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Jonasdottir AD, Manojlovic M, Vojinovic J, Nordin A, Bruchfeld A, Gunnarsson I, Mobarrez F, Antovic A. Augmented thrombin formation is related to circulating levels of extracellular vesicles exposing tissue factor and citrullinated histone-3 in anti-neutrophil cytoplasmic antibody-associated vasculitides. Front Med (Lausanne) 2023; 10:1240325. [PMID: 37915326 PMCID: PMC10616855 DOI: 10.3389/fmed.2023.1240325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 09/29/2023] [Indexed: 11/03/2023] Open
Abstract
Objectives To study circulating myeloperoxidase (MPO)-positive extracellular vesicles (MPO+EVs) exposing citrullinated histone-3 (H3Cit), tissue factor (TF), and plasminogen (Plg) in association to thrombin generation in patients with anti-neutrophil cytoplasm antibody (ANCA)-associated vasculitis (AAV). Methods We have involved well-characterized patients with AAV together with population-based controls. Flow cytometry was used to assess the levels of MPO+EVs in citrated plasma. MPO+EVs were phenotyped by anti-MPO-antibodies together with anti-CD142 (anti-TF), anti-H3Cit, and anti-Plg antibodies. A modified Calibrated Automated Thrombogram (CAT) assay was utilized to measure thrombin generation in plasma initiated by EVs-enriched pellets. The activity of AAV was evaluated with the Birmingham Vasculitis Activity Score (BVAS). Results This study comprised 46 AAV patients, 23 in the active stage of the disease and 23 in remission, as well as 23 age- and sex matched population-based controls. Augmented levels of all investigated MPO+ EVs were found in active AAV patients in comparison to the subgroup of patients in remission and controls. Thrombin generation, measured by endogenous thrombin potential (ETP) and peak of thrombin formation, was higher in plasma when triggered by EVs-enriched pellet from AAV patients. ETP and peak were associated with the levels of MPO+TF+ and MPO+H3Cit+ EVs. Additionally, MPO+TF+ EVs correlated with the disease activity evaluated with BVAS. Conclusion Augmented thrombin generation is found in AAV patients regardless of disease activity and is associated with higher exposure of TF and H3Cit on MPO+EVs. This may contribute to the increased risk of thrombosis seen in AAV patients.
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Affiliation(s)
- Asta Dogg Jonasdottir
- Department of Clinical Science, Intervention and Technology, Division of Renal Medicine, Karolinska Institutet, Stockholm, Sweden
- Division of Nephrology, Department of Medicine, Landspitali – The National University Hospital, Reykjavik, Iceland
| | - Milena Manojlovic
- Department of Pediatrics, Medical Faculty, University of Niš, Niš, Serbia
| | - Jelena Vojinovic
- Department of Pediatrics, Medical Faculty, University of Niš, Niš, Serbia
| | - Annica Nordin
- Department of Medicine, Division of Rheumatology, Karolinska Institutet, Stockholm, Sweden
| | - Annette Bruchfeld
- Department of Clinical Science, Intervention and Technology, Division of Renal Medicine, Karolinska Institutet, Stockholm, Sweden
- Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden
| | - Iva Gunnarsson
- Department of Medicine, Division of Rheumatology, Karolinska Institutet, Stockholm, Sweden
- Rheumatology, Karolinska University Hospital Stockholm, Stockholm, Sweden
| | | | - Aleksandra Antovic
- Department of Medicine, Division of Rheumatology, Karolinska Institutet, Stockholm, Sweden
- Rheumatology, Karolinska University Hospital Stockholm, Stockholm, Sweden
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Liu S, Xu Q, Wang Y, Lv Y, Liu QQ. Metabolomics combined with clinical analysis explores metabolic changes and potential serum metabolite biomarkers of antineutrophil cytoplasmic antibody-associated vasculitis with renal impairment. PeerJ 2023; 11:e15051. [PMID: 36942002 PMCID: PMC10024486 DOI: 10.7717/peerj.15051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 02/21/2023] [Indexed: 03/17/2023] Open
Abstract
