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Postmus T, Graça NAG, Ferreira de Santana J, Ercig B, Langerhorst P, Luken B, Joly BS, Vanhoorelbeke K, Veyradier A, Coppo P, Voorberg J. Impact of N-glycan mediated shielding of ADAMTS-13 on the binding of pathogenic antibodies in immune thrombotic thrombocytopenic purpura. J Thromb Haemost 2023; 21:3402-3413. [PMID: 37633643 DOI: 10.1016/j.jtha.2023.08.017] [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: 12/31/2022] [Revised: 08/17/2023] [Accepted: 08/17/2023] [Indexed: 08/28/2023]
Abstract
BACKGROUND Thrombotic thrombocytopenic purpura (TTP) is a rare thrombotic disorder, with 1.5 to 6.0 cases per million per year. The majority of patients with TTP develop inhibitory autoantibodies that predominantly target the spacer domain of ADAMTS-13. ADAMTS-13 is responsible for cleaving von Willebrand factor (VWF) multimers, thereby regulating platelet adhesion at sites of high-vascular shear stress. Inhibition and/or clearance of ADAMTS-13 by pathogenic autoantibodies results in accumulation of VWF multimers that promotes the formation of platelet-rich microthrombi. Previously, we have shown that insertion of a single N-glycan (NGLY) in the spacer domain prevents the binding of antispacer domain antibodies. OBJECTIVES To explore whether NGLY mediated shielding of the ADAMTS-13 spacer domain effectively prevents binding of pathogenic antispacer autoantibodies in patients with immune-mediated TTP (iTTP). METHODS We screened 5 NGLY-ADAMTS-13 variants (NGLY3, NGLY7, NGLY8, NGLY3+7, and NGLY3+8) for binding of autoantibodies and for their activity in the presence and absence of 50 samples derived from patients with iTTP. RESULTS NGLY variants showed greatly reduced antibody binding, down to 27% of wild-type (wt) ADAMTS-13 binding. Moreover, NGLY variants of ADAMTS-13 remained more active in FRETS-VWF73 assay in the presence of the plasma samples from these 50 patients with acute phase iTTP when compared with wtADAMTS-13. On average, wtADAMTS-13 activity was reduced to 37% of regular levels in the presence of plasma, while NGLY3 and NGLY3+7 remained 69% and 81% active, respectively. CONCLUSION These results reinforce our previous findings that NGLYs shield ADAMTS-13 from antibody binding and hence restore ADAMTS-13 activity in the presence of autoantibodies.
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Affiliation(s)
- Tim Postmus
- Department of Molecular Hematology, Sanquin-Academic Medical Center Landsteiner Laboratory, Amsterdam, The Netherlands
| | - Nuno A G Graça
- Department of Molecular Hematology, Sanquin-Academic Medical Center Landsteiner Laboratory, Amsterdam, The Netherlands
| | - Juliana Ferreira de Santana
- Department of Molecular Hematology, Sanquin-Academic Medical Center Landsteiner Laboratory, Amsterdam, The Netherlands
| | - Bogac Ercig
- Division of Biochemistry and Oncode Institute, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Pieter Langerhorst
- Department of Molecular Hematology, Sanquin-Academic Medical Center Landsteiner Laboratory, Amsterdam, The Netherlands
| | | | - Bérangère S Joly
- Centre National de Référence des Microangiopathies Thrombotiques, hôpital Saint-Antoine, AP-HP. Sorbonne Université, Paris, France; Service d'hématologie biologique, hôpital Lariboisière et EA3518 Institut de Recherche Saint-Louis, AP-HP. Nord, Université Paris Cité, Paris, France
| | - Karen Vanhoorelbeke
- Laboratory for Thrombosis Research, IRF Life Sciences, KU Leuven Campus Kulak Kortrijk, Kortrijk, Belgium
| | - Agnès Veyradier
- Centre National de Référence des Microangiopathies Thrombotiques, hôpital Saint-Antoine, AP-HP. Sorbonne Université, Paris, France; Service d'hématologie biologique, hôpital Lariboisière et EA3518 Institut de Recherche Saint-Louis, AP-HP. Nord, Université Paris Cité, Paris, France
| | - Paul Coppo
- Centre National de Référence des Microangiopathies Thrombotiques, hôpital Saint-Antoine, AP-HP. Sorbonne Université, Paris, France; Service d'hématologie biologique, hôpital Lariboisière et EA3518 Institut de Recherche Saint-Louis, AP-HP. Nord, Université Paris Cité, Paris, France
| | - Jan Voorberg
- Department of Molecular Hematology, Sanquin-Academic Medical Center Landsteiner Laboratory, Amsterdam, The Netherlands; Department of Experimental Vascular Medicine, Amsterdam UMC, Amsterdam, The Netherlands.
