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Clearance glomerular filtration rate

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https://www.readbyqxmd.com/read/29340320/association-of-a-low-protein-diet-with-slower-progression-of-ckd
#1
Marie Metzger, Wen Lun Yuan, Jean-Philippe Haymann, Martin Flamant, Pascal Houillier, Eric Thervet, Jean-Jacques Boffa, François Vrtovsnik, Marc Froissart, Lise Bankir, Denis Fouque, Bénédicte Stengel
Introduction: Reducing protein intake is recommended for slowing chronic kidney disease (CKD) progression, but assessment of its true effectiveness is sparse. Methods: Using the Maroni formula, we assessed dietary protein intake (DPI) from 24-hour urinary urea excretion in 1594 patients (67% men and 33% women) with CKD, 784 of whom also had 7-day food records. Cause-specific hazard ratios (HRs) and 95% confidence intervals for the competing risks of DPI-associated end-stage renal disease (ESRD) or death were estimated in 1412 patients with baseline glomerular filtration rate ≥15 ml/min per 1...
January 2018: KI Reports
https://www.readbyqxmd.com/read/29338933/physiological-based-pharmacokinetic-modeling-to-estimate-in%C3%A2-vivo-ki-of-ketoconazole-on-renal-p-gp-using-human-drug-drug-interaction-study-result-of-fesoterodine-and-ketoconazole
#2
Masayo Oishi, Yuma Takano, Yutaka Torita, Bimal Malhotra, Koji Chiba
This study was conducted to estimate in vivo inhibition constant (Ki) of ketoconazole on renal P-glycoprotein (P-gp) using human drug-drug interaction (DDI) study result of fesoterodine and ketoconazole. Fesoterodine is a prodrug which is extensively hydrolyzed by non-specific esterases to the active metabolite 5-hydroxymethyl tolterodine (5-HMT). 5-HMT is then further metabolized via Cytochrome P450 (CYP) 2D6 and CYP3A4. It is reported that 5-HMT is a substrate of P-gp whereas fesoterodine is not. Renal clearance of 5-HMT is approximately two-times greater than renal glomerular filtration rate...
November 15, 2017: Drug Metabolism and Pharmacokinetics
https://www.readbyqxmd.com/read/29329247/a-simple-method-to-measure-renal-function-in-swine-by-the-plasma-clearance-of-iohexol
#3
Sergio Luis-Lima, Consolación García-Contreras, Marta Vázquez-Gómez, Susana Astiz, Fabiola Carrara, Flavio Gaspari, Natalia Negrín-Mena, Alejandro Jiménez-Sosa, Hugo Jiménez-Hernández, Antonio González-Bulnes, Esteban Porrini
There is no simple method to measure glomerular filtration rate (GFR) in swine, an established model for studying renal disease. We developed a protocol to measure GFR in conscious swine by using the plasma clearance of iohexol. We used two groups, test and validation, with eight animals each. Ten milliliters of iohexol (6.47 g) was injected into the marginal auricular vein and blood samples (3 mL) were collected from the orbital sinus at different points after injection. GFR was determined using two models: two-compartment (CL2: all samples) and one-compartment (CL1: the last six samples)...
January 12, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29322215/-assessment-of-kidney-function-creatinine-is-not-the-whole-story
#4
REVIEW
U Huynh-Do, M Fiedler, B Vogt
Chronic renal insufficiency has a high prevalence and leads not only to a severe impairment in the quality of life but also to a higher mortality, mainly due to cardiovascular complications; however, in the early stages where there is still a chance for a therapeutic intervention, it is often underestimated because depending on endogenous factors (e.g. age and muscle mass), serum creatinine could falsely remain in the normal range while kidney function is already impaired. An exact measurement of the glomerular filtration rate (GFR) using radionuclide techniques is cumbersome and usually confined to rare cases, such as in clinical studies...
January 10, 2018: Der Internist
https://www.readbyqxmd.com/read/29319814/single-versus-multiple-sample-method-to-measure-glomerular-filtration-rate
#5
Pierre Delanaye, Martin Flamant, Laurence Dubourg, Emmanuelle Vidal-Petiot, Sandrine Lemoine, Etienne Cavalier, Elke Schaeffner, Natalie Ebert, Hans Pottel
Background: There are many different ways to measure glomerular filtration rate (GFR) using various exogenous filtration markers, each having their own strengths and limitations. However, not only the marker, but also the methodology may vary in many ways, including the use of urinary or plasma clearance, and, in the case of plasma clearance, the number of time points used to calculate the area under the concentration-time curve, ranging from only one (Jacobsson method) to eight (or more) blood samples...
