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Mulder AHL, Castelijn DAR, van der Pol P, Vermeer M, Hollander JC, Kuiper T, Bijnens C, Bontkes HJ, Damoiseaux J. Monitoring patients with celiac disease on gluten free diet: different outcomes comparing three tissue transglutaminase IgA assays. Clin Chem Lab Med 2024; 62:674-681. [PMID: 37943101 DOI: 10.1515/cclm-2023-1076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 10/24/2023] [Indexed: 11/10/2023]
Abstract
OBJECTIVES Tissue transglutaminase (tTG) IgA antibodies are a hallmark for celiac disease (CD). In CD patients on gluten free diet (GFD) these antibodies are transient. Few studies are available comparing the tTG-IgA assay characteristics for monitoring response to GFD. Since discrepant results were reported in patients on GFD after switching tTG-IgA assays, we conducted a retrospective observational study to monitor GFD response using three different tTG-IgA assays. METHODS Diagnostic samples from 44 adults and 17 children with CD were included. Of most patients two follow-up samples after introduction of GFD were available. In all samples tTG-IgA were assessed using one fluorochrome-enzyme immuno-assay (FEIA) and two chemiluminescence immuno-assays (CLIA) and intestinal fatty acid binding protein (i-FABP) as surrogate marker for intestinal epithelial damage was measured. RESULTS Using CLIA assays, normalization of antibody levels was delayed compared to FEIA (p<0.001). Of all samples taken after at least 6 months on GFD with elevated i-FABP indicating intestinal epithelial damage, 40 % had positive tTG-IgA according to the FEIA, 85 and 90 % according to the two CLIA. CONCLUSIONS Normalization of tTG-IgA in patients on GFD depends on the assay used. Both CLIA appear to be more sensitive in detecting suboptimal treatment response in CD-indicated by elevated i-FABP - when applying the manufacturer's recommended cut-off for the diagnosis of CD.
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Affiliation(s)
- A H Leontine Mulder
- Clinical Laboratory, Unilabs, Enschede, The Netherlands
- Department of Clinical Chemistry, Ziekenhuis Groep Twente, Almelo, The Netherlands
| | - Daan A R Castelijn
- Department of Clinical Chemistry, Laboratory Medical Immunology, Amsterdam, The Netherlands
- Amsterdam Institute for Infection and Immunity, Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam, The Netherlands
| | - Pieter van der Pol
- Medical Laboratories, Department of Immunology, Reinier Haga MDC, Delft, The Netherlands
| | - Marloes Vermeer
- Medical School, Ziekenhuis Groep Twente, Almelo, The Netherlands
| | - Jolien C Hollander
- Department of Clinical Chemistry, Laboratory Medical Immunology, Amsterdam, The Netherlands
| | - Tietie Kuiper
- Clinical Laboratory, Unilabs, Enschede, The Netherlands
| | - Caroline Bijnens
- Central Diagnostic Laboratory, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Hetty J Bontkes
- Department of Clinical Chemistry, Laboratory Medical Immunology, Amsterdam, The Netherlands
| | - Jan Damoiseaux
- Central Diagnostic Laboratory, Maastricht University Medical Center, Maastricht, The Netherlands
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Castelijn DAR, Mulder AHL, van der Pol P, Hollander JC, Kuiper T, Bijnens C, Damoiseaux J, Bontkes HJ. Multicenter study to compare the diagnostic performance of CLIA vs. FEIA transglutaminase IgA assays for the diagnosis of celiac disease. Clin Chem Lab Med 2023; 61:1446-1454. [PMID: 36857146 DOI: 10.1515/cclm-2022-1045] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Accepted: 02/16/2023] [Indexed: 03/02/2023]
Abstract
OBJECTIVES Celiac disease (CD) is an immune-mediated enteropathy driven by gluten intake. Presence of tTG-IgA antibodies is important for the diagnosis. However, different tTG-IgA assays are used and test performance may vary. Therefore, a retrospective multicenter study was performed to compare the diagnostic performance of three assays. METHODS The fluorescence enzyme-linked immunoassay (FEIA) EliA Celikey IgA (Phadia), the chemiluminescence immunoassays (CLIA) h-tTG IgA QUANTA Flash® (Inova Diagnostics) and the anti-tTG ChLIA IgA (Euroimmun) were compared. Diagnostic samples from CD cases (95 adults; 65 children) and controls (479 adults; 253 children) were included. Samples were blinded and reanalyzed on all platforms. RESULTS A high quantitative correlation between platforms was found (p<0.0001). Both CLIA were more sensitive (adults 100%; children 100%) compared to the FEIA (adults 88.4%; children 96.6%). Specificity of all assays was high (≥97.6%) with the FEIA having the highest specificity. A cut-off based on receiver operator characteristic analysis (6.5 U/mL) improved the sensitivity of the FEIA (adults 95.8%; children 100%) without affecting specificity. Cut-off values for the CLIA assays did not need further optimization. With the FEIA, 71% of pediatric cases had a tTG-IgA level ≥10× upper limit of normal compared to 91 and 92% with QUANTA Flash and ChLIA, respectively. CONCLUSIONS All platforms have high diagnostic accuracy. The CLIA assays are more sensitive compared to the FEIA assay. A lower cut-off for the FEIA improves diagnostic performance, particularly in adult cases that, as demonstrated in this study, present with lower tTG-IgA levels compared to pediatric cases.
