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Clearance glomerular filtration rate

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https://www.readbyqxmd.com/read/29150412/clinical-benefits-of-using-inulin-clearance-and-cystatin-c-for-determining-glomerular-filtration-rate-in-hiv-1-infected-individuals-treated-with-dolutegravir
#1
Satomi Yukawa, Dai Watanabe, Tomoko Uehira, Takuma Shirasaka
INTRODUCTION: Dolutegravir may inhibit creatinine transporters in renal tubules and elevate serum creatinine levels. We investigated the usefulness of glomerular filtration rate (GFR) measured using inulin clearance (Cin), creatinine clearance (Ccr), and estimated GFR based on both serum creatinine (eGFRcre) and serum cystatin C (eGFRcys). PATIENTS & METHODS: HIV-1-infected Japanese patients with suppressed viremia and whose antiretroviral drug was switched to dolutegravir from other drugs were included (n = 108, Study 1)...
November 14, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/29146282/-measurement-and-estimation-of-glomerular-filtration-rate
#2
Emmanuelle Vidal-Petiot, Martin Flamant
Glomerular filtration rate is the best quantitative marker of renal function. It allows diagnosis and classification of severe chronic kidney disease into five stages. Theoretically, the measurement of glomerular filtration rate is based on the calculation of urinary clearance of exogenous substances such as chromium 51-labeled inulin or ethylenediaminetetraacetic acid ([(51)Cr]-EDTA). In practice, glomerular filtration rate is most often estimated from equations derived from plasma creatinine. This article reviews the range of methods used to measure or approximate glomerular filtration rate and attempts to describe recent developments in this area, including those related to plasma creatinine assay methods, creatinine and cystatin C concentration-derived estimations...
November 13, 2017: Néphrologie & Thérapeutique
https://www.readbyqxmd.com/read/29134449/iohexol-plasma-clearance-in-children-validation-of-multiple-formulas-and-single-point-sampling-times
#3
Camilla Tøndel, Cathrin Lytomt Salvador, Karl Ove Hufthammer, Bjørn Bolann, Damien Brackman, Anna Bjerre, Einar Svarstad, Atle Brun
BACKGROUND: The non-ionic agent iohexol is increasingly used as the marker of choice for glomerular filtration rate (GFR) measurement. Estimates of GFR in children have low accuracy and limiting the number of blood-draws in this patient population is especially relevant. We have performed a study to evaluate different formulas for calculating measured GFR based on plasma iohexol clearance with blood sampling at only one time point (GFR1p) and to determine the optimal sampling time point...
November 13, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/29133918/fast-simultaneous-assessment-of-renal-and-liver-function-using-polymethine-dyes-in-animal-models-of-chronic-and-acute-organ-injury
#4
A T Press, M J Butans, T P Haider, C Weber, S Neugebauer, M Kiehntopf, U S Schubert, M G Clemens, M Bauer, A Kortgen
Simultaneous assessment of excretory liver and kidney function is still an unmet need in experimental stress models as well as in critical care. The aim of the study was to characterize two polymethine-dyes potentially suitable for this purpose in vivo. Plasma disappearance rate and elimination measurements of simultaneously injected fluorescent dyes DY-780 (hepato-biliary elimination) and DY-654(renal elimination) were conducted using catheter techniques and intravital microscopy in animals subjected to different organ injuries, i...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29105594/tolvaptan-in-later-stage-autosomal-dominant-polycystic-kidney-disease
#5
Vicente E Torres, Arlene B Chapman, Olivier Devuyst, Ron T Gansevoort, Ronald D Perrone, Gary Koch, John Ouyang, Robert D McQuade, Jaime D Blais, Frank S Czerwiec, Olga Sergeyeva
BACKGROUND: In a previous trial involving patients with early autosomal dominant polycystic kidney disease (ADPKD; estimated creatinine clearance, ≥60 ml per minute), the vasopressin V2-receptor antagonist tolvaptan slowed the growth in total kidney volume and the decline in the estimated glomerular filtration rate (GFR) but also caused more elevations in aminotransferase and bilirubin levels. The efficacy and safety of tolvaptan in patients with later-stage ADPKD are unknown. METHODS: We conducted a phase 3, randomized withdrawal, multicenter, placebo-controlled, double-blind trial...
