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https://www.readbyqxmd.com/read/28315591/reference-ranges-and-impact-of-selected-confounders-on-classic-serum-and-urinary-renal-markers-in-neonatal-period
#1
Monika Miklaszewska, Przemysław Korohoda, Przemko Kwinta, Katarzyna Zachwieja, Tomasz Tomasik, Katarzyna Kiliś-Pstrusińska, Dorota Drożdż
PURPOSE: Renal injury in term and pre-term neonates may be an antecedent to chronic kidney disease in the child's further life. The aim of the paper was to compile a reference range for selected serum and urinary renal markers in the neonatal period for full-term (FT) and pre-term (PT) newborns. MATERIAL AND METHODS: The prospective study included 23 FT infants (birth weight - BW≥2500g and gestational age - GA≥37Hbd) and 32 PT children (BW<2500g and GA<37Hbd) in good general condition, without acute kidney injury (AKI) or sepsis...
March 15, 2017: Advances in Medical Sciences
https://www.readbyqxmd.com/read/28288570/effect-of-tolvaptan-on-renal-water-and-sodium-excretion-and-blood-pressure-during-nitric-oxide-inhibition-a-dose-response-study-in-healthy-subjects
#2
Safa Al Therwani, Jeppe Bakkestrøm Rosenbæk, Frank Holden Mose, Jesper Nørgaard Bech, Erling Bjerregaard Pedersen
BACKGROUND: Tolvaptan is a selective vasopressin receptor antagonist. Nitric Oxide (NO) promotes renal water and sodium excretion, but the effect is unknown in the nephron's principal cells. In a dose-response study, we measured the effect of tolvaptan on renal handling of water and sodium and systemic hemodynamics, during baseline and NO-inhibition with L-NMMA (L-NG-monomethyl-arginine). METHODS: In a randomized, placebo-controlled, double blind, cross over study, 15 healthy subjects received tolvaptan 15, 30 and 45 mg or placebo...
March 13, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28177696/assessment-of-renal-function-in-the-anaesthetised-rat-following-injection-of-superparamagnetic-iron-oxide-nanoparticles
#3
Deirdre Edge, Christine M Shortt, E J Johns, Oliviero L Gobbo, Farouk Markos, Mohammed H Abdulla, Elaine F Barry
A recent study showed that a significant fall in mean arterial pressure (MAP) occurred following intravenous injection of two novel superparamagnetic iron oxide nanoparticles (SPIONs), MF66 and OD15. To assess if this was caused by excessive glomerular clearance, the effect of both particles on renal function was studied. Experiments were performed on sodium pentobarbital anaesthetised male Wistar rats (250-350 g). Twenty-minute urine clearances were taken followed by an i.v. bolus of MF66, OD15 (2 mg·kg(-1)), or dH2O (0...
November 14, 2016: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28068947/urinary-neutrophil-gelatinase-associated-lipocalin-in-the-evaluation-of-patent-ductus-arteriosus-and-aki-in-very-preterm-neonates-a-cohort-study
#4
Anna Sellmer, Bodil H Bech, Jesper V Bjerre, Michael R Schmidt, Vibeke E Hjortdal, Gitte Esberg, Søren Rittig, Tine B Henriksen
BACKGROUND: A patent ductus arteriosus (PDA) is frequently found in very preterm neonates and is associated with increased risk of morbidity and mortality. A shunt across a PDA can result in an unfavorable distribution of the cardiac output and may in turn result in poor renal perfusion. Urinary Neutrophil Gelatinase-associated Lipocalin (U-NGAL) is a marker of renal ischemia and may add to the evaluation of PDA. Our primary aim was to investigate if U-NGAL is associated with PDA in very preterm neonates...
January 10, 2017: BMC Pediatrics
https://www.readbyqxmd.com/read/28008340/fractional-excretion-of-sodium-in-hepatorenal-syndrome-clinical-and-pathological-correlation
#5
Ali A Alsaad, Hani M Wadei
AIM: To determine the accuracy of fractional excretion of sodium (FeNa) in the diagnosis of hepatorenal syndrome (HRS). METHODS: Eighty-eight liver transplantation candidates with renal dysfunction and/or proteinuria were included in the study sample. The baseline characteristics of the patients were obtained. All the 88 patients underwent iothalamate glomerular filtration rate testing, 24-h urine collection for urinary sodium and protein excretions, random urine for sodium and creatinine testing, and percutaneous kidney biopsy...
