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Jeff A Biernaskie
- Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
| | - Roman J Krawetz
- McCaig Institute for Bone & Joint Health, University of Calgary, Calgary, Alberta, Canada
- Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Biomedical Engineering, University of Calgary, Calgary, Alberta, Canada
- Department Cell Biology and Anatomy, University of Calgary, Calgary, Alberta, Canada
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14
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Elmore L, Minissale NJ, Israel L, Katz Z, Safran J, Barba A, Austin L, Schaer TP, Freeman TA. Evaluating the Healing Potential of J-Plasma Scalpel-Created Surgical Incisions in Porcine and Rat Models. Biomedicines 2024; 12:277. [PMID: 38397879 PMCID: PMC10886613 DOI: 10.3390/biomedicines12020277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 01/16/2024] [Accepted: 01/20/2024] [Indexed: 02/25/2024] Open
Abstract
Cold atmospheric plasma devices generate reactive oxygen and nitrogen species that can be anti-microbial but also promote cell migration, differentiation, and tissue wound healing. This report investigates the healing of surgical incisions created using cold plasma generated by the J-Plasma scalpel (Precise Open handpiece, Apyx Medical, Inc.) compared to a steel scalpel in in vivo porcine and rat models. The J-Plasma scalpel is currently FDA approved for the delivery of helium plasma to cut, coagulate, and ablate soft tissue during surgical procedures. To our knowledge, this device has not been studied in creating surgical incisions but only during deeper dissection and hemostasis. External macroscopic and histologic grading by blinded reviewers revealed no significant difference in wound healing appearance or physiology in incisions created using the plasma scalpel as compared with a steel blade scalpel. Incisions created with the plasma scalpel also had superior hemostasis and a reduction in tissue and blood carryover. Scanning electron microscopy (SEM) and histology showed collagen fibril fusion occurred as the plasma scalpel incised through the tissue, contributing to a sealing effect. In addition, when bacteria were injected into the dermis before incision, the plasma scalpel disrupted the bacterial membrane as visualized in SEM images. External macroscopic and histologic grading by blinded reviewers revealed no significant difference in wound healing appearance or physiology. Based on these results, we propose additional studies to clinically evaluate the use of cold plasma in applications requiring hemostasis or when an increased likelihood of subdermal pathogen leakage could cause surgical site infection (i.e., sites with increased hair follicles).
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Affiliation(s)
- Lilith Elmore
- Department of Orthopaedic Research, Thomas Jefferson University, Philadelphia, PA 19107, USA (J.S.)
| | | | - Lauren Israel
- Department of Orthopaedic Research, Thomas Jefferson University, Philadelphia, PA 19107, USA (J.S.)
| | - Zoe Katz
- Department of Orthopaedic Research, Thomas Jefferson University, Philadelphia, PA 19107, USA (J.S.)
| | - Jordan Safran
- Department of Orthopaedic Research, Thomas Jefferson University, Philadelphia, PA 19107, USA (J.S.)
| | - Adriana Barba
- Department of Clinical Studies, New Bolton Center, School of Veterinary Medicine, University of Pennsylvania, Kennett Square, PA 19348, USA (T.P.S.)
| | - Luke Austin
- Rothman Orthopaedic Institute, Philadelphia, PA 19107, USA
| | - Thomas P. Schaer
- Department of Clinical Studies, New Bolton Center, School of Veterinary Medicine, University of Pennsylvania, Kennett Square, PA 19348, USA (T.P.S.)
| | - Theresa A. Freeman
- Department of Orthopaedic Research, Thomas Jefferson University, Philadelphia, PA 19107, USA (J.S.)
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15
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Li Y, Shan X, Liang J, Cai Z. Establishment of a Model for Human Hypertrophic Scar Using Tissue Engineering Method. J Craniofac Surg 2024; 35:268-272. [PMID: 37602502 DOI: 10.1097/scs.0000000000009648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 06/15/2023] [Indexed: 08/22/2023] Open
Abstract
BACKGROUND Treatment of human hypertrophic scar (HS) is a challenge for plastic surgeons, whereas the clinical and experimental research has been limited due to the lack of an ideal model of human HS tissue. OBJECTIVE To establish a model of human HS using tissue engineering method, to improve the research for HS in the clinic and laboratory. METHODS Hypertrophic scar fibroblasts (HSFBs) were transferred to polylactic acid (PLA)/polyglycolic acid (PGA) scaffolds. Biocompatibility of HSFBs-PLA/PGA composites was evaluated using scanning electron microscopy. Composites of HSFBs-PLA/PGA were implanted in subcutaneous pockets in athymic mice after 4 weeks in vitro culture. A re-entry operation was performed to obtain the HS-like tissues after 12 weeks of in vivo culture. The histological stain, the expression of type I collagen, the proliferation ability, and vitality of HSFBs were compared between human HS tissue and HS-like tissue. RESULTS The structure of PLA/PGA scaffolds facilitates HSFBs adhesion and proliferation. The HSFBs-PLA/PGA composites were in vivo cultured for 12 weeks, and then HS-like tissues were harvested from nude athymic mice. There was no statistical significance in the expression of type I collagen, cell cycle, and cell proliferation between human HS tissue and HS-like tissue. CONCLUSION The authors successfully established a model of human HS using the tissue engineering method, which could provide HS-like tissue for research. And it also could provide enough HS-like tissues to help reduce experimental variability within groups. This model can be used to investigate in prevention and treatment of HS and further explore the mechanisms of HS.
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Affiliation(s)
- Yawei Li
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing
- Department of Oral & Maxillofacial Surgery and Oral Biomedical Engineering Laboratory Shanghai Stomatological Hospital Fudan University, Shanghai, China
| | - Xiaofeng Shan
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing
| | - Jie Liang
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing
| | - Zhigang Cai
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing
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Du Y, Wang J, Fan W, Huang R, Wang H, Liu G. Preclinical study of diabetic foot ulcers: From pathogenesis to vivo/vitro models and clinical therapeutic transformation. Int Wound J 2023; 20:4394-4409. [PMID: 37438679 PMCID: PMC10681512 DOI: 10.1111/iwj.14311] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 06/28/2023] [Indexed: 07/14/2023] Open
Abstract
Diabetic foot ulcer (DFU), a common intractable chronic complication of diabetes mellitus (DM), has a prevalence of up to 25%, with more than 17% of the affected patients at risk of amputation or even death. Vascular risk factors, including vascular stenosis or occlusion, dyslipidemia, impaired neurosensory and motor function, and skin infection caused by trauma, all increase the risk of DFU in patients with diabetes. Therefore, diabetic foot is not a single pathogenesis. Preclinical studies have contributed greatly to the pathogenesis determination and efficacy evaluation of DFU. Many therapeutic tools are currently being investigated using DFU animal models for effective clinical translation. However, preclinical animal models that completely mimic the pathogenesis of DFU remain unexplored. Therefore, in this review, the preparation methods and evaluation criteria of DFU animal models with three major pathological mechanisms: neuropathy, angiopathy and DFU infection were discussed in detail. And the advantages and disadvantages of various DFU animal models for clinical sign simulation. Furthermore, the current status of vitro models of DFU and some preclinical studies have been transformed into clinical treatment programs, such as medical dressings, growth factor therapy, 3D bioprinting and pre-vascularization, Traditional Chinese Medicine treatment. However, because of the complexity of the pathological mechanism of DFU, the clinical transformation of DFU model still faces many challenges. We need to further optimize the existing preclinical studies of DFU to provide an effective animal platform for the future study of pathophysiology and clinical treatment of DFU.
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Affiliation(s)
- Yuqing Du
- Department of Peripheral Vascular SurgeryInstitute of surgery of traditional Chinese Medicine, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghaiChina
| | - Jie Wang
- Department of Peripheral Vascular SurgeryInstitute of surgery of traditional Chinese Medicine, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghaiChina
- Endocrinology departmentShanghai Municipal Hospital of Traditional Chinese Medicine, Shanghai University of Traditional Chinese MedicineShanghaiChina
| | - Weijing Fan
- Department of Peripheral Vascular SurgeryInstitute of surgery of traditional Chinese Medicine, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghaiChina
| | - Renyan Huang
- Department of Peripheral Vascular SurgeryInstitute of surgery of traditional Chinese Medicine, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghaiChina
| | - Hongfei Wang
- Department of Peripheral Vascular SurgeryInstitute of surgery of traditional Chinese Medicine, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghaiChina
| | - Guobin Liu
- Department of Peripheral Vascular SurgeryInstitute of surgery of traditional Chinese Medicine, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghaiChina
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Ahmadpour F, Salim MM, Esmailinejad MR, Razei A, Talebi S, Rasouli HR. Comparison of the effects of human fetal umbilical cord-derived hyaluronic acid and fibroblast-derived exosomes on wound healing in rats. Burns 2023; 49:1983-1989. [PMID: 37357060 DOI: 10.1016/j.burns.2023.05.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 04/19/2023] [Accepted: 05/06/2023] [Indexed: 06/27/2023]
Abstract
INTRODUCTION Exosomes and hyaluronic acid influence tissue regeneration and may be used as an alternative to more conventional wound treatment methods. This study compared how well hyaluronic acid from the human umbilical cord and exosomes from fibroblast cells heal burn wounds in a preclinical model. METHODS Ninety-six male Westar rats were used and allocated into four groups: The treatment group received 10% hyaluronic acid (HA); the treatment group received 300 l of exosome solution (EX); the treatment group received phenytoin (PC); the negative control group received no treatment (NC). The wound healing process was evaluated after 3, 6, 9, and 12 days. Histopathological analysis was done on the skin biopsy taken from the wounds. Re-epithelialization, inflammatory cells (PMNs), lymphocytes (LYMs), granulation tissue, collagen maturation (fibrosis), and eschar formation parameters were assessed for histopathological evaluation. On a scale from 0 to 4, each parameter received a score. RESULTS Compared to the PC and NC groups, the median score for re-epithelialization was greater in the HA and EX groups (P < 0.05). At three days, PMN abundance distinguished the PC and NC groups from the HA and EX groups (P < 0.01). Compared to the PC and NC groups, the HA and EX groups had a lower median LYM score (P < 0.01). We found no statistical difference between the four groups for granulation tissue and fibrosis (P > 0.05). The EX group had a lower average score for eschar formation than the PC, NC, and HA groups (P < 0.01). The HA and EX groups demonstrated faster healing in the clinical and microscopic examinations than the NC and PC groups. CONCLUSION The results showed that hyaluronic acid and exosomes improved wound healing. Also, the study demonstrated that hyaluronic acid has better effects in the re-epithelization. The exosome was more effective than HA in eschar formation. Both compounds were more influential in the PMNs and LYMs parameters than other groups. The combination of both compounds should be assessed further to achieve better therapeutic effects on wound healing.
