{"title":"Correction to: Management of adult patients with podocytopathies: an update from the ERA Immunonephrology Working Group.","authors":"","doi":"10.1093/ndt/gfae215","DOIUrl":"10.1093/ndt/gfae215","url":null,"abstract":"","PeriodicalId":19078,"journal":{"name":"Nephrology Dialysis Transplantation","volume":" ","pages":"1260"},"PeriodicalIF":4.8,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12123302/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142350765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Seasonal variations in the association between proteinuria and kidney failure.","authors":"Takayuki Kawaoka, Yusuke Sakaguchi, Tatsufumi Oka, Yuta Asahina, Koki Hattori, Yohei Doi, Nobuhiro Hashimoto, Yasuo Kusunoki, Satoko Yamamoto, Masafumi Yamato, Ryohei Yamamoto, Isao Matsui, Masayuki Mizui, Jun-Ya Kaimori, Yoshitaka Isaka","doi":"10.1093/ndt/gfae278","DOIUrl":"10.1093/ndt/gfae278","url":null,"abstract":"<p><strong>Background and hypothesis: </strong>Proteinuria exhibits seasonal fluctuations, decreasing in summer and increasing in winter. It is unknown whether the association between proteinuria and the risk of kidney failure varies by season.</p><p><strong>Methods: </strong>The Osaka Consortium for Kidney Disease Research (OCKR) database contained retrospective data from 15 367 patients with estimated glomerular filtration rates of 10-60 mL/min/1.73 m2, who were referred to the Department of Nephrology at five clinical centers in Japan, between 2010 and 2021. Multivariate Cox models were used to examine the associations of urinary protein-to-creatinine ratio (UPCR) in summer (UPCRsummer) and winter (UPCRwinter), with kidney failure defined as initiation of kidney replacement therapy. LASSO was used to compare the strength of the association between UPCRsummer and UPCRwinter with respect to kidney failure. We also assessed whether seasonal fluctuations in UPCR were associated with kidney failure.</p><p><strong>Results: </strong>The median (interquartile range) UPCRwinter was 0.89 (0.22, 2.69) g/gCre, 46% higher than UPCRsummer [0.61 (0.16, 1.87) g/gCre]. During a median follow-up of 3.0 years, 1585 patients developed kidney failure. In time-dependent Cox models, UPCRwinter showed a higher hazard of kidney failure [1.66 per 1-standard deviation (SD) increase; 95% confidence interval (CI) 1.60-1.73] than UPCRsummer (1.45 per 1-SD increase; 95% CI 1.41-1.48). LASSO identified that UPCRwinter was more strongly associated with kidney failure than UPCRsummer. Furthermore, higher percentage changes in UPCRwinter relative to UPCRsummer was associated with a higher hazard of kidney failure.</p><p><strong>Conclusions: </strong>Proteinuria in winter exhibited stronger associations with kidney failure than that in summer. Seasonal fluctuations in UPCR should not be overlooked in the management of chronic kidney disease to make reasonable clinical decisions.</p>","PeriodicalId":19078,"journal":{"name":"Nephrology Dialysis Transplantation","volume":" ","pages":"1234-1242"},"PeriodicalIF":4.8,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142687712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"IL-12/23 blocker ustekinumab for the treatment of ANCA-associated glomerulonephritis.","authors":"Jonas Engesser, Christian F Krebs, Ulf Panzer","doi":"10.1093/ndt/gfaf005","DOIUrl":"10.1093/ndt/gfaf005","url":null,"abstract":"","PeriodicalId":19078,"journal":{"name":"Nephrology Dialysis Transplantation","volume":" ","pages":"1066-1068"},"PeriodicalIF":4.8,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142979337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Amber de Haan, Mark Eijgelsheim, Liffert Vogt, Ewout J Hoorn, Joris I Rotmans, Gijs Fortrie, Roos F J Marsman, Tonia C Rothuizen, H Siebe Spijker, Laura R Claus, Constantijn J A M Konings, Femke Waanders, Joan Doornebal, Andrea B Kramer, Aaltje Y Adema, Bert van der Zwaag, Albertien M van Eerde, Nine V A M Knoers, Martin H de Borst
