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Koukourakis IM, Platoni K, Kouloulias V, Arelaki S, Zygogianni A. Prostate Cancer Stem Cells: Biology and Treatment Implications. Int J Mol Sci 2023; 24:14890. [PMID: 37834336 PMCID: PMC10573523 DOI: 10.3390/ijms241914890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 09/30/2023] [Accepted: 10/01/2023] [Indexed: 10/15/2023] Open
Abstract
Stem cells differentiate into mature organ/tissue-specific cells at a steady pace under normal conditions, but their growth can be accelerated during the process of tissue healing or in the context of certain diseases. It is postulated that the proliferation and growth of carcinomas are sustained by the presence of a vital cellular compartment resembling stem cells residing in normal tissues: 'stem-like cancer cells' or cancer stem cells (CSCs). Mutations in prostate stem cells can lead to the formation of prostate cancer. Prostate CSCs (PCSCs) have been identified and partially characterized. These express surface markers include CD44, CD133, integrin α2β1, and pluripotency factors like OCT4, NANOG, and SOX2. Several signaling pathways are also over-activated, including Notch, PTEN/Akt/PI3K, RAS-RAF-MEK-ERK and HH. Moreover, PCSCs appear to induce resistance to radiotherapy and chemotherapy, while their presence has been linked to aggressive cancer behavior and higher relapse rates. The development of treatment policies to target PCSCs in tumors is appealing as radiotherapy and chemotherapy, through cancer cell killing, trigger tumor repopulation via activated stem cells. Thus, blocking this reactive stem cell mobilization may facilitate a positive outcome through cytotoxic treatment.
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Affiliation(s)
- Ioannis M. Koukourakis
- Radiation Oncology Unit, 1st Department of Radiology, Aretaieion Hospital, School of Medicine, National and Kapodistrian University of Athens (NKUOA), 11528 Athens, Greece; (I.M.K.); (A.Z.)
| | - Kalliopi Platoni
- Medical Physics Unit, 2nd Department of Radiology, Attikon University Hospital, School of Medicine, National and Kapodistrian University of Athens (NKUOA), 12462 Athens, Greece
| | - Vassilis Kouloulias
- Radiation Oncology Unit, 2nd Department of Radiology, School of Medicine, National and Kapodistrian University of Athens (NKUOA), 12462 Athens, Greece;
| | - Stella Arelaki
- Translational Functional Cancer Genomics, National Center for Tumor Diseases, German Cancer Research Center, 69120 Heidelberg, Germany;
| | - Anna Zygogianni
- Radiation Oncology Unit, 1st Department of Radiology, Aretaieion Hospital, School of Medicine, National and Kapodistrian University of Athens (NKUOA), 11528 Athens, Greece; (I.M.K.); (A.Z.)
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Arelaki S, Koletsa T, Sinakos E, Papadopoulos V, Arvanitakis K, Skendros P, Akriviadis E, Ritis K, Germanidis G, Hytiroglou P. Neutrophil extracellular traps enriched with IL-1β and IL-17A participate in the hepatic inflammatory process of patients with non-alcoholic steatohepatitis. Virchows Arch 2022; 481:455-465. [PMID: 35503185 DOI: 10.1007/s00428-022-03330-7] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 04/18/2022] [Accepted: 04/24/2022] [Indexed: 10/18/2022]
Abstract
Neutrophil extracellular traps (NETs) are implicated in the pathogenesis of various non-infectious inflammatory and thrombotic diseases. We investigated the presence and possible associations of NETs with various histopathologic parameters in patients with non-alcoholic steatohepatitis (NASH). We retrospectively assessed 20 liver biopsy specimens from patients with non-alcoholic fatty liver disease (NAFLD), including 17 specimens with NASH, and 14 control specimens. NETs were identified with confocal microscopy as extracellular structures with co-localization of neutrophil elastase (NE) and citrullinated histone-3. Interleukin-1β (IL-1β) and IL-17A were assessed with the same methodology. Histologic features of NAFLD were semi-quantitatively evaluated, and correlated with presence of NETs, neutrophil density, and platelet density/aggregates (assessed by immunohistochemistry for NE and CD42b, respectively). NETs were identified in 94.1% (16/17) of the NASH biopsy specimens; they were absent from all other NAFLD and control specimens. The presence of NETs was strongly correlated with steatosis (p = 0.003), ballooning degeneration (p < 0.001), lobular inflammation (p < 0.001), portal inflammation (p < 0.001), NAS score (p = 0.001), stage (p = 0.001), and diagnosis of NASH (p < 0.001). NETs were decorated with IL-1β and IL-17A. Platelet aggregates were much larger in NASH specimens, as compared to controls. In conclusion, NETs are implicated in the pathogenesis of NASH. Their associations with inflammation, ballooning degeneration (a hallmark of NASH), and stage emphasize their role in the disease process. In this setting, NETs provide a vehicle for IL-1β and IL-17A. In addition, platelet aggregation in hepatic sinusoids implies a role for thromboinflammation in NASH, and may explain the low peripheral blood platelet counts reported in patients with NASH.
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Affiliation(s)
- Stella Arelaki
- Department of Pathology, Aristotle University School of Medicine, 54006, Thessaloniki, Greece.,Laboratory of Molecular Hematology, Department of Medicine, Democritus University of Thrace, Alexandroupolis, Greece.,National Center for Tumor Diseases, Heidelberg, Germany
| | - Triantafyllia Koletsa
- Department of Pathology, Aristotle University School of Medicine, 54006, Thessaloniki, Greece
| | - Emmanuil Sinakos
- Fourth Department of Internal Medicine, Aristotle University School of Medicine, "Hippokration" General Hospital, Thessaloniki, Greece
| | | | - Konstantinos Arvanitakis
- First Department of Internal Medicine, Aristotle University School of Medicine, AHEPA University Hospital, 54636, Thessaloniki, Greece.,Basic and Translational Research Unit, Special Unit for Biomedical Research and Education (SUBRE), School of Medicine, Aristotle University, Thessaloniki, Greece
| | - Panagiotis Skendros
- Laboratory of Molecular Hematology, Department of Medicine, Democritus University of Thrace, Alexandroupolis, Greece.,First Department of Internal Medicine, Democritus University of Thrace, University Hospital of Alexandroupolis, Alexandroupolis, Greece
| | - Evangelos Akriviadis
- Fourth Department of Internal Medicine, Aristotle University School of Medicine, "Hippokration" General Hospital, Thessaloniki, Greece
| | - Konstantinos Ritis
- Laboratory of Molecular Hematology, Department of Medicine, Democritus University of Thrace, Alexandroupolis, Greece.,First Department of Internal Medicine, Democritus University of Thrace, University Hospital of Alexandroupolis, Alexandroupolis, Greece
| | - Georgios Germanidis
- First Department of Internal Medicine, Aristotle University School of Medicine, AHEPA University Hospital, 54636, Thessaloniki, Greece. .,Basic and Translational Research Unit, Special Unit for Biomedical Research and Education (SUBRE), School of Medicine, Aristotle University, Thessaloniki, Greece.
