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Kiss Z, Gálffy G, Müller V, Moldvay J, Sárosi V, Pápai-Székely Z, Csada E, Kerpel-Fronius A, Király Z, Szász Z, Hódi G, Polányi Z, Kovács K, Karamousouli E, Knollmajer K, Szabó TG, Berta A, Vokó Z, Rokszin G, Abonyi-Tóth Z, Barcza Z, Tamási L, Bogos K. Significant changes in advanced lung cancer survival during the past decade in Hungary: impact of modern immunotherapy and the COVID-19 pandemic. Front Oncol 2023; 13:1207295. [PMID: 37860193 PMCID: PMC10584310 DOI: 10.3389/fonc.2023.1207295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 09/14/2023] [Indexed: 10/21/2023] Open
Abstract
Objective The approval of immunotherapy (I-O) for the treatment of late-stage non-small cell lung cancer (NSCLC) opened new perspectives in improving survival outcomes. However, survival data have not yet been provided from the period of the Covid-19 pandemic. The aims of our study were to assess and compare survival outcomes of patients with advanced LC receiving systemic anticancer treatment (SACT) before and after the approval of immunotherapy in Hungary, and to examine the impact of pandemic on survival outcomes using data from the Hungarian National Health Insurance Fund (NHIF) database. Methods This retrospective, longitudinal study included patients aged ≥20 years who were diagnosed with advanced stage lung cancer (LC) (ICD-10 C34) between 1 January 2011 and 31 December 2021 and received SACT treatment without LC-related surgery. Survival rates were evaluated by year of diagnosis, sex, age, and LC histology. Results In total, 35,416 patients were newly diagnosed with advanced LC and received SACT during the study period (mean age at diagnosis: 62.1-66.3 years). In patients with non-squamous cell carcinoma, 3-year survival was significantly higher among those diagnosed in 2019 vs. 2011-2012 (28.7% [95% CI: 26.4%-30.9%] vs. 14.45% [95% CI: 13.21%-15.69%], respectively). In patients with squamous cell carcinoma, 3-year survival rates were 22.3% (95% CI: 19.4%-25.2%) and 13.37% (95% CI: 11.8%-15.0%) in 2019 and 2011-2012, respectively, the change was statistically significant. Compared to 2011-2012, the hazard ratio of survival change for non-squamous cell carcinoma patients was 0.91, 0.82, and 0.62 in 2015-2016, 2017-2018, and 2019, respectively (p<0.001 for all cases). In the squamous cell carcinoma group, corresponding hazard ratios were 0.93, 0.87, and 0.78, respectively (p<0.001 for all cases). Survival improvements remained significant in both patient populations during the Covid-19 pandemic (2020-2021). No significant improvements were found in the survival of patients with small cell carcinoma. Platinum-based chemotherapy was the most common first-line treatment in all diagnostic periods, however, the proportion of patients receiving first- or second-line immunotherapy significantly increased during the study period. Conclusion 3-year survival rates of NSCLC almost doubled among patients with non-squamous cell carcinoma and significantly improved at squamous cell carcinoma over the past decade in Hungary. Improvements could potentially be attributable by the introduction of immunotherapy and were not offset by the Covid-19 pandemic.
