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Piibor J, Waldmann A, Prasadani M, Kavak A, Andronowska A, Klein C, Kodithuwakku S, Fazeli A. Investigation of Uterine Fluid Extracellular Vesicles' Proteomic Profiles Provides Novel Diagnostic Biomarkers of Bovine Endometritis. Biomolecules 2024; 14:626. [PMID: 38927030 PMCID: PMC11202259 DOI: 10.3390/biom14060626] [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: 04/24/2024] [Revised: 05/22/2024] [Accepted: 05/23/2024] [Indexed: 06/28/2024] Open
Abstract
Cow uterine infections pose a challenge in dairy farming, resulting in reproductive disorders. Uterine fluid extracellular vesicles (UF-EVs) play a key role in cell-to-cell communication in the uterus, potentially holding the signs of aetiology for endometritis. We used mass spectrometry-based quantitative shotgun proteomics to compare UF-EV proteomic profiles in healthy cows (H), cows with subclinical (SE) or clinical endometritis (CLE) sampled at 28-35 days postpartum. Functional analysis was performed on embryo cultures with the exposure to different EV types. A total of 248 UF-EV proteins exhibited differential enrichment between the groups. Interestingly, in SE, EV protein signature suggests a slight suppression of inflammatory response compared to CLE-UF-EVs, clustering closer with healthy cows' profile. Furthermore, CLE-UF-EVs proteomic profile highlighted pathways associated with cell apoptosis and active inflammation aimed at pathogen elimination. In SE-UF-EVs, the regulation of normal physiological status was aberrant, showing cell damage and endometrial repair at the same time. Serine peptidase HtrA1 (HTRA1) emerged as a potential biomarker for SE. Supplementation of CLE- and SE-derived UF-EVs reduced the embryo developmental rates and quality. Therefore, further research is warranted to elucidate the precise aetiology of SE in cattle, and HTRA1 should be further explored as a potential diagnostic biomarker.
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Affiliation(s)
- Johanna Piibor
- Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Kreutzwaldi 62, 51006 Tartu, Estonia; (J.P.); (A.W.); (M.P.); (A.K.); (S.K.)
| | - Andres Waldmann
- Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Kreutzwaldi 62, 51006 Tartu, Estonia; (J.P.); (A.W.); (M.P.); (A.K.); (S.K.)
- Faculty of Veterinary Medicine, Latvia University of Life Sciences and Technologies, LV-3004 Jelgava, Latvia
| | - Madhusha Prasadani
- Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Kreutzwaldi 62, 51006 Tartu, Estonia; (J.P.); (A.W.); (M.P.); (A.K.); (S.K.)
| | - Ants Kavak
- Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Kreutzwaldi 62, 51006 Tartu, Estonia; (J.P.); (A.W.); (M.P.); (A.K.); (S.K.)
| | - Aneta Andronowska
- Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Juliana Tuwima 10, 10-748 Olsztyn, Poland;
| | - Claudia Klein
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Höltystr. 10, 31535 Neustadt, Germany;
| | - Suranga Kodithuwakku
- Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Kreutzwaldi 62, 51006 Tartu, Estonia; (J.P.); (A.W.); (M.P.); (A.K.); (S.K.)
- Department of Animal Sciences, Faculty of Agriculture, University of Peradeniya, Peradeniya 20400, Sri Lanka
| | - Alireza Fazeli
- Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Kreutzwaldi 62, 51006 Tartu, Estonia; (J.P.); (A.W.); (M.P.); (A.K.); (S.K.)
- Department of Pathophysiology, Institute of Biomedicine and Translational Medicine, University of Tartu, Ravila St. 14b, 50411 Tartu, Estonia
- Division of Clinical Medicine, School of Medicine & Population Health, University of Sheffield, Level 4, Jessop Wing, Tree Root Walk, Sheffield S10 2SF, UK
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Seim RF, Herring LE, Mordant AL, Willis ML, Wallet SM, Coleman LG, Maile R. Involvement of extracellular vesicles in the progression, diagnosis, treatment, and prevention of whole-body ionizing radiation-induced immune dysfunction. Front Immunol 2023; 14:1188830. [PMID: 37404812 PMCID: PMC10316130 DOI: 10.3389/fimmu.2023.1188830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 05/23/2023] [Indexed: 07/06/2023] Open
Abstract
Acute radiation syndrome (ARS) develops after exposure to high doses of ionizing radiation and features immune suppression and organ failure. Currently, there are no diagnostics to identify the occurrence or severity of exposure and there are limited treatments and preventative strategies to mitigate ARS. Extracellular vesicles (EVs) are mediators of intercellular communication that contribute to immune dysfunction across many diseases. We investigated if EV cargo can identify whole body irradiation (WBIR) exposure and if EVs promote ARS immune dysfunction. We hypothesized that beneficial EVs derived from mesenchymal stem cells (MSC-EVs) would blunt ARS immune dysfunction and might serve as prophylactic radioprotectants. Mice received WBIR (2 or 9 Gy) with assessment of EVs at 3 and 7 days after exposure. LC-MS/MS proteomic analysis of WBIR-EVs found dose-related changes as well as candidate proteins that were increased with both doses and timepoints (34 total) such as Thromboxane-A Synthase and lymphocyte cytosolic protein 2. Suprabasin and Sarcalumenin were increased only after 9 Gy suggesting these proteins may indicate high dose/lethal exposure. Analysis of EV miRNAs identified miR-376 and miR-136, which were increased up to 200- and 60-fold respectively by both doses of WBIR and select miRNAs such as miR-1839 and miR-664 were increased only with 9 Gy. WBIR-EVs (9 Gy) were biologically active and blunted immune responses to LPS in RAW264.7 macrophages, inhibiting canonical signaling pathways associated with wound healing and phagosome formation. When given 3 days after exposure, MSC-EVs slightly modified immune gene expression changes in the spleens of mice in response to WBIR and in a combined radiation plus burn injury exposure (RCI). MSC-EVs normalized the expression of certain key immune genes such as NFκBia and Cxcr4 (WBIR), Map4k1, Ccr9 and Cxcl12 (RCI) and lowered plasma TNFα cytokine levels after RCI. When given prophylactically (24 and 3 hours before exposure), MSC-EVs prolonged survival to the 9 Gy lethal exposure. Thus, EVs are important participants in ARS. EV cargo might be used to diagnose WBIR exposure, and MSC-EVs might serve as radioprotectants to blunt the impact of toxic radiation exposure.
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Affiliation(s)
- Roland F. Seim
- Curriculum in Toxicology & Environmental Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Laura E. Herring
- Department of Pharmacology, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, United States
| | - Angie L. Mordant
- Department of Pharmacology, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, United States
| | - Micah L. Willis
- Curriculum in Toxicology & Environmental Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
- Department of Oral Biology, University of Florida, Gainesville, FL, United States
| | - Shannon M. Wallet
- Department of Oral Biology, University of Florida, Gainesville, FL, United States
| | - Leon G. Coleman
- Curriculum in Toxicology & Environmental Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
- Department of Pharmacology, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, United States
| | - Robert Maile
- Department of Surgery, University of Florida, Gainesville, FL, United States
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Seim RF, Willis ML, Wallet SM, Maile R, Coleman LG. EXTRACELLULAR VESICLES AS REGULATORS OF IMMUNE FUNCTION IN TRAUMATIC INJURIES AND SEPSIS. Shock 2023; 59:180-189. [PMID: 36516458 PMCID: PMC9940835 DOI: 10.1097/shk.0000000000002023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/20/2022] [Accepted: 10/20/2022] [Indexed: 12/15/2022]
Abstract
ABSTRACT Despite advancements in critical care and resuscitation, traumatic injuries are one of the leading causes of death around the world and can bring about long-term disabilities in survivors. One of the primary causes of death for trauma patients are secondary phase complications that can develop weeks or months after the initial insult. These secondary complications typically occur because of systemic immune dysfunction that develops in response to injury, which can lead to immunosuppression, coagulopathy, multiple organ failure, unregulated inflammation, and potentially sepsis in patients. Recently, extracellular vesicles (EVs) have been identified as mediators of these processes because their levels are increased in circulation after traumatic injury and they encapsulate cargo that can aggravate these secondary complications. In this review, we will discuss the role of EVs in the posttrauma pathologies that arise after burn injuries, trauma to the central nervous system, and infection. In addition, we will examine the use of EVs as biomarkers for predicting late-stage trauma outcomes and as therapeutics for reversing the pathological processes that develop after trauma. Overall, EVs have emerged as critical mediators of trauma-associated pathology and their use as a therapeutic agent represents an exciting new field of biomedicine.
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Affiliation(s)
- Roland F. Seim
- Curriculum in Toxicology and Environmental Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
- Department of Surgery, North Carolina Jaycee Burn Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Micah L. Willis
- Curriculum in Toxicology and Environmental Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
- Department of Surgery, North Carolina Jaycee Burn Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Shannon M. Wallet
- Department of Oral Biology, College of Dentistry, University of Florida, Gainesville, Florida
| | - Robert Maile
- Department of Surgery, University of Florida, Gainesville, Florida
| | - Leon G. Coleman
- Department of Pharmacology, University of North Carolina at Chapel Hill, School of Medicine, Chapel Hill, North Carolina
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Tan YY, O'Dea KP, Tsiridou DM, Pac Soo A, Koh MW, Beckett F, Takata M. Circulating Myeloid Cell-derived Extracellular Vesicles as Mediators of Indirect Acute Lung Injury. Am J Respir Cell Mol Biol 2023; 68:140-149. [PMID: 36150169 DOI: 10.1165/rcmb.2022-0207oc] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Blood-borne myeloid cells, neutrophils and monocytes, play a central role in the development of indirect acute lung injury (ALI) during sepsis and noninfectious systemic inflammatory response syndrome. By contrast, the contribution of circulating myeloid cell-derived extracellular vesicles (EVs) to ALI is unknown, despite acute increases in their numbers during sepsis and systemic inflammatory response syndrome. Here, we investigated the direct role of circulating myeloid-EVs in ALI using a mouse isolated perfused lung system and a human cell coculture model of pulmonary vascular inflammation consisting of lung microvascular endothelial cells and peripheral blood mononuclear cells. Total and immunoaffinity-isolated myeloid (CD11b+) and platelet (CD41+) EVs were prepared from the plasma of intravenous LPS-injected endotoxemic donor mice and transferred directly into recipient lungs. Two-hour perfusion of lungs with unfractionated EVs from a single donor induced pulmonary edema formation and increased perfusate concentrations of RAGE (receptor for advanced glycation end products), consistent with lung injury. These responses were abolished in the lungs of monocyte-depleted mice. The isolated myeloid- but not platelet-EVs produced a similar injury response and the acute intravascular release of proinflammatory cytokines and endothelial injury markers. In the in vitro human coculture model, human myeloid- (CD11b+) but not platelet- (CD61+) EVs isolated from LPS-stimulated whole blood induced acute proinflammatory cytokine production and endothelial activation. These findings implicate circulating myeloid-EVs as acute mediators of pulmonary vascular inflammation and edema, suggesting an alternative therapeutic target for attenuation of indirect ALI.