{"title":"Genetic testing in a national cohort of adults with chronic kidney disease of unknown origin.","authors":"Amber de Haan, Mark Eijgelsheim, Liffert Vogt, Ewout J Hoorn, Joris I Rotmans, Gijs Fortrie, Roos F J Marsman, Tonia C Rothuizen, H Siebe Spijker, Laura R Claus, Constantijn J A M Konings, Femke Waanders, Joan Doornebal, Andrea B Kramer, Aaltje Y Adema, Bert van der Zwaag, Albertien M van Eerde, Nine V A M Knoers, Martin H de Borst","doi":"10.1093/ndt/gfae270","DOIUrl":"10.1093/ndt/gfae270","url":null,"abstract":"<p><strong>Background: </strong>Chronic kidney disease (CKD) remains unexplained in at least 20% of patients. Massively parallel sequencing (MPS) can be a valuable diagnostic tool in patients with unexplained CKD, but prospective data from routine clinical practice are limited. We aimed to determine the diagnostic yield and relevance of MPS-based gene panel testing in patients with unexplained CKD in a real-world context. We additionally examined barriers to implementation of genetic testing.</p><p><strong>Methods: </strong>In this prospective cohort study, we recruited patients with unexplained CKD (estimated glomerular filtration rate <60 ml/min/1.73 m2 without underlying clinical diagnosis) with onset at <50 years of age who underwent MPS-based multigene panel testing from 11 academic and non-academic hospitals across the Netherlands. In patients with a (likely) pathogenic variant, we verified that the variant likely explained the clinical phenotype. A nationwide online survey was sent to all Dutch nephrologists and residents to investigate potential barriers for gene panel testing.</p><p><strong>Results: </strong>A diagnostic variant was identified in 59/340 participants (17%). Most common diagnostic variants were in NPHP1 (13 patients), COL4A3 (12 patients), COL4A4 (5 patients), COL4A5 (6 patients) and PAX2 (5 patients). A genetic diagnosis led to at least one clinical consequence in 73% of patients. Main barriers reported by Dutch nephrologists (N = 71) included genetic illiteracy (53%), difficulties with test selection (51%) and a lack of time (43%).</p><p><strong>Conclusions: </strong>MPS-based multigene panel testing yielded a genetic diagnosis in 17% of patients with unexplained CKD. Our findings support the relevance of MPS in the diagnostic workup of adults with unexplained CKD with onset at <50 years of age. Additionally, our results underline the need to improve genetic education among nephrologists to better the implementation of MPS-based diagnostic testing in clinical practice.</p>","PeriodicalId":19078,"journal":{"name":"Nephrology Dialysis Transplantation","volume":" ","pages":"1225-1233"},"PeriodicalIF":4.8,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142676213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Long-term outcomes of IgA nephropathy in China.","authors":"Xue Shen, Pei Chen, Muqing Liu, Lijun Liu, Sufang Shi, Xujie Zhou, Jicheng Lv, Hong Zhang","doi":"10.1093/ndt/gfae252","DOIUrl":"10.1093/ndt/gfae252","url":null,"abstract":"<p><strong>Background: </strong>The long-term prognosis of immunoglobulin A nephropathy (IgAN) and the optimal target for proteinuria treatment remain controversial. This study, utilizing a large prospective cohort from China, aims to assess the long-term outcomes of IgAN and to explore the definition of proteinuria remission.</p><p><strong>Methods: </strong>We enrolled 2141 patients with biopsy-proven IgAN, all with at least 12 months of follow-up, from a prospective IgAN cohort at Peking University First Hospital. We utilized Kaplan-Meier analysis, Cox regression and an estimated glomerular filtration rate (eGFR) slope calculated via a linear mixed model to investigate kidney outcomes.</p><p><strong>Results: </strong>The median (Q1, Q3) baseline proteinuria was 1.26 (0.65, 2.40) g/day, and the eGFR was 80 (52, 103) mL/min/1.73 m2. After a mean follow-up of 5.8 (±4.4) years, 509 (24%) patients progressed to end-stage kidney disease (ESKD). The median kidney survival time was 12.4 years, the annual event rate of ESKD was 41.1 per 1000 person-years and the 15-year kidney survival rate was 40%. Time-averaged proteinuria level was strongly associated with kidney failure (adjusted hazard ratio 1.76, 95% confidence interval 1.65 to 1.88). Restriction cubic spline analysis indicated that the risk of ESKD increases rapidly when time-average proteinuria exceeded 0.5 g/day. There was no significant difference in long-term kidney survival between patients with proteinuria <0.3 g/day and those with 0.3-0.5 g/day, with both groups demonstrating a better prognosis.