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Shen H, Ma Y, Qiao Y, Zhang C, Chen J, Zhang R. Application of Deferoxamine in Tissue Regeneration Attributed to Promoted Angiogenesis. Molecules 2024; 29:2050. [PMID: 38731540 PMCID: PMC11085206 DOI: 10.3390/molecules29092050] [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: 02/21/2024] [Revised: 04/19/2024] [Accepted: 04/25/2024] [Indexed: 05/13/2024] Open
Abstract
Deferoxamine, an iron chelator used to treat diseases caused by excess iron, has had a Food and Drug Administration-approved status for many years. A large number of studies have confirmed that deferoxamine can reduce inflammatory response and promote angiogenesis. Blood vessels play a crucial role in sustaining vital life by facilitating the delivery of immune cells, oxygen, and nutrients, as well as eliminating waste products generated during cellular metabolism. Dysfunction in blood vessels may contribute significantly to the development of life-threatening diseases. Anti-angiogenesis therapy and pro-angiogenesis/angiogenesis strategies have been frequently recommended for various diseases. Herein, we describe the mechanism by which deferoxamine promotes angiogenesis and summarize its application in chronic wounds, bone repair, and diseases of the respiratory system. Furthermore, we discuss the drug delivery system of deferoxamine for treating various diseases, providing constructive ideas and inspiration for the development of new treatment strategies.
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Affiliation(s)
- Haijun Shen
- Department of Preventive Medicine and Public Health Laboratory Science, School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China; (Y.M.); (Y.Q.); (C.Z.); (J.C.)
| | - Yane Ma
- Department of Preventive Medicine and Public Health Laboratory Science, School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China; (Y.M.); (Y.Q.); (C.Z.); (J.C.)
| | - Yi Qiao
- Department of Preventive Medicine and Public Health Laboratory Science, School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China; (Y.M.); (Y.Q.); (C.Z.); (J.C.)
| | - Chun Zhang
- Department of Preventive Medicine and Public Health Laboratory Science, School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China; (Y.M.); (Y.Q.); (C.Z.); (J.C.)
| | - Jialing Chen
- Department of Preventive Medicine and Public Health Laboratory Science, School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China; (Y.M.); (Y.Q.); (C.Z.); (J.C.)
| | - Ran Zhang
- Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, The Affiliated Cancer Hospital of Nanjing Medical University, No. 42 Baiziting, Nanjing 210009, China
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Song Y, Li Y, Hu W, Li F, Sheng H, Huang C, Gou X, Hou J, Zheng J, Xiao Y. Luminol-conjugated cyclodextrin biological nanoparticles for the treatment of severe burn-induced intestinal barrier disruption. BURNS & TRAUMA 2024; 12:tkad054. [PMID: 38444636 PMCID: PMC10910847 DOI: 10.1093/burnst/tkad054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 10/14/2023] [Accepted: 10/14/2023] [Indexed: 03/07/2024]
Abstract
Background The breakdown of intestinal barrier integrity occurs after severe burn injury and is responsible for the subsequent reactions of inflammation and oxidative stress. A new protective strategy for the intestinal barrier is urgently needed due to the limitations of the traditional methods. Recently, the application of nanoparticles has become one of the promising therapies for many inflammation-related diseases or oxidative damage. Herein, we developed a new anti-inflammatory and antioxidant nanoparticle named luminol-conjugated cyclodextrin (LCD) and aimed to evaluate its protective effects in severe burn-induced intestinal injury. Methods First, LCD nanoparticles, engineered with covalent conjugation between luminol and β-cyclodextrin (β-CD), were synthesized and examined. Then a mouse burn model was successfully established before the mouse body weight, intestinal histopathological manifestation, permeability, tight junction (TJ) expression and pro-inflammatory cytokines were determined in different groups. The proliferation, apoptosis, migration and reactive oxygen species (ROS) of intestinal epithelial cells (IECs) were assessed. Intraepithelial lymphocytes (IELs) were isolated and cultured for analysis by flow cytometry. Results LCD nanoparticle treatment significantly relieved the symptoms of burn-induced intestinal injury in the mouse model, including body weight loss and intestinal permeability abnormalities. Moreover, LCD nanoparticles remarkably recovered the mechanical barrier of the intestine after severe burn, renewed TJ structures, promoted IEC proliferation and migration, and inhibited IEC apoptosis. Mechanistically, LCD nanoparticles dramatically alleviated pro-inflammation factors (tumor necrosis factor-α, IL-17A) and ROS accumulation, which could be highly involved in intestinal barrier disruption. Furthermore, an increase in IL-17A and the proportion of IL-17A+Vγ4+ γδ T subtype cells was also observed in vitro in LPS-treated Vγ4+ γδ T cells, but the use of LCD nanoparticles suppressed this increase. Conclusions Taken together, these findings demonstrate that LCD nanoparticles have the protective ability to ameliorate intestinal barrier disruption and provide a therapeutic intervention for burn-induced intestinal injury.
