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Isiaku AI, Zhang Z, Pazhakh V, Lieschke GJ. A nox2/cybb zebrafish mutant with defective myeloid cell reactive oxygen species production displays normal initial neutrophil recruitment to sterile tail injuries. G3 (BETHESDA, MD.) 2024; 14:jkae079. [PMID: 38696730 DOI: 10.1093/g3journal/jkae079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Accepted: 04/03/2024] [Indexed: 05/04/2024]
Abstract
Reactive oxygen species are important effectors and modifiers of the acute inflammatory response, recruiting phagocytes including neutrophils to sites of tissue injury. In turn, phagocytes such as neutrophils are both consumers and producers of reactive oxygen species. Phagocytes including neutrophils generate reactive oxygen species in an oxidative burst through the activity of a multimeric phagocytic nicotinamide adenine dinucleotide phosphate oxidase complex. Mutations in the NOX2/CYBB (previously gp91phox) nicotinamide adenine dinucleotide phosphate oxidase subunit are the commonest cause of chronic granulomatous disease, a disease characterized by infection susceptibility and an inflammatory phenotype. To model chronic granulomatous disease, we made a nox2/cybb zebrafish (Danio rerio) mutant and demonstrated it to have severely impaired myeloid cell reactive oxygen species production. Reduced early survival of nox2 mutant embryos indicated an essential requirement for nox2 during early development. In nox2/cybb zebrafish mutants, the dynamics of initial neutrophil recruitment to both mild and severe surgical tailfin wounds was normal, suggesting that excessive neutrophil recruitment at the initiation of inflammation is not the primary cause of the "sterile" inflammatory phenotype of chronic granulomatous disease patients. This nox2 zebrafish mutant adds to existing in vivo models for studying reactive oxygen species function in myeloid cells including neutrophils in development and disease.
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Affiliation(s)
- Abdulsalam I Isiaku
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC 3800, Australia
| | - Zuobing Zhang
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC 3800, Australia
| | - Vahid Pazhakh
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC 3800, Australia
| | - Graham J Lieschke
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC 3800, Australia
- Department of Clinical Haematology, Peter MacCallum Cancer Center and The Royal Melbourne Hospital, Parkville, VIC 3050, Australia
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2
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Zahn T, Schanze N, Staudacher DL, Wengenmayer T, Maier S, Benk C, Gauchel N, Duerschmied D, Supady A. The Effect of Cytokine Adsorption on Leukocyte and Platelet Activation after Extracorporeal Cardiopulmonary Resuscitation. Thromb Haemost 2024; 124:533-545. [PMID: 38081312 DOI: 10.1055/a-2225-5173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2024]
Abstract
BACKGROUND Post-cardiac arrest syndrome (PCAS) is a frequent complication following successful cardiopulmonary resuscitation and correlates with poor outcome. PCAS is characterized by an excessive inflammatory response to whole-body ischemia and reperfusion. Cytokine adsorption was suggested as an adjunctive treatment option for the removal of cytokines from the patients' blood to restore the physiological equilibrium of pro- and anti-inflammatory activity and thus mitigate hemodynamic instability and end-organ complications. MATERIAL AND METHODS To better understand the cellular effects of cytokine adsorption in patients receiving extracorporeal cardiopulmonary resuscitation (ECPR) after in- and out-of-hospital cardiac arrest, we compared the activation status of neutrophils, monocytes, and platelets as well as the formation of platelet-leukocyte complexes in intravenous whole blood samples from an exploratory subgroup (n = 24) from the randomized CYTER study. RESULT At 48 hours after initiation of ECPR, flow cytometry analyses did neither reveal significant differences in neutrophil (CD11b, CD66b, L-selectin, and PSGL-1) and monocyte (CD11b, L-selectin, and PSGL-1) surface molecule expression nor in circulating platelet-monocyte complexes between patients receiving cytokine adsorption and those without. CONCLUSION Data did not show a relevant effect of cytokine adsorption on neutrophil and monocyte activation during the first 48 hours after initiation of ECPR.