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Affiliation(s)
- Fathollah Ahmadpour
- Trauma Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | | | - Mohammad Reza Esmailinejad
- Molecular Biology Research Center, System Biology and Poising Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Ali Razei
- Trauma Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Samira Talebi
- National Institute of Genetic Engineering and Biotechnology, Tehran, Iran
| | - Hamid Reza Rasouli
- Trauma Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
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18
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Brunetti G, Patton D, Moore Z, Palomeque-Chavez JC, O'Brien FJ, Boyle CJ. Validation of a sub-epidermal moisture scanner for early detection of pressure ulcers in an ex vivo porcine model of localized oedema. J Tissue Viability 2023; 32:508-515. [PMID: 37442720 DOI: 10.1016/j.jtv.2023.06.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 06/17/2023] [Accepted: 06/21/2023] [Indexed: 07/15/2023]
Abstract
Pressure ulcers (PUs) remain a chronic health problem with severe impacts on healthcare systems. Early detection is crucial to providing effective interventions. However, detecting PUs currently relies on subjective tissue evaluations, such as visual skin assessment, precluding interventions prior to the development of visible tissue damage. There is an unmet need for solutions that can detect early tissue damage before visual and tactile signs occur. Assessments based on sub-epidermal moisture (SEM) measurements represent an opportunity for robust and objective early detection of PUs, preventing broken skin PUs in more high-risk patients at high-risk anatomical locations. While SEM assessment technology has been validated in computational, bench and tissue phantom models, validation in soft tissue was absent. In this study, we successfully validated the ability of a commercially available SEM assessment device to measure and detect sub-epidermal moisture changes in a novel ex vivo porcine soft tissue model of localised oedema. When controlled and incremental fluid volumes (Phosphate Buffer Solution) were injected into porcine soft tissues, statistically significant differences were found in SEM values between fluid-injected sites, representing an inflammatory oedematous condition, and healthy tissue control sites, as measured by the SEM device. The device provided reproducible readings by detecting localised oedema changes in soft tissues, reflecting the build-up of fluid as small as 1 ml into the underlying tissue. Spatial characterization experiments described the ability of the device technology to differentiate between healthy and oedematous tissue. Our findings validate the use of SEM assessment technology to measure and quantify localized oedema.
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Affiliation(s)
- G Brunetti
- Tissue Engineering Research Group, Department of Anatomy & Regenerative Medicine, Royal College of Surgeons in Ireland (RCSI), 123 St Stephen's Green, Dublin 2, Ireland.
| | - D Patton
- Skin Wounds and Trauma Research Centre, School of Nursing and Midwifery, Royal College of Surgeons in Ireland (RCSI), 123 St Stephen's Green, Dublin 2, Ireland
| | - Z Moore
- Skin Wounds and Trauma Research Centre, School of Nursing and Midwifery, Royal College of Surgeons in Ireland (RCSI), 123 St Stephen's Green, Dublin 2, Ireland
| | - J C Palomeque-Chavez
- Tissue Engineering Research Group, Department of Anatomy & Regenerative Medicine, Royal College of Surgeons in Ireland (RCSI), 123 St Stephen's Green, Dublin 2, Ireland
| | - F J O'Brien
- Tissue Engineering Research Group, Department of Anatomy & Regenerative Medicine, Royal College of Surgeons in Ireland (RCSI), 123 St Stephen's Green, Dublin 2, Ireland
| | - C J Boyle
- Tissue Engineering Research Group, Department of Anatomy & Regenerative Medicine, Royal College of Surgeons in Ireland (RCSI), 123 St Stephen's Green, Dublin 2, Ireland
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Laskin JD, Ozkuyumcu K, Zhou P, Croutch CR, Heck DE, Laskin DL, Joseph LB. Skin Models Used to Define Mechanisms of Action of Sulfur Mustard. Disaster Med Public Health Prep 2023; 17:e551. [PMID: 37849329 DOI: 10.1017/dmp.2023.177] [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] [Indexed: 10/19/2023]
Abstract
Sulfur mustard (SM) is a threat to both civilian and military populations. Human skin is highly sensitive to SM, causing delayed erythema, edema, and inflammatory cell infiltration, followed by the appearance of large fluid-filled blisters. Skin wound repair is prolonged following blistering, which can result in impaired barrier function. Key to understanding the action of SM in the skin is the development of animal models that have a pathophysiology comparable to humans such that quantitative assessments of therapeutic drugs efficacy can be assessed. Two animal models, hairless guinea pigs and swine, are preferred to evaluate dermal products because their skin is morphologically similar to human skin. In these animal models, SM induces degradation of epidermal and dermal tissues but does not induce overt blistering, only microblistering. Mechanisms of wound healing are distinct in these animal models. Whereas a guinea pig heals by contraction, swine skin, like humans, heals by re-epithelialization. Mice, rats, and rabbits are also used for SM mechanistic studies. However, healing is also mediated by contraction; moreover, only microblistering is observed. Improvements in animal models are essential for the development of therapeutics to mitigate toxicity resulting from dermal exposure to SM.
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Affiliation(s)
- Jeffrey D Laskin
- Department of Environmental and Occupational Health and Justice, Rutgers University School of Public Health, Piscataway, NJ, USA
| | - Kevin Ozkuyumcu
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Piscataway, NJ, USA
| | - Peihong Zhou
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Piscataway, NJ, USA
| | | | - Diane E Heck
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Piscataway, NJ, USA
| | - Debra L Laskin
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Piscataway, NJ, USA
| | - Laurie B Joseph
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Piscataway, NJ, USA
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20
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Hunt M, Torres M, Bachar-Wikström E, Wikström JD. Multifaceted roles of mitochondria in wound healing and chronic wound pathogenesis. Front Cell Dev Biol 2023; 11:1252318. [PMID: 37771375 PMCID: PMC10523588 DOI: 10.3389/fcell.2023.1252318] [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: 07/03/2023] [Accepted: 08/28/2023] [Indexed: 09/30/2023] Open
Abstract
Mitochondria are intracellular organelles that play a critical role in numerous cellular processes including the regulation of metabolism, cellular stress response, and cell fate. Mitochondria themselves are subject to well-orchestrated regulation in order to maintain organelle and cellular homeostasis. Wound healing is a multifactorial process that involves the stringent regulation of several cell types and cellular processes. In the event of dysregulated wound healing, hard-to-heal chronic wounds form and can place a significant burden on healthcare systems. Importantly, treatment options remain limited owing to the multifactorial nature of chronic wound pathogenesis. One area that has received more attention in recent years is the role of mitochondria in wound healing. With regards to this, current literature has demonstrated an important role for mitochondria in several areas of wound healing and chronic wound pathogenesis including metabolism, apoptosis, and redox signalling. Additionally, the influence of mitochondrial dynamics and mitophagy has also been investigated. However, few studies have utilised patient tissue when studying mitochondria in wound healing, instead using various animal models. In this review we dissect the current knowledge of the role of mitochondria in wound healing and discuss how future research can potentially aid in the progression of wound healing research.
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Affiliation(s)
- Matthew Hunt
- Dermatology and Venerology Division, Department of Medicine (Solna), Karolinska Institutet, Stockholm, Sweden
| | - Monica Torres
- Dermatology and Venerology Division, Department of Medicine (Solna), Karolinska Institutet, Stockholm, Sweden
- Dermato-Venereology Clinic, Karolinska University Hospital, Stockholm, Sweden
| | - Etty Bachar-Wikström
- Dermatology and Venerology Division, Department of Medicine (Solna), Karolinska Institutet, Stockholm, Sweden
| | - Jakob D. Wikström
- Dermatology and Venerology Division, Department of Medicine (Solna), Karolinska Institutet, Stockholm, Sweden
- Dermato-Venereology Clinic, Karolinska University Hospital, Stockholm, Sweden
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21
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Wang L, Piao Y, Guo F, Wei J, Chen Y, Dai X, Zhang X. Current progress of pig models for liver cancer research. Biomed Pharmacother 2023; 165:115256. [PMID: 37536038 DOI: 10.1016/j.biopha.2023.115256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 07/26/2023] [Accepted: 07/28/2023] [Indexed: 08/05/2023] Open
Abstract
Preclinical trials play critical roles in assessing the safety and efficiency of novel therapeutic strategies for human diseases including live cancer. However, most therapeutic strategies that were proved to be effective in preclinical cancer models failed in human clinical trials due to the lack of appropriate disease animal models. Therefore, it is of importance and urgent to develop a precise animal model for preclinical cancer research. Liver cancer is one of the most frequently diagnosed cancers with low 5-year survival rate. Recently, porcine attracted increasing attentions as animal model in biomedical research. Porcine liver cancer model may provide a promising platform for biomedical research due to their similarities to human being in body size, anatomical characteristics, physiology and pathophysiology. In this review, we comprehensively summarized and discussed the advantages and disadvantages, rationale, current status and progress of pig models for liver cancer research.
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Affiliation(s)
- Luyao Wang
- Key Laboratory of Organ Regeneration and Transplantation of Ministry of Education, First Hospital of Jilin University, Changchun, China; National-Local Joint Engineering Laboratory of Animal Models for Human Disease, First Hospital of Jilin University, Changchun, China
| | - Yuexian Piao
- Invasive Technology Nursing Platform, First Hospital of Jilin University, Changchun, China
| | - Fucheng Guo
- Key Laboratory of Organ Regeneration and Transplantation of Ministry of Education, First Hospital of Jilin University, Changchun, China; National-Local Joint Engineering Laboratory of Animal Models for Human Disease, First Hospital of Jilin University, Changchun, China
| | - Jiarui Wei
- Key Laboratory of Organ Regeneration and Transplantation of Ministry of Education, First Hospital of Jilin University, Changchun, China; National-Local Joint Engineering Laboratory of Animal Models for Human Disease, First Hospital of Jilin University, Changchun, China
| | - Yurong Chen
- Key Laboratory of Organ Regeneration and Transplantation of Ministry of Education, First Hospital of Jilin University, Changchun, China; National-Local Joint Engineering Laboratory of Animal Models for Human Disease, First Hospital of Jilin University, Changchun, China
| | - Xiangpeng Dai
- Key Laboratory of Organ Regeneration and Transplantation of Ministry of Education, First Hospital of Jilin University, Changchun, China; National-Local Joint Engineering Laboratory of Animal Models for Human Disease, First Hospital of Jilin University, Changchun, China.
| | - Xiaoling Zhang
- Key Laboratory of Organ Regeneration and Transplantation of Ministry of Education, First Hospital of Jilin University, Changchun, China; National-Local Joint Engineering Laboratory of Animal Models for Human Disease, First Hospital of Jilin University, Changchun, China.
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22
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Lee JH, Won YJ, Kim H, Choi M, Lee E, Ryoou B, Lee SG, Cho BS. Adipose Tissue-Derived Mesenchymal Stem Cell-Derived Exosomes Promote Wound Healing and Tissue Regeneration. Int J Mol Sci 2023; 24:10434. [PMID: 37445612 DOI: 10.3390/ijms241310434] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 06/09/2023] [Accepted: 06/14/2023] [Indexed: 07/15/2023] Open
Abstract
Wound healing is a complex process involving cell proliferation, migration, and extracellular matrix (ECM) remodeling. Extracellular vesicles (EVs) or exosomes derived from adipose tissue-derived stem cells (ASCs) are emerging as promising alternatives to cell therapy for advanced wound healing. Hyaluronic acid (HA), a major component of the skin ECM, is widely utilized in wound dressings and dermal fillers. This study aimed to investigate the effects of ASC-derived exosomes (ASC-EXOs) on human dermal fibroblasts (HDFs) and their potential combination with HA in in vivo wound healing and dermal filler models. In HDFs, ASC-EXOs increased cell proliferation and migration. ASC-EXOs also upregulated the expression of genes involved in cell proliferation and wound healing while stimulating collagen production in HDFs. In a porcine wound healing model, topical treatment with a combination of HA and ASC-EXOs led to higher wound closure rates compared to HA alone. Histological examination showed increased re-epithelialization and collagen type III deposition in wounds treated with the combination of HA and ASC-EXOs. In a mouse dermal filler model, tissues injected with the combination of HA and ASC-EXOs exhibited thicker tissue layers, increased vascularization, enhanced infiltration of myofibroblasts, and higher levels of collagen III and collagen fiber content compared to HA alone. These findings suggest that ASC-EXOs have beneficial effects on cell proliferation, migration, and gene expression related to wound healing, and they may accelerate wound closure and promote tissue regeneration. Furthermore, the combination of HA and ASC-EXOs may enhance wound healing and tissue remodeling, indicating its potential for both clinical and regenerative aesthetic applications in skin repair and regeneration.
