Abstract:
BACKGROUND:The biological properties of oxidized and non-oxidized PTH are substantially different. Oxidized PTH (oxPTH) loses its PTH receptor-stimulating properties, whereas non-oxidized PTH (n-oxPTH) is a full agonist of the receptor. This was described in more than 20 well published studies in the 1970(s) and 80(s). However, PTH oxidation has been ignored during the development of PTH assays for clinical use so far. Even the nowadays used third generation assay systems do not consider oxidation of PTH We recently developed an assay to differentiate between oxPTH and n-oxPTH. In the current study we established normal values for this assay system. Furthermore, we compare the ratio of oxPTH to n-oxPTH in different population with chronic renal failure: 620 children with renal failure stage 2-4 of the 4C study, 342 adult patients on dialysis, and 602 kidney transplant recipients. In addition, we performed modeling of the interaction of either oxPTH or n-oxPTH with the PTH receptor using biophysical structure approaches. RESULTS:The children had the highest mean as well as maximum n-oxPTH concentrations as compared to adult patients (both patients on dialysis as well as kidney transplant recipients). The relationship between oxPTH and n-oxPTH of individual patients varied substantially in all three populations with renal impairment. The analysis of n-oxPTH in 89 healthy control subjects revealed that n-oxPTH concentrations in patient with renal failure were higher as compared to healthy adult controls (2.25-fold in children with renal failure, 1.53-fold in adult patients on dialysis, and 1.56-fold in kidney transplant recipients, respectively). Computer assisted biophysical structure modeling demonstrated, however, minor sterical- and/or electrostatic changes in oxPTH and n-oxPTH. This indicated that PTH oxidation may induce refolding of PTH and hence alters PTH-PTH receptor interaction via oxidation induced three-dimensional structure alteration of PTH. CONCLUSION:A huge proportion of circulating PTH measured by current state-of-the-art assay systems is oxidized and thus not biologically active. The relationship between oxPTH and n-oxPTH of individual patients varied substantially. Non-oxidized PTH concentrations are 1.5 - 2.25 fold higher in patients with renal failure as compared to health controls. Measurements of n-oxPTH may reflect the hormone status more precise. The iPTH measures describes most likely oxidative stress in patients with renal failure rather than the PTH hormone status. This, however, needs to be demonstrated in further clinical studies. © 2013 S. Karger AG, Basel.
journal_name
Kidney Blood Press Resjournal_title
Kidney & blood pressure researchauthors
Hocher B,Oberthür D,Slowinski T,Querfeld U,Schaefer F,Doyon A,Tepel M,Roth HJ,Grön HJ,Reichetzeder C,Betzel C,Armbruster FPdoi
10.1159/000350149subject
Has Abstractpub_date
2013-01-01 00:00:00pages
240-51issue
4-5eissn
1420-4096issn
1423-0143pii
000350149journal_volume
37pub_type
杂志文章abstract:BACKGROUND/AIMS:The role of endothelin (ET) in cardiovascular remodeling was investigated by treating uninephrectomized spontaneously hypertensive rats of the stroke-prone strain (UNX-SHRsp) on normal- or high (3%)-salt diet with the selective ET(A) receptor blocker LU 135252. METHODS:SHRsp on normal or high salt were...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000108626
更新日期:2007-01-01 00:00:00
abstract::Obesity increases the risk for chronic kidney disease (CKD). By analyzing data on individuals who underwent general health screening in two consecutive years, we investigated whether changes in body mass index (BMI) or waist circumference (WC) were associated with the appearance or disappearance of the CKD components;...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000215739
更新日期:2009-01-01 00:00:00
abstract:BACKGROUND/AIMS:Excessive phosphate concentrations trigger vascular calcification, an active process promoted by osteoinduction of vascular smooth muscle cells (VSMCs) with increased expression and activity of transcription factor RUNX2 (Core-binding factor α1, CBFA1), alkaline phosphatase (ALPL), TGFß1, transcription ...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000368524
更新日期:2015-01-01 00:00:00
abstract::Currently, the pathogenesis of nondipper hypertension remains largely unclear in patients without any renal or endocrine pathology. It is well known that overt hypothyroidism is strongly associated with diastolic hypertension. However, no study has addressed the pathogenic role of TSH, free T3 (FT3), and free T4 (FT4)...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000110082
更新日期:2007-01-01 00:00:00
abstract:BACKGROUND/AIMS:Additional validation study was warranted to confirm the clinical significance of C score, which was recently added to the Oxford classification for immunoglobulin A nephropathy (IgAN). METHODS:We performed a multicenter retrospective cohort study in four hospitals in Korea. Patients who had biopsied g...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章,多中心研究
doi:10.1159/000497808
更新日期:2019-01-01 00:00:00