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Affiliation(s)
- Ying Ying Tan
- Division of Anaesthetics, Pain Medicine, and Intensive Care, Imperial College London, Chelsea and Westminster Hospital, London, United Kingdom
| | - Kieran P O'Dea
- Division of Anaesthetics, Pain Medicine, and Intensive Care, Imperial College London, Chelsea and Westminster Hospital, London, United Kingdom
| | - Diianeira Maria Tsiridou
- Division of Anaesthetics, Pain Medicine, and Intensive Care, Imperial College London, Chelsea and Westminster Hospital, London, United Kingdom
| | - Aurelie Pac Soo
- Division of Anaesthetics, Pain Medicine, and Intensive Care, Imperial College London, Chelsea and Westminster Hospital, London, United Kingdom
| | - Marissa W Koh
- Division of Anaesthetics, Pain Medicine, and Intensive Care, Imperial College London, Chelsea and Westminster Hospital, London, United Kingdom
| | - Florence Beckett
- Division of Anaesthetics, Pain Medicine, and Intensive Care, Imperial College London, Chelsea and Westminster Hospital, London, United Kingdom
| | - Masao Takata
- Division of Anaesthetics, Pain Medicine, and Intensive Care, Imperial College London, Chelsea and Westminster Hospital, London, United Kingdom
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Weber B, Henrich D, Hildebrand F, Marzi I, Leppik L. THE ROLES OF EXTRACELLULAR VESICLES IN SEPSIS AND SYSTEMIC INFLAMMATORY RESPONSE SYNDROME. Shock 2023; 59:161-172. [PMID: 36730865 PMCID: PMC9940838 DOI: 10.1097/shk.0000000000002010] [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: 08/10/2022] [Revised: 08/29/2022] [Accepted: 10/05/2022] [Indexed: 02/04/2023]
Abstract
ABSTRACT Sepsis is a life-threatening organ dysfunction, caused by dysregulation of the host response to infection. To understand the underlying mechanisms of sepsis, the vast spectrum of extracellular vesicles (EVs) is gaining importance in this research field. A connection between EVs and sepsis was shown in 1998 in an endotoxemia pig model. Since then, the number of studies describing EVs as markers and mediators of sepsis increased steadily. Extracellular vesicles in sepsis could be friends and foes at the same time depending on their origin and cargo. On the one hand, transfer of EVs or outer membrane vesicles can induce sepsis or systemic inflammatory response syndrome with comparable efficiency as well-established methods, such as cecal ligation puncture or lipopolysaccharide injection. On the other hand, EVs could provide certain therapeutic effects, mediated via reduction of reactive oxygen species, inflammatory cytokines and chemokines, influence on macrophage polarization and apoptosis, as well as increase of anti-inflammatory cytokines. Moreover, EVs could be helpful in the diagnosis of sepsis. Extracellular vesicles of different cellular origin, such as leucocytes, macrophages, platelets, and granulocytes, have been suggested as potential sepsis biomarkers. They ensure the diagnosis of sepsis earlier than classical clinical inflammation markers, such as C-reactive protein, leucocytes, or IL-6. This review summarizes the three roles of EVs in sepsis-mediator/inducer, biomarker, and therapeutic tool.
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Affiliation(s)
- Birte Weber
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Frankfurt, Goethe-University, Frankfurt am Main, Germany
| | - Dirk Henrich
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Frankfurt, Goethe-University, Frankfurt am Main, Germany
| | - Frank Hildebrand
- Department of Trauma and Reconstructive Surgery, University Hospital RWTH Aachen. Aachen, Germany
| | - Ingo Marzi
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Frankfurt, Goethe-University, Frankfurt am Main, Germany
| | - Liudmila Leppik
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Frankfurt, Goethe-University, Frankfurt am Main, Germany
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Schiavello M, Vizio B, Bosco O, Pivetta E, Mariano F, Montrucchio G, Lupia E. Extracellular Vesicles: New Players in the Mechanisms of Sepsis- and COVID-19-Related Thromboinflammation. Int J Mol Sci 2023; 24:ijms24031920. [PMID: 36768242 PMCID: PMC9916541 DOI: 10.3390/ijms24031920] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 01/11/2023] [Accepted: 01/13/2023] [Indexed: 01/21/2023] Open
Abstract
Sepsis and COVID-19 patients often manifest an imbalance in inflammation and coagulation, a complex pathological mechanism also named thromboinflammation, which strongly affects patient prognosis. Extracellular vesicles (EVs) are nanoparticles released by cells into extracellular space that have a relevant role in cell-to-cell communication. Recently, EVs have been shown to act as important players in a variety of pathologies, including cancer and cardiovascular disease. The biological properties of EVs in the mechanisms of thromboinflammation during sepsis and COVID-19 are still only partially known. Herein, we summarize the current experimental evidence on the role of EVs in thromboinflammation, both in bacterial sepsis and in COVID-19. A better understanding of EV involvement in these processes could be useful in describing novel diagnostic and therapeutic applications of EVs in these diseases.
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Yang X, Chatterjee V, Zheng E, Reynolds A, Ma Y, Villalba N, Tran T, Jung M, Smith DJ, Wu MH, Yuan SY. Burn Injury-Induced Extracellular Vesicle Production and Characteristics. Shock 2022; 57:228-242. [PMID: 35613455 PMCID: PMC9246995 DOI: 10.1097/shk.0000000000001938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
ABSTRACT Extracellular vesicles (EVs) are nano-sized membrane-bound particles containing biologically active cargo molecules. The production and molecular composition of EVs reflect the physiological state of parent cells, and once released into the circulation, they exert pleiotropic functions via transferring cargo contents. Thus, circulating EVs not only serve as biomarkers, but also mediators in disease processes or injury responses. In the present study, we performed a comprehensive analysis of plasma EVs from burn patients and healthy subjects, characterizing their size distribution, concentration, temporal changes, cell origins, and cargo protein contents. Our results indicated that burn injury induced a significant increase in circulating EVs, the response peaked at the time of admission and declined over the course of recovery. Importantly, EV production correlated with injury severity, as indicated by the total body surface area and depth of burn, requirement for critical care/ICU stay, hospitalization length, wound infection, and concurrence of sepsis. Burn patients with inhalation injury showed a higher level of EVs than those without inhalation injury. We also evaluated patient demographics (age and sex) and pre-existing conditions (hypertension, obesity, and smoking) and found no significant correlation between these conditions and overall EV production. At the molecular level, flow cytometric analysis showed that the burn-induced EVs were largely derived from leukocytes and endothelial cells (ECs), which are known to be activated postburn. Additionally, a high level of zona-occludens-1 (ZO-1), a major constituent of tight junctions, was identified in burn EV cargos, indicative of injury in tissues that form barriers via tight junctions. Moreover, when applied to endothelial cell monolayers, burn EVs caused significant barrier dysfunction, characterized by decreased transcellular barrier resistance and disrupted cell-cell junction continuity. Taken together, these data suggest that burn injury promotes the production of EVs containing unique cargo proteins in a time-dependent manner; the response correlates with injury severity and worsened clinical outcomes. Functionally, burn EVs serve as a potent mediator capable of reducing endothelial barrier resistance and impairing junction integrity, a pathophysiological process underlying burn-associated tissue dysfunction. Thus, further in-depth characterization of circulating EVs will contribute to the development of new prognostic tools or therapeutic targets for advanced burn care.
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Affiliation(s)
- Xiaoyuan Yang
- Department of Molecular Pharmacology and Physiology, University of South Florida Morsani College of Medicine, Tampa, Florida, USA
| | - Victor Chatterjee
- Department of Molecular Pharmacology and Physiology, University of South Florida Morsani College of Medicine, Tampa, Florida, USA
| | - Ethan Zheng
- Department of Molecular Pharmacology and Physiology, University of South Florida Morsani College of Medicine, Tampa, Florida, USA
| | - Amanda Reynolds
- Department of Molecular Pharmacology and Physiology, University of South Florida Morsani College of Medicine, Tampa, Florida, USA
| | - Yonggang Ma
- Department of Molecular Pharmacology and Physiology, University of South Florida Morsani College of Medicine, Tampa, Florida, USA
| | - Nuria Villalba
- Department of Molecular Pharmacology and Physiology, University of South Florida Morsani College of Medicine, Tampa, Florida, USA
| | - Thanh Tran
- Department of Surgery, University of South Florida Morsani College of Medicine, Tampa, Florida, USA
| | - Michelle Jung
- Department of Surgery, University of South Florida Morsani College of Medicine, Tampa, Florida, USA
| | - David J. Smith
- Department of Plastic Surgery, University of South Florida Morsani College of Medicine, Tampa, Florida, USA
| | - Mack H. Wu
- Department of Surgery, University of South Florida Morsani College of Medicine, Tampa, Florida, USA
| | - Sarah Y. Yuan
- Department of Molecular Pharmacology and Physiology, University of South Florida Morsani College of Medicine, Tampa, Florida, USA
- Department of Surgery, University of South Florida Morsani College of Medicine, Tampa, Florida, USA
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Bonifay A, Robert S, Champagne B, Petit PR, Eugène A, Chareyre C, Duchez AC, Vélier M, Fritz S, Vallier L, Lacroix R, Dignat-George F. A new strategy to count and sort neutrophil-derived extracellular vesicles: Validation in infectious disorders. J Extracell Vesicles 2022; 11:e12204. [PMID: 35362257 PMCID: PMC8971553 DOI: 10.1002/jev2.12204] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 01/27/2022] [Accepted: 03/01/2022] [Indexed: 01/13/2023] Open
Abstract
Newly recognized polymorphonuclear neutrophil (PMNs) functions include the ability to release subcellular mediators such as neutrophil‐derived extracellular vesicles (NDEVs) involved in immune and thrombo‐inflammatory responses. Elevation of their plasmatic level has been reported in a variety of infectious and cardiovascular disorders, but the clinical use of this potential biomarker is hampered by methodological issues. Although flow cytometry (FCM) is currently used to detect NDEVs in the plasma of patients, an extensive characterization of NDEVs has never been done. Moreover, their detection remains challenging because of their small size and low antigen density. Therefore, the objective of the present study was first to establish a surface antigenic signature of NDEVs detectable by FCM and therefore to improve their detection in biological fluids by developing a strategy allowing to overcome their low fluorescent signal and reduce the background noise. By testing a large panel of 54 antibody specificities already reported to be positive on PMNs, we identified a profile of 15 membrane protein markers, including 4 (CD157, CD24, CD65 and CD66c) never described on NDEVs. Among them, CD15, CD66b and CD66c were identified as the most sensitive and specific markers to detect NDEVs by FCM. Using this antigenic signature, we developed a new strategy combining the three best antibodies in a cocktail and reducing the background noise by size exclusion chromatography (SEC). This strategy allowed a significant improvement in NDEVs enumeration in plasma from sepsis patients and made it feasible to efficiently sort NDEVs from COVID‐19 patients. Altogether, this work opens the door to a more valuable measurement of NDEVs as a potential biomarker in clinical practice. A similar strategy could also be applied to improve detection by FCM of other rare subpopulations of EVs generated by tissues with limited access, such as vascular endothelium, cancer cells or placenta.