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Affiliation(s)
- Daan A R Castelijn
- Laboratory Medical Immunology , Department of Clinical Chemistry , Amsterdam UMC, Location VUMC, The Netherlands; and Amsterdam Institute for Infection and Immunity, Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam, The Netherlands
| | - A H Leontine Mulder
- Clinical Laboratory, Medlon B.V., Enschede, The Netherlands
- Department of Clinical Chemistry, Ziekenhuis Groep Twente, Almelo, The Netherlands
| | - Pieter van der Pol
- Medical Laboratories , Department of Immunology, Reinier Haga MDC, Delft, The Netherlands
| | - Jolien C Hollander
- Laboratory Medical Immunology , Department of Clinical Chemistry , Amsterdam UMC, Location VUMC, The Netherlands; and Amsterdam Institute for Infection and Immunity, Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam, The Netherlands
| | - Tietie Kuiper
- Clinical Laboratory, Medlon B.V., Enschede, The Netherlands
| | - Caroline Bijnens
- Central Diagnostic Laboratory, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Jan Damoiseaux
- Central Diagnostic Laboratory, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Hetty J Bontkes
- Laboratory Medical Immunology , Department of Clinical Chemistry , Amsterdam UMC, Location VUMC, The Netherlands; and Amsterdam Institute for Infection and Immunity, Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam, The Netherlands
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3
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Platteel ACM, van der Pol P, Murk JL, Verbrugge-Bakker I, Hack-Steemers M, Roovers THWM, Heron M. A comprehensive comparison between ISAC and ALEX 2 multiplex test systems. Clin Chem Lab Med 2022; 60:1046-1052. [PMID: 35470638 DOI: 10.1515/cclm-2022-0191] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 04/04/2022] [Indexed: 11/15/2022]
Abstract
OBJECTIVES Diagnosis of type I hypersensitivity is based on anamnesis, provocation as well as blood- and skin testing. Multiplex specific IgE (sIgE) testing enables determination of sIgE antibodies against multiple recombinant or purified natural allergen components. The aim of this study was to evaluate the performance of the novel ALEX2® (Allergy Explorer, ALEX2 test introduced on the market November 2019) multiplex platform and to compare it with the ImmunoCAP ISAC® test system. METHODS Serum samples of 49 patients, routinely determined with ISAC, were selected based on positive results covering in total most of the 112 ISAC components. Cohen's kappa, negative percent agreement (NPA), and positive percent agreement (PPA) of ALEX2 data compared to ISAC data (as a non-reference standard) were computed for those allergen components present on both platforms (n=103). Furthermore, in some samples sIgE results against allergen extracts and/or -components tested with either ImmunoCAP® (ThermoFisher) or IMMULITE® (Siemens) were available and compared to ALEX2 results. RESULTS The overall agreement between ISAC and ALEX2 common allergen components was 94%. NPA and PPA were respectively 95 and 90%. Kappa values differed for specific allergen groups and varied between 0.60 and 0.92 showing moderate to almost perfect agreement. Of the qualitative discrepancies between ALEX2 and ISAC, 59% were related to weak positive results i.e. results under 1 kUA/L or 1 ISU, respectively. CONCLUSIONS The method comparison between ISAC and ALEX2 multiplex tests showed a high concordance for those allergen components present on both platforms.
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Affiliation(s)
- Anouk C M Platteel
- Microvida Laboratory of Medical Microbiology and Immunology, Elisabeth-TweeSteden Ziekenhuis, Tilburg, Noord-Brabant, Netherlands
| | - Pieter van der Pol
- Microvida Laboratory of Medical Microbiology and Immunology, Elisabeth-TweeSteden Ziekenhuis, Tilburg, Noord-Brabant, Netherlands
| | - Jean-Luc Murk
- Microvida Laboratory of Medical Microbiology and Immunology, Elisabeth-TweeSteden Ziekenhuis, Tilburg, Noord-Brabant, Netherlands
| | - Ingrid Verbrugge-Bakker
- Microvida Laboratory of Medical Microbiology and Immunology, Elisabeth-TweeSteden Ziekenhuis, Tilburg, Noord-Brabant, Netherlands
| | - Marian Hack-Steemers
- Microvida Laboratory of Medical Microbiology and Immunology, Elisabeth-TweeSteden Ziekenhuis, Tilburg, Noord-Brabant, Netherlands
| | - Theo H W M Roovers
- Department of Allergology, Elisabeth-TweeSteden Ziekenhuis, Tilburg, Noord-Brabant, Netherlands
| | - Michiel Heron
- Medische micobiologie en immunologie, Diakonessenhuis Utrecht Zeist Doorn Locatie Utrecht, Bosboomstraat 1, Utrecht, 3508 TG, Utrecht, NETHERLANDS
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Rijkers G, Murk JL, Wintermans B, van Looy B, van den Berge M, Veenemans J, Stohr J, Reusken C, van der Pol P, Reimerink J. Differences in Antibody Kinetics and Functionality Between Severe and Mild Severe Acute Respiratory Syndrome Coronavirus 2 Infections. J Infect Dis 2020; 222:1265-1269. [PMID: 32726417 PMCID: PMC7454692 DOI: 10.1093/infdis/jiaa463] [Citation(s) in RCA: 108] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 07/23/2020] [Indexed: 01/08/2023] Open
Abstract
We determined and compared the humoral immune response in patients with severe (hospitalized) and mild (nonhospitalized) coronavirus disease 2019 (COVID-19). Patients with severe disease (n = 38) develop a robust antibody response to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), including immunoglobulin G and immunoglobulin A antibodies. The geometric mean 50% virus neutralization titer is 1:240. SARS-CoV-2 infection was found in hospital personnel (n = 24), who developed mild symptoms necessitating leave of absence and self-isolation, but not hospitalization; 75% developed antibodies, but with low/absent virus neutralization (60% with titers <1:20). While severe COVID-19 patients develop a strong antibody response, mild SARS-CoV-2 infections induce a modest antibody response. Long-term monitoring will show whether these responses predict protection against future infections.
