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Su B, Jiang Y, Li Z, Zhou J, Rong L, Feng S, Zhong F, Sun S, Zhang D, Xia Z, Feng C, Huang W, Li X, Chen C, Hao Z, Wang M, Qin L, Chen M, Li Y, Ding J, Bao Y, Liu X, Deng F, Cheng X, Zhang L, Zhang X, Yang H, Peng X, Sun Q, Deng L, Jiang X, Xie M, Gao Y, Yu L, Liu L, Gao C, Mao J, Zheng W, Dang X, Xia H, Wang Y, Zhong X, Ding J, Lv J, Zhang H. Are children with IgA nephropathy different from adult patients? Pediatr Nephrol 2024; 39:2403-2412. [PMID: 38578470 PMCID: PMC11199250 DOI: 10.1007/s00467-024-06361-1] [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: 02/01/2024] [Revised: 03/14/2024] [Accepted: 03/24/2024] [Indexed: 04/06/2024]
Abstract
BACKGROUND Previously, several studies have indicated that pediatric IgA nephropathy (IgAN) might be different from adult IgAN, and treatment strategies might be also different between pediatric IgAN and adult IgAN. METHODS We analyzed two prospective cohorts established by pediatric and adult nephrologists, respectively. A comprehensive analysis was performed investigating the difference in clinical and pathological characteristics, treatment, and prognosis between children and adults with IgAN. RESULTS A total of 1015 children and 1911 adults with IgAN were eligible for analysis. More frequent gross hematuria (88% vs. 20%, p < 0.0001) and higher proteinuria (1.8 vs. 1.3 g/d, p < 0.0001) were seen in children compared to adults. In comparison, the estimated glomerular filtration rate (eGFR) was lower in adults (80.4 vs. 163 ml/min/1.73 m2, p < 0.0001). Hypertension was more prevalent in adult patients. Pathologically, a higher proportion of M1 was revealed (62% vs. 39%, p < 0.0001) in children than in adults. S1 (62% vs. 28%, p < 0.0001) and T1-2 (34% vs. 8%, p < 0.0001) were more frequent in adults. Adjusted by proteinuria, eGFR, and hypertension, children were more likely to be treated with glucocorticoids than adults (87% vs. 45%, p < 0.0001). After propensity score matching, in IgAN with proteinuria > 1 g/d, children treated with steroids were 1.87 (95% CI 1.16-3.02, p = 0.01) times more likely to reach complete remission of proteinuria compared with adults treated with steroids. CONCLUSIONS Children present significantly differently from adults with IgAN in clinical and pathological manifestations and disease progression. Steroid response might be better in children.
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Affiliation(s)
- Baige Su
- Department of Pediatric Nephrology, Peking University First Hospital, No. 1 Xi An Men Da Jie, Beijing, 100034, People's Republic of China
| | - Yuanyuan Jiang
- Renal Division, Peking University First Hospital, No.8 Xi Shi Ku Da Jie, Beijing, 100034, People's Republic of China
- Department of Nephrology, Beijing Hospital of Traditional Chinese Medicine, Capital Medical University, Beijing, China
| | - Zhihui Li
- Department of Nephrology, Rheumatology and Immunology, Hunan Children's Hospital, Changsha, Hunan, China
| | - Jianhua Zhou
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, 430030, Hubei Province, China
| | - Liping Rong
- Department of Pediatric Nephrology and Rheumatology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Shipin Feng
- Department of Pediatric Nephrology, Chengdu Women's and Children's Central Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Fazhan Zhong
- Pediatric Nephrology Department, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, 510623, Guangdong, China
| | - Shuzhen Sun
- Department of Pediatric Nephrology and Rheumatism and Immunology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250021, China
| | - Dongfeng Zhang
- Nephrology and Immunology Department, Children's Hospital of Hebei Province, Shijiazhuang, Hebei Province, China
| | - Zhengkun Xia
- Department of Pediatrics, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Chunyue Feng
- Department of Nephrology, Children Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Wenyan Huang
- Department of Nephrology and Rheumatology, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xiaoyan Li
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Chaoying Chen
- Department of Nephrology, Children's Hospital Affiliated to Capital Institute of Pediatrics, Beijing, China
| | - Zhihong Hao
- Department of Pediatric, Guangzhou First People's Hospital, the Second Affiliated Hospital of South China University of Technology, Guangzhou, China
| | - Mo Wang
- Department of Nephrology, Children's Hospital of Chongqing Medical University, Chongqing, China
| | - Li Qin
- Department of Pediatrics, The First People's Hospital of Yunnan Province, The Affiliated Hospital of Kunming Science and Technology University, Kunming, China
| | - Minguang Chen
- Department of Pediatric Nephrology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Yuanyuan Li
- Department of Pediatrics, Fuzong Clinical Medical College, Fujian Medical University, Fuzhou, 350025, China
- Department of Nephrology, Rheumatology and Immunology, Fujian Children's Hospital, Fuzhou, 350014, China
| | - Juanjuan Ding
- Department of Pediatric Nephrology, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science & Technology, Wuhan, 430016, Hubei, China
| | - Ying Bao
- Department of Nephrology, Xi'an Children's Hospital, Xian, Shaanxi, China
| | - Xiaorong Liu
- Department of Pediatric Nephrology, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Fang Deng
- Department of Nephrology, Anhui Provincial Children's Hospital, Hefei, China
| | - Xueqin Cheng
- Department of Nephrology, Children's Hospital of Nanjing Medical University, Nanjing, China
| | - Li Zhang
- Department of Pediatric Nephrology, The First Hospital of Jilin University, Changchun, China
| | - Xuan Zhang
- Department of General Medicine, Tianjin Children's Hospital, Tianjin, China
| | - Huandan Yang
- Department of Nephrology, Xuzhou Children's Hospital, Xuzhou Medical University, Xuzhou, China
| | - Xiaojie Peng
- Department of Nephrology, Jiangxi Provincial Children's Hospital, Nanchang, 330006, China
| | - Qianliang Sun
- Department of Nephrology, Rheumatology and Immunology, Hunan Children's Hospital, Changsha, Hunan, China
| | - Linxia Deng
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, 430030, Hubei Province, China
| | - Xiaoyun Jiang
- Department of Pediatric Nephrology and Rheumatology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Min Xie
- Department of Pediatric Nephrology, Chengdu Women's and Children's Central Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Yan Gao
- Pediatric Nephrology Department, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, 510623, Guangdong, China
| | - Lichun Yu
- Department of Pediatric Nephrology and Rheumatism and Immunology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250021, China
| | - Ling Liu
- Nephrology and Immunology Department, Children's Hospital of Hebei Province, Shijiazhuang, Hebei Province, China
| | - Chunlin Gao
- Department of Pediatrics, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Jianhua Mao
- Department of Nephrology, Children Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Weihua Zheng
- Department of Nephrology and Rheumatology, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xiqiang Dang
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Hua Xia
- Department of Nephrology, Children's Hospital Affiliated to Capital Institute of Pediatrics, Beijing, China
| | - Yujie Wang
- Medical Data Science Center, Medical Research Center, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China
| | - Xuhui Zhong
- Department of Pediatric Nephrology, Peking University First Hospital, No. 1 Xi An Men Da Jie, Beijing, 100034, People's Republic of China.
| | - Jie Ding
- Department of Pediatric Nephrology, Peking University First Hospital, No. 1 Xi An Men Da Jie, Beijing, 100034, People's Republic of China.