| | - Prodromos Hytiroglou
- Department of Pathology, Aristotle University School of Medicine, 54006, Thessaloniki, Greece.
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Chrysanthopoulou A, Gkaliagkousi E, Lazaridis A, Arelaki S, Pateinakis P, Ntinopoulou M, Mitsios A, Antoniadou C, Argyriou C, Georgiadis GS, Papadopoulos V, Giatromanolaki A, Ritis K, Skendros P. Angiotensin II triggers neutrophil extracellular traps release linking thromboinflammation with essential hypertension. JCI Insight 2021; 6:e148668. [PMID: 34324440 PMCID: PMC8492353 DOI: 10.1172/jci.insight.148668] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [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: 02/11/2021] [Accepted: 07/28/2021] [Indexed: 11/17/2022] Open
Abstract
Innate immunity and chronic inflammation are involved in atherosclerosis and atherothrombosis leading to target organ damage in essential hypertension (EH). However, the role of neutrophils in EH is still elusive. We investigated the association between angiotensin II (Ang II) and neutrophil extracellular traps (NETs) in pathogenesis of EH. Plasma samples, kidney biopsies and surgical specimens of abdominal aortic aneurysms (AAA) from EH patients were used. Cell-based assays, NETs/human aortic endothelial cells co-cultures and in situ studies were performed. Increased plasma levels of NETs and tissue factor (TF) activity were detected in untreated, newly-diagnosed, EH patients. Stimulation of control neutrophils with plasma from untreated EH patients generated TF-enriched NETs promoting endothelial collagen production. Ang II induced NETosis in vitro via a reactive oxygen species (ROS)/peptidylarginine deiminase type 4 and autophagy-dependent pathway. Circulating NETs and thrombin generation levels were reduced significantly in EH patients starting treatment with Ang II receptor blockers, whereas their plasma was unable to trigger procoagulant NETs. Moreover, TF-bearing NETotic neutrophils/remnants were accumulated in sites of interstitial renal fibrosis and in the subendothelial layer of AAA. These data reveal the important pathogenic role of Ang II/ROS/NETs/TF axis in EH, linking thromboinflammation with endothelial dysfunction and fibrosis.
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Affiliation(s)
- Akrivi Chrysanthopoulou
- Laboratory of Molecular Hematology, Department of Medicine, Democritus University of Thrace, Alexandroupolis, Greece
| | - Eugenia Gkaliagkousi
- Third Department of Internal Medicine, Papageorgiou General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Antonios Lazaridis
- Third Department of Internal Medicine, Papageorgiou General Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Stella Arelaki
- Translational Functional Cancer Genomics, National Center for Tumor Disease, Heidelberg, Germany
| | | | - Maria Ntinopoulou
- Laboratory of Molecular Hematology, Department of Medicine, Democritus University of Thrace, Alexandroupolis, Greece
| | - Alexandros Mitsios
- Laboratory of Molecular Hematology, Department of Medicine, Democritus University of Thrace, Alexandroupolis, Greece
| | - Christina Antoniadou
- First Department of Internal Medicine, Democritus University of Thrace, Alexandroupolis, Greece
| | - Christos Argyriou
- Department of Vascular Surgery, University Hospital of Alexandroupolis, Democritus University of Thrace, Alexandroupolis, Greece
| | - George S Georgiadis
- Department of Vascular Surgery, University Hospital of Alexandroupolis, Democritus University of Thrace, Alexandroupolis, Greece
| | - Vasileios Papadopoulos
- First Department of Internal Medicine, Democritus University of Thrace, Alexandroupolis, Greece
| | | | | | - Panagiotis Skendros
- Laboratory of Molecular Hematology, Department of Medicine, Democritus University of Thrace, Alexandroupolis, Greece
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Sivridis E, Kouroupi M, Koukourakis MI, Arelaki S, Lyratzopoulos N, Giatromanolaki A. Rheumatoid nodules in thyroid gland parenchyma as an expression of rheumatoid arthritis: a case report. J Med Case Rep 2019; 13:159. [PMID: 31133043 PMCID: PMC6537448 DOI: 10.1186/s13256-019-2113-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [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: 09/24/2018] [Accepted: 05/05/2019] [Indexed: 11/10/2022] Open
Abstract
Background The rheumatoid nodule is the most common extra-articular manifestation of rheumatoid arthritis. When present, it is readily identified in conventional hematoxylin and eosin sections. Case presentation We report a case with several rheumatoid nodules in a thyroid gland of a 33-year-old Greek woman with a 3-year history of rheumatoid arthritis treated with methotrexate, after having total thyroidectomy for hypothyroidism. Conclusion To the best of our knowledge, this is the first time that rheumatoid nodules have been encountered in the thyroid gland.
