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Berkane Y, Cascales JP, Roussakis E, Lellouch AG, Slade J, Bertheuil N, Randolph MA, Cetrulo CL, Evans CL, Uygun K. Continuous oxygen monitoring to enhance ex-vivo organ machine perfusion and reconstructive surgery. Biosens Bioelectron 2024; 262:116549. [PMID: 38971037 DOI: 10.1016/j.bios.2024.116549] [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: 03/24/2024] [Revised: 06/18/2024] [Accepted: 07/02/2024] [Indexed: 07/08/2024]
Abstract
Continuous oxygenation monitoring of machine-perfused organs or transposed autologous tissue is not currently implemented in clinical practice. Oxygenation is a critical parameter that could be used to verify tissue viability and guide corrective interventions, such as perfusion machine parameters or surgical revision. This work presents an innovative technology based on oxygen-sensitive, phosphorescent metalloporphyrin allowing continuous and non-invasive oxygen monitoring of ex-vivo perfused vascularized fasciocutaneous flaps. The method comprises a small, low-energy optical transcutaneous oxygen sensor applied on the flap's skin paddle as well as oxygen sensing devices placed into the tubing. An intermittent perfusion setting was designed to study the response time and accuracy of this technology over a total of 54 perfusion cycles. We further evaluated correlation between the continuous oxygen measurements and gold-standard perfusion viability metrics such as vascular resistance, with good agreement suggesting potential to monitor graft viability at high frequency, opening the possibility to employ feedback control algorithms in the future. This proof-of-concept study opens a range of research and clinical applications in reconstructive surgery and transplantation at a time when perfusion machines undergo rapid clinical adoption with potential to improve outcomes across a variety of surgical procedures and dramatically increase access to transplant medicine.
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Affiliation(s)
- Yanis Berkane
- Vascularized Composite Allotransplantation Laboratory, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, 02114, MA, USA; Department of Plastic, Reconstructive and Aesthetic Surgery, CHU de Rennes, Rennes University, Rennes, 35000, France; Shriners Children's, Boston, 02114, MA, USA; MOBIDIC, UMR1236, INSERM, Rennes University, Rennes, 35000, France
| | - Juan Pedro Cascales
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, 02129, MA, USA; Departamento de Química en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense de Madrid, Madrid, 28040, Spain
| | - Emmanuel Roussakis
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, 02129, MA, USA
| | - Alexandre G Lellouch
- Vascularized Composite Allotransplantation Laboratory, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, 02114, MA, USA; Shriners Children's, Boston, 02114, MA, USA
| | - Julian Slade
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, 02129, MA, USA
| | - Nicolas Bertheuil
- Department of Plastic, Reconstructive and Aesthetic Surgery, CHU de Rennes, Rennes University, Rennes, 35000, France; MOBIDIC, UMR1236, INSERM, Rennes University, Rennes, 35000, France
| | - Mark A Randolph
- Vascularized Composite Allotransplantation Laboratory, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, 02114, MA, USA; Shriners Children's, Boston, 02114, MA, USA
| | - Curtis L Cetrulo
- Vascularized Composite Allotransplantation Laboratory, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, 02114, MA, USA; Shriners Children's, Boston, 02114, MA, USA
| | - Conor L Evans
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, 02129, MA, USA.
| | - Korkut Uygun
- Department of Plastic, Reconstructive and Aesthetic Surgery, CHU de Rennes, Rennes University, Rennes, 35000, France; Center for Engineering in Medicine and Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, 02114, MA, USA.
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Espíndola-Rodríguez NH, Muñoz-Cázares N, Serralta-Peraza LEDS, Díaz-Nuñez JL, Montoya-Reyes F, García-Contreras R, Díaz-Guerrero M, Rivera-Chávez JA, Gutiérrez J, Sotelo-Barrera M, Castillo-Juárez I. Antivirulence and antipathogenic activity of Mayan herbal remedies against Pseudomonas aeruginosa. JOURNAL OF ETHNOPHARMACOLOGY 2024; 332:118373. [PMID: 38782309 DOI: 10.1016/j.jep.2024.118373] [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: 03/22/2024] [Revised: 05/11/2024] [Accepted: 05/19/2024] [Indexed: 05/25/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The Yucatan Peninsula has a privileged wealth of vascular plants with which various Mayan herbal formulations have been developed. However, studies on their antipathogenic and antivirulence properties are scarce. AIM OF THE STUDY Identify antivirulence properties in Mayan herbal remedies and determine their antipathogenic capacity in burn wounds infected with Pseudomonas aeruginosa. MATERIALS AND METHODS An ethnobotanical study was conducted in Mayan communities in central and southern Quintana Roo, Mexico. Furthermore, the antipathogenic capacity of three Mayan herbal remedies was analyzed using an animal model of thermal damage and P. aeruginosa infection. Antivirulence properties were determined by inhibiting phenotypes regulated by quorum sensing (pyocyanin, biofilm, and swarming) and by the secretion of the ExoU toxin. The chemical composition of the most active herbal remedy was analyzed using molecular network analysis. RESULTS It was found that topical administration of the remedy called "herbal soap" (HS) for eleven days maintained 100% survival of the animals, reduced establishment of the bacteria in the burn and prevented its systemic dispersion. Although no curative effect was recorded on tissue damaged by HS treatment, its herbal composition strongly reduced swarming and ExoU secretion. Through analysis of Molecular Networks, it was possible to carry out a global study of its chemical components, and identify the family of oxindole monoterpenoid alkaloids and carboline and tetrahydropyrididole alkaloids. In addition, flavonols, flavan-3-ols, and quinic acid derivatives were detected. CONCLUSIONS The antipathogenic and antivirulence capacity of ancient Mayan remedies makes them a potential resource for developing new antibacterial therapies to treat burns infected by P. aeruginosa.
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Affiliation(s)
- Nadine Heidi Espíndola-Rodríguez
- Laboratorio de Investigación y Aplicación de Fitoquímicos Bioactivos, Posgrado en Botánica, Colegio de Postgraduados, Texcoco, 56230, Mexico.
| | - Naybi Muñoz-Cázares
- Campo Experimental Chetumal, Instituto de Investigaciones Forestales, Agrícolas y Pecuarias, Quintana Roo, 77963, Mexico; Investigadora Posdoctoral CONAHCYT Comisionada al Colegio de Postgraduados-Campus Tabasco, Cárdenas, Tabasco, C. P. 86500, Mexico.
| | | | - José Luis Díaz-Nuñez
- Laboratorio de Investigación y Aplicación de Fitoquímicos Bioactivos, Posgrado en Botánica, Colegio de Postgraduados, Texcoco, 56230, Mexico.
| | - Francisco Montoya-Reyes
- Campo Experimental Chetumal, Instituto de Investigaciones Forestales, Agrícolas y Pecuarias, Quintana Roo, 77963, Mexico.
| | - Rodolfo García-Contreras
- Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, CDMX, 04510, Mexico.
| | - Miguel Díaz-Guerrero
- Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, CDMX, 04510, Mexico.
| | - José Alberto Rivera-Chávez
- Departamento de Productos Naturales, Instituto de Química, Universidad Nacional Autónoma de México, CDMX, 04510, Mexico.
| | - Jorge Gutiérrez
- Área de Biología, Departamento de Preparatoria Agrícola, Universidad Autónoma Chapingo, Texcoco, 56230, Mexico.
| | - Mireya Sotelo-Barrera
- Laboratorio de Investigación y Aplicación de Fitoquímicos Bioactivos, Posgrado en Botánica, Colegio de Postgraduados, Texcoco, 56230, Mexico.
| | - Israel Castillo-Juárez
- Laboratorio de Investigación y Aplicación de Fitoquímicos Bioactivos, Posgrado en Botánica, Colegio de Postgraduados, Texcoco, 56230, Mexico; Conahcyt-Instituto de Ciencias Básicas e Ingeniería, Universidad Autónoma del Estado de Hidalgo, Mineral de la Reforma, Hidalgo, 42184, Mexico.
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3
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Naga NG, Shaaban MI, El-Metwally MM. An insight on the powerful of bacterial quorum sensing inhibition. Eur J Clin Microbiol Infect Dis 2024:10.1007/s10096-024-04920-w. [PMID: 39158799 DOI: 10.1007/s10096-024-04920-w] [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: 05/02/2024] [Accepted: 07/31/2024] [Indexed: 08/20/2024]
Abstract
Bacteria have their own language through which they communicate with one another like all higher organisms. So, many researchers are working hard to identify and comprehend the components of this bacterial communication, known as quorum sensing (QS). In quorum sensing, bacteria use signaling molecules called autoinducers (AIs) to exchange information. Many natural compounds and extraction techniques have been intensively studied to disrupt bacterial signaling and examine their effectiveness for bacterial pathogenesis control. Quorum sensing inhibitors can interfere with QS and block the action of AI signaling molecules. Recent research indicates that quorum sensing inhibitors (QSIs) and quorum quenching enzymes (QQEs) show great promise in reducing the pathogenicity of bacteria and inhibiting biofilm synthesis. In addition, the effectiveness of QQEs and QSIs in experimental animal models was demonstrated. These are taken into account in the development of innovative medical devices, such as dressings and catheters, to prevent bacterial infections. The present review highlights this aspect with a prospective vision for its development and application.
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Affiliation(s)
- Nourhan G Naga
- Botany and Microbiology Department, Faculty of Science, Alexandria University, Alexandria, Egypt.
| | - Mona I Shaaban
- Microbiology and Immunology Department, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
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Bieerkehazhi S, Abdullahi A, Khalaf F, Barayan D, de Brito Monteiro L, Samadi O, Rix G, Jeschke MG. β-Adrenergic blockade attenuates adverse adipose tissue responses after burn. J Mol Med (Berl) 2024:10.1007/s00109-024-02478-w. [PMID: 39145814 DOI: 10.1007/s00109-024-02478-w] [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: 03/11/2024] [Revised: 07/12/2024] [Accepted: 08/05/2024] [Indexed: 08/16/2024]
Abstract
Severe burn injuries are defined by a prolonged hypermetabolic response characterized by increases in resting energy expenditure, systemic catabolism, and multi-organ dysfunction. The sustained elevation of catecholamines following a burn injury is thought to significantly contribute to this hypermetabolic response, leading to changes in adipose tissue such as increased lipolysis and the browning of subcutaneous white adipose tissue (WAT). Failure to mitigate these adverse changes within the adipose tissue has been shown to exacerbate the post-burn hypermetabolic response and lead to negative outcomes. Propranolol, a non-selective β-blocker, has been clinically administered to improve outcomes of pediatric and adult burn patients, but there is inadequate knowledge of its effects on the distinct adipose tissue depots. In this study, we investigated the adipose depot-specific alterations that occur in response to burn injury. Moreover, we explored the therapeutic effects of β-adrenoceptor blockade via the drug propranolol in attenuating these burn-induced pathophysiological changes within the different fat depots. Using a murine model of thermal injury, we show that burn injury induces endoplasmic reticulum (ER) stress in the epididymal (eWAT) but not in the inguinal (iWAT) WAT depot. Conversely, burn injury induces the activation of key lipolytic pathways in both eWAT and iWAT depots. Treatment of burn mice with propranolol effectively mitigated adverse burn-induced alterations in the adipose by alleviating ER stress in the eWAT and reducing lipolysis in both depots. Furthermore, propranolol treatment in post-burn mice attenuated UCP1-mediated subcutaneous WAT browning following injury. Overall, our findings suggest that propranolol serves as an effective therapeutic intervention to mitigate the adverse changes induced by burn injury, including ER stress, lipotoxicity, and WAT browning, in both adipose tissue depots. KEY MESSAGES: Burn injury adversely affects adipose tissue metabolism via distinct changes in both visceral and subcutaneous adipose depots. Propranolol, a non-selective β-adrenergic blocker, attenuates many of the adverse adipose tissue changes mediated by burn injury.
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Affiliation(s)
- Shayahati Bieerkehazhi
- Sunnybrook Research Institute, Toronto, ON, Canada
- Department of Surgery, McMaster University, Hamilton, ON, Canada
- David Braley Research Institute, C5-104, 20 Copeland Ave., Hamilton, ON, L8L 2X2, Canada
- Centre for Burn Research, Hamilton Health Sciences, Hamilton, ON, Canada
| | - Abdikarim Abdullahi
- Department of Surgery, McMaster University, Hamilton, ON, Canada
- David Braley Research Institute, C5-104, 20 Copeland Ave., Hamilton, ON, L8L 2X2, Canada
- Centre for Burn Research, Hamilton Health Sciences, Hamilton, ON, Canada
| | - Fadi Khalaf
- Department of Biochemistry, Faculty of Health Sciences, McMaster University, Hamilton, ON, Canada
- David Braley Research Institute, C5-104, 20 Copeland Ave., Hamilton, ON, L8L 2X2, Canada
- Centre for Burn Research, Hamilton Health Sciences, Hamilton, ON, Canada
| | - Dalia Barayan
- Department of Surgery, McMaster University, Hamilton, ON, Canada
- David Braley Research Institute, C5-104, 20 Copeland Ave., Hamilton, ON, L8L 2X2, Canada
- Centre for Burn Research, Hamilton Health Sciences, Hamilton, ON, Canada
| | - Lauar de Brito Monteiro
- Sunnybrook Research Institute, Toronto, ON, Canada
- Department of Surgery, McMaster University, Hamilton, ON, Canada
- David Braley Research Institute, C5-104, 20 Copeland Ave., Hamilton, ON, L8L 2X2, Canada
- Centre for Burn Research, Hamilton Health Sciences, Hamilton, ON, Canada
| | - Osai Samadi
- Sunnybrook Research Institute, Toronto, ON, Canada
- Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Graham Rix
- Sunnybrook Research Institute, Toronto, ON, Canada
- Department of Surgery, McMaster University, Hamilton, ON, Canada
- David Braley Research Institute, C5-104, 20 Copeland Ave., Hamilton, ON, L8L 2X2, Canada
- Centre for Burn Research, Hamilton Health Sciences, Hamilton, ON, Canada
| | - Marc G Jeschke
- Sunnybrook Research Institute, Toronto, ON, Canada.
- Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, ON, Canada.
- Department of Biochemistry, Faculty of Health Sciences, McMaster University, Hamilton, ON, Canada.
- Department of Surgery, McMaster University, Hamilton, ON, Canada.
- David Braley Research Institute, C5-104, 20 Copeland Ave., Hamilton, ON, L8L 2X2, Canada.
- Centre for Burn Research, Hamilton Health Sciences, Hamilton, ON, Canada.
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Chen A, Gong M, Chi J, Wang Z, Dai L. Exploring the Potential Mechanisms of the Ethyl Acetate Fraction of Hippophae rhamnoides L. Seeds as a Natural Healing Agent for Wound Repair. JOURNAL OF ETHNOPHARMACOLOGY 2024:118688. [PMID: 39142622 DOI: 10.1016/j.jep.2024.118688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 08/08/2024] [Accepted: 08/09/2024] [Indexed: 08/16/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Sea buckthorn (Hippophae rhamnoides L. ) has been designated a "medicine food homology" fruit by the National Health Commission of China due to its nutritional value. In traditional Chinese ethnomedicine, Hippophae rhamnoides L. is commonly used to treat nonhealing wounds such as burns, sores, and gastric ulcers. The aim of this study was to explore the healing effects of the ethyl acetate extract of sea buckthorn seeds (SBS-EF) on burn wounds. AIM OF THE STUDY The primary objectives of this research were to determine the most effective medicinal site of action for treating burns with sea buckthorn seeds (SBS) and to investigate the underlying material basis and mechanisms of their therapeutic effects. MATERIALS AND METHODS The effects of different components of SBS-EF on the proliferation and migration of human skin fibroblasts (HSFs) were evaluated via MTT assays, scratch assays, transwell assays, and hydroxyproline secretion analysis. SBS-EF displayed the greatest activity amongst the extracts. Subsequent analyses included network pharmacology methodology, molecular docking studies, ultraperformance liquid chromatography UPLC-Orbitrap-Exploris-120-MS and a severe second-degree burn rat model to investigate the chemical constituents and potential therapeutic mechanisms of the SBS-EF. RESULTS In vitro studies demonstrated the efficacy of SBS-EF in promoting HSF growth and migration. UPLC-Orbitrap-Exploris-120-MS analysis revealed that SBS-EF had ten major constituents, with flavonoids being the predominant compounds, especially catechin, quercetin, and kaempferol derivatives. Network pharmacology and molecular docking analyses indicated that SBS-EF may exert its healing effects by modulating the Wnt/β-catenin signalling pathway. Subsequent in vivo experiments demonstrated that SBS-EF accelerated burn wound healing in rats, increased hydroxyproline expression in skin tissue, facilitated skin structure repair, and enhanced collagen production and organisation over a 21 d period. Additionally, exposure to SBS-EF upregulated WNT3a and β-catenin while downregulating GSK-3β levels in rat skin tissue. CONCLUSIONS The wound healing properties of SBS-EF were attributed to its ability to enhance HSF growth and migration, increase hydroxyproline levels in the skin, promote collagen accumulation, reduce scarring, and decrease the skin water content. SBS-EF may also provide therapeutic benefits for burns by modulating the Wnt/β-catenin signalling pathway, as evidenced by its effective site and likely mechanism of action in the treatment of burned rats.