Background Antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV) is an autoimmune systemic disease, and the majority of AAV patients have renal involvement presenting as rapid progressive glomerulonephritis (GN). Currently, the clinically available AAV markers are limited, and some of the newly reported markers are still in the nascent stage. The particular mechanism of the level changes of various markers and their association with the pathogenesis of AAV are not well defined. With the help of metabolomics analysis, this study aims to explore metabolic changes in AAV patients with renal involvement and lay the foundation for the discovery of novel biomarkers for AAV-related kidney damage. Methods We performed liquid chromatography-tandem mass spectrometry (LC-MS/MS)-based on serum samples from patients with AAV (N = 33) and healthy controls (N = 33) in order to characterize the serum metabolic profiling. The principal component analysis (PCA) and orthogonal partial least-squares-discriminant analysis (OPLS-DA) were used to identify the differential metabolites. Least Absolute Shrinkage and Selection Operator (LASSO) and eXtreme Gradient Boosting (XGBoost) analysis were further conducted to identify the potential diagnostic biomarker. A receiver operating characteristic (ROC) curve analysis was conducted to evaluate the diagnostic performance of the identified potential biomarker. Results A total of 455 metabolites were detected by LC-MS analysis. PCA and OPLS-DA demonstrated a significant difference between AAV patients with renal involvement and healthy controls, and 135 differentially expressed metabolites were selected, with 121 upregulated and 14 downregulated. Ninety-two metabolic pathways were annotated and enriched based on the KEGG database. N-acetyl-L-leucine, Acetyl-DL-Valine, 5-hydroxyindole-3-acetic acid, and the combination of 1-methylhistidine and Asp-phe could accurately distinguish AAV patients with renal involvement from healthy controls. And 1-methylhistidine was found to be significantly associated with the progression and prognosis of AAV with renal impairment. Amino acid metabolism exhibits significant alternations in AAV with renal involvement. Conclusion This study identified metabolomic differences between AAV patients with renal involvement and non-AAV individuals. Metabolites that could accurately distinguish patients with AAV renal impairment from healthy controls in this study, and metabolites that were significantly associated with disease progression and prognosis were screened out. Overall, this study provides information on changes in metabolites and metabolic pathways for future studies of AAV-related kidney damage and lays a foundation for the exploration of new biomarkers of AAV-related kidney damage.
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Affiliation(s)
- Siyang Liu
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Qing Xu
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Yiru Wang
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Yongman Lv
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
- Department of Health Management Centre, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Qing quan Liu
- Department of Nephrology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
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Scurt FG, Bose K, Hammoud B, Brandt S, Bernhardt A, Gross C, Mertens PR, Chatzikyrkou C. Old known and possible new biomarkers of ANCA-associated vasculitis. J Autoimmun 2022; 133:102953. [PMID: 36410262 DOI: 10.1016/j.jaut.2022.102953] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 11/06/2022] [Accepted: 11/06/2022] [Indexed: 11/19/2022]
Abstract
Antineutrophil cytoplasm antibody (ANCA)-associated vasculitis (AAV) comprises a group of multisystem disorders involving severe, systemic, small-vessel vasculitis with short- and long term serious and life-threating complications. Despite the simplification of treatment, fundamental aspects concerning assessment of its efficacy and its adaptation to encountered complications or to the relapsing/remitting/subclinical disease course remain still unknown. The pathogenesis of AAV is complex and unique, and despite the progress achieved in the last years, much has not to be learnt. Foremost, there is still no accurate marker enabling us to monitoring disease and guide therapy. Therefore, the disease management relays often on clinical judgment and follows a" trial and error approach". In the recent years, an increasing number of new molecules s have been explored and used for this purpose including genomics, B- and T-cell subpopulations, complement system factors, cytokines, metabolomics, biospectroscopy and components of our microbiome. The aim of this review is to discuss both the role of known historical and clinically established biomarkers of AAV, as well as to highlight potential new ones, which could be used for timely diagnosis and monitoring of this devastating disease, with the goal to improve the effectiveness and ameliorate the complications of its demanding therapy.
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Affiliation(s)
- Florian G Scurt
- University Clinic for Nephrology and Hypertension, Diabetology and Endocrinology, University Hospital Magdeburg, Otto-von-Guericke University Magdeburg, Germany.