| | - Jicheng Lv
- Renal Division, Peking University First Hospital, No.8 Xi Shi Ku Da Jie, Beijing, 100034, People's Republic of China.
| | - Hong Zhang
- Renal Division, Peking University First Hospital, No.8 Xi Shi Ku Da Jie, Beijing, 100034, People's Republic of China
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Shima Y, Mukaiyama H, Tanaka Y, Shimabukuro W, Nozu K, Kaito H, Tanaka R, Sako M, Iijima K, Tokuhara D, Yoshikawa N, Nakanishi K. Factors related to recurrence of proteinuria in childhood IgA nephropathy. Pediatr Nephrol 2024; 39:463-471. [PMID: 37594578 DOI: 10.1007/s00467-023-06116-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 07/09/2023] [Accepted: 07/27/2023] [Indexed: 08/19/2023]
Abstract
BACKGROUND Proteinuria remission is the most significant predictive factor for kidney outcome in childhood IgA nephropathy (c-IgAN). Even if proteinuria remission can be obtained, some patients have recurrence of proteinuria in the long-term. METHODS This is a retrospective analysis of 312 cases of proteinuria remission among 538 consecutive children with biopsy-proven IgAN from 1976 to 2013. To elucidate the incidence and factors related to recurrence of proteinuria in c-IgAN, we compare clinical and pathological findings between patients with and without recurrence of proteinuria. RESULTS Among 312 patients with remission of proteinuria, 91 (29.2%) had recurrence of proteinuria within the observation period (median 8 years). Using a multivariate Cox regression analysis, significant factors associated with recurrence of proteinuria were onset age (HR 1.13 [95%CI: 1.05-1.22], P = 0.002) and presence of hematuria after proteinuria remission (HR 2.11 [95%CI: 1.30-3.45], P = 0.003). The Kaplan-Meier analysis showed significant differences in CKD G3a-G5-free survival between the patients with no-recurrence of proteinuria, recurrence of proteinuria and non-proteinuria remission (P < 0.0001, log-rank test). Kidney survival was 100% in no-recurrence of proteinuria, 92.2% in recurrence of proteinuria, and 65.6% in non-proteinuria remission at 15 years. Cox analyses adjusted by proteinuria remission showed that recurrence of proteinuria (HR 03.10e9 [95%CI: NA], P = 0.003) was a significant factor associated with progression to CKD G3a-G5 in all patients with c-IgAN. CONCLUSIONS Approximately 30% of patients with proteinuria remission had recurrence of proteinuria regardless of treatment. Both remission and recurrence of proteinuria are significant prognostic factors for kidney outcome. A higher resolution version of the Graphical abstract is available as Supplementary information.
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Affiliation(s)
- Yuko Shima
- Department of Pediatrics, Wakayama Medical University, Kimiidera, Wakayama, 811-1, Japan.
| | - Hironobu Mukaiyama
- Department of Pediatrics, Wakayama Medical University, Kimiidera, Wakayama, 811-1, Japan
| | - Yu Tanaka
- Department of Pediatrics, Wakayama Medical University, Kimiidera, Wakayama, 811-1, Japan
| | - Wataru Shimabukuro
- Department of Child Health and Welfare (Pediatrics), Graduate School of Medicine, University of the Ryukyus, Nishihara-Cho, Okinawa, Japan
| | - Kandai Nozu
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Hiroshi Kaito
- Pediatric Nephrology, Hyogo Children's Hospital, Kobe, Japan
| | - Ryojiro Tanaka
- Pediatric Nephrology, Hyogo Children's Hospital, Kobe, Japan
| | - Mayumi Sako
- Division for Clinical Trials, Clinical Research Center, National Center for Child Health and Development, Tokyo, Japan
| | - Kazumoto Iijima
- Department of Pediatrics, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Daisuke Tokuhara
- Department of Pediatrics, Wakayama Medical University, Kimiidera, Wakayama, 811-1, Japan
| | - Norishige Yoshikawa
- Clinical Research Center, Takatsuki General Hospital, Takatsuki City, Osaka, Japan
| | - Koichi Nakanishi
- Department of Child Health and Welfare (Pediatrics), Graduate School of Medicine, University of the Ryukyus, Nishihara-Cho, Okinawa, Japan
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Wang Y, Huang N, Wang Y, Jiang Y, Yimamuyushan A, Xia X, Fan L, Yu J, He J, Chen W, Liu Q. Comparative analysis between the safety and efficacy of oral corticosteroids versus corticosteroids pulse therapies in IgA nephropathy. Ren Fail 2023; 45:2255683. [PMID: 37724560 PMCID: PMC10512771 DOI: 10.1080/0886022x.2023.2255683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 08/31/2023] [Indexed: 09/21/2023] Open
Abstract
OBJECTIVE This study retrospectively compared the safety and efficacy of oral corticosteroid therapy (OCT) and corticosteroid pulse therapy (CPT) in the treatment of IgA nephropathy. METHODS One ninety-two patients were diagnosed with IgA nephropathy and had an estimated glomerular filtration rate > 15mL/min/1.73m2 and 24-h urine protein level of 0.75-3.5g. Patients were divided into CPT and OCT groups according to the treatment protocol. The differences in the efficacy and safety between the two groups were assessed by logistic regression analysis and propensity score matching. RESULTS Significant differences at baseline, including 24-h urine protein level and eGFR, were observed between the two groups. Logistic regression analysis indicated that the remission rate increased significantly, while the incidences of total adverse events and infections decreased in CPT group compared with the OCT group after adjusting the potential confounding factors. Forty-seven pairs of subjects are matched by using propensity score matching with similar baseline data. The results indicate that the total remission rate and complete remission rate were significantly higher, while the incidences of total adverse events were lower (p = 0.008) in the CPT group than in the OCT group. The subgroup analysis showed that CPT group was more likely to achieve remission in patients with initial 24-h urine protein levels falling into the range of 2-3.5 g and Oxford Classification of S1 or C1/2 (p < 0.05). CONCLUSION Among patients with IgA nephropathy and 24-h urine protein levels of 0.75-3.5g, CPT may be more effective than OCT in reducing urinary protein levels and improving renal function with a lower incidence of adverse events.