November 16, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/29096403/impact-of-lean-mass-and-bone-density-on-glomerular-filtration-rate-estimation-in-people-living-with-hiv-aids
#6
Corinne Isnard Bagnis, Laurence Pieroni, Rachida Inaoui, Philippe Maksud, Stéphanie Lallauret, Marc-Antoine Valantin, Roland Tubiana, Christine Katlama, Gilbert Deray, Marie Courbebaisse, Jérôme Tourret, Sophie Tezenas du Montcel
CONTEXT: Chronic kidney disease is a frequent complication in persons living with HIV/AIDS. Although previous studies have suggested that the CKD-EPI formula is appropriate to estimate glomerular filtration rate (GFR) in HIV-positive adults with normal kidney function, the optimal way to estimate GFR in those with Stage 3 chronic kidney disease is not known. Moreover, the impact of muscle mass on creatinine level and GFR estimation is unknown. AIM AND METHODS: Our study aimed to evaluate the accuracy of different diagnostic tests available compared to the gold standard measurement of GFR...
2017: PloS One
https://www.readbyqxmd.com/read/29096154/meta-analysis-of-safety-and-efficacy-for-direct-oral-anticoagulation-treatment-of-non-valvular-atrial-fibrillation-in-relation-to-renal-function
#7
Rongjun Zou, Jun Tao, Wanting Shi, Minglei Yang, Hongmu Li, Xifeng Lin, Songran Yang, Ping Hua
INTRODUCTION: We performed a meta-analysis of the safety and efficacy of anticoagulation treatment for atrial fibrillation (AF) in relation to renal function. We also examined the change in estimated glomerular filtration rate (eGFR) from baseline and compared the outcomes for patients with stable and worsening renal function. MATERIALS AND METHODS: We selected studies that used randomized controlled trials in which outcomes for direct oral anticoagulants (DOACs) (dabigatran, rivaroxaban, apixaban, or edoxaban) were compared with those for warfarin in AF patients with normal, mild or moderate renal function, except the severe one (creatinine clearance<30)...
October 26, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/29091222/population-pharmacokinetics-of-teicoplanin-administered-by-subcutaneous-or-intravenous-route-and-simulation-of-optimal-loading-dose-regimen
#8
Yoann Cazaubon, Nicolas Venisse, Olivier Mimoz, Pascal Maire, Michel Ducher, Laurent Bourguignon, Sylvain Goutelle
Objectives: To investigate the population pharmacokinetics of teicoplanin in patients treated by the subcutaneous (sc) and/or intravenous (iv) route. Patients and methods: Non-linear mixed-effects modelling described teicoplanin concentrations from 98 patients with infection caused by Gram-positive cocci. Monte Carlo simulations were performed to evaluate the probability of target attainment (PTA) of various dosage regimens. Results: Teicoplanin concentrations were best described by a two-compartment model with clearance predicted by estimated glomerular filtration rate...
October 1, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29079274/glomerular-filtration-rate-is-associated-with-free-triiodothyronine-in-euthyroid-subjects-comparison-between-various-equations-to-estimate-renal-function-and-creatinine-clearance
#9
Josephine L C Anderson, Eke G Gruppen, Lynnda van Tienhoven-Wind, Michele F Eisenga, Hanne de Vries, Ron T Gansevoort, Stephan J L Bakker, Robin P F Dullaart
BACKGROUND: Effects of variations in thyroid function within the euthyroid range on renal function are unclear. Cystatin C-based equations to estimate glomerular filtration rate (GFR) are currently advocated for mortality and renal risk prediction. However, the applicability of cystatin C-based equations is discouraged in patients with overt thyroid dysfunction, since serum cystatin C and creatinine levels are oppositely affected by thyroid dysfunction. Here, we compared relationships of thyroid stimulating hormone (TSH), free thyroxine (FT4) and free triiodothyronine (FT3) with various measures of kidney function in euthyroid subjects...
October 24, 2017: European Journal of Internal Medicine
https://www.readbyqxmd.com/read/29075676/direct-acting-antivirals-in-kidney-transplant-patients-successful-hepatitis-c-treatment-and-short-term-reduction-in-urinary-protein-creatinine-ratios
#10
Michael R Goetsch, Ashutosh Tamhane, Mohit Varshney, Anuj Kapil, Edgar T Overton, Graham C Towns, Ricardo A Franco
BACKGROUND: The role of Hepatitis C Virus (HCV) clearance in kidney graft survival is unknown. We examined short-term trends of protein/creatinine (P/C) ratios in HCV-infected kidney transplant recipients treated with direct-acting antivirals (DAAs). METHODS: This is a retrospective study of 19 kidney transplant patients with HCV infection treated with DAAs at the University of Alabama at Birmingham between January 2013 and June 2016. Markers of glomerular damage were assessed using average urinary protein/creatinine (P/C) ratios measured pretreatment and posttreatment...
