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Mladinich MC, Himmler GE, Conde JN, Gorbunova EE, Schutt WR, Sarkar S, Tsirka SAE, Kim HK, Mackow ER. Age-dependent Powassan virus lethality is linked to glial cell activation and divergent neuroinflammatory cytokine responses in a murine model. J Virol 2024:e0056024. [PMID: 39087762 DOI: 10.1128/jvi.00560-24] [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: 03/27/2024] [Accepted: 05/27/2024] [Indexed: 08/02/2024] Open
Abstract
Powassan virus (POWV) is an emergent tick-borne flavivirus that causes fatal encephalitis in the elderly and long-term neurologic sequelae in survivors. How age contributes to severe POWV encephalitis remains an enigma, and no animal models have assessed age-dependent POWV neuropathology. Inoculating C57BL/6 mice with a POWV strain (LI9) currently circulating in Ixodes ticks resulted in age-dependent POWV lethality 10-20 dpi. POWV infection of 50-week-old mice was 82% fatal with lethality sequentially reduced by age to 7.1% in 10-week-old mice. POWV LI9 was neuroinvasive in mice of all ages, causing acute spongiform CNS pathology and reactive gliosis 5-15 dpi that persisted in survivors 30 dpi. High CNS viral loads were found in all mice 10 dpi. However, by 15 dpi, viral loads decreased by 2-4 logs in 10- to 40-week-old mice, while remaining at high levels in 50-week-old mice. Age-dependent differences in CNS viral loads 15 dpi occurred concomitantly with striking changes in CNS cytokine responses. In the CNS of 50-week-old mice, POWV induced Th1-type cytokines (IFNγ, IL-2, IL-12, IL-4, TNFα, IL-6), suggesting a neurodegenerative pro-inflammatory M1 microglial program. By contrast, in 10-week-old mice, POWV-induced Th2-type cytokines (IL-10, TGFβ, IL-4) were consistent with a neuroprotective M2 microglial phenotype. These findings correlate age-dependent CNS cytokine responses and viral loads with POWV lethality and suggest potential neuroinflammatory therapeutic targets. Our results establish the age-dependent lethality of POWV in a murine model that mirrors human POWV severity and long-term CNS pathology in the elderly. IMPORTANCE Powassan virus is an emerging tick-borne flavivirus causing lethal encephalitis in aged individuals. We reveal an age-dependent POWV murine model that mirrors human POWV encephalitis and long-term CNS damage in the elderly. We found that POWV is neuroinvasive and directs reactive gliosis in all age mice, but at acute stages selectively induces pro-inflammatory Th1 cytokine responses in 50-week-old mice and neuroprotective Th2 cytokine responses in 10-week-old mice. Our findings associate CNS viral loads and divergent cytokine responses with age-dependent POWV lethality and survival outcomes. Responses of young mice suggest potential therapeutic targets and approaches for preventing severe POWV encephalitis that may be broadly applicable to other neurodegenerative diseases. Our age-dependent murine POWV model permits analysis of vaccines that prevent POWV lethality, and therapeutics that resolve severe POWV encephalitis.
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Affiliation(s)
- Megan C Mladinich
- Department of Microbiology and Immunology, Center for Infectious Disease, Stony Brook, New York, USA
| | - Grace E Himmler
- Department of Microbiology and Immunology, Center for Infectious Disease, Stony Brook, New York, USA
| | - Jonas N Conde
- Department of Microbiology and Immunology, Center for Infectious Disease, Stony Brook, New York, USA
| | - Elena E Gorbunova
- Department of Microbiology and Immunology, Center for Infectious Disease, Stony Brook, New York, USA
| | - William R Schutt
- Department of Microbiology and Immunology, Center for Infectious Disease, Stony Brook, New York, USA
| | - Shayan Sarkar
- Department of Pathology, Renaissance School of Medicine, Stony Brook University, Stony Brook, New York, USA
| | - Styliani-Anna E Tsirka
- Department of Pharmacological Sciences, Renaissance School of Medicine, Stony Brook University, Stony Brook, New York, USA
| | - Hwan Keun Kim
- Department of Microbiology and Immunology, Center for Infectious Disease, Stony Brook, New York, USA
| | - Erich R Mackow
- Department of Microbiology and Immunology, Center for Infectious Disease, Stony Brook, New York, USA
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Kelly LS, Munley JA, Pons EE, Kannan KB, Whitley EM, Bible LE, Efron PA, Mohr AM. A rat model of multicompartmental traumatic injury and hemorrhagic shock induces bone marrow dysfunction and profound anemia. Animal Model Exp Med 2024; 7:367-376. [PMID: 38860566 PMCID: PMC11228100 DOI: 10.1002/ame2.12447] [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: 03/09/2024] [Revised: 05/06/2024] [Accepted: 05/25/2024] [Indexed: 06/12/2024] Open
Abstract