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Affiliation(s)
- Yajun Song
- Department of Urology, Xinqiao Hospital, The Army Medical University, No. 184, Xinqiao Street, Shapingba District, Chongqing, 400037, China
| | - Yang Li
- Department of Urology, Xinqiao Hospital, The Army Medical University, No. 184, Xinqiao Street, Shapingba District, Chongqing, 400037, China
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, No. 1, Yuanjiagang Road, Yuzhong District, Chongqing, 400016, China
| | - Wengang Hu
- Department of Urology, Xinqiao Hospital, The Army Medical University, No. 184, Xinqiao Street, Shapingba District, Chongqing, 400037, China
- Institute of Burn Research, Southwest Hospital, State Key Laboratory of Trauma, Burn and Combined Injury, Chongqing Key Laboratory for Disease Proteomics, Army Military Medical University, No. 30, Gaotanyan Street, Shapingba District, Chongqing, 400038, China
| | - Feng Li
- Department of Urology, Chongqing University Three Gorges Hospital, No. 165, Xincheng Road, Wanzhou District, Chongqing, 404031, China
| | - Hao Sheng
- Department of Urology, Xinqiao Hospital, The Army Medical University, No. 184, Xinqiao Street, Shapingba District, Chongqing, 400037, China
| | - Chibing Huang
- Department of Urology, Xinqiao Hospital, The Army Medical University, No. 184, Xinqiao Street, Shapingba District, Chongqing, 400037, China
| | - Xin Gou
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, No. 1, Yuanjiagang Road, Yuzhong District, Chongqing, 400016, China
| | - Jingming Hou
- Department of Rehabilitation, Southwest Hospital, The Army Medical University, No. 30, Gaotanyan Street, Shapingba District, Chongqing, 400038, China
| | - Ji Zheng
- Department of Urology, Xinqiao Hospital, The Army Medical University, No. 184, Xinqiao Street, Shapingba District, Chongqing, 400037, China
| | - Ya Xiao
- Department of Urology, Xinqiao Hospital, The Army Medical University, No. 184, Xinqiao Street, Shapingba District, Chongqing, 400037, China
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Zhao Y, Liu J, Ding Z, Ge W, Wang S, Zhang J. ATP-induced hypothermia improves burn injury and relieves burn pain in mice. J Therm Biol 2023; 114:103563. [PMID: 37344025 DOI: 10.1016/j.jtherbio.2023.103563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 03/05/2023] [Accepted: 04/02/2023] [Indexed: 06/23/2023]
Abstract
Thermal burn injury is a severe and life-threatening form of trauma that presents a significant challenge to clinical therapy. Therapeutic hypothermia has been shown to be beneficial in various human pathologies. Adenosine triphosphate (ATP) induces a hypothermic state that resembles hibernation-like suspended animation in mammals. This study investigates the potential protective role of ATP-induced hypothermia in thermal burn injury. Male C57BL/6 mice underwent a sham procedure or third-degree burn, and ATP-induced hypothermia was applied immediately or 1 h after burn injury. Our results show that ATP-induced hypothermia significantly improved burn depth progression and reduced collagen degradation. Moreover, hypothermia induced by ATP alleviated burn-induced hyperinflammatory responses and oxidative stress. Metabolomic profiling revealed that ATP-induced hypothermia reversed the shifts of metabolic profiles of the skin in burn mice. In addition, ATP-induced hypothermia relieved nociceptive and inflammatory pain, as observed in the antinociceptive test. Our findings suggest that ATP-induced hypothermia attenuates burn injury and provides new insights into first-aid therapy after thermal burn injury.
