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Pande A, Kumar A, Krishnani H, Acharya S, Shukla S. Recent Advances in the Management of Microangiopathic Hemolytic Anemias (MAHA): A Narrative Review. Cureus 2023; 15:e47196. [PMID: 38021690 PMCID: PMC10653637 DOI: 10.7759/cureus.47196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 10/17/2023] [Indexed: 12/01/2023] Open
Abstract
Red blood cells (RBCs) start to break down early in hemolytic anemia, which can be chronic or life-threatening. It should be considered while determining if normocytic or macrocytic anemia is present. Hemolysis in the reticuloendothelial system may happen intravascularly, extravascularly, or both. It accounts for a broad spectrum of laboratory and clinical situations, both physiological and pathological. Whenever the frequency of RBC breakdown is rapid enough to lower hemoglobin levels below the normal range, hemolytic anemia occurs. Microangiopathic hemolytic anemia (MAHA) is a term used to describe non-immune hemolysis induced by intravascular RBC fragmentation caused by substances in the tiny blood arteries that generate schistocytes in the peripheral circulation. Microvasculature abnormalities, such as small arterioles and capillaries, are usually involved. Furthermore, MAHA can also be brought on by intravascular devices like a prosthetic heart valve or assistive technologies. Poor deformity results in entrapment, phagocytosis, antibody-mediated elimination through phagocytosis or direct complement activation, fragmentation brought about by microthrombi or acute mechanical stress, oxidation, or spontaneous cellular death. Hemolysis may cause acute anemia, jaundice, hematuria, dyspnea, tiredness, tachycardia, and possibly hypotension. This article aims to synthesize existing research, identify therapeutic strategies, and provide insights into current and emerging approaches for managing this complex hematological disorder.
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Affiliation(s)
- Arundhati Pande
- Medicine, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education and Research, Wardha, IND
| | - Abhishek Kumar
- Medicine, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education and Research, Wardha, IND
| | - Harshil Krishnani
- Medicine, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education and Research, Wardha, IND
| | - Sourya Acharya
- Medicine, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education and Research, Wardha, IND
| | - Samarth Shukla
- Pathology, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education and Research, Wardha, IND
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Gastoldi S, Aiello S, Galbusera M, Breno M, Alberti M, Bresin E, Mele C, Piras R, Liguori L, Santarsiero D, Benigni A, Remuzzi G, Noris M. An ex vivo test to investigate genetic factors conferring susceptibility to atypical haemolytic uremic syndrome. Front Immunol 2023; 14:1112257. [PMID: 36845135 PMCID: PMC9949374 DOI: 10.3389/fimmu.2023.1112257] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 01/20/2023] [Indexed: 02/11/2023] Open
Abstract
Introduction Comprehensive genetic analysis is essential to clinical care of patients with atypical haemolytic uremic syndrome (aHUS) to reinforce diagnosis, and to guide treatment. However, the characterization of complement gene variants remains challenging owing to the complexity of functional studies with mutant proteins. This study was designed: 1) To identify a tool for rapid functional determination of complement gene variants; 2) To uncover inherited complement dysregulation in aHUS patients who do not carry identified gene variants. Methods To address the above goals, we employed an ex-vivo assay of serum-induced C5b-9 formation on ADP-activated endothelial cells in 223 subjects from 60 aHUS pedigrees (66 patients and 157 unaffected relatives). Results Sera taken from all aHUS patients in remission induced more C5b-9 deposition than control sera, independently from the presence of complement gene abnormalities. To avoid the possible confounding effects of chronic complement dysregulation related to aHUS status, and considering the incomplete penetrance for all aHUS-associated genes, we used serum from unaffected relatives. In control studies, 92.7% of unaffected relatives with known pathogenic variants exhibited positive serum-induced C5b-9 formation test, documenting a high sensitivity of the assay to identify functional variants. The test was also specific, indeed it was negative in all non-carrier relatives and in relatives with variants non-segregating with aHUS. All but one variants in aHUS-associated genes predicted in-silico as likely pathogenic or of uncertain significance (VUS) or likely benign resulted as pathogenic in the C5b-9 assay. At variance, variants in putative candidate genes did not exhibit a functional effect, with the exception of a CFHR5 variant. The C5b-9 assay in relatives was helpful in defining the relative functional effect of rare variants in 6 pedigrees in which the proband carried more than one genetic abnormality. Finally, for 12 patients without identified rare variants, the C5b-9 test in parents unmasked a genetic liability inherited from an unaffected parent. Discussion In conclusion, the serum-induced C5b-9 formation test in unaffected relatives of aHUS patients may be a tool for rapid functional evaluation of rare complement gene variants. When combined with exome sequencing the assay might be of help in variant selection, to identify new aHUS-associated genetic factors.
