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Subramanian P, Gargani S, Palladini A, Chatzimike M, Grzybek M, Peitzsch M, Papanastasiou AD, Pyrina I, Ntafis V, Gercken B, Lesche M, Petzold A, Sinha A, Nati M, Thangapandi VR, Kourtzelis I, Andreadou M, Witt A, Dahl A, Burkhardt R, Haase R, Domingues AMDJ, Henry I, Zamboni N, Mirtschink P, Chung KJ, Hampe J, Coskun Ü, Kontoyiannis DL, Chavakis T. The RNA binding protein human antigen R is a gatekeeper of liver homeostasis. Hepatology 2022; 75:881-897. [PMID: 34519101 DOI: 10.1002/hep.32153] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 09/08/2021] [Accepted: 09/10/2021] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND AIMS NAFLD is initiated by steatosis and can progress through fibrosis and cirrhosis to HCC. The RNA binding protein human antigen R (HuR) controls RNAs at the posttranscriptional level; hepatocyte HuR has been implicated in the regulation of diet-induced hepatic steatosis. The present study aimed to understand the role of hepatocyte HuR in NAFLD development and progression to fibrosis and HCC. APPROACH AND RESULTS Hepatocyte-specific, HuR-deficient mice and control HuR-sufficient mice were fed either a normal diet or an NAFLD-inducing diet. Hepatic lipid accumulation, inflammation, fibrosis, and HCC development were studied by histology, flow cytometry, quantitative PCR, and RNA sequencing. The liver lipidome was characterized by lipidomics analysis, and the HuR-RNA interactions in the liver were mapped by RNA immunoprecipitation sequencing. Hepatocyte-specific, HuR-deficient mice displayed spontaneous hepatic steatosis and fibrosis predisposition compared to control HuR-sufficient mice. On an NAFLD-inducing diet, hepatocyte-specific HuR deficiency resulted in exacerbated inflammation, fibrosis, and HCC-like tumor development. A multi-omic approach, including lipidomics, transcriptomics, and RNA immunoprecipitation sequencing revealed that HuR orchestrates a protective network of hepatic-metabolic and lipid homeostasis-maintaining pathways. Consistently, HuR-deficient livers accumulated, already at steady state, a triglyceride signature resembling that of NAFLD livers. Moreover, up-regulation of secreted phosphoprotein 1 expression mediated, at least partially, fibrosis development in hepatocyte-specific HuR deficiency on an NAFLD-inducing diet, as shown by experiments using antibody blockade of osteopontin. CONCLUSIONS HuR is a gatekeeper of liver homeostasis, preventing NAFLD-related fibrosis and HCC, suggesting that the HuR-dependent network could be exploited therapeutically.
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Affiliation(s)
- Pallavi Subramanian
- Institute for Clinical Chemistry and Laboratory MedicineFaculty of MedicineTechnische Universität DresdenDresdenGermany
| | - Sofia Gargani
- Institute for Fundamental Biomedical Research (IFBR), Biomedical Sciences Research Centre "Alexander Fleming"VariGreece
| | - Alessandra Palladini
- Paul Langerhans Institute Dresden, Helmholtz Zentrum München, University Hospital and Faculty of MedicineTechnische Universität DresdenDresdenGermany.,German Center for Diabetes ResearchNeuherbergGermany
| | - Margarita Chatzimike
- Institute for Fundamental Biomedical Research (IFBR), Biomedical Sciences Research Centre "Alexander Fleming"VariGreece
| | - Michal Grzybek
- Paul Langerhans Institute Dresden, Helmholtz Zentrum München, University Hospital and Faculty of MedicineTechnische Universität DresdenDresdenGermany.,German Center for Diabetes ResearchNeuherbergGermany
| | - Mirko Peitzsch
- Institute for Clinical Chemistry and Laboratory MedicineFaculty of MedicineTechnische Universität DresdenDresdenGermany
| | - Anastasios D Papanastasiou
- Department of Biomedical SciencesUniversity of West AtticaAthensGreece.,Histopathology UnitBiomedical Sciences Research Center "Alexander Fleming"VariGreece
| | - Iryna Pyrina
- Institute for Clinical Chemistry and Laboratory MedicineFaculty of MedicineTechnische Universität DresdenDresdenGermany
| | - Vasileios Ntafis
- Institute for Fundamental Biomedical Research (IFBR), Biomedical Sciences Research Centre "Alexander Fleming"VariGreece
| | - Bettina Gercken
- Institute for Clinical Chemistry and Laboratory MedicineFaculty of MedicineTechnische Universität DresdenDresdenGermany
| | - Mathias Lesche
- DRESDEN-concept Genome CenterCenter for Molecular and Cellular BioengineeringTechnische Universität DresdenDresdenGermany
| | - Andreas Petzold
- DRESDEN-concept Genome CenterCenter for Molecular and Cellular BioengineeringTechnische Universität DresdenDresdenGermany
| | - Anupam Sinha
- Institute for Clinical Chemistry and Laboratory MedicineFaculty of MedicineTechnische Universität DresdenDresdenGermany
| | - Marina Nati
- Institute for Clinical Chemistry and Laboratory MedicineFaculty of MedicineTechnische Universität DresdenDresdenGermany
| | - Veera Raghavan Thangapandi
- Department of Internal Medicine IUniversity Hospital and Faculty of Medicine, Technische Universität DresdenDresdenGermany
| | - Ioannis Kourtzelis
- Institute for Clinical Chemistry and Laboratory MedicineFaculty of MedicineTechnische Universität DresdenDresdenGermany.,National Center for Tumor DiseasesPartner Site Dresden, Dresden and German Cancer Research CenterHeidelbergGermany.,York Biomedical Research Institute, Hull York Medical SchoolUniversity of YorkYorkUK
| | - Margarita Andreadou
- Institute for Fundamental Biomedical Research (IFBR), Biomedical Sciences Research Centre "Alexander Fleming"VariGreece
| | - Anke Witt
- Institute for Clinical Chemistry and Laboratory MedicineFaculty of MedicineTechnische Universität DresdenDresdenGermany
| | - Andreas Dahl
- DRESDEN-concept Genome CenterCenter for Molecular and Cellular BioengineeringTechnische Universität DresdenDresdenGermany
| | - Ralph Burkhardt
- Institute of Clinical Chemistry and Laboratory MedicineUniversity Hospital RegensburgRegensburgGermany
| | - Robert Haase
- Scientific Computing FacilityMax Planck Institute of Molecular Cell Biology and GeneticsDresdenGermany
| | | | - Ian Henry
- Scientific Computing FacilityMax Planck Institute of Molecular Cell Biology and GeneticsDresdenGermany
| | - Nicola Zamboni
- Institute of Molecular Systems BiologyETH ZurichZurichSwitzerland
| | - Peter Mirtschink
- Institute for Clinical Chemistry and Laboratory MedicineFaculty of MedicineTechnische Universität DresdenDresdenGermany
| | - Kyoung-Jin Chung
- Institute for Clinical Chemistry and Laboratory MedicineFaculty of MedicineTechnische Universität DresdenDresdenGermany
| | - Jochen Hampe
- Department of Internal Medicine IUniversity Hospital and Faculty of Medicine, Technische Universität DresdenDresdenGermany
| | - Ünal Coskun
- Paul Langerhans Institute Dresden, Helmholtz Zentrum München, University Hospital and Faculty of MedicineTechnische Universität DresdenDresdenGermany.,German Center for Diabetes ResearchNeuherbergGermany
| | - Dimitris L Kontoyiannis
- Institute for Fundamental Biomedical Research (IFBR), Biomedical Sciences Research Centre "Alexander Fleming"VariGreece.,Department of Genetics, Development & Molecular Biology, School of BiologyAristotle University of ThessalonikiThessalonikiGreece
| | - Triantafyllos Chavakis
- Institute for Clinical Chemistry and Laboratory MedicineFaculty of MedicineTechnische Universität DresdenDresdenGermany.,Paul Langerhans Institute Dresden, Helmholtz Zentrum München, University Hospital and Faculty of MedicineTechnische Universität DresdenDresdenGermany.,German Center for Diabetes ResearchNeuherbergGermany.,National Center for Tumor DiseasesPartner Site Dresden, Dresden and German Cancer Research CenterHeidelbergGermany
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2
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Failer T, Amponsah-Offeh M, Neuwirth A, Kourtzelis I, Subramanian P, Mirtschink P, Peitzsch M, Matschke K, Tugtekin SM, Kajikawa T, Li X, Steglich A, Gembardt F, Wegner AC, Hugo C, Hajishengallis G, Chavakis T, Deussen A, Todorov V, Kopaliani I. Developmental endothelial locus-1 protects from hypertension-induced cardiovascular remodeling via immunomodulation. J Clin Invest 2022; 132:126155. [PMID: 35133978 PMCID: PMC8920341 DOI: 10.1172/jci126155] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Accepted: 02/02/2022] [Indexed: 11/25/2022] Open
Abstract
The causative role of inflammation in hypertension-related cardiovascular diseases is evident and calls for development of specific immunomodulatory therapies. We tested the therapeutic efficacy and mechanisms of action of developmental endothelial locus-1 (DEL-1), an endogenous antiinflammatory factor, in angiotensin II– (ANGII–) and deoxycorticosterone acetate–salt–induced (DOCA-salt–induced) cardiovascular organ damage and hypertension. By using mice with endothelial overexpression of DEL-1 (EC-Del1 mice) and performing preventive and interventional studies by injecting recombinant DEL-1 in mice, we showed that DEL-1 improved endothelial function and abrogated aortic adventitial fibrosis, medial thickening, and loss of elastin. DEL-1 also protected the mice from cardiac concentric hypertrophy and interstitial and perivascular coronary fibrosis and improved left ventricular function and myocardial coronary perfusion. DEL-1 prevented aortic stiffness and abolished the progression of hypertension. Mechanistically, DEL-1 acted by inhibiting αvβ3 integrin–dependent activation of pro-MMP2 in mice and in human isolated aorta. Moreover, DEL-1 stabilized αvβ3 integrin–dependent CD25+FoxP3+ Treg numbers and IL-10 levels, which were associated with decreased recruitment of inflammatory cells and reduced production of proinflammatory cytokines in cardiovascular organs. The demonstrated effects and immune-modulating mechanisms of DEL-1 in abrogation of cardiovascular remodeling and progression of hypertension identify DEL-1 as a potential therapeutic factor.
