Fokko J van der Woude's research while affiliated with Universität Heidelberg and other places

Publications (145)

Article
During the transplant process, the graft is exposed to numerous events, which may enhance its immunogenicity. In particular, factors related to brain death, such as hemodynamic instability and systemic release of cytokines, cold preservation on harvesting, and reperfusion injury, are known to accumulate in harm, conveying a proinflammatory state to...
Article
To investigate the operating characteristics of the American College of Rheumatology (ACR) traditional format criteria for Wegener's granulomatosis (WG), the Sørensen criteria for WG and microscopic polyangiitis (MPA), and the Chapel Hill nomenclature for WG and MPA. Further, to develop and validate improved criteria for distinguishing WG from MPA...
Article
Full-text available
The (CTG)(n) polymorphism in the serum carnosinase (CN-1) gene affects CN-1 secretion. Since CN-1 is heavily glycosylated and glycosylation might influence protein secretion as well, we tested the role of N-glycosylation for CN-1 secretion and enzyme activity. We also tested whether CN-1 secretion is changed under hyperglycemic conditions. N-glycos...
Article
Full-text available
Catecholamines prevent hypothermic cell death which accounts for severe tissue damage and impaired allograft function after prolonged organ preservation. Here, we identified cellular processes which govern hypothermia-mediated cell death in endothelial cells and how they are influenced by dopamine. Lactate dehydrogenase assay, intracellular ATP, re...
Article
Full-text available
Recently, we demonstrated that a polymorphism in exon 2 of the serum carnosinase (CNDP1) gene is associated with susceptibility to developing diabetic nephropathy. Based on the number of CTG repeats in the signal peptide, five different alleles coding for 4, 5, 6, 7, or 8 leucines (4L-8L) are known. Diabetic patients without nephropathy are homozyg...
Article
Brain death (BD) is associated with profound inflammation in end-organs. Dopamine (DA) treatment reduces this inflammatory response, but the underlying mechanisms remain thus far largely unknown. In this study, we investigated if the anti-inflammatory effect of DA was related to hemodynamic stabilization and by which receptors it was mediated. BD w...
Article
The aim of the present study was to evaluate the effect of donor pretreatment with atorvastatin on ischemia/reperfusion (I/R) injury in renal transplantation in rats. Donor rats were pretreated orally with atorvastatin or vehicle 2 days prior to explantation. Kidneys were stored for 24 hr at 4 degrees C in University of Wisconsin solution and trans...
Article
Endothelial damage and detachment of endothelial cells are known to occur in septic patients. Thus, recruitment of circulating endothelial progenitor cells (cEPCs) to these lesions might have a beneficial effect on the clinical course in septic patients. Therefore, we were interested in whether EPCs, detected by flow cytometry, are increasingly mob...
Article
Full-text available
Systemic vasculitis associated with autoantibodies to neutrophil cytoplasmic antigens (ANCA) is the most frequent cause of rapidly progressive glomerulonephritis. Renal failure at presentation carries an increased risk for ESRD and death despite immunosuppressive therapy. This study investigated whether the addition of plasma exchange was more effe...
Article
The aim of the study was to evaluate the effect of the hypersulfated nonanticoagulant heparin derivative LU 51198 (LU) and of the low molecular weight heparin reviparin (REVI) on ischemia/reperfusion (I/R) injury, acute rejection (AR) and chronic allograft nephropathy (CAN) in rats. Organs were harvested 5 days after 60 min of renal I/R injury. For...
Article
In the present study, we used the Brown-Norway (BN) to Lewis model as a model for acute rejection, to test the hypothesis that dopamine (DA) treatment of BN donors significantly reduces the inflammatory response after renal transplantation. BN and Lewis rats (isograft controls) were treated for 24 hr with DA (5 microg/kg/min) or NaCl (0.9%), respec...
Article
Angiotensin-converting enzyme inhibitors and angiotensin II (AngII) type 1 receptor blockers lower proteinuria and preserve renal function in diabetic nephropathy (DN). The antiproteinuric effects are greater than their blood pressure reduction, involving the sieving properties of the glomerular filter. In DN, glomerular staining for heparan sulfat...