abstract::The effects on glomerular hemodynamics of angiotensin-converting enzyme (ACE) inhibition with captopril and of angiotensin II receptor blockade with EXP 3174, an active metabolite of losartan, either alone or in combination, were compared in anesthetized dogs. Administration of EXP 3174 intrarenally led to an increase...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000174256
更新日期:1997-01-01 00:00:00
abstract:BACKGROUND:There is limited evidence on the etiology and outcomes of renal infarction. A provoking factor is identified only in one- to two-thirds of patients. METHODS:This is a retrospective observational study. The clinical characteristics and outcomes of patients with acute renal infarction were studied; the sample...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000503425
更新日期:2019-01-01 00:00:00
abstract:BACKGROUND:Mesenchymal stem cells (MSC) improve renal function and renovascular hypertension in the 2-kidney 1-clip model (2K-1C). While MSC play an immunomodulatory role, induce neoangiogenesis, and reduce fibrosis, they do not correct sodium loss by the contra-lateral kidney. OBJECTIVES:We investigated the tubular f...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000503346
更新日期:2019-01-01 00:00:00
abstract:AIMS AND METHODS:Our aim was to evaluate the antihypertensive efficacy and tolerability of angiotensin II type 1 (AT1) receptor antagonists. Valsartan or candesartan cilexetil was administered to 11 dialysis patients with elevated blood pressure. The patients (6 male, 5 female; mean age +/- SD 61+/-11 years) were on re...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000054209
更新日期:2001-01-01 00:00:00
abstract:BACKGROUND/AIMS:Calcium sensing receptor (CaSR) is expressed, among others also in testis. Cinacalcet binds to the CaSR, increases sensitivity of CaSR to serum calcium and is used in the treatment of secondary hyperparathyroidism (sHPT) in chronic hemodialysis patients (HDP). In most of male HDP, serum testosterone con...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000368541
更新日期:2016-01-01 00:00:00
abstract::NGAL (neutrophil gelatinase-associated lipocalin) is an acute phase protein, participating in antibacterial immunity. NGAL forms a complex with metalloproteinase 9 (MMP-9), thereby increasing its activity and preventing its degradation. NGAL is freely filtered through the glomerular membrane and reabsorbed by endocyto...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章,评审
doi:10.1159/000368474
更新日期:2014-01-01 00:00:00
abstract:BACKGROUND/AIMS:The main purpose of the present study was to determine the effect of peritoneal charge barrier dysfunction on hypoalbuminemia during CAPD. METHODS:We measured the association of dialysis dose, peritoneal equilibration test (PET) results (ratio of dialysate and plasma creatinine), and peritoneal charge ...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000350150
更新日期:2013-01-01 00:00:00
abstract:BACKGROUND/AIMS:Lung dysfunction associates with increased mortality but the impact of chronic kidney disease (CKD) is less clear. We evaluated lung function and its association with mortality among individuals with normal to severely reduced glomerular filtration rate (GFR). METHODS:404 individuals representing GFR c...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000488699
更新日期:2018-01-01 00:00:00
abstract:BACKGROUND/AIMS:IgA nephropathy is associated with aberrant O-glycosylation of IgA1, which is recognized by autoantibodies leading to the formation of circulating immune complexes. Some of them, after deposition into kidney mesangium, trigger glomerular injury. In patients with active disease nonresponding to angiotens...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000487903
更新日期:2018-01-01 00:00:00
abstract:BACKGROUND:1,25-Dihydroxyvitamin D(3) is mainly synthesized by renal proximal tubular cells. More recently, it has been shown to affect cell growth and TGF-beta(1) synthesis in glomerular and tubular renal cells in vitro, and to prevent glomerulosclerosis in vivo in subtotally nephrectomized rats. The mechanisms involv...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000054213
更新日期:2001-01-01 00:00:00
abstract:BACKGROUND AND OBJECTIVE:Magnoline is an active ingredient of magnolia fargesii with anti-inflammatory and anti-platelet effects. The objective is to explore the renoprotection of magnoline in diabetic rats and its effects on P-selectin. METHODS:Thirty-six rats were randomized into 4 groups-normal control group (C), d...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000350146
更新日期:2013-01-01 00:00:00
abstract:BACKGROUND:Neutrophil gelatinase-associated lipocalin (NGAL), a widely accepted diagnostic marker of acute renal injury (AKI) may be involved in the development of atherosclerosis. PURPOSE:To assess the prognostic significance of serum and urinary NGAL and serum cystatin C in patients with stable angina undergoing per...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000350155
更新日期:2013-01-01 00:00:00
abstract:AIMS AND METHODS:By analyzing data from 2,861 individuals who underwent general health screening 2 years running, we have investigated the impact of changes in waist circumference (WC) and body mass index (BMI) over a 1-year period on systolic blood pressure (BPs). We termed WC, BMI, and BPs at the first visit as WC1, ...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000264233