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Affiliation(s)
- Theresa Failer
- Department of Physiology, Technische Universität Dresden, Dresden, Germany
| | | | - Aleš Neuwirth
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - Ioannis Kourtzelis
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - Pallavi Subramanian
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - Peter Mirtschink
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - Mirko Peitzsch
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - Klaus Matschke
- Department of Cardiac Surgery, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Sems M Tugtekin
- Department of Cardiac Surgery, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Tetsuhiro Kajikawa
- Department of Basic and Translational Sciences, University of Pennsylvania, Philadelphia, United States of America
| | - Xiaofei Li
- Department of Basic and Translational Sciences, University of Pennsylvania, Philadelphia, United States of America
| | - Anne Steglich
- Department of Internal Medicine III, Technische Universität Dresden, Dresden, Germany
| | - Florian Gembardt
- Department of Internal Medicine III, Technische Universität Dresden, Dresden, Germany
| | - Annika C Wegner
- Department of Internal Medicine III, Technische Universität Dresden, Dresden, Germany
| | - Christian Hugo
- Department of Internal Medicine III, Technische Universität Dresden, Dresden, Germany
| | - George Hajishengallis
- Department of Basic and Translational Sciences, University of Pennsylvania, Philadelphia, United States of America
| | | | - Andreas Deussen
- Department of Physiology, Technische Universität Dresden, Dresden, Germany
| | - Vladimir Todorov
- Department of Internal Medicine III, Technische Universität Dresden, Dresden, Germany
| | - Irakli Kopaliani
- Department of Physiology, Technische Universität Dresden, Dresden, Germany
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3
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Kourtzelis I, Hewitson J, Roger T. Editorial: Macrophage Plasticity in Sterile and Pathogen-Induced Inflammation. Front Immunol 2021; 12:823023. [PMID: 34975930 PMCID: PMC8718448 DOI: 10.3389/fimmu.2021.823023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 12/02/2021] [Indexed: 11/13/2022] Open
Affiliation(s)
- Ioannis Kourtzelis
- Hull York Medical School, York Biomedical Research Institute, University of York, York, United Kingdom
- *Correspondence: Ioannis Kourtzelis,
| | - James Hewitson
- Department of Biology, York Biomedical Research Institute, University of York, York, United Kingdom
| | - Thierry Roger
- Infectious Diseases Service, Department of Medicine, Lausanne University Hospital and University of Lausanne, Epalinges, Switzerland
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4
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Wang H, Li X, Kajikawa T, Shin J, Lim JH, Kourtzelis I, Nagai K, Korostoff JM, Grossklaus S, Naumann R, Chavakis T, Hajishengallis G. Stromal cell-derived DEL-1 inhibits Tfh cell activation and inflammatory arthritis. J Clin Invest 2021; 131:e150578. [PMID: 34403362 PMCID: PMC8483759 DOI: 10.1172/jci150578] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 08/12/2021] [Indexed: 11/17/2022] Open
Abstract
The secreted protein developmental endothelial locus 1 (DEL-1) regulates inflammatory cell recruitment and protects against inflammatory pathologies in animal models. Here, we investigated DEL-1 in inflammatory arthritis using collagen-induced arthritis (CIA) and collagen Ab-induced arthritis (CAIA) models. In both models, mice with endothelium-specific overexpression of DEL-1 were protected from arthritis relative to WT controls, whereas arthritis was exacerbated in DEL-1-deficient mice. Compared with WT controls, mice with collagen VI promoter-driven overexpression of DEL-1 in mesenchymal cells were protected against CIA but not CAIA, suggesting a role for DEL-1 in the induction of the arthritogenic Ab response. Indeed, DEL-1 was expressed in perivascular stromal cells of the lymph nodes and inhibited Tfh and germinal center B cell responses. Mechanistically, DEL-1 inhibited DC-dependent induction of Tfh cells by targeting the LFA-1 integrin on T cells. Overall, DEL-1 restrained arthritis through a dual mechanism, one acting locally in the joints and associated with the anti-recruitment function of endothelial cell-derived DEL-1; the other mechanism acting systemically in the lymph nodes and associated with the ability of stromal cell-derived DEL-1 to restrain Tfh responses. DEL-1 may therefore be a promising therapeutic for the treatment of inflammatory arthritis.
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Affiliation(s)
- Hui Wang
- Department of Basic and Translational Sciences, Penn Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Xiaofei Li
- Department of Basic and Translational Sciences, Penn Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Tetsuhiro Kajikawa
- Department of Basic and Translational Sciences, Penn Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Jieun Shin
- Department of Basic and Translational Sciences, Penn Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Jong-Hyung Lim
- Department of Basic and Translational Sciences, Penn Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Ioannis Kourtzelis
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
- Hull York Medical School, York Biomedical Research Institute, University of York, York, United Kingdom
| | - Kosuke Nagai
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Jonathan M. Korostoff
- Department of Periodontics, Penn Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Sylvia Grossklaus
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Ronald Naumann
- Transgenic Core Facility, Max Planck Institute for Molecular Cell Biology and Genetics, Dresden, Germany
| | - Triantafyllos Chavakis
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
- Centre for Cardiovascular Science, Queen’s Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - George Hajishengallis
- Department of Basic and Translational Sciences, Penn Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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5
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Kalafati L, Kourtzelis I, Schulte-Schrepping J, Li X, Hatzioannou A, Grinenko T, Hagag E, Sinha A, Has C, Dietz S, de Jesus Domingues AM, Nati M, Sormendi S, Neuwirth A, Chatzigeorgiou A, Ziogas A, Lesche M, Dahl A, Henry I, Subramanian P, Wielockx B, Murray P, Mirtschink P, Chung KJ, Schultze JL, Netea MG, Hajishengallis G, Verginis P, Mitroulis I, Chavakis T. Innate Immune Training of Granulopoiesis Promotes Anti-tumor Activity. Cell 2021; 183:771-785.e12. [PMID: 33125892 PMCID: PMC7599076 DOI: 10.1016/j.cell.2020.09.058] [Citation(s) in RCA: 239] [Impact Index Per Article: 79.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 06/19/2020] [Accepted: 09/23/2020] [Indexed: 01/05/2023]
Abstract
Trained innate immunity, induced via modulation of mature myeloid cells or their bone marrow progenitors, mediates sustained increased responsiveness to secondary challenges. Here, we investigated whether anti-tumor immunity can be enhanced through induction of trained immunity. Pre-treatment of mice with β-glucan, a fungal-derived prototypical agonist of trained immunity, resulted in diminished tumor growth. The anti-tumor effect of β-glucan-induced trained immunity was associated with transcriptomic and epigenetic rewiring of granulopoiesis and neutrophil reprogramming toward an anti-tumor phenotype; this process required type I interferon signaling irrespective of adaptive immunity in the host. Adoptive transfer of neutrophils from β-glucan-trained mice to naive recipients suppressed tumor growth in the latter in a ROS-dependent manner. Moreover, the anti-tumor effect of β-glucan-induced trained granulopoiesis was transmissible by bone marrow transplantation to recipient naive mice. Our findings identify a novel and therapeutically relevant anti-tumor facet of trained immunity involving appropriate rewiring of granulopoiesis.
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Affiliation(s)
- Lydia Kalafati
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, 01307 Dresden, Germany; National Center for Tumor Diseases, Partner Site Dresden, 01307 Dresden and German Cancer Research Center, Heidelberg, 69120 Heidelberg, Germany
| | - Ioannis Kourtzelis
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, 01307 Dresden, Germany; National Center for Tumor Diseases, Partner Site Dresden, 01307 Dresden and German Cancer Research Center, Heidelberg, 69120 Heidelberg, Germany; Hull York Medical School, York Biomedical Research Institute, University of York, York, YO10 5DD, UK.
| | - Jonas Schulte-Schrepping
- Department of Genomics and Immunoregulation, Life and Medical Science Institute, University of Bonn, 53115 Bonn, Germany
| | - Xiaofei Li
- Department of Basic and Translational Sciences, Penn Dental Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Aikaterini Hatzioannou
- Laboratory of Immune Regulation and Tolerance, Autoimmunity and Inflammation, Biomedical Research Foundation of the Academy of Athens, 11527 Athens, Greece
| | - Tatyana Grinenko
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, 01307 Dresden, Germany
| | - Eman Hagag
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, 01307 Dresden, Germany
| | - Anupam Sinha
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, 01307 Dresden, Germany; National Center for Tumor Diseases, Partner Site Dresden, 01307 Dresden and German Cancer Research Center, Heidelberg, 69120 Heidelberg, Germany
| | - Canan Has
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, 01307 Dresden, Germany
| | - Sevina Dietz
- DFG-Center for Regenerative Therapies Dresden, 01307 Dresden, Germany
| | | | - Marina Nati
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, 01307 Dresden, Germany
| | - Sundary Sormendi
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, 01307 Dresden, Germany
| | - Ales Neuwirth
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, 01307 Dresden, Germany
| | - Antonios Chatzigeorgiou
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, 01307 Dresden, Germany
| | - Athanasios Ziogas
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, 01307 Dresden, Germany
| | - Mathias Lesche
- DRESDEN-concept Genome Center, Center for Molecular and Cellular Bioengineering, Technische Universität Dresden, 01307 Dresden, Germany
| | - Andreas Dahl
- DRESDEN-concept Genome Center, Center for Molecular and Cellular Bioengineering, Technische Universität Dresden, 01307 Dresden, Germany
| | - Ian Henry
- Max-Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany
| | - Pallavi Subramanian
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, 01307 Dresden, Germany
| | - Ben Wielockx
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, 01307 Dresden, Germany
| | - Peter Murray
- Immunoregulation Group, Max Planck Institute of Biochemistry, 82152 Martinsried, Germany
| | - Peter Mirtschink
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, 01307 Dresden, Germany
| | - Kyoung-Jin Chung
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, 01307 Dresden, Germany
| | - Joachim L Schultze
- Department of Genomics and Immunoregulation, Life and Medical Science Institute, University of Bonn, 53115 Bonn, Germany; PRECISE - Platform for Single Cell Genomics and Epigenomics at the German Center for Neurodegenerative Diseases and the University of Bonn, 53115 Bonn, Germany
| | - Mihai G Netea
- Department of Genomics and Immunoregulation, Life and Medical Science Institute, University of Bonn, 53115 Bonn, Germany; Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, 6525 XZ, the Netherlands
| | - George Hajishengallis
- Department of Basic and Translational Sciences, Penn Dental Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Panayotis Verginis
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, 01307 Dresden, Germany; Laboratory of Immune Regulation and Tolerance, Autoimmunity and Inflammation, Biomedical Research Foundation of the Academy of Athens, 11527 Athens, Greece
| | - Ioannis Mitroulis
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, 01307 Dresden, Germany; National Center for Tumor Diseases, Partner Site Dresden, 01307 Dresden and German Cancer Research Center, Heidelberg, 69120 Heidelberg, Germany
| | - Triantafyllos Chavakis
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, 01307 Dresden, Germany; Centre for Cardiovascular Science, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, EH16 4TJ, UK.
