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Devreese KMJ. Noncriteria antiphospholipid antibodies in antiphospholipid syndrome. Int J Lab Hematol 2024; 46 Suppl 1:34-42. [PMID: 38584293 DOI: 10.1111/ijlh.14268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Accepted: 02/28/2024] [Indexed: 04/09/2024]
Abstract
Antiphospholipid syndrome (APS) is an autoimmune disease characterized by thrombotic manifestations and/or obstetric complications in patients with persistently positive antiphospholipid antibodies (aPL). aPL are a heterogeneous group of autoantibodies, but only lupus anticoagulant, anticardiolipin (aCL), and antibeta2-glycoprotein I antibodies (aβ2GPI) IgG or IgM are included as laboratory classification criteria. Seronegative APS patients are usually defined as patients with the clinical symptoms of APS but who test negative for aPL. The negativity to classic aPL criteria does not exclude the presence of other aPL. Several noncriteria aPL have been identified. Some noncriteria aPL are well studied, such as IgA aCL and aβ2GPI, the antiphosphatidylserine-prothrombin (aPS/PT) antibodies, and the antibodies against the domain I of beta2-glycoprotein I (aDI), both latter groups receiving more attention for their role in thrombotic events and pregnancy complications. Other noncriteria aPL that have been studied are antibodies against annexin V, prothrombin, phosphatidylethanolamine, phosphatidic acid, phosphatidylserine, phosphatidylinositol, vimentin-cardiolipin complex, anti-protein S/protein C. Measurement of some of these noncriteria aPL (aPS/PT, aDI) is useful in the laboratory work-out of APS in specific situations. We have to differentiate between patients who are positive for noncriteria aPL only, and patients who have both criteria and noncriteria aPL to enable us to study their role in the diagnosis or risk stratification of APS. The research on noncriteria aPL is continually developing as the clinical relevance of these antibodies is not yet fully clarified.
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Affiliation(s)
- Katrien M J Devreese
- Coagulation Laboratory, Ghent University Hospital, Department of Diagnostic Sciences, Ghent University, Ghent, Belgium
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2
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de Laat B, Gehlen R, de Groot PG. Viewpoint: The value of non-criteria antiphospholipid antibodies. Rheumatology (Oxford) 2024; 63:SI64-SI71. [PMID: 38320588 DOI: 10.1093/rheumatology/kead632] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 09/29/2023] [Indexed: 02/08/2024] Open
Abstract
In 2006, at a meeting in Sydney, Australia, consensus was reached by an international group of specialists to establish a number of serological criteria that identify patients with a history of thrombosis or pregnancy complications as having antiphospholipid syndrome (APS). These criteria were originally formulated for research purposes and to compare clinical trials in different centres. However, these same criteria are now generally used and accepted for the diagnosis and treatment of patients. The practice of using these criteria for direct patient care requires that these criteria are based on sound scientific evidence. Indeed, for all the autoantibodies that are officially included in the serological criteria, it has been shown that they induce thrombosis and fetal loss when infused into mice. There are also a number of additional autoantibodies that have been identified in these patients but for these antibodies there was not enough evidence to meet the official APS criteria in 2006. Seventeen years have now passed since the consensus meeting, therefore, this review examines whether additional studies performed with these 'non-criteria' autoantibodies have provided sufficient results to suggest the inclusion of these autoantibodies in the official serological criteria of APS.
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Affiliation(s)
- Bas de Laat
- Synapse Research Institute, Maastricht, The Netherlands
| | - Rachel Gehlen
- Synapse Research Institute, Maastricht, The Netherlands
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3
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Atsumi T, Chighizola CB, Fujieda Y, Mackie I, Radin M, Roubey R, Bertolaccini ML. 16th International congress on antiphospholipid antibodies task force report on antiphospholipid syndrome laboratory diagnostics and trends. Lupus 2023; 32:1625-1636. [PMID: 37933818 PMCID: PMC10666497 DOI: 10.1177/09612033231211820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
Classification criteria for antiphospholipid syndrome (APS) require IgG or IgM isotypes of the anticardiolipin (aCL) antibodies, anti-β2 glycoprotein I (anti-β2GPI) antibodies, and/or the lupus anticoagulant (LA) to satisfy the laboratory disease definition. Over the past 20 years, non-criteria antiphospholipid antibodies (aPL) directed to other proteins of the coagulation cascade (i.e. prothrombin and/or phosphatidylserine-prothrombin complex) or to some domains of β2GPI have been proposed. This task force concentrated and reviewed the literature on data including aPS/PT, antibodies to domain 4/5 of β2GPI and the newly described antibodies to protein/HLA-DR complex. In addition, we discussed testing of LA in the 'new' oral anticoagulants' era and the value of triple positivity in the risk assessment of aPL. The conclusions were presented at a special session during the 16th International Congress on aPL, Manchester, UK, September 2019.
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Affiliation(s)
- Tatsuya Atsumi
- Department of Rheumatology, Endocrinology and Nephrology, Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - Cecilia B Chighizola
- Unit of Pediatric Rheumatology, ASST G. Pini - CTO, Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
| | - Yuichiro Fujieda
- Department of Rheumatology, Endocrinology and Nephrology, Faculty of Medicine, Hokkaido University, Sapporo, Japan
| | - Ian Mackie
- Department of Haematology, Haemostasis Research Unit, University College London, London, UK
| | - Massimo Radin
- Department of Clinical and Biological Sciences, and SCDU Nephrology and Dialysis, S. Giovanni Bosco Hospital, Center of Research of Immunopathology and Rare Diseases - Coordinating Center of Piemonte and Valle d'Aosta Network for Rare Diseases, Turin, Italy
| | - Robert Roubey
- Division of Rheumatology, Allergy & Immunology, Thurston Arthritis Research Center, University of North Carolina, Chapel Hill, NC, USA
| | - Maria Laura Bertolaccini
- Academic Department of Vascular Surgery, School of Cardiovascular and Metabolic Medicine & Sciences, King's College London, London, UK
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Meroni PL, Borghi MO. Antiphospholipid Antibody Assays in 2021: Looking for a Predictive Value in Addition to a Diagnostic One. Front Immunol 2021; 12:726820. [PMID: 34621272 PMCID: PMC8490700 DOI: 10.3389/fimmu.2021.726820] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 09/01/2021] [Indexed: 12/22/2022] Open
Abstract
Antiphospholipid antibodies (aPL) are mandatory for the diagnosis but are also a risk factor for the antiphospholipid syndrome (APS) clinical manifestations. Lupus anticoagulant (LA), anticardiolipin (aCL), and anti-beta2 glycoprotein I (β2GPI) assays are the formal laboratory classification/diagnostic criteria. Additional nonclassification assays have been suggested; among them, antiphosphatidylserine-prothrombin (aPS/PT) and antidomain 1 β2GPI antibodies are the most promising ones although not yet formally accepted. aPL represent the example of a laboratory test that moved from dichotomous to quantitative results consistent with the idea that reporting quantitative data offers more diagnostic/prognostic information for both vascular and obstetric manifestations. Although the general rule is that the higher the aPL titer, the higher the test likelihood ratio, there is growing evidence that this is not the case for persistent low titers and obstetric events. LA displays the highest diagnostic/prognostic power, although some isolated LAs are apparently not associated with APS manifestations. Moreover, isotype characterization is also critical since IgG aPL are more diagnostic/prognostic than IgA or IgM. aPL are directed against two main autoantigens: β2GPI and PT. However, anti-β2GPI antibodies are more associated with the APS clinical spectrum. In addition, there is evidence that anti-β2GPI domain 1 antibodies display a stronger diagnostic/prognostic value. This finding supports the view that antigen and even epitope characterization represents a further step for improving the assay value. The strategy to improve aPL laboratory characterization is a lesson that can be translated to other autoantibody assays in order to improve our diagnostic and prognostic power.
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Affiliation(s)
- Pier Luigi Meroni
- Istituto Auxologico Italiano, IRCCS, Immunorheumatology Research Laboratory, Milan, Italy
| | - Maria Orietta Borghi
- Istituto Auxologico Italiano, IRCCS, Immunorheumatology Research Laboratory, Milan, Italy.,Department of Clinical Science and Community Health, University of Milan, Milan, Italy
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de Jesús GR, Benson AE, Chighizola CB, Sciascia S, Branch DW. 16th International Congress on Antiphospholipid Antibodies Task Force Report on Obstetric Antiphospholipid Syndrome. Lupus 2020; 29:1601-1615. [PMID: 32883160 DOI: 10.1177/0961203320954520] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Obstetric antiphospholipid syndrome (APS) remains a clinical challenge for practitioners, with several controversial points that have not been answered so far. This Obstetric APS Task Force met on the 16th International Congress on Antiphospholipid Antibodies in Manchester, England, to discuss about treatment, diagnostic and clinical aspects of the disease. This report will address evidence-based medicine related to obstetric APS, including limitations on our current management, the relationship between antibodies against domain 1 of β2GPI and obstetric morbidity, hydroxychloroquine use in patients with obstetric APS and factors associated with thrombosis after obstetric APS. Finally, future directions for better understanding this complex condition are also reported by the Task Force coordinators.