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Affiliation(s)
- Yang Zhao
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China
| | - Junhao Liu
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China
| | - Zhao Ding
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China
| | - Wenhao Ge
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China
| | - Shiming Wang
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China
| | - Jianfa Zhang
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China.
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Huang L, Wang Q, Huang C, Zhou Z, Peng A, Zhang Z. Untargeted Metabolomic Analysis in Endolymphatic Sac Luminal Fluid from Patients with Meniere's Disease. J Assoc Res Otolaryngol 2023; 24:239-251. [PMID: 36715893 PMCID: PMC10121990 DOI: 10.1007/s10162-023-00887-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 12/23/2022] [Indexed: 01/31/2023] Open
Abstract
Dysfunction of the endolymphatic sac (ES) is one of the etiologies of Meniere's disease (MD), the mechanism of which remains unclear. The aim of the present study was to explore the molecular pathological characteristics of ES during the development of MD. Metabolomic profiling of ES luminal fluid from patients with MD and patients with acoustic neuroma (AN) was performed. Diluted ES luminal fluid (ELF) samples were obtained from 10 patients who underwent endolymphatic duct blockage for the treatment of intractable MD and from 6 patients who underwent translabyrinthine surgery for AN. ELF analysis was performed using liquid chromatography-mass spectrometry before the raw data were normalized and subjected to subsequent statistical analysis by MetaboAnalyst. Using thresholds of P ≤ 0.05 and variable important in projection > 1, a total of 111 differential metabolites were screened in the ELF, including 52 metabolites in negative mode and 59 in positive mode. Furthermore, 15 differentially altered metabolites corresponding to 15 compound names were identified using a Student's t-test, including 7 significant increased metabolites and 8 significant decreased metabolites. Moreover, two differentially altered metabolites, hyaluronic acid (HA) and 4-hydroxynonenal (4-HNE), were validated to be upregulated in the epithelial lining of the ES, as well as in the subepithelial connective-tissue in patients with MD comparing with that in patients with AN. Among these differentially altered metabolites, an upregulated expression of HA detected in the ES lumen of the patients with MD was supposed to be associated with the increased endolymph in ES, while an increased level of 4-HNE found in the ELF of the patients with MD provided direct evidence to support that oxidative damage and inflammatory lesions underlie the mechanism of MD. Furthermore, citrate and ethylenediaminetetraacetic acid were detected to be decreased substantially in the ELF of the patients with MD, suggesting the elevated endolymphatic Ca2+ in the ears with chronic endolymphatic hydrops is likely to be associated with the reduction of these two chelators of Ca2+ in ES. The results in the present study indicate metabolomic analysis in the ELF of the patients with MD can potentially improve our understanding on the molecular pathophysiological mechanism in the ES during the development of MD.
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Affiliation(s)
- Li Huang
- Department of Otolaryngology-Head and Neck Surgery, The Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan China
| | - Qin Wang
- Department of Otolaryngology-Head and Neck Surgery, The Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan China
| | - Chao Huang
- Department of Otolaryngology-Head and Neck Surgery, The Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan China
| | - Zhou Zhou
- Department of Otolaryngology-Head and Neck Surgery, The Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan China
| | - Anquan Peng
- Department of Otolaryngology-Head and Neck Surgery, The Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan China
| | - Zhiwen Zhang
- Department of Otolaryngology-Head and Neck Surgery, The Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan China
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Zhao M, Zhang Y, Zhao H. Identification of ferroptosis-related genes and predicted overall survival in patients with burns. Front Surg 2023; 9:1060036. [PMID: 36700031 PMCID: PMC9869674 DOI: 10.3389/fsurg.2022.1060036] [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: 10/02/2022] [Accepted: 11/29/2022] [Indexed: 01/11/2023] Open