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6
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Kalafati L, Mitroulis I, Verginis P, Chavakis T, Kourtzelis I. Neutrophils as Orchestrators in Tumor Development and Metastasis Formation. Front Oncol 2020; 10:581457. [PMID: 33363012 PMCID: PMC7758500 DOI: 10.3389/fonc.2020.581457] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 11/10/2020] [Indexed: 12/16/2022] Open
Abstract
Several lines of clinical and experimental evidence suggest that immune cell plasticity is a central player in tumorigenesis, tumor progression, and metastasis formation. Neutrophils are able to promote or inhibit tumor growth. Through their interaction with tumor cells or their crosstalk with other immune cell subsets in the tumor microenvironment, they modulate tumor cell survival. Here, we summarize current knowledge with regards to the mechanisms that underlie neutrophil–mediated effects on tumor establishment and metastasis development. We also discuss the tumor-mediated effects on granulopoiesis and neutrophil precursors in the bone marrow and the involvement of neutrophils in anti-tumor therapeutic modalities.
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Affiliation(s)
- Lydia Kalafati
- Institute for Clinical Chemistry and Laboratory Medicine, University Hospital and Faculty of Medicine, Technische Universität Dresden, Dresden, Germany.,National Center for Tumor Diseases, Partner Site Dresden and German Cancer Research Center, Heidelberg, Germany
| | - Ioannis Mitroulis
- National Center for Tumor Diseases, Partner Site Dresden and German Cancer Research Center, Heidelberg, Germany.,Department of Hematology and Laboratory of Molecular Hematology, Department of Medicine, Democritus University of Thrace, Alexandroupolis, Greece
| | - Panayotis Verginis
- University of Crete, School of Medicine, Heraklion, Greece.,Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas, Heraklion, Crete, Greece
| | - Triantafyllos Chavakis
- Institute for Clinical Chemistry and Laboratory Medicine, University Hospital and Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Ioannis Kourtzelis
- York Biomedical Research Institute, Hull York Medical School, University of York, York, United Kingdom
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7
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Abstract
Efficient inflammation resolution is important not only for the termination of the inflammatory response but also for the restoration of tissue integrity. An integral process to resolution of inflammation is the phagocytosis of dying cells by macrophages, known as efferocytosis. This function is mediated by a complex and well-orchestrated network of interactions amongst specialized phagocytic receptors, bridging molecules, as well as “find-me” and “eat-me” signals. Efferocytosis serves not only as a waste disposal mechanism (clearance of the apoptotic cells) but also promotes a pro-resolving phenotype in efferocytic macrophages and thereby termination of inflammation. Alterations in cellular metabolism are critical for shaping the phenotype and function of efferocytic macrophages, thus, representing an important determinant of macrophage plasticity. Impaired efferocytosis can result in inflammation-associated pathologies or autoimmunity. The present mini review summarizes current knowledge regarding the mechanisms regulating macrophage efferocytosis during clearance of inflammation.
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Affiliation(s)
- Ioannis Kourtzelis
- Institute for Clinical Chemistry and Laboratory Medicine, University Hospital and Faculty of Medicine, Technische Universität Dresden, Dresden, Germany.,Hull York Medical School, York Biomedical Research Institute, University of York, York, United Kingdom
| | - George Hajishengallis
- Laboratory of Innate Immunity and Inflammation, Penn Dental Medicine, Department of Basic and Translational Sciences, University of Pennsylvania, Philadelphia, PA, United States
| | - Triantafyllos Chavakis
- Institute for Clinical Chemistry and Laboratory Medicine, University Hospital and Faculty of Medicine, Technische Universität Dresden, Dresden, Germany.,Centre for Cardiovascular Science, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
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8
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Troullinaki M, Chen LS, Witt A, Pyrina I, Phieler J, Kourtzelis I, Chmelar J, Sprott D, Gercken B, Koutsilieris M, Chavakis T, Chatzigeorgiou A. Robo4-mediated pancreatic endothelial integrity decreases inflammation and islet destruction in autoimmune diabetes. FASEB J 2020; 34:3336-3346. [PMID: 31916652 DOI: 10.1096/fj.201900125rr] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 12/23/2019] [Accepted: 12/24/2019] [Indexed: 12/18/2022]
Abstract
In Type 1 Diabetes Mellitus (T1DM), leukocyte infiltration of the pancreatic islets and the resulting immune-mediated destruction of beta cells precede hyperglycemia and clinical disease symptoms. In this context, the role of the pancreatic endothelium as a barrier for autoimmunity- and inflammation-related destruction of the islets is not well studied. Here, we identified Robo4, expressed on endothelial cells, as a regulator of pancreatic vascular endothelial permeability during autoimmune diabetes. Circulating levels of Robo4 were upregulated in mice subjected to the Multiple Low-Dose Streptozotocin (MLDS) model of diabetes. Upon MLDS induction, Robo4-deficiency resulted in increased pancreatic vascular permeability, leukocyte infiltration to the islets and islet apoptosis, associated with reduced insulin levels and faster diabetes development. On the contrary, in vivo administration of Slit2 in mice modestly delayed the emergence of hyperglycaemia and ameliorated islet inflammation in MLDS-induced diabetes. Thus, Robo4-mediated endothelial barrier integrity reduces insulitis and islet destruction in autoimmune diabetes. Our findings highlight the importance of the endothelium as gatekeeper of pancreatic inflammation during T1DM development and may pave the way for novel Robo4-related therapeutic approaches for autoimmune diabetes.
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Affiliation(s)
- Maria Troullinaki
- Institute for Clinical Chemistry and Laboratory Medicine, University Clinic Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Lan-Sun Chen
- Institute for Clinical Chemistry and Laboratory Medicine, University Clinic Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Anke Witt
- Institute for Clinical Chemistry and Laboratory Medicine, University Clinic Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Iryna Pyrina
- Institute for Clinical Chemistry and Laboratory Medicine, University Clinic Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Julia Phieler
- Institute for Clinical Chemistry and Laboratory Medicine, University Clinic Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Ioannis Kourtzelis
- Institute for Clinical Chemistry and Laboratory Medicine, University Clinic Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Jindrich Chmelar
- Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic
| | - David Sprott
- Institute for Clinical Chemistry and Laboratory Medicine, University Clinic Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Bettina Gercken
- Institute for Clinical Chemistry and Laboratory Medicine, University Clinic Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Michael Koutsilieris
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Triantafyllos Chavakis
- Institute for Clinical Chemistry and Laboratory Medicine, University Clinic Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.,Paul Langerhans Institute Dresden of the Helmholtz Center Munich, University Hospital and Faculty of Medicine, TU Dresden, Dresden, Germany.,German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Antonios Chatzigeorgiou
- Institute for Clinical Chemistry and Laboratory Medicine, University Clinic Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.,Department of Physiology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
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9
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Nikolakopoulou P, Chatzigeorgiou A, Kourtzelis I, Toutouna L, Masjkur J, Arps-Forker C, Poser SW, Rozman J, Rathkolb B, Aguilar-Pimentel JA, Wolf E, Klingenspor M, Ollert M, Schmidt-Weber C, Fuchs H, Gailus-Durner V, Hrabe de Angelis M, Tsata V, Monasor LS, Troullinaki M, Witt A, Anastasiou V, Chrousos G, Yi CX, García-Cáceres C, Tschöp MH, Bornstein SR, Androutsellis-Theotokis A. Streptozotocin-induced β-cell damage, high fat diet, and metformin administration regulate Hes3 expression in the adult mouse brain. Sci Rep 2018; 8:11335. [PMID: 30054579 PMCID: PMC6063949 DOI: 10.1038/s41598-018-29434-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 07/09/2018] [Indexed: 12/18/2022] Open
Abstract
Diabetes mellitus is a group of disorders characterized by prolonged high levels of circulating blood glucose. Type 1 diabetes is caused by decreased insulin production in the pancreas whereas type 2 diabetes may develop due to obesity and lack of exercise; it begins with insulin resistance whereby cells fail to respond properly to insulin and it may also progress to decreased insulin levels. The brain is an important target for insulin, and there is great interest in understanding how diabetes affects the brain. In addition to the direct effects of insulin on the brain, diabetes may also impact the brain through modulation of the inflammatory system. Here we investigate how perturbation of circulating insulin levels affects the expression of Hes3, a transcription factor expressed in neural stem and progenitor cells that is involved in tissue regeneration. Our data show that streptozotocin-induced β-cell damage, high fat diet, as well as metformin, a common type 2 diabetes medication, regulate Hes3 levels in the brain. This work suggests that Hes3 is a valuable biomarker helping to monitor the state of endogenous neural stem and progenitor cells in the context of diabetes mellitus.