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Affiliation(s)
- Jun Ho Lee
- ExoCoBio Exosome Institute (EEI), ExoCoBio Inc., STE 306, 19 Gasan digital 1-ro, Geumcheon-gu, Seoul 08594, Republic of Korea
| | - Yu Jin Won
- ExoCoBio Exosome Institute (EEI), ExoCoBio Inc., STE 306, 19 Gasan digital 1-ro, Geumcheon-gu, Seoul 08594, Republic of Korea
| | - Hail Kim
- Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea
- BioNanocomposite Research Center, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Minji Choi
- Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea
- Clinical Research Institute, Kyung Hee University Medical Center, Seoul 02447, Republic of Korea
| | - Esther Lee
- ExoCoBio Exosome Institute (EEI), ExoCoBio Inc., STE 306, 19 Gasan digital 1-ro, Geumcheon-gu, Seoul 08594, Republic of Korea
| | - Bumsik Ryoou
- ExoCoBio Exosome Institute (EEI), ExoCoBio Inc., STE 306, 19 Gasan digital 1-ro, Geumcheon-gu, Seoul 08594, Republic of Korea
| | - Seok-Geun Lee
- Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea
- BioNanocomposite Research Center, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Byong Seung Cho
- ExoCoBio Exosome Institute (EEI), ExoCoBio Inc., STE 306, 19 Gasan digital 1-ro, Geumcheon-gu, Seoul 08594, Republic of Korea
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23
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Baetz N, Labroo P, Ifediba M, Miller D, Stauffer K, Sieverts M, Nicodemus-Johnson J, Chan E, Robinson I, Miess J, Roth S, Irvin J, Laun J, Mundinger G, Granick MS, Milner S, Garrett C, Li WW, Swanson EW, Smith DJ, Sopko NA. Evaluation in a porcine wound model and long-term clinical assessment of an autologous heterogeneous skin construct used to close full-thickness wounds. Tissue Cell 2023; 83:102126. [PMID: 37295271 DOI: 10.1016/j.tice.2023.102126] [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: 02/07/2023] [Revised: 05/31/2023] [Accepted: 06/01/2023] [Indexed: 06/12/2023]
Abstract
Acute and chronic wounds involving deeper layers of the skin are often not adequately healed by dressings alone and require therapies such as skin grafting, skin substitutes, or growth factors. Here we report the development of an autologous heterogeneous skin construct (AHSC) that aids wound closure. AHSC is manufactured from a piece of healthy full-thickness skin. The manufacturing process creates multicellular segments, which contain endogenous skin cell populations present within hair follicles. These segments are physically optimized for engraftment within the wound bed. The ability of AHSC to facilitate closure of full thickness wounds of the skin was evaluated in a swine model and clinically in 4 patients with wounds of different etiologies. Transcriptional analysis demonstrated high concordance of gene expression between AHSC and native tissues for extracellular matrix and stem cell gene expression panels. Swine wounds demonstrated complete wound epithelialization and mature stable skin by 4 months, with hair follicle development in AHSC-treated wounds evident by 15 weeks. Biomechanical, histomorphological, and compositional analysis of the resultant swine and human skin wound biopsies demonstrated the presence of epidermal and dermal architecture with follicular and glandular structures that are similar to native skin. These data suggest that treatment with AHSC can facilitate wound closure.
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Affiliation(s)
- Nicholas Baetz
- Department of Research and Development, PolarityTE MD, Inc., Salt Lake City, UT, USA
| | - Pratima Labroo
- Department of Research and Development, PolarityTE MD, Inc., Salt Lake City, UT, USA
| | - Marytheresa Ifediba
- Department of Research and Development, PolarityTE MD, Inc., Salt Lake City, UT, USA
| | - Devin Miller
- Department of Research and Development, PolarityTE MD, Inc., Salt Lake City, UT, USA
| | - Kendall Stauffer
- Department of Research and Development, PolarityTE MD, Inc., Salt Lake City, UT, USA
| | - Michael Sieverts
- Department of Research and Development, PolarityTE MD, Inc., Salt Lake City, UT, USA
| | | | - Eric Chan
- Department of Research and Development, PolarityTE MD, Inc., Salt Lake City, UT, USA
| | - Ian Robinson
- Department of Research and Development, PolarityTE MD, Inc., Salt Lake City, UT, USA
| | - James Miess
- Department of Research and Development, PolarityTE MD, Inc., Salt Lake City, UT, USA
| | - Stephanie Roth
- Department of Research and Development, PolarityTE MD, Inc., Salt Lake City, UT, USA
| | - Jenny Irvin
- Department of Research and Development, PolarityTE MD, Inc., Salt Lake City, UT, USA
| | - Jake Laun
- Department of Plastic Surgery, University of South Florida, Tampa, FL, USA
| | - Gerhard Mundinger
- Department of Surgery, Louisiana State University School of Medicine, New Orleans, LA, USA
| | - Mark S Granick
- Department of Surgery, Rutgers New Jersey Medical School, Newark, NJ, USA
| | - Stephen Milner
- Department of Research and Development, PolarityTE MD, Inc., Salt Lake City, UT, USA
| | - Caroline Garrett
- Department of Research and Development, PolarityTE MD, Inc., Salt Lake City, UT, USA
| | | | - Edward W Swanson
- Department of Research and Development, PolarityTE MD, Inc., Salt Lake City, UT, USA
| | - David J Smith
- Department of Plastic Surgery, University of South Florida, Tampa, FL, USA
| | - Nikolai A Sopko
- Department of Research and Development, PolarityTE MD, Inc., Salt Lake City, UT, USA.
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24
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Flynn K, Mahmoud NN, Sharifi S, Gould LJ, Mahmoudi M. Chronic Wound Healing Models. ACS Pharmacol Transl Sci 2023; 6:783-801. [PMID: 37200810 PMCID: PMC10186367 DOI: 10.1021/acsptsci.3c00030] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Indexed: 05/20/2023]
Abstract
In this paper, we review and analyze the commonly available wound healing models reported in the literature and discuss their advantages and issues, considering their relevance and translational potential to humans. Our analysis includes different in vitro and in silico as well as in vivo models and experimental techniques. We further explore the new technologies in the study of wound healing to provide an all encompassing review of the most efficient ways to proceed with wound healing experiments. We revealed that there is not one model of wound healing that is superior and can give translatable results to human research. Rather, there are many different models that have specific uses for studying certain processes or stages of wound healing. Our analysis suggests that when performing an experiment to assess stages of wound healing or different therapies to enhance healing, one must consider not only the species that will be used but also the type of model and how this can best replicate the physiology or pathophysiology in humans.
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Affiliation(s)
- Kiley Flynn
- Department
of Radiology and Precision Health Program, Michigan State University, East Lansing, Michigan 48824-1312, United States
| | - Nouf N. Mahmoud
- Faculty
of Pharmacy, Al-Zaytoonah University of
Jordan, Amman 11733, Jordan
- Department
of Biomedical Sciences, College of Health Sciences, QU Health, Qatar University, Doha 2713, Qatar
| | - Shahriar Sharifi
- Department
of Radiology and Precision Health Program, Michigan State University, East Lansing, Michigan 48824-1312, United States
| | - Lisa J. Gould
- Department
of Surgery, South Shore Hospital, South Weymouth, Massachusetts 02190, United States
| | - Morteza Mahmoudi
- Department
of Radiology and Precision Health Program, Michigan State University, East Lansing, Michigan 48824-1312, United States
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25
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Negri LB, Mannaa Y, Korupolu S, Farinelli WA, Anderson RR, Gelfand JA. Vitamin K3 (Menadione) is a multifunctional microbicide acting as a photosensitizer and synergizing with blue light to kill drug-resistant bacteria in biofilms. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2023; 244:112720. [PMID: 37186990 DOI: 10.1016/j.jphotobiol.2023.112720] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 04/10/2023] [Accepted: 05/03/2023] [Indexed: 05/17/2023]
Abstract
Cutaneous bacterial wound infections typically involve gram-positive cocci such as Staphylococcus aureus (SA) and usually become biofilm infections. Bacteria in biofilms may be 100-1000-fold more resistant to an antibiotic than the clinical laboratory minimal inhibitory concentration (MIC) for that antibiotic, contributing to antimicrobial resistance (AMR). AMR is a growing global threat to humanity. One pathogen-antibiotic resistant combination, methicillin-resistant SA (MRSA) caused more deaths globally than any other such combination in a recent worldwide statistical review. Many wound infections are accessible to light. Antimicrobial phototherapy, and particularly antimicrobial blue light therapy (aBL) is an innovative non-antibiotic approach often overlooked as a possible alternative or adjunctive therapy to reduce antibiotic use. We therefore focused on aBL treatment of biofilm infections, especially MRSA, focusing on in vitro and ex vivo porcine skin models of bacterial biofilm infections. Since aBL is microbicidal through the generation of reactive oxygen species (ROS), we hypothesized that menadione (Vitamin K3), a multifunctional ROS generator, might enhance aBL. Our studies suggest that menadione can synergize with aBL to increase both ROS and microbicidal effects, acting as a photosensitizer as well as an ROS recycler in the treatment of biofilm infections. Vitamin K3/menadione has been given orally and intravenously worldwide to thousands of patients. We conclude that menadione/Vitamin K3 can be used as an adjunct to antimicrobial blue light therapy, increasing the effectiveness of this modality in the treatment of biofilm infections, thereby presenting a potential alternative to antibiotic therapy, to which biofilm infections are so resistant.
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Affiliation(s)
- Laisa Bonafim Negri
- Wellman Center for Photomedicine, Thier 2, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Dermatology, Harvard Medical School, Boston, MA, USA; Vaccine and Immunotherapy Center, Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Yara Mannaa
- Wellman Center for Photomedicine, Thier 2, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Dermatology, Harvard Medical School, Boston, MA, USA; Vaccine and Immunotherapy Center, Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Sandeep Korupolu
- Wellman Center for Photomedicine, Thier 2, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Dermatology, Harvard Medical School, Boston, MA, USA
| | - William A Farinelli
- Wellman Center for Photomedicine, Thier 2, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Dermatology, Harvard Medical School, Boston, MA, USA
| | - R Rox Anderson
- Wellman Center for Photomedicine, Thier 2, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Dermatology, Harvard Medical School, Boston, MA, USA
| | - Jeffrey A Gelfand
- Wellman Center for Photomedicine, Thier 2, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Dermatology, Harvard Medical School, Boston, MA, USA; Vaccine and Immunotherapy Center, Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA.
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26
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Kacvinská K, Pavliňáková V, Poláček P, Michlovská L, Blahnová VH, Filová E, Knoz M, Lipový B, Holoubek J, Faldyna M, Pavlovský Z, Vícenová M, Cvanová M, Jarkovský J, Vojtová L. Accelular nanofibrous bilayer scaffold intrapenetrated with polydopamine network and implemented into a full-thickness wound of a white-pig model affects inflammation and healing process. J Nanobiotechnology 2023; 21:80. [PMID: 36882867 PMCID: PMC9990222 DOI: 10.1186/s12951-023-01822-5] [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: 11/14/2022] [Accepted: 02/15/2023] [Indexed: 03/09/2023] Open
Abstract
Treatment of complete loss of skin thickness requires expensive cellular materials and limited skin grafts used as temporary coverage. This paper presents an acellular bilayer scaffold modified with polydopamine (PDA), which is designed to mimic a missing dermis and a basement membrane (BM). The alternate dermis is made from freeze-dried collagen and chitosan (Coll/Chit) or collagen and a calcium salt of oxidized cellulose (Coll/CaOC). Alternate BM is made from electrospun gelatin (Gel), polycaprolactone (PCL), and CaOC. Morphological and mechanical analyzes have shown that PDA significantly improved the elasticity and strength of collagen microfibrils, which favorably affected swelling capacity and porosity. PDA significantly supported and maintained metabolic activity, proliferation, and viability of the murine fibroblast cell lines. The in vivo experiment carried out in a domestic Large white pig model resulted in the expression of pro-inflammatory cytokines in the first 1-2 weeks, giving the idea that PDA and/or CaOC trigger the early stages of inflammation. Otherwise, in later stages, PDA caused a reduction in inflammation with the expression of the anti-inflammatory molecule IL10 and the transforming growth factor β (TGFβ1), which could support the formation of fibroblasts. Similarities in treatment with native porcine skin suggested that the bilayer can be used as an implant for full-thickness skin wounds and thus eliminate the use of skin grafts.