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Affiliation(s)
- Guilherme R de Jesús
- Department of Obstetrics, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Ashley E Benson
- Obstetrics and Gynecology, University of Utah Health, Salt Lake City, UT, USA
| | - Cecilia B Chighizola
- Experimental Laboratory of Immunorheumatological Researches, Allergology, Clinical Immunology & Rheumatology Unit, Istituto Auxologico Italiano IRCCS, Milan, Italy
| | - Savino Sciascia
- Center of Research of Immunopathology and Rare Diseases, Department of Clinical and Biological Sciences, University of Turin, Turin, Italy
| | - David W Branch
- Obstetrics and Gynecology, University of Utah Health, Salt Lake City, UT, USA
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Sciascia S, Radin M, Cecchi I, Fenoglio R, De Marchi A, Besso L, Baldovino S, Rossi D, Miraglia P, Rubini E, Roccatello D. Anti-beta-2-glycoprotein I domain 1 identifies antiphospholipid antibodies-related injuries in patients with concomitant lupus nephritis. J Nephrol 2020; 33:757-762. [PMID: 31974856 DOI: 10.1007/s40620-019-00698-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Accepted: 12/30/2019] [Indexed: 11/29/2022]
Abstract
BACKGROUND In this study we aimed to evaluate the usefulness of domain profiling of Beta-2-glycoprotein I(β2GPI)-Domain-1 (D1) antibodies in relation to antiphospholipid antibodies (aPL)-related nephropathy (aPL-N) in patients with biopsy-proven lupus nephritis (LN). METHODS Of 124 consecutive patients (96 women, mean age 45.5 ± 12.3 years, mean disease duration 14.7 ± 9.6 years) fulfilling the 1982 criteria for systemic lupus erythematosus (SLE), we identified 39 patients (mean age 39.84 ± 8.6 years, mean disease duration 11.3 ± 7.7 years) with the following characteristics: (a) biopsy-proven LN; (b) no previous diagnosis of antiphospholipid syndrome (APS) according to the current classification criteria. RESULTS Patients with both LN and aPL-N had higher median aβ2GPI-D1 antibody titres (220.1 CU, 25-75th IQ 29.1-334.2) as compared those with LN alone (46.5 CU, 25-75th IQ 12.5-75.1) (p = 0.0087). Median aβ2GPI-D1 antibody titres were higher in patients with acute thrombotic microangiopathy (aTMA) (N = 7) (250.1 CU, 25-75th IQ 61.2-334.2) vs. with LN alone (46.5 CU, 25-75th IQ 12.5-75.1 CU) (p = 0.0009). Having a Global Antiphospholipid Syndrome Score > 10 confers an increased probability of having acute features of aTMA (OR 6.25, 95%CI 1.2-31.8). As compared to other aPL, aβ2GPI-D1 antibodies have the best diagnostic accuracy for aTMA as evaluated by performances in Area Under the Curves in a ROC analysis. CONCLUSIONS aβ2GPI-D1 antibodies detection might provide a second-line assay to be performed in aβ2GPI positive patients with LN, allowing more accurate stratification of the renal vascular involvement risk, thus potentially leading to a more tailored management.
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Affiliation(s)
- Savino Sciascia
- Department of Clinical and Biological Sciences, Center of Research of Immunopathology and Rare Diseases, Coordinating Center of Piemonte and Valle d'Aosta Network for Rare Diseases, SCDU Nephrology and Dialysis, S. Giovanni Bosco Hospital, Piazza del Donatore di Sangue 3, 10154, Turin, Italy.
| | - Massimo Radin
- Department of Clinical and Biological Sciences, Center of Research of Immunopathology and Rare Diseases, Coordinating Center of Piemonte and Valle d'Aosta Network for Rare Diseases, SCDU Nephrology and Dialysis, S. Giovanni Bosco Hospital, Piazza del Donatore di Sangue 3, 10154, Turin, Italy.,Department of Clinical and Biological Sciences, School of Specialization of Clinical Pathology, University of Turin, Turin, Italy
| | - Irene Cecchi
- Department of Clinical and Biological Sciences, Center of Research of Immunopathology and Rare Diseases, Coordinating Center of Piemonte and Valle d'Aosta Network for Rare Diseases, SCDU Nephrology and Dialysis, S. Giovanni Bosco Hospital, Piazza del Donatore di Sangue 3, 10154, Turin, Italy.,Department of Clinical and Biological Sciences, School of Specialization of Clinical Pathology, University of Turin, Turin, Italy
| | - Roberta Fenoglio
- Department of Clinical and Biological Sciences, Center of Research of Immunopathology and Rare Diseases, Coordinating Center of Piemonte and Valle d'Aosta Network for Rare Diseases, SCDU Nephrology and Dialysis, S. Giovanni Bosco Hospital, Piazza del Donatore di Sangue 3, 10154, Turin, Italy
| | | | - Luca Besso
- Nephrology and Dialysis, Santa Croce Hospital, Cuneo, Italy
| | - Simone Baldovino
- Department of Clinical and Biological Sciences, Center of Research of Immunopathology and Rare Diseases, Coordinating Center of Piemonte and Valle d'Aosta Network for Rare Diseases, SCDU Nephrology and Dialysis, S. Giovanni Bosco Hospital, Piazza del Donatore di Sangue 3, 10154, Turin, Italy
| | - Daniela Rossi
- Department of Clinical and Biological Sciences, Center of Research of Immunopathology and Rare Diseases, Coordinating Center of Piemonte and Valle d'Aosta Network for Rare Diseases, SCDU Nephrology and Dialysis, S. Giovanni Bosco Hospital, Piazza del Donatore di Sangue 3, 10154, Turin, Italy
| | - Paolo Miraglia
- Department of Clinical and Biological Sciences, Center of Research of Immunopathology and Rare Diseases, Coordinating Center of Piemonte and Valle d'Aosta Network for Rare Diseases, SCDU Nephrology and Dialysis, S. Giovanni Bosco Hospital, Piazza del Donatore di Sangue 3, 10154, Turin, Italy
| | - Elena Rubini
- Department of Clinical and Biological Sciences, Center of Research of Immunopathology and Rare Diseases, Coordinating Center of Piemonte and Valle d'Aosta Network for Rare Diseases, SCDU Nephrology and Dialysis, S. Giovanni Bosco Hospital, Piazza del Donatore di Sangue 3, 10154, Turin, Italy.,Department of Clinical and Biological Sciences, School of Specialization of Clinical Pathology, University of Turin, Turin, Italy
| | - Dario Roccatello
- Department of Clinical and Biological Sciences, Center of Research of Immunopathology and Rare Diseases, Coordinating Center of Piemonte and Valle d'Aosta Network for Rare Diseases, SCDU Nephrology and Dialysis, S. Giovanni Bosco Hospital, Piazza del Donatore di Sangue 3, 10154, Turin, Italy
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Shemer A, Willis R, Gonzalez EB, Romay-Penabad Z, Shovman O, Shoenfeld Y, Blank M, Amital H. Oral administration of Domain-I of beta-2glycoprotein-I induces immunological tolerance in experimental murine antiphospholipid syndrome. J Autoimmun 2019; 99:98-103. [PMID: 30797663 DOI: 10.1016/j.jaut.2019.02.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 02/07/2019] [Accepted: 02/10/2019] [Indexed: 11/26/2022]
Abstract
It is well established that the humoral immunity in antiphospholipid syndrome (APS) is presented by circulating pathogenic anti-β2GPI autoantibodies targeting mainly domain I of the β2GPI protein, playing a major role in the disease pathogenesis. Previously, we have demonstrated that treatment of experimental APS mice with tolerogenic dendritic cells loaded with domain-I was more efficient in tolerance induction than with the whole molecule or domain-V. In the current study we had orally administered a domain-I derivative of the β2GPI molecule, as a new therapeutic approach to induce oral tolerance in this mouse model of APS. BALB/c mice immunized with β2GPI, were fed with either domain-I, domain-V derivative or the complete β2GPI protein. β2GPI immunized mice developed experimental APS which were fed with domain-I significantly had decreased fetal loss (p < 0.004), a lower size of thrombi (p < 0.001) and lower circulating anti-β2GPI Abs in comparison to mice fed with domain-V or PBS (p < 0.002). Likewise, Domain-I fed mice had a lowered inflammatory response, exhibited by decreased expression of inflammatory cytokines (IFNγ, IL-6, IL-17) and elevated production of IL-10 anti-inflammatory cytokine by splenocytes. Moreover, the anti-inflammatory response in the domain-I fed APS mice was associated with increased circulating miRNA variations (155, 146, 182, 98) by RT-PCR, which are associated with immunomodulation of the immune network. We propose that oral tolerance with domain-I can be a novel therapy for patients with APS.
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Affiliation(s)
- Asaf Shemer
- The Zabludowicz Center for Autoimmune Diseases, affiliated to Sackler Faculty of Medicine Tel-Aviv University, Israel
| | - Rohan Willis
- Department of Internal Medicine, Rheumatology Division, University of Texas Medical Branch, Galveston, USA
| | - Emilio B Gonzalez
- Department of Internal Medicine, Rheumatology Division, University of Texas Medical Branch, Galveston, USA
| | - Zurina Romay-Penabad
- Department of Internal Medicine, Rheumatology Division, University of Texas Medical Branch, Galveston, USA
| | - Ora Shovman
- The Zabludowicz Center for Autoimmune Diseases, affiliated to Sackler Faculty of Medicine Tel-Aviv University, Israel
| | - Yehuda Shoenfeld
- The Zabludowicz Center for Autoimmune Diseases, affiliated to Sackler Faculty of Medicine Tel-Aviv University, Israel; Laboratory of Mosaic of Autoimmunity, Saint Petersburg State University, St. Petersburg, Russia
| | - Miri Blank
- The Zabludowicz Center for Autoimmune Diseases, affiliated to Sackler Faculty of Medicine Tel-Aviv University, Israel
| | - Howard Amital
- The Zabludowicz Center for Autoimmune Diseases, affiliated to Sackler Faculty of Medicine Tel-Aviv University, Israel; Department of Medicine 'B' Affiliated to Sackler Faculty of Medicine, Tel-Aviv University, Israel.