BACKGROUND Severe trauma is associated with systemic inflammation and organ dysfunction. Preclinical rodent trauma models are the mainstay of postinjury research but have been criticized for not fully replicating severe human trauma. The aim of this study was to create a rat model of multicompartmental injury which recreates profound traumatic injury. METHODS Male Sprague-Dawley rats were subjected to unilateral lung contusion and hemorrhagic shock (LCHS), multicompartmental polytrauma (PT) (unilateral lung contusion, hemorrhagic shock, cecectomy, bifemoral pseudofracture), or naïve controls. Weight, plasma toll-like receptor 4 (TLR4), hemoglobin, spleen to body weight ratio, bone marrow (BM) erythroid progenitor (CFU-GEMM, BFU-E, and CFU-E) growth, plasma granulocyte colony-stimulating factor (G-CSF) and right lung histologic injury were assessed on day 7, with significance defined as p values <0.05 (*). RESULTS Polytrauma resulted in markedly more profound inhibition of weight gain compared to LCHS (p = 0.0002) along with elevated plasma TLR4 (p < 0.0001), lower hemoglobin (p < 0.0001), and enlarged spleen to body weight ratios (p = 0.004). Both LCHS and PT demonstrated suppression of CFU-E and BFU-E growth compared to naïve (p < 0.03, p < 0.01). Plasma G-CSF was elevated in PT compared to both naïve and LCHS (p < 0.0001, p = 0.02). LCHS and PT demonstrated significant histologic right lung injury with poor alveolar wall integrity and interstitial edema. CONCLUSIONS Multicompartmental injury as described here establishes a reproducible model of multicompartmental injury with worsened anemia, splenic tissue enlargement, weight loss, and increased inflammatory activity compared to a less severe model. This may serve as a more effective model to recreate profound traumatic injury to replicate the human inflammatory response postinjury.
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Affiliation(s)
- Lauren S. Kelly
- Department of Surgery and Sepsis and Critical Illness Research CenterUniversity of Florida College of MedicineGainesvilleFloridaUSA
| | - Jennifer A. Munley
- Department of Surgery and Sepsis and Critical Illness Research CenterUniversity of Florida College of MedicineGainesvilleFloridaUSA
| | - Erick E. Pons
- Department of Surgery and Sepsis and Critical Illness Research CenterUniversity of Florida College of MedicineGainesvilleFloridaUSA
| | - Kolenkode B. Kannan
- Department of Surgery and Sepsis and Critical Illness Research CenterUniversity of Florida College of MedicineGainesvilleFloridaUSA
| | | | - Letitia E. Bible
- Department of Surgery and Sepsis and Critical Illness Research CenterUniversity of Florida College of MedicineGainesvilleFloridaUSA
| | - Philip A. Efron
- Department of Surgery and Sepsis and Critical Illness Research CenterUniversity of Florida College of MedicineGainesvilleFloridaUSA
| | - Alicia M. Mohr
- Department of Surgery and Sepsis and Critical Illness Research CenterUniversity of Florida College of MedicineGainesvilleFloridaUSA
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Zhang B, Fu T, Han Y, Li G, Wan X, Li Y. Experimental study of a novel mouse model of tibial shaft fracture combined with blunt chest trauma. Animal Model Exp Med 2024. [PMID: 38225728 DOI: 10.1002/ame2.12379] [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: 07/05/2023] [Accepted: 12/15/2023] [Indexed: 01/17/2024] Open
Abstract
BACKGROUD Thoracic Trauma and Limb Fractures Are the Two most Common Injuries in Multiple Trauma. However, there Is Still a Lack of Mouse Models of Trauma Combining Tibial Shaft Fracture (TSF) and Thoracic Trauma. In this Study, we Attempted to Develop a Novel Mouse Model of TSF Combined with Blunt Chest Trauma (BCT). METHODS A total of 84 C57BL/6J male mice were used as the multiple trauma model. BCT was induced by hitting the chests of mice with heavy objects, and TSF was induced by hitting the tibia of mice with heavy objects after intramedullary fixation. Serum specimens of mice were received by cardiac puncture at defined time points of 0, 6, 12, 24, 48, and 72 h. RESULTS Body weight and body temperature tended to decrease within 24 h after multiple trauma. Hemoglobin analyses revealed a decrease during the first 24 h after multiple trauma. Some animals died by cardiac puncture immediately after chest trauma. These animals exhibited the most severe pulmonary contusion and hemorrhage. The level of lung damage varied in diverse mice but was apparent in all animals. Classic hematoxylin and eosin (H&E)-stained paraffin pulmonary sections of mice with multiple trauma displayed hemorrhage and an immunoinflammatory reaction. Bronchoalveolar lavage fluid (BALF) and serum samples of mice with multiple trauma showed an upregulation of interleukin-1β (IL-1β), IL-6, and tumor necrosis factor-1α (TNF-1α) compared with the control group. Microimaging confirmed the presence of a tibia fracture and pulmonary contusion. CONCLUSIONS The novel mouse multiple trauma model established in this study is a common trauma model that shows similar pathological mechanisms and imaging characteristics in patients with multiple injuries. This study is useful for determining whether blockade or intervention of the cytokine response is beneficial for the treatment of patients with multiple trauma. Further research is needed in the future.