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Affiliation(s)
- Katarína Kacvinská
- CEITEC - Central European Institute of Technology, Brno University of Technology, Purkyňova 656/123, 612 00, Brno, Czech Republic
| | - Veronika Pavliňáková
- CEITEC - Central European Institute of Technology, Brno University of Technology, Purkyňova 656/123, 612 00, Brno, Czech Republic
| | - Petr Poláček
- CEITEC - Central European Institute of Technology, Brno University of Technology, Purkyňova 656/123, 612 00, Brno, Czech Republic
| | - Lenka Michlovská
- CEITEC - Central European Institute of Technology, Brno University of Technology, Purkyňova 656/123, 612 00, Brno, Czech Republic
| | - Veronika Hefka Blahnová
- Institute of Experimental Medicine of the Czech Academy of Sciences, Vídeňská142 20, 1083, Prague 4, Czech Republic
| | - Eva Filová
- Institute of Experimental Medicine of the Czech Academy of Sciences, Vídeňská142 20, 1083, Prague 4, Czech Republic
| | - Martin Knoz
- Department of Burns and Plastic Surgery, Faculty of Medicine, Institution Shared With University Hospital Brno, Masaryk University, Jihlavská, 20, 625 00, Brno, Czech Republic.,Department of Plastic and Aesthetic Surgery, Faculty of Medicine, St. Anne's University Hospital, Masaryk University, Pekařská, 664/53, 602 00, Brno, Czech Republic
| | - Břetislav Lipový
- CEITEC - Central European Institute of Technology, Brno University of Technology, Purkyňova 656/123, 612 00, Brno, Czech Republic.,Department of Burns and Plastic Surgery, Faculty of Medicine, Institution Shared With University Hospital Brno, Masaryk University, Jihlavská, 20, 625 00, Brno, Czech Republic
| | - Jakub Holoubek
- Department of Burns and Plastic Surgery, Faculty of Medicine, Institution Shared With University Hospital Brno, Masaryk University, Jihlavská, 20, 625 00, Brno, Czech Republic
| | - Martin Faldyna
- Veterinary Research Institute, Hudcova 296/70, 621 00, Brno, Czech Republic
| | - Zdeněk Pavlovský
- Institute of Pathology, Faculty of Medicine, University Hospital Brno, Masaryk University, Brno, 625 00, Czech Republic
| | - Monika Vícenová
- Veterinary Research Institute, Hudcova 296/70, 621 00, Brno, Czech Republic
| | - Michaela Cvanová
- Institute of Biostatistics and Analyses, Faculty of Medicine, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Jiří Jarkovský
- Institute of Biostatistics and Analyses, Faculty of Medicine, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Lucy Vojtová
- CEITEC - Central European Institute of Technology, Brno University of Technology, Purkyňova 656/123, 612 00, Brno, Czech Republic.
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27
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Brash DE, Goncalves LCP. Chemiexcitation: Mammalian Photochemistry in the Dark †. Photochem Photobiol 2023; 99:251-276. [PMID: 36681894 PMCID: PMC10065968 DOI: 10.1111/php.13781] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 01/18/2023] [Indexed: 01/23/2023]
Abstract
Light is one way to excite an electron in biology. Another is chemiexcitation, birthing a reaction product in an electronically excited state rather than exciting from the ground state. Chemiexcited molecules, as in bioluminescence, can release more energy than ATP. Excited states also allow bond rearrangements forbidden in ground states. Molecules with low-lying unoccupied orbitals, abundant in biology, are particularly susceptible. In mammals, chemiexcitation was discovered to transfer energy from excited melanin, neurotransmitters, or hormones to DNA, creating the lethal and carcinogenic cyclobutane pyrimidine dimer. That process was initiated by nitric oxide and superoxide, radicals triggered by ultraviolet light or inflammation. Several poorly understood chronic diseases share two properties: inflammation generates those radicals across the tissue, and cells that die are those containing melanin or neuromelanin. Chemiexcitation may therefore be a pathogenic event in noise- and drug-induced deafness, Parkinson's disease, and Alzheimer's; it may prevent macular degeneration early in life but turn pathogenic later. Beneficial evolutionary selection for excitable biomolecules may thus have conferred an Achilles heel. This review of recent findings on chemiexcitation in mammalian cells also describes the underlying physics, biochemistry, and potential pathogenesis, with the goal of making this interdisciplinary phenomenon accessible to researchers within each field.
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Affiliation(s)
- Douglas E. Brash
- Department of Therapeutic Radiology, Yale School of Medicine, New Haven, CT 06520-8040, USA
- Yale Cancer Center, Yale School of Medicine, New Haven, CT 06520-8028, USA
| | - Leticia C. P. Goncalves
- Department of Therapeutic Radiology, Yale School of Medicine, New Haven, CT 06520-8040, USA
- Institut de Chimie de Nice CNRS UMR7272, Université Côte d’Azur, 28 Avenue Valrose 06108 Nice, France
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28
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Neves LMG, Wilgus TA, Bayat A. In Vitro, Ex Vivo, and In Vivo Approaches for Investigation of Skin Scarring: Human and Animal Models. Adv Wound Care (New Rochelle) 2023; 12:97-116. [PMID: 34915768 DOI: 10.1089/wound.2021.0139] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Significance: The cutaneous repair process naturally results in different types of scarring that are classified as normal or pathological. Affected individuals are often affected from an esthetic, physical (functional), and psychosocial perspective. The distinct nature of scarring in humans, particularly the formation of pathological scars, makes the study of skin scarring a challenge for researchers in this area. Several established experimental models exist for studying scar formation. However, the increasing development and validation of newly emerging models have made it possible to carry out studies focused on different variables that influence this unique process. Recent Advances: Experimental models such as in vitro, ex vivo, and in vivo models have obtained different degrees of success in the reproduction of the scar formation in its native milieu and true environment. These models also differ in their ability to elucidate the molecular, cellular, and structural mechanisms involved in scarring, as well as for testing new agents and approaches for therapies. The models reviewed here, including cells derived from human skin and in vivo animal models, have contributed to the advancement of skin scarring research. Critical Issues and Future Directions: The absence of experimental models that faithfully reproduce the typical characteristics of the different types of human skin scars makes the improvement of validated models and the establishment of new ones a critical unmet need. The fields of wound healing research combined with tissue engineering have offered newer alternatives for experimental studies with the potential to provide clinically useful knowledge about scar formation.
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Affiliation(s)
- Lia M G Neves
- Plastic & Reconstructive Surgery Research, Centre for Dermatology Research, Wound Healing Theme, NIHR Manchester Biomedical Research Centre, University of Manchester, Manchester, England, United Kingdom
| | - Traci A Wilgus
- Department of Pathology, Ohio State University, Columbus, Ohio, USA
| | - Ardeshir Bayat
- Plastic & Reconstructive Surgery Research, Centre for Dermatology Research, Wound Healing Theme, NIHR Manchester Biomedical Research Centre, University of Manchester, Manchester, England, United Kingdom.,Medical Research Council (MRC) Wound Healing Unit, Hair and Skin Research Laboratory, Division of Dermatology, Department of Medicine, Groote Schuur Hospital, University of Cape Town, Cape Town, South Africa
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Heidari F, Yari A, Teimourian S, Joulai Veijouye S, Nobakht M. Effects of Hair Follicle Stem Cells Coupled With Polycaprolactone Scaffold on Cutaneous Wound Healing in Diabetic Male Rats. J Surg Res 2023; 281:200-213. [PMID: 36191376 DOI: 10.1016/j.jss.2022.08.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 07/19/2022] [Accepted: 08/16/2022] [Indexed: 01/31/2023]
Abstract
INTRODUCTION Chronic wounds are debilitating complications of diabetes mellitus. The present study was conducted to investigate the effect of the hair follicle stem cells (HFSCs) by polycaprolactone scaffold on the healing of incisional cutaneous wounds on streptozotocin-induced diabetic male rats. METHODS The wound model was obtained by a biopsy punch of the skin of the animals' back. The animals were randomly divided into five groups as follows: (1) Sham (nondiabetic, not treated), (2) Control (diabetic, not treated), (3) Scaffold (diabetic, treated with polycaprolactone nanofiber scaffold), (4) HFSCs (diabetic, treated with HFSCs), and (5) Scaffold + HFSCs (diabetic, treated with combination of Scaffold and HFSCs). The wounds were photographed in the course of the treatment and their healing rate was assessed. The samples were collected from the wound sites 7, 14, and 28 d after their development. Angiogenesis was surveyed by examining messenger RNA expression and the protein synthesis levels of vascular endothelial growth factor receptor 2 (VEGFR2) and platelet/endothelial cell adhesion molecule-1/cluster of differentiation 31. The histological changes were investigated using hematoxylin and eosin and Masson's trichrome staining. Furthermore, the wound breaking strength was measured on the 28th day by tensiometry. RESULTS The application of the VEGFR2 as a substrate promotes the expression of CD31 in HFSCs and Scaffold + HFSCs groups compared to controls (P < 0.0001). HFSCs and scaffold also rescue the diabetes-induced dysfunction as assessed based on the parameters, such as viability, proliferation, colony formation, cellular adhesion, and chemotactic migration. HFSCs augment the levels of VEGFR2 and promote the restoration of the wound healing in diabetic groups. Furthermore, the maximum biomechanical stress significantly increased in the experimental diabetic groups (Scaffold: 1.38 ± 0.09, HFSCs: 2.13 ± 0.8, Scaffold + HFSCs: 2.38 ± 0.11) compared to the diabetes control group (1.16 ± 0.12). Using of HFSCs and scaffold on diabetic wounds leads to an accelerated wound closure, notably. CONCLUSIONS Thus, the current data showed that HFSCs and scaffold form excellent biomaterial in the treatment of diabetic wounds.
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Affiliation(s)
- Fatemeh Heidari
- Department of Anatomy, School of Medicine, Qom University of Medical Sciences, Qom, Iran
| | - Abazar Yari
- Department of Anatomy, School of Medicine, Alborz University of Medical Sciences, Karaj, Iran; Dietary Supplements and Probiotics Research Center, Alborz University of Medical Sciences, Karaj, Iran
| | - Shahram Teimourian
- Department of Cell and Molecular Biology, Iran University of Medical Sciences, Tehran, Iran
| | - Sanaz Joulai Veijouye
- Department of Anatomy, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Maliheh Nobakht
- Department of Anatomy, School of Medicine, Iran University of Medical Sciences, Tehran, Iran; Physiology Research Center, Iran University of Medical Sciences, Tehran, Iran; Anti-Microbial Resistance Research Center, Iran University of Medical Sciences, Tehran, Iran.