Article
Adequate volume maintenance is essential to prevent acute renal failure during major surgery or to ensure graft function after renal transplantation. The various recommendations on the optimum fluid therapy are based, at best, on sparse evidence only from observational studies. This article reviews the literature on perioperative fluid management i...
Article
Donor dopamine usage is associated with improved immediate graft function after renal transplantation. Although prolonged cold preservation results in an increased vascular permeability, the present study was conducted to examine in vitro and in vivo if dopamine pretreatment influences endothelial barrier function under such conditions. To assess c...
Article
Full-text available
Although in antineutrophil cytoplasmic autoantibodies (ANCA)-associated systemic vasculitis (AASV) patients, activation of T-cells has been described, persistence of these alterations has not been well characterized. This study was conducted to define persistent T-cell activation (PTA) in AASV patients and to assess whether this correlates with dis...
Article
Hyperglycemia-induced mitochondrial overproduction of reactive oxygen species leads to the activation of different biochemical pathways involved in endothelial damage of the diabetic retina. Tenilsetam [(+/-)-3-(2-thienyl)-2-piperazinone] is a dicarbonyl scavenger in the millimolar range and a transition metal ion chelator in the micromolar range....
Article
Antineutrophil cytoplasmic antibodies (ANCAs) are considered by some investigators to be sensitive markers of disease activity and have been suggested to predict relapse and guide therapeutic decisions. Studies using serial ANCA monitoring in patients with ANCA-associated vasculitis (AASV) have yielded controversial results during the last 15 years...
Article
Full-text available
Methylene bis(thiocyanate) (MBT) is a microbiocidal agent mainly used in industrial water cooling systems and paper mills as an inhibitor of algae, fungi, and bacteria. We describe the first case of severe intoxication following inhalation of powder in an industrial worker. Profound cyanosis and respiratory failure caused by severe methemoglobinemi...
Article
Full-text available
Here we compare the efficacy of cyclophosphamide (CYC) for treatment of crescentic nephritis (CGN) with the newer immunosuppressants 15-deoxyspergualin (DSG) and mycophenolate mofetil (MMF) in SCG/Kj mice, an inbred mouse strain that spontaneously develops CGN, systemic necrotizing vasculitis and antineutrophil cytoplasmic antibodies (ANCAs). Mice...
Article
Full-text available
The risk of diabetic nephropathy is partially genetically determined. Diabetic nephropathy is linked to a gene locus on chromosome 18q22.3-q23. We aimed to identify the causative gene on chromosome 18 and to study the mechanism by which the product of this gene could be involved in the development of diabetic nephropathy. DNA polymorphisms were det...
Article
Full-text available
A subset of patients with Wegener's granulomatosis does not respond to daily oral cyclophosphamide (CYC) plus corticosteroids or suffers from intolerable side effects. A 6 month course of the immunosuppressant 15-deoxyspergualin (DSG) has previously been employed successfully in these refractory cases. However, there are no reports on long-term tre...
Article
Retrospective transplant database analysis revealed that administration of catecholamines to organ donors reduces acute rejection episodes and improves graft survival after renal transplantation. In the present study, the authors investigated the influence of dopamine donor pretreatment before prolonged cold storage on short- and long-term graft ou...
Article
In Hodgkin's disease, the most common paraneoplastic glomerular abnormality is minimal change nephropathy, although other glomerular diseases occasionally have been described. We report a case of extracapillary immunoglobulin A glomerulonephritis presenting as acute renal failure in a woman with newly diagnosed Hodgkin's disease. Treatment with the...
Article
Full-text available
Large quantitaties of inflammatory mediators are released during the course of endotoxaemia. These mediators in turn can stimulate the sympathetic nervous system (SNS) to release catecholamines, which ultimately regulate inflammation-associated impairment in tissue perfusion, myocardial impairment and vasodilatation. Treatment of sepsis is based on...