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Affiliation(s)
- Amandine Bonifay
- Aix-Marseille University, C2VN, INSERM 1263, INRA 1260, Marseille, France.,Department of Hematology and Vascular Biology, CHU La Conception, APHM, Marseille, France
| | - Stéphane Robert
- Aix-Marseille University, C2VN, INSERM 1263, INRA 1260, Marseille, France
| | - Belinda Champagne
- Aix-Marseille University, C2VN, INSERM 1263, INRA 1260, Marseille, France
| | - Paul-Rémi Petit
- Department of Hematology and Vascular Biology, CHU La Conception, APHM, Marseille, France
| | - Aude Eugène
- Department of Hematology and Vascular Biology, CHU La Conception, APHM, Marseille, France
| | - Corinne Chareyre
- Aix-Marseille University, C2VN, INSERM 1263, INRA 1260, Marseille, France
| | - Anne-Claire Duchez
- Aix-Marseille University, C2VN, INSERM 1263, INRA 1260, Marseille, France
| | - Mélanie Vélier
- Aix-Marseille University, C2VN, INSERM 1263, INRA 1260, Marseille, France.,Department of Hematology and Vascular Biology, CHU La Conception, APHM, Marseille, France
| | - Shirley Fritz
- Department of Hematology and Vascular Biology, CHU La Conception, APHM, Marseille, France
| | - Loris Vallier
- Aix-Marseille University, C2VN, INSERM 1263, INRA 1260, Marseille, France
| | - Romaric Lacroix
- Aix-Marseille University, C2VN, INSERM 1263, INRA 1260, Marseille, France.,Department of Hematology and Vascular Biology, CHU La Conception, APHM, Marseille, France
| | - Françoise Dignat-George
- Aix-Marseille University, C2VN, INSERM 1263, INRA 1260, Marseille, France.,Department of Hematology and Vascular Biology, CHU La Conception, APHM, Marseille, France
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Tan YY, O'Dea K, Patel B, Takata M. Investigation of Microvesicle Uptake by Mouse Lung-marginated Monocytes in vitro. Bio Protoc 2022; 12:e4307. [DOI: 10.21769/bioprotoc.4307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 11/19/2021] [Accepted: 11/29/2021] [Indexed: 11/02/2022] Open
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10
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Maile R, Willis ML, Herring LE, Prevatte A, Mahung C, Cairns B, Wallet S, Coleman LG. Burn Injury Induces Proinflammatory Plasma Extracellular Vesicles That Associate with Length of Hospital Stay in Women: CRP and SAA1 as Potential Prognostic Indicators. Int J Mol Sci 2021; 22:10083. [PMID: 34576246 PMCID: PMC8468249 DOI: 10.3390/ijms221810083] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 09/08/2021] [Accepted: 09/14/2021] [Indexed: 12/19/2022] Open
Abstract
Severe burn injury is a devastating form of trauma that results in persistent immune dysfunction with associated morbidity and mortality. The underlying drivers of this immune dysfunction remain elusive, and there are no prognostic markers to identify at-risk patients. Extracellular vesicles (EVs) are emerging as drivers of immune dysfunction as well as biomarkers. We investigated if EVs after burn injury promote macrophage activation and assessed if EV contents can predict length of hospital stay. EVs isolated early from mice that received a 20% total body surface area (TBSA) burn promoted proinflammatory responses in cultured splenic macrophages. Unbiased LC-MS/MS proteomic analysis of early EVs (<72 h post-injury) from mice and humans showed some similarities including enrichment of acute phase response proteins such as CRP and SAA1. Semi-unbiased assessment of early human burn patient EVs found alterations consistent with increased proinflammatory signaling and loss of inhibition of CRP expression. In a sample of 50 patients with large burn injury, EV SAA1 and CRP were correlated with TBSA injury in both sexes and were correlated with length of hospital stay in women. These findings suggest that EVs are drivers of immune responses after burn injury and their content may predict hospital course.
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Affiliation(s)
- Robert Maile
- Curriculum in Toxicology and Environmental Medicine, North Carolina Jaycee Burn Center, Department of Surgery, Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; (R.M.); (B.C.)
| | - Micah L. Willis
- Curriculum in Toxicology and Environmental Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA;
| | - Laura E. Herring
- Department of Pharmacology, School of Medicine, UNC Proteomics Core Facility, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; (L.E.H.); (A.P.)
| | - Alex Prevatte
- Department of Pharmacology, School of Medicine, UNC Proteomics Core Facility, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; (L.E.H.); (A.P.)
| | - Cressida Mahung
- North Carolina Jaycee Burn Center, Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA;
| | - Bruce Cairns
- Curriculum in Toxicology and Environmental Medicine, North Carolina Jaycee Burn Center, Department of Surgery, Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; (R.M.); (B.C.)
| | - Shannon Wallet
- Department of Microbiology and Immunology, Division of Oral and Craniofacial Health Sciences, Adams School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA;
| | - Leon G. Coleman
- Bowles Center for Alcohol Studies, Department of Pharmacology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
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Willis ML, Mahung C, Wallet SM, Barnett A, Cairns BA, Coleman LG, Maile R. Plasma extracellular vesicles released after severe burn injury modulate macrophage phenotype and function. J Leukoc Biol 2021; 111:33-49. [PMID: 34342045 DOI: 10.1002/jlb.3mia0321-150rr] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Extracellular vesicles (EVs) have emerged as key regulators of immune function across multiple diseases. Severe burn injury is a devastating trauma with significant immune dysfunction that results in an ∼12% mortality rate due to sepsis-induced organ failure, pneumonia, and other infections. Severe burn causes a biphasic immune response: an early (0-72 h) hyper-inflammatory state, with release of damage-associated molecular pattern molecules, such as high-mobility group protein 1 (HMGB1), and proinflammatory cytokines (e.g., IL-1β), followed by an immunosuppressive state (1-2+ wk post injury), associated with increased susceptibility to life-threatening infections. We have reported that early after severe burn injury HMGB1 and IL-1β are enriched in plasma EVs. Here we tested the impact of EVs isolated after burn injury on phenotypic and functional consequences in vivo and in vitro using adoptive transfers of EV. EVs isolated early from mice that underwent a 20% total body surface area burn injury (burn EVs) caused similar hallmark cytokine responses in naïve mice to those seen in burned mice. Burn EVs transferred to RAW264.7 macrophages caused similar functional (i.e., cytokine secretion) and immune gene expression changes seen with their associated phase of post-burn immune dysfunction. Burn EVs isolated early (24 h) induced MCP-1, IL-12p70, and IFNγ, whereas EVs isolated later blunted RAW proinflammatory responses to bacterial endotoxin (LPS). We also describe significantly increased HMGB1 cargo in burn EVs purified days 1 to 7 after injury. Thus, burn EVs cause immune outcomes in naïve mice and macrophages similar to findings after severe burn injury, suggesting EVs promote post-burn immune dysfunction.
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Affiliation(s)
- Micah L Willis
- Curriculum in Toxicology and Environmental Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Cressida Mahung
- North Carolina Jaycee Burn Center Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Shannon M Wallet
- Adams School of Dentistry, Division of Oral and Craniofacial Health Sciences, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.,Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Alexandra Barnett
- Department of Pharmacology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Bruce A Cairns
- Curriculum in Toxicology and Environmental Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.,North Carolina Jaycee Burn Center Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.,Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Leon G Coleman
- Department of Pharmacology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Robert Maile
- Curriculum in Toxicology and Environmental Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.,North Carolina Jaycee Burn Center Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.,Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
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12
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Liu T, Wang J, Yuan Y, Wu J, Wang C, Gu Y, Li H. Early warning of bloodstream infection in elderly patients with circulating microparticles. Ann Intensive Care 2021; 11:110. [PMID: 34255213 PMCID: PMC8276897 DOI: 10.1186/s13613-021-00901-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 07/04/2021] [Indexed: 11/16/2022] Open
Abstract
Background The difficulty of early diagnosis of bloodstream infection in the elderly patients leads to high mortality. Therefore, it is essential to determine some new methods of early warning of bloodstream infection in the elderly patients for timely adjustment of treatment and improvement of prognosis. Methods Patients aged over 65 years with suspected bloodstream infections were included and divided into bloodstream infection (BSI) and non-bloodstream infection (non-BSI) groups based on blood culture results. The morphology of microparticles (MPs) was observed by using transmission electron microscopy, and the number of MPs was dynamically monitored by flow cytometry. Results A total of 140 patients were included in the study: 54 in the BSI group and 86 in the non-BSI group. Total MPs (T-MPs) ≥ 6000 events/µL (OR, 7.693; 95% CI 2.944–20.103, P < 0.0001), neutrophil-derived MPs (NMPs) ≥ 500 events/µL (OR, 12.049; 95% CI 3.574–40.623, P < 0.0001), and monocyte counts ≤ 0.4 × 109/L (OR, 3.637; 95% CI 1.415–9.348, P = 0.007) within 6 h of fever were independently associated with bloodstream infection in the elderly patients. We also developed an early warning model for bloodstream infection in the elderly patients with an area under the curve of 0.884 (95% CI 0.826–0.942, P < 0.0001), sensitivity of 86.8%, specificity of 76.5%, positive predictive value of 70.8%, and negative predictive value of 89.8%. Conclusion The early warning model of bloodstream infection based on circulating T-MPs, NMPs, and monocyte counts within 6 h of fever in the elderly patients was helpful in early detection of bloodstream infection and therefore promptly adjustment of treatment plan. Supplementary Information The online version contains supplementary material available at 10.1186/s13613-021-00901-w.
