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Gong Y, Shen C, Meng T, Lin W, Hu X, Tang R, Xiong Q, Ooi JD, Eggenhuizen PJ, Chen J, Zhou YO, Luo H, Xu J, Liu N, Xiao P, Xiao X, Zhong Y. Clinical features and prognosis of ANCA-associated vasculitis patients who were double-seropositive for myeloperoxidase-ANCA and proteinase 3-ANCA. Clin Exp Med 2024; 24:66. [PMID: 38564029 PMCID: PMC10987344 DOI: 10.1007/s10238-024-01318-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Accepted: 02/29/2024] [Indexed: 04/04/2024]
Abstract
Anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV) patients with dual positivity for proteinase 3-ANCA (PR3-ANCA) and myeloperoxidase-ANCA (MPO-ANCA) are uncommon. We aimed to investigate these idiopathic double-positive AAV patients' clinical features, histological characteristics, and prognosis. We reviewed all the electronic medical records of patients diagnosed with AAV to obtain clinical data and renal histological information from January 2010 to December 2020 in a large center in China. Patients were assigned to the MPO-AAV group or PR3-AAV group or idiopathic double-positive AAV group by ANCA specificity. We explored features of idiopathic double-positive AAV. Of the 340 patients who fulfilled the study inclusion criteria, 159 (46.76%) were female, with a mean age of 58.41 years at the time of AAV diagnosis. Similar to MPO-AAV, idiopathic double-positive AAV patients were older and had more severe anemia, lower Birmingham Vasculitis Activity Score (BVAS) and C-reactive protein (CRP) levels, less ear, nose, and throat (ENT) involvement, higher initial serum creatinine and a lower estimated glomerular filtration rate (eGFR) when compared with PR3-AAV (P < 0.05). The proportion of normal glomeruli of idiopathic double-positive AAV was the lowest among the three groups (P < 0.05). The idiopathic double-positive AAV patients had the worst remission rate (58.8%) among the three groups (P < 0.05). The relapse rate of double-positive AAV (40.0%) was comparable with PR3-AAV (44.8%) (P > 0.05). Although there was a trend toward a higher relapse rate of idiopathic double-positive AAV (40.0%) compared with MPO-AAV (23.5%), this did not reach statistical significance (P > 0.05). The proportion of patients who progressed to ESRD was 47.1% and 44.4% in the idiopathic double-positive AAV group and MPO-AAV group respectively, without statistical significance. Long-term patient survival also varied among the three groups (P < 0.05). Idiopathic double-positive AAV is a rare clinical entity with hybrid features of MPO-AAV and PR3-AAV. MPO-AAV is the "dominant" phenotype in idiopathic double-positive AAV.
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Affiliation(s)
- Yizi Gong
- Department of Nephrology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan Province, China
- Key Laboratory of Biological, Nanotechnology of National Health Commission, Xiangya Hospital, Central South University, Changsha, Hunan, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Chanjuan Shen
- Department of Hematology, The Affiliated Zhuzhou Hospital of Xiangya Medical College, Central South University, Zhuzhou, China
| | - Ting Meng
- Department of Nephrology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan Province, China
| | - Wei Lin
- Department of Pathology, Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Xueling Hu
- Department of Nephrology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan Province, China
| | - Rong Tang
- Department of Nephrology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan Province, China
| | - Qi Xiong
- Department of Nephrology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan Province, China
| | - Joshua D Ooi
- Department of Nephrology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan Province, China
- Centre for Inflammatory Diseases, Department of Medicine, School of Clinical Sciences, Monash University, Clayton, VIC, Australia
| | - Peter J Eggenhuizen
- Centre for Inflammatory Diseases, Department of Medicine, School of Clinical Sciences, Monash University, Clayton, VIC, Australia
| | - Jinbiao Chen
- Department of Medical Records and Information, Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Ya-Ou Zhou
- Department of Rheumatology and Immunology, Xiangya Hospital, Central South University, Changsha, China
| | - Hui Luo
- Department of Rheumatology and Immunology, Xiangya Hospital, Central South University, Changsha, China
| | - Jia Xu
- Department of Nephrology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan Province, China
| | - Ning Liu
- Department of Nephrology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan Province, China
| | - Ping Xiao
- Department of Nephrology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan Province, China
| | - Xiangcheng Xiao
- Department of Nephrology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan Province, China.
- Key Laboratory of Biological, Nanotechnology of National Health Commission, Xiangya Hospital, Central South University, Changsha, Hunan, China.
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China.
| | - Yong Zhong
- Department of Nephrology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan Province, China.