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Affiliation(s)
- Ger Rijkers
- Department of Medical Microbiology and Immunology, Admiral De Ruyter Hospital, Goes, The Netherlands.,Microvida, location St Elisabeth-Tweesteden Hospital, Tilburg, The Netherlands.,Science Department, University College Roosevelt, Middelburg, The Netherlands
| | - Jean-Luc Murk
- Microvida, location St Elisabeth-Tweesteden Hospital, Tilburg, The Netherlands
| | - Bas Wintermans
- Department of Medical Microbiology and Immunology, Admiral De Ruyter Hospital, Goes, The Netherlands.,Department of Medical Microbiology, Bravis Hospital, Roosendaal, The Netherlands
| | - Bieke van Looy
- Department of Medical Microbiology and Immunology, Admiral De Ruyter Hospital, Goes, The Netherlands
| | - Marcel van den Berge
- Department of Internal Medicine, Admiral De Ruyter Hospital, Goes, The Netherlands
| | - Jacobien Veenemans
- Department of Medical Microbiology and Immunology, Admiral De Ruyter Hospital, Goes, The Netherlands
| | - Joep Stohr
- Microvida, location St Elisabeth-Tweesteden Hospital, Tilburg, The Netherlands
| | - Chantal Reusken
- World Health Organization COVID-19 Reference Laboratory, Center for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
| | - Pieter van der Pol
- Department of Medical Microbiology and Immunology, Admiral De Ruyter Hospital, Goes, The Netherlands
| | - Johan Reimerink
- World Health Organization COVID-19 Reference Laboratory, Center for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
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5
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Bank JR, van der Pol P, Vreeken D, Monge-Chaubo C, Bajema IM, Schlagwein N, van Gijlswijk DJ, van der Kooij SW, Reinders MEJ, de Fijter JW, van Kooten C. Kidney injury molecule-1 staining in renal allograft biopsies 10 days after transplantation is inversely correlated with functioning proximal tubular epithelial cells. Nephrol Dial Transplant 2018; 32:2132-2141. [PMID: 29045706 DOI: 10.1093/ndt/gfx286] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 08/21/2017] [Indexed: 01/21/2023] Open
Abstract
Background Kidney injury molecule-1 (KIM-1) and neutrophil gelatinase-associated lipocalin (NGAL) are promising biomarkers for monitoring delayed graft function (DGF) after kidney transplantation. Here we investigated localization and distribution of KIM-1 and NGAL staining in renal allograft biopsies and studied their association with histological features, functional DGF (fDGF) and the tubular function slope (TFS), a functioning proximal tubular epithelial cell (PTEC) marker. Methods Day 10 protocol biopsies of 64 donation after circulatory death recipients were stained for KIM-1 and NGAL and the positive area was quantified using ImageJ software. Biopsies were scored according to Banff and acute tubular necrosis (ATN) criteria. A 99mtechnetium-mercaptoacetyltriglycine (99mTc-MAG3)-renography was performed to calculate TFS. Results KIM-1 staining was located on the brush border of tubular epithelial cells (TECs) and correlated with denudation, while NGAL was present more focally in a cytoplasmic distribution. KIM-1 and NGAL staining were not correlated and no co-localization was observed. Quantitative stainings were not associated with fDGF, but KIM-1 tended to be higher in patients with prolonged fDGF (≥21 days; P = 0.062). No correlation was observed between the quantitative tissue stainings and urinary KIM-1 or NGAL. Quantitative KIM-1 staining was inversely correlated with the TFS (Spearman's ρ = -0.53; P < 0.001), whereas NGAL was not. The latter finding might be because cortical NGAL staining is dependent on filtration and subsequent reabsorption by functioning PTECs. Staining of NGAL was indeed restricted to PTECs, as shown by co-localization with a PTEC-specific lectin. Conclusions KIM-1 and NGAL staining showed different localization and distribution. Quantitative KIM-1 staining was inversely correlated with functioning PTECs.
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Affiliation(s)
- Jonna R Bank
- Department of Internal Medicine/Nephrology, Leiden University Medical Center, Leiden, The Netherlands
| | - Pieter van der Pol
- Department of Internal Medicine/Nephrology, Leiden University Medical Center, Leiden, The Netherlands
| | - Dianne Vreeken
- Department of Internal Medicine/Nephrology, Leiden University Medical Center, Leiden, The Netherlands
| | - Catherine Monge-Chaubo
- Department of Internal Medicine/Nephrology, Leiden University Medical Center, Leiden, The Netherlands
| | - Ingeborg M Bajema
- Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands
| | - Nicole Schlagwein
- Department of Internal Medicine/Nephrology, Leiden University Medical Center, Leiden, The Netherlands
| | - Daniëlle J van Gijlswijk
- Department of Internal Medicine/Nephrology, Leiden University Medical Center, Leiden, The Netherlands
| | - Sandra W van der Kooij
- Department of Internal Medicine/Nephrology, Leiden University Medical Center, Leiden, The Netherlands
| | - Marlies E J Reinders
- Department of Internal Medicine/Nephrology, Leiden University Medical Center, Leiden, The Netherlands
| | - Johan W de Fijter
- Department of Internal Medicine/Nephrology, Leiden University Medical Center, Leiden, The Netherlands
| | - Cees van Kooten
- Department of Internal Medicine/Nephrology, Leiden University Medical Center, Leiden, The Netherlands
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van der Pol P, Bakker-Jonges LE, Kuijpers JHSAM, Schreurs MWJ. Analytical and clinical comparison of two fully automated immunoassay systems for the detection of autoantibodies to extractable nuclear antigens. Clin Chim Acta 2017; 476:154-159. [PMID: 29170107 DOI: 10.1016/j.cca.2017.11.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 11/02/2017] [Accepted: 11/17/2017] [Indexed: 12/18/2022]
Abstract
BACKGROUND Detection of antinuclear antibodies (ANA) by indirect immunofluorescence assay (IIFA) is increasingly substituted by fully automated solid phase immunoassays. This study evaluated the performance of an automated chemiluminescence immunoassay (CIA) and fluorescence enzyme immunoassay (FEIA) and compared their performance to that of IIFA. METHODS The study included an unselected prospective study population suspected of systemic autoimmune rheumatic disease. ANA were measured by IIFA, while in parallel sera were tested by CIA QUANTA Flash CTD Screen Plus on the BIO-FLASH® and FEIA EliA CTD Screen on the Phadia® 250 system. As validation, retrospective cohorts of patients with ANA-associated rheumatic disease (AARD) and healthy controls were tested. RESULTS Prospectively, sensitivity of IIFA, CIA and FEIA was 90%, 99% and 92%, respectively. Specificity was 76%, 76% and 84%, respectively. Total percent agreements between the three methods were 75.2% (IIFA vs. CIA), 79.2% (IIFA vs. FEIA) and 85.4% (FEIA vs. CIA). The AUC values were 0.95 for CIA and 0.93 for FEIA and did not significantly differ. Retrospectively in individual AARD cohorts, similar results were obtained comparing both CTD screens. CONCLUSIONS Both FEIA and CIA CTD screen significantly outperformed IIFA, with a higher specificity for FEIA and higher sensitivity for CIA. Based on ROC analysis, major contributor to the difference between the two solid phase immunoassays was the cut-off.