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Affiliation(s)
- Tingting Liu
- Department of Pulmonary and Critical Care Medicine, The Second Medical Center, National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital, Beijing, 100853, China
| | - Jiang Wang
- Centre of Pulmonary and Critical Care Medicine, Chinese PLA General Hospital, Beijing, 100853, China
| | - Yaping Yuan
- Department of Pulmonary and Critical Care Medicine, The Second Medical Center, National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital, Beijing, 100853, China
| | - Jionghe Wu
- Department of Pulmonary and Critical Care Medicine, The Second Medical Center, National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital, Beijing, 100853, China
| | - Chao Wang
- Department of Pulmonary and Critical Care Medicine, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, 100853, China
| | - Yueqin Gu
- Department of Pulmonary and Critical Care Medicine, The Second Medical Center, National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital, Beijing, 100853, China
| | - Hongxia Li
- Department of Pulmonary and Critical Care Medicine, The Second Medical Center, National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital, Beijing, 100853, China.
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13
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Bedside Allogeneic Erythrocyte Washing with a Cell Saver to Remove Cytokines, Chemokines, and Cell-derived Microvesicles. Anesthesiology 2021; 134:395-404. [PMID: 33503656 DOI: 10.1097/aln.0000000000003689] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Removal of cytokines, chemokines, and microvesicles from the supernatant of allogeneic erythrocytes may help mitigate adverse transfusion reactions. Blood bank-based washing procedures present logistical difficulties; therefore, we tested the hypothesis that on-demand bedside washing of allogeneic erythrocyte units is capable of removing soluble factors and is feasible in a clinical setting. METHODS There were in vitro and prospective, observation cohort components to this a priori planned substudy evaluating bedside allogeneic erythrocyte washing, with a cell saver, during cardiac surgery. Laboratory data were collected from the first 75 washed units given to a subset of patients nested in the intervention arm of a parent clinical trial. Paired pre- and postwash samples from the blood unit bags were centrifuged. The supernatant was aspirated and frozen at -70°C, then batch-tested for cell-derived microvesicles, soluble CD40 ligand, chemokine ligand 5, and neutral lipids (all previously associated with transfusion reactions) and cell-free hemoglobin (possibly increased by washing). From the entire cohort randomized to the intervention arm of the trial, bedside washing was defined as feasible if at least 75% of prescribed units were washed per protocol. RESULTS Paired data were available for 74 units. Washing reduced soluble CD40 ligand (median [interquartile range]; from 143 [1 to 338] ng/ml to zero), chemokine ligand 5 (from 1,314 [715 to 2,551] to 305 [179 to 488] ng/ml), and microvesicle numbers (from 6.90 [4.10 to 20.0] to 0.83 [0.33 to 2.80] × 106), while cell-free hemoglobin concentration increased from 72.6 (53.6 to 171.6) mg/dl to 210.5 (126.6 to 479.6) mg/dl (P < 0.0001 for each). There was no effect on neutral lipids. Bedside washing was determined as feasible for 80 of 81 patients (99%); overall, 293 of 314 (93%) units were washed per protocol. CONCLUSIONS Bedside erythrocyte washing was clinically feasible and greatly reduced concentrations of soluble factors thought to be associated with transfusion-related adverse reactions, increasing concentrations of cell-free hemoglobin while maintaining acceptable (less than 0.8%) hemolysis. EDITOR’S PERSPECTIVE
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14
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Abstract
Traumatic injuries are a leading cause of death and disability in both military and civilian populations. Given the complexity and diversity of traumatic injuries, novel and individualized treatment strategies are required to optimize outcomes. Cellular therapies have potential benefit for the treatment of acute or chronic injuries, and various cell-based pharmaceuticals are currently being tested in preclinical studies or in clinical trials. Cellular therapeutics may have the ability to complement existing therapies, especially in restoring organ function lost due to tissue disruption, prolonged hypoxia or inflammatory damage. In this article we highlight the current status and discuss future directions of cellular therapies for the treatment of traumatic injury. Both published research and ongoing clinical trials are discussed here.
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15
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Behrens F, Holle J, Kuebler WM, Simmons S. Extracellular vesicles as regulators of kidney function and disease. Intensive Care Med Exp 2020; 8:22. [PMID: 33336297 PMCID: PMC7746786 DOI: 10.1186/s40635-020-00306-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 05/21/2020] [Indexed: 12/16/2022] Open
Abstract
Extracellular vesicles (EVs) are small, lipid bilayer-delimited particles of cellular origin that recently gained increasing attention for their potential use as diagnostic biomarkers, and beyond that for their role in intercellular communication and as regulators of homeostatic and disease processes. In acute kidney injury (AKI) and chronic kidney disease (CKD), the potential use of EVs as diagnostic and prognostic markers has been evaluated in a series of clinical studies and contributions to pathophysiologic pathways have been investigated in experimental models. While EV concentrations in biofluids could not distinguish renal patients from healthy subjects or determine disease progression, specific EV subpopulations have been identified that may provide useful diagnostic and prognostic tools in AKI. Specific EV subpopulations are also associated with clinical complications in sepsis-induced AKI and in CKD. Beyond their role as biomarkers, pathophysiologic involvement of EVs has been shown in hemolytic uremic syndrome- and sepsis-induced AKI as well as in cardiovascular complications of CKD. On the other hand, some endogenously formed or therapeutically applied EVs demonstrate protective effects pointing toward their usefulness as emerging treatment strategy in kidney disease.
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Affiliation(s)
- Felix Behrens
- Institute of Physiology, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany.,Department of Pediatric Gastroenterology, Nephrology and Metabolic Diseases, Charité - Universitätsmedizin Berlin, Augustenburger Platz 1, 13353, Berlin, Germany
| | - Johannes Holle
- Department of Pediatric Gastroenterology, Nephrology and Metabolic Diseases, Charité - Universitätsmedizin Berlin, Augustenburger Platz 1, 13353, Berlin, Germany
| | - Wolfgang M Kuebler
- Institute of Physiology, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany. .,DZHK (German Centre for Cardiovascular Research), partner site Berlin, 10117, Berlin, Germany. .,The Keenan Research Centre for Biomedical Science at St. Michael's, Toronto, Canada. .,Departments of Surgery and Physiology, University of Toronto, Toronto, Canada.
| | - Szandor Simmons
- Institute of Physiology, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Berlin, 10117, Berlin, Germany
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16
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The Functional Heterogeneity of Neutrophil-Derived Extracellular Vesicles Reflects the Status of the Parent Cell. Cells 2020; 9:cells9122718. [PMID: 33353087 PMCID: PMC7766779 DOI: 10.3390/cells9122718] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 12/12/2020] [Accepted: 12/15/2020] [Indexed: 12/16/2022] Open
Abstract
Similar to other cell types, neutrophilic granulocytes also release extracellular vesicles (EVs), mainly medium-sized microvesicles/microparticles. According to published data, authors have reached a consensus on the physical parameters (size, density) and chemical composition (surface proteins, proteomics) of neutrophil-derived EVs. In contrast, there is large diversity and even controversy in the reported functional properties. Part of the discrepancy may be ascribed to differences in the viability of the starting cells, in eliciting factors, in separation techniques and in storage conditions. However, the most recent data from our laboratory prove that the same population of neutrophils is able to generate EVs with different functional properties, transmitting pro-inflammatory or anti-inflammatory effects on neighboring cells. Previously we have shown that Mac-1 integrin is a key factor that switches anti-inflammatory EV generation into pro-inflammatory and antibacterial EV production. This paper reviews current knowledge on the functional alterations initiated by neutrophil-derived EVs, listing their effects according to the triggering agents and target cells. We summarize the presence of neutrophil-derived EVs in pathological processes and their perspectives in diagnostics and therapy. Finally, the functional heterogeneity of differently triggered EVs indicates that neutrophils are capable of producing a broad spectrum of EVs, depending on the environmental conditions prevailing at the time of EV genesis.
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17
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Soni S, Garner JL, O'Dea KP, Koh M, Finney L, Tirlapur N, Srikanthan K, Tenda ED, Aboelhassan AM, Singh S, Wilson MR, Wedzicha JA, Kemp SV, Usmani OS, Shah PL, Takata M. Intra-alveolar neutrophil-derived microvesicles are associated with disease severity in COPD. Am J Physiol Lung Cell Mol Physiol 2020; 320:L73-L83. [PMID: 33146567 DOI: 10.1152/ajplung.00099.2020] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Despite advances in the pathophysiology of chronic obstructive pulmonary disease (COPD), there is a distinct lack of biochemical markers to aid clinical management. Microvesicles (MVs) have been implicated in the pathophysiology of inflammatory diseases including COPD, but their association to COPD disease severity remains unknown. We analyzed different MV populations in plasma and bronchoalveolar lavage fluid (BALF) taken from 62 patients with mild to very severe COPD (51% male; mean age: 65.9 yr). These patients underwent comprehensive clinical evaluation (symptom scores, lung function, and exercise testing), and the capacity of MVs to be clinical markers of disease severity was assessed. We successfully identified various MV subtype populations within BALF [leukocyte, polymorphonuclear leukocyte (PMN; i.e., neutrophil), monocyte, epithelial, and platelet MVs] and plasma (leukocyte, PMN, monocyte, and endothelial MVs) and compared each MV population to disease severity. BALF neutrophil MVs were the only population to significantly correlate with the clinical evaluation scores including forced expiratory volume in 1 s, modified Medical Research Council dyspnea score, 6-min walk test, hyperinflation, and gas transfer. BALF neutrophil MVs, but not neutrophil cell numbers, also strongly correlated with BODE index. We have undertaken, for the first time, a comprehensive evaluation of MV profiles within BALF/plasma of COPD patients. We demonstrate that BALF levels of neutrophil-derived MVs are unique in correlating with a number of key functional and clinically relevant disease severity indexes. Our results show the potential of BALF neutrophil MVs for a COPD biomarker that tightly links a key pathophysiological mechanism of COPD (intra-alveolar neutrophil activation) with clinical severity/outcome.