Article
Diabetic nephropathy (DN) is a common complication of diabetes types 1 and 2. One of the hallmarks of DN is the development of mesangial expansion, which occurs through accumulation of extracellular matrix (ECM) components. Altered local gene expression of humoral factors (eg, transforming growth factor-b, connective tissue growth factor, and plate...
Article
The development of nephrotic-range proteinuria after renal transplantation is an unfavourable prognostic factor for graft survival. In contrast to that in other nephropathies, the role of renin-angiotensin blockade in kidney transplantation is less well defined, and its anti-proteinuric effect is markedly reduced in the presence of segmental glomer...
Article
During the transplant process, the graft is exposed to numerous events, which may enhance its immunogenicity. In particular, factors related to brain death, such as hemodynamic instability and systemic release of cytokines, cold preservation on harvesting, and reperfusion injury, are known to accumulate in harm, conveying a proinflammatory state to...
Article
During the transplant process, the graft is exposed to numerous events, which may enhance its immunogenicity. In particular, factors related to brain death, such as hemodynamic instability and systemic release of cytokines, cold preservation on harvesting, and reperfusion injury, are known to accumulate in harm, conveying a proinflammatory state to...
Article
Brain death has been identified as an independent risk factor for chronic allograft dysfunction. In two independent retrospective clinical studies, we showed that dopamine treatment of brain-dead donors improves long-term kidney graft survival. The mechanisms underlying the protective effects of dopamine treatment in vivo have not been identified....
Article
A subset of patients with Wegener's granulomatosis does not respond sufficiently to cyclophosphamide and glucocorticosteroids or suffers of intolerable side effects. Anecdotal data suggest that antithymocyte globulin (ATG) may be a treatment option for these patients. We now describe 15 patients treated with ATG for refractory Wegener's granulomato...
Article
In patients with diabetic nephropathy, glomerular staining for heparan sulfate proteoglycans (HSPG) side chains and for agrin is decreased. In the present study, the influence of angiotensin II (AngII) on the production of HSPG in SV40 transformed podocytes was investigated. SV40 transformed human podocytes were cultivated with or without 1 microM...
Article
Antineutrophil cytoplasmic antibodies are closely associated with Wegener granulomatosis, microscopic polyangiitis, and Churg-Strauss syndrome and have contributed to new pathogenetic concepts and improved nomenclature of systemic vasculitides (antineutrophil cytoplasmic antibody-associated vasculitides). However, the application of antineutrophil...
Article
Full-text available
The present study was conducted to dissect the underlying mechanisms by which catecholamines protect cells against preservation injury. To this end, we firstly defined the cellular and molecular differences between protected and nonprotected cells and secondly defined the mediators that were involved in cold-induced damage. Cold storage of untreate...
Article
Full-text available
Heparin and angiotensin-converting enzyme inhibitors can be used as a therapeutic option in diabetic nephropathy (DN). Although the mode of action is poorly understood, both agents may retard the progression of DN. Previously, we demonstrated that angiotensin II (Ang II) has an inhibitory effect on the production of heparan sulphate proteoglycan (H...
Article
Initially described as the most potent vasoconstrictor peptide, endothelin (ET) has also been shown to possess extraordinary immunomodulatory and proinflammatory properties. Because of this broad spectrum of biological activities, a possible role of the ET-system in solid organ transplantation has soon become a focus of research. Several studies de...
Article
Diabetic nephropathy (DN) is the most common cause of renal failure in the western hemisphere. Epidemiological studies have suggested a genetic susceptibility for DN. Linkage analysis showed evidence for a locus on chromosome 18q22.3-q23 in Turkish families. We report the construction of a transcript map of the target region on chromosome 18q22.3-q...
Article
Oxidative stress is markedly increased after kidney transplantation and may participate in the development and/or progression of chronic renal allograft nephropathy. In the present study we sought to assess the nephroprotective potential of antioxidative treatment in renal allograft recipients. Experiments were performed in the Fisher-Lewis rat mod...