| | - K Bose
- Department of Gastroenterology, Hepatology and Infectious Diseases, University Hospital Magdeburg, Otto-von-Guericke University Magdeburg, Germany
| | - Ben Hammoud
- University Clinic for Nephrology and Hypertension, Diabetology and Endocrinology, University Hospital Magdeburg, Otto-von-Guericke University Magdeburg, Germany
| | - S Brandt
- University Clinic for Nephrology and Hypertension, Diabetology and Endocrinology, University Hospital Magdeburg, Otto-von-Guericke University Magdeburg, Germany
| | - A Bernhardt
- University Clinic for Nephrology and Hypertension, Diabetology and Endocrinology, University Hospital Magdeburg, Otto-von-Guericke University Magdeburg, Germany
| | - C Gross
- University Clinic for Nephrology and Hypertension, Diabetology and Endocrinology, University Hospital Magdeburg, Otto-von-Guericke University Magdeburg, Germany
| | - Peter R Mertens
- University Clinic for Nephrology and Hypertension, Diabetology and Endocrinology, University Hospital Magdeburg, Otto-von-Guericke University Magdeburg, Germany
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Ahn SS, Park YB, Lee SW. Serological Biomarkers and Indices for the Current Activity and Prognosis of ANCA-Associated Vasculitis: Experience in a Single Centre in Korea. Yonsei Med J 2021; 62:279-287. [PMID: 33779081 PMCID: PMC8007433 DOI: 10.3349/ymj.2021.62.4.279] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 01/27/2021] [Accepted: 02/02/2021] [Indexed: 11/27/2022] Open
Abstract
Small vessel vasculitis is composed of two types of vasculitis based on immune-complex deposits, immune-complex vasculitis and antineutrophil cytoplasmic antibody-associated vasculitis (AAV) according to the 2012 Chapel Hill Consensus Conferences Nomenclature of Vasculitis. In general, the current disease-states are assessed in three ways in real clinical practice such as activity, damage and functional status. Birmingham vasculitis activity score (BVAS, version 3) and five-factor score were calculated for assessing the cross-sectional activity and for predicting the prognosis of AAV, respectively. Since BVAS includes a wide spectrum of nine systemic items with differently weighted scores based on new-onset/worsening or persistent each symptom, it has been considered as the most reliable tool to assess AAV activity to date. However, since BVAS represents both cross-sectional and chronic clinical features, it has a limitation in flexibly reflecting the cross-sectional activity or severity of AAV. In addition, the heterogeneous items of BVAS are difficult to reflect the close correlation between BVAS and AAV pathogenesis. It is practically difficult to discover new biomarkers or indices that exceed the reliability of AAV-specific indices or acute-phase reactants established by long clinical experience. However, efforts to discover and develop new biomarkers or indices are expected to complement the clinical unmet need of existing AAV-specific indices and acute-phase reactants. In this review, we reviewed the serological biomarkers and indices that have been reported to date and introduced studies that investigated serological biomarkers and indices in Korean patients with AAV.
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Affiliation(s)
- Sung Soo Ahn
- Division of Rheumatology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Yong Beom Park
- Division of Rheumatology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
- Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul, Korea
| | - Sang Won Lee
- Division of Rheumatology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
- Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul, Korea.
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5
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Kyurkchiev D, Yoneva T, Yordanova A, Kurteva E, Vasilev G, Zdravkova Y, Sheytanov I, Rashkov R, Ivanova-Todorova E. Alterations of serum levels of plasminogen, TNF-α, and IDO in granulomatosis with polyangiitis patients. Vascular 2021; 29:874-882. [PMID: 33427113 DOI: 10.1177/1708538120986305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
BACKGROUND Granulomatosis with polyangiitis (GPA) is a representative of vasculitides associated with anti-neutrophil cytoplasmic autoantibodies. "Classical" antibodies directed against proteinase 3 are involved in the pathogenesis and are part of the GPA diagnosis at the same time. Along with them, however, antibodies against Lysosomal-Associated Membrane Protein-2 (LAMP-2) and antibodies directed against plasminogen have been described in GPA.Objectives and methodology: We performed a cross-sectional study enrolling 34 patients diagnosed with GPA. Our study was aimed at looking for correlations between serum levels of LAMP-2 and plasminogen and the clinical manifestations of the GPA. Furthermore, we examined serum levels of tumor necrosis factor-alpha (TNF-α) and its associated indoleamine-pyrrole 2,3-dioxygenase (IDO), as well as we looked for a correlation between these cytokines and the clinical manifestations of GPA. RESULTS The results showed that in GPA, serum plasminogen levels were negatively associated with renal involvement (receiver operating characteristic (ROC) area under the curve (AUC) of 0.78) (95% CI 0.53-0.91), p = 0.035, and the extent of proteinuria, Spearman's Rho = -0.4, p = 0.015. Increased levels of TNF-α and IDO correlated with disease activity, Spearman's Rho =0.62, p = 0.001 and Spearman's Rho = 0.4, p = 0.022, respectively, whereas only TNF-α was increased in severe forms of GPA with lung involvement (ROC AUC of 0.8) (95% CI 0.66-0.94), p = 0.005. CONCLUSIONS In this study, we demonstrate the alteration of soluble factors, which play an important role in the pathogenesis of GPA and their relationship with the clinical manifestations of the disease. Our main results confirm the associations of increased secretory TNF-α and some clinical manifestations, and we describe for the first time decreased serum plasminogen levels and their association with renal involvement.