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Affiliation(s)
- Sanooj Soni
- Division of Anaesthetics, Pain Medicine and Intensive Care, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital, London, United Kingdom
| | - Justin L Garner
- Royal Brompton Hospital, Respiratory Medicine, London, United Kingdom.,Chelsea and Westminster Hospital, Respiratory Medicine, London, United Kingdom.,National Heart and Lung Institute, Imperial College London, Royal Brompton Hospital, London, United Kingdom
| | - Kieran P O'Dea
- Division of Anaesthetics, Pain Medicine and Intensive Care, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital, London, United Kingdom
| | - Marissa Koh
- Division of Anaesthetics, Pain Medicine and Intensive Care, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital, London, United Kingdom
| | - Lydia Finney
- Royal Brompton Hospital, Respiratory Medicine, London, United Kingdom.,National Heart and Lung Institute, Imperial College London, Royal Brompton Hospital, London, United Kingdom
| | - Nikhil Tirlapur
- Division of Anaesthetics, Pain Medicine and Intensive Care, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital, London, United Kingdom
| | - Karthi Srikanthan
- Royal Brompton Hospital, Respiratory Medicine, London, United Kingdom.,Chelsea and Westminster Hospital, Respiratory Medicine, London, United Kingdom.,National Heart and Lung Institute, Imperial College London, Royal Brompton Hospital, London, United Kingdom
| | - Eric D Tenda
- Royal Brompton Hospital, Respiratory Medicine, London, United Kingdom.,Chelsea and Westminster Hospital, Respiratory Medicine, London, United Kingdom.,National Heart and Lung Institute, Imperial College London, Royal Brompton Hospital, London, United Kingdom
| | - Arafa M Aboelhassan
- Royal Brompton Hospital, Respiratory Medicine, London, United Kingdom.,Chelsea and Westminster Hospital, Respiratory Medicine, London, United Kingdom
| | - Suveer Singh
- Royal Brompton Hospital, Respiratory Medicine, London, United Kingdom.,Chelsea and Westminster Hospital, Respiratory Medicine, London, United Kingdom.,National Heart and Lung Institute, Imperial College London, Royal Brompton Hospital, London, United Kingdom
| | - Michael R Wilson
- Division of Anaesthetics, Pain Medicine and Intensive Care, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital, London, United Kingdom
| | - Jadwiga A Wedzicha
- Royal Brompton Hospital, Respiratory Medicine, London, United Kingdom.,National Heart and Lung Institute, Imperial College London, Royal Brompton Hospital, London, United Kingdom
| | - Samuel V Kemp
- Royal Brompton Hospital, Respiratory Medicine, London, United Kingdom
| | - Omar S Usmani
- Royal Brompton Hospital, Respiratory Medicine, London, United Kingdom.,National Heart and Lung Institute, Imperial College London, Royal Brompton Hospital, London, United Kingdom
| | - Pallav L Shah
- Royal Brompton Hospital, Respiratory Medicine, London, United Kingdom.,Chelsea and Westminster Hospital, Respiratory Medicine, London, United Kingdom.,National Heart and Lung Institute, Imperial College London, Royal Brompton Hospital, London, United Kingdom
| | - Masao Takata
- Division of Anaesthetics, Pain Medicine and Intensive Care, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital, London, United Kingdom
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18
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Baxter AA. Stoking the Fire: How Dying Cells Propagate Inflammatory Signalling through Extracellular Vesicle Trafficking. Int J Mol Sci 2020; 21:ijms21197256. [PMID: 33019535 PMCID: PMC7583891 DOI: 10.3390/ijms21197256] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 09/28/2020] [Accepted: 09/28/2020] [Indexed: 02/07/2023] Open
Abstract
Communication between dying cells and their environment is a critical process that promotes tissue homeostasis during normal cellular turnover, whilst during disease settings, it can contribute to inflammation through the release of intracellular factors. Extracellular vesicles (EVs) are a heterogeneous class of membrane-bound cell-derived structures that can engage in intercellular communication via the trafficking of bioactive molecules between cells and tissues. In addition to the well-described functions of EVs derived from living cells, the ability of dying cells to release EVs capable of mediating functions on target cells or tissues is also of significant interest. In particular, during inflammatory settings such as acute tissue injury, infection and autoimmunity, the EV-mediated transfer of proinflammatory cargo from dying cells is an important process that can elicit profound proinflammatory effects in recipient cells and tissues. Furthermore, the biogenesis of EVs via unique cell-death-associated pathways has also been recently described, highlighting an emerging niche in EV biology. This review outlines the mechanisms and functions of dying-cell-derived EVs and their ability to drive inflammation during various modes of cell death, whilst reflecting on the challenges and knowledge gaps in investigating this subgenre of extracellular vesicles research.
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Affiliation(s)
- Amy A Baxter
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC 3086, Australia
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19
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Karasu E, Demmelmaier J, Kellermann S, Holzmann K, Köhl J, Schmidt CQ, Kalbitz M, Gebhard F, Huber-Lang MS, Halbgebauer R. Complement C5a Induces Pro-inflammatory Microvesicle Shedding in Severely Injured Patients. Front Immunol 2020; 11:1789. [PMID: 32983087 PMCID: PMC7492592 DOI: 10.3389/fimmu.2020.01789] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 07/06/2020] [Indexed: 12/12/2022] Open
Abstract
Initially underestimated as platelet dust, extracellular vesicles are continuously gaining interest in the field of inflammation. Various studies addressing inflammatory diseases have shown that microvesicles (MVs) originating from different cell types are systemic transport vehicles carrying distinct cargoes to modulate immune responses. In this study, we focused on the clinical setting of multiple trauma, which is characterized by activation and dysfunction of both, the fluid-phase and the cellular component of innate immunity. Given the sensitivity of neutrophils for the complement anaphylatoxin C5a, we hypothesized that increased C5a production induces alterations in MV shedding of neutrophils resulting in neutrophil dysfunction that fuels posttraumatic inflammation. In a mono-centered prospective clinical study with polytraumatized patients, we found significantly increased granulocyte-derived MVs containing the C5a receptor (C5aR1, CD88) on their surface. This finding was accompanied by a concomitant loss of C5aR1 on granulocytes indicative of an impaired cellular chemotactic and pro-inflammatory neutrophil functions. Furthermore, in vitro exposure of human neutrophils (from healthy volunteers) to C5a significantly increased MV shedding and C5aR1 loss on neutrophils, which could be blocked using the C5aR1 antagonist PMX53. Mechanistic analyses revealed that the interaction between C5aR1 signaling and the small GTPase Arf6 acts as a molecular switch for MV shedding. When neutrophil derived, C5a-induced MV were exposed to a complex ex vivo whole blood model significant pro-inflammatory properties (NADPH activity, ROS and MPO generation) of the MVs became evident. C5a-induced MVs activated resting neutrophils and significantly induced IL-6 secretion. These data suggest a novel role of the C5a-C5aR1 axis: C5a-induced MV shedding from neutrophils results in decreased C5aR1 surface expression on the one hand, on the other hand it leads to profound inflammatory signals which likely are both key drivers of the neutrophil dysfunction which is regularly observed in patients suffering from multiple traumatic injuries.
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Affiliation(s)
- Ebru Karasu
- Institute of Clinical and Experimental Trauma Immunology, University Hospital Ulm, Ulm, Germany
| | - Julia Demmelmaier
- Institute of Clinical and Experimental Trauma Immunology, University Hospital Ulm, Ulm, Germany
| | - Stephanie Kellermann
- Institute of Clinical and Experimental Trauma Immunology, University Hospital Ulm, Ulm, Germany
| | - Karlheinz Holzmann
- Center for Biomedical Research, Genomics-Core Facility, Ulm University, Ulm, Germany
| | - Jörg Köhl
- Institute for Systemic Inflammation Research (ISEF), University of Lübeck, Lübeck, Germany.,Division of Immunobiology, Cincinnati Children's Hospital, Cincinnati, OH, United States
| | - Christoph Q Schmidt
- Institute of Pharmacology of Natural Products and Clinical Pharmacology, Ulm University, Ulm, Germany
| | - Miriam Kalbitz
- Department of Traumatology, Hand-, Plastic- and Reconstructive Surgery, Center of Surgery, University of Ulm Medical School, Ulm, Germany
| | - Florian Gebhard
- Department of Traumatology, Hand-, Plastic- and Reconstructive Surgery, Center of Surgery, University of Ulm Medical School, Ulm, Germany
| | - Markus S Huber-Lang
- Institute of Clinical and Experimental Trauma Immunology, University Hospital Ulm, Ulm, Germany
| | - Rebecca Halbgebauer
- Institute of Clinical and Experimental Trauma Immunology, University Hospital Ulm, Ulm, Germany
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20
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Integrin and PD-1 Ligand Expression on Circulating Extracellular Vesicles in Systemic Inflammatory Response Syndrome and Sepsis. Shock 2020; 52:13-22. [PMID: 30036273 DOI: 10.1097/shk.0000000000001228] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Extracellular vesicles (EVs) in the plasma mediate important intercellular communications in the pathogenesis of cancer and inflammatory diseases. EVs express integrins that regulate target specificities and programmed cell death ligand 1 and 2 (PD-L1 and 2) that suppress lymphocyte activation. However, the roles of these molecules on EVs in systemic inflammatory response syndrome (SIRS) and sepsis remain little understood. This study aimed to investigate how the EV expression of integrins and PD-1 ligands might differ in SIRS and sepsis, compared with healthy controls, and to correlate their expression with the clinical parameters reflecting pathogenesis. Twenty-seven SIRS patients without sepsis, 27 sepsis patients, and 18 healthy volunteers were included. EVs were isolated from plasma samples. The expression of three major integrins (β1, β2, β3 integrins) and PD-L1 and 2 were measured. The EV expression of β2 integrin and PD-L2 was significantly increased in sepsis patients compared with healthy controls. EV expression of PD-L1 was not elevated in sepsis and SIRS; however, circulating soluble PD-L1 levels were significantly higher in sepsis. Furthermore, EV expression of β2 integrin in sepsis patients correlated with hypotension and reduced kidney function. In addition, soluble PD-L1 levels correlated with sepsis severity, impaired kidney function, and impaired central nervous system function. These results suggest the potential involvements of the EV β2 integrin, as well as EV PD-L2 and soluble PD-L1, in the septic pathogenesis that occurs with the systemic immune activation leading to multiple organ dysfunctions.
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21
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Wen H, Xing L, Sun K, Xiao C, Meng X, Yang J. Loganin attenuates intestinal injury in severely burned rats by regulating the toll-like receptor 4/NF-κB signaling pathway. Exp Ther Med 2020; 20:591-598. [PMID: 32537017 DOI: 10.3892/etm.2020.8725] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 12/04/2019] [Indexed: 12/21/2022] Open
Abstract
Severe burns may lead to intestinal inflammation and oxidative stress, resulting in intestinal barrier damage and gut dysfunction. Loganin, an iridoid glycoside compound, has been isolated from Cornus officinalis Sieb. et Zucc; however, its role in the treatment of burn injury is yet to be fully elucidated. Therefore, the present study examined the effect of loganin administration on burn-induced intestinal inflammation and oxidative stress after severe burns in male Sprague-Dawley rats. Histological injury was assessed by hematoxylin and eosin staining. Furthermore, cytokine expression in intestinal tissues was measured by ELISA and reverse transcription-quantitative PCR. Antioxidative activities were assessed by determining the levels of reactive oxygen species (ROS), superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-Px) and malondialdehyde (MDA). Apoptosis was detected by flow cytometry. Apoptosis-related proteins, toll-like receptor 4 (TLR4) protein and NF-κB translocation were examined by western blotting. Immunohistochemical staining was used to observe TLR4 and NF-κB p65 expression in intestinal tissues. The present study suggested that loganin administration significantly reduced burn injury-induced intestinal histological changes, tumor necrosis factor-α, interleukin (IL)-6 and IL-1β production and oxidative stress, evidenced by decreased ROS levels and MDA content (P<0.05). Furthermore, loganin increased SOD, CAT and GSH-Px levels and intestinal epithelial cell apoptosis. Loganin treatment also significantly inhibited activation of the TLR4/NF-κB signaling pathway in the intestine of severely burned rats (P<0.05). In conclusion, loganin reduced burns-induced intestinal inflammation and oxidative stress, potentially by regulating the TLR4/NF-κB signaling pathway.