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Affiliation(s)
- Sara Gastoldi
- Clinical Research Center for Rare Diseases Aldo e Cele Daccò and Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Sistiana Aiello
- Clinical Research Center for Rare Diseases Aldo e Cele Daccò and Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Miriam Galbusera
- Clinical Research Center for Rare Diseases Aldo e Cele Daccò and Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Matteo Breno
- Clinical Research Center for Rare Diseases Aldo e Cele Daccò and Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Marta Alberti
- Clinical Research Center for Rare Diseases Aldo e Cele Daccò and Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Elena Bresin
- Clinical Research Center for Rare Diseases Aldo e Cele Daccò and Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Caterina Mele
- Clinical Research Center for Rare Diseases Aldo e Cele Daccò and Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Rossella Piras
- Clinical Research Center for Rare Diseases Aldo e Cele Daccò and Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Lucia Liguori
- Clinical Research Center for Rare Diseases Aldo e Cele Daccò and Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Donata Santarsiero
- Clinical Research Center for Rare Diseases Aldo e Cele Daccò and Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Ariela Benigni
- Clinical Research Center for Rare Diseases Aldo e Cele Daccò and Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Giuseppe Remuzzi
- Clinical Research Center for Rare Diseases Aldo e Cele Daccò and Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
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Abstract
Dysregulation and accelerated activation of the alternative pathway (AP) of complement is known to cause or accentuate several pathologic conditions in which kidney injury leads to the appearance of hematuria and proteinuria and ultimately to the development of chronic renal failure. Multiple genetic and acquired defects involving plasma- and membrane-associated proteins are probably necessary to impair the protection of host tissues and to confer a significant predisposition to AP-mediated kidney diseases. This review aims to explore how our current understanding will make it possible to identify the mechanisms that underlie AP-mediated kidney diseases and to discuss the available clinical evidence that supports complement-directed therapies. Although the value of limiting uncontrolled complement activation has long been recognized, incorporating complement-targeted treatments into clinical use has proved challenging. Availability of anti-complement therapy has dramatically transformed the outcome of atypical hemolytic uremic syndrome, one of the most severe kidney diseases. Innovative drugs that directly counteract AP dysregulation have also opened new perspectives for the management of other kidney diseases in which complement activation is involved. However, gained experience indicates that the choice of drug should be tailored to each patient's characteristics, including clinical, histologic, genetic, and biochemical parameters. Successfully treating patients requires further research in the field and close collaboration between clinicians and researchers who have special expertise in the complement system.
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Affiliation(s)
- Erica Daina
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Monica Cortinovis
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Giuseppe Remuzzi
- Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
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Park J, Yhim HY, Kang KP, Bae TW, Cho YG. Copy number variation analysis using next-generation sequencing identifies the CFHR3/ CFHR1 deletion in atypical hemolytic uremic syndrome: a case report. Hematology 2022; 27:603-608. [PMID: 35617302 DOI: 10.1080/16078454.2022.2075121] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVES Atypical hemolytic uremic syndrome (aHUS) is characterized by a triad of thrombocytopenia, microangiopathic hemolytic anemia, and acute renal failure resulting from platelet thrombi in the microcirculation of the kidney and other organs, in the absence of a preceding diarrheal illness. This report describes a case in which copy number variation (CNV) analysis using next-generation sequencing (NGS) identified the CFHR3/CFHR1 deletion in a patient with aHUS. METHODS A 49-year-old Korean female was diagnosed with aHUS based on clinical findings, including schistocytes in peripheral blood and marked thrombocytopenia, suggesting the presence of thrombotic microangiopathy, elevated serum lactate dehydrogenase, and acute kidney injury. Sequence variants and CNV generated from NGS data were estimated to determine if there was a potential genetic cause. Multiplex ligation-dependent probe amplification (MLPA) was conducted to confirm the CFHR3/CFHR1 deletion identified by NGS with CNV analysis. RESULTS No known or novel pathogenic single nucleotide variant or small insertion/deletion that would be predicted to have damaging effects that could lead to aHUS were identified. However, CNV analysis of NGS data identified the heterozygous CFHR3/CFHR1 deletion. MLPA confirmed this loss of one copy number between the CFHR3 and the CFHR1 genes on chromosome 1q31.3. CONCLUSION We genetically diagnosed a Korean woman harboring a heterozygous CFHR3/CFHR1 deletion of a known causative gene for aHUS. Our report emphasizes the need for CNV analysis of NGS data and gene dosage assays, such as MLPA, to evaluate large-scale deletions or duplications and generate hybrid CFH genes in patients with suspected aHUS.
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Affiliation(s)
- Joonhong Park
- Department of Laboratory Medicine, Jeonbuk National University Medical School and Hospital, Jeonju, Korea.,Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Korea
| | - Ho-Young Yhim
- Department of Internal Medicine, Jeonbuk National University Medical School and Hospital, Jeonju, Korea.,Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Korea
| | - Kyung Pyo Kang
- Department of Internal Medicine, Jeonbuk National University Medical School and Hospital, Jeonju, Korea.,Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Korea
| | - Tae Won Bae
- Department of Laboratory Medicine, Jeonbuk National University Medical School and Hospital, Jeonju, Korea.,Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Korea
| | - Yong Gon Cho
- Department of Laboratory Medicine, Jeonbuk National University Medical School and Hospital, Jeonju, Korea.,Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Korea
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5
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Nunius C, Büttner-Herold M, Bertz S, Schiffer M, Buchholz B. Isolated thrombotic microangiopathy of the small intestine in a patient with atypical hemolytic uremic syndrome - a case report. BMC Nephrol 2020; 21:104. [PMID: 32204691 PMCID: PMC7092568 DOI: 10.1186/s12882-020-01766-0] [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] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 03/13/2020] [Indexed: 01/04/2023] Open
Abstract
Background Atypical hemolytic uremic syndrome (aHUS) is a rare disease characterized by systemic thrombotic microangiopathy (TMA) reflected by hemolysis, anemia, thrombocytopenia and systemic organ injury. The optimal management of aHUS-patients when undergoing kidney transplantation to prevent recurrence in the allograft is eculizumab, an approved recombinant antibody targeting human complement component C5. Case presentation A 39 year-old woman presented with severe abdominal pain, diarrhea and emesis for 3 days. In her past medical history she had experienced an episode of aHUS leading to end stage renal disease (ESRD) in 2007 and a genetic workup revealed a heterozygous mutation in the membrane cofactor protein gene. In 2014 she underwent cadaveric kidney transplantation. Four years later she had to go back on hemodialysis due to allograft failure following a severe systemic cytomegalovirus infection resulting in transplant failure. At presentation she still received calcineurin-inhibitor therapy and reported subfebrile temperatures and pain projecting over the transplant prior to the current symptoms. A contrast enhanced CT-scan of the abdomen revealed inflammatory wall thickening of the small intestine. Diagnostic endoscopy discovered fresh blood in the small intestine without a clear source of bleeding. Histopathology of the small intestine biopsies showed severe thrombotic microangiopathy. Of note, the patient persistently had no signs of systemic hemolysis. Since the TMA of the small intestine was most likely due to aHUS, eculizumab treatment was initiated which abolished the symptoms. Conclusion Here we report a patient with thrombotic microangiopathy with predominant manifestation in a single organ, the small intestine, due to aHUS with absence of systemic signs and symptoms. aHUS patients usually require a secondary trigger for the disease to manifest. In this case, the trigger may be attributed to the dysfunctional renal transplant, which was subsequently explanted. Histology of the explanted kidney showed severe inflammation due to purulent nephritis and signs of cellular rejection. After nephrectomy, we continued eculizumab therapy until the patient completely recovered. No signs of TMA recurred after discontinuation of eculizumab, further supporting the concept of the renal transplant as the main trigger of TMA of the small intestine in our patient.