Abstract
Introduction Burns are a common trauma associated with considerable mortality and morbidity. Although a lot is known regarding burns' pathogenesis, the involvement of ferroptosis is uncertain. Here, we aimed to explore vital ferroptosis-related genes and molecules in burns, through bioinformatics analysis, to uncover new effective therapeutic targets. Methods The FerrDb database was used to acquire ferroptosis-related genes and GSE19743 was downloaded from Gene Expression Omnibus (GEO), a dataset with analysis of control and burned individuals. Hub genes were selected with Cytoscape software, and Gene Ontology (GO), and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses were conducted. Cox proportional hazard function and Kaplan-Meier survival analyses were implemented to screen prognosis-related genes. Additionally, the miRWalk database was used to acquire the miRNAs relevant to our hub genes function and analyzed for enrichment. Result We identified 64 differentially expressed genes and through the intersection with ferroptosis-related genes, 10 were selected as hub genes. GO analysis revealed that the hub genes' most enriched activities were response to oxidative stress, pyridine-containing compound metabolic processes, and reactive oxygen species metabolic processes. KEGG pathways' analysis showed that these overlapped genes were enriched in several pathways, namely, in VEGF signaling. Furthermore, the molecular miRNA functions significantly enriched were signal transduction and cell communication, namely, the biological pathways of the glypican pathway and the ErbB receptor signaling network. SLC40A1 and GPT2 genes were found to be associated with overall survival, suggesting an important role in burn prognosis. Discussion This study may improve our understanding of the underlying burn mechanisms and provide a new direction for the prevention of poor outcomes, advances in burns treatment, and drug development.
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Affiliation(s)
- Mingjian Zhao
- Graduate School, Dalian Medical University, Dalian, China
| | - Yetong Zhang
- Graduate School, Dalian Medical University, Dalian, China
| | - Hongliang Zhao
- Department of Burns and Plastic Surgery, Miyun Hospital, Capital Medical University, Beijing, China,Correspondence: Hongliang Zhao
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Wu D, Su S, Zha X, Wei Y, Yang G, Huang Q, Yang Y, Xia L, Fan S, Peng X. Glutamine promotes O-GlcNAcylation of G6PD and inhibits AGR2 S-glutathionylation to maintain the intestinal mucus barrier in burned septic mice. Redox Biol 2022; 59:102581. [PMID: 36565645 PMCID: PMC9800542 DOI: 10.1016/j.redox.2022.102581] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 12/15/2022] [Accepted: 12/18/2022] [Indexed: 12/24/2022] Open
Abstract
Mucus forms the first line of defence of the intestinal mucosa barrier, and mucin is its core component. Glutamine is a vital energy substance for goblet cells; it can promote mucus synthesis and alleviate damage to the intestinal mucus barrier after burn injury, but its mechanism is not fully understood. This study focused on the molecular mechanisms underlying the effects of glutamine on the synthesis and modification of mucin 2 (MUC2) by using animal and cellular models of burn sepsis. We found that anterior gradient-2 (AGR2) plays a key role in the posttranslational modification of MUC2. Oxidative stress induced by burn sepsis enhanced the S-glutathionylation of AGR2, interfered with the processing and modification of MUC2 precursors by AGR2 and blocked the synthesis of mature MUC2. Further studies revealed that NADPH, catalysed by glucose-6-phosphate dehydrogenase (G6PD), is a key molecule in inhibiting oxidative stress and regulating AGR2 activity. Glutamine promotes O-linked N-acetylglucosamine (O-GlcNAc) modification of G6PD via the hexosamine pathway, which facilitates G6PD homodimer formation and increases NADPH synthesis, thereby inhibiting AGR2 S-glutathionylation and promoting MUC2 maturation, ultimately reducing damage to the intestinal mucus barrier after burn sepsis. Overall, we have demonstrated that the central mechanisms of glutamine in promoting MUC2 maturation and maintaining the intestinal mucus barrier are the enhancement of G6PD glycosylation and inhibition of AGR2 S-glutathionylation.