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Affiliation(s)
- Yu Wang
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- NHC Key Laboratory of Clinical Nephrology (Sun Yat-Sen University) and Guangdong Provincial Key Laboratory of Nephrology, Guangzhou, China
| | - Naya Huang
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- NHC Key Laboratory of Clinical Nephrology (Sun Yat-Sen University) and Guangdong Provincial Key Laboratory of Nephrology, Guangzhou, China
| | - Yunuo Wang
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- NHC Key Laboratory of Clinical Nephrology (Sun Yat-Sen University) and Guangdong Provincial Key Laboratory of Nephrology, Guangzhou, China
| | - Yu Jiang
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- NHC Key Laboratory of Clinical Nephrology (Sun Yat-Sen University) and Guangdong Provincial Key Laboratory of Nephrology, Guangzhou, China
| | - Aikeda Yimamuyushan
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- NHC Key Laboratory of Clinical Nephrology (Sun Yat-Sen University) and Guangdong Provincial Key Laboratory of Nephrology, Guangzhou, China
| | - Xi Xia
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- NHC Key Laboratory of Clinical Nephrology (Sun Yat-Sen University) and Guangdong Provincial Key Laboratory of Nephrology, Guangzhou, China
| | - Li Fan
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- NHC Key Laboratory of Clinical Nephrology (Sun Yat-Sen University) and Guangdong Provincial Key Laboratory of Nephrology, Guangzhou, China
| | - Jianwen Yu
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- NHC Key Laboratory of Clinical Nephrology (Sun Yat-Sen University) and Guangdong Provincial Key Laboratory of Nephrology, Guangzhou, China
| | - Junbing He
- Jieyang Medical Rsearch Center, Jieyang People’s Hospital, Jieyang, Guangdong, China
| | - Wei Chen
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- NHC Key Laboratory of Clinical Nephrology (Sun Yat-Sen University) and Guangdong Provincial Key Laboratory of Nephrology, Guangzhou, China
| | - Qinghua Liu
- Department of Nephrology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- NHC Key Laboratory of Clinical Nephrology (Sun Yat-Sen University) and Guangdong Provincial Key Laboratory of Nephrology, Guangzhou, China
- Jieyang Medical Rsearch Center, Jieyang People’s Hospital, Jieyang, Guangdong, China
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Yu X, Li J, Tao C, Jiao J, Wan J, Zhong C, Yang Q, Shi Y, Zhang G, Yang H, Li Q, Wang M. Validation of the children international IgA nephropathy prediction tool based on data in Southwest China. Front Pediatr 2023; 11:1183562. [PMID: 37425278 PMCID: PMC10327563 DOI: 10.3389/fped.2023.1183562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 06/08/2023] [Indexed: 07/11/2023] Open
Abstract
Background Immunoglobulin A nephropathy (IgAN) is one of the most common kidney diseases leading to renal injury. Of pediatric cases, 25%-30% progress into end-stage kidney disease (ESKD) in 20-25 years. Therefore, predicting and intervening in IgAN at an early stage is crucial. The purpose of this study was to validate the availability of an international predictive tool for childhood IgAN in a cohort of children with IgAN treated at a regional medical centre. Methods An external validation cohort of children with IgAN from medical centers in Southwest China was formed to validate the predictive performance of the two full models with and without race differences by comparing four measures: area under the curve (AUC), the regression coefficient of linear prediction (PI), survival analysis curves for different risk groups, and R2D. Results A total of 210 Chinese children, including 129 males, with an overall mean age of 9.43 ± 2.71 years, were incorporated from this regional medical center. In total, 11.43% (24/210) of patients achieved an outcome with a GFR decrease of more than 30% or reached ESKD. The AUC of the full model with race was 0.685 (95% CI: 0.570-0.800) and the AUC of the full model without race was 0.640 (95% CI: 0.517-0.764). The PI of the full model with race and without race was 0.816 (SE = 0.006, P < 0.001) and 0.751 (SE = 0.005, P < 0.001), respectively. The results of the survival curve analysis suggested the two models could not well distinguish between the low-risk and high-risk groups (P = 0.359 and P = 0.452), respectively, no matter the race difference. The evaluation of model fit for the full model with race was 66.5% and without race was 56.2%. Conclusions The international IgAN prediction tool has risk factors chosen based on adult data, and the validation cohort did not fully align with the derivation cohort in terms of demographic characteristics, clinical baseline levels, and pathological presentation, so the tool may not be highly applicable to children. We need to build IgAN prediction models that are more applicable to Chinese children based on their particular data.
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Affiliation(s)
- Xixi Yu
- Department of Nephrology, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders,Children’s Hospital of Chongqing Medical University, Chongqing, China
| | - Jiacheng Li
- Department of Hematology and Oncology, Children's Hospital of Chongqing Medical University, Chongqing, China
| | - Chengrong Tao
- Department of Nephrology, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders,Children’s Hospital of Chongqing Medical University, Chongqing, China
| | - Jia Jiao
- Department of Nephrology, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders,Children’s Hospital of Chongqing Medical University, Chongqing, China
| | - Junli Wan
- Department of Nephrology, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders,Children’s Hospital of Chongqing Medical University, Chongqing, China
| | - Cheng Zhong
- Department of Nephrology, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders,Children’s Hospital of Chongqing Medical University, Chongqing, China
| | - Qin Yang
- Department of Nephrology, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders,Children’s Hospital of Chongqing Medical University, Chongqing, China
| | - Yongqi Shi
- Department of Nephrology, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders,Children’s Hospital of Chongqing Medical University, Chongqing, China
| | - Gaofu Zhang
- Department of Nephrology, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders,Children’s Hospital of Chongqing Medical University, Chongqing, China
| | - Haiping Yang
- Department of Nephrology, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders,Children’s Hospital of Chongqing Medical University, Chongqing, China
| | - Qiu Li
- Department of Nephrology, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders,Children’s Hospital of Chongqing Medical University, Chongqing, China
| | - Mo Wang
- Department of Nephrology, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders,Children’s Hospital of Chongqing Medical University, Chongqing, China
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Zhou J, Sun S, Zhang D, Mao J, Xiao H, Yao Y, Wang F, Yu L, Liu L, Feng C, Li C, Su B, Zhang H, Liu X, Xu K, Ju W, Zhong X, Ding J. Urinary epidermal growth factor predicts complete remission of proteinuria in Chinese children with IgA nephropathy. Pediatr Res 2023. [PMID: 36864281 PMCID: PMC10382307 DOI: 10.1038/s41390-023-02542-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
BACKGROUND This study investigated the association between urinary epidermal growth factor (EGF) and complete remission (CR) of proteinuria in children with IgA nephropathy (IgAN). METHODS We included 108 patients from the Registry of IgA Nephropathy in Chinese Children. The urinary EGF at the baseline and follow-up were measured and normalized by urine creatinine (expressed as uEGF/Cr). The person-specific uEGF/Cr slopes were estimated using linear mixed-effects models for the subset of patients with longitudinal data of uEGF/Cr. Cox models were used to analyze the associations of baseline uEGF/Cr and uEGF/Cr slope with CR of proteinuria. RESULTS Patients with high baseline uEGF/Cr were more likely to achieve CR of proteinuria (adjusted HR 2.24, 95% CI: 1.05-4.79). The addition of high baseline uEGF/Cr on the traditional parameters significantly improved the model fit for predicting CR of proteinuria. In the subset of patients with longitudinal data of uEGF/Cr, high uEGF/Cr slope was associated with a higher likelihood of CR of proteinuria (adjusted HR 4.03, 95% CI: 1.02-15.88). CONCLUSIONS Urinary EGF may be a useful noninvasive biomarker for predicting and monitoring CR of proteinuria in children with IgAN. IMPACT High levels of baseline uEGF/Cr (>21.45 ng/mg) could serve as an independent predictor for CR of proteinuria. The addition of baseline uEGF/Cr on the traditional clinical pathological parameters significantly improved the fitting ability for the prediction of CR of proteinuria. Longitudinal data of uEGF/Cr were also independently associated with CR of proteinuria. Our study provides evidence that urinary EGF may be a useful noninvasive biomarker in the prediction of CR of proteinuria as well as monitoring therapeutic response, thus guiding treatment strategies in clinical practice for children with IgAN.