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Affiliation(s)
- Christoph Nunius
- Department of Nephrology and Hypertension, Friedrich-Alexander-University Erlangen-Nürnberg, Ulmenweg, 18, Erlangen, Germany.
| | - Maike Büttner-Herold
- Department of Nephropathology, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Simone Bertz
- Institute of Pathology, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Mario Schiffer
- Department of Nephrology and Hypertension, Friedrich-Alexander-University Erlangen-Nürnberg, Ulmenweg, 18, Erlangen, Germany
| | - Bjoern Buchholz
- Department of Nephrology and Hypertension, Friedrich-Alexander-University Erlangen-Nürnberg, Ulmenweg, 18, Erlangen, Germany
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Jamme M, Raimbourg Q, Chauveau D, Seguin A, Presne C, Perez P, Gobert P, Wynckel A, Provôt F, Delmas Y, Mousson C, Servais A, Vrigneaud L, Veyradier A, Rondeau E, Coppo P. Predictive features of chronic kidney disease in atypical haemolytic uremic syndrome. PLoS One 2017; 12:e0177894. [PMID: 28542627 PMCID: PMC5436831 DOI: 10.1371/journal.pone.0177894] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Accepted: 05/04/2017] [Indexed: 11/18/2022] Open
Abstract
Chronic kidney disease (CKD) is a frequent and serious complication of atypical haemolytic uremic syndrome (aHUS). We aimed to develop a simple accurate model to predict the risk of renal dysfunction in aHUS based on clinical and biological features available at hospital admission. Renal function at 1-year follow-up, based on an estimated glomerular filtration rate < 60mL/min/1.73m2 as assessed by the Modification of Diet in Renal Disease equation, was used as an indicator of significant CKD. Prospectively collected data from a cohort of 156 aHUS patients who did not receive eculizumab were used to identify predictors of CKD. Covariates associated with renal impairment were identified by multivariate analysis. The model performance was assessed and a scoring system for clinical practice was constructed from the regression coefficient. Multivariate analyses identified three predictors of CKD: a high serum creatinine level, a high mean arterial pressure and a mildly decreased platelet count. The prognostic model had a good discriminative ability (area under the curve = .84). The scoring system ranged from 0 to 5, with corresponding risks of CKD ranging from 18% to 100%. This model accurately predicts development of 1-year CKD in patients with aHUS using clinical and biological features available on admission. After further validation, this model may assist in clinical decision making.