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Affiliation(s)
- Zoltán Kiss
- MSD Pharma Hungary Ltd, Budapest, Hungary
- Second Department of Medicine and Nephrology-Diabetes Center, University of Pécs Medical School, Pécs, Hungary
| | - Gabriella Gálffy
- Pulmonology Hospital Törökbálint, Department of Pulmonology, Törökbálin, Hungary
| | - Veronika Müller
- Department of Pulmonology, Semmelweis University, Budapest, Hungary
| | - Judit Moldvay
- 1st Department of Pulmonology, National Korányi Institute of Pulmonology, Budapest, Hungary
- 2nd Department of Pathology, MTA-SE NAP, Brain Metastasis Research Group, Hungarian Academy of Sciences, Semmelweis University, Budapest, Hungary
| | | | - Zsolt Pápai-Székely
- Fejér County Szent György, University Teaching Hospital, Székesfehérvár, Hungary
| | - Edit Csada
- Csongrád-Csanád County Hospital for Chest Diseases, Deszk, Hungary
| | - Anna Kerpel-Fronius
- National Korányi Institute of Pulmonology, Department of Radiology, Budapest, Hungary
| | - Zsolt Király
- Veszprém County Pulmonary Hospital, Farkasgyepű, Hungary
| | - Zoltán Szász
- Department of Pulmonology, Petz Aladár University Teaching Hospital, Győr, Hungary
| | - Gábor Hódi
- MSD Pharma Hungary Ltd, Budapest, Hungary
| | | | | | | | | | | | | | - Zoltán Vokó
- Center for Health Technology Assessment, Semmelweis University, Budapest, Hungary
- Syreon Research Institute, Budapest, Hungary
| | | | - Zsolt Abonyi-Tóth
- RxTarget Ltd., Szolnok, Hungary
- Department of Biostatistics, University of Veterinary Medicine, Budapest, Hungary
| | | | - Lilla Tamási
- Pulmonology Hospital Törökbálint, Department of Pulmonology, Törökbálin, Hungary
| | - Krisztina Bogos
- National Korányi Institute of Pulmonology, Budapest, Hungary
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Horvati K, Bősze S, Gideon HP, Bacsa B, Szabó TG, Goliath R, Rangaka MX, Hudecz F, Wilkinson RJ, Wilkinson KA. Population tailored modification of tuberculosis specific interferon-gamma release assay. J Infect 2015; 72:179-88. [PMID: 26632326 PMCID: PMC4747975 DOI: 10.1016/j.jinf.2015.10.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 10/13/2015] [Accepted: 10/23/2015] [Indexed: 11/12/2022]
Abstract
Objectives Blood-based Interferon-Gamma Release Assays (IGRA) identify Mycobacterium tuberculosis (MTB) sensitisation with increased specificity, but sensitivity remains impaired in human immunodeficiency virus (HIV) infected persons. The QuantiFERON-TB Gold In-Tube test contains peptide 38–55 of Rv2654c, based on data indicating differential recognition between tuberculosis patients and BCG vaccinated controls in Europe. We aimed to fine map the T cell response to Rv2654c with the view of improving sensitivity. Methods Interferon-gamma ELISpot assay was used in HIV uninfected persons with latent and active tuberculosis to map peptide epitopes of Rv2654c. A modified IGRA was tested in two further groups of 55 HIV uninfected and 44 HIV infected persons, recruited in South Africa. Results The most prominently recognised peptide was between amino acids 51–65. Using p51-65 to boost the QuantiFERON-TB Gold In-Tube assay, the quantitative performance of the modified IGRA increased from 1.83 IU/ml (IQR 0.30–7.35) to 2.83 (IQR 0.28–12.2; p = 0.002) in the HIV uninfected group. In the HIV infected cohort the percentage of positive responders increased from 57% to 64% but only after 3 months of ART (p = ns). Conclusions Our data shows the potential to population tailor detection of MTB sensitization using specific synthetic peptides and interferon-gamma release in vitro. Refined epitope mapping of Rv2654c was performed in a South African Xhosa population. The most frequently recognized peptide is p51-65 (VRAVAESHGVAAVLF). Using p51-65 in the QFT assay resulted in a significant boosting effect. Peptide p51-65 can improve the population tailored detection of MTB sensitization.
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Affiliation(s)
- Kata Horvati
- MTA-ELTE Research Group of Peptide Chemistry, Eötvös L. University, Budapest, Hungary
| | - Szilvia Bősze
- MTA-ELTE Research Group of Peptide Chemistry, Eötvös L. University, Budapest, Hungary
| | - Hannah P Gideon
- Clinical Infectious Disease Research Initiative, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Bernadett Bacsa
- MTA-ELTE Research Group of Peptide Chemistry, Eötvös L. University, Budapest, Hungary
| | - Tamás G Szabó
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Hungary; Department of Laboratory Medicine, Semmelweis University, Budapest, Hungary
| | - Rene Goliath
- Clinical Infectious Disease Research Initiative, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Molebogeng X Rangaka
- Clinical Infectious Disease Research Initiative, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Ferenc Hudecz
- MTA-ELTE Research Group of Peptide Chemistry, Eötvös L. University, Budapest, Hungary; Department of Organic Chemistry, Eötvös L. University, Budapest, Hungary
| | - Robert J Wilkinson
- Clinical Infectious Disease Research Initiative, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa; The Francis Crick Institute Mill Hill Laboratory, London NW7 1AA, UK; Department of Medicine, Imperial College London W2 1PG, UK
| | - Katalin A Wilkinson
- Clinical Infectious Disease Research Initiative, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa; The Francis Crick Institute Mill Hill Laboratory, London NW7 1AA, UK.