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Affiliation(s)
- Jianmei Zhou
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Shuzhen Sun
- Department of Pediatric Nephrology and Rheumatism and Immunology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Dongfeng Zhang
- Division of Nephrology, Children's Hospital of Hebei Province, Shijiazhuang, China
| | - Jianhua Mao
- Division of Nephrology, The Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
| | - Huijie Xiao
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Yong Yao
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Fang Wang
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Lichun Yu
- Department of Pediatric Nephrology and Rheumatism and Immunology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Ling Liu
- Division of Nephrology, Children's Hospital of Hebei Province, Shijiazhuang, China
| | - Chunyue Feng
- Division of Nephrology, The Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
| | - Chenglong Li
- Peking University Clinical Research Institute, Peking University First Hospital, Beijing, China
| | - Baige Su
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Hongwen Zhang
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Xiaoyu Liu
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Ke Xu
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Wenjun Ju
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Xuhui Zhong
- Department of Pediatrics, Peking University First Hospital, Beijing, China.
| | - Jie Ding
- Department of Pediatrics, Peking University First Hospital, Beijing, China.
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Tezuka Y, Eguchi-Ishimae M, Ozaki E, Ito T, Ishii E, Eguchi M. Activation of fibroblast growth factor-inducible 14 in the early phase of childhood IgA nephropathy. PLoS One 2021; 16:e0258090. [PMID: 34597335 PMCID: PMC8486145 DOI: 10.1371/journal.pone.0258090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 09/17/2021] [Indexed: 11/23/2022] Open
Abstract
IgA nephropathy (IgAN) is the most common form of glomerulonephritis worldwide. Pediatric patients in Japan are diagnosed with IgAN at an early stage of the disease through annual urinary examinations. Tumor necrosis factor-like weak inducer of apoptosis (TWEAK) and fibroblast growth factor-inducible 14 (Fn14) have various roles, including proinflammatory effects, and modulation of several kidney diseases; however, no reports have described their roles in pediatric IgAN. In this study, we performed pathological and immunohistochemical analyses of samples from 14 pediatric IgAN patients. Additionally, gene expression arrays of glomeruli by laser-captured microdissection were performed in hemi-nephrectomized high serum IgA (HIGA) mice, a model of IgA nephropathy, to determine the role of Fn14. Glomeruli with intense Fn14 deposition were observed in 80% of mild IgAN cases; however, most severe cases showed glomeruli with little or no Fn14 deposition. Fn14 deposition was not observed in obvious mesangial proliferation or the crescent region of glomeruli, but was detected strongly in the glomerular tuft, with an intact appearance. In HIGA mice, Fn14 deposition was observed mildly beginning at 11 weeks of age, and stronger Fn14 deposition was detected at 14 weeks of age. Expression array analysis indicated that Fn14 expression was higher in HIGA mice at 6 weeks of age, increased slightly at 11 weeks, and then decreased at 26 weeks when compared with controls at equivalent ages. These findings suggest that Fn14 signaling affects early lesions but not advanced lesions in patients with IgAN. Further study of the TWEAK/Fn14 pathway will contribute to our understanding of the progression of IgAN.
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Affiliation(s)
- Yuko Tezuka
- Department of Pediatrics, Takamatsu Red Cross Hospital, Takamatsu, Kagawa, Japan
| | | | - Erina Ozaki
- Department of Total Medical Support Center, Ehime University Hospital, Toon, Ehime, Japan
| | - Toshiyuki Ito
- Department of Pediatrics, Takamatsu Red Cross Hospital, Takamatsu, Kagawa, Japan
| | - Eiichi Ishii
- Department of Pediatrics, Takamatsu Red Cross Hospital, Takamatsu, Kagawa, Japan
| | - Mariko Eguchi
- Department of Pediatrics, Takamatsu Red Cross Hospital, Takamatsu, Kagawa, Japan
- Division of Medical Genetics, Ehime University Hospital, Toon, Ehime, Japan
- * E-mail:
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Zhao JL, Wang JJ, Huang GP, Feng CY. Primary IgA nephropathy with nephrotic-range proteinuria in Chinese children. Medicine (Baltimore) 2021; 100:e26050. [PMID: 34032732 PMCID: PMC8154377 DOI: 10.1097/md.0000000000026050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 05/03/2021] [Indexed: 01/10/2023] Open
Abstract
To investigate the clinicopathological features and outcomes of primary IgA nephropathy with nephrotic-range proteinuria in Chinese children. Patients with biopsy-proven IgA nephropathy and nephrotic-range proteinuria between January 2011 and December 2017 were included, and their proteinuria and renal function were followed up. A total of 90 patients were enrolled, and 21.1% (19/90) of them had decreased renal function at diagnosis. Complete remission, partial remission, and no response of proteinuria occurred in 88.6% (70/79), 10.1% (8/79), and 1.3% (1/79), respectively, of the 79 patients who were followed up for 6 to 104 months. 73.7% (14/19) of the patients with decreased renal function at diagnosis recovered to normal level while 26.3% (5/19) of them did not recover or progressed to end-stage renal disease. Two patients with normal renal function at diagnosis progressed to renal insufficiency during follow-up period. By multivariate analysis, the risk for renal function deterioration was significantly higher in the partial remission and no response groups than in the complete remission group. Remission of proteinuria was important for improving renal prognosis in children with IgA nephropathy and nephrotic-range proteinuria. The outcomes for pediatric patients appeared to be better than that reported in adults.
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MESH Headings
- Adolescent
- Biopsy
- Child
- Child, Preschool
- China/epidemiology
- Drug Therapy, Combination/methods
- Female
- Follow-Up Studies
- Glomerular Mesangium/pathology
- Glomerulonephritis, IGA/complications
- Glomerulonephritis, IGA/drug therapy
- Glomerulonephritis, IGA/immunology
- Glomerulonephritis, IGA/pathology
- Glucocorticoids/therapeutic use
- Humans
- Immunosuppressive Agents/therapeutic use
- Kidney Failure, Chronic/diagnosis
- Kidney Failure, Chronic/epidemiology
- Kidney Failure, Chronic/immunology
- Kidney Failure, Chronic/urine
- Male
- Proteinuria/diagnosis
- Proteinuria/epidemiology
- Proteinuria/immunology
- Proteinuria/urine
- Remission Induction/methods
- Retrospective Studies
- Treatment Outcome
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8
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New therapeutic perspectives for IgA nephropathy in children. Pediatr Nephrol 2021; 36:497-506. [PMID: 32040630 DOI: 10.1007/s00467-020-04475-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 01/02/2020] [Accepted: 01/07/2020] [Indexed: 12/20/2022]
Abstract
Childhood IgA nephropathy (cIgAN) differs from the adult by having an abrupt clinical onset, often presenting as an acute attack that can progress to a chronic phase. No treatment guidelines have been established for the treatment of cIgAN. Given the severity of acute attack in children, and the number of life-years at stake, pediatricians prescribe immunosuppression in addition to renin-angiotensin system blockade. Non-specific immunosuppressors, such as corticosteroids, have systemic toxic effects, and given recent therapeutic advances in adult glomerulonephritis, new tailored strategies should be expected for children. The mucosal immune system has been highlighted as a key player in IgAN pathogenesis, and several biomarkers have been identified with a direct role in pathogenesis. In this review, we discuss current studies of conventional and novel therapeutic approaches for cIgAN.