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Affiliation(s)
- Efthimios Sivridis
- Department of Pathology, Democritus University of Thrace Medical School and University General Hospital of Alexandroupolis, 68100, Alexandroupolis, Greece
| | - Maria Kouroupi
- Department of Pathology, Democritus University of Thrace Medical School and University General Hospital of Alexandroupolis, 68100, Alexandroupolis, Greece.
| | - Michael Ioannis Koukourakis
- Department of Radiotherapy/Oncology, Democritus University of Thrace Medical School and University General Hospital of Alexandroupolis, 68100, Alexandroupolis, Greece
| | - Stella Arelaki
- Department of Pathology, Democritus University of Thrace Medical School and University General Hospital of Alexandroupolis, 68100, Alexandroupolis, Greece
| | - Nikolaos Lyratzopoulos
- Department of Medicine, Democritus University of Thrace Medical School and University General Hospital of Alexandroupolis, 68100, Alexandroupolis, Greece
| | - Alexandra Giatromanolaki
- Department of Pathology, Democritus University of Thrace Medical School and University General Hospital of Alexandroupolis, 68100, Alexandroupolis, Greece
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5
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Sivridis E, Koukourakis IM, Arelaki S, Balaska K, Karpouzis A, Giatromanolaki A. Patterns of LC3A Autophagy Protein Expression in Keratoacanthomas. Head Neck Pathol 2019; 14:150-155. [PMID: 30977096 PMCID: PMC7021871 DOI: 10.1007/s12105-019-01033-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Accepted: 03/18/2019] [Indexed: 11/29/2022]
Abstract
To investigate the expression patterns of autophagy marker light chain protein 3 (LC3A) in keratoacanthoma (KA). KAs are generally regarded as benign but malignant behavior, including rare metastases, may occur. 85 KAs were assessed for the LC3A autophagic protein by immunohistochemistry. Diffuse cytoplasmic staining and a "stone-like structure" (SLS) characterized positive expression. Thirty-four out of 85 KAs (40%) had diffuse cytoplasmic LC3A immunostaining (percentage of positive cells ranging from 5 to 60%). In contrast, only 4 of the 85 KAs (4.7%) expressed SLSs. Only one SLS was detected per histologic section of each tumor. The p53 oncoprotein was encountered in all cases with expression ranging from 1 to 90% of cells (median 30%). The Ki-67 index was expressed in 63 cases (74% of cases; range 1-50% of cells; median value 5%). Neither of these two parameters nor diffuse cytoplasmic LC3A staining was significantly correlated with SLS expression or lack thereof. Expression of SLSs, a hallmark of malignancy, was found in 4.7% of KAs. Further study is necessary to determine whether this fraction represents the exceptional cases that harbor latent malignant potential.
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Affiliation(s)
- Efthimios Sivridis
- Departments of Pathology, Democritus University of Thrace Medical School and University General Hospital of Alexandroupolis, 68100 Alexandroupolis, Greece
| | - Ioannis M. Koukourakis
- Departments of Pathology, Democritus University of Thrace Medical School and University General Hospital of Alexandroupolis, 68100 Alexandroupolis, Greece
| | - Stella Arelaki
- Departments of Pathology, Democritus University of Thrace Medical School and University General Hospital of Alexandroupolis, 68100 Alexandroupolis, Greece
| | - Kostantina Balaska
- Departments of Pathology, Democritus University of Thrace Medical School and University General Hospital of Alexandroupolis, 68100 Alexandroupolis, Greece
| | - Antonios Karpouzis
- Departments of Dermatology, Democritus University of Thrace Medical School and University General Hospital of Alexandroupolis, 68100 Alexandroupolis, Greece
| | - Alexandra Giatromanolaki
- Departments of Pathology, Democritus University of Thrace Medical School and University General Hospital of Alexandroupolis, 68100 Alexandroupolis, Greece
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6
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Frangou E, Chrysanthopoulou A, Mitsios A, Kambas K, Arelaki S, Angelidou I, Arampatzioglou A, Gakiopoulou H, Bertsias GK, Verginis P, Ritis K, Boumpas DT. REDD1/autophagy pathway promotes thromboinflammation and fibrosis in human systemic lupus erythematosus (SLE) through NETs decorated with tissue factor (TF) and interleukin-17A (IL-17A). Ann Rheum Dis 2018; 78:238-248. [PMID: 30563869 PMCID: PMC6352428 DOI: 10.1136/annrheumdis-2018-213181] [Citation(s) in RCA: 135] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Revised: 10/28/2018] [Accepted: 11/01/2018] [Indexed: 12/11/2022]
Abstract
OBJECTIVES The release of neutrophil extracellular traps (NETs) represents a novel neutrophil effector function in systemic lupus erythematosus (SLE) pathogenesis. However, the molecular mechanism underlying NET release and how NETs mediate end-organ injury in SLE remain elusive. METHODS NET formation and NET-related proteins were assessed in the peripheral blood and biopsies from discoid lupus and proliferative nephritis, using immunofluorescence, immunoblotting, quantitative PCR and ELISA. Autophagy was assessed by immunofluorescence and immunoblotting. The functional effects of NETs in vitro were assessed in a primary fibroblast culture. RESULTS Neutrophils from patients with active SLE exhibited increased basal autophagy levels leading to enhanced NET release, which was inhibited in vitro by hydroxychloroquine. NETosis in SLE neutrophils correlated with increased expression of the stress-response protein REDD1. Endothelin-1 (ET-1) and hypoxia-inducible factor-1α (HIF-1α) were key mediators of REDD1-driven NETs as demonstrated by their inhibition with bosentan and L-ascorbic acid, respectively. SLE NETs were decorated with tissue factor (TF) and interleukin-17A (IL-17A), which promoted thrombin generation and the fibrotic potential of cultured skin fibroblasts. Notably, TF-bearing and IL-17A-bearing NETs were abundant in discoid skin lesions and in the glomerular and tubulointerstitial compartment of proliferative nephritis biopsy specimens. CONCLUSIONS Our data suggest the involvement of REDD1/autophagy/NET axis in end-organ injury and fibrosis in SLE, a likely candidate for repositioning of existing drugs for SLE therapy. Autophagy-mediated release of TF-bearing and IL-17A-bearing NETs provides a link between thromboinflammation and fibrosis in SLE and may account for the salutary effects of hydroxychloroquine.
