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Creatinine AND GFR

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https://www.readbyqxmd.com/read/29779023/parathyroid-hormone-fibroblast-growth-factor-23-and-parameters-of-phosphate-reabsorption
#1
Kenneth R Phelps, Darius L Mason
BACKGROUND: The serum phosphorus concentration ([P]s) is the sum of EP/Ccr and TRP/Ccr, where Ccr is creatinine clearance and EP and TRP are rates of excretion and reabsorption of phosphate. In chronic kidney disease (CKD), parathyroid hormone (PTH) and fibroblast growth factor 23 (FGF23) mediate reduction of TRP/Ccr, and [PTH] and [FGF23] are linear functions of EP/Ccr. If controls and patients with CKD are considered together, TRP/Ccr is a hyperbolic function of EP/Ccr. Given these observations, we hypothesized that hyperbolas would describe relationships of phosphate reabsorption to [PTH] and [FGF23]...
May 18, 2018: American Journal of Nephrology
https://www.readbyqxmd.com/read/29778542/urinary-mitochondrial-dna-level-in-non-diabetic-chronic-kidney-diseases
#2
Pascal Zhongping Wei, Bonnie Ching-Ha Kwan, Kai Ming Chow, Phyllis Mei-Shan Cheng, Cathy Choi-Wan Luk, Ka-Bik Lai, Philip Kam- To Li, Cheuk Chun Szeto
BACKGROUND: Mitochondrial dysfunction plays an important role in the pathogenesis and progression of chronic kidney disease (CKD). We study the relation between urinary mitochondrial DNA (mtDNA) levels and renal dysfunction in non-diabetic CKD. METHODS: We recruited 32 CKD patients (20 had hypertensive nephrosclerosis, 12 had IgA nephropathy). Urinary supernatant mtDNA level was measured and compared to baseline clinical and pathological parameters. The patients were followed 57...
May 17, 2018: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/29775444/-influence-of-intensity-localization-and-type-of-deposits-in-renal-biopsy-for-disease-symptoms-and-follow-up-in-children-with-iga-nephropathy
#3
Karolina Cichoń-Kawa, Małgorzata Mizerska-Wasiak, Jadwiga Małdyk, Agnieszka Turczyn, Agnieszka Rybi-Szumińska, Anna Wasilewska, Agnieszka Firszt-Adamczyk, Roman Stankiewicz, Beata Bieniaś, Przemysław Sikora, Katarzyna Gadomska-Prokop, Ryszard Grenda, Małgorzata Pańczyk-Tomaszewska
IgA nephropathy is the most common glomerulonephritis in the world. For diagnosis kidney biopsy is necessary. AIM: The aim of the study was assessment the significance of IgA, C3 and IgG deposits intensity and location in kidney childhood IgA nephropathy (IgAN) for the symptoms of the disease and the follow up. MATERIALS AND METHODS: Study population consisted of 81 children, average 11,45±3,99 years. IgAN was recognized based on renal biopsy, performed 1,2±1,84, median 0,5 years after the onset...
April 23, 2018: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29775443/-b-type-natriuretic-peptide-as-a-marker-of-cardiac-dysfunction-in-children-with-chronic-kidney-disease
#4
Tomasz Drożdż, Przemko Kwinta, Zbigniew Kordon, Krystyna Sztefko, Andrzej Rudziński, Katarzyna Zachwieja, Monika Miklaszewska, Danuta Czarnecka, Dorota Drożdż
Left ventricular hypertrophy is the most common organ damage in children with chronic kidney disease (CKD). AIM: The aim of the study was to assess the usefulness of B-type natriuretic peptide (BNP) as a marker of heart injury in children with CKD. MATERIALS AND METHODS: We included 66 children (41 boys and 25 girls) aged 0.7 to 18.6 (median 11.6) years with CKD stage 1-5. The concentrations of urea, creatinine, cystatin C and BNP in blood serum were assessed, and the estimated glomerular filtration rate (eGFR) was calculated from the Schwartz and Filler formulas...