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Affiliation(s)
- Bing Zhang
- Department of Emergency Intensive Care Medicine, Affiliated Hospital of Yangzhou University, Yangzhou, China
| | - Tingting Fu
- Department of Special Care Medicine, Affiliated Hospital of Yangzhou University, Yangzhou, China
| | - Yi Han
- Department of Clinical Medicine, Medical College of Yangzhou University, Yangzhou, China
| | - Gongke Li
- Department of Emergency Intensive Care Medicine, Affiliated Hospital of Yangzhou University, Yangzhou, China
| | - Xianyao Wan
- Department of Critical Care Medicine, Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Yong Li
- Department of Intensive Care Medicine, Affiliated Hospital of Yangzhou University, Yangzhou, China
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Kelly LS, Munley JA, Pons EE, Coldwell PS, Kannan KB, Efron PA, Mohr AM. Multicompartmental trauma alters bone marrow erythroblastic islands. J Trauma Acute Care Surg 2023; 94:197-204. [PMID: 36652391 PMCID: PMC9877140 DOI: 10.1097/ta.0000000000003821] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
BACKGROUND Trauma is associated with widespread inflammation, neuroendocrine activation, and an inadequate bone marrow response to anemia. During late-stage erythropoiesis, erythroid progenitors/erythroblasts form clusters on the surface of specialized bone marrow macrophages where they are supported through terminal differentiation and enucleation. We hypothesized that these erythroblastic islands (EBIs) are adversely impacted by severe trauma. METHODS Male Sprague-Dawley rats (n = 8/group) were subjected to either multiple injuries (PT) (lung contusion, hemorrhagic shock, cecectomy, and bifemoral pseudofractures), PT plus 2 hours of daily chronic restraint stress (PT/CS), or naive controls. Bone marrow was harvested on days 2 and 7. Nuclear-stained, enriched bone marrow EBIs were fixed and stained for CD71, VCAM-1, and CD163, and confocal images were obtained at 20 times magnification. Numbers of erythroid cells/EBI and ratio of reticulocytes/EBI were counted by a blinded observer. Differences were compared using analysis of variance, with significance defined as p < 0.05. RESULTS PT and PT/CS had significantly reduced numbers of erythroid cells per EBI on day 2 when compared with naive (PT: 5.9 ± 1.0 cells [ p < 0.05], PT/CS: 6.8 ± 0.8 cells [ p < 0.05] vs. naive: 8.5 ± 0.8 cells). On day 7, the number of erythroid cells/EBI increased following PT (8.3 ± 0.4 cells) but remained reduced following PT/CS (5.9 ± 0.5 cells [ p < 0.05]). This correlated with an increased proportion of reticulocytes/EBI on day 7 following PT, which was not present following PT/CS (PT: 54% [ p < 0.05] vs. PT/CS: 28%). CONCLUSION Late-stage erythropoiesis was altered following multicompartmental PT early after injury, and these alterations persisted with the addition of daily chronic stress. Alterations in EBI structure and function after severe trauma and critical illness may serve as a promising new area of study to improve mechanistic understanding of persistent anemia after trauma.