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Aikawa E, Gardiner C, Hutcheson JD, Ochiya T, Osteikoetxea X, Pegtel M, Piper M, Quesenberry P, Schiffelers RM, Szabó TG, Buzas EI. International Society for Extracellular Vesicles: Second Annual Meeting, 17-20 April 2013, Boston, MA (ISEV 2013). J Extracell Vesicles 2013; 2:23070. [PMID: 26082318 PMCID: PMC3854124 DOI: 10.3402/jev.v2i0.23070] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Elena Aikawa
- Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115
| | - Chris Gardiner
- Nuffield Department of Obstetrics and Gynaecology, University of Oxford, Oxford, United Kingdom
| | - Joshua D Hutcheson
- Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115
| | - Takahiro Ochiya
- Division of Molecular and Cellular Medicine, National Cancer Center Research Institute, Tokyo, Japan
| | - Xabier Osteikoetxea
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Hungary
| | - Michiel Pegtel
- Department of Pathology, VU University Medical Center, Amsterdam, The Netherlands
| | - Melissa Piper
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Davis Heart and Lung Research Institute, Columbus, OH, USA
| | - Peter Quesenberry
- Division of Hematology/Oncology, Rhode Island Hospital/The Miriam Hospital, The Warren Alpert Medical School of Brown University, Providence, RI, USA
| | - Raymond M Schiffelers
- Division of Laboratories & Pharmacy Laboratory of Clinical Chemistry & Haematology UMC Utrecht, The Netherlands
| | - Tamás G Szabó
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Hungary
| | - Edit I Buzas
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Hungary
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György B, Pálóczi K, Kovács A, Barabás E, Bekő G, Várnai K, Pállinger É, Szabó-Taylor K, Szabó TG, Kiss AA, Falus A, Buzás EI. Improved circulating microparticle analysis in acid-citrate dextrose (ACD) anticoagulant tube. Thromb Res 2013; 133:285-92. [PMID: 24360116 DOI: 10.1016/j.thromres.2013.11.010] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Revised: 09/13/2013] [Accepted: 11/18/2013] [Indexed: 12/22/2022]
Abstract
INTRODUCTION Recently extracellular vesicles (exosomes, microparticles also referred to as microvesicles and apoptotic bodies) have attracted substantial interest as potential biomarkers and therapeutic vehicles. However, analysis of microparticles in biological fluids is confounded by many factors such as the activation of cells in the blood collection tube that leads to in vitro vesiculation. In this study we aimed at identifying an anticoagulant that prevents in vitro vesiculation in blood plasma samples. MATERIALS AND METHODS We compared the levels of platelet microparticles and non-platelet-derived microparticles in platelet-free plasma samples of healthy donors. Platelet-free plasma samples were isolated using different anticoagulant tubes, and were analyzed by flow cytometry and Zymuphen assay. The extent of in vitro vesiculation was compared in citrate and acid-citrate-dextrose (ACD) tubes. RESULTS Agitation and storage of blood samples at 37 °C for 1 hour induced a strong release of both platelet microparticles and non-platelet-derived microparticles. Strikingly, in vitro vesiculation related to blood sample handling and storage was prevented in samples in ACD tubes. Importantly, microparticle levels elevated in vivo remained detectable in ACD tubes. CONCLUSIONS We propose the general use of the ACD tube instead of other conventional anticoagulant tubes for the assessment of plasma microparticles since it gives a more realistic picture of the in vivo levels of circulating microparticles and does not interfere with downstream protein or RNA analyses.
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Affiliation(s)
- Bence György
- Semmelweis University, Department of Genetics, Cell- and Immunobiology, Budapest, Hungary.
| | - Krisztina Pálóczi
- Semmelweis University, Department of Genetics, Cell- and Immunobiology, Budapest, Hungary
| | - Alexandra Kovács
- Semmelweis University, Department of Genetics, Cell- and Immunobiology, Budapest, Hungary
| | - Eszter Barabás
- Semmelweis University, Department of Laboratory Medicine, Budapest, Hungary
| | - Gabriella Bekő
- Semmelweis University, Department of Laboratory Medicine, Budapest, Hungary
| | - Katalin Várnai
- Semmelweis University, Department of Laboratory Medicine, Budapest, Hungary
| | - Éva Pállinger
- Semmelweis University, Department of Genetics, Cell- and Immunobiology, Budapest, Hungary
| | - Katalin Szabó-Taylor
- Semmelweis University, Department of Genetics, Cell- and Immunobiology, Budapest, Hungary
| | - Tamás G Szabó
- Semmelweis University, Department of Genetics, Cell- and Immunobiology, Budapest, Hungary
| | - Attila A Kiss
- Military Hospital, National Health Institute, Department of Obstetrics and Gynecology, Budapest, Hungary
| | - András Falus
- Semmelweis University, Department of Genetics, Cell- and Immunobiology, Budapest, Hungary
| | - Edit I Buzás
- Semmelweis University, Department of Genetics, Cell- and Immunobiology, Budapest, Hungary.