April 23, 2018: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29775220/cystatin-c-is-a-more-reliable-biomarker-for-determining-egfr-to-support-drug-development-studies
#5
REVIEW
Sumit Kar, Sabina Paglialunga, Rafiqul Islam
Glomerular filtration rate (GFR) is routinely used as a surrogate endpoint for the development of investigational drugs in clinical trials. GFR and staging of chronic kidney disease are typically assessed by measuring the concentration of endogenous serum biomarkers such as albumin and creatinine. However, creatinine is subject to high biological variability, and levels of creatinine do not rise until nearly 50% of kidney function is damaged, leading to inaccurate chronic kidney disease staging and false negatives...
May 18, 2018: Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/29774463/early-cardiovascular-manifestations-in-children-and-adolescents-with-autosomal-dominant-polycystic-kidney-disease-a-single-center-study
#6
Vasiliki Karava, Cherine Benzouid, Julien Hogan, Claire Dossier, André Pierre Denjean, Georges Deschênes
BACKGROUND: This study aims to describe the cardiovascular manifestations in children with autosomal dominant polycystic kidney disease (ADPKD) and detect their relation with kidney disease and type of gene mutation. METHODS: Twenty-one patients (7 to 19 years old) were included. Cardiovascular evaluation involved blood pressure (BP), indexed left ventricular mass (LVMI), pulse wave velocity (PWV), and carotid intima media thickness (cIMT) measurement. Patients were classified according to percentile reference values of these parameters in healthy children...
May 17, 2018: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/29774462/combining-gfr-estimates-from-cystatin-c-and-creatinine-what-is-the-optimal-mix
#7
Emil den Bakker, Reinoud Gemke, Joanna A E van Wijk, Isabelle Hubeek, Birgit Stoffel-Wagner, Arend Bökenkamp
BACKGROUND: Combining estimated glomerular filtration rate (eGFR) equations based on creatinine and cystatin C has been shown to improve the accuracy of GFR estimation. This study aims to optimize this strategy for height-independent GFR estimation in children. METHODS: Retrospective study of 408 inulin clearance tests with simultaneous International Federation of Clinical Chemistry-calibrated measurements of creatinine, cystatin C, and urea in children (mean age 12...
May 17, 2018: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/29773235/factors-associated-with-renal-function-compensation-after-donor-nephrectomy
#8
Carla Burballa, Marta Crespo, Dolores Redondo-Pachón, María José Pérez-Sáez, Carlos Arias-Cabrales, Marisa Mir, Albert Francés, Lluís Fumadó, Lluís Cecchini, Julio Pascual
INTRODUCTION: Kidney transplant donors lose 50% of their renal mass after nephrectomy. The remaining kidney compensates for this loss and it is estimated that 70% of the baseline renal function prior to donation is recovered. Factors associated with post-donation renal compensation are not well understood. METHODS: Retrospective study of 66 consecutive kidney donors (mean age 48.8 years, 74.2% women). We analysed the potential factors associated with the compensatory mechanisms of the remaining kidney by comparing donors according to their renal compensation rate (RCR) (Group A, infra-compensation [<70%]; Group B, normal compensation [>70%])...
May 14, 2018: Nefrología: Publicación Oficial de la Sociedad Española Nefrologia
https://www.readbyqxmd.com/read/29768260/carboplatin-dosing-accuracy-by-estimation-of-glomerular-filtration-versus-creatinuria-in-cancer-patients
#9
Noiver Graciano Vera, Luis Pino Villarreal, Jenny Ureña Vargas
BACKGROUND: The glomerular filtration rate (GFR) is essential for calculating the dose and the monitoring of carboplatin. Although GFR measurement (mGFR) by external markers is ideal, in most cases these are not employed; the most used method is GFR estimation (eGFR) by formulae, hence the need to identify the formula with the best performance. METHODS: Patients admitted between 2011 and 2017 and diagnosed with ovarian, endometrial, lung, esophageal, or testicular cancer were assessed retrospectively...