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Affiliation(s)
- Anying Chen
- Collaborative Innovation Center of Research and Development on the Whole Industry Chain of Yu-Yao, Henan Province, Henan University of Chinese Medicine, Henan 450046, China; Engineering Technology Research Center for Comprehensive Development and Utilization of Authentic Medicinal Materials from Henan, Henan 450046, China.
| | - Man Gong
- Collaborative Innovation Center of Research and Development on the Whole Industry Chain of Yu-Yao, Henan Province, Henan University of Chinese Medicine, Henan 450046, China; Engineering Technology Research Center for Comprehensive Development and Utilization of Authentic Medicinal Materials from Henan, Henan 450046, China.
| | - Jun Chi
- Collaborative Innovation Center of Research and Development on the Whole Industry Chain of Yu-Yao, Henan Province, Henan University of Chinese Medicine, Henan 450046, China; Engineering Technology Research Center for Comprehensive Development and Utilization of Authentic Medicinal Materials from Henan, Henan 450046, China.
| | - Zhingming Wang
- Collaborative Innovation Center of Research and Development on the Whole Industry Chain of Yu-Yao, Henan Province, Henan University of Chinese Medicine, Henan 450046, China; Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Liping Dai
- Collaborative Innovation Center of Research and Development on the Whole Industry Chain of Yu-Yao, Henan Province, Henan University of Chinese Medicine, Henan 450046, China; Engineering Technology Research Center for Comprehensive Development and Utilization of Authentic Medicinal Materials from Henan, Henan 450046, China.
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6
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Schiefer JL, Wergen NM, Grieb G, Bagheri M, Seyhan H, Badra M, Kopp M, Fuchs PC, Windolf J, Suschek CV. Experimental evidence for Parthanatos-like mode of cell death of heat-damaged human skin fibroblasts in a cell culture-based in vitro burn model. Burns 2024; 50:1562-1577. [PMID: 38570249 DOI: 10.1016/j.burns.2024.03.014] [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: 06/26/2023] [Revised: 03/06/2024] [Accepted: 03/10/2024] [Indexed: 04/05/2024]
Abstract
The cellular mechanisms of burn conversion of heat damaged tissue are center of many studies. Even if the molecular mechanisms of heat-induced cell death are controversially discussed in the current literature, it is widely accepted that caspase-mediated apoptosis plays a central role. In the current study we wanted to develop further information on the nature of the mechanism of heat-induced cell death of fibroblasts in vitro. We found that heating of human fibroblast cultures (a 10 s rise from 37 °C to 67 °C followed by a 13 s cool down to 37 °C) resulted in the death of about 50% of the cells. However, the increase in cell death started with a delay, about one hour after exposure to heat, and reached the maximum after about five hours. The lack of clear evidence for an active involvement of effector caspase in the observed cell death mechanism and the lack of observation of the occurrence of hypodiploid nuclei contradict heat-induced cell death by caspase-mediated apoptosis. Moreover, a dominant heat-induced increase in PARP1 protein expression, which correlated with a time-delayed ATP synthesis inhibition, appearance of double-strand breaks and secondary necrosis, indicate a different type of cell death than apoptosis. Indeed, increased translocation of Apoptosis Inducing Factor (AIF) and Macrophage Migration Inhibitory Factor (MIF) into cell nuclei, which correlates with the mentioned enhanced PARP1 protein expression, indicate PARP1-induced, AIF-mediated and MIF-activated cell death. With regard to the molecular actors involved, the cellular processes and temporal sequences, the mode of cell death observed in our model is very similar to the cell death mechanism via Parthanatos described in the literature.
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Affiliation(s)
- Jennifer Lynn Schiefer
- Department of Plastic Surgery, Hand Surgery, Burn Center, Merheim Hospital Cologne, University of Witten/Herdecke, Köln, Germany.
| | - Niklas M Wergen
- Department for Orthopedics and Trauma Surgery, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Germany
| | - Gerrit Grieb
- Department of Plastic Surgery and Hand Surgery, Burn Center, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - Mahsa Bagheri
- Department of Plastic Surgery, Hand Surgery, Burn Center, Merheim Hospital Cologne, University of Witten/Herdecke, Köln, Germany
| | - Harun Seyhan
- Department of Plastic Surgery, Hand Surgery, Burn Center, Merheim Hospital Cologne, University of Witten/Herdecke, Köln, Germany
| | - Maria Badra
- Department for Orthopedics and Trauma Surgery, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Germany
| | - Marco Kopp
- Department for Orthopedics and Trauma Surgery, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Germany
| | - Paul C Fuchs
- Department of Plastic Surgery, Hand Surgery, Burn Center, Merheim Hospital Cologne, University of Witten/Herdecke, Köln, Germany
| | - Joachim Windolf
- Department for Orthopedics and Trauma Surgery, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Germany
| | - Christoph V Suschek
- Department for Orthopedics and Trauma Surgery, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Germany
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7
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Govindappa PK, V G R, Ellur G, Gaber AA, Elfar J. 4-aminopyridine attenuates inflammation and apoptosis and increases angiogenesis to promote skin regeneration following a burn injury. RESEARCH SQUARE 2024:rs.3.rs-4669610. [PMID: 39149501 PMCID: PMC11326401 DOI: 10.21203/rs.3.rs-4669610/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/17/2024]
Abstract
Severe thermal skin burns are complicated by inflammation and apoptosis, which delays wound healing and contributes to significant morbidity. Diverse treatments demonstrate limited success with mitigating these processes to accelerate healing. Agents that alter cell behavior to improve healing would alter treatment paradigms. We repurposed 4-aminopyridine (4-AP), a drug approved by the US FDA for multiple sclerosis, to treat severe burns. We found that 4-AP, in the early stages of burn healing, significantly reduced the expression of pro-inflammatory cytokines IL1β and TNFα while increasing the expression of anti-inflammatory markers CD206, ARG-1, and IL10. 4-AP attenuated apoptosis, with decreases in apoptotic markers BAX, caspase-9, and caspase-3 and increases in anti-apoptotic markers BCL2 and BCL-XL. Furthermore, 4-AP promoted angiogenesis through increases in the expression of CD31, VEGF, and eNOS. Together, these likely contributed to accelerated burn wound closure, as demonstrated in increased keratinocyte proliferation (K14) and differentiation (K10) markers. In the later stages of burn healing, 4-AP increased TGFβ and FGF levels, which are known to mark the transformation of fibroblasts to myofibroblasts. This was further demonstrated by an increased expression of α-SMA and vimentin, as well as higher levels of collagen I and III, MMP 3, and 9 in animals treated with 4-AP. Our findings support the idea that 4-AP may have a novel, clinically relevant therapeutic use in promoting burn wound healing.
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8
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Sharun K, Banu SA, Mamachan M, Subash A, Karikalan M, Kumar R, Vinodhkumar OR, Dhama K, Pawde AM, Amarpal. Development and characterization of contraction-suppressed full-thickness skin wound model in rabbits. Tissue Cell 2024; 90:102482. [PMID: 39059133 DOI: 10.1016/j.tice.2024.102482] [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: 05/03/2024] [Revised: 07/03/2024] [Accepted: 07/17/2024] [Indexed: 07/28/2024]
Abstract
The wound healing process in rodents (rats and mice) and lagomorphs (rabbits) predominantly relies on wound contraction rather than re-epithelialization and granulation tissue formation. As a result, existing laboratory animal models for wound healing often fail to mimic human wound healing mechanisms accurately. This study introduces a standardized rabbit model with superior translational potential for skin wound healing research. Two full-thickness dermal wounds were created on the posterior dorsal surface of each rabbit using a standard 2 ×2 cm² template. One of these wounds was randomly selected to be treated as a contraction-suppressed wound by applying a transparent adhesive elastic bandage. At the same time, the other was retained as a standard full-thickness wound. Wound contraction was measured on 7, 14, 21, 28, and 35 days. Histomorphological evaluation was done on day 35 to evaluate the quality of wound healing. The findings indicate that transparent adhesive elastic bandage prolonged the wound healing time and suppressed wound contraction in rabbits. In addition, the healed contraction-suppressed full-thickness wounds had denser and thicker collagen fibers than the healed standard full-thickness wounds, indicating better collagen fiber deposition. Our model achieved a 100 % success rate in maintaining the transparent adhesive elastic bandage in the rabbits. Therefore, we have developed a simple, non-invasive, cost-effective method for preventing wound contraction. Further studies are required to establish the utility of this model for studying wound healing mechanisms and evaluating therapeutic interventions.
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Affiliation(s)
- Khan Sharun
- Division of Surgery, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India; Graduate Institute of Medicine, Yuan Ze University, Taoyuan 32003, Taiwan.
| | - S Amitha Banu
- Division of Surgery, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India
| | - Merlin Mamachan
- Division of Surgery, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India
| | - Athira Subash
- Division of Pathology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India
| | - Mathesh Karikalan
- Centre for Wildlife Conservation, Management and Disease Surveillance, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India
| | - Rohit Kumar
- Division of Surgery, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India
| | - Obli Rajendran Vinodhkumar
- Division of Epidemiology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India
| | - Kuldeep Dhama
- Division of Pathology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India
| | - A M Pawde
- Division of Surgery, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India.
| | - Amarpal
- Division of Surgery, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India
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9
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Qin S, Bie F, Chen S, Xu Y, Chen L, Shu B, Yang F, Lu Y, Li J, Zhao J. Targeting S100A12 to Improve Angiogenesis and Accelerate Diabetic Wound Healing. Inflammation 2024:10.1007/s10753-024-02073-8. [PMID: 38954262 DOI: 10.1007/s10753-024-02073-8] [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: 02/24/2024] [Revised: 05/31/2024] [Accepted: 06/02/2024] [Indexed: 07/04/2024]
Abstract
Long-term inflammation and impaired angiogenesis are thought to be the causes of delayed healing or nonhealing of diabetic wounds. S100A12 is an essential pro-inflammatory factor involved in inflammatory reactions and serves as a biomarker for various inflammatory diseases. However, whether high level of S100A12 exists in and affects the healing of diabetic wounds, as well as the underlying molecular mechanisms, remain unclear. In this study, we found that the serum concentration of S100A12 is significantly elevated in patients with type 2 diabetes. Exposure of stratified epidermal cells to high glucose environment led to increased expression and secretion of S100A12, resulting in impaired endothelial function by binding to the advanced glycation endproducts (RAGE) or Toll-like receptor 4 (TLR4) on endothelial cell. The transcription factor Krüpple-like Factor 5 (KLF5) is highly expressed in the epidermis under high glucose conditions, activating the transcriptional activity of the S100A12 and boost its expression. By establishing diabetic wounds model in alloxan-induced diabetic rabbit, we found that local inhibition of S100A12 significantly accelerated diabetic wound healing by promoting angiogenesis. Our results illustrated the novel endothelial-specific injury function of S100A12 in diabetic wounds and suggest that S100A12 is a potential target for the treatment of diabetic wounds.
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Affiliation(s)
- Shitian Qin
- Department of Burns, Wound Repair and Reconstruction, The First Affiliated Hospital of Sun Yat-Sen University, No. 58, Zhongshan 2 Road, Guangzhou, Guangdong Province, 510080, PR China
| | - Fan Bie
- Department of Burns, Wound Repair and Reconstruction, The First Affiliated Hospital of Sun Yat-Sen University, No. 58, Zhongshan 2 Road, Guangzhou, Guangdong Province, 510080, PR China
| | - Shuying Chen
- Department of Burns, Wound Repair and Reconstruction, The First Affiliated Hospital of Sun Yat-Sen University, No. 58, Zhongshan 2 Road, Guangzhou, Guangdong Province, 510080, PR China
| | - Yingbin Xu
- Department of Burns, Wound Repair and Reconstruction, The First Affiliated Hospital of Sun Yat-Sen University, No. 58, Zhongshan 2 Road, Guangzhou, Guangdong Province, 510080, PR China
| | - Lei Chen
- Department of Burns, Wound Repair and Reconstruction, The First Affiliated Hospital of Sun Yat-Sen University, No. 58, Zhongshan 2 Road, Guangzhou, Guangdong Province, 510080, PR China
| | - Bin Shu
- Department of Burns, Wound Repair and Reconstruction, The First Affiliated Hospital of Sun Yat-Sen University, No. 58, Zhongshan 2 Road, Guangzhou, Guangdong Province, 510080, PR China
| | - Fan Yang
- Department of Burns, Wound Repair and Reconstruction, The First Affiliated Hospital of Sun Yat-Sen University, No. 58, Zhongshan 2 Road, Guangzhou, Guangdong Province, 510080, PR China
| | - Yangzhou Lu
- Department of Burns, Wound Repair and Reconstruction, The First Affiliated Hospital of Sun Yat-Sen University, No. 58, Zhongshan 2 Road, Guangzhou, Guangdong Province, 510080, PR China
| | - Jialin Li
- Department of Intensive Care Unit, The First Affiliated Hospital of Sun Yat-Sen University, No. 58, Zhongshan 2 Road, Guangzhou, Guangdong Province, 510080, PR China
| | - Jingling Zhao
- Department of Burns, Wound Repair and Reconstruction, The First Affiliated Hospital of Sun Yat-Sen University, No. 58, Zhongshan 2 Road, Guangzhou, Guangdong Province, 510080, PR China.
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10
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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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11
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Benavides-Lara J, Siegel AP, Tsoukas MM, Avanaki K. High-frequency photoacoustic and ultrasound imaging for skin evaluation: Pilot study for the assessment of a chemical burn. JOURNAL OF BIOPHOTONICS 2024; 17:e202300460. [PMID: 38719468 DOI: 10.1002/jbio.202300460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Revised: 04/02/2024] [Accepted: 04/04/2024] [Indexed: 07/13/2024]
Abstract
Skin architecture and its underlying vascular structure could be used to assess the health status of skin. A non-invasive, high resolution and deep imaging modality able to visualize skin subcutaneous layers and vasculature structures could be useful for determining and characterizing skin disease and trauma. In this study, a multispectral high-frequency, linear array-based photoacoustic/ultrasound (PAUS) probe is developed and implemented for the imaging of rat skin in vivo. The study seeks to demonstrate the probe capabilities for visualizing the skin and its underlying structures, and for monitoring changes in skin structure and composition during a 5-day course of a chemical burn. We analayze composition of lipids, water, oxy-hemoglobin, and deoxy-hemoglobin (for determination of oxygen saturation) in the skin tissue. The study successfully demonstrated the high-frequency PAUS imaging probe was able to provide 3D images of the rat skin architecture, underlying vasculature structures, and oxygen saturation, water, lipids and total hemoglobin.