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8
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Cavazzana I, Andreoli L, Limper M, Franceschini F, Tincani A. Update on Antiphospholipid Syndrome: Ten Topics in 2017. Curr Rheumatol Rep 2018. [DOI: 10.1007/s11926-018-0718-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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9
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Chighizola CB, Pregnolato F, Andreoli L, Bodio C, Cesana L, Comerio C, Gerosa M, Grossi C, Kumar R, Lazzaroni MG, Mahler M, Mattia E, Nalli C, Norman GL, Raimondo MG, Ruffatti A, Tonello M, Trespidi L, Tincani A, Borghi MO, Meroni PL. Beyond thrombosis: Anti-β2GPI domain 1 antibodies identify late pregnancy morbidity in anti-phospholipid syndrome. J Autoimmun 2018; 90:76-83. [PMID: 29454510 DOI: 10.1016/j.jaut.2018.02.002] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Revised: 02/02/2018] [Accepted: 02/05/2018] [Indexed: 12/22/2022]
Abstract
Antibodies against β2 glycoprotein I (anti-β2GPI) have been identified as the main pathogenic autoantibody subset in anti-phospholipid syndrome (APS); the most relevant epitope is a cryptic and conformation-dependent structure on β2GPI domain (D) 1. Anti-β2GPI domain profiling has been investigated in thrombotic APS, leading to the identification of antibodies targeting D1 as the main subpopulation. In contrast, scarce attention has been paid to obstetric APS, hence this study aimed at characterizing the domain reactivity with regards to pregnancy morbidity (PM). To this end, 135 women with persistently positive, medium/high titre anti-β2GPI IgG, without any associated systemic autoimmune diseases and at least one previous pregnancy were included: 27 asymptomatic carriers; 53 women with obstetric APS; 20 women with thrombotic APS; and 35 women with both thrombotic and obstetric complications. Anti-D1 and anti-D4/5 antibodies were tested using a chemiluminescent immunoassay and a research ELISA assay, respectively (QUANTA Flash® β2GPI Domain 1 IgG and QUANTA Lite® β2GPI D4/5 IgG, Inova Diagnostics). Positivity for anti-D1 antibodies, but not anti-D4/5 antibodies, was differently distributed across the 4 subgroups of patients (p < 0.0001) and significantly correlated with thrombosis (χ2 = 17.28, p < 0.0001) and PM (χ2 = 4.28, p = 0.039). Patients with triple positivity for anti-phospholipid antibodies displayed higher anti-D1 titres and lower anti-D4/5 titres compared to women with one or two positive tests (p < 0.0001 and p = 0.005, respectively). Reactivity against D1 was identified as a predictor for PM (OR 2.4, 95% confidence interval [CI] 1.2-5.0, p = 0.017); in particular, anti-D1 antibodies were predictive of late PM, conveying an odds ratio of 7.3 (95% CI 2.1-25.5, p = 0.022). Positivity for anti-D1 antibodies was not associated with early pregnancy loss. Anti-D4/5 antibodies were not associated with clinical APS manifestations. As a whole, our data suggest that anti-D1 antibodies are significantly associated not only with thrombosis, but also with late PM, while positive anti-D4/5 antibodies are not predictive of thrombosis or PM.
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Affiliation(s)
- Cecilia Beatrice Chighizola
- Department of Clinical Sciences and Community Health, University of Milan, Via Festa del Perdono 7, 20122 Milan, Italy; Experimental Laboratory of Immunological and Rheumatologic Researches, IRCCS Istituto Auxologico Italiano, Via Zucchi 18, 20095 Cusano Milanino, Milan, Italy
| | - Francesca Pregnolato
- Experimental Laboratory of Immunological and Rheumatologic Researches, IRCCS Istituto Auxologico Italiano, Via Zucchi 18, 20095 Cusano Milanino, Milan, Italy
| | - Laura Andreoli
- Rheumatology and Clinical Immunology, Spedali Civili of Brescia, University of Brescia, Piazzale Spedali Civili 1, 25123 Brescia, Italy; Department of Clinical and Experimental Sciences, University of Brescia, Piazzale Spedali Civili 1, 25123 Brescia, Italy
| | - Caterina Bodio
- Department of Clinical Sciences and Community Health, University of Milan, Via Festa del Perdono 7, 20122 Milan, Italy; Experimental Laboratory of Immunological and Rheumatologic Researches, IRCCS Istituto Auxologico Italiano, Via Zucchi 18, 20095 Cusano Milanino, Milan, Italy
| | - Laura Cesana
- Experimental Laboratory of Immunological and Rheumatologic Researches, IRCCS Istituto Auxologico Italiano, Via Zucchi 18, 20095 Cusano Milanino, Milan, Italy
| | - Chiara Comerio
- Department of Obstetrics and Gynaecology, Fondazione Cà Granda, Ospedale Maggiore Policlinico, Via della Commenda 12, 20122 Milan, Italy
| | - Maria Gerosa
- Department of Clinical Sciences and Community Health, University of Milan, Via Festa del Perdono 7, 20122 Milan, Italy; Department of Rheumatology, ASST Istituto Gaetano Pini & CTO, Piazza Cardinal Ferrari, 1 20122 Milan, Italy
| | - Claudia Grossi
- Experimental Laboratory of Immunological and Rheumatologic Researches, IRCCS Istituto Auxologico Italiano, Via Zucchi 18, 20095 Cusano Milanino, Milan, Italy
| | - Rajesh Kumar
- Rheumatology and Clinical Immunology, Spedali Civili of Brescia, University of Brescia, Piazzale Spedali Civili 1, 25123 Brescia, Italy; Department of Clinical and Experimental Sciences, University of Brescia, Piazzale Spedali Civili 1, 25123 Brescia, Italy
| | - Maria Grazia Lazzaroni
- Rheumatology and Clinical Immunology, Spedali Civili of Brescia, University of Brescia, Piazzale Spedali Civili 1, 25123 Brescia, Italy; Department of Clinical and Experimental Sciences, University of Brescia, Piazzale Spedali Civili 1, 25123 Brescia, Italy
| | - Michael Mahler
- INOVA Diagnostics, 9900 Old Grove Road, San Diego, CA 92131-1638, USA
| | - Elena Mattia
- Rheumatology Unit, Department of Medicine, University of Padua, via Giustiniani 2, 35128 Padua, Italy
| | - Cecilia Nalli
- Rheumatology and Clinical Immunology, Spedali Civili of Brescia, University of Brescia, Piazzale Spedali Civili 1, 25123 Brescia, Italy; Department of Clinical and Experimental Sciences, University of Brescia, Piazzale Spedali Civili 1, 25123 Brescia, Italy
| | - Gary L Norman
- INOVA Diagnostics, 9900 Old Grove Road, San Diego, CA 92131-1638, USA
| | - Maria Gabriella Raimondo
- Department of Clinical Sciences and Community Health, University of Milan, Via Festa del Perdono 7, 20122 Milan, Italy; Department of Rheumatology, ASST Istituto Gaetano Pini & CTO, Piazza Cardinal Ferrari, 1 20122 Milan, Italy
| | - Amelia Ruffatti
- Rheumatology Unit, Department of Medicine, University of Padua, via Giustiniani 2, 35128 Padua, Italy
| | - Marta Tonello
- Rheumatology Unit, Department of Medicine, University of Padua, via Giustiniani 2, 35128 Padua, Italy
| | - Laura Trespidi
- Department of Obstetrics and Gynaecology, Fondazione Cà Granda, Ospedale Maggiore Policlinico, Via della Commenda 12, 20122 Milan, Italy
| | - Angela Tincani
- Rheumatology and Clinical Immunology, Spedali Civili of Brescia, University of Brescia, Piazzale Spedali Civili 1, 25123 Brescia, Italy; Department of Clinical and Experimental Sciences, University of Brescia, Piazzale Spedali Civili 1, 25123 Brescia, Italy
| | - Maria Orietta Borghi
- Department of Clinical Sciences and Community Health, University of Milan, Via Festa del Perdono 7, 20122 Milan, Italy; Experimental Laboratory of Immunological and Rheumatologic Researches, IRCCS Istituto Auxologico Italiano, Via Zucchi 18, 20095 Cusano Milanino, Milan, Italy
| | - Pier Luigi Meroni
- Department of Clinical Sciences and Community Health, University of Milan, Via Festa del Perdono 7, 20122 Milan, Italy; Experimental Laboratory of Immunological and Rheumatologic Researches, IRCCS Istituto Auxologico Italiano, Via Zucchi 18, 20095 Cusano Milanino, Milan, Italy; Department of Rheumatology, ASST Istituto Gaetano Pini & CTO, Piazza Cardinal Ferrari, 1 20122 Milan, Italy.
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10
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Mahler M, Albesa R, Zohoury N, Bertolaccini ML, Ateka-Barrutia O, Rodriguez-Garcia JL, Norman GL, Khamashta M. Autoantibodies to domain 1 of beta 2 glycoprotein I determined using a novel chemiluminescence immunoassay demonstrate association with thrombosis in patients with antiphospholipid syndrome. Lupus 2017; 25:911-6. [PMID: 27252269 DOI: 10.1177/0961203316640366] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
INTRODUCTION Antibodies to the domain 1 of beta 2 glycoprotein I (β2GPI-D1) have been suggested as a risk marker for thrombosis in patients with the antiphospholipid syndrome (APS). This cross-sectional study aimed to analyze the clinical utility of a novel chemiluminescence assay for the detection of anti-β2GPI-D1 antibodies. PATIENTS AND METHODS Sera collected from patients with primary or secondary APS (n = 106; 72 with and 34 without history of thrombosis) and controls (n = 272) were tested for anti-β2GPI-D1 IgG by chemiluminescence assay (QUANTA Flash) and by two anti-β2GPI IgG assays (QUANTA Lite and QUANTA Flash β2GPI IgG). RESULTS Anti-β2GPI-D1 IgG titers were significantly higher in patients with thrombosis (P = 0.0032) than those without. At the cut-off of 20 units, which yielded a 99.5% specificity, 24 of 72 (34.9%) patients with thrombosis and four of 34 (11.8%) without thrombosis were anti-β2GPI-D1 IgG positive (odds ratio, OR = 4.0). By further optimizing the cut-off specifically for correlation with thrombosis, 20.8% of the patients with thrombosis and 2.9% of the patients without thrombosis were positive (OR = 8.7). The ORs were significantly lower for antibodies to the full-length β2GPI by either the chemiluminescence assay or ELISA. Using the anti-β2GPI chemiluminescence assay, the OR was 2.3 (recommended cut-off of 20 CU) or 4.1 (optimal cut-off 164.6 CU). Using the anti-β2GPI ELISA, the OR was 2.7 (recommended cut-off of 20 units) or 3.7 (optimal cut-off 7.6 units). CONCLUSION These data indicate that anti-β2GPI-D1 IgG are present more frequently and in higher titers in APS patients with thrombotic complications than in those without.The novel β2GPI-D1 chemiluminescence assay appears to be superior to full-length β2GPI assays for the risk assessment of thrombotic events in APS patients.
