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Garam N, Prohászka Z, Szilágyi Á, Aigner C, Schmidt A, Gaggl M, Sunder-Plassmann G, Bajcsi D, Brunner J, Dumfarth A, Cejka D, Flaschberger S, Flögelova H, Haris Á, Hartmann Á, Heilos A, Mueller T, Rusai K, Arbeiter K, Hofer J, Jakab D, Sinkó M, Szigeti E, Bereczki C, Janko V, Kelen K, Reusz GS, Szabó AJ, Klenk N, Kóbor K, Kojc N, Knechtelsdorfer M, Laganovic M, Lungu AC, Meglic A, Rus R, Kersnik-Levart T, Macioniene E, Miglinas M, Pawłowska A, Stompór T, Podracka L, Rudnicki M, Mayer G, Rysava R, Reiterova J, Saraga M, Seeman T, Zieg J, Sládková E, Szabó T, Capitanescu A, Stancu S, Tisljar M, Galesic K, Tislér A, Vainumäe I, Windpessl M, Zaoral T, Zlatanova G, Csuka D. Validation of distinct pathogenic patterns in a cohort of membranoproliferative glomerulonephritis patients by cluster analysis. Clin Kidney J 2019; 13:225-234. [PMID: 32296528 PMCID: PMC7147314 DOI: 10.1093/ckj/sfz073] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 05/09/2019] [Indexed: 12/03/2022] Open
Abstract
Background A novel data-driven cluster analysis identified distinct pathogenic patterns in C3-glomerulopathies and immune complex-mediated membranoproliferative glomerulonephritis. Our aim was to replicate these observations in an independent cohort and elucidate disease pathophysiology with detailed analysis of functional complement markers. Methods A total of 92 patients with clinical, histological, complement and genetic data were involved in the study, and hierarchical cluster analysis was done by Ward method, where four clusters were generated. Results High levels of sC5b-9 (soluble membrane attack complex), low serum C3 levels and young age at onset (13 years) were characteristic for Cluster 1 with a high prevalence of likely pathogenic variations (LPVs) and C3 nephritic factor, whereas for Cluster 2—which is not reliable because of the small number of cases—strong immunoglobulin G staining, low C3 levels and high prevalence of nephritic syndrome at disease onset were observed. Low plasma sC5b-9 levels, decreased C3 levels and high prevalence of LPV and sclerotic glomeruli were present in Cluster 3, and patients with late onset of the disease (median: 39.5 years) and near-normal C3 levels in Cluster 4. A significant difference was observed in the incidence of end-stage renal disease during follow-up between the different clusters. Patients in Clusters 3–4 had worse renal survival than patients in Clusters 1–2. Conclusions Our results confirm the main findings of the original cluster analysis and indicate that the observed, distinct pathogenic patterns are replicated in our cohort. Further investigations are necessary to analyse the distinct biological and pathogenic processes in these patient groups.
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Affiliation(s)
- Nóra Garam
- Research Laboratory, 3rd Department of Internal Medicine, Hungarian Academy of Sciences and Semmelweis University, Budapest, Hungary.,MTA-SE Research Group of Immunology and Hematology, Hungarian Academy of Sciences and Semmelweis University, Budapest, Hungary
| | - Zoltán Prohászka
- Research Laboratory, 3rd Department of Internal Medicine, Hungarian Academy of Sciences and Semmelweis University, Budapest, Hungary.,MTA-SE Research Group of Immunology and Hematology, Hungarian Academy of Sciences and Semmelweis University, Budapest, Hungary
| | - Ágnes Szilágyi
- Research Laboratory, 3rd Department of Internal Medicine, Hungarian Academy of Sciences and Semmelweis University, Budapest, Hungary.,MTA-SE Research Group of Immunology and Hematology, Hungarian Academy of Sciences and Semmelweis University, Budapest, Hungary
| | - Christof Aigner
- Department of Medicine III, Division of Nephrology and Dialysis, Medical University of Vienna, Vienna, Austria
| | - Alice Schmidt
- Department of Medicine III, Division of Nephrology and Dialysis, Medical University of Vienna, Vienna, Austria
| | - Martina Gaggl
- Department of Medicine III, Division of Nephrology and Dialysis, Medical University of Vienna, Vienna, Austria
| | - Gere Sunder-Plassmann
- Department of Medicine III, Division of Nephrology and Dialysis, Medical University of Vienna, Vienna, Austria
| | - Dóra Bajcsi
- 1st Department of Internal Medicine, University of Szeged, Szeged, Hungary
| | - Jürgen Brunner
- Department of Pediatrics, Medical University of Innsbruck, Innsbruck, Austria
| | - Alexandra Dumfarth
- Department of Medicine III: Nephrology, Transplant Medicine and Rheumatology, Linz, Austria.,Geriatric Department, Ordensklinikum Linz - Elisabethinen, Linz, Austria
| | - Daniel Cejka
- Department of Medicine III: Nephrology, Transplant Medicine and Rheumatology, Linz, Austria.,Geriatric Department, Ordensklinikum Linz - Elisabethinen, Linz, Austria
| | | | - Hana Flögelova
- Department of Pediatrics, Division of Nephrology, Faculty of Medicine, Palacky University and Faculty Hospital in Olomouc, Olomouc, Czech Republic
| | - Ágnes Haris
- Department of Nephrology, Szent Margit Hospital, Budapest, Hungary
| | - Ágnes Hartmann
- Department of Pediatrics, University of Pécs, Pécs, Hungary
| | - Andreas Heilos