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Affiliation(s)
- Matthieu Jamme
- Centre de Reference des Microangiopathies Thrombotiques, Hôpital Saint Antoine, AP-HP, Paris, France
- Urgences Néphrologiques et Transplantation Rénale, Hôpital Tenon, AP-HP, Paris, France
| | | | - Dominique Chauveau
- Centre de Reference des Microangiopathies Thrombotiques, Hôpital Saint Antoine, AP-HP, Paris, France
- Service de Néphrologie-immunologie clinique, Hôpital Rangueil, Toulouse, France
| | - Amélie Seguin
- Centre de Reference des Microangiopathies Thrombotiques, Hôpital Saint Antoine, AP-HP, Paris, France
- Service de Réanimation Médicale, Centre Hospitalier Universitaire de Caen, Normandy, France
| | - Claire Presne
- Centre de Reference des Microangiopathies Thrombotiques, Hôpital Saint Antoine, AP-HP, Paris, France
- Service de Néphrologie - Médecine Interne, Hôpital Sud, Amiens, France
| | - Pierre Perez
- Centre de Reference des Microangiopathies Thrombotiques, Hôpital Saint Antoine, AP-HP, Paris, France
- Service de Néphrologie-Immunologie, Service de Réanimation, CHU Brabois, Nancy, France
| | - Pierre Gobert
- Centre de Reference des Microangiopathies Thrombotiques, Hôpital Saint Antoine, AP-HP, Paris, France
- Service de Médecine Interne et Néphrologie, Hôpital Général Henri Duffaut, Avignon, France
| | - Alain Wynckel
- Centre de Reference des Microangiopathies Thrombotiques, Hôpital Saint Antoine, AP-HP, Paris, France
- Service de Néphrologie, Hôpital Maison Blanche, Reims, France
| | - François Provôt
- Centre de Reference des Microangiopathies Thrombotiques, Hôpital Saint Antoine, AP-HP, Paris, France
- Service de Néphrologie, Hôpital Albert Calmette, Lille, France
| | - Yahsou Delmas
- Centre de Reference des Microangiopathies Thrombotiques, Hôpital Saint Antoine, AP-HP, Paris, France
- Service de Néphrologie-Transplantation-Dialyse, CHU de Bordeaux, Bordeaux, France
| | - Christiane Mousson
- Centre de Reference des Microangiopathies Thrombotiques, Hôpital Saint Antoine, AP-HP, Paris, France
- Service de Néphrologie, Dijon, France
| | - Aude Servais
- Centre de Reference des Microangiopathies Thrombotiques, Hôpital Saint Antoine, AP-HP, Paris, France
- Service de Néphrologie, Hôpital Necker-Enfants Malades, AP-HP, Paris, France
| | - Laurence Vrigneaud
- Centre de Reference des Microangiopathies Thrombotiques, Hôpital Saint Antoine, AP-HP, Paris, France
- Service de Médecine interne, Néphrologie et Médecine vasculaire, Centre hospitalier de Valenciennes, Valenciennes, France
| | - Agnès Veyradier
- Centre de Reference des Microangiopathies Thrombotiques, Hôpital Saint Antoine, AP-HP, Paris, France
- Service d'Hématologie Biologique, Hôpital Lariboisière, AP-HP, Paris, France
| | - Eric Rondeau
- Centre de Reference des Microangiopathies Thrombotiques, Hôpital Saint Antoine, AP-HP, Paris, France
- Urgences Néphrologiques et Transplantation Rénale, Hôpital Tenon, AP-HP, Paris, France
| | - Paul Coppo
- Centre de Reference des Microangiopathies Thrombotiques, Hôpital Saint Antoine, AP-HP, Paris, France
- Service d’Hématologie, Hôpital Saint Antoine, AP-HP, Paris, France
- * E-mail:
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Åkesson A, Zetterberg E, Klintman J. At the Cross Section of Thrombotic Microangiopathy and Atypical Hemolytic Uremic Syndrome: A Narrative Review of Differential Diagnostics and a Problematization of Nomenclature. Ther Apher Dial 2017; 21:304-319. [DOI: 10.1111/1744-9987.12535] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 01/04/2017] [Accepted: 01/10/2017] [Indexed: 12/18/2022]
Affiliation(s)
- Alexander Åkesson
- Department of Translational Medicine, Faculty of Medicine; Lund University; Sweden
| | - Eva Zetterberg
- Department of Translational Medicine, Faculty of Medicine; Lund University; Sweden
| | - Jenny Klintman
- Department of Translational Medicine, Faculty of Medicine; Lund University; Sweden
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8
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Wehling C, Amon O, Bommer M, Hoppe B, Kentouche K, Schalk G, Weimer R, Wiesener M, Hohenstein B, Tönshoff B, Büscher R, Fehrenbach H, Gök ÖN, Kirschfink M. Monitoring of complement activation biomarkers and eculizumab in complement-mediated renal disorders. Clin Exp Immunol 2016; 187:304-315. [PMID: 27784126 DOI: 10.1111/cei.12890] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/07/2016] [Indexed: 12/18/2022] Open
Abstract
Various complement-mediated renal disorders are treated currently with the complement inhibitor eculizumab. By blocking the cleavage of C5, this monoclonal antibody prevents cell damage caused by complement-mediated inflammation. We included 23 patients with atypical haemolytic uraemic syndrome (aHUS, n = 12), C3 glomerulopathies (C3G, n = 9) and acute antibody-mediated renal graft rejection (AMR, n = 2), treated with eculizumab in 12 hospitals in Germany. We explored the course of complement activation biomarkers and the benefit of therapeutic drug monitoring of eculizumab. Complement activation was assessed by analysing the haemolytic complement function of the classical (CH50) and the alternative pathway (APH50), C3 and the activation products C3d, C5a and sC5b-9 prior to, 3 and 6 months after eculizumab treatment. Eculizumab concentrations were determined by a newly established specific enzyme-linked immunosorbent assay (ELISA). Serum eculizumab concentrations up to 1082 μg/ml point to drug accumulation, especially in paediatric patients. Loss of the therapeutic antibody via urine with concentrations up to 56 μg/ml correlated with proteinuria. In aHUS patients, effective complement inhibition was demonstrated by significant reductions of CH50, APH50, C3d and sC5b-9 levels, whereas C5a levels were only reduced significantly after 6 months' treatment. C3G patients presented increased C3d and consistently low C3 levels, reflecting ongoing complement activation and consumption at the C3 level, despite eculizumab treatment. A comprehensive complement analysis together with drug monitoring is required to distinguish mode of complement activation and efficacy of eculizumab treatment in distinct renal disorders. Accumulation of the anti-C5 antibody points to the need for a patient-orientated tailored therapy.