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Affiliation(s)
- Timm Zahn
- Interdisciplinary Medical Intensive Care, Faculty of Medicine, Medical Center, University of Freiburg, Freiburg, Germany
- Department of Cardiology and Angiology, Heart Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Nancy Schanze
- Department of Cardiology and Angiology, Heart Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Department of Cardiology, Angiology, Haemostaseology and Medical Intensive Care, University Medical Centre Mannheim, Medical Faculty Mannheim, Heidelberg University, Germany
| | - Dawid L Staudacher
- Interdisciplinary Medical Intensive Care, Faculty of Medicine, Medical Center, University of Freiburg, Freiburg, Germany
| | - Tobias Wengenmayer
- Interdisciplinary Medical Intensive Care, Faculty of Medicine, Medical Center, University of Freiburg, Freiburg, Germany
| | - Sven Maier
- Department of Cardiovascular Surgery, Heart Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Christoph Benk
- Department of Cardiovascular Surgery, Heart Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Nadine Gauchel
- Department of Cardiology and Angiology, Heart Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Daniel Duerschmied
- Department of Cardiology and Angiology, Heart Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Department of Cardiology, Angiology, Haemostaseology and Medical Intensive Care, University Medical Centre Mannheim, Medical Faculty Mannheim, Heidelberg University, Germany
| | - Alexander Supady
- Interdisciplinary Medical Intensive Care, Faculty of Medicine, Medical Center, University of Freiburg, Freiburg, Germany
- Heidelberg Institute of Global Health, University of Heidelberg, Heidelberg, Germany
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Degroote RL, Schmalen A, Hauck SM, Deeg CA. Unveiling Differential Responses of Granulocytes to Distinct Immunostimulants with Implications in Autoimmune Uveitis. Biomedicines 2023; 12:19. [PMID: 38275380 PMCID: PMC10812922 DOI: 10.3390/biomedicines12010019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 12/13/2023] [Accepted: 12/15/2023] [Indexed: 01/27/2024] Open
Abstract
The perception of circulating granulocytes as cells with a predetermined immune response mainly triggered by pathogens is evolving, recognizing their functional heterogeneity and adaptability, particularly within the neutrophil subset. The involvement of these cells in the pathophysiology of autoimmune uveitis has become increasingly clear, yet their exact role remains elusive. We used an equine model for autoimmune-mediated recurrent pan-uveitis to investigate early responses of granulocytes in different inflammatory environments. For this purpose, we performed differential proteomics on granulocytes from healthy and diseased horses stimulated with IL8, LPS, or PMA. Compared to healthy horses, granulocytes from the recurrent uveitis model significantly changed the cellular abundance of 384 proteins, with a considerable number of specific changes for each stimulant. To gain more insight into the functional impact of these stimulant-specific proteome changes in ERU pathogenesis, we used Ingenuity Pathway Analysis for pathway enrichment. This resulted in specific reaction patterns for each stimulant, with IL8 predominantly promoting Class I MHC-mediated antigen processing and presentation, LPS enhancing processes in phospholipid biosynthesis, and PMA, clearly inducing neutrophil degranulation. These findings shed light on the remarkably differentiated responses of neutrophils, offering valuable insights into their functional heterogeneity in a T-cell-driven disease. Raw data are available via ProteomeXchange with identifier PXD013648.
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Affiliation(s)
- Roxane L. Degroote
- Chair of Physiology, Department of Veterinary Sciences, LMU Munich, D-82152 Martinsried, Germany; (R.L.D.); (A.S.)
| | - Adrian Schmalen
- Chair of Physiology, Department of Veterinary Sciences, LMU Munich, D-82152 Martinsried, Germany; (R.L.D.); (A.S.)
- Metabolomics and Proteomics Core, Helmholtz Center Munich, German Research Center for Environmental Health, D-80939 Munich, Germany;
| | - Stefanie M. Hauck
- Metabolomics and Proteomics Core, Helmholtz Center Munich, German Research Center for Environmental Health, D-80939 Munich, Germany;
| | - Cornelia A. Deeg
- Chair of Physiology, Department of Veterinary Sciences, LMU Munich, D-82152 Martinsried, Germany; (R.L.D.); (A.S.)
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4
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Protoporphyrin IX derived from dual-species anaerobic biofilms of Fusobacterium necrophorum and Porphyromonas levii attenuates bovine neutrophil function. Biofilm 2022; 4:100095. [DOI: 10.1016/j.bioflm.2022.100095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 11/21/2022] [Accepted: 11/22/2022] [Indexed: 11/30/2022] Open
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Damascena HL, Silveira WAA, Castro MS, Fontes W. Neutrophil Activated by the Famous and Potent PMA (Phorbol Myristate Acetate). Cells 2022; 11:cells11182889. [PMID: 36139464 PMCID: PMC9496763 DOI: 10.3390/cells11182889] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 08/28/2022] [Accepted: 08/29/2022] [Indexed: 11/16/2022] Open
Abstract
This review will briefly outline the major signaling pathways in PMA-activated neutrophils. PMA is widely used to understand neutrophil pathways and formation of NETs. PMA activates PKC; however, we highlight some isoforms that contribute to specific functions. PKC α, β and δ contribute to ROS production while PKC βII and PKC ζ are involved in cytoskeleton remodeling. Actin polymerization is important for the chemotaxis of neutrophils and its remodeling is connected to ROS balance. We suggest that, although ROS and production of NETs are usually observed together in PMA-activated neutrophils, there might be a regulatory mechanism balancing both. Interestingly, we suggest that serine proteases might determine the PAD4 action. PAD4 could be responsible for the activation of the NF-κB pathway that leads to IL-1β release, triggering the cleavage of gasdermin D by serine proteases such as elastase, leading to pore formation contributing to release of NETs. On the other hand, when serine proteases are inhibited, NETs are formed by citrullination through the PAD4 pathway. This review puts together results from the last 31 years of research on the effects of PMA on the neutrophil and proposes new insights on their interpretation.