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Affiliation(s)
- Juliana Benavides-Lara
- The Richard and Loan Hill Department of Biomedical Engineering, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Amanda P Siegel
- The Richard and Loan Hill Department of Biomedical Engineering, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Maria M Tsoukas
- Department of Dermatology, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Kamran Avanaki
- The Richard and Loan Hill Department of Biomedical Engineering, University of Illinois at Chicago, Chicago, Illinois, USA
- Department of Dermatology, University of Illinois at Chicago, Chicago, Illinois, USA
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12
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Al-Sobayil FA, Alsupail MM, Tharwat M. Effect of pomegranate peel with/without autologous bone marrow on healing of acute cutaneous wounds in alloxan-induced diabetic rabbits. Open Vet J 2024; 14:1358-1369. [PMID: 39055750 PMCID: PMC11268910 DOI: 10.5455/ovj.2024.v14.i6.4] [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: 02/02/2024] [Accepted: 05/21/2024] [Indexed: 07/27/2024] Open
Abstract
Background Healing of bum wounds is commonly associated with many complications. Every year various new repair materials are developed and experimentally used for treating burn wounds. Humans with diabetes mellitus usually suffer from chronic wound healing. Vascular, neuropathic, immune function, and biochemical abnormalities each contribute to the altered tissue repair. One underlying factor that accompanies all diabetic ulcerations is poor vascular flow, a circumstance that impedes proper wound healing. Numerous studies have highlighted the importance of adequate vascular sufficiency and vessel proliferation in tissue repair and the lack thereof in diabetic wound healing. Other studies have looked at whether disarrayed capillary remodeling and maturation of vessels might play a role in impaired diabetic wound healing. Aim This investigation has been planned to report the influence of treatment with a mixture of both the powder of pomegranate peel (PP) accompanied with an autologous bone marrow (BM) on the cure of burn injuries in experimentally induced diabetic rabbits. Methods Alloxan monohydrate has been applied to create diabetes in 50 rabbits. Then in each rabbit, two deep second-degree burn wounds were experimentally created. The animals were then divided randomly into 5 treatment sections: non-treatment controls (C1), treated with an available commercial powder for wound (C2), treatment with powder of PP, treatment with alone BM, and the final group treated with PP powder with bone marrow (PPBM). The speed of wound closure and the histopathological changes during healing were measured. The levels of the biomarkers of rabbit platelet-derived growth factor AA (PDGF-AA) and rabbit protease-activated receptor 1 (PAR-1) were measured on days 0, 4, 8, and 12. Results Wound healing was markedly more rapid in all the treatment groups versus the control non-treated group. Interestingly, a rapid wound cure was significantly observed in the PPBM group versus the other treatment ones. The histological assessment clarified a significant elevation in the fibroblast and collagen scores in the PPBM group versus the other sections. In addition, there were significant increases in the serum levels of the biomarkers PDGF-AA and PAR-1 among groups. Conclusion Dependent on the results of current research, it can be concluded that both PP powder with BM PPBM significantly accelerate the healing process of burn wounds in experimentally induced diabetic rabbits.
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Affiliation(s)
- Fahd A. Al-Sobayil
- Department of Clinical Sciences, College of Veterinary Medicine, Qassim University, Buraidah, Saudi Arabia
| | | | - Mohamed Tharwat
- Department of Clinical Sciences, College of Veterinary Medicine, Qassim University, Buraidah, Saudi Arabia
- Department of Animal Medicine, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
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13
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Liu A, Cheong JZA, Hassan S, Wielgat MB, Meudt JJ, Townsend EC, Shanmuganayagam D, Kalan LR, Gibson A. The effect of anatomic location on porcine models of burn injury and wound healing. Wound Repair Regen 2024. [PMID: 38775411 DOI: 10.1111/wrr.13190] [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: 12/20/2023] [Revised: 04/04/2024] [Accepted: 05/07/2024] [Indexed: 08/22/2024]
Abstract
Porcine models are frequently used for burn healing studies; however, factors including anatomic location and lack of standardised wound methods can impact the interpretation of wound data. The objectives of this study are to examine the influence of anatomical locations on the uniformity of burn creation and healing in porcine burn models. To optimise burn parameters on dorsal and ventral surfaces, ex vivo and in situ euthanized animals were first used to examine the location-dependence of the burn depth and contact time relationship. The location-dependent healing in vivo was then examined using burn and excisional wounds at dorsal, ventral, caudal and cranial locations. Lactate dehydrogenase (LDH) and H&E were used to assess burn depth and wound re-epithelialization. We found that burn depth on the ventral skin was significantly deeper than that of the dorsal skin at identical thermal conditions. Compared with burns created ex vivo, burns created in situ immediately post-mortem were significantly deeper in the ventral location. In live animals, 2 out of 12 burn wounds were fully re-epithelialized after 14 days in contrast to complete re-epithelialization of all excisional wounds. Among the burn wounds, those at the cranial-dorsal site exhibited faster healing than at the caudal-dorsal site. This study showed that anatomical location is an important consideration for the consistency of burn depth creation and healing. These data support symmetric localization of treatment and control for comparative assessment of burn healing in porcine models to prevent misinterpretation of results and increase the translatability of findings to humans.
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Affiliation(s)
- Aiping Liu
- Department of Surgery, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - J Z Alex Cheong
- Department of Medical Microbiology & Immunology, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Sameeha Hassan
- Department of Surgery, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Matthew B Wielgat
- Department of Animal & Dairy Sciences, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Jennifer J Meudt
- Department of Animal & Dairy Sciences, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Elizabeth Catherine Townsend
- Department of Medical Microbiology & Immunology, University of Wisconsin-Madison, Madison, Wisconsin, USA
- Medical Scientist Training Program, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Dhanansayan Shanmuganayagam
- Department of Surgery, University of Wisconsin-Madison, Madison, Wisconsin, USA
- Department of Animal & Dairy Sciences, University of Wisconsin-Madison, Madison, Wisconsin, USA
- Center for Biomedical Swine Research & Innovation, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Lindsay R Kalan
- Department of Medical Microbiology & Immunology, University of Wisconsin-Madison, Madison, Wisconsin, USA
- Department of Biochemistry and Biomedical Sciences, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Angela Gibson
- Department of Surgery, University of Wisconsin-Madison, Madison, Wisconsin, USA
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14
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Ruvalcaba-Delgadillo Y, Martínez-Fernández DE, Luquin S, Moreno-Alcázar A, Redolar-Ripoll D, Jauregui-Huerta F, Fernández-Quezada D. Visual EMDR stimulation mitigates acute varied stress effects on morphology of hippocampal neurons in male Wistar rats. Front Psychiatry 2024; 15:1396550. [PMID: 38803673 PMCID: PMC11129278 DOI: 10.3389/fpsyt.2024.1396550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Accepted: 04/23/2024] [Indexed: 05/29/2024] Open
Abstract
Introduction Stress is a pervasive health concern known to induce physiological changes, particularly impacting the vulnerable hippocampus and the morphological integrity of its main residing cells, the hippocampal neurons. Eye Movement Desensitization and Reprocessing (EMDR), initially developed to alleviate emotional distress, has emerged as a potential therapeutic/preventive intervention for other stress-related disorders. This study aimed to investigate the impact of Acute Variable Stress (AVS) on hippocampal neurons and the potential protective effects of EMDR. Methods Rats were exposed to diverse stressors for 7 days, followed by dendritic morphology assessment of hippocampal neurons using Golgi-Cox staining. Results AVS resulted in significant dendritic atrophy, evidenced by reduced dendritic branches and length. In contrast, rats receiving EMDR treatment alongside stress exposure exhibited preserved dendritic morphology comparable to controls, suggesting EMDR's protective role against stressinduced dendritic remodeling. Conclusions These findings highlight the potential of EMDR as a neuroprotective intervention in mitigating stress-related hippocampal alterations.
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Affiliation(s)
- Yaveth Ruvalcaba-Delgadillo
- Neuroscience Department, University Center of Health Sciences, University of Guadalajara, Guadalajara, Jalisco, Mexico
| | | | - Sonia Luquin
- Neuroscience Department, University Center of Health Sciences, University of Guadalajara, Guadalajara, Jalisco, Mexico
| | - Ana Moreno-Alcázar
- ISOMAE Institute of Neurosciences and Psychosomatic Psychology, Sant Cugat del Vallés, Spain. Centre Fòrum Research Unit, Hospital del Mar, Barcelona, Spain
| | | | - Fernando Jauregui-Huerta
- Laboratorio de Fisiología del Comportamiento, Departamento de Fisiología, Facultad de medicina, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - David Fernández-Quezada
- Neuroscience Department, University Center of Health Sciences, University of Guadalajara, Guadalajara, Jalisco, Mexico
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15
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Zuniga K, Ghousifam N, Shaffer L, Brocklehurst S, Van Dyke M, Christy R, Natesan S, Rylander MN. Development of a Static Avascular and Dynamic Vascular Human Skin Equivalent Employing Collagen/Keratin Hydrogels. Int J Mol Sci 2024; 25:4992. [PMID: 38732209 PMCID: PMC11084893 DOI: 10.3390/ijms25094992] [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: 03/31/2024] [Revised: 04/26/2024] [Accepted: 04/29/2024] [Indexed: 05/13/2024] Open
Abstract
One of the primary complications in generating physiologically representative skin tissue is the inability to integrate vasculature into the system, which has been shown to promote the proliferation of basal keratinocytes and consequent keratinocyte differentiation, and is necessary for mimicking representative barrier function in the skin and physiological transport properties. We created a 3D vascularized human skin equivalent (VHSE) with a dermal and epidermal layer, and compared keratinocyte differentiation (immunomarker staining), epidermal thickness (H&E staining), and barrier function (transepithelial electrical resistance (TEER) and dextran permeability) to a static, organotypic avascular HSE (AHSE). The VHSE had a significantly thicker epidermal layer and increased resistance, both an indication of increased barrier function, compared to the AHSE. The inclusion of keratin in our collagen hydrogel extracellular matrix (ECM) increased keratinocyte differentiation and barrier function, indicated by greater resistance and decreased permeability. Surprisingly, however, endothelial cells grown in a collagen/keratin extracellular environment showed increased cell growth and decreased vascular permeability, indicating a more confluent and tighter vessel compared to those grown in a pure collagen environment. The development of a novel VHSE, which incorporated physiological vasculature and a unique collagen/keratin ECM, improved barrier function, vessel development, and skin structure compared to a static AHSE model.
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Affiliation(s)
- Kameel Zuniga
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, USA;
- 59th Medical Wing Science and Technology, JBSA-Lackland, TX 78236, USA;
| | - Neda Ghousifam
- Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712, USA;
| | - Lucy Shaffer
- 59th Medical Wing Science and Technology, JBSA-Lackland, TX 78236, USA;
| | - Sean Brocklehurst
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, USA;
| | - Mark Van Dyke
- Department of Biomedical Engineering, The University of Arizona, Tucson, AZ 85712, USA;
| | - Robert Christy
- Military Health Institute, University of Texas Health San Antonio, San Antonio, TX 78229, USA;
| | - Shanmugasundaram Natesan
- Extremity Trauma and Amputation Center of Excellence (EACE), Defense Health Agency, San Diego, CA 92134, USA;
| | - Marissa Nichole Rylander
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, USA;
- Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712, USA;
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16
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Angilia C, Sary NL, Indah R, Suryawati S, Farsa BS, Zeir HA, Fajri F, Husna F. Wound healing effect of nutmeg ( Myristica fragrans) cream on second-degree burn in animal model. NARRA J 2024; 4:e621. [PMID: 38798873 PMCID: PMC11125405 DOI: 10.52225/narra.v4i1.621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 02/25/2024] [Indexed: 05/29/2024]
Abstract
Second-degree burn, the most common among burn degrees, underscores the importance of timely and proper treatment in influencing prognosis. Nutmeg (Myristica fragrans), renowned for its potent antibacterial and antifungal properties, also serves as an effective antiseptic for open wounds. The aim of this study was to identify the phytochemical constituents of nutmeg essential oil and analyze the wound healing effect of nutmeg cream on second-degree burns in an animal model. An experimental study with a completed randomized design was conducted on Rattus norvegicus strain Wistar rats with second-degree burn. This study had four groups and each group consisting of four rats: B (burn-treated base cream), B+N (burn-treated 3% nutmeg cream), B+SSD (burn-treated silver sulfadiazine (BSS)), and B+N+SSD (burn-treated 3% nutmeg cream and SSD in a 1:1 ratio). The phytochemical analysis of nutmeg essential oil was conducted by gas chromatography and mass spectroscopy (GC-MS). The burn diameter and burn wound healing percentage were measured from day 0 to 18. One-way ANOVA followed by post hoc analysis using the least significant difference (LSD) was employed to analysis the effect. The phytochemical analysis of nutmeg essential oil found that myristicin, terpinene-4-ol, terpinene, safrole and terpinolene were the most abundant putative compounds in nutmeg essential oil. On day 0, the average burn wound diameters were 1.4 cm in all groups and increases were observed in all groups on day 3. The wound diameter decreased until day 18 with the smallest burn wound diameter was found in the B+N group (0.86±0.37 cm), followed by B+SSD (0.93±0.29 cm). The B+SSD group exhibited the highest percentage of burn wound healing (56.80±14.05%), which was significantly different from the base cream (p<0.05). The percentage of burn wound healing in rats given 3% nutmeg cream was 41.88±13.81%, suggesting that nutmeg cream could promote burn wound healing in rats induced by second-degree burns.
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Affiliation(s)
- Ciecielia Angilia
- Master of Biomedical Science, Faculty of Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia
| | - Nirwana L. Sary
- Department of Physiology, Faculty of Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia
| | - Rosaria Indah
- Department of Anatomy, Faculty of Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia
| | - Suryawati Suryawati
- Department of Pharmacology, Faculty of Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia
| | - Bianda S. Farsa
- Faculty of Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia
| | - Haya A. Zeir
- Faculty of Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia
| | - Fauzan Fajri
- Department of Physiology, Faculty of Veterinary Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia
| | - Fauzul Husna
- Department of Pharmacology, Faculty of Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia
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17
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Jibing C, Weiping L, Yuwei Y, Bingzheng F, Zhiran X. Exosomal microRNA-Based therapies for skin diseases. Regen Ther 2024; 25:101-112. [PMID: 38178928 PMCID: PMC10765304 DOI: 10.1016/j.reth.2023.12.005] [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: 08/09/2023] [Revised: 12/08/2023] [Accepted: 12/17/2023] [Indexed: 01/06/2024] Open
Abstract
Based on engineered cell/exosome technology and various skin-related animal models, exosomal microRNA (miRNA)-based therapies derived from natural exosomes have shown good therapeutic effects on nine skin diseases, including full-thickness skin defects, diabetic ulcers, skin burns, hypertrophic scars, psoriasis, systemic sclerosis, atopic dermatitis, skin aging, and hair loss. Comparative experimental research showed that the therapeutic effect of miRNA-overexpressing exosomes was better than that of their natural exosomes. Using a dual-luciferase reporter assay, the targets of all therapeutic miRNAs in skin cells have been screened and confirmed. For these nine types of skin diseases, a total of 11 animal models and 21 exosomal miRNA-based therapies have been developed. This review provides a detailed description of the animal models, miRNA therapies, disease evaluation indicators, and treatment results of exosomal miRNA therapies, with the aim of providing a reference and guidance for future clinical trials. There is currently no literature on the merits or drawbacks of miRNA therapies compared with standard treatments.
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Affiliation(s)
| | | | | | - Feng Bingzheng
- Ruikang Hospital Affiliated to Guangxi University of Chinese Medicine, Nanning, Guangxi, China
| | - Xu Zhiran
- Ruikang Hospital Affiliated to Guangxi University of Chinese Medicine, Nanning, Guangxi, China
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18
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Cabello-Arista B, Melgarejo-Ramírez Y, Retana-Flores A, Martínez-López V, Márquez-Gutiérrez E, Almanza-Pérez J, Lecona H, Reyes-Frías ML, Ibarra C, Martínez-Pardo ME, Velasquillo C, Sánchez-Sánchez R. Effects of mesenchymal stem cell culture on radio sterilized human amnion or radio sterilized pig skin in burn wound healing. Cell Tissue Bank 2024; 25:255-267. [PMID: 35059955 DOI: 10.1007/s10561-021-09976-y] [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: 04/17/2020] [Accepted: 11/02/2021] [Indexed: 11/29/2022]
Abstract
Deep second and third degree burns treatment requires fibroblasts, keratinocytes and other skin cells in order to grow new dermis and epidermis. Cells can proliferate, secrete growth factors and extracellular matrix required to repair the damaged tissue. Radiosterilized human amnion and radiosterilized pig skin have been used as natural origin skin dressings for burned patients. Adipose-derived mesenchymal stem cells can differentiate into fibroblasts and keratinocytes and improve wound-healing progress. These cells can stimulate vascular tissue formation, release growth factors, synthetize new extracellular matrix and immunoregulate other cells. In this study, we developed mesenchymal stem cells-cellularized skin substitutes based from radiosterilized human amnion or pig skin. Third-degree burns were induced in mice animal models to evaluate the effect of cellularized skin substitutes on burn wound healing. Mesenchymal phenotype was immunophenotypically confirmed by flow cytometry and cell viability was close to 100%. Skin recovery was evaluated in burned mice after seven and fourteen days post-coverage with cellularized and non-cellularized sustitutes. Histological techniques and immunofluorescence were used to evaluate re-epithelization and type I collagen deposition. We determined that cellularized-human amnion or cellularized-pig skin in combination with mesenchymal stem cells improve extracellular matrix deposition. Both cellularized constructs increase detection of type I collagen in newly formed mouse skin and can be potentially used as skin coverage for further clinical treatment of burned patients.