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Affiliation(s)
- Hailing Wen
- Department of Burns and Plastic Surgery, Affiliated Hospital of Chengde Medical University, Chengde, Hebei 067000, P.R. China
| | - Liang Xing
- Department of Burns and Plastic Surgery, The First Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Kui Sun
- Department of Burns and Plastic Surgery, Affiliated Hospital of Chengde Medical University, Chengde, Hebei 067000, P.R. China
| | - Changshuan Xiao
- Department of Burns and Plastic Surgery, Affiliated Hospital of Chengde Medical University, Chengde, Hebei 067000, P.R. China
| | - Xiangxi Meng
- Department of Burns and Plastic Surgery, Affiliated Hospital of Chengde Medical University, Chengde, Hebei 067000, P.R. China
| | - Jingzhe Yang
- Department of Burns and Plastic Surgery, Affiliated Hospital of Chengde Medical University, Chengde, Hebei 067000, P.R. China
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22
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Abstract
PURPOSE OF REVIEW Extracellular vesicles released by prokaryote or eukaryote cells are emerging as mechanisms of cell-to-cell communication, by either physically interacting with the surface of target cells or transferring proteins/peptides, lipids, carbohydrates, and nuclei acids to acceptor cells. Accumulating evidence indicates that extracellular vesicles, among other functions, regulate innate and adaptive immune responses. We revisit here the effects that extracellular vesicles of various origins have on innate immunity. RECENT FINDINGS Extracellular vesicles comprise a heterogeneous group of vesicles with different biogenesis, composition and biological properties, which include exosomes, microvesicles, apoptotic cell-derived extracellular vesicles, and other extracellular vesicles still not well characterized. Extracellular vesicles released by pathogens, leukocytes, nonhematopoietic cells, tumor cells, and likely allografts, can either stimulate or suppress innate immunity via multiple mechanisms. These include transfer to target leukocytes of pro-inflammatory or anti-inflammatory mediators, membrane receptors, enzymes, mRNAs, and noncoding RNAs; and interaction of extracellular vesicles with the complement and coagulation systems. As a result, extracellular vesicles affect differentiation, polarization, activation, tissue recruitment, cytokine and chemokine production, cytolytic and phagocytic function, and antigen transfer ability, of different types of innate immune cells. SUMMARY The field of intercellular communication via extracellular vesicles is a rapid evolving area and the effects of pathogen-derived and host-derived extracellular vesicles on innate immunity in particular, have received increasing attention during the past decade. Future studies will be necessary to assess the full potential of the crosstalk between extracellular vesicles and the innate immune system and its use for therapeutic applications to treat chronic inflammation-based diseases and cancer growth and dissemination, among the growing list of disorders in which the innate immune system plays a critical role.
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O'Dea KP, Tan YY, Shah S, V Patel B, C Tatham K, Wilson MR, Soni S, Takata M. Monocytes mediate homing of circulating microvesicles to the pulmonary vasculature during low-grade systemic inflammation. J Extracell Vesicles 2020; 9:1706708. [PMID: 32002170 PMCID: PMC6968433 DOI: 10.1080/20013078.2019.1706708] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 12/07/2019] [Accepted: 12/13/2019] [Indexed: 01/08/2023] Open
Abstract
Microvesicles (MVs), a plasma membrane-derived subclass of extracellular vesicles, are produced and released into the circulation during systemic inflammation, yet little is known of cell/tissue-specific uptake of MVs under these conditions. We hypothesized that monocytes contribute to uptake of circulating MVs and that their increased margination to the pulmonary circulation and functional priming during systemic inflammation produces substantive changes to the systemic MV homing profile. Cellular uptake of i.v.-injected, fluorescently labelled MVs (J774.1 macrophage-derived) in vivo was quantified by flow cytometry in vascular cell populations of the lungs, liver and spleen of C57BL6 mice. Under normal conditions, both Ly6Chigh and Ly6Clow monocytes contributed to MV uptake but liver Kupffer cells were the dominant target cell population. Following induction of sub-clinical endotoxemia with low-dose i.v. LPS, MV uptake by lung-marginated Ly6Chigh monocytes increased markedly, both at the individual cell level (~2.5-fold) and through substantive expansion of their numbers (~8-fold), whereas uptake by splenic macrophages was unchanged and uptake by Kupffer cells actually decreased (~50%). Further analysis of MV uptake within the pulmonary vasculature using a combined model approach of in vivo macrophage depletion, ex vivo isolated perfused lungs and in vitro lung perfusate cell-based assays, indicated that Ly6Chigh monocytes possess a high MV uptake capacity (equivalent to Kupffer cells), that is enhanced directly by endotoxemia and ablated in the presence of phosphatidylserine (PS)-enriched liposomes and β3 integrin receptor blocking peptide. Accordingly, i.v.-injected PS-enriched liposomes underwent a redistribution of cellular uptake during endotoxemia similar to MVs, with enhanced uptake by Ly6Chigh monocytes and reduced uptake by Kupffer cells. These findings indicate that monocytes, particularly lung-marginated Ly6Chigh subset monocytes, become a dominant target cell population for MVs during systemic inflammation, with significant implications for the function and targeting of endogenous and therapeutically administered MVs, lending novel insights into the pathophysiology of pulmonary vascular inflammation.
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Affiliation(s)
- Kieran P O'Dea
- Section of Anaesthetics, Pain Medicine & Intensive Care, Imperial College London, Chelsea & Westminster Hospital, London, UK
| | - Ying Ying Tan
- Section of Anaesthetics, Pain Medicine & Intensive Care, Imperial College London, Chelsea & Westminster Hospital, London, UK
| | - Sneh Shah
- Section of Anaesthetics, Pain Medicine & Intensive Care, Imperial College London, Chelsea & Westminster Hospital, London, UK
| | - Brijesh V Patel
- Section of Anaesthetics, Pain Medicine & Intensive Care, Imperial College London, Chelsea & Westminster Hospital, London, UK
| | - Kate C Tatham
- Section of Anaesthetics, Pain Medicine & Intensive Care, Imperial College London, Chelsea & Westminster Hospital, London, UK
| | - Mike R Wilson
- Section of Anaesthetics, Pain Medicine & Intensive Care, Imperial College London, Chelsea & Westminster Hospital, London, UK
| | - Sanooj Soni
- Section of Anaesthetics, Pain Medicine & Intensive Care, Imperial College London, Chelsea & Westminster Hospital, London, UK
| | - Masao Takata
- Section of Anaesthetics, Pain Medicine & Intensive Care, Imperial College London, Chelsea & Westminster Hospital, London, UK
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24
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Soni S, Tirlapur N, O'Dea KP, Takata M, Wilson MR. Microvesicles as new therapeutic targets for the treatment of the acute respiratory distress syndrome (ARDS). Expert Opin Ther Targets 2019; 23:931-941. [PMID: 31724440 DOI: 10.1080/14728222.2019.1692816] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Introduction: Acute respiratory distress syndrome (ARDS) is a heterogeneous and multifactorial disease; it is a common and devastating condition that has a high mortality. Treatment is limited to supportive measures hence novel pharmacological approaches are necessary. We propose a new direction in ARDS research; this means moving away from thinking about individual inflammatory mediators and instead investigating how packaged information is transmitted between cells. Microvesicles (MVs) represent a novel vehicle for inter-cellular communication with an emerging role in ARDS pathophysiology.Areas covered: This review examines current approaches to ARDS and emerging MV research. We describe advances in our understanding of microvesicles and focus on their pro-inflammatory roles in airway and endothelial signaling. We also offer reasons for why MVs are attractive therapeutic targets.Expert opinion: MVs have a key role in ARDS pathophysiology. Preclinical studies must move away from simple models toward more realistic scenarios while clinical studies must embrace patient heterogeneity. Microvesicles have the potential to aid identification of patients who may benefit from particular treatments and act as biomarkers of cellular status and disease progression. Understanding microvesicle cargoes and their cellular interactions will undoubtedly uncover new targets for ARDS.
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Affiliation(s)
- Sanooj Soni
- Section of Anaesthetics, Pain Medicine and Intensive Care, Faculty of Medicine, Imperial College London, Chelsea & Westminster Hospital, London, UK
| | - Nikhil Tirlapur
- Section of Anaesthetics, Pain Medicine and Intensive Care, Faculty of Medicine, Imperial College London, Chelsea & Westminster Hospital, London, UK
| | - Kieran P O'Dea
- Section of Anaesthetics, Pain Medicine and Intensive Care, Faculty of Medicine, Imperial College London, Chelsea & Westminster Hospital, London, UK
| | - Masao Takata
- Section of Anaesthetics, Pain Medicine and Intensive Care, Faculty of Medicine, Imperial College London, Chelsea & Westminster Hospital, London, UK
| | - Michael R Wilson
- Section of Anaesthetics, Pain Medicine and Intensive Care, Faculty of Medicine, Imperial College London, Chelsea & Westminster Hospital, London, UK
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25
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Kartchner LB, Gode CJ, Dunn JLM, Glenn LI, Duncan DN, Wolfgang MC, Cairns BA, Maile R. One-hit wonder: Late after burn injury, granulocytes can clear one bacterial infection but cannot control a subsequent infection. Burns 2019; 45:627-640. [PMID: 30833100 DOI: 10.1016/j.burns.2018.08.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 07/04/2018] [Accepted: 08/07/2018] [Indexed: 12/14/2022]
Abstract
OBJECTIVE Burn injury induces an acute hyperactive immune response followed by a chronic immune dysregulation that leaves those afflicted susceptible to multiple secondary infections. Many murine models are able to recapitulate the acute immune response to burn injury, yet few models are able to recapitulate long-term immune suppression and thus chronic susceptibility to bacterial infections seen in burn patients. This has hindered the field, making evaluation of the mechanisms responsible for these susceptibilities difficult to study. Herein we describe a novel mouse model of burn injury that promotes chronic immune suppression allowing for susceptibility to primary and secondary infections and thus allows for the evaluation of associated mechanisms. METHODS C57Bl/6 mice receiving a full-thickness contact burn were infected with Pseudomonas aeruginosa 14 days (primary infection) and/or 17 days (secondary infection) after burn or sham injury. The survival, pulmonary and systemic bacterial load as well as frequency and function of innate immune cells (neutrophils and macrophages) were evaluated. RESULTS Following secondary infection, burn mice were less effective in clearance of bacteria compared to sham injured or burn mice following a primary infection. Following secondary infection both neutrophils and macrophages recruited to the airways exhibited reduced production of anti-bacterial reactive oxygen and nitrogen species and the pro-inflammatory cytokineIL-12 while macrophages demonstrated increased expression of the anti-inflammatory cytokine interleukin-10 compared to those from sham burned mice and/or burn mice receiving a primary infection. In addition the BALF from these mice contained significantly higher level so of the anti-inflammatory cytokine IL-4 compared to those from sham burned mice and/or burn mice receiving a primary infection. CONCLUSIONS Burn-mediated protection from infection is transient, with a secondary infection inducing immune protection to collapse. Repeated infection leads to increased neutrophil and macrophage numbers in the lungs late after burn injury, with diminished innate immune cell function and an increased anti-inflammatory cytokine environment.
