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water and progression of renal disease

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https://www.readbyqxmd.com/read/28910788/uremia-retention-molecules-and-clinical-outcomes
#1
Fellype Carvalho Barreto, Daniela Veit Barreto, Maria Eugênia Fernandes Canziani
Chronic kidney disease is characterized by the accumulation of organic compounds in the bloodstream that may exert a variety of toxic effects in the body. These compounds, collectively known as uremic toxins, may be classified according to their physicochemical properties as free water-soluble low molecular weight molecules, middle molecules or protein-bound uremic toxins. Most of these retention molecules, due to either their size and/or binding to protein, constitute a complex therapeutic challenge to the nephrologist, particularly in end-stage renal disease, because of their limited removal by conventional dialysis therapies...
2017: Contributions to Nephrology
https://www.readbyqxmd.com/read/28905441/the-vasopressin-system-new-insights-for-patients-with-kidney-diseases-epidemiological-evidence-and-therapeutic-perspectives
#2
W F Clark, O Devuyst, R Roussel
People with chronic kidney disease (CKD) are at risk of severe outcomes, such as end-stage renal disease or cardiovascular disease, and CKD is a globally increasing health burden with a high personal and economic cost. Despite major progresses in prevention and therapeutics in last decades, research is still needed to reverse this epidemic trend. The regulation of water balance and the state of activation of the vasopressin system have emerged as factors tightly associated with kidney health, in the general population but also in specific conditions; among them, various stages of CKD, diabetes and autosomal dominant polycystic kidney disease (ADPKD)...
October 2017: Journal of Internal Medicine
https://www.readbyqxmd.com/read/28873450/bromide-supplementation-exacerbated-the-renal-dysfunction-injury-and-fibrosis-in-a-mouse-model-of-alport-syndrome
#3
Tsubasa Yokota, Kohei Omachi, Mary Ann Suico, Haruka Kojima, Misato Kamura, Keisuke Teramoto, Shota Kaseda, Jun Kuwazuru, Tsuyoshi Shuto, Hirofumi Kai
A seminal study recently demonstrated that bromide (Br-) has a critical function in the assembly of type IV collagen in basement membrane (BM), and suggested that Br- supplementation has therapeutic potential for BM diseases. Because salts of bromide (KBr and NaBr) have been used as antiepileptic drugs for several decades, repositioning of Br- for BM diseases is probable. However, the effects of Br- on glomerular basement membrane (GBM) disease such as Alport syndrome (AS) and its impact on the kidney are still unknown...
2017: PloS One
https://www.readbyqxmd.com/read/28832640/restored-nitric-oxide-bioavailability-reduces-the-severity-of-acute-to-chronic-transition-in-a-mouse-model-of-aristolochic-acid-nephropathy
#4
Inès Jadot, Vanessa Colombaro, Blanche Martin, Isabelle Habsch, Olivia Botton, Joëlle Nortier, Anne-Emilie Declèves, Nathalie Caron
Aristolochic Acid (AA) nephropathy (AAN) is a progressive tubulointerstitial nephritis characterized by an early phase of acute kidney injury (AKI) leading to chronic kidney disease (CKD). The reduced nitric oxide (NO) bioavailability reported in AAN might contribute to renal function impairment and progression of the disease. We previously demonstrated that L-arginine (L-Arg) supplementation is protective in AA-induced AKI. Since the severity of AKI may be considered a strong predictor of progression to CKD, the present study aims to assess the potential benefit of L-Arg supplementation during the transition from the acute phase to the chronic phase of AAN...
2017: PloS One
https://www.readbyqxmd.com/read/28810844/effect-of-tolvaptan-on-renal-handling-of-water-and-sodium-gfr-and-central-hemodynamics-in-autosomal-dominant-polycystic-kidney-disease-during-inhibition-of-the-nitric-oxide-system-a-randomized-placebo-controlled-double-blind-crossover-study
#5
Safa Al Therwani, My Emma Sofie Malmberg, Jeppe Bakkestroem Rosenbaek, Jesper Noergaard Bech, Erling Bjerregaard Pedersen
BACKGROUND: Tolvaptan slows progression of autosomal dominant polycystic kidney disease (ADPKD) by antagonizing the vasopressin-cAMP axis. Nitric oxide (NO) stimulates natriuresis and diuresis, but its role is unknown during tolvaptan treatment in ADPKD. METHODS: Eighteen patients with ADPKD received tolvaptan 60 mg or placebo in a randomized, placebo-controlled, double blind, crossover study. L-NMMA (L-NG-monomethyl-arginine) was given as a bolus followed by continuous infusion during 60 min...