- Key Laboratory of Biological, Nanotechnology of National Health Commission, Xiangya Hospital, Central South University, Changsha, Hunan, China.
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China.
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Ren W, Sun J, Zhang L, He W, Guo Z, Bian Q. Significance of the total renal chronicity score in predicting renal outcome in PLA2R-associated membranous nephropathy. J Nephrol 2024:10.1007/s40620-024-01893-z. [PMID: 38512370 DOI: 10.1007/s40620-024-01893-z] [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: 07/09/2023] [Accepted: 01/07/2024] [Indexed: 03/23/2024]
Abstract
BACKGROUND Phospholipase A2 receptor (PLA2R)-associated membranous nephropathy accounts for the majority of membranous nephropathy; however, few studies have determined the prognostic impact and clinical application of renal pathologic change on this disease. METHODS A retrospective cohort study of 262 patients with PLA2R-associated membranous nephropathy was conducted. The total renal chronicity score calculated according to the degree of glomerulosclerosis, interstitial fibrosis, tubular atrophy, and arteriosclerosis was applied to evaluate renal chronicity. Baseline bias was adjusted by inverse probability weight when assessing the prognostic impact of chronicity, and multiple parameters were used to evaluate the application value of renal chronicity. RESULTS During a median follow-up of 24.5 months, renal outcome (kidney function deterioration and/or end-stage kidney disease) was observed in 22 (8.40%) patients. Not only did a higher total renal chronicity score independently predict renal outcome [odds ratio (OR): 1.562, 95% confidence interval (CI) 1.073-2.273, P = 0.020], but non-minimal chronicity was also an independent risk factor for renal outcome (OR: 3.170, 95% CI 1.040-9.659, P = 0.042). Moreover, the membranous nephropathy risk classification in the Kidney Disease: Improving Global Outcomes (KDIGO) guideline integrated with non-minimal chronicity showed improvements in categorical net reclassification (0.174, 95% CI 0.012-0.335, P = 0.035), continuous net reclassification (0.462, 95% CI 0.087-0.838, P = 0.016), and integrated discrimination (0.019, 95% CI 0.003-0.035, P = 0.020) compared to the original classification. CONCLUSIONS Renal chronicity is closely associated with renal outcomes in PLA2R-associated membranous nephropathy, and combining the KDIGO risk classification with chronicity scores may provide a more accurate prognostic prediction.
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Affiliation(s)
- Weifu Ren
- Department of Nephrology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Jing Sun
- Department of Nephrology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Lingyan Zhang
- Department of Nephrology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Wei He
- Department of Nephrology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Zhiyong Guo
- Department of Nephrology, Changhai Hospital, Naval Medical University, Shanghai, China.
| | - Qi Bian
- Department of Nephrology, Changhai Hospital, Naval Medical University, Shanghai, China.
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Boud'hors C, Riou J, Fage N, Samoreau C, Desouche A, Gatault P, Bridoux F, Martin C, Wacrenier S, Vinatier E, Djema A, Henry N, Croué A, Piccoli GB, Copin MC, Augusto JF, Brilland B. Adding 6-month parameters for the prediction of kidney prognosis in ANCA-associated glomerulonephritis. Clin Kidney J 2023; 16:2530-2541. [PMID: 38046032 PMCID: PMC10689158 DOI: 10.1093/ckj/sfad157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Indexed: 12/05/2023] Open
Abstract
Background Antineutrophil-cytoplasmic antibody (ANCA)-associated vasculitis (AAV) with kidney involvement (AAV-GN) frequently evolves to end-stage kidney disease (ESKD) despite aggressive immunosuppressive treatment. Several risk scores have been used to assess renal prognosis. We aimed to determine whether kidney function and markers of AAV-GN activity after 6 months could improve the prediction of ESKD. Methods This retrospective and observational study included adult patients with AAV-GN recruited from six French nephrology centers (including from the Maine-Anjou AAV registry). The primary outcome was kidney survival. Analyses were conducted in the whole population and in a sub-population that did not develop ESKD early in the course of the disease. Results When considering the 102 patients with all data available at diagnosis, Berden classification and Renal Risk Score (RRS) were not found to be better than kidney function [estimated glomerular filtration rate (eGFR)] alone at predicting ESKD (C-index = 0.70, 0.79, 0.82, respectively). Multivariables models did not indicate an improved prognostic value when compared with eGFR alone.When considering the 93 patients with all data available at 6 months, eGFR outperformed Berden classification and RRS (C-index = 0.88, 0.62, 0.69, respectively) to predict ESKD. RRS performed better when it was updated with the eGFR at 6 months instead of the baseline eGFR. While 6-month proteinuria was associated with ESKD and improved ESKD prediction, hematuria and serological remission did not. Conclusion This work suggests the benefit of the reassessment of the kidney prognosis 6 months after AAV-GN diagnosis. Kidney function at this time remains the most reliable for predicting kidney outcome. Of the markers tested, persistent proteinuria at 6 months was the only one to slightly improve the prediction of ESKD.
