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Chayoua W, Yin DM, Kelchtermans H, Moore GW, Gris JC, Musiał J, Zuily S, Ten Cate H, de Laat B, Devreese KMJ. Is There an Additional Value in Detecting Anticardiolipin and Anti-β2 glycoprotein I IgA Antibodies in the Antiphospholipid Syndrome? Thromb Haemost 2020; 120:1557-1568. [PMID: 32696448 DOI: 10.1055/s-0040-1714653] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Anticardiolipin (aCL) and anti-β2 glycoprotein I (aβ2GPI) immunoglobulin A (IgA) antiphospholipid antibodies (aPL) have shown to associate with thrombosis and pregnancy morbidity. However, inclusion of IgA aPL in the classification criteria of the antiphospholipid syndrome (APS) has been debated. We investigated the value of aCL and aβ2GPI IgA aPL in the detection of thrombosis and pregnancy morbidity in addition to the current aPL panel for APS. METHODS We included 1,068 patients from eight European medical centers: 259 thrombotic APS patients, 122 obstetric APS patients, 204 non-APS thrombosis patients, 33 non-APS obstetric patients, 60 APS patients with unspecified clinical manifestations, 196 patients with autoimmune diseases, and 194 controls. aCL and aβ2GPI IgG/M/A were detected with four commercial assays and lupus anticoagulant was determined by the local center. RESULTS Positivity for IgA aPL was found in 17 to 26% of the patients with clinical manifestations of APS and in 6 to 13% of the control population. Both aCL and aβ2GPI IgA were significantly associated with thrombosis and pregnancy morbidity. Isolated IgA positivity was rare in patients with clinical manifestations of APS (0.3-5%) and not associated with thrombosis and/or pregnancy morbidity. Addition of IgA to the current criterion panel did not increase odds ratios for thrombosis nor pregnancy morbidity. CONCLUSION aCL and aβ2GPI IgA are associated with clinical manifestations of APS. However, isolated IgA positivity was rare and not associated with thrombosis or pregnancy morbidity. These data do not support testing for aCL and aβ2GPI IgA subsequent to conventional aPL assays in identifying patients with thrombosis or pregnancy morbidity.
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Affiliation(s)
- Walid Chayoua
- Synapse Research Institute, Maastricht, The Netherlands.,Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Dong-Mei Yin
- Synapse Research Institute, Maastricht, The Netherlands.,Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Hilde Kelchtermans
- Synapse Research Institute, Maastricht, The Netherlands.,Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Gary W Moore
- Department of Haemostasis and Thrombosis, Viapath Analytics, Guy's & St. Thomas' Hospitals, London, United Kingdom
| | - Jean-Christophe Gris
- Centre Hospitalier Universitaire de Nîmes et Université de Montpellier, Nîmes, France.,Ivan Sechenov First Moscow State Medical University, Moscow, Russia
| | - Jacek Musiał
- Department of Internal Medicine, Allergy and Immunology, Jagiellonian University Medical College, Kraków, Poland
| | - Stéphane Zuily
- Vascular Medicine Division and Regional Competence Center for Rare Vascular and Systemic Autoimmune Diseases, Centre Hospitalier Regional Universitaire de Nancy, Université de Lorraine, Inserm, DCAC, Nancy, France
| | - Hugo Ten Cate
- Laboratory of Clinical Thrombosis and Haemostasis, Department of Internal Medicine, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Bas de Laat
- Synapse Research Institute, Maastricht, The Netherlands.,Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Katrien M J Devreese
- Coagulation Laboratory, Department of Diagnostic Sciences, Ghent University Hospital, Gent, Belgium
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2
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Zuily S, de Laat B, Guillemin F, Kelchtermans H, Magy-Bertrand N, Desmurs-Clavel H, Lambert M, Poindron V, de Maistre E, Dufrost V, Risse J, Shums Z, Norman GL, de Groot PG, Lacolley P, Lecompte T, Regnault V, Wahl D. Anti–Domain I β2-Glycoprotein I Antibodies and Activated Protein C Resistance Predict Thrombosis in Antiphospholipid Syndrome: TAC(I)T Study. J Appl Lab Med 2020; 5:1242-1252. [DOI: 10.1093/jalm/jfaa072] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 04/24/2020] [Indexed: 11/13/2022]
Abstract
Abstract
Background
Antibodies binding to domain I of β2-glycoprotein I (aDI) and activated protein C (APC) resistance are associated with an increased risk of thrombosis in cross-sectional studies. The objective of this study was to assess their predictive value for future thromboembolic events in patients with antiphospholipid antibodies (aPL) or antiphospholipid syndrome.
Methods
This prospective multicenter cohort study included consecutive patients with aPL or systemic lupus erythematosus. We followed 137 patients (43.5 ± 15.4 year old; 107 women) for a mean duration of 43.1 ± 20.7 months.
Results
We detected aDI IgG antibodies by ELISA in 21 patients. An APC sensitivity ratio (APCsr) was determined using a thrombin generation–based test. The APCsr was higher in patients with anti–domain I antibodies demonstrating APC resistance (0.75 ± 0.13 vs 0.48 ± 0.20, P < 0.0001). In univariate analysis, the hazard ratio (HR) for thrombosis over time was higher in patients with aDI IgG (3.31 [95% CI, 1.15–9.52]; P = 0.03) and patients with higher APC resistance (APCsr >95th percentile; HR, 6.07 [95% CI, 1.69–21.87]; P = 0.006). A sensitivity analysis showed an increased risk of higher aDI IgG levels up to HR 5.61 (95% CI, 1.93–16.31; P = 0.01). In multivariate analysis, aDI IgG (HR, 3.90 [95% CI, 1.33–11.46]; P = 0.01) and APC resistance (HR, 4.98 [95% CI, 1.36–18.28]; P = 0.02) remained significant predictors of thrombosis over time.
Conclusions
Our study shows that novel tests for antibodies recognizing domain I of β2-glycoprotein I and functional tests identifying APC resistance are significant predictors of thrombosis over time and may be useful for risk stratification.
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Affiliation(s)
- Stephane Zuily
- Nancy University Hospital, Vascular Medicine Division and Regional Competence Center for Rare Vascular and Systemic Autoimmune Diseases, Nancy, France
- Inserm, U1116, Nancy, France
- Nancy University, Nancy, France
- University of Lorraine, Nancy, France
| | - Bas de Laat
- Synapse Research Institute, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, The Netherlands
- Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Francis Guillemin
- University of Lorraine, Nancy, France
- Inserm, CIC-EC CIE1433, Nancy, France
| | - Hilde Kelchtermans
- Synapse Research Institute, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, The Netherlands
- Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, The Netherlands
| | | | | | - Marc Lambert
- CHRU de Lille, Department of Internal Medicine, Lille, France
| | - Vincent Poindron
- CHU de Strasbourg, Internal Medicine and Clinical Immunology Department, Strasbourg, France
| | | | - Virginie Dufrost
- Nancy University Hospital, Vascular Medicine Division and Regional Competence Center for Rare Vascular and Systemic Autoimmune Diseases, Nancy, France
- Inserm, U1116, Nancy, France
- Nancy University, Nancy, France
- University of Lorraine, Nancy, France
| | - Jessie Risse
- Nancy University Hospital, Vascular Medicine Division and Regional Competence Center for Rare Vascular and Systemic Autoimmune Diseases, Nancy, France
- Inserm, U1116, Nancy, France
- Nancy University, Nancy, France
- University of Lorraine, Nancy, France
| | - Zakera Shums
- CHU de Dijon, Hematology Department, Dijon, France
| | | | - Philip G de Groot
- Synapse Research Institute, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, The Netherlands
- Clinical Chemistry and Haematology, University Medical Centre (UMC) Utrecht, Utrecht, The Netherlands
| | - Patrick Lacolley
- Nancy University Hospital, Vascular Medicine Division and Regional Competence Center for Rare Vascular and Systemic Autoimmune Diseases, Nancy, France
- Inserm, U1116, Nancy, France
- Nancy University, Nancy, France
- University of Lorraine, Nancy, France
| | - Thomas Lecompte
- Nancy University Hospital, Hematology Laboratory, Nancy, France
| | - Véronique Regnault
- Nancy University Hospital, Vascular Medicine Division and Regional Competence Center for Rare Vascular and Systemic Autoimmune Diseases, Nancy, France
- Inserm, U1116, Nancy, France
- Nancy University, Nancy, France
- University of Lorraine, Nancy, France
| | - Denis Wahl
- Nancy University Hospital, Vascular Medicine Division and Regional Competence Center for Rare Vascular and Systemic Autoimmune Diseases, Nancy, France
- Inserm, U1116, Nancy, France
- Nancy University, Nancy, France
- University of Lorraine, Nancy, France
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3
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Wan J, Konings J, Yan Q, Kelchtermans H, Kremers R, de Laat B, Roest M. A novel assay for studying the involvement of blood cells in whole blood thrombin generation. J Thromb Haemost 2020; 18:1291-1301. [PMID: 32108990 PMCID: PMC7317846 DOI: 10.1111/jth.14786] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 02/12/2020] [Accepted: 02/20/2020] [Indexed: 12/24/2022]
Abstract
BACKGROUND Fluorogenic thrombin generation (TG) assays are commonly used to determine global coagulation phenotype in plasma. Whole blood (WB)-TG assays reach one step closer to physiology by involving the intrinsic blood cells, but erythrocytes cause variable quenching of the fluorescence signals, hampering its routine application. OBJECTIVE To develop a new assay for continuous WB-TG measurement. METHODS In the new WB-TG assay, the erythrocyte-caused distortion of signal was solved by continuously mixing the sample during the measurement. The assay was validated by evaluating the reproducibility and comparing with the paper-based WB-TG assay. Reconstituted human blood and WB from 119 healthy donors was tested to explore the influences of hematocrit and platelet count on TG. RESULTS This novel WB-TG assay showed good reproducibility while being less affected by contact activation compared with the previous paper-based assay. Reconstitution experiments showed that the lag time of TG was shortened by the addition of platelets but not erythrocytes. Increasing hematocrit strongly augmented the peak thrombin, even in the presence of high platelet counts. The lag time and peak of WB-TG of 119 healthy donors were positively related to erythrocyte count after adjusting for age, sex, and oral contraceptive use with multiple linear regression analyses. The reference range and interindividual variation of WB-TG were determined in the healthy cohort. CONCLUSIONS A novel WB-TG assay was developed, which is a straightforward tool to measure the involvement of platelets and erythrocytes in TG and may assist the research of blood cell-associated coagulation disorders.
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Affiliation(s)
- Jun Wan
- Synapse Research InstituteMaastrichtThe Netherlands
- Cardiovascular Research Institute MaastrichtMaastricht UniversityMaastrichtThe Netherlands
| | - Joke Konings
- Synapse Research InstituteMaastrichtThe Netherlands
- Cardiovascular Research Institute MaastrichtMaastricht UniversityMaastrichtThe Netherlands
| | - Qiuting Yan
- Synapse Research InstituteMaastrichtThe Netherlands
- Cardiovascular Research Institute MaastrichtMaastricht UniversityMaastrichtThe Netherlands
| | - Hilde Kelchtermans
- Synapse Research InstituteMaastrichtThe Netherlands
- Cardiovascular Research Institute MaastrichtMaastricht UniversityMaastrichtThe Netherlands
| | - Romy Kremers
- Synapse Research InstituteMaastrichtThe Netherlands
- Cardiovascular Research Institute MaastrichtMaastricht UniversityMaastrichtThe Netherlands
| | - Bas de Laat
- Synapse Research InstituteMaastrichtThe Netherlands
- Cardiovascular Research Institute MaastrichtMaastricht UniversityMaastrichtThe Netherlands
| | - Mark Roest
- Synapse Research InstituteMaastrichtThe Netherlands
- Cardiovascular Research Institute MaastrichtMaastricht UniversityMaastrichtThe Netherlands
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Belizna C, Meroni PL, Shoenfeld Y, Devreese K, Alijotas-Reig J, Esteve-Valverde E, Chighizola C, Pregnolato F, Cohen H, Fassot C, Mattera PM, Peretti P, Levy A, Bernard L, Saiet M, Lagarce L, Briet M, Rivière M, Pellier I, Gascoin G, Rakotonjanahary J, Borghi MO, Stojanovich L, Djokovic A, Stanisavljevic N, Bromley R, Elefant-Amoura E, Bahi Buisson N, Pindi Sala T, Kelchtermans H, Makatsariya A, Bidsatze V, Khizroeva J, Latino JO, Udry S, Henrion D, Loufrani L, Guihot AL, Muchardt C, Hasan M, Ungeheuer MN, Voswinkel J, Damian L, Pabinger I, Gebhart J, Lopez Pedrera R, Cohen Tervaert JW, Tincani A, Andreoli L. In utero exposure to Azathioprine in autoimmune disease. Where do we stand? Autoimmun Rev 2020; 19:102525. [PMID: 32240856 DOI: 10.1016/j.autrev.2020.102525] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 01/23/2020] [Indexed: 12/19/2022]
Abstract
Azathioprine (AZA), an oral immunosuppressant, is safe during pregnancy. Some reports suggested different impairments in the offspring of mothers with autoimmune diseases (AI) exposed in utero to AZA. These observations are available from retrospective studies or case reports. However, data with respect to the long-term safety in the antenatally exposed child are still lacking. The aim of this study is to summarize the current knowledge in this field and to focus on the need for a prospective study on this population. We performed a PubMed search using several search terms. The actual data show that although the risk of congenital anomalies in offspring, as well as the infertility risk, are similar to those found in general population, there is a higher incidence of prematurity, of lower weight at birth and an intra-uterine delay of development. There is also an increased risk of materno- fetal infections, especially cytomegalovirus infection. Some authors raise the interrogations about neurocognitive impairment. Even though the adverse outcomes might well be a consequence of maternal illness and disease activity, interest has been raised about a contribution of this drug. However, the interferences between the external agent (in utero exposure to AZA), with the host (child genetic susceptibility, immune system anomalies, emotional status), environment (public health, social context, availability of health care), economic, social, and behavioral conditions, cultural patterns, are complex and represent confounding factors. In conclusion, it is necessary to perform studies on the medium and long-term outcome of children born by mothers with autoimmune diseases, treated with AZA, in order to show the safety of AZA exposure. Only large-scale population studies with long-term follow-up will allow to formally conclude in this field. TAKE HOME MESSAGES.