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Affiliation(s)
- Eleni Frangou
- Laboratory of Immune Regulation and Tolerance, Autoimmunity and Inflammation, Biomedical Research Foundation of the Academy of Athens, Athens, Greece.,Department of Internal Medicine, Medical School, University of Cyprus, Nicosia, Cyprus.,Department of Nephrology and Transplantation, Nicosia General Hospital, Nicosia, Cyprus
| | - Akrivi Chrysanthopoulou
- Department of Internal Medicine, Laboratory of Molecular Hematology, Democritus University of Thrace, Alexandroupolis, Greece
| | - Alexandros Mitsios
- Department of Internal Medicine, Laboratory of Molecular Hematology, Democritus University of Thrace, Alexandroupolis, Greece
| | - Konstantinos Kambas
- Department of Internal Medicine, Laboratory of Molecular Hematology, Democritus University of Thrace, Alexandroupolis, Greece
| | - Stella Arelaki
- Department of Pathology, University Hospital of Alexandroupolis, Democritus University of Thrace, Alexandroupolis, Greece
| | - Iliana Angelidou
- Department of Internal Medicine, Laboratory of Molecular Hematology, Democritus University of Thrace, Alexandroupolis, Greece
| | - Athanasios Arampatzioglou
- Department of Internal Medicine, Laboratory of Molecular Hematology, Democritus University of Thrace, Alexandroupolis, Greece
| | - Hariklia Gakiopoulou
- 1st Department of Pathology, National and Kapodistrian University of Athens Medical School, Athens, Greece
| | - George K Bertsias
- Rheumatology, Clinical Immunology and Allergy, University of Crete School of Medicine, Heraklion, Greece
| | - Panayotis Verginis
- Laboratory of Immune Regulation and Tolerance, Autoimmunity and Inflammation, Biomedical Research Foundation of the Academy of Athens, Athens, Greece
| | - Konstantinos Ritis
- Department of Internal Medicine, Laboratory of Molecular Hematology, Democritus University of Thrace, Alexandroupolis, Greece.,First Department of Internal Medicine, University Hospital of Alexandroupolis, Democritus University of Thrace, Alexandroupolis, Greece
| | - Dimitrios T Boumpas
- Laboratory of Immune Regulation and Tolerance, Autoimmunity and Inflammation, Biomedical Research Foundation of the Academy of Athens, Athens, Greece .,Department of Internal Medicine, Medical School, University of Cyprus, Nicosia, Cyprus.,4th Department of Medicine, Attikon University Hospital, National and Kapodistrian University of Athens Medical School, Athens, Greece.,Joint Rheumatology Program, National and Kapodistrian University of Athens Medical School, Athens, Greece
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7
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Papagoras C, Arelaki S, Botis I, Chrysafis I, Giannopoulos S, Skendros P. Co-occurrence of Dermatomyositis and Polycythemia Unveiling Rare de Novo Neuroendocrine Prostate Tumor. Front Oncol 2018; 8:534. [PMID: 30524963 PMCID: PMC6256116 DOI: 10.3389/fonc.2018.00534] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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: 09/22/2018] [Accepted: 10/30/2018] [Indexed: 12/24/2022] Open
Abstract
We present a case of dermatomyositis together with polycythemia as initial manifestations of a particularly rare type of prostate cancer. A 69-year-old man was hospitalized for facial erythema and symptoms of fatigue. Physical evaluation, serum creatinine phosphokinase and electromyography were consistent with dermatomyositis. In parallel, the hemoglobin level was 18.5 g/dL, serum erythropoietin levels were low normal and no JAK2 mutation was found. Given a strong suspicion of a paraneoplastic syndrome the patient underwent abdominal computed tomography revealing a prostate mass, enlarged iliac lymph nodes and a fracture of L1 due to metastasis. The unusual paraneoplastic manifestations prompted a more thorough immunohistologic examination of the needle biopsy specimen taken from the prostate, which led to the diagnosis of large cell neuroendocrine prostate carcinoma. It is a most rare type of prostate cancer, carrying a poor prognosis. To our knowledge, this is the first case in the literature associating a neuroendocrine cancer of the prostate with dermatomyositis.
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Affiliation(s)
- Charalampos Papagoras
- First Department of Internal Medicine, University Hospital of Alexandroupolis, Democritus University of Thrace, Alexandroupolis, Greece
| | - Stella Arelaki
- Department of Pathology, University Hospital of Alexandroupolis, Democritus University of Thrace, Alexandroupolis, Greece
| | - Ioannis Botis
- First Department of Internal Medicine, University Hospital of Alexandroupolis, Democritus University of Thrace, Alexandroupolis, Greece
| | - Ioannis Chrysafis
- Department of Radiology, University Hospital of Alexandroupolis, Democritus University of Thrace, Alexandroupolis, Greece
| | - Stavros Giannopoulos
- Department of Urology, University Hospital of Alexandroupolis, Democritus University of Thrace, Alexandroupolis, Greece
| | - Panagiotis Skendros
- First Department of Internal Medicine, University Hospital of Alexandroupolis, Democritus University of Thrace, Alexandroupolis, Greece
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8
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Frangou E, Chrysanthopoulou A, Kambas K, Mitsios A, Arelaki S, Angelidou I, Arambatzioglou T, Gakiopoulou C, Verginis P, Ritis K, Boumpas D. FP098REDD1/AUTOPHAGY PATHWAY PROMOTES THROMBOINFLAMMATION AND FIBROSIS IN HUMAN SYSTEMIC LUPUS ERYTHEMATOSUS (SLE) BY THE RELEASE OF NEUTROPHIL EXTRACELLULAR TRAPS (NETS). Nephrol Dial Transplant 2018. [DOI: 10.1093/ndt/gfy104.fp098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Eleni Frangou
- Nephrology and Transplantation Department, Nicosia General Hospital, Nicosia, Cyprus
- Medical School, University of Cyprus, Nicosia, Cyprus
- Immunobiology lab, BRFAA, Athens, Greece
| | | | | | | | - Stella Arelaki
- Medical School, University of Thrace, Alexandroupolis, Greece
| | | | | | | | | | | | - Dimitrios Boumpas
- 4th Department of Internal Medicine, Attikon University Hospital, Chaidari, Greece
- Medical School, University of Cyprus, Nicosia, Cyprus
- Immunobiology lab, BRFAA, Athens, Greece
- Medical School, University of Athens, Athens, Greece
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9
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Angelidou I, Chrysanthopoulou A, Mitsios A, Arelaki S, Arampatzioglou A, Kambas K, Ritis D, Tsironidou V, Moschos I, Dalla V, Stakos D, Kouklakis G, Mitroulis I, Ritis K, Skendros P. REDD1/Autophagy Pathway Is Associated with Neutrophil-Driven IL-1β Inflammatory Response in Active Ulcerative Colitis. J I 2018; 200:3950-3961. [DOI: 10.4049/jimmunol.1701643] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 04/05/2018] [Indexed: 12/30/2022]