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Affiliation(s)
- Dobroslav Kyurkchiev
- Laboratory of Clinical immunology, University Hospital St. Ivan Rilski, Department of Clinical Immunology, Medical Faculty, Medical University of Sofia, Sofia, Bulgaria
| | - Tsvetelina Yoneva
- Department of Rheumatology, Clinic of Rheumatology, University Hospital St. Ivan Rilski, Medical Faculty, Medical University of Sofia, Sofia, Bulgaria
| | - Adelina Yordanova
- Laboratory of Clinical immunology, University Hospital St. Ivan Rilski, Department of Clinical Immunology, Medical Faculty, Medical University of Sofia, Sofia, Bulgaria
| | - Ekaterina Kurteva
- Laboratory of Clinical immunology, University Hospital St. Ivan Rilski, Department of Clinical Immunology, Medical Faculty, Medical University of Sofia, Sofia, Bulgaria
| | - Georgi Vasilev
- Laboratory of Clinical immunology, University Hospital St. Ivan Rilski, Department of Clinical Immunology, Medical Faculty, Medical University of Sofia, Sofia, Bulgaria
| | - Yana Zdravkova
- Department of Rheumatology, Clinic of Rheumatology, University Hospital St. Ivan Rilski, Medical Faculty, Medical University of Sofia, Sofia, Bulgaria
| | - Ivan Sheytanov
- Department of Rheumatology, Clinic of Rheumatology, University Hospital St. Ivan Rilski, Medical Faculty, Medical University of Sofia, Sofia, Bulgaria
| | - Rasho Rashkov
- Department of Rheumatology, Clinic of Rheumatology, University Hospital St. Ivan Rilski, Medical Faculty, Medical University of Sofia, Sofia, Bulgaria
| | - Ekaterina Ivanova-Todorova
- Laboratory of Clinical immunology, University Hospital St. Ivan Rilski, Department of Clinical Immunology, Medical Faculty, Medical University of Sofia, Sofia, Bulgaria
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Claudel SE, Tucker BM, Kleven DT, Pirkle JL, Murea M. Narrative Review of Hypercoagulability in Small-Vessel Vasculitis. Kidney Int Rep 2020; 5:586-599. [PMID: 32405580 PMCID: PMC7210611 DOI: 10.1016/j.ekir.2019.12.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 12/03/2019] [Accepted: 12/31/2019] [Indexed: 01/08/2023] Open
Abstract
Pauci-immune necrotizing and crescentic glomerulonephritis (GN) is the most common etiology of rapidly progressive GN. Clinical presentation in those afflicted is usually related to rapid loss of kidney function. We report the case of a 70-year-old woman who came to medical attention for signs and symptoms related to lower-extremity deep vein thrombosis (DVT). At presentation, the patient had biochemical abnormalities consistent with active GN, which quickly progressed to rapid loss in kidney function requiring renal replacement therapy. Kidney biopsy revealed small-vessel vasculitis with glomerular crescents. Serologic studies were negative for antineutrophil cytoplasmic antibody antibodies and other causes of acute GN. Plasmapheresis, immunosuppressive, and anticoagulant therapies were prescribed. Absence of other apparent end-organ involvement with vasculitis pointed toward renal-limited small-vessel vasculitis, yet presence of unprovoked DVT argues for systemic vascular inflammation. This case illustrates that venous thrombosis can be the presenting manifestation in patients with vasculitis and silent, severe end-organ involvement. The epidemiology and pathophysiology of venous thromboembolism in small-vessel vasculitis are discussed in this report.
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Affiliation(s)
| | - Bryan M. Tucker
- Department of Internal Medicine, Section of Nephrology, Baylor College of Medicine, Houston, Texas, USA
| | - Daniel T. Kleven
- Department of Pathology, Wake Forest School of Medicine, Winston Salem, North Carolina, USA
| | - James L. Pirkle
- Department of Internal Medicine, Section on Nephrology, Wake Forest School of Medicine, Winston Salem, North Carolina, USA
| | - Mariana Murea
- Department of Internal Medicine, Section on Nephrology, Wake Forest School of Medicine, Winston Salem, North Carolina, USA
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7
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Tran TTT, Hara A, Kitagawa K, Kitajima S, Toyama T, Iwata Y, Sakai N, Shimizu M, Kaneko S, Furuichi K, Wada T. Relationship between autoantibodies to erythropoietin receptor and renal outcome in patients with anti-neutrophil cytoplasmic antibody-associated vasculitis. Biomarkers 2020; 25:194-200. [PMID: 32024392 DOI: 10.1080/1354750x.2020.1727014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Purpose: We examined the relationship between autoantibodies to erythropoietin receptor (EPOR) and renal outcome in patients with anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV).Materials and methods: Sixty-three Japanese patients with AAV were enrolled and followed for a median of 31.4 months. Patients were screened for serum anti-EPOR antibodies using an enzyme-linked immunosorbent assay. Associations of anti-EPOR antibodies with clinical parameters were analyzed using logistic-regression models.Results: Anti-EPOR antibodies were detected in 7 (11%) of the 63 patients, and levels of the antibodies decreased with immunosuppressive therapy. The presence of anti-EPOR antibodies was associated with a higher Birmingham vasculitis activity score. In addition, anti-EPOR antibodies were more frequently observed in patients with renal outcomes, which was defined as a sustained 50% reduction in the estimated glomerular filtration rate from baseline, than in those without. Multiple logistic regression analysis revealed that presence of anti-EPOR antibodies, as well as age at disease onset, were as risk factors for the renal outcome.Conclusion: Anti-EPOR antibodies were associated with the progression of renal dysfunction in patients with AAV.