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Affiliation(s)
- Dan Wu
- Clinical Medical Research Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.
| | - Sen Su
- Clinical Medical Research Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.
| | - Xule Zha
- Clinical Medical Research Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.
| | - Yan Wei
- Clinical Medical Research Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.
| | - Gang Yang
- Clinical Medical Research Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.
| | - Qianying Huang
- Clinical Medical Research Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.
| | - Yongjun Yang
- Clinical Medical Research Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.
| | - Lin Xia
- Clinical Medical Research Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.
| | - Shijun Fan
- Clinical Medical Research Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.
| | - Xi Peng
- Clinical Medical Research Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China; Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China; Shriners Burns Hospital, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
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Transcriptional and genetic alterations of cuproptosis-related genes correlated to malignancy and immune-infiltrate of esophageal carcinoma. Cell Death Dis 2022; 8:370. [PMID: 35995782 PMCID: PMC9395517 DOI: 10.1038/s41420-022-01164-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 08/04/2022] [Accepted: 08/10/2022] [Indexed: 01/10/2023]
Abstract
Esophageal carcinoma (ESCA) is a common type of cancer with high mortality. Cuproptosis is a new type of cell death and is characterized by the dependence on mitochondrial respiration and protein lipoylation. However, the potential roles of cuproptosis-related genes (CRGs) in ESCA remain elusive. Here, we systematically assessed the transcriptional and genetic alterations of CRGs in ESCA. We identified a CRGs signature for ESCA patients. A 6-CRGs signature was constructed by the least absolute shrinkage and selection operator (LASSO) regression analysis along with the univariate cox regression analysis and differential genes analysis. The CRGs score could significantly stratify ESCA patients’ survival and a high CRGs score was significantly correlated with worse overall survival. Moreover, higher CRGs score indicated higher pathology grades and aberrant cell adhesion, possibly via the PI3K-AKT pathway, which could also underly their increased sensitivity to PI3K-AKT pathway inhibitors. In addition, patients with high CRGs tend to hold more mutation load and abnormal APOBEC mutation. Notably, a higher CRGs score was anomalously associated with more immune infiltration, which could explain its malignancy by increased PD-L1 stability and a higher proportion of bystander T cells. In conclusion, our report revealed the significance of cuproptosis in ESCA and may have therapeutic potential in activating the bystander T cells.
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Palackic A, Jay JW, Duggan RP, Branski LK, Wolf SE, Ansari N, El Ayadi A. Therapeutic Strategies to Reduce Burn Wound Conversion. Medicina (B Aires) 2022; 58:medicina58070922. [PMID: 35888643 PMCID: PMC9315582 DOI: 10.3390/medicina58070922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 07/02/2022] [Accepted: 07/08/2022] [Indexed: 11/16/2022] Open
Abstract
Burn wound conversion refers to the phenomenon whereby superficial burns that appear to retain the ability to spontaneously heal, convert later into deeper wounds in need of excision. While no current treatment can definitively stop burn wound conversion, attempts to slow tissue damage remain unsatisfactory, justifying the need for new therapeutic interventions. To attenuate burn wound conversion, various studies have targeted at least one of the molecular mechanisms underlying burn wound conversion, including ischemia, inflammation, apoptosis, autophagy, generation of reactive oxygen species, hypothermia, and wound rehydration. However, therapeutic strategies that can target various mechanisms involved in burn wound conversion are still lacking. This review highlights the pathophysiology of burn wound conversion and focuses on recent studies that have turned to the novel use of biologics such as mesenchymal stem cells, biomaterials, and immune regulators to mitigate wound conversion. Future research should investigate mechanistic pathways, side effects, safety, and efficacy of these different treatments before translation into clinical studies.
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Affiliation(s)
- Alen Palackic
- Department of Surgery, University of Texas Medical Branch, Galveston, TX 77555, USA; (A.P.); (J.W.J.); (R.P.D.); (L.K.B.); (S.E.W.)
- Division of Plastic, Aesthetic and Reconstructive Surgery, Department of Surgery, Medical University of Graz, A-8036 Graz, Austria
| | - Jayson W. Jay
- Department of Surgery, University of Texas Medical Branch, Galveston, TX 77555, USA; (A.P.); (J.W.J.); (R.P.D.); (L.K.B.); (S.E.W.)
| | - Robert P. Duggan
- Department of Surgery, University of Texas Medical Branch, Galveston, TX 77555, USA; (A.P.); (J.W.J.); (R.P.D.); (L.K.B.); (S.E.W.)
| | - Ludwik K. Branski
- Department of Surgery, University of Texas Medical Branch, Galveston, TX 77555, USA; (A.P.); (J.W.J.); (R.P.D.); (L.K.B.); (S.E.W.)
| | - Steven E. Wolf
- Department of Surgery, University of Texas Medical Branch, Galveston, TX 77555, USA; (A.P.); (J.W.J.); (R.P.D.); (L.K.B.); (S.E.W.)
| | - Naseem Ansari
- Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, TX 77555, USA;
| | - Amina El Ayadi
- Department of Surgery, University of Texas Medical Branch, Galveston, TX 77555, USA; (A.P.); (J.W.J.); (R.P.D.); (L.K.B.); (S.E.W.)