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10
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Chrysanthopoulou A, Kambas K, Stakos D, Mitroulis I, Mitsios A, Vidali V, Angelidou I, Bochenek M, Arelaki S, Arampatzioglou A, Galani IE, Skendros P, Couladouros EA, Konstantinides S, Andreakos E, Schäfer K, Ritis K. Interferon lambda1/IL-29 and inorganic polyphosphate are novel regulators of neutrophil-driven thromboinflammation. J Pathol 2017; 243:111-122. [PMID: 28678391 DOI: 10.1002/path.4935] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 06/07/2017] [Accepted: 06/27/2017] [Indexed: 12/11/2022]
Abstract
Neutrophils and neutrophil-released meshwork structures termed neutrophil extracellular traps (NETs) are major mediators of thromboinflammation and emerging targets for therapy, yet the mechanisms and pathways that control the role of neutrophils in thromboinflammation remain poorly understood. Here, we explored the role of IFN-λ1/IL-29, a major antiviral cytokine recently shown to suppress the neutrophil migratory capacity, in prothrombotic and proNETotic functions of neutrophils. In an ex vivo human experimental setting of acute ST-segment elevation myocardial infarction (STEMI), we show that IFN-λ1/IL-29 hinders NET release and diminishes the amount of cytoplasmic TF in neutrophils. Since platelet-neutrophil interaction plays a major role in NET-induced thromboinflammation, we further studied how IFN-λ1/IL-29 may interrupt this interaction. In this context, we identified inorganic polyphosphate (polyP) as a platelet-derived NET inducer in STEMI. In arterial STEMI thrombi, polyP was present in platelets and in close proximity to NET remnants. PolyP release from activated platelets was dependent on thrombin present in infarcted artery plasma, resulting in NET formation by promoting mTOR inhibition and autophagy induction. The effect of polyP on mTOR inhibition was counteracted by IFN-λ1/IL-29 treatment, leading to inhibition of NET formation. Consistently, we show in an in vivo model of FeCl3 -induced arterial thrombosis that IFN-λ2/IL-28A exerts strong antithrombotic potential. Taken together, these findings reveal a novel function of IFN-λ1/IL-29 in the suppression of thromboinflammation. Copyright © 2017 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Akrivi Chrysanthopoulou
- Laboratory of Molecular Hematology, Democritus University of Thrace, Alexandroupolis, Greece
| | - Konstantinos Kambas
- Laboratory of Molecular Hematology, Democritus University of Thrace, Alexandroupolis, Greece
| | - Dimitrios Stakos
- Laboratory of Molecular Hematology, Democritus University of Thrace, Alexandroupolis, Greece
- Cardiology Department, Democritus University of Thrace, Alexandroupolis, Greece
| | - Ioannis Mitroulis
- Department of Clinical Pathobiochemistry, and Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, Technische Universitat Dresden, Dresden, Germany
| | - Alexandros Mitsios
- Laboratory of Molecular Hematology, Democritus University of Thrace, Alexandroupolis, Greece
| | - Veroniki Vidali
- Natural Products Synthesis and Bioorganic Chemistry Laboratory, Institute of Nanoscience and Nanotechnology, NCSR 'Demokritos', Greece
| | - Iliana Angelidou
- Laboratory of Molecular Hematology, Democritus University of Thrace, Alexandroupolis, Greece
| | - Magdalena Bochenek
- Center for Cardiology, Cardiology I, University Medical Center Mainz, Mainz, Germany
| | - Stella Arelaki
- Department of Pathology, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
| | | | - Ioanna-Evdokia Galani
- Center for Clinical, Experimental Surgery and Translational Research, Biomedical Research Foundation, Athens, Greece
| | - Panagiotis Skendros
- Laboratory of Molecular Hematology, Democritus University of Thrace, Alexandroupolis, Greece
- First Department of Internal Medicine, University General Hospital of Alexandroupolis, Democritus University Thrace, Alexandroupolis, Greece
| | - Elias A Couladouros
- Natural Products Synthesis and Bioorganic Chemistry Laboratory, Institute of Nanoscience and Nanotechnology, NCSR 'Demokritos', Greece
- Chemical Laboratories, Agricultural University of Athens, Athens, Greece
| | - Stavros Konstantinides
- Cardiology Department, Democritus University of Thrace, Alexandroupolis, Greece
- Center for Thrombosis and Hemostasis, University Medical Center Mainz, Mainz, Germany
| | - Evangelos Andreakos
- Center for Clinical, Experimental Surgery and Translational Research, Biomedical Research Foundation, Athens, Greece
| | - Katrin Schäfer
- Center for Cardiology, Cardiology I, University Medical Center Mainz, Mainz, Germany
| | - Konstantinos Ritis
- Laboratory of Molecular Hematology, Democritus University of Thrace, Alexandroupolis, Greece
- First Department of Internal Medicine, University General Hospital of Alexandroupolis, Democritus University Thrace, Alexandroupolis, Greece
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11
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Abstract
Purpose/Aim: Cancer cells are addicted to glycolytic anaerobic pathways, in presence or in absence of a functional Krebs' cycle (phenomenon Warburg). This metabolic predilection relies on both extracellular (impaired vascularization and oxygenation) and intracellular (oncogenic activation of genes) causes. MATERIALS AND METHODS We investigated the expression and prognostic relevance of enzymes involved in the glucose absorption and metabolism, monocarboxylate transporter (MCT) expression, MCT1 and MCT2, pentose pathway (Glucose-6-phospahte dehydrogenase G6PD), glycogene synthesis (glycogene synthase GYS1), glycolysis (Hexokinase HXKII, phosphofructokinase PFK1, fructose biphosphate aldolase), fate of pyruvate (pyruvate dehydrogenase PDH, phosphorylated pPDH, PDH kinase PDK1, lactate dehydrogenase LDH5 and LDH1) and key Kreb's cycle enzymes (citrate synthase CSynth and isocitrate dehydrogenase IDH). RESULTS A strong overexpression of the above enzymes/proteins was noted in a varying percentage of cases examined. An interesting significant correlation between the enzymes involved in glycolysis and with the LDH5 was noted. Adenocarcinomas expressed higher levels of GLUT1 and MCT2 compared to other subtypes. Stage (p = 0.0001), aldolase (p = 0.004), LDH5 (p = 0.008), GLUT2 (p = 0.008), MCT2 (p = 0.009), GSYS1 (p = 0.04), and GLUT1 (p = 0.05) were significantly related with poor disease specific overall survival. In multivariate analysis stage (p = 0.001), LDH5 (p = 0.04), pPDH (p = 0.04), and aldolase (p = 0.04) were independent prognostic variables. CONCLUSION It is concluded that an orchestrated activation of glucose absorption and metabolism towards anaerobic pathways characterize the majority of NSCLC, and this phenotype is strongly linked with an aggressive clinical behavior. This glycolytic addiction of lung cancer cell is revealed as a key therapeutic target.