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Saeed S, Martins-Green M. Animal models for the study of acute cutaneous wound healing. Wound Repair Regen 2023; 31:6-16. [PMID: 36153666 DOI: 10.1111/wrr.13051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 08/29/2022] [Accepted: 09/12/2022] [Indexed: 01/25/2023]
Abstract
The process of wound healing is critical to maintaining homeostasis after injury. Although a considerable amount has been learned about this complex process, much remains unknown. Whereas, studies with human volunteers are ideal given the unique nature of the human skin anatomy and immune system, the lack of such clinical access has made animal models prime candidates for use in preclinical studies. This review aims to discuss the strengths and limitations of the commonly used mammalian species in wound healing studies: murine, rabbit and porcine. Thereafter, a survey of models of various acute wounds such as cutaneous, ear, and implant are presented and representative studies that use them are described. This review is intended to acquaint readers with the vast spectrum of models available, each of which has a distinct utility. At the same time, it highlights the importance of utilising clinical samples to complement investigations conducted in animal models. Through this strategy, it is hoped that forthcoming research may be more reflective of the acute wound healing process as it occurs in humans.
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Affiliation(s)
- Shayan Saeed
- Department of Molecular, Cell, and Systems Biology, University of California, Riverside, Riverside, California, USA
| | - Manuela Martins-Green
- Department of Molecular, Cell, and Systems Biology, University of California, Riverside, Riverside, California, USA
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31
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From Basic Science to Clinical Perfection: What Defines the Orthopedic Biocompatible Implant? SURGERIES 2022. [DOI: 10.3390/surgeries4010001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The general improvement in life expectancy and standard of living makes it easier for patients to get access to routine medical exams and is anticipated to increase the prevalence of several degenerative joint illnesses. In addition, it is anticipated that their incidence will increase both nationally and internationally, which will raise the demand for novel and long-lasting implantable devices in the field of orthopedics. The current review’s goals are to define what constitutes a biocompatible orthopedic implant in terms of in vitro biocompatibility testing and to clarify important concepts and definitions that are already in use. The demand for materials and implants made of various tissues is now increasing, and the ongoing advancement of in vitro cell culture studies is a reliable practical tool for examining the biocompatibility of potential implantable materials. In vitro biocompatibility research has been reduced and, in most cases, diminished to laboratory studies that no longer or drastically reduce animal sacrifice as a response to the well-known three “Rs” (“reduction”, “refinement”, and “replacement”) introduced to literature by English academics in the 1960s. As technology advances at an astounding rate, a new generation of gene-activating biomaterials tailored for specific people and disease conditions might emerge in the near future.
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Wareham-Mathiassen S, Pinto Glenting V, Bay L, Allesen-Holm M, Bengtsson H, Bjarnsholt T. Characterization of pig skin microbiome and appraisal as an in vivo subcutaneous injection model. Lab Anim 2022:236772221136173. [DOI: 10.1177/00236772221136173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Pig skin is commonly used in the medical industry as an injection model due to its compelling physiological affinity to human skin. However, the pig neck skin microflora remains largely uncharacterized, which may have undesirable implications for the translatability of results to humans. This study aimed to characterize pig neck skin microbiome with direct comparison with human skin microflora at emblematic injection sites to appraise its suitability as an injection model. Ten minipigs were sampled with tape strips and swabs and analysed by matrix-assisted laser desorption/ionization-time of flight mass spectrometry and 16S/ITS high throughput sequencing and confocal laser scanning microscopy. Results were directly compared with previous investigations of human injection sites. Pig skin was dominated by phyla 94.8% Firmicutes, 3% Proteobacteria, and 2.2% Actinobacteria. Staphylococcus spp. prevailed (44.4%) at the genus level with S. capitis and S. chromogenes present in all samples. Pig skin revealed populations in the 104 colony-forming units (CFU)/cm2 range with 3% identified as Gram-negative and increased alpha diversity (compared with 102 CFU/cm2 and 10% in humans). While notable taxonomical differences on species levels were seen, pig skin encompassed 97.1% of genera found in human samples. The increased population and variation found support the pig neck as an imperfect but fidelitous subcutaneous injection model that can adequately challenge devices from a microbial standpoint.
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Affiliation(s)
- Sofia Wareham-Mathiassen
- Department of Immunology and Microbiology, Copenhagen University, Denmark
- Department of Front-End Innovation, Devices & Delivery Solutions, Novo Nordisk A/S, Bagsværd, Denmark
| | - Vera Pinto Glenting
- Department of Microbiology, Devices & Delivery Solutions, Novo Nordisk A/S, Bagsværd, Denmark
| | - Lene Bay
- Department of Immunology and Microbiology, Copenhagen University, Denmark
| | - Marie Allesen-Holm
- Strategy & Project and Portfolio Management, Chr. Hansen, Hørsholm, Denmark
| | - Henrik Bengtsson
- Department of Scientific Modelling, Devices & Delivery Solutions, Novo Nordisk A/S, Bagsværd, Denmark
| | - Thomas Bjarnsholt
- Department of Immunology and Microbiology, Copenhagen University, Denmark
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Alamneh YA, Antonic V, Garry B, Pucci MJ, Abu-Taleb R, Shearer JP, Demons ST, Getnet D, Swierczewski BE, Lister T, Zurawski DV. Minocycline and the SPR741 Adjuvant Are an Efficacious Antibacterial Combination for Acinetobacter baumannii Infections. Antibiotics (Basel) 2022; 11:antibiotics11091251. [PMID: 36140032 PMCID: PMC9495173 DOI: 10.3390/antibiotics11091251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 09/01/2022] [Accepted: 09/08/2022] [Indexed: 11/16/2022] Open
Abstract
Antibiotic resistance, when it comes to bacterial infections, is not a problem that is going to disappear anytime soon. With the lack of larger investment in novel antibiotic research and the ever-growing increase of resistant isolates amongst the ESKAPEE pathogens (Enterobacter cloacae, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, Enterococcus sp., and Escherichia coli), it is inevitable that more and more infections caused by extensively drug-resistant (XDR) and pandrug-resistant (PDR) strains will arise. One strategy to counteract the growing threat is to use antibiotic adjuvants, a drug class that on its own lacks significant antibiotic activity, but when mixed with another antibiotic, can potentiate increased killing of bacteria. Antibiotic adjuvants have various mechanisms of action, but polymyxins and polymyxin-like molecules can disrupt the Gram-negative outer membrane and allow other drugs better penetration into the bacterial periplasm and cytoplasm. Previously, we showed that SPR741 had this adjuvant effect with regard to rifampin; however, rifampin is often not used clinically because of easily acquired resistance. To find additional, appropriate clinical partners for SPR741 with respect to pulmonary and wound infections, we investigated tetracyclines and found a previously undocumented synergy with minocycline in vitro and in vivo in murine models of infection.
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Affiliation(s)
- Yonas A. Alamneh
- Wound Infections Department, Bacterial Diseases Branch, Center for Infectious Diseases Research, Walter Reed Army Institute of Research, Silver Spring, MD 20910, USA
| | - Vlado Antonic
- Wound Infections Department, Bacterial Diseases Branch, Center for Infectious Diseases Research, Walter Reed Army Institute of Research, Silver Spring, MD 20910, USA
| | - Brittany Garry
- Wound Infections Department, Bacterial Diseases Branch, Center for Infectious Diseases Research, Walter Reed Army Institute of Research, Silver Spring, MD 20910, USA
| | | | - Rania Abu-Taleb
- Wound Infections Department, Bacterial Diseases Branch, Center for Infectious Diseases Research, Walter Reed Army Institute of Research, Silver Spring, MD 20910, USA
| | - Jonathan P. Shearer
- Wound Infections Department, Bacterial Diseases Branch, Center for Infectious Diseases Research, Walter Reed Army Institute of Research, Silver Spring, MD 20910, USA
| | - Samandra T. Demons
- Wound Infections Department, Bacterial Diseases Branch, Center for Infectious Diseases Research, Walter Reed Army Institute of Research, Silver Spring, MD 20910, USA
| | - Derese Getnet
- Wound Infections Department, Bacterial Diseases Branch, Center for Infectious Diseases Research, Walter Reed Army Institute of Research, Silver Spring, MD 20910, USA
| | - Brett E. Swierczewski
- Wound Infections Department, Bacterial Diseases Branch, Center for Infectious Diseases Research, Walter Reed Army Institute of Research, Silver Spring, MD 20910, USA
| | - Troy Lister
- Spero Therapeutics, Inc., Cambridge, MA 02139, USA
| | - Daniel V. Zurawski
- Wound Infections Department, Bacterial Diseases Branch, Center for Infectious Diseases Research, Walter Reed Army Institute of Research, Silver Spring, MD 20910, USA
- Correspondence: ; Tel.: +1-301-319-3110; Fax: +1-301-319-9801
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Lee JY, Suh HN, Choi KY, Song CW, Hwang JH. Regenerative and anti‐inflammatory effect of a novel bentonite complex on burn wounds. Vet Med Sci 2022; 8:2422-2433. [DOI: 10.1002/vms3.908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Affiliation(s)
- Ju Young Lee
- Animal Model Research Group Korea Institute of Toxicology (KIT) Jeongeup Republic of Korea
| | - Han Na Suh
- Animal Model Research Group Korea Institute of Toxicology (KIT) Jeongeup Republic of Korea
| | - Kwan Young Choi
- C&L Biotech Co. Ltd. Seoul Republic of Korea
- Quantum Bionics Anyang Republic of Korea
| | - Chang Woo Song
- Animal Model Research Group Korea Institute of Toxicology (KIT) Jeongeup Republic of Korea
- Division of Human and Environmental Toxicology University of Science & Technology (UST) Daejeon Republic of Korea
| | - Jeong Ho Hwang
- Animal Model Research Group Korea Institute of Toxicology (KIT) Jeongeup Republic of Korea
- Division of Human and Environmental Toxicology University of Science & Technology (UST) Daejeon Republic of Korea
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Abstract
Wound healing is an aspect of normal physiology that we all take for granted until it goes wrong, such as, for example, the scarring that results from a severe burn, or those patients who suffer from debilitating chronic wounds that fail to heal. Ever since wound repair research began as a discipline, clinicians and basic scientists have collaborated to try and understand the cell and molecular mechanisms that underpin healthy repair in the hope that this will reveal clues for the therapeutic treatment of pathological healing. In recent decades mathematicians and physicists have begun to join in with this important challenge. Here we describe examples of how mathematical modeling married to biological experimentation has provided insights that biology alone could not fathom. To date, these studies have largely focused on wound re-epithelialization and inflammation, but we also discuss other components of wound healing that might be ripe for similar interdisciplinary approaches.
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Affiliation(s)
- Jake Turley
- School of Mathematics, Fry Building, University of Bristol, Bristol BS8 1UG, UK
- School of Biochemistry, University of Bristol, Bristol BS8 1TD, UK
- Corresponding author
| | - Isaac V. Chenchiah
- School of Mathematics, Fry Building, University of Bristol, Bristol BS8 1UG, UK
| | | | - Helen Weavers
- School of Biochemistry, University of Bristol, Bristol BS8 1TD, UK
| | - Paul Martin
- School of Biochemistry, University of Bristol, Bristol BS8 1TD, UK
- Corresponding author
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Human Umbilical Cord Lining-Derived Epithelial Cells: A Potential Source of Non-Native Epithelial Cells That Accelerate Healing in a Porcine Cutaneous Wound Model. Int J Mol Sci 2022; 23:ijms23168918. [PMID: 36012184 PMCID: PMC9408523 DOI: 10.3390/ijms23168918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 08/03/2022] [Accepted: 08/07/2022] [Indexed: 11/21/2022] Open
Abstract
Human umbilical cord lining epithelial cells [CLECs) are naïve in nature and can be ethically recovered from cords that are routinely discarded. The success of using oral mucosal epithelial cells for cornea defects hints at the feasibility of treating cutaneous wounds using non-native CLECs. Herein, we characterized CLECs using flow cytometry (FC) and skin organotypic cultures in direct comparison with skin keratinocytes (KCs). This was followed by wound healing study to compare the effects of CLEC application and the traditional use of human skin allografts (HSGs) in a porcine wound model. While CLECs were found to express all the epidermal cell markers probed, the major difference between CLECs and KCs lies in the level of expression (in FC analysis) as well as in the location of expression (of the epithelium in organotypic cultures) of some of the basal cell markers probed. On the pig wounds, CLEC application promoted accelerated healing with no adverse reaction compared to HSG use. Though CLECs, like HSGs, elicited high levels of local and systemic immune responses in the animals during the first week, these effects were tapered off more quickly in the CLEC-treated group. Overall, the in vivo porcine data point to the potential of CLECs as a non-native and safe source of cells to treat cutaneous wounds.
