1
|
Rodriguez-Ramirez S, Wiegley N, Mejia-Vilet JM. Kidney Biopsy in Management of Lupus Nephritis: A Case-Based Narrative Review. Kidney Med 2024; 6:100772. [PMID: 38317756 PMCID: PMC10840121 DOI: 10.1016/j.xkme.2023.100772] [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] [Indexed: 02/07/2024] Open
Abstract
Kidney involvement in patients with lupus highly increases morbidity and mortality. In recent years, several reports have emphasized the dissociation between clinical and histological findings and highlighted the role of kidney biopsy as an instrument for diagnosis and follow-up of lupus nephritis. The kidney biopsy at initial diagnosis allows an early diagnosis, assessment of activity and chronicity, and detection of nonimmune complex nephritis. A kidney biopsy repeated months after treatment aids in the detection of persistent histological inflammation, which has been linked to the occurrence of future kidney relapses. A kidney biopsy at a relapse detects histological changes including chronic scarring. Finally, a kidney biopsy in patients with a clinical response undergoing maintenance immunosuppression may aid therapy tapering and/or suspension. The evidence supporting the use of a kidney biopsy in different scenarios across the course of lupus nephritis is heterogeneous, with most reports assessing the value for the diagnosis of a first or relapsing flare. In contrast, less evidence suggests additional therapeutic-modifying information derived from repeat posttreatment biopsies and biopsies to evaluate treatment tapering or suspension. In this clinical case-based review, we examine the role of kidney biopsy as a tool to improve clinical outcomes of patients with lupus nephritis.
Collapse
Affiliation(s)
- Sonia Rodriguez-Ramirez
- Division of Nephrology, University Health Network, Toronto, Ontario, Canada
- Ajmera Transplant Centre, University Health Network, Toronto, Ontario, Canada
| | - Nasim Wiegley
- University of California, Davis School of Medicine, Division of Nephrology, Sacramento, California, United States
| | - Juan Manuel Mejia-Vilet
- Department of Nephrology and Mineral Metabolism. Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| |
Collapse
|
2
|
Yin C, Xiao W, Hu X, Liu X, Xian H, Su J, Zhang C, Qin X. Non-invasive prediction of the chronic degree of lupus nephropathy based on ultrasound radiomics. Lupus 2024; 33:121-128. [PMID: 38320976 DOI: 10.1177/09612033231223373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
OBJECTIVE Through machine learning (ML) analysis of the radiomics features of ultrasound extracted from patients with lupus nephritis (LN), this attempt was made to non-invasively predict the chronicity index (CI)of LN. METHODS A retrospective collection of 136 patients with LN who had renal biopsy was retrospectively collected, and the patients were randomly divided into training set and validation set according to 7:3. Radiomics features are extracted from ultrasound images, independent factors are obtained by using LASSO dimensionality reduction, and then seven ML models were used to establish predictive models. At the same time, a clinical model and an US model were established. The diagnostic efficacy of the model is evaluated by analysis of the receiver operating characteristics (ROC) curve, accuracy, specificity, and sensitivity. The performance of the seven machine learning models was compared with each other and with clinical and US models. RESULTS A total of 1314 radiomics features are extracted from ultrasound images, and 5 features are finally screened out by LASSO for model construction, and the average ROC of the seven ML is 0.683, among which the Xgboost model performed the best, and the AUC in the test set is 0.826 (95% CI: 0.681-0.936). For the same test set, the AUC of clinical model constructed based on eGFR is 0.560 (95% CI: 0.357-0.761), and the AUC of US model constructed based on Ultrasound parameters is 0.679 (95% CI: 0.489-0.853). The Xgboost model is significantly more efficient than the clinical and US models. CONCLUSION ML model based on ultrasound radiomics features can accurately predict the chronic degree of LN, which can provide a valuable reference for clinicians in the treatment strategy of LN patients.