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Hoffmann ALC, Hauck SM, Deeg CA, Degroote RL. Pre-Activated Granulocytes from an Autoimmune Uveitis Model Show Divergent Pathway Activation Profiles upon IL8 Stimulation In Vitro. Int J Mol Sci 2022; 23:ijms23179555. [PMID: 36076947 PMCID: PMC9455241 DOI: 10.3390/ijms23179555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 08/17/2022] [Accepted: 08/18/2022] [Indexed: 11/25/2022] Open
Abstract
In the pathophysiology of autoimmune-mediated uveitis, granulocytes have emerged as possible disease mediators and were shown to be pre-activated in equine recurrent uveitis (ERU), a spontaneous disease model. We therefore used granulocytes from ERU horses to identify early molecular mechanisms involved in this dysregulated innate immune response. Primary granulocytes from healthy and ERU horses were stimulated with IL8, and cellular response was analyzed with differential proteomics, which revealed significant differences in protein abundance of 170 proteins in ERU. Subsequent ingenuity pathway analysis identified three activated canonical pathways “PKA signaling”, “PTEN signaling” and “leukocyte extravasation”. Clustered to the leukocyte extravasation pathway, we found the membrane-type GPI-anchored protease MMP25, which was increased in IL8 stimulated ERU granulocytes. These findings point to MMP25 as a possible regulator of granulocyte extravasation in uveitis and a role of this molecule in the impaired integrity of the blood-retina-barrier. In conclusion, our analyses show a clearly divergent reaction profile of pre-activated granulocytes upon IL8 stimulation and provide basic information for further in-depth studies on early granulocyte activation in non-infectious ocular diseases. This may be of interest for the development of new approaches in uveitis diagnostics and therapy. Raw data are available via ProteomeXchange with identifier PXD013648.
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Affiliation(s)
- Anne L. C. Hoffmann
- Chair of Physiology, Department of Veterinary Sciences, LMU Munich, D-82152 Martinsried, Germany
| | - Stefanie M. Hauck
- Research Unit Protein Science, Helmholtz Center Munich, German Research Center for Environmental Health, D-80939 Munich, Germany
| | - Cornelia A. Deeg
- Chair of Physiology, Department of Veterinary Sciences, LMU Munich, D-82152 Martinsried, Germany
| | - Roxane L. Degroote
- Chair of Physiology, Department of Veterinary Sciences, LMU Munich, D-82152 Martinsried, Germany
- Correspondence:
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Zhang L, Bao LJ, Hong ZD, Yan MX, Zhang ZH, Li YM, Ye Q, Wang YQ. Dysregulated Serum Cytokine Production in Pediatric Patients with β-Thalassemia Major. Hemoglobin 2022; 46:191-196. [PMID: 35549797 DOI: 10.1080/03630269.2022.2070499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
β-Thalassemia major (β-TM) is an inherited disorder of hemoglobin (Hb) production, which can cause severe anemia. A compromised immune system has been observed in patients with β-TM, whereas cytokines have a major role in immune modulation. Interleukin-4 (IL-4), IL-8, IL-13 and transforming growth factor-β (TGF-β) are critical in initiating pro-inflammatory responses, and the serum levels of those cytokines may be involved in the pathophysiology of β-thalassemia (β-thal). To assess this hypothesis, we studied 23 pediatric patients with β-TM by measuring serum levels of IL-4, IL-8, IL-13 and TGF-β, as well as evaluating infection frequency per year, total number of transfusions and serum ferritin (SF) levels, together with age-matched healthy controls. We found that patients with β-thal had higher IL-8, IL-13 and TGF-β concentrations than normal controls, whereas markedly decreased serum IL-4 level was documented in patients with β-TM. Serum IL-4 level of β-thal patients showed a negative significant correlation with infection frequency, total number of transfusions and SF levels. On the contrary, serum levels of IL-8, IL-13 and TGF-β exerted a positive relationship with those clinical parameters. Taken together, our study implies that dysregulated cytokine profile might contribute to iron overloads and impair immune cell functions, thus serving as useful biomarkers for diagnosis and evaluation of β-TM in the future. Our study sheds new light on the pathogenesis of β-TM.