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Affiliation(s)
- Trang Thi Thu Tran
- Department of Nephrology and Laboratory Medicine, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Akinori Hara
- Division of Nephrology, Kanazawa University Hospital, Kanazawa, Japan.,Department of Environmental and Preventive Medicine, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Kiyoki Kitagawa
- Division of Nephrology, National Hospital Organization Kanazawa Medical Center, Kanazawa, Japan
| | - Shinji Kitajima
- Division of Nephrology, Kanazawa University Hospital, Kanazawa, Japan
| | - Tadashi Toyama
- Division of Nephrology, Kanazawa University Hospital, Kanazawa, Japan
| | - Yasunori Iwata
- Division of Nephrology, Kanazawa University Hospital, Kanazawa, Japan
| | - Norihiko Sakai
- Division of Nephrology, Kanazawa University Hospital, Kanazawa, Japan
| | - Miho Shimizu
- Division of Nephrology, Kanazawa University Hospital, Kanazawa, Japan
| | - Shuichi Kaneko
- Department of Disease Control and Homeostasis, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Kengo Furuichi
- Division of Nephrology, Kanazawa University Hospital, Kanazawa, Japan
| | - Takashi Wada
- Department of Nephrology and Laboratory Medicine, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan.,Division of Nephrology, Kanazawa University Hospital, Kanazawa, Japan
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8
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Mendoza CE, Brant EJ, McDermott ML, Froment A, Hu Y, Hogan SL, Jennette JC, Falk RJ, Nachman PH, Derebail VK, Bunch DO. Elevated Microparticle Tissue Factor Activity Differentiates Patients With Venous Thromboembolism in Anti-neutrophil Cytoplasmic Autoantibody Vasculitis. Kidney Int Rep 2019; 4:1617-1629. [PMID: 31891003 PMCID: PMC6933462 DOI: 10.1016/j.ekir.2019.07.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 06/18/2019] [Accepted: 07/08/2019] [Indexed: 01/12/2023] Open
Abstract
Introduction Venous thromboembolism (VTE) is a life-threatening complication of anti-neutrophil cytoplasmic autoantibody (ANCA) vasculitis whose mechanism remains incompletely elucidated. We tested the hypothesis that elevated microparticle tissue factor activity (MPTFa) or anti-plasminogen antibodies (anti-Plg) may identify patients at risk for VTE. Methods In this prospective study, patients were enrolled during active disease and followed longitudinally. Twelve patients who experienced a VTE (VTEpos) were compared with patients without VTE (VTEneg, n = 29) and healthy controls (HC, n = 70). MPTFa, anti-Plg, interleukin-6, high-sensitivity C-reactive protein (hs-CRP), D-dimer, serum creatinine, and serum albumin were assessed. Fisher’s exact tests and Wilcoxon tests compared categorical and continuous variables, respectively. Cox regression for time to VTE or last follow-up was performed. Results VTEpos patients had higher MPTFa (peak median = 14.0, interquartile range = 4.3–36.6) than HC (0, 0–3.5) and VTEneg patients (0, 0–1.4). In time-to-event analysis, MPTFa was associated with VTE when measured during both active disease (hazard ratio [HR]; 95% confidence interval [CI]: 1.04; 1.01–1.08) and remission (1.4; 1.11–1.77). Anti-Plg during remission was also associated with VTE (1.17; 1.03–1.33). Each g/dl decrease of serum albumin was associated with a 4-fold increase in VTE risk (4.4; 1.5–12.9). Adjusting for estimated glomerular filtration rate (eGFR), anti-Plg during remission remained significantly associated with VTE. Conclusion Elevated MPTFa and increased anti-Plg in remission are strong indicators of VTE independent of renal function. Association of anti-Plg during remission with VTE implies hypercoagulability even during disease quiescence. Hypoalbuminemia strongly portends VTE risk, which is a novel finding in ANCA vasculitis. A thrombotic signature would allow improved management of patients to minimize VTE risk and complications of anticoagulation.