Collapse
Affiliation(s)
- Chen Yin
- Department of Ultrasound, The Second Clinical Medical College, North Sichuan Medical College, Nan Chong, China
| | - Weihan Xiao
- Department of Ultrasound, The Second Clinical Medical College, North Sichuan Medical College, Nan Chong, China
| | - Xiaomin Hu
- Department of Ultrasound, The Second Clinical Medical College, North Sichuan Medical College, Nan Chong, China
| | - Xuebin Liu
- Department of Ultrasound, The Second Clinical Medical College, North Sichuan Medical College, Nan Chong, China
| | - Huaming Xian
- Department of Nephrology, The Second Clinical Medical College, North Sichuan Medical College, Nan Chong, China
| | - Jun Su
- Department of Ultrasound, The Second Clinical Medical College, North Sichuan Medical College, Nan Chong, China
| | - Chaoxue Zhang
- Department of Ultrasound, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Xiachuan Qin
- Department of Ultrasound, The Second Clinical Medical College, North Sichuan Medical College, Nan Chong, China
- Department of Ultrasound, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| |
Collapse
|
3
|
Wang J, Zhu M, Jiao C, Xu X, Xu F, Liang D, Liu Z, Chen Y, Zhang H. Association of regulatory T cells with renal outcomes in patients with proliferative lupus nephritis. Lupus 2023; 32:1237-1244. [PMID: 37695664 DOI: 10.1177/09612033231201619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
BACKGROUND Despite progress in the diagnosis and treatment of proliferative lupus nephritis (PLN), the prognosis remains unfavorable. Previous investigations have suggested that the deficiency of regulatory T cells (Tregs) is involved in the pathogenesis of systemic lupus erythematosus (SLE) and lupus nephritis (LN). But the prognostic value of Tregs in PLN remains controversial. This study aimed to investigate the association of Tregs with renal outcomes in patients with PLN. METHODS The baseline and follow-up data of patients with biopsy-proven PLN were collected in this study. All patients were divided into two groups according to whether the renal endpoint event occurred. Clinicopathologic features and therapeutic responses were compared between the two groups. Cox regression analyses curve fitting and threshold effect analysis were implemented to investigate the relationship between Tregs level and the long-term renal outcomes. The renal endpoint was defined as end-stage kidney disease (ESKD) or doubling the SCr value. RESULTS A total of 405 PLN patients were included. After a follow-up of 71.53 (53.13-97.47) months, 42 (10.4%) patients reached the renal endpoint. The Treg cell counts (16/μL) in the renal endpoint group were significantly decreased than that in the non-renal endpoint group (p < 0.001). Univariate and multivariate Cox regression analyses showed that the high level of Tregs was an independent protective factor for the long-term renal prognosis of PLN. Smooth curve fitting of the generalized additive mixed model analysis indicated that the risk of renal endpoint first decreased with Tregs and then slightly increased along with Treg cell levels. The segmented linear model revealed that when Treg cell counts <46/μL, the risk of renal endpoint decreased by 6.8% for every 1 μL increase in Treg levels (p = 0.0029). CONCLUSION Treg cell counts are closely related to the long-term renal outcomes of patients with PLN, and increasing Treg cell levels may play an important role in improving the prognosis of the kidney, but there may be a turning point (i.e., threshold effect) at the Treg cell counts that leads to directional changes in the renal outcomes.
Collapse
Affiliation(s)
- Jingjing Wang
- National Clinical Research Center for Kidney Diseases, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Mengyue Zhu
- Department of Nephrology, Northern Jiangsu People's Hospital, Yangzhou, China
| | - Chenfeng Jiao
- National Clinical Research Center for Kidney Diseases, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Xiaodong Xu
- National Clinical Research Center for Kidney Diseases, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Feng Xu
- National Clinical Research Center for Kidney Diseases, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Dandan Liang
- National Clinical Research Center for Kidney Diseases, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Zhengzhao Liu
- National Clinical Research Center for Kidney Diseases, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Yinghua Chen
- National Clinical Research Center for Kidney Diseases, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Haitao Zhang
- National Clinical Research Center for Kidney Diseases, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| |
Collapse
|
4
|
Cody EM, Wenderfer SE, Sullivan KE, Kim AHJ, Figg W, Ghumman H, Qiu T, Huang B, Devarajan P, Brunner HI. Urine biomarker score captures response to induction therapy with lupus nephritis. Pediatr Nephrol 2023; 38:2679-2688. [PMID: 36715772 PMCID: PMC10393841 DOI: 10.1007/s00467-023-05888-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 01/12/2023] [Accepted: 01/13/2023] [Indexed: 01/31/2023]
Abstract