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Affiliation(s)
- Lauren S Kelly
- From the Department of Surgery, Sepsis and Critical Illness Research Center, University of Florida College of Medicine, Gainesville, Florida
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Yu J, Xu C, Wen Z, Wang G, Gil Silva AA, Brown MJ, Sanchez PG, Wang X. Shock lung is not "wet" but characterized as necroptotic inflammation in a mouse model of hypotension. J Thorac Cardiovasc Surg 2023; 165:e40-e53. [PMID: 35850733 DOI: 10.1016/j.jtcvs.2022.06.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 04/21/2022] [Accepted: 06/17/2022] [Indexed: 01/18/2023]
Abstract
OBJECTIVES Hypotension episodes before or after donor brain death are assumed to trigger hypoxia-reoxygenation, causing diffuse alveolar-capillary damage via necrosis. However, alveolar-capillary membranes have direct access to oxygen in alveoli. We hypothesized hypotension-induced lung injury is not diffuse alveolar-capillary damage but interstitial inflammation resulting from nonhypoxic lung ischemia and systemic responses to hypoxic extrapulmonary ischemia. METHODS The 4-hour hypotension model was established by subjecting C57BL/6J mice to 4-hour hypotension at 15 ± 5 mm Hg of mean artery pressure and resuscitated with whole shed blood and norepinephrine. Nonhypoxic lung ischemia model was established by 4-hour left pulmonary artery ligation. At 24 hours postprocedure, an arterial blood gas analysis and a gastroduodenal occult blood test were conducted. Lung samples were assessed for histology, cytokine transcripts, regulated cell death, and alveolar-capillary permeability. RESULTS The 4-hour hypotension model had an intraoperative mortality rate of 17.7% (41/231) and a stress-ulcer bleeding rate of 15.3% (29/190). No signs of alveolar flooding were observed in both models. Four-hour hypotension without stress ulcer showed normal oxygenation and permeability but increased interstitial infiltration, transcription of Tnf and Il1b, phosphorylation of MLKL and RIPK3, and cleaved caspase 3 compared with 4-hour pulmonary artery ligation and naïve control. Animals that developed stress ulcer presented with worse pulmonary infiltration, intracellular edema, and oxygenation but just slightly increased permeability. Immunoblotting showed significant upregulations of protein expression and phosphorylation of MLKL and RIPK3, cleaved Caspase-3, but not its prototype in 4-hour hypotension with stress ulcer. CONCLUSIONS Hypotensive lung injury is essentially a nonhypoxic ischemia-reperfusion injury enhanced by systemic responses. It is predominated by necroptosis-induced inflammation rather than necrosis-induced diffuse alveolar-capillary damage.
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Affiliation(s)
- Junyi Yu
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Pittsburgh, Pittsburgh, Pa; Acute Lung Injury Center of Excellence, University of Pittsburgh, Pittsburgh, Pa; Department of Breast Neoplastic Surgery (25th Ward), Hunan Tumor Hospital, The Affiliated Tumor Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan, China
| | - Che Xu
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Pittsburgh, Pittsburgh, Pa; Acute Lung Injury Center of Excellence, University of Pittsburgh, Pittsburgh, Pa; Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Zongmei Wen
- Department of Anesthesia, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Guifang Wang
- Department of Respiratory Medicine, Huashan Hospital, Fudan University School of Medicine, Shanghai, China
| | - Agustin Alejandro Gil Silva
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Pittsburgh, Pittsburgh, Pa
| | - Mark J Brown
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Pittsburgh, Pittsburgh, Pa
| | - Pablo G Sanchez
- Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa
| | - Xingan Wang
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Pittsburgh, Pittsburgh, Pa; Acute Lung Injury Center of Excellence, University of Pittsburgh, Pittsburgh, Pa; Thomas E. Starzl Transplantation Institute, University of Pittsburgh School of Medicine, Pittsburgh, Pa.
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Shah AM, Zamora R, Korff S, Barclay D, Yin J, El-Dehaibi F, Billiar TR, Vodovotz Y. Inferring Tissue-Specific, TLR4-Dependent Type 17 Immune Interactions in Experimental Trauma/Hemorrhagic Shock and Resuscitation Using Computational Modeling. Front Immunol 2022; 13:908618. [PMID: 35663944 PMCID: PMC9160183 DOI: 10.3389/fimmu.2022.908618] [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: 03/30/2022] [Accepted: 04/21/2022] [Indexed: 11/13/2022] Open
Abstract
Trauma/hemorrhagic shock followed by resuscitation (T/HS-R) results in multi-system inflammation and organ dysfunction, in part driven by binding of damage-associated molecular pattern molecules to Toll-like Receptor 4 (TLR4). We carried out experimental T/HS-R (pseudo-fracture plus 2 h of shock followed by 0-22 h of resuscitation) in C57BL/6 (wild type [WT]) and TLR4-null (TLR4-/-) mice, and then defined the dynamics of 20 protein-level inflammatory mediators in the heart, gut, lung, liver, spleen, kidney, and systemic circulation. Cross-correlation and Principal Component Analysis (PCA) on data from the 7 tissues sampled suggested that TLR4-/- samples express multiple inflammatory mediators in a small subset of tissue compartments as compared to the WT samples, in which many inflammatory mediators were localized non-specifically to nearly all compartments. We and others have previously defined a central role for type 17 immune cells in human trauma. Accordingly, correlations between IL-17A and GM-CSF (indicative of pathogenic Th17 cells); between IL-17A and IL-10 (indicative of non-pathogenic Th17 cells); and IL-17A and TNF (indicative of memory/effector T cells) were assessed across all tissues studied. In both WT and TLR4-/- mice, positive correlations were observed between IL-17A and GM-CSF, IL-10, and TNF in the kidney and gut. In contrast, the variable and dynamic presence of both pathogenic and non-pathogenic Th17 cells was inferred in the systemic circulation of TLR4-/- mice over time, suggesting a role for TLR4 in efflux of these cells into peripheral tissues. Hypergraph analysis - used to define dynamic, cross compartment networks - in concert with PCA-suggested that IL-17A was present persistently in all tissues at all sampled time points except for its absence in the plasma at 0.5h in the WT group, supporting the hypothesis that T/HS-R induces efflux of Th17 cells from the circulation and into specific tissues. These analyses suggest a complex, context-specific role for TLR4 and type 17 immunity following T/HS-R.