August 15, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28796300/apelin-apj-system-a-novel-potential-therapy-target-for-kidney-disease
#6
REVIEW
Zhen Huang, Lele Wu, Linxi Chen
Apelin is an endogenous ligand of seven-transmembrane G protein-coupled receptor APJ. Apelin and APJ are distributed in various tissues, including the heart, lung, kidney, and even in tumor tissues. Studies show that apelin mRNA is highly expressed in the inner stripe of kidney outer medulla, which plays an important role in process of water and sodium balance. Additionally, more studies also indicate that apelin/APJ system exerts a broad range of activities in kidney. Therefore, we review the role of apelin/APJ system in kidney diseases such as renal fibrosis, renal ischemia/reperfusion injury, diabetic nephropathy, polycystic kidney disease and hemodialysis...
August 10, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28752262/discrimination-model-applied-to-urinalysis-of-patients-with-diabetes-and-hypertension-aiming-at-diagnosis-of-chronic-kidney-disease-by-raman-spectroscopy
#7
Elzo Everton de Souza Vieira, Jeyse Aliana Martins Bispo, Landulfo Silveira, Adriana Barrinha Fernandes
Higher blood pressure level and poor glycemic control in diabetic patients are considered progression factors that cause faster decline in kidney functions leading to kidney damage. The present study aimed to develop a quantification model of biomarkers creatinine, urea, and glucose by means of selected peaks of these compounds, measured by Raman spectroscopy, and to estimate the concentration of these analytes in the urine of normal subjects (G_N), diabetic patients with hypertension (G_WOL) patients with chronic renal failure doing dialysis (G_D)...
July 27, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28729970/severe-cyclophosphamide-related-hyponatremia-in-a-patient-with-acute-glomerulonephritis
#8
Pasquale Esposito, Maria Valentina Domenech, Nicoletta Serpieri, Marta Calatroni, Ilaria Massa, Alessandro Avella, Edoardo La Porta, Luca Estienne, Elena Caramella, Teresa Rampino
Cyclophosphamide is frequently used to treat cancer, autoimmune and renal diseases, such as rapidly progressive glomerulonephritis. Its side effects are well-known, including bone marrow depression, infections, alopecia, sterility, bladder malignancy and hemorrhagic cystitis. Moreover, in some cases cyclophosphamide use has been related to the onset of hyponatremia, by development of a syndrome of inappropriate antidiuresis. Indeed, severe hyponatremia has been previously reported in patients treated with high-dose or moderate-dose of intravenous cyclophosphamide, while only few cases have been reported in patients treated with low dose...
July 6, 2017: World Journal of Nephrology
https://www.readbyqxmd.com/read/28720778/visualization-of-kidney-fibrosis-in-diabetic-nephropathy-by-long-diffusion-tensor-imaging-mri-with-spin-echo-sequence
#9
Jun-Ya Kaimori, Yoshitaka Isaka, Masaki Hatanaka, Satoko Yamamoto, Naotsugu Ichimaru, Akihiko Fujikawa, Hiroshi Shibata, Akira Fujimori, Sosuke Miyoshi, Takashi Yokawa, Kagayaki Kuroda, Toshiki Moriyama, Hiromi Rakugi, Shiro Takahara
Renal fibrosis (RF) is an indicator for progression of chronic kidney disease (CKD). Although diabetic nephropathy (DN) is the leading cause of CKD and end-stage renal disease in Western populations, the ability of MRI to evaluate RF in DN patients has not been determined. As a first step to identify possible MRI methods for RF evaluation, we examined the use of diffusion tensor imaging (DTI) MRI to evaluate RF in a rat model of DN (SHR/NDmcr-cp(cp/cp): SHR/ND). The signal-to-noise ratio in DTI MRI was enhanced using a spin-echo sequence, and a special kidney attachment was developed for long-term stabilization...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28644734/high-throughput-phenotypic-screening-of-kinase-inhibitors-to-identify-drug-targets-for-polycystic-kidney-disease
#10
Tijmen H Booij, Hester Bange, Wouter N Leonhard, Kuan Yan, Michiel Fokkelman, Steven J Kunnen, Johannes G Dauwerse, Yu Qin, Bob van de Water, Gerard J P van Westen, Dorien J M Peters, Leo S Price
Polycystic kidney disease (PKD) is a prevalent disorder characterized by renal cysts that lead to kidney failure. Various signaling pathways have been targeted to stop disease progression, but most interventions still focus on alleviating PKD-associated symptoms. The mechanistic complexity of the disease, as well as the lack of functional in vitro assays for compound testing, has made drug discovery for PKD challenging. To identify modulators of PKD, Pkd1(-/-) kidney tubule epithelial cells were applied to a scalable and automated 3D cyst culture model for compound screening, followed by phenotypic profiling to determine compound efficacy...
