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Tsagiopoulou M, Chapaprieta V, Russiñol N, García-Torre B, Pechlivanis N, Nadeu F, Papakonstantinou N, Stavroyianni N, Chatzidimitriou A, Psomopoulos F, Campo E, Stamatopoulos K, Martín-Subero JI. Chromatin activation profiling of stereotyped chronic lymphocytic leukemias reveals a subset 8-specific signature. Blood 2023; 141:2955-2960. [PMID: 36989492 DOI: 10.1182/blood.2022016587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 02/17/2023] [Accepted: 03/02/2023] [Indexed: 03/31/2023] Open
Abstract
The chromatin activation landscape of chronic lymphocytic leukemia (CLL) with stereotyped B-cell receptor immunoglobulin is currently unknown. In this study, we report the results of a whole-genome chromatin profiling of histone 3 lysine 27 acetylation of 22 CLLs from major subsets, which were compared against nonstereotyped CLLs and normal B-cell subpopulations. Although subsets 1, 2, and 4 did not differ much from their nonstereotyped CLL counterparts, subset 8 displayed a remarkably distinct chromatin activation profile. In particular, we identified 209 de novo active regulatory elements in this subset, which showed similar patterns with U-CLLs undergoing Richter transformation. These regions were enriched for binding sites of 9 overexpressed transcription factors. In 78 of 209 regions, we identified 113 candidate overexpressed target genes, 11 regions being associated with more than 2 adjacent genes. These included blocks of up to 7 genes, suggesting local coupregulation within the same genome compartment. Our findings further underscore the uniqueness of subset 8 CLL, notable for the highest risk of Richter's transformation among all CLLs and provide additional clues to decipher the molecular basis of its clinical behavior.
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Affiliation(s)
- Maria Tsagiopoulou
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece
- Centro Nacional de Análisis Genómico, Centre for Genomic Regulation, Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Vicente Chapaprieta
- Institut d'Investigacions Biomèdiques August Pi i Sunyer, Universitat de Barcelona, Barcelona, Spain
| | - Nuria Russiñol
- Institut d'Investigacions Biomèdiques August Pi i Sunyer, Universitat de Barcelona, Barcelona, Spain
| | - Beatriz García-Torre
- Institut d'Investigacions Biomèdiques August Pi i Sunyer, Universitat de Barcelona, Barcelona, Spain
| | - Nikolaos Pechlivanis
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece
| | - Ferran Nadeu
- Institut d'Investigacions Biomèdiques August Pi i Sunyer, Universitat de Barcelona, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Cáncer, Spain
| | - Nikos Papakonstantinou
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece
| | - Niki Stavroyianni
- Hematology Department and HCT Unit, G. Papanicolaou Hospital, Thessaloniki, Greece
| | | | - Fotis Psomopoulos
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece
| | - Elías Campo
- Institut d'Investigacions Biomèdiques August Pi i Sunyer, Universitat de Barcelona, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Cáncer, Spain
- Departamento de Fundamentos Clínicos, Universitat de Barcelona, Barcelona, Spain
| | - Kostas Stamatopoulos
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece
| | - José Ignacio Martín-Subero
- Institut d'Investigacions Biomèdiques August Pi i Sunyer, Universitat de Barcelona, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Cáncer, Spain
- Departamento de Fundamentos Clínicos, Universitat de Barcelona, Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain
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Kanakakis I, Stafylas P, Tsigkas G, Nikas D, Synetos A, Avramidis D, Tsiafoutis I, Dagre A, Tzikas S, Latsios G, Patsourakos N, Sanidas I, Skalidis E, Pipilis A, Bamidis P, Davlouros P, Kanakakis I, Tselegkidi M, Sertedaki E, Mamarelis I, Fraggos E, Mantzouranis E, Karvounis C, Manolis A, Chatzilymperis G, Chiotelis I, Gryllis D, Poulimenos L, Triantafyllis A, Alexopoulos D, Varlamos C, Almpanis G, Aggeli A, Sakkas A, Trikas A, Tsiamis S, Triantafylloy K, Mpenia D, Oikonomou D, Papadopoulou E, Avramidis D, Kousta M, Moulianitaki E, Poulianitis G, Mavrou G, Latsios G, Synetos A, Tousoulis D, Kafkas N, Godwin S, Mertzanos G, Koytouzis M, Tsiafoutis I, Papadopoulos A, Tsoumeleas A, Barbetseas I, Sanidas I, Athanasiou A, Paizis I, Kakkavas A, Papafanis T, Mantas I, Neroutsos G, Gkoliopoulou A, Tafrali V, Diakakis G, Grammatikopoulos K, Sinanis T, Kartalis A, Afendoulis D, Voutas P, Kardamis C, Doulis A, Kalantzis N, Vergis K, Chasikidis C, Armatas G, Damelou A, Ntogka M, Serafetinidis I, Zagkas K, Tselempis T, Makridis P, Karantoumanis I, Karapatsoudi E, Oikonomou K, Foukarakis E, Kafarakis P, Pitarokoilis M, Rogdakis E, Stavrakis S, Koudounis G, Karampetsos V, Lionakis N, Panotopoulos C, Svoronos D, Tsorlalis I, Tsatiris K, Beneki E, Papadopoulos N, Sawafta A, Kozatsani D, Spyromitros G, Bostanitis I, Dimitriadis G, Nikoloulis N, Kampouridis N, Giampatzis V, Patsilinakos S, Andrikou E, Katsiadas N, Papanagnou G, Kotsakis A, Ioannidis E, Platogiannis N, Psychari S, Pissimissis E, Gavrielatos G, Maritsa D, Papakonstantinou N, Patsourakos N, Oikonomou G, Katsanou K, Lazaris E, Moschos N, Giakoumakis T, Papagiannis N, Goudis C, Daios S, Devliotis K, Dimitriadis F, Giannadaki M, Savvidis M, Tsinopoulos G, Zarifis I, Askalidou T, Vasileiadis I, Kleitsiotou P, Sidiropoulos S, Tsaousidis A, Tzikas S, Vassilikos V, Papadopoulos C, Zarvalis Ε, Gogos C, Moschovidis V, Styliadis I, Laschos V, Spathoulas K, Vogiatzis I, Kasmeridis C, Papadopoulos A, Pittas S, Sdogkos E, Dagre A, Mpounas P, Rodis I, Pipilis A, Konstantinidis S, Makrygiannis S, Masdrakis A, Magginas A, Sevastos G, Katsimagklis G, Skalidis E, Petousis S, Davlouros P, Tsigkas G, Hahalis G, Koufou E, Tziakas D, Chalikias G, Thomaidi A, Stakos D, Chotidis A, Nikas D, Sakellariou X, Skoularigkis I, Dimos A, Iakovis N, Mpourazana A, Zagouras A, Lygkouri G, Bamidis P, Lagakis P, Spachos D, Stafylas P, Chalitsios C, Karaiskou M, Tychala C. Epidemiology, reperfusion management and outcomes of patients with myocardial infarction in Greece: The ILIAKTIS study. Hellenic J Cardiol 2022; 67:1-8. [DOI: 10.1016/j.hjc.2022.03.003] [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] [Received: 07/21/2021] [Revised: 01/20/2022] [Accepted: 03/08/2022] [Indexed: 11/26/2022] Open
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Kanellos I, Vasilakopoulos V, Daios S, Lampropoulos S, Petridou M, Kapos I, Konstantinidis D, Papakonstantinou N, Kaiafa G, Savopoulos C. The impact of nationwide lockdown on acute coronary syndromes hospitalization rate in the Western Macedonia regional hospital of Greece. European Heart Journal. Acute Cardiovascular Care 2021. [PMCID: PMC8135310 DOI: 10.1093/ehjacc/zuab020.088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Funding Acknowledgements Type of funding sources: None. Introduction World Health Organization declared the Covid-19 outbreak a global pandemic on March 11, 2020. The pandemic is associated with more than 75 million cases and more than 1.5 million deaths worldwide. Greece implemented a nationwide lockdown on March 23, 2020, to control the pandemic wave and prevent reducing morbidity and mortality due to Covid-19. During this period, acute coronary syndromes (ACS) hospitalization in the cardiology department was reduced. In addition, the second pandemic wave also led to a new national lockdown on November 7, 2020, although it was implemented 15 days earlier in the relative regional hospital area due to high viral load. Purpose Our study evaluated the number of hospitalized patients with ACS during the nationwide lockdown period, comparing them with the previous years (period 2018 and 2019). Material and Methods Data recordings regarding ACS (unstable angina, NSTEMI, STEMI) hospitalization rates in the Cardiology department were collected from the hospital"s register. Each year"s data analysis interval included the periods of the nationwide lockdown of 2020; March 23 to May 3 and October 14 to December 10. Statistical analysis was performed between periodic groups using the chi-square test (IBM SPSS Statistics software, version 23.0). Results During 2018, the number of patients hospitalized for ACS was 81 and consisted of 39,1% of the total hospitalizations in the Cardiology Department. In 2019 the number of patients hospitalized for ACS was 62 and consisted the 48,8% of the total hospitalizations, while in 2020, the number of patients hospitalized for ACS was 30 and consisted the 27,5% of the total hospitalizations. Furthermore, there was a statistically significant difference (p < 0,05) regarding ACS event hospitalization rate between the period of lockdown (March to May and October-December 2020) and the COVID-19-free period of the previous year (March to May and October to December 2019). There was no statistically significant difference (p > 0,05) regarding ACS event hospitalization rate between the period of lockdown (March to May and October to December 2020) and the COVID-19-free period of the year 2018 (March to May and October to December). Finally, there was no statistically significant difference (p > 0,05) in ACS event hospitalization rate between March to May and October to December regarding the years 2018 and 2019. Conclusion Our results are in compliance with the ESC"s comparative survey regarding the observed worldwide reduction of hospitalizations for ACS during the COVID-19 lockdown era, suggesting a potential impact of lockdown in both non-environmental and environmental risk factors for cardiovascular disease. Factors of the relative epidemiological reduction are complexed and puzzled, while morbidity and mortality of ACS remained relatively stable even after the lockdown, so future studies are necessary to further investigate them.