January 8, 2018: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29315212/higher-protein-intake-is-not-associated-with-decreased-kidney-function-in-pre-diabetic-older-adults-following-a-one-year-intervention-a-preview-sub-study
#6
Grith Møller, Jens Rikardt Andersen, Christian Ritz, Marta P Silvestre, Santiago Navas-Carretero, Elli Jalo, Pia Christensen, Elizabeth Simpson, Moira Taylor, J Alfredo Martinez, Ian Macdonald, Nils Swindell, Kelly A Mackintosh, Gareth Stratton, Mikael Fogelholm, Thomas M Larsen, Sally D Poppitt, Lars O Dragsted, Anne Raben
Concerns about detrimental renal effects of a high-protein intake have been raised due to an induced glomerular hyperfiltration, since this may accelerate the progression of kidney disease. The aim of this sub-study was to assess the effect of a higher intake of protein on kidney function in pre-diabetic men and women, aged 55 years and older. Analyses were based on baseline and one-year data in a sub-group of 310 participants included in the PREVIEW project (PREVention of diabetes through lifestyle Intervention and population studies in Europe and around the World)...
January 9, 2018: Nutrients
https://www.readbyqxmd.com/read/29311069/meropenem-vaborbactam-single-dose-pharmacokinetics-and-safety-in-subjects-with-chronic-renal-impairment
#7
Christopher M Rubino, Sujata M Bhavnani, Jeffery S Loutit, Brooke Lohse, Michael N Dudley, David C Griffith
Vaborbactam is a member of a new class of β-lactamase inhibitors with inhibitory activity against serine carbapenemases (e.g. Klebsiella pneumoniae carbapenemase) that has been developed in combination with meropenem. Pharmacokinetics of the combination were evaluated in 41 subjects with chronic renal impairment in a Phase 1, open-label, single-dose study. Subjects were assigned to one of five groups based on renal function: normal (creatinine clearance ≥90 mL/min), mild (estimated glomerular filtration rate [eGFR] 60-89 mL/min/1...
January 8, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29299798/mild-renal-dysfunction-defined-by-creatinine-clearance-rate-has-limited-impact-on-clinical-outcomes-after-allogeneic-hematopoietic-stem-cell-transplantation
#8
Shuntaro Ikegawa, Ken-Ichi Matsuoka, Tomoko Inomata, Naoto Ikeda, Hiroyuki Sugiura, Taiga Kuroi, Takeru Asano, Shohei Yoshida, Hisakazu Nishimori, Nobuharu Fujii, Eisei Kondo, Yoshinobu Maeda, Mitsune Tanimoto
Creatinine clearance rate (Ccr) is a more accurate indicator of renal function than serum creatinine. Data are sparse regarding the prognostic value of renal impairment calculated using Ccr in patients who undergo allogeneic hematopoietic stem cell transplantation (allo-HSCT). We performed a retrospective analysis of 185 patients who underwent allo-HSCT. These patients were divided into two groups by Ccr (ml/min) before transplantation; one showed normal renal function (Ccr ≥ 60, n = 156) and the other showed mild renal dysfunction (30 ≤ Ccr < 60, n = 29), and transplant outcomes were compared between the groups...
January 4, 2018: International Journal of Hematology
https://www.readbyqxmd.com/read/29291380/unique-metabolomic-signature-associated-with-hepatorenal-dysfunction-and-mortality-in-cirrhosis
#9
Ayse L Mindikoglu, Antone R Opekun, Nagireddy Putluri, Sridevi Devaraj, David Sheikh-Hamad, John M Vierling, John A Goss, Abbas Rana, Gagan K Sood, Prasun K Jalal, Lesley A Inker, Robert P Mohney, Hocine Tighiouart, Robert H Christenson, Thomas C Dowling, Matthew R Weir, Stephen L Seliger, William R Hutson, Charles D Howell, Jean-Pierre Raufman, Laurence S Magder, Cristian Coarfa
The application of nontargeted metabolomic profiling has recently become a powerful noninvasive tool to discover new clinical biomarkers. This study aimed to identify metabolic pathways that could be exploited for prognostic and therapeutic purposes in hepatorenal dysfunction in cirrhosis. One hundred three subjects with cirrhosis had glomerular filtration rate (GFR) measured using iothalamate plasma clearance, and were followed until death, transplantation, or the last encounter. Concomitantly, plasma metabolomic profiling was performed using ultra-performance liquid chromatography-tandem mass spectrometry to identify preliminary metabolomic biomarker candidates...