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Affiliation(s)
| | - Antonios Chatzigeorgiou
- Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, Dresden, Germany
| | - Ioannis Kourtzelis
- Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, Dresden, Germany
| | - Louiza Toutouna
- Department of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Jimmy Masjkur
- Department of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Carina Arps-Forker
- Department of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Steven W Poser
- Department of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Jan Rozman
- German Mouse Clinic, Institute of Experimental Genetics, Helmholtz Zentrum München, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany.,German Center for Diabetes Research (DZD), Ingolstädter Landstr. 1, 85764, Neuherberg, Germany
| | - Birgit Rathkolb
- German Mouse Clinic, Institute of Experimental Genetics, Helmholtz Zentrum München, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany.,German Center for Diabetes Research (DZD), Ingolstädter Landstr. 1, 85764, Neuherberg, Germany.,Institute of Molecular Animal Breeding and Biotechnology, Gene Center, Ludwig-Maximilians-University Munich, Feodor-Lynen Str. 25, 81377, Munich, Germany
| | - Juan Antonio Aguilar-Pimentel
- German Mouse Clinic, Institute of Experimental Genetics, Helmholtz Zentrum München, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany
| | | | - Eckhard Wolf
- Institute of Molecular Animal Breeding and Biotechnology, Gene Center, Ludwig-Maximilians-University Munich, Feodor-Lynen Str. 25, 81377, Munich, Germany
| | - Martin Klingenspor
- Chair of Molecular Nutritional Medicine, Technical University Munich, EKFZ - Else Kröner Fresenius Center for Nutritional Medicine, Gregor-Mendel-Str. 2, 85350, Freising-Weihenstephan, Germany.,ZIEL - Institute for Food and Health, Technical University Munich, Gregor-Mendel-Str. 2, 85350, Freising-Weihenstephan, Germany
| | - Markus Ollert
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg.,Department of Dermatology and Allergy Center, Odense Research Center for Anaphylaxis, University of Southern Denmark, Odense, Denmark
| | - Carsten Schmidt-Weber
- Center of Allergy & Environment (ZAUM), Technische Universität München, and Helmholtz Zentrum München, Ingolstädter Landstr.1, 85764, Neuherberg, Germany
| | - Helmut Fuchs
- German Mouse Clinic, Institute of Experimental Genetics, Helmholtz Zentrum München, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany
| | - Valerie Gailus-Durner
- German Mouse Clinic, Institute of Experimental Genetics, Helmholtz Zentrum München, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany
| | - Martin Hrabe de Angelis
- German Mouse Clinic, Institute of Experimental Genetics, Helmholtz Zentrum München, Ingolstädter Landstr. 1, 85764, Neuherberg, Germany.,German Center for Diabetes Research (DZD), Ingolstädter Landstr. 1, 85764, Neuherberg, Germany.,Chair of Experimental Genetics, School of Life Science Weihenstephan, Technische Universität München, Alte Akademie 8, 85354, Freising, Germany
| | - Vasiliki Tsata
- DFG-Center for Regenerative Therapies Dresden, Cluster of Excellence, Technische Universität Dresden, Dresden, Germany
| | | | - Maria Troullinaki
- Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, Dresden, Germany
| | - Anke Witt
- Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, Dresden, Germany
| | - Vivian Anastasiou
- DZD/Paul Langerhans Institute Dresden of Helmholtz Centre Munich, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - George Chrousos
- First Department of Pediatrics, National and Kapodistrian University of Athens Medical School, Athens, Greece.,Aghia Sophia Children's Hospital, Athens, Greece
| | - Chun-Xia Yi
- Department of Endocrinology and Metabolism, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.,Helmholtz Diabetes Center (HDC) & German Center for Diabetes Research (DZD), Helmholtz Zentrum München, 85764, Neuherberg, Germany
| | - Cristina García-Cáceres
- Helmholtz Diabetes Center (HDC) & German Center for Diabetes Research (DZD), Helmholtz Zentrum München, 85764, Neuherberg, Germany
| | - Matthias H Tschöp
- Helmholtz Diabetes Center (HDC) & German Center for Diabetes Research (DZD), Helmholtz Zentrum München, 85764, Neuherberg, Germany.,Division of Metabolic Diseases, Technische Universität München, 80333, Munich, Germany
| | - Stefan R Bornstein
- Department of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Andreas Androutsellis-Theotokis
- Department of Medicine, Technische Universität Dresden, Dresden, Germany. .,DFG-Center for Regenerative Therapies Dresden, Cluster of Excellence, Technische Universität Dresden, Dresden, Germany. .,Division of Cancer and Stem Cells, University of Nottingham, Nottingham, NG7 2RD, UK.
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10
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Chen LS, Kourtzelis I, Singh RP, Grossklaus S, Wielockx B, Hajishengallis G, Chavakis T, Mitroulis I. Endothelial Cell-Specific Overexpression of Del-1 Drives Expansion of Haematopoietic Progenitor Cells in the Bone Marrow. Thromb Haemost 2018; 118:613-616. [PMID: 29415284 PMCID: PMC6081267 DOI: 10.1055/s-0038-1624582] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Lan-Sun Chen
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - Ioannis Kourtzelis
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - Rashim Pal Singh
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - Sylvia Grossklaus
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - Ben Wielockx
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - George Hajishengallis
- Department of Microbiology, University of Pennsylvania School of Dental Medicine, Philadelphia, Pennsylvania, United States
| | - Triantafyllos Chavakis
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - Ioannis Mitroulis
- Institute of Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
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11
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Bekkering S, Arts RJ, Novakovic B, Kourtzelis I, van der Heijden CD, Li Y, Popa CD, ter Horst R, van Tuijl J, Netea-Maier RT, van de Veerdonk FL, Chavakis T, Joosten LA, van der Meer JW, Stunnenberg H, Riksen NP, Netea MG. Metabolic Induction of Trained Immunity through the Mevalonate Pathway. Cell 2018; 172:135-146.e9. [DOI: 10.1016/j.cell.2017.11.025] [Citation(s) in RCA: 291] [Impact Index Per Article: 48.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 08/29/2017] [Accepted: 11/13/2017] [Indexed: 12/12/2022]
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12
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Mitroulis I, Chen LS, Singh RP, Kourtzelis I, Economopoulou M, Kajikawa T, Troullinaki M, Ziogas A, Ruppova K, Hosur K, Maekawa T, Wang B, Subramanian P, Tonn T, Verginis P, von Bonin M, Wobus M, Bornhäuser M, Grinenko T, Di Scala M, Hidalgo A, Wielockx B, Hajishengallis G, Chavakis T. Secreted protein Del-1 regulates myelopoiesis in the hematopoietic stem cell niche. J Clin Invest 2017; 127:3624-3639. [PMID: 28846069 DOI: 10.1172/jci92571] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Accepted: 07/11/2017] [Indexed: 12/16/2022] Open
Abstract
Hematopoietic stem cells (HSCs) remain mostly quiescent under steady-state conditions but switch to a proliferative state following hematopoietic stress, e.g., bone marrow (BM) injury, transplantation, or systemic infection and inflammation. The homeostatic balance between quiescence, self-renewal, and differentiation of HSCs is strongly dependent on their interactions with cells that constitute a specialized microanatomical environment in the BM known as the HSC niche. Here, we identified the secreted extracellular matrix protein Del-1 as a component and regulator of the HSC niche. Specifically, we found that Del-1 was expressed by several cellular components of the HSC niche, including arteriolar endothelial cells, CXCL12-abundant reticular (CAR) cells, and cells of the osteoblastic lineage. Del-1 promoted critical functions of the HSC niche, as it regulated long-term HSC (LT-HSC) proliferation and differentiation toward the myeloid lineage. Del-1 deficiency in mice resulted in reduced LT-HSC proliferation and infringed preferentially upon myelopoiesis under both steady-state and stressful conditions, such as hematopoietic cell transplantation and G-CSF- or inflammation-induced stress myelopoiesis. Del-1-induced HSC proliferation and myeloid lineage commitment were mediated by β3 integrin on hematopoietic progenitors. This hitherto unknown Del-1 function in the HSC niche represents a juxtacrine homeostatic adaptation of the hematopoietic system in stress myelopoiesis.
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Affiliation(s)
- Ioannis Mitroulis
- Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, and
| | - Lan-Sun Chen
- Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, and
| | - Rashim Pal Singh
- Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, and
| | - Ioannis Kourtzelis
- Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, and
| | - Matina Economopoulou
- Department of Ophthalmology, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Tetsuhiro Kajikawa
- Department of Microbiology, Penn Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Maria Troullinaki
- Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, and
| | - Athanasios Ziogas
- Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, and
| | - Klara Ruppova
- Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, and
| | - Kavita Hosur
- Department of Microbiology, Penn Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Tomoki Maekawa
- Department of Microbiology, Penn Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Baomei Wang
- Department of Microbiology, Penn Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Pallavi Subramanian
- Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, and
| | - Torsten Tonn
- Institute for Transfusion Medicine, German Red Cross Blood Donation Service North-East, Dresden, Germany
| | - Panayotis Verginis
- Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, and.,Biomedical Research Foundation of the Academy of Athens, Athens, Greece
| | - Malte von Bonin
- Medical Clinic and Policlinic I, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Manja Wobus
- Medical Clinic and Policlinic I, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Martin Bornhäuser
- Medical Clinic and Policlinic I, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.,Center for Regenerative Therapies Dresden, Dresden, Germany
| | - Tatyana Grinenko
- Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, and
| | - Marianna Di Scala
- Area of Cell and Developmental Biology, Fundación Centro Nacional de Investigaciones Cardiovasculares (CNIC) Carlos III, Madrid, Spain
| | - Andres Hidalgo
- Area of Cell and Developmental Biology, Fundación Centro Nacional de Investigaciones Cardiovasculares (CNIC) Carlos III, Madrid, Spain.,Institute for Cardiovascular Prevention, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Ben Wielockx
- Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, and.,Center for Regenerative Therapies Dresden, Dresden, Germany
| | - George Hajishengallis
- Department of Microbiology, Penn Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Triantafyllos Chavakis
- Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, and.,Center for Regenerative Therapies Dresden, Dresden, Germany
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13
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Kourtzelis I, Mitroulis I, von Renesse J, Hajishengallis G, Chavakis T. From leukocyte recruitment to resolution of inflammation: the cardinal role of integrins. J Leukoc Biol 2017; 102:677-683. [PMID: 28292945 DOI: 10.1189/jlb.3mr0117-024r] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 02/21/2017] [Accepted: 02/23/2017] [Indexed: 12/23/2022] Open
Abstract
Integrins constitute a large group of adhesion receptors that are formed as heterodimers of α and β subunits. Their presence and activation status on the surface of leukocytes modulate a broad spectrum of processes in inflammation and immunity. This mini review critically outlines research advances with regard to the function of leukocyte integrins in regulating and integrating the onset and resolution of acute inflammation. Specifically, we summarize and discuss relevant, current literature that supports the multifunctional role of integrins and their partners. The latter include molecules that physically associate with integrins or regulate their activity in the context of the following: 1) leukocyte recruitment to an inflamed tissue, 2) recognition and phagocytosis of apoptotic neutrophils (efferocytosis), and 3) egress of efferocytic macrophages from the inflamed site to lymphoid tissues. The understanding of the fine-tuning mechanisms of the aforementioned processes by integrins and their functional partners may enable the design of therapeutic tools to counteract destructive inflammation and promote more efficient resolution of inflammation.