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Affiliation(s)
- I Kanellos
- Aristotle University of Thessaloniki, First Propedeutic Department of Internal Medicine, AHEPA UNIVERSITY HOSPITAL, Thessaloniki, Greece
| | | | - S Daios
- Aristotle University of Thessaloniki, First Propedeutic Department of Internal Medicine, AHEPA UNIVERSITY HOSPITAL, Thessaloniki, Greece
| | - S Lampropoulos
- Kozani General Hospital, Cardiology Department, Kozani, Greece
| | - M Petridou
- Aristotle University of Thessaloniki, First Propedeutic Department of Internal Medicine, AHEPA UNIVERSITY HOSPITAL, Thessaloniki, Greece
| | - I Kapos
- University Hospital Zurich, Department of Cardiology, Zurich, Switzerland
| | - D Konstantinidis
- Aristotle University of Thessaloniki, First Propedeutic Department of Internal Medicine, AHEPA UNIVERSITY HOSPITAL, Thessaloniki, Greece
| | - N Papakonstantinou
- Pyhrn-Eisenwurzen Klinikum Steyr, Department of Cardiology, Steyr, Austria
| | - G Kaiafa
- Aristotle University of Thessaloniki, First Propedeutic Department of Internal Medicine, AHEPA UNIVERSITY HOSPITAL, Thessaloniki, Greece
| | - C Savopoulos
- Aristotle University of Thessaloniki, First Propedeutic Department of Internal Medicine, AHEPA UNIVERSITY HOSPITAL, Thessaloniki, Greece
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Böttcher M, Bruns H, Völkl S, Lu J, Chartomatsidou E, Papakonstantinou N, Mentz K, Büttner-Herold M, Zenz T, Herling M, Huber W, Ghia P, Stamatopoulos K, Mackensen A, Mougiakakos D. Control of PD-L1 expression in CLL-cells by stromal triggering of the Notch-c-Myc-EZH2 oncogenic signaling axis. J Immunother Cancer 2021; 9:e001889. [PMID: 33931470 PMCID: PMC8098943 DOI: 10.1136/jitc-2020-001889] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/26/2021] [Indexed: 12/04/2022] Open
Abstract
Chronic lymphocytic leukemia (CLL) is the most common leukemia in adults. Emerging data suggest that CLL-cells efficiently evade immunosurveillance. T-cell deficiencies in CLL include immuno(metabolic) exhaustion that is achieved by inhibitory molecules, with programmed cell death 1/programmed cell death ligand 1 (PD-L1) signaling emerging as a major underlying mechanism. Moreover, CLL-cells are characterized by a close and recurrent interaction with their stromal niches in the bone marrow and lymph nodes. Here, they receive nurturing signals within a well-protected environment. We could previously show that the interaction of CLL-cells with stroma leads to c-Myc activation that is followed by metabolic adaptations. Recent data indicate that c-Myc also controls expression of the immune checkpoint molecule PD-L1. Therefore, we sought out to determine the role of stromal contact for the CLL-cells' PD-L1 expression and thus their immuno-evasive phenotype.To do so, we analyzed PD-L1 expression on CLL cell (subsets) in untreated patients and on healthy donor-derived B-cells. Impact of stromal contact on PD-L1 expression on CLL-cells and the underlying signaling pathways were assessed in well-established in vitro niche models. Ex vivo and in vitro findings were validated in the Eµ-TCL1 transgenic CLL mouse model.We found increased PD-L1 expression on CLL-cells as compared with B-cells that was further enhanced in a cell-to-cell contact-dependent manner by stromal cells. In fact, circulating recent stromal-niche emigrants displayed higher PD-L1 levels than long-time circulating CLL-cells. Using our in vitro niche model, we show that a novel Notch-c-Myc-enhancer of zeste homolog 2 (EZH2) signaling axis controls PD-L1 upregulation. Ultimately, elevated PD-L1 levels conferred increased resistance towards activated autologous T-cells.In summary, our findings support the notion that the CLL microenvironment contributes to immune escape variants. In addition, several targetable molecules (eg, Notch or EZH2) could be exploited in view of improving immune responses in patients with CLL, which warrants further in-depth investigation.
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MESH Headings
- Animals
- B7-H1 Antigen/genetics
- B7-H1 Antigen/metabolism
- Case-Control Studies
- Cell Line
- Coculture Techniques
- Enhancer of Zeste Homolog 2 Protein/metabolism
- Gene Expression Regulation, Leukemic
- Humans
- Leukemia, Lymphocytic, Chronic, B-Cell/genetics
- Leukemia, Lymphocytic, Chronic, B-Cell/immunology
- Leukemia, Lymphocytic, Chronic, B-Cell/metabolism
- Lymphocyte Activation
- Mice, Inbred C57BL
- Mice, Transgenic
- Paracrine Communication
- Proto-Oncogene Proteins c-myc/metabolism
- Receptors, Notch/metabolism
- Signal Transduction
- Stromal Cells/immunology
- Stromal Cells/metabolism
- T-Lymphocytes/immunology
- T-Lymphocytes/metabolism
- Tumor Cells, Cultured
- Tumor Escape
- Tumor Microenvironment
- Mice
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Affiliation(s)
- Martin Böttcher
- Department of Internal Medicine 5 for Hematology and Oncology, Universitätsklinikum Erlangen, Erlangen, Bayern, Germany
| | - Heiko Bruns
- Department of Internal Medicine 5 for Hematology and Oncology, Universitätsklinikum Erlangen, Erlangen, Bayern, Germany
| | - Simon Völkl
- Department of Internal Medicine 5 for Hematology and Oncology, Universitätsklinikum Erlangen, Erlangen, Bayern, Germany
| | - Junyan Lu
- Genome Biology Unit, EMBL, Heidelberg, Baden-Württemberg, Germany
| | - Elisavet Chartomatsidou
- Division of Experimental Oncology and Department of Onco-Hematology, IRCCS Ospedale San Raffaele, Milano, Lombardia, Italy
| | - Nikos Papakonstantinou
- Institute of Applied Biosciences, Centre for Research and Technology-Hellas, Thessaloniki, Central Macedonia, Greece
| | - Kristin Mentz
- Department of Internal Medicine 5 for Hematology and Oncology, Universitätsklinikum Erlangen, Erlangen, Bayern, Germany
| | - Maike Büttner-Herold
- Department of Nephropathology, Institute of Pathology, Universitätsklinikum Erlangen, Erlangen, Bayern, Germany
| | - Thorsten Zenz
- Department of Medical Oncology and Hematology, UniversitätsSpital Zürich, Zurich, Switzerland
| | - Marco Herling
- Department I of Internal Medicine, CMMC, CECAD, CIO-ABCD, University of Cologne, Köln, Nordrhein-Westfalen, Germany
| | - Wolfgang Huber
- Genome Biology Unit, EMBL, Heidelberg, Baden-Württemberg, Germany
| | - Paolo Ghia
- Division of Experimental Oncology and Department of Onco-Hematology, IRCCS Ospedale San Raffaele, Milano, Lombardia, Italy
| | - Kostas Stamatopoulos
- Institute of Applied Biosciences, Centre for Research and Technology-Hellas, Thessaloniki, Central Macedonia, Greece
| | - Andreas Mackensen
- Department of Internal Medicine 5 for Hematology and Oncology, Universitätsklinikum Erlangen, Erlangen, Bayern, Germany
| | - Dimitrios Mougiakakos
- Department of Internal Medicine 5 for Hematology and Oncology, Universitätsklinikum Erlangen, Erlangen, Bayern, Germany
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Gavriilidis GI, Ntoufa S, Papakonstantinou N, Kotta K, Koletsa T, Chartomatsidou E, Moysiadis T, Stavroyianni N, Anagnostopoulos A, Papadaki E, Tsiftsoglou AS, Stamatopoulos K. Stem cell factor is implicated in microenvironmental interactions and cellular dynamics of chronic lymphocytic leukemia. Haematologica 2021; 106:692-700. [PMID: 32336682 PMCID: PMC7927890 DOI: 10.3324/haematol.2019.236513] [Citation(s) in RCA: 2] [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: 08/29/2019] [Indexed: 01/03/2023] Open
Abstract
The inflammatory cytokine stem cell factor (SCF, ligand of c-kit receptor)
has been implicated as a pro-oncogenic driver and an adverse
prognosticator in several human cancers. Increased SCF levels have
recently been reported in a small series of patients with chronic lymphocytic
leukemia (CLL), however its precise role in CLL pathophysiology
remains elusive. In this study, CLL cells were found to express predominantly
the membrane isoform of SCF, which is known to elicit a more
robust activation of the c-kit receptor. SCF was significantly overexpressed
in CLL cells compared to healthy tonsillar B cells and it correlated with
adverse prognostic biomarkers, shorter time-to-first treatment and shorter
overall survival. Activation of immune receptors and long-term cell-cell
interactions with the mesenchymal stroma led to an elevation of SCF primarily
in CLL cases with an adverse prognosis. Contrariwise, suppression
of oxidative stress and the BTK inhibitor ibrutinib lowered SCF levels.
Interestingly, SCF significantly correlated with mitochondrial dynamics
and hypoxia-inducible factor-1a which have previously been linked with
clinical aggressiveness in CLL. SCF was able to elicit direct biological
effects in CLL cells, affecting redox homeostasis and cell proliferation.
Overall, the aberrantly expressed SCF in CLL cells emerges as a key
response regulator to microenvironmental stimuli while correlating with
poor prognosis. On these grounds, specific targeting of this inflammatory
molecule could serve as a novel therapeutic approach in CLL.