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Bonnez Q, Sakai K, Vanhoorelbeke K. ADAMTS13 and Non-ADAMTS13 Biomarkers in Immune-Mediated Thrombotic Thrombocytopenic Purpura. J Clin Med 2023; 12:6169. [PMID: 37834813 PMCID: PMC10573396 DOI: 10.3390/jcm12196169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 09/20/2023] [Accepted: 09/21/2023] [Indexed: 10/15/2023] Open
Abstract
Immune-mediated thrombotic thrombocytopenic purpura (iTTP) is a rare medical emergency for which a correct and early diagnosis is essential. As a severe deficiency in A Disintegrin And Metalloproteinase with ThromboSpondin type 1 repeats, member 13 (ADAMTS13) is the underlying pathophysiology, diagnostic strategies require timely monitoring of ADAMTS13 parameters to differentiate TTP from alternative thrombotic microangiopathies (TMAs) and to guide initial patient management. Assays for conventional ADAMTS13 testing focus on the enzyme activity and presence of (inhibitory) anti-ADAMTS13 antibodies to discriminate immune-mediated TTP (iTTP) from congenital TTP and guide patient management. However, diagnosis of iTTP remains challenging when patients present borderline ADAMTS13 activity. Therefore, additional biomarkers would be helpful to support correct clinical judgment. Over the last few years, the evaluation of ADAMTS13 conformation has proven to be a valuable tool to confirm the diagnosis of acute iTTP when ADAMST13 activity is between 10 and 20%. Screening of ADAMTS13 conformation during long-term patient follow-up suggests it is a surrogate marker for undetectable antibodies. Moreover, some non-ADAMTS13 parameters gained notable interest in predicting disease outcome, proposing meticulous follow-up of iTTP patients. This review summarizes non-ADAMTS13 biomarkers for which inclusion in routine clinical testing could largely benefit differential diagnosis and follow-up of iTTP patients.
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Affiliation(s)
- Quintijn Bonnez
- Department of Chemistry, KU Leuven Campus Kulak Kortrijk, 8500 Kortrijk, Belgium
| | - Kazuya Sakai
- Department of Chemistry, KU Leuven Campus Kulak Kortrijk, 8500 Kortrijk, Belgium
- Department of Blood Transfusion Medicine, Nara Medical University, Kashihara 634-8522, Japan
| | - Karen Vanhoorelbeke
- Department of Chemistry, KU Leuven Campus Kulak Kortrijk, 8500 Kortrijk, Belgium
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Halkidis K, Meng C, Liu S, Mayne L, Siegel DL, Zheng XL. Mechanisms of inhibition of human monoclonal antibodies in immune thrombotic thrombocytopenic purpura. Blood 2023; 141:2993-3005. [PMID: 37023370 PMCID: PMC10315623 DOI: 10.1182/blood.2022019252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 02/17/2023] [Accepted: 03/12/2023] [Indexed: 04/08/2023] Open
Abstract
Antibody binding to a plasma metalloprotease, a disintegrin and metalloproteinase with thrombospondin type 1 repeats 13 (ADAMTS13), is necessary for the development of immune thrombotic thrombocytopenic purpura (iTTP). Inhibition of ADAMTS13-mediated von Willebrand factor (VWF) cleavage by such antibodies clearly plays a role in the pathophysiology of the disease, although the mechanisms by which they inhibit ADAMTS13 enzymatic function are not fully understood. At least some immunoglobulin G-type antibodies appear to affect the conformational accessibility of ADAMTS13 domains involved in both substrate recognition and inhibitory antibody binding. We used single-chain fragments of the variable region previously identified via phage display from patients with iTTP to explore the mechanisms of action of inhibitory human monoclonal antibodies. Using recombinant full-length ADAMTS13, truncated ADAMTS13 variants, and native ADAMTS13 in normal human plasma, we found that, regardless of the conditions tested, all 3 inhibitory monoclonal antibodies tested affected enzyme turnover rate much more than substrate recognition of VWF. Hydrogen-to-deuterium exchange plus mass spectrometry experiments with each of these inhibitory antibodies demonstrated that residues in the active site of the catalytic domain of ADAMTS13 are differentially exposed to solvent in the presence and absence of monoclonal antibody binding. These results support the hypothesis that inhibition of ADAMTS13 in iTTP may not necessarily occur because the antibodies directly prevent VWF binding, but instead because of allosteric effects that impair VWF cleavage, likely by affecting the conformation of the catalytic center in the protease domain of ADAMTS13. Our findings provide novel insight into the mechanism of autoantibody-mediated inhibition of ADAMTS13 and pathogenesis of iTTP.