September 2017: SLAS Discovery
https://www.readbyqxmd.com/read/28614117/role-of-amp-activated-protein-kinase-in-kidney-tubular-transport-metabolism-and-disease
#11
Roshan Rajani, Nuria M Pastor-Soler, Kenneth R Hallows
PURPOSE OF REVIEW: AMP-activated protein kinase (AMPK) is a metabolic sensor that regulates cellular energy balance, transport, growth, inflammation, and survival functions. This review explores recent work in defining the effects of AMPK on various renal tubular epithelial ion transport proteins as well as its role in kidney injury and repair in normal and disease states. RECENT FINDINGS: Recently, several groups have uncovered additional functions of AMPK in the regulation of kidney and transport proteins...
September 2017: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/28577072/regulation-of-renal-na-k-cl-cotransporters-by-vasopressin
#12
REVIEW
Sebastian Bachmann, Kerim Mutig
Vasopressin (AVP) induces antidiuresis, thus playing an essential role in body water and electrolyte homeostasis. Its antidiuretic effects are mediated chiefly by V2 vasopressin receptors (V2R) expressed along the distal nephron and collecting duct epithelia. NaCl reabsorption in the distal nephron, which includes the thick ascending limb (TAL) and distal convoluted tubule (DCT), largely depends on the activity of two structurally related Na-(K)-Cl cotransporters, NKCC2 in TAL and NCC in DCT. AVP-induced activation of these transporters contributes to urine concentration and renal electrolyte reabsorption...
August 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/28533908/ascites-refractory-ascites-and-hyponatremia-in-cirrhosis
#13
Brett Fortune, Andres Cardenas
Ascites is the most common complication related to cirrhosis and is associated with increased morbidity and mortality. Ascites is a consequence of the loss of compensatory mechanisms to maintain the overall effective arterial blood volume due to worsening splanchnic arterial vasodilation as a result of clinically significant portal hypertension. In order to maintain effective arterial blood volume, vasoconstrictor and antinatriuretic pathways are activated, which increase overall sodium and fluid retention...
May 2017: Gastroenterology Report
https://www.readbyqxmd.com/read/28507058/hepatocyte-nuclear-factor-1%C3%AE-regulates-urinary-concentration-and-response-to-hypertonicity
#14
Karam Aboudehen, Lama Noureddine, Patricia Cobo-Stark, Svetlana Avdulov, Shayan Farahani, Micah D Gearhart, Daniel G Bichet, Marco Pontoglio, Vishal Patel, Peter Igarashi
The transcription factor hepatocyte nuclear factor-1β (HNF-1β) is essential for normal kidney development and function. Inactivation of HNF-1β in mouse kidney tubules leads to early-onset cyst formation and postnatal lethality. Here, we used Pkhd1/Cre mice to delete HNF-1β specifically in renal collecting ducts (CDs). CD-specific HNF-1β mutant mice survived long term and developed slowly progressive cystic kidney disease, renal fibrosis, and hydronephrosis. Compared with wild-type littermates, HNF-1β mutant mice exhibited polyuria and polydipsia...
May 15, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28501079/functional-magnetic-resonance-imaging-of-the-kidneys-with-and-without-gadolinium-based-contrast
#15
REVIEW
Jeff L Zhang
Assessment of renal function with magnetic resonance imaging (MRI) has been actively explored in the past decade. In this review, we introduce the principle of MRI and review recent progress of MRI methods (contrast enhanced and noncontrast) in assessing renal function. Contrast-enhanced MRI using ultra-low dose of gadolinium-based agent has been validated for measuring single-kidney glomerular filtration rate and renal plasma flow accurately. For routine functional test, contrast-enhanced MRI may not replace the simple serum-creatinine method...