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Misják P, Bősze S, Horváti K, Pásztói M, Pálóczi K, Holub MC, Szakács F, Aradi B, György B, Szabó TG, Nagy G, Glant TT, Mikecz K, Falus A, Buzás EI. The role of citrullination of an immunodominant proteoglycan (PG) aggrecan T cell epitope in BALB/c mice with PG-induced arthritis. Immunol Lett 2013; 152:25-31. [PMID: 23578666 DOI: 10.1016/j.imlet.2013.03.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Revised: 03/10/2013] [Accepted: 03/27/2013] [Indexed: 12/30/2022]
Abstract
The P70-84 peptide (also called 5/4E8 epitope) of the human cartilage proteoglycan (PG) aggrecan is the dominant/arthritogenic epitope in both humans and arthritis-prone BALB/c mice (PG-induced arthritis, PGIA). An elevated T cell reactivity was demonstrated to a citrullinated version of the P70-84 epitope in most of the patients with rheumatoid arthritis (RA). The goal of this study was to understand better how a T cell epitope, if citrullinated, may affect antigenicity/arthritogenicity in PGIA, a murine model of RA. T cell reactivity to differentially citrullinated versions of either the human PG aggrecan P70-84 peptide or the corresponding mouse sequence was assessed in peptide or aggrecan-immunized and arthritic BALB/c mice as well as in T cell receptor transgenic mice specific for peptide P70-84 sequence. Peripheral T cell responses were induced by priming BALB/c mice with either the human wild-type or its citrullinated versions. Unexpectedly, priming with the citrullinated self-peptide induced a higher T cell response compared to the wild-type sequence (p<0.001), and the citrullination of the human peptide abolished T cell reactivity in PGIA. Our data suggest that T cells reactive to the citrullinated P70-84 peptide escaped thymic selection and are present in the peripheral T cell repertoire. Results of this study provide evidence that citrullination of an immunodominant T cell epitope may substantially alter, either increase or abolish, T cell recognition at the periphery in an experimental model of arthritis.
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Affiliation(s)
- Petra Misják
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Hungary
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6
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György B, Szabó TG, Turiák L, Wright M, Herczeg P, Lédeczi Z, Kittel Á, Polgár A, Tóth K, Dérfalvi B, Zelenák G, Böröcz I, Carr B, Nagy G, Vékey K, Gay S, Falus A, Buzás EI. Improved flow cytometric assessment reveals distinct microvesicle (cell-derived microparticle) signatures in joint diseases. PLoS One 2012. [PMID: 23185418 PMCID: PMC3502255 DOI: 10.1371/journal.pone.0049726] [Citation(s) in RCA: 111] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Introduction Microvesicles (MVs), earlier referred to as microparticles, represent a major type of extracellular vesicles currently considered as novel biomarkers in various clinical settings such as autoimmune disorders. However, the analysis of MVs in body fluids has not been fully standardized yet, and there are numerous pitfalls that hinder the correct assessment of these structures. Methods In this study, we analyzed synovial fluid (SF) samples of patients with osteoarthritis (OA), rheumatoid arthritis (RA) and juvenile idiopathic arthritis (JIA). To assess factors that may confound MV detection in joint diseases, we used electron microscopy (EM), Nanoparticle Tracking Analysis (NTA) and mass spectrometry (MS). For flow cytometry, a method commonly used for phenotyping and enumeration of MVs, we combined recent advances in the field, and used a novel approach of differential detergent lysis for the exclusion of MV-mimicking non-vesicular signals. Results EM and NTA showed that substantial amounts of particles other than MVs were present in SF samples. Beyond known MV-associated proteins, MS analysis also revealed abundant plasma- and immune complex-related proteins in MV preparations. Applying improved flow cytometric analysis, we demonstrate for the first time that CD3+ and CD8+ T-cell derived SF MVs are highly elevated in patients with RA compared to OA patients (p = 0.027 and p = 0.009, respectively, after Bonferroni corrections). In JIA, we identified reduced numbers of B cell-derived MVs (p = 0.009, after Bonferroni correction). Conclusions Our results suggest that improved flow cytometric assessment of MVs facilitates the detection of previously unrecognized disease-associated vesicular signatures.