</p><p><strong>Conclusion: </strong>The long-term outcomes for patients with IgAN under current treatment strategies remain poor, with most progressing to ESKD within 15 years. Patients with time-averaged proteinuria ≥0.5 g/day experience worse kidney outcomes, challenging the previous view that proteinuria <1.0 g/day was associated with a low risk of kidney failure.</p>","PeriodicalId":19078,"journal":{"name":"Nephrology Dialysis Transplantation","volume":" ","pages":"1137-1146"},"PeriodicalIF":4.8,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142668486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
David Randall, Asil Alsam, Julius Kieswich, Susan Joseph, Joseph Aduse-Opoku, Jonathan Swann, Alan Boyde, Graham Davis, David Mills, Kieran McCafferty, Michael Curtis, Muhammed M Yaqoob
{"title":"Oral dysbiosis initiates periodontal disease in experimental kidney disease.","authors":"David Randall, Asil Alsam, Julius Kieswich, Susan Joseph, Joseph Aduse-Opoku, Jonathan Swann, Alan Boyde, Graham Davis, David Mills, Kieran McCafferty, Michael Curtis, Muhammed M Yaqoob","doi":"10.1093/ndt/gfae266","DOIUrl":"10.1093/ndt/gfae266","url":null,"abstract":"<p><strong>Background and hypothesis: </strong>It is presently unclear why there is a high prevalence of periodontal disease in individuals living with chronic kidney disease. Whilst some have argued that periodontal disease causes chronic kidney disease, we hypothesized that alterations in saliva and the oral microenvironment in organisms with kidney disease may initiate periodontal disease by causing dysbiosis of the oral microbiota.</p><p><strong>Methods: </strong>Experimental kidney disease was created using adenine feeding and subtotal nephrectomy in rats, and by adenine feeding in mice. Loss of periodontal bone height was assessed using a dissecting microscope supported by micro-CT, light, confocal and electron microscopy, and immunohistochemistry. Salivary biochemistry was assessed using NMR spectroscopy. The oral microbiome was evaluated using culture-based and molecular methods, and the transmissibility of dysbiosis was assessed using co-caging and microbial transfer experiments into previously germ-free recipient mice.</p><p><strong>Results: </strong>We demonstrate that experimental kidney disease causes a reproducible reduction of alveolar bone height, without gingival inflammation or overt hyperparathyroidism but with evidence of failure of bone formation at the periodontal crest. We show that kidney disease alters the biochemical composition of saliva and induces progressive dysbiosis of the oral microbiota, with microbial samples from animals with kidney disease displaying reduced overall bacterial growth, increased alpha diversity, reduced abundance of key components of the healthy oral microbiota such as Streptococcus and Rothia, and an increase in minor taxa including those from gram-negative phyla Proteobacteria and Bacteroidetes. Co-housing diseased rats with healthy ones ameliorates the periodontal disease phenotype, whilst transfer of oral microbiota from mice with kidney disease causes periodontal disease in germ-free animals with normal kidney function.</p><p><strong>Conclusions: </strong>We advocate that periodontal disease should be regarded as a complication of kidney disease, initiated by oral dysbiosis through mechanisms independent of overt inflammation or hyperparathyroidism.</p>","PeriodicalId":19078,"journal":{"name":"Nephrology Dialysis Transplantation","volume":" ","pages":"1187-1202"},"PeriodicalIF":4.8,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12123317/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142682460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yang Yang, Deyang Kong, Meihan Chen, Jiayi Lv, Jie Zhou, Cheng Xue, Shuwei Song, Minghui Song, Lu Ma, Zhiguo Mao, Changlin Mei