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9
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Trimarchi H, Coppo R. The implications of focal segmental glomerulosclerosis in children with IgA nephropathy. Pediatr Nephrol 2020; 35:2043-2047. [PMID: 31773265 DOI: 10.1007/s00467-019-04414-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 10/30/2019] [Accepted: 10/31/2019] [Indexed: 10/25/2022]
Abstract
Focal segmental glomerular sclerotic lesions in IgA nephropathy (IgAN), considered for years a chronic histologic feature related to proteinuria in remnant nephrons without any active role in the pathogenesis and progression of glomerular damage of IgAN, have been recently reconsidered. The Oxford classification of IgAN reported it as the "S" score and found it to be an independent risk factor for progression of IgAN. Its prognostic value was confirmed also in children. The identification of some histologic subvariants of the S lesion has produced interesting insights into different pathogenetic mechanisms of glomerular damage in IgAN. Tip lesion and podocyte hypertrophy are considered secondary to active podocytopathy and are correlated with higher levels of proteinuria and a faster decline in glomerular filtration rate. Moreover, endocapillary and mesangial hypercellularity might contribute in children with IgAN to formation and progression of S lesions. Considering the pathophysiology of these processes, children with some S features may benefit not only from nephroprotective measures but also from immunosuppression.
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Affiliation(s)
- Hernán Trimarchi
- Nephrology Service, Hospital Británico de Buenos Aires, Perdriel 74 (1280), Buenos Aires, Argentina.
| | - Rosanna Coppo
- Fondazione Ricerca Molinette, Regina Margherita Hospital, Turin, Italy
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10
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Cambier A, Rabant M, El Karoui K, Peuchmaur M, Servais A, Hertig A, Deschenes G, Salomon R, Hogan J, Robert T. Clinical and histological differences between adults and children in new onset IgA nephropathy. Pediatr Nephrol 2020; 35:1897-1905. [PMID: 32444925 DOI: 10.1007/s00467-020-04614-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 05/05/2020] [Accepted: 05/12/2020] [Indexed: 10/24/2022]
Abstract
BACKGROUND Previous reports suggest initial presentation of IgA nephropathy (IgAN) in children is different from adults. No systematic comparison of clinical, biological, and histological childhood- and adult-onset IgAN is currently available. METHODS We compared pediatric and adult clinical and histological characteristics at IgAN diagnosis. Data on 211 consecutive patients from two different centers in Paris (82 children, 129 adults) were reviewed. Kidney biopsies were scored for Oxford classification and podocytopathic (P1) features. RESULTS We report higher eGFR at diagnosis in children compared to adults (89.5 vs. 64 ml/min/1.73 m2; p = 0.0001) but no difference in proteinuria. Histological analysis of kidney biopsy found higher proportions of mesangial (M1) and endocapillary (E1) hypercellularity in children compared with adults (M1 [80.7% vs. 27.9%, p = 0.0001]; E1 [71.3% vs. 30%, p = 0.0001]). Focal glomerulosclerosis (S1), tubular atrophy/interstitial fibrosis ≥ 25% (T1), and P1 were more frequent in adults (S1 [81.5% vs. 61.3%, p = 0.0012], T1 [49.5% vs. 1.35%, p = 0.0001], P1 [33.8% vs. 16.4%, p = 0.008). Proteinuria associated with M1, E1, and C1 in children (M1, p = 0.0001; E1, p = 0.0005; C1, p = 0.0014) but S1, P1, and T1 in adults (S1, p = 0.0001; P1, p = 0.0001; T1, p = 0.001). After steroid treatment (41 children and 28 adults), proteinuria decreased in children (p < 0.001, follow-up 38 months) and adults (p < 0.001, follow-up 76.9 months), whereas eGFR remained stable in adults but increased significantly in children (90.6 to 110 ml/min/1.73m2). CONCLUSION Proteinuria in children with IgAN is a marker of glomerular proliferative lesions whereas its presence in adults often reflects the presence of chronic lesions. This suggests the need for histological assessment.
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Affiliation(s)
- Alexandra Cambier
- Service de néphrologie pédiatrique, APHP, Hôpital Universitaire Robert-Debré, 48 Boulevard Serrurier, 75019, Paris, France.
| | - Marion Rabant
- Service de Pathologie, Hôpital Universitaire Hôpital Necker, APHP, Paris, France
| | - Khalil El Karoui
- Service de néphrologie et transplantation rénale, Hôpital Universitaire Henri-Mondor, Paris, France
| | - Michel Peuchmaur
- Service de Pathologie, Hôpital Universitaire Robert Debré APHP, Paris et Université Diderot, Paris, France
| | - Aude Servais
- Service de néphrologie et transplantation rénale, Hôpital Necker, APHP, Paris, France
| | - Alexandre Hertig
- Service des urgences néphrologiques et transplantation rénales, APHP, Hôpital Universitaire Tenon, Paris, France.,Université Pierre et Marie Curie Paris 6, Paris, France
| | - Georges Deschenes
- Service de néphrologie pédiatrique, APHP, Hôpital Universitaire Robert-Debré, 48 Boulevard Serrurier, 75019, Paris, France
| | - Remi Salomon
- Service de néphrologie pédiatrique, APHP, Hôpital Universitaire Necker, Paris, France
| | - Julien Hogan
- Service de néphrologie pédiatrique, APHP, Hôpital Universitaire Robert-Debré, 48 Boulevard Serrurier, 75019, Paris, France
| | - Thomas Robert
- Centre de néphrologie et transplantation rénale, APHM, Hôpital Universitaire de la Conception, 147 Bd Baille, 13385, Marseille, France.
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11
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Glomerular galactose-deficient IgA1 expression analysis in pediatric patients with glomerular diseases. Sci Rep 2020; 10:14026. [PMID: 32820208 PMCID: PMC7441388 DOI: 10.1038/s41598-020-71101-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 08/10/2020] [Indexed: 01/19/2023] Open
Abstract
Galactose-deficient IgA1 (Gd-IgA1) is important in the pathogenesis of IgA nephropathy (IgAN). A Gd-IgA1-specific monoclonal antibody (KM55) has revealed glomerular Gd-IgA1 deposition solely in patients with IgAN and IgA vasculitis with nephritis (IgAV-N). However, this specificity is controversial and has not been demonstrated in pediatric patients. Here, we conducted double-immunofluorescence staining of IgA and Gd-IgA1 in 60 pediatric patients with various glomerular diseases. We divided patients into four groups: (1) patients with IgAN and IgAV-N (n = 23); (2) patients with immunocomplex-mediated glomerulonephritis accompanied by IgA deposition, including lupus nephritis, membranoproliferative glomerulonephritis, and membranous nephropathy (n = 14); (3) patients with other glomerular diseases involving IgA deposition, including idiopathic nephrotic syndrome (INS), oligomeganephronia, Alport syndrome, dense deposit disease, and crescentic glomerulonephritis (n = 11); and (4) patients with IgA-negative diseases including INS, membranoproliferative glomerulonephritis, membranous nephropathy, oligomeganephronia, Alport syndrome, C3 glomerulonephritis, poststreptococcal acute glomerulonephritis, and hemolytic uremic syndrome (n = 12). KM55 staining revealed Gd-IgA1-positive findings in 23/23 patients in Group 1 and 13/14 patients in Group 2, but not in patients in Groups 3 or 4. Therefore, KM55 may detect incidental IgA deposition in pediatric patients. Gd-IgA1 may be involved in the pathogenesis of these immune-related diseases; alternatively, KM55 may recognize IgA-related immunocomplexes in a non-specific manner.