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Affiliation(s)
- George I Gavriilidis
- Laboratory of Pharmacology, School of Pharmacy, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Stavroula Ntoufa
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece
| | - Nikos Papakonstantinou
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece
| | - Konstantia Kotta
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece
| | - Triantafyllia Koletsa
- Department of Pathology, Faculty of Medicine, Aristotle University, Thessaloniki, Greece
| | - Elisavet Chartomatsidou
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece
| | - Theodoros Moysiadis
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece,Department of Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden
| | - Niki Stavroyianni
- Hematology Department and HCT Unit, G. Papanicolaou Hospital, Thessaloniki, Greece
| | | | - Eleni Papadaki
- Department of Medicine, University of Crete, Heraklion, Greece
| | - Asterios S Tsiftsoglou
- Laboratory of Pharmacology, School of Pharmacy, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Kostas Stamatopoulos
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece,Department of Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden
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6
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Tsagiopoulou M, Chapaprieta V, Duran-Ferrer M, Moysiadi T, Psomopoulos F, Kollia P, Papakonstantinou N, Campo E, Stamatopoulos K, Martin-Subero JI. Chronic lymphocytic leukemias with trisomy 12 show a distinct DNA methylation profile linked to altered chromatin activation. Haematologica 2020; 105:2864-2867. [PMID: 33256389 PMCID: PMC7716362 DOI: 10.3324/haematol.2019.240721] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Maria Tsagiopoulou
- Institute of Applied Biosciences, Center for Research and Technology Hellas, Thessaloniki, Greece
- Department of Biology, National and Kapodistrian University of Athens, Athens, Greece
| | - Vicente Chapaprieta
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Universitat de Barcelona, Barcelona, Spain
| | - Martí Duran-Ferrer
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Universitat de Barcelona, Barcelona, Spain
| | - Theodoros Moysiadi
- Institute of Applied Biosciences, Center for Research and Technology Hellas, Thessaloniki, Greece
- Department of Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden
| | - Fotis Psomopoulos
- Institute of Applied Biosciences, Center for Research and Technology Hellas, Thessaloniki, Greece
- Department of Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden
| | - Panagoula Kollia
- Department of Biology, National and Kapodistrian University of Athens, Athens, Greece
| | - Nikos Papakonstantinou
- Institute of Applied Biosciences, Center for Research and Technology Hellas, Thessaloniki, Greece
| | - Elias Campo
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Universitat de Barcelona, Barcelona, Spain
- Departamento de Fundamentos Clínicos, Universitat de Barcelona, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain
| | - Kiostas Stamatopoulos
- Institute of Applied Biosciences, Center for Research and Technology Hellas, Thessaloniki, Greece
- Department of Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden
| | - Jose I. Martin-Subero
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Universitat de Barcelona, Barcelona, Spain
- Departamento de Fundamentos Clínicos, Universitat de Barcelona, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain
- Institució Catalana de Recerca I Estudis Avançats (ICREA), Barcelona, Spain
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7
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Velegraki M, Papakonstantinou N, Kalaitzaki L, Ntoufa S, Laidou S, Tsagiopoulou M, Bizymi N, Damianaki A, Mavroudi I, Pontikoglou C, Papadaki HA. Increased proportion and altered properties of intermediate monocytes in the peripheral blood of patients with lower risk Myelodysplastic Syndrome. Blood Cells Mol Dis 2020; 86:102507. [PMID: 33032166 DOI: 10.1016/j.bcmd.2020.102507] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 08/13/2020] [Revised: 09/20/2020] [Accepted: 09/23/2020] [Indexed: 11/17/2022]
Abstract
Immune deregulation has a critical role in the pathogenesis of lower risk myelodysplastic syndromes (MDS). The cells of the macrophage/monocyte lineage have been reported to contribute to the inflammatory process in MDS through impaired phagocytosis of the apoptotic hemopoietic cells and abnormal production of cytokines. In the present study we assessed the number of peripheral blood (PB) monocyte subsets, namely the classical CD14bright/CD16-, intermediate CD14bright/CD16+ and non-classical CD14dim/CD16+ cells, in patients with lower risk (low/intermediate-I) MDS (n = 32). We also assessed the production of tumor necrosis factor (TNF)α by patient PB monocytes in response to immune stimulus as well as their transcriptome profile. Compared to age- and sex-matched healthy individuals (n = 19), MDS patients had significantly lower number of classical and increased number of intermediate monocytes. Patient intermediate monocytes displayed increased production of TNFα following stimulation with lipopolysaccharide, compared to healthy individuals. Transcriptional profiling comparison of CD16+ monocytes from patients and controls revealed 43 differentially expressed genes mostly associated with biological pathways/processes relevant to hemopoiesis, immune signaling and cell adhesion. These data provide evidence for the first-time that distinct monocyte subsets display abnormal quantitative and functional characteristics in lower risk MDS substantiating their role in the immune deregulation associated with the disease.
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Affiliation(s)
- Maria Velegraki
- Hemopoiesis Research Laboratory, School of Medicine, University of Crete and Department of Hematology, University Hospital of Heraklion, Heraklion, Greece
| | - Nikos Papakonstantinou
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece
| | - Lydia Kalaitzaki
- Hemopoiesis Research Laboratory, School of Medicine, University of Crete and Department of Hematology, University Hospital of Heraklion, Heraklion, Greece
| | - Stavroula Ntoufa
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece
| | - Stamatia Laidou
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece
| | - Maria Tsagiopoulou
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece
| | - Nikoleta Bizymi
- Hemopoiesis Research Laboratory, School of Medicine, University of Crete and Department of Hematology, University Hospital of Heraklion, Heraklion, Greece
| | - Athina Damianaki
- Hemopoiesis Research Laboratory, School of Medicine, University of Crete and Department of Hematology, University Hospital of Heraklion, Heraklion, Greece
| | - Irene Mavroudi
- Hemopoiesis Research Laboratory, School of Medicine, University of Crete and Department of Hematology, University Hospital of Heraklion, Heraklion, Greece
| | - Charalampos Pontikoglou
- Hemopoiesis Research Laboratory, School of Medicine, University of Crete and Department of Hematology, University Hospital of Heraklion, Heraklion, Greece
| | - Helen A Papadaki
- Hemopoiesis Research Laboratory, School of Medicine, University of Crete and Department of Hematology, University Hospital of Heraklion, Heraklion, Greece.
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8
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Malousi A, Kouidou S, Tsagiopoulou M, Papakonstantinou N, Bouras E, Georgiou E, Tzimagiorgis G, Stamatopoulos K. MeinteR: A framework to prioritize DNA methylation aberrations based on conformational and cis-regulatory element enrichment. Sci Rep 2019; 9:19148. [PMID: 31844073 PMCID: PMC6915744 DOI: 10.1038/s41598-019-55453-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 07/01/2019] [Accepted: 11/19/2019] [Indexed: 12/16/2022] Open
Abstract
DNA methylation studies have been reformed with the advent of single-base resolution arrays and bisulfite sequencing methods, enabling deeper investigation of methylation-mediated mechanisms. In addition to these advancements, numerous bioinformatics tools address important computational challenges, covering DNA methylation calling up to multi-modal interpretative analyses. However, contrary to the analytical frameworks that detect driver mutational signatures, the identification of putatively actionable epigenetic events remains an unmet need. The present work describes a novel computational framework, called MeinteR, that prioritizes critical DNA methylation events based on the following hypothesis: critical aberrations of DNA methylation more likely occur on a genomic substrate that is enriched in cis-acting regulatory elements with distinct structural characteristics, rather than in genomic “deserts”. In this context, the framework incorporates functional cis-elements, e.g. transcription factor binding sites, tentative splice sites, as well as conformational features, such as G-quadruplexes and palindromes, to identify critical epigenetic aberrations with potential implications on transcriptional regulation. The evaluation on multiple, public cancer datasets revealed significant associations between the highest-ranking loci with gene expression and known driver genes, enabling for the first time the computational identification of high impact epigenetic changes based on high-throughput DNA methylation data.
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Affiliation(s)
- Andigoni Malousi
- Lab. of Biological Chemistry, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece.
| | - Sofia Kouidou
- Lab. of Biological Chemistry, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Maria Tsagiopoulou
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece
| | - Nikos Papakonstantinou
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece
| | - Emmanouil Bouras
- Lab. of Hygiene, Social-Preventive Medicine & Medical Statistics, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Elisavet Georgiou
- Lab. of Biological Chemistry, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Georgios Tzimagiorgis
- Lab. of Biological Chemistry, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Kostas Stamatopoulos
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece
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9
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Tsagiopoulou M, Papakonstantinou N, Moysiadis T, Mansouri L, Ljungström V, Duran-Ferrer M, Malousi A, Queirós AC, Plevova K, Bhoi S, Kollia P, Oscier D, Anagnostopoulos A, Trentin L, Ritgen M, Pospisilova S, Stavroyianni N, Ghia P, Martin-Subero JI, Pott C, Rosenquist R, Stamatopoulos K. DNA methylation profiles in chronic lymphocytic leukemia patients treated with chemoimmunotherapy. Clin Epigenetics 2019; 11:177. [PMID: 31791414 PMCID: PMC6889736 DOI: 10.1186/s13148-019-0783-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [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: 09/24/2019] [Accepted: 11/19/2019] [Indexed: 01/01/2023] Open
Abstract
Background In order to gain insight into the contribution of DNA methylation to disease progression of chronic lymphocytic leukemia (CLL), using 450K Illumina arrays, we determined the DNA methylation profiles in paired pre-treatment/relapse samples from 34 CLL patients treated with chemoimmunotherapy, mostly (n = 31) with the fludarabine-cyclophosphamide-rituximab (FCR) regimen. Results The extent of identified changes in CLL cells versus memory B cells from healthy donors was termed “epigenetic burden” (EB) whereas the number of changes between the pre-treatment versus the relapse sample was termed “relapse changes” (RC). Significant (p < 0.05) associations were identified between (i) high EB and short time-to-first-treatment (TTFT); and, (ii) few RCs and short time-to-relapse. Both the EB and the RC clustered in specific genomic regions and chromatin states, including regulatory regions containing binding sites of transcription factors implicated in B cell and CLL biology. Conclusions Overall, we show that DNA methylation in CLL follows different dynamics in response to chemoimmunotherapy. These epigenetic alterations were linked with specific clinical and biological features.
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Affiliation(s)
- Maria Tsagiopoulou
- Institute of Applied Biosciences, Center for Research and Technology Hellas, 6th km Charilaou-Thermi Rd, 57001, Thermi, Thessaloniki, GR, Greece.,Department of Biology, National and Kapodistrian University of Athens, Athens, Greece
| | - Nikos Papakonstantinou
- Institute of Applied Biosciences, Center for Research and Technology Hellas, 6th km Charilaou-Thermi Rd, 57001, Thermi, Thessaloniki, GR, Greece
| | - Theodoros Moysiadis
- Institute of Applied Biosciences, Center for Research and Technology Hellas, 6th km Charilaou-Thermi Rd, 57001, Thermi, Thessaloniki, GR, Greece.,Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Larry Mansouri
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden.,Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Viktor Ljungström
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Martí Duran-Ferrer
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Departamento de Fundamentos Clínicos, Universitat de Barcelona, Barcelona, Spain
| | - Andigoni Malousi
- Laboratory of Biological Chemistry, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Ana C Queirós
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Departamento de Fundamentos Clínicos, Universitat de Barcelona, Barcelona, Spain
| | - Karla Plevova
- Department of Internal Medicine-Hematology and Oncology, University Hospital Brno and Medical Faculty of Masaryk University, Brno, Czech Republic.,Central European Institute of Technology, Masaryk University, Brno, Czech Republic
| | - Sujata Bhoi
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Panagoula Kollia
- Department of Biology, National and Kapodistrian University of Athens, Athens, Greece
| | - David Oscier
- Department of Haematology, Royal Bournemouth Hospital, Bournemouth, UK
| | | | - Livio Trentin
- Department of Medicine, Hematology and Clinical Immunology Branch, Padua University School of Medicine, Padua, Italy
| | - Matthias Ritgen
- Second Medical Department, University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Sarka Pospisilova
- Department of Internal Medicine-Hematology and Oncology, University Hospital Brno and Medical Faculty of Masaryk University, Brno, Czech Republic.,Central European Institute of Technology, Masaryk University, Brno, Czech Republic
| | - Niki Stavroyianni
- Hematology Department and HCT Unit, G. Papanicolaou Hospital, Thessaloniki, Greece
| | - Paolo Ghia
- Division of Experimental Oncology and Department of Onco-Hematology, IRCCS San Raffaele Scientific Institute and Università Vita-Salute San Raffaele, Milan, Italy
| | - Jose I Martin-Subero
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Departamento de Fundamentos Clínicos, Universitat de Barcelona, Barcelona, Spain.,Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
| | - Christiane Pott
- Second Medical Department, University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Richard Rosenquist
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Kostas Stamatopoulos
- Institute of Applied Biosciences, Center for Research and Technology Hellas, 6th km Charilaou-Thermi Rd, 57001, Thermi, Thessaloniki, GR, Greece. .,Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden.