May 16, 2018: Chemotherapy
https://www.readbyqxmd.com/read/29763902/prognostic-factors-of-renal-involvement-in-systemic-sclerosis
#10
Edoardo Rosato, Antonietta Gigante, Biagio Barbano, Maria Ludovica Gasperini, Rosario Cianci, Maurizio Muscaritoli
BACKGROUND/AIMS: Renal involvement is common in systemic sclerosis (SSc), including asymptomatic reduction of glomerular filtration rate (GFR), increased renal resistance indices, scleroderma renal crisis (SRC) and ANCA-associated vasculitis. The aim was to evaluate type and evolution of renal involvement for a period of five years. METHODS: 121 SSc patients (100 F, 21 M) with mean age of 54.9 ± 13.8, disease duration of 9 ± 6 years, of which 62 had a diffused form and 59 limited form were enrolled...
May 10, 2018: Kidney & Blood Pressure Research
https://www.readbyqxmd.com/read/29762739/ckd-staging-with-cystatin-c-or-creatinine-based-formulas-flipping-the-coin
#11
Sergio Luis-Lima, Beatriz Escamilla-Cabrera, Natalia Negrín-Mena, Sara Estupiñán, Patricia Delgado-Mallén, Domingo Marrero-Miranda, Ana González-Rinne, Rosa Miquel-Rodríguez, María Ángeles Cobo-Caso, Manuel Hernández-Guerra, Juana Oramas, Norberto Batista, Ana Aldea-Perona, Pablo Jorge-Pérez, Carlos González-Alayón, Miguel Moreno-Sanfiel, Juan Antonio González-Rodríguez, Laura Henríquez, Raquel Alonso-Pescoso, Laura Díaz-Martín, Federico González-Rinne, Bernardo Alio Lavín-Gómez, Judith Galindo-Hernández, Macarena Sánchez-Gallego, Alejandra González-Delgado, Alejandro Jiménez-Sosa, Armando Torres, Esteban Porrini
Background: Chronic kidney disease (CKD) affects 10-13% of the population worldwide. CKD classification stratifies patients in five stages of risk for progressive renal disease based on estimated glomerular filtration rate (eGFR) by formulas and albuminuria. However, the reliability of formulas to reflect real renal function is a matter of debate. The effect of the error of formulas in the CKD classification is unclear, particularly for cystatin C-based equations. Methods: We evaluated the reliability of a large number of cystatin C and/or creatinine-based formulas in the definition of the stages of CKD in 882 subjects with different clinical situations over a wide range of glomerular filtration rates (GFRs) (4...
May 11, 2018: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29761689/percutaneous-nephrolithotomy-in-solitary-kidneys-effective-safe-and-improves-renal-functions
#12
Volkan Caglayan, Sedat Oner, Efe Onen, Sinan Avci, Murat Aydos, Metin Kilic, Murat Demirbas
BACKGROUND: To evaluate success and complication rates of endourological stone treatments and to evaluate effects of percutaneous nephrolithotomy (PCNL) on renal functions, in patients with solitary kidneys. METHODS: In our center, 3150 patients underwent PCNL between 2003 and 2017 and 142 patients underwent retrograd intrarenal surgery (RIRS) between 2013 and 2017. We retrospectively analysed the data of 82 patients with solitary kidney who underwent PCNL and of 8 patients with solitary kidney who underwent RIRS...