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Affiliation(s)
- Konstantine Halkidis
- Division of Hematologic Malignancies and Cellular Therapeutics, Department of Internal Medicine, The University of Kansas Medical Center, Kansas City, KS
| | - Chan Meng
- Division of Hematologic Malignancies and Cellular Therapeutics, Department of Internal Medicine, The University of Kansas Medical Center, Kansas City, KS
| | - Szumam Liu
- Department of Pathology and Laboratory Medicine, The University of Kansas Medical Center, Kansas City, KS
| | - Leland Mayne
- Department of Biochemistry and Molecular Biophysics, University of Pennsylvania, Philadelphia, PA
| | - Don L. Siegel
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA
| | - X. Long Zheng
- Department of Pathology and Laboratory Medicine, The University of Kansas Medical Center, Kansas City, KS
- Institute of Reproductive Medicine and Developmental Sciences, The University of Kansas Medical Center, Kansas City, KS
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ADAMTS13 conformation and immunoprofiles in Japanese patients with immune-mediated thrombotic thrombocytopenic purpura. Blood Adv 2022; 7:131-140. [PMID: 36306339 PMCID: PMC9830168 DOI: 10.1182/bloodadvances.2022008885] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 09/13/2022] [Accepted: 09/30/2022] [Indexed: 01/18/2023] Open
Abstract
Immune-mediated thrombotic thrombocytopenic purpura (iTTP) is an ultrarare thrombotic disease caused by autoantibody-induced ADAMTS13 deficiency. Open ADAMST13 conformation, induced by autoantibodies, was identified as a novel biomarker for iTTP. Determining immunoprofiles in patients with iTTP has been shown to guide the development of novel targeted therapies. However, these studies were done in mainly Caucasian iTTP cohorts. To validate those findings across other ethnic cohorts, we investigated 195 acute TTP plasma samples from the Japanese iTTP registry. Seventy-six of the 195 samples had detectable ADAMTS13 antigen levels, of which 94.7% were shown to have an open ADAMTS13 conformation. A positive correlation was observed between ADAMTS13 inhibitor titers (a diagnostic parameter in Japan) and anti-ADAMTS13 immunoglobulin G autoantibody titers. Studying anti-M, anti-DT, anti-CS, anti-T2-T5, anti-T6-T8, anti-CUB1-2 autoantibodies and the corresponding immunoprofile showed that 73% of the patients had anti-CS autoantibodies and 25.8% had anti-M autoantibodies, with the latter being higher than in Caucasians. Stratifying patients according to their immunoprofiles revealed that the profile with only anti-CS autoantibodies was the most common immunoprofile similar to that in Caucasians (28.9%). Although this profile did not affect the 1-year TTP-related mortality rate, patients with autoantibodies against all 6 ADAMTS13 fragments had a higher risk for TTP-related death than other patients (P = .02). We here validated open ADAMTS13 as a novel biomarker for acute iTTP and determined the dominant immunoprofiling in the Japanese cohort, contributing to setting up the diagnosis and managing guidelines across different ethnic cohorts and developing ADAMTS13 variants that do not bind to the anti-CS autoantibodies.