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Affiliation(s)
- C Wehling
- Institute of Immunology, University of Heidelberg, Heidelberg, Germany
| | - O Amon
- Department of Pediatric Nephrology, University Hospital Tübingen, Germany
| | - M Bommer
- Department of Hematology and Oncology, ALB FILS Hospital Göppingen, Germany
| | - B Hoppe
- Department of Pediatric Nephrology, University Hospital Bonn, Germany
| | - K Kentouche
- Department of Pediatric Immunology, University Hospital Jena, Germany
| | - G Schalk
- Department of Pediatric Nephrology, University Children's Hospital Zurich, Switzerland
| | - R Weimer
- Department of Internal Medicine, University of Giessen, Germany
| | - M Wiesener
- Department of Nephrology and Hypertension, University Hospital Erlangen, Germany
| | - B Hohenstein
- Division of Nephrology, Department of Internal Medicine III, University Hospital Carl Gustav Carus, Dresden, Germany
| | - B Tönshoff
- Department of Pediatrics I, University Children's Hospital Heidelberg, Germany
| | - R Büscher
- Department of Pediatric Nephrology, University Hospital Essen, Germany
| | - H Fehrenbach
- Department of Pediatric Nephrology, Hospital Memmingen, Germany
| | - Ö-N Gök
- Department of Internal Medicine IV, University Hospital Freiburg, Germany
| | - M Kirschfink
- Institute of Immunology, University of Heidelberg, Heidelberg, Germany
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9
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Isnard P, Labaye J, Bourgault M, Sarret D, Hérody M. [TTP or HUS? About a case revealing an IgA nephropathy]. Nephrol Ther 2016; 10:532-6. [PMID: 25458228 DOI: 10.1016/j.nephro.2014.10.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2014] [Revised: 09/09/2014] [Accepted: 10/07/2014] [Indexed: 02/02/2023]
Abstract
Thrombotic microangiopathy includes a set of conditions characterized by the association of mechanical hemolytic anemia, thrombocytopenia and organ failure which accurate diagnosis is sometimes difficult. We report the case of a patient who presented a thrombotic microangiopathy (TMA) due to an atypical hemolytic and uremic syndrome (HUS) associated with an immunoglobulin A (IgA) nephropathy with a favorable outcome under corticosteroid.
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Affiliation(s)
- Pierre Isnard
- Service de néphrologie, hôpital d’instruction des armées du Val-De-Grâce, 74, boulevard de Port-Royal, 75230 Paris cedex 05, France.
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10
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Åkesson A, Blom AM, Klintman J, Zetterberg E. Indications of underdiagnosis of atypical haemolytic uraemic syndrome in a cohort referred to the Coagulation Unit in Malmo, Sweden, for analysis of ADAMTS13 2007-2012. Nephrology (Carlton) 2016; 22:555-561. [PMID: 27175932 DOI: 10.1111/nep.12818] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Revised: 05/07/2016] [Accepted: 05/10/2016] [Indexed: 11/29/2022]
Abstract
AIM Complement-mediated atypical haemolytic uraemic syndrome (aHUS) is a rare disease with high mortality and morbidity if left untreated. The diagnostic work-up is complicated and the manifestations overlap with other conditions. Therefore, we hypothesize that complement-mediated aHUS is an under diagnosed disease. METHODS A cohort of 768 referrals referred to the Coagulation Unit in Malmo, Sweden, for analysis of a disintegrin and metalloproteinase with a thrombospondin type 1 motif, member 13 (ADAMTS13), 2007-2012, were retrospectively reviewed. Subjects were included on the basis of presence of haemolytic anaemia, thrombocytopaenia, renal failure and ADAMTS13 > 0.05. They were excluded if tested positive for Escherichia coli. Included subjects were categorized as "suspected HUS" with and without potential causes and triggers. Levels of C3 and C4, presence of complement factor H (CFH)-specific antibodies and associated deficiency in complement factor H related protein 1 (CFHR1) were analyzed on frozen samples. RESULTS In total, 134/316 (42%) unique subjects fulfilled inclusion criteria; 103 were categorized as "suspected HUS associated with potential causes/triggers" and 31 subjects categorized as "suspected HUS" without such association. One case of complement-mediated aHUS had been confirmed during the treatment period. Laboratory analyses performed showed that in total 78 cases had findings consistent with complement-mediated aHUS: 24 cases indicated presence of CFH-specific antibodies whereof five cases had isolated low C3 titres and six cases had deficiency of CFHR1. Additionally 54 cases indicated isolated alternative pathway consumption. CONCLUSION The results suggest that the presence of complement-mediated aHUS was under diagnosed in this cohort calling for improvement of diagnostic availability.