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Affiliation(s)
- Carmen E Mendoza
- Department of Medicine, Division of Nephrology, UNC Kidney Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Elizabeth J Brant
- Department of Medicine, Division of Nephrology, UNC Kidney Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Matthew L McDermott
- Department of Medicine, Division of Nephrology, UNC Kidney Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Anne Froment
- Department of Medicine, Division of Nephrology, UNC Kidney Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Yichun Hu
- Department of Medicine, Division of Nephrology, UNC Kidney Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Susan L Hogan
- Department of Medicine, Division of Nephrology, UNC Kidney Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | - J Charles Jennette
- Department of Medicine, Division of Nephrology, UNC Kidney Center, University of North Carolina, Chapel Hill, North Carolina, USA.,Department of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Ronald J Falk
- Department of Medicine, Division of Nephrology, UNC Kidney Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Patrick H Nachman
- Department of Medicine, Division of Nephrology, UNC Kidney Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Vimal K Derebail
- Department of Medicine, Division of Nephrology, UNC Kidney Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Donna O'Dell Bunch
- Department of Medicine, Division of Nephrology, UNC Kidney Center, University of North Carolina, Chapel Hill, North Carolina, USA
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Anti-plasminogen antibodies in ANCA-associated vasculitis: An optimized anti-plasminogen assay. PLoS One 2018; 13:e0207064. [PMID: 30419041 PMCID: PMC6231631 DOI: 10.1371/journal.pone.0207064] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 10/24/2018] [Indexed: 12/05/2022] Open
Abstract
Anti-plasminogen antibodies (α-PLG) were previously detected in a subpopulation of anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV) patients, showing a relation to renal lesions and outcome. Several studies showed different proportions of α-PLG positive AAV patients, possibly due to differences in the assays used. We here present a new, optimized α-PLG Enzyme-Linked Immuno Sorbent Assay (ELISA) and validate the presence of α-PLG in AAV. Different ELISA set-ups were tested regarding plasminogen (PLG) antigen, concentrations, coating buffers, blocking agents, and environmental conditions. Purified lysine-PLG (lys-PLG) showed better differentiation between positive samples and negative samples than glutamic acid-PLG (glu-PLG). Therefore, lys-PLG was used as coating antigen. With the optimized α-PLG ELISA we found α-PLG in 14.3% of the myeloperoxidase (MPO)-ANCA patients, whereas all our proteinase-3 (PR3)-ANCA patients tested in our new assay were negative. Concluding, in this study we have combined important technical findings and methods from previous studies to optimize the α-PLG assay, which can be used for future research purposes and will aid in uniform reporting of α-PLG status of patients.
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Carmona FD, Vaglio A, Mackie SL, Hernández-Rodríguez J, Monach PA, Castañeda S, Solans R, Morado IC, Narváez J, Ramentol-Sintas M, Pease CT, Dasgupta B, Watts R, Khalidi N, Langford CA, Ytterberg S, Boiardi L, Beretta L, Govoni M, Emmi G, Bonatti F, Cimmino MA, Witte T, Neumann T, Holle J, Schönau V, Sailler L, Papo T, Haroche J, Mahr A, Mouthon L, Molberg Ø, Diamantopoulos AP, Voskuyl A, Brouwer E, Daikeler T, Berger CT, Molloy ES, O’Neill L, Blockmans D, Lie BA, Mclaren P, Vyse TJ, Wijmenga C, Allanore Y, Koeleman BP, Barrett JH, Cid MC, Salvarani C, Merkel PA, Morgan AW, González-Gay MA, Martín J, Callejas JL, Caminal-Montero L, Corbera-Bellalta M, de Miguel E, López JBD, García-Villanueva MJ, Gómez-Vaquero C, Guijarro-Rojas M, Hidalgo-Conde A, Marí-Alfonso B, Berriochoa AM, Zapico AM, Martínez-Taboada VM, Miranda-Filloy JA, Monfort J, Ortego-Centeno N, Pérez-Conesa M, Prieto-González S, Raya E, Fernández RR, Sánchez-Martín J, Sopeña B, Tío L, Unzurrunzaga A, Gough A, Isaacs JD, Green M, McHugh N, Hordon L, Kamath S, Nisar M, Patel Y, Yee CS, Stevens R, Nandi P, Nandagudi A, Jarrett S, Li C, Levy S, Mollan S, Salih A, Wordsworth O, Sanders E, Roads E, Gill A, Carr L, Routledge C, Culfear K, Nugaliyadde A, James L, Spimpolo J, Kempa A, Mackenzie F, Fong R, Peters G, Rowbotham B, Masqood Z, Hollywood J, Gondo P, Wood R, Martin S, Rashid LH, Robinson JI, Morgan M, Sorensen L, Taylor J, Carette S, Chung S, Cuthbertson D, Forbess LJ, Gewurz-Singer O, Hoffman GS, Koening CL, Maksimowicz-McKinnon KM, McAlear CA, Moreland LW, Pagnoux C, Seo P, Specks U, Spiera RF, Sreih A, Warrington KJ, Weisman M. A Genome-wide Association Study Identifies Risk Alleles in Plasminogen and P4HA2 Associated with Giant Cell Arteritis. Am J Hum Genet 2017; 100:64-74. [PMID: 28041642 DOI: 10.1016/j.ajhg.2016.11.013] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 11/18/2016] [Indexed: 02/07/2023] Open
Abstract
Giant cell arteritis (GCA) is the most common form of vasculitis in individuals older than 50 years in Western countries. To shed light onto the genetic background influencing susceptibility for GCA, we performed a genome-wide association screening in a well-powered study cohort. After imputation, 1,844,133 genetic variants were analyzed in 2,134 case subjects and 9,125 unaffected individuals from ten independent populations of European ancestry. Our data confirmed HLA class II as the strongest associated region (independent signals: rs9268905, p = 1.94 × 10-54, per-allele OR = 1.79; and rs9275592, p = 1.14 × 10-40, OR = 2.08). Additionally, PLG and P4HA2 were identified as GCA risk genes at the genome-wide level of significance (rs4252134, p = 1.23 × 10-10, OR = 1.28; and rs128738, p = 4.60 × 10-9, OR = 1.32, respectively). Interestingly, we observed that the association peaks overlapped with different regulatory elements related to cell types and tissues involved in the pathophysiology of GCA. PLG and P4HA2 are involved in vascular remodelling and angiogenesis, suggesting a high relevance of these processes for the pathogenic mechanisms underlying this type of vasculitis.