2017: Pathogens & Immunity
https://www.readbyqxmd.com/read/29063303/assessing-glomerular-filtration-in-small-animals-using-68-ga-dtpa-and-68-ga-edta-with-pet-imaging
#11
Daniel Gündel, Ulrike Pohle, Erik Prell, Andreas Odparlik, Oliver Thews
PURPOSE: Determining the glomerular filtration rate (GFR) is essential for clinical medicine but also for pre-clinical animal studies. Functional imaging using positron emission tomography (PET) allows repetitive almost non-invasive measurements. The aim of the study was the development and evaluation of easily synthesizable PET tracers for GFR measurements in small animals. PROCEDURES: Diethylenetriaminepentaacetic acid (DTPA) and ethylenediaminetetraacetic acid (EDTA) were labeled with Ga-68...
October 23, 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/29061086/pharmacogenetics-based-population-pharmacokinetic-analysis-of-tenofovir-in-thai-hiv-infected-patients
#12
Kanokrat Rungtivasuwan, Anchalee Avihingsanon, Narukjaporn Thammajaruk, Siwaporn Mitruk, David M Burger, Kiat Ruxrungtham, Chonlaphat Sukasem, Baralee Punyawudho
AIM: To develop a population pharmacokinetic model and identify sources of variability, genetic and nongenetic factors, of tenofovir. METHODS: The ABCC2 and ABCC4 polymorphisms were genotyped in 342 patients. A nonlinear mixed effects model was used to develop the population pharmacokinetic model and investigate the influence of these polymorphisms and other patient specific covariates on the pharmacokinetics of tenofovir. RESULTS: The estimated glomerular filtration rate calculated by the Cockcroft and Gault equation, concomitant use of lopinavir/ritonavir and ABCC4 3463A>G polymorphism were associated with tenofovir apparent oral clearance (CL/F)...
October 24, 2017: Pharmacogenomics
https://www.readbyqxmd.com/read/29054981/immunoadsorption-in-anti-gbm-glomerulonephritis-case-report-in-a-child-and-literature-review
#13
REVIEW
Guillaume Dorval, Mathilde Lion, Sophie Guérin, Saoussen Krid, Louise Galmiche-Rolland, Rémi Salomon, Olivia Boyer
Antiglomerular basement membrane glomerulonephritis (anti-GBM GN) is a rare autoimmune disease that is characterized by rapidly progressive glomerulonephritis that may be associated with pulmonary hemorrhage. Anti-GBM GN is caused by autoantibodies (classically type G immunoglobulin) directed against the α3 subunit of type IV collagen. Without any appropriate treatment, the disease is generally fulminant, and patient and kidney survival is poor. The current guidelines recommend the use of plasma exchanges and immunosuppressive drugs...
November 2017: Pediatrics
https://www.readbyqxmd.com/read/29051304/consequences-of-advanced-aging-on-renal-function-in-chronic-hyperandrogenemic-female-rat-model-implications-for-aging-women-with-polycystic-ovary-syndrome
#14
Chetan N Patil, Lorraine C Racusen, Jane F Reckelhoff
Polycystic ovary syndrome (PCOS) is the most common endocrine and reproductive disorder in premenopausal women, characterized by hyperandrogenemia, metabolic syndrome, and inflammation. Women who had PCOS during their reproductive years remain hyperandrogenemic after menopause. The consequence of chronic hyperandrogenemia with advanced aging has not been studied to our knowledge. We have characterized a model of hyperandrogenemia in female rats and have aged them to 22-25 months to mimic advanced aging in hyperandrogenemic women, and tested the hypothesis that chronic exposure to hyperandrogenemia with aging has a deleterious effect on renal function...
November 2017: Physiological Reports
https://www.readbyqxmd.com/read/29051055/skeletal-impairment-in-pierson-syndrome-is-there-a-role-for-laminin%C3%AE-2-in-bone-physiology
#15
Camille Beaufils, Delphine Farlay, Irma Machuca-Gayet, Alice Fassier, Martin Zenker, Caroline Freychet, Edith Bonnelye, Aurélia Bertholet-Thomas, Bruno Ranchin, Justine Bacchetta
INTRODUCTION: Pierson syndrome is caused by a mutation of LAMB2, encoding for laminin β2. Clinical phenotype is variable but usually associates congenital nephrotic syndrome (CNS) and ocular abnormalities. Neuromuscular impairment has also been described. METHODS: We report on a 15-year old girl, suffering from Pierson Syndrome, who developed severe bone deformations during puberty. This patient initially displayed CNS and microcoria, leading to the clinical diagnosis of Pierson syndrome...