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Affiliation(s)
- Pieter van der Pol
- Medical Laboratories, Department of Immunology, Reinier Haga MDC, Delft, The Netherlands.
| | | | - Jac H S A M Kuijpers
- Department of Immunology, Erasmus MC, University Medical Center, Rotterdam, The Netherlands
| | - Marco W J Schreurs
- Department of Immunology, Erasmus MC, University Medical Center, Rotterdam, The Netherlands
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7
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Bijkerk R, van der Pol P, Khairoun M, van Gijlswijk-Jansen DJ, Lievers E, de Vries APJ, de Koning EJ, de Fijter HW, Roelen DL, Vossen RHAM, van Zonneveld AJ, van Kooten C, Reinders MEJ. Simultaneous pancreas-kidney transplantation in patients with type 1 diabetes reverses elevated MBL levels in association with MBL2 genotype and VEGF expression. Diabetologia 2016; 59:853-8. [PMID: 26768002 PMCID: PMC4779124 DOI: 10.1007/s00125-015-3858-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Accepted: 12/14/2015] [Indexed: 12/15/2022]
Abstract
AIMS/HYPOTHESIS High levels of circulating mannan-binding lectin (MBL) are associated with the development of diabetic nephropathy and hyperglycaemia-induced vasculopathy. Here, we aimed to assess the effect of glycaemic control on circulating levels of MBL and the relationship of these levels with vascular damage. METHODS We assessed MBL levels and corresponding MBL2 genotype, together with vascular endothelial growth factor (VEGF) levels as a marker of vascular damage, in type 1 diabetes patients with diabetic nephropathy before and after simultaneous pancreas-kidney (SPK) transplantation. We included diabetic nephropathy patients (n = 21), SPK patients (n = 37), healthy controls (n = 19), type 1 diabetes patients (n = 15) and diabetic nephropathy patients receiving only a kidney transplant (n = 15). Fourteen diabetic nephropathy patients were followed up for 12 months after SPK. RESULTS We found elevated circulating MBL levels in diabetic nephropathy patients, and a trend towards elevated circulating MBL levels in type 1 diabetes patients, compared with healthy control individuals. MBL levels in SPK patients completely normalised and our data indicate that this predominantly occurs in patients with a polymorphism in the MBL2 gene. By contrast, MBL levels in kidney transplant only patients remained elevated, suggesting that glycaemic control but not reversal of renal failure is associated with decreased MBL levels. In line, levels of glucose and HbA1c, but not creatinine levels and estimated GFR, were correlated with MBL levels. VEGF levels were associated with levels of MBL and HbA1c in an MBL-polymorphism-dependent manner. CONCLUSIONS/INTERPRETATION Taken together, circulating MBL levels are associated with diabetic nephropathy and are dependent on glycaemic control, possibly in an MBL2-genotype-dependent manner.
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Affiliation(s)
- Roel Bijkerk
- Department of Nephrology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, the Netherlands.
- Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands.
| | - Pieter van der Pol
- Department of Nephrology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, the Netherlands
| | - Meriem Khairoun
- Department of Nephrology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, the Netherlands
| | | | - Ellen Lievers
- Department of Nephrology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, the Netherlands
| | - Aiko P J de Vries
- Department of Nephrology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, the Netherlands
| | - Eelco J de Koning
- Department of Nephrology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, the Netherlands
| | - Hans W de Fijter
- Department of Nephrology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, the Netherlands
| | - Dave L Roelen
- Department of Immunohaematology and Blood Transfusion, Leiden University Medical Center, Leiden, the Netherlands
| | - Rolf H A M Vossen
- Department of Clinical Genetics, Leiden University Medical Center, Leiden, the Netherlands
| | - Anton Jan van Zonneveld
- Department of Nephrology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, the Netherlands
- Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Cees van Kooten
- Department of Nephrology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, the Netherlands
| | - Marlies E J Reinders
- Department of Nephrology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, the Netherlands
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8
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O'Flynn J, van der Pol P, Dixon KO, Prohászka Z, Daha MR, van Kooten C. Monomeric C-reactive protein inhibits renal cell-directed complement activation mediated by properdin. Am J Physiol Renal Physiol 2016; 310:F1308-16. [PMID: 26984957 DOI: 10.1152/ajprenal.00645.2014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Accepted: 03/11/2016] [Indexed: 01/08/2023] Open
Abstract
Previous studies have shown that complement activation on renal tubular cells is involved in the induction of interstitial fibrosis and cellular injury. Evidence suggests that the tubular cell damage is initiated by the alternative pathway (AP) of complement with properdin having an instrumental role. Properdin is a positive regulator of the AP, which can bind necrotic cells as well as viable proximal tubular epithelial cells (PTECs), inducing complement activation. Various studies have indicated that in the circulation there is an unidentified inhibitor of properdin. We investigated the ability of C-reactive protein (CRP), both in its monomeric (mCRP) and pentameric (pCRP) form, to inhibit AP activation and injury in vitro on renal tubular cells by fluorescent microscopy, ELISA, and flow cytometry. We demonstrated that preincubation of properdin with normal human serum inhibits properdin binding to viable PTECs. We identified mCRP as a factor able to bind to properdin in solution, thereby inhibiting its binding to PTECs. In contrast, pCRP exhibited no such binding and inhibitory effect. Furthermore, mCRP was able to inhibit properdin-directed C3 and C5b-9 deposition on viable PTECs. The inhibitory ability of mCRP was not unique for viable cells but also demonstrated for binding to necrotic Jurkat cells, a target for properdin binding and complement activation. In summary, mCRP is an inhibitor of properdin in both binding to necrotic cells and viable renal cells, regulating complement activation on the cell surface. We propose that mCRP limits amplification of tissue injury by controlling properdin-directed complement activation by damaged tissue and cells.