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5
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Kangro K, Roose E, Dekimpe C, Vandenbulcke A, Graça NAG, Voorberg J, Ustav M, Männik A, Vanhoorelbeke K. Improvement of recombinant ADAMTS13 production through a more optimal signal peptide or an N-terminal fusion protein. J Thromb Haemost 2022; 20:2379-2385. [PMID: 35841209 DOI: 10.1111/jth.15819] [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: 04/22/2022] [Revised: 06/26/2022] [Accepted: 07/12/2022] [Indexed: 11/30/2022]
Abstract
BACKGROUND Recombinant human ADAMTS13 (rADAMTS13) is a key protein in fundamental research for investigating its mode of action and the pathophysiology of thrombotic thrombocytopenic purpura (TTP). However, the expression of rADAMTS13 is quite low in mammalian cells, which makes the production of the protein time-consuming and labor-intensive. OBJECTIVES We aimed at increasing the yield of rADAMTS13 by (1) using a more optimal signal peptide (SP) and (2) constructing an N-terminal fusion protein of ADAMTS13 with human serum albumin domain 1 (AD1-ADAMTS13). METHODS Six SPs were investigated to select the most optimal SP. Expression plasmids containing the most optimal SP and ADAMTS13 cDNA or the fusion construct AD1-ADAMTS13 were generated and transiently transfected into CHOEBNALT85 cell-line. Expression levels of rADAMTS13 in expression medium were analyzed and compared with the expression level of rADAMTS13 with native SP (nat-SP). RESULTS Expression of rADAMTS13 with coagulation factor VII (FVII) SP was 3-fold higher (16.00 μg/ml) compared with the expression with nat-SP (5.03 μg/ml). The highest yields were obtained with AD1-ADAMTS13 protein with a 15-fold higher concentration (78.22 μg/ml) compared with the expression with nat-SP. The rADAMTS13 expressed with FVII-SP retained its activity (104.0%) to cleave von Willebrand factor, whereas AD1-ADAMTS13 demonstrated even higher activity (144.3%). CONCLUSION We succeeded in generating expression vectors that yield (1) rADAMTS13 at higher levels because of more optimal FVII-SP and (2) high levels of AD1-ADAMTS13 N-terminal fusion protein. The highest expression levels were obtained with AD1-ADAMTS13 N-terminal fusion protein, which is paving the way for highly efficient protein production.
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Affiliation(s)
- Kadri Kangro
- Laboratory for Thrombosis Research, IRF Life Sciences, KU Leuven Campus Kulak Kortrijk, Kortrijk, Belgium
- Icosagen Cell Factory OÜ, Õssu, Kambja vald, Estonia
| | - Elien Roose
- Laboratory for Thrombosis Research, IRF Life Sciences, KU Leuven Campus Kulak Kortrijk, Kortrijk, Belgium
| | - Charlotte Dekimpe
- Laboratory for Thrombosis Research, IRF Life Sciences, KU Leuven Campus Kulak Kortrijk, Kortrijk, Belgium
| | - Aline Vandenbulcke
- Laboratory for Thrombosis Research, IRF Life Sciences, KU Leuven Campus Kulak Kortrijk, Kortrijk, Belgium
| | - Nuno A G Graça
- Icosagen Cell Factory OÜ, Õssu, Kambja vald, Estonia
- Department of Molecular Hematology, Sanquin-Academic Medical Center Landsteiner Laboratory, Amsterdam, The Netherlands
| | - Jan Voorberg
- Department of Molecular Hematology, Sanquin-Academic Medical Center Landsteiner Laboratory, Amsterdam, The Netherlands
- Department of Experimental Vascular Medicine, Amsterdam UMC, Amsterdam, The Netherlands
| | - Mart Ustav
- Icosagen Cell Factory OÜ, Õssu, Kambja vald, Estonia
| | - Andres Männik
- Icosagen Cell Factory OÜ, Õssu, Kambja vald, Estonia
| | - Karen Vanhoorelbeke
- Laboratory for Thrombosis Research, IRF Life Sciences, KU Leuven Campus Kulak Kortrijk, Kortrijk, Belgium
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Anti-cysteine/spacer antibodies that open ADAMTS13 are a common feature in iTTP. Blood Adv 2021; 5:4480-4484. [PMID: 34559219 PMCID: PMC8579268 DOI: 10.1182/bloodadvances.2021004971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 07/20/2021] [Indexed: 11/20/2022] Open
Abstract
An open ADAMTS13 conformation is a novel biomarker for iTTP and is induced by anti-ADAMTS13 autoantibodies. The autoantibodies against the CS region play an important role in the appearance of an open ADAMTS13 conformation.