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Affiliation(s)
- Ashti M Shah
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, United States
| | - Ruben Zamora
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, United States.,Center for Inflammation and Regeneration Modeling, McGowan Institute for Regenerative Medicine, Pittsburgh, PA, United States
| | - Sebastian Korff
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, United States
| | - Derek Barclay
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, United States
| | - Jinling Yin
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, United States
| | - Fayten El-Dehaibi
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, United States
| | - Timothy R Billiar
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, United States
| | - Yoram Vodovotz
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, United States.,Center for Inflammation and Regeneration Modeling, McGowan Institute for Regenerative Medicine, Pittsburgh, PA, United States.,Center for Systems Immunology, University of Pittsburgh, Pittsburgh, PA, United States
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Wallen TE, Singer KE, Elson NC, Baucom MR, England LG, Schuster RM, Pritts TA, Goodman MD. Defining Endotheliopathy in Murine Polytrauma Models. Shock 2022; 57:291-298. [PMID: 35759308 DOI: 10.1097/shk.0000000000001940] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
INTRODUCTION "Endotheliopathy of trauma" is recognized as endothelial dysfunction following traumatic injury leading to poor patient outcomes. Acute post-traumatic disruptions in endothelial cell function have been associated with profound physiologic, hemodynamic, and coagulation derangements. The goal of this study was to define the generation and extent of endotheliopathy in murine polytrauma models by evaluating the post-traumatic release of serum biomarkers of ongoing cellular injury. METHODS Mice were randomized to undergo moderately severe concussive TBI by weight drop, 60-min hemorrhagic shock to MAP 25 mmHg with subsequent resuscitation with Lactated Ringer's, submandibular bleed (SMB), and/or midline laparotomy with rectus muscle crush. Mice were sacrificed at 1, 4, or 24 h for serum biomarker evaluation. RESULTS Serum biomarkers revealed differential timing of elevation and injury-dependent release.At 24 h, soluble thrombomodulin was significantly elevated in combined TBI + shock + lap crush compared to untouched, and shock alone. Syndecan-1 levels were significantly elevated after shock 1 to 24 h compared to untouched cohorts with a significant elevation in TBI + shock + lap crush 24 h after injury compared to shock alone. UCHL-1 was significantly elevated in shock mice at 1 to 24 h post-injury compared to untouched mice. UCHL-1 was also significantly elevated in the TBI + shock cohort 24 h after injury compared to shock alone. Hyaluronic acid release at 4 h was significantly elevated in shock alone compared to the untouched cohort with further elevations in TBI + shock + lap crush and TBI + shock compared to shock alone at 24 h. Hyaluronic acid was also increased in lap crush and laparotomy only cohort compared to untouched mice 24 h after injury. CONCLUSIONS A murine model of polytrauma including TBI, hemorrhagic shock, and laparotomy abdominal crush is a reliable method for evaluation of endotheliopathy secondary to trauma as indicated by differential changes in serum biomarkers.
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Affiliation(s)
- Taylor E Wallen
- Department of Surgery, University of Cincinnati, Cincinnati, Ohio
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Gihring A, Gärtner F, Schirmer M, Wabitsch M, Knippschild U. Recent Developments in Mouse Trauma Research Models: A Mini-Review. Front Physiol 2022; 13:866617. [PMID: 35574493 PMCID: PMC9101050 DOI: 10.3389/fphys.2022.866617] [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: 01/31/2022] [Accepted: 04/04/2022] [Indexed: 12/02/2022] Open
Abstract
The urgency to investigate trauma in a controlled and reproducible environment rises since multiple trauma still account for the most deaths for people under the age of 45. The most common multiple trauma include head as well as blunt thorax trauma along with fractures. However, these trauma remain difficult to treat, partially because the molecular mechanisms that trigger the immediate immune response are not fully elucidated. To illuminate these mechanisms, investigators have used animal models, primarily mice as research subjects. This mini review aims to 1) emphasize the importance of the development of clinically relevant murine trauma research, 2) highlight and discuss the existing conflict between simulating clinically relevant situations and elucidating molecular mechanisms, 3) describe the advantages and disadvantages of established mouse trauma models developed to simulate clinically relevant situations, 4) summarize and list established mouse models in the field of trauma research developed to simulate clinically relevant situations.