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Affiliation(s)
- Joseph O'Flynn
- Department of Nephrology, Leiden University Medical Center, Leiden, The Netherlands; and
| | - Pieter van der Pol
- Department of Nephrology, Leiden University Medical Center, Leiden, The Netherlands; and
| | - Karen O Dixon
- Department of Nephrology, Leiden University Medical Center, Leiden, The Netherlands; and
| | - Zoltán Prohászka
- Third Department of Medicine, Semmelweis University, Budapest, Hungary
| | - Mohamed R Daha
- Department of Nephrology, Leiden University Medical Center, Leiden, The Netherlands; and
| | - Cees van Kooten
- Department of Nephrology, Leiden University Medical Center, Leiden, The Netherlands; and
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Shushimita S, van der Pol P, W.F. de Bruin R, N. M. Ijzermans J, van Kooten C, Dor FJMF. Mannan-Binding Lectin Is Involved in the Protection against Renal Ischemia/Reperfusion Injury by Dietary Restriction. PLoS One 2015; 10:e0137795. [PMID: 26367533 PMCID: PMC4569339 DOI: 10.1371/journal.pone.0137795] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2015] [Accepted: 08/21/2015] [Indexed: 11/19/2022] Open
Abstract
Preoperative fasting and dietary restriction offer robust protection against renal ischemia/reperfusion injury (I/RI) in mice. We recently showed that Mannan-binding lectin (MBL), the initiator of the lectin pathway of complement activation, plays a pivotal role in renal I/RI. Based on these findings, we investigated the effect of short-term DR (30% reduction of total food intake) or three days of water only fasting on MBL in 10-12 weeks old male C57/Bl6 mice. Both dietary regimens significantly reduce the circulating levels of MBL as well as its mRNA expression in liver, the sole production site of MBL. Reconstitution of MBL abolished the protection afforded by dietary restriction, whereas in the fasting group the protection persisted. These data show that modulation of MBL is involved in the protection against renal I/RI induced by dietary restriction, and suggest that the mechanisms of protection induced by dietary restriction and fasting may be different.
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Affiliation(s)
- Shushimita Shushimita
- Department of Surgery, division of Transplant Surgery, Erasmus MC, University Medical Center, Rotterdam, The Netherlands
| | - Pieter van der Pol
- Department of Nephrology, Leiden University Medical Center, Leiden, The Netherlands
| | - Ron W.F. de Bruin
- Department of Surgery, division of Transplant Surgery, Erasmus MC, University Medical Center, Rotterdam, The Netherlands
| | - Jan N. M. Ijzermans
- Department of Surgery, division of Transplant Surgery, Erasmus MC, University Medical Center, Rotterdam, The Netherlands
| | - Cees van Kooten
- Department of Nephrology, Leiden University Medical Center, Leiden, The Netherlands
| | - Frank J. M. F. Dor
- Department of Surgery, division of Transplant Surgery, Erasmus MC, University Medical Center, Rotterdam, The Netherlands
- * E-mail:
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Klop B, van der Pol P, van Bruggen R, Wang Y, de Vries MA, van Santen S, O'Flynn J, van de Geijn GJM, Njo TL, Janssen HW, de Man P, Jukema JW, Rabelink TJ, Rensen PCN, van Kooten C, Cabezas MC. Differential complement activation pathways promote C3b deposition on native and acetylated LDL thereby inducing lipoprotein binding to the complement receptor 1. J Biol Chem 2014; 289:35421-30. [PMID: 25349208 DOI: 10.1074/jbc.m114.573840] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Lipoproteins can induce complement activation resulting in opsonization and binding of these complexes to complement receptors. We investigated the binding of opsonized native LDL and acetylated LDL (acLDL) to the complement receptor 1 (CR1). Binding of complement factors C3b, IgM, C1q, mannose-binding lectin (MBL), and properdin to LDL and acLDL were investigated by ELISA. Subsequent binding of opsonized LDL and acLDL to CR1 on CR1-transfected Chinese Hamster Ovarian cells (CHO-CR1) was tested by flow cytometry. Both native LDL and acLDL induced complement activation with subsequent C3b opsonization upon incubation with normal human serum. Opsonized LDL and acLDL bound to CR1. Binding to CHO-CR1 was reduced by EDTA, whereas MgEGTA only reduced the binding of opsonized LDL, but not of acLDL suggesting involvement of the alternative pathway in the binding of acLDL to CR1. In vitro incubations showed that LDL bound C1q, whereas acLDL bound to C1q, IgM, and properdin. MBL did neither bind to LDL nor to acLDL. The relevance of these findings was demonstrated by the fact that ex vivo up-regulation of CR1 on leukocytes was accompanied by a concomitant increased binding of apolipoprotein B-containing lipoproteins to leukocytes without changes in LDL-receptor expression. In conclusion, CR1 is able to bind opsonized native LDL and acLDL. Binding of LDL to CR1 is mediated via the classical pathway, whereas binding of acLDL is mediated via both the classical and alternative pathways. Binding of lipoproteins to CR1 may be of clinical relevance due to the ubiquitous cellular distribution of CR1.
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Affiliation(s)
- Boudewijn Klop
- From the Departments of Internal Medicine, Diabetes and Vascular Center
| | | | | | - Yanan Wang
- Department of Endocrinology and Metabolic Diseases, Einthoven Laboratory for Experimental Vascular Medicine, and
| | | | | | | | | | | | | | - Peter de Man
- Medical Microbiology, Sint Franciscus Gasthuis, 3004 BA Rotterdam, the Netherlands
| | - J Wouter Jukema
- Department of Cardiology, Leiden University Medical Center, 1006 AN Leiden, the Netherlands, and
| | | | - Patrick C N Rensen
- Department of Endocrinology and Metabolic Diseases, Einthoven Laboratory for Experimental Vascular Medicine, and
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van der Pol P, van Gijlswijk-Jansen DJ, Bijkerk R, de Koning EJ, de Fijter JW, van Kooten C, Reinders ME. Elevated MBL levels in type 1 diabetic patients are reversed after simultaneous pancreas–kidney transplantation. Transpl Immunol 2014. [DOI: 10.1016/j.trim.2014.11.129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Bijkerk R, van Solingen C, de Boer HC, van der Pol P, Khairoun M, de Bruin RG, van Oeveren-Rietdijk AM, Lievers E, Schlagwein N, van Gijlswijk DJ, Roeten MK, Neshati Z, de Vries AAF, Rodijk M, Pike-Overzet K, van den Berg YW, van der Veer EP, Versteeg HH, Reinders MEJ, Staal FJT, van Kooten C, Rabelink TJ, van Zonneveld AJ. Hematopoietic microRNA-126 protects against renal ischemia/reperfusion injury by promoting vascular integrity. J Am Soc Nephrol 2014; 25:1710-22. [PMID: 24610930 DOI: 10.1681/asn.2013060640] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Ischemia/reperfusion injury (IRI) is a central phenomenon in kidney transplantation and AKI. Integrity of the renal peritubular capillary network is an important limiting factor in the recovery from IRI. MicroRNA-126 (miR-126) facilitates vascular regeneration by functioning as an angiomiR and by modulating mobilization of hematopoietic stem/progenitor cells. We hypothesized that overexpression of miR-126 in the hematopoietic compartment could protect the kidney against IRI via preservation of microvascular integrity. Here, we demonstrate that hematopoietic overexpression of miR-126 increases neovascularization of subcutaneously implanted Matrigel plugs in mice. After renal IRI, mice overexpressing miR-126 displayed a marked decrease in urea levels, weight loss, fibrotic markers, and injury markers (such as kidney injury molecule-1 and neutrophil gelatinase-associated lipocalin). This protective effect was associated with a higher density of the peritubular capillary network in the corticomedullary junction and increased numbers of bone marrow-derived endothelial cells. Hematopoietic overexpression of miR-126 increased the number of circulating Lin(-)/Sca-1(+)/cKit(+) hematopoietic stem and progenitor cells. Additionally, miR-126 overexpression attenuated expression of the chemokine receptor CXCR4 on Lin(-)/Sca-1(+)/cKit(+) cells in the bone marrow and increased renal expression of its ligand stromal cell-derived factor 1, thus favoring mobilization of Lin(-)/Sca-1(+)/cKit(+) cells toward the kidney. Taken together, these results suggest overexpression of miR-126 in the hematopoietic compartment is associated with stromal cell-derived factor 1/CXCR4-dependent vasculogenic progenitor cell mobilization and promotes vascular integrity and supports recovery of the kidney after IRI.