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Affiliation(s)
- M Mahler
- Inova Diagnostics, Inc., San Diego, USA
| | - R Albesa
- Inova Diagnostics, Inc., San Diego, USA
| | - N Zohoury
- Inova Diagnostics, Inc., San Diego, USA
| | - M L Bertolaccini
- Academic Department of Vascular Surgery, King's College London, London, UK
| | - O Ateka-Barrutia
- Graham Hughes Lupus Research Laboratory, King's College London School of Medicine, London, UK
| | - J L Rodriguez-Garcia
- Graham Hughes Lupus Research Laboratory, King's College London School of Medicine, London, UK
| | | | - M Khamashta
- Graham Hughes Lupus Research Laboratory, King's College London School of Medicine, London, UK
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11
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Meroni PL. Anti-beta-2 glycoprotein I epitope specificity: from experimental models to diagnostic tools. Lupus 2016; 25:905-10. [DOI: 10.1177/0961203316641772] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Beta-2 glycoprotein I (β2GPI) is the main antigenic target for anti-phospholipid antibodies (aPL), the serological markers of anti-phospholipid syndrome (APS). Conformational changes of the molecule seem to be essential for exposing the cryptic epitope for aPL binding and to trigger pathogenic pathways. There is increasing evidence that a conformational epitope located in the Domain I (DI) of the molecule is the main epitope targeted by human autoantibodies. The pathogenic role of the DI epitope has been recently supported by in vivo models and by immuno-histopathological findings in APS patients. Antibodies targeting β2GPI-DI are more frequently detected in patients with full-blown APS compared to asymptomatic aPL carriers or patients with infectious diseases who have antibodies directed against the whole molecule. Anti-DI antibodies are positively correlated with medium to high titres of aPL, with the presence of lupus anticoagulant and thrombotic and pregnancy manifestations, enabling identification of patients at higher risk of clinical events. However, some APS patients develop antibodies reacting against β2GPI epitopes other than DI, suggesting that other anti-β2GPI antibody subsets may be clinically relevant. Although preliminary results suggest that anti-DI antibodies can be detected by different assays in a comparable manner, further prospective studies are needed to support their use in the clinical setting and their predictive value.
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Affiliation(s)
- P L Meroni
- Department of Clinical Sciences and Community Health, University of Milan, Laboratory of Immuno-rheumatology Research, Istituto Auxologico Italiano, Milan, Italy
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12
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Ho YC, Ahuja KDK, Körner H, Adams MJ. β 2GP1, Anti-β 2GP1 Antibodies and Platelets: Key Players in the Antiphospholipid Syndrome. Antibodies (Basel) 2016; 5:E12. [PMID: 31557993 PMCID: PMC6698853 DOI: 10.3390/antib5020012] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 04/26/2016] [Accepted: 04/26/2016] [Indexed: 12/21/2022] Open
Abstract
Anti-beta 2 glycoprotein 1 (anti-β2GP1) antibodies are commonly found in patients with autoimmune diseases such as the antiphospholipid syndrome (APS) and systemic lupus erythematosus (SLE). Their presence is highly associated with increased risk of vascular thrombosis and/or recurrent pregnancy-related complications. Although they are a subtype of anti-phospholipid (APL) antibody, anti-β2GP1 antibodies form complexes with β2GP1 before binding to different receptors associated with anionic phospholipids on structures such as platelets and endothelial cells. β2GP1 consists of five short consensus repeat termed "sushi" domains. It has three interchangeable conformations with a cryptic epitope at domain 1 within the molecule. Anti-β2GP1 antibodies against this cryptic epitope are referred to as 'type A' antibodies, and have been suggested to be more strongly associated with both vascular and obstetric complications. In contrast, 'type B' antibodies, directed against other domains of β2GP1, are more likely to be benign antibodies found in asymptomatic patients and healthy individuals. Although the interactions between anti-β2GP1 antibodies, β2GP1, and platelets have been investigated, the actual targeted metabolic pathway(s) and/or receptor(s) involved remain to be clearly elucidated. This review will discuss the current understanding of the interaction between anti-β2GP1 antibodies and β2GP1, with platelet receptors and associated signalling pathways.
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Affiliation(s)
- Yik C Ho
- School of Health Sciences, University of Tasmania, Locked Bag 1322, Launceston, Tasmania 7250, Australia.
| | - Kiran D K Ahuja
- School of Health Sciences, University of Tasmania, Locked Bag 1322, Launceston, Tasmania 7250, Australia.
| | - Heinrich Körner
- Menzies Institute for Medical Research, University of Tasmania, Private Bag 23, Hobart, Tasmania 7001, Australia.
| | - Murray J Adams
- School of Health Sciences, University of Tasmania, Locked Bag 1322, Launceston, Tasmania 7250, Australia.
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13
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Artenjak A, Omersel J, Ahlin Grabnar P, Mlinarič-Raščan I, Shoenfeld Y, Sodin-Semrl S, Božič B, Čučnik S. Oxidatively altered IgG with increased immunoreactivity to β2-glycoprotein I and its peptide clusters influence human coronary artery endothelial cells. Lupus 2015; 24:448-62. [PMID: 25801888 DOI: 10.1177/0961203314561073] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Oxidative stress has been shown to play a role in modifying antibodies in favor of higher auto-immunoreactivity. We studied the immunoreactivity of oxidized IgG (oxIgG) to β2-glycoprotein I (β2GPI), six peptide sequences corresponding to amino acid clusters on its different domains, to determine their effects on human coronary artery endothelial cells (HCAEC). Human IgG was purified from seven donors, electro-oxidized and checked for immunoreactivity and avidity to β2GPI and to peptides by ELISA. Conformational stability and antibody-antigen complex formation of oxIgG was analyzed by fluorescence spectroscopy and dynamic light scattering. Resting and activated sub-confluent HCAEC were stimulated with oxIgG or IgG. Secreted cytokines were measured by ELISA. Immunoreactivity of seven oxIgG samples increased to 7.5-fold against β2GPI and to 3.8-fold against six peptides as compared to IgG. oxIgG showed low avidity "properties." Conformational changes and exposure of protein hydrophobic regions were confirmed by an elevation in fluorescence (2.4- to 5.0-fold) on bis-ANS dye binding to oxIgG. oxIgG significantly elevated the release of GROα and IL-8 in resting and activated states of HCAEC. Oxidation alters IgG in favor of autoreactivity toward whole β2GPI and corresponding peptides on different domains of β2GPI and could lead to dysfunction of arterial endothelium by upregulation of chemokines.
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Affiliation(s)
- A Artenjak
- Department of Rheumatology, University Medical Centre Ljubljana, Ljubljana, Slovenia
| | - J Omersel
- The chair of Clinical Biochemistry, Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| | - P Ahlin Grabnar
- The chair of Pharmaceutical Technology, Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| | - I Mlinarič-Raščan
- The chair of Clinical Biochemistry, Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| | - Y Shoenfeld
- The Zabludowicz Center for Autoimmune Diseases, Sheba Medical Center, Tel-Hashomer, Israel
| | - S Sodin-Semrl
- Department of Rheumatology, University Medical Centre Ljubljana, Ljubljana, Slovenia Faculty of Mathematics, Natural Sciences and Information Technologies, University of Primorska, Koper, Slovenia
| | - B Božič
- Department of Rheumatology, University Medical Centre Ljubljana, Ljubljana, Slovenia The chair of Clinical Biochemistry, Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| | - S Čučnik
- Department of Rheumatology, University Medical Centre Ljubljana, Ljubljana, Slovenia
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14
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Artenjak A, Locatelli I, Brelih H, Simonič DM, Ulcova-Gallova Z, Swadzba J, Musial J, Iwaniec T, Stojanovich L, Conti F, Valesini G, Avčin T, Cohen Tervaert JW, Shoenfeld Y, Blank M, Ambrožič A, Sodin-Semrl S, Božič B, Čučnik S. Immunoreactivity and avidity of IgG anti-β2-glycoprotein I antibodies from patients with autoimmune diseases to different peptide clusters of β2-glycoprotein I. Immunol Res 2015; 61:35-44. [PMID: 25395339 DOI: 10.1007/s12026-014-8578-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The pathogenicity of antibodies against β2-glycoprotein I (anti-β2GPI) depends on multiple factors such as subclass type, epitope binding and avidity. Due to their large heterogeneity, their impact on antiphospholipid syndrome (APS) onset is still not fully clarified. We studied the binding characteristics of IgG anti-β2GPI with known avidity from sera of 201 autoimmune patients (87 with APS, 67 with APS associated with systemic lupus erythematosus (SLE), 47 with only SLE) to six β2GPI peptides corresponding to amino acid clusters on domains I-II, II, III and III-IV by indirect ELISA and evaluated their association with clinical features of APS. Peptides A (LKTPRV; domain I-II), B (KDKATF; domain IV) and C (TLRVYK; domain III) were derived from a hexapeptide phage display library previously shown to react with pathogenic monoclonal anti-β2GPI. Peptides D (NGPANSK; domain III), E (YNPLWFV; domain II) and F (KMDGNHP; domain III-IV) represent surface amino acid clusters on β2GPI. The percentage of patients positive for peptides were observed as follows: 30.3% for peptide D, 28.90% for B, 25.9% for C, 24.9% for E, 24.4% for F and 10.0% for A. The anti-peptide antibodies in studied serum samples were predominantly of heterogeneous avidity, followed by law avidity anti-peptide antibodies, whereas only a few were of high avidity. Positive and negative correlations were found between several anti-peptide antibodies and the rate of thrombosis. Our results indicated diverse reactivity of IgG anti-β2GPI to different epitopes on β2GPI. Classification of IgG anti-β2GPI into subgroups regarding epitope specificity and avidity could represent an additional tool in understanding their pathogenicity in APS.