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12
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Mastrangelo A, Serafinelli J, Giani M, Montini G. Clinical and Pathophysiological Insights Into Immunological Mediated Glomerular Diseases in Childhood. Front Pediatr 2020; 8:205. [PMID: 32478016 PMCID: PMC7235338 DOI: 10.3389/fped.2020.00205] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 04/03/2020] [Indexed: 11/13/2022] Open
Abstract
The kidney is often the target of immune system dysregulation in the context of primary or systemic disease. In particular, the glomerulus represents the anatomical entity most frequently involved, generally as the expression of inflammatory cell invasion or circulant or in situ immune-complex deposition. Glomerulonephritis is the most common clinical and pathological manifestation of this involvement. There are no universally accepted classifications for glomerulonephritis. However, recent advances in our understanding of the pathophysiological mechanisms suggest the assessment of immunological features, biomarkers, and genetic analysis. At the same time, more accurate and targeted therapies have been developed. Data on pediatric glomerulonephritis are scarce and often derived from adult studies. In this review, we update the current understanding of the etiologic events and genetic factors involved in the pathogenesis of pediatric immunologically mediated primitive forms of glomerulonephritis, together with the clinical spectrum and prognosis. Possible new therapeutic targets are also briefly discussed.
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Affiliation(s)
- Antonio Mastrangelo
- Pediatric Nephrology, Dialysis and Transplant Unit, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - Jessica Serafinelli
- Pediatric Nephrology, Dialysis and Transplant Unit, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - Marisa Giani
- Pediatric Nephrology, Dialysis and Transplant Unit, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - Giovanni Montini
- Pediatric Nephrology, Dialysis and Transplant Unit, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
- Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
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13
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Risk factor for persistent proteinuria in adulthood after clinical remission in Japanese children with immunoglobulin A nephropathy: impact of tonsillectomy combined with intravenous pulse methylprednisolone. Clin Exp Nephrol 2020; 24:734-735. [PMID: 32239301 DOI: 10.1007/s10157-020-01877-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 03/12/2020] [Indexed: 10/24/2022]
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14
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Chen CC, Chou HH, Chiou YY. Factors associated with long-term progression of pediatric chronic kidney disease of nonglomerular etiologies. J Formos Med Assoc 2019; 118:1423-1429. [PMID: 30616992 DOI: 10.1016/j.jfma.2018.12.016] [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: 04/30/2018] [Revised: 11/26/2018] [Accepted: 12/20/2018] [Indexed: 10/27/2022] Open
Abstract
BACKGROUND/PURPOSE The aims of this study were to determine the long-term associated factors for chronic kidney disease (CKD) progression in a pediatric group with non-glomerular (non-GN) etiologies. METHODS Pediatric patients with a presumptive diagnosis of CKD were enrolled to this study. Recorded information included demographic and laboratory information. We included the patients with non-GN etiologies and investigated the factors including systolic and diastolic blood pressure (BP), proteinuria, and anemia status in association with reductions in the estimated glomerular filtration rate (eGFR). RESULTS A total of 308 children were enrolled and the mean duration of follow-up was 4.40 ± 3.53 years. Median baseline age was 5 years old and the males represented 55% of all patients. One-unit increased baseline systolic BP z-score was associated with 1.2 ml/min per 1.73 m2 (95% CI = -2 to -0.5) faster rate of eGFR decline. The presence of baseline proteinuria and anemia were also associated with 4.1 ml/min per 1.73 m2 (95% CI = -5.7 to -2.5) and 2.2 ml/min per 1.73 m2 (95% CI = -3.6 to -0.8) more rapid eGFR declination, respectively. Hypertension, anemia and proteinuria during the follow-up were also associated with 3.25 ml/min per 1.73 m2 (95% CI = -5.32 to -1.18), 4.34 ml/min per 1.73 m2 (95% CI = -7.25 to -1.43) and 4.97 ml/min per 1.73 m2 (95% CI = -8.23 to -1.71) more rapid eGFR declination, respectively. CONCLUSION Elevated systolic BP, proteinuria, and anemia are independently associated with CKD progression in pediatric patients with non-GN etiologies.
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Affiliation(s)
- Chih-Chia Chen
- Department of Pediatrics, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
| | - Hsin-Hsu Chou
- Department of Pediatrics, Ditmanson Medical Foundation Chiayi Christian Hospital, Chia-Yi, Taiwan.
| | - Yuan-Yow Chiou
- Department of Pediatrics, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Institute of Clinical Medicine, National Cheng-Kung University Hospital, College of Medicine, Tainan, Taiwan.
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15
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Korolj A, Laschinger C, James C, Hu E, Velikonja C, Smith N, Gu I, Ahadian S, Willette R, Radisic M, Zhang B. Curvature facilitates podocyte culture in a biomimetic platform. LAB ON A CHIP 2018; 18:3112-3128. [PMID: 30264844 DOI: 10.1039/c8lc00495a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Most kidney diseases begin with abnormalities in glomerular podocytes, motivating the need for podocyte models to study pathophysiological mechanisms and new treatment options. However, podocytes cultured in vitro face a limited ability to maintain appreciable extents of differentiation hallmarks, raising concerns over the relevance of study results. Many key properties such as nephrin expression and morphology reach plateaus that are far from the in vivo levels. Here, we demonstrate that a biomimetic topography, consisting of microhemispheres arrayed over the cell culture substrate, promotes podocyte differentiation in vitro. We define new methods for fabricating microscale curvature on various substrates, including a thin porous membrane. By growing podocytes on our topographic substrates, we found that these biophysical cues augmented nephrin gene expression, supported full-size nephrin protein expression, encouraged structural arrangement of F-actin and nephrin within the cell, and promoted process formation and even interdigitation compared to the flat substrates. Furthermore, the topography facilitated nephrin localization on curved structures while nuclei lay in the valleys between them. The improved differentiation was also evidenced by tracking barrier function to albumin over time using our custom topomembranes. Overall, our work presents accessible methods for incorporating microcurvature on various common substrates, and demonstrates the importance of biophysical stimulation in supporting higher-fidelity podocyte cultivation in vitro.
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Affiliation(s)
- Anastasia Korolj
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Canada.
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Xu Y, Ling Y, Yang F, Deng J, Rong L, Jiang M, Jiang X. The mTOR/p70S6K1 signaling pathway in renal fibrosis of children with immunoglobulin A nephropathy. J Renin Angiotensin Aldosterone Syst 2018; 18:1470320317717831. [PMID: 28685619 PMCID: PMC5843880 DOI: 10.1177/1470320317717831] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Aim: The purpose of this study was to explore whether mTOR/p70S6K1 signaling is activated in renal fibrosis of immunoglobulin A nephropathy. Methods: Seventy-two children with immunoglobulin A nephropathy were divided into three groups according to their clinical features and pathological grades. Six normal renal specimens were included in the control group. The expression levels of angiotensin II, mTOR, p70S6K1, E-cadherin, and α-smooth muscle actin in renal tissues were determined by immunohistochemistry method, the potential correlations of these indexes and relationship between these indexes and the clinicopathological indexes were analyzed. Results: Compared to the control group, the expression levels of angiotensin II, mTOR, p70S6K1, and α-smooth muscle actin were significantly higher and the expression levels of E-cadherin were lower both in glomeruli and tubulointerstitium of immunoglobulin A nephropathy children. And the most significant differences were found in the nephrotic syndrome group and pathological grade IV group. In immunoglobulin A nephropathy renal tissues, the expression levels of angiotensin II in glomeruli and tubulointerstitium were both positively correlated with the expression levels of mTOR and α- smooth muscle actin, and negatively correlated with the expression levels of E-cadherin. Conclusion: The mTOR/p70S6K1 signaling was activated in renal tissues of children with immunoglobulin A nephropathy, and future studies will need to address the mechanism of mTOR/p70S6K1 signaling in the progress of renal fibrosis in immunoglobulin A nephropathy.