May 14, 2018: Minerva Urologica e Nefrologica, the Italian Journal of Urology and Nephrology
https://www.readbyqxmd.com/read/29749989/first-report-on-the-percentiles-of-the-glomerular-filtration-rate-in-iranian-children-using-the-2009-schwartz-equations
#13
Peyman Roomizadeh, Alaleh Gheissari, Roya Kelishadi, Farhad Mahmoudi, Amin Abedini
The glomerular filtration rate (GFR) is widely considered the best overall index of renal function. The Schwartz equations are designed for measuring the GFR in children between 1 and 16 years of age. In the present study, we investigated the percentiles of the GFR in a general population of Iranian children with no known renal disease via the 2009 Schwartz equations (updated and combined equations). Between 2010 and 2011, we selected 687 children aged 7-16 years from the Iranian province of Isfahan. Blood samples were analyzed for blood urea nitrogen, creatinine, and cystatin C...
March 2018: Iranian Journal of Medical Sciences
https://www.readbyqxmd.com/read/29748326/a-novel-method-for-rapid-bedside-measurement-of-gfr
#14
Dana V Rizk, Daniel Meier, Ruben M Sandoval, Teresa Chacana, Erinn S Reilly, Jesse C Seegmiller, Emmanuel DeNoia, James S Strickland, Joseph Muldoon, Bruce A Molitoris
Background Direct quantitative measurement of GFR (mGFR) remains a specialized task primarily performed in research settings. Multiple formulas for estimating GFR have been developed that use the readily available endogenous biomarkers creatinine and/or cystatin C. However, eGFR formulas have limitations, and an accurate mGFR is necessary in some clinical situations and for certain patient populations. We conducted a prospective, open-label study to evaluate a novel rapid technique for determining plasma volume and mGFR...
May 10, 2018: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/29740877/eversion-endarterectomy-of-the-deceased-donor-renal-artery-to-prevent-kidney-discard
#15
Muhammad A Khan, Hany El-Hennawy, Korie C Jones, David Harriman, Alan C Farney, Jeffrey Rogers, Giuseppe Orlando, Robert J Stratta
INTRODUCTION: Deceased donor (DD) kidneys exhibiting severe atherosclerosis involving the renal artery (RA) may represent a contraindication to kidney transplantation (KT). METHODS: Eversion endarterectomy (EE) was performed as a salvage procedure to permit KT. RESULTS: We identified 17 cases (1.2% of all DD KTs during the study period) involving EE of the DD RA. Thirteen (76.5%) kidneys were imported and mean Kidney Donor Profile Index (KDPI) was 81%...
May 8, 2018: Clinical Transplantation
https://www.readbyqxmd.com/read/29738036/first-stages-chronic-kidney-disease-have-mild-effects-on-cognitive-performance-results-of-a-15-105-brazilian-adult-baseline-cohort
#16
Valéria Maria de Azeredo Passos, Roberto Marini Ladeira, Cláudia Caciquinho Vieira de Souza, Itamar de Souza Santos, Sandhi Maria Barreto
INTRODUCTION: The aging of the population may lead to an increased prevalence of dementia and chronic kidney disease (CKD) and their overlap. OBJECTIVE: We investigated the association between CKD and cognitive performance among Brazilian adults (35-74 years). METHODS: Baseline data analysis of the Longitudinal Study of Adults (ELSA-Brasil), a multicenter cohort comprising 15,105 civil servants, was performed. Kidney function was defined by the CKD-Epi-estimated GRF and albumin creatinin ratio (ACR)...
April 26, 2018: Jornal Brasileiro de Nefrologia: ʹorgão Oficial de Sociedades Brasileira e Latino-Americana de Nefrologia
https://www.readbyqxmd.com/read/29736630/variations-in-clinical-management-of-non-vitamin-k-antagonist-oral-anticoagulants-in-patients-with-atrial-fibrillation-according-to-different-equations-for-estimating-renal-function-post-hoc-analysis-of-a-prospective-cohort
#17
Vincenzo Livio Malavasi, Daniele Pettorelli, Elisa Fantecchi, Cristina Zoccali, Giuliana Laronga, Tommaso Trenti, Gregory Yoke Hong Lip, Giuseppe Boriani
Prescription of non-vitamin K antagonist oral anticoagulants (NOACs) requires an assessment of renal function (RF) and the Cockcroft-Gault (CG) equation is traditionally recommended. The objective of the study was to evaluate the potential changes in NOACs management using different equations for estimating RF. In a post hoc analysis of a prospective cohort of patients with atrial fibrillation, we considered different equations: (1) CG for creatinine clearance (CrCl), (2) modification of diet in renal disease (MDRD), (3) CKD-EPI, (4) Berlin Initiative Study 1 (BIS-1) and (5) full age spectrum (FAS), for glomerular filtration rate (GFR)...