{"title":"Monocyte/macrophage pyroptosis and C5b-9-induced cyst enlargement in Pkd1-/- mice.","authors":"Yang Yang, Deyang Kong, Meihan Chen, Jiayi Lv, Jie Zhou, Cheng Xue, Shuwei Song, Minghui Song, Lu Ma, Zhiguo Mao, Changlin Mei","doi":"10.1093/ndt/gfae262","DOIUrl":"10.1093/ndt/gfae262","url":null,"abstract":"<p><strong>Background and hypothesis: </strong>The levels of C5b-9, terminal products of complement activation, were significantly elevated in autosomal dominant polycystic kidney disease (ADPKD). However, the precise mechanisms by which C5b-9 facilitates cyst growth remain incompletely elucidated.</p><p><strong>Methods: </strong>Three groups of chronic-onset Pkd1-/- mice were established: one group received intravenous injections of 0.5 mg/kg C5b-9, another was administered 1.0 mg/kg monoclonal anti-C9 antibodies, and a control group received 1 mg/kg IgG isotype control. All treatments were administered biweekly for two months (postnatal day 180-240). Renal macrophages from distinct subsets were sorted using fluorescence-activated cell sorting. To deplete macrophages, liposome clodronate was injected intraperitoneally. Sublethal irradiation followed by bone marrow reconstruction was performed in Pkd1-/- mice to evaluate the role of bone marrow-derived macrophages (BMDMs) in ADPKD progression.</p><p><strong>Results: </strong>(i) In vitro, sublytic C5b-9 did not affect the viability of renal tubular epithelial cells, but significantly induced M1-like polarization and pyroptosis of BMDMs. (ii) In vivo, C5b-9 notably triggered pyroptosis of Ly6C+ monocytes and a reduction in circulating monocyte numbers as cysts enlarged. (iii) Residual Ly6C+ monocytes infiltrated renal tissues and differentiated into Ly6C+ macrophages, which exhibited a greater susceptibility to pyroptosis compared to Ly6C- macrophages. (iv) Although limited evidence has recently suggested that Ly6C- monocytes may also be affected by C5b-9, upregulation of CCR2 in Ly6C- macrophages was observed in C5b-9-treated Pkd1-/- mice, implying that Ly6C- monocytes could represent a significant source of M2 macrophages.</p><p><strong>Conclusions: </strong>C5b-9 infusion promoted renal tubular epithelial cell proliferation by inducing pyroptosis of Ly6C+ monocytes/macrophages, contributing to progressive cyst enlargement in chronic-onset PKD mice.</p>","PeriodicalId":19078,"journal":{"name":"Nephrology Dialysis Transplantation","volume":" ","pages":"1161-1174"},"PeriodicalIF":4.8,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142624549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Modelling heterogeneity in the progression of chronic kidney disease.","authors":"Elena Butz, Ulla T Schultheiss, Peggy Sekula","doi":"10.1093/ndt/gfae288","DOIUrl":"10.1093/ndt/gfae288","url":null,"abstract":"<p><p>Cohort studies with comprehensive follow-up periods that track patients with chronic kidney disease (CKD) and gather extensive health data are important for understanding the diverse progression patterns of CKD. This review explores the potential of emerging analytical techniques that can be applied in addition to conventional analysis approaches to enhance CKD research by offering more detailed insights into disease progression. To maximize the insights available from CKD cohort data with extended follow-up, we examined two advanced approaches: analysis of disease trajectories and analysis of recurrent events. The analysis of trajectories examines the timing and relationships between events, uncovering progression patterns and identifying key events that could signal future outcomes. In contrast, the application of recurrent event analysis facilitates the examination of repeated occurrences of significant events, thereby providing a more nuanced understanding of the evolution of risk over time. Using data from the German Chronic Kidney Disease study, this review illustrates how these approaches can enhance conventional analyses. The application of these supplementary methodologies to CKD research has the potential to facilitate a transition towards a more personalized approach to patient care. The insights gained may inform the development of tailored treatment strategies and contribute to enhanced overall patient outcomes.</p>","PeriodicalId":19078,"journal":{"name":"Nephrology Dialysis Transplantation","volume":" ","pages":"1107-1114"},"PeriodicalIF":4.8,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142864894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}