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10
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Zeymer U, Ludman P, Danchin N, Kala P, Maggioni AP, Weidinger F, Gale CP, Beleslin B, Budaj A, Chioncel O, Dagres N, Danchin N, Emberson J, Erlinge D, Glikson M, Gray A, Kayikcioglu M, Maggioni AP, Nagy VK, Nedoshivin A, Petronio AS, Roos-Hesselink J, Wallentin L, Zeymer U, Weidinger F, Zeymer U, Danchin N, Ludman P, Sinnaeve P, Kala P, Ferrari R, Maggioni AP, Goda A, Zelveian P, Weidinger F, Karamfilov K, Motovska Z, Zeymer U, Raungaard B, Marandi T, Shaheen SM, Lidon RM, Karjalainen PP, Kereselidze Z, Alexopoulos D, Becker D, Quinn M, Iakobishvili Z, Al-Farhan H, Sadeghi M, Caporale R, Romeo F, Mirrakhimov E, Serpytis P, Erglis A, Kedev S, Balbi MM, Moore AM, Dudek D, Legutko J, Mimoso J, Tatu-Chitoiu G, Stojkovic S, Shlyakhto E, AlHabib KF, Bunc M, Studencan M, Mourali MS, Bajraktari G, Konte M, Larras F, Lefrancq EF, Mekhaldi S, Laroche C, Maggioni AP, Goda A, Shuka N, Pavli E, Tafaj E, Gishto T, Dibra A, Duka A, Gjana A, Kristo A, Knuti G, Demiraj A, Dado E, Hasimi E, Simoni L, Siqeca M, Sisakian H, Hayrapetyan H, Markosyan S, Galustyan L, Arustamyan N, Kzhdryan H, Pepoyan S, Zirkik A, Von Lewinski D, Paetzold S, Kienzl I, Matyas K, Neunteufl T, Nikfardjam M, Neuhold U, Mihalcz A, Glaser F, Steinwender C, Reiter C, Grund M, Hrncic D, Hoppe U, Hammerer M, Hinterbuchner L, Hengstenberg C, Delle Karth G, Lang I, Weidinger F, Winkler W, Hasun M, Kastner J, Havel C, Derntl M, Oberegger G, Hajos J, Adlbrecht C, Publig T, Leitgeb MC, Wilfing R, Jirak P, Ho CY, Puskas L, Schrutka L, Spinar J, Parenica J, Hlinomaz O, Fendrychova V, Semenka J, Sikora J, Sitar J, Groch L, Rezek M, Novak M, Kramarikova P, Stasek J, Dusek J, Zdrahal P, Polasek R, Karasek J, Seiner J, Sukova N, Varvarovsky I, Lazarák T, Novotny V, Matejka J, Rokyta R, Volovar S, Belohlavek J, Motovska Z, Siranec M, Kamenik M, Kralik R, Raungaard B, Ravkilde J, Jensen SE, Villadsen A, Villefrance K, Schmidt Skov C, Maeng M, Moeller K, Hasan-Ali H, Ahmed TA, Hassan M, ElGuindy A, Farouk Ismail M, Ibrahim Abd El-Aal A, El-sayed Gaafar A, Magdy Hassan H, Ahmed Shafie M, Nabil El-khouly M, Bendary A, Darwish M, Ahmed Y, Amin O, AbdElHakim A, Abosaif K, Kandil H, Galal MAG, El Hefny EE, El Sayed M, Aly K, Mokarrab M, Osman M, Abdelhamid M, Mantawy S, Ali MR, Kaky SD, Khalil VA, Saraya MEA, Talaat A, Nabil M, Mounir WM, Mahmoud K, Aransa A, Kazamel G, Anwar S, Al-Habbaa A, Abd el Monem M, Ismael A, Amin Abu-Sheaishaa M, Abd Rabou MM, Hammouda TMA, Moaaz M, Elkhashab K, Ragab T, Rashwan A, Rmdan A, AbdelRazek G, Ebeid H, Soliman Ghareeb H, Farag N, Zaki M, Seleem M, Torki A, Youssef M, AlLah Nasser NA, Rafaat A, Selim H, Makram MM, Khayyal M, Malasi K, Madkour A, Kolib M, Alkady H, Nagah H, Yossef M, Wafa A, Mahfouz E, Faheem G, Magdy Moris M, Ragab A, Ghazal M, Mabrouk A, Hassan M, El-Masry M, Naseem M, Samir S, Marandi T, Reinmets J, Allvee M, Saar A, Ainla T, Vaide A, Kisseljova M, Pakosta U, Eha J, Lotamois K, Sia J, Myllymaki J, Pinola T, Karjalainen PP, Paana T, Mikkelsson J, Ampio M, Tsivilasvili J, Zurab P, Kereselidze Z, Agladze R, Melia A, Gogoberidze D, Khubua N, Totladze L, Metreveli I, Chikovani A, Eitel I, Pöss J, Werner M, Constantz A, Ahrens C, Zeymer U, Tolksdorf H, Klinger S, Sack S, Heer T, Lekakis J, Kanakakis I, Xenogiannis I, Ermidou K, Makris N, Ntalianis A, Katsaros F, Revi E, Kafkala K, Mihelakis E, Diakakis G, Grammatikopoulos K, Voutsinos D, Alexopoulos D, Xanthopoulou I, Mplani V, Foussas S, Papakonstantinou N, Patsourakos N, Dimopoulos A, Derventzis A, Athanasiou K, Vassilikos VP, Papadopoulos C, Tzikas S, Vogiatzis I, Datsios A, Galitsianos I, Koutsampasopoulos K, Grigoriadis S, Douras A, Baka N, Spathis S, Kyrlidis T, Hatzinikolaou H, Kiss RG, Becker D, Nowotta F, Tóth K, Szabó S, Lakatos C, Jambrik Z, Ruzsa J, Ruzsa Z, Róna S, Toth J, Vargane Kosik A, Toth KSB, Nagy GG, Ondrejkó Z, Körömi Z, Botos B, Pourmoghadas M, Salehi A, Massoumi G, Sadeghi M, Soleimani A, Sarrafzadegan N, Roohafza H, Azarm M, Mirmohammadsadeghi A, Rajabi D, Rahmani Y, Siabani S, Najafi F, Hamzeh B, Karim H, Siabani H, Saleh N, Charehjoo H, Zamzam L, Al-Temimi G, Al-Farhan H, Al-Yassin A, Mohammad A, Ridha A, Al-Saedi G, Atabi N, Sabbar O, Mahmood S, Dakhil Z, Yaseen IF, Almyahi M, Alkenzawi H, Alkinani T, Alyacopy A, Kearney P, Twomey K, Iakobishvili Z, Shlomo N, Beigel R, Caldarola P, Rutigliano D, Sublimi Saponetti L, Locuratolo N, Palumbo V, Scherillo M, Formigli D, Canova P, Musumeci G, Roncali F, Metra M, Lombardi C, Visco E, Rossi L, Meloni L, Montisci R, Pippia V, Marchetti MF, Congia M, Cacace C, Luca G, Boscarelli G, Indolfi C, Ambrosio G, Mongiardo A, Spaccarotella C, De Rosa S, Canino G, Critelli C, Caporale R, Chiappetta D, Battista F, Gabrielli D, Marziali A, Bernabò P, Navazio A, Guerri E, Manca F, Gobbi M, Oreto G, Andò G, Carerj S, Saporito F, Cimmino M, Rigo F, Zuin G, Tuccillo B, Scotto di Uccio F, Irace L, Lorenzoni G, Meloni I, Merella P, Polizzi GM, Pino R, Marzilli M, Morrone D, Caravelli P, Orsini E, Mosa S, Piovaccari G, Santarelli A, Cavazza C, Romeo F, Fedele F, Mancone M, Straito M, Salvi N, Scarparo P, Severino P, Razzini C, Massaro G, Cinque A, Gaudio C, Barillà F, Torromeo C, Porco L, Mei M, Iorio R, Nassiacos D, Barco B, Sinagra G, Falco L, Priolo L, Perkan A, Strana M, Bajraktari G, Percuku L, Berisha G, Mziu B, Beishenkulov M, Abdurashidova T, Toktosunova A, Kaliev K, Serpytis P, Serpytis R, Butkute E, Lizaitis M, Broslavskyte M, Xuereb RG, Moore AM, Mercieca Balbi M, Paris E, Buttigieg L, Musial W, Dobrzycki S, Dubicki A, Kazimierczyk E, Tycinska A, Wojakowski W, Kalanska-Lukasik B, Ochala A, Wanha W, Dworowy S, Sielski J, Janion M, Janion-Sadowska A, Dudek D, Wojtasik-Bakalarz J, Bryniarski L, Peruga JZ, Jonczyk M, Jankowski L, Klecha A, Legutko J, Michalowska J, Brzezinski M, Kozmik T, Kowalczyk T, Adamczuk J, Maliszewski M, Kuziemka P, Plaza P, Jaros A, Pawelec A, Sledz J, Bartus S, Zmuda W, Bogusz M, Wisnicki M, Szastak G, Adamczyk M, Suska M, Czunko P, Opolski G, Kochman J, Tomaniak M, Miernik S, Paczwa K, Witkowski A, Opolski MP, Staruch AD, Kalarus Z, Honisz G, Mencel G, Swierad M, Podolecki T, Marques J, Azevedo P, Pereira MA, Gaspar A, Monteiro S, Goncalves F, Leite L, Mimoso J, Manuel Lopes dos Santos W, Amado J, Pereira D, Silva B, Caires G, Neto M, Rodrigues R, Correia A, Freitas D, Lourenco A, Ferreira F, Sousa F, Portugues J, Calvo L, Almeida F, Alves M, Silva A, Caria R, Seixo F, Militaru C, Ionica E, Tatu-Chitoiu G, Istratoaie O, Florescu M, Lipnitckaia E, Osipova O, Konstantinov S, Bukatov V, Vinokur T, Egorova E, Nefedova E, Levashov S, Gorbunova A, Redkina M, Karaulovskaya N, Bijieva F, Babich N, Smirnova O, Filyanin R, Eseva S, Kutluev A, Chlopenova A, Shtanko A, Kuppar E, Shaekhmurzina E, Ibragimova M, Mullahmetova M, Chepisova M, Kuzminykh M, Betkaraeva M, Namitokov A, Khasanov N, Baleeva L, Galeeva Z, Magamedkerimova F, Ivantsov E, Tavlueva E, Kochergina A, Sedykh D, Kosmachova E, Skibitskiy V, Porodenko N, Namitokov A, Litovka K, Ulbasheva E, Niculina S, Petrova M, Harkov E, Tsybulskaya N, Lobanova A, Chernova A, Kuskaeva A, Kuskaev A, Ruda M, Zateyshchikov D, Gilarov M, Konstantinova E, Koroleva O, Averkova A, Zhukova N, Kalimullin D, Borovkova N, Tokareva A, Buyanova M, Khaisheva L, Pirozhenko A, Novikova T, Yakovlev A, Tyurina T, Lapshin K, Moroshkina N, Kiseleva M, Fedorova S, Krylova L, Duplyakov D, Semenova Y, Rusina A, Ryabov V, Syrkina A, Demianov S, Reitblat O, Artemchuk A, Efremova E, Makeeva E, Menzorov M, Shutov A, Klimova N, Shevchenko I, Elistratova O, Kostyuckova O, Islamov R, Budyak V, Ponomareva E, Ullah Jan U, Alshehri AM, Sedky E, Alsihati Z, Mimish L, Selem A, Malik A, Majeed O, Altnji I, AlShehri M, Aref A, AlHabib K, AlDosary M, Tayel S, Abd AlRahman M, Asfina KN, Abdin Hussein G, Butt M, Markovic Nikolic N, Obradovic S, Djenic N, Brajovic M, Davidovic A, Romanovic R, Novakovic V, Dekleva M, Spasic M, Dzudovic B, Jovic Z, Cvijanovic D, Veljkovic S, Ivanov I, Cankovic M, Jarakovic M, Kovacevic M, Trajkovic M, Mitov V, Jovic A, Hudec M, Gombasky M, Sumbal J, Bohm A, Baranova E, Kovar F, Samos M, Podoba J, Kurray P, Obona T, Remenarikova A, Kollarik B, Verebova D, Kardosova G, Studencan M, Alusik D, Macakova J, Kozlej M, Bayes-Genis A, Sionis A, Garcia Garcia C, Lidon RM, Duran Cambra A, Labata Salvador C, Rueda Sobella F, Sans Rosello J, Vila Perales M, Oliveras Vila T, Ferrer Massot M, Bañeras J, Lekuona I, Zugazabeitia G, Fernandez-Ortiz A, Viana Tejedor A, Ferrera C, Alvarez V, Diaz-Castro O, Agra-Bermejo RM, Gonzalez-Cambeiro C, Gonzalez-Babarro E, Domingo-Del Valle J, Royuela N, Burgos V, Canteli A, Castrillo C, Cobo M, Ruiz M, Abu-Assi E, Garcia Acuna JM. The ESC ACCA EAPCI EORP acute coronary syndrome ST-elevation myocardial infarction registry. European Heart Journal - Quality of Care and Clinical Outcomes 2019; 6:100-104. [DOI: 10.1093/ehjqcco/qcz042] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Accepted: 07/24/2019] [Indexed: 12/20/2022]