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Affiliation(s)
- Charlotte Boud'hors
- Service de Néphrologie-Dialyse-Transplantation, CHU d'Angers, Angers, France
| | - Jérémie Riou
- Département de Méthodologie et Biostatistiques, Délégation pour la Recherche Clinique et l'Innovation, CHU d'Angers, Angers, France
| | - Nicolas Fage
- Service de Néphrologie-Dialyse-Transplantation, CHU d'Angers, Angers, France
| | - Clément Samoreau
- Service de Néphrologie-Dialyse-Transplantation, CHU d'Angers, Angers, France
| | - Alice Desouche
- Service de Néphrologie-Dialyse-Transplantation, CHU d'Angers, Angers, France
| | - Philippe Gatault
- Service de Néphrologie-Dialyse-Transplantation, CHU de Tours, Tours, France
| | - Frank Bridoux
- Service de Néphrologie-Dialyse-Transplantation, CHU de Poitiers, Poitiers, France
| | - Cécile Martin
- Service de Néphrologie-Dialyse-Transplantation, CHU de Poitiers, Poitiers, France
| | - Samuel Wacrenier
- Service de Néphrologie-Dialyse, Centre Hospitalier du Mans, Le Mans, France
| | - Emeline Vinatier
- Laboratoire d'Immunologie et Allergologie, CHU Angers, Angers, France
- Université d'Angers, Inserm, CNRS, Nantes Université, CRCI2NA, Angers, France
| | - Assia Djema
- Service de Néphrologie-Dialyse, Centre Hospitalier de Cholet, Cholet, France
| | - Nicolas Henry
- Service de Néphrologie-Dialyse, Centre Hospitalier de Laval, Laval, France
| | - Anne Croué
- Département de pathologie cellulaire et tissulaire, CHU d'Angers, Angers, France
| | | | - Marie-Christine Copin
- Université d'Angers, Inserm, CNRS, Nantes Université, CRCI2NA, Angers, France
- Département de pathologie cellulaire et tissulaire, CHU d'Angers, Angers, France
| | - Jean-François Augusto
- Service de Néphrologie-Dialyse-Transplantation, CHU d'Angers, Angers, France
- Université d'Angers, Inserm, CNRS, Nantes Université, CRCI2NA, Angers, France
| | - Benoît Brilland
- Service de Néphrologie-Dialyse-Transplantation, CHU d'Angers, Angers, France
- Université d'Angers, Inserm, CNRS, Nantes Université, CRCI2NA, Angers, France
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Choi SE, Lee SB, Pyo JY, Ahn SS, Song JJ, Park YB, Lim BJ, Lee SW. Renal histopathological predictors of end-stage kidney disease in ANCA-associated vasculitis with glomerulonephritis: a single-centre study in Korea. Sci Rep 2023; 13:14850. [PMID: 37684336 PMCID: PMC10491748 DOI: 10.1038/s41598-023-41811-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 08/31/2023] [Indexed: 09/10/2023] Open
Abstract
This study investigated whether histopathological classification and histologic lesion scores could significantly and independently predict the progression to end-stage kidney disease (ESKD) in Korean patients with antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis-glomerulonephritis (AAV-GN). This study included 113 patients with AAV-GN confirmed by kidney biopsy. The glomerular, tubulointerstitial, and vascular lesions were systematically assessed using a scoring system. The scoring system was adopted from the Banff scoring system but also the Oxford study and the revision of the ISN/RPS. For comparison, the scores were classified into two groups; the low, and the high, and the difference was investigated between ESKD and non-ESKD groups using Cox proportional analysis. At diagnosis, the median age was 59.0 years and 33.6% were males. Of 113 patients, 44.2% had ESKD progression during follow-up. There were significant differences in several kidney-, inflammation-, and AAV-pathogenesis-related variables between AAV-GN patients with ESKD and those without. The sclerotic class exhibited the worst renal prognosis among the four histopathological classes. Among histopathological features, high interstitial fibrosis, tubular atrophy and global glomerulitis scores were significantly associated with ESKD progression. Whereas multivariable Cox analysis revealed only a high global glomerulitis score which means global endocapillary hypercellularity in a larger number of glomeruli is an independent predictor of ESKD progression. Moreover, among clinical and histopathological features, a high global glomerulitis score could also predict ESKD progression in addition to serum blood urea nitrogen and creatinine. This study demonstrated the worst renal prognosis for the sclerotic class and first discovered that a high global glomerulitis score was an independent predictor of ESKD in patients with AAV-GN.
