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https://www.readbyqxmd.com/read/29330945/cyclosporine-a-induces-endothelin-converting-enzyme-ece-1-studies-in-vivo-and-in-vitro
#1
Samuel N Heyman, Zaid Abassi, Christian Rosenberger, Hiba Yaseen, Galia Skarjinski, Ahuva Shina, Susanne Mathia, Natalia Krits, Mogher Khamaisi
AIM: Cyclosporine A (CsA) induces renal vasoconstriction and hypoxia and enhances the expression of endothelin-1 (ET-1) pro-hormone (pre-pro ET-1), plausibly leading to a feed-forward loop of renal vasoconstriction, hypoxia, and enhanced synthesis of the potent vasoconstrictor ET-1. Endothelin converting enzyme (ECE)-1 cleaves big endothelin to generate endothelin (ET)-1 and is up-regulated by hypoxia via hypoxia-inducible factor (HIF). We hypothesized that in addition to the direct induction of ET-1 synthesis, CsA might also intensify renal ECE-1expression, thus contributing to enhanced ET-1 synthesis following CsA...
January 13, 2018: Acta Physiologica
https://www.readbyqxmd.com/read/29329932/development-of-the-human-fetal-kidney-from-mid-to-late-gestation-in-male-and-female-infants
#2
Danica Ryan, Megan R Sutherland, Tracey J Flores, Alison L Kent, Jane E Dahlstrom, Victor G Puelles, John F Bertram, Andrew P McMahon, Melissa H Little, Lynette Moore, Mary Jane Black
BACKGROUND: During normal human kidney development, nephrogenesis (the formation of nephrons) is complete by term birth, with the majority of nephrons formed late in gestation. The aim of this study was to morphologically examine nephrogenesis in fetal human kidneys from 20 to 41weeks of gestation. METHODS: Kidney samples were obtained at autopsy from 71 infants that died acutely in utero or within 24h after birth. Using image analysis, nephrogenic zone width, the number of glomerular generations, renal corpuscle cross-sectional area and the cellular composition of glomeruli were examined...
December 20, 2017: EBioMedicine
https://www.readbyqxmd.com/read/29327197/-new-kidney-function-tests-renal-functional-reserve-and-furosemide-stress-test
#3
REVIEW
D Kindgen-Milles, T Slowinski, T Dimski
Acute kidney injury (AKI) occurs in 30-50% of all intensive care patients. Renal replacement therapy (RRT) has to be initiated in 10-15%. The early in-hospital mortality is about 50%. Up to 20% of all survivors develop chronic kidney disease after intensive care discharge and progress to end-stage kidney disease within the next 10 years. For timely initiation of prophylactic or therapeutic interventions, it is crucial to exactly determine the actual kidney function, i. e., glomerular filtration rate (GFR), and to gain insight into the further development of kidney function...
January 11, 2018: Medizinische Klinik, Intensivmedizin und Notfallmedizin
https://www.readbyqxmd.com/read/29318365/-innovations-in-surgical-treatment-of-pediatric-solid-tumors
#4
REVIEW
A Schmidt, S W Warmann, C Urla, J Fuchs
The overall survival of children with solid tumors has shown a substantial increase in the past decades due to progress in all of the disciplines involved in the treatment. The poor prognosis for advanced stages of disease and the morbidity related to therapeutic procedures are still a challenge. Innovations in the surgical treatment of solid tumors can contribute to increase the survival rate of affected children and to decrease the treatment-related morbidity. Considering these aspects, the successful implementation of innovations is described based on four examples...
January 9, 2018: Der Chirurg; Zeitschrift Für Alle Gebiete der Operativen Medizen
https://www.readbyqxmd.com/read/29318217/anticancer-drug-induced-acute-kidney-injury
#5
REVIEW
Hassan Izzedine, Mark A Perazella
Acute kidney injury (AKI) is a growing problem with untoward economic and medical consequences. Anticancer drug toxicity remains an important and increasing cause of AKI. Importantly, drug-induced AKI affects all nephron segments-vasculature, glomerulus, tubules, and interstitium. Recent studies have increased insight into the subcellular mechanisms of drug-induced AKI that include direct cellular toxicity and immune-mediated effects. Identification of patients with high-risk cancer before drug exposure may allow prevention or at least a reduction in the development and severity of nephrotoxicity...
July 2017: KI Reports
https://www.readbyqxmd.com/read/29317497/identification-of-direct-negative-crosstalk-between-the-slit2-and-bone-morphogenetic-protein-gremlin-signaling-pathways
#6
Kathleen E Tumelty, Nathan Higginson-Scott, Xueping Fan, Piyush Bajaj, Kelly M Knowlton, Michael Shamashkin, Anthony J Coyle, Weining Lu, Stephen P Berasi
Slit guidance ligand 2 (SLIT2) is a large, secreted protein which binds roundabout (ROBO) receptors on multiple cell types including neurons and kidney podocytes. SLIT2-ROBO2 mediated signaling regulates neuronal migration and ureteric bud (UB) outgrowth during kidney development as well as glomerular filtration in adult kidneys. Additionally, SLIT2 binds Gremlin, an antagonist of bone morphogenetic proteins (BMPs), and BMP-Gremlin signaling also regulates UB formation. However, direct crosstalk between the ROBO2-SLIT2 and BMP-Gremlin signaling pathways has not