Immune-mediated thrombotic thrombocytopenic purpura (iTTP) is caused by an autoantibody-mediated deficiency in ADAMTS13. In healthy individuals, ADAMTS13 has a folded conformation in which the central spacer (S) domain interacts with the C-terminal CUB domains. We recently showed that ADAMTS13 adopts an open conformation in iTTP and that patient immunoglobulin G antibodies (IgGs) can open ADAMTS13. Anti-ADAMTS13 autoantibodies in patients with iTTP are directed against the different ADAMTS13 domains, but almost all patients have autoantibodies binding to the cysteine/spacer (CS) domains. In this study, we investigated whether the autoantibodies against the CS and CUB domains can disrupt the S-CUB interaction of folded ADAMTS13, thereby opening ADAMTS13. To this end, we purified anti-CS and anti-CUB autoantibodies from 13 patients with acute iTTP by affinity chromatography. The successfully purified anti-CS (10/13 patients) and anti-CUB (4/13 patients) autoantibody fractions were tested further in our ADAMTS13 conformation enzyme-linked immunosorbent assay to study whether they could open ADAMTS13. Interestingly, all purified anti-CS fractions (10/10 patients) were able to open ADAMTS13. On the other hand, only half of the purified anti-CUB fractions (2/4 patients) opened ADAMTS13. Our finding highlights that anti-CS autoantibodies that open ADAMTS13 are a common feature of the autoimmune response in iTTP.
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Anti-ADAMTS13 autoantibody profiling in patients with immune-mediated thrombotic thrombocytopenic purpura. Blood Adv 2021; 5:3427-3435. [PMID: 34495312 DOI: 10.1182/bloodadvances.2020004172] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 05/30/2021] [Indexed: 12/27/2022] Open
Abstract
Anti-A Disintegrin and Metalloproteinase with a ThromboSpondin type 1 motif, member 13 (ADAMTS13) autoantibodies cause a severe ADAMTS13 deficiency in immune-mediated thrombotic thrombocytopenic purpura (iTTP). ADAMTS13 consists of a metalloprotease (M), a disintegrin-like (D) domain, 8 thrombospondin type 1 repeats (T1-T8), a cysteine-rich (C), a spacer (S), and 2 CUB domains (CUB1-2). We recently developed a high-throughput epitope mapping assay based on small, nonoverlapping ADAMTS13 fragments (M, DT, CS, T2-T5, T6-T8, CUB1-2). With this assay, we performed a comprehensive epitope mapping using 131 acute-phase samples and for the first time a large group of remission samples (n = 50). Next, samples were stratified according to their immunoprofiles, a field that is largely unexplored in iTTP. Three dominant immunoprofiles were found in acute-phase samples: profile 1: only anti-CS autoantibodies (26.7%); profile 2: both anti-CS and anti-CUB1-2 autoantibodies (12.2%); and profile 3: anti-DT, anti-CS, anti-T2-T5, anti-T6-T8, and anti-CUB1-2 autoantibodies (8.4%). Interestingly, profile 1 was the only dominant immunoprofile in remission samples (52.0%). Clinical data were available for a relatively small number of patients with acute iTTP (>68), and no correlation was found between immunoprofiles and disease severity. Nevertheless, profile 1 was linked with younger and anti-T2-T5 autoantibodies with older age and the absence of anti-CUB1-2 autoantibodies with cerebral involvement. In conclusion, identifying acute phase and remission immunoprofiles in iTTP revealed that anti-CS autoantibodies seem to persist or reappear during remission providing further support for the clinical development of a targeted anti-CS autoantibody therapy. A large cohort study with acute iTTP samples will validate possible links between immunoprofiles or anti-domain autoantibodies and clinical data.