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Affiliation(s)
- Alexander Åkesson
- Department of Translational Medicine, Lund University, Malmö, Sweden
| | - Anna M Blom
- Department of Translational Medicine, Lund University, Malmö, Sweden
| | - Jenny Klintman
- Department of Translational Medicine, Lund University, Malmö, Sweden
| | - Eva Zetterberg
- Department of Translational Medicine, Lund University, Malmö, Sweden
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11
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Licht C, Ardissino G, Ariceta G, Cohen D, Cole JA, Gasteyger C, Greenbaum LA, Johnson S, Ogawa M, Schaefer F, Vande Walle J, Frémeaux-Bacchi V. The global aHUS registry: methodology and initial patient characteristics. BMC Nephrol 2015; 16:207. [PMID: 26654630 PMCID: PMC4674928 DOI: 10.1186/s12882-015-0195-1] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2014] [Accepted: 11/25/2015] [Indexed: 02/07/2023] Open
Abstract
Background Atypical hemolytic uremic syndrome (aHUS) is a rare, genetically-mediated systemic disease most often caused by chronic, uncontrolled complement activation that leads to systemic thrombotic microangiopathy (TMA) and renal and other end-organ damage. Methods The global aHUS Registry, initiated in April 2012, is an observational, noninterventional, multicenter registry designed to collect demographic characteristics, medical and disease history, treatment effectiveness and safety outcomes data for aHUS patients. The global aHUS Registry will operate for a minimum of 5 years of follow-up. Enrollment is open to all patients with a clinical diagnosis of aHUS, with no requirement for identified complement gene mutations, polymorphisms or autoantibodies or particular type of therapy/management. Results As of September 30, 2014, 516 patients from 16 countries were enrolled. At enrollment, 315 (61.0 %) were adults (≥18 years) and 201 (39.0 %) were <18 years of age. Mean (standard deviation [SD]) age at diagnosis was 22.7 (20.5) years. Nineteen percent of patients had a family history of aHUS, 60.3 % had received plasma exchange/plasma infusion, 59.5 % had a history of dialysis, and 19.6 % had received ≥1 kidney transplant. Overall, 305 patients (59.1 %) have received eculizumab. Conclusions As enrollment and follow-up proceed, the global aHUS Registry is expected to yield valuable baseline, natural history, medical outcomes, treatment effectiveness and safety data from a diverse population of patients with aHUS. Trial registration US National Institutes of Health www.ClinicalTrials.gov Identifier NCT01522183. Registered January 18, 2012.
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Affiliation(s)
- Christoph Licht
- Division of Nephrology and Program in Cell Biology, The Hospital for Sick Children, 555 University Avenue, Toronto, ON, M5G 1X8, Canada.
| | - Gianluigi Ardissino
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Via della Comenda 9, Milan, 20122, Italy.
| | - Gema Ariceta
- Pediatric Nephrology, University Hospital Vall d'Hebron, Pg Vall d' Hebron, 119-129, Barcelona, Spain.
| | - David Cohen
- Columbia University Medical Center, 622 West 168 Street, Room PH4-124, New York, NY, USA.
| | - J Alexander Cole
- Alexion Pharmaceuticals, Inc., 352 Knotter Drive, Cheshire, CT, USA.
| | - Christoph Gasteyger
- Alexion Pharma International, Avenue du Tribunal Fédéral 34, Lausanne, Switzerland.
| | - Larry A Greenbaum
- Emory University and Children's Healthcare of Atlanta, 2015 Uppergate Drive, Atlanta, GA, USA.
| | - Sally Johnson
- Great North Children's Hospital, Sir James Spence Institute, 4th floor, Royal Victoria Infirmary, Newcastle, United Kingdom.
| | - Masayo Ogawa
- Alexion Pharmaceuticals, Inc., 352 Knotter Drive, Cheshire, CT, USA.
| | - Franz Schaefer
- Heidelberg University Medical Center, Im Neuenheimer Feld 672, 69120, Heidelberg, Germany.
| | | | - Véronique Frémeaux-Bacchi
- Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges Pompidou, 20 rue Leblanc, Paris, France.
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12
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Lappegård KT, Bjerre A, Tjønnfjord GE, Mollnes TE. Therapeutic complement inhibition – from experimental to clinical medicine. TIDSSKRIFT FOR DEN NORSKE LEGEFORENING 2015; 135:1745-9. [PMID: 26486669 DOI: 10.4045/tidsskr.15.0049] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
Internationally, the use of the C5-inhibiting monoclonal antibody eculizumab has in the course of just a few years become the first choice of treatment of atypical haemolytic uraemic syndrome and the most severe phenotypes of paroxysmal nocturnal haemoglobinuria. At present eculizumab is the only complement inhibitor in ordinary clinical use. This despite the fact that there only exists one randomised, placebo-controlled trial of eculizumab for paroxysmal nocturnal haemoglobinuria and none for atypical haemolytic uraemic syndrome, and that the therapy is very costly. There is reason to believe that complement inhibition as therapy will increase in the future, and that other drugs will also prove to be effective.
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Affiliation(s)
- Knut Tore Lappegård
- Medisinsk divisjon Nordlandssykehuset Bodø og Institutt for klinisk medisin Universitetet i Tromsø
| | - Anna Bjerre
- Barnemedisinsk avdeling Kvinne- og barneklinikken Oslo universitetssykehus
| | - Geir Erland Tjønnfjord
- Avdeling for blodsykdommer Oslo universitetssykehus og Institutt for klinisk medisin Universitetet i Oslo
| | - Tom Eirik Mollnes
- Forskningslaboratoriet Nordlandssykehuset Bodø og Senter for molekylær inflammasjonsforskning (SFF-CEMIR) Norges teknisk-naturvitenskapelige universitet
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13
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Szarvas N, Szilágyi Á, Tasic V, Nushi-Stavileci V, Sofijanova A, Gucev Z, Szabó M, Szabó A, Szeifert L, Reusz G, Rusai K, Arbeiter K, Müller T, Prohászka Z. First-line therapy in atypical hemolytic uremic syndrome: consideration on infants with a poor prognosis. Ital J Pediatr 2014; 40:101. [PMID: 25496981 PMCID: PMC4295478 DOI: 10.1186/s13052-014-0101-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Accepted: 12/02/2014] [Indexed: 12/22/2022] Open
Abstract
Background Atypical hemolytic uremic syndrome (aHUS) is a rare and heterogeneous disorder. The first line treatment of aHUS is plasma therapy, but in the past few years, the recommendations have changed greatly with the advent of eculizumab, a humanized monoclonal anti C5-antibody. Although recent recommendations suggest using it as a primary treatment for aHUS, important questions have arisen about the necessity of immediate use of eculizumab in all cases. We aimed to draw attention to a specific subgroup of aHUS patients with rapid disease progression and high mortality, in whom plasma therapy may not be feasible. Methods We present three pediatric patients of acute complement-mediated HUS with a fatal outcome. Classical and alternative complement pathway activity, levels of complement factors C3, C4, H, B and I, as well as of anti-factor H autoantibody and of ADAMTS13 activity were determined. The coding regions of CFH, CFI, CD46, THBD, CFB and C3 genes were sequenced and the copy number of CFI, CD46, CFH and related genes were analyzed. Results We found severe activation and consumption of complement components in these patients, furthermore, in one patient we identified a previously not reported mutation in CFH (Ser722Stop), supporting the diagnosis of complement-mediated HUS. These patients were not responsive to the FFP therapy, and all cases had fatal outcome. Conclusion Taking the heterogeneity and the variable prognosis of atypical HUS into account, we suggest that the immediate use of eculizumab should be considered as first-line therapy in certain small children with complement dysregulation.