- Correspondence:
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Weiss F, Agua K, Weinzierl A, Schuldt A, Egana JT, Schlitter AM, Steiger K, Machens HG, Harder Y, Schmauss D. A modified burn comb model with a new dorsal frame that allows for local treatment in partial-thickness burns in rats. J Burn Care Res 2022; 43:1329-1336. [PMID: 35259276 DOI: 10.1093/jbcr/irac032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Burn wound progression (BWP) leads to vertical and horizontal injury extension. The "burn comb model" is commonly used, in which a full-thickness burn with intercalated unburned interspaces is induced. We aimed to establish an injury progressing to the intermediate dermis, allowing repeated wound evaluation. Furthermore, we present a new dorsal frame that enables topical drug application. 8 burn field and 6 interspaces were induced on each of 17 rats' dorsa with a 10-second burn comb application. A developed 8-panel aluminum frame was sutured onto 12 animals and combined with an Elizabethan collar. Over 14 days, macroscopic & histologic wound assessment and Laser-Speckle-Contrast-Imaging (LSCI) were performed besides evaluation of frame durability. The 10-second group was compared to 9 animals injured with a full-thickness 60-second model. Frame durability was sufficient up to day 4 with 8 of 12 frames (67%) still mounted. The 60-second burn led to an increased extent of interspace necrosis (p=0.002). The extent of necrosis increased between days 1 and 2 (p=0.001), following the 10-second burn (24%±SEM 8% to 40%±SEM 6%) and the 60-second burn (57%±SEM 6% to 76%±SEM 4%). Interspace LSCI perfusion was higher than burn field perfusion. It earlier reached baseline levels in the 10-second group (on day 1: 142%±SEM 9% vs. 60%±SEM 5%; p<0.001). Within day 1, the 10-second burn showed histological progression to the intermediate dermis, both in interspaces and burn fields. This burn comb model with its newly developed fixed dorsal frame allows investigation of topical agents to treat BWP in partial-thickness burns.
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Affiliation(s)
- Fabian Weiss
- Department of Plastic Surgery and Hand Surgery, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany
| | - Kariem Agua
- Department of Plastic Surgery and Hand Surgery, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany
| | - Andrea Weinzierl
- Department of Plastic Surgery and Hand Surgery, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany.,Department of Plastic, Reconstructive and Aesthetic Surgery, Ente Ospedaliero Cantonale (EOC), Lugano, Switzerland
| | - Anna Schuldt
- Department of Plastic Surgery and Hand Surgery, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany
| | - Jose Tomas Egana
- Department of Plastic Surgery and Hand Surgery, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany.,Institute for Biological and Medical Engineering, Schools of Engineering, Medicine and Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Anna Melissa Schlitter
- Institute of Pathology, School of Medicine, Technische Universität München, Munich, Germany
| | - Katja Steiger
- Institute of Pathology, School of Medicine, Technische Universität München, Munich, Germany
| | - Hans-Günther Machens
- Department of Plastic Surgery and Hand Surgery, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany
| | - Yves Harder
- Department of Plastic Surgery and Hand Surgery, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany.,Department of Plastic, Reconstructive and Aesthetic Surgery, Ente Ospedaliero Cantonale (EOC), Lugano, Switzerland.,Faculty of Biomedical Sciences, Università della Svizzera Italiana (USI), Lugano, Switzerland
| | - Daniel Schmauss
- Department of Plastic Surgery and Hand Surgery, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany.,Department of Plastic, Reconstructive and Aesthetic Surgery, Ente Ospedaliero Cantonale (EOC), Lugano, Switzerland.,Faculty of Biomedical Sciences, Università della Svizzera Italiana (USI), Lugano, Switzerland
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