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Draibe JB, Fulladosa X, Cruzado JM, Torras J, Salama AD. Current and novel biomarkers in anti-neutrophil cytoplasm-associated vasculitis. Clin Kidney J 2016; 9:547-51. [PMID: 27478594 PMCID: PMC4957731 DOI: 10.1093/ckj/sfw056] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Accepted: 05/31/2016] [Indexed: 12/15/2022] Open
Abstract
Anti-neutrophil cytoplasm antibody (ANCA)-associated vasculitis (AAV) is characterized by a variable disease course, with up to 50% of patients having one relapse within 5 years and many progressing to end-stage organ damage despite modern treatment strategies. Moreover, complications arising from treatment dominate the causes of mortality and morbidity both early and late during disease, especially in the elderly and those with severe renal involvement, and there is additional uncertainty as to how long treatment should be continued. There is, therefore, an urgent clinical need to identify robust biomarkers to better predict treatment responses, risk of disease relapse and eventual complete clinical and immunological quiescence. To date, no such biomarkers exist, but better understanding of disease pathogenesis and the underlying immune dysfunction has provided some potential candidates linked to the discovery of new antibodies, different leukocyte activation states, the role of the alternative complement pathway and markers of vascular activation. With all promising new biomarkers, there is the need to rapidly replicate and validate early findings using large biobanks of samples that could be brought together by leaders in the field.
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Affiliation(s)
| | - Xavier Fulladosa
- Nephrology Department , Hospital Universitari de Bellvitge , Barcelona , Spain
| | - Josep Maria Cruzado
- Nephrology Department , Hospital Universitari de Bellvitge , Barcelona , Spain
| | - Joan Torras
- Nephrology Department , Hospital Universitari de Bellvitge , Barcelona , Spain
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Li ZY, Ma TT, Chen M, Zhao MH. The Prevalence and Management of Anti-Neutrophil Cytoplasmic Antibody-Associated Vasculitis in China. KIDNEY DISEASES (BASEL, SWITZERLAND) 2016; 1:216-23. [PMID: 27536681 PMCID: PMC4934806 DOI: 10.1159/000441912] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Accepted: 10/18/2015] [Indexed: 11/19/2022]
Abstract
BACKGROUND Anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV) comprises microscopic polyangiitis (MPA), granulomatosis with polyangiitis (GPA) and eosinophilic GPA (EGPA). Myeloperoxidase (MPO) and proteinase 3 (PR3) are the main antigens for ANCA. AAV is a common multisystem autoimmune disease and most of the studies on AAV have been conducted in Western countries. Nowadays in China many efforts are made to investigate this disease. SUMMARY This review highlights the progress in the prevalence, management and outcomes of AAV in Chinese patients. With respect to the prevalence of AAV, though there are no precise data, AAV is not rare in the Chinese population. In Chinese patients with AAV there is a striking preponderance of MPA, and MPO-ANCA is much more common than PR3-ANCA. Even in patients with GPA there is a predominance of MPO-ANCA over PR3-ANCA. Propylthiouracil-induced AAV and ANCA-negative pauci-immune glomerulonephritis are stated in this review as well. With respect to the management of AAV, glucocorticoids in combination with cyclophosphamide remain the mainstay of induction therapy. Besides, we describe predictors of different outcomes in Chinese patients, including mortality, relapse, treatment resistance and end-stage renal disease. KEY MESSAGES AAV is not rare in the Chinese population. The disease spectrum and subtypes of ANCA are different between patients with AAV in China and Western countries. The treatment strategy for AAV in China is in consistency with that in Western countries. Predictors of different clinical outcomes are provided. FACTS FROM EAST AND WEST Treatment options for AAV are shared between the East and West, with corticosteroid combined with cyclophosphamide being the standard regimen for inductive therapy and switching to azathioprine after remission. The major cause of death in treated patients is infection related to immunosuppressive therapy within the first year after diagnosis, and this rate might be higher in China than in Western countries. Western studies demonstrated the efficacy and safety of rituximab for induction of remission in cases with relatively mild disease and maintenance therapy, but this agent is rarely used in China.