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Abstract
Chronic wounds are characterized by their inability to heal within an expected time frame and have emerged as an increasingly important clinical problem over the past several decades, owing to their increasing incidence and greater recognition of associated morbidity and socio-economic burden. Even up to a few years ago, the management of chronic wounds relied on standards of care that were outdated. However, the approach to these chronic conditions has improved, with better prevention, diagnosis and treatment. Such improvements are due to major advances in understanding of cellular and molecular aspects of basic science, in innovative and technological breakthroughs in treatment modalities from biomedical engineering, and in our ability to conduct well-controlled and reliable clinical research. The evidence-based approaches resulting from these advances have become the new standard of care. At the same time, these improvements are tempered by the recognition that persistent gaps exist in scientific knowledge of impaired healing and the ability of clinicians to reduce morbidity, loss of limb and mortality. Therefore, taking stock of what is known and what is needed to improve understanding of chronic wounds and their associated failure to heal is crucial to ensuring better treatments and outcomes.
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Komprda T, Sládek Z, Vícenová M, Simonová J, Franke G, Lipový B, Matejovičová M, Kacvinská K, Sabliov C, Astete CE, Levá L, Popelková V, Bátik A, Vojtová L. Effect of Polymeric Nanoparticles with Entrapped Fish Oil or Mupirocin on Skin Wound Healing Using a Porcine Model. Int J Mol Sci 2022; 23:ijms23147663. [PMID: 35887016 PMCID: PMC9318284 DOI: 10.3390/ijms23147663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 06/30/2022] [Accepted: 07/04/2022] [Indexed: 11/16/2022] Open
Abstract
The utilization of poly(lactic-co-glycolic) acid (PLGA) nanoparticles (NPs) with entrapped fish oil (FO) loaded in collagen-based scaffolds for cutaneous wound healing using a porcine model is unique for the present study. Full-depth cutaneous excisions (5 × 5 cm) on the pig dorsa were treated with pure collagen scaffold (control, C), empty PLGA NPs (NP), FO, mupirocin (MUP), PLGA NPs with entrapped FO (NP/FO) and PLGA NPs with entrapped MUP (NP/MUP). The following markers were evaluated on days 0, 3, 7, 14 and 21 post-excision: collagen, hydroxyproline (HP), angiogenesis and expressions of the COX2, EGF, COL1A1, COL1A3, TGFB1, VEGFA, CCL5 and CCR5 genes. The hypothesis that NP/FO treatment is superior to FO alone and that it is comparable to NP/MUP was tested. NP/FO treatment increased HP in comparison with both FO alone and NP/MUP (day 14) but decreased (p < 0.05) angiogenesis in comparison with FO alone (day 3). NP/FO increased (p < 0.05) the expression of the CCR5 gene (day 3) and tended (p > 0.05) to increase the expressions of the EGF (day 7, day 14), TGFB1 (day 21) and CCL5 (day 7, day 21) genes as compared with NP/MUP. NP/FO can be suggested as a suitable alternative to NP/MUP in cutaneous wound treatment.
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Affiliation(s)
- Tomáš Komprda
- Department of Food Technology, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic; (J.S.); (G.F.); (M.M.); (V.P.)
- Correspondence:
| | - Zbyšek Sládek
- Department of Animal Morphology, Physiology and Genetics, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic; (Z.S.); (A.B.)
| | - Monika Vícenová
- Department of Infectious Diseases and Preventive Medicine, Veterinary Research Institute, Hudcova 296/70, 621 00 Brno, Czech Republic; (M.V.); (L.L.)
| | - Jana Simonová
- Department of Food Technology, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic; (J.S.); (G.F.); (M.M.); (V.P.)
| | - Gabriela Franke
- Department of Food Technology, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic; (J.S.); (G.F.); (M.M.); (V.P.)
| | - Břetislav Lipový
- Department of Burns and Plastic Surgery, Faculty of Medicine, Institution Shared with University Hospital Brno, Masaryk University, 625 00 Brno, Czech Republic;
- Central European Institute of Technology, University of Technology, Purkynova 123, 612 00 Brno, Czech Republic; (K.K.); (L.V.)
| | - Milena Matejovičová
- Department of Food Technology, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic; (J.S.); (G.F.); (M.M.); (V.P.)
| | - Katarína Kacvinská
- Central European Institute of Technology, University of Technology, Purkynova 123, 612 00 Brno, Czech Republic; (K.K.); (L.V.)
| | - Cristina Sabliov
- Department of Biological and Agricultural Engineering, Louisiana State University, Baton Rouge, LA 70803, USA; (C.S.); (C.E.A.)
| | - Carlos E. Astete
- Department of Biological and Agricultural Engineering, Louisiana State University, Baton Rouge, LA 70803, USA; (C.S.); (C.E.A.)
| | - Lenka Levá
- Department of Infectious Diseases and Preventive Medicine, Veterinary Research Institute, Hudcova 296/70, 621 00 Brno, Czech Republic; (M.V.); (L.L.)
| | - Vendula Popelková
- Department of Food Technology, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic; (J.S.); (G.F.); (M.M.); (V.P.)
| | - Andrej Bátik
- Department of Animal Morphology, Physiology and Genetics, Mendel University in Brno, Zemedelska 1, 613 00 Brno, Czech Republic; (Z.S.); (A.B.)
| | - Lucy Vojtová
- Central European Institute of Technology, University of Technology, Purkynova 123, 612 00 Brno, Czech Republic; (K.K.); (L.V.)
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Vaze N, Demokritou P. Using engineered water nanostructures (EWNS) for wound disinfection: Case study of Acinetobacter baumannii inactivation on skin and the inhibition of biofilm formation. NANOMEDICINE : NANOTECHNOLOGY, BIOLOGY, AND MEDICINE 2022; 42:102537. [PMID: 35181526 DOI: 10.1016/j.nano.2022.102537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 12/01/2021] [Accepted: 02/04/2022] [Indexed: 06/14/2023]
Abstract
Engineered water nanostructures (EWNS) were utilized to deliver a cocktail of nature derived antimicrobials, to assess their efficacy as a solution to the problem of wound infections. The wound related microorganism Acinetobacter baumannii was inoculated on stainless steel and porcine skin and treated with EWNS. EWNS were able to reduce A. baumannii on stainless steel by 4.79 logs in 15 min, and 2 logs in 30 min on porcine skin. The EWNS were able to reduce the strength of A. baumannii biofilm on stainless steel by 87.31% as measured with the XTT assay (P < .001) and 86.27% in cellular counts (P < .001), after two EWNS interventions of 30 min each. Total antimicrobial dose delivered to the surface was 1.42 ng. SEM of biofilms after EWNS treatment showed reduced biomass. These results indicate that the EWNS technology has potential for application in field of wound disinfection and healing.
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Affiliation(s)
- Nachiket Vaze
- Center for Nanotechnology and Nanotoxicology, Harvard T.H. Chan School of Public Health, Boston, MA
| | - Philip Demokritou
- Henry Rutgers Chair in Nanoscience and Environmental Bioengineering at the Rutgers School of Public Health and Environmental and Occupational Health Sciences Institute, Piscataway, NJ.
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Tuca AC, Bernardelli de Mattos I, Funk M, Winter R, Palackic A, Groeber-Becker F, Kruse D, Kukla F, Lemarchand T, Kamolz LP. Orchestrating the Dermal/Epidermal Tissue Ratio during Wound Healing by Controlling the Moisture Content. Biomedicines 2022; 10:biomedicines10061286. [PMID: 35740308 PMCID: PMC9219632 DOI: 10.3390/biomedicines10061286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 05/26/2022] [Accepted: 05/27/2022] [Indexed: 01/13/2023] Open
Abstract
A balanced and moist wound environment and surface increases the effect of various growth factors, cytokines, and chemokines, stimulating cell growth and wound healing. Considering this fact, we tested in vitro and in vivo water evaporation rates from the cellulose dressing epicitehydro when combined with different secondary dressings as well as the resulting wound healing efficacy in a porcine donor site model. The aim of this study was to evaluate how the different rates of water evaporation affected wound healing efficacy. To this end, epicitehydro primary dressing, in combination with different secondary dressing materials (cotton gauze, JELONET◊, AQUACEL® Extra ™, and OPSITE◊ Flexifix), was placed on 3 × 3 cm-sized dermatome wounds with a depth of 1.2 mm on the flanks of domestic pigs. The healing process was analyzed histologically and quantified by morphometry. High water evaporation rates by using the correct secondary dressing, such as cotton gauze, favored a better re-epithelialization in comparison with the low water evaporation resulting from an occlusive secondary dressing, which favored the formation of a new and intact dermal tissue that nearly fully replaced all the dermis that was removed during wounding. This newly available evidence may be of great benefit to clinical wound management.
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Affiliation(s)
- Alexandru-Cristian Tuca
- Department of Surgery, Division of Plastic, Aesthetic and Reconstructive Surgery, Medical University of Graz, 8036 Graz, Austria; (R.W.); (A.P.); (L.-P.K.)
- Correspondence: ; Tel.: +43-316-385-30742
| | - Ives Bernardelli de Mattos
- Department Tissue Engineering & Regenerative Medicine (TERM), University Hospital Würzburg, 97080 Würzburg, Germany; (I.B.d.M.); (F.G.-B.); (D.K.)
| | | | - Raimund Winter
- Department of Surgery, Division of Plastic, Aesthetic and Reconstructive Surgery, Medical University of Graz, 8036 Graz, Austria; (R.W.); (A.P.); (L.-P.K.)
| | - Alen Palackic
- Department of Surgery, Division of Plastic, Aesthetic and Reconstructive Surgery, Medical University of Graz, 8036 Graz, Austria; (R.W.); (A.P.); (L.-P.K.)
| | - Florian Groeber-Becker
- Department Tissue Engineering & Regenerative Medicine (TERM), University Hospital Würzburg, 97080 Würzburg, Germany; (I.B.d.M.); (F.G.-B.); (D.K.)
- Translational Center Regenerative Therapies, Fraunhofer Institute for Silicate Research ISC, 97080 Würzburg, Germany
| | - Daniel Kruse
- Department Tissue Engineering & Regenerative Medicine (TERM), University Hospital Würzburg, 97080 Würzburg, Germany; (I.B.d.M.); (F.G.-B.); (D.K.)
| | - Fabian Kukla
- TPL Path Labs GmbH, 79111 Freiburg, Germany; (F.K.); (T.L.)
| | | | - Lars-Peter Kamolz
- Department of Surgery, Division of Plastic, Aesthetic and Reconstructive Surgery, Medical University of Graz, 8036 Graz, Austria; (R.W.); (A.P.); (L.-P.K.)