更新日期:2009-01-01 00:00:00
abstract:BACKGROUND/AIMS:We previously showed that urine and serum Angiopoietin-2 (Ang-2) levels increased significantly with the degree of albuminuria in diabetes patients, but the reasons remain unclear. Consequently we aimed to determine whether there was an association between Ang-2, inflammatory cytokines (TNF-α and IL-18)...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000368510
更新日期:2015-01-01 00:00:00
abstract:BACKGROUND/AIMS:The kinases SPAK (SPS1-related proline/alanine-rich kinase) and OSR1 (oxidative stress-responsive kinase 1) participate in the regulation of the NaCl cotransporter NCC and the Na+, K+, 2Cl- cotransporter NKCC2. The kinases are regulated by WNK (with-no-K[Lys]) kinases. Mutations of genes encoding WNK ki...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000355812
更新日期:2014-01-01 00:00:00
abstract:BACKGROUND:The oxidative stress-responsive kinase 1 (OSR1) participates in the WNK-(with no K) kinase dependent regulation of renal salt excretion and blood pressure. Little is known, however, about the role of OSR1 in the regulation of further renal transport systems. The present study analyzed the effect of OSR1 on N...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000343405
更新日期:2012-01-01 00:00:00
abstract:BACKGROUND/AIMS:Ischemia/reperfusion (I/R) is the most common cause of acute renal injury. I/R-induced oxidative stress is involved in the development of acute renal injury, which can be reversed by supplementation with L-arginine, a precursor of nitric oxide (NO). This study was conducted to evaluate alterations in th...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000480362
更新日期:2017-01-01 00:00:00
abstract:BACKGROUND:Cardiac death is increased in peritoneal dialysis (PD) patients. Pulse wave velocity (PWV) is a measurement of arterial stiffness, and previous reports linked PWV to increased extracellular water (ECW). As cyclers and icodextrin are increasingly used, we wished to determine whether this association between P...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000503424
更新日期:2019-01-01 00:00:00
abstract:BACKGROUND/AIMS:Diabetes mellitus can exacerbate renal ischemia-reperfusion (I/R) injury (RI/RI). The aim of the present study was to evaluate the protective effect of GSK-3β inhibition (TDZD-8) on I/R-induced renal injury through the Nrf2/HO-1 pathway in a streptozocin (STZ)-induced diabetic rat model. METHODS:STZ-in...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000477947
更新日期:2017-01-01 00:00:00
abstract:INTRODUCTION:Renal dysfunction is a frequent complication in patients suffering from β-thalassemia major (β-TM). The aim of this study was to analyze the renal function and urine metabolomic profile of β-TM patients undergoing transfusions and deferasirox (DFX) therapy, in order to better characterize and shed light on...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000507369
更新日期:2020-01-01 00:00:00
abstract:BACKGROUND:Post-transplant diabetes mellitus (PTDM) is a common and serious metabolic complication. Genetic polymorphisms of angiotensin-converting enzyme (ACE) and angiotensinogen (AGT) genes have been reported to be related to diabetes mellitus and insulin sensitivity; however, the role of these genes in the developm...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000343404
更新日期:2013-01-01 00:00:00
abstract:BACKGROUND:Renal involvement in Takayasu's arteritis (TA) effects the disease outcome and endovascular treatment is an effective treatment of choice. We investigated nitric oxide (NO) levels and the effect of endovascular treatment in renovascular hypertensive TA patients. METHODS:In five hypertensive patients with re...
journal_title:Kidney & blood pressure research
pub_type: 临床试验,杂志文章
doi:10.1159/000063514
更新日期:2002-01-01 00:00:00
abstract:BACKGROUND:Metabolic acidosis may be diagnosed as chronic (cMA) if it persists for at least 5 days, although an exact definition has not been provided by any guidelines yet. The most common cause is CKD; numerous less-known diseases can also account for cMA. SUMMARY:In recent years, CKD-associated cMA has been propose...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章,评审
doi:10.1159/000510829
更新日期:2020-01-01 00:00:00
abstract:BACKGROUND/AIMS:Analysis of gene expression in renal tissue is considered to be a diagnostic tool predicting the clinical course of glomerulonephritis. The present study quantified the relative transcript levels of VEGF, CTGF and HIF-1α in renal tissue to establish their relationship with some clinical variables in pat...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000355754
更新日期:2013-01-01 00:00:00
abstract:BACKGROUND/AIMS:The metabolic syndrome (MetS), as assessed using dichotomous criteria, is associated with increased risk of future chronic kidney disease (CKD), though this relationship is unclear among African Americans, who have lower risk for MetS but higher risk for CKD. METHODS:We performed logistic regression us...
journal_title:Kidney & blood pressure research
pub_type: 杂志文章
doi:10.1159/000488829
更新日期:2018-01-01 00:00:00