References of "DELANAYE, Pierre"
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See detailThe Third/Second Generation PTH Assay Ratio as a Marker for Parathyroid Carcinoma: Evaluation Using an Automated Platform
CAVALIER, Etienne ULg; BETEA, Daniela ULg; SCHLECK, Marie-Louise ULg et al

in Journal of Clinical Endocrinology and Metabolism (2014), 99(3), 453-7

Background: Parathyroid carcinoma (PCa) is rare and often difficult to differentiate initially from benign disease. Because PCa oversecretes amino PTH that is detected by third-generation but not by ... [more ▼]

Background: Parathyroid carcinoma (PCa) is rare and often difficult to differentiate initially from benign disease. Because PCa oversecretes amino PTH that is detected by third-generation but not by second-generation PTH assays, the normal generation PTH ( 1) is inverted in PCa (ie, 1). Objective: The objective of the investigation was to study the utility and advantages of automated generation PTH ratio measurements using the Liaison XL platform over existing manual techniques. Setting: The study was conducted at a tertiary-referral academic center. Design: This was a retrospective laboratory study. Subjects: Eleven patients with advanced PCa (mean age 56.0 y). The controls were patients with 1°-hyperparathyroidism (n 144;meanage 53.8 y), renal transplantation (n 41;meanage 50.6 y), hemodialysis (n 80; mean age 65.2 y), and healthy elderly subjects (n 40; mean age 72.6 y). Results: The median (interquartile range) generation PTH ratio was 1.16 (1.10 –1.38) in the PCa group, which was significantly higher than the control groups: 0.74 (hemodialysis, 0.71–0.75), 0.77 (renal transplant, 0.73–0.79), 0.80 (healthy elderly, 0.74–0.83), and 0.76 (1°-hyperparathyroidism, 0.74–0.78). An inverted -generation PTH ratio ( 1) was seen in 9 of 11 PCa patients (81.8%) and in 7 of 305 controls (2.3%), 3 of 80 hemodialysis (3.8%), and 4 of 144 1°-hyperparathyroidism patients (2.8%). Of four PCa patients who had a normal PTH ratio with the manual method, two had an inverted -generation PTH ratio with the automated method. Conclusions: Study of the -generation PTH ratio in large patient populations should be feasible using a mainstream automated platform like the Liaison XL. The current study confirms the utility of the inverted -generation PTH ratio as a marker of PCa (sensitivity: 81.8%; specificity: 97.3%). [less ▲]

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See detailDetection of decreased glomerular filtration rate in intensive care units: serum cystatin C versus serum creatinine
DELANAYE, Pierre ULg; CAVALIER, Etienne ULg; Morel, Jérôme et al

in BMC Nephrology (2014), 15(9), 1471-2369

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See detailEnzymatic creatinine assays allowestimation of glomerular filtration rate in stages 1 and 2 chronic kidney disease using CKD-EPI equation
Kuster, Nils; Cristol, Jean-Paul; CAVALIER, Etienne ULg et al

in Clinica Chimica Acta (2014), 428

The National Kidney Disease Education Program group demonstrated that MDRD equation is sensitive to creatinine measurement error, particularly at higher glomerular filtration rates. Thus, MDRD-based eGFR ... [more ▼]

The National Kidney Disease Education Program group demonstrated that MDRD equation is sensitive to creatinine measurement error, particularly at higher glomerular filtration rates. Thus, MDRD-based eGFR above 60 mL/min/1.73 m2 should not be reported numerically. However, little is known about the impact of analytical error on CKD-EPI-based estimates. This study aimed at assessing the impact of analytical characteristics (bias and imprecision) of 12 enzymatic and 4 compensated Jaffe previously characterized creatinine assays on MDRD and CKD-EPI eGFR. In a simulation study, the impact of analytical error was assessed on a hospital population of 24 084 patients. Ability using each assay to correctly classify patients according to chronic kidney disease (CKD) stages was evaluated. For eGFR between 60 and 90 mL/min/1.73 m2, both equations were sensitive to analytical error. Compensated Jaffe assays displayed high bias in this range and led to poorer sensitivity/specificity for classification according to CKD stages than enzymatic assays. As compared to MDRD equation, CKD-EPI equation decreases impact of analytical error in creatinine measurement above 90 mL/min/1.73 m2. Compensated Jaffe creatinine assays lead to important errors in eGFR and should be avoided. Accurate enzymatic assays allow estimation of eGFR until 90 mL/min/1.73 m2 with MDRD and 120 mL/min/1.73 m2 with CKD-EPI equation. [less ▲]

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See detailCreatinine-based GFR estimating equations in kidney transplant recipients
DELANAYE, Pierre ULg

in American Journal of Kidney Diseases (2014), 64(5), 818

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See detailL'Estimation de la filtration glomérulaire en 2014: Intérêts et limites des tests et formules
Hougardy, Jean-Michel; DELANAYE, Pierre ULg; Le Moine, Alain et al

in Revue Médicale de Bruxelles (2014), 35(4), 250-257

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See detailClinical and biological determinants of sclerostin plasma concentration in hemodialysis patients
DELANAYE, Pierre ULg; KRZESINSKI, Jean-Marie ULg; Warling, Xavier et al

in Nephron. Clinical Practice (2014), 128

Background: Sclerostin is a potent inhibitor of bone formation, but the meaning of its serum levels remains undetermined. We evaluated the association between sclerostin levels and clinical or biological ... [more ▼]