- Joanneum Research Forschungsgesellschaft mbH, COREMED, 8036 Graz, Austria
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41
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Li M, Yuan J, Hou Q, Zhao Y, Zhong L, Dai X, Chen H, Fu X. Characterization of the Skin Bacteriome and Histology Changes in Diabetic Pigs. INT J LOW EXTR WOUND 2022:15347346221100887. [PMID: 35548944 DOI: 10.1177/15347346221100887] [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: 11/17/2022]
Abstract
Chronic wound is one of the most common complications that are associated with diabetes. The cutaneous microbiome is known to play essential roles in the regulation of barrier function and protecting against potential assault. Thus, it is necessary to gain a better understanding of the relationship between microbial community and skin structures in unwounded diabetic skin to explore possible preventive strategies. To achieve the same, a pig diabetic model was built in the present study. Further,16S rDNA sequencing was used to characterize the skin bacteriome. It was observed that the pigs showed skin bacteriome similar to humans in the non-diabetes group, while it varied in the case of diabetes. Further, the β-diversity analysis showed that the bacterial community was significantly different under the diabetes group. More species differences were identified between the two groups at genus level. The predictive function analysis also showed the involvement of significantly different pathways of microbial gene function in diabetes. In agreement with this, skin histology analysis also showed signs of reduced epidermal thickness and rete ridges in diabetic skin. Less proliferation of keratinocytes and impaired TJ barrier was also detected. This evidence suggested that pigs might serve as the best surrogate for cutaneous microbiome studies. Altogether, the present study reported that the skin bacteriome and histology changed significantly in unwounded diabetic skin, which provided a theoretical basis for the regulation of disordered skin bacteriome. The findings of the study would assist in the improvement of the skin environment and prevention of skin infection and chronic wounds.
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Affiliation(s)
- Meirong Li
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Division and 4th Medical Center, PLA General Hospital and PLA Medical College, Beijing, China
- PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, Beijing, China
- Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences 2019RU051, Beijing, China
- Central Laboratory, Trauma Treatment Center, Central Laboratory, 104607Chinese PLA General Hospital, Hainan Hospital, Sanya, China
| | - Jifang Yuan
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Division and 4th Medical Center, PLA General Hospital and PLA Medical College, Beijing, China
- PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, Beijing, China
- Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences 2019RU051, Beijing, China
- Central Laboratory, Trauma Treatment Center, Central Laboratory, 104607Chinese PLA General Hospital, Hainan Hospital, Sanya, China
- Laboratory Animal Center, Medical Innovation Research Division of 104607Chinese PLA General Hospital, Beijing, P. R. China
| | - Qian Hou
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Division and 4th Medical Center, PLA General Hospital and PLA Medical College, Beijing, China
- PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, Beijing, China
- Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences 2019RU051, Beijing, China
| | - Yali Zhao
- Central Laboratory, Trauma Treatment Center, Central Laboratory, 104607Chinese PLA General Hospital, Hainan Hospital, Sanya, China
| | - Lingzhi Zhong
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Division and 4th Medical Center, PLA General Hospital and PLA Medical College, Beijing, China
- PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, Beijing, China
- Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences 2019RU051, Beijing, China
| | - Xin Dai
- Laboratory Animal Center, Medical Innovation Research Division of 104607Chinese PLA General Hospital, Beijing, P. R. China
| | - Hua Chen
- Laboratory Animal Center, Medical Innovation Research Division of 104607Chinese PLA General Hospital, Beijing, P. R. China
| | - Xiaobing Fu
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Division and 4th Medical Center, PLA General Hospital and PLA Medical College, Beijing, China
- PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, Beijing, China
- Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences 2019RU051, Beijing, China
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42
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Eshkol‐Yogev I, Tobias T, Keren A, Gilhar A, Gilboa E, Furer A, Ullmann Y, Zilberman M. Dual composite bioadhesives for wound closure applications: An in vitro and in vivo study. POLYM ADVAN TECHNOL 2022. [DOI: 10.1002/pat.5691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Inbar Eshkol‐Yogev
- Department of Biomedical Engineering Tel‐Aviv University Tel‐Aviv Israel
| | - Tal Tobias
- Faculty of Medicine Technion – Israel Institute of Technology Haifa Israel
- Dept. of Plastic Surgery and the Burn Unit Rambam Health Care Campus Haifa Israel
| | - Aviad Keren
- Faculty of Medicine Technion – Israel Institute of Technology Haifa Israel
| | - Amos Gilhar
- Faculty of Medicine Technion – Israel Institute of Technology Haifa Israel
| | - Efrat Gilboa
- Department of Materials Science and Engineering Tel‐Aviv University Tel‐Aviv Israel
| | - Ariel Furer
- Medical Corps Israel Defense Forces Ramat Gan Israel
- Department of Military Medicine, Faculty of Medicine Hebrew University of Jerusalem Jerusalem Israel
| | - Yehuda Ullmann
- Faculty of Medicine Technion – Israel Institute of Technology Haifa Israel
- Dept. of Plastic Surgery and the Burn Unit Rambam Health Care Campus Haifa Israel
| | - Meital Zilberman
- Department of Biomedical Engineering Tel‐Aviv University Tel‐Aviv Israel
- Department of Materials Science and Engineering Tel‐Aviv University Tel‐Aviv Israel
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43
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Jeong W, Hong J, Jung M, Jang M, An S, Jo T, Kwon S, Son D. Therapeutic Effects of Amnion-Conjugated Chitosan-Alginate Membranes on Diabetic Wounds in an Induced Diabetic Swine Model: An In Vitro and In Vivo Study. Arch Plast Surg 2022; 49:258-265. [PMID: 35832677 PMCID: PMC9045513 DOI: 10.1055/s-0042-1744429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background
Chitosan (CS) is a well-known antimicrobial dressing material. Moreover, widely used amniotic membranes contain growth factors beneficial for wound healing. Herein, we created a novel amnion-conjugated CS-alginate membrane dressing and tested its wound healing potency in a diabetic swine model.
Methods
The bovine amniotic powder growth factor contents were evaluated by protein assay, and the powder's wound healing effects were assessed in vitro by HaCaT cell scratch closure. In vivo, two minipigs developed streptozotocin-induced diabetes. Serial serum glucose measurements and intravenous glucose tolerance tests were performed to confirm their diabetic status. Twelve square-shaped wounds created on each pig's back were randomly divided into control (
n
= 4), CS (
n
= 4), and amnion-CS (AC;
n
= 4) groups and treated accordingly with different dressings. Wound healing in each group was assessed by measuring wound contraction over time, capturing wound perfusion with indocyanine green (ICG) angiography, and histologically analyzing inflammatory markers.
Results
Amniotic powder elution promoted HaCaT cell migration in the scratch wound model, suggesting its beneficial in vitro wound healing effects. In vivo, the CS and AC groups showed earlier wound contraction initiation and reepithelialization and earlier wound perfusion improvement by ICG angiography than the control group. Additionally, the wound size of the AC group at week 3 was significantly smaller than those in the control group. There was no significant difference in the numbers of acute and chronic inflammatory cells between the groups.
Conclusion
The amnion-conjugated CS-alginate membrane, as well as CS dressing alone, could be a favorable dressing option for diabetic wounds.
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Affiliation(s)
- Woonhyeok Jeong
- Department of Plastic and Reconstructive Surgery, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea
| | - Jamin Hong
- Department of Plastic and Reconstructive Surgery, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea
| | - Minho Jung
- Department of Research and Development, Endovision, Daegu, Korea
| | - Mijin Jang
- Laboratory Animal Center, Daegu Gyeongbuk Medical Innovation Foundation, Daegu, Korea
| | - Sanghyun An
- Laboratory Animal Center, Daegu Gyeongbuk Medical Innovation Foundation, Daegu, Korea
| | - Taehee Jo
- Department of Plastic and Reconstructive Surgery, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea
| | - Sunyoung Kwon
- Department of Pathology, Keimyung University School of Medicine, Daegu, Korea
| | - Daegu Son
- Department of Plastic and Reconstructive Surgery, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea
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44
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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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45
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Zhu H, Luo H, Lin M, Li Y, Chen A, He H, Sheng F, Wu J. Methacrylated gelatin shape-memorable cryogel subcutaneously delivers EPCs and aFGF for improved pressure ulcer repair in diabetic rat model. Int J Biol Macromol 2022; 199:69-76. [PMID: 34973992 DOI: 10.1016/j.ijbiomac.2021.12.138] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 12/18/2021] [Accepted: 12/20/2021] [Indexed: 12/22/2022]
Abstract
Pressure ulcer (PU) in patients with diabetes mellitus (DM) is still a clinical intractable issue due to the complicated physiological characteristics by the prolonged high glucose level and impaired angiogenesis. The PU treatment includes surgical debridement, stem cell therapy and growth factors, leading to high cost and repeated professional involvement. Developing effective wound dressing combining the therapeutic cells and growth factors has become highly demanded. Herein, we reported the direct subcutaneous administration of endothelial progenitor cells (EPCs) and acid fibroblast growth factor (aFGF) with a shape-memorable methacrylated gelatin cryogel (EPCs/aFGF@GelMA) for the therapy of PU in rats with DM. This EPCs/aFGF@GelMA cryogel system presented microporous structure, elastic mechanical strength and enhanced cell migration property with controlled release of aFGF. Moreover, compared with EPCs/aFGF and GelMA alone, in vivo results showed that this EPCs/aFGF@GelMA system exhibited accelerated wound closure rate, enhanced granulation formation, collagen deposition as well as re-epithelization. Importantly, we found that the excellent positive performance of EPCs/aFGF@GelMA is due to its up-regulation of HIF-ɑ upon the wound site, modulating the microenvironment of wound site to initiate the impaired local angiogenesis. Collectively, this hybrid gelatin cryogels show great promise for biomedical applications, especially in tissue engineering and regenerative medicine.
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Affiliation(s)
- Hong Zhu
- Department of Endocrinology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, PR China
| | - Hangqi Luo
- School of Pharmaceutical Sciences, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang, PR China
| | - Minjie Lin
- Department of Endocrinology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, PR China
| | - Yuan Li
- Department of Endocrinology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, PR China
| | - Anqi Chen
- School of Pharmaceutical Sciences, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang, PR China
| | - Huacheng He
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, PR China.
| | - Feixia Sheng
- Department of Endocrinology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, PR China
| | - Jiang Wu
- Department of Endocrinology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, PR China; School of Pharmaceutical Sciences, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang, PR China.
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46
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Han L, Jara CP, Wang O, Shi Y, Wu X, Thibivilliers S, Wóycicki RK, Carlson MA, Velander WH, Araújo EP, Libault M, Zhang C, Lei Y. Isolating and cryopreserving pig skin cells for single-cell RNA sequencing study. PLoS One 2022; 17:e0263869. [PMID: 35176067 PMCID: PMC8853494 DOI: 10.1371/journal.pone.0263869] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 01/29/2022] [Indexed: 11/27/2022] Open
Abstract
The pig skin architecture and physiology are similar to those of humans. Thus, the pig model is very valuable for studying skin biology and testing therapeutics. The single-cell RNA sequencing (scRNA-seq) technology allows quantitatively analyzing cell types, compositions, states, signaling, and receptor-ligand interactome at single-cell resolution and at high throughput. scRNA-seq has been used to study mouse and human skins. However, studying pig skin with scRNA-seq is still rare. A critical step for successful scRNA-seq is to obtain high-quality single cells from the pig skin tissue. Here we report a robust method for isolating and cryopreserving pig skin single cells for scRNA-seq. We showed that pig skin could be efficiently dissociated into single cells with high cell viability using the Miltenyi Human Whole Skin Dissociation kit and the Miltenyi gentleMACS Dissociator. Furthermore, the obtained single cells could be cryopreserved using 90% FBS + 10% DMSO without causing additional cell death, cell aggregation, or changes in gene expression profiles. Using the developed protocol, we were able to identify all the major skin cell types. The protocol and results from this study are valuable for the skin research scientific community.
