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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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Wang F, Chen FF, Gao WB, Wang HY, Zhao NW, Xu M, Gao DY, Yu W, Yan XL, Zhao JN, Li XJ. Identification of citrullinated peptides in the synovial fluid of patients with rheumatoid arthritis using LC-MALDI-TOF/TOF. Clin Rheumatol 2016; 35:2185-94. [PMID: 27060082 PMCID: PMC4989008 DOI: 10.1007/s10067-016-3247-4] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 01/11/2016] [Accepted: 03/23/2016] [Indexed: 12/11/2022]
Abstract
The objective of the study is to investigate potential citrullinated autoantigens as targets of anti-citrullinated protein antibodies (ACPAs) response in synovial fluids (SFs) of patients with rheumatoid arthritis (RA). SFs from six RA patients and six osteoarthritis (OA) patients as controls were collected. The citrullinated proteins in SFs were extracted by immunoprecipitation with rabbit anti-citrulline antibodies. Matrix-assisted laser desorption/ionization time of flight mass spectrometry/time of flight mass spectrometry (MALDI-TOF/TOF) mass spectrometry was subsequently performed to discover a characteristic neutral loss to finally determine citrullinated autoantigens. A total of 182 citrullinated peptides and 200 citrullinated sites were identified in RA SFs, while 3 citrullinated peptides and 4 citrullinated sites were identified in OA SFs. The 182 citrullinated peptides from RA SFs and the 3 citrullinated peptides from OA SFs were derived from 83 and 3 autoantigens, respectively. Eighty-three autoantigens except protein-arginine deiminase type-2 (PADI2) and protein-arginine deiminase type-2 (PADI4) were over-citrullinated compared with controls, and the citrullinated sites of PADI2 and PADI4 were different in two groups. Interestingly, citrullinated histone H3.3 (H3F3A) was found in OA controls, but not in RA groups. The differential citrullinated proteins identified in RA SFs suggested potential autoantigens were targeted for ACPAs response and might contribute to the induction and perpetuation of complement activation and joint inflammation in RA.
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Affiliation(s)
- Fei Wang
- Institute of Clinical Laboratory Science, Jinling Hospital, School of Medicine, Nanjing University, 305 East Zhongshan Road, Nanjing, 210002, China
| | - Fang-Fang Chen
- Institute of Clinical Laboratory Science, Jinling Hospital, School of Medicine, Nanjing University, 305 East Zhongshan Road, Nanjing, 210002, China
| | - Wen-Bo Gao
- Institute of Clinical Laboratory Science, Jinling Hospital, School of Medicine, Nanjing University, 305 East Zhongshan Road, Nanjing, 210002, China
| | - Hai-Yong Wang
- Institute of Clinical Laboratory Science, Jinling Hospital, School of Medicine, Nanjing University, 305 East Zhongshan Road, Nanjing, 210002, China
| | - Ning-Wei Zhao
- Biomedical Research Laboratory, Shimadzu (China) Co., Ltd., Shanghai, 200052, China
| | - Min Xu
- Institute of Clinical Laboratory Science, Jinling Hospital, School of Medicine, Nanjing University, 305 East Zhongshan Road, Nanjing, 210002, China
| | - De-Yu Gao
- Institute of Clinical Laboratory Science, Jinling Hospital, School of Medicine, Nanjing University, 305 East Zhongshan Road, Nanjing, 210002, China
| | - Wei Yu
- Institute of Clinical Laboratory Science, Jinling Hospital, School of Medicine, Nanjing University, 305 East Zhongshan Road, Nanjing, 210002, China
| | - Xiao-Ling Yan
- Institute of Clinical Laboratory Science, Jinling Hospital, School of Medicine, Nanjing University, 305 East Zhongshan Road, Nanjing, 210002, China
| | - Jian-Ning Zhao
- Department of Osteology, Jinling Hospital, School of Medicine, Nanjing University, 305 East Zhongshan Road, Nanjing, 210002, China
| | - Xiao-Jun Li
- Institute of Clinical Laboratory Science, Jinling Hospital, School of Medicine, Nanjing University, 305 East Zhongshan Road, Nanjing, 210002, China. .,State Key Laboratory of Analytical Chemistry for Life Science, Department of Chemistry, Nanjing University, Nanjing, 210093, China.
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Animal models in burn research. Cell Mol Life Sci 2014; 71:3241-55. [PMID: 24714880 DOI: 10.1007/s00018-014-1612-5] [Citation(s) in RCA: 252] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Revised: 03/14/2014] [Accepted: 03/17/2014] [Indexed: 01/08/2023]
Abstract
Burn injury is a severe form of trauma affecting more than 2 million people in North America each year. Burn trauma is not a single pathophysiological event but a devastating injury that causes structural and functional deficits in numerous organ systems. Due to its complexity and the involvement of multiple organs, in vitro experiments cannot capture this complexity nor address the pathophysiology. In the past two decades, a number of burn animal models have been developed to replicate the various aspects of burn injury, to elucidate the pathophysiology, and to explore potential treatment interventions. Understanding the advantages and limitations of these animal models is essential for the design and development of treatments that are clinically relevant to humans. This review aims to highlight the common animal models of burn injury in order to provide investigators with a better understanding of the benefits and limitations of these models for translational applications. While many animal models of burn exist, we limit our discussion to the skin healing of mouse, rat, and pig. Additionally, we briefly explain hypermetabolic characteristics of burn injury and the animal model utilized to study this phenomena. Finally, we discuss the economic costs associated with each of these models in order to guide decisions of choosing the appropriate animal model for burn research.
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Yan SH, Zhao NW, Zhu XX, Wang Q, Wang HD, Fu R, Sun Y, Li QY. Benazepril inhibited the NF-κB and TGF-β networking on LV hypertrophy in rats. Immunol Lett 2013; 152:126-34. [PMID: 23707880 DOI: 10.1016/j.imlet.2013.05.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Revised: 04/26/2013] [Accepted: 05/08/2013] [Indexed: 11/28/2022]
Abstract
PURPOSE Benazepril, an angiotensin-converting enzyme (ACE) inhibitor, has been used to treat hypertension, congestive heart failure, and chronic renal failure. However, its biological activity and mechanism of action in inflammation are not fully identified. The present study was designed to determine the in vivo anti-inflammatory effects of benazepril on LV hypertrophy in rats. METHODS LV hypertrophy was produced in rats by abdominal aortic coarctation. They were then divided into the following groups: sham operation; LV hypertrophy; LV hypertrophy+benazepril (1mg/kg in a gavage, once a day for 4 weeks). Both morphological assays (hemodynamic and hemorheological measurement; LV hypertrophy assessment), and molecular assays (protein levels of Collagen type I/III, TNF-α and VCAM-1; TGF-β gene expression; NF-κB or Smad activation; intracellular ROS production) were performed. RESULTS The following effects were observed in rats treated with benazepril: (1) marked improvements in hemodynamic and hemorheological parameters; (2) significant reductions in LV hypertrophy, dilatation and fibrosis; (3) significantly attenuated protein levels of Collagen type I/III, TGF-β, TNF-α and VCAM-1, NF-κB or Smad activation, as well as intracellular ROS production. CONCLUSIONS These results suggest that the anti-inflammatory properties of benazepril may be ascribed to their down-regulation of both NF-κB and TGF-β signaling pathways by acting on the intracellular ROS production in rats with LV hypertrophy, thus supporting the use of benazepril as an anti-inflammatory agent.
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Affiliation(s)
- Shi-Hai Yan
- Department of Pharmacology, Jiangsu Provincial Hospital of Traditional Chinese Medicine (TCM), Nanjing, China
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