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Affiliation(s)
- Sung-Eun Choi
- Department of Pathology, CHA University, CHA Bundang Medical Center, Seongnam-si, Kyeonggi-do, Republic of Korea
| | - Soo Bin Lee
- Department of Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jung Yoon Pyo
- Division of Rheumatology Department of Internal Medicine, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Sung Soo Ahn
- Division of Rheumatology Department of Internal Medicine, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Jason Jungsik Song
- Division of Rheumatology Department of Internal Medicine, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
- Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Yong-Beom Park
- Division of Rheumatology Department of Internal Medicine, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
- Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Beom Jin Lim
- Department of Pathology, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonju-ro, Gangnam-gu, Seoul, 06273, Republic of Korea.
| | - Sang-Won Lee
- Division of Rheumatology Department of Internal Medicine, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.
- Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul, Republic of Korea.
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Tao M, He Y, Li L, Li Y, Liao W, Nie H, Gao P. Identification and validation of immune-associated NETosis subtypes and biomarkers in anti-neutrophil cytoplasmic antibody associated glomerulonephritis. Front Immunol 2023; 14:1177968. [PMID: 37465687 PMCID: PMC10351423 DOI: 10.3389/fimmu.2023.1177968] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 06/15/2023] [Indexed: 07/20/2023] Open
Abstract
Background NETosis is a new form of cell death, marked by DNA chromatin release from dead neutrophils. While it aids in microbe defense, it may worsen inflammation in autoimmune diseases, causing tissue harm. The impact of NETosis on Anti-neutrophil Cytoplasmic Antibody-associated Glomerulonephritis (ANCA-GN) remains unexplored and requires investigation. Methods First, a weighted gene co-expression network analysis (WGCNA) was conducted to uncover differential expression of neutrophil extranuclear trap-associated genes (DE-NETs) in ANCA-GN. The NETosisScore model was established through the single sample gene set enrichment analysis (ssGSEA), which categorized all patients into high-risk and low-risk groups. The accuracy of model was assessed by ROC curve. The biological function of various subgroups was explored through Gene Set Variation Analysis (GSVA), while the abundance of immune cell infiltration was measured with CIBERSORT. Furthermore, the key NETosis-related genes (NRGs) were identified using three machine learning algorithms, and their relationship with renal function was analyzed through the NephroseqV5 database. Through the application of qPCR and immunohistochemical staining techniques, the mRNA and protein expression levels of NRGs were determined in patients with ANCA-GN and control. Results A NETosisScore model was developed from 18 DE-NETs using the ssGSEA algorithm. The model's ability to predict ANCA-GN patients with a ROC AUC of 0.921. The high-risk group in ANCA-GN showed enrichment of immune-related pathways and greater infiltration of immune cells, as revealed by KEGG enrichment analysis and CIBERSORT. Using three machine learning algorithms, we identified six NRGs. Significant positive correlations were found between NRGs and CCR, macrophages, T-cell co-inhibition, and TIL. Further KEGG analysis revealed that the functions of NRGs may be closely related to the toll-like receptor signaling pathway. The levels of NRGs increased as kidney function declined and were positively correlated with Scr (serum creatinine) and negatively correlated with GFR (glomerular filtration rate), qPCR analysis showed increased expression of most NRGs in ANCA-GN patients. Furthermore, immunohistochemical staining confirmed higher expression of all NRGs in ANCA-GN patients. Conclusion NETosisScore model accurately predicts high-risk patients in ANCA-GN with enriched immune pathways, 6 NRGs identified as potential biomarkers.