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Affiliation(s)
- Roel Bijkerk
- Department of Nephrology, Einthoven Laboratory for Experimental Vascular Medicine
| | - Coen van Solingen
- Department of Nephrology, Einthoven Laboratory for Experimental Vascular Medicine
| | - Hetty C de Boer
- Department of Nephrology, Einthoven Laboratory for Experimental Vascular Medicine
| | | | | | - Ruben G de Bruin
- Department of Nephrology, Einthoven Laboratory for Experimental Vascular Medicine
| | | | | | | | | | - Marko K Roeten
- Department of Nephrology, Einthoven Laboratory for Experimental Vascular Medicine
| | | | | | - Mark Rodijk
- Department of Immunohematology and Blood Transfusion, and
| | | | - Yascha W van den Berg
- Einthoven Laboratory for Experimental Vascular Medicine, Department of Thrombosis and Haemostasis, Leiden University Medical Center, Leiden, The Netherlands
| | - Eric P van der Veer
- Department of Nephrology, Einthoven Laboratory for Experimental Vascular Medicine
| | - Henri H Versteeg
- Einthoven Laboratory for Experimental Vascular Medicine, Department of Thrombosis and Haemostasis, Leiden University Medical Center, Leiden, The Netherlands
| | | | | | | | - Ton J Rabelink
- Department of Nephrology, Einthoven Laboratory for Experimental Vascular Medicine
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13
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Khairoun M, van der Pol P, de Vries DK, Lievers E, Schlagwein N, de Boer HC, Bajema IM, Rotmans JI, van Zonneveld AJ, Rabelink TJ, van Kooten C, Reinders MEJ. Renal ischemia-reperfusion induces a dysbalance of angiopoietins, accompanied by proliferation of pericytes and fibrosis. Am J Physiol Renal Physiol 2013; 305:F901-10. [PMID: 23825073 DOI: 10.1152/ajprenal.00542.2012] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Endothelial cells (ECs) are highly susceptible to hypoxia and easily affected upon ischemia-reperfusion (I/R) during renal transplantation. Pericytes and angiopoeitins play important role in modulating EC function. In the present study, we investigate the effect of renal I/R on the dynamics of angiopoietin expression and its association with pericytes and fibrosis development. Male Lewis rats were subjected to unilateral renal ischemia for 45 min followed by removal of the contralateral kidney. Rats were killed at different time points after reperfusion. Endothelial integrity (RECA-1), pericytes [platelet-derived growth factor receptor-β (PDGFR-β)], angiopoietin-2 (Ang-2)/angiopoietin-1 (Ang-1) expression, and interstitial collagen deposition (Sirius red and α-smooth muscle actin) were assessed using immunohistochemistry and RT-PCR. Our study shows an increase in protein expression of Ang-2 starting at 5 h and remaining elevated up to 72 h, with a consequently higher Ang-2/Ang-1 ratio after renal I/R (P < 0.05 at 48 h). This was accompanied by an increase in protein expression of the pericytic marker PDGFR-β and a loss of ECs (both at 72 h after I/R, P < 0.05). Nine weeks after I/R, when renal function was restored, we observed normalization of the Ang-2/Ang-1 ratio and PDGFR-β expression and increase in cortical ECs, which was accompanied by fibrosis. Renal I/R induces a dysbalance of Ang-2/Ang-1 accompanied by proliferation of pericytes, EC loss, and development of fibrosis. The Ang-2/Ang-1 balance was reversed to baseline at 9 wk after renal I/R, which coincided with restoration of cortical ECs and pericytes. Our findings suggest that angiopoietins and pericytes play an important role in renal microvascular remodeling and development of fibrosis.
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Affiliation(s)
- Meriem Khairoun
- Dept. of Nephrology, Leiden Univ. Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands.