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Affiliation(s)
- A Artenjak
- Lek Pharmaceuticals d.d., Sandoz Biopharmaceuticals Mengeš, Kolodvorska 27, 1234, Menges, Slovenia
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15
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Andreoli L, Chighizola CB, Nalli C, Gerosa M, Borghi MO, Pregnolato F, Grossi C, Zanola A, Allegri F, Norman GL, Mahler M, Meroni PL, Tincani A. Clinical characterization of antiphospholipid syndrome by detection of IgG antibodies against β2 -glycoprotein i domain 1 and domain 4/5: ratio of anti-domain 1 to anti-domain 4/5 as a useful new biomarker for antiphospholipid syndrome. Arthritis Rheumatol 2015; 67:2196-204. [PMID: 25939498 DOI: 10.1002/art.39187] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Accepted: 04/30/2015] [Indexed: 11/12/2022]
Abstract
OBJECTIVE It has been suggested that only antibodies against domain 1 (D1) of β2 -glycoprotein I (β2 GPI) are pathogenic and diagnostic. The role of antibodies against other β2 GPI domains is still debated. This study was undertaken to evaluate the clinical relevance of domain specificity profiling of anti-β2 GPI IgG antibodies in antiphospholipid syndrome (APS) patients and in control groups of patients with systemic autoimmune rheumatic diseases and in asymptomatic antiphospholipid antibody (aPL) carriers. METHODS We evaluated 159 subjects with persistently positive, medium or high-titer anti-β2 GPI IgG, including 56 patients with thrombotic (obstetric or nonobstetric) primary APS, 31 women with obstetric primary APS, 42 aPL-positive patients with systemic autoimmune rheumatic diseases, and 30 asymptomatic aPL carriers. One hundred healthy donors were included. Anti-β2 GPI D1 and D4/5 IgG were tested on research enzyme-linked immunosorbent assays containing recombinant β2 GPI domains. RESULTS As compared to other groups, aPL carriers displayed higher frequency/titer of anti-D4/5 IgG. Unlike anti-D4/5, anti-D1 IgG antibodies were more frequent and at higher titer in triple than in single or double aPL-positive subjects. An anti-D1 to anti-D4/5 ratio of ≥1.5 was predictive of systemic autoimmunity (odds ratio 3.25 [95% confidence interval 1.45-7.49], P = 0.005). Neither anti-D1 nor anti-D4/5 antibodies were associated with APS clinical criteria. CONCLUSION Anti-D1 IgG is the preferential specificity not only in vascular and obstetric primary APS, but also in patients with systemic autoimmune rheumatic disease with no clinical features of APS. Conversely, aPL carriers do not have a polarized profile toward D1. Combined testing for anti-β2 GPI IgG with different domain specificity allows a more accurate aPL profiling, with polarization toward anti-D1 IgG as a possible fingerprint of systemic autoimmunity.
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Affiliation(s)
| | | | | | - Maria Gerosa
- University of Milan and Istituto G. Pini, Milan, Italy
| | - M Orietta Borghi
- University of Milan and IRCCS Istituto Auxologico Italiano, Milan, Italy
| | | | | | | | | | | | | | - Pier Luigi Meroni
- University of Milan and IRCCS Istituto Auxologico Italiano, Milan, Italy
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16
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Zandman-Goddard G, Pierangeli SS, Gertel S, Blank M. Tolerogenic dendritic cells specific for β2-glycoprotein-I Domain-I, attenuate experimental antiphospholipid syndrome. J Autoimmun 2014; 54:72-80. [PMID: 24972993 DOI: 10.1016/j.jaut.2014.06.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Accepted: 06/04/2014] [Indexed: 11/19/2022]
Abstract
Tolerogenic dendritic cells (tDCs) have the potential to control the outcome of autoimmunity by modulating the immune response. The aim of this study was to uncover the tolerance efficacy attributed to beta-2-glycoprotein-I (β2GPI) tDCs or β2GPI domain-I (D-I) and domain-V (D-V)-tDCs in mice with antiphospholipid syndrome (APS). tDCs were pulsed with β2GPI or D-I or D-V derivatives. Our results revealed that β2GPI related tDCs phenotype includes CD80(high), CD86(high) CD40(high) MHC class II(high). The miRNA profiling encompass miRNA 23b(high), miRNA 142-3p(low) and miRNA 221(low). In addition the β2GPI related tDCs showed reduced secretion of IL-1β, IL-12 and IL-23. D-I tDCs treatment was more efficient than β2GPI tDCs in inducing of tolerance in APS mice, manifested by lowered titers of anti- β2GPI antibodies (Abs) and reduced percentage of fetal loss. Tolerance induction was accompanied by poor T cell response to β2GPI, high numbers of CD4 + CD25 + FOXP3 + T-regulatory cells (Treg), reduced levels of IFNγ, IL-17 and increased expression of IL-10 and TGFβ. Tolerance was successfully transferred by Treg cells from the tolerized mice to β2GPI immunized mice. We conclude that predominantly D-I-tDCs and β2GPI tDCs have the potential to attenuate experimental APS by induction of Treg cells, reduction of anti- β2GPI Abs titers and increased expression of anti-inflammatory cytokines. We suggest that β2-GPI-D-I-tDCs may offer a novel approach for developing therapy for APS patients.
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Affiliation(s)
- Gisele Zandman-Goddard
- The Zabludowicz Center For Autoimmune Diseases, Sheba Medical Center, Tel-Hashomer, Sackler Faculty of Medicine Tel-Aviv University, 52621, Israel; Department of Medicine C, Wolfson Medical Center, Sackler Faculty of Medicine Tel-Aviv University, Holon, Israel
| | - Silvia S Pierangeli
- Antiphospholipid Standardization Laboratory, Division of Rheumatology, Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, USA
| | - Smadar Gertel
- The Zabludowicz Center For Autoimmune Diseases, Sheba Medical Center, Tel-Hashomer, Sackler Faculty of Medicine Tel-Aviv University, 52621, Israel
| | - Miri Blank
- The Zabludowicz Center For Autoimmune Diseases, Sheba Medical Center, Tel-Hashomer, Sackler Faculty of Medicine Tel-Aviv University, 52621, Israel.
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17
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Meroni PL, Chighizola CB, Rovelli F, Gerosa M. Antiphospholipid syndrome in 2014: more clinical manifestations, novel pathogenic players and emerging biomarkers. Arthritis Res Ther 2014; 16:209. [PMID: 25166960 PMCID: PMC4060447 DOI: 10.1186/ar4549] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
The clinical spectrum of the anti-phospholipid syndrome (APS) is not limited to vascular thrombosis or miscarriages but includes additional manifestations that cannot be explained solely by a thrombophilic state. Anti-cardiolipin, anti-beta₂ glycoprotein I (anti-β₂GPI) and lupus anticoagulant (LA) assays are not only the formal diagnostic and classification laboratory tools but also parameters to stratify the risk to develop the clinical manifestations of the syndrome. In particular, anti-β₂GPI antibodies reacting with an immunodominant epitope on domain I of the molecule were reported as the prevalent specificity in APS patients, correlating with a more aggressive clinical picture. Several laboratory assays to improve the diagnostic and predictive power of the standard tests have been proposed. Plates coated with the phosphatidylserine-prothrombin complex for detecting antibodies represent a promising laboratory tool correlating with LA and with clinical manifestations. Anti-phospholipid antibodies can be found in patients with full-blown APS, in those with thrombotic events or obstetric complications only or in asymptomatic carriers. An inflammatory second hit is required to increase the presence of β₂GPI in vascular tissues, eventually triggering thrombosis. Post-transcriptional modifications of circulating β₂GPI, different epitope specificities or diverse anti-β₂GPI antibody-induced cell signaling have all been suggested to affect the clinical manifestations and/or to modulate their occurrence.