December 8, 2016: World Journal of Hepatology
https://www.readbyqxmd.com/read/27984746/mammalian-rad52-functions-in-break-induced-replication-repair-of-collapsed-dna-replication-forks
#6
Sotirios K Sotiriou, Irene Kamileri, Natalia Lugli, Konstantinos Evangelou, Caterina Da-Ré, Florian Huber, Laura Padayachy, Sebastien Tardy, Noemie L Nicati, Samia Barriot, Fena Ochs, Claudia Lukas, Jiri Lukas, Vassilis G Gorgoulis, Leonardo Scapozza, Thanos D Halazonetis
Human cancers are characterized by the presence of oncogene-induced DNA replication stress (DRS), making them dependent on repair pathways such as break-induced replication (BIR) for damaged DNA replication forks. To better understand BIR, we performed a targeted siRNA screen for genes whose depletion inhibited G1 to S phase progression when oncogenic cyclin E was overexpressed. RAD52, a gene dispensable for normal development in mice, was among the top hits. In cells in which fork collapse was induced by oncogenes or chemicals, the Rad52 protein localized to DRS foci...
December 15, 2016: Molecular Cell
https://www.readbyqxmd.com/read/27856008/comprehensive-renal-function-evaluation-in-patients-treated-for-synchronous-bilateral-wilms-tumor
#7
Rodrigo B Interiano, M Beth McCarville, Noel Delos Santos, Shenghua Mao, Jianrong Wu, Jeffrey S Dome, Kathleen Kieran, Mark A Williams, Rachel C Brennan, Matthew J Krasin, Daniel M Green, Andrew M Davidoff
OBJECTIVES: The purpose of this study was to perform a comprehensive assessment of long-term renal function in patients treated at our institution for synchronous bilateral Wilms tumor (BWT) and to determine the optimal method for estimating glomerular filtration rate (eGFR). METHODS: Surgical approach, adjuvant therapy, and pathology reports were reviewed for patients with at least six months follow-up from definitive surgery. eGFRs, as assessed by the Schwartz and Chronic Kidney Disease in Children (CKiD) formulas, were compared to measured GFR (mGFR) determined by (99m)Tc-DTPA scanning...
January 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/27727024/renal-functional-responses-in-diabetic-nephropathy-following-chronic-bilateral-renal-denervation
#8
Yimin Yao, Gerard Davis, Joanne C Harrison, Robert J Walker, Ivan A Sammut
Renal innervation operates in conjunction with the intrarenal renin-angiotensin system (RAS) to control tubular reabsorption of sodium and water. This relationship remains unexplored in diabetic nephropathy. This study investigates the effects of acute RAS inhibition and chronic renal denervation on renal function in diabetic rats. Diabetes was induced in mRen-2 rats prior to conducting chronic bilateral denervation in diabetic and normoglycaemic animals. At 12-weeks post-diabetic induction, renal haemodynamics and tubular handling of sodium and water were measured before and after acute captopril infusion...
October 3, 2016: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/27624603/the-effect-of-tolvaptan-on-renal-excretion-of-electrolytes-and-urea-nitrogen-in-patients-undergoing-coronary-artery-bypass-surgery
#9
Tomoko S Kato, Hiroshi Nakamura, Mai Murata, Kishio Kuroda, Hitoshi Suzuki, Yasutaka Yokoyama, Akie Shimada, Satoshi Matsushita, Taira Yamamoto, Atsushi Amano
BACKGROUND: Adequate fluid management is an important component of patient care following cardiac surgery. Our aim in this study was to determine the benefits of tolvaptan, an oral selective vasopressin-2 receptor antagonist that causes electrolyte-free water diuresis, in postoperative fluid management. We prospectively examined the effect of tolvaptan on renal excretion of electrolytes and urea nitrogen in cardiac surgery patients. METHODS: Patients undergoing coronary artery bypass surgery were randomized to receive conventional loop diuretics (Group C, n = 30) or conventional loop diuretic therapy plus tolvaptan (Group T, n = 27)...
2016: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/27611603/effect-of-fructose-on-promoting-fengycin-biosynthesis-in-bacillus-amyloliquefaciens-fmb-60
#10
H Lu, S Qian, U Muhammad, X Jiang, J Han, Z Lu
AIMS: To explore the influence of carbohydrates on the production of fengycin by Bacillus amyloliquefaciens fmb-60. METHODS AND RESULTS: Fermentation and gene expression levels were examined following culture supplementation with fructose, arabinose and sorbitol. Compared with other carbohydrates, fructose most efficiently increased the concentration of the essential component amino acids for fengycin synthesis in the cell. The maximum production of fengycin was found to be 392·87 mg l(-1) , increased by 76% in fed-batch fermentation...