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Affiliation(s)
- Nóra Szarvas
- 3rd Department of Internal Medicine, Semmelweis University, Kútvölgyi st. 4, H-1125, Budapest, Hungary.
| | - Ágnes Szilágyi
- 3rd Department of Internal Medicine, Semmelweis University, Kútvölgyi st. 4, H-1125, Budapest, Hungary.
| | - Velibor Tasic
- Department of Pediatric Nephrology, University Children's Hospital, Skopje, Macedonia.
| | - Valbona Nushi-Stavileci
- Department of Nephrology, Pediatric Clinic, University Clinical Centre of Kosova, Prishtina, Republic of Kosovo.
| | - Aspazija Sofijanova
- Department of Pediatric Nephrology, University Children's Hospital, Skopje, Macedonia.
| | - Zoran Gucev
- Department of Pediatric Nephrology, University Children's Hospital, Skopje, Macedonia.
| | - Miklós Szabó
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary.
| | - Attila Szabó
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary.
| | - Lilla Szeifert
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary.
| | - György Reusz
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary.
| | - Krisztina Rusai
- Department of Pediatrics, Medical University Vienna, Vienna, Austria.
| | - Klaus Arbeiter
- Department of Pediatrics, Medical University Vienna, Vienna, Austria.
| | - Thomas Müller
- Department of Pediatrics, Medical University Vienna, Vienna, Austria.
| | - Zoltán Prohászka
- 3rd Department of Internal Medicine, Semmelweis University, Kútvölgyi st. 4, H-1125, Budapest, Hungary.
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14
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Loss of DGKε induces endothelial cell activation and death independently of complement activation. Blood 2014; 125:1038-46. [PMID: 25498910 DOI: 10.1182/blood-2014-06-579953] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Atypical hemolytic uremic syndrome (aHUS) is classically described to result from a dysregulation of the complement alternative pathway, leading to glomerular endothelial cell (EC) damage and thrombosis. However, recent findings in families with aHUS of mutations in the DGKE gene, which is not an integral component of the complement cascade, led us to consider other pathophysiologic mechanisms for this disease. Here, we demonstrate that loss of DGKε expression/activity in EC induces an increase in ICAM-1 and tissue factor expression through the upregulation of p38-MAPK-mediated signals, thus highlighting a proinflammatory and prothrombotic phenotype of DGKε-deficient ECs. More interestingly, DGKE silencing also increases EC apoptosis and impairs EC migration and angiogenesis in vitro, suggesting that DGKE loss-of-function mutations impair EC repair and angiogenesis in vivo. Conversely, DGKE knockdown moderately decreases the expression of the complement inhibitory protein MCP on quiescent EC, but does not induce complement deposition on their surface in vitro. Collectively, our data strongly suggest that in DGKE-associated aHUS patients, thrombotic microangiopathy results from impaired EC proliferation and angiogenesis rather than complement-mediated EC lesions. Our study expands the current knowledge of aHUS mechanisms and has implications for the treatment of patients with isolated DGKE mutations.
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15
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[Diagnostic and therapeutic guidelines of thrombotic microangiopathies of the Spanish Apheresis Group]. Med Clin (Barc) 2014; 144:331.e1-331.e13. [PMID: 25433791 DOI: 10.1016/j.medcli.2014.09.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Accepted: 09/18/2014] [Indexed: 12/18/2022]
Abstract
Thrombotic microangiopathies (TMA) are disorders defined by the presence of a microangiopathic hemolytic anemia (with the characteristic hallmark of schistocytes in the peripheral blood smear), thrombocytopenia and organ malfunction of variable intensity. Thrombotic thrombocytopenic purpura and hemolytic uremic syndrome are the most important forms of TMA and, without the adequate treatment, they are associated with high morbimortality. In recent years, significant advances in the knowledge of the pathophysiology of TMA have occurred. Those advances have allowed us to move from a syndromic diagnosis with a similar treatment to all entities to the search of etiologic diagnosis which would lead to a specific treatment, finally leading to a better outcome of the patient. This document pretends to summarize the current status of knowledge of the pathophysiology of TMA and the therapeutic options available, and to offer a diagnostic and therapeutic practical tool to the professionals caring for the patients.