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Affiliation(s)
- Li Zhang
- Department of Hematology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong Province, People's Republic of China
| | - Li-Juan Bao
- Department of Clinical Laboratory, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong Province, People's Republic of China
| | - Zheng-Dong Hong
- Department of Urology Surgery, the Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, People's Republic of China
| | - Mu-Xia Yan
- Department of Hematology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong Province, People's Republic of China
| | - Zhi-Hua Zhang
- Queen Mary School, Nanchang University, Nanchang, Jiangxi Province, People's Republic of China
| | - Yan-Mei Li
- Department of Hematology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong Province, People's Republic of China
| | - Qian Ye
- Department of Hematology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong Province, People's Republic of China
| | - Yi-Qian Wang
- Department of Biochemistry and Molecular Biology, GMU-GIBH Joint School of Life Sciences, Guangzhou Medical University, Guangzhou, Guangdong Province, People's Republic of China
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Shin JW, Kim J, Ham S, Choi SM, Lee CH, Lee JC, Kim JH, Cho SH, Kang HR, Kim YM, Chung DH, Chung Y, Bae YS, Bae YS, Roh TY, Kim T, Kim HY. A unique population of neutrophils generated by air pollutant-induced lung damage exacerbates airway inflammation. J Allergy Clin Immunol 2021; 149:1253-1269.e8. [PMID: 34653517 DOI: 10.1016/j.jaci.2021.09.031] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 08/26/2021] [Accepted: 09/02/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Diesel exhaust particles (DEPs) are the main component of traffic-related air pollution and have been implicated in the pathogenesis and exacerbation of asthma. However, the mechanism by which DEP exposure aggravates asthma symptoms remains unclear. OBJECTIVE This study aimed to identify a key cellular player of air pollutant-induced asthma exacerbation and development. METHODS We examined the distribution of innate immune cells in the murine models of asthma induced by house dust mite and DEP. Changes in immune cell profiles caused by DEP exposure were confirmed by flow cytometry and RNA-Seq analysis. The roles of sialic acid-binding, Ig-like lectin F (SiglecF)-positive neutrophils were further evaluated by adoptive transfer experiment and in vitro functional studies. RESULTS DEP exposure induced a unique population of lung granulocytes that coexpressed Ly6G and SiglecF. These cells differed phenotypically, morphologically, functionally, and transcriptionally from other SiglecF-expressing cells in the lungs. Our findings with murine models suggest that intratracheal challenge with DEPs induces the local release of adenosine triphosphate, which is a damage-associated molecular pattern signal. Adenosine triphosphate promotes the expression of SiglecF on neutrophils, and these SiglecF+ neutrophils worsen type 2 and 3 airway inflammation by producing high levels of cysteinyl leukotrienes and neutrophil extracellular traps. We also found Siglec8- (which corresponds to murine SiglecF) expressing neutrophils, and we found it in patients with asthma-chronic obstructive pulmonary disease overlap. CONCLUSION The SiglecF+ neutrophil is a novel and critical player in airway inflammation and targeting this population could reverse or ameliorate asthma.
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Affiliation(s)
- Jae Woo Shin
- Laboratory of Mucosal Immunology in Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Jihyun Kim
- Laboratory of Mucosal Immunology in Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Seokjin Ham
- Department of Life Sciences and Division of Integrative Biosciences & Biotechnology, Pohang University of Science & Technology (POSTECH), Pohang, Republic of Korea
| | - Sun Mi Choi
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - Chang-Hoon Lee
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - Jung Chan Lee
- Department of Biomedical Engineering, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Ji Hyung Kim
- College of Life Sciences and Biotechnology, Korea University, Seoul, Republic of Korea
| | - Sang-Heon Cho
- Division of Allergy and Clinical Immunology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea; Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Hye Ryun Kang
- Division of Allergy and Clinical Immunology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea; Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - You-Me Kim
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Doo Hyun Chung
- Department of Pathology, Seoul National University College of Medicine, Seoul, Republic of Korea; Laboratory of Immune Regulation in Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Yeonseok Chung
- Laboratory of Immune Regulation, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Yoe-Sik Bae
- Department of Biological Sciences, SRC Center for Immune Research on Non-lymphoid Organs, Sungkyunkwan University, Suwon, Republic of Korea; Department of Biological Sciences, Sungkyunkwan University, Suwon, Republic of Korea
| | - Yong-Soo Bae
- Department of Biological Sciences, SRC Center for Immune Research on Non-lymphoid Organs, Sungkyunkwan University, Suwon, Republic of Korea; Department of Biological Sciences, Sungkyunkwan University, Suwon, Republic of Korea
| | - Tae-Young Roh
- Department of Life Sciences and Division of Integrative Biosciences & Biotechnology, Pohang University of Science & Technology (POSTECH), Pohang, Republic of Korea; SysGenLab Inc, Pohang, Republic of Korea
| | - Taesoo Kim
- Department of Life Science, Ewha Womans University, Seoul, Republic of Korea
| | - Hye Young Kim
- Laboratory of Mucosal Immunology in Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Republic of Korea; Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul National University College of Medicine, Seoul, Republic of Korea.