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Dekimpe C, Roose E, Kangro K, Bonnez Q, Vandenbulcke A, Tellier E, Kaplanski G, Feys HB, Tersteeg C, Männik A, De Meyer SF, Vanhoorelbeke K. Determination of anti-ADAMTS-13 autoantibody titers in ELISA: Influence of ADAMTS-13 presentation and autoantibody detection. J Thromb Haemost 2021; 19:2248-2255. [PMID: 33728786 DOI: 10.1111/jth.15297] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 03/10/2021] [Accepted: 03/10/2021] [Indexed: 11/26/2022]
Abstract
BACKGROUND Immune-mediated thrombotic thrombocytopenic purpura (iTTP) is caused by inhibitory and/or clearing anti-ADAMTS-13 (A Disintegrin and Metalloprotease with ThromboSpondin type 1 repeats, member 13) autoantibodies. To determine the presence and total level of anti-ADAMTS-13 autoantibodies, commercial and in-house developed ELISAs are performed. However, different ELISA methods vary in relation to the presentation of recombinant (r)ADAMTS-13 and the detection method of the anti-ADAMTS-13 autoantibodies. Currently, the influence of those different approaches on anti-ADAMTS-13 autoantibody titers is not known. OBJECTIVES To assess the influence of different ADAMTS-13 presentation- and autoantibody detection methods on anti-ADAMTS-13 autoantibody titers in ELISA. MATERIALS/METHODS Anti-ADAMTS-13 autoantibody titers from 18 iTTP patients were determined using four different set-ups of anti-ADAMTS-13 autoantibody ELISAs. The ELISAs varied in the used presentation of rADAMTS-13 (directly coated full-length rADAMTS-13, directly coated rMDTCS and rT2C2, or antibody-captured full-length rADAMTS-13) and the detection antibodies (polyclonal anti-human IgG or monoclonal anti-human IgG1-4 antibodies). RESULTS Strong correlations between the different anti-ADAMTS-13 autoantibody ELISA approaches were observed, when using polyclonal anti-human IgG detection antibodies recognizing all IgG subclasses similarly, independent of the method of rADAMTS-13 presentation. Anti-ADAMTS-13 autoantibody titers correlated less when using a mixture of monoclonal anti-human IgG1-4 , because not all IgG subclasses were recognized with similar affinities. CONCLUSION Anti-ADAMTS-13 autoantibody levels using different methods of rADAMTS-13 presentation strongly correlate. However, the levels of anti-ADAMTS-13 autoantibodies are highly dependent on the detection antibody used, which should detect all IgG subclasses (IgG1-4 ) equally well.
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Affiliation(s)
- Charlotte Dekimpe
- Laboratory for Thrombosis Research, IRF Life Sciences, KU Leuven Campus Kulak Kortrijk, Kortrijk, Belgium
| | - Elien Roose
- Laboratory for Thrombosis Research, IRF Life Sciences, KU Leuven Campus Kulak Kortrijk, Kortrijk, Belgium
| | - Kadri Kangro
- Laboratory for Thrombosis Research, IRF Life Sciences, KU Leuven Campus Kulak Kortrijk, Kortrijk, Belgium
- Icosagen Cell Factory OÜ, Kambja vald, Tartumaa, Estonia
| | - Quintijn Bonnez
- Laboratory for Thrombosis Research, IRF Life Sciences, KU Leuven Campus Kulak Kortrijk, Kortrijk, Belgium
| | - Aline Vandenbulcke
- Laboratory for Thrombosis Research, IRF Life Sciences, KU Leuven Campus Kulak Kortrijk, Kortrijk, Belgium
| | - Edwige Tellier
- C2VN, INSERM, INRAE, Aix Marseille Universite, Marseille, France
| | - Gilles Kaplanski
- C2VN, INSERM, INRAE, Aix Marseille Universite, Marseille, France
- Hôpital de la Conception, Service de médecine interne, APHM, C2VN, INSERM, INRAE, Aix Marseille Universite, Marseille, France
| | - Hendrik B Feys
- Transfusion Research Center, Belgian Red Cross-Flanders, Ghent, Belgium
- Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Claudia Tersteeg
- Laboratory for Thrombosis Research, IRF Life Sciences, KU Leuven Campus Kulak Kortrijk, Kortrijk, Belgium
| | - Andres Männik
- Icosagen Cell Factory OÜ, Kambja vald, Tartumaa, Estonia
| | - Simon F De Meyer
- Laboratory for Thrombosis Research, IRF Life Sciences, KU Leuven Campus Kulak Kortrijk, Kortrijk, Belgium
| | - Karen Vanhoorelbeke
- Laboratory for Thrombosis Research, IRF Life Sciences, KU Leuven Campus Kulak Kortrijk, Kortrijk, Belgium
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Erratum. Res Pract Thromb Haemost 2021; 5:456. [PMID: 33870031 PMCID: PMC8035789 DOI: 10.1002/rth2.12490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
[This corrects the article DOI: 10.1002/rth2.12379.].