December 12, 2017: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/29290908/liver-decompensation-predicts-ribavirin-overexposure-in-hepatitis-c-virus-patients-treated-with-direct-acting-antivirals
#10
Viola Guardigni, Lorenzo Badia, Matteo Conti, Matteo Rinaldi, Rita Mancini, Pierluigi Viale, Gabriella Verucchi
AIM: To determine whether ribavirin (RBV) concentrations differ according to cirrhosis stage among cirrhotic patients treated with interferon-free regimens. METHODS: We included patients with hepatitis C virus and cirrhosis [Child-Pugh (CP) A or B], Glomerular Filtration Rate ≥ 60 mL/min, who started therapy with DAAs and weight-based RBV between October 2014 and February 2016. RBV plasma levels were assessed during the treatment. We focused our analysis on the first 8 wk of therapy...
December 8, 2017: World Journal of Hepatology
https://www.readbyqxmd.com/read/29288261/selection-and-short-term-outcomes-of-living-kidney-donors-in-singapore-an-analysis-of-the-donor-care-registry
#11
Marc Zj Ho, Huili Zheng, Jeannette Jm Lee, Khuan Yew Chow, Gek Hsiang Lim, Wei Wei Hong, Anantharaman Vathsala
INTRODUCTION: Transplant rates in Singapore have been falling and there is limited information on baseline characteristics and clinical outcomes of living kidney donors nationally. This study aimed to determine the safety of living kidney donor transplant in Singapore by exploring the proportion of donors that meets international selection guidelines and describing short-term clinical outcomes. MATERIALS AND METHODS: We analysed 472 donors who underwent nephrectomies from 1 January 2010 to 31 December 2014 from the Donor Care Registry...
November 2017: Annals of the Academy of Medicine, Singapore
https://www.readbyqxmd.com/read/29283932/glomerular-filtration-rate-is-unchanged-by-ultramarathon
#12
Wojciech Wołyniec, Wojciech Ratkowski, Katarzyna Kasprowicz, Zbigniew Jastrzębski, Sylwia Małgorzewicz, Konrad Witek, Tomasz Grzywacz, Piotr Żmijewski, Marcin Renke
THE MAIN PROBLEM: Acute kidney injury (AKI) is reported as a common complication of marathon and ultramarathon running. In previous studies AKI was diagnosed on the basis of the creatinine level in serum and estimated glomerular filtration rate (eGFR). In the present study we calculated eGFR and also measured creatinine clearance after every 25 km of a 100 km run. METHODS: 20 healthy, amateur runners (males, mean age 40.75 ± 7.15 years, mean weight 76.87 ± 8.39 kg) took part in a 100 km run on a track...
December 27, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29281176/the-impact-of-the-glomerular-filtration-rate-on-the-human-plasma-proteome
#13
Anders Christensson, Jessica A Ash, Robert K DeLisle, Fraser W Gaspar, Rachel Ostroff, Anders Grubb, Veronica Lindström, Laila Bruun, Steve A Williams
PURPOSE: The application of proteomics in chronic kidney disease (CKD) can potentially uncover biomarkers and pathways that are predictive of disease. EXPERIMENTAL DESIGN: Within this context, this study examined the relationship between the human plasma proteome and glomerular filtration rate (GFR) as measured by iohexol clearance in a cohort from Sweden (N = 389; GFR range: 8 - 100 mL/min/1.73m2 ). A total of 2893 proteins were quantified using a modified aptamer assay...
December 27, 2017: Proteomics. Clinical Applications
https://www.readbyqxmd.com/read/29240010/well-preserved-renal-function-in-children-with-untreated-chronic-liver-disease
#14
Ulla B Berg, Antal Németh
OBJECTIVES: Based on studies with hepatorenal syndrome, it is widely regarded that renal function is impacted in chronic liver disease. Therefore we investigated renal function in our children with chronic liver disease. METHODS: In a retrospective study of 277 children with chronic liver disease, renal function was investigated as glomerular filtration rate (GFR) and effective renal plasma flow (ERPF), measured as clearance of inulin and para-amino hippuric acid or clearance of iohexol...
December 12, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/29238217/effects-of-voluntary-exercise-on-blood-pressure-angiotensin-ii-aldosterone-and-renal-function-in-two-kidney-one-clip-hypertensive-rats
#15
Brian M Waldman, Robert A Augustyniak, Haiping Chen, Noreen F Rossi
Spontaneous dynamic exercise promotes sympathoinhibition and decreases arterial pressure in two-kidney, one-clip (2K-1C) hypertensive rats. Renal sympathetic nerves stimulate renin secretion and increase renal tubular sodium reabsorption. We hypothesized that daily voluntary wheel running exercise by 2K-1C rats will decrease mean arterial pressure (MAP), plasma angiotensin II (Ang II), and aldosterone as well as normalize urinary sodium and potassium excretion independent of changes in glomerular filtration rate (GFR)...