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Affiliation(s)
- Ioannis Kourtzelis
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany; and
| | - Ioannis Mitroulis
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany; and
| | - Janusz von Renesse
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany; and
| | - George Hajishengallis
- Department of Microbiology, University of Pennsylvania, School of Dental Medicine, Philadelphia, Pennsylvania, USA
| | - Triantafyllos Chavakis
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany; and
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14
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Abicht JM, Kourtzelis I, Reichart B, Koutsogiannaki S, Primikyri A, Lambris JD, Chavakis T, Holdt L, Kind A, Guethoff S, Mayr T. Complement C3 inhibitor Cp40 attenuates xenoreactions in pig hearts perfused with human blood. Xenotransplantation 2017; 24:10.1111/xen.12262. [PMID: 27677785 PMCID: PMC5358808 DOI: 10.1111/xen.12262] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 07/11/2016] [Accepted: 08/12/2016] [Indexed: 01/26/2023]
Abstract
BACKGROUND The complement system plays a crucial role in acute xenogeneic reactions after cardiac transplantation. We used an ex vivo perfusion model to investigate the effect of Cp40, a compstatin analog and potent inhibitor of complement at the level of C3. METHODS Fifteen wild-type pig hearts were explanted, cardiopleged, and reperfused ex vivo after 150 minutes of cold ischemia. Hearts were challenged in a biventricular working heart mode to evaluate cardiac perfusion and function. In the treatment group (n=5), the complement cascade was blocked at the level of C3 using Cp40, using diluted human blood. Untreated human and porcine blood was used for controls. RESULTS Throughout the perfusion, C3 activation was inhibited when Cp40 was used (mean of all time points: 1.11 ± 0.34% vs 3.12 ± 0.48% control activation; P<.01). Compared to xenoperfused controls, the cardiac index improved significantly in the treated group (6.5 ± 4.2 vs 3.5 ± 4.8 mL/min/g; P=.03, 180 minutes perfusion), while the concentration of lactate dehydrogenase as a maker for cell degradation was reduced in the perfusate (583 ± 187 U/mL vs 2108 ± 1145 U/mL, P=.02). Histological examination revealed less hemorrhage and edema, and immunohistochemistry confirmed less complement fragment deposition than in untreated xenoperfused controls. CONCLUSIONS Cp40 efficiently prevents C3 activation of the complement system, resulting in reduced cell damage and preserved function in wild-type porcine hearts xenoperfused ex vivo. We suggest that this compstatin analog, which blocks all main pathways of complement activation, could be a beneficial perioperative treatment in preclinical and in future clinical xenotransplantation.
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Affiliation(s)
- Jan-Michael Abicht
- Department of Anaesthesiology, Ludwig Maximilian University, Munich, Germany
| | - Ioannis Kourtzelis
- Department of Clinical Pathobiochemistry, Medical Faculty, Technische Universität Dresden, Germany
| | - Bruno Reichart
- Walter-Brendel-Centre, Ludwig Maximilian University Munich, Germany
| | - Sophia Koutsogiannaki
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, USA
| | - Alexandra Primikyri
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, USA
| | - John D. Lambris
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, USA
| | - Triantafyllos Chavakis
- Department of Clinical Pathobiochemistry, Medical Faculty, Technische Universität Dresden, Germany
| | - Lesca Holdt
- Institute of Laboratory Medicine of Ludwig Maximilian University, Munich, Germany
| | - Alexander Kind
- Chair of Livestock Biotechnology, School of Life Sciences Weihenstephan, Technical University of Munich, Germany
| | - Sonja Guethoff
- Department of Cardiovascular Surgery, Ludwig Maximilian University, Munich, Germany
| | - Tanja Mayr
- Department of Anaesthesiology, Ludwig Maximilian University, Munich, Germany
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15
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Sapanidou V, Taitzoglou I, Tsakmakidis I, Kourtzelis I, Fletouris D, Theodoridis A, Lavrentiadou S, Tsantarliotou M. Protective effect of crocetin on bovine spermatozoa against oxidative stress during in vitro fertilization. Andrology 2016; 4:1138-1149. [PMID: 27575445 DOI: 10.1111/andr.12248] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 05/30/2016] [Accepted: 06/10/2016] [Indexed: 12/17/2022]
Abstract
Oxidative stress is one of the major factors that contribute to poor semen quality and low rates of in vitro fertilization. Crocetin, a main constituent of saffron (Crocus sativus L.) possesses potent antioxidant activity, by scavenging reactive oxygen species (ROS) and/or enhancing the activity of intracellular antioxidant enzymes. The aim of this study was to investigate, for the first time, the effect of crocetin on the quality characteristics of bull spermatozoa and fertilization rate. For this reason, frozen/thawed bovine spermatozoa were incubated with crocetin (1, 2.5, and 5 μm), for 120 or 240 min, in the presence of a negative control, and evaluated in terms of motility, viability, acrosomal status, DNA fragmentation index, intracellular ROS, and lipid peroxidation. In order to evaluate the impact of crocetin on cleavage and blastocyst rate, the compound was added in the IVF medium at the previously identified optimal concentration (2.5 μm). The results indicate that incubation of spermatozoa with 2.5 μm of crocetin resulted in a statistically significant lower production of superoxide anion and hydrogen peroxide, lower lipid peroxidation, and in better maintenance of motility parameters, viability, and acrosomal integrity, with a very small number of cells with DNA fragmentation, compared to the other groups (p < 0.05). The presence of crocetin (2.5 μm) in the fertilization medium also resulted in a significant increase in acrosome-reacted spermatozoa and blastocyst production, compared to the control group (p < 0.01). These data indicate that crocetin (2.5 μm) positively affects bovine sperm quality characteristics during a 240-min incubation and improves its fertilizing ability, directly and/or indirectly, by regulating ROS concentration and lipid peroxidation.
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Affiliation(s)
- V Sapanidou
- Laboratory of Physiology, School of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - I Taitzoglou
- Laboratory of Physiology, School of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - I Tsakmakidis
- Clinic of Farm Animals, School of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - I Kourtzelis
- Laboratory of Genetics and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - D Fletouris
- Laboratory of Hygiene and Technology of Food Animal Origin, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Greece
| | - A Theodoridis
- Laboratory of Animal Production Economics, School of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - S Lavrentiadou
- Laboratory of Physiology, School of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - M Tsantarliotou
- Laboratory of Physiology, School of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
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16
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Abstract
Chronic inflammation has been linked to the initiation of carcinogenesis, as well as the advancement of established tumors. The polarization of the tumor inflammatory microenvironment can contribute to either the control, or the progression of the disease. The emerging participation of members of the complement cascade in several hallmarks of cancer, renders it a potential target for anti-tumor treatment. Moreover, the presence of complement regulatory proteins (CRPs) in most types of tumor cells is known to impede anti-tumor therapies. This review focuses on our current knowledge of complement's potential involvement in shaping the inflammatory tumor microenvironment and its role on the regulation of angiogenesis and hypoxia. Furthermore, we discuss approaches using complement-based therapies as an adjuvant in tumor immunotherapy.
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Affiliation(s)
- Ioannis Kourtzelis
- Department of Clinical Pathobiochemistry, Technische Universität Dresden, 01307 Dresden, Germany
| | - Stavros Rafail
- Ovarian Cancer Research Center, University of Pennsylvania, Philadelphia, PA 19104-6160, USA
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17
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Kourtzelis I, Kotlabova K, Lim JH, Mitroulis I, Ferreira A, Chen LS, Gercken B, Steffen A, Kemter E, Klotzsche-von Ameln A, Waskow C, Hosur K, Chatzigeorgiou A, Ludwig B, Wolf E, Hajishengallis G, Chavakis T. Developmental endothelial locus-1 modulates platelet-monocyte interactions and instant blood-mediated inflammatory reaction in islet transplantation. Thromb Haemost 2015; 115:781-8. [PMID: 26676803 DOI: 10.1160/th15-05-0429] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Accepted: 11/25/2015] [Indexed: 01/18/2023]
Abstract
Platelet-monocyte interactions are strongly implicated in thrombo-inflammatory injury by actively contributing to intravascular inflammation, leukocyte recruitment to inflamed sites, and the amplification of the procoagulant response. Instant blood-mediated inflammatory reaction (IBMIR) represents thrombo-inflammatory injury elicited upon pancreatic islet transplantation (islet-Tx), thereby dramatically affecting transplant survival and function. Developmental endothelial locus-1 (Del-1) is a functionally versatile endothelial cell-derived homeostatic factor with anti-inflammatory properties, but its potential role in IBMIR has not been previously addressed. Here, we establish Del-1 as a novel inhibitor of IBMIR using a whole blood-islet model and a syngeneic murine transplantation model. Indeed, Del-1 pre-treatment of blood before addition of islets diminished coagulation activation and islet damage as assessed by C-peptide release. Consistently, intraportal islet-Tx in transgenic mice with endothelial cell-specific overexpression of Del-1 resulted in a marked decrease of monocytes and platelet-monocyte aggregates in the transplanted tissues, relative to those in wild-type recipients. Mechanistically, Del-1 decreased platelet-monocyte aggregate formation, by specifically blocking the interaction between monocyte Mac-1-integrin and platelet GPIb. Our findings reveal a hitherto unknown role of Del-1 in the regulation of platelet-monocyte interplay and the subsequent heterotypic aggregate formation in the context of IBMIR. Therefore, Del-1 may represent a novel approach to prevent or mitigate the adverse reactions mediated through thrombo-inflammatory pathways in islet-Tx and perhaps other inflammatory disorders involving platelet-leukocyte aggregate formation.