December 2016: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/27585605/renal-effects-of-dpp-4-inhibitor-sitagliptin-or-glp-1-receptor-agonist-liraglutide-in-overweight-patients-with-type-2-diabetes-a-12-week-randomized-double-blind-placebo-controlled-trial
#11
Lennart Tonneijck, Mark M Smits, Marcel H A Muskiet, Trynke Hoekstra, Mark H H Kramer, A H Jan Danser, Piet M Ter Wee, Michaela Diamant, Jaap A Joles, Daniël H van Raalte
OBJECTIVE: To investigate effects of dipeptidyl peptidase-4 inhibitor (DPP-4I) sitagliptin or glucagon-like peptide 1 (GLP-1) receptor agonist liraglutide treatment on renal hemodynamics, tubular functions, and markers of renal damage in overweight patients with type 2 diabetes without chronic kidney disease (CKD). RESEARCH DESIGN AND METHODS: In this 12-week, randomized, double-blind trial, 55 insulin-naïve patients with type 2 diabetes (mean ± SEM: age 63 ± 7 years, BMI 31...
November 2016: Diabetes Care
https://www.readbyqxmd.com/read/27570581/the-effect-of-aliskiren-on-the-renal-dysfunction-following-unilateral-ureteral-obstruction-in-the-rat
#12
Fayez T Hammad, Loay Lubbad
PURPOSE: To investigate the effect of blocking renin-angiotensin system by direct renin inhibition using aliskiren on the renal dysfunction following reversible unilateral ureteral obstruction (UO). METHODS: Wistar rats underwent reversible left UO for 72 hours. Group-Alsk (n=12) received aliskiren (30 mg/kg/day) dissolved in water starting one day before creating UO and continued until the terminal experiment five days post reversal when renal functions were measured using clearance techniques...
2016: International Journal of Physiology, Pathophysiology and Pharmacology
https://www.readbyqxmd.com/read/27452198/effect-of-fenoldopam-continuous-infusion-on-glomerular-filtration-rate-and-fractional-excretion-of-sodium-in-healthy-dogs
#13
K L Kelly, K J Drobatz, J D Foster
BACKGROUND: Acute kidney injury (AKI) is a common problem in small-animal patients and carries a guarded prognosis with substantial morbidity and mortality, particularly in oligoanuric dogs. Fenoldopam, a selective dopamine agonist, has been shown to increase urine output in healthy dogs and cats; however, the mechanism of action is unknown. HYPOTHESIS/OBJECTIVES: To evaluate the effect of fenoldopam infusion on glomerular filtration rate (GFR) and fractional excretion of sodium (FeNa) in healthy dogs...
September 2016: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/27447787/real-time-urinary-electrolyte-monitoring-after-furosemide-administration-in-surgical-icu-patients-with-normal-renal-function
#14
Luca Zazzeron, Davide Ottolina, Eleonora Scotti, Michele Ferrari, Paola Bruzzone, Silvio Sibilla, Cristina Marenghi, Luciano Gattinoni, Pietro Caironi
BACKGROUND: Although the loop-diuretic furosemide is widely employed in critically ill patients with known long-term effects on plasma electrolytes, accurate data describing its acute effects on renal electrolyte handling and the generation of plasma electrolyte alterations are lacking. We hypothesized that the long-term effects of furosemide on plasma electrolytes and acid-base depend on its immediate effects on electrolyte excretion rate and patient clinical baseline characteristics...
December 2016: Annals of Intensive Care
https://www.readbyqxmd.com/read/27405971/remote-ischemic-perconditioning-attenuates-ischemia-reperfusion-induced-downregulation-of-aqp2-in-rat-kidney
#15
Marie Louise V Kristensen, Casper Kierulf-Lassen, Per Mose Nielsen, Søren Krag, Henrik Birn, Lene N Nejsum, Rikke Nørregaard
Renal ischemia/reperfusion (I/R) can lead to impaired urine concentration ability and increased fractional excretion of sodium (FeNa). Local ischemic preconditioning improves renal water and sodium handling after I/R injury. Here, we investigate whether remote ischemic perconditioning (rIPeC) prevents dysregulation of renal water and salt handling in response to I/R injury and mechanisms that may be involved. Rats were subjected to right nephrectomy and randomized into a sham group or an I/R group. In the I/R group, rats were subjected to 37 min of renal ischemia and 3 days of reperfusion...