2017: Integrated Blood Pressure Control
https://www.readbyqxmd.com/read/29229165/measurement-and-estimation-of-glomerular-filtration-rate-in-children
#16
REVIEW
Ayesa N Mian, George J Schwartz
Rapid, accurate, and precise measures of kidney function are essential for daily management of patients. While plasma and urinary clearances provide the greatest accuracy for assessing glomerular filtration rate (GFR), these are often impractical particularly for the care of children. Serum creatinine, the most commonly used endogenous marker, is simple, convenient, and practical but less accurate because of the influence of non-GFR determinants such as muscle mass, which increases with age in children. GFR estimating equations have been developed for adults and children to improve the accuracy of endogenous biomarkers, such as creatinine and cystatin C, by accounting for some of the non-GFR determinants, thus enhancing the practitioner's ability to assess GFR...
November 2017: Advances in Chronic Kidney Disease
https://www.readbyqxmd.com/read/29214443/contribution-of-symmetric-dimethylarginine-to-gfr-decline-in-pediatric-chronic-kidney-disease
#17
Ellen R Brooks, Shannon Haymond, Alfred Rademaker, Christopher Pierce, Irene Helenowski, Rod Passman, Faye Vicente, Bradley A Warady, Susan L Furth, Craig B Langman
BACKGROUND: In pediatric chronic kidney disease (pCKD), traditional factors (proteinuria, etiology, and race) do not fully explain disease progression. The levels of methylated arginine derivatives (MADs: asymmetric and symmetric dimethylarginine, respectively) rise in CKD and increase with CKD progression. The impact of MADs on glomerular filtration rate (GFR) decline has not been examined in pCKD. The aim of this study was to examine the additive impact of baseline (BL) levels of MADs on directly measured GFR (mGFR) decline per year (ml/min/1...
December 7, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/29211858/iohexol-plasma-clearance-simplified-by-dried-blood-spot-testing
#18
Sergio Luis-Lima, Flavio Gaspari, Natalia Negrín-Mena, Fabiola Carrara, Laura Díaz-Martín, Alejandro Jiménez-Sosa, Federico González-Rinne, Armando Torres, Esteban Porrini
Background: Renal function can be estimated with formulas, which are inaccurate, or measured with gold standard methods, which are reliable but unpractical. We propose to simplify the plasma clearance of iohexol, a gold standard method to measure renal function, by dried blood spot (DBS) testing. Methods: We compared glomerular filtration rate (GFR) values assessed by DBS and the reference plasma analysis technique. We tested in vitro the agreement between non-volumetric and volumetric DBS with the reference technique...
December 4, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29196838/inverse-correlation-between-left-ventricular-end-diastolic-pressure-and-contrast-induced-nephropathy-in-patients-undergoing-percutaneous-coronary-intervention
#19
Guoqiang Gu, Hanghang Xing, Yaqing Zhou, Wei Cui
BACKGROUND: There is a rising incidence of contrast-induced nephropathy (CIN), which is defined as either a 25% relative increase or an absolute increase of 0.5 mg/dL (44.2 µmol/L) in the serum creatinine (Scr) level at 48-72 h after administration of iodinated contrast media (CM). We investigated the relationship between left ventricular end-diastolic pressure (LVEDP) and CIN in patients undergoing percutaneous coronary intervention (PCI). METHODS: A total of 431 consecutive patients with coronary artery disease undergoing PCI were divided into four groups based on LVEDP quartile cut-off points...
December 1, 2017: Clinical and Experimental Nephrology
https://www.readbyqxmd.com/read/29194145/continuous-infusion-of-low-dose-iohexol-measures-changing-glomerular-filtration-rate-in-critically-ill-patients
#20
John J Dixon, Katie Lane, R Neil Dalton, Charles Turner, Iain A M MacPhee, Irina Chis Ster, Barbara J Philips
OBJECTIVE: Measurement of changing glomerular filtration rate in acute kidney injury remains problematic. We have previously used a continuous infusion of low-dose Iohexol to measure glomerular filtration rate in stable subjects and postulate that changes greater than 10.3% in critically ill patients indicate acute kidney injury. Our objective is to explore the extent to which continuous infusion of low-dose Iohexol can be a measure of changing glomerular filtration rate during acute kidney injury...
November 30, 2017: Critical Care Medicine
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