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Affiliation(s)
- Li Han
- School of Biological Science, University of Nebraska, Lincoln, Nebraska, United States of America
- Department of Chemical and Biomolecular Engineering, University of Nebraska, Lincoln, Nebraska, United States of America
- Department of Biomedical Engineering, Pennsylvania State University, University Park, Pennsylvania, United States of America
- Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Carlos P. Jara
- Nursing School, University of Campinas, Campinas SP, Brazil
- Laboratory of Cell Signaling, University of Campinas, Campinas SP, Brazil
| | - Ou Wang
- Department of Chemical and Biomolecular Engineering, University of Nebraska, Lincoln, Nebraska, United States of America
| | - Yu Shi
- School of Biological Science, University of Nebraska, Lincoln, Nebraska, United States of America
| | - Xinran Wu
- Department of Biomedical Engineering, Pennsylvania State University, University Park, Pennsylvania, United States of America
- Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Sandra Thibivilliers
- Department of Agronomy and Horticulture, Center for Plant Science Innovation, University of Nebraska, Lincoln, Nebraska, United States of America
| | - Rafał K. Wóycicki
- Department of Agronomy and Horticulture, Center for Plant Science Innovation, University of Nebraska, Lincoln, Nebraska, United States of America
| | - Mark A. Carlson
- Mary and Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
- Department of Surgery, University of Nebraska Medical Center and the VA Nebraska-Western Iowa Health Care System, Omaha, Nebraska, United States of America
| | - William H. Velander
- Department of Chemical and Biomolecular Engineering, University of Nebraska, Lincoln, Nebraska, United States of America
| | - Eliana P. Araújo
- Nursing School, University of Campinas, Campinas SP, Brazil
- Laboratory of Cell Signaling, University of Campinas, Campinas SP, Brazil
| | - Marc Libault
- Department of Agronomy and Horticulture, Center for Plant Science Innovation, University of Nebraska, Lincoln, Nebraska, United States of America
| | - Chi Zhang
- School of Biological Science, University of Nebraska, Lincoln, Nebraska, United States of America
| | - Yuguo Lei
- Department of Chemical and Biomolecular Engineering, University of Nebraska, Lincoln, Nebraska, United States of America
- Department of Biomedical Engineering, Pennsylvania State University, University Park, Pennsylvania, United States of America
- Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, Pennsylvania, United States of America
- Mary and Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
- Department of Surgery, University of Nebraska Medical Center and the VA Nebraska-Western Iowa Health Care System, Omaha, Nebraska, United States of America
- Sartorius Mammalian Cell Culture Facility, Pennsylvania State University, University Park, Pennsylvania, United States of America
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47
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Lovasova V, Bem R, Chlupac J, Dubsky M, Husakova J, Nemcova A, Fronek J. Animal experimental models of ischemic wounds - A review of literature. Wound Repair Regen 2022; 30:268-281. [PMID: 35138685 DOI: 10.1111/wrr.12996] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 11/23/2021] [Accepted: 01/16/2022] [Indexed: 02/01/2023]
Abstract
Critical limb ischemia is a serious form of peripheral arterial disease (PAD). The consequences of lower limb ischemia are pain, claudication and chronic non-healing wounds. Patients with diabetes are especially at a high risk for developing non-healing ulcers. The most serious complication is major amputation. For this reason, there is a significant medical requirement to develop new therapies in order to prevent the progression of PAD. For research purposes, it is crucial to find an appropriate model of chronic ischemia to explore the processes of wound healing. According to recently acquired information, rodents are currently the most commonly used animals in these types of studies. The main advantage of using small animals is the low financial cost due to the relatively small demand for food, water and living space. The disadvantage is their anatomy, which is different from that of humans. Larger animals have a more human-like anatomy and physiology, but they require more expense and space for housing. A bipedicle skin flap and its modifications are popular models for ischemic wounds. In order to secure healing through re-epithelisation, as opposed to contraction in rodents, there is a need to remove the panniculus carnosus muscle. Wounds in other experimental animals heal primarily through re-epithelisation. The application of a silicone mesh underneath the flap prevents vascular regrowth in ischemic tissue. There is an ongoing effort to create in vivo diabetic models for chronic ulcer research. This work presents an overview of existing animal models of ischemic wounds.
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Affiliation(s)
- Veronika Lovasova
- Transplant Surgery Department, Institute for Clinical and Experimental Medicine, Prague, Czech Republic.,Second Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Robert Bem
- Diabetes Centre, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Jaroslav Chlupac
- Transplant Surgery Department, Institute for Clinical and Experimental Medicine, Prague, Czech Republic.,Department of Anatomy, Second Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Michal Dubsky
- Diabetes Centre, Institute for Clinical and Experimental Medicine, Prague, Czech Republic.,First Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Jitka Husakova
- Diabetes Centre, Institute for Clinical and Experimental Medicine, Prague, Czech Republic.,First Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Andrea Nemcova
- Diabetes Centre, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Jiri Fronek
- Transplant Surgery Department, Institute for Clinical and Experimental Medicine, Prague, Czech Republic.,Department of Anatomy, Second Faculty of Medicine, Charles University, Prague, Czech Republic.,First Faculty of Medicine, Charles University, Prague, Czech Republic
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48
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Gil J, Solis M, Higa A, Davis SC. Candida albicans Infections: a novel porcine wound model to evaluate treatment efficacy. BMC Microbiol 2022; 22:45. [PMID: 35120444 PMCID: PMC8815218 DOI: 10.1186/s12866-022-02460-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 01/24/2022] [Indexed: 11/15/2022] Open
Abstract
Candida albicans is a common cause of opportunistic mycoses worldwide and a major contributor in wound infections. The purpose of this study was to establish a fungal wound model and analyze the effects of a common antifungal agent against the proliferation of three C. albicans strains. Second degree burns were created, and then inoculated with one of three different C. albicans ATCC strains: 10261 reference strain, 64550 fluconazole resistant and 26310 fluconazole sensitive. After fungal inoculation, every wound was covered with dressings for 4 h to allow fungal colonization on every wound bed. After 4 h, the dressings were removed, and each wound was treated either once or twice daily with a topical terbinafine hydrochloride or left untreated. On days 2, 4 and 7 post inoculation, three wounds from each treatment group were scrub cultured and quantified. On day 2, wounds infected with the sensitive strains 26310 and 10261 and treated twice showed a significant reduction when compared against those infected wounds receiving once daily treatment. On day 4, wounds which were infected with C. albicans fluconazole sensitive (ATCC 26310) showed a significant reduction in fungal cell counts with treatment applied twice daily. A significant reduction in the colony counts was exhibited in all three strains at the seventh day with active as compared to the non-treated wounds. Twice daily treatment resulted in a lower fungal count than once daily treatment. Neither treatment was able to entirely eradicate C. albicans during the duration of this study. Establishing a reliable fungal wound model will help in the translational goal of identifying new antifungal that could be used clinically by wound care providers.
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Affiliation(s)
- Joel Gil
- Miller School of Medicine, Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery Wound Healing Research Laboratory Miami, University of Miami, Miami, 33136, FL, United States.
| | - Michael Solis
- Miller School of Medicine, Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery Wound Healing Research Laboratory Miami, University of Miami, Miami, 33136, FL, United States
| | - Alexander Higa
- Miller School of Medicine, Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery Wound Healing Research Laboratory Miami, University of Miami, Miami, 33136, FL, United States
| | - Stephen C Davis
- Miller School of Medicine, Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery Wound Healing Research Laboratory Miami, University of Miami, Miami, 33136, FL, United States
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49
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Rai V, Moellmer R, Agrawal DK. Clinically relevant experimental rodent models of diabetic foot ulcer. Mol Cell Biochem 2022; 477:1239-1247. [PMID: 35089527 DOI: 10.1007/s11010-022-04372-w] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Accepted: 01/23/2022] [Indexed: 12/19/2022]
Abstract
Chronic wounds are a substantial clinical problem in diabetes and nearly 6% of diabetics suffer from foot disease including ulceration, infection, and tissue necrosis. Wound healing in diabetes is impaired and delayed and is augmented by diabetic complications. Wound healing involves complex cellular, molecular, and biochemical processes and animal models are the most suitable prototype to investigate and understand the underlying pathological changes in the process of wound healing. Animal models are also useful in evaluating the safety and efficacy of newer therapeutic agents and improving the clinical approaches for human patients with chronic ulcers. The wound healing strategies get more complicated in the presence of diabetes and its associated complication. Despite the advancement in methods of wound healing, the healing of the chronic diabetic foot ulcer (DFU) remains an important clinical problem resulting in costly and prolonged treatment and poses a risk for major amputation. Saying that it is important to elucidate the newer therapeutic targets and strategies via an in-depth understanding of the complicated cascade of the chronic DFU. A major challenge in translating lab findings to clinics is the lack of an optimal preclinical model capable of properly recapitulating human wounds. Both small and large animal models of wound healing involving rodents, rabbits, and pigs have been discussed. Mouse and rats as small animal models and pig as large animal models have been discussed in association with the diabetic wound but there are advantages and limitations for each model. In this review, we critically reviewed the pros and cons of experimental models of diabetic wound healing with a focus on type II diabetes rodent models.
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Affiliation(s)
- Vikrant Rai
- Department of Translational Research, Western University of Health Sciences, 309 E. Second Street, Pomona, CA, 91766-1854, USA.
| | - Rebecca Moellmer
- Western University College of Podiatric Medicine, Pomona, CA, 91766, USA
| | - Devendra K Agrawal
- Department of Translational Research, Western University of Health Sciences, 309 E. Second Street, Pomona, CA, 91766-1854, USA
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50
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Harness EM, Mohamad-Fauzi N, Murray JD. MSC therapy in livestock models. Transl Anim Sci 2022; 6:txac012. [PMID: 35356233 PMCID: PMC8962450 DOI: 10.1093/tas/txac012] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 01/24/2022] [Indexed: 11/25/2022] Open
Abstract
Mesenchymal stem cells (MSCs) have great value as therapeutic tools in a wide array of applications in regenerative medicine. The wide repertoire of cell functions regarding tissue regeneration, immunomodulation, and antimicrobial activity makes MSC-based therapy a strong candidate for treatment options in a variety of clinical conditions and should be studied to expand the current breadth of knowledge surrounding their physiological properties and therapeutic benefits. Livestock models are an appropriate resource for testing the efficacy of MSC therapies for their use in biomedical research and can be used to improve both human health and animal agriculture. Agricultural animal models such as pigs, cattle, sheep, and goats have grown in popularity for in vivo research relative to small animal models due to their overlapping similarities in structure and function that more closely mimic the human body. Cutaneous wound healing, bone regeneration, osteoarthritis, ischemic reperfusion injury, and mastitis recovery represent a few examples of the types of disease states that may be investigated in livestock using MSC-based therapy. Although the cost of agricultural animals is greater than small animal models, the information gained using livestock as a model holds great value for human applications, and in some cases, outcompetes the weight of information gained from rodent models. With emerging fields such as exosome-based therapy, proper in vivo models will be needed for testing efficacy and translational practice, i.e., livestock models should be strongly considered as candidates. The potential for capitalizing on areas that have crossover benefits for both agricultural economic gain and improved health of the animals while minimizing the gap between translational research and clinical practice are what make livestock great choices for experimental MSC models.
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Affiliation(s)
- E M Harness
- Department of Animal Science, University of California, Davis, One Shields Ave, Davis, CA, USA
| | - N Mohamad-Fauzi
- Institute of Biological Sciences, Faculty of Science
- Institute of Ocean and Earth Sciences, Institute for Advanced Studies, Universiti Malaya, Kuala Lumpur, MALAYSIA
| | - J D Murray
- Department of Animal Science, University of California, Davis, One Shields Ave, Davis, CA, USA
- Department of Population Health and Reproduction, University of California, Davis, One Shields Ave, Davis, CA, USA
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