Article
background In the present study, we aimed to determine the frequency of a significant reduction in urinary albumin excretion and factors affecting such reduction in patients with type 1 diabetes and microalbuminuria. methods The study included 386 patients with persistent microalbuminuria, indicated by repeat- ed measurements of urinary albumin exc...
Article
Contrast nephropathy is associated with increased in-hospital morbidity and mortality and leads to extension of hospital stay in patients with chronic renal insufficiency. Acetylcysteine seems to be a safe and inexpensive way to reduce contrast nephropathy. We aimed to assess the efficacy of acetylcysteine to prevent contrast nephropathy after admi...
Article
In the pathogenesis of septic shock, caused by either bacterial toxins or trauma, increased production of multiple proinflammatory mediators, such as phospholipase A(2) (PLA(2)), cytokines, and chemokines, is known to be of major importance. The present study was undertaken to investigate the influence of a newly designed extracellular PLA(2) inhib...
Article
Spontaneous crescentic glomerulonephritis-forming/Kinjoh (SCG/Kj) mice spontaneously develop crescentic glomerulonephritis (CGN), systemic vasculitis, and perinuclear ANCA (pANCA), and have been suggested as an animal model for human antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AASV). Since no systematic serologic, immunohistol...
Article
Allorecognition is induced when the host immune system detects alloantigens in the context of danger signals. As an implication of this theory, one should be able to prevent the alloimmune response by eliminating danger signals that could be achieved by modifying the graft before transplantation. Factors that are known to play a role in the inducti...
Article
We have recently demonstrated up-regulation of renal endothelin (ET) synthesis in a rat model of chronic renal allograft rejection. Treatment with a selective ET-A receptor antagonist improved survival and reduced functional and morphological kidney damage. However, the underlying mechanisms have not yet been elucidated, as ET exhibits both hemodyn...
Article
The aim of this study is to analyze the predictive value of clinical, serological, and histological parameters for renal outcome in antineutrophil cytoplasmic autoantibody (ANCA)-associated glomerulonephritis by multivariate analysis and create an index valid for clinical use. Data from 160 patients with Wegener's granulomatosis, microscopic polyan...
Article
The combination of cyclophosphamide (CYC) and oral corticosteroids is effective in the majority of patients with antineutrophil cytoplasmic antibody-associated vasculitis (AASV), but it carries substantial risk of drug-related morbidity and mortality. New regimens are desired, especially in refractory cases. The immunosuppressant 15-deoxyspergualin...
Article
Despite important therapeutic improvements, permanent organ failure may develop in primary systemic vasculitides and affect the heart, the lungs, and especially the kidneys. In systemic vasculitides associated with antineutrophil cytoplasmic antibodies (AASV), end-stage renal failure develops in 20% of cases. Renal transplantation became a benefici...
Article
Acute respiratory distress syndrome (ARDS) is characterized by alterations in microvascular permeability. In ARDS secreted phospholipase A(2) (sPLA(2)) IB and IIA are found to be highly upregulated. In this study, we therefore investigated the influence of exogenously added sPLA(2)-IB and sPLA(2)-IIA on the production of chemokines and adhesion mol...
Article
The application of anti-neutrophil cytoplasmic antibody (ANCA) testing has received much interest since ANCA were discovered [1] and since they were reported to be useful in both the diagnosis and monitoring of disease activity in Wegener’s granulomatosis (WG) [2]. Although there is little doubt that the recognition of the association between the p...
Article
Diabetic nephropathy is the major cause of end-stage renal failure in patients with diabetes mellitus types 1 and 2. Epidemiological studies have suggested a genetic susceptibility to diabetic nephropathy. The aim of this study was to localize the gene(s) responsible for susceptibility to diabetic nephropathy. A genetic linkage analysis was perform...
Article
The kallikrein-kinin system (KKS) was investigated in autosomal dominant polycystic kidney disease (ADPKD)-affected rats (PKD) and compared to unaffected controls (SD) and 5/6 nephrectomized rats (5/6 Nx). In addition, patients with ADPKD compared to patients with nonpolycystic kidney disease and healthy controls have been investigated. Plasma and...