May 2017: Advances in Chronic Kidney Disease
https://www.readbyqxmd.com/read/28493905/melioidosis-clinical-impact-and-public-health-threat-in-the-tropics
#16
REVIEW
Ramar Perumal Samy, Bradley G Stiles, Gautam Sethi, Lina H K Lim
This review briefly summarizes the geographical distribution and clinical impact of melioidosis, especially in the tropics. Burkholderia pseudomallei (a gram-negative bacterium) is the major causative agent for melioidosis, which is prevalent in Singapore, Malaysia, Thailand, Vietnam, and Northern Australia. Melioidosis patients are increasingly being recognized in other parts of the world. The bacteria are intrinsically resistant to many antimicrobial agents, but prolonged treatment, especially with combinations of antibiotics, may be effective...
May 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28468519/atrasentan-for-the-treatment-of-diabetic-nephropathy
#17
REVIEW
Jesus Egido, Jorge Rojas-Rivera, Sebastian Mas, Marta Ruiz-Ortega, Ana Belen Sanz, Emilio Gonzalez Parra, Carmen Gomez-Guerrero
Endothelin-1 (ET-1) is the most potent vasoconstrictor, and is involved in the renal regulation of salt and water homeostasis. When produced in excess in the kidney, ET-1 promotes proteinuria and tubulointerstitial injury. There is great interest in the clinical use of endothelin receptor antagonists (ERAs) in chronic kidney disease (CKD), mainly in diabetic nephropathy (DN). Areas covered: Physiopathological actions of ET-1 on the kidney. Both dual ETAR/ETBR (bosentan) or ETAR specific endothelin antagonists (avosentan and atrasentan, among others), which have progressed to early clinical development, with particular emphasis on atrasentan...
June 2017: Expert Opinion on Investigational Drugs
https://www.readbyqxmd.com/read/28414662/weil-s-disease-from-a-local-new-orleans-bar
#18
H P Kahn, L Bateman
INTRODUCTION: Leptospirosis is a zoonotic infection that typically presents with fever, myalgias, nausea, and vomiting after contact with contaminated waters or infected animals (typically rodents); and their excrements. Conditions favorable to the transmission of leptospirosis are common in LA and, without treatment, leptospirosis can lead to both liver and renal failure, meningitis, pulmonary hemorrhage and ultimately death. CASE: A 56 year old woman with no past medical history presented to the Emergency Department with weakness, myalgias, jaundice and decreased urine output for one week...
March 2017: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/28397867/oxidative-stress-causes-hypertension-and-activation-of-nuclear-factor-%C3%AE%C2%BAb-after-high-fructose-and-salt-treatments
#19
Waleska C Dornas, Leonardo M Cardoso, Maísa Silva, Natália L S Machado, Deoclécio A Chianca-Jr, Andréia C Alzamora, Wanderson G Lima, Vincent Lagente, Marcelo E Silva
There is evidence that diets rich in salt or simple sugars as fructose are associated with abnormalities in blood pressure regulation. However, the mechanisms underlying pathogenesis of salt- and fructose-induced kidney damage and/or consequent hypertension yet remain largely unexplored. Here, we tested the role of oxidative state as an essential factor along with high salt and fructose treatment in causing hypertension. Fischer male rats were supplemented with a high-fructose diet (20% in water) for 20 weeks and maintained on high-salt diet (8%) associate in the last 10 weeks...
April 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28341273/branched-chain-amino-acids-enhance-cyst-development-in-autosomal-dominant-polycystic-kidney-disease
#20
Junya Yamamoto, Saori Nishio, Fumihiko Hattanda, Daigo Nakazawa, Toru Kimura, Michio Sata, Minoru Makita, Yasunobu Ishikawa, Tatsuya Atsumi
Autosomal dominant polycystic kidney disease (ADPKD) is characterized by the progressive development of kidney and liver cysts. The mammalian target of rapamycin (mTOR) cascade is one of the important pathways regulating cyst growth in ADPKD. Branched-chain amino acids (BCAAs), including leucine, play a crucial role to activate mTOR pathway. Therefore, we administered BCAA dissolved in the drinking water to Pkd1(flox/flox):Mx1-Cre (cystic) mice from four to 22 weeks of age after polyinosinic-polycytidylic acid-induced conditional Pkd1 knockout at two weeks of age...
August 2017: Kidney International
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