Background: Sclerostin is a potent inhibitor of bone formation, but the meaning of its serum levels remains undetermined. We evaluated the association between sclerostin levels and clinical or biological data in hemodialyzed patients (HD), notably parathormone (PTH), biomarkers of bone turnover, vascular calcifications and mortality after 2 years. Methods: 164 HD patients were included in this observational study. The calcification score was assessed with the Kauppila method. Patients were followed for 2 years. Results: Median sclerostin levels were significantly (p < 0.0001) higher in HD versus healthy subjects (n = 94) (1,375 vs. 565 pg/ml, respectively). In univariate analysis a significant association (p < 0.05) was found between sclerostin and age, height, dialysis vintage, albumin, troponin, homocysteine, PTH, C-terminal telopeptide of collagen type I, bone-specific alkaline phosphatase and osteoprotegerin, but not with the calcification score. In a multivariate model, the association remained with age, height, dialysis vintage, troponin, homocysteine, phosphate, PTH, but also with vascular calcifications. Association was positive for all variables, except PTH and vascular calcifications. The baseline sclerostin concentration was not different in survivors and non-survivors. Conclusions: We confirm a higher concentration of sclerostin in HD patients, a positive association with age and a negative association with PTH. A positive association with phosphate, homocysteine and troponin calls for additional research. The clinical interest of sclerostin to assess vascular calcifications in HD is limited and no association was found between sclerostin and mortality. [less ▲]

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See detailEstimation du débit de filtration glomérulaire en 2014
DELANAYE, Pierre ULg; Krzesinski, Jean-Marie ULg

in Revue Médicale de Liège (2014), 69

Chronic kidney disease (CKD) is a frequent affection, most often detected by evaluation of the glomerular filtration rate (GFR). Measuring GFR by a reference method is not possible for every single ... [more ▼]

Chronic kidney disease (CKD) is a frequent affection, most often detected by evaluation of the glomerular filtration rate (GFR). Measuring GFR by a reference method is not possible for every single patient, even if these methods are probably underused. However, serum creatinine has several limitations of which clinicians should be aware. Knowing these limitations, creatinine and creatinine-based équations (including other parameters like age, gender and ethnicity) still represent the most used and easiest way to detect and assess CKD. [less ▲]

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See detailPINP in renal impaired patients: the assay matters
CAVALIER, Etienne ULg; DELANAYE, Pierre ULg

Poster (2013, November 08)

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See detailModification of diet in renal disease versus chronic kidney disease epidemiology collaboration equation to estimate glomerular filtration rate in obese patients
BOUQUEGNEAU, Antoine ULg; Vidal-Petiot, Emanuelle; Vrtovsnik, François et al

in Nephrology Dialysis Transplantation (2013), 28(4), 122-130

Background Obesity is a recognized risk factor for both the development and progression of chronic kidney disease (CKD). Accurate estimation of glomerular filtration rate (GFR) is thus important in these ... [more ▼]

Background Obesity is a recognized risk factor for both the development and progression of chronic kidney disease (CKD). Accurate estimation of glomerular filtration rate (GFR) is thus important in these patients. We tested the performances of two creatinine-based GFR estimates, the Modification of Diet in Renal Disease (MDRD) and the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equations, in an obese population. Methods Patients with body mass index (BMI) > 30 kg/m2 were included. The reference method for measured GFR (mGFR) was 51Cr-EDTA (single-injection method, two blood samples at 120 and 240 min). Both indexed and non-indexed results were considered. Serum creatinine was measured using the IDMS-traceable compensated Jaffe method. Mean bias (eGFR–mGFR), precision (SD around the bias) and accuracy within 30% (percentage of estimations within 30% of mGFR) were calculated for both equations. Results The population included 366 patients (185 women) from two different areas. Mean age was 55 ± 14 years, and mean BMI was 36 ± 7 kg/m2. Mean mGFR was 56 ± 26 mL/min/1.73 m2 (71 ± 35 mL/min without indexation). In the total population, mean bias was +1.9 ± 14.3 and +4.6 ± 14.7 mL/min/1.73 m2 (P < 0.05), and accuracy 30% was 80 and 76% for the MDRD and CKD-EPI equations (P < 0.05), respectively. In patients with mGFR > 60 mL/min/1.73 m2, mean bias was +4.6 ± 18.4 and +9.3 ± 17.2 mL/min/1.73 m2 (P < 0.05), and accuracy 30% was 81 and 79% (NS) for the MDRD and CKD-EPI equations, respectively. Conclusions The CKD-EPI equation did not outperform the MDRD study equation in this population of obese patients [less ▲]