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Affiliation(s)
- Laurel B Kartchner
- Department of Microbiology and Immunology, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Cindy J Gode
- Department of Microbiology and Immunology, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA; Marsico Lung Institute/Cystic Fibrosis Research Center, USA
| | - Julia L M Dunn
- Department of Microbiology and Immunology, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Lindsey I Glenn
- Department of Surgery, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Danté N Duncan
- Department of Microbiology and Immunology, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA; Department of Surgery, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Matthew C Wolfgang
- Department of Microbiology and Immunology, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA; Marsico Lung Institute/Cystic Fibrosis Research Center, USA
| | - Bruce A Cairns
- Department of Microbiology and Immunology, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA; Department of Surgery, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA; Jaycee Burn Center, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Robert Maile
- Department of Microbiology and Immunology, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA; Department of Surgery, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA; Jaycee Burn Center, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
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26
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Wang ZE, Wu D, Zheng LW, Shi Y, Wang C, Chen ZH, Peng X. Effects of glutamine on intestinal mucus barrier after burn injury. Am J Transl Res 2018; 10:3833-3846. [PMID: 30662634 PMCID: PMC6291691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Accepted: 11/07/2018] [Indexed: 06/09/2023]
Abstract
Severe burns may cause intense stress and persistent inflammation, resulting in intestinal mucosal barrier damage. In this study, we evaluated the effects of glutamine (Gln) on intestinal mucus barrier after burn injury. The results showed that glutamine could improve intestinal mucosal blood flow (IMBF), decrease diamine oxidase (DAO) activity, and reduce intestine damage, thereby alleviate intestinal mucous permeability. Severe burn was associated with subsequent decrease in mucus thickness, levels of hexose, sialic acid, and protein. Glutamine administration might partially reverse these changes. Additional experiments showed that supplementation with glutamine could markedly raise the content of glutamine, glutathione (GSH), and ATP in intestinal tissue. Moreover, the levels of mRNA and protein expression of MUC2, intestinal trefoil factor (ITF) were increased remarkably, but contrary to the trend of GRP-78, CHOP. These results suggest that glutamine can improve tissue perfusion and increase energy synthesis in enterocytes, decrease endoplasmic reticulum stress (ERS) and improve mucin and ITF synthesis. Finally, lessen intestinal mucus barrier damage after burn injury.
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Affiliation(s)
- Zi-En Wang
- Department of Burns, Union Hospital, Fujian Medical UniversityFuzhou 350001, PR China
| | - Dan Wu
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burns of PLA, Southwest Hospital, Third Military Medical UniversityChongqing 400038, PR China
| | - Lin-Wen Zheng
- Department of Burns, Union Hospital, Fujian Medical UniversityFuzhou 350001, PR China
| | - Yan Shi
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burns of PLA, Southwest Hospital, Third Military Medical UniversityChongqing 400038, PR China
| | - Chao Wang
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burns of PLA, Southwest Hospital, Third Military Medical UniversityChongqing 400038, PR China
| | - Zhao-Hong Chen
- Department of Burns, Union Hospital, Fujian Medical UniversityFuzhou 350001, PR China
| | - Xi Peng
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burns of PLA, Southwest Hospital, Third Military Medical UniversityChongqing 400038, PR China
- Shriners Burns Hospital, Massachusetts General Hospital, Harvard Medical SchoolBoston MA 02114, USA
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27
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Stone Ii R, Natesan S, Kowalczewski CJ, Mangum LH, Clay NE, Clohessy RM, Carlsson AH, Tassin DH, Chan RK, Rizzo JA, Christy RJ. Advancements in Regenerative Strategies Through the Continuum of Burn Care. Front Pharmacol 2018; 9:672. [PMID: 30038569 PMCID: PMC6046385 DOI: 10.3389/fphar.2018.00672] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 06/05/2018] [Indexed: 01/09/2023] Open
Abstract
Burns are caused by several mechanisms including flame, scald, chemical, electrical, and ionizing and non-ionizing radiation. Approximately half a million burn cases are registered annually, of which 40 thousand patients are hospitalized and receive definitive treatment. Burn care is very resource intensive as the treatment regimens and length of hospitalization are substantial. Burn wounds are classified based on depth as superficial (first degree), partial-thickness (second degree), or full-thickness (third degree), which determines the treatment necessary for successful healing. The goal of burn wound care is to fully restore the barrier function of the tissue as quickly as possible while minimizing infection, scarring, and contracture. The aim of this review is to highlight how tissue engineering and regenerative medicine strategies are being used to address the unique challenges of burn wound healing and define the current gaps in care for both partial- and full-thickness burn injuries. This review will present the current standard of care (SOC) and provide information on various treatment options that have been tested pre-clinically or are currently in clinical trials. Due to the complexity of burn wound healing compared to other skin injuries, burn specific treatment regimens must be developed. Recently, tissue engineering and regenerative medicine strategies have been developed to improve skin regeneration that can restore normal skin physiology and limit adverse outcomes, such as infection, delayed re-epithelialization, and scarring. Our emphasis will be centered on how current clinical and pre-clinical research of pharmacological agents, biomaterials, and cellular-based therapies can be applied throughout the continuum of burn care by targeting the stages of wound healing: hemostasis, inflammation, cell proliferation, and matrix remodeling.
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Affiliation(s)
- Randolph Stone Ii
- Combat Trauma and Burn Injury Research, US Army Institute of Surgical Research San Antonio, TX, United States
| | - Shanmugasundaram Natesan
- Combat Trauma and Burn Injury Research, US Army Institute of Surgical Research San Antonio, TX, United States
| | - Christine J Kowalczewski
- Combat Trauma and Burn Injury Research, US Army Institute of Surgical Research San Antonio, TX, United States
| | - Lauren H Mangum
- Combat Trauma and Burn Injury Research, US Army Institute of Surgical Research San Antonio, TX, United States.,Extremity Trauma and Regenerative Medicine, US Army Institute of Surgical Research San Antonio, TX, United States
| | - Nicholas E Clay
- Combat Trauma and Burn Injury Research, US Army Institute of Surgical Research San Antonio, TX, United States
| | - Ryan M Clohessy
- Combat Trauma and Burn Injury Research, US Army Institute of Surgical Research San Antonio, TX, United States
| | - Anders H Carlsson
- Dental and Craniofacial Trauma Research, US Army Institute of Surgical Research San Antonio, TX, United States
| | - David H Tassin
- Dental and Craniofacial Trauma Research, US Army Institute of Surgical Research San Antonio, TX, United States
| | - Rodney K Chan
- Dental and Craniofacial Trauma Research, US Army Institute of Surgical Research San Antonio, TX, United States
| | - Julie A Rizzo
- Burn Flight Team, US Army Institute of Surgical Research San Antonio, TX, United States
| | - Robert J Christy
- Combat Trauma and Burn Injury Research, US Army Institute of Surgical Research San Antonio, TX, United States
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28
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Raeven P, Zipperle J, Drechsler S. Extracellular Vesicles as Markers and Mediators in Sepsis. Am J Cancer Res 2018; 8:3348-3365. [PMID: 29930734 PMCID: PMC6010985 DOI: 10.7150/thno.23453] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 03/14/2018] [Indexed: 01/28/2023] Open
Abstract
Sepsis is defined as life-threatening organ dysfunction caused by a dysregulated host response to infection. It remains a highly lethal condition in which current tools for early diagnosis and therapeutic decision-making are far from ideal. Extracellular vesicles (EVs), 30 nm to several micrometers in size, are released from cells upon activation and apoptosis and express membrane epitopes specific for their parental cells. Since their discovery two decades ago, their role as biomarkers and mediators in various diseases has been intensively studied. However, their potential importance in the sepsis syndrome has gained attention only recently. Sepsis and EVs are both complex fields in which standardization has long been overdue. In this review, several topics are discussed. First, we review current studies on EVs in septic patients with emphasis on their variable quality and clinical utility. Second, we discuss the diagnostic and therapeutic potential of EVs as well as their role as facilitators of cell communication via micro RNA and the relevance of micro-organism-derived EVs. Third, we give an overview over the potential beneficial but also detrimental roles of EVs in sepsis. Finally, we focus on the role of EVs in selected intensive care scenarios such as coagulopathy, mechanical ventilation and blood transfusion. Overall, the prospect for EV use in septic patients is bright, ranging from rapid and precise (point-of-care) diagnostics, prevention of harmful iatrogenic interventions, to using EVs as guides of individualized therapy. Before the above is achieved, however, the EV research field requires reliable standardization of the current methods and development of new analytical procedures that can close the existing technological gaps.