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9
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Kaiser R, Leunig A, Pekayvaz K, Popp O, Joppich M, Polewka V, Escaig R, Anjum A, Hoffknecht ML, Gold C, Brambs S, Engel A, Stockhausen S, Knottenberg V, Titova A, Haji M, Scherer C, Muenchhoff M, Hellmuth JC, Saar K, Schubert B, Hilgendorff A, Schulz C, Kääb S, Zimmer R, Hübner N, Massberg S, Mertins P, Nicolai L, Stark K. Self-sustaining IL-8 loops drive a prothrombotic neutrophil phenotype in severe COVID-19. JCI Insight 2021; 6:e150862. [PMID: 34403366 PMCID: PMC8492337 DOI: 10.1172/jci.insight.150862] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 08/11/2021] [Indexed: 12/15/2022] Open
Abstract
Neutrophils provide a critical line of defense in immune responses to various pathogens, inflicting self-damage upon transition to a hyperactivated, procoagulant state. Recent work has highlighted proinflammatory neutrophil phenotypes contributing to lung injury and acute respiratory distress syndrome (ARDS) in patients with coronavirus disease 2019 (COVID-19). Here, we use state-of-the art mass spectrometry-based proteomics and transcriptomic and correlative analyses as well as functional in vitro and in vivo studies to dissect how neutrophils contribute to the progression to severe COVID-19. We identify a reinforcing loop of both systemic and neutrophil intrinsic IL-8 (CXCL8/IL-8) dysregulation, which initiates and perpetuates neutrophil-driven immunopathology. This positive feedback loop of systemic and neutrophil autocrine IL-8 production leads to an activated, prothrombotic neutrophil phenotype characterized by degranulation and neutrophil extracellular trap (NET) formation. In severe COVID-19, neutrophils directly initiate the coagulation and complement cascade, highlighting a link to the immunothrombotic state observed in these patients. Targeting the IL-8-CXCR-1/-2 axis interferes with this vicious cycle and attenuates neutrophil activation, degranulation, NETosis, and IL-8 release. Finally, we show that blocking IL-8-like signaling reduces severe acute respiratory distress syndrome of coronavirus 2 (SARS-CoV-2) spike protein-induced, human ACE2-dependent pulmonary microthrombosis in mice. In summary, our data provide comprehensive insights into the activation mechanisms of neutrophils in COVID-19 and uncover a self-sustaining neutrophil-IL-8 axis as a promising therapeutic target in severe SARS-CoV-2 infection.