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Affiliation(s)
- B Cabello-Arista
- Laboratorio de Biotecnología, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Calzada México-Xochimilco No. 289, Col. Arenal de Guadalupe, C.P. 14389, Mexico City, Mexico
| | - Y Melgarejo-Ramírez
- Laboratorio de Biotecnología, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Calzada México-Xochimilco No. 289, Col. Arenal de Guadalupe, C.P. 14389, Mexico City, Mexico
| | - A Retana-Flores
- Unidad de Ingeniería de Tejidos, Terapia Celular y Medicina Regenerativa, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Calzada México-Xochimilco No. 289, Col. Arenal de Guadalupe, C.P. 14389, Mexico City, Mexico
| | - V Martínez-López
- Unidad de Ingeniería de Tejidos, Terapia Celular y Medicina Regenerativa, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Calzada México-Xochimilco No. 289, Col. Arenal de Guadalupe, C.P. 14389, Mexico City, Mexico
| | - E Márquez-Gutiérrez
- Laboratorio de Biotecnología, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Calzada México-Xochimilco No. 289, Col. Arenal de Guadalupe, C.P. 14389, Mexico City, Mexico
| | - J Almanza-Pérez
- Laboratorio de Farmacología, Depto. Ciencias de la Salud, D.C.B.S.,, Universidad Autónoma Metropolitana-Iztapalapa, C.P. 09340, Mexico City, Mexico
| | - H Lecona
- Bioterio y Cirugía Experimental, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Calzada México-Xochimilco No. 289, Col. Arenal de Guadalupe, C.P. 14389, Mexico City, Mexico
| | - M L Reyes-Frías
- Banco de Tejidos Radioesterilizados, Instituto Nacional de Investigaciones Nucleares (BTR-ININ), Carretera México-Toluca S/N La Marquesa, C.P. 52750, Ocoyoacac, Edo. Mex, Mexico
| | - C Ibarra
- Unidad de Ingeniería de Tejidos, Terapia Celular y Medicina Regenerativa, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Calzada México-Xochimilco No. 289, Col. Arenal de Guadalupe, C.P. 14389, Mexico City, Mexico
| | - M E Martínez-Pardo
- Banco de Tejidos Radioesterilizados, Instituto Nacional de Investigaciones Nucleares (BTR-ININ), Carretera México-Toluca S/N La Marquesa, C.P. 52750, Ocoyoacac, Edo. Mex, Mexico
| | - C Velasquillo
- Laboratorio de Biotecnología, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Calzada México-Xochimilco No. 289, Col. Arenal de Guadalupe, C.P. 14389, Mexico City, Mexico
| | - R Sánchez-Sánchez
- Unidad de Ingeniería de Tejidos, Terapia Celular y Medicina Regenerativa, Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra, Calzada México-Xochimilco No. 289, Col. Arenal de Guadalupe, C.P. 14389, Mexico City, Mexico.
- Escuela de Ingeniería y Ciencias, Departamento de Bioingeniería, Instituto Tecnológico de Monterrey, Puente 222, Col. Arboledas del Sur, C.P. 14380, Mexico City, Mexico.
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Mulder PPG, Hooijmans CR, Vlig M, Middelkoop E, Joosten I, Koenen HJPM, Boekema BKHL. Kinetics of Inflammatory Mediators in the Immune Response to Burn Injury: Systematic Review and Meta-Analysis of Animal Studies. J Invest Dermatol 2024; 144:669-696.e10. [PMID: 37806443 DOI: 10.1016/j.jid.2023.09.269] [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: 05/25/2023] [Revised: 08/31/2023] [Accepted: 09/20/2023] [Indexed: 10/10/2023]
Abstract
Burns are often accompanied by a dysfunctional immune response, which can lead to systemic inflammation, shock, and excessive scarring. The objective of this study was to provide insight into inflammatory pathways associated with burn-related complications. Because detailed information on the various inflammatory mediators is scattered over individual studies, we systematically reviewed animal experimental data for all reported inflammatory mediators. Meta-analyses of 352 studies revealed a strong increase in cytokines, chemokines, and growth factors, particularly 19 mediators in blood and 12 in burn tissue. Temporal kinetics showed long-lasting surges of proinflammatory cytokines in blood and burn tissue. Significant time-dependent effects were seen for IL-1β, IL-6, TGF-β1, and CCL2. The response of anti-inflammatory mediators was limited. Burn technique had a profound impact on systemic response levels. Large burn size and scalds further increased systemic, but not local inflammation. Animal characteristics greatly affected inflammation, for example, IL-1β, IL-6, and TNF-α levels were highest in young, male rats. Time-dependent effects and dissimilarities in response demonstrate the importance of appropriate study design. Collectively, this review presents a general overview of the burn-induced immune response exposing inflammatory pathways that could be targeted through immunotherapy for burn patients and provides guidance for experimental set-ups to advance burn research.
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Affiliation(s)
- Patrick P G Mulder
- Preclinical Research, Association of Dutch Burn Centres (ADBC), Beverwijk, The Netherlands; Laboratory of Medical Immunology, Department of Laboratory Medicine, Radboud University Medical Center, Nijmegen, The Netherlands.
| | - Carlijn R Hooijmans
- Meta-Research Team, Department of Anesthesiology, Pain and Palliative Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Marcel Vlig
- Preclinical Research, Association of Dutch Burn Centres (ADBC), Beverwijk, The Netherlands
| | - Esther Middelkoop
- Preclinical Research, Association of Dutch Burn Centres (ADBC), Beverwijk, The Netherlands; Department of Plastic, Reconstructive and Hand Surgery, Amsterdam UMC location Vrije Universiteit Amsterdam, Amsterdam, The Netherlands; Tissue Function and Regeneration, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Irma Joosten
- Laboratory of Medical Immunology, Department of Laboratory Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Hans J P M Koenen
- Laboratory of Medical Immunology, Department of Laboratory Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Bouke K H L Boekema
- Preclinical Research, Association of Dutch Burn Centres (ADBC), Beverwijk, The Netherlands; Department of Plastic, Reconstructive and Hand Surgery, Amsterdam UMC location Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
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Mosaddad SA, Hussain A, Tebyaniyan H. Exploring the Use of Animal Models in Craniofacial Regenerative Medicine: A Narrative Review. TISSUE ENGINEERING. PART B, REVIEWS 2024; 30:29-59. [PMID: 37432898 DOI: 10.1089/ten.teb.2023.0038] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/13/2023]
Abstract
The craniofacial region contains skin, bones, cartilage, the temporomandibular joint (TMJ), teeth, periodontal tissues, mucosa, salivary glands, muscles, nerves, and blood vessels. Applying tissue engineering therapeutically helps replace lost tissues after trauma or cancer. Despite recent advances, it remains essential to standardize and validate the most appropriate animal models to effectively translate preclinical data to clinical situations. Therefore, this review focused on applying various animal models in craniofacial tissue engineering and regeneration. This research was based on PubMed, Scopus, and Google Scholar data available until January 2023. This study included only English-language publications describing animal models' application in craniofacial tissue engineering (in vivo and review studies). Study selection was based on evaluating titles, abstracts, and full texts. The total number of initial studies was 6454. Following the screening process, 295 articles remained on the final list. Numerous in vivo studies have shown that small and large animal models can benefit clinical conditions by assessing the efficacy and safety of new therapeutic interventions, devices, and biomaterials in animals with similar diseases/defects to humans. Different species' anatomical, physiologic, and biological features must be considered in developing innovative, reproducible, and discriminative experimental models to select an appropriate animal model for a specific tissue defect. As a result, understanding the parallels between human and veterinary medicine can benefit both fields.
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Affiliation(s)
- Seyed Ali Mosaddad
- Student Research Committee, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Ahmed Hussain
- School of Dentistry, Edmonton Clinic Health Academy, University of Alberta, Edmonton, Canada
| | - Hamid Tebyaniyan
- Department of Science and Research, Islimic Azade University, Tehran, Iran
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Wang J, Gao M, Cheng M, Luo J, Lu M, Xing X, Sun Y, Lu Y, Li X, Shi C, Wang J, Wang N, Yang W, Jiang Y, Huang H, Yang G, Zeng Y, Wang C, Cao X. Single-Cell Transcriptional Analysis of Lamina Propria Lymphocytes in the Jejunum Reveals Innate Lymphoid Cell-like Cells in Pigs. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2024; 212:130-142. [PMID: 37975680 DOI: 10.4049/jimmunol.2300463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 10/20/2023] [Indexed: 11/19/2023]
Abstract
Pigs are the most suitable model to study various therapeutic strategies and drugs for human beings, although knowledge about cell type-specific transcriptomes and heterogeneity is poorly available. Through single-cell RNA sequencing and flow cytometry analysis of the types in the jejunum of pigs, we found that innate lymphoid cells (ILCs) existed in the lamina propria lymphocytes (LPLs) of the jejunum. Then, through flow sorting of live/dead-lineage (Lin)-CD45+ cells and single-cell RNA sequencing, we found that ILCs in the porcine jejunum were mainly ILC3s, with a small number of NK cells, ILC1s, and ILC2s. ILCs coexpressed IL-7Rα, ID2, and other genes and differentially expressed RORC, GATA3, and other genes but did not express the CD3 gene. ILC3s can be divided into four subgroups, and genes such as CXCL8, CXCL2, IL-22, IL-17, and NCR2 are differentially expressed. To further detect and identify ILC3s, we verified the classification of ILCs in the porcine jejunum subgroup and the expression of related hallmark genes at the protein level by flow cytometry. For systematically characterizing ILCs in the porcine intestines, we combined our pig ILC dataset with publicly available human and mice ILC data and identified that the human and pig ILCs shared more common features than did those mouse ILCs in gene signatures and cell states. Our results showed in detail for the first time (to our knowledge) the gene expression of porcine jejunal ILCs, the subtype classification of ILCs, and the markers of various ILCs, which provide a basis for an in-depth exploration of porcine intestinal mucosal immunity.
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Affiliation(s)
- Junhong Wang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China; and Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Ming Gao
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China; and Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Mingyang Cheng
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China; and Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Jiawei Luo
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China; and Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Mei Lu
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China; and Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Xinyuan Xing
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China; and Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Yu Sun
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China; and Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Yiyuan Lu
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China; and Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Xiaoxu Li
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China; and Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Chunwei Shi
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China; and Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Jianzhong Wang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China; and Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Nan Wang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China; and Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Wentao Yang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China; and Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Yanlong Jiang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China; and Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Haibin Huang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China; and Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Guilian Yang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China; and Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Yan Zeng
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China; and Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Chunfeng Wang
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China; and Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
| | - Xin Cao
- College of Veterinary Medicine, Jilin Agricultural University, Changchun, China; Jilin Provincial Key Laboratory of Animal Microecology and Healthy Breeding, Jilin Agricultural University, Changchun, China; Jilin Provincial Engineering Research Center of Animal Probiotics, Jilin Agricultural University, Changchun, China; and Key Laboratory of Animal Production and Product Quality Safety of Ministry of Education, Jilin Agricultural University, Changchun, China
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Mohamed OM, ElBaz GA, Hegazy EM, Helmy YS. Effect of Nigella sativa Versus Wheat Germ Oil on the Healing of Traumatic Ulcers in Albino Rats. Cureus 2024; 16:e52432. [PMID: 38371095 PMCID: PMC10869994 DOI: 10.7759/cureus.52432] [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] [Accepted: 01/17/2024] [Indexed: 02/20/2024] Open
Abstract
BACKGROUND AND OBJECTIVE Nigella sativa (NS) oil has been used as an ointment for relief from abscesses, nasal ulcers, orchitis, eczema, and swollen joints. The nutritional and biological values of wheat germ oil (WGO) are imperative points for testing its wound healing properties in traumatic ulcer. The aim of the study was to evaluate and compare the ability of NS versus WGO in promoting the healing of induced traumatic ulcer in albino rats clinically and histologically. MATERIALS AND METHODS This study was carried out after the approval of the Research Ethics Committee (REC) of the Faculty of Dentistry, Suez Canal University, in Ismailia, Egypt, on 60 albino rats with induced labial ulcer according to calculated sample size. All animals were anaesthetized with an intraperitoneal injection of 10% ketamine. The ulcer was produced on the labial mucosa corresponding to the midline between the lower two incisors of each rat. After induction of the ulcer, rats were randomly divided into four groups according to the treatment medicament: Group A (negative control group): 15 rats which remained without treatment; Group B (positive control): 15 rats which received daily a topical application of 1 ml of cetylpyridinium chloride (CPC) and lidocaine gel; Group C (NS group): 15 rats which received a daily topical application of 1 mm of NS oil painted by a brush covering the whole area of the ulcer; and Group D (WGO group): 15 rats which received 1 mm of WGO. The ulcers were measured using a digital caliper and were recorded using a digital camera at days 0, 3, 7, and 9, the largest (D) and smallest (d) diameters of the lesion were recorded, and the ulcer area was calculated using the following formula: A=π×D/2×d/2. Tissue samples were taken for histological examination, and the labial mucosa was dissected out and embedded in paraffin wax blocks. The blocks were cut with microtome to obtain sections of 4-5 μm thickness to be stained with hematoxylin and eosin stain and Masson's trichrome stain. All sections were examined under a light microscope, and the presence of inflammatory cells and collagen tissue remodeling were evaluated. RESULTS Within the control group, there are statistically non-significant changes in the mean of the surface area of ulcer when comparing changes in 10 rats who survived till the seventh day and inflammatory cell count when comparing changes in five rats who were sacrificed at the seventhday. There was a significant decrease in surface area and inflammatory cell count in five rats who survived till the ninth day. Within the WGO group only, all survived rats had healed ulcer at the ninth day. There is a significant decrease in inflammatory cell count in five rats who survived till the ninth day. CONCLUSION WGO was significantly more effective in the treatment of animal-induced ulcer compared to NS oil or CPC and lidocaine oral gel.
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Affiliation(s)
- Omar M Mohamed
- Pediatric and Preventive Dentistry and Dental Public Health Department, Faculty of Dentistry, Suez Canal University, Ismailia, EGY
| | - Ghada A ElBaz
- Pediatric and Preventive Dentistry and Dental Public Health Department, Faculty of Dentistry, Suez Canal University, Ismailia, EGY
| | - Enas M Hegazy
- Oral Biology Department, Faculty of Dentistry, Suez Canal University, Ismailia, EGY
| | - Yousra S Helmy
- Pediatric and Preventive Dentistry and Dental Public Health Department, Faculty of Dentistry, Suez Canal University, Ismailia, EGY
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Amorim FCM, Arisawa EÂL, Sant’anna LB, Rodrigues ABM, Costa DR. Estudo pré-clínico de queimaduras experimentais tratadas com fotobiomodulação e membrana amniótica humana, isoladas e associadas. Rev Lat Am Enfermagem 2023. [DOI: 10.1590/1518-8345.5552.3727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023] Open
Abstract
Resumo Objetivo: avaliar o efeito da fotobiomodulação com laser de baixa intensidade 660 nm isoladamente ou associada à membrana amniótica humana no reparo de queimaduras de espessura parcial em ratos. Método: estudo experimental com 48 ratos Wistar machos, randomizados em quatro grupos: Controle, Membrana Amniótica Humana, Terapia a Laser de Baixa Intensidade e Terapia a Laser de Baixa Intensidade associado à Membrana Amniótica Humana. As características histopatológicas das amostras de pele foram analisadas aos 7 e 14 dias após a queimadura. Os dados obtidos foram submetidos aos testes de Kolmogorov-Smirnov e Mann Whitney. Resultados: a análise histológica das lesões por queimadura mostrou a diminuição da inflamação (p <0,0001) e aumento da proliferação de fibroblastos (p <0,0001), principalmente nos 7 dias em todos os tratamentos relacionados ao grupo controle. Aos 14 dias, a maior efetividade na aceleração do processo cicatricial foi significativa (p<0,0001) no grupo Terapia a Laser de Baixa Intensidade associado à Membrana Amniótica Humana. Conclusão: a associação das terapias de fotobiomodulação à membrana amniótica humana permitiu comprovar redução no tempo do processo cicatricial das lesões experimentais, estimulando sua proposição como protocolo de tratamento em queimaduras de espessura parcial.