Article
The present study was conducted to investigate whether catecholamines influence the production of chemokines and adhesion molecules in proximal tubular epithelial cells (PTECs) and endothelial cells. PTECs and human umbilical vein endothelial cells (HUVECs) were stimulated with various concentrations of dopamine (DA), adrenaline (AD), or noradrenal...
Article
Although kidney transplantation has become an established clinical procedure, and both short- and long-term graft survival after cadaveric kidney transplantation have improved over the last decade [1], acute and chronic rejection remain a significant problem. Traditionally, the genetic differences in major histocompatibility complex (MHC) class I a...
Article
Unlabelled: Activity and functional significance of the renal kallikrein-kinin-system in polycystic kidney disease of the rat. Background: The kallikrein-kinin-system is a complex multienzymatic system that has been implicated in the control of systemic blood pressure, glomerular filtration rate, and proteinuria. The present study investigated i...
Article
The present study was conducted to examine the possibility of modulating interferon (IFN-gamma)-induced immunogenicity by a novel compound that is composed of a PLA2 inhibitor linked to hyaluronic acid (HYPE). HYPE was tested for its effect on IFN-gamma-induced expression of MHC class I, class II, and intercellular adhesion molecule (ICAM-1) in cul...
Article
Full-text available
Cyclosporine (CsA) is the current primary immunosuppressant for the prevention of renal allograft rejection. Its chronic use is associated with various adverse effects like hypertension, hyperlipidemia, and nephrotoxicity, which in turn may contribute to chronic allograft nephropathy and cardiovascular mortality. This study compares a CsA-free main...
Article
Tubulointerstitial inflammation with infiltration of mononuclear cells plays an important role in acute allograft rejection and in the progression of renal diseases. We therefore investigated in vivo the expression of the costimulatory molecules B7-1 and B7-2 on proximal tubular epithelial cells (PTEC) under normal and pathologic conditions and ana...
Chapter
In patients with diabetic nephropathy (DN), the composition of the mesangium and glomerular basement membrane is changed. Accumulation of extracellular matrix proteins such as collagens, laminin, fibronectin and decreased expression of heparan sulphate proteoglycens (HSPG) are amongst other prominent characteristics that can be observed in DN. Thes...
Article
A variety of antineutrophil cytoplasmic auto-antibodies (ANCAs) are known to be associated with small vessel vasculitides such as Wegener's granulomatosis and microscopic polyangiitis. To visualize colocalization patterns of the fibrinoid necrotic lesions and ANCA-antigens more accurately, we have developed a double staining technique in which an i...
Article
Full-text available
Serum concentrations of catecholamines are high in patients with sepsis or acute respiratory distress syndrome (ARDS). Because chemokines mediate the recruitment of neutrophils into inflammatory sites, we addressed the question of whether dopamine (DA) is able to influence chemokine production in endothelial cells under basal and proinflammatory co...
Article
Antineutrophil cytoplasmic autoantibodies (ANCA) are presumed to reflect disease-activity and to be useful for guidance of immunosuppressive therapy of ANCA-associated systemic vasculitis (AASV), but with respect to conventional ANCA assays this is controversial. ANCA titres, measured in the IgG3 subclass and modern capture ELISAs, have been said t...
Article
In a recent single-center study, donor use of catecholamines was identified to reduce kidney allograft rejection. This study investigates the effects of donor employment of adrenergic agents on graft survival in a large data base, including liver and heart transplants. The study was based on the registry of the Eurotransplant International Foundati...
Article
Low-molecular-weight heparin (LMWH) has been shown to prolong survival of rat cardiac allografts independently from immunosuppressive treatment. Furthermore, long-term treatment reduces the development of chronic graft vascular disease after experimental heart transplantation. The aim of the present study was to determine whether treatment with the...
Article
In a retrospective study of the kidney transplantations performed at our institution, we found that the administration of dopamine (DA) to the organ donors resulted in a significant improvement of long-term organ survival of the retrieved kidneys. To study the mechanisms underlying the organ protection associated with the administration of DA prior...