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Affiliation(s)
- Rainer Kaiser
- Department of Medicine I, University Hospital, Ludwig-Maximilians University Munich, Germany
- German Centre for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, Munich, Germany
- COVID-19 Registry of the LMU Munich (CORKUM), University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
| | - Alexander Leunig
- Department of Medicine I, University Hospital, Ludwig-Maximilians University Munich, Germany
- German Centre for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, Munich, Germany
| | - Kami Pekayvaz
- Department of Medicine I, University Hospital, Ludwig-Maximilians University Munich, Germany
- German Centre for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, Munich, Germany
- COVID-19 Registry of the LMU Munich (CORKUM), University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
| | - Oliver Popp
- Max Delbrück Center for Molecular Medicine (MDC) in the Helmholtz Association, Berlin, Germany
- DZHK, partner site Berlin, Berlin, Germany
| | - Markus Joppich
- Department of Informatics, Ludwig-Maximilians University Munich, Munich, Germany
| | - Vivien Polewka
- Department of Medicine I, University Hospital, Ludwig-Maximilians University Munich, Germany
| | - Raphael Escaig
- Department of Medicine I, University Hospital, Ludwig-Maximilians University Munich, Germany
| | - Afra Anjum
- Department of Medicine I, University Hospital, Ludwig-Maximilians University Munich, Germany
| | - Marie-Louise Hoffknecht
- Department of Medicine I, University Hospital, Ludwig-Maximilians University Munich, Germany
| | - Christoph Gold
- Department of Medicine I, University Hospital, Ludwig-Maximilians University Munich, Germany
| | - Sophia Brambs
- Department of Medicine I, University Hospital, Ludwig-Maximilians University Munich, Germany
| | - Anouk Engel
- Department of Medicine I, University Hospital, Ludwig-Maximilians University Munich, Germany
| | - Sven Stockhausen
- Department of Medicine I, University Hospital, Ludwig-Maximilians University Munich, Germany
- German Centre for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, Munich, Germany
| | - Viktoria Knottenberg
- Department of Medicine I, University Hospital, Ludwig-Maximilians University Munich, Germany
| | - Anna Titova
- Department of Medicine I, University Hospital, Ludwig-Maximilians University Munich, Germany
| | - Mohamed Haji
- Max Delbrück Center for Molecular Medicine (MDC) in the Helmholtz Association, Berlin, Germany
- DZHK, partner site Berlin, Berlin, Germany
| | - Clemens Scherer
- Department of Medicine I, University Hospital, Ludwig-Maximilians University Munich, Germany
- German Centre for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, Munich, Germany
- COVID-19 Registry of the LMU Munich (CORKUM), University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
| | - Maximilian Muenchhoff
- COVID-19 Registry of the LMU Munich (CORKUM), University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
- Max von Pettenkofer Institute and GeneCenter, Virology, Faculty of Medicine, Ludwig-Maximilians University, Munich, Germany
- German Center for Infection Research, Partner Site Munich, Munich, Germany
| | - Johannes C. Hellmuth
- COVID-19 Registry of the LMU Munich (CORKUM), University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
- Medical Clinic and Polyclinic III, University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
| | - Kathrin Saar
- Max Delbrück Center for Molecular Medicine (MDC) in the Helmholtz Association, Berlin, Germany
- DZHK, partner site Berlin, Berlin, Germany
| | - Benjamin Schubert
- Institute of Computational Biology, Helmholtz Zentrum München (German Research Center for Environmental Health), Neuherberg, Germany
- Department of Mathematics, Technical University of Munich, Garching, Germany
- The COMBAT C19IR study group is detailed in the Acknowledgments
| | - Anne Hilgendorff
- The COMBAT C19IR study group is detailed in the Acknowledgments
- Institute for Lung Biology and Disease and Comprehensive Pneumology Center with the CPC-M bioArchive, Helmholtz Center Munich, Member of the German Center for Lung Research, Munich, Germany
- Center for Comprehensive Developmental Care at the interdisciplinary Social Pediatric Center, Haunersches Children’s Hospital, University Hospital Ludwig-Maximilian University, Munich, Germany
| | - Christian Schulz
- Department of Medicine I, University Hospital, Ludwig-Maximilians University Munich, Germany
- German Centre for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, Munich, Germany
| | - Stefan Kääb
- Department of Medicine I, University Hospital, Ludwig-Maximilians University Munich, Germany
- German Centre for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, Munich, Germany
- COVID-19 Registry of the LMU Munich (CORKUM), University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
| | - Ralf Zimmer
- Department of Informatics, Ludwig-Maximilians University Munich, Munich, Germany
| | - Norbert Hübner
- Max Delbrück Center for Molecular Medicine (MDC) in the Helmholtz Association, Berlin, Germany
- DZHK, partner site Berlin, Berlin, Germany
- Charité-Universitätsmedizin Berlin, Germany
| | - Steffen Massberg
- Department of Medicine I, University Hospital, Ludwig-Maximilians University Munich, Germany