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Affiliation(s)
- Cristina Belizna
- Vascular and Coagulation Department, University Hospital Angers, Angers, France; MITOVASC institute and CARFI facility, University of Angers, UMR CNRS 6015, INSERM U1083, Angers, France; Internal Medicine Department, Clinique de l'Anjou, Angers, France; UMR CNRS 6015, Angers, France; INSERM U1083, Angers, France.
| | - Pier Luigi Meroni
- Clinical Immunology and Rheumatology Research Department Auxologico Institute, Milan, Italy
| | - Yehuda Shoenfeld
- The Zabludowicz Center for Autoimmune Diseases, Affiliated to Sackler Faculty of Medicine, Tel-Aviv University, Israel; I.M. Sechenow First Moscow State Medical University, Moscow, Russia
| | - Katrien Devreese
- Coagulation Laboratory, Department of Clinical Biology, Immunology and Microbiology, Ghent University Hospital, Ghent, Belgium
| | - Jaume Alijotas-Reig
- Systemic Autoimmune Disease Unit, Department of Internal Medicine, Vall d'Hebron University Hospital, Barcelona, Spain; Department of Medicine, Universitat Autonòma, Barcelona, Spain
| | | | - Cecilia Chighizola
- Clinical Immunology and Rheumatology Research Department Auxologico Institute, Milan, Italy
| | - Francesca Pregnolato
- Clinical Immunology and Rheumatology Research Department Auxologico Institute, Milan, Italy
| | - Hannah Cohen
- Haematology Department, University College Hospital, London, UK
| | - Celine Fassot
- Internal Medicine Department, Clinique de l'Anjou, Angers, France
| | - Patrick Martin Mattera
- Faculty of Human and Social Sciences, Laboratory of Research in Psychopathology, 3 place André Leroy, 49008 Angers, France
| | - Pascale Peretti
- Faculty of Human and Social Sciences, Laboratory of Research in Psychopathology, 3 place André Leroy, 49008 Angers, France
| | - Alexandre Levy
- Faculty of Human and Social Sciences, Laboratory of Research in Psychopathology, 3 place André Leroy, 49008 Angers, France
| | - Laurence Bernard
- Faculty of Human and Social Sciences, Laboratory of Research in Psychopathology, 3 place André Leroy, 49008 Angers, France
| | - Mathilde Saiet
- Faculty of Human and Social Sciences, Laboratory of Research in Psychopathology, 3 place André Leroy, 49008 Angers, France
| | - Laurence Lagarce
- Departement of Pharmacovigilance, University Hospital Angers, Angers, France
| | - Marie Briet
- Departement of Pharmacovigilance, University Hospital Angers, Angers, France
| | - Marianne Rivière
- French Lupus and Other Autoimmune Disease Patients Association, AFL+, Cuvry, France
| | - Isabelle Pellier
- Department of Pediatrics, University Hospital Angers, Angers, France
| | - Géraldine Gascoin
- Department of Neonatology, University Hospital Angers, Angers, France
| | | | - Maria Orietta Borghi
- Clinical Immunology and Rheumatology Research Department Auxologico Institute, Milan, Italy
| | - Ljudmila Stojanovich
- Scientific Research Department, Internal Medicine-Rheumatology Bezhanijska Kosa, University Medical Center, Belgrade University, Serbia
| | - Aleksandra Djokovic
- Scientific Research Department, Internal Medicine-Rheumatology Bezhanijska Kosa, University Medical Center, Belgrade University, Serbia
| | - Natasa Stanisavljevic
- Scientific Research Department, Internal Medicine-Rheumatology Bezhanijska Kosa, University Medical Center, Belgrade University, Serbia
| | - Rebecca Bromley
- Manchester University Hospitals NHS Trust, Manchester, UK; Division of Evolution and Genomic Science, School of Biological Sciences, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - Elisabeth Elefant-Amoura
- Genetical and Medical Embriology, CRAT Reference Center on Teratogenic Agents, Paris Est - Hôpital d'Enfants Armand-Trousseau, 26 avenue du Docteur Arnold Netter, 75571 Paris, France
| | - Nadia Bahi Buisson
- Neurology & Neurodevelopmental disorders Department Necker Enfants Malades University Hospital, APHP, Paris 149 Rue de Sèvres, 75015 Paris; INSERM U1163, Hôpital Necker Enfants Malades, 149 rue de Sèvres, 75015 Paris, France; INSERM U1163, Hôpital Necker Enfants Malades, 149 rue de Sèvres, 75015 Paris, France
| | - Taylor Pindi Sala
- EA 7334, Patient Centered Outcomes Research, University Paris Diderot, Paris, France
| | - Hilde Kelchtermans
- Synapse Research Institute, Maastricht, the Netherlands; Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Alexander Makatsariya
- Department of Obstetrics and Gynecology, I.M. Sechenow First Moscow State Medical University, Moscow, Russia
| | - Viktoria Bidsatze
- Department of Obstetrics and Gynecology, I.M. Sechenow First Moscow State Medical University, Moscow, Russia
| | - Jamilya Khizroeva
- Department of Obstetrics and Gynecology, I.M. Sechenow First Moscow State Medical University, Moscow, Russia
| | - Jose Omar Latino
- Autoimmune and thrombophilic disorders Department, Hospital Carlos G. Durand, Buenos Aires, Argentina
| | - Sebastian Udry
- Autoimmune and thrombophilic disorders Department, Hospital Carlos G. Durand, Buenos Aires, Argentina
| | - Daniel Henrion
- Internal Medicine Department, Clinique de l'Anjou, Angers, France
| | - Laurent Loufrani
- Internal Medicine Department, Clinique de l'Anjou, Angers, France
| | | | - Christian Muchardt
- Unit of Epigenetic Regulation, Department of Developmental and Stem Cell Biology, UMR3738 CNRS, Institut Pasteur, Paris, France
| | - Milena Hasan
- Cytometry and Biomarkers Unit of Technology and Service, Center for Translational Science, Institut Pasteur, 28, Rue Doct Roux, 75015 Paris, France
| | - Marie Noelle Ungeheuer
- Clinical Investigation and Acces to Bioresources Department, Institut Pasteur, 28, Rue Doct Roux, 75015 Paris, France
| | - Jan Voswinkel
- Department of Internal Medicine I, Saarland Medical School, University of Saarland, Homburg, Saarland, Germany
| | - Laura Damian
- Department of Rheumatology, County Emergency Hospital Cluj-Napoca, Cluj-Napoca, Romania
| | - Ingrid Pabinger
- Department of Medicine, Division of Hematology and Haemostasis, University Hospital of Vienna, Austria
| | - Johanna Gebhart
- Department of Medicine, Division of Hematology and Haemostasis, University Hospital of Vienna, Austria
| | - Rosario Lopez Pedrera
- Institute Maimónides of Biomedical Investigations, University Hospital Reina Sofía, Cordoba, Spain
| | | | - Angela Tincani
- Rheumatology and Clinical Immunology Unit, University of Brescia, Brescia, Italy; I.M. Sechenow First Moscow State Medical University, Moscow, Russia
| | - Laura Andreoli
- Rheumatology and Clinical Immunology Unit, University of Brescia, Brescia, Italy
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Yin D, Chayoua W, Kelchtermans H, de Groot PG, Moore GW, Gris JC, Zuily S, Musial J, de Laat B, Devreese KMJ. Detection of anti-domain I antibodies by chemiluminescence enables the identification of high-risk antiphospholipid syndrome patients: A multicenter multiplatform study. J Thromb Haemost 2020; 18:463-478. [PMID: 31749277 DOI: 10.1111/jth.14682] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 11/06/2019] [Accepted: 11/08/2019] [Indexed: 12/22/2022]
Abstract
BACKGROUND Classification of the antiphospholipid syndrome (APS) relies predominantly on detecting antiphospholipid antibodies (aPLs). Antibodies against a domain I (DI) epitope of anti-β2glycoprotein I (β2GPI) proved to be pathogenic, but are not included in the current classification criteria. OBJECTIVES Investigate the clinical value of detecting anti-DI IgG in APS. PATIENTS/METHODS From eight European centers 1005 patients were enrolled. Anti-cardiolipin (CL) and anti-β2GPI were detected by four commercially available solid phase assays; anti-DI IgG by the QUANTA Flash® β2GPI domain I assay. RESULTS Odds ratios (ORs) of anti-DI IgG for thrombosis and pregnancy morbidity proved to be higher than those of the conventional assays. Upon restriction to patients positive for anti-β2GPI IgG, anti-DI IgG positivity still resulted in significant ORs. When anti-DI IgG was added to the criteria aPLs or used as a substitute for anti-β2GPI IgG/anti-CL IgG, ORs for clinical symptoms hardly improved. Upon removing anti-DI positive patients, lupus anticoagulant remained significantly correlated with clinical complications. Anti-DI IgG are mainly present in high-risk triple positive patients, showing higher levels. Combined anti-DI and triple positivity confers a higher risk for clinical symptoms compared to only triple positivity. CONCLUSIONS Detection of anti-DI IgG resulted in higher ORs for clinical manifestations than the current APS classification criteria. Regardless of the platform used to detect anti-β2GPI/anti-CL, addition of anti-DI IgG measured by QUANTA Flash® did not improve the clinical associations, possibly due to reduced exposure of the pathogenic epitope of DI. Our results demonstrate that anti-DI IgG potentially helps in identifying high-risk patients.
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Affiliation(s)
- Dongmei Yin
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, the Netherlands
- Synapse Research Institute, Maastricht, the Netherlands
| | - Walid Chayoua
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, the Netherlands
- Synapse Research Institute, Maastricht, the Netherlands
| | - Hilde Kelchtermans
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, the Netherlands
- Synapse Research Institute, Maastricht, the Netherlands
| | | | - Gary W Moore
- Viapath Analytics, Department of Haemostasis and Thrombosis, Guy's and St Thomas' Hospitals, London, UK
| | - Jean-Christophe Gris
- Department of Haematology, University Hospital of Nîmes and University of Montpellier, Montpellier, France
- Ivan Sechenov First Moscow State Medical University, Moscow, Russia
| | - Stéphane Zuily
- Inserm, DCAC, Vascular Medicine Division and Regional Competence Center for Rare Vascular and Systemic Autoimmune Diseases, Centre Hospitalier Regional Universitaire de Nancy, Université de Lorraine, Nancy, France
| | - Jacek Musial
- Department of Internal Medicine, Allergy and Immunology, Jagiellonian University Medical College, Kraków, Poland
| | - Bas de Laat
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, the Netherlands
- Synapse Research Institute, Maastricht, the Netherlands
| | - Katrien M J Devreese
- Coagulation Laboratory, Department of Laboratory Medicine, Ghent University Hospital, Department of Diagnostic Sciences, Ghent University, Ghent, Belgium
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6
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Chayoua W, Kelchtermans H, Gris JC, Moore GW, Musiał J, Wahl D, de Groot PG, de Laat B, Devreese KMJ. The (non-)sense of detecting anti-cardiolipin and anti-β2glycoprotein I IgM antibodies in the antiphospholipid syndrome. J Thromb Haemost 2020; 18:169-179. [PMID: 31519058 DOI: 10.1111/jth.14633] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [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: 05/01/2019] [Revised: 08/15/2019] [Accepted: 09/09/2019] [Indexed: 01/15/2023]
Abstract
BACKGROUND The antiphospholipid syndrome (APS) is characterized by thrombosis and/or pregnancy morbidity with the persistent presence of lupus anticoagulant (LAC), anti-cardiolipin (aCL) and/or anti-β2glycoprotein I (aβ2GPI) antibodies of the immunoglobulin G/immunoglobulin M (IgG/IgM) isotype. However, the role of aCL and aβ2GPI IgM as a serologic marker in APS is debated. OBJECTIVES We aimed to assess the diagnostic and clinical value of IgM antiphospholipid antibodies (aPL) in APS within the classification criteria. PATIENTS/METHODS Our multicenter study comprised 1008 patients, including APS patients and controls. Anti-CL and aβ2GPI IgG and IgM antibodies were detected with four commercially available solid phase assays. RESULTS Positivity for aCL and/or aβ2GPI antibodies was significantly correlated with thrombosis and pregnancy morbidity, independent of the isotype and solid phase assay. Higher odds ratios were obtained for IgG compared to IgM positivity. Isolated IgM was rare in thrombotic APS, but more frequent in obstetric APS, ranging from 3.5% to 5.4% and 5.7% to 12.3%, respectively, dependent on the solid phase assay. In a multivariate logistic regression analysis of aPL, IgM positivity was found to be associated with pregnancy morbidity. However, detection of IgM was not independently associated with thrombosis. Combined positivity for LAC, IgG, and IgM was highly associated with thrombosis and pregnancy morbidity. CONCLUSIONS Our data support testing for aCL and aβ2GPI IgM in women suspected of obstetric APS. However, no added value was found for testing IgM in patients suspected of thrombotic APS. Still, IgM aPL might be useful as a second-line test to improve thrombotic risk stratification.