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Affiliation(s)
- Mi Tao
- Department of Nephrology, Zhongnan Hospital, Wuhan University, Wuhan, China
| | - Yiqing He
- Department of Nephrology, Zhongnan Hospital, Wuhan University, Wuhan, China
| | - Lijuan Li
- Department of Hematology, Zhongnan Hospital, Wuhan University, Wuhan, China
| | - Yuyan Li
- Department of Nephrology, Zhongnan Hospital, Wuhan University, Wuhan, China
| | - Wenwen Liao
- Department of Nephrology, Zhongnan Hospital, Wuhan University, Wuhan, China
| | - Haihang Nie
- Department of Gastroenterology, Zhongnan Hospital, Wuhan University, Wuhan, China
| | - Ping Gao
- Department of Nephrology, Zhongnan Hospital, Wuhan University, Wuhan, China
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Matsumoto K, Suzuki K, Yasuoka H, Hirahashi J, Yoshida H, Magi M, Noguchi-Sasaki M, Kaneko Y, Takeuchi T. Longitudinal monitoring of circulating immune cell phenotypes in anti-neutrophil cytoplasmic antibody-associated vasculitis. Autoimmun Rev 2023; 22:103271. [PMID: 36627064 DOI: 10.1016/j.autrev.2023.103271] [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: 12/10/2022] [Accepted: 01/05/2023] [Indexed: 01/09/2023]
Abstract
Anti-neutrophil cytoplasmic antibody-associated vasculitis (AAV) is a necrotizing multiorgan autoimmune disease that affects small- to medium-sized blood vessels. Despite the improvements in treatments, half of the patients with AAV still experience disease relapses. In this review, we focus on peripheral leukocyte properties and phenotypes in patients with AAV. In particular, we explore longitudinal changes in circulating immune cell phenotypes during the active phase of the disease and treatment. The numbers and phenotypes of leukocytes in peripheral blood were differs between AAV and healthy controls, AAV in active versus inactive phase, AAV in treatment responders versus non-responders, and AAV with and without severe infection. Therefore, biomarkers detected in peripheral blood immune cells may be useful for longitudinal monitoring of disease activity in AAV.
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Affiliation(s)
- Kotaro Matsumoto
- Division of Rheumatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan.
| | - Katsuya Suzuki
- Division of Rheumatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan
| | - Hidekata Yasuoka
- Division of Rheumatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan; Division of Rheumatology, Department of Internal Medicine, Fujita Health University School of Medicine, Aichi, Japan
| | - Junichi Hirahashi
- Center for General Medicine Education, Keio University School of Medicine, Tokyo, Japan
| | | | - Mayu Magi
- Chugai Pharmaceutical Co. Ltd., Kanagawa, Japan
| | | | - Yuko Kaneko
- Division of Rheumatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan
| | - Tsutomu Takeuchi
- Division of Rheumatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan
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Prognostic factors associated with advanced chronic kidney disease in a cohort of patients with ANCA vasculitis and renal involvement. Rheumatol Int 2023; 43:487-494. [PMID: 36637487 DOI: 10.1007/s00296-023-05272-y] [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: 07/27/2022] [Accepted: 01/04/2023] [Indexed: 01/14/2023]
Abstract
OBJECTIVE The aim of this study was to evaluate prognostic factors associated with advanced chronic kidney disease (ACKD) in a cohort of patients with ANCA-associated vasculitis and renal involvement. METHODS Observational retrospective study. We included patients with biopsy-proven ANCA glomerulonephritis (GN) diagnosed between 2001 and 2016, with at least 1-year follow-up. Data were recorded at diagnosis, end of induction, after 12 months of treatment, and at the end of follow-up. We analysed clinical-analytical data and renal histopathology, as well as treatments, dialysis requirement, relapses and death. Univariate analysis was performed to identify factors associated with long-term ACKD (eGFR < 30 ml/min). Multivariate analysis using an alternative outcome (eGFR at the end of follow-up) was performed. Diagnostic accuracy for ACKD of each predictor variable was compared using AUC of ROC curves. RESULTS Sixty patients were included: 17 GPA, 14 MPA, 5 EGPA, and 24 RLV. Forty-six patients were women (76.7%). Mean age at diagnosis was 67.8 years (SD 13.1), and median follow-up time was 4.2 years (IQR 2.2-6.8). At the end of follow-up, 12 patients (20.0%) had an eGFR < 30 ml/min. Univariate analysis showed a statistically significant association of ACKD with sclerotic class biopsy (OR 7.17, 95% CI 1.34-38.31), 12-month proteinuria (OR 5.16, 95% CI 1.16-22.87), and creatinine at diagnosis (OR 1.24, 95% CI 1.02-1.52), end of induction (OR 15.40, 95% CI 2.41-98.28), and after 12 months (OR 19.25, 95% CI 2.75-134.92). In the multivariate analysis, eGFR at baseline (< 0.001), after 6 months (< 0.001) and 12 months of treatment (< 0.001), remained statistically associated with eGFR at the end of follow-up. The best diagnostic accuracy in ROC curves was shown by serum creatinine at the end of induction treatment (AUC 0.93) and after 12 months (AUC 0.94). CONCLUSION In this cohort of patients with ANCA GN, creatinine and eGFR at baseline and after 6 and 12 months of treatment were the best predictors of ACKD at the end of follow-up.
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