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10
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Horta S, Neumann F, Yeh SH, Langseth CM, Kangro K, Breukers J, Madaboosi N, Geukens N, Vanhoorelbeke K, Nilsson M, Lammertyn J. Evaluation of Immuno-Rolling Circle Amplification for Multiplex Detection and Profiling of Antigen-Specific Antibody Isotypes. Anal Chem 2021; 93:6169-6177. [PMID: 33823582 DOI: 10.1021/acs.analchem.1c00172] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Antibody characterization is essential for understanding the immune system and development of diagnostics and therapeutics. Current technologies are mainly focusing on the detection of antigen-specific immunoglobulin G (IgG) using bulk singleplex measurements, which lack information on other isotypes and specificity of individual antibodies. Digital immunoassays based on nucleic acid amplification have demonstrated superior performance by allowing the detection of single molecules in a multiplex and sensitive manner. In this study, we demonstrate for the first time an immuno-rolling circle amplification (immuno-RCA) assay for the multiplex detection of three antigen-specific antibody isotypes (IgG, IgA, and IgM) and its integration with microengraving. To validate this approach, we used the autoimmune disease immune-mediated thrombotic thrombocytopenic purpura (iTTP) as the model disease with anti-ADAMTS13 autoantibodies as the diagnostic target molecules. To identify the anti-ADAMTS13 autoantibody isotypes, we designed a pool of three unique antibody-oligonucleotide conjugates for identification and subsequent amplification and visualization via RCA. To validate this approach, we first confirmed an assay specificity of >88% and a low limit of detection of 0.3 ng/mL in the spiked buffer. Subsequently, we performed a dilution series of an iTTP plasma sample for the multiplex detection of the three isotypes with higher sensitivity compared to an enzyme-linked immunosorbent assay. Finally, we demonstrated single-cell analysis of human B cells and hybridoma cells for the detection of secreted antibodies using microengraving and achieved a detection of 23.3 pg/mL secreted antibodies per hour. This approach could help to improve the understanding of antibody isotype distributions and their roles in various diseases.
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Affiliation(s)
- Sara Horta
- Laboratory for Thrombosis Research, IRF Life Sciences, KU Leuven Campus Kulak Kortrijk, Etienne Sabbelaan 53, Kortrijk 8500, Belgium.,Department of Biosystems, Biosensors Group, KU Leuven, Willem De Croylaan 42, Heverlee B-3001, Belgium
| | - Felix Neumann
- Science for Life Laboratory, Department of Biochemistry and Biophysics, Stockholm University, Tomtebodavägen 23B, Solna 171 65, Sweden
| | - Shu-Hao Yeh
- Department of Biosystems, Biosensors Group, KU Leuven, Willem De Croylaan 42, Heverlee B-3001, Belgium
| | - Christoffer Mattsson Langseth
- Science for Life Laboratory, Department of Biochemistry and Biophysics, Stockholm University, Tomtebodavägen 23B, Solna 171 65, Sweden
| | - Kadri Kangro
- Laboratory for Thrombosis Research, IRF Life Sciences, KU Leuven Campus Kulak Kortrijk, Etienne Sabbelaan 53, Kortrijk 8500, Belgium.,Icosagen Cell Factory OÜ, Kambja vald, Tartumaa 61713, Estonia
| | - Jolien Breukers
- Department of Biosystems, Biosensors Group, KU Leuven, Willem De Croylaan 42, Heverlee B-3001, Belgium
| | - Narayanan Madaboosi
- Science for Life Laboratory, Department of Biochemistry and Biophysics, Stockholm University, Tomtebodavägen 23B, Solna 171 65, Sweden
| | - Nick Geukens
- PharmAbs, The KU Leuven Antibody Center, KU Leuven, Herestraat 49, Leuven 3000, Belgium
| | - Karen Vanhoorelbeke
- Laboratory for Thrombosis Research, IRF Life Sciences, KU Leuven Campus Kulak Kortrijk, Etienne Sabbelaan 53, Kortrijk 8500, Belgium
| | - Mats Nilsson
- Science for Life Laboratory, Department of Biochemistry and Biophysics, Stockholm University, Tomtebodavägen 23B, Solna 171 65, Sweden
| | - Jeroen Lammertyn
- Department of Biosystems, Biosensors Group, KU Leuven, Willem De Croylaan 42, Heverlee B-3001, Belgium
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