BACKGROUND The Renal Activity Index for Lupus (RAIL) consists of urine protein assessment of neutrophil gelatinase-associated lipocalin, kidney injury molecule-1, monocyte chemotactic protein 1, adiponectin, hemopexin, and ceruloplasmin, which non-invasively identifies lupus nephritis (LN). We aimed to delineate RAIL scores with inactive versus active LN and changes over time with response to LN induction therapy. METHODS There were 128 pediatric patients with systemic lupus erythematosus (SLE) and age-matched healthy controls recruited in a prospective case control study, with kidney biopsy confirmation of LN. Laboratory and clinical information was recorded and urine collected at diagnosis and end of induction and during maintenance therapy. Response to therapy was assessed by repeat kidney biopsy or laboratory parameters. Urine was assayed for RAIL biomarkers and the RAIL score calculated. RESULTS Pediatric RAIL (pRAIL) scores from 128 children and young adults with SLE (with/without LN: 70/38) including 25 during LN induction therapy, differentiated clinically active LN from inactive LN or without LN, and controls (all p < 0.0017). pRAIL scores significantly decreased with complete LN remission by 1.07 ± 1.7 (p = 0.03). CONCLUSIONS The RAIL biomarkers differentiate LN patients based on activity of kidney disease, with decreases of ≥ 1 in pRAIL scores indicating complete response to induction therapy. Significantly lower RAIL scores in healthy controls and in SLE patients without known LN raise the possibility of subclinical kidney disease. A higher resolution version of the Graphical abstract is available as Supplementary information.
Collapse
Affiliation(s)
- Ellen M Cody
- Division of Nephrology, Hypertension and Pheresis, Department of Pediatrics, Washington University in St. Louis School of Medicine, 660 S. Euclid Ave, Campus, Box 8116, St. Louis, MO, 63110, USA.
| | - Scott E Wenderfer
- Department of Pediatrics, University of British Columbia, Vancouver, BC, Canada
- Nephrology, B.C. Children's Hospital, Vancouver, BC, Canada
| | - Kathleen E Sullivan
- Division of Allergy and Immunology, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Alfred H J Kim
- Division of Rheumatology, Department of Medicine, Washington University School of Medicine, St Louis, MO, USA
| | - Wesley Figg
- Medical School, Baylor College of Medicine, Houston, TX, USA
| | - Harneet Ghumman
- Department of Rheumatology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Tingting Qiu
- Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Bin Huang
- Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
- Division of Nephrology and Hypertension, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Prasad Devarajan
- Division of Nephrology and Hypertension, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
- Department of Pediatrics, University of Cincinnati, Cincinnati, OH, USA
| | - Hermine I Brunner
- Department of Rheumatology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
- Department of Pediatrics, University of Cincinnati, Cincinnati, OH, USA
| |
Collapse
|
5
|
Duong MD, Wang S, Schwartz D, Mowrey WB, Broder A, Goilav B. Total cortical interstitial inflammation predicts chronic kidney disease progression in patients with lupus nephritis. Nephrol Dial Transplant 2023; 38:1469-1476. [PMID: 36220148 PMCID: PMC10229284 DOI: 10.1093/ndt/gfac286] [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: 06/09/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND End-stage kidney disease (ESKD) from lupus nephritis (LN) is a major cause of morbidity and mortality in patients with systemic lupus erythematosus (SLE). Kidney biopsy is the gold standard for diagnosis and prognostication of LN. While interstitial fibrosis and tubular atrophy (IFTA) predict progression to ESKD, the National Institutes of Health (NIH) classification of interstitial inflammation in unscarred cortical parenchyma is not predictive of chronic kidney disease (CKD) progression. The objective of this study was to determine whether total cortical interstitial inflammation that accounts for inflammation in the entire cortical parenchyma could predict CKD progression in patients with LN. Early identification of at-risk patients may improve outcomes. METHODS This retrospective cohort study included 125 SLE patients with LN class III, IV, V or mixed (III/V, IV/V) on the index biopsy (2005-2018). Kidney biopsies were reviewed and assigned based on the 2018 NIH Activity Index (AI) and tubulointerstitial lesion categories. Total interstitial inflammation in the entire cortical parenchyma was graded as 0, 1, 2 or 3, corresponding to <10%, 10-25%, 26-50% and >50%, respectively, of the total cortical parenchyma containing an inflammatory infiltrate (similar to the definition used in the Banff total inflammation score). CKD progression was defined as an estimated glomerular filtration rate decrease of ≥30% within 5 years after the index biopsy. Kaplan-Meier survival curves and Cox proportional hazards models were performed to compare the two scoring systems, the total cortical intestinal inflammation score and the NIH interstitial inflammation score as predictors of CKD progression. RESULTS Of 125 patients, 46 experienced CKD progression; 21 of 46 subsequently developed ESKD, 28 (22.4%) had moderate-severe total cortical interstitial inflammation and 8 (6.4%) had moderate-severe NIH interstitial inflammation. There were no differences in baseline characteristics between progressors and nonprogressors. Total cortical interstitial inflammation was associated with CKD progression in time-dependent analyses [hazard ratio 2.45 (95% confidence interval 1.2-4.97)] adjusted for age at biopsy, race, sex, LN class and hypertensive vascular change on kidney biopsy. The NIH interstitial inflammation was not associated with CKD progression. CONCLUSIONS In contrast to the current NIH interstitial inflammation classification, accounting for interstitial inflammation in the entire cortical parenchyma allows identification of patients at risk for CKD progression in LN.