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Amorim FCM, Arisawa EÂL, Sant’anna LB, Rodrigues ABM, Costa DR. Estudio preclínico de quemaduras experimentales tratadas con fotobiomodulación y membrana amniótica humana, solas y combinadas. Rev Lat Am Enfermagem 2023. [DOI: 10.1590/1518-8345.5552.3725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023] Open
Abstract
Resumen Objetivo: evaluar el efecto de la fotobiomodulación con láser de baja intensidad 660 nm de sola o combinada con la membrana amniótica humana en la reparación de quemaduras de espesor parcial en ratas. Método: estudio experimental con 48 ratas Wistar macho, aleatorizadas en cuatro grupos: Control, Membrana Amniótica Humana, Terapia con Láser de Baja Intensidad y Terapia con Láser de Baja Intensidad combinada con la Membrana Amniótica Humana. Las características histopatológicas de las muestras de piel fueron analizadas a los 7 y 14 días después de la quemadura. Los datos obtenidos fueron sometidos a las pruebas de Kolmogorov-Smirnov y Mann-Whitney. Resultados: el análisis histológico de las lesiones por quemadura mostró una disminución de la inflamación (p <0,0001) y un aumento de la proliferación de fibroblastos (p <0,0001) principalmente a los 7 días en todos los tratamientos en comparación con el grupo control; a los 14 días, en el grupo de Terapia con Láser de Baja Intensidad combinada con la Membrana Amniótica Humana la mayor efectividad en la aceleración del proceso de cicatrización fue significativa (p<0,0001). Conclusión: la asociación de terapias de fotobiomodulación con la membrana amniótica humana permitió comprobar que hubo una reducción en el tiempo del proceso de cicatrización de lesiones experimentales, lo cual favorece que se proponga como protocolo de tratamiento en quemaduras de espesor parcial.
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Moon AY, Bailey EJ, Polanco JA, Kurata WE, Pierce LM. Antibacterial Efficacy of a Chitosan-Based Hydrogel Modified With Epsilon-Poly-l-Lysine Against Pseudomonas aeruginosa in a Murine-Infected Burn Wound Model. Mil Med 2023; 188:52-60. [PMID: 37948238 DOI: 10.1093/milmed/usad013] [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: 10/04/2022] [Revised: 01/03/2023] [Accepted: 01/09/2023] [Indexed: 11/12/2023] Open
Abstract
INTRODUCTION Because antibiotic resistance is increasing worldwide and the leading cause of death in burn patients is an infection, an urgent need exists for nonantibiotic approaches to eliminate multidrug-resistant bacteria from burns to prevent their systemic dissemination and sepsis. We previously demonstrated the significant antibiofilm activity of a chitosan (CS) hydrogel containing the antimicrobial peptide epsilon-poly-l-lysine (EPL) against multidrug-resistant Pseudomonas aeruginosa using ex vivo porcine skin. In this study, we evaluated the in vivo antibacterial efficacy of a CS/EPL hydrogel against P. aeruginosa in a murine burn wound infection model. MATERIALS AND METHODS Full-thickness burns were created on the dorsum using a heated brass rod and were inoculated with bioluminescent, biofilm-forming P. aeruginosa (Xen41). Mice were treated with CS/EPL, CS, or no hydrogel applied topically 2 or 24 hours after inoculation to assess the ability to prevent or eradicate existing biofilms, respectively. Dressing changes occurred daily for 3 days, and in vivo bioluminescence imaging was performed to detect and quantitate bacterial growth. Blood samples were cultured to determine systemic infection. In vitro antibacterial activity and cytotoxicity against human primary dermal fibroblasts, keratinocytes, and mesenchymal stem cells were also assessed. RESULTS CS/EPL treatment initiated at early or delayed time points showed a significant reduction in bioluminescence imaging signal compared to CS on days 2 and 3 of treatment. Mice administered CS/EPL had fewer bloodstream infections, lower weight loss, and greater activity than the untreated and CS groups. CS/EPL reduced bacterial burden by two orders of magnitude in vitro and exhibited low cytotoxicity against human cells. CONCLUSION A topical hydrogel delivering the antimicrobial peptide EPL demonstrates in vivo efficacy to reduce but not eradicate established P. aeruginosa biofilms in infected burn wounds. This biocompatible hydrogel shows promise as an antimicrobial barrier dressing for the sustained protection of burn wounds from external bacterial contamination.
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Affiliation(s)
- Andrea Y Moon
- Department of General Surgery, Tripler Army Medical Center, Tripler AMC, HI 96859, USA
| | - Emily J Bailey
- Department of Clinical Investigation, Tripler Army Medical Center, Tripler AMC, HI 96859, USA
| | - Jonilee A Polanco
- Department of Clinical Investigation, Tripler Army Medical Center, Tripler AMC, HI 96859, USA
| | - Wendy E Kurata
- Department of Clinical Investigation, Tripler Army Medical Center, Tripler AMC, HI 96859, USA
| | - Lisa M Pierce
- Department of Clinical Investigation, Tripler Army Medical Center, Tripler AMC, HI 96859, USA
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Shaw P, Sharma AK, Kalonia A, Shukla A, Kumar R, Kirti, Shukla SK. Early cutaneous inflammatory response at different degree of burn and its significance for clinical diagnosis and management. J Tissue Viability 2023; 32:550-563. [PMID: 37414707 DOI: 10.1016/j.jtv.2023.06.011] [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: 01/31/2023] [Revised: 05/24/2023] [Accepted: 06/30/2023] [Indexed: 07/08/2023]
Abstract
A complete characterization of the burn wound based on cutaneous architectural changes and inflammatory response is extremely important to provide evidence for progressive changes in the burn wound. Burn wounds are highly susceptible to conversion into deeper wounds, which need special care and attention; thereby, the complete characterization of burn wound type and their subsequent inflammatory status in the cutaneous system at the earliest is of paramount importance. Inflammatory markers at different degrees will help clinicians devise better and more specific treatment strategies for each burn type. The present study is carried out to profile pro-inflammatory gene expression along with immune cell quantification, vascular perfusion, and histopathological assessment in the cutaneous system of murine models. The study revealed that burn injury caused an immediate increase in vascular perfusion in superficial and partial-thickness burns, whereas there was a decrease in vascular perfusion in full-thickness burns. An influx of lymphocytes at the edges of burn wounds in each type of burn injury was well-orchestrated with the event of vascular perfusion. Further, pro-inflammatory gene expression profiling revealed significant upregulation vis-à-vis upregulation of TNF-α and MCP-1 genes, with an increase in the number of neutrophils following 72 h of injury that evidently cemented the conversion of superficial burn into partial-thickness burn. The molecular findings were profoundly supported by the histopathological changes. Thus, our foundational studies show distinct characteristic cutaneous changes correlated with the expression of key pro-inflammatory genes in three different types of burn injuries. Characterization of these cutaneous inflammatory responses provides a promising future for medical interventions involved with different degrees of burn injury, and it will also help in the pre-clinical testing of therapies for burn injury.
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Affiliation(s)
- Priyanka Shaw
- Molecular and Radiation Biosciences, Institute of Nuclear Medicine & Allied Sciences, Defence Research and Development Organization, Lucknow Road, Timarpur, New Delhi, 110054, India
| | - Ajay Kumar Sharma
- Molecular and Radiation Biosciences, Institute of Nuclear Medicine & Allied Sciences, Defence Research and Development Organization, Lucknow Road, Timarpur, New Delhi, 110054, India
| | - Aman Kalonia
- Molecular and Radiation Biosciences, Institute of Nuclear Medicine & Allied Sciences, Defence Research and Development Organization, Lucknow Road, Timarpur, New Delhi, 110054, India
| | - Amit Shukla
- Department of Pharmacology and Toxicology, College of Veterinary Science and Animal Husbandry, UP Pandit Deen Dayal Upadhyaya Pashu Chikitsa Vigyan Vishwavidyalaya Evam Go-Anusandhan Sansthan (DUVASU), Mathura, 281001, India
| | - Rishav Kumar
- Molecular and Radiation Biosciences, Institute of Nuclear Medicine & Allied Sciences, Defence Research and Development Organization, Lucknow Road, Timarpur, New Delhi, 110054, India
| | - Kirti
- Molecular and Radiation Biosciences, Institute of Nuclear Medicine & Allied Sciences, Defence Research and Development Organization, Lucknow Road, Timarpur, New Delhi, 110054, India
| | - Sandeep Kumar Shukla
- Molecular and Radiation Biosciences, Institute of Nuclear Medicine & Allied Sciences, Defence Research and Development Organization, Lucknow Road, Timarpur, New Delhi, 110054, India.
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Mulder PP, Vlig M, Elgersma A, Rozemeijer L, Mastenbroek LS, Middelkoop E, Joosten I, Koenen HJ, Boekema BK. Monocytes and T cells incorporated in full skin equivalents to study innate or adaptive immune reactions after burn injury. Front Immunol 2023; 14:1264716. [PMID: 37901218 PMCID: PMC10611519 DOI: 10.3389/fimmu.2023.1264716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 10/03/2023] [Indexed: 10/31/2023] Open
Abstract
Introduction Thermal injury often leads to prolonged and excessive inflammation, which hinders the recovery of patients. There is a notable absence of suitable animal-free models for investigating the inflammatory processes following burn injuries, thereby impeding the development of more effective therapies to improve burn wound healing in patients. Methods In this study, we established a human full skin equivalent (FSE) burn wound model and incorporated human peripheral blood-derived monocytes and T cells. Results Upon infiltration into the FSEs, the monocytes differentiated into macrophages within a span of 7 days. Burn-injured FSEs exhibited macrophages with increased expression of HLA-DR+ and elevated production of IL-8 (CXCL8), in comparison to uninjured FSEs. Among the T cells that actively migrated into the FSEs, the majority were CD4+ and CD25+. These T cells demonstrated augmented expression of markers associated with regulatory T cell, Th1, or Th17 activity, which coincided with significant heightened cytokine production, including IFN-γ, IL-4, IL-6, IL-8, IL-10, IL-12p70, IL-17A, IP-10 (CXCL10), and TGF-β1. Burn injury did not impact the studied effector T cell subsets or cytokine levels. Discussion Collectively, this study represents a significant advancement in the development of an immunocompetent human skin model, specifically tailored for investigating burn-induced innate or adaptive immune reactions at the site of burn injury.
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Affiliation(s)
- Patrick P.G. Mulder
- Preclinical Research, Association of Dutch Burn Centres (ADBC), Beverwijk, Netherlands
- Laboratory of Medical Immunology, Department of Laboratory Medicine, Radboud University Medical Center, Nijmegen, Netherlands
| | - Marcel Vlig
- Preclinical Research, Association of Dutch Burn Centres (ADBC), Beverwijk, Netherlands
| | - Anouk Elgersma
- Preclinical Research, Association of Dutch Burn Centres (ADBC), Beverwijk, Netherlands
| | - Lotte Rozemeijer
- Preclinical Research, Association of Dutch Burn Centres (ADBC), Beverwijk, Netherlands
| | | | - Esther Middelkoop
- Preclinical Research, Association of Dutch Burn Centres (ADBC), Beverwijk, Netherlands
- Department of Plastic, Reconstructive and Hand Surgery, Amsterdam UMC, VU University Amsterdam, Amsterdam, Netherlands
- Tissue Function and Regeneration, Amsterdam Movement Sciences, Amsterdam, Netherlands
| | - Irma Joosten
- Laboratory of Medical Immunology, Department of Laboratory Medicine, Radboud University Medical Center, Nijmegen, Netherlands
| | - Hans J.P.M. Koenen
- Laboratory of Medical Immunology, Department of Laboratory Medicine, Radboud University Medical Center, Nijmegen, Netherlands
| | - Bouke K.H.L. Boekema
- Preclinical Research, Association of Dutch Burn Centres (ADBC), Beverwijk, Netherlands
- Department of Plastic, Reconstructive and Hand Surgery, Amsterdam UMC, VU University Amsterdam, Amsterdam, Netherlands
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Kim SE, Kim YJ, Kim YW, Cheon YW. Heating Pretreatment of the Recipient Site Enhances Survival of Transplanted Fat in a Mouse Model. Plast Reconstr Surg 2023; 152:787-795. [PMID: 36847665 DOI: 10.1097/prs.0000000000010328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
BACKGROUND Despite several studies about the preparation of the recipient site in fat grafting, optimizing techniques with clinical usefulness is still necessary. Through previous animal studies reporting that heat can increase tissue vascular endothelial growth factor and vascular permeability, the authors hypothesize that pretreatment heating of the recipient site will increase retention of grafted fat. METHODS Twenty 6-week-old female BALB/c mice had two pretreatment sites on their back, one for the experimental temperatures (44°C and 48°C) and the other for the control. A digitally controlled aluminum block was used to apply the contact thermal damage. Human fat (0.5 mL) was grafted on each site and harvested on days 7, 14, and 49. The percentage volume and weight, histologic changes, and peroxisome proliferator-activated receptor gamma expression, a key regulator of adipogenesis, were measured by the water displacement method, light microscopy, and quantitative real-time polymerase chain reaction, respectively. RESULTS The harvested percentage volumes were 74.0% ± 3.4%, 82.5% ± 5.0%, and 67.5% ± 9.6% for the control, 44°C-pretreatment, and 48°C-pretreatment groups, respectively. The percentage volume and weight of the 44°C-pretreatment group was higher than the other groups ( P < 0.05). The 44°C-pretreatment group exhibited significantly higher integrity with fewer cysts and vacuoles than the other groups. Both heating pretreatment groups showed markedly higher rates of vascularity than the control group ( P < 0.017), and also increased the expression of peroxisome proliferator-activated receptor gamma over two-fold. CONCLUSION Heating preconditioning of the recipient site during fat grafting can increase the retention volume and improve the integrity, which is partly explained by increased adipogenesis in a short-term mouse model. CLINICAL RELEVANCE STATEMENT Tanning could be an alternative pretreatment for fat grafting.
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Affiliation(s)
- Sun Eung Kim
- From the Department of Plastic and Reconstructive Surgery, Gil Medical Center, Gachon University College of Medicine
| | - Yu Jin Kim
- From the Department of Plastic and Reconstructive Surgery, Gil Medical Center, Gachon University College of Medicine
| | - Yang Woo Kim
- From the Department of Plastic and Reconstructive Surgery, Gil Medical Center, Gachon University College of Medicine
| | - Young Woo Cheon
- From the Department of Plastic and Reconstructive Surgery, Gil Medical Center, Gachon University College of Medicine
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Li Z, Liu X, Zhang K, Zhao H, Luo P, Li D, Liu Z, Yuan H, Zhang B, Xie X, Shen C. Role and Mechanism of Endoplasmic Reticulum Stress in Mice Pancreatic Islet Dysfunction After Severe Burns. J Burn Care Res 2023; 44:1231-1240. [PMID: 36869805 DOI: 10.1093/jbcr/irad029] [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: 11/24/2022] [Indexed: 03/05/2023]
Abstract
This study attempted to investigate the role and mechanism of endoplasmic reticulum (ER) stress in the islet dysfunction in mice after severe burns. C57BL/6 mice were randomly divided into the sham group, burn group, and burn+4-phenylbutyric acid (4-PBA) group. Mice were burned with full thickness of 30% total surface area (TBSA), and 4-PBA solution was intraperitoneally injected into mice in burn+4-PBA group. Glucose-stimulated insulin secretion (GSIS), Fasting blood glucose (FBG) and glucose tolerance were detected 24 hours post severe burns. The ER stress-related pathway markers immunoglobulin binding protein (BIP), X-box binding protein 1 (XBP1), phosphorylation-PKR-like ER kinase (p-PERK), phosphorylation-eukaryotic translation initiation factor 2α (p-eIF2α), CHOP, activating transcription factor 6 (ATF6), apoptosis-related protein Cleaved-Caspase 3, and islet cell apoptosis were measured. Mice were characterized with elevated FBG, decreased glucose tolerance and GSIS levels post severe burns. The expression of BIP, XBP1, p-PERK, p-eIF2α, CHOP, ATF6, Cleaved-Caspase 3, and islet cell apoptosis were increased significantly after severe burns. 4-PBA treatment contributed to decreased FBG, improved glucose tolerance, increased GSIS, inhibited islet ER stress, and reduced pancreatic islet cell apoptosis in mice post severe burns. ER stress occurs in islets of severely burned mice, which leads to increased apoptosis of islet cells, thus resulting in islet dysfunction.