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Affiliation(s)
- Zhi-Ying Li
- Renal Division, Department of Medicine, Peking University First Hospital, Beijing, China
- Peking University Institute of Nephrology, Beijing, China
- Peking-Tsinghua Center for Life Sciences, Beijing, China
- Key Laboratory of Renal Disease, Ministry of Health of China, Beijing, China
- Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing, China
| | - Tian-Tian Ma
- Renal Division, Department of Medicine, Peking University First Hospital, Beijing, China
- Peking University Institute of Nephrology, Beijing, China
- Peking-Tsinghua Center for Life Sciences, Beijing, China
- Key Laboratory of Renal Disease, Ministry of Health of China, Beijing, China
- Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing, China
| | - Min Chen
- Renal Division, Department of Medicine, Peking University First Hospital, Beijing, China
- Peking University Institute of Nephrology, Beijing, China
- Peking-Tsinghua Center for Life Sciences, Beijing, China
- Key Laboratory of Renal Disease, Ministry of Health of China, Beijing, China
- Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing, China
| | - Ming-Hui Zhao
- Renal Division, Department of Medicine, Peking University First Hospital, Beijing, China
- Peking University Institute of Nephrology, Beijing, China
- Peking-Tsinghua Center for Life Sciences, Beijing, China
- Key Laboratory of Renal Disease, Ministry of Health of China, Beijing, China
- Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing, China
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Pauci-Immune Crescentic Glomerulonephritis: An ANCA-Associated Vasculitis. BIOMED RESEARCH INTERNATIONAL 2015; 2015:402826. [PMID: 26688808 PMCID: PMC4673333 DOI: 10.1155/2015/402826] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 11/15/2015] [Accepted: 11/17/2015] [Indexed: 01/18/2023]
Abstract
Rapidly progressive glomerulonephritis (RPGN) is a syndrome signified by a precipitous loss of renal function, with features of glomerulonephritis including dysmorphic erythrocyturia and glomerular proteinuria. RPGN is associated with extensive crescent formation, and, thus, the clinical term RPGN is often used interchangeably with the pathologic term crescentic glomerulonephritis (CGN). From an immunopathologic standpoint, primary RPGN is divided into pauci-immune GN (PICG), anti-GBM GN, and immune complex GN. PICG, the most common etiology of primary RPGN, refers to a necrotizing glomerulonephritis with few or no immune deposits by immunofluorescence (IF) or electron microscopy (EM). In most patients, pauci-immune CGN is a component of a systemic small vessel vasculitis such as granulomatosis with polyangiitis (GPA). Approximately 90% of patients with PICG have circulating ANCA antibodies, leading to the nomenclature ANCA-associated vasculitis (AAV). Recent research has identified several other antibodies associated with PICG, which is now understood to be a complex spectrum of disease with considerable overlap in terms of clinical phenotype and outcomes. In addition, several genetic and environmental factors have recently been implicated in the pathogenesis of this disorder. With new prognostic classifications, enhanced understanding of immunopathologic mechanisms, and novel treatment paradigms, clinical and experimental interest in PICG remains high.
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Rowaiye OO, Kusztal M, Klinger M. The kidneys and ANCA-associated vasculitis: from pathogenesis to diagnosis. Clin Kidney J 2015; 8:343-50. [PMID: 26034600 PMCID: PMC4440467 DOI: 10.1093/ckj/sfv020] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2014] [Accepted: 03/05/2015] [Indexed: 12/20/2022] Open
Abstract
Antineutrophil cytoplasmic antibody (ANCA)-associated vasculitides (AAV) are a group of pauci-immune small vessel vasculitides that often affect the kidneys manifesting as rapidly progressive glomerulonephritis. Although the exact pathogenesis of AAV is not fully known, evidence from in vitro, in vivo and clinical studies all point to the involvement of ANCA in the pathogenesis of AAV. In this review, we highlight the contributory roles played by various factors (e.g. genetics, environment, B and T-regulatory cells, toll-like receptors, etc.) in the pathogenesis of AAV. Furthermore, we discuss renal involvement in AAV in terms of clinical features and the various histopathological classification patterns, which are also known to be of prognostic importance. We also present information on useful imaging techniques for localizing kidney and other organ system involvement in AAV, and also on novel laboratory methods and assays useful for rapid and more specific determination of patients' ANCA status. Finally, we demonstrate evidence on novel serum biomarkers that have been shown to correlate with disease activity in AAV.
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Affiliation(s)
| | - Mariusz Kusztal
- Department of Nephrology and Transplantation Medicine , Wroclaw Medical University , Wroclaw , Poland
| | - Marian Klinger
- Department of Nephrology and Transplantation Medicine , Wroclaw Medical University , Wroclaw , Poland
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