Article
Untreated, Wegener’s granulomatosis (WG) and microscopic polyangiitis (MPA), the most important ANCA-associated systemic vasculitides (AASV), commonly take a lethal course or result in severe permanent organ damage. Although the majority of cases does respond to daily oral cyclophosphamide and corticosteroids [1], the standard induction therapy fai...
Article
A markedly increased expression of endothelin (ET)-1 has been observed in renal allografts with chronic rejection, one of the most common causes of kidney graft loss. In this study we investigated the effect of treatment with a combined ET-A/B-receptor antagonist on the course of chronic renal allograft rejection. Experiments were performed in the...
Article
The expression of CD14, CD18, and major histocompatibility complex II on unprimed monocytes from healthy donors after incubation with IgG from patients with antineutrophil cytoplasmic autoantibody (ANCA)-positive active Wegener's granulomatosis (n = 6) and microscopic polyangiitis (n = 6) in comparison with IgG from healthy controls (n = 6) was stu...
Article
Delayed renal function after transplantation is a strong predictor of long-term graft survival. As an increased expression of endothelin (ET) has been demonstrated during ischemia/reperfusion injury, we hypothesized that ET-A receptor blockade could improve the recovery of acute renal failure in a rat model of isogeneic kidney transplantation. Kidn...
Article
Data on a systematic correlation of specific pathomorphologic lesions in renal allograft biopsy specimens with clinical outcome parameters are crucial to determine the relevance of kidney biopsy findings after transplantation for graft prognosis. Specific histologic lesions of the revised Banff '97 classification were correlated with clinical follo...
Article
It has been postulated, based upon epidemiological data, that genetic differences in the enzymes involved in the sulphation of glycosaminoglycan (GAG) side-chains of heparan sulphate (HS) proteoglycans are of crucial importance in the pathogenesis of diabetic nephropathy. An alteration in GAG metabolism is also believed to be responsible for the we...
Article
In kidney biopsies of patients with anti-neutrophil cytoplasmic antibody (ANCA)-associated systemic vasculitis, a variety of histopathological lesions occur, and their relationship to renal outcome is virtually unknown. This multicenter European study reports a clinicopathological analysis of biopsies from 157 patients with systemic vasculitis. The...
Article
Successful maintenance therapy with mycophenolate mofetil (MMF) 2 g/d and low-dose oral corticosteroids (OCS) over a period of 15 mo was given to patients with Wegener's granulomatosis (WG) (n = 9) and microscopic polyangiitis (MPA) (n = 2). All patients had severe generalized disease with pauci-immune necrotizing glomerulonephritis and received st...
Article
Chronic rejection is the most common cause of graft loss in renal transplantation. The pathomechanisms underlying chronic rejection are poorly understood, and no treatment has yet successfully been established. We hypothesized that, in analogy to models of reduced renal mass, the administration of a selective endothelin (ET) A receptor antagonist c...
Article
Two familial clusters of systemic vasculitis are described. In one family, microscopic polyangiitis and rapidly progressive glomerulonephritis occurred in HLA-identical siblings; in the second family, 3 second- and fourth-degree related members were affected by Wegener's granulomatosis. Published clusters of systemic vasculitides and Goodpasture's...
Article
Epidemiological data implicate that renal transplants from living unrelated donors result in superior survival rates as compared with cadaveric grafts, despite a higher degree of human lymphocyte antigen (HLA) mismatching. We undertook a center-based case control study to identify donor-specific determinants affecting early outcome in cadaveric tra...
Article
In diabetic nephropathy, heparan sulfate glycosaminoglycan side chains are reduced in glomerular basement membranes proportionally to the degree of proteinuria. Recently, it was demonstrated that additional therapy with danaparoid sodium, a mixture of sulfated glycosaminoglycans with mainly heparan sulfate, lowered proteinuria in type 1 diabetes pa...