Abstract
Abstract
Aims
The Acute Cardiac Care Association (ACCA)–European Association of Percutaneous Coronary Intervention (EAPCI) Registry on ST-elevation myocardial infarction (STEMI) of the EurObservational programme (EORP) of the European Society of Cardiology (ESC) registry aimed to determine the current state of the use of reperfusion therapy in ESC member and ESC affiliated countries and the adherence to ESC STEMI guidelines in patients with STEMI.
Methods and results
Between 1 January 2015 and 31 March 2018, a total of 11 462 patients admitted with an initial diagnosis of STEMI according to the 2012 ESC STEMI guidelines were enrolled. Individual patient data were collected across 196 centres and 29 countries. Among the centres, there were 136 percutaneous coronary intervention centres and 91 with cardiac surgery on-site. The majority of centres (129/196) were part of a STEMI network. The main objective of this study was to describe the demographic, clinical, and angiographic characteristics of patients with STEMI. Other objectives include to assess management patterns and in particular the current use of reperfusion therapies and to evaluate how recommendations of most recent STEMI European guidelines regarding reperfusion therapies and adjunctive pharmacological and non-pharmacological treatments are adopted in clinical practice and how their application can impact on patients’ outcomes. Patients will be followed for 1 year after admission.
Conclusion
The ESC ACCA-EAPCI EORP ACS STEMI registry is an international registry of care and outcomes of patients hospitalized with STEMI. It will provide insights into the contemporary patient profile, management patterns, and 1-year outcome of patients with STEMI.
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Affiliation(s)
- Uwe Zeymer
- Hospital of the City of Ludwigshafen, Medical Clinic B and Institute of Heart Attack Research, Ludwigshafen on the Rhine, Germany
| | - Peter Ludman
- Institute of Cardiovascular Sciences, Birmingham University, Birmingham, UK
| | - Nicolas Danchin
- Cardiology Department, Georges Pompidou European Hospital, Paris, France
| | - Petr Kala
- Internal Cardiology Department, University Hospital Brno, Czech Republic
| | - Aldo P Maggioni
- EURObservational Research Programme, ESC, Sophia Antipolis, France
- ANMCO Research Center, Florence, Italy
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11
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Kosalai ST, Morsy MHA, Papakonstantinou N, Mansouri L, Stavroyianni N, Kanduri C, Stamatopoulos K, Rosenquist R, Kanduri M. EZH2 upregulates the PI3K/AKT pathway through IGF1R and MYC in clinically aggressive chronic lymphocytic leukaemia. Epigenetics 2019; 14:1125-1140. [PMID: 31216925 PMCID: PMC6773411 DOI: 10.1080/15592294.2019.1633867] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [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] [Indexed: 12/11/2022] Open
Abstract
EZH2 is overexpressed in poor-prognostic chronic lymphocytic leukaemia (CLL) cases, acting as an oncogene; however, thus far, the EZH2 target genes in CLL have not been disclosed. In this study, using ChIP-sequencing, we identified EZH2 and H3K27me3 target genes in two prognostic subgroups of CLL with distinct prognosis and outcome, i.e., cases with unmutated (U-CLL, n = 6) or mutated IGHV genes (M-CLL, n = 6). While the majority of oncogenic pathways were equally enriched for EZH2 target genes in both prognostic subgroups, PI3K pathway genes were differentially bound by EZH2 in U-CLL versus M-CLL. The occupancy of EZH2 for selected PI3K pathway target genes was validated in additional CLL samples (n = 16) and CLL cell lines using siRNA-mediated EZH2 downregulation and ChIP assays. Intriguingly, we found that EZH2 directly binds to the IGF1R promoter along with MYC and upregulates IGF1R expression in U-CLL, leading to downstream PI3K activation. By investigating an independent CLL cohort (n = 96), a positive correlation was observed between EZH2 and IGF1R expression with higher levels in U-CLL compared to M-CLL. Accordingly, siRNA-mediated downregulation of either EZH2, MYC or IGF1R and treatment with EZH2 and MYC pharmacological inhibitors in the HG3 CLL cell line induced a significant reduction in PI3K pathway activation. In conclusion, we characterize for the first time EZH2 target genes in CLL revealing a hitherto unknown implication of EZH2 in modulating the PI3K pathway in a non-canonical, PRC2-independent way, with potential therapeutic implications considering that PI3K inhibitors are effective therapeutic agents for CLL.
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Affiliation(s)
- Subazini Thankaswamy Kosalai
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg , Gothenburg , Sweden
| | | | - Nikos Papakonstantinou
- Institute of Applied Biosciences, Center for Research and Technology Hellas , Thessaloniki , Greece
| | - Larry Mansouri
- Department of Molecular Medicine and Surgery, Karolinska Institutet , Stockholm , Sweden
| | - Niki Stavroyianni
- Hematology Department and HCT Unit, G. Papanicolaou Hospital , Thessaloniki , Greece
| | - Chandrasekhar Kanduri
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg , Gothenburg , Sweden
| | - Kostas Stamatopoulos
- Institute of Applied Biosciences, Center for Research and Technology Hellas , Thessaloniki , Greece
| | - Richard Rosenquist
- Department of Molecular Medicine and Surgery, Karolinska Institutet , Stockholm , Sweden
| | - Meena Kanduri
- Department of Clinical chemistry and Transfusion medicine, Sahlgrenska University Hospital , Gothenburg , Sweden
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12
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Tsanousa A, Ntoufa S, Papakonstantinou N, Stamatopoulos K, Angelis L. Study of gene expressions' correlation structures in subgroups of Chronic Lymphocytic Leukemia Patients. J Biomed Inform 2019; 95:103211. [PMID: 31108207 DOI: 10.1016/j.jbi.2019.103211] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 05/23/2018] [Revised: 05/01/2019] [Accepted: 05/17/2019] [Indexed: 01/28/2023]
Abstract
In chronic lymphocytic leukemia (CLL) the interaction of leukemic cells with the microenvironment ultimately affects patient outcome. CLL cases can be divided in two subgroups with different clinical course based on the mutational status of the immunoglobulin heavy variable (IGHV) genes: mutated CLL (M-CLL) and unmutated CLL (U-CLL). Since in CLL, the differentiated relation of genes between the two subgroups is of greater importance than the individual gene behavior, this paper investigates the differences between the groups' gene interactions, by comparing their correlation structures. Fisher's test and Zou's confidence intervals are employed to detect differences of correlation coefficients. Afterwards, networks created by the genes participating in most differences are estimated with the use of structural equation models (SEM). The analysis is enhanced with graph modeling in order to visualize the between group differences in the gene structures of the two subgroups. The applied methodology revealed stronger correlations between genes in U-CLL patients, a finding in line with related biomedical literature. Using SEM for multigroup analysis, different gene structures between the two groups of patients were confirmed. The study of correlation structures can facilitate the detection of differential gene expression profiles in CLL subgroups, with potential applications in other diseases. Comparison of correlations can be very useful in understanding the complex internal structural differences which signify the variations of a disease.