May 7, 2018: Internal and Emergency Medicine
https://www.readbyqxmd.com/read/29736597/differential-mobility-spectrometry-mass-spectrometry-dms-ms-in-radiation-biodosimetry-rapid-and-high-throughput-quantitation-of-multiple-radiation-biomarkers-in-nonhuman-primate-urine
#18
Zhidan Chen, Stephen L Coy, Evan L Pannkuk, Evagelia C Laiakis, Albert J Fornace, Paul Vouros
High-throughput methods to assess radiation exposure are a priority due to concerns that include nuclear power accidents, the spread of nuclear weapon capability, and the risk of terrorist attacks. Metabolomics, the assessment of small molecules in an easily accessible sample, is the most recent method to be applied for the identification of biomarkers of the biological radiation response with a useful dose-response profile. Profiling for biomarker identification is frequently done using an LC-MS platform which has limited throughput due to the time-consuming nature of chromatography...
May 7, 2018: Journal of the American Society for Mass Spectrometry
https://www.readbyqxmd.com/read/29735307/combination-of-pediatric-and-adult-formulas-yield-valid-glomerular-filtration-rate-estimates-in-young-adults-with-a-history-of-pediatric-chronic-kidney-disease
#19
Derek K Ng, George J Schwartz, Michael F Schneider, Susan L Furth, Bradley A Warady
As patients with chronic kidney disease (CKD) transition from pediatric nephrology care to adult care, their kidney function is clinically assessed by estimated glomerular filtration rate (eGFR) using both pediatric and adult equations, which may not be congruent. Here we evaluated commonly used eGFR equations and directly measured iohexol GFR (iGFR) among participants between ages 18 and 26 with a diagnosis of pediatric CKD in the Chronic Kidney Disease in Children (CKiD) cohort. The bedside serum creatinine (SCr)-only equation (CKiDSCr ), the SCr-only CKD-EPI (CKD-EPISCr ), the cystatin C (Cys)-only CKD-EPI (CKD-EPICys ) and the combined SCr and Cys CKD-EPI (CKD-EPISCr-Cys ) were compared with a) 279 measured iGFRs obtained from 187 participants and b) 548 eGFRs from the SCr and Cys-based CKiD equation (CKiDSCr-Cys ) obtained from 219 participants...
May 5, 2018: Kidney International
https://www.readbyqxmd.com/read/29733108/reliability-of-serum-creatinine-based-formulae-estimating-renal-function-in-non-critically-ill-surgery-patients-focus-on-augmented-renal-clearance
#20
Peter Declercq, Matthias Gijsen, Björn Meijers, Marie Schetz, Stefaan Nijs, André D'Hoore, Joost Wauters, Isabel Spriet
WHAT IS KNOWN AND OBJECTIVES: Formulae estimating glomerular filtration rate (GFR) are frequently used to guide drug dosing. The objectives of this prospective single-center study were to evaluate agreement between these equations and measured creatinine clearance (CrCl) in non-critically ill surgery patients with normal kidney function and augmented renal clearance (ARC, CrCl ≥ 130 mL/min/1.73 m²), to determine predictors for disagreement, define a GFR estimator cut-off value identifying ARC and determine the ARC prevalence and duration in non-critically ill surgical patients...
May 7, 2018: Journal of Clinical Pharmacy and Therapeutics
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