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Affiliation(s)
- Ioannis Kourtzelis
- Dr. Ioannis Kourtzelis, Department of Clinical Pathobiochemistry, Medical Faculty, Technische Universität Dresden, Fetscherstraße 74, 01307 Dresden, Germany, Tel.: +49 351 4586250, E-mail:
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Sapanidou V, Taitzoglou I, Tsakmakidis Ι, Kourtzelis I, Fletouris D, Theodoridis A, Zervos I, Tsantarliotou M. Antioxidant effect of crocin on bovine sperm quality and in vitro fertilization. Theriogenology 2015; 84:1273-82. [DOI: 10.1016/j.theriogenology.2015.07.005] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Revised: 07/01/2015] [Accepted: 07/01/2015] [Indexed: 10/23/2022]
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Kourtzelis I, Ferreira A, Mitroulis I, Ricklin D, Bornstein SR, Waskow C, Lambris JD, Chavakis T. Complement inhibition in a xenogeneic model of interactions between human whole blood and porcine endothelium. Horm Metab Res 2015; 47:36-42. [PMID: 25350518 PMCID: PMC4383746 DOI: 10.1055/s-0034-1390452] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Xenotransplantation (xeno-Tx) is considered as an alternative solution to overcome the shortage of human donor organs. However, the success of xeno-Tx is hindered by immune reactions against xenogeneic cells (e. g. of porcine origin). More specifically, activation of innate immune mechanisms such as complement and triggering of the coagulation cascade occur shortly after xeno-Tx, and adhesion of human leukocytes to porcine endothelium is another early critical step mediating the immune attack. To investigate the therapeutic potential of complement inhibition in the context of xenogeneic interactions, we have employed a whole-blood model in the present study. Incubation of human blood with porcine endothelial cells (PAECs) led to activation of complement and coagulation as well as to increased leukocyte adhesion. The observed responses can be attributed to the pig-to-human xenogeneicity, since the presence of human endothelium induced a minor cellular and plasmatic inflammatory response. Importantly, complement inhibition using a potent complement C3 inhibitor, compstatin analogue Cp40, abrogated the adhesion of leukocytes and, more specifically, the attachment of neutrophils to porcine endothelium. Moreover, Cp40 inhibited the activation of PAECs and leukocytes, since the levels of the adhesion molecules E-selectin, ICAM-1, ICAM-2, and VCAM-1 on PAECs and the surface expression of integrin CD11b on neutrophils were significantly decreased. Along the same line, inhibition of CD11b resulted in decreased leukocyte adhesion. Taken together, our findings provide a better understanding of the mechanisms regulating the acute innate immune complications in the context of xeno-Tx and could pave the way for complement-targeting therapeutic interventions.
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Affiliation(s)
- I. Kourtzelis
- Department of Clinical Pathobiochemistry, Technische Universität Dresden, Dresden, Germany
| | - A. Ferreira
- Department of Clinical Pathobiochemistry, Technische Universität Dresden, Dresden, Germany
| | - I. Mitroulis
- Department of Clinical Pathobiochemistry, Technische Universität Dresden, Dresden, Germany
- Institute for Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
| | - D. Ricklin
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - S. R. Bornstein
- Department of Internal Medicine, Technische Universität Dresden, Dresden, Germany
| | - C. Waskow
- Regeneration in Hematopoiesis and Animal Models in Hematopoiesis, Institute of Immunology, Medical Faculty, Technische Universität Dresden, Dresden, Germany
| | - J. D. Lambris
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - T. Chavakis
- Department of Clinical Pathobiochemistry, Technische Universität Dresden, Dresden, Germany
- Institute for Clinical Chemistry and Laboratory Medicine, Technische Universität Dresden, Dresden, Germany
- Department of Internal Medicine, Technische Universität Dresden, Dresden, Germany
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Kourtzelis I, Magnusson PU, Kotlabova K, Lambris JD, Chavakis T. Regulation of Instant Blood Mediated Inflammatory Reaction (IBMIR) in Pancreatic Islet Xeno-Transplantation: Points for Therapeutic Interventions. Advances in Experimental Medicine and Biology 2015; 865:171-88. [DOI: 10.1007/978-3-319-18603-0_11] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Rafail S, Kourtzelis I, Foukas PG, Markiewski MM, DeAngelis RA, Guariento M, Ricklin D, Grice EA, Lambris JD. Complement deficiency promotes cutaneous wound healing in mice. J Immunol 2014; 194:1285-91. [PMID: 25548229 DOI: 10.4049/jimmunol.1402354] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Wound healing is a complex homeostatic response to injury that engages numerous cellular activities, processes, and cell-to-cell interactions. The complement system, an intricate network of proteins with important roles in immune surveillance and homeostasis, has been implicated in many physiological processes; however, its role in wound healing remains largely unexplored. In this study, we employ a murine model of excisional cutaneous wound healing and show that C3(-/-) mice exhibit accelerated early stages of wound healing. Reconstitution of C3(-/-) mice with serum from C3(+/+) mice or purified human C3 abrogated the accelerated wound-healing phenotype. Wound histology of C3(-/-) mice revealed a reduction in inflammatory infiltrate compared with C3(+/+) mice. C3 deficiency also resulted in increased accumulation of mast cells and advanced angiogenesis. We further show that mice deficient in the downstream complement effector C5 exhibit a similar wound-healing phenotype, which is recapitulated in C5aR1(-/-) mice, but not C3aR(-/-) or C5aR2(-/-) mice. Taken together, these data suggest that C5a signaling through C5aR may in part play a pivotal role in recruitment and activation of inflammatory cells to the wound environment, which in turn could delay the early stages of cutaneous wound healing. These findings also suggest a previously underappreciated role for complement in wound healing, and may have therapeutic implications for conditions of delayed wound healing.
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Affiliation(s)
- Stavros Rafail
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Ioannis Kourtzelis
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104; Abteilung für Klinische Pathobiochemie, Medizinische Fakultät, Technische Universität Dresden, 01307 Dresden, Germany
| | - Periklis G Foukas
- Second Department of Pathology, School of Medicine, University of Athens, Athens, 124 62 Greece; and
| | - Maciej M Markiewski
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Robert A DeAngelis
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Mara Guariento
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Daniel Ricklin
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Elizabeth A Grice
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - John D Lambris
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104;
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Mitroulis I, Alexaki VI, Kourtzelis I, Ziogas A, Hajishengallis G, Chavakis T. Leukocyte integrins: role in leukocyte recruitment and as therapeutic targets in inflammatory disease. Pharmacol Ther 2014; 147:123-135. [PMID: 25448040 DOI: 10.1016/j.pharmthera.2014.11.008] [Citation(s) in RCA: 181] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Accepted: 11/06/2014] [Indexed: 02/06/2023]
Abstract
Infection or sterile inflammation triggers site-specific attraction of leukocytes. Leukocyte recruitment is a process comprising several steps orchestrated by adhesion molecules, chemokines, cytokines and endogenous regulatory molecules. Distinct adhesive interactions between endothelial cells and leukocytes and signaling mechanisms contribute to the temporal and spatial fine-tuning of the leukocyte adhesion cascade. Central players in the leukocyte adhesion cascade include the leukocyte adhesion receptors of the β2-integrin family, such as the αLβ2 and αMβ2 integrins, or of the β1-integrin family, such as the α4β1-integrin. Given the central involvement of leukocyte recruitment in different inflammatory and autoimmune diseases, the leukocyte adhesion cascade in general, and leukocyte integrins in particular, represent key therapeutic targets. In this context, the present review focuses on the role of leukocyte integrins in the leukocyte adhesion cascade. Experimental evidence that has implicated leukocyte integrins as targets in animal models of inflammatory disorders, such as experimental autoimmune encephalomyelitis, psoriasis, inflammatory bone loss and inflammatory bowel disease as well as preclinical and clinical therapeutic applications of antibodies that target leukocyte integrins in various inflammatory disorders are presented. Finally, we review recent findings on endogenous inhibitors that modify leukocyte integrin function, which could emerge as promising therapeutic targets.
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Affiliation(s)
- Ioannis Mitroulis
- Department of Clinical Pathobiochemistry and Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Vasileia I Alexaki
- Department of Clinical Pathobiochemistry and Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Ioannis Kourtzelis
- Department of Clinical Pathobiochemistry and Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Athanassios Ziogas
- Department of Clinical Pathobiochemistry and Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - George Hajishengallis
- Department of Microbiology, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Triantafyllos Chavakis
- Department of Clinical Pathobiochemistry and Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
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Kourtzelis I, Rafail S, DeAngelis RA, Foukas PG, Ricklin D, Lambris JD. Inhibition of biomaterial-induced complement activation attenuates the inflammatory host response to implantation. FASEB J 2013; 27:2768-76. [PMID: 23558338 DOI: 10.1096/fj.12-225888] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Although complement is a known contributor to biomaterial-induced complications, pathological implications and therapeutic options remain to be explored. Here we investigated the involvement of complement in the inflammatory response to polypropylene meshes commonly used for hernia repair. In vitro assays revealed deposition of complement activation fragments on the mesh after incubation in plasma. Moreover, significant mesh-induced complement and granulocyte activation was observed in plasma and leukocyte preparations, respectively. Pretreatment of plasma with the complement inhibitor compstatin reduced opsonization >2-fold, and compstatin and a C5a receptor antagonist (C5aRa) impaired granulocyte activation by 50 and 67%, respectively. We established a clinically relevant mouse model of implantation and could confirm deposition of C3 activation fragments on mesh implants in vivo using immunofluorescence. In meshes extracted after subcutaneous or peritoneal implantation, the amount of immune cell infiltrate in mice deficient in key complement components (C3, C5aR), or treated with C5aRa, was approximately half of that observed in wild-type littermates or mice treated with inactive C5aRa, respectively. Our data suggest that implantation of a widely used surgical mesh triggers the formation of an inflammatory cell microenvironment at the implant site through complement activation, and indicates a path for the therapeutic modulation of implant-related complications.