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Affiliation(s)
- Walid Chayoua
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, the Netherlands
- Synapse Research Institute, Maastricht, the Netherlands
| | - Hilde Kelchtermans
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, the Netherlands
- Synapse Research Institute, Maastricht, the Netherlands
| | - Jean-Christophe Gris
- Centre Hospitalier Universitaire de Nîmes et Université de Montpellier, Montpellier, France
- Ivan Sechenov First Moscow State Medical University, Moscow, Russia
| | - Gary W Moore
- Department of Haemostasis & Thrombosis, Guy's & St. Thomas' Hospitals, London, UK
| | - Jacek Musiał
- Jagiellonian University Medical College, Krakow, Poland
| | - Denis Wahl
- DCAC, Vascular Medicine Division and Regional Competence Center for Rare Vascular and Systemic Autoimmune Diseases, Inserm, Centre Hospitalier Regional Universitaire de Nancy, Université de Lorraine, Nancy, France
| | | | - Bas de Laat
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, the Netherlands
- Synapse Research Institute, Maastricht, the Netherlands
| | - Katrien M J Devreese
- Department of Diagnostic Sciences, Coagulation Laboratory, Ghent University Hospital, Ghent, Belgium
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Vanoverschelde L, Kelchtermans H, Musial J, de Laat B, Devreese KMJ. Influence of anticardiolipin and anti-β2 glycoprotein I antibody cutoff values on antiphospholipid syndrome classification. Res Pract Thromb Haemost 2019; 3:515-527. [PMID: 31294336 PMCID: PMC6611479 DOI: 10.1002/rth2.12207] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 03/05/2019] [Accepted: 03/13/2019] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND Anticardiolipin (aCL) and anti-β2 glycoprotein I (aβ2GPI) immunoglobulin (Ig) G/IgM antibodies are 2 of the 3 laboratory criteria for classification of antiphospholipid syndrome (APS). The threshold for clinically relevant levels of antiphospholipid antibodies (aPL) for the diagnosis of APS remains a matter of debate. The aim of this study was to evaluate the variation in cutoffs as determined in different clinical laboratories based on the results of a questionnaire as well as to determine the optimal method for cutoff establishment based on a clinical approach. METHODS The study included samples from 114 patients with thrombotic APS, 138 patients with non-APS thrombosis, 138 patients with autoimmune disease, and 183 healthy controls. aCL and aβ2GPI IgG/IgM antibodies were measured at 1 laboratory using 4 commercial assays. Assay-specific cutoff values for aPL were obtained by determining 95th and 99th percentiles of 120 compared to 200 normal controls by different statistical methods. RESULTS Normal reference value data showed a nonparametric distribution. Higher cutoff values were found when calculated as 99th rather than 95th percentiles. These values also showed a stronger association with thrombosis. The use of 99th percentile cutoffs reduced the chance of false positivity but at the same time reduced sensitivity. The decrease in sensitivity was higher than the gain in specificity when 99th percentiles were calculated by methods wherein no outliers were eliminated. CONCLUSIONS We present cutoff values for aPL determined by different statistical methods. The 99th percentile cutoff value seemed more specific. However, our findings indicate the need for standardized statistical criteria to calculate 99th percentile cutoff reference values.
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Affiliation(s)
- Laura Vanoverschelde
- Coagulation LaboratoryDepartment of Laboratory MedicineGhent University HospitalGhentBelgium
| | - Hilde Kelchtermans
- Synapse Research InstituteMaastrichtThe Netherlands
- Department of BiochemistryMaastricht UniversityCardiovascular Research Institute MaastrichtMaastrichtThe Netherlands
| | - Jacek Musial
- Department of MedicineJagiellonian University Medical CollegeKrakowPoland
| | - Bas de Laat
- Synapse Research InstituteMaastrichtThe Netherlands
- Department of BiochemistryMaastricht UniversityCardiovascular Research Institute MaastrichtMaastrichtThe Netherlands
| | - Katrien M. J. Devreese
- Coagulation LaboratoryDepartment of Laboratory MedicineGhent University HospitalGhentBelgium
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Chayoua W, Kelchtermans H, Moore GW, Gris JC, Musial J, Wahl D, Zuily S, Gianniello F, Fontana P, Remijn J, Urbanus RT, de Laat B, Devreese KMJ. Detection of Anti-Cardiolipin and Anti-β2glycoprotein I Antibodies Differs between Platforms without Influence on Association with Clinical Symptoms. Thromb Haemost 2019; 119:797-806. [PMID: 30822809 DOI: 10.1055/s-0039-1679901] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
BACKGROUND The anti-phospholipid syndrome (APS) is characterized by thrombosis and/or pregnancy morbidity with persistent presence of anti-phospholipid antibodies (aPL). Laboratory criteria include aPL detection by coagulation tests for lupus anticoagulant (LAC) or solid phase assays measuring anti-β2 glycoprotein I (aβ2GPI) or anti-cardiolipin (aCL) immunoglobulin (Ig) G/IgM antibodies. External quality control programs illustrate that commercially available aPL assays produce variable results. OBJECTIVE We aimed to investigate the agreement and diagnostic accuracy of solid phase assays. MATERIALS AND METHODS In this multi-centre study, 1,168 patient samples were tested on one site for aCL and aβ2GPI IgG/IgM antibodies by four solid phase test systems. Samples included APS patients, controls and monoclonal antibodies (MoAB) against different epitopes of β2GPI. LAC was determined by the local centre. RESULTS aCL IgM assays resulted in the most discrepancies (60%), while aCL IgG and aβ2GPI IgM assays resulted in lower discrepancies (36%), suggesting better agreement. Discrepant samples displayed lower median aPL titers. Dependent on the solid phase test system, odds ratios (ORs) for thrombosis and pregnancy morbidity ranged from 1.98 to 2.56 and 3.42 to 4.78, respectively. Three platforms showed lower sensitivity for MoAB directed against the glycine (Gly) 40-arginine (Arg) 43 epitope of domain I of β2GPI. CONCLUSION Poor agreement was observed between different commercially available aCL and aβ2GPI IgG/IgM assays, hampering uniformity in the identification of aPL-positive patients. Clinical association was globally concordant between solid phase test systems considering results of the four aPL together. An assay sensitive in detecting the MoAB against Gly40-Arg43 of domain I of β2GPI reached the highest OR for thrombosis.
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Affiliation(s)
- Walid Chayoua
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht University, Maastricht, The Netherlands.,Synapse Research Institute, Maastricht, The Netherlands
| | - Hilde Kelchtermans
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht University, Maastricht, The Netherlands.,Synapse Research Institute, Maastricht, The Netherlands
| | - Gary W Moore
- Department of Haemostasis and Thrombosis, Viapath Analytics, Guy's & St. Thomas' Hospitals, London, United Kingdom
| | - Jean-Christophe Gris
- Centre Hospitalier Universitaire de Nîmes et Université de Montpellier, Montpellier, France.,Ivan Sechenov First Moscow State Medical University, Moscow, Russia
| | - Jacek Musial
- 2nd Department of Internal Medicine, Jagiellonian University Medical College, Jagiellonian University, Krakow, Poland
| | - Denis Wahl
- Vascular Medicine Division and Regional Competence Center for Rare Vascular and Systemic Autoimmune Diseases, Centre Hospitalier Regional Universitaire de Nancy, Université de Lorraine, Inserm, DCAC, Nancy, France
| | - Stéphane Zuily
- Vascular Medicine Division and Regional Competence Center for Rare Vascular and Systemic Autoimmune Diseases, Centre Hospitalier Regional Universitaire de Nancy, Université de Lorraine, Inserm, DCAC, Nancy, France
| | - Francesca Gianniello
- Angelo Bianchi Bonomi Hemophilia and Thrombosis Center, Fondazione IRCCS Ca' Granda-Ospedale Maggiore Policlinico, Milan, Italy
| | - Pierre Fontana
- Division of Angiology and Haemostasis, University Hospital Geneva, University of Geneva, Geneva, Switzerland
| | - Jasper Remijn
- Department of Clinical Chemistry and Hematology, Gelre Hospitals, Apeldoorn, The Netherlands
| | - Rolf T Urbanus
- Department of Clinical Chemistry and Haematology, Center for Circulatory Health, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Bas de Laat
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht University, Maastricht, The Netherlands.,Synapse Research Institute, Maastricht, The Netherlands
| | - Katrien M J Devreese
- Coagulation Laboratory, Department of Diagnostic Sciences, Ghent University Hospital, Ghent University, Ghent, Belgium
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Mohamed ABO, Kelchtermans H, Konings J, van Daal J, Al Marzouki A, Harakeh S, de Laat B. The effects of oral contraceptive usage on thrombin generation and activated protein C resistance in Saudi women, with a possible impact of the body mass index. PLoS One 2018; 13:e0206376. [PMID: 30359453 PMCID: PMC6201944 DOI: 10.1371/journal.pone.0206376] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 10/11/2018] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND AND OBJECTIVES The effect of oral contraceptive (OC) usage on coagulation has been studied worldwide. However, no such studies have been conducted in Saudi Arabia on Saudi women using OCs. The aim of this study was to investigate the effects of OC-induced changes of thrombin generation (TG) in the absence and presence of activated protein C (APC) or thrombomodulin (TM) in Saudi women. METHODS A total of 115 adult women, 47 on oral contraception (OC users) and 68 controls (not using OCs) were recruited from the obstetrics-gynecology outpatient clinic in Saudi Arabia. OCs that were used in this study include the following: Marvelon, Gynera, Cerrazetem, Yasmine, Microlut, Gracial and Diane. The plasma calibrated automated thrombinography (CAT) was used to determine TG which was expressed as endogenous thrombin potential (ETP; nM/min), lag time (min), peak (nM) and time-to-peak (ttpeak; min). In the presence of TM or APC, TG parameters were expressed relative to the parameters in the absence of TM or APC. RESULTS AND CONCLUSION As in other populations, our study demonstrated that OC usage induced prothrombotic changes in plasma of Saudi women, including resistance to the inhibitory actions of TM and APC. More specifically, OC usage in our population predominantly influenced TG and APC/TM sensitivity in overweight and obese individuals, a finding that needs confirmation in large cohort studies. The effects of APC and TM on TG parameters showed a positive association, and the correlation coefficients were higher in OC users for both ETP and peak values.
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Affiliation(s)
- Abdulrahman B. O. Mohamed
- Department of Pharmacology, King Abdul-Aziz University, Jeddah, Saudi Arabia
- Synapse Research Institute, Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, the Netherlands
| | - Hilde Kelchtermans
- Synapse Research Institute, Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, the Netherlands
- Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, the Netherlands
| | - Joke Konings
- Synapse Research Institute, Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, the Netherlands
- Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, the Netherlands
| | - Jamilla van Daal
- Synapse Research Institute, Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, the Netherlands
| | - Anas Al Marzouki
- Department of Obstetrics Gynecology, King Abdul-Aziz University, Jeddah, Saudi Arabia
| | - Steve Harakeh
- Special Infectious Agents Unit, King Fahd Medical Research Center, King Abdul-Aziz University, Jeddah, Saudi Arabia
| | - Bas de Laat
- Synapse Research Institute, Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, the Netherlands
- Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, the Netherlands
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Yin D, de Laat B, Devreese KMJ, Kelchtermans H. The clinical value of assays detecting antibodies against domain I of β2-glycoprotein I in the antiphospholipid syndrome. Autoimmun Rev 2018; 17:1210-1218. [PMID: 30316989 DOI: 10.1016/j.autrev.2018.06.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [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: 06/12/2018] [Accepted: 06/18/2018] [Indexed: 02/07/2023]
Abstract
As the clinical symptoms of the antiphospholipid syndrome (APS) frequently occur irrespective of the syndrome, diagnosis predominantly depends on the laboratory assays measuring the level or function of antiphospholipid antibodies (aPLs). β2-glycoprotein I (β2GPI) is increasingly accepted as the most important target of aPLs. Anti-β2GPI antibodies constitute a heterogeneous population, but current in vivo and in vitro evidence show that especially the first domain (DI) of β2GPI contains an important pathogenic epitope. This epitope containing Glycine40-Arginine43 (G40-R43) has proven to be cryptic and only exposed when β2GPI is in its open conformation. A previous study demonstrated a highly variable exposure of the cryptic epitope in commercial anti-β2GPI assays, with implications on correct patient classification. Unexpectedly, recent unpublished data revealed impaired exposure of the pathogenic epitope in the commercially available anti-DI chemiluminescence immunoassay (CIA) assay detecting specific antibodies directed to DI. In this review we summarize the laboratory and clinical performance characteristics of the different anti-DI assays in published data and conclude with inconsistent results for both the correlation of anti-DI antibodies with clinical symptoms and the added value of anti-DI antibodies in the classification criteria of APS. Additionally, we hypothesize on possible explanations for the observed discrepancies. Finally, we highly advise manufacturers to use normal pooled plasma spiked with the monoclonal anti-DI antibodies to verify correct exposure of the cryptic epitope.
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Affiliation(s)
- Dongmei Yin
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, the Netherlands,; Synapse Research Institute, Maastricht, the Netherlands.
| | - Bas de Laat
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, the Netherlands,; Synapse Research Institute, Maastricht, the Netherlands.
| | - Katrien M J Devreese
- Coagulation Laboratory, Department of Laboratory Medicine, Ghent University Hospital, Department of Diagnostic Sciences, Ghent University, Ghent, Belgium.
| | - Hilde Kelchtermans
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, the Netherlands,; Synapse Research Institute, Maastricht, the Netherlands.
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11
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Chayoua W, Kelchtermans H, Moore GW, Musiał J, Wahl D, de Laat B, Devreese KMJ. Identification of high thrombotic risk triple-positive antiphospholipid syndrome patients is dependent on anti-cardiolipin and anti-β2glycoprotein I antibody detection assays. J Thromb Haemost 2018; 16:2016-2023. [PMID: 30079628 DOI: 10.1111/jth.14261] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Indexed: 12/31/2022]
Abstract
Essentials Triple-positivity is associated with a high risk for a first thrombotic event and recurrence. Identification of triple-positives is dependent on the solid phase assay used. In triple-positivity, IgM only adds value in thrombotic risk stratification together with IgG. Thrombotic risk in triple-positive patients with IgM only, depends on the platform. ABSTRACT Background The antiphospholipid syndrome (APS) is characterized by thrombosis and/or pregnancy morbidity with the persistent presence of antiphospholipid antibodies (aPL). Triple-positivity (i.e. positivity for lupus anticoagulant [LAC], anti-cardiolipin [aCL] and anti-β2glycoprotein I [aβ2GPI] antibodies) is associated with a high thrombotic risk. Objectives We investigated the variability in triple-positivity detection by measuring the same samples with four commercially available solid phase assays. In addition, the added clinical value of aPL in LAC-positive patients was investigated, as well as the association of IgM triple-positivity and thrombosis. Patients/Methods We included 851 patients from seven European medical centers. Anti-CL and aβ2GPI IgG/IgM antibodies were determined by four platforms: BioPlex® 2200, ImmunoCap® EliA, ACL AcuStar® and QUANTA Lite ELISA® . Results Triple-positivity detection by solid phase assays varied, ranging from 89 up to 118 in thrombotic APS patients (n = 258), of which 86 were detected independent of the platform. Lupus anticoagulant positivity resulted in an odds ratio (OR) for thrombosis of 3.4; triple-positivity (irrespective of the isotype) increased the OR from 4.3 up to 5.2, dependent on the platform. Triple-positivity solely for the IgM isotype did not increase the OR for thrombosis compared with LAC positivity. The highest OR for thrombosis was reached for positivity for IgG and IgM aβ2GPI and aCL (8.6 up to 28.9). Conclusions Triple-positivity proved to be highly associated with thrombosis, but identification is assay dependent. Within triple-positivity, IgM antibodies only have an added clinical value in patients positive for IgG antibodies.
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Affiliation(s)
- W Chayoua
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, the Netherlands
- Synapse Research Institute, Maastricht, the Netherlands
| | - H Kelchtermans
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, the Netherlands
- Synapse Research Institute, Maastricht, the Netherlands
| | - G W Moore
- Viapath Analytics, Department of Haemostasis and Thrombosis, Guy's and St Thomas' Hospitals, London, UK
| | - J Musiał
- Department of Internal Medicine, Allergy and Immunology, Jagiellonian University Medical College, Kraków, Poland
| | - D Wahl
- Inserm, DCAC, Vascular Medicine Division and Regional Competence Center for Rare Vascular and Systemic Autoimmune Diseases, Centre Hospitalier Regional Universitaire de Nancy, Université de Lorraine, Nancy, France
| | - B de Laat
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, the Netherlands
- Synapse Research Institute, Maastricht, the Netherlands
| | - K M J Devreese
- Coagulation Laboratory, Department of Diagnostic Sciences, Ghent University Hospital, Gent, Belgium
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12
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Abstract
Accurate thrombin generation determination by calibrated automated thrombinography can be sustained when reducing the plasma and reagent volumes up to half, but not for higher reductions or plasma dilutions.
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Affiliation(s)
- Saartje Bloemen
- Synapse Research Institute, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, the Netherlands.,2Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Hilde Kelchtermans
- Synapse Research Institute, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, the Netherlands.,2Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, the Netherlands
| | - H Coenraad Hemker
- Synapse Research Institute, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, the Netherlands.,2Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, the Netherlands
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Abstract
AbstractExercise is protective against cardiovascular disease, but can also provoke sudden cardiac death, a phenomenon referred to as “the exercise paradox.” Extreme exertion is known to induce a rebalanced hemostatic state by causing hypercoagulability and concomitantly enhanced fibrinolysis. Over the past decade, novel techniques for quantifying hemostasis have been introduced, which may provide new insights into this process. This review summarizes recent literature on the effect of extreme exertion of both short and long duration on coagulation, fibrinolysis, and recovery of hemostatic balance. Extreme exertion introduces a temporary hypercoagulable state, mainly through upregulation of the contact pathway by increased FVIII levels. Additionally, von Willebrand factor levels and platelet activation are increased. Simultaneously, increased fibrinolysis results from increased tissue-type plasminogen activator levels, suggesting a rebalanced hemostasis. The vascular endothelium appears to play a pivotal role in both processes. Data on the effect of exercise on endogenous anticoagulants are scarce. Hypercoagulability persists for hours to a day after prolonged extreme exertion, while fibrinolytic parameters appear to return to baseline levels more quickly. Hence, the balance in the rebalanced hemostatic state may be lost during recovery. Training induces lower amplitude of the hypercoagulable response, and quicker recuperation toward baseline. Repetitive exercise exhausts the endothelium, attenuating procoagulant changes. Additional research is needed to identify if the hemostatic balance is lost during recovery, and if so, when the shift toward thrombosis appears. Moreover, differences between sexes need to be addressed, since women are known to have a different pathophysiological mechanism behind cardiovascular events, but are underrepresented in recent literature.
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Affiliation(s)
- Adam Miszta
- Synapse Research Institute, Maastricht, The Netherlands
- Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, School of Medicine, Chapel Hill
| | - Hilde Kelchtermans
- Synapse Research Institute, Maastricht, The Netherlands
- Cardiovascular Research Institute Maastricht, Department of Biochemistry, Maastricht University, Maastricht, The Netherlands
| | - Bas De Laat
- Synapse Research Institute, Maastricht, The Netherlands
- Cardiovascular Research Institute Maastricht, Department of Biochemistry, Maastricht University, Maastricht, The Netherlands
| | - Cécile Kicken
- Department of Anesthesiology and Pain Therapy, Maastricht University Medical Center, Maastricht, The Netherlands
- Synapse Research Institute, Maastricht, The Netherlands
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14
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Meesters MI, Veerhoek D, de Lange F, de Vries JW, de Jong JR, Romijn JWA, Kelchtermans H, Huskens D, van der Steeg R, Thomas PWA, Burtman DTM, van Barneveld LJM, Vonk ABA, Boer C. Effect of high or low protamine dosing on postoperative bleeding following heparin anticoagulation in cardiac surgery. Thromb Haemost 2018; 116:251-61. [DOI: 10.1160/th16-02-0117] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 05/06/2016] [Indexed: 11/05/2022]
Abstract
SummaryWhile experimental data state that protamine exerts intrinsic anticoagulation effects, protamine is still frequently overdosed for heparin neutralisation during cardiac surgery with cardiopulmonary bypass (CPB). Since comparative studies are lacking, we assessed the influence of two protamine-to-heparin dosing ratios on perioperative haemostasis and bleeding, and hypothesised that protamine overdosing impairs the coagulation status following cardiac surgery. In this open-label, multicentre, single-blinded, randomised controlled trial, patients undergoing on-pump coronary artery bypass graft surgery were assigned to a low (0.8; n=49) or high (1.3; n=47) protamine-to-heparin dosing group. The primary outcome was 24-hour blood loss. Patient haemostasis was monitored using rotational thromboelastometry and a thrombin generation assay. The low protamine-to-heparin dosing ratio group received less protamine (329 ± 95 vs 539 ± 117 mg; p<0.001), while post-protamine activated clotting times were similar among groups. The high dosing group revealed increased intrinsic clotting times (236 ± 74 vs 196 ± 64 s; p=0.006) and the maximum post-protamine thrombin generation was less suppressed in the low dosing group (38 ± 40% vs 6 ± 9%; p=0.001). Postoperative blood loss was increased in the high dosing ratio group (615 ml; 95% CI 500–830 ml vs 470 ml; 95% CI 420–530 ml; p=0.021) when compared to the low dosing group, respectively. More patients in the high dosing group received fresh frozen plasma (11% vs 0%; p=0.02) and platelet concentrate (21% vs 6%; p=0.04) compared to the low dosing group. Our study confirms in vitro data that abundant protamine dosing is associated with increased postoperative blood loss and higher transfusion rates in cardiac surgery.
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Huskens D, Sang Y, Konings J, van der Vorm L, de Laat B, Kelchtermans H, Roest M. Standardization and reference ranges for whole blood platelet function measurements using a flow cytometric platelet activation test. PLoS One 2018; 13:e0192079. [PMID: 29389990 PMCID: PMC5794146 DOI: 10.1371/journal.pone.0192079] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 01/16/2018] [Indexed: 01/19/2023] Open
Abstract
Introduction Platelet function testing with flow cytometry has additional value to existing platelet function testing for diagnosing bleeding disorders, monitoring anti-platelet therapy, transfusion medicine and prediction of thrombosis. The major challenge is to use this technique as a diagnostic test. The aim of this study is to standardize preparation, optimization and validation of the test kit and to determine reference values in a population of 129 healthy individuals. Methods Platelet function tests with 3 agonists and antibodies against P-selectin, activated αIIbβ3 and glycoprotein Ib (GPIb), were prepared and stored at -20°C until used. Diluted whole blood was added and platelet activation was quantified by the density of activation markers, using flow cytometry. Anti-mouse Ig κ particles were included to validate stability of the test and to standardize results. Reference intervals were determined. Results Blood stored at room temperature (RT) for up to 4h after blood donation and preheated/tested at 37°C resulted in stable results (%CV<10%), in contrast to measuring at RT. The intra-assay %CV was <5%. Incubation of anti-mouse Ig κ particles with antibodies stored for up to 12 months proved to give a stable fluorescence. The inter-individual variation measured in the 129 individuals varied between 23% and 37% for P-selectin expression and αIIbβ3 activation, respectively. Conclusions The current study contributes to the translation of flow cytometry based platelet function testing from a scientific tool to a diagnostic test. Platelet function measurements, using prepared and stored platelet activation kits, are reproducible if executed at 37°C. The reference ranges can be validated in clinical laboratories and ongoing studies are investigating if reduced platelet reactivity in patients with bleeding complications can be detected.
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Affiliation(s)
- Dana Huskens
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, the Netherlands
- Synapse Research Institute, Maastricht, the Netherlands
- * E-mail:
| | - Yaqiu Sang
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, the Netherlands
- Synapse Research Institute, Maastricht, the Netherlands
| | - Joke Konings
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, the Netherlands
- Synapse Research Institute, Maastricht, the Netherlands
| | - Lisa van der Vorm
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, the Netherlands
- Synapse Research Institute, Maastricht, the Netherlands
- Department of Clinical Chemistry and Hematology, Gelre Hospitals, Apeldoorn, The Netherlands
| | - Bas de Laat
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, the Netherlands
- Synapse Research Institute, Maastricht, the Netherlands
| | - Hilde Kelchtermans
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, the Netherlands
- Synapse Research Institute, Maastricht, the Netherlands
| | - Mark Roest
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, the Netherlands
- Synapse Research Institute, Maastricht, the Netherlands
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Kelchtermans H, Chayouâ W, Laat BD. The Significance of Antibodies against Domain I of Beta-2 Glycoprotein I in Antiphospholipid Syndrome. Semin Thromb Hemost 2017; 44:458-465. [PMID: 28719914 DOI: 10.1055/s-0037-1601329] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The antiphospholipid syndrome (APS) is characterized by vascular thrombosis and/or pregnancy morbidity with the persistent presence of antiphospholipid antibodies (aPLs). Progress is being made in understanding the pathogenesis of the syndrome, but difficulties persist in the identification of patients at risk for thrombosis and/or pregnancy morbidity. Beta-2 glycoprotein I (β2GPI), a plasma protein consisting of five sushi domains, is thought to be the main antigenic target of aPLs. Antibodies recognizing domain I of β2GPI are predominantly present in patients with an elevated risk of thrombosis, whereas antidomain IV/V antibodies are found in nonthrombotic autoimmune diseases. Indeed, domain I antibodies proved to be pathogenic in multiple studies. Retrospective studies have provided evidence for an added clinical value of antidomain I antibodies in the risk stratification of patients with APS. Still, wide ranges of odds ratio exist between studies, probably due to differences in the study and control population, and detection methods used. Despite the proven pathogenicity of antidomain I antibodies and their correlations with clinical manifestations of APS, heterogeneity of the current studies has prohibited their acceptance in the official diagnostic criteria. Well-designed large longitudinal prospective studies with available and new, preferentially functional, assays for the risk stratification of patients with APS are required.
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Affiliation(s)
- Hilde Kelchtermans
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, The Netherlands.,Synapse BV, Maastricht, The Netherlands
| | - Walid Chayouâ
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, The Netherlands.,Synapse BV, Maastricht, The Netherlands
| | - Bas de Laat
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, The Netherlands.,Synapse BV, Maastricht, The Netherlands
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Bloemen S, Huskens D, Konings J, Kremers RM, Miszta A, de Laat B, Kelchtermans H. Interindividual Variability and Normal Ranges of Whole Blood and Plasma Thrombin Generation. ACTA ACUST UNITED AC 2017; 2:150-164. [DOI: 10.1373/jalm.2017.023630] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 05/02/2017] [Indexed: 11/06/2022]
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Moorlag M, Schurgers E, Krishnamoorthy G, Bouwhuis A, Lindhout T, Kelchtermans H, Lance MD, de Laat B. Near-Patient Thrombin Generation in Patients Undergoing Elective Cardiac Surgery. ACTA ACUST UNITED AC 2017; 1:613-625. [DOI: 10.1373/jalm.2016.022335] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 01/05/2017] [Indexed: 11/06/2022]
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Kelchtermans H, Pelkmans L, de Laat B, Devreese KM. IgG/IgM antiphospholipid antibodies present in the classification criteria for the antiphospholipid syndrome: a critical review of their association with thrombosis. J Thromb Haemost 2016; 14:1530-48. [PMID: 27279342 DOI: 10.1111/jth.13379] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [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: 01/12/2016] [Indexed: 01/08/2023]
Abstract
UNLABELLED Essentials The clinical value of IgM antibodies in thrombotic antiphospholipid syndrome (APS) is debated. By review of literature, we reconsidered the clinical value of IgM antibodies in thrombotic APS. More significant correlations with thrombosis were found for the IgG compared to IgM isotype. Unavailability of paired IgG/IgM results hampers evaluating the added value of IgM positivity. Click to hear Dr de Groot's perspective on antiphospholipid syndrome SUMMARY Background Despite the update of the classification criteria for the antiphospholipid syndrome (APS), difficulties persist in the identification of patients at risk for thrombosis. Current guidelines include assays detecting IgG/IgM anti-β2 -glycoprotein I and anti-cardiolipin antibodies, although the relevance of IgM antibodies has been debated. Objectives Through a review of the literature from 2001 to 2014, we aimed to formally establish the thrombotic risk stratification potential of IgM as compared with IgG anti-phospholipid antibodies (aPLs). Patients/methods One thousand two hundred and twenty-eight articles were selected by a computer-assisted search of the literature. Of the 177 studies that met our inclusion criteria, the clinical value of IgG/IgM aPLs was established through analysis of odds ratios for thrombosis or percentage of positives in the thrombotic population. Results/conclusions We clearly found more significant correlations with thrombosis for the IgG than for the IgM isotype. Nonetheless, in a minority of studies, significant associations with thrombosis were found for IgM but not IgG antibodies. The unavailability of paired results of IgG and IgM for each separate patient hampers evaluation of the added value of isolated IgM positivity. To fully take advantage of results obtained by future studies, we strongly encourage scientists to provide all studied information per patient. We planned a large multicenter study to investigate clinical associations of isolated/combined positivity for criteria/non-criteria aPLs. Importantly, because of the presence of non-pathogenic aPLs, quantitative assays are characterized by a high false-positivity rate. Optimization of functional assays, such as thrombin generation measuring the whole scheme of coagulation, may help to reduce APS-related morbidity and mortality.
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Affiliation(s)
- H Kelchtermans
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, the Netherlands
- Synapse BV, Maastricht, the Netherlands
| | - L Pelkmans
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, the Netherlands
- Synapse BV, Maastricht, the Netherlands
| | - B de Laat
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, the Netherlands
- Synapse BV, Maastricht, the Netherlands
| | - K M Devreese
- Coagulation Laboratory, Department of Clinical Chemistry, Microbiology and Immunology, Ghent University Hospital, Ghent, Belgium
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Kelchtermans H, Pelkmans L, Bouwhuis A, Schurgers E, Lindhout T, Huskens D, Miszta A, Hemker HC, Lancé MD, de Laat B. Simultaneous measurement of thrombin generation and fibrin formation in whole blood under flow conditions. Thromb Haemost 2016; 116:134-45. [PMID: 27074907 DOI: 10.1160/th15-10-0801] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [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: 10/15/2015] [Accepted: 03/28/2016] [Indexed: 11/05/2022]
Abstract
Assays based on the formation of thrombin and fibrin are frequently used, and results are considered exchangeable in research/clinical settings. However, thrombin generation and fibrin formation do not always go hand in hand and flow profoundly influences thrombus formation. We describe the technical/clinical evaluation of an assay to simultaneously measure thrombin generation and fibrin formation under conditions of flow. Introduction of a fluorometer into a 'cone and base principle'-based rheometer allowed the measurement of thrombin generation (using a thrombin-sensitive substrate) and fibrin formation (changes in viscosity), while applying a linear shear flow. Increasing shear rates inversely related with thrombin generation and fibrin formation. Increasing fibrinogen concentrations in defibrinated plasma resulted in increased thrombin generation and fibrin formation. In pre-operative samples of 70 patients undergoing cardiothoracic surgery, fibrin formation and thrombin generation parameters correlated with fibrinogen content, rotational thromboelastometry (ROTEM) and whole blood Calibrated Automated Thrombinography (CAT) parameters, respectively. Upon dividing patients into two groups based on the median clot strength, a significant difference in perioperative/total blood loss was established. In conclusion, we clinically evaluated a method capable of simultaneously measuring thrombin generation and fibrin formation in plasma/whole blood under continuous flow, rendering our method one step closer to physiology. Importantly, our test proved to be indicative for the amount of blood loss during/after cardiothoracic surgery.
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Affiliation(s)
- Hilde Kelchtermans
- Hilde Kelchtermans, Oxfordlaan 70, Maastricht 6229EV, The Netherlands, Tel.: +31 43 388 58 94, Fax: +31 43 388 45 70, E-mail:
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Brisse E, Imbrechts M, Put K, Avau A, Mitera T, Berghmans N, Rutgeerts O, Waer M, Ninivaggi M, Kelchtermans H, Boon L, Snoeck R, Wouters CH, Andrei G, Matthys P. Mouse Cytomegalovirus Infection in BALB/c Mice Resembles Virus-Associated Secondary Hemophagocytic Lymphohistiocytosis and Shows a Pathogenesis Distinct from Primary Hemophagocytic Lymphohistiocytosis. J Immunol 2016; 196:3124-34. [PMID: 26903481 DOI: 10.4049/jimmunol.1501035] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Accepted: 01/22/2016] [Indexed: 01/04/2023]
Abstract
Hemophagocytic lymphohistiocytosis (HLH) is a life-threatening immunological disorder that is characterized by systemic inflammation, widespread organ damage, and hypercytokinemia. Primary HLH is caused by mutations in granule-mediated cytotoxicity, whereas secondary HLH occurs, without a known genetic background, in a context of infections, malignancies, or autoimmune and autoinflammatory disorders. Clinical manifestations of both HLH subtypes are often precipitated by a viral infection, predominantly with Herpesviridae. Exploiting this knowledge, we established an animal model of virus-associated secondary HLH by infecting immunocompetent wild-type mice with the β-herpesvirus murine CMV. C57BL/6 mice developed a mild inflammatory phenotype, whereas BALB/c mice displayed the clinicopathologic features of HLH, as set forth in the Histiocyte Society diagnostic guidelines: fever, cytopenia, hemophagocytosis, hyperferritinemia, and elevated serum levels of soluble CD25. BALB/c mice also developed lymphadenopathy, liver dysfunction, and decreased NK cell numbers. Lymphoid and myeloid cells were in a hyperactivated state. Nonetheless, depletion of CD8(+) T cells could not inhibit or cure the HLH-like syndrome, highlighting a first dissimilarity from mouse models of primary HLH. Immune cell hyperactivation in BALB/c mice was accompanied by a cytokine storm. Notably, plasma levels of IFN-γ, a key pathogenic cytokine in models of primary HLH, were the highest. Nevertheless, murine CMV-infected IFN-γ-deficient mice still developed the aforementioned HLH-like symptoms. In fact, IFN-γ-deficient mice displayed a more complete spectrum of HLH, including splenomegaly, coagulopathy, and decreased NK cell cytotoxicity, indicating a regulatory role for IFN-γ in the pathogenesis of virus-associated secondary HLH as opposed to its central pathogenic role in primary HLH.
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Affiliation(s)
- Ellen Brisse
- Laboratory of Immunobiology, Rega Institute, University of Leuven, 3000 Leuven, Belgium
| | - Maya Imbrechts
- Laboratory of Immunobiology, Rega Institute, University of Leuven, 3000 Leuven, Belgium
| | - Karen Put
- Laboratory of Immunobiology, Rega Institute, University of Leuven, 3000 Leuven, Belgium
| | - Anneleen Avau
- Laboratory of Immunobiology, Rega Institute, University of Leuven, 3000 Leuven, Belgium
| | - Tania Mitera
- Laboratory of Immunobiology, Rega Institute, University of Leuven, 3000 Leuven, Belgium
| | - Nele Berghmans
- Laboratory of Molecular Immunology, Rega Institute, University of Leuven, 3000 Leuven, Belgium
| | - Omer Rutgeerts
- Laboratory of Experimental Transplantation, University of Leuven, 3000 Leuven, Belgium
| | - Mark Waer
- Laboratory of Experimental Transplantation, University of Leuven, 3000 Leuven, Belgium
| | - Marisa Ninivaggi
- Synapse BV, Cardiovascular Research Institute Maastricht School for Cardiovascular Diseases, Maastricht University, 6229 Maastricht, the Netherlands
| | - Hilde Kelchtermans
- Synapse BV, Cardiovascular Research Institute Maastricht School for Cardiovascular Diseases, Maastricht University, 6229 Maastricht, the Netherlands
| | - Louis Boon
- Epirus Biopharmaceuticals Netherlands, 3584 Utrecht, the Netherlands
| | - Robert Snoeck
- Laboratory of Virology and Chemotherapy, Rega Institute, University of Leuven, 3000 Leuven, Belgium; and
| | - Carine H Wouters
- Laboratory of Pediatric Immunology, University Hospital Gasthuisberg, University of Leuven, 3000 Leuven, Belgium
| | - Graciela Andrei
- Laboratory of Virology and Chemotherapy, Rega Institute, University of Leuven, 3000 Leuven, Belgium; and
| | - Patrick Matthys
- Laboratory of Immunobiology, Rega Institute, University of Leuven, 3000 Leuven, Belgium;
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Huskens D, Roest M, Remijn JA, Konings J, Kremers RMW, Bloemen S, Schurgers E, Selmeczi A, Kelchtermans H, van Meel R, Meex SJ, Kleinegris MC, de Groot PG, Urbanus RT, Ninivaggi M, de Laat B. Strenuous exercise induces a hyperreactive rebalanced haemostatic state that is more pronounced in men. Thromb Haemost 2016; 115:1109-19. [PMID: 26864794 DOI: 10.1160/th15-10-0821] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Accepted: 02/07/2016] [Indexed: 11/05/2022]
Abstract
Physical exercise is recommended for a healthy lifestyle. Strenuous exercise, however, may trigger the haemostatic system, increasing the risk of vascular thrombotic events and the incidence of primary cardiac arrest. Our goal was to study the effects of strenuous exercise on risk factors of cardiovascular disease. Blood was collected from 92 healthy volunteers who participated in the amateur version of the pro-tour Amstel Gold cycling race, before and directly after the race. Thrombin generation showed a shortening of the lag time and time to peak and an increase of the velocity index. Interestingly, the endogenous thrombin potential measured in plasma decreased due to reduced prothrombin conversion. Platelet reactivity increased and this effect was stronger in men than in women. Lower fibrinogen and higher D-dimer levels after exercise indicated higher fibrin formation. On the other hand, fibrinolysis was also elevated as indicated by a shortening of the clot lysis time. Exercise activated the endothelium (von Willebrand factor (VWF) and active VWF levels were elevated) and the immune system (concentrations IL-6, IL-8, MCP-1, RANTES and PDGF increased). Additionally, an increased cardiac troponin T level was measured post-exercise. Strenuous exercise induces a temporary hyperreactive state in the body with enhanced pro- and anticoagulant responses. As strenuous exercise has a more pronounced effect on platelet function in male subjects, this gives a possible explanation for the higher incidence of sudden cardiac death during exercise compared to women. This trial is registered at www.clinicaltrials.gov as NCT02048462.
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Affiliation(s)
- Dana Huskens
- Dana Huskens, Oxfordlaan 70, Maastricht 6229EV, The Netherlands, Tel.: +31 43 388 58 96, Fax: +31 43 388 45 70, E-mail:
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Ignjatovic V, Pelkmans L, Kelchtermans H, Al Dieri R, Hemker C, Kremers R, Bloemen S, Karlaftis V, Attard C, de Laat B, Monagle P. Differences in the mechanism of blood clot formation and nanostructure in infants and children compared with adults. Thromb Res 2015; 136:1303-9. [DOI: 10.1016/j.thromres.2015.10.034] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 10/22/2015] [Accepted: 10/23/2015] [Indexed: 11/24/2022]
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Zuily S, de Laat B, Mohamed S, Kelchtermans H, Shums Z, Albesa R, Norman GL, Lamboux-Matthieu C, Rat AC, Ninet J, Magy-Bertrand N, Pasquali JL, Lambert M, Lorcerie B, Kaminsky P, Guillemin F, Regnault V, Wahl D. Validity of the global anti-phospholipid syndrome score to predict thrombosis: a prospective multicentre cohort study. Rheumatology (Oxford) 2015; 54:2071-5. [PMID: 26163690 DOI: 10.1093/rheumatology/kev238] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE To investigate the validity of the global APS score (GAPSS) to predict thrombosis in patients with autoimmune diseases. METHODS This prospective cohort study included consecutive patients with aPL or SLE. aPL, aPS-PT and GAPSS were determined. A Cox proportional hazards model assessed the validity of GAPSS and identified other potential independent predictors of thrombosis. RESULTS One hundred and thirty-seven patients [43.5 (s.d. 15.4) years old; 107 women] were followed up for a mean duration of 43.1 (s.d. 20.7) months. Mean GAPSS was significantly higher in patients who experienced a thrombotic event compared with those without [10.88 (s.d. 5.06) vs 8.15 (s.d. 5.31), respectively, P = 0.038]. In univariate analysis, age [hazard ratio (HR) = 1.04 (95% CI 1.01, 1.08)] and GAPSS above 16 [HR = 6.86 (95% CI 1.90, 24.77)] were each significantly associated with thrombosis during follow-up, while history of arterial thrombosis [HR = 2.61 (95% CI 0.87, 7.82)] failed to reach significance. Among aPL assays, IgG aPS/PT--a component of the GAPSS--was significantly associated with thrombosis [HR = 2.95 (95% CI 1.02, 8.51)]. In multivariate analysis, GAPSS above 16 remained the only significant predictor of thrombosis [HR = 6.17 (95% CI 1.70, 22.40)]. CONCLUSION This first external validation study confirmed that GAPSS can predict thrombosis in patients with aPL and associated autoimmune diseases.
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Affiliation(s)
- Stéphane Zuily
- CHU de Nancy, Regional Competence Centre for Rare Vascular and Systemic Autoimmune Diseases, Vascular Medicine Division, Inserm, UMRS 1116, Nancy School of Medicine, Université de Lorraine, Nancy, France,
| | - Bas de Laat
- Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, Clinical Chemistry and Haematology, University Medical Centre Utrecht, Synapse BV, Maastricht, Department of Plasma Proteins/Blood coagulation, Sanquin Research, Amsterdam, The Netherlands
| | - Shirine Mohamed
- Nancy School of Medicine, Université de Lorraine, Nancy, France, CHU de Nancy, Orphan Disease Unit, Nancy, France
| | - Hilde Kelchtermans
- Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht
| | - Zakera Shums
- Research and Development, Inova Diagnostics, San Diego, CA, USA
| | - Roger Albesa
- Research and Development, Inova Diagnostics, San Diego, CA, USA
| | - Gary L Norman
- Research and Development, Inova Diagnostics, San Diego, CA, USA
| | - Claire Lamboux-Matthieu
- CHU de Nancy, Regional Competence Centre for Rare Vascular and Systemic Autoimmune Diseases, Vascular Medicine Division
| | - Anne-Christine Rat
- Université de Lorraine, Paris Descartes University, APEMAC, EA 4360, Inserm, CIC-EC 1433, CHU de Nancy, Clinical Epidemiology and Evaluation Department, CHU de Nancy, Rheumatology Department, Nancy
| | | | | | - Jean-Louis Pasquali
- CHU de Strasbourg, Internal Medicine and Clinical Immunology Department, Strasbourg, F-67000
| | - Marc Lambert
- CHRU de Lille, Department of Internal Medicine, Lille
| | - Bernard Lorcerie
- CHU de Dijon, Internal Medicine and Clinical Immunology Department, Dijon and
| | - Pierre Kaminsky
- Nancy School of Medicine, Université de Lorraine, Nancy, France, CHU de Nancy, Orphan Disease Unit, Nancy, France
| | - Francis Guillemin
- Université de Lorraine, Paris Descartes University, APEMAC, EA 4360, Inserm, CIC-EC 1433, CHU de Nancy, Clinical Epidemiology and Evaluation Department
| | | | - Denis Wahl
- CHU de Nancy, Regional Competence Centre for Rare Vascular and Systemic Autoimmune Diseases, Vascular Medicine Division, Inserm, UMRS 1116, Nancy School of Medicine, Université de Lorraine, Nancy, France
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Miszta A, Pelkmans L, Lindhout T, Krishnamoorthy G, de Groot PG, Hemker CH, Heemskerk JWM, Kelchtermans H, de Laat B. Thrombin-dependent Incorporation of von Willebrand Factor into a Fibrin Network. J Biol Chem 2014; 289:35979-86. [PMID: 25381443 DOI: 10.1074/jbc.m114.591677] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Attachment of platelets from the circulation onto a growing thrombus is a process involving multiple platelet receptors, endothelial matrix components, and coagulation factors. It has been indicated previously that during a transglutaminase reaction activated factor XIII (FXIIIa) covalently cross-links von Willebrand factor (VWF) to polymerizing fibrin. Bound VWF further recruits and activates platelets via interactions with the platelet receptor complex glycoprotein Ib (GPIb). In the present study we found proof for binding of VWF to a fibrin monomer layer during the process of fibrinogen-to-fibrin conversion in the presence of thrombin, arvin, or a snake venom from Crotalus atrox. Using a domain deletion mutant we demonstrated the involvement of the C domains of VWF in this binding. Substantial binding of VWF to fibrin monomers persisted in the presence of the FXIIIa inhibitor K9-DON, illustrating that cross-linking via factor XIII is not essential for this phenomenon and suggesting the identification of a second mechanism through which VWF multimers incorporate into a fibrin network. Under high shear conditions, platelets were shown to adhere to fibrin only if VWF had been incorporated. In conclusion, our experiments show that the C domains of VWF and the E domain of fibrin monomers are involved in the incorporation of VWF during the polymerization of fibrin and that this incorporation fosters binding and activation of platelets. Fibrin thus is not an inert end product but partakes in further thrombus growth. Our findings help to elucidate the mechanism of thrombus growth and platelet adhesion under conditions of arterial shear rate.
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Affiliation(s)
- Adam Miszta
- From the Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, 6229 EV, Maastricht, The Netherlands, Synapse BV, 6229 EV, Maastricht, The Netherlands,
| | - Leonie Pelkmans
- From the Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, 6229 EV, Maastricht, The Netherlands, Synapse BV, 6229 EV, Maastricht, The Netherlands
| | - Theo Lindhout
- From the Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, 6229 EV, Maastricht, The Netherlands, Synapse BV, 6229 EV, Maastricht, The Netherlands
| | - Ganeshram Krishnamoorthy
- From the Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, 6229 EV, Maastricht, The Netherlands
| | - Philip G de Groot
- Clinical Chemistry and Hematology, University Medical Center Utrecht, 3584 CX, Utrecht, The Netherlands
| | - Coenraad H Hemker
- From the Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, 6229 EV, Maastricht, The Netherlands, Synapse BV, 6229 EV, Maastricht, The Netherlands
| | - Johan W M Heemskerk
- From the Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, 6229 EV, Maastricht, The Netherlands
| | - Hilde Kelchtermans
- From the Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, 6229 EV, Maastricht, The Netherlands, Synapse BV, 6229 EV, Maastricht, The Netherlands
| | - Bas de Laat
- From the Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, 6229 EV, Maastricht, The Netherlands, Synapse BV, 6229 EV, Maastricht, The Netherlands
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Pelkmans L, Miszta A, Al Dieri R, de Laat B, Kelchtermans H. Thrombin generation in the presence of platelets is sensitive to the activation status of von Willebrand factor. Thromb Haemost 2014; 113:209-11. [PMID: 25274249 DOI: 10.1160/th14-03-0285] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Accepted: 08/28/2014] [Indexed: 11/05/2022]
Affiliation(s)
| | | | | | | | - Hilde Kelchtermans
- Dr. Hilde Kelchtermans, Oxfordlaan 70, Maastricht 6229EV, The Netherlands, Tel.: +31 433 884 570, Fax: +31 433 885 840, E-mail:
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Ninivaggi M, Kelchtermans H, Kuijpers MJ, Hemmeryckx B, Heemskerk JWM, Lindhout T, Hoylaerts MF, de Laat B. Whole blood thrombin generation in Bmal1-deficient mice. Thromb Haemost 2014; 112:271-5. [PMID: 24740693 DOI: 10.1160/th13-11-0910] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [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: 11/05/2013] [Accepted: 03/12/2014] [Indexed: 01/09/2023]
Abstract
The Calibrated Automated Thrombogram (CAT) assay that measures thrombin generation (TG) in platelet-poor and -rich plasma, is increasingly being recognised as a more sensitive tool to determine the overall function of the haemostatic system. We developed a method enabling the measurement of TG in a small aliquot of blood. The objective was to validate this assay in mouse blood and to examine the rate and extent of TG in a mouse model of premature aging. TG was assayed in blood from 20- to 28-week-old brain and muscle ARNT-like protein-1 (Bmal1)-deficient (knockout, KO) mice and wild-type (WT) littermates. Bmal1-KO mice are known to display symptoms of premature aging. TG was initiated by adding calcium, tissue factor and a thrombin specific substrate. After TG, the samples were prepared for scanning electron microscopy (SEM). The intra-assay variations (%) in mouse blood of the endogenous thrombin potential (ETP), peak height, lag time, time-to-peak and velocity index were 10% or less (n=24). We found that Bmal1-KO mice have a significantly (p<0.001) higher ETP (437 ± 7 nM.min; mean ± SD, n=7) when compared with WT mice (ETP=220 ± 45 nM.min; mean ± SD, n=5). The peak heights also differed significantly (p=0.027). By applying SEM we found that Bmal1 deficient mice display a denser fibrin network with smaller pores compared to WT mice. In conclusion, the whole blood TG assay in mice revealed to be reproducible. As a proof-of-principle we have shown that the whole blood TG assay is capable of detecting a prothrombotic phenotype in Bmal1-KO mice.
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Affiliation(s)
| | | | | | | | | | | | | | - B de Laat
- B. de Laat, PhD, Synapse bv, Oxfordlaan 70, 6229 EV Maastricht, The Netherlands, Tel.: +31 43 3885895, Fax: +31 43 3884159, E-mail:
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Du VX, Kelchtermans H, de Groot PG, de Laat B. From antibody to clinical phenotype, the black box of the antiphospholipid syndrome: Pathogenic mechanisms of the antiphospholipid syndrome. Thromb Res 2013; 132:319-26. [DOI: 10.1016/j.thromres.2013.07.023] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Revised: 07/26/2013] [Accepted: 07/26/2013] [Indexed: 11/30/2022]
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Pelkmans L, Kelchtermans H, de Groot PG, Zuily S, Regnault V, Wahl D, Pengo V, de Laat B. Variability in exposure of epitope G40-R43 of domain i in commercial anti-beta2-glycoprotein I IgG ELISAs. PLoS One 2013; 8:e71402. [PMID: 23951154 PMCID: PMC3741166 DOI: 10.1371/journal.pone.0071402] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Accepted: 06/27/2013] [Indexed: 01/22/2023] Open
Abstract
Background A major problem for diagnosing the antiphospholipid syndrome (APS) is the high variability between commercial anti-β2glycoprotein I (β2GPI) assays. Predominantly antibodies reactive against cryptic epitope Glycine40-Arginine43 (G40-R43) in domain I are associated with an increased risk for thrombosis. Upon interaction with anionic surfaces β2GPI opens up, thereby exposing G40-R43. Objectives To examine whether suboptimal exposure of epitope G40-R43 explains the variations in results observed between commercial assays. Methods Two patient-derived monoclonal antibodies were tested on neutral versus anionic plates. Antibody P1-117 reacts with G40-R43 in the open conformation while P2-6 recognizes β2GPI irrespective of its conformation. These antibodies were tested in commercial anti-β2GPI assays (A–E). Results In assay A, both antibodies showed equal reactivity towards β2GPI, indicating that all the β2GPI exposes G40-R43. In other assays P1-117 displayed lower reactivity than P2-6, demonstrating reduced G40-R43 availability. To exclude influences of other assay features, reactivity was re-examined on plates of assay A and B using the protocol/reagents from each assay. In all combinations, reactivity of both antibodies on a plate was comparable to results obtained with its own protocol/reagents, suggesting that the coating, rather than other assay components, accounts for the observed differences. In two patient cohorts we demonstrated that a number of domain I-reactive samples are missed in assays characterized by a decreased exposure of epitope G40-R43. Conclusions Exposure of epitope G40-R43 on β2GPI is highly variable between commercial anti-β2GPI assays. As a consequence, patients can be falsely assigned negative in assays characterized by a reduced exposure of G40-R43.
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Affiliation(s)
- Leonie Pelkmans
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, The Netherlands
- Synapse BV, Maastricht, The Netherlands
| | - Hilde Kelchtermans
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, The Netherlands
- Synapse BV, Maastricht, The Netherlands
- * E-mail:
| | - Philip G. de Groot
- Department of Clinical Chemistry and Haematology, University Medical Centre Utrecht, Utrecht, The Netherlands
| | - Stephane Zuily
- Vascular Medicine Division, Regional Competence Centre for Rare Vascular Diseases, CHU de Nancy, Nancy, France
- INSERM U1116, Université de Lorraine, Nancy, France
| | | | - Denis Wahl
- Vascular Medicine Division, Regional Competence Centre for Rare Vascular Diseases, CHU de Nancy, Nancy, France
- INSERM U1116, Université de Lorraine, Nancy, France
| | - Vittorio Pengo
- Clinical Cardiology, Department of Cardiothoracic and Vascular Sciences, Thrombosis Centre, University of Padua, Padua, Italy
| | - Bas de Laat
- Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, The Netherlands
- Synapse BV, Maastricht, The Netherlands
- Department of Clinical Chemistry and Haematology, University Medical Centre Utrecht, Utrecht, The Netherlands
- Sanquin Research, Amsterdam, The Netherlands
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Al Dieri R, Bloemen S, Kelchtermans H, Wagenvoord R, Hemker HC. A new regulatory function of activated factor V: inhibition of the activation by tissue factor/factor VII(a) of factor X. J Thromb Haemost 2013; 11:503-11. [PMID: 23294934 DOI: 10.1111/jth.12126] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [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: 08/03/2012] [Accepted: 01/02/2013] [Indexed: 11/27/2022]
Abstract
BACKGROUND We observed that minute amounts of thrombin or the enzyme Russell's viper venom activating factor V (RVV-V) added to plasma strongly diminish the potential of that plasma to generate thrombin after being triggered by tissue factor. OBJECTIVE To find the mechanism behind this phenomenon. METHODS AND RESULTS Thrombin generation (TG) initiated by tissue factor (TF) is strongly and dose-dependently inhibited by addition of activated factor V (FVa) or by addition of a factor V activator (thrombin or RVV-V). No inhibition is seen when TG is triggered via the intrinsic pathway or by direct activation of factor X. The effect is independent of proteins C and S and tissue factor pathway inhibitor (TFPI). In factor VII-deficient plasma the effect is seen when it is spiked with recombinant factor VII (FVII) and to a much lesser extent when spiked with recombinant FVIIa. In a purified system, FVa also dose-dependently inhibits the activation of FX by TF/FVII(a). The inhibitory effect is neutralized by antibodies against the light chain of FVa but not by antibodies against the heavy chain. CONCLUSIONS Our observations can be explained by assuming that FVa, via its light chain, binds to the complex TF/FVII(a) and prevents it from activating FX. We assume that this mechanism reduces the possibility that thrombin and factor Xa escaping from a wound area into the circulation, together with blood-borne tissue factor, would trigger intravascular coagulation.
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Affiliation(s)
- R Al Dieri
- Synapse BV, CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, the Netherlands.
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Frey O, Mitera T, Kelchtermans H, Schurgers E, Kamradt T, Matthys P. Ameliorated course of glucose-6-phosphate isomerase (G6PI)-induced arthritis in IFN-γ receptor knockout mice exposes an arthritis-promoting role of IFN-γ. J Autoimmun 2011; 36:161-9. [PMID: 21262564 DOI: 10.1016/j.jaut.2010.12.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [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: 09/20/2010] [Revised: 12/23/2010] [Accepted: 12/28/2010] [Indexed: 11/16/2022]
Abstract
The absence of IFN-γ signaling leads to an increased inflammatory response in many murine models of autoimmune diseases induced by a CFA-assisted immunization schedule. We investigated the role of endogenous IFN-γ in arthritis induced by immunization with glucose-6-phosphate isomerase (G6PI) in CFA in DBA/1 mice. Surprisingly, and in contrast to our previous findings in collagen-induced arthritis (CIA), G6PI-induced arthritis was found to be reduced in IFN-γ receptor-deficient (IFN-γR KO) mice, demonstrating a proinflammatory role for IFN-γ in this model. Milder disease in IFN-γR KO mice was associated with less vigorous innate and adaptive immune responses early (day 9) after immunization: less proliferation of myeloid cells in the spleen, less osteoclast formation, less G6PI-reactive Th cells (as measured by ex vivo stimulation and flow cytometry and by in vivo skin reactivity to G6PI) and lower G6PI-specific immunoglobulin serum levels. Surprisingly, on day 21, despite continued milder disease in IFN-γR KO mice, their Th cell responses were no longer diminished but augmented as compared to wild-type mice, and their numbers of immature myeloid splenocytes were also more increased. These data reveal that IFN-γ signaling is critical for the induction of the early immune responses which trigger G6PI-induced arthritis. The strikingly different clinical consequences of absent IFN-γ signaling in G6PI-induced arthritis compared with the very similarly induced CIA emphasize that the role of a single cytokine in experimentally induced arthritis depends critically on the very nature of the inciting (auto)antigen and in particular on the kinetics of the disease manifestation elicited by the antigen.
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MESH Headings
- Animals
- Arthritis, Experimental/genetics
- Arthritis, Experimental/immunology
- Arthritis, Experimental/pathology
- B-Lymphocytes/immunology
- B-Lymphocytes/metabolism
- Female
- Flow Cytometry
- Genetic Predisposition to Disease
- Glucose-6-Phosphate Isomerase/administration & dosage
- Glucose-6-Phosphate Isomerase/immunology
- Immunity, Cellular/immunology
- Immunity, Innate/immunology
- Immunization
- Interferon-gamma/immunology
- Lymphocyte Count
- Male
- Mice
- Mice, Inbred DBA
- Mice, Knockout
- Osteoclasts/immunology
- Osteoclasts/metabolism
- Receptors, Interferon/deficiency
- Receptors, Interferon/genetics
- Receptors, Interferon/immunology
- T-Lymphocytes/immunology
- T-Lymphocytes/metabolism
- Interferon gamma Receptor
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Affiliation(s)
- Oliver Frey
- Institute of Immunology, Jena University Hospital, Jena, Germany
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Frey O, Mitera T, Kelchtermans H, Schurgers E, Kamradt T, Matthys P. PS2-11Ameliorated course of glucose-6-phosphate isomerase (G6PI)-induced arthritis in IFN-γ receptor knockout mice exposes an arthritis-promoting role of IFN-γ. Cytokine 2010. [DOI: 10.1016/j.cyto.2010.07.216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Schurgers E, Kelchtermans H, Mitera T, Geboes L, Matthys P. Discrepancy between the in vitro and in vivo effects of murine mesenchymal stem cells on T-cell proliferation and collagen-induced arthritis. Arthritis Res Ther 2010; 12:R31. [PMID: 20175883 PMCID: PMC2875665 DOI: 10.1186/ar2939] [Citation(s) in RCA: 110] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2009] [Revised: 01/29/2010] [Accepted: 02/22/2010] [Indexed: 12/16/2022] Open
Abstract
INTRODUCTION The goal of this study is to analyze the potential immunosuppressive properties of mesenchymal stem cells (MSC) on T cell proliferation and in collagen-induced arthritis (CIA). An additional aim is to investigate the role of interferon-gamma (IFN-gamma) in these processes. METHODS MSC were isolated from bone marrow of DBA/1 wild type and IFN-gamma receptor knock-out (IFN-gammaR KO) mice and expanded in vitro. Proliferation of anti-CD3-stimulated CD4+ T cells in the presence or absence of MSC was evaluated by thymidine incorporation. CIA was induced in DBA/1 mice and animals were treated with MSC by intravenous or intraperitoneal injections of wild type or IFN-gammaR KO MSC. RESULTS Purity of enriched MSC cultures was evaluated by flow cytometry and their ability to differentiate into osteoblasts and adipocytes. In vitro, wild type MSC dose-dependently suppressed anti-CD3-induced T cell proliferation whereas IFN-gammaR KO MSC had a significantly lower inhibitory potential. A role for inducible nitric oxide (iNOS), programmed death ligand-1 (PD-L1) and prostaglandin E2 (PGE2), but not indoleamine 2,3-dioxigenase (IDO), in the T cell inhibition was demonstrated. In vivo, neither wild type nor IFN-gammaR KO MSC were able to reduce the severity of CIA or the humoral or cellular immune response toward collagen type II. CONCLUSIONS Whereas MSC inhibit anti-CD3-induced proliferation of T cells in vitro, an effect partially mediated by IFN-gamma, MSC do not influence in vivo T cell proliferation nor the disease course of CIA. Thus there is a clear discrepancy between the in vitro and in vivo effects of MSC on T cell proliferation and CIA.
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Affiliation(s)
- Evelien Schurgers
- Laboratory of Immunobiology, Rega Institute, Faculty of Medicine, Katholieke Universiteit Leuven, Minderbroedersstraat 10, 3000 Leuven, Belgium
| | - Hilde Kelchtermans
- Laboratory of Immunobiology, Rega Institute, Faculty of Medicine, Katholieke Universiteit Leuven, Minderbroedersstraat 10, 3000 Leuven, Belgium
| | - Tania Mitera
- Laboratory of Immunobiology, Rega Institute, Faculty of Medicine, Katholieke Universiteit Leuven, Minderbroedersstraat 10, 3000 Leuven, Belgium
| | - Lies Geboes
- Laboratory of Immunobiology, Rega Institute, Faculty of Medicine, Katholieke Universiteit Leuven, Minderbroedersstraat 10, 3000 Leuven, Belgium
| | - Patrick Matthys
- Laboratory of Immunobiology, Rega Institute, Faculty of Medicine, Katholieke Universiteit Leuven, Minderbroedersstraat 10, 3000 Leuven, Belgium
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Kelchtermans H, Schurgers E, Geboes L, Mitera T, Van Damme J, Van Snick J, Uyttenhove C, Matthys P. Effector mechanisms of interleukin-17 in collagen-induced arthritis in the absence of interferon-gamma and counteraction by interferon-gamma. Arthritis Res Ther 2009; 11:R122. [PMID: 19686583 PMCID: PMC2745806 DOI: 10.1186/ar2787] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2009] [Revised: 07/29/2009] [Accepted: 08/17/2009] [Indexed: 12/11/2022] Open
Abstract
INTRODUCTION Interleukin (IL)-17 is a pro-inflammatory cytokine in rheumatoid arthritis (RA) and collagen-induced arthritis (CIA). Since interferon (IFN)-gamma inhibits Th17 cell development, IFN-gamma receptor knockout (IFN-gammaR KO) mice develop CIA more readily. We took advantage of this model to analyse the mechanisms of action of IL-17 in arthritis. The role of IFN-gamma on the effector mechanisms of IL-17 in an in vitro system was also investigated. METHODS IFN-gammaR KO mice induced for CIA were treated with anti-IL-17 or control antibody. The collagen type II (CII)-specific humoral and cellular autoimmune responses, myelopoiesis, osteoclastogenesis, and systemic cytokine production were determined. Mouse embryo fibroblasts (MEF) were stimulated with IL-17, tumor necrosis factor (TNF)-alpha and the expression of cytokines and chemokines were determined. RESULTS A preventive anti-IL-17 antibody treatment inhibited CIA in IFNgammaR KO mice. In the joints of anti-IL-17-treated mice, neutrophil influx and bone destruction were absent. Treatment reduced the cellular autoimmune response as well as the splenic expansion of CD11b+ cells, and production of myelopoietic cytokines such as granulocyte macrophage colony-stimulating factor (GM-CSF) and IL-6. IL-17 and TNF-alpha synergistically induced granulocyte chemotactic protein-2 (GCP-2), IL-6 and receptor activator of NFkappaB ligand (RANKL) in MEF. This induction was profoundly inhibited by IFN-gamma in a STAT-1 (signal transducer and activator of transcription-1)-dependent way. CONCLUSIONS In the absence of IFN-gamma, IL-17 mediates its pro-inflammatory effects mainly through stimulatory effects on granulopoiesis, neutrophil infiltration and bone destruction. In vitro IFN-gamma profoundly inhibits the effector function of IL-17. Thus, aside from the well-known inhibition of the development of Th17 cells by IFN-gamma, this may be an additional mechanism through which IFN-gamma attenuates autoimmune diseases.
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Affiliation(s)
- Hilde Kelchtermans
- Laboratories of Immunobiology, Rega Institute, Faculty of Medicine, Katholieke Universiteit Leuven, Minderbroedersstraat 10, B-3000 Leuven, Belgium
| | - Evelien Schurgers
- Laboratories of Immunobiology, Rega Institute, Faculty of Medicine, Katholieke Universiteit Leuven, Minderbroedersstraat 10, B-3000 Leuven, Belgium
| | - Lies Geboes
- Laboratories of Immunobiology, Rega Institute, Faculty of Medicine, Katholieke Universiteit Leuven, Minderbroedersstraat 10, B-3000 Leuven, Belgium
| | - Tania Mitera
- Laboratories of Immunobiology, Rega Institute, Faculty of Medicine, Katholieke Universiteit Leuven, Minderbroedersstraat 10, B-3000 Leuven, Belgium
| | - Jo Van Damme
- Molecular Immunology, Rega Institute, Faculty of Medicine, Katholieke Universiteit Leuven, Minderbroedersstraat 10, B-3000 Leuven, Belgium
| | - Jacques Van Snick
- Ludwig Institute for Cancer Research, Brussels Branch, Cellular Genetics and Experimental Units, Christian de Duve Institute of Cellular Pathology, Université Catholique de Louvain, Avenue Hippocrate 75, B-1200 Brussels, Belgium
| | - Catherine Uyttenhove
- Ludwig Institute for Cancer Research, Brussels Branch, Cellular Genetics and Experimental Units, Christian de Duve Institute of Cellular Pathology, Université Catholique de Louvain, Avenue Hippocrate 75, B-1200 Brussels, Belgium
| | - Patrick Matthys
- Laboratories of Immunobiology, Rega Institute, Faculty of Medicine, Katholieke Universiteit Leuven, Minderbroedersstraat 10, B-3000 Leuven, Belgium
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Geboes L, Dumoutier L, Kelchtermans H, Schurgers E, Mitera T, Renauld JC, Matthys P. Proinflammatory role of the Th17 cytokine interleukin-22 in collagen-induced arthritis in C57BL/6 mice. Arthritis Rheum 2009; 60:390-5. [PMID: 19180498 DOI: 10.1002/art.24220] [Citation(s) in RCA: 196] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
OBJECTIVE To investigate the role of interleukin-22 (IL-22) in collagen-induced arthritis (CIA), an animal model of rheumatoid arthritis. METHODS C57BL/6 mice were immunized with type II collagen (CII) in Freund's incomplete adjuvant with added Mycobacterium tuberculosis, and levels of IL-22 and its specific receptor, IL-22 receptor type I (IL-22RI), were measured in sera and tissue by enzyme-linked immunosorbent assay and real-time quantitative polymerase chain reaction analysis. Clinical and histologic signs of arthritis were recorded and compared with those in C57BL/6 mice deficient in the IL-22 gene (IL-22(-/-)). Humoral and cellular immune responses against CII were analyzed. In vitro osteoclastogenesis assays were performed on splenocytes. RESULTS Upon immunization with CII in Freund's incomplete adjuvant plus heat-killed Mycobacterium tuberculosis, sera from C57BL/6 mice were found to contain high levels of IL-22, and the specific IL-22RI was expressed in lymphoid tissue, including splenocytes. IL-22(-/-) mice were less susceptible to CIA than were wild-type mice, as evidenced by their decreased incidence of arthritis and decreased pannus formation. Remarkably, the less severe form of arthritis in IL-22(-/-) mice was associated with increased production of CII-specific and total IgG antibodies, whereas cellular CII responses were unchanged. In vitro, IL-22 was found to promote osteoclastogenesis, a process that might contribute to its proinflammatory activity in CIA. CONCLUSION Endogenous IL-22 plays a proinflammatory role in CIA in C57BL/6 mice. Our data also indicate that IL-22 promotes osteoclastogenesis and regulates antibody production.
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Affiliation(s)
- Lies Geboes
- Katholieke Universiteit Leuven, Leuven, Belgium.
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Kelchtermans H, Billiau A, Matthys P. How interferon-γ keeps autoimmune diseases in check. Trends Immunol 2008; 29:479-86. [DOI: 10.1016/j.it.2008.07.002] [Citation(s) in RCA: 134] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2008] [Revised: 06/27/2008] [Accepted: 07/03/2008] [Indexed: 11/15/2022]
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Kelchtermans H, Geboes L, Mitera T, Huskens D, Leclercq G, Matthys P. Activated CD4+CD25+ regulatory T cells inhibit osteoclastogenesis and collagen-induced arthritis. Ann Rheum Dis 2008; 68:744-50. [DOI: 10.1136/ard.2007.086066] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Objectives:Patients with rheumatoid arthritis (RA) have defective CD4+CD25+ regulatory T (Treg) cells and increased osteoclastogenesis. A similar situation has been described in collagen-induced arthritis (CIA). In this study, it was investigated whether a single transfer of polyclonally activated Treg cells inhibits CIA and osteoclastogenesis.Methods:Purified Treg cells were expanded in vitro with anti-CD3 and anti-CD28 antibody-coated beads and injected into DBA/1 mice. Mice were immunised with collagen type II (CII) in complete Freund adjuvant (CFA) and scores of arthritis were recorded. In vitro osteoclastogenesis assays were performed on splenocytes by stimulation with macrophage colony-stimulating factor (M-CSF) and receptor activator of nuclear factor (NF)κB ligand (RANKL). Levels of anti-CII antibody and cytokines were determined in the supernatant using ELISA and Bio-Plex protein array system.Results:It was found that 106 activated Treg cells significantly counteracted the development of CIA, which was accompanied by decreased serum levels of TNFα and IL6, but not by inhibition of autoimmune antibody responses. The differentiation of osteoclasts in splenocyte cultures was significantly reduced in the presence of prestimulated Treg cells. Expression of cytokines that are described to inhibit osteoclastogenesis, including granulocyte macrophage colony-stimulating factor (GM-CSF), interferon (IFN)γ, interleukin (IL)5 and IL10, were dramatically increased upon addition of Treg cells. Furthermore, splenocytes from mice that had been treated with Treg cells displayed an impaired capacity to develop into mature osteoclasts, suggesting that Treg cells abrogated osteoclastogenesis in vivo.Conclusions:Activated CD4+CD25+ Treg cells improve clinical symptoms of CIA, regulate cytokine production and inhibit osteoclastogenesis in vitro and in vivo.
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Geboes L, De Klerck B, Van Balen M, Kelchtermans H, Mitera T, Boon L, De Wolf-Peeters C, Matthys P. Freund's complete adjuvant induces arthritis in mice lacking a functional interferon-gamma receptor by triggering tumor necrosis factor alpha-driven osteoclastogenesis. Arthritis Rheum 2007; 56:2595-607. [PMID: 17665444 DOI: 10.1002/art.22791] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To investigate the hypothesis that Freund's complete adjuvant (CFA) plays an essential role in the induction of collagen-induced arthritis in mice, by testing whether CFA by itself is able to induce arthritis in interferon-gamma receptor-knockout (IFNgammaR-KO) mice. METHODS IFNgammaR-KO and wild-type mice were sensitized with a single intradermal injection of CFA containing heat-killed Mycobacterium butyricum. Flow cytometric analysis and in vitro osteoclastogenesis assays were performed on blood, spleen, and bone marrow cells. Tumor necrosis factor (TNF) levels were measured in the serum, and levels of RANKL, osteoprotegerin (OPG), and TNFalpha in the synovium were determined by quantitative reverse transcriptase-polymerase chain reaction. Effects of treatment with the TNFalpha antagonist etanercept were assessed. RESULTS Symptoms of arthritis appeared in IFNgammaR-KO mice but not in wild-type mice, and reached an incidence of 55%. The onset coincided with an expansion of CD11b+ splenocytes that spontaneously produced TNFalpha and with increased osteoclastogenesis in spleen and blood cells. Expansion of CD11b+ splenocytes and osteoclast precursor cells was more pronounced in arthritic than in nonarthritic mice. There was a >100-fold increase in the RANKL:OPG ratio in the synovia of CFA-sensitized mice compared with those of naive animals. Treatment with etanercept prevented the development of arthritis and mitigated the increased expansion of myeloid cells as well as the increase in osteoclast precursor numbers in the spleen and blood. CONCLUSION These results indicate that sensitization of mice with CFA creates a condition in which dysregulation of a single cytokine leads to arthritis by triggering TNFalpha-driven osteoclastogenesis.
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Affiliation(s)
- Lies Geboes
- Katholieke Universiteit Leuven, Leuven, Belgium
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Kelchtermans H, Struyf S, De Klerck B, Mitera T, Alen M, Geboes L, Van Balen M, Dillen C, Put W, Gysemans C, Billiau A, Van Damme J, Matthys P. Protective role of IFN-gamma in collagen-induced arthritis conferred by inhibition of mycobacteria-induced granulocyte chemotactic protein-2 production. J Leukoc Biol 2007; 81:1044-53. [PMID: 17200147 DOI: 10.1189/jlb.0806486] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Mice with a disrupted IFN-gamma system are remarkably susceptible to experimental autoimmune diseases, such as collagen-induced arthritis (CIA), which rely on the use of CFA. The inflammatory lesions of these IFN-gamma knockout (KO) mice are characterized by an excessive proportion of neutrophils. Here, we show that the increased severity of CIA in IFN-gammaR KO as compared with wild-type mice is accompanied by increased levels of the CXC chemokine granulocyte chemotactic protein-2 (GCP-2), a major neutrophil-attracting chemokine in mice. We demonstrated that the heat-killed mycobacteria present in CFA elicited production of GCP-2 in mouse embryo fibroblast cultures and that this production was inhibited by IFN-gamma. Inhibition of GCP-2 production by IFN-gamma was STAT-1-dependent. IFN-gamma receptor KO mice treated with neutralizing anti-GCP-2 antibodies were protected from CIA, indicating the in vivo importance of GCP-2 in the pathogenesis of CIA. Our data support the notion that one of the mechanisms whereby endogenous IFN-gamma mitigates the manifestations of CIA consists of inhibiting production of GCP-2, thereby limiting mobilization and infiltration of neutrophils, which are important actors in joint inflammation. These results may also be applicable to other experimental models of autoimmunity that rely on the use of CFA.
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Affiliation(s)
- Hilde Kelchtermans
- Laboratory of Immunobiology, Rega Institute for Medical Research, University of Leuven, Minderbroederstraat 10, B-3000 Leuven, Belgium.
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De Klerck B, Geboes L, Hatse S, Kelchtermans H, Meyvis Y, Vermeire K, Bridger G, Billiau A, Schols D, Matthys P. Pro-inflammatory properties of stromal cell-derived factor-1 (CXCL12) in collagen-induced arthritis. Arthritis Res Ther 2005; 7:R1208-20. [PMID: 16277673 PMCID: PMC1297565 DOI: 10.1186/ar1806] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.3] [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] [Received: 03/25/2005] [Revised: 07/14/2005] [Accepted: 07/29/2005] [Indexed: 11/17/2022] Open
Abstract
CXCL12 (stromal cell-derived factor 1) is a unique biological ligand for the chemokine receptor CXCR4. We previously reported that treatment with a specific CXCR4 antagonist, AMD3100, exerts a beneficial effect on the development of collagen-induced arthritis (CIA) in the highly susceptible IFN-γ receptor-deficient (IFN-γR KO) mouse. We concluded that CXCL12 plays a central role in the pathogenesis of CIA in IFN-γR KO mice by promoting delayed type hypersensitivity against the auto-antigen and by interfering with chemotaxis of CXCR4+ cells to the inflamed joints. Here, we investigated whether AMD3100 can likewise inhibit CIA in wild-type mice and analysed the underlying mechanism. Parenteral treatment with the drug at the time of onset of arthritis reduced disease incidence and modestly inhibited severity in affected mice. This beneficial effect was associated with reduced serum concentrations of IL-6. AMD3100 did not affect anti-collagen type II antibodies and, in contrast with its action in IFN-γR KO mice, did not inhibit the delayed type hypersensitivity response against collagen type II, suggesting that the beneficial effect cannot be explained by inhibition of humoral or cellular autoimmune responses. AMD3100 inhibited the in vitro chemotactic effect of CXCL12 on splenocytes, as well as in vivo leukocyte infiltration in CXCL12-containing subcutaneous air pouches. We also demonstrate that, in addition to its effect on cell infiltration, CXCL12 potentiates receptor activator of NF-κB ligand-induced osteoclast differentiation from splenocytes and increases the calcium phosphate-resorbing capacity of these osteoclasts, both processes being potently counteracted by AMD3100. Our observations indicate that CXCL12 acts as a pro-inflammatory factor in the pathogenesis of autoimmune arthritis by attracting inflammatory cells to joints and by stimulating the differentiation and activation of osteoclasts.
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MESH Headings
- Animals
- Antibody Formation/drug effects
- Arthritis, Experimental/drug therapy
- Arthritis, Experimental/metabolism
- Arthritis, Experimental/pathology
- Benzylamines
- Cell Movement/drug effects
- Chemokine CXCL12
- Chemokines, CXC/antagonists & inhibitors
- Chemokines, CXC/metabolism
- Chemotaxis/drug effects
- Chickens
- Collagen Type II/immunology
- Cyclams
- Disease Models, Animal
- Heterocyclic Compounds/therapeutic use
- Immunity, Cellular/drug effects
- Interleukin-6/blood
- Joints/drug effects
- Joints/metabolism
- Joints/pathology
- Male
- Mice
- Mice, Inbred DBA
- Receptors, CXCR4/antagonists & inhibitors
- Receptors, CXCR4/metabolism
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Affiliation(s)
- Bert De Klerck
- Laboratory of Immunobiology, Rega Institute, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Lies Geboes
- Laboratory of Immunobiology, Rega Institute, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Sigrid Hatse
- Laboratory of Virology and Chemotherapy, Rega Institute, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Hilde Kelchtermans
- Laboratory of Immunobiology, Rega Institute, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Yves Meyvis
- Laboratory of Immunobiology, Rega Institute, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Kurt Vermeire
- Laboratory of Virology and Chemotherapy, Rega Institute, Katholieke Universiteit Leuven, Leuven, Belgium
| | | | - Alfons Billiau
- Laboratory of Immunobiology, Rega Institute, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Dominique Schols
- Laboratory of Virology and Chemotherapy, Rega Institute, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Patrick Matthys
- Laboratory of Immunobiology, Rega Institute, Katholieke Universiteit Leuven, Leuven, Belgium
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Kelchtermans H, De Klerck B, Mitera T, Van Balen M, Bullens D, Billiau A, Leclercq G, Matthys P. Defective CD4+CD25+ regulatory T cell functioning in collagen-induced arthritis: an important factor in pathogenesis, counter-regulated by endogenous IFN-gamma. Arthritis Res Ther 2005; 7:R402-15. [PMID: 15743488 PMCID: PMC1065335 DOI: 10.1186/ar1500] [Citation(s) in RCA: 128] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2004] [Revised: 11/19/2004] [Accepted: 12/20/2004] [Indexed: 02/07/2023] Open
Abstract
Mice with a deficiency in IFN-gamma or IFN-gamma receptor (IFN-gammaR) are more susceptible to collagen-induced arthritis (CIA), an experimental autoimmune disease that relies on the use of complete Freund's adjuvant (CFA). Here we report that the heightened susceptibility of IFN-gammaR knock-out (KO) mice is associated with a functional impairment of CD4+CD25+ Treg cells. Treatment of wild-type mice with depleting anti-CD25 antibody after CFA-assisted immunisation with collagen type II (CII) significantly accelerated the onset of arthritis and increased the severity of CIA. This is an indication of a role of Treg cells in the effector phase of CIA. IFN-gammaR deficiency did not affect the number of CD4+CD25+ T cells in the central and peripheral lymphoid tissues. In addition, CD4+CD25+ T cells isolated from naive IFN-gammaR KO mice had a normal potential to suppress T cell proliferation in vitro. However, after immunisation with CII in CFA, the suppressive activity of CD4+CD25+ T cells became significantly more impaired in IFN-gammaR-deficient mice. Moreover, expression of the mRNA for Foxp3, a highly specific marker for Treg cells, was lower. We further demonstrated that the effect of endogenous IFN-gamma, which accounts for more suppressive activity in wild-type mice, concerns both Treg cells and accessory cells. Our results demonstrate that the decrease in Treg cell activity in CIA is counter-regulated by endogenous IFN-gamma.
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MESH Headings
- Animals
- Antibodies, Monoclonal/immunology
- Antigen-Presenting Cells/immunology
- Arthritis, Experimental/etiology
- Arthritis, Experimental/immunology
- Arthritis, Experimental/pathology
- CD4-Positive T-Lymphocytes/immunology
- Coculture Techniques
- Collagen Type II/immunology
- Female
- Freund's Adjuvant/toxicity
- Immunization
- Immunophenotyping
- Interferon-gamma/physiology
- Lymphocyte Activation/drug effects
- Lymphocyte Depletion
- Male
- Mice
- Mice, Inbred DBA
- Mice, Knockout
- Receptors, Interferon/deficiency
- Receptors, Interferon/genetics
- Receptors, Interleukin-2/analysis
- Receptors, Interleukin-2/immunology
- Reverse Transcriptase Polymerase Chain Reaction
- T-Lymphocytes, Regulatory/immunology
- Transforming Growth Factor beta/physiology
- Interferon gamma Receptor
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Affiliation(s)
- Hilde Kelchtermans
- Laboratory of Immunobiology, Rega Institute for Medical Research, Katholieke Universiteit Leuven (KULeuven), Leuven, Belgium
| | - Bert De Klerck
- Laboratory of Immunobiology, Rega Institute for Medical Research, Katholieke Universiteit Leuven (KULeuven), Leuven, Belgium
| | - Tania Mitera
- Laboratory of Immunobiology, Rega Institute for Medical Research, Katholieke Universiteit Leuven (KULeuven), Leuven, Belgium
| | - Maarten Van Balen
- Laboratory of Immunobiology, Rega Institute for Medical Research, Katholieke Universiteit Leuven (KULeuven), Leuven, Belgium
| | - Dominique Bullens
- Laboratory for Experimental Immunology, Department of Pathophysiology, Faculty of Medicine, Katholieke Universiteit Leuven (KULeuven), Leuven, Belgium
| | - Alfons Billiau
- Laboratory of Immunobiology, Rega Institute for Medical Research, Katholieke Universiteit Leuven (KULeuven), Leuven, Belgium
| | - Georges Leclercq
- Department of Clinical Chemistry, Microbiology and Immunology, Ghent University Hospital, Ghent, Belgium
| | - Patrick Matthys
- Laboratory of Immunobiology, Rega Institute for Medical Research, Katholieke Universiteit Leuven (KULeuven), Leuven, Belgium
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