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29
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Danesh A, Inglis HC, Abdel-Mohsen M, Deng X, Adelman A, Schechtman KB, Heitman JW, Vilardi R, Shah A, Keating SM, Cohen MJ, Jacobs ES, Pillai SK, Lacroix J, Spinella PC, Norris PJ. Granulocyte-Derived Extracellular Vesicles Activate Monocytes and Are Associated With Mortality in Intensive Care Unit Patients. Front Immunol 2018; 9:956. [PMID: 29867942 PMCID: PMC5951932 DOI: 10.3389/fimmu.2018.00956] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Accepted: 04/17/2018] [Indexed: 11/13/2022] Open
Abstract
To understand how extracellular vesicle (EV) subtypes differentially activate monocytes, a series of in vitro studies were performed. We found that plasma-EVs biased monocytes toward an M1 profile. Culturing monocytes with granulocyte-, monocyte-, and endothelial-EVs induced several pro-inflammatory cytokines. By contrast, platelet-EVs induced TGF-β and GM-CSF, and red blood cell (RBC)-EVs did not activate monocytes in vitro. The scavenger receptor CD36 was important for binding of RBC-EVs to monocytes, while blockade of CD36, CD163, CD206, TLR1, TLR2, and TLR4 did not affect binding of plasma-EVs to monocytes in vitro. To identify mortality risk factors, multiple soluble factors and EV subtypes were measured in patients' plasma at intensive care unit admission. Of 43 coagulation factors and cytokines measured, two were significantly associated with mortality, tissue plasminogen activator and cystatin C. Of 14 cellular markers quantified on EVs, 4 were early predictors of mortality, including the granulocyte marker CD66b. In conclusion, granulocyte-EVs have potent pro-inflammatory effects on monocytes in vitro. Furthermore, correlation of early granulocyte-EV levels with mortality in critically ill patients provides a potential target for intervention in management of the pro-inflammatory cascade associated with critical illness.
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Affiliation(s)
- Ali Danesh
- Blood Systems Research Institute, San Francisco, CA, United States.,Department of Laboratory Medicine, University of California, San Francisco, San Francisco, CA, United States
| | - Heather C Inglis
- Blood Systems Research Institute, San Francisco, CA, United States
| | - Mohamed Abdel-Mohsen
- Blood Systems Research Institute, San Francisco, CA, United States.,Department of Laboratory Medicine, University of California, San Francisco, San Francisco, CA, United States
| | - Xutao Deng
- Blood Systems Research Institute, San Francisco, CA, United States.,Department of Laboratory Medicine, University of California, San Francisco, San Francisco, CA, United States
| | - Avril Adelman
- Division of Biostatistics, Washington University School of Medicine in St. Louis, St. Louis, MO, United States
| | - Kenneth B Schechtman
- Division of Biostatistics, Washington University School of Medicine in St. Louis, St. Louis, MO, United States.,Department of Medicine, Washington University School of Medicine in St. Louis, St. Louis, MO, United States
| | - John W Heitman
- Blood Systems Research Institute, San Francisco, CA, United States
| | - Ryan Vilardi
- Department of Surgery, University of California, San Francisco, San Francisco, CA, United States
| | - Avani Shah
- Blood Systems Research Institute, San Francisco, CA, United States
| | - Sheila M Keating
- Blood Systems Research Institute, San Francisco, CA, United States.,Department of Laboratory Medicine, University of California, San Francisco, San Francisco, CA, United States
| | - Mitchell J Cohen
- Department of Surgery, University of California, San Francisco, San Francisco, CA, United States
| | - Evan S Jacobs
- Blood Systems Research Institute, San Francisco, CA, United States
| | - Satish K Pillai
- Blood Systems Research Institute, San Francisco, CA, United States.,Department of Laboratory Medicine, University of California, San Francisco, San Francisco, CA, United States
| | - Jacques Lacroix
- Centre Hospitalier Universitaire (CHU) Sainte-Justine, Université de Montréal, Montreal, QC, Canada
| | - Philip C Spinella
- Department of Pediatrics, Washington University School of Medicine in St. Louis, St. Louis, MO, United States
| | - Philip J Norris
- Blood Systems Research Institute, San Francisco, CA, United States.,Department of Laboratory Medicine, University of California, San Francisco, San Francisco, CA, United States.,Department of Medicine, University of California, San Francisco, San Francisco, CA, United States
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30
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Karasu E, Eisenhardt SU, Harant J, Huber-Lang M. Extracellular Vesicles: Packages Sent With Complement. Front Immunol 2018; 9:721. [PMID: 29696020 PMCID: PMC5904200 DOI: 10.3389/fimmu.2018.00721] [Citation(s) in RCA: 94] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 03/23/2018] [Indexed: 12/20/2022] Open
Abstract
Cells communicate with other cells in their microenvironment by transferring lipids, peptides, RNA, and sugars in extracellular vesicles (EVs), thereby also influencing recipient cell functions. Several studies indicate that these vesicles are involved in a variety of critical cellular processes including immune, metabolic, and coagulatory responses and are thereby associated with several inflammatory diseases. Furthermore, EVs also possess anti-inflammatory properties and contribute to immune regulation, thus encouraging an emerging interest in investigating and clarifying mechanistic links between EVs and innate immunity. Current studies indicate complex interactions of the complement system with EVs, with a dramatic influence on local and systemic inflammation. During inflammatory conditions with highly activated complement, including after severe tissue trauma and during sepsis, elevated numbers of EVs were found in the circulation of patients. There is increasing evidence that these shed vesicles contain key complement factors as well as complement regulators on their surface, affecting inflammation and the course of disease. Taken together, interaction of EVs regulates complement activity and contributes to the pro- and anti-inflammatory immune balance. However, the molecular mechanisms behind this interaction remain elusive and require further investigation. The aim of this review is to summarize the limited current knowledge on the crosstalk between complement and EVs. A further aspect is the clinical relevance of EVs with an emphasis on their capacity as potential therapeutic vehicles in the field of translational medicine.
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Affiliation(s)
- Ebru Karasu
- Institute of Clinical and Experimental Trauma-Immunology, Universitätsklinikum Ulm, Ulm, Germany
| | - Steffen U Eisenhardt
- Division of Reconstructive Microsurgery, Department of Plastic and Hand Surgery, University of Freiburg Faculty of Medicine, University of Freiburg Medical Centre, Freiburg, Germany
| | - Julia Harant
- Institute of Clinical and Experimental Trauma-Immunology, Universitätsklinikum Ulm, Ulm, Germany
| | - Markus Huber-Lang
- Institute of Clinical and Experimental Trauma-Immunology, Universitätsklinikum Ulm, Ulm, Germany
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31
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Coleman LG, Maile R, Jones SW, Cairns BA, Crews FT. HMGB1/IL-1β complexes in plasma microvesicles modulate immune responses to burn injury. PLoS One 2018; 13:e0195335. [PMID: 29601597 PMCID: PMC5877880 DOI: 10.1371/journal.pone.0195335] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 03/20/2018] [Indexed: 01/08/2023] Open
Abstract
Modulating immune responses to sepsis and trauma remain one of the most difficult challenges in modern medicine. Large burn injuries (LBI) are a severe form of trauma associated with sepsis, immune impairment, and mortality. Immune dysfunction after LBI is complex, involving both enhanced and impaired immune activation. The release of Damage-Associated Molecular Patterns (DAMPs), such as HMGB1, and cytokines (e.g. IL-1β) creates an environment of immune dysfunction often leading to end organ failure and death. Both HMGB1 and IL-1β have been found to play critical roles in sepsis and post-burn immune dysfunction. HMGB1 and IL-1β have been shown previously to form potent complexes in vitro. We recently identified the presence of HMGB1/IL-1β heterocomplexes in human tissue. We now find HMGB1/IL-1β complexes in human and mouse plasma, and identify a synergistic role of HMGB1/IL-1β complexes in post-burn immune dysfunction. In both humans and mice, we found that HMGB1 was enriched in plasma microvesicles (MVs) after LBI. HMGB1 was found form complexes with IL-1β. Using flow cytometry of mouse plasma MVs, we identified an increase in an HMGB1+/IL-1β+ MVs. Using co-IP, HMGB1 was found to bind the pro-form of IL-1β in mouse and human plasma. Pro-IL-1β, which is traditionally considered inactive, became active when complexed with HMGB1. Human THP-1 monocytes treated with HMGB1-pro-IL-1β complexes showed increased transcription of LBI associated cytokines IL-6 and IFNβ along with suppression of iNOS, mimicking findings associated with LBI. These findings identify that HMGB1/IL-1β complexes released after burn injuries can modulate immune responses, and microvesicles are identified as a novel reservoir for these immune mediators. These complexes might serve as novel immune targets for the treatment of systemic immune responses due to LBI or other causes of sepsis.
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Affiliation(s)
- Leon G Coleman
- Department of Pharmacology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America.,Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Robert Maile
- North Carolina Jaycee Burn Center, Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America.,Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Samuel W Jones
- North Carolina Jaycee Burn Center, Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Bruce A Cairns
- North Carolina Jaycee Burn Center, Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America.,Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Fulton T Crews
- Department of Pharmacology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America.,Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
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32
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Gong ZY, Yuan ZQ, Dong ZW, Peng YZ. Glutamine with probiotics attenuates intestinal inflammation and oxidative stress in a rat burn injury model through altered iNOS gene aberrant methylation. Am J Transl Res 2017; 9:2535-2547. [PMID: 28560003 PMCID: PMC5446535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Accepted: 05/01/2017] [Indexed: 06/07/2023]
Abstract
Severe burns may lead to intestinal inflammation and oxidative stress resulting in intestinal barrier damage and gut dysfunction. In the management of severe burns, therapies are needed to attenuate whole-body inflammatory responses and control the burden of oxidative stress. In this study, we evaluated the effects of oral glutamine (Gln) with probiotics on burn-induced intestinal inflammation and oxidative stress using a Wistar rat burn injury model. We then explored potential molecular mechanisms for the effects of glutamine and probiotics on intestinal tissue inflammation and oxidative stress. We found that glutamine and probiotics together significantly inhibited nitric oxide (NO) content; reduced levels of the inflammatory factors TNF-α, IL-6, and IL-8; and altered expression of oxidative stress factors including reactive oxygen species and superoxide dismutase. We found that the apoptotic proportion of intestinal epithelial cells in severely burned subjects was notably decreased following treatment with glutamine plus probiotics. We also found that glutamine and probiotics given together markedly reduced NO content by down-regulating the expression of iNOS in blood and intestinal tissue. These findings indicate that regulation of the iNOS gene plays a pivotal role in inflammation and oxidative stress in the response to severe burns in the Wistar rat. We then further investigated the mechanism by which combined therapy with glutamine and probiotics might reduce expression of iNOS and found that this treatment resulted in increased methylation of the iNOS gene. The methylation level of the iNOS gene was found to be regulated via differential expression of DNMT1 and Tet1. Collectively, our results suggest that combined therapy with glutamine and probiotics can markedly reduce the synthesis of NO, suppressing intestinal inflammation and oxidative stress in the Wistar rat burn injury model.
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Affiliation(s)
- Zhen-Yu Gong
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burn Research, Southwest Hospital, The Third Military Medical UniversityChongqing 400038, China
| | - Zhi-Qiang Yuan
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burn Research, Southwest Hospital, The Third Military Medical UniversityChongqing 400038, China
| | - Zhi-Wei Dong
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burn Research, Southwest Hospital, The Third Military Medical UniversityChongqing 400038, China
| | - Yi-Zhi Peng
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Burn Research, Southwest Hospital, The Third Military Medical UniversityChongqing 400038, China
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