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Affiliation(s)
- Alexandra Giatromanolaki
- a Department of Pathology , Democritus University of Thrace , Alexandroupolis , Greece.,b University Hospital of Alexandroupolis , Alexandroupolis , Greece
| | - Efthimios Sivridis
- a Department of Pathology , Democritus University of Thrace , Alexandroupolis , Greece.,b University Hospital of Alexandroupolis , Alexandroupolis , Greece
| | - Stella Arelaki
- a Department of Pathology , Democritus University of Thrace , Alexandroupolis , Greece.,b University Hospital of Alexandroupolis , Alexandroupolis , Greece
| | - Michael I Koukourakis
- b University Hospital of Alexandroupolis , Alexandroupolis , Greece.,c Department of Radiotherapy/Oncology , Democritus University of Thrace , Alexandroupolis , Greece
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12
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Giatromanolaki A, Liousia M, Arelaki S, Kalamida D, Pouliliou S, Mitrakas A, Tsolou A, Sivridis E, Koukourakis M. Differential effect of hypoxia and acidity on lung cancer cell and fibroblast metabolism. Biochem Cell Biol 2017; 95:428-436. [PMID: 28177758 DOI: 10.1139/bcb-2016-0197] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
This study examined the metabolic response of lung cancer cells and normal lung fibroblasts to hypoxia and acidity. GLUT1 and HXKII mRNA/protein expression was up-regulated under hypoxia in the MRC5 fibroblasts and in the A549 and H1299 lung cancer cell lines, indicating intensified glucose absorption and glycolysis. Under hypoxia, the LDHA mRNA and LDH5 protein levels increased in the cancer cells but not in the fibroblasts. Acidity suppressed the above-mentioned hypoxia effect. PDH-kinase-1 (PDK1 mRNA and protein) and inactive phosphorylated-PDH protein levels were induced under hypoxia in the cancer cells, whereas these were reduced in the MRC5 lung fibroblasts. In human tissue sections, the prevalent expression patterns supported the contrasting metabolic behavior of cancer cells vs. tumor fibroblasts. The monocarboxylate/lactate transporter 1 (MCT1) was up-regulated in all the cell lines under hypoxic conditions, but it was suppressed under acidic conditions. The mitochondrial DNA (mtDNA) content per cell decreased significantly in the A549 cancer cell line under hypoxia, but it increased in the MRC5 fibroblasts. Taking into account these findings, we suggest that, under hypoxia, cancer cells intensify the anaerobic direction in glycolysis, while normal fibroblasts prefer to seek energy by intensifying the aerobic use of the available oxygen.
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Affiliation(s)
- Alexandra Giatromanolaki
- a Department of Pathology, Democritus University of Thrace, and University General Hospital of Alexandroupolis, Alexandroupolis 68100, Greece
| | - Maria Liousia
- b Department of Radiotherapy/Oncology, Democritus University of Thrace, and University General Hospital of Alexandroupolis, Alexandroupolis 68100, Greece
| | - Stella Arelaki
- a Department of Pathology, Democritus University of Thrace, and University General Hospital of Alexandroupolis, Alexandroupolis 68100, Greece
| | - Dimitra Kalamida
- b Department of Radiotherapy/Oncology, Democritus University of Thrace, and University General Hospital of Alexandroupolis, Alexandroupolis 68100, Greece
| | - Stamatia Pouliliou
- b Department of Radiotherapy/Oncology, Democritus University of Thrace, and University General Hospital of Alexandroupolis, Alexandroupolis 68100, Greece
| | - Achilleas Mitrakas
- b Department of Radiotherapy/Oncology, Democritus University of Thrace, and University General Hospital of Alexandroupolis, Alexandroupolis 68100, Greece
| | - Avgi Tsolou
- b Department of Radiotherapy/Oncology, Democritus University of Thrace, and University General Hospital of Alexandroupolis, Alexandroupolis 68100, Greece
| | - Efthimios Sivridis
- a Department of Pathology, Democritus University of Thrace, and University General Hospital of Alexandroupolis, Alexandroupolis 68100, Greece
| | - Michael Koukourakis
- b Department of Radiotherapy/Oncology, Democritus University of Thrace, and University General Hospital of Alexandroupolis, Alexandroupolis 68100, Greece
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13
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Mitsios A, Arampatzioglou A, Arelaki S, Mitroulis I, Ritis K. NETopathies? Unraveling the Dark Side of Old Diseases through Neutrophils. Front Immunol 2017; 7:678. [PMID: 28123386 PMCID: PMC5225098 DOI: 10.3389/fimmu.2016.00678] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [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: 08/24/2016] [Accepted: 12/21/2016] [Indexed: 12/14/2022] Open
Abstract
Neutrophil extracellular traps (NETs) were initially described as an antimicrobial mechanism of neutrophils. Over the last decade, several lines of evidence support the involvement of NETs in a plethora of pathological conditions. Clinical and experimental data indicate that NET release constitutes a shared mechanism, which is involved in a different degree in various manifestations of non-infectious diseases. Even though the backbone of NETs is similar, there are differences in their protein load in different diseases, which represent alterations in neutrophil protein expression in distinct disorder-specific microenvironments. The characterization of NET protein load in different NET-driven disorders could be of significant diagnostic and/or therapeutic value. Additionally, it will provide further evidence for the role of NETs in disease pathogenesis, and it will enable the characterization of disorders in which neutrophils and NET-dependent inflammation are of critical importance.