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Affiliation(s)
- Zhisheng Li
- Jinzhou Medical University, Jinzhou, China
- Department of Burns and Plastic Surgery, the Fourth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Xinzhu Liu
- Department of Burns and Plastic Surgery, the Fourth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Kun Zhang
- Jinzhou Medical University, Jinzhou, China
- Department of Burns and Plastic Surgery, the Fourth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Hongqing Zhao
- Jinzhou Medical University, Jinzhou, China
- Department of Burns and Plastic Surgery, the Fourth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Peng Luo
- Department of Burns and Plastic Surgery, the Fourth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Dawei Li
- Department of Burns and Plastic Surgery, the Fourth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Zhaoxing Liu
- Department of Burns and Plastic Surgery, the Fourth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Huageng Yuan
- Department of Burns and Plastic Surgery, the Fourth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Bohan Zhang
- Department of Burns and Plastic Surgery, the Fourth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Xiaoye Xie
- Department of Burns and Plastic Surgery, the Fourth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Chuan'an Shen
- Department of Burns and Plastic Surgery, the Fourth Medical Center, Chinese PLA General Hospital, Beijing, China
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Du J, Liu X, Wong CWY, Wong KKY, Yuan Z. Direct cellular reprogramming and transdifferentiation of fibroblasts on wound healing-Fantasy or reality? Chronic Dis Transl Med 2023; 9:191-199. [PMID: 37711868 PMCID: PMC10497843 DOI: 10.1002/cdt3.77] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 04/15/2023] [Accepted: 05/23/2023] [Indexed: 09/16/2023] Open
Abstract
Induced pluripotent stem cell (iPSC) technology is one of the de novo approaches in regeneration medicine and has led to new research applications for wound healing in recent years. Fibroblasts have attracted wide attention as the first cell line used for differentiation into iPSCs. Researchers have found that fibroblasts can be induced into different types of cells in variable mediums or microenvironments. This indicates the potential "stem" characteristics of fibroblasts in terms of direct cellular reprogramming compared with the iPSC detour. In this review, we described the morphology and biological function of fibroblasts. The stem cell characteristics and activities of fibroblasts, including transdifferentiation into myofibroblasts, osteogenic cells, chondrogenic cells, neurons, and vascular tissue, are discussed. The biological values of fibroblasts are then briefly reviewed. Finally, we discussed the potential applications of fibroblasts in clinical practice.
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Affiliation(s)
- Juan Du
- Diabetic Foot Diagnosis and Treatment CentreJilin Province People HospitalChangchunJilinChina
| | - Xuelai Liu
- Department of SurgeryCapital Institute of Pediatrics Affiliated Children HospitalBeijingChina
| | - Carol Wing Yan Wong
- Department of Surgery, Li Ka Shing Faculty of MedicineThe University of Hong KongHong Kong SARChina
| | - Kenneth Kak Yuen Wong
- Department of Surgery, Li Ka Shing Faculty of MedicineThe University of Hong KongHong Kong SARChina
| | - Zhixin Yuan
- Department of Emergency SurgeryJilin Province People HospitalChangchunJilinChina
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Shi M, Lu Y, Mohyeddin A, Qi F, Pan Y. Preservation of Eschar Prevents Excessive Wound Healing by Reducing M2 Macrophages Polarization. PLASTIC AND RECONSTRUCTIVE SURGERY-GLOBAL OPEN 2023; 11:e5238. [PMID: 37731728 PMCID: PMC10508428 DOI: 10.1097/gox.0000000000005238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 07/11/2023] [Indexed: 09/22/2023]
Abstract
Background Removal of the eschar has gradually become a consensus on treatments of deep dermal necrosis after skin trauma in recent years, whereas exaggerated scar contracture and tissue proliferation developed during healing have received little attention. Here, the authors investigated the effects of eschar on excessive wound healing of small dermal damage and focused on the role M2 macrophages played, hoping to offer a theoretical basis to improve patients' cosmetic satisfaction. Methods A mouse dorsal wound model (n = 12) was established by electric heating pads heating for 20 seconds on each side of the spine, and the left side was the preserved group. Macrophage numbers, expression of wound-healing-associated proteins, and inflammatory cytokine levels were assessed at different time points by immunohistochemistry and quantitative real-time polymerase chain reaction. A co-culture system of M2 macrophages and myofibroblasts was created in vitro. Immunohistochemistry, real-time polymerase chain reaction, and Western blot were performed to evaluate the proliferation, migration, and protein expression of myofibroblasts. Results Preserving eschar inhibited contraction-associated proteins (α-smooth muscle actin and vimentin) and collagen expression, inflammatory cytokine (IL-1β, IL-10, TFN-α, and IL-4) expression, and M2 macrophage infiltration. Mechanistically, M2 macrophages potentially contributed to excessive wound healing by promoting myofibroblasts proliferation, migration, and production of contraction-associated proteins. Conclusion Eschar preservation in wounds could reduce inflammation and negatively modulate myofibroblasts by inhibiting M2 macrophage polarization and infiltration, preventing excessive wound contraction and collagen deposition.
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Affiliation(s)
- Mingyue Shi
- From the Department of Plastic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yao Lu
- From the Department of Plastic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Ali Mohyeddin
- From the Department of Plastic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Fazhi Qi
- From the Department of Plastic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yuyan Pan
- From the Department of Plastic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
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Xu Y, Hu K, Liu C, Du P, Zhou F, Lu Y, Fu Q, Xu J, Lyu G. Eschar dissolution and the immunoregulator effect of keratinase on burn wounds. Sci Rep 2023; 13:13238. [PMID: 37580372 PMCID: PMC10425458 DOI: 10.1038/s41598-023-39765-4] [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: 02/01/2023] [Accepted: 07/30/2023] [Indexed: 08/16/2023] Open
Abstract
At present, enzyme debridement preparation has shown a good curative effect on eschar removal of burn wounds. Keratinase has shown great potential in enzymatic debridement because of its good fibrin-degrading ability. In this study, the debridement of keratinase was examined by using a third degree burn wound model in rats. We observed the wound, and keratinase shortened the time of eschar dissolution after debridement. Histopathology and immunofluorescence staining showed that the eschar in the keratinase group became thinner, inflammatory cell infiltration in the wound increased, the fluorescence intensity of the macrophage surface marker CD68 increased, and the CD163/CD86 ratio increased. In bone marrow-derived macrophages (BMDMs), there was no significant difference in the activity of CCK-8 in cells in the keratinase group compared with the control group. The fluorescence intensity of the keratinase group was higher than that of the control group. At 12 h, the cell scratches were obviously closed. The number of migrated Transwell cells increased. Flow cytometry and immunofluorescence analysis showed increased expression of CD206 and Arg-1 and decreased expression of CD86 and iNOS. The gene expression of the Arg-1, iNOS and IL-10 was increased, as shown by qPCR. The secretion of IL-10 was increased and TNF-α was decreased, as shown by ELISA. We concluded that keratinase dissolution of eschar not only has a hydrolytic effect on eschar but may also affect immune regulation to enhance the migration and phagocytosis of macrophages, promote the polarization of macrophages, and further enhance the effect of eschar dissolution. Therefore, keratinase may have good prospects for the debridement of burn wounds.
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Affiliation(s)
- Yan Xu
- Wuxi Clinical Medical College of Nanjing University of Traditional Chinese Medicine, Wuxi, 214041, China
- Affiliated Hospital of Jiangnan University, Wuxi, 214041, China
| | - Kai Hu
- Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Chenyang Liu
- Affiliated Hospital of Jiangnan University, Wuxi, 214041, China
| | - Pan Du
- Jiangnan University, Wuxi, 214122, China
| | - Feifan Zhou
- Medical College of Nantong University, Nantong, 226000, China
| | - Yichi Lu
- Jiangnan University, Wuxi, 214122, China
| | - Qiuyan Fu
- Jiangnan University, Wuxi, 214122, China
| | - Jianmin Xu
- Affiliated Hospital of Jiangnan University, Wuxi, 214041, China.
| | - Guozhong Lyu
- Affiliated Hospital of Jiangnan University, Wuxi, 214041, China.
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Maslova E, Osman S, McCarthy RR. Using the Galleria mellonella burn wound and infection model to identify and characterize potential wound probiotics. MICROBIOLOGY (READING, ENGLAND) 2023; 169:001350. [PMID: 37350463 PMCID: PMC10333784 DOI: 10.1099/mic.0.001350] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 06/07/2023] [Indexed: 06/24/2023]
Abstract
Burn wound infection is the leading cause of mortality among burn wound patients. One of the most commonly isolated bacterial burn wound pathogens is Pseudomonas aeruginosa, a notorious nosocomial multidrug-resistant pathogen. As a consequence of its recalcitrance to frontline antibiotic therapy, there is an urgent need to develop alternative treatment avenues to tackle this pathogen. One potential alternative infection prevention measure is to seed the wound bed with probiotic bacteria. Several species of Lactobacillus, a common commensal bacterium, have been previously reported to display growth inhibition activity against wound pathogens. Various species of this genus have also been shown to augment the wound healing process, which makes it a promising potential therapeutic agent. Due to the complexity of the burn wound trauma and burn wound infection, an in vivo model is required for the development of novel therapeutics. There are multiple in vivo models that are currently available, the most common among them being the murine model. However, mammalian burn wound infection models are logistically challenging, do not lend themselves to screening approaches and come with significant concerns around ethics and animal welfare. Recently, an invertebrate burn wound and infection model using G. mellonella has been established. This model addresses several of the challenges of more advanced animal models, such as affordability, maintenance and reduced ethical concerns. This study validates the capacity of this model to screen for potential wound probiotics by demonstrating that a variety of Lactobacillus spp. can limit P. aeruginosa burn wound infection and improve survival.
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Affiliation(s)
- Evgenia Maslova
- Division of Biosciences, Department of Life Sciences, Centre of Inflammation Research and Translational Medicine, College of Health, Medicine and Life Sciences, College of Health and Life Sciences, Brunel University London, Uxbridge, UK
| | - Shanga Osman
- Division of Biosciences, Department of Life Sciences, Centre of Inflammation Research and Translational Medicine, College of Health, Medicine and Life Sciences, College of Health and Life Sciences, Brunel University London, Uxbridge, UK
| | - Ronan R. McCarthy
- Division of Biosciences, Department of Life Sciences, Centre of Inflammation Research and Translational Medicine, College of Health, Medicine and Life Sciences, College of Health and Life Sciences, Brunel University London, Uxbridge, UK
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Hofmann E, Fink J, Pignet AL, Schwarz A, Schellnegger M, Nischwitz SP, Holzer-Geissler JCJ, Kamolz LP, Kotzbeck P. Human In Vitro Skin Models for Wound Healing and Wound Healing Disorders. Biomedicines 2023; 11:biomedicines11041056. [PMID: 37189674 DOI: 10.3390/biomedicines11041056] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 03/23/2023] [Accepted: 03/24/2023] [Indexed: 05/17/2023] Open
Abstract
Skin wound healing is essential to health and survival. Consequently, high amounts of research effort have been put into investigating the cellular and molecular components involved in the wound healing process. The use of animal experiments has contributed greatly to the knowledge of wound healing, skin diseases, and the exploration of treatment options. However, in addition to ethical concerns, anatomical and physiological inter-species differences often influence the translatability of animal-based studies. Human in vitro skin models, which include essential cellular and structural components for wound healing analyses, would improve the translatability of results and reduce animal experiments during the preclinical evaluation of novel therapy approaches. In this review, we summarize in vitro approaches, which are used to study wound healing as well as wound healing-pathologies such as chronic wounds, keloids, and hypertrophic scars in a human setting.
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Affiliation(s)
- Elisabeth Hofmann
- COREMED-Centre of Regenerative and Precision Medicine, JOANNEUM RESEARCH Forschungsgesellschaft mbH, 8010 Graz, Austria
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
- Research Unit for Tissue Regeneration, Repair and Reconstruction, Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
| | - Julia Fink
- COREMED-Centre of Regenerative and Precision Medicine, JOANNEUM RESEARCH Forschungsgesellschaft mbH, 8010 Graz, Austria
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
- Research Unit for Tissue Regeneration, Repair and Reconstruction, Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
| | - Anna-Lisa Pignet
- COREMED-Centre of Regenerative and Precision Medicine, JOANNEUM RESEARCH Forschungsgesellschaft mbH, 8010 Graz, Austria
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
- Research Unit for Tissue Regeneration, Repair and Reconstruction, Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
| | - Anna Schwarz
- COREMED-Centre of Regenerative and Precision Medicine, JOANNEUM RESEARCH Forschungsgesellschaft mbH, 8010 Graz, Austria
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
- Research Unit for Tissue Regeneration, Repair and Reconstruction, Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
| | - Marlies Schellnegger
- COREMED-Centre of Regenerative and Precision Medicine, JOANNEUM RESEARCH Forschungsgesellschaft mbH, 8010 Graz, Austria
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
| | - Sebastian P Nischwitz
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
- Research Unit for Tissue Regeneration, Repair and Reconstruction, Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
| | - Judith C J Holzer-Geissler
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
- Research Unit for Tissue Regeneration, Repair and Reconstruction, Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
| | - Lars-Peter Kamolz
- COREMED-Centre of Regenerative and Precision Medicine, JOANNEUM RESEARCH Forschungsgesellschaft mbH, 8010 Graz, Austria
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
| | - Petra Kotzbeck
- COREMED-Centre of Regenerative and Precision Medicine, JOANNEUM RESEARCH Forschungsgesellschaft mbH, 8010 Graz, Austria
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
- Research Unit for Tissue Regeneration, Repair and Reconstruction, Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, 8036 Graz, Austria
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Experimentally Induced Burns in Rats Treated with Innovative Polymeric Films Type Therapies. Biomedicines 2023; 11:biomedicines11030852. [PMID: 36979831 PMCID: PMC10045338 DOI: 10.3390/biomedicines11030852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 02/27/2023] [Accepted: 03/08/2023] [Indexed: 03/18/2023] Open
Abstract
Considering that microbial resistance to antibiotics is becoming an increasingly widespread problem, burn management, which usually includes the use of topical antimicrobial dressings, is still facing difficulties regarding their efficiency to ensure rapid healing. In this context, the main objective of this research is to include new oxytetracycline derivatives in polymeric-film-type dressings for the treatment of wounds caused by experimentally induced burns in rats. The structural and physico-chemical properties of synthesized oxytetracycline derivatives and the corresponding membranes were analyzed by FT-IR and MS spectroscopy, swelling ability and biodegradation capacity. In vitro antimicrobial activity using Gram-positive and Gram-negative bacterial strains and pathogenic yeasts, along with an in vivo study of a burn wound model induced in Wistar rats, was also analyzed. The newly obtained polymeric films, namely chitosan-oxytetracycline derivative membranes, showed good antimicrobial activity noticed in the tested strains, a membrane swelling ratio (MSR) of up to 1578% in acidic conditions and a biodegradation rate of up to 15.7% on day 7 of testing, which are important required characteristics for the tissue regeneration process, after the production of a burn. The in vivo study proved that chitosan-derived oxytetracycline membranes showed also improved healing effects which contributes to supporting the idea of using them for the treatment of wounds caused by burns.
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Deana NF, Zaror C, Del Sol M, Bagnato VS, Alves N. Wound contraction rate in excised and unexcised burn wounds with laser photobiomodulation: Systematic review and meta-analysis of preclinical studies. Burns 2023; 49:261-274. [PMID: 35842272 DOI: 10.1016/j.burns.2022.05.009] [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: 05/10/2021] [Revised: 05/04/2022] [Accepted: 05/09/2022] [Indexed: 12/09/2022]
Abstract
INTRODUCTION Laser photobiomodulation (laser PBM) is an effective means of accelerating burn wound contraction, however it is still unclear whether laser PBM produces greater benefit when applied directly to excised and unexcised burn wounds . The aim of this systematic review of preclinical studies was to determine the effectiveness of laser PBM in the wound contraction rate in excised and unexcised burn wounds. MATERIALS AND METHODS A systematic search was conducted in the EMBASE, MEDLINE and LILACS databases. Preclinical studies were included that analysed the effectiveness of laser PBM in burn wound contraction, and assessed wound closure. The SYRCLE risk of bias tool was used. Random effects models were used to estimate the pooled effect. RESULTS Thirteen studies were included in the qualitative analysis and six in the quantitative analysis. Two weeks after the lesion, laser PBM favoured the wound contraction percentage, increasing the closure rate in excised burn wounds (SMD= 1.34, CI 95% 0.41 to 2.27, 0.41-2.27, I2=0%, =0%, low certainty of evidence. In unexcised burns, it was uncertain whether laser PBM increased or diminished the wound contraction rate (SMD=1.22(SMD=1.22 CI 95% -0.05 to 2.49, I2=68%; =68%; very low certainty of evidence). CONCLUSIONS In the animal model, laser PBM is effective in increasing the wound contraction rate in excised burns. However, due to the low certainty of the evidence, uncertainty remains about the true magnitude of the effect of laser on wound contraction in animals; our results should therefore be interpreted with caution.