Collapse
Affiliation(s)
- Minh Dien Duong
- Department of Pediatrics, Nephrology, Children's Hospital at Montefiore, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Shudan Wang
- Department of Medicine, Rheumatology, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Daniel Schwartz
- Department of Surgical Pathology, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Wenzhu B Mowrey
- Department of Epidemiology and Biostatistics, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Anna Broder
- Department of Medicine, Rheumatology, Hackensack University Medical Center, Hackensack, NJ, USA
| | - Beatrice Goilav
- Department of Pediatrics, Nephrology, Children's Hospital at Montefiore, Albert Einstein College of Medicine, Bronx, NY, USA
| |
Collapse
|
6
|
Acute kidney injury requiring kidney replacement therapy in childhood lupus nephritis: a cohort study of the Pediatric Nephrology Research Consortium and Childhood Arthritis and Rheumatology Research Alliance. Pediatr Nephrol 2022; 38:1653-1665. [PMID: 36251074 DOI: 10.1007/s00467-022-05775-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 09/21/2022] [Accepted: 09/25/2022] [Indexed: 10/24/2022]
Abstract
BACKGROUND Acute kidney injury (AKI) is common in lupus nephritis (LN) and a risk factor for development of chronic kidney disease. In adults with LN, AKI severity correlates with the incidence of kidney failure and patient survival. Data on AKI outcomes in children with LN, particularly those requiring kidney replacement therapy (KRT), are limited. METHODS A multicenter, retrospective cohort study was performed in children diagnosed between 2010 and 2019 with LN and AKI stage 3 treated with dialysis (AKI stage 3D). Descriptive statistics were used to characterize demographics, clinical data, and kidney biopsy findings; treatment data for LN were not included. Logistic regression was used to examine the association of these variables with kidney failure. RESULTS Fifty-nine patients (mean age 14.3 years, 84.7% female) were identified. The most common KRT indications were fluid overload (86.4%) and elevated blood urea nitrogen/creatinine (74.6%). Mean follow-up duration was 3.9 ± 2.9 years. AKI recovery without progression to kidney failure occurred in 37.3% of patients. AKI recovery with later progression to kidney failure occurred in 25.4% of patients, and there was no kidney recovery from AKI in 35.6% of patients. Older age, severe (> 50%) tubular atrophy and interstitial fibrosis, and National Institutes of Health (NIH) chronicity index score > 4 on kidney biopsy were associated with kidney failure. CONCLUSIONS Children with LN and AKI stage 3D have a high long-term risk of kidney failure. Severe tubular atrophy and interstitial fibrosis at the time of AKI, but not AKI duration, are predictive of kidney disease progression. A higher resolution version of the Graphical abstract is available as Supplementary information.
Collapse
|
7
|
Prognostic value of modified National Institute of Health activity and chronicity scoring in determining complete renal response in newly diagnosed lupus nephritis: a retrospective single centre study. Int Urol Nephrol 2022; 54:2075-2082. [DOI: 10.1007/s11255-022-03112-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 01/09/2022] [Indexed: 11/29/2022]
|