July 2016: Physiological Reports
https://www.readbyqxmd.com/read/27348077/53bp1-fosters-fidelity-of-homology-directed-dna-repair
#16
Fena Ochs, Kumar Somyajit, Matthias Altmeyer, Maj-Britt Rask, Jiri Lukas, Claudia Lukas
Repair of DNA double-strand breaks (DSBs) in mammals is coordinated by the ubiquitin-dependent accumulation of 53BP1 at DSB-flanking chromatin. Owing to its ability to limit DNA-end processing, 53BP1 is thought to promote nonhomologous end-joining (NHEJ) and to suppress homology-directed repair (HDR). Here, we show that silencing 53BP1 or exhausting its capacity to bind damaged chromatin changes limited DSB resection to hyper-resection and results in a switch from error-free gene conversion by RAD51 to mutagenic single-strand annealing by RAD52...
August 2016: Nature Structural & Molecular Biology
https://www.readbyqxmd.com/read/27236480/urine-sodium-concentration-to-predict-fluid-responsiveness-in-oliguric-icu-patients-a-prospective-multicenter-observational-study
#17
MULTICENTER STUDY
Matthieu Legrand, Brigitte Le Cam, Sébastien Perbet, Claire Roger, Michael Darmon, Philippe Guerci, Axelle Ferry, Véronique Maurel, Sabri Soussi, Jean-Michel Constantin, Etienne Gayat, Jean-Yves Lefrant, Marc Leone
BACKGROUND: Oliguria is one of the leading triggers of fluid loading in patients in the intensive care unit (ICU). The purpose of this study was to assess the predictive value of urine Na(+) (uNa(+)) and other routine urine biomarkers for cardiac fluid responsiveness in oliguric ICU patients. METHODS: We conducted a prospective multicenter observational study in five university ICUs. Patients with urine output (UO) <0.5 ml/kg/h for 3 consecutive hours with a mean arterial pressure >65 mmHg received a fluid challenge...
May 29, 2016: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/27231835/nicardipine-effects-on-renal-function-during-spine-surgery
#18
Cholhee Park, Ji Young Kim, Chanmi Kim, Chul Ho Chang
STUDY DESIGN: Single-center, prospective, randomized, and single-blinded clinical trial was conducted in patients (n=64) undergoing anterior or posterior spinal interbody fusion. OBJECTIVE: To investigate the renal protective effect of nicardipine during deliberate hypotension for spine surgery by measuring creatinine clearance (Ccr), serum cystatin C, urine output, and fractional excretion of sodium (FENa). SUMMARY OF BACKGROUND DATA: Deliberate hypotension during spine surgery may result in ischemic tissue damage of the kidney...
May 27, 2016: Clinical Spine Surgery
https://www.readbyqxmd.com/read/27195290/valproic-acid-prevents-renal-dysfunction-and-inflammation-in-the-ischemia-reperfusion-injury-model
#19
Elerson C Costalonga, Filipe M O Silva, Irene L Noronha
Ischemia-reperfusion injury (IRI) is a major contributor to acute kidney injury (AKI). At present, there are no effective therapies to prevent AKI. The aim of this study was to analyse whether valproic acid (VPA), a histone deacetylase inhibitor with anti-inflammatory properties, prevents renal IRI. Male Wistar rats were divided into three groups: SHAM rats were subjected to a SHAM surgery, IRI rats underwent bilateral renal ischemia for 45 min, and IRI + VPA rats were treated with VPA at 300 mg/kg twice daily 2 days before bilateral IRI...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27038451/acute-renal-effects-of-the-glp-1-receptor-agonist-exenatide-in-overweight-type-2-diabetes-patients-a-randomised-double-blind-placebo-controlled-trial
#20
Lennart Tonneijck, Mark M Smits, Marcel H A Muskiet, Trynke Hoekstra, Mark H H Kramer, A H Jan Danser, Michaela Diamant, Jaap A Joles, Daniël H van Raalte
AIMS/HYPOTHESIS: This study aimed to investigate the acute renal effects of the glucagon-like peptide-1 receptor agonist (GLP-1RA) exenatide in type 2 diabetes patients. METHODS: We included overweight (BMI 25-40 kg/m(2)) men and postmenopausal women, aged 35-75 years with type 2 diabetes (HbA1c 48-75 mmol/mol; 6.5-9.0%) and estimated GFR ≥ 60 ml min(-1) 1.73 m(-2). Exenatide or placebo (NaCl solution, 154 mmol/l) was administrated intravenously in an acute, randomised, double-blind, placebo-controlled trial conducted at the Diabetes Center VU University Medical Center (VUMC)...
July 2016: Diabetologia
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