- Department of Pediatrics and Adolescent Medicine, Division of Pediatric Nephrology and Gastroenterology, Medical University of Vienna, Vienna, Austria
| | - Thomas Mueller
- Department of Pediatrics and Adolescent Medicine, Division of Pediatric Nephrology and Gastroenterology, Medical University of Vienna, Vienna, Austria
| | - Krisztina Rusai
- Department of Pediatrics and Adolescent Medicine, Division of Pediatric Nephrology and Gastroenterology, Medical University of Vienna, Vienna, Austria
| | - Klaus Arbeiter
- Department of Pediatrics and Adolescent Medicine, Division of Pediatric Nephrology and Gastroenterology, Medical University of Vienna, Vienna, Austria
| | - Johannes Hofer
- Department of Pediatrics, Medical University of Innsbruck, Innsbruck, Austria.,Institute of Neurology of Senses and Language, Hospital of St John of God, Linz, Austria.,Research Institute for Developmental Medicine, Johannes Kepler University Linz, Linz, Austria
| | - Dániel Jakab
- Department of Pediatrics, University of Szeged, Szeged, Hungary
| | - Mária Sinkó
- Department of Pediatrics, University of Szeged, Szeged, Hungary
| | - Erika Szigeti
- Department of Pediatrics, University of Szeged, Szeged, Hungary
| | - Csaba Bereczki
- Department of Pediatrics, University of Szeged, Szeged, Hungary
| | - Viktor Janko
- Medimapax - Center of Elimination Methods, Bratislava, Slovakia
| | - Kata Kelen
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | - György S Reusz
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | - Attila J Szabó
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | - Nóra Klenk
- FMC Center of Dialysis, Miskolc, Hungary
| | | | - Nika Kojc
- Institute of Pathology, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | | | - Mario Laganovic
- Department of Nephrology, Arterial Hypertension, Dialysis and Transplantation, University Hospital Center Zagreb, School of Medicine University of Zagreb, Zagreb, Croatia
| | | | - Anamarija Meglic
- Department of Pediatric Nephrology, Division of Pediatrics, University Medical Centre Ljubljana, Ljubljana, Slovenia
| | - Rina Rus
- Department of Pediatric Nephrology, Division of Pediatrics, University Medical Centre Ljubljana, Ljubljana, Slovenia
| | - Tanja Kersnik-Levart
- Department of Pediatric Nephrology, Division of Pediatrics, University Medical Centre Ljubljana, Ljubljana, Slovenia
| | - Ernesta Macioniene
- Nephrology Center, Santaros Klinikos, Medical Faculty, Vilnius University, Vilnius, Lithuania
| | - Marius Miglinas
- Nephrology Center, Santaros Klinikos, Medical Faculty, Vilnius University, Vilnius, Lithuania
| | - Anna Pawłowska
- Department of Nephrology, Hypertension and Internal Medicine, School of Medicine, Collegium Medicum, University of Warmia and Mazury, Olsztyn, Poland
| | - Tomasz Stompór
- Department of Nephrology, Hypertension and Internal Medicine, School of Medicine, Collegium Medicum, University of Warmia and Mazury, Olsztyn, Poland
| | - Ludmila Podracka
- Department of Pediatrics, Comenius University, Bratislava, Slovakia
| | - Michael Rudnicki
- Department of Internal Medicine IV-Nephrology and Hypertension, Medical University Innsbruck, Innsbruck, Austria
| | - Gert Mayer
- Department of Internal Medicine IV-Nephrology and Hypertension, Medical University Innsbruck, Innsbruck, Austria
| | - Romana Rysava
- Nephrology Clinic, 1st Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Jana Reiterova
- Nephrology Clinic, 1st Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Marijan Saraga
- Department of Pathology, University Hospital Split, Split, Croatia.,School of Medicine, University of Split, Split, Croatia
| | - Tomáš Seeman
- Department of Pediatrics, 2nd Faculty of Medicine, Charles University Prague, University Hospital Motol, Prague, Czech Republic
| | - Jakub Zieg
- Department of Pediatrics, 2nd Faculty of Medicine, Charles University Prague, University Hospital Motol, Prague, Czech Republic
| | - Eva Sládková
- Department of Pediatrics, Faculty of Medicine in Pilsen, Charles University in Prague, Pilsen, Czech Republic
| | - Tamás Szabó
- Department of Pediatrics, Faculty of Medicine, Debrecen University, Debrecen, Hungary
| | | | - Simona Stancu
- Carol Davila Nephrology Hospital, Bucharest, Romania
| | - Miroslav Tisljar
- Department of Nephrology, Dubrava University Hospital, Zagreb, Croatia
| | - Kresimir Galesic
- Department of Nephrology, Dubrava University Hospital, Zagreb, Croatia
| | - András Tislér
- 1st Department of Internal Medicine, Semmelweis University, Budapest, Hungary
| | - Inga Vainumäe
- Živile Riispere, Department of Pathology, Tartu University Hospital, Tartu, Estonia
| | - Martin Windpessl
- Internal Medicine IV, Section of Nephrology, Klinikum Wels-Grieskirchen, Wels, Austria
| | - Tomas Zaoral
- Department of Pediatrics, Faculty of Medicine, University Hospital, Ostrava, Czech Republic
| | - Galia Zlatanova
- University Children's Hospital, Medical University, Sofia, Bulgaria
| | - Dorottya Csuka
- Research Laboratory, 3rd Department of Internal Medicine, Hungarian Academy of Sciences and Semmelweis University, Budapest, Hungary.,MTA-SE Research Group of Immunology and Hematology, Hungarian Academy of Sciences and Semmelweis University, Budapest, Hungary
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