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Affiliation(s)
- Ioannis Kourtzelis
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, 422 Curie Blvd., Philadelphia, PA 19104, USA
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Ignea C, Trikka FA, Kourtzelis I, Argiriou A, Kanellis AK, Kampranis SC, Makris AM. Positive genetic interactors of HMG2 identify a new set of genetic perturbations for improving sesquiterpene production in Saccharomyces cerevisiae. Microb Cell Fact 2012; 11:162. [PMID: 23259547 PMCID: PMC3541075 DOI: 10.1186/1475-2859-11-162] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Accepted: 12/16/2012] [Indexed: 11/30/2022] Open
Abstract
Background Terpenoids and isoprenoids are an important class of natural products, which includes currently used drugs, high value bioactive and industrial compounds, and fuel candidates. Due to their industrial application, there is increasing interest in the development of S. cerevisiae strains capable of producing high levels of terpenoids. Results Aiming to identify new gene targets which can be manipulated to increase sesquiterpene production, a set of HMG2 positive genetic interactors were assessed as single and digenic heterozygous deletions in the presence or absence of stable HMG2(K6R) overexpression. Upon single allele deletion, most genes examined led to increased sesquiterpene production in yeast cells. Tandem heterozygous deletion of a set of three genes, the ubiquitin ligases ubc7 and ssm4/doa10, and the ER resident protein pho86, led to an 11-fold increase in caryophyllene yields (125 mg/L in shake flasks) compared to cells lacking these modifications. The effect of the heterozygous deletions appears to be due to Hmg1p and Hmg2p stabilization. Conclusion Heterozygous deletions cause significant reductions in protein levels but do not lead to growth impediments frequently seen in haploid strains. By exploiting desirable haploinsufficiencies in yeast, we identified a new set of genes that can be disrupted in tandem and cause significant stabilization of Hmgp and a substantial increase in sesquiterpene production. The approach presented here allows new genetic perturbations to be compiled on yeast cell factory strains without negatively impacting cell growth and viability.
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Affiliation(s)
- Codruta Ignea
- Centre International de Hautes Etudes Agronomiques Méditerranéennes, Mediterranean Agronomic Institute of Chania, Chania 73100, Greece
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DeAngelis RA, Markiewski MM, Kourtzelis I, Rafail S, Syriga M, Sandor A, Maurya MR, Gupta S, Subramaniam S, Lambris JD. A complement-IL-4 regulatory circuit controls liver regeneration. J Immunol 2012; 188:641-8. [PMID: 22184721 PMCID: PMC3253144 DOI: 10.4049/jimmunol.1101925] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The involvement of IL-4 in liver regeneration has not yet been recognized. In this article, we show that IL-4, produced by NKT cells that accumulate in regenerating livers after partial hepatectomy, contributes to this process by regulating the activation of complement after liver resection in mice. The mechanism of this regulation was associated with the maintenance of an appropriate level of IgM in mouse blood, because IgM deposited in liver parenchyma most likely initiated complement activation during liver regeneration. By controlling complement activation, IL-4 regulated the induction of IL-6, thereby influencing a key pathway involved in regenerating liver cell proliferation and survival. Furthermore, the secretion of IL-4 was controlled by complement through the recruitment of NKT cells to regenerating livers. Our study thus reveals the existence of a regulatory feedback mechanism involving complement and IL-4 that controls liver regeneration.
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Affiliation(s)
- Robert A. DeAngelis
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Maciej M. Markiewski
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Center for Immunotherapeutic Research, Department of Biomedical Sciences, School of Pharmacy, Texas Tech University Health Science Center, Abilene, TX, USA
| | - Ioannis Kourtzelis
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Stavros Rafail
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Maria Syriga
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Adam Sandor
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Mano R. Maurya
- Department of Bioengineering, University of California, San Diego, La Jolla, CA, USA
| | - Shakti Gupta
- Department of Bioengineering, University of California, San Diego, La Jolla, CA, USA
| | - Shankar Subramaniam
- Department of Chemistry and Biochemistry, Graduate Program in Bioinformatics, and Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA, USA
| | - John D. Lambris
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
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Mitroulis I, Kambas K, Chrysanthopoulou A, Skendros P, Apostolidou E, Kourtzelis I, Drosos GI, Boumpas DT, Ritis K. Neutrophil extracellular trap formation is associated with IL-1β and autophagy-related signaling in gout. PLoS One 2011; 6:e29318. [PMID: 22195044 PMCID: PMC3241704 DOI: 10.1371/journal.pone.0029318] [Citation(s) in RCA: 280] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2011] [Accepted: 11/24/2011] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Gout is a prevalent inflammatory arthritis affecting 1-2% of adults characterized by activation of innate immune cells by monosodium urate (MSU) crystals resulting in the secretion of interleukin-1β (IL-1β). Since neutrophils play a major role in gout we sought to determine whether their activation may involve the formation of proinflammatory neutrophil extracellular traps (NETs) in relation to autophagy and IL-1β. METHODOLOGY/PRINCIPAL FINDINGS Synovial fluid neutrophils from six patients with gout crisis and peripheral blood neutrophils from six patients with acute gout and six control subjects were isolated. MSU crystals, as well as synovial fluid or serum obtained from patients with acute gout, were used for the treatment of control neutrophils. NET formation was assessed using immunofluorescence microscopy. MSU crystals or synovial fluid or serum from patients induced NET formation in control neutrophils. Importantly, NET production was observed in neutrophils isolated from synovial fluid or peripheral blood from patients with acute gout. NETs contained the alarmin high mobility group box 1 (HMGB1) supporting their pro-inflammatory potential. Inhibition of phosphatidylinositol 3-kinase signaling or phagolysosomal fusion prevented NET formation, implicating autophagy in this process. NET formation was driven at least in part by IL-1β as demonstrated by experiments involving IL-1β and its inhibitor anakinra. CONCLUSIONS/SIGNIFICANCE These findings document for the first time that activation of neutrophils in gout is associated with the formation of proinflammatory NETs and links this process to both autophagy and IL-1β. Modulation of the autophagic machinery may represent an additional therapeutic study in crystalline arthritides.
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Affiliation(s)
- Ioannis Mitroulis
- First Department of Internal Medicine, Democritus University of Thrace, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
| | - Konstantinos Kambas
- First Department of Internal Medicine, Democritus University of Thrace, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
| | - Akrivi Chrysanthopoulou
- First Department of Internal Medicine, Democritus University of Thrace, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
| | - Panagiotis Skendros
- First Department of Internal Medicine, Democritus University of Thrace, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
| | - Eirini Apostolidou
- First Department of Internal Medicine, Democritus University of Thrace, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
| | - Ioannis Kourtzelis
- First Department of Internal Medicine, Democritus University of Thrace, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
| | - Georgios I. Drosos
- Department of Orthopaedic Surgery, Democritus University of Thrace, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
| | - Dimitrios T. Boumpas
- Department of Rheumatology, Clinical Immunology and Allergy, University Hospital, Medical School, University of Crete, Heraklion, Greece
| | - Konstantinos Ritis
- First Department of Internal Medicine, Democritus University of Thrace, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
- * E-mail:
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Chrysanthopoulou A, Mitroulis I, Kambas K, Skendros P, Kourtzelis I, Vradelis S, Kolios G, Aslanidis S, Doumas M, Ritis K. Tissue factor-thrombin signaling enhances the fibrotic activity of myofibroblasts in systemic sclerosis through up-regulation of endothelin receptor A. ACTA ACUST UNITED AC 2011; 63:3586-97. [DOI: 10.1002/art.30586] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Kambas K, Chrysanthopoulou A, Kourtzelis I, Skordala M, Mitroulis I, Rafail S, Vradelis S, Sigalas I, Wu YQ, Speletas M, Kolios G, Ritis K. Endothelin-1 signaling promotes fibrosis in vitro in a bronchopulmonary dysplasia model by activating the extrinsic coagulation cascade. J Immunol 2011; 186:6568-75. [PMID: 21531894 DOI: 10.4049/jimmunol.1003756] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Neonatal respiratory distress syndrome can progress to bronchopulmonary dysplasia (BPD), a serious pulmonary fibrotic disorder. Given the involvement of the extrinsic coagulation cascade in animal models of lung fibrosis, we examined its role in BPD. We observed a higher number of neutrophils expressing tissue factor (TF) in bronchoalveolar lavage fluid (BALF) from infants with BPD than from those with uncomplicated respiratory distress syndrome together with a parallel decrease in TF and connective tissue growth factor (CTGF) in BALF supernatants during the disease course. The involvement of coagulation in the fibrotic process associated with BPD was further evaluated by treating primary human colonic myofibroblasts with BALF supernatants from infants with BPD. These human colonic myofibroblasts demonstrated an enhanced C5a- and thrombin-dependent migration. Moreover, they expressed TF in an endothelin-1-dependent manner, with subsequent activation of the extrinsic coagulation cascade and CTGF production mediated by protease-activator receptor-1 signaling. These data provide a novel mechanism for the development of BPD and indicate that endothelin-1 signaling contributes to fibrosis by upregulating a TF/thrombin amplification loop responsible for CTGF production, and offer novel and specific therapeutic targets for pulmonary fibrotic disease.
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Affiliation(s)
- Konstantinos Kambas
- First Department of Internal Medicine, Democritus University of Thrace, Alexandroupolis 68100, Greece
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Mitroulis I, Kourtzelis I, Kambas K, Chrysanthopoulou A, Ritis K. Evidence for the involvement of mTOR inhibition and basal autophagy in familial Mediterranean fever phenotype. Hum Immunol 2011; 72:135-8. [DOI: 10.1016/j.humimm.2010.11.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2010] [Revised: 10/19/2010] [Accepted: 11/08/2010] [Indexed: 11/17/2022]
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Qu H, Magotti P, Ricklin D, Wu EL, Kourtzelis I, Wu YQ, Kaznessis YN, Lambris JD. Novel analogues of the therapeutic complement inhibitor compstatin with significantly improved affinity and potency. Mol Immunol 2010; 48:481-9. [PMID: 21067811 DOI: 10.1016/j.molimm.2010.10.004] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2010] [Accepted: 10/10/2010] [Indexed: 11/26/2022]
Abstract
Compstatin is a 13-residue disulfide-bridged peptide that inhibits a key step in the activation of the human complement system. Compstatin and its derivatives have shown great promise for the treatment of many clinical disorders associated with unbalanced complement activity. To obtain more potent compstatin analogues, we have now performed an N-methylation scan of the peptide backbone and amino acid substitutions at position 13. One analogue (Ac-I[CVW(Me)QDW-Sar-AHRC](NMe)I-NH(2)) displayed a 1000-fold increase in both potency (IC(50) = 62 nM) and binding affinity for C3b (K(D) = 2.3 nM) over that of the original compstatin. Biophysical analysis using surface plasmon resonance and isothermal titration calorimetry suggests that the improved binding originates from more favorable free conformation and stronger hydrophobic interactions. This study provides a series of significantly improved drug leads for therapeutic applications in complement-related diseases, and offers new insights into the structure-activity relationships of compstatin analogues.