- German Centre for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, Munich, Germany
- COVID-19 Registry of the LMU Munich (CORKUM), University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
| | - Philipp Mertins
- Max Delbrück Center for Molecular Medicine (MDC) in the Helmholtz Association, Berlin, Germany
- DZHK, partner site Berlin, Berlin, Germany
| | - Leo Nicolai
- Department of Medicine I, University Hospital, Ludwig-Maximilians University Munich, Germany
- German Centre for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, Munich, Germany
- COVID-19 Registry of the LMU Munich (CORKUM), University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
| | - Konstantin Stark
- Department of Medicine I, University Hospital, Ludwig-Maximilians University Munich, Germany
- German Centre for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, Munich, Germany
- COVID-19 Registry of the LMU Munich (CORKUM), University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
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10
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Fetz AE, Wallace SE, Bowlin GL. Electrospun Polydioxanone Loaded With Chloroquine Modulates Template-Induced NET Release and Inflammatory Responses From Human Neutrophils. Front Bioeng Biotechnol 2021; 9:652055. [PMID: 33987174 PMCID: PMC8111017 DOI: 10.3389/fbioe.2021.652055] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 03/19/2021] [Indexed: 12/11/2022] Open
Abstract
The implantation of a biomaterial quickly initiates a tissue repair program initially characterized by a neutrophil influx. During the acute inflammatory response, neutrophils release neutrophil extracellular traps (NETs) and secrete soluble signals to modulate the tissue environment. In this work, we evaluated chloroquine diphosphate, an antimalarial with immunomodulatory and antithrombotic effects, as an electrospun biomaterial additive to regulate neutrophil-mediated inflammation. Electrospinning of polydioxanone was optimized for rapid chloroquine elution within 1 h, and acute neutrophil-biomaterial interactions were evaluated in vitro with fresh human peripheral blood neutrophils at 3 and 6 h before quantifying the release of NETs and secretion of inflammatory and regenerative factors. Our results indicate that chloroquine suppresses NET release in a biomaterial surface area–dependent manner at the early time point, whereas it modulates signal secretion at both early and late time points. More specifically, chloroquine elution down-regulates interleukin 8 (IL-8) and matrix metalloproteinase nine secretion while up-regulating hepatocyte growth factor, vascular endothelial growth factor A, and IL-22 secretion, suggesting a potential shift toward a resolving neutrophil phenotype. Our novel repurposing of chloroquine as a biomaterial additive may therefore have synergistic, immunomodulatory effects that are advantageous for biomaterial-guided in situ tissue regeneration applications.
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Affiliation(s)
- Allison E Fetz
- Department of Biomedical Engineering, University of Memphis, Memphis, TN, United States
| | - Shannon E Wallace
- Department of Biomedical Engineering, University of Memphis, Memphis, TN, United States
| | - Gary L Bowlin
- Department of Biomedical Engineering, University of Memphis, Memphis, TN, United States
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11
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Lorenz L, Amann B, Hirmer S, Degroote RL, Hauck SM, Deeg CA. NEU1 is more abundant in uveitic retina with concomitant desialylation of retinal cells. Glycobiology 2021; 31:873-883. [PMID: 33677598 DOI: 10.1093/glycob/cwab014] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 02/05/2021] [Accepted: 02/05/2021] [Indexed: 12/16/2022] Open
Abstract
Desialylation of cell surface glycoproteins carried out by sialidases affects various immunological processes. However, the role of neuraminidase 1 (NEU1), one of four mammalian sialidases, in inflammation and autoimmune disease is not completely unraveled to date. In this study, we analyzed retinal expression of NEU1 in equine recurrent uveitis (ERU), a spontaneous animal model for autoimmune uveitis. Mass spectrometry revealed significantly higher abundance of NEU1 in retinal Müller glial cells (RMG) of ERU-diseased horses compared to healthy controls. Immunohistochemistry uncovered NEU1 expression along the whole Müller cell body in healthy and uveitic state and confirmed higher abundance in inflamed retina. Müller glial cells are the principal macroglial cells of the retina and play a crucial role in uveitis pathogenesis. To determine whether higher expression levels of NEU1 in uveitic RMG correlate with desialylation of retinal cells, we performed lectin binding assays with sialic acid-specific lectins. Through these experiments we could demonstrate a profound loss of both α2-3- and α2-6-linked terminal sialic acids in uveitis. Hence, we hypothesize that higher abundance of NEU1 in uveitic RMG plays an important role in the pathogenesis of uveitis by desialylation of retinal cells. As RMG become activated in the course of uveitis and actively promote inflammation, we propose that NEU1 might represent a novel activation marker for inflammatory RMG. Our data provide novel insights in the expression and implication of NEU1 in inflammation and autoimmune disease.