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Affiliation(s)
- Adrian Gihring
- Department of General and Visceral Surgery, Surgery Center, Ulm University Medical Center, Ulm, Germany
| | - Fabian Gärtner
- Department of General and Visceral Surgery, Surgery Center, Ulm University Medical Center, Ulm, Germany
| | - Melanie Schirmer
- Division of Pediatric Endocrinology and Diabetes, Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany
| | - Martin Wabitsch
- Division of Pediatric Endocrinology and Diabetes, Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany
| | - Uwe Knippschild
- Department of General and Visceral Surgery, Surgery Center, Ulm University Medical Center, Ulm, Germany
- *Correspondence: Uwe Knippschild,
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Relja B, Yang B, Bundkirchen K, Xu B, Köhler K, Neunaber C. Different experimental multiple trauma models induce comparable inflammation and organ injury. Sci Rep 2020; 10:20185. [PMID: 33214576 PMCID: PMC7678855 DOI: 10.1038/s41598-020-76499-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 10/05/2020] [Indexed: 01/04/2023] Open
Abstract
Multiple injuries appear to be a decisive factor for experimental polytrauma. Therefore, our aim was to compare the inflammatory response and organ damage of five different monotrauma with three multiple trauma models. For this, mice were randomly assigned to 10 groups: Healthy control (Ctrl), Sham, hemorrhagic shock (HS), thoracic trauma (TxT), osteotomy with external fixation (Fx), bilateral soft tissue trauma (bsTT) or laparotomy (Lap); polytrauma I (PT I, TxT + HS + Fx), PT II (TxT + HS + Fx + Lap) and one multi-trauma group (MT, TxT + HS + bsTT + Lap). The inflammatory response and organ damage were quantified at 6 h by analyses of IL-6, IL-1β, IL-10, CXCL1, SAA1, HMGB1 and organ injury. Systemic IL-6 increased in all mono and multiple trauma groups, while CXCL1 increased only in HS, PT I, PT II and MT vs. control. Local inflammatory response was most prominent in HS, PT I, PT II and MT in the liver. Infiltration of inflammatory cells into lung and liver was significant in all multiple trauma groups vs. controls. Hepatic and pulmonary injury was prominent in HS, PT I, PT II and MT groups. These experimental multiple trauma models closely mimic the early post-traumatic inflammatory response in human. Though, the choice of read-out parameters is very important for therapeutic immune modulatory approaches.
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Affiliation(s)
- Borna Relja
- Department of Radiology and Nuclear Medicine, Experimental Radiology, Otto-von-Guericke University, Magdeburg, Germany
| | - Bing Yang
- Trauma Department, Hannover Medical School, Hannover, Germany
| | | | - Baolin Xu
- Department of Radiology and Nuclear Medicine, Experimental Radiology, Otto-von-Guericke University, Magdeburg, Germany.,Trauma Department, Hannover Medical School, Hannover, Germany.,Department of Trauma, Hand and Reconstructive Surgery, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Kernt Köhler
- Institute of Veterinary Pathology, Justus Liebig University, Giessen, Germany
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Comparison of post-traumatic changes in circulating and bone marrow leukocytes between BALB/c and CD-1 mouse strains. PLoS One 2019; 14:e0222594. [PMID: 31527918 PMCID: PMC6748677 DOI: 10.1371/journal.pone.0222594] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 09/03/2019] [Indexed: 11/19/2022] Open
Abstract
This manuscript emerged from a larger third-party funded project investigating a new poly-trauma model and its influence upon secondary sepsis. The present sub-study compared selected leukocyte subpopulations in the circulation and bone marrow after polytrauma in BALB/c versus CD-1 mice. Animals underwent unilateral femur fracture, splenectomy and hemorrhagic shock. We collected blood and bone marrow for flow cytometry analysis at 24h and 48h post-trauma. Circulating granulocytes (Ly6G+CD11+) increased in both strains after trauma. Only in BALB/c mice circulating CD8+ T-lymphocytes decreased within 48h by 30%. Regulatory T-cells (Tregs, CD4+CD25+CD127low) increased in both strains by approx. 32%. Circulating Tregs and lymphocytes (CD11b-Ly6G-MHC-2+) were always at least 1.5-fold higher in BALB/c, while the bone marrow MHC-2 expression decreased in CD-1 mice (p<0.05). Overall, immune responses to polytrauma were similar in both strains. Additionally, BALB/c expressed higher level of circulating regulatory T-cells and MHC-2-positive lymphocytes compared to CD-1 mice.