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14
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Eikmans M, de Canck I, van der Pol P, Baan CC, Haasnoot GW, Mallat MJK, Vergunst M, de Meester E, Roodnat JI, Anholts JDH, van Thielen M, Doxiadis IIN, de Fijter JW, van der Linden PJE, van Beelen E, van Kooten C, Kal-van Gestel JA, Peeters AMA, Weimar W, Roelen DL, Rossau R, Claas FHJ. The functional polymorphism Ala258Ser in the innate receptor gene ficolin-2 in the donor predicts improved renal transplant outcome. Transplantation 2012; 94:478-85. [PMID: 22892990 DOI: 10.1097/tp.0b013e31825c5967] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND Innate immunity plays a role in controlling adaptive immune responses. METHODS We investigated the clinical relevance of single nucleotide polymorphisms in 22 genes encoding innate, secreted, and signaling pattern recognition receptors in a total of 520 donor-recipient pairs of postmortem, human leukocyte antigen-DR-compatible kidney transplantations. Associations with rejection incidence were tested in an a priori randomized training set and validation set. RESULTS Polymorphisms in TLR-3 (rs3775296) in the recipients and in ficolin-2 (rs7851696; Ala258Ser) and C1qR1 (rs7492) in the donors showed the strongest association with severe rejection. In multivariate analysis, presence of the ficolin-2 Ala258Ser variant in the donor predicted lower incidence of severe rejection (odds ratio=0.3; 95% confidence interval, 0.1-0.9; P=0.024) and of graft loss (hazard ratio=0.5; 95% confidence interval, 0.2-1.0; P=0.046) independently of clinical risk factors. Ficolin-2 messenger RNA expression was detected in pretransplantation biopsies from 69 donor grafts. Serum and tissue ficolin-2 levels were unaffected by genotype. Ficolin-2 protein, which bound to dying cells, was detected in donor kidneys in a passenger leukocyte-like pattern. Indeed, monocytes, monocyte-derived macrophages, and peripheral blood mononuclear cells expressed ficolin-2. Donor grafts with the ficolin-2 Ala258Ser variant contained significantly elevated expression of interleukin 6, having ascribed cytoprotective effects. It has been described that Ala258Ser leads to increased binding capacity of ficolin-2 to N-acetylglucosamine. CONCLUSIONS Presence of the ficolin-2 Ala258Ser polymorphism in the donor independently predicts improved graft outcome. Based on mechanistic data, we propose that this functional polymorphism leads to more efficient handling of injured cells by phagocytozing cells, resulting in decreased intragraft exposure to danger signals and dampened alloimmune responses.
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Affiliation(s)
- Michael Eikmans
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, the Netherlands.
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15
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Mauriello CT, Pallera HK, Sharp JA, Woltmann JL, Qian S, Hair PS, van der Pol P, van Kooten C, Thielens NM, Lattanzio FA, Cunnion KM, Krishna NK. A novel peptide inhibitor of classical and lectin complement activation including ABO incompatibility. Mol Immunol 2012; 53:132-9. [PMID: 22906481 DOI: 10.1016/j.molimm.2012.07.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Revised: 07/24/2012] [Accepted: 07/30/2012] [Indexed: 12/24/2022]
Abstract
Previous experiments from our laboratories have identified peptides derived from the human astrovirus coat protein (CP) that bind C1q and mannose binding lectin (MBL) inhibiting activation of the classical and lectin pathways of complement, respectively. The purpose of this study was to evaluate the function of these coat protein peptides (CPPs) in an in vitro model of complement-mediated disease (ABO incompatibility), preliminarily assess their in vivo complement suppression profile and develop more highly potent derivatives of these molecules. E23A, a 30 amino acid CPP derivative previously demonstrated to inhibit classical pathway activation was able to dose-dependently inhibit lysis of AB erythrocytes treated with mismatched human O serum. Additionally, when injected into rats, E23A inhibited the animals' serum from lysing antibody-sensitized erythrocytes, providing preliminary in vivo functional evidence that this CPP can cross the species barrier to inhibit serum complement activity in rodents. A rational drug design approach was implemented to identify more potent CPP derivatives, resulting in the identification and characterization of a 15 residue peptide (polar assortant (PA)), which demonstrated both superior inhibition of classical complement pathway activation and robust binding to C1q collagen-like tails. PA also inhibited ABO incompatibility in vitro and demonstrated in vivo complement suppression up to 24h post-injection. CPP's ability to inhibit ABO incompatibility in vitro, proof of concept in vivo inhibitory activity in rats and the development of the highly potent PA derivative set the stage for preclinical testing of this molecule in small animal models of complement-mediated disease.
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Affiliation(s)
- Clifford T Mauriello
- Department of Pediatrics, Eastern Virginia Medical School, 855 West Brambleton Avenue, Norfolk, VA 23510, United States
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van der Pol P, de Vries DK, van Gijlswijk DJ, van Anken GE, Schlagwein N, Daha MR, Aydin Z, de Fijter JW, Schaapherder AF, van Kooten C. Pitfalls in urinary complement measurements. Transpl Immunol 2012; 27:55-8. [DOI: 10.1016/j.trim.2012.06.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Accepted: 06/07/2012] [Indexed: 12/21/2022]
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Zaferani A, Vivès RR, van der Pol P, Navis GJ, Daha MR, van Kooten C, Lortat-Jacob H, Seelen MA, van den Born J. Factor h and properdin recognize different epitopes on renal tubular epithelial heparan sulfate. J Biol Chem 2012; 287:31471-81. [PMID: 22815489 DOI: 10.1074/jbc.m112.380386] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
During proteinuria, renal tubular epithelial cells become exposed to ultrafiltrate-derived serum proteins, including complement factors. Recently, we showed that properdin binds to tubular heparan sulfates (HS). We now document that factor H also binds to tubular HS, although to a different epitope than properdin. Factor H was present on the urinary side of renal tubular cells in proteinuric, but not in normal renal tissues and colocalized with properdin in proteinuric kidneys. Factor H dose-dependently bound to proximal tubular epithelial cells (PTEC) in vitro. Preincubation of factor H with exogenous heparin and pretreatment of PTECs with heparitinase abolished the binding to PTECs. Surface plasmon resonance experiments showed high affinity of factor H for heparin and HS (K(D) values of 32 and 93 nm, respectively). Using a library of HS-like polysaccharides, we showed that chain length and high sulfation density are the most important determinants for glycosaminoglycan-factor H interaction and clearly differ from properdin-heparinoid interaction. Coincubation of properdin and factor H did not hamper HS/heparin binding of one another, indicating recognition of different nonoverlapping epitopes on HS/heparin by factor H and properdin. Finally we showed that certain low anticoagulant heparinoids can inhibit properdin binding to tubular HS, with a minor effect on factor H binding to tubular HS. As a result, these heparinoids can control the alternative complement pathway. In conclusion, factor H and properdin interact with different HS epitopes of PTECs. These interactions can be manipulated with some low anticoagulant heparinoids, which can be important for preventing complement-derived tubular injury in proteinuric renal diseases.
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Affiliation(s)
- Azadeh Zaferani
- Department of Nephrology, University Medical Center, 9713 GZ Groningen, The Netherlands.