Article
Previously, it has been demonstrated that heparin inhibits major histocompatibility complex (MHC) class II and intercellular adhesion molecule-1 (ICAM-1) expression on interferon-gamma (IFN-gamma)-stimulated human umbilical vein endothelial cells (HUVECs). Inasmuch as proximal tubular epithelial cells (PTECs) are prime targets in acute renal allogr...
Article
Full-text available
Graft-infiltrating T-cell (GIC) lines cultured from biopsies obtained during acute renal allograft rejection exhibit donor-specific cytotoxicity toward proximal tubular epithelial cell (PTEC) lines cultured from corresponding biopsies. This system allows for study of the relative contributions of perforin/granzyme B (GrB)- and Fas ligand (FasL)-bas...
Article
The endothelin (ET) system may play an important role in the pathogenesis of acute renal failure (ARF). We hypothesize that the course of ARF in an ischemia-reperfusion model will be markedly attenuated by the orally active ET(A)-receptor antagonist LU 135252 (LU) because of an improvement of renal perfusion. ARF was induced in rats by clamping bot...
Article
In this study, we investigated the influence of a short-term blockade of the renal endothelin A system on the autoregulation of total renal blood flow, cortical renal blood flow, and pressure-dependent plasma renin activity in spontaneously hypertensive rats (SHRs) and normotensive controls [Wistar-Kyoto (WKY) rats]. In anesthetized rats, renal blo...
Article
After the introduction of cyclosporin as an immunosuppressive drug for organ transplantation at the beginning of the 1980s, concern arose about adverse effects of this new drug. Nephrotoxicity, fear of progressive loss of renal function with long term use of cyclosporin, a higher incidence of lymphomas in the first studies with cyclosporin and the...
Article
Anti-neutrophil cytoplasmic antibodies (ANCA) are widely used as diagnostic markers for Wegener's granulomatosis (WG), microscopic polyangiitis (MPA), Churg-Strauss syndrome (CSS) and idiopathic rapidly progressive glomerulonephritis (iRPGN). The objective of this study was to evaluate the diagnostic value of ANCA measurement by the indirect immuno...
Article
Aspects of pathogenesis of primary systemic vasculitis are highlighted in this review. The cause of these entities is still obscure, although new information on the possible role of infections has emerged. Success of antimicrobial treatment to ameliorate systemic vasculitis, for which proof was recently provided, adds to the new information. Apart...
Article
In diabetes mellitus, both retinopathy and nephropathy represent specific microvascular disease with increased capillary permeability resulting in hard exudates, foveal oedema, and albuminuria. The decrease of heparan-sulphate content of the glomerular-basement membrane is quantitatively related to the rate of proteinuria in nephropathy associated...
Article
Recently it has been recognized that apoptosis of target cells may occur during liver and kidney allograft rejection and is probably induced by infiltrating cells. Pancreas rejection is also characterized by a cellular infiltrate, however, the occurrence of apoptosis has not been investigated. We assessed whether pancreas rejection was associated w...
Article
We investigated the effects of bradykinin (BK) and icatibant (HOE 140), a highly selective bradykinin-B2-receptor antagonist, on mean arterial blood pressure (MAP), heart rate (HR), renal blood flow (RBF), and renal vascular resistance (RVR) in conscious Wistar-Kyoto (WKY) rats and spontaneously hypertensive rats (SHRs). Experiments were performed...
Article
The alloresponse after renal transplantation was studied using alloreactive T cells generated in vivo (from renal biopsies) and in vitro (from mixed kidney lymphocyte cultures). Tissue specificity of graft-infiltrating T cells (GIC) was investigated using donor-derived proximal tubular epithelial cells (PTEC) and splenocytes as targets in cytotoxic...

Citations

... Daily IP injections of a small amount of heparin in the STZ diabetic rat prevented these pathological responses even though the animals sustained hyperglycemic levels of glucose throughout the experiments [13,14]. This led to clinical trials with heparin for treatment of diabetic patients [15]. However, the molecular and cellular mechanism(s) underlying the roles of heparin are still unclear. ...