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MESH Headings
- Algorithms
- Biomarkers, Tumor/classification
- Biomarkers, Tumor/genetics
- Computational Biology
- Female
- Humans
- Leukemia, Lymphocytic, Chronic, B-Cell/classification
- Leukemia, Lymphocytic, Chronic, B-Cell/genetics
- Leukemia, Lymphocytic, Chronic, B-Cell/metabolism
- Male
- Mutation/genetics
- Transcriptome/genetics
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Affiliation(s)
- Athina Tsanousa
- Department of Informatics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
| | - Stavroula Ntoufa
- Institute of Applied Biosciences, Center for Research and Technology Hellas, Thessaloniki, Greece
| | - Nikos Papakonstantinou
- Institute of Applied Biosciences, Center for Research and Technology Hellas, Thessaloniki, Greece
| | - Kostas Stamatopoulos
- Institute of Applied Biosciences, Center for Research and Technology Hellas, Thessaloniki, Greece; Hematology Department and HCT Unit, G. Papanikolaou Hospital, Exochi, 57010 Thessaloniki, Greece
| | - Lefteris Angelis
- Department of Informatics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
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13
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Papakonstantinou N, Ntoufa S, Tsagiopoulou M, Moysiadis T, Bhoi S, Malousi A, Psomopoulos F, Mansouri L, Laidou S, Papazoglou D, Gounari M, Pasentsis K, Plevova K, Kuci-Emruli V, Duran-Ferrer M, Davis Z, Ek S, Rossi D, Gaidano G, Ritgen M, Oscier D, Stavroyianni N, Pospisilova S, Davi F, Ghia P, Hadzidimitriou A, Belessi C, Martin-Subero JI, Pott C, Rosenquist R, Stamatopoulos K. Integrated epigenomic and transcriptomic analysis reveals TP63 as a novel player in clinically aggressive chronic lymphocytic leukemia. Int J Cancer 2019; 144:2695-2706. [PMID: 30447004 DOI: 10.1002/ijc.31999] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [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: 03/06/2018] [Revised: 10/01/2018] [Accepted: 10/29/2018] [Indexed: 01/19/2023]
Abstract
Chronic lymphocytic leukemia (CLL) stereotyped subsets #6 and #8 include cases expressing unmutated B cell receptor immunoglobulin (BcR IG) (U-CLL). Subset #6 (IGHV1-69/IGKV3-20) is less aggressive compared to subset #8 (IGHV4-39/IGKV1(D)-39) which has the highest risk for Richter's transformation among all CLL. The underlying reasons for this divergent clinical behavior are not fully elucidated. To gain insight into this issue, here we focused on epigenomic signatures and their links with gene expression, particularly investigating genome-wide DNA methylation profiles in subsets #6 and #8 as well as other U-CLL cases not expressing stereotyped BcR IG. We found that subset #8 showed a distinctive DNA methylation profile compared to all other U-CLL cases, including subset #6. Integrated analysis of DNA methylation and gene expression revealed significant correlation for several genes, particularly highlighting a relevant role for the TP63 gene which was hypomethylated and overexpressed in subset #8. This observation was validated by quantitative PCR, which also revealed TP63 mRNA overexpression in additional nonsubset U-CLL cases. BcR stimulation had distinct effects on p63 protein expression, particularly leading to induction in subset #8, accompanied by increased CLL cell survival. This pro-survival effect was also supported by siRNA-mediated downregulation of p63 expression resulting in increased apoptosis. In conclusion, we report that DNA methylation profiles may vary even among CLL patients with similar somatic hypermutation status, supporting a compartmentalized approach to dissecting CLL biology. Furthermore, we highlight p63 as a novel prosurvival factor in CLL, thus identifying another piece of the complex puzzle of clinical aggressiveness.
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Affiliation(s)
- Nikos Papakonstantinou
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece.,Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Stavroula Ntoufa
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece.,Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Maria Tsagiopoulou
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece
| | - Theodoros Moysiadis
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece
| | - Sujata Bhoi
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Andigoni Malousi
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece.,Laboratory of Biological Chemistry, Medical School, Aristotle University of Thessaloniki, Greece
| | - Fotis Psomopoulos
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece.,Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Larry Mansouri
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden.,Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Stamatia Laidou
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece
| | - Despoina Papazoglou
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece
| | - Maria Gounari
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece
| | - Konstantinos Pasentsis
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece
| | - Karla Plevova
- Center of Molecular Biology and Gene Therapy, Department of Internal Medicine-Hematology and Oncology, University Hospital Brno and Medical Faculty of the Masaryk University, Brno, Czech republic
| | - Venera Kuci-Emruli
- Department of Immunotechnology, Faculty of Engineering, Lund University, Sweden
| | - Marti Duran-Ferrer
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Departamento de Fundamentos Clínicos, Universitat de Barcelona, Barcelona, Spain
| | - Zadie Davis
- Department of Haematology, Royal Bournemouth Hospital, Bournemouth, UK
| | - Sara Ek
- Department of Immunotechnology, Faculty of Engineering, Lund University, Sweden
| | - Davide Rossi
- Hematology, Oncology Institute of Southern Switzerland and Institute of Oncology Research, Bellinzona, Switzerland
| | - Gianluca Gaidano
- Division of Hematology, Department of Translational Medicine, Amedeo Avogadro University of Eastern Piedmont, Novara, Italy
| | - Matthias Ritgen
- Second Medical Department, University Hospital Schleswig-Holstein, Kiel, Germany
| | - David Oscier
- Department of Haematology, Royal Bournemouth Hospital, Bournemouth, UK
| | - Niki Stavroyianni
- Hematology Department and HCT Unit, G. Papanicolaou Hospital, Thessaloniki, Greece
| | - Sarka Pospisilova
- Center of Molecular Biology and Gene Therapy, Department of Internal Medicine-Hematology and Oncology, University Hospital Brno and Medical Faculty of the Masaryk University, Brno, Czech republic
| | - Frederic Davi
- Hematology Department and University Pierre et Marie Curie, Paris, France
| | - Paolo Ghia
- Division of Experimental Oncology, Department of Onco-Hematology, IRCCS San Raffaele Scientific Institute and Università Vita-Salute San Raffaele, Milan, Italy
| | - Anastasia Hadzidimitriou
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece
| | | | - Jose I Martin-Subero
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Departamento de Fundamentos Clínicos, Universitat de Barcelona, Barcelona, Spain
| | - Christiane Pott
- Second Medical Department, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Richard Rosenquist
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden.,Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Kostas Stamatopoulos
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki, Greece.,Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
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14
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Papakonstantinou N, Ntoufa S, Chartomatsidou E, Kotta K, Agathangelidis A, Giassafaki L, Karamanli T, Bele P, Moysiadis T, Baliakas P, Sutton LA, Stavroyianni N, Anagnostopoulos A, Makris AM, Ghia P, Rosenquist R, Stamatopoulos K. The histone methyltransferase EZH2 as a novel prosurvival factor in clinically aggressive chronic lymphocytic leukemia. Oncotarget 2017; 7:35946-35959. [PMID: 27191993 PMCID: PMC5094974 DOI: 10.18632/oncotarget.9371] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [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: 11/09/2015] [Accepted: 04/24/2016] [Indexed: 12/19/2022] Open
Abstract
The histone methyltransferase EZH2 induces gene repression through trimethylation of histone H3 at lysine 27 (H3K27me3). EZH2 overexpression has been reported in many types of cancer and associated with poor prognosis. Here we investigated the expression and functionality of EZH2 in chronic lymphocytic leukemia (CLL). Aggressive cases with unmutated IGHV genes (U-CLL) displayed significantly higher EZH2 expression compared to indolent CLL cases with mutated IGHV genes (M-CLL); furthermore, in U-CLL EZH2 expression was upregulated with disease progression. Within U-CLL, EZH2high cases harbored significantly fewer (p = 0.033) TP53 gene abnormalities compared to EZH2low cases. EZH2high cases displayed high H3K27me3 levels and increased viability suggesting that EZH2 is functional and likely confers a survival advantage to CLL cells. This argument was further supported by siRNA-mediated downmodulation of EZH2 which resulted in increased apoptosis. Notably, at the intraclonal level, cell proliferation was significantly associated with EZH2 expression. Treatment of primary CLL cells with EZH2 inhibitors induced downregulation of H3K27me3 levels leading to increased cell apoptosis. In conclusion, EZH2 is overexpressed in adverse-prognosis CLL and associated with increased cell survival and proliferation. Pharmacologic inhibition of EZH2 catalytic activity promotes apoptosis, highlighting EZH2 as a novel potential therapeutic target for specific subgroups of patients with CLL.
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Affiliation(s)
- Nikos Papakonstantinou
- Institute of Applied Biosciences, Center for Research and Technology Hellas, Thessaloniki, Greece.,Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Stavroula Ntoufa
- Institute of Applied Biosciences, Center for Research and Technology Hellas, Thessaloniki, Greece.,Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Elisavet Chartomatsidou
- Institute of Applied Biosciences, Center for Research and Technology Hellas, Thessaloniki, Greece
| | - Konstantia Kotta
- Institute of Applied Biosciences, Center for Research and Technology Hellas, Thessaloniki, Greece
| | - Andreas Agathangelidis
- Division of Experimental Oncology and Department of Onco-Hematology, IRCCS San Raffaele Scientific Institute and Università Vita-Salute San Raffaele, Milan, Italy
| | - Lefki Giassafaki
- Institute of Applied Biosciences, Center for Research and Technology Hellas, Thessaloniki, Greece
| | - Tzeni Karamanli
- Institute of Applied Biosciences, Center for Research and Technology Hellas, Thessaloniki, Greece
| | - Panagiota Bele
- Institute of Applied Biosciences, Center for Research and Technology Hellas, Thessaloniki, Greece
| | - Theodoros Moysiadis
- Institute of Applied Biosciences, Center for Research and Technology Hellas, Thessaloniki, Greece
| | - Panagiotis Baliakas
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Lesley Ann Sutton
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Niki Stavroyianni
- Hematology Department and HCT Unit, G. Papanicolaou Hospital, Thessaloniki, Greece
| | | | - Antonios M Makris
- Institute of Applied Biosciences, Center for Research and Technology Hellas, Thessaloniki, Greece
| | - Paolo Ghia
- Division of Experimental Oncology and Department of Onco-Hematology, IRCCS San Raffaele Scientific Institute and Università Vita-Salute San Raffaele, Milan, Italy
| | - Richard Rosenquist
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Kostas Stamatopoulos
- Institute of Applied Biosciences, Center for Research and Technology Hellas, Thessaloniki, Greece.,Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden.,Hematology Department and HCT Unit, G. Papanicolaou Hospital, Thessaloniki, Greece
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15
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Vilia MG, Fonte E, Veliz Rodriguez T, Tocchetti M, Ranghetti P, Scarfò L, Papakonstantinou N, Ntoufa S, Stamatopoulos K, Ghia P, Muzio M. The inhibitory receptor toll interleukin-1R 8 (TIR8/IL-1R8/SIGIRR) is downregulated in chronic lymphocytic leukemia. Leuk Lymphoma 2017; 58:2419-2425. [PMID: 28278705 DOI: 10.1080/10428194.2017.1295142] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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: 10/19/2022]
Abstract
Toll interleukin-1 receptor 8 (also known as TIR8, SIGIRR, or IL1R8) is a transmembrane receptor that inhibits inflammation. Accordingly, genetic inactivation of this protein exacerbates chronic inflammation and inflammation-associated tumors in mice. In particular, lack of TIR8 triggers leukemia progression in a mouse model of chronic lymphocytic leukemia (CLL), supporting its role as a novel tumor restrainer. The aim of this study was to measure the amount of TIR8 mRNA and protein in CLL cells, and to analyze its regulation of expression. Circulating leukemic cells expressed lower levels of TIR8 compared to normal B-lymphocytes. Treatment of CLL cells with Azacytidine restored higher levels of TIR8 suggesting that DNA methylation may be involved in modulating TIR8 expression, with implications for novel therapeutic strategies.