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Affiliation(s)
- Yuanyuan Xu
- Department of Pediatrics, The First Affiliated Hospital of Sun Yat-sen University, P.R. China
| | - Yihong Ling
- Department of Pathology, Sun Yat-sen University Cancer Center, P.R. China
| | - Fan Yang
- Department of Pediatrics, The First Affiliated Hospital of Sun Yat-sen University, P.R. China
| | - Jiong Deng
- Department of Pediatrics, The First Affiliated Hospital of Sun Yat-sen University, P.R. China
| | - Liping Rong
- Department of Pediatrics, The First Affiliated Hospital of Sun Yat-sen University, P.R. China
| | - Mengjie Jiang
- Department of Pediatrics, The First Affiliated Hospital of Sun Yat-sen University, P.R. China
| | - Xiaoyun Jiang
- Department of Pediatrics, The First Affiliated Hospital of Sun Yat-sen University, P.R. China
- Xiaoyun Jiang, Department of Pediatrics, the First Affiliated Hospital of Sun Yat-sen University, No. 58, Zhongshan Road 2,Yuexiu District, Guangzhou, P.R. China.
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Cambier A, Rabant M, Peuchmaur M, Hertig A, Deschenes G, Couchoud C, Kolko A, Salomon R, Hogan J, Robert T. Immunosuppressive Treatment in Children With IgA Nephropathy and the Clinical Value of Podocytopathic Features. Kidney Int Rep 2018; 3:916-925. [PMID: 29988999 PMCID: PMC6035143 DOI: 10.1016/j.ekir.2018.03.013] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 02/27/2018] [Accepted: 03/22/2018] [Indexed: 11/25/2022] Open
Abstract
Introduction There is a need for treatment guidelines and prognostic factor identification in children with primary IgA nephropathy. We analyzed the causative effect of steroids and the applicability of the Oxford classification. Methods A total of 82 consecutive children (mean 10.6 years; median follow-up 3.3 years) were reviewed; 21 patients (25.6%) presented with acute kidney injury, and 6 (7.3%) with nephrotic syndrome. Renal biopsies were scored for Oxford classification and podocytopathic features in 2 groups: a group treated with steroid therapy (some in association with cyclophosphamide) and supportive care (renin angiotensin system blockade) and a group treated by supportive care alone. Results The 2 groups were not comparable because baseline clinical data were different. Estimated glomerular filtration rate (eGFR) in immunosupressive group significantly improved between M0 (at onset) and M6 (6 months after treatment) from 89.9 [61.2–114.5] to 110.5 [93.7–120] ml/min per 1.73 m2, P < 0.001. Proteinuria also significantly decreased from (1.6 [1–4.3] to 0.3 [0.2–0.7] g/g, P < 0.001). In the supportive care group, eGFR and proteinuria remained stable. Podocytopathic features were predictive of renal function decline by univariable (−4.9 ± 14.9 ml/min per 1.73 m2, P = 0.0079) and multivariable analysis and of poor renal prognosis to a combined event (renal function impairment more than 10% of the eGFR baseline or chronic kidney disease stage 3 at 6 months) in univariable analysis. MEST-C score failed to prove its prognostic value. Conclusion Immunosuppressive treatment, especially steroid therapy, seems beneficial in children with glomerular inflammation and proliferation. The Oxford classification does not appear to be entirely appropriate in predicting long-term renal prognosis for children, whereas the characteristics of podocytopathy are strongly predictive of renal prognosis.
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Affiliation(s)
- Alexandra Cambier
- Pediatric Department of Nephrology and Transplantation, APHP, Hôpital Robert-Debré, Paris, France
| | - Marion Rabant
- Service de Pathologie, Hôpital Universitaire Hôpital Necker APHP, Paris, France
| | - Michel Peuchmaur
- Service de Pathologie, Hôpital Universitaire Robert-Debré APHP, Paris et Université Diderot, Paris 7, France
| | - Alexandre Hertig
- Department of Nephrology, Transplantation and Emergency, APHP, Hôpital Tenon, Paris, France
- Université Pierre et Marie Curie Paris 6, Paris, France
| | - Georges Deschenes
- Pediatric Department of Nephrology and Transplantation, APHP, Hôpital Robert-Debré, Paris, France
| | - Cecile Couchoud
- Renal Epidemiology and Information Network Registry, Agence de la biomédecine, Saint-Denis la Plaine, France
| | | | - Remi Salomon
- Pediatric Department of Nephrology and Transplantation, APHP, Hôpital Necker, Paris, France
| | - Julien Hogan
- Pediatric Department of Nephrology and Transplantation, APHP, Hôpital Robert-Debré, Paris, France
| | - Thomas Robert
- Department of Nephrology, Transplantation and Emergency, APHP, Hôpital Tenon, Paris, France
- Université Pierre et Marie Curie Paris 6, Paris, France
- Department of Nephrology and Transplantation, APHM, Hôpital Universitaire de la Conception, Marseille, France
- Correspondence: Thomas Robert, Centre de néphrologie et transplantation rénale, APHM, Hôpital de la Conception, 147 Bd baille, 13385, Marseille, France.
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18
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Abstract
Immunoglobulin A nephropathy (IgAN) is the most frequently occurring primary glomerulonephritis in Caucasian and Asian populations. Nonetheless, therapeutic recommendations are based on weak evidence, large controlled trials are scarce and, in particular, the additional value of immunosuppression beyond comprehensive supportive measures is not well-established. The use of immunosuppressants is supported by experimental insights into IgAN pathogenesis that suggest an autoimmune component in disease development. The so-called "multi-hit" theory comprises multiple steps, starting with defective glycosylation of IgA subclass IgA1 that results in overproduction of galactose-deficient IgA1 (Gd-IgA1), occurrence of anti-Gd-IgA1 autoantibodies, and mesangial deposition of nephritogenic immune complexes. This eventually results in an increased mesangial cell proliferation, inflammatory responses, and complement activation. Recent genome-wide association studies have identified several susceptibility genes, many of which support the "multi-hit" concept. In light of these discoveries, it is astonishing that the vast majority of adult IgAN patients obviously do not need and/or benefit from immunosuppressive therapies in the first place. In fact, a number of supportive measures are highly effective in reducing the risk for disease progression in many patients. These measures need to be optimized before immunosuppression should be considered at all. In this review we focus on the underlying pathogenetic cornerstones and the central question of whether systemic inflammation in adult IgAN patients should be treated. Treatment options in children with IgAN are also discussed.