October 16, 2017: Bone
https://www.readbyqxmd.com/read/29050175/-effects-of-retroperitoneal-laparoscopic-ureterolithotomy-and-flexible-ureteroscopic-holmium-laser-lithotripsy-for-complex-upper-ureteral-calculi
#16
L J Zhang, B Wu, Z L Zha, H Zhao, W Yang, X H Chen, B Jiang, Q Huang, W J Li, J Yuan
Objective: To explore the clinical effects of retroperitoneal laparoscopic ureterolithotomy (RPLU) and flexible-ureteroscopic holmium laser lithotripsy (f-UHLL) for complicated upper ureteral calculi. Methods: A total of 45 cases of complicated upper ureteral calculi between March 2014 and January 2016 in Department of Urology, Affiliated Jiangyin Hospital of Southeast University Medical College were retrospectively analyzed, there were 32 males and 13 females, ranging from 27 to 45 years with an average age of (34...
October 1, 2017: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/29048463/interleukin-9-mediates-chronic-kidney-disease-dependent-vein-graft-disease-a-role-for-mast-cells
#17
Lisheng Zhang, Jiao-Hui Wu, James C Otto, Susan B Gurley, Elizabeth R Hauser, Sudha K Shenoy, Karim Nagi, Leigh Brian, Virginia Wertman, Natalie Mattocks, Jeffrey H Lawson, Neil J Freedman
Aims: Chronic kidney disease (CKD) is a powerful independent risk factor for cardiovascular events, including vein graft failure. Because CKD impairs the clearance of small proteins, we tested the hypothesis that CKD exacerbates vein graft disease by elevating serum levels of critical cytokines that promote vein graft neointimal hyperplasia. Methods and results: We modelled CKD in C57BL/6 mice with 5/6ths nephrectomy, which reduced glomerular filtration rate by 60%, and we modelled vein grafting with inferior-vena-cava-to-carotid interposition grafting...
November 1, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/29040701/comparison-of-glomerular-filtration-rate-estimating-equations-derived-from-creatinine-and-cystatin-c-validation-in-the-age-gene-environment-susceptibility-reykjavik-elderly-cohort
#18
Jonas Björk, Anders Grubb, Vilmundur Gudnason, Olafur S Indridason, Andrew S Levey, Runolfur Palsson, Ulf Nyman
Background: Validation studies comparing glomerular filtration rate (GFR) equations based on standardized creatinine and cystatin C assays in the elderly are needed. The Icelandic Age, Gene/Environment Susceptibility-Kidney cohort was used to compare two pairs of recently developed GFR equations, the revised Lund-Malmö creatinine equation (LMRCr) and the arithmetic mean of the LMRCr and Caucasian, Asian, Paediatric and Adult cystatin C equations (MEANLMR+CAPA), as well as the Full Age Spectrum creatinine equation (FASCr) and its combination with cystatin C (FASCr+Cys), with the corresponding pair of Chronic Kidney Disease Epidemiology Collaboration equations (CKD-EPICr and CKD-EPICr+Cys)...
October 5, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29038390/dietary-animal-derived-l-arginine-intakes-and-risk-of-chronic-kidney-disease-a-6-year-follow-up-of-tehran-lipid-and-glucose-study
#19
Zahra Bahadoran, Parvin Mirmiran, Mahdieh Golzarand, Reihaneh Davudabadi-Farahani, Fereidoun Azizi
INTRODUCTION: There is inconsistent evidence regarding the potential role of L-arginine intake on kidney function. This study investigated the association of dietary L-arginine intake and the risk of chronic kidney disease (CKD) in adults. MATERIALS AND METHODS: We evaluated 1780 men and women participated in the Tehran Lipid and Glucose Study, followed for a median of 6.3 years. Dietary intakes of total L-arginine as well as animal- and plant-derived L-arginine were assessed using the validated semi-quantitative food frequency questionnaire, at baseline...
October 2017: Iranian Journal of Kidney Diseases
https://www.readbyqxmd.com/read/29038272/population-pharmacokinetic-analysis-of-cefiderocol-a-parenteral-siderophore-cephalosporin-in-healthy-subjects-subjects-with-varying-renal-function-and-patients-with-complicated-urinary-tract-infection-or-acute-uncomplicated-pyelonephritis
#20
Nao Kawaguchi, Takayuki Katsube, Roger Echols, Toshihiro Wajima
Cefiderocol, a novel parenteral siderophore cephalosporin, exhibits potent efficacy against most Gram-negative bacteria including carbapenem-resistant strains. The aim of this study is to perform a population pharmacokinetic (PK) analysis based on plasma cefiderocol concentrations in healthy subjects, subjects with varying renal function, and patients with complicated urinary tract infection (cUTI) or acute uncomplicated pyelonephritis (AUP) caused by Gram-negative pathogens, and to calculate the fraction of time during the dosing interval where the free drug concentration in plasma exceeds the minimum inhibitory concentration (MIC) (fT>MIC)...
October 16, 2017: Antimicrobial Agents and Chemotherapy
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