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Affiliation(s)
- Bence György
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Hungary
| | - Tamás G. Szabó
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Hungary
| | - Lilla Turiák
- Chemical Research Center of the Hungarian Academy of Sciences, Budapest, Hungary
| | | | - Petra Herczeg
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Hungary
| | - Zsigmond Lédeczi
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Hungary
| | - Ágnes Kittel
- Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary
| | - Anna Polgár
- National Institute of Rheumatology and Physiotherapy, Budapest, Hungary
| | - Kálmán Tóth
- Department of Orthopaedics, University of Szeged, Szeged, Hungary
| | - Beáta Dérfalvi
- 2 Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | - Gergő Zelenák
- Military Hospital, National Health Institute, Department of Orthopaedics, Budapest, Hungary
| | - István Böröcz
- Military Hospital, National Health Institute, Department of Orthopaedics, Budapest, Hungary
| | - Bob Carr
- NanoSight Ltd., Amesbury, United Kingdom
| | - György Nagy
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Hungary
- Department of Rheumatology, Semmelweis University, Budapest, Hungary
| | - Károly Vékey
- Chemical Research Center of the Hungarian Academy of Sciences, Budapest, Hungary
| | - Steffen Gay
- Center for Experimental Rheumatology, Zurich Center for Integrative Human Physiology, USZ, Zurich, Switzerland
| | - András Falus
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Hungary
| | - Edit I. Buzás
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Hungary
- * E-mail:
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Pásztói M, Misják P, György B, Aradi B, Szabó TG, Szántó B, Holub MC, Nagy G, Falus A, Buzás EI. Infection and autoimmunity: Lessons of animal models. Eur J Microbiol Immunol (Bp) 2011; 1:198-207. [PMID: 24516725 DOI: 10.1556/eujmi.1.2011.3.3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2011] [Accepted: 07/11/2011] [Indexed: 12/25/2022] Open
Abstract
While the key initiating processes that trigger human autoimmune diseases remain enigmatic, increasing evidences support the concept that microbial stimuli are among major environmental factors eliciting autoimmune diseases in genetically susceptible individuals. Here, we present an overview of evidences obtained through various experimental models of autoimmunity for the role of microbial stimuli in disease development. Disease onset and severity have been compared in numerous models under conventional, specific-pathogen-free and germ-free conditions. The results of these experiments suggest that there is no uniform scheme that could describe the role played by infectious agents in the experimental models of autoimmunity. While some models are dependent, others prove to be completely independent of microbial stimuli. In line with the threshold hypothesis of autoimmune diseases, highly relevant genetic factors or microbial stimuli induce autoimmunity on their own, without requiring further factors. Importantly, recent evidences show that colonization of germ-free animals with certain members of the commensal flora [such as segmented filamentous bacteria (SFB)] may lead to autoimmunity. These data drive attention to the importance of the complex composition of gut flora in maintaining immune homeostasis. The intriguing observation obtained in autoimmune animal models that parasites often confer protection against autoimmune disease development may suggest new therapeutic perspectives of infectious agents in autoimmunity.
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Turiák L, Misják P, Szabó TG, Aradi B, Pálóczi K, Ozohanics O, Drahos L, Kittel A, Falus A, Buzás EI, Vékey K. Proteomic characterization of thymocyte-derived microvesicles and apoptotic bodies in BALB/c mice. J Proteomics 2011; 74:2025-33. [PMID: 21635979 DOI: 10.1016/j.jprot.2011.05.023] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Revised: 04/29/2011] [Accepted: 05/11/2011] [Indexed: 12/11/2022]
Abstract
Several studies have characterized exosomes derived from different cell sources. In this work we set the goal of proteomic characterization of two less studied populations of membrane vesicles, microvesicles (100-800 nm) and apoptotic bodies (> 800 nm) released by thymus cells of BALB/c mice. The vesicles were isolated by the combination of differential centrifugation and gravity driven multistep filtration of the supernatant of thymus cell cultures. The size distribution of vesicle preparations was determined by transmission electron microscopy. Proteins were released from the vesicles, digested in solution, and analyzed using nano-HPLC/MS(MS). Ingenuity pathway analysis was used to identify functions related to membrane vesicle proteins. In apoptotic bodies and microvesicles we have identified 142 and 195 proteins, respectively. A striking overlap was detected between the proteomic compositions of the two subcellular structures as 108 proteins were detected in both preparations. Identified proteins included autoantigens implicated in human autoimmune diseases, key regulators of T-cell activation, molecules involved in known immune functions or in leukocyte rolling and transendothelial transmigration. The presence and abundance of proteins with high immunological relevance within thymocyte-derived apoptotic bodies and microvesicles raise the possibility that these subcellular structures may substantially modulate T-cell maturation processes within the thymus.