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Affiliation(s)
- Lea Lorenz
- Chair of Physiology, Department of Veterinary Sciences, LMU Munich, 82152 Martinsried, Germany
| | - Barbara Amann
- Chair of Physiology, Department of Veterinary Sciences, LMU Munich, 82152 Martinsried, Germany
| | - Sieglinde Hirmer
- Chair of Physiology, Department of Veterinary Sciences, LMU Munich, 82152 Martinsried, Germany
| | - Roxane L Degroote
- Chair of Physiology, Department of Veterinary Sciences, LMU Munich, 82152 Martinsried, Germany
| | - Stefanie M Hauck
- Research Unit Protein Science, Helmholtz Center Munich, German Research Center for Environmental Health (GmbH), 80939 Munich, Germany
| | - Cornelia A Deeg
- Chair of Physiology, Department of Veterinary Sciences, LMU Munich, 82152 Martinsried, Germany
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12
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Degroote RL, Deeg CA. Immunological Insights in Equine Recurrent Uveitis. Front Immunol 2021; 11:609855. [PMID: 33488614 PMCID: PMC7821741 DOI: 10.3389/fimmu.2020.609855] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 11/30/2020] [Indexed: 12/05/2022] Open
Abstract
Horses worldwide suffer from equine recurrent uveitis (ERU), an organ-specific, immune-mediated disease with painful, remitting-relapsing inflammatory attacks alternating with periods of quiescence, which ultimately leads to blindness. In course of disease, both eyes can eventually be affected and since blind horses pose a threat to themselves and their surroundings, these animals have to be killed. Therefore, this disease is highly relevant for veterinary medicine. Additionally, ERU shows strong clinical and pathological resemblance to autoimmune uveitis in man. The exact cause for the onset of ERU is unclear to date. T cells are believed to be the main effector cells in this disease, as they overcome the blood retinal barrier to invade the eye, an organ physiologically devoid of peripheral immune cells. These cells cause severe intraocular inflammation, especially in their primary target, the retina. With every inflammatory episode, retinal degeneration increases until eyesight is completely lost. In ERU, T cells show an activated phenotype, with enhanced deformability and migration ability, which is reflected in the composition of their proteome and downstream interaction pathways even in quiescent stage of disease. Besides the dysregulation of adaptive immune cells, emerging evidence suggests that cells of the innate immune system may also directly contribute to ERU pathogenesis. As investigations in both the target organ and the periphery have rapidly evolved in recent years, giving new insights on pathogenesis-associated processes on cellular and molecular level, this review summarizes latest developments in ERU research.
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Affiliation(s)
- Roxane L Degroote
- Chair of Physiology, Department of Veterinary Sciences, LMU Munich, Munich, Germany
| | - Cornelia A Deeg
- Chair of Physiology, Department of Veterinary Sciences, LMU Munich, Munich, Germany
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13
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Deviant proteome profile of equine granulocytes associates to latent activation status in organ specific autoimmune disease. J Proteomics 2020; 230:103989. [PMID: 32977044 DOI: 10.1016/j.jprot.2020.103989] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 08/26/2020] [Accepted: 09/14/2020] [Indexed: 02/06/2023]
Abstract
Equine recurrent uveitis (ERU) is a spontaneous, remitting-relapsing autoimmune disease driven by the adaptive immune system. Although T cells are described as the main effector cells in pathogenesis, granulocytes have also emerged as possible disease mediators. To explore the role of these innate immune cells, we investigated the whole cell proteome of granulocytes from equine recurrent uveitis cases and healthy controls. Among the 2362 proteins identified by mass spectrometry, we found 96 proteins with significantly changed abundance between groups (p < 0.05, fold change >1.2), representing 4.1% of total granulocyte proteome. Within these differential identifications, calgranulin B, a protein associated with pathogenesis in other autoimmune diseases, showed highest abundance in equine recurrent uveitis (18 fold). For a better interpretation of the results from our hypothesis-generating approach, we added a threshold for biological significance (ratio ERU/controls >2: 36 proteins) to the proteins with increased abundance in equine recurrent uveitis and analyzed their allocation to the subsets within the Immune System superpathway. The 36 differentially abundant proteins predominantly associated to RAF/MAP kinase cascade, MHC-I-mediated antigen presentation and neutrophil degranulation, suggesting a latently activated phenotype of these innate immune cells in disease. Raw data are available via ProteomeXchange with identifier PXD013648. SIGNIFICANCE: Our study provides new insights into the protein repertoire of primary equine granulocytes and identifies protein abundance changes associated to equine recurrent uveitis (ERU), an organ specific, spontaneously occurring autoimmune disease. We show that granulocyte proteins with increased abundance in ERU strongly associate to RAF/MAP kinase signaling, MHC-I antigen presentation and neutrophil degranulation, pointing to a more activated state of these cells in ERU cases. Since cells were obtained in quiescent stage of disease, latent activation of granulocytes underlines the role of these innate immune cells in ERU. These findings are highly relevant for veterinary medicine, further establishing the importance of granulocytes in this T cell-driven autoimmune disease. Moreover, they have translational quality for autoimmune uveitis in man, due to strong similarity in disease occurrence, progression and pathogenesis.
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