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Rossio R, Lotta LA, Pontiggia S, Borsa NG, Garagiola I, Ardissino G, Mikovic D, Cugno M, Peyvandi F. A novel CD46 mutation in a patient with microangiopathy clinically resembling thrombotic thrombocytopenic purpura and normal ADAMTS13 activity. Haematologica 2014; 100:e87-9. [PMID: 25381125 DOI: 10.3324/haematol.2014.111062] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Raffaella Rossio
- Angelo Bianchi Bonomi Hemophilia and Thrombosis Center, Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico, Department of Pathophysiology and Transplantation, University of Milan and Luigi Villa Foundation, Milan, Italy
| | - Luca Andrea Lotta
- Angelo Bianchi Bonomi Hemophilia and Thrombosis Center, Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico, Department of Pathophysiology and Transplantation, University of Milan and Luigi Villa Foundation, Milan, Italy
| | - Silvia Pontiggia
- Angelo Bianchi Bonomi Hemophilia and Thrombosis Center, Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico, Department of Pathophysiology and Transplantation, University of Milan and Luigi Villa Foundation, Milan, Italy
| | - Nicolò Ghiringhelli Borsa
- Laboratory of Medical Genetics, Center for HUS Control Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico, Milan, Italy
| | - Isabella Garagiola
- Angelo Bianchi Bonomi Hemophilia and Thrombosis Center, Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico, Department of Pathophysiology and Transplantation, University of Milan and Luigi Villa Foundation, Milan, Italy
| | - Gianluigi Ardissino
- Center for HUS Control, Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico, Milan, Italy
| | - Danijela Mikovic
- Blood Transfusion Institute of Serbia, Svetog Save 39, Belgrade, Serbia
| | - Massimo Cugno
- Internal Medicine, Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico, Department of Pathophysiology and Transplantation, University of Milan, Italy
| | - Flora Peyvandi
- Angelo Bianchi Bonomi Hemophilia and Thrombosis Center, Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico, Department of Pathophysiology and Transplantation, University of Milan and Luigi Villa Foundation, Milan, Italy
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17
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Abstract
The recombinant humanized monoclonal antibody eculizumab (Soliris(®)) is a complement inhibitor that is indicated for use in the treatment of atypical haemolytic uraemic syndrome (aHUS). This article reviews the clinical efficacy and tolerability of eculizumab in the treatment of patients with aHUS, as well as summarizing its pharmacological properties. Intravenous eculizumab inhibited complement-mediated thrombotic microangiopathy in patients aged ≥12 years with aHUS, according to the results of two noncomparative, multinational, 26-week, phase II trials. At 26 weeks, the platelet count was significantly increased in patients with progressing thrombotic microangiopathy despite plasma exchange/infusion, and thrombotic microangiopathic event-free status was achieved in 80 % of patients with a long disease duration and chronic kidney disease who received long-term plasma exchange/infusion. Renal function and health-related quality of life also improved with eculizumab therapy in both studies. Outcomes were maintained or further improved throughout 2 years of follow-up. Eculizumab was also effective in adult and paediatric patients with aHUS, according to the results of additional prospective or retrospective trials. Intravenous eculizumab was generally well tolerated in patients with aHUS. Eculizumab is associated with an increased susceptibility to meningococcal infection, so patients should be immunized with meningococcal vaccine. In conclusion, eculizumab is a valuable new agent for use in the treatment of aHUS.
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Affiliation(s)
- Gillian M Keating
- Adis, 41 Centorian Drive, Private Bag 65901, Mairangi Bay, North Shore, 0754, Auckland, New Zealand,
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18
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Abstract
Acute renal failure associated with a fulminant, life-threatening systemic disease is rare in previously healthy young children; however, when it occurs, the most common cause is hemolytic-uremic syndrome (HUS). In most cases (90%), this abrupt and devastating illness is a result of ingestion of food or drink contaminated with pathogens that produce very potent toxins. Currently, there are no proven treatment options that can directly inactivate the toxin or effectively interfere with the cascade of destructive events triggered by the toxin once it gains access to the bloodstream and binds its receptor. However, HUS is self-limited, and effective supportive management during the acute phase is proven to be a life saver for children affected by HUS. A minority of childhood HUS cases, approximately 5%, are caused by various genetic mutations causing uncontrolled activation of the complement system. These children, who used to have a poor prognosis leading to end-stage renal disease, now have access to exciting new treatment options that can preserve kidney function and avoid disease recurrences. This review provides a summary of the current knowledge on the epidemiology, pathophysiology, and clinical presentation of childhood HUS, focusing on a practical approach to best management measures.
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Affiliation(s)
- Silviu Grisaru
- University of Calgary, Alberta Children's Hospital, Calgary, Alberta, Canada
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20
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Ardissino G, Possenti I, Tel F, Testa S, Paglialonga F. Time to change the definition of hemolytic uremic syndrome. Eur J Intern Med 2014; 25:e29. [PMID: 24360866 DOI: 10.1016/j.ejim.2013.12.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Revised: 11/29/2013] [Accepted: 12/02/2013] [Indexed: 12/25/2022]
Affiliation(s)
- Gianluigi Ardissino
- Center for HUS Prevention, Control and Management, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, via della Commenda 9, 20122 Milan, Italy.
| | - Ilaria Possenti
- Center for HUS Prevention, Control and Management, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, via della Commenda 9, 20122 Milan, Italy
| | - Francesca Tel
- Center for HUS Prevention, Control and Management, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, via della Commenda 9, 20122 Milan, Italy
| | - Sara Testa
- Center for HUS Prevention, Control and Management, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, via della Commenda 9, 20122 Milan, Italy
| | - Fabio Paglialonga
- Center for HUS Prevention, Control and Management, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, via della Commenda 9, 20122 Milan, Italy
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