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Affiliation(s)
- Maria Giovanna Vilia
- a Division of Experimental Oncology , IRCCS San Raffaele Scientific Institute , Milano , Italy
| | - Eleonora Fonte
- a Division of Experimental Oncology , IRCCS San Raffaele Scientific Institute , Milano , Italy
| | - Tania Veliz Rodriguez
- a Division of Experimental Oncology , IRCCS San Raffaele Scientific Institute , Milano , Italy
| | - Marta Tocchetti
- a Division of Experimental Oncology , IRCCS San Raffaele Scientific Institute , Milano , Italy
| | - Pamela Ranghetti
- a Division of Experimental Oncology , IRCCS San Raffaele Scientific Institute , Milano , Italy
| | - Lydia Scarfò
- a Division of Experimental Oncology , IRCCS San Raffaele Scientific Institute , Milano , Italy.,b Vita-Salute San Raffaele University , Milano , Italy
| | - Nikos Papakonstantinou
- c Institute of Applied Biosciences, CERTH , Thessaloniki , Greece.,d Department of Immunology, Genetics and Pathology, Rudbeck Laboratory , Uppsala University , Uppsala , Sweden
| | - Stavroula Ntoufa
- c Institute of Applied Biosciences, CERTH , Thessaloniki , Greece.,d Department of Immunology, Genetics and Pathology, Rudbeck Laboratory , Uppsala University , Uppsala , Sweden
| | - Kostas Stamatopoulos
- c Institute of Applied Biosciences, CERTH , Thessaloniki , Greece.,d Department of Immunology, Genetics and Pathology, Rudbeck Laboratory , Uppsala University , Uppsala , Sweden
| | - Paolo Ghia
- a Division of Experimental Oncology , IRCCS San Raffaele Scientific Institute , Milano , Italy.,b Vita-Salute San Raffaele University , Milano , Italy
| | - Marta Muzio
- a Division of Experimental Oncology , IRCCS San Raffaele Scientific Institute , Milano , Italy
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16
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Athanassiadi K, Papakonstantinou N, Makrygianni A, Alevizakis I. P-232THE USE OF PEZZER CATHETER IN PERSISTENT AIR LEAK. Interact Cardiovasc Thorac Surg 2016. [DOI: 10.1093/icvts/ivw260.230] [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: 11/13/2022] Open
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17
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Mansouri L, Papakonstantinou N, Ntoufa S, Stamatopoulos K, Rosenquist R. NF-κB activation in chronic lymphocytic leukemia: A point of convergence of external triggers and intrinsic lesions. Semin Cancer Biol 2016; 39:40-8. [PMID: 27491692 DOI: 10.1016/j.semcancer.2016.07.005] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [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: 07/29/2016] [Accepted: 07/30/2016] [Indexed: 02/08/2023]
Abstract
The nuclear factor-κB (NF-κB) pathway is constitutively activated in chronic lymphocytic leukemia (CLL) patients, and hence plays a major role in disease development and evolution. In contrast to many other mature B-cell lymphomas, only a few recurrently mutated genes involved in canonical or non-canonical NF-κB activation have been identified in CLL (i.e. BIRC3, MYD88 and NFKBIE mutations) and often at a low frequency. On the other hand, CLL B cells seem 'addicted' to the tumor microenvironment for their survival and proliferation, which is primarily mediated by interaction through a number of cell surface receptors, e.g. the B-cell receptor (BcR), Toll-like receptors and CD40, that in turn activate downstream NF-κB. The importance of cell-extrinsic triggering for CLL pathophysiology was recently also highlighted by the clinical efficacy of novel drugs targeting microenvironmental interactions through the inhibition of BcR signaling. In other words, CLL can be considered a prototype disease for studying the intricate interplay between external triggers and intrinsic aberrations and their combined impact on disease evolution. In this review, we will discuss the current understanding of mechanisms underlying NF-κB deregulation in CLL, including micro-environmental, genetic and epigenetic events, and summarize data generated in murine models resembling human CLL. Finally, we will also discuss different strategies undertaken to intervene with the NF-κB pathway and its upstream mediators.
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Affiliation(s)
- Larry Mansouri
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Nikos Papakonstantinou
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden; Institute of Applied Biosciences, CERTH, Thessaloniki, Greece
| | - Stavroula Ntoufa
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden; Institute of Applied Biosciences, CERTH, Thessaloniki, Greece
| | - Kostas Stamatopoulos
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden; Institute of Applied Biosciences, CERTH, Thessaloniki, Greece
| | - Richard Rosenquist
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden.
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Ntoufa S, Papakonstantinou N, Apollonio B, Gounari M, Galigalidou C, Fonte E, Anagnostopoulos A, Belessi C, Muzio M, Ghia P, Stamatopoulos K. B Cell Anergy Modulated by TLR1/2 and the miR-17∼92 Cluster Underlies the Indolent Clinical Course of Chronic Lymphocytic Leukemia Stereotyped Subset #4. J Immunol 2016; 196:4410-7. [PMID: 27059597 DOI: 10.4049/jimmunol.1502297] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 03/15/2016] [Indexed: 01/09/2023]
Abstract
Chronic lymphocytic leukemia (CLL) patients assigned to stereotyped subset #4 (mutated IGHV4-34/IGKV2-30 BCR Ig) display a particularly indolent disease course. Immunogenetic studies of the clonotypic BCR Ig of CLL subset #4 suggested a resemblance with B cells rendered anergic through chronic autoantigenic stimulation. In this article, we provide experimental evidence that subset #4 CLL cells show low IgG levels, constitutive ERK1/2 activation, and fail to either release intracellular Ca(2+) or activate MAPK signaling after BCR cross-linking, thus displaying a signature of B cell anergy at both biochemical and functional levels. Interestingly, TLR1/2 triggering restored BCR functionality, likely breaching the anergic state, and this was accompanied by induction of the miR-17∼92 cluster, whose members target critical BCR-associated molecules, including MAPKs. In conclusion, we demonstrate BCR anergy in CLL subset #4 and implicate TLR signaling and the miR-17∼92 cluster in the regulation of the anergic state. This detailed signaling profiling of subset #4 has implications for advanced understanding of the complex regulation of intracellular signaling pathways in CLL, currently a major therapeutic target of the disease.
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Affiliation(s)
- Stavroula Ntoufa
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki 57001, Greece; Hematology Department and Hematopoietic Cell Transplantation Unit, George Papanikolaou Hospital, Thessaloniki 57010, Greece
| | - Nikos Papakonstantinou
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki 57001, Greece; Hematology Department and Hematopoietic Cell Transplantation Unit, George Papanikolaou Hospital, Thessaloniki 57010, Greece
| | - Benedetta Apollonio
- Division of Experimental Oncology, IRCCS San Raffaele Scientific Institute, Milan 20132, Italy
| | - Maria Gounari
- Division of Experimental Oncology, IRCCS San Raffaele Scientific Institute, Milan 20132, Italy
| | - Chrysi Galigalidou
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki 57001, Greece
| | - Eleonora Fonte
- Division of Experimental Oncology, IRCCS San Raffaele Scientific Institute, Milan 20132, Italy
| | - Achilles Anagnostopoulos
- Hematology Department and Hematopoietic Cell Transplantation Unit, George Papanikolaou Hospital, Thessaloniki 57010, Greece
| | - Chrysoula Belessi
- Hematology Department, Nikea General Hospital, Pireaus 18454, Greece
| | - Marta Muzio
- Division of Experimental Oncology, IRCCS San Raffaele Scientific Institute, Milan 20132, Italy
| | - Paolo Ghia
- Division of Experimental Oncology, IRCCS San Raffaele Scientific Institute, Milan 20132, Italy; Lymphoma Unit, Department of Onco-Hematology, Università Vita-Salute San Raffaele, Milan 20132, Italy; and
| | - Kostas Stamatopoulos
- Institute of Applied Biosciences, Centre for Research and Technology Hellas, Thessaloniki 57001, Greece; Hematology Department and Hematopoietic Cell Transplantation Unit, George Papanikolaou Hospital, Thessaloniki 57010, Greece; Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala 75105, Sweden
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Grigoropoulos P, Papakonstantinou N, Drakou A, Karoutsos D, Tsompalioti M, Dagadaki O, Issaiadis D, Tsipoura A, Ammari S. P333 BMI and association with histopathological characteristics of the tumor in postmenopausal women. Breast 2015. [DOI: 10.1016/s0960-9776(15)70363-2] [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: 11/29/2022] Open
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Chatzouli M, Ntoufa S, Papakonstantinou N, Chartomatsidou E, Anagnostopoulos A, Kollia P, Ghia P, Muzio M, Stamatopoulos K, Belessi C. Heterogeneous functional effects of concomitant B cell receptor and TLR stimulation in chronic lymphocytic leukemia with mutated versus unmutated Ig genes. J Immunol 2014; 192:4518-24. [PMID: 24719462 DOI: 10.4049/jimmunol.1302102] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We recently reported that chronic lymphocytic leukemia (CLL) subgroups with distinct clonotypic BCRs present discrete patterns of TLR expression, function, and/or tolerance. In this study, to explore whether specific types of BCR/TLR collaboration exist in CLL, we studied the effect of single versus concomitant BCR and/or TLR stimulation on CLL cells from mutated (M-CLL) and unmutated CLL (U-CLL) cases. We stimulated negatively isolated CLL cells by using anti-IgM, imiquimod, and CpG oligodeoxynucleotide for BCR, TLR7, and TLR9, respectively, alone or in combination for different time points. After in vitro culture in the absence of stimulation, differences in p-ERK were identified at any time point, with higher p-ERK levels in U-CLL versus M-CLL. Pronounced p-ERK induction was seen by single stimulation in U-CLL, whereas BCR/TLR synergism was required in M-CLL, in which the effect was overall limited in scale. An opposite pattern was observed regarding induction of apoptosis, as studied by Western blotting for the cleaved fragment of poly(ADP-ribose) polymerase, and the active isoform of caspase-8, with M-CLL responding even to single stimulation, contrasting with U-CLL that showed minimal response. Our findings suggest that concomitant engagement of BCR and TLR leads to differential responses in CLL depending on the mutational status of the BCR. Differential intensity and duration of responses in M-CLL versus U-CLL indicates that the differences in signal transduction between the two subgroups may be primarily quantitative rather than qualitative.