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Affiliation(s)
- Alexandros Mitsios
- Laboratory of Molecular Hematology, Democritus University of Thrace , Alexandroupolis , Greece
| | | | - Stella Arelaki
- Laboratory of Molecular Hematology, Democritus University of Thrace, Alexandroupolis, Greece; Department of Pathology, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
| | - Ioannis Mitroulis
- Department of Clinical Pathobiochemistry, Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine Technische Universität Dresden , Dresden , Germany
| | - Konstantinos Ritis
- Laboratory of Molecular Hematology, Democritus University of Thrace, Alexandroupolis, Greece; First Department of Internal Medicine, University Hospital of Alexandroupolis, Democritus University of Thrace, Alexandroupolis, Greece
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Stakos DA, Kambas K, Konstantinidis T, Mitroulis I, Apostolidou E, Arelaki S, Tsironidou V, Giatromanolaki A, Skendros P, Konstantinides S, Ritis K. Expression of functional tissue factor by neutrophil extracellular traps in culprit artery of acute myocardial infarction. Eur Heart J 2015; 36:1405-14. [PMID: 25660055 PMCID: PMC4458286 DOI: 10.1093/eurheartj/ehv007] [Citation(s) in RCA: 281] [Impact Index Per Article: 31.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Accepted: 01/07/2015] [Indexed: 12/29/2022] Open
Abstract
Neutrophils are involved in the pathophysiology of infracted coronary arteries in STEMI via NET structures. Platelets, activated by thrombin, are required for NET formation, while the integrity of NET scaffold contributes to the functionality of NET-bound TF. The blockage of NET formation or local neutralization of NET-mediated TF signalling constitutes candidate therapeutic targets. Aims Neutrophil extracellular traps (NETs) are chromatin filaments released by activated polymorphonuclear neutrophils (PMNs) and decorated with granule proteins with various properties. Several lines of evidence implicate NETs in thrombosis. The functional significance and the in vivo relevance of NETs during atherothrombosis in humans have not been addressed until now. Methods and results Selective sampling of thrombotic material and surrounding blood from the infarct-related coronary artery (IRA) and the non-IRA was performed during primary percutaneous revascularization in 18 patients with ST-segment elevation acute myocardial infarction (STEMI). Thrombi isolated from IRA contained PMNs and NETs decorated with tissue factor (TF). Although TF was expressed intracellularly in circulating PMNs of STEMI patients, active TF was specifically exposed by NETs obtained from the site of plaque rupture. Treatment of NET structures with DNase I abolished TF functionality measurement. In vitro treatment of control PMNs with plasma obtained from IRA and non-IRA was further shown to induce intracellular up-regulation of TF but not NET formation. A second step consisting of the interaction between PMNs and thrombin-activated platelets was required for NET generation and subsequent TF exposure. Conclusion The interaction of thrombin-activated platelets with PMNs at the site of plaque rupture during acute STEMI results in local NET formation and delivery of active TF. The notion that NETs represent a mechanism by which PMNs release thrombogenic signals during atherothrombosis may offer novel therapeutic targets.
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Affiliation(s)
- Dimitrios A Stakos
- Cardiology Department, Democritus University of Thrace, Alexandroupolis, Greece
| | - Konstantinos Kambas
- Laboratory of Molecular Hematology, Democritus University of Thrace, Alexandroupolis, Greece
| | | | - Ioannis Mitroulis
- Department of Clinical Pathobiochemistry, and Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine Technische Universität Dresden, Dresden, Germany
| | - Eirini Apostolidou
- Laboratory of Molecular Hematology, Democritus University of Thrace, Alexandroupolis, Greece
| | - Stella Arelaki
- Department of Pathology, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
| | - Victoria Tsironidou
- Laboratory of Molecular Hematology, Democritus University of Thrace, Alexandroupolis, Greece
| | - Alexandra Giatromanolaki
- Department of Pathology, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
| | - Panagiotis Skendros
- Laboratory of Molecular Hematology, Democritus University of Thrace, Alexandroupolis, Greece
| | - Stavros Konstantinides
- Cardiology Department, Democritus University of Thrace, Alexandroupolis, Greece Center for Thrombosis and Hemostasis, University Medical Center Mainz, Mainz, Germany
| | - Konstantinos Ritis
- Laboratory of Molecular Hematology, Democritus University of Thrace, Alexandroupolis, Greece
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15
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Chrysanthopoulou A, Mitroulis I, Apostolidou E, Arelaki S, Mikroulis D, Konstantinidis T, Sivridis E, Koffa M, Giatromanolaki A, Boumpas DT, Ritis K, Kambas K. Neutrophil extracellular traps promote differentiation and function of fibroblasts. J Pathol 2014; 233:294-307. [PMID: 24740698 DOI: 10.1002/path.4359] [Citation(s) in RCA: 227] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 04/02/2014] [Accepted: 04/07/2014] [Indexed: 12/19/2022]
Abstract
Neutrophil activation by inflammatory stimuli and the release of extracellular chromatin structures (neutrophil extracellular traps - NETs) have been implicated in inflammatory disorders. Herein, we demonstrate that NETs released by neutrophils treated either with fibrosis-related agents, such as cigarette smoke, magnesium silicate, bleomycin, or with generic NET inducers, such as phorbol 12-myristate 13-acetate, induced activation of lung fibroblasts (LFs) and differentiation into myofibroblast (MF) phenotype. Interestingly, the aforementioned agents or IL-17 (a primary initiator of inflammation/fibrosis) had no direct effect on LF activation and differentiation. MFs treated with NETs demonstrated increased connective tissue growth factor expression, collagen production, and proliferation/migration. These fibrotic effects were significantly decreased after degradation of NETs with DNase1, heparin or myeloperoxidase inhibitor, indicating the key role of NET-derived components in LF differentiation and function. Furthermore, IL-17 was expressed in NETs and promoted the fibrotic activity of differentiated LFs but not their differentiation, suggesting that priming by DNA and histones is essential for IL-17-driven fibrosis. Additionally, autophagy was identified as the orchestrator of NET formation, as shown by inhibition studies using bafilomycin A1 or wortmannin. The above findings were further supported by the detection of NETs in close proximity to alpha-smooth muscle actin (α-SMA)-expressing fibroblasts in biopsies from patients with fibrotic interstitial lung disease or from skin scar tissue. Together, these data suggest that both autophagy and NETs are involved not only in inflammation but also in the ensuing fibrosis and thus may represent potential therapeutic targets in human fibrotic diseases.