... [4][5][6] Subsequently, cold storage (CS) and ischemiareperfusion injury (IRI) further exacerbate the heightened immunogenicity of the allograft. 7 Sitting at the interface between the donor allograft and the recipient immune system are donor endothelial cells (ECs), which play a central role in an allograft's immunogenicity as semi-professional antigen-presenting cells. 8 Early injuries induced by BD, CS, and IRI activate and prime these cells to be immunogenic. ...
... Increased levels of T-cell activation markers such as soluble interleukin-2 receptor and soluble CD30 receptor were described in Wegener's granulomatosis and Churg-Strauss syndrome and they correlated with clinical disease activity. In patients with Wegener's granulomatosis, relapse was often associated with or preceded by raised levels of these markers [56]. ...
... It has been demonstrated in two independent clinical studies that catecholamines are capable of delivering protective effects on kidney transplants: Donor employment of catecholamines resulted in both less acute rejection episodes and a profound improvement of long-term graft survival (12,13). Although the molecular mechanisms remain to be elucidated in detail it is clear that the hemodynamic properties of the adrenergic substances cannot entirely explain these salutary effects (14). In particular, dopamine has been shown to stimulate the production of the heat-shock protein heme oxygenase 1 (HO-1) in endothelial and proximal tubular epithelial cells in a dose-dependent manner (15). ...
... Interestingly, the increase in RSNA during intravenous infusion of bradykinin was suppressed in CIH-exposed rats despite a similar decrease in MAP and equivalent plasma levels of bradykinin in CIH-exposed and sham rats. This indicates no alteration in the vascular reactivity to kinin-kallilkrein system, as was suggested for SHR [41]. Therefore, the attenuated RSNA response to systemic bradykinin administration is most likely related to impaired baroreflex control of RSNA in response to intravenous bradykinin-mediated hypotension in CIH-exposed rats, consistent with previous studies from our research group [46,57]. ...
... Morphologically, the diabetic rats developed glomerular sclerosis with increased PAS-positive extracellular matrix synthesis and increased mesangial matrix area in the glomeruli, however, zerumbone was able to ameliorate the morphological deterioration. Furthermore, fibronectin, a major extracellular matrix protein, was induced in diabetic rats but normalized by zerumbone [24]. Our results also show that, along with the decreases in MCP-1 and ICAM-1 expression, zerumbone treatment significantly decreases TGF-β1 expression. ...
... Interestingly, patients with lupus nephritis (LN) and positive ANCAs have more serologically active SLE and more necrotic areas on renal biopsy than ANCA-negative patients [63]. PR3-ANCA-positive samples have 99% specificity for GPA, and MPO-ANCA-positive samples have an 80% specificity for MPA [64]. The role of ANCAs as a diagnostic biomarker is indisputable, yet their predictive value for disease relapse and treatment response remains under investigation. ...
... Seven different algorithms, including support vector regression (SVR) [17], K-nearest neighbors regression (KNR) [18], linear regression (LR) [19], decision tree (DT) [20], random forest (RF) [21], gradient boosting decision tree (GBDT) [22] and artificial neural network (ANN) [23], were used as base learners for fusion algorithm to predict influent indexes for WWTP. These algorithms were chosen based on their successful application in regression prediction tasks. ...
... This hypothesis is reinforced by the evidence that altered carnosinase activity in human serum is associated with mutations in the N-terminal signal peptide due to polymorphisms of the CNDP1 gene [24][25][26][27][28][29][30]. Some of the mutations are associated with differential glycation patterns that reduce secretion and alter serum hydrolytic activity [31]. Therefore, the lack of a signal peptide in the primary sequence of rodent enzymes is likely the reason why no carnosinase activity is detectable in the serum of such species. ...
... It has been shown that dopamine slows down the vicious circle of intracellular calcium accumulation and ATP loss due to its reducing properties and can thus delay cold ischaemia damage. The prerequisite is that dopamine has been accumulated in sufficient concentration in the intracellular space prior to cold preservation [25]. ...