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Mayer AR, Dodd AB, Vermillion MS, Stephenson DD, Chaudry IH, Bragin DE, Gigliotti AP, Dodd RJ, Wasserott BC, Shukla P, Kinsler R, Alonzo SM. A systematic review of large animal models of combined traumatic brain injury and hemorrhagic shock. Neurosci Biobehav Rev 2019; 104:160-177. [PMID: 31255665 PMCID: PMC7307133 DOI: 10.1016/j.neubiorev.2019.06.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 06/17/2019] [Accepted: 06/19/2019] [Indexed: 01/08/2023]
Abstract
Traumatic brain injury (TBI) and severe blood loss (SBL) frequently co-occur in human trauma, resulting in high levels of mortality and morbidity. Importantly, each of the individual post-injury cascades is characterized by complex and potentially opposing pathophysiological responses, complicating optimal resuscitation and therapeutic approaches. Large animal models of poly-neurotrauma closely mimic human physiology, but a systematic literature review of published models has been lacking. The current review suggests a relative paucity of large animal poly-neurotrauma studies (N = 52), with meta-statistics revealing trends for animal species (exclusively swine), characteristics (use of single biological sex, use of juveniles) and TBI models. Although most studies have targeted blood loss volumes of 35-45%, the associated mortality rates are much lower relative to Class III/IV human trauma. This discrepancy may result from potentially mitigating experimental factors (e.g., mechanical ventilation prior to or during injury, pausing/resuming blood loss based on physiological parameters, administration of small volume fluid resuscitation) that are rarely associated with human trauma, highlighting the need for additional work in this area.
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Affiliation(s)
- Andrew R Mayer
- The Mind Research Network/Lovelace Biomedical and Environmental Research Institute, Pete & Nancy Domenici Hall, 1011 Yale Blvd. NE, Albuquerque, NM 87106, United States; Neurology Department, University of New Mexico School of Medicine, Albuquerque, NM 87131, United States; Psychiatry Department, University of New Mexico School of Medicine, Albuquerque, NM 87131, United States; Psychology Department, University of New Mexico, Albuquerque, NM 87131, United States.
| | - Andrew B Dodd
- The Mind Research Network/Lovelace Biomedical and Environmental Research Institute, Pete & Nancy Domenici Hall, 1011 Yale Blvd. NE, Albuquerque, NM 87106, United States
| | - Meghan S Vermillion
- The Mind Research Network/Lovelace Biomedical and Environmental Research Institute, Pete & Nancy Domenici Hall, 1011 Yale Blvd. NE, Albuquerque, NM 87106, United States
| | - David D Stephenson
- The Mind Research Network/Lovelace Biomedical and Environmental Research Institute, Pete & Nancy Domenici Hall, 1011 Yale Blvd. NE, Albuquerque, NM 87106, United States
| | - Irshad H Chaudry
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL 35294-0019, United States
| | - Denis E Bragin
- Department of Neurosurgery, University of New Mexico School of Medicine, Albuquerque, NM 87131, United States
| | - Andrew P Gigliotti
- The Mind Research Network/Lovelace Biomedical and Environmental Research Institute, Pete & Nancy Domenici Hall, 1011 Yale Blvd. NE, Albuquerque, NM 87106, United States
| | - Rebecca J Dodd
- The Mind Research Network/Lovelace Biomedical and Environmental Research Institute, Pete & Nancy Domenici Hall, 1011 Yale Blvd. NE, Albuquerque, NM 87106, United States
| | - Benjamin C Wasserott
- The Mind Research Network/Lovelace Biomedical and Environmental Research Institute, Pete & Nancy Domenici Hall, 1011 Yale Blvd. NE, Albuquerque, NM 87106, United States
| | - Priyank Shukla
- The Mind Research Network/Lovelace Biomedical and Environmental Research Institute, Pete & Nancy Domenici Hall, 1011 Yale Blvd. NE, Albuquerque, NM 87106, United States
| | - Rachel Kinsler
- Department of the Army Civilian, U.S. Army Aeromedical Research Laboratory, Fort Rucker, AL 36362-0577, United States
| | - Sheila M Alonzo
- The Mind Research Network/Lovelace Biomedical and Environmental Research Institute, Pete & Nancy Domenici Hall, 1011 Yale Blvd. NE, Albuquerque, NM 87106, United States
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Traumatic injury pattern is of equal relevance as injury severity for experimental (poly)trauma modeling. Sci Rep 2019; 9:5706. [PMID: 30952899 PMCID: PMC6450898 DOI: 10.1038/s41598-019-42085-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 03/21/2019] [Indexed: 01/02/2023] Open
Abstract
This study aims to elaborate the relevance of trauma severity and traumatic injury pattern in different multiple and/or polytrauma models by comparing five singular trauma to two different polytrauma (PT) models with high and one multiple trauma (MT) model with low injury-severity score (ISS). The aim is to provide a baseline for reducing animal harm according to 3Rs by providing less injury as possible in polytrauma modeling. Mice were randomly assigned to 10 groups: controls (Ctrl; n = 15), Sham (n = 15); monotrauma groups: hemorrhagic shock (HS; n = 15), thoracic trauma (TxT; n = 18), osteotomy with external fixation (Fx; n = 16), bilateral soft tissue trauma (bSTT; n = 16) or laparotomy (Lap; n = 16); two PT groups: PT I (TxT + HS + Fx; ISS = 18; n = 18), PT II (TxT + HS + Fx + Lap; ISS = 22; n = 18), and a MT group (TxT + HS + bSTT + Lap, ISS = 13; n = 18). Activity and mortality were assessed. Blood gas analyses and organ damage markers were determined after 6 h. Significant mortality occurred in TxT, PT and MT (11.7%). Activity decreased significantly in TxT, HS, both polytrauma and MT vs. Ctrl/Sham. PT-groups and MT had significantly decreased activity vs. bsTT, Lap or Fx. MT had significantly lower pCO2vs. Ctrl/Sham, Lap or bsTT. Transaminases increased significantly in PT-groups and MT vs. Ctrl, Sham or monotrauma. Traumatic injury pattern is of comparable relevance as injury severity for experimental multiple or (poly)trauma modeling.