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Affiliation(s)
- Hongchang Qu
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
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Kourtzelis I, Markiewski MM, Doumas M, Rafail S, Kambas K, Mitroulis I, Panagoutsos S, Passadakis P, Vargemezis V, Magotti P. Complement anaphylatoxin C5a contributes to hemodialysis-associated thrombosis. Mol Immunol 2010. [DOI: 10.1016/j.molimm.2010.05.255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Qu H, Magotti P, Ricklin D, Wu EL, Kourtzelis I, Lasaosa M, Wu YQ, Lupu F, Kaznessis YN, Lambris JD. Generation of analogues of the clinical complement inhibitor compstatin with improved potency and pharmacokinetics. Mol Immunol 2010. [DOI: 10.1016/j.molimm.2010.05.270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Mitroulis I, Kourtzelis I, Kambas K, Rafail S, Chrysanthopoulou A, Speletas M, Ritis K. Regulation of the autophagic machinery in human neutrophils. Eur J Immunol 2010; 40:1461-72. [PMID: 20162553 DOI: 10.1002/eji.200940025] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The induction of the autophagy machinery, a process for the catabolism of cytosolic proteins and organelles, constitutes a crucial mechanism in innate immunity. However, the involvement of autophagy in human neutrophils and the possible inducers of this process have not been completely elucidated. In this study, the induction of autophagy was examined in human neutrophils treated with various activators and detected by the formation of acidified autophagosomes through monodansylcadaverine staining and via LC-3B conversion screened by immunoblotting and immunofluorescence confocal microscopy. In addition, the expression of the ATG genes was assessed by real-time RT-PCR. We provide evidence that autophagy is implicated in human neutrophils in both a phagocytosis-independent (rapamycin, TLR agonists, PMA) and phagocytosis (Escherichia coli)-dependent initiation manner. ROS activation is a positive mechanism for autophagy induction in the case of PMA, TLR activation and phagocytosis. Furthermore, LC3B gene expression was uniformly upregulated, indicating a transcriptional level of regulation for the autophagic machinery. This study provides a stepping stone toward further investigation of autophagy in neutrophil-driven inflammatory disorders.
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Affiliation(s)
- Ioannis Mitroulis
- First Department of Internal Medicine, Democritus University of Thrace, Alexandroupolis, Greece
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Kambas K, Mitroulis I, Kourtzelis I, Chrysanthopoulou A, Speletas M, Ritis K. Fast and reliable mutation detection of the complete exon 11-15JAK2coding region using non-isotopic RNase cleavage assay (NIRCA). Eur J Haematol 2009; 83:215-9. [DOI: 10.1111/j.1600-0609.2009.01279.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Mitroulis I, Kourtzelis I, Papadopoulos VP, Mimidis K, Speletas M, Ritis K. In vivo induction of the autophagic machinery in human bone marrow cells during Leishmania donovani complex infection. Parasitol Int 2009; 58:475-7. [PMID: 19591960 DOI: 10.1016/j.parint.2009.07.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2009] [Revised: 06/26/2009] [Accepted: 07/01/2009] [Indexed: 12/19/2022]
Abstract
Autophagy is a homeostatic process promoting cell survival in periods of stress. The induction of the autophagic machinery has also been implicated in both innate and adaptive immunity. Leishmania donovani, which is the causative pathogen of visceral leishmaniasis, is an intracellular parasite that invades and multiplies in bone marrow macrophages. We describe the induction of host cell autophagic machinery during acute natural bone marrow infection by L. donovani complex, detected by LC3B immunoblot. The successful treatment with liposomal amphotericin B resulted in the resolution of this phenomenon. Even though the role of autophagy in parasite biology has been previously studied, our findings show for the first time the in vivo host cell LC3B conversion as a marker of the induction of the autophagic machinery during infection with Leishmania parasite in real time conditions.
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Affiliation(s)
- Ioannis Mitroulis
- First Department of Internal Medicine, Democritus University of Thrace, Alexandroupolis, Greece
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Kambas K, Markiewski MM, Pneumatikos IA, Rafail SS, Theodorou V, Konstantonis D, Kourtzelis I, Doumas MN, Magotti P, DeAngelis RA, Lambris JD, Ritis KD. C5a and TNF-alpha up-regulate the expression of tissue factor in intra-alveolar neutrophils of patients with the acute respiratory distress syndrome. J Immunol 2008; 180:7368-75. [PMID: 18490736 PMCID: PMC2673518 DOI: 10.4049/jimmunol.180.11.7368] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Acute respiratory distress syndrome (ARDS) is characterized by the presence of fibrin-rich inflammatory exudates in the intra-alveolar spaces and the extensive migration of neutrophils into alveoli of the lungs. Tissue factor (TF)-dependent procoagulant properties of bronchoalveaolar lavage fluid (BALF) obtained from ARDS patients favor fibrin deposition, and are likely the result of cross-talk between inflammatory mediators and hemostatic mechanisms. However, the regulation of these interactions remains elusive. Prompted by previous findings suggesting that neutrophils, under certain inflammatory conditions, can express functional TF, we investigated the contribution of intra-alveolar neutrophils to the procoagulant properties of BALF from patients with ARDS. Our results confirm that the procoagulant properties of BALF from ARDS patients are the result of TF induction, and further indicate that BALF neutrophils are a main source of TF in intra-alveolar fluid. We also found that BALF neutrophils in these patients express significantly higher levels of TF than peripheral blood neutrophils. These results suggest that the alveolar microenvironment contributes to TF induction in ARDS. Additional experiments indicated that the ability of BALF to induce TF expression in neutrophils from healthy donors can be abolished by inhibiting C5a or TNF-alpha signaling, suggesting a primary role for these inflammatory mediators in the up-regulation of TF in alveolar neutrophils in ARDS. This cross-talk between inflammatory mediators and the induction of TF expression in intra-alveolar neutrophils may be a potential target for novel therapeutic strategies to limit ARDS-associated disturbances of coagulation.
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Affiliation(s)
- Konstantinos Kambas
- First Division of Internal Medicine, Medical School, Democritus University of Thrace, Alexandroupolis, Greece
| | - Maciej M. Markiewski
- Department of Pathology, School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
- Laboratory Medicine, School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Ioannis A. Pneumatikos
- Intensive Care Unit, Medical School, Democritus University of Thrace, Alexandroupolis, Greece
| | - Stavros S. Rafail
- First Division of Internal Medicine, Medical School, Democritus University of Thrace, Alexandroupolis, Greece
| | - Vassiliki Theodorou
- Intensive Care Unit, Medical School, Democritus University of Thrace, Alexandroupolis, Greece
| | - Dimitrios Konstantonis
- Intensive Care Unit, Medical School, Democritus University of Thrace, Alexandroupolis, Greece
| | - Ioannis Kourtzelis
- First Division of Internal Medicine, Medical School, Democritus University of Thrace, Alexandroupolis, Greece
| | - Michael N. Doumas
- First Division of Internal Medicine, Medical School, Democritus University of Thrace, Alexandroupolis, Greece
| | - Paola Magotti
- Department of Pathology, School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Robert A. DeAngelis
- Department of Pathology, School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - John D. Lambris
- Department of Pathology, School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Konstantinos D. Ritis
- First Division of Internal Medicine, Medical School, Democritus University of Thrace, Alexandroupolis, Greece
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Rafail S, Ritis K, Schaefer K, Kourtzelis I, Speletas M, Doumas M, Giaglis S, Kambas K, Konstantinides S, Kartalis G. Leptin induces the expression of functional tissue factor in human neutrophils and peripheral blood mononuclear cells through JAK2-dependent mechanisms and TNFalpha involvement. Thromb Res 2008; 122:366-75. [PMID: 18308368 DOI: 10.1016/j.thromres.2007.12.018] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2007] [Revised: 11/08/2007] [Accepted: 12/04/2007] [Indexed: 02/06/2023]
Abstract
INTRODUCTION Leptin is an adipocyte-derived cytokine primarily involved in the regulation of body weight and energy balance. In vivo studies suggest that leptin promotes platelet aggregation and thrombosis. Neutrophils are involved in the crosstalk between inflammation and thrombosis in clinical disorders. Leptin is also involved in the regulation of inflammation. AIM We examined the in vitro effects of leptin on the expression of tissue factor (TF), the primary initiator of coagulation, in healthy neutrophils. MATERIALS AND METHODS/RESULTS The effects on TF expression were assayed functionally using a modified prothrombin time (mPT), as well as at mRNA and protein levels. The same experiments were performed in parallel with PBMC. Leptin induced functional TF and increased TF mRNA and protein expression in both cell types, as determined by mPT, real-time RT-PCR, western blot, flow cytometry, immunocytochemistry. Inhibition studies revealed that the effect of leptin on TF expression is mediated, at least in part, by JAK2 and PI3K. Our findings, after neutralising TNFalpha in supernatants of leptin-treated cells, also suggest the involvement of TNFalpha in the leptin-induced TF expression in leukocytes. CONCLUSIONS This study indicates a novel link between inflammation, obesity and thrombosis by showing that leptin is able to trigger the extrinsic coagulation cascade. This work suggests a possible mechanism of the thrombotic effects of hyperleptinemic-associated clinical disorders.
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Affiliation(s)
- S Rafail
- First Division of Internal Medicine, Medical School, Democritus University of Thrace, Alexandroupolis, Greece
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