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Affiliation(s)
- Naira Figueiredo Deana
- Center for Research in Epidemiology, Economics and Oral Public Health (CIEESPO), Faculty of Dentistry, Universidad de La Frontera, Temuco, Chile; Department of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, Universidad de La Frontera, Temuco, Chile; Doctoral Program in Morphological Sciences, Universidad de La Frontera, Temuco, Chile
| | - Carlos Zaror
- Center for Research in Epidemiology, Economics and Oral Public Health (CIEESPO), Faculty of Dentistry, Universidad de La Frontera, Temuco, Chile; Department of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, Universidad de La Frontera, Temuco, Chile; Faculty of Dentistry, Universidad San Sebastian, Puerto Montt, Chile
| | - Mariano Del Sol
- Center of Excellence in Surgical and Morphological Research (CEMyQ), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile
| | - Vanderlei Salvador Bagnato
- São Carlos Institute of Physics, University of São Paulo, Avenida Trabalhador São Carlense, 400, Parque Arnold Schimidt, CEP: 13.566-590, São Carlos, São Paulo, Brazil
| | - Nilton Alves
- Center of Excellence in Surgical and Morphological Research (CEMyQ), Faculty of Medicine, Universidad de La Frontera, Temuco, Chile; Applied Morphology Research Centre (CIMA), Faculty of Dentistry, Universidad de La Frontera, Temuco, Chile.
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Skowrońska W, Bazylko A. The Potential of Medicinal Plants and Natural Products in the Treatment of Burns and Sunburn-A Review. Pharmaceutics 2023; 15:pharmaceutics15020633. [PMID: 36839954 PMCID: PMC9958865 DOI: 10.3390/pharmaceutics15020633] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 02/04/2023] [Accepted: 02/10/2023] [Indexed: 02/15/2023] Open
Abstract
Treating burns remains a challenge for modern medicine, especially in developing countries that cannot afford expensive, advanced therapies. This review article summarises clinical and animal model studies of botanical preparations and their mixtures in treating burn wounds and sunburn. Articles available in electronic databases such as PubMed, Scopus, Web of Science, Science Direct and Google Scholar, published in English in 2010-2022, were considered. In the described clinical trials, it was shown that some herbal preparations have better effectiveness in treating burn wounds, including shortening the healing time and reducing inflammation, than the conventional treatment used hitherto. These herbal preparations contained extracts from Albizia julibrissin, Alkanna tinctoria, Aloe vera, Arnebia euchroma, Betula pendula and Betula pubescens, Centella asiatica, Hippophaë rhamnoides, Juglans regia, Lawsonia inermis, and mixtures of Matricaria chamomilla and Rosa canina. Research on animal models shows that many extracts may potentially benefit the treatment of burn wounds and sunburn. Due to the diverse mechanism of action, antibacterial activity, the safety of use and cost-effectiveness, herbal preparations can compete with conventional treatment. The growing interest in alternative medicine and herbal medicine encourages further research. Not only single preparations but also their mixtures should be taken into account because the research conducted so far often suggests a synergistic effect of the ingredients.
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Elrod J, Lenz M, Kiwit A, Armbrust L, Schönfeld L, Reinshagen K, Pagerols Raluy L, Mohr C, Saygi C, Alawi M, Rohde H, Herrmann M, Boettcher M. Murine scald models characterize the role of neutrophils and neutrophil extracellular traps in severe burns. Front Immunol 2023; 14:1113948. [PMID: 36825027 PMCID: PMC9941538 DOI: 10.3389/fimmu.2023.1113948] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 01/25/2023] [Indexed: 02/09/2023] Open
Abstract
Introduction Severe burns cause unique pathophysiological alterations especially on the immune system. A murine scald model was optimized as a basis for the understanding of immunological reactions in response to heat induced injury. The understanding of the roles of neutrophil extracellular traps (NETs) and DNases will support the development of new surgical or pharmacological strategies for the therapy of severe burns. Methods We studied C57BL/6 mice (n=30) and employed four scalding protocols with varying exposure times to hot water. An additional scald group with a shorter observational time was generated to reduce mortality and study the very early phase of pathophysiology. At 24h or 72h, blood was drawn and tissue (wound, liver, lung, spleen) was analyzed for the presence of NETs, oxidative stress, apoptosis, bacterial translocation, and extracellular matrix re-organization. In addition, we analyzed the transcriptome from lung and liver tissues. Results Exposure to hot water for 7s led to significant systemic and local effects and caused considerable late mortality. Therefore, we used an observation time of 24h in this groups. To study later phases of burns (72h) an exposure time of 6s is optimal. Both conditions led to significant disorganization of collagen, increased oxidative stress, NET formation (by immunodetection of H3cit, NE, MPO), apoptosis (cC3) and alterations of the levels of DNase1 and DNase1L3. Transcriptome analysis revealed remarkable alterations in genes involved in acute phase signaling, cell cohesion, extracellular matrix organization, and immune response. Conclusion We identified two scald models that allow the analysis of early (24h) or late (72h) severe burn effects, thereby generating reproducible and standardized scald injuries. The study elucidated the important involvement of neutrophil activity and the role of NETs in burns. Extensive transcriptome analysis characterized the acute phase and tissue remodeling pathways involved in the process of healing and may serve as crucial basis for future in-depth studies.
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Affiliation(s)
- Julia Elrod
- Department of Pediatric Surgery, University Medical Center Mannheim, Heidelberg University, Mannheim, Germany,Department of Pediatric Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany,*Correspondence: Julia Elrod,
| | - Moritz Lenz
- Department of Pediatric Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Antonia Kiwit
- Department of Pediatric Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Lina Armbrust
- Department of Pediatric Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Lavinia Schönfeld
- Department of Pediatric Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Konrad Reinshagen
- Department of Pediatric Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Laia Pagerols Raluy
- Department of Pediatric Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Christoph Mohr
- Department of Pediatric Surgery, University Medical Center Mannheim, Heidelberg University, Mannheim, Germany
| | - Ceren Saygi
- Bioinformatics Core, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Malik Alawi
- Bioinformatics Core, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Holger Rohde
- Institute of Medical Microbiology, Virology and Hygiene, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Martin Herrmann
- Department of Pediatric Surgery, University Medical Center Mannheim, Heidelberg University, Mannheim, Germany,Department of Medicine 3, Friedrich Alexander University Erlangen-Nuremberg and Universitaetsklinikum Erlangen, Erlangen, Germany,Deutsches Zentrum Immuntherapie DZI, Friedrich Alexander University Erlangen-Nuremberg and Universitaetsklinikum Erlangen, Erlangen, Germany
| | - Michael Boettcher
- Department of Pediatric Surgery, University Medical Center Mannheim, Heidelberg University, Mannheim, Germany,Department of Pediatric Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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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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Laser-Induced Porcine Model of Experimental Retinal Vein Occlusion: An Optimized Reproducible Approach. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:medicina59020243. [PMID: 36837445 PMCID: PMC9962108 DOI: 10.3390/medicina59020243] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 01/15/2023] [Accepted: 01/16/2023] [Indexed: 01/31/2023]
Abstract
Retinal vein occlusion (RVO) is a frequent visually disabling condition. The management of RVO continues to challenge clinicians. Macular edema secondary to RVO is often recurrent, and patients typically require intravitreal injections for several years. Understanding molecular mechanisms in RVO is a key element in improving the treatment of the condition. Studying the molecular mechanisms in RVO at the retinal level is possible using animal models of experimental RVO. Most studies of experimental RVO have been sporadic, using only a few animals per experiment. Here, we report on 10 years of experience of the use of argon laser-induced experimental RVO in 108 porcine eyes from 65 animals, including 65 eyes with experimental branch retinal vein occlusion (BRVO) and 43 eyes with experimental central retinal vein occlusion (CRVO). Reproducibility and methods for evaluating and controlling ischemia in experimental RVO are reviewed. Methods for studying protein changes in RVO are discussed in detail, including proteomic analysis, Western blotting, and immunohistochemistry. Experimental RVO has brought significant insights into molecular changes in RVO. Testing intravitreal interventions in experimental RVO may be a significant step in developing personalized therapeutic approaches for patients with RVO.
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Tang SC, Lu CT, Ko JL, Lin CH, Hsiao YP. Hydroxychloroquine repairs burn damage through the Wnt/β-catenin pathway. Chem Biol Interact 2023; 370:110309. [PMID: 36535310 DOI: 10.1016/j.cbi.2022.110309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 11/22/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022]
Affiliation(s)
- Sheau-Chung Tang
- Department of Nursing, National Taichung University of Science and Technology, Taichung, 40640, Taiwan
| | - Chun-Te Lu
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Taichung Veterans General Hospital, Taichung, Taiwan; Institute of Medicine, School of Medicine, College of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Jiunn-Liang Ko
- Department of Medical Oncology and Chest Medicine, Chung Shan Medical University Hospital, Taichung, 402, Taiwan; Institute of Medicine, School of Medicine, Chung Shan Medical University, Taichung, Taiwan
| | - Cheng-Hui Lin
- Institute of Medicine, School of Medicine, Chung Shan Medical University, Taichung, Taiwan
| | - Yu-Ping Hsiao
- Department of Dermatology, Chung Shan Medical University Hospital, Taichung, Taiwan; Institute of Medicine, School of Medicine, Chung Shan Medical University, Taichung, Taiwan.
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Tsai KHY, Shi H, Parungao RJ, Naficy S, Ding X, Ding X, Hew JJ, Wang X, Chrzanowski W, Lavery GG, Li Z, Issler-Fisher AC, Chen J, Tan Q, Maitz PK, Cooper MS, Wang Y. Skin 11β-hydroxysteroid dehydrogenase type 1 enzyme expression regulates burn wound healing and can be targeted to modify scar characteristics. BURNS & TRAUMA 2023; 11:tkac052. [PMID: 36694861 PMCID: PMC9862341 DOI: 10.1093/burnst/tkac052] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 09/29/2022] [Accepted: 11/16/2022] [Indexed: 06/17/2023]
Abstract
BACKGROUND Excessive scarring and fibrosis are the most severe and common complications of burn injury. Prolonged exposure to high levels of glucocorticoids detrimentally impacts on skin, leading to skin thinning and impaired wound healing. Skin can generate active glucocorticoids locally through expression and activity of the 11β-hydroxysteroid dehydrogenase type 1 enzyme (11β-HSD1). We hypothesised that burn injury would induce 11β-HSD1 expression and local glucocorticoid metabolism, which would have important impacts on wound healing, fibrosis and scarring. We additionally proposed that pharmacological manipulation of this system could improve aspects of post-burn scarring. METHODS Skin 11β-HSD1 expression in burns patients and mice was examined. The impacts of 11β-HSD1 mediating glucocorticoid metabolism on burn wound healing, scar formation and scar elasticity and quality were additionally examined using a murine 11β-HSD1 genetic knockout model. Slow-release scaffolds containing therapeutic agents, including active and inactive glucocorticoids, were developed and pre-clinically tested in mice with burn injury. RESULTS We demonstrate that 11β-HSD1 expression levels increased substantially in both human and mouse skin after burn injury. 11β-HSD1 knockout mice experienced faster wound healing than wild type mice but the healed wounds manifested significantly more collagen deposition, tensile strength and stiffness, features characteristic of excessive scarring. Application of slow-release prednisone, an inactive glucocorticoid, slowed the initial rate of wound closure but significantly reduced post-burn scarring via reductions in inflammation, myofibroblast generation, collagen production and scar stiffness. CONCLUSIONS Skin 11β-HSD1 expression is a key regulator of wound healing and scarring after burn injury. Application of an inactive glucocorticoid capable of activation by local 11β-HSD1 in skin slows the initial rate of wound closure but significantlyimproves scar characteristics post burn injury.
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Affiliation(s)
- Kevin H-Y Tsai
- Adrenal Steroid Group, ANZAC Research Institute, Concord Hospital, The University of Sydney, Sydney, NSW 2137, Australia
- Burns and Reconstructive Surgery Research Group, ANZAC Research Institute, Concord Hospital, The University of Sydney, Sydney, NSW 2137, Australia
| | - Huaikai Shi
- Burns and Reconstructive Surgery Research Group, ANZAC Research Institute, Concord Hospital, The University of Sydney, Sydney, NSW 2137, Australia
| | - Roxanne J Parungao
- Burns and Reconstructive Surgery Research Group, ANZAC Research Institute, Concord Hospital, The University of Sydney, Sydney, NSW 2137, Australia
| | - Sina Naficy
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW 2006, Australia
| | - Xiaotong Ding
- Jiangsu Provincial Engineering Research Centre of TCM External Medication Development and Application, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, 210023, China
| | - Xiaofeng Ding
- Department of Burns and Plastic Surgery, Nanjing Drum Tower Hospital Clinical College, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, 210008, China
| | - Jonathan J Hew
- Burns and Reconstructive Surgery Research Group, ANZAC Research Institute, Concord Hospital, The University of Sydney, Sydney, NSW 2137, Australia
| | - Xiaosuo Wang
- Heart Research Institute, The University of Sydney, Sydney, NSW 2006 , Australia
| | - Wojciech Chrzanowski
- Sydney Nano Institute, Sydney Pharmacy School, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia
| | - Gareth G Lavery
- Department of Biosciences, Centre for Healthy Ageing and Understanding Disease, Nottingham Trent University, NG1 4BU, UK
| | - Zhe Li
- Burns and Reconstructive Surgery Unit, Concord Repatriation General Hospital, Sydney, NSW 2137, Australia
| | - Andrea C Issler-Fisher
- Burns and Reconstructive Surgery Unit, Concord Repatriation General Hospital, Sydney, NSW 2137, Australia
| | - Jun Chen
- Jiangsu Provincial Engineering Research Centre of TCM External Medication Development and Application, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, 210023, China
| | - Qian Tan
- Department of Burns and Plastic Surgery, Nanjing Drum Tower Hospital Clinical College, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, 210008, China
| | - Peter K Maitz
- Burns and Reconstructive Surgery Research Group, ANZAC Research Institute, Concord Hospital, The University of Sydney, Sydney, NSW 2137, Australia
- Burns and Reconstructive Surgery Unit, Concord Repatriation General Hospital, Sydney, NSW 2137, Australia
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Full Skin Equivalent Models for Simulation of Burn Wound Healing, Exploring Skin Regeneration and Cytokine Response. J Funct Biomater 2023; 14:jfb14010029. [PMID: 36662076 PMCID: PMC9864292 DOI: 10.3390/jfb14010029] [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: 12/07/2022] [Revised: 12/29/2022] [Accepted: 12/31/2022] [Indexed: 01/06/2023] Open
Abstract
Healing of burn injury is a complex process that often leads to the development of functional and aesthetic complications. To study skin regeneration in more detail, organotypic skin models, such as full skin equivalents (FSEs) generated from dermal matrices, can be used. Here, FSEs were generated using de-epidermalized dermis (DED) and collagen matrices MatriDerm® and Mucomaix®. Our aim was to validate the MatriDerm- and Mucomaix-based FSEs for the use as in vitro models of wound healing. Therefore, we first characterized the FSEs in terms of skin development and cell proliferation. Proper dermal and epidermal morphogenesis was established in all FSEs and was comparable to ex vivo human skin models. Extension of culture time improved the organization of the epidermal layers and the basement membrane in MatriDerm-based FSE but resulted in rapid degradation of the Mucomaix-based FSE. After applying a standardized burn injury to the models, re-epithelization occurred in the DED- and MatriDerm-based FSEs at 2 weeks after injury, similar to ex vivo human skin. High levels of pro-inflammatory cytokines were present in the culture media of all models, but no significant differences were observed between models. We anticipate that these animal-free in vitro models can facilitate research on skin regeneration and can be used to test therapeutic interventions in a preclinical setting to improve wound healing.