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See detailStaging chronic kidney disease and estimating glomerular filtration rate: an opinion paper about the new international recommendations
DELANAYE, Pierre ULg; CAVALIER, Etienne ULg

in Clinical Chemistry & Laboratory Medicine (2013), 51(10), 1911-1917

Abstract: In January 2013, the international recommendations <br />of the KDIGO (for “ Kidney Disease: Improving <br />Global Outcomes ” ) to define chronic kidney disease <br />(CKD) and classify ... [more ▼]

Abstract: In January 2013, the international recommendations <br />of the KDIGO (for “ Kidney Disease: Improving <br />Global Outcomes ” ) to define chronic kidney disease <br />(CKD) and classify patients in CKD stages have been published. <br />In this opinion article, we will review and discuss <br />the most important guidelines proposed about CKD staging <br />and glomerular filtration rate (GFR) estimating. In <br />particular, we question the choice of fixed knot values <br />at 60 mL/min/1.73 m ² to define CKD. We also question <br />the strategies proposed to measure and use cystatin C <br />results. [less ▲]

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See detailThe applicability of eGFR equations to different populations
DELANAYE, Pierre ULg; Mariat, Christophe

in Nature Reviews Nephrology (2013), 9

The Cockcroft–Gault equation for estimating glomerular filtration rate has been learnt by every generation of medical students over the decades. Since the publication of the Modification of Diet in Renal ... [more ▼]

The Cockcroft–Gault equation for estimating glomerular filtration rate has been learnt by every generation of medical students over the decades. Since the publication of the Modification of Diet in Renal Disease (MDRD) study equation in 1999, however, the supremacy of the Cockcroft–Gault equation has been relentlessly disputed. More recently, the Chronic Kidney Disease Epidemiology (CKD-EPI) consortium has proposed a group of novel equations for estimating glomerular filtration rate (GFR). The MDRD and CKD-EPI equations were developed following a rigorous process, are expressed in a way in which they can be used with standardized biomarkers of GFR (serum creatinine and/or serum cystatin C) and have been evaluated in different populations of patients. Today, the MDRD Study equation and the CKD-EPI equation based on serum creatinine level have supplanted the Cockcroft–Gault equation. In many regards, these equations are superior to the Cockcroft–Gault equation and are now specifically recommended by international guidelines. With their generalized use, however, it has become apparent that those equations are not infallible and that they fail to provide an accurate estimate of GFR in certain situations frequently encountered in clinical practice. After describing the processes that led to the development of the new GFR-estimating equations, this Review discusses the clinical situations in which the applicability of these equations is questioned. [less ▲]

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See detailCholecaciferol in haemodialysis patients: a randomized, double-blind, proof-of-concept and safety study
DELANAYE, Pierre ULg; WEEKERS, Laurent ULg; WARLING, Xavier et al

in Nephrology Dialysis Transplantation (2013), 28(7), 1779-1786

Background. The role of cholecalciferol supplementation in end-stage renal disease (ESRD) patients has been questioned. The objective of this randomized double-blinded study is to assess whether ... [more ▼]

Background. The role of cholecalciferol supplementation in end-stage renal disease (ESRD) patients has been questioned. The objective of this randomized double-blinded study is to assess whether cholecalciferol therapy can increase serum 25-hydroxyvitamin D [25(OH)D] levels in haemodialysed patients and the safety implications of this therapy on certain biological parameters and vascular calcifications score. Methods. Forty-three haemodialysis patients were randomized to receive placebo or cholecalciferol (25 000 IU) therapy every 2 weeks. The biological parameters, serum calcium, phosphorus, 25(OH)D and parathormone (PTH) levels, were monitored monthly for 12 consecutive months. Vascular calcifications were assessed by lateral X-ray radiography. Results. At baseline, the mean serum 25(OH)D levels were low and similar in both groups. Thirty patients (16 treated and 14 placebo) completed the study: 11 patients died (5 placebo and 6 treated), 1 patient dropped out and 1 patient was transplanted (both from the placebo group). After 1 year, the percentage of 25(OH)D deficient patients was significantly lower in the treated group. None of the patients developed hypercalcaemia. The PTH levels tended to increase over the study period under placebo and to decrease in the cholecalciferol group. The median changes in PTH levels from baseline to 1 year were statistically different between the two groups [+80 (−58 to 153) and −115 (−192 to 81) under placebo and cholecalciferol treatment, respectively, P = 0.02].The calcification scores increased equivalently in both groups (+2.3 per year). Conclusions. Cholecalciferol is effective and safe, and does not negatively affect calcium, phosphorus, PTH levels and vascular calcifications. Additional studies are needed to compare the impacts of nutritional and active vitamin D agents on vascular calcification and mortality. [less ▲]

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See detailEVOLVE: entre déception et optimisme
DELANAYE, Pierre ULg; Krzesinski, Jean-Marie ULg; CAVALIER, Etienne ULg

in Néphrologie & Thérapeutique (2013), 9(4), 241-245

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