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Shushimita S, van der Pol P, de Bruin RWF, IJzermans JNM, van Kooten C, Dor FJMF. Dietary restriction and fasting downregulate complement activity. BMC Proc 2012. [PMCID: PMC3374266 DOI: 10.1186/1753-6561-6-s3-p66] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Kortekaas KA, van der Pol P, Lindeman JH, Baan CC, van Kooten C, Klautz RJ. No prominent role for terminal complement activation in the early myocardial reperfusion phase following cardiac surgery. Eur J Cardiothorac Surg 2012; 41:e117-25. [DOI: 10.1093/ejcts/ezs088] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
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O’Flynn J, Flierman R, van der Pol P, Rops A, Satchell SC, Mathieson PW, van Kooten C, van der Vlag J, Berden JH, Daha MR. Nucleosomes and C1q bound to glomerular endothelial cells serve as targets for autoantibodies and determine complement activation. Mol Immunol 2011; 49:75-83. [DOI: 10.1016/j.molimm.2011.07.020] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2011] [Revised: 07/26/2011] [Accepted: 07/27/2011] [Indexed: 12/31/2022]
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D'Orsogna LJ, Roelen DL, van der Meer-Prins EM, van Besouw NM, van der Pol P, Franke-van Dijk M, Zoet YM, van der Slik A, Weimar W, van Kooten C, Doxiadis II, Claas FH. 61-P Vaccine induced allo-HLA reactive memory T-cells in a kidney transplantation candidate. Hum Immunol 2011. [DOI: 10.1016/j.humimm.2011.07.086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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22
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Eikmans M, de Canck I, van der Pol P, Baan CC, Haasnoot GW, Mallat MJ, Bryson-Vergunst M, de Meester E, Roodnat JI, Anholts JD, van Thielen M, Doxiadis II, de Fijter HW, van der Linden PJ, van Beelen E, van Kooten C, Kal-van Gestel JA, Peeters AM, Weimar W, Roelen DL, Rossau R, Claas FH. 52-OR: A functional polymorphism in Ficolin-2 in the donor kidney is associated with improved renal transplant outcome. Hum Immunol 2011. [DOI: 10.1016/j.humimm.2011.07.297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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van der Pol P, Roos A, Berger SP, Daha MR, van Kooten C. Natural IgM antibodies are involved in the activation of complement by hypoxic human tubular cells. Am J Physiol Renal Physiol 2011; 300:F932-40. [PMID: 21289051 DOI: 10.1152/ajprenal.00509.2010] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Ischemia-reperfusion injury (IRI) has a major impact on graft survival after transplantation. Renal proximal tubular epithelial cells (PTEC) located at the corticomedullary zone are relatively susceptible to IRI and have been identified as one of the main targets of complement activation. Studies in mice have shown an important role for the alternative pathway of complement activation in renal IRI. However, it is unclear whether experimental data obtained in mice can be extrapolated to humans. Therefore, we developed an in vitro model to induce hypoxia-reoxygenation in human and mouse PTEC and studied the role of the different pathways of complement activation. Exposure of human PTEC to hypoxia followed by reoxygenation in human serum resulted in extensive complement activation. Inhibition studies using different complement inhibitors revealed no involvement of the alternative or lectin pathway of complement activation by hypoxic human PTEC. In contrast, complement activation by hypoxic murine PTEC was shown to be exclusively dependent on the alternative pathway. Hypoxic human PTEC induced classic pathway activation, supported by studies in C1q-depleted serum and the use of blocking antibodies to C1q. The activation of the classic pathway was mediated by IgM through interaction with modified phosphomonoesters exposed on hypoxic PTEC. Studies with different human sera showed a strong correlation between IgM binding to hypoxic human PTEC and the degree of complement activation. These results demonstrate important species-specific differences in complement activation by hypoxic PTEC and provide clues for directed complement inhibition strategies in the treatment and prevention of IRI in the human kidney.
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Affiliation(s)
- Pieter van der Pol
- Dept. of Nephrology, Leiden Univ. Medical Center, Leiden, The Netherlands
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Zaferani A, Vivès RR, van der Pol P, Hakvoort JJ, Navis GJ, van Goor H, Daha MR, Lortat-Jacob H, Seelen MA, van den Born J. Identification of tubular heparan sulfate as a docking platform for the alternative complement component properdin in proteinuric renal disease. J Biol Chem 2010; 286:5359-67. [PMID: 21135110 DOI: 10.1074/jbc.m110.167825] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Properdin binds to proximal tubular epithelial cells (PTEC) and activates the complement system via the alternative pathway in vitro. Cellular ligands for properdin in the kidney have not yet been identified. Because properdin interacts with solid-phase heparin, we investigated whether heparan sulfate proteoglycans (HSPG) could be the physiological ligands of properdin. Kidneys from proteinuric rats showed colocalization of syndecan-1, a major epithelial HSPG, and properdin in the apical membranes of PTEC, which was not seen in control renal tissue. In vitro, PTEC did not constitutively express properdin. However, exogenous properdin binds to these cells in a dose-dependent fashion. Properdin binding was prevented by heparitinase pretreatment of the cells and was dose-dependently inhibited by exogenous heparin. ELISA and surface plasmon resonance spectroscopy (BIAcore) showed a strong dose-dependent interaction between heparan sulfate (HS) and properdin (K(d) = 128 nm). Pretreatment of HSPG with heparitinase abolished this interaction in ELISA. Competition assays, using a library of HS-like polysaccharides, showed that sulfation pattern, chain length, and backbone composition determine the interaction of properdin with glycosaminoglycans. Interestingly, two nonanticoagulant heparin derivatives inhibited properdin-HS interaction in ELISA and BIAcore. Incubation of PTEC with human serum as complement source led to complement activation and deposition of C3 on the cells. This C3 deposition is dependent on the binding of properdin to HS as shown by heparitinase pretreatment of the cells. Our data identify tubular HS as a novel docking platform for alternative pathway activation via properdin, which might play a role in proteinuric renal damage. Our study also suggests nonanticoagulant heparinoids may provide renoprotection in complement-dependent renal diseases.
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Affiliation(s)
- Azadeh Zaferani
- Department of Nephrology, University Medical Center, 9713 GZ Groningen, The Netherlands.
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van der Pol P, Roos A, Berger SP, Bajema IM, Stahl GL, Gijlswijk DJ, Schlagwein N, Daha MR, van Kooten C. Inhibition of mannose-binding lectin preserves renal function in a rat model of renal ischemia reperfusion injury. Mol Immunol 2010. [DOI: 10.1016/j.molimm.2010.05.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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