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Amorim FCM, Arisawa EÂL, Sant'anna LB, Rodrigues ABM, Costa DR. Preclinical study of experimental burns treated with photobiomodulation and Human Amniotic Membrane, both isolated and associated. Rev Lat Am Enfermagem 2023; 31:e3726. [PMID: 36888787 PMCID: PMC9991011 DOI: 10.1590/1518-8345.5552.3726] [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: 07/07/2021] [Accepted: 07/08/2022] [Indexed: 03/08/2023] Open
Abstract
OBJECTIVE to evaluate the effect of photobiomodulation with low-level 660 nm laser alone or associated with Human Amniotic Membrane in the repair of partial-thickness burns in rats. METHOD an experimental study conducted with 48 male Wistar rats, randomized into four groups: Control, Human Amniotic Membrane, Low-Level Laser Therapy, and Low-Level Laser Therapy associated with Human Amniotic Membrane. The histopathological characteristics of the skin samples were analyzed 7 and 14 days after the burn. The data obtained were submitted to the Kolmogorov-Smirnov and Mann-Whitney tests. RESULTS the histological analysis of the burn injuries showed a decrease in inflammation (p<0.0001) and an increase in proliferation of fibroblasts (p<0.0001) mainly at 7 days in all treatments related to the control group. At 14 days, the greater effectiveness in accelerating the healing process was significant (p<0.0001) in the Low-Level Laser Therapy group associated with the Human Amniotic Membrane. CONCLUSION the association of photobiomodulation therapies with the Human Amniotic Membrane allowed verifying a reduction in the healing process time of the experimental lesions, stimulating its proposal as a treatment protocol in partial-thickness burns.
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Affiliation(s)
| | | | | | - Ana Beatriz Mendes Rodrigues
- Faculdade de Ciências da Saúde Pitágoras de Codó, Codó, MA, Brazil.,Universidade Federal do Piauí, Teresina, PI, Brazil
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Muacevic A, Adler JR, Torres R, Maita K, Garcia J, Serrano L, Ho O, Forte AJ. Modulation of Burn Hypermetabolism in Preclinical Models. Cureus 2023; 15:e33518. [PMID: 36779088 PMCID: PMC9904913 DOI: 10.7759/cureus.33518] [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] [Accepted: 01/08/2023] [Indexed: 01/11/2023] Open
Abstract
Severe burns elicit a state of physiological stress and increased metabolism to help the body compensate for the changes associated with the traumatic injury. However, this hypermetabolic state is associated with increased insulin resistance, cardiovascular dysfunction, skeletal muscle catabolism, impaired wound healing, and delayed recovery. Several interventions were attempted to modulate burn hypermetabolism, including nutritional support, early excision and grafting, and growth hormone application. However, burn hypermetabolism still imposes significant morbidity and mortality in burn patients. Due to the limitations of in vitro models, animal models are indispensable in burn research. Animal models provide researchers with invaluable tools to test the safety and efficacy of novel treatments or advance our knowledge of previously utilized agents. Several animal studies evaluated novel therapies to modulate burn hypermetabolism in the last few years, including recombinant human growth hormone, erythropoietin, acipimox, apelin, anti-interleukin-6 monoclonal antibody, and ghrelin therapies. Results from these studies are promising and may be effectively translated into human studies. In addition, other studies revisited drugs previously used in clinical practice, such as insulin and metformin, to further investigate their underlying mechanisms as modulators of burn hypermetabolism. This review aims to update burn experts with the novel therapies under investigation in burn hypermetabolism with a focus on applicability and translation. Furthermore, we aim to guide researchers in selecting the correct animal model for their experiments by providing a summary of the methodology and the rationale of the latest studies.
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Colby LE, Watson DP. Fully Guided Tooth Bud Ablation in Pigs Results in Complete Tooth Bud Removal and Molar Agenesis. J Oral Maxillofac Surg 2022; 81:456-466. [PMID: 36592934 DOI: 10.1016/j.joms.2022.12.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 12/09/2022] [Accepted: 12/11/2022] [Indexed: 12/31/2022]
Abstract
PURPOSE Fully guided microwave tooth bud ablation has the potential to become a minimally invasive means for managing third molars in adolescent patients. If developed, this new modality could provide improved outcomes and reduced complications compared to traditional third molar management strategies. The purpose of this 28-day longitudinal characterization study was to determine if the healing response following fully guided microwave ablation of second molar tooth buds in juvenile pigs would result in the complete removal of targeted tooth bud tissues, molar agenesis, and no significant collateral tissue damage. METHODS Investigators performed fully guided microwave ablation on 24 mandibular second molar tooth buds (#18 and #31) in seven-week-old pigs. Postablation healing assessment consisted of radiographic and histological evaluation of 3 subcohorts (consisting of 4 animals each) at 7-, 14- and 28-days post ablation. Controls were untreated, opposing maxillary second molar tooth buds. Neurological assessment was performed to determine if there was any detectible loss of inferior alveolar nerve function. RESULTS Healing processes were nearly complete at 28 days post ablation. While one tooth bud was identified as partially ablated at 14 days post treatment, all treated tooth bud tissues were replaced with trabecular new bone formation by the end of this study. There was no detectible loss of inferior alveolar nerve function. The thermal dosing strategy used in this study appears to deliver prescribed ablation volumes and-within the context of this animal model-there was no detected collateral tissue damage. CONCLUSIONS The results of this study confirm the hypothesis that healing processes following fully guided tooth bud ablation resulted in removal of targeted tooth bud tissues, complete molar agenesis, and trabecular new bone growth at 28-days post treatment.
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Ono Y, Saito M, Sakamoto K, Maejima Y, Misaka S, Shimomura K, Nakanishi N, Inoue S, Kotani J. C188-9, a specific inhibitor of STAT3 signaling, prevents thermal burn-induced skeletal muscle wasting in mice. Front Pharmacol 2022; 13:1031906. [PMID: 36588738 PMCID: PMC9800842 DOI: 10.3389/fphar.2022.1031906] [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: 08/30/2022] [Accepted: 12/07/2022] [Indexed: 12/23/2022] Open
Abstract
Burn injury is the leading cause of death and disability worldwide and places a tremendous economic burden on society. Systemic inflammatory responses induced by thermal burn injury can cause muscle wasting, a severe involuntary loss of skeletal muscle that adversely affects the survival and functional outcomes of these patients. Currently, no pharmacological interventions are available for the treatment of thermal burn-induced skeletal muscle wasting. Elevated levels of inflammatory cytokines, such as interleukin-6 (IL-6), are important hallmarks of severe burn injury. The levels of signal transducer and activator of transcription 3 (STAT3)-a downstream component of IL-6 inflammatory signaling-are elevated with muscle wasting in various pro-catabolic conditions, and STAT3 has been implicated in the regulation of skeletal muscle atrophy. Here, we tested the effects of the STAT3-specific signaling inhibitor C188-9 on thermal burn injury-induced skeletal muscle wasting in vivo and on C2C12 myotube atrophy in vitro after the administration of plasma from burn model mice. In mice, thermal burn injury severity dependently increased IL-6 in the plasma and tibialis anterior muscles and activated the STAT3 (increased ratio of phospho-STAT3/STAT3) and ubiquitin-proteasome proteolytic pathways (increased Atrogin-1/MAFbx and MuRF1). These effects resulted in skeletal muscle atrophy and reduced grip strength. In murine C2C12 myotubes, plasma from burn mice activated the same inflammatory and proteolytic pathways, leading to myotube atrophy. In mice with burn injury, the intraperitoneal injection of C188-9 (50 mg/kg) reduced activation of the STAT3 and ubiquitin-proteasome proteolytic pathways, reversed skeletal muscle atrophy, and increased grip strength. Similarly, pretreatment of murine C2C12 myotubes with C188-9 (10 µM) reduced activation of the same inflammatory and proteolytic pathways, and ameliorated myotube atrophy induced by plasma taken from burn model mice. Collectively, these results indicate that pharmacological inhibition of STAT3 signaling may be a novel therapeutic strategy for thermal burn-induced skeletal muscle wasting.
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Affiliation(s)
- Yuko Ono
- Department of Disaster and Emergency Medicine, Graduate School of Medicine, Kobe University, Kobe, Japan,Department of Bioregulation and Pharmacological Medicine, School of Medicine, Fukushima Medical University, Fukushima, Japan,*Correspondence: Yuko Ono,
| | - Masafumi Saito
- Department of Disaster and Emergency Medicine, Graduate School of Medicine, Kobe University, Kobe, Japan
| | - Kazuho Sakamoto
- Department of Bio-Informational Pharmacology, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan
| | - Yuko Maejima
- Department of Bioregulation and Pharmacological Medicine, School of Medicine, Fukushima Medical University, Fukushima, Japan
| | - Shingen Misaka
- Department of Bioregulation and Pharmacological Medicine, School of Medicine, Fukushima Medical University, Fukushima, Japan
| | - Kenju Shimomura
- Department of Bioregulation and Pharmacological Medicine, School of Medicine, Fukushima Medical University, Fukushima, Japan
| | - Nobuto Nakanishi
- Department of Disaster and Emergency Medicine, Graduate School of Medicine, Kobe University, Kobe, Japan
| | - Shigeaki Inoue
- Department of Disaster and Emergency Medicine, Graduate School of Medicine, Kobe University, Kobe, Japan
| | - Joji Kotani
- Department of Disaster and Emergency Medicine, Graduate School of Medicine, Kobe University, Kobe, Japan
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Mizugaki A, Wada T, Tsuchida T, Oda Y, Kayano K, Yamakawa K, Tanaka S. Neutrophil phenotypes implicated in the pathophysiology of post-traumatic sepsis. Front Med (Lausanne) 2022; 9:982399. [DOI: 10.3389/fmed.2022.982399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 11/09/2022] [Indexed: 12/05/2022] Open
Abstract
BackgroundThe disruption of immune homeostasis after trauma is a major cause of post-traumatic organ dysfunction and/or sepsis. Recently, a variety of neutrophil phenotypes with distinct functions have been identified and suggested as involved in various clinical conditions. The association between neutrophil phenotypes and post-traumatic immunodeficiency has also been reported, yet the specific neutrophil phenotypes and their functional significance in post-traumatic sepsis have not been fully clarified. Therefore, we sought to investigate neutrophil phenotypic changes in a murine model, as these may hold prognostic value in post-traumatic sepsis.Materials and methodsThird-degree burns affecting 25% of the body surface area were used to establish trauma model, and sepsis was induced 24 h later through cecal ligation and puncture (CLP). The Burn/CLP post-traumatic sepsis model and the Sham/CLP control model were established to assess the immunological status after trauma. Histopathological evaluation was performed on the spleen, liver, kidneys, and lung tissues. Immunological evaluation included the assessment of neutrophil markers using mass cytometry as well as cytokine measurements in serum and ascitic fluid through multiplex analysis using LUMINEX®.ResultsThe Burn/CLP group had a lower survival rate than the Sham/CLP group. Histopathological examination revealed an impaired immune response and more advanced organ damage in the Burn/CLP group. Furthermore, the Burn/CLP group exhibited higher levels of transforming growth factor-beta 1 in the blood and generally lower levels of cytokines than the Sham/CLP group. CD11b, which is involved in neutrophil adhesion and migration, was highly expressed on neutrophils in the Burn/CLP group. The expression of CD172a, which is related to the inhibition of phagocytosis, was also upregulated on neutrophils in the Burn/CLP group. The expression of sialic acid-binding lg-like lectin F and CD68 also differed between the two groups.ConclusionDifferent neutrophil phenotypes were observed between Burn/CLP and Sham/CLP groups, suggesting that neutrophils are implicated in the immune imbalance following trauma. However, further studies are needed to prove the causal relationships between neutrophil phenotypes and outcomes, including survival rate and organ dysfunction.
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Csenkey A, Hargitai E, Pakai E, Kajtar B, Vida L, Lorincz A, Gergics M, Vajda P, Jozsa G, Garami A. Effectiveness of four topical treatment methods in a rat model of superficial partial-thickness burn injury: the advantages of combining zinc-hyaluronan gel with silver foam dressing. Injury 2022; 53:3912-3919. [PMID: 36216616 DOI: 10.1016/j.injury.2022.09.062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 09/01/2022] [Accepted: 09/29/2022] [Indexed: 02/02/2023]
Abstract
BACKGROUND There are several options available for conservative treatment of partial-thickness burns, however, reliable, affordable, and easily obtainable animal testing models are hard to find for the comparison of the different treatment methods. We aimed at developing a preclinical testing model and at comparing four treatment methods for superficial partial-thickness burns. METHODS Burn injury was induced in 90 adult male Wistar rats by placing the 130°C hot tip of a commercially obtainable soldering device for 30 s on the clipped skin of the interscapular region at a steady pressure. Skin histology was studied on days 5, 10, and 22 after the induction of the burn injury, on which days, respectively, the ratio of the not epithelialized wound (%), the extent of re-epithelialization (score), and the scar thickness (µm) were assessed. We compared 4 groups: silver-sulfadiazine cream, zinc-hyaluronan gel, silver foam dressing, and the combination of zinc-hyaluronan gel with a silver foam dressing. RESULTS On day 5, the induction of superficial partial-thickness burn injury was confirmed histologically in the rats. The zinc-hyaluronan gel and the combination treatment resulted in a markedly smaller ratio of the non-epithelialized area (29 ± 10% and 28 ± 13%, respectively) than silver-sulfadiazine cream (69 ± 4%; p < 0.01). On day 10, the extent of re-epithelialization was the lowest (∼0.2) in the silver-sulfadiazine cream group, while the other 3 treatments performed significantly better. The combination treatment lead to the maximal score of 2 in all rats, which was higher than in the other 3 treatment groups. On day 22, the scar thickness was the smallest in the combination treatment group (560 ± 42 µm), which was significantly less than in the silver-sulfadiazine cream group (712 ± 38 µm; p < 0.05). CONCLUSIONS We designed and histologically confirmed a reproducible method for induction of superficial partial-thickness burns in rats for preclinical testing. In our model, the combination of zinc-hyaluronan gel with silver foam dressing was more effective than either of its components alone or than silver-sulfadiazine cream.
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Affiliation(s)
- Alexandra Csenkey
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, Hungary; Department of Paediatrics, Division of Paediatric Surgery, Traumatology, Urology and Paediatric Otolaryngology, Medical School, University of Pecs, Hungary
| | - Emma Hargitai
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, Hungary
| | - Eszter Pakai
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, Hungary
| | - Bela Kajtar
- Department of Pathology, Medical School, University of Pecs, Hungary
| | - Livia Vida
- Department of Pathology, Medical School, University of Pecs, Hungary
| | - Aba Lorincz
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, Hungary
| | - Marin Gergics
- 1st Department of Medicine, Medical School, University of Pecs, Hungary
| | - Peter Vajda
- Department of Paediatrics, Division of Paediatric Surgery, Traumatology, Urology and Paediatric Otolaryngology, Medical School, University of Pecs, Hungary
| | - Gergo Jozsa
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, Hungary; Department of Paediatrics, Division of Paediatric Surgery, Traumatology, Urology and Paediatric Otolaryngology, Medical School, University of Pecs, Hungary.
| | - Andras Garami
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, Hungary
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A Bioluminescence-Based Ex Vivo Burn Wound Model for Real-Time Assessment of Novel Phage-Inspired Enzybiotics. Pharmaceutics 2022; 14:pharmaceutics14122553. [PMID: 36559047 PMCID: PMC9781546 DOI: 10.3390/pharmaceutics14122553] [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: 10/24/2022] [Revised: 11/18/2022] [Accepted: 11/18/2022] [Indexed: 11/23/2022] Open
Abstract
The silent pandemic of antibiotic resistance is thriving, prompting the urgent need for the development of new antibacterial drugs. However, within the preclinical pipeline, in vitro screening conditions can differ significantly from the final in vivo settings. To bridge the gap between in vitro and in vivo assays, we developed a pig-skin-based bioluminescent ex vivo burn wound infection model, enabling real-time assessment of antibacterials in a longitudinal, non-destructive manner. We provide a proof-of-concept for A. baumannii NCTC13423, a multidrug-resistant clinical isolate, which was equipped with the luxCDABE operon as a reporter using a Tn7-based tagging system. This bioluminescence model provided a linear correlation between the number of bacteria and a broad dynamic range (104 to 109 CFU). This longitudinal model was subsequently validated using a fast-acting enzybiotic, 1D10. Since this model combines a realistic, clinically relevant yet strictly controlled environment with real-time measurement of bacterial burden, we put forward this ex vivo model as a valuable tool to assess the preclinical potential of novel phage-inspired enzybiotics.
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