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Affiliation(s)
- Akrivi Chrysanthopoulou
- Laboratory of Molecular Hematology, Democritus University of Thrace, Alexandroupolis, Greece
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Kambas K, Chrysanthopoulou A, Vassilopoulos D, Apostolidou E, Skendros P, Girod A, Arelaki S, Froudarakis M, Nakopoulou L, Giatromanolaki A, Sidiropoulos P, Koffa M, Boumpas DT, Ritis K, Mitroulis I. Tissue factor expression in neutrophil extracellular traps and neutrophil derived microparticles in antineutrophil cytoplasmic antibody associated vasculitis may promote thromboinflammation and the thrombophilic state associated with the disease. Ann Rheum Dis 2013; 73:1854-63. [PMID: 23873874 DOI: 10.1136/annrheumdis-2013-203430] [Citation(s) in RCA: 193] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
OBJECTIVES Antineutrophil cytoplasmic antibody (ANCA) associated vasculitis (AAV) is characterised by neutrophil activation. An elevated prevalence of venous thromboembolic events has been reported in AAV. Because of the critical role of neutrophils in inflammation associated thrombosis, we asked whether neutrophil tissue factor (TF) may be implicated in the thrombotic diathesis in AAV. METHODS Neutrophils from four patients and sera from 17 patients with ANCA associated vasculitis with active disease and remission were studied. TF expression was assessed by immunoblotting and confocal microscopy. Circulating DNA levels were evaluated. TF expressing microparticles (MPs) were measured by flow cytometry and thrombin-antithrombin complex levels by ELISA. RESULTS Peripheral blood neutrophils from four patients with active disease expressed elevated TF levels and released TF expressing neutrophil extracellular traps (NETs) and MPs. TF positive NETs were released by neutrophils isolated from the bronchoalveolar lavage and were detected in nasal and renal biopsy specimens. Elevated levels of circulating DNA and TF expressing neutrophil derived MPs were further observed in sera from patients with active disease. Induction of remission attenuated the aforementioned effects. Control neutrophils treated with sera from patients with active disease released TF bearing NETs and MPs which were abolished after IgG depletion. Treatment of control neutrophils with isolated IgG from sera from patients with active disease also resulted in the release of TF bearing NETs. TF implication in MP dependent thrombin generation was demonstrated by antibody neutralisation studies. CONCLUSIONS Expression of TF in NETs and neutrophil derived MPs proposes a novel mechanism for the induction of thrombosis and inflammation in active AAV.
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Affiliation(s)
- Konstantinos Kambas
- Laboratory of Molecular Haematology, Democritus University of Thrace, Alexandroupolis, Greece
| | - Akrivi Chrysanthopoulou
- Laboratory of Molecular Haematology, Democritus University of Thrace, Alexandroupolis, Greece
| | - Dimitrios Vassilopoulos
- Second Department of Medicine, Athens University School of Medicine, Hippokration General Hospital, Athens, Greece
| | - Eirini Apostolidou
- Laboratory of Molecular Haematology, Democritus University of Thrace, Alexandroupolis, Greece
| | - Panagiotis Skendros
- First Department of Internal Medicine, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
| | - Andreas Girod
- Life Sciences Research Unit-FSTC, University of Luxembourg, Walferdange, Luxembourg
| | - Stella Arelaki
- Laboratory of Molecular Haematology, Democritus University of Thrace, Alexandroupolis, Greece
| | - Marios Froudarakis
- Department of Pneumonology, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
| | - Lydia Nakopoulou
- First Department of Pathology, Medical School, University of Athens, Athens, Greece
| | - Alexandra Giatromanolaki
- Department of Pathology, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
| | - Prodromos Sidiropoulos
- Department of Rheumatology, Clinical Immunology and Allergy, University Hospital, Medical School, University of Crete, Heraklion, Greece
| | - Maria Koffa
- Laboratory of Cellular and Molecular Biology, Department of Molecular Biology and Genetics, Democritus University of Thrace, Alexandroupolis, Greece
| | - Dimitrios T Boumpas
- Third Department of Internal Medicine, National University of Athens Medical School, Sotiria Hospital, Athens, Greece Biomedical Research Foundation of Academy of Athens, Centre for Immunology and Transplantations, Athens, Greece
| | - Konstantinos Ritis
- Laboratory of Molecular Haematology, Democritus University of Thrace, Alexandroupolis, Greece First Department of Internal Medicine, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
| | - Ioannis Mitroulis
- Laboratory of Molecular Haematology, Democritus University of Thrace, Alexandroupolis, Greece First Department of Internal Medicine, University General Hospital of Alexandroupolis, Alexandroupolis, Greece Department of Internal Medicine III, Division of Vascular Inflammation, Diabetes and Kidney, University Clinic Carl-Gustav-Carus, University of Dresden, Dresden, Germany
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17
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Mitroulis I, Kambas K, Chrysanthopoulou A, Vassilopoulos D, Apostolidou E, Skendros P, Girod A, Arelaki S, Froudarakis M, Giatromanolaki A, Sidiropoulos P, Koffa M, Boumpas DT, Ritis K. THU0051 Tissue Factor Expression in Neutrophil Extracellular Traps in Patients with Active ANCA Associated Vasculitis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.579] [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: 11/03/2022]
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