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Lee KY. A unified pathogenesis for kidney diseases, including genetic diseases and cancers, by the protein-homeostasis-system hypothesis. Kidney Res Clin Pract 2017; 36:132-144. [PMID: 28680821 PMCID: PMC5491160 DOI: 10.23876/j.krcp.2017.36.2.132] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 12/20/2016] [Accepted: 02/02/2017] [Indexed: 12/14/2022] Open
Abstract
Every cell of an organism is separated and protected by a cell membrane. It is proposed that harmony between intercellular communication and the health of an organism is controlled by a system, designated the protein-homeostasis-system (PHS). Kidneys consist of a variety of types of renal cells, each with its own characteristic cell-receptor interactions and producing characteristic proteins. A functional union of these renal cells can be determined by various renal function tests, and harmonious intercellular communication is essential for the healthy state of the host. Injury to a kind of renal cells can impair renal function and induce an imbalance in total body health. Every acute or chronic renal disease has unknown etiologic substances that are responsible for renal cell injury at the molecular level. The immune/repair system of the host should control the etiologic substances acting against renal cells; if this system fails, the disease progresses to end stage renal disease. Each renal disease has its characteristic pathologic lesions where immune cells and immune proteins, such as immunoglobulins and complements, are infiltrated. These immune cells and immune proteins may control the etiologic substances involved in renal pathologic lesions. Also, genetic renal diseases and cancers may originate from a protein deficiency or malfunctioning protein under the PHS. A unified pathogenesis for renal diseases, including acute glomerulonephritis, idiopathic nephrotic syndrome, immunoglobulin A nephropathy, genetic renal diseases such as Alport syndrome, and malignancies such as Wilms tumor and renal cell carcinoma, is proposed using the PHS hypothesis.
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Affiliation(s)
- Kyung-Yil Lee
- Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul, Korea.,Department of Pediatrics, The Catholic University of Korea, Daejeon St. Mary's Hospital, Daejeon, Korea
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Fathallah-Shaykh SA. Proteinuria and progression of pediatric chronic kidney disease: lessons from recent clinical studies. Pediatr Nephrol 2017; 32:743-751. [PMID: 27350622 DOI: 10.1007/s00467-016-3448-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Revised: 06/09/2016] [Accepted: 06/10/2016] [Indexed: 12/29/2022]
Abstract
Proteinuria in children with chronic kidney disease (CKD) is common and its etiology differs from that in adults. How proteinuria influences the rate of progression of CKD has been analyzed in multiple retrospective clinical studies and more recently in a few prospective ones. In this review I summarize the results, strengths and weaknesses of each of these studies. The findings of several retrospective studies in children with CKD have confirmed what we have learned from adult studies on the association between proteinuria and worsening kidney function. Larger prospective clinical studies have examined the effects of proteinuria on the rate of decline of kidney function and the risk of end-stage kidney disease. They have also considered children with glomerular and, more importantly, the more common, congenital causes of CKD. Current studies have important strengths but also a few weaknesses that limit the validity of the conclusions which can be drawn. There is still a need for large clinical trials that focus primarily on studying the influence of proteinuria on kidney function and on finding remedies that delay progression.
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Affiliation(s)
- Sahar A Fathallah-Shaykh
- Department of Pediatrics, Division of Nephrology, University of Alabama at Birmingham, 516 Lowder Building, 1600 7th Avenue South, Birmingham, AL, 35233, USA.
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Yang JK, Wang YY, Liu C, Shi TT, Lu J, Cao X, Yang FY, Feng JP, Chen C, Ji LN, Xu A. Urine Proteome Specific for Eye Damage Can Predict Kidney Damage in Patients With Type 2 Diabetes: A Case-Control and a 5.3-Year Prospective Cohort Study. Diabetes Care 2017; 40:253-260. [PMID: 27903615 DOI: 10.2337/dc16-1529] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 11/16/2016] [Indexed: 02/03/2023]
Abstract
OBJECTIVE The predictive value of microalbuminuria (MAU) for kidney damage is limited in type 2 diabetes (T2D). We studied whether a urine proteome specific for sight-threatening proliferative diabetic retinopathy (PDR) is an indicator to predict chronic renal insufficiency (CRI) in patients with T2D. RESEARCH DESIGN AND METHODS A shotgun urine proteomic analysis was performed in patients with MAU and PDR (case subjects) and in patients with MAU and a duration of T2D for >10 years but without any degree of retinopathy (control subjects). In the cohort study, 210 patients with T2D with an estimated glomerular filtration rate (eGFR) ≥80 mL/min/1.73 m2 were followed for a median of 5.3 years. Urine proteins specific for PDR were used for predicting CRI (eGFR <60 mL/min/1.73 m2). RESULTS The top two urine proteins with the highest difference in ratio of case subjects to control subjects were haptoglobin (8.7 times; P < 0.0001) and α-2-macroglobulin (5.7 times; P < 0.0001). In the cohort study, patients with baseline urinary haptoglobin ≥20 ng/min (haptoglobinuria) had a higher incidence of CRI than those without (hazard ratio [95% CI] 3.27 [1.41-7.58]; P = 0.006). The overall CRI rate was 3.2% for patients without haptoglobinuria or MAU, 9.5% for those with MAU, and 13.3% for those with haptoglobinuria. The highest rate for CRI (22.4%) was in patients with both MAU and haptoglobinuria (P < 0.001). CONCLUSIONS Urine haptoglobin, which is specific for PDR, is a novel biomarker and complement to urine albumin for predicting kidney damage in patients with T2D.
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Affiliation(s)
- Jin-Kui Yang
- Beijing Key Laboratory of Diabetes Research and Care, Department of Endocrinology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Ying-Ying Wang
- Beijing Key Laboratory of Diabetes Research and Care, Department of Endocrinology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Chang Liu
- Beijing Key Laboratory of Diabetes Research and Care, Department of Endocrinology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Ting-Ting Shi
- Beijing Key Laboratory of Diabetes Research and Care, Department of Endocrinology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Jing Lu
- Beijing Key Laboratory of Diabetes Research and Care, Department of Endocrinology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Xi Cao
- Beijing Key Laboratory of Diabetes Research and Care, Department of Endocrinology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Fang-Yuan Yang
- Beijing Key Laboratory of Diabetes Research and Care, Department of Endocrinology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Jian-Ping Feng
- Beijing Key Laboratory of Diabetes Research and Care, Department of Endocrinology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Chen Chen
- School of Biomedical Sciences, University of Queensland, Brisbane, Queensland, Australia
| | - Li-Nong Ji
- Endocrinology and Metabolism Department, Peking University People's Hospital, Beijing, China
| | - Aimin Xu
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Medicine, University of Hong Kong, Hong Kong
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Clinical and histological risk factors for progression of IgA nephropathy: an update in children, young and adult patients. J Nephrol 2016; 30:339-346. [PMID: 27815919 DOI: 10.1007/s40620-016-0360-z] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2016] [Accepted: 10/21/2016] [Indexed: 01/13/2023]
Abstract
The identification of risk factors conditioning the progression of immunoglobulin (Ig)A nephropathy (IgAN) is needed due to the variability of the outcome of this renal disease, which ranges from remission or indolent course to progressive slow loss of renal function or rapidly evolving chronic renal failure. Based on the supposed individual risk of progression, the therapy is modulated from renin-angiotensin inhibitors to corticosteroids, alone or associated with other powerful but potentially harmful immunosuppressors. Over the last 20 years, several studies have produced great advances in the field of biomarkers for detecting risk factors that play a role in the progression of IgAN. This review will focus on the clinical and histological risk factors which have been detected and validated by the majority of the studies and which may presently be considered of value for prognostication of outcome in patients with IgAN, driving the individual treatment choice.
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