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13
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Schosserer M, Banks G, Dogan S, Dungel P, Fernandes A, Marolt Presen D, Matheu A, Osuchowski M, Potter P, Sanfeliu C, Tuna BG, Varela-Nieto I, Bellantuono I. Modelling physical resilience in ageing mice. Mech Ageing Dev 2018; 177:91-102. [PMID: 30290161 PMCID: PMC6445352 DOI: 10.1016/j.mad.2018.10.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Revised: 09/12/2018] [Accepted: 10/01/2018] [Indexed: 02/06/2023]
Abstract
Geroprotectors, a class of drugs targeting multiple deficits occurring with age, necessitate the development of new animal models to test their efficacy. The COST Action MouseAGE is a European network whose aim is to reach consensus on the translational path required for geroprotectors, interventions targeting the biology of ageing. In our previous work we identified frailty and loss of resilience as a potential target for geroprotectors. Frailty is the result of an accumulation of deficits, which occurs with age and reduces the ability to respond to adverse events (physical resilience). Modelling frailty and physical resilience in mice is challenging for many reasons. There is no consensus on the precise definition of frailty and resilience in patients or on how best to measure it. This makes it difficult to evaluate available mouse models. In addition, the characterization of those models is poor. Here we review potential models of physical resilience, focusing on those where there is some evidence that the administration of acute stressors requires integrative responses involving multiple tissues and where aged mice showed a delayed recovery or a worse outcome then young mice in response to the stressor. These models include sepsis, trauma, drug- and radiation exposure, kidney and brain ischemia, exposure to noise, heat and cold shock.
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Affiliation(s)
- Markus Schosserer
- University of Natural Resources and Life Sciences, Vienna, Department of Biotechnology, Vienna, Austria
| | - Gareth Banks
- Mammalian Genetics Unit, MRC Harwell Institute, Harwell Campus, Oxfordshire, OX11 0RD, United Kingdom
| | - Soner Dogan
- Department of Medical Biology, School of Medicine, Yeditepe University, Istanbul, Turkey
| | - Peter Dungel
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, AUVA Research Center, Vienna, Austria
| | - Adelaide Fernandes
- Neuron-Glia Biology in Health and Disease, iMed.ULisboa, Research Institute for Medicines, Department of Biochemistry and Human Biology, Faculty of Pharmacy, Universidade de Lisboa, Lisboa, Portugal
| | - Darja Marolt Presen
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, AUVA Research Center, Vienna, Austria
| | - Ander Matheu
- Oncology Department, Biodonostia Research Institute, San Sebastián, Spain
| | - Marcin Osuchowski
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, AUVA Research Center, Vienna, Austria
| | - Paul Potter
- Mammalian Genetics Unit, MRC Harwell Institute, Harwell Campus, Oxfordshire, OX11 0RD, United Kingdom
| | - Coral Sanfeliu
- Institute of Biomedical Research of Barcelona (IIBB) CSIC, IDIBAPS, CIBERESP, Barcelona, Spain
| | - Bilge Guvenc Tuna
- Department of Medical Biophysics, School of Medicine, Yeditepe University, Istanbul, Turkey
| | | | - Ilaria Bellantuono
- MRC/Arthritis Research-UK Centre for Integrated Research into Musculoskeletal Ageing (CIMA), Department of Oncology and Metabolism, The Medical School, Beech Hill Road, Sheffield, S10 2RX, United Kingdom.
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