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Affiliation(s)
- Maria Chatzouli
- School of Biology, University of Athens, Athens 10679, Greece
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Kanduri M, Sander B, Ntoufa S, Papakonstantinou N, Sutton LA, Stamatopoulos K, Kanduri C, Rosenquist R. A key role for EZH2 in epigenetic silencing of HOX genes in mantle cell lymphoma. Epigenetics 2013; 8:1280-8. [PMID: 24107828 DOI: 10.4161/epi.26546] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [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: 11/19/2022] Open
Abstract
The chromatin modifier EZH2 is overexpressed and associated with inferior outcome in mantle cell lymphoma (MCL). Recently, we demonstrated preferential DNA methylation of HOX genes in MCL compared with chronic lymphocytic leukemia (CLL), despite these genes not being expressed in either entity. Since EZH2 has been shown to regulate HOX gene expression, to gain further insight into its possible role in differential silencing of HOX genes in MCL vs. CLL, we performed detailed epigenetic characterization using representative cell lines and primary samples. We observed significant overexpression of EZH2 in MCL vs. CLL. Chromatin immune precipitation (ChIP) assays revealed that EZH2 catalyzed repressive H3 lysine 27 trimethylation (H3K27me3), which was sufficient to silence HOX genes in CLL, whereas in MCL H3K27me3 is accompanied by DNA methylation for a more stable repression. More importantly, hypermethylation of the HOX genes in MCL resulted from EZH2 overexpression and subsequent recruitment of the DNA methylation machinery onto HOX gene promoters. The importance of EZH2 upregulation in this process was further underscored by siRNA transfection and EZH2 inhibitor experiments. Altogether, these observations implicate EZH2 in the long-term silencing of HOX genes in MCL, and allude to its potential as a therapeutic target with clinical impact.
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Affiliation(s)
- Meena Kanduri
- Department of Clinical Chemistry and Transfusion Medicine; Institute of Biomedicine; Gothenburg University; Gothenburg, Sweden
| | - Birgitta Sander
- Department of Laboratory Medicine; Division of Pathology; Karolinska Institutet and Karolinska University Hospital; Huddinge, Sweden
| | - Stavroula Ntoufa
- Hematology Department and HCT Unit G. Papanicolaou Hospital; Thessaloniki, Greece; Institute of Applied Biosciences; CERTH; Thessaloniki, Greece
| | - Nikos Papakonstantinou
- Hematology Department and HCT Unit G. Papanicolaou Hospital; Thessaloniki, Greece; Institute of Applied Biosciences; CERTH; Thessaloniki, Greece
| | - Lesley-Ann Sutton
- Department of Immunology, Genetics and Pathology; Uppsala University; Uppsala, Sweden
| | - Kostas Stamatopoulos
- Hematology Department and HCT Unit G. Papanicolaou Hospital; Thessaloniki, Greece; Institute of Applied Biosciences; CERTH; Thessaloniki, Greece
| | - Chandrasekhar Kanduri
- Department of Medical and Clinical Genetics; Department of Biomedicine; The Sahlgrenska Academy; Gothenburg University; Gothenburg, Sweden
| | - Richard Rosenquist
- Department of Immunology, Genetics and Pathology; Uppsala University; Uppsala, Sweden
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Papakonstantinou N, Ntoufa S, Chartomatsidou E, Papadopoulos G, Hatzigeorgiou A, Anagnostopoulos A, Chlichlia K, Ghia P, Muzio M, Belessi C, Stamatopoulos K. Differential microRNA profiles and their functional implications in different immunogenetic subsets of chronic lymphocytic leukemia. Mol Med 2013; 19:115-23. [PMID: 23615967 DOI: 10.2119/molmed.2013.00005] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Accepted: 04/16/2013] [Indexed: 01/13/2023] Open
Abstract
Critical processes of B-cell physiology, including immune signaling through the B-cell receptor (BcR) and/or Toll-like receptors (TLRs), are targeted by microRNAs. With this in mind and also given the important role of BcR and TLR signaling and microRNAs in chronic lymphocytic leukemia (CLL), we investigated whether microRNAs could be implicated in shaping the behavior of CLL clones with distinct BcR and TLR molecular and functional profiles. To this end, we examined 79 CLL cases for the expression of 33 microRNAs, selected on the following criteria: (a) deregulated in CLL versus normal B-cells; (b) differentially expressed in CLL subgroups with distinct clinicobiological features; and, (c) if meeting (a) + (b), having predicted targets in the immune signaling pathways. Significant upregulation of miR-150, miR-29c, miR-143 and miR-223 and downregulation of miR-15a was found in mutated versus unmutated CLL, with miR-15a showing the highest fold difference. Comparison of two major subsets with distinct stereotyped BcRs and signaling signatures, namely subset 1 [IGHV1/5/7-IGKV1(D)-39, unmutated, bad prognosis] versus subset 4 [IGHV4-34/IGKV2-30, mutated, good prognosis] revealed differences in the expression of miR-150, miR-29b, miR-29c and miR-101, all down-regulated in subset 1. We were also able to link these distinct microRNA profiles with cellular phenotypes, importantly showing that, in subset 1, miR-101 downregulation is associated with overexpression of the enhancer of zeste homolog 2 (EZH2) protein, which has been associated with clinical aggressiveness in other B-cell lymphomas. In conclusion, specific miRNAs differentially expressed among CLL subgroups with distinct BcR and/or TLR signaling may modulate the biological and clinical behavior of the CLL clones.
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Affiliation(s)
- Nikos Papakonstantinou
- Laboratory of Molecular Immunobiology, Department of Molecular Biology and Genetics, Democritus University of Thrace, Alexandroupolis, Greece
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Ntoufa S, Vardi A, Papakonstantinou N, Anagnostopoulos A, Aleporou-Marinou V, Belessi C, Ghia P, Caligaris-Cappio F, Muzio M, Stamatopoulos K. Distinct innate immunity pathways to activation and tolerance in subgroups of chronic lymphocytic leukemia with distinct immunoglobulin receptors. Mol Med 2012; 18:1281-91. [PMID: 22437326 DOI: 10.2119/molmed.2011.00480] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2011] [Accepted: 03/16/2012] [Indexed: 11/06/2022] Open
Abstract
Subgroups of patients with chronic lymphocytic leukemia (CLL) have distinct expression profiles of Toll-like receptor (TLR) pathway-associated genes. To test the hypothesis that signaling through innate immunity receptors may influence the behavior of the malignant clone, we investigated the functional response triggered by the stimulation of TLRs and NOD2 in 67 CLL cases assigned to different subgroups on the basis of immunoglobulin heavy variable (IGHV ) gene usage, IGHV gene mutational status or B-cell receptor (BcR) stereotypy. Differences in the induction of costimulatory molecules and/or apoptosis were observed in mutated versus unmutated CLL. Different responses were also identified in subsets with stereotyped BcRs, underscoring the idea that "subset-biased" innate immunity responses may occur independently of mutational status. Additionally, differential modulation of kinase activities was induced by TLR stimulation of different CLL subgroups, revealing a TLR7-tolerant state for cases belonging to stereotyped subset #4. The distinct patterns of TLR/NOD2 functional activity in cells from CLL subgroups defined by the molecular features of the clonotypic BcRs might prove relevant for elucidating the immune mechanisms underlying CLL natural history and for defining subgroups of patients who might benefit from treatment with specific TLR ligands.
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Arvaniti E, Ntoufa S, Papakonstantinou N, Touloumenidou T, Laoutaris N, Anagnostopoulos A, Lamnissou K, Caligaris-Cappio F, Stamatopoulos K, Ghia P, Muzio M, Belessi C. Toll-like receptor signaling pathway in chronic lymphocytic leukemia: distinct gene expression profiles of potential pathogenic significance in specific subsets of patients. Haematologica 2011; 96:1644-52. [PMID: 21750087 DOI: 10.3324/haematol.2011.044792] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND Signaling through the B-cell receptor appears to be a major contributor to the pathogenesis of chronic lymphocytic leukemia. Toll-like receptors bridge the innate and adaptive immune responses by acting as co-stimulatory signals for B cells. The available data on the expression of Toll-like receptors in chronic lymphocytic leukemia are limited and derive from small series of patients. DESIGN AND METHODS We profiled the expression of genes associated with Toll-like receptor signaling pathways in 192 cases of chronic lymphocytic leukemia and explored potential associations with molecular features of the clonotypic B-cell receptors. RESULTS Chronic lymphocytic leukemia cells express all Toll-like receptors expressed by normal activated B cells, with high expression of TLR7 and CD180, intermediate expression of TLR1, TLR6, TLR10 and low expression of TLR2 and TLR9. The vast majority of adaptors, effectors and members of the NFKB, JNK/p38, NF/IL6 and IRF pathways are intermediately-to-highly expressed, while inhibitors of Toll-like receptor activity are generally low-to-undetectable, indicating that the Toll-like receptor-signaling framework is competent in chronic lymphocytic leukemia. Significant differences were identified for selected genes between cases carrying mutated or unmutated IGHV genes or assigned to different subsets with stereotyped B-cell receptors. The differentially expressed molecules include receptors, NFκB/MAPK signaling molecules and final targets of the cascade. CONCLUSIONS The observed variations are suggestive of distinctive activation patterns of the Toll-like receptor signaling pathway in subgroups of cases of chronic lymphocytic leukemia defined by the molecular features of B-cell receptors. Additionally, they indicate that different or concomitant signals acting through receptors other than the B-cell receptor can affect the behavior of the malignant clone.
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Skarlos D, Kyrodimou E, Papakonstantinou N, Klouvas G, Christodoulou C, Papadimas G, Koutselini H. Platelet-derived growth factor receptor alpha (PDGFRA) and C-Kit immunohistochemistry (IHC) in gastrointestinal stromal tumours (GISTs). J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.15156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
15156 Background: The vast majority of GISTs show activating mutations of the genes coding for c-kit (CD 117) and PDGFRA, two receptor tyrosine kinases (RTKs). The exact role of PDGFRA as this expressed immunohistochemically (IHC), has not been fully elucidated in the diagnosis and treatment of GISTs. The aim of this study was (1) to try to correlate the pathological features of patients (pts) with GISTs, with c-kit and PDGFRA as these expressed by IHC and 2) to correlate the c-kit and PDGFRA with the clinical outcome of the pts. We report here the first part of the study. Materials and Methods: Twenty one (21) pts with GISTs were studied 14 located in the stomach, 3 in small bowel, 3 in colon and 1 in the mesenterium. Criteria for positivity of c-kit were strong membranus, cytoplasmic and paranuclear staining and for PDGFRA dot-like or Golgi pattern of staining. Median age was 61 years while there was a male predominance. Results: C-kit was detected in 95% of cases while PDGFRA in 90.5%. All the GISTs that were positive for PDGFRA were also positive for c-kit. Conclusions: Preliminary results of the first part of the study show that an accurate diagnosis of GISTs can be achieved based on the conventional histological and IHC criteria without the need for mutational analysis. No significant financial relationships to disclose.
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