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Affiliation(s)
- Lilla Turiák
- Chemical Research Center of the Hungarian Academy of Sciences, Budapest, Pusztaszeri út 59-67, 1025, Hungary
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György B, Szabó TG, Pásztói M, Pál Z, Misják P, Aradi B, László V, Pállinger E, Pap E, Kittel A, Nagy G, Falus A, Buzás EI. Membrane vesicles, current state-of-the-art: emerging role of extracellular vesicles. Cell Mol Life Sci 2011; 68:2667-88. [PMID: 21560073 PMCID: PMC3142546 DOI: 10.1007/s00018-011-0689-3] [Citation(s) in RCA: 1499] [Impact Index Per Article: 115.3] [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: 01/06/2011] [Revised: 03/30/2011] [Accepted: 04/12/2011] [Indexed: 02/06/2023]
Abstract
Release of membrane vesicles, a process conserved in both prokaryotes and eukaryotes, represents an evolutionary link, and suggests essential functions of a dynamic extracellular vesicular compartment (including exosomes, microparticles or microvesicles and apoptotic bodies). Compelling evidence supports the significance of this compartment in a broad range of physiological and pathological processes. However, classification of membrane vesicles, protocols of their isolation and detection, molecular details of vesicular release, clearance and biological functions are still under intense investigation. Here, we give a comprehensive overview of extracellular vesicles. After discussing the technical pitfalls and potential artifacts of the rapidly emerging field, we compare results from meta-analyses of published proteomic studies on membrane vesicles. We also summarize clinical implications of membrane vesicles. Lessons from this compartment challenge current paradigms concerning the mechanisms of intercellular communication and immune regulation. Furthermore, its clinical implementation may open new perspectives in translational medicine both in diagnostics and therapy.
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Affiliation(s)
- Bence György
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Budapest, Nagyvárad tér, Hungary
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10
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Szabó TG, Palotai R, Antal P, Tokatly I, Tóthfalusi L, Lund O, Nagy G, Falus A, Buzás EI. Critical role of glycosylation in determining the length and structure of T cell epitopes. Immunome Res 2009; 5:4. [PMID: 19778434 PMCID: PMC2760507 DOI: 10.1186/1745-7580-5-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2009] [Accepted: 09/24/2009] [Indexed: 12/02/2022] Open
Abstract
Background Using a combined in silico approach, we investigated the glycosylation of T cell epitopes and autoantigens. The present systems biology analysis was made possible by currently available databases (representing full proteomes, known human T cell epitopes and autoantigens) as well as glycosylation prediction tools. Results We analyzed the probable glycosylation of human T cell epitope sequences extracted from the ImmuneEpitope Database. Our analysis suggests that in contrast to full length SwissProt entries, only a minimal portion of experimentally verified T cell epitopes is potentially N- or O-glycosylated (2.26% and 1.22%, respectively). Bayesian analysis of entries extracted from the Autoantigen Database suggests a correlation between N-glycosylation and autoantigenicity. The analysis of random generated sequences shows that glycosylation probability is also affected by peptide length. Our data suggest that the lack of peptide glycosylation, a feature that probably favors effective recognition by T cells, might have resulted in a selective advantage for short peptides to become T cell epitopes. The length of T cell epitopes is at the intersection of curves determining specificity and glycosylation probability. Thus, the range of length of naturally occurring T cell epitopes may ensure the maximum specificity with the minimal glycosylation probability. Conclusion The findings of this bioinformatical approach shed light on fundamental factors that might have shaped adaptive immunity during evolution. Our data suggest that amino acid sequence-based hypo/non-glycosylation of certain segments of proteins might be substantial for determining T cell immunity/autoimmunity.
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Affiliation(s)
- Tamás G Szabó
- Department of Genetics, Cell- and Immunobiology, Semmelweis University, Nagyvárad tér 4, Budapest, Hungary.
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