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Affiliation(s)
- Pier Luigi Meroni
- Division of Rheumatology - Istituto Ortopedico Gaetano Pini, Department of Clinical Sciences and Community Health, University of Milan, 20122 Milan, Italy
- Istituto Auxologico Italiano, via Zucchi 18, 20095 Cusano Milanino, Mi, Italy
| | - Cecilia Beatrice Chighizola
- Division of Rheumatology - Istituto Ortopedico Gaetano Pini, Department of Clinical Sciences and Community Health, University of Milan, 20122 Milan, Italy
- Istituto Auxologico Italiano, via Zucchi 18, 20095 Cusano Milanino, Mi, Italy
| | - Francesca Rovelli
- Division of Rheumatology - Istituto Ortopedico Gaetano Pini, Department of Clinical Sciences and Community Health, University of Milan, 20122 Milan, Italy
| | - Maria Gerosa
- Division of Rheumatology - Istituto Ortopedico Gaetano Pini, Department of Clinical Sciences and Community Health, University of Milan, 20122 Milan, Italy
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Xie H, Sheng L, Zhou H, Yan J. The role of TLR4 in pathophysiology of antiphospholipid syndrome-associated thrombosis and pregnancy morbidity. Br J Haematol 2013; 164:165-76. [PMID: 24180619 DOI: 10.1111/bjh.12587] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Hongxiang Xie
- Department of Cardiology; Affiliated Hospital of Jiangsu University; Zhenjiang China
- Department of Clinical Laboratory and Haematology; School of Medical Science and Laboratory Medicine of Jiangsu University; Zhenjiang China
| | - Liangju Sheng
- Department of Clinical Laboratory and Haematology; School of Medical Science and Laboratory Medicine of Jiangsu University; Zhenjiang China
| | - Hong Zhou
- Department of Cardiology; Affiliated Hospital of Jiangsu University; Zhenjiang China
- Department of Clinical Laboratory and Haematology; School of Medical Science and Laboratory Medicine of Jiangsu University; Zhenjiang China
| | - Jinchuan Yan
- Department of Cardiology; Affiliated Hospital of Jiangsu University; Zhenjiang China
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Kwak-Kim J, Agcaoili MSL, Aleta L, Liao A, Ota K, Dambaeva S, Beaman K, Kim JW, Gilman-Sachs A. Management of women with recurrent pregnancy losses and antiphospholipid antibody syndrome. Am J Reprod Immunol 2013; 69:596-607. [PMID: 23521391 DOI: 10.1111/aji.12114] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Accepted: 02/20/2013] [Indexed: 02/06/2023] Open
Abstract
Antiphospholipid antibodies (aPL) have been associated with recurrent pregnancy losses (RPL) and other obstetrical complications. The diagnostic criteria for the classical antiphospholipid antibody syndrome (APS) have been utilized for the detection of obstetrical APS in women with RPL. However, laboratory findings and immunopathology of obstetrical APS are significantly different from those of classical APS. In addition, many women with RPL who have positive aPL do not have symptoms consistent with the current APS criteria. The induction of a proinflammatory immune response from trophoblasts and complement activation by aPL rather than thromboembolic changes has been reported as a major immunopathological feature of obstetrical APS. Heparin treatment has been reported to be effective in prevention of early pregnancy loss with APS but not for the late pregnancy loss or complications. The complex effects of heparin may explain the limited efficacy of heparin treatment in RPL. New diagnostic criteria for obstetrical APS are needed urgently, and new therapeutic approaches should be explored further.
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Affiliation(s)
- Joanne Kwak-Kim
- Reproductive Medicine, Department of Obstetrics and Gynecology, The Chicago Medical School at Rosalind Franklin University of Medicine and Science, Vernon Hills, IL 60061, USA.
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20
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Peluso S, Antenora A, De Rosa A, Roca A, Maddaluno G, Brescia Morra V, De Michele G. Antiphospholipid-related chorea. Front Neurol 2012; 3:150. [PMID: 23097646 PMCID: PMC3477765 DOI: 10.3389/fneur.2012.00150] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Accepted: 10/02/2012] [Indexed: 12/18/2022] Open
Abstract
Chorea is a movement disorder which may be associated with immunologic diseases, in particular in the presence of antiphospholipid antibodies (aPL). Choreic movements have been linked to the isolated presence of plasmatic aPL, or to primary, or secondary antiphospholipid syndrome. The highest incidence of aPL-related chorea is detected in children and females. The presentation of chorea is usually subacute and the course monophasic. Choreic movements can be focal, unilateral, or generalized. High plasmatic titers of aPL in a choreic patient can suggest the diagnosis of aPL-related chorea; neuroimaging investigation does not provide much additional diagnostic information. The most relevant target of aPL is β2-glycoprotein I, probably responsible for the thrombotic manifestations of antiphospholipid syndrome. Etiology of the movement disorder is not well understood but a neurotoxic effect of aPL has been hypothesized, leading to impaired basal ganglia cell function and development of neuroinflammation. Patients affected by aPL-related chorea have an increased risk of thrombosis and should receive antiplatelet or anticoagulant treatment.
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Affiliation(s)
- Silvio Peluso
- Department of Neurological Sciences, Federico II University Naples, Italy
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21
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De Groot PG, Meijers JCM, Urbanus RT. Recent developments in our understanding of the antiphospholipid syndrome. Int J Lab Hematol 2012; 34:223-31. [PMID: 22394675 DOI: 10.1111/j.1751-553x.2012.01414.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The antiphospholipid syndrome is an autoimmune disease that manifests clinically as recurrent thrombotic complications or foetal losses and serologically with elevated levels of antiphospholipid antibodies in the plasmas of these patients. The term 'antiphospholipid syndrome' is confusing, because the auto-antibodies are not directed against phospholipids but towards a plasma protein, β(2) -glycoprotein I. For many years, the reason why auto-antibodies against β(2) -glycoprotein I were pro-thrombotic was unclear, because β(2) -glycoprotein I seems to be an obsolete protein in our circulation. Human and mice deficient in this protein do not express a clear phenotype. Recent studies on the structure and function of β(2) -glycoprotein I have provided novel insights into the importance of this protein in physiology and its role in the pathology of the antiphospholipid syndrome.
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Affiliation(s)
- P G De Groot
- Department of Clinical Chemistry and Haematology, University Medical Center, Utrecht, The Netherlands.
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23
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Stojanovich L, Markovic O, Marisavljevic D, Elezovic I, Ilijevski N, Stanisavljevic N. Influence of antiphospholipid antibody levels and type on thrombotic manifestations: results from the Serbian National Cohort Study. Lupus 2011; 21:338-45. [PMID: 21993381 DOI: 10.1177/0961203311422710] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Repeated thromboses are the most frequent clinical manifestation of antiphospholipid syndrome (APS) in the presence of antiphospholipid antibodies (aPL). The objective of this study was to observe the prevalence and localization of thrombosis, and to investigate the importance of aPL type and level for thrombosis-related events in patients diagnosed with APS. These are the first results of patients enrolled in Serbian National Cohort Study which comprises 256 patients: 162 with primary antiphospholipid syndrome (PAPS) and 94 with APS associated with systemic lupus erythematosus (SLE). aPL analysis included detection of aCL (IgG/IgM), β(2)GPI, and lupus anticoagulant. Thrombosis was diagnosed in 119 (46.5%) patients, with higher prevalence in PAPS compared with SLE patients (51.2% and 38.3%, respectively, p = 0.045). There was similar prevalence of arterial thrombosis in PAPS and SLE groups (34.6% and 34%, respectively, p = 0.932) although venous thrombosis was more frequent in PAPS (25.9% and 8.5%, respectively, p = 0.001). Thrombosis was observed in 92 (55.8%) patients who had more than one type of antibody (category I), in 13 (41.9%) patients with category IIa, in 19 (46.3%) patients with category IIb, and in 73 (44.2%) patients with category IIc (p = 0.10). The patients with thrombosis were older than those without thrombosis (49.8 and 39.8 years, respectively, p = 0.001). Overall, older age was a risk factor for thrombosis. The prevalence of venous thrombosis was higher in the PAPS group, but with lower frequency than in literature data. Any aPL type and level is a risk factor for thrombosis.
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Affiliation(s)
- L Stojanovich
- Internal medicine, Bezanijska Kosa, University Medical Center, Belgrade, Serbia
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Müller C, Thaler M, Schlichtiger A, Schreiegg A, Balling G, Steigerwald U, Luppa PB. β2-glycoprotein I-derived peptides as antigenic structures for the detection of antiphospholipid antibodies. J Thromb Haemost 2010; 8:2073-5. [PMID: 20629942 DOI: 10.1111/j.1538-7836.2010.03987.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ioannou Y, Rahman A. Domain I of beta2-glycoprotein I: its role as an epitope and the potential to be developed as a specific target for the treatment of the antiphospholipid syndrome. Lupus 2010; 19:400-5. [PMID: 20353977 DOI: 10.1177/0961203309360544] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Antiphospholipid syndrome (APS) represents one of the most common acquired causes of thrombophilia and recurrent miscarriages. The only treatment of proven benefit is anticoagulation, often required at high intensity and life-long duration. This therapy can be associated with side effects such as bleeding and is not always effective. Hence, there remains a need for safer, targeted and ideally more effective therapies. Antiphospholipid antibodies (aPL) are pathogenic and promote thrombosis. Independent groups, including our own, have show that the major epitopes that pathogenic aPL targets lie within domain I of the protein beta2-glycoprotein I (beta2GPI). This review focuses on the evidence presented thus far which characterizes the immunodominant epitopes within domain I, demonstrating that the epitope is a conformational one centred around residues R39-G43 and also involving other residues within domain I, such as residues D8 and D9. The hypothesis is proposed that a recombinant domain I molecule, and a recombinant mutant domain I with enhanced aPL binding properties, may be used as an inhibitor of aPL binding and thus inhibit aPL-induced pathogenicity. In vivo proof-of-concept studies within the murine femoral vein injury model are presented supporting this hypothesis, and the rationale as well as potential benefits and problems of employing such an approach to treat APS are discussed.
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Affiliation(s)
- Y Ioannou
- Centre for Rheumatology Research, Windeyer Building, University College London, London, UK.
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Kondo A, Miyamoto T, Yonekawa O, Giessing AM, Østerlund EC, Jensen ON. Glycopeptide profiling of beta-2-glycoprotein I by mass spectrometry reveals attenuated sialylation in patients with antiphospholipid syndrome. J Proteomics 2009; 73:123-33. [DOI: 10.1016/j.jprot.2009.08.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2009] [Revised: 08/15/2009] [Accepted: 08/18/2009] [Indexed: 11/29/2022]
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Abstract
The antiphospholipid syndrome (APS) is the most common acquired thrombophilia. It is characterized by venous and arterial thrombosis, recurrent pregnancy loss, and various other clinical manifestations in the presence of antiphospholipid antibodies (aPL). Like other autoimmune diseases, the etiology of APS derives from a combination of genetic and environmental factors. The most significant environmental factors in APS are infectious agents, followed by trauma and drugs. Infections can induce aPL and, in the catastrophic variant of APS, about one-third of cases are associated with a clear recent infection. On their formation, aPL have been clearly shown to be pathogenic, because they influence all arms of the coagulation system and because passive transfer and active immunization protocols have demonstrated. Therefore, in a genetically susceptible individual, exposure to one or more infectious agent can cause a molecular mimicry and result in the production of pathogenic aPL that can induce thrombosis and pregnancy loss. Identification of the epitopes within the beta-2-glycoprotein-I molecule that serves as the target for autoantibodies makes them the target for immunomodulation of the syndrome.
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Krause I, Leibovici L, Blank M, Shoenfeld Y. Clusters of disease manifestations in patients with antiphospholipid syndrome demonstrated by factor analysis. Lupus 2007; 16:176-80. [PMID: 17432102 DOI: 10.1177/0961203306075977] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The antiphospholipid syndrome (APS) is now recognized as a multi-system disease, the clinical expression of which may include various target-organs involvements. Despite the reported heterogeneity in clinical presentation of APS, the interrelations between various manifestations of the disease has not yet been studied. We evaluated the principle associations between a variety of clinical manifestations in APS patients, applying factor analysis. Two-hundred and forty-six APS patients were studied. The following disease manifestations were used for the factor analysis: recurrent fetal loss, intrauterine growth restriction (IUGR), venous and arterial thrombosis, cardiac valves thickening/dysfunction, valvular vegetations, stroke, epilepsy, migraine, arthritis, livedo reticularis, thrombocytopenia, leukopenia and autoimmune hemolytic anemia (AIHA). The results were further analysed in relation to sex and to primary APS versus APS associated with SLE. Five factors were derived, which accounted for 59.7% of the variance of the matrix. Factor 1 (which explained 18.5% of variance of the original matrix) represented the association between cardiac valves abnormalities, livedo reticularis and AIHA. Factor 2 (13.8% of variance) represented association between arthritis, thrombocytopenia and leukopenia. Factor 3 (10.3% of variance) represented an association between recurrent fetal loss and IUGR. Factor 4 (9.3% of variance) represented inverse correlation between arterial and venous thrombosis. Factor 5 (7.8% of variance) represented an association between epilepsy and migraine. Application of factor analysis revealed specific clusters of cardiac, cutaneous, hematological and neurological manifestations. Our result also point to a possible divergence of arterial and venous thrombotic tendency. Awareness of these patterns might give us a better understanding of the disease.
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Affiliation(s)
- I Krause
- Department of Medicine E, Rabin Medical Center, Beilinson Campus, Israel
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Sodin-Semrl S, Rozman B. Beta2-glycoprotein I and its clinical significance: from gene sequence to protein levels. Autoimmun Rev 2007; 6:547-52. [PMID: 17854747 DOI: 10.1016/j.autrev.2007.02.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2007] [Accepted: 02/07/2007] [Indexed: 11/22/2022]
Abstract
In order to elucidate beta2-GPI at the DNA level and characterize its polymorphisms, mRNA expression, protein levels and clinical significance at each of these steps, a molecular review of beta2-GPI literature was performed. The human beta2-GPI complete nucleotide sequence has been reported and it consists of 8 exons separated by large introns. The beta2-GPI gene is polymorphic with four alleles. The distribution of point mutations can be significantly different between various racial populations. DNA variation studies of the beta2-GPI gene identified a total of 151 single-nucleotide polymorphisms, 26 of which are within regions with potential clinical significance. Southern blot analysis indicated the presence of one gene product only. An atypical TATA box and a hepatic nuclear factor-1 element are both essential for beta2-GPI promoter activity. Transcription factor binding sites for STAT, CREB, C/EBPbeta, NF-1, AP-1, NFAT, HNF-3beta and HNF-1 have been identified in the promoter region of the beta2-GPI gene by computer analysis. The beta2-GPI transcriptional signal of 1.5 kb was detected in Northern blot analysis and its 326-amino-acid sequence was found to be one of the most proline-rich eukaryotic proteins. Amino acid substitutions have been shown to be associated with loss of phospholipid binding, development and recognition of antiphospholipid antibodies.
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Affiliation(s)
- S Sodin-Semrl
- University Medical Centre, Division of Internal Medicine, Department of Rheumatology, Vodnikova 62, 1000 Ljubljana, Slovenia.
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Ioannou Y, Pericleous C, Giles I, Latchman DS, Isenberg DA, Rahman A. Binding of antiphospholipid antibodies to discontinuous epitopes on domain I of human beta(2)-glycoprotein I: mutation studies including residues R39 to R43. ACTA ACUST UNITED AC 2007; 56:280-90. [PMID: 17195232 PMCID: PMC2117024 DOI: 10.1002/art.22306] [Citation(s) in RCA: 114] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Pathogenic antiphospholipid antibodies (aPL) bind the self antigen N-terminal domain (domain I) of beta(2)-glycoprotein I (beta(2)GPI), with residues G40-R43 being important. However, peptides homologous to other regions of domain I have also been shown to bind aPL. Furthermore, there are no published reports of the effects of altering R39, which has greater surface exposure than the G40-R43 residues. METHODS We used a novel, efficient method of production and purification of human domain I by Escherichia coli to create multiple mutants of domain I. These domain I mutants were then screened for binding to a range of polyclonal IgG purified from patients with antiphospholipid syndrome, using both solid-phase and fluid-phase assays. RESULTS E coli-expressed purified domain I selectively bound IgG derived from patients with antiphospholipid syndrome. In region R39-R43, the R39S mutation had the greatest effect in terms of reducing binding to a panel of aPL in the fluid phase (mean +/- SD inhibition 14 +/- 18.5% versus 44.1 +/- 31.7% for G40E and 62.9 +/- 25.7% for wild-type domain I). Conversely, altering both D8 and D9 to S8 and G9, respectively, had the effect of enhancing binding to aPL in the fluid phase. Adding the remainder of the domain I-II interlinker resulted in enhanced binding over wild-type in the solid phase but not the fluid phase. CONCLUSION The binding of aPL to beta(2)GPI domain I is complex and likely to involve discontinuous epitopes that include R39 in addition to G40-R43, the domain I-II interlinker, and possibly D8 and D9. Domain I variants with enhanced binding to aPL compared with wild-type domain I may aid in the development of novel therapies.
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Shoenfeld Y, Blank M, Cervera R, Font J, Raschi E, Meroni PL. Infectious origin of the antiphospholipid syndrome. Ann Rheum Dis 2006; 65:2-6. [PMID: 16344491 PMCID: PMC1797971 DOI: 10.1136/ard.2005.045443] [Citation(s) in RCA: 126] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Harel M, Aron-Maor A, Sherer Y, Blank M, Shoenfeld Y. The infectious etiology of the antiphospholipid syndrome: links between infection and autoimmunity. Immunobiology 2005; 210:743-7. [PMID: 16325492 DOI: 10.1016/j.imbio.2005.10.004] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2005] [Accepted: 08/30/2005] [Indexed: 11/19/2022]
Abstract
Like many other autoimmune diseases, the antiphospholipid syndrome (APS) is considered as of a multifactorial etiology, mainly genetic susceptibility coinciding with environmental triggers, of which infectious agents are considered most prominent. Different clinical and experimental studies of the beta2 glycoprotein I (beta 2 GPI) molecule, one of the target autoantigens in APS, have linked infection to the development of APS. Using a peptide phage library, it has been shown that target epitopes of beta 2 GPI share similarities with common infectious pathogens. Also, circulating anti-beta 2 GPI antibodies have been identified in the sera of patients with different infectious conditions, and have been associated with various clinical APS manifestations. Molecular mimicry as a key mechanism linking infection and APS has been demonstrated in experimental models. In these studies, APS was induced by immunization of mice to various microbial pathogens. Anti-beta 2 GPI titers were found to be especially high following immunization with Haemophilus influenzae, Neisseria gonorrheae or tetanus toxoid. These findings contribute greatly to the understanding of APS pathogenesis, as well as create new directions for therapy modalities, namely specific peptide toleragens and antimicrobial treatment.
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Affiliation(s)
- Michal Harel
- Department of Medicine 'B' and Center of Autoimmune Diseases, Sheba Medical Center, Tel-Hashomer 52621, Israel
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Ulcova-Gallova Z, Krauz V, Novakova P, Milichovska L, Micanova Z, Bibkova K, Sucha R, Turek J, Balvin M, Rokyta Z. Anti-Phospholipid Antibodies against Phosphatidylinositol, and Phosphatidylserine are More Significant in Reproductive Failure than Antibodies against Cardiolipin only. Am J Reprod Immunol 2005; 54:112-7. [PMID: 16105103 DOI: 10.1111/j.1600-0897.2005.00294.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
PROBLEM The humoral immune response to phospholipids was investigated in women with reproductive failure [1073 women after one in vitro fertilization (IVF), 853 women after two and more IVF, 627 women after three and more repeated spontaneous miscarriages or missed abortions, 412 women after diagnostic laparoscopy] and compared with that of 391 healthy fertile women. METHOD OF STUDY Sera from all women in the study were tested by enzyme-linked immunosorbent assay (ELISA) for the detection of IgG, IgA, and IgM isotypes of antibodies against seven phospholipids (aPLs), i.e. cardiolipin, L-phosphatidylserine, phosphatidylglycerol, phosphatidylinositol, phosphatidylethanolamine, phosphatidylacid as well as against beta2-glycoprotein I. RESULTS Patients after two and more IVF (48 and 50%, respectively), patients with three and more repeated spontaneous miscarriages (50 and 46.5%, respectively) are associated with significantly higher serum levels of aPLs against inositol, and L-serine (P < 0.01). A quarter of them were positive for three and more aPLs. CONCLUSION It seems that determination of aPLs only against cardiolipin in reproductive failure is not sufficient for obstetric-gynecology diagnosis as the primary anti-phospholipid syndrome. Our long-ranging study (from 1998 to 2003) shows the necessity to test for a complete aPLs profile. Sera from patients after two and more IVF procedures, and sera from women after three and more repeated abortions are immunologically more active than sera from women after one unsuccessful IVF and sera from women after diagnostic laparoscopy. This important result is very significant for future treatment.
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Affiliation(s)
- Zdenka Ulcova-Gallova
- Department of Obstetrics and Gynecology, Medical Faculty of Charles University, Faculty Hospital, Pilsen, Czech Republic.
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Abstract
Antiphospholipid syndrome is a distinct disorder with the clinical features of recurrent thrombosis in the venous or arterial circulation and fetal losses. Its serological marker is the presence of antiphospholipid antibodies in the blood of these patients. The relation between the presence of antibodies against anionic phospholipids and thromboembolic complications is well established over the last 25 years but the pathophysiology of the syndrome is largely unclear. Even after all these years, there is a persisting debate about the specificity and sensitivity of the assays for the detection of antiphospholipid antibodies. We now accept that antibodies to beta2-glycoprotein I rather than to anionic phospholipids are the major pathological antibodies, although there is no clear consensus on how the presence of these antibodies correlates with the different clinical manifestations of the syndrome. In this review, we discuss the current methods of detection of the antibodies and our insight into the pathobiology of the syndrome. We propose a mechanism for describing how the presence of anti-beta2-glycoprotein I antibodies relates to the different clinical manifestations observed.
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Affiliation(s)
- P G de Groot
- Department of Haematology, University Medical Center Utrecht, Utrecht, The Netherlands.
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von Landenberg P, Baumgartner M, Schoelmerich J, Lackner KJ, Klein R. Clinical Relevance of Antiphospholipid Antibodies in Primary Biliary Cirrhosis. Ann N Y Acad Sci 2005; 1051:20-8. [PMID: 16126941 DOI: 10.1196/annals.1361.043] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Primary biliary cirrhosis (PBC) is a cholestatic liver disease characterized by the presence of antimitochondrial autoantibodies (AMAs), but also with reactivities to other autoantigens. Recent studies showed that antibodies to phospholipids (APAs) represent an important group of autoantibodies identified in patients with PBC. In this study different types of APAs were identified in the sera of patients with PBC and autoimmune hepatitis (AIH) and control subjects. Sera from patients with PBC and AIH were tested for the presence of antibodies directed against cardiolipin (CL), phosphatidylserine (PS), and to beta(2)-glycoprotein I (beta(2)-GPI). Furthermore, an in-house test for antithromboplastin antibodies was performed. Antinuclear antibodies (ANAs) and antimitochondrial antibodies (AMAs) were tested with standard tests. IgM anti-PS antibodies were found in 75% of the 51 PBC patients, but only in 4% of the 48 AIH patients (P < 0.0001). IgM anti-CL antibodies were more frequently detected in AIH than in PBC (75% vs. 89%; P = 0.045). IgM anti-beta(2)-GPI antibodies were observed more frequently in patients with AIH (83%) than with PBC (59%; P = 0.007). The APAs of the IgG type did not differ significantly between the groups of patients. Considering the clinical/laboratory parameters, the levels of alkaline phosphatase (P = 0.017), glutamate pyruvate transaminase (P = 0.035), and glutamate oxalacetate transaminase (P = 0.034) were significantly higher in PBC patients who were positive for IgM anti-PS antibodies than in the anti-PS antibody-negative patients. In conclusion, APAs are present in PBC patients with a higher level of the disease or more intense liver damage than in patients without APAs. Thus IgM anti-PS antibodies represent a new marker of activity in PBC patients.
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Affiliation(s)
- Philipp von Landenberg
- Institute of Clinical Chemistry and Laboratory Medicine, Johannes Gutenberg University, Langenbeck Strasse 1, 55131 Mainz.
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de Groot PG, Derksen RHMW. The antiphospholipid syndrome: clinical characteristics, laboratory features and pathogenesis. Curr Opin Infect Dis 2005; 18:205-10. [PMID: 15864096 DOI: 10.1097/01.qco.0000168379.01272.53] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE OF REVIEW The antiphospholipid syndrome is characterized by the paradoxical linkage between thrombosis in vivo and prolongation of clotting times in vitro. Recent reports that are discussed in this overview have taught us that this inconsistency is not so incomprehensible after all. RECENT FINDINGS Only a subpopulation of the heterogeneous population of antiphospholipid antibodies is pathogenic. New hypotheses have been proposed to explain the thrombotic tendency in this syndrome. In contrast to what is generally thought, it seems that the increased risk of thrombotic complication is independent of chronic vascular disease. SUMMARY The latest developments could make it possible to define patients with the syndrome unambiguously. This is absolutely necessary to facilitate studies designed to test the current hypotheses on the pathophysiology of antiphospholipid syndrome.
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Affiliation(s)
- Philip G de Groot
- Department of Haematology, University Medical Center Utrecht, The Netherlands.
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Iverson GM, Victoria EJ, Cockerill KA, Linnik MD. Advances in understanding what we measure when detecting anticardiolipin autoantibodies. Clin Chim Acta 2004; 343:37-44. [PMID: 15115676 DOI: 10.1016/j.cccn.2004.01.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2003] [Revised: 01/02/2004] [Accepted: 01/16/2004] [Indexed: 11/22/2022]
Abstract
Understanding so-called anticardiolipin autoantibodies has been the focus of significant interest due to their accepted role in the pathology of antiphospholipid syndrome (APS). How these antibodies contribute to thrombosis, stroke and recurrent fetal loss is not clearly understood. A precise determination of the antigenic epitope(s) recognized by anticardiolipin autoantibodies will contribute to an understanding of their role in this complex disease; however, there have been many conflicting reports regarding these epitope(s), and many of the apparent contradictions arise from the assay systems that have been used. In this review, we attempt to highlight what we believe are the salient points on this issue. We present further evidence supporting our hypothesis that most of these autoantibodies recognize epitope(s) located on domain 1 (DI) of beta2-glycoprotein 1 (beta2GPI).
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Affiliation(s)
- G Michael Iverson
- La Jolla Pharmaceutical Company, 6455 Nancy Ridge Drive, San Diego, CA 92121, USA.
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de Groot PG, Derksen RHWM. Antiphospholipid antibodies: update on detection, pathophysiology, and treatment. Curr Opin Hematol 2004; 11:165-9. [PMID: 15257015 DOI: 10.1097/01.moh.0000130313.95291.4a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW The antiphospholipid syndrome is a noninflammatory disease characterized by the presence of antiphospholipid antibodies in the plasma of patients with venous or arterial thrombosis or obstetric complications. Understanding of the pathology of the syndrome is only rudimentary and no physician can pretend that treatment is adequate. It is not possible to identify patients with the syndrome for certain. This paper reviews the substantial and promising headway made in the past year. RECENT FINDINGS It has become clear that lupus anticoagulant is the assay of choice to detect the syndrome and that antibodies directed towards beta2Glycoprotein 1 are the clinical relevant autoantibodies. These antibodies are able to activate a number of cells involved in the regulation of hemostasis. SUMMARY The latest developments will make it soon possible to define patient with the syndrome unambiguously. This is absolutely necessary to understand why the presence of antiphospholipid antibodies cause an increased thrombotic risk.
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Affiliation(s)
- Philip G de Groot
- Departments of Haematology and Rheumatology & Clinical Immunology, University Medical Centre, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands.
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Blank M, Shani A, Goldberg I, Kopolovic J, Amigo MC, Magrini L, Shoenfeld Y. Libman–Sacks endocarditis associated with antiphospholipid syndrome and infection. Thromb Res 2004; 114:589-92. [PMID: 15507295 DOI: 10.1016/j.thromres.2004.06.039] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2004] [Revised: 06/24/2004] [Accepted: 06/24/2004] [Indexed: 11/27/2022]
Abstract
INTRODUCTION Antiphospholipid syndrome (APS) is a systemic autoimmune disease, associated not only with a hypercoagulable state and recurrent fetal loss but with many diverse clinical manifestations including heart involvement, neurological manifestations, as well as skin, kidney and hematologic abnormalities. Cardiac manifestations include coronary by-pass graft and angioplasty occlusions, cardiomyopathy, cyanotic congenital heart disease, intracardiac thrombus and complications of cardiovascular surgery. The valvular heart disease was defined as Libman-Sacks nonbacterial endocarditis. Previously, we have shown a linear subendothelial deposition of anti-cardiolipin/beta2 glycoprotein I (beta2GPI) antibodies in the valve specimens derived from APS patients. The involvement of complement C3c in the pathogenesis was documented. We assessed the beta2GPI-related target epitope recognized by the anti-beta2GPI Abs on the valves. MATERIALS AND METHODS In order to find the beta2GPI-related target epitopes recognized by the anti-beta2GPI antibodies on the valves, we used beta2GPI-related synthetic peptides. The presence of anti-beta2GPI Abs on the studied valves was detected by anti-idiotypic antibody, followed by immunoperoxidase analysis. Biotin attached to the N-terminal of beta2GPI-related synthetic peptides and control peptide were used to identify the epitope addressed by the anti-beta2GPI Abs deposited on the patient's valve. The binding was probed by streptavidin-peroxidase and appropriate substrate. The specificity was confirmed by competition assays with control peptide and anti-idiotypic antibody. RESULTS Among the beta2GPI-related synthetic peptides, two peptides were found in previous studies to mimic common pathogens either bacteriae or viruses, which raised a possible infectious origin for APS. One of these peptides, TLRVYK, is a specific target for anti-beta2GPI Abs deposited on the APS valves. This synthetic peptide was able to displace the anti-anti-beta2GPI anti-idiotypic Abs for binding the anti-beta2GPI Abs on the valve by a competition assay. CONCLUSION We point to the possibility that Libman-Sacks nonbacterial endocarditis may have an infectious origin.
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Affiliation(s)
- M Blank
- Department of Medicine B, The Center for Autoimmune Diseases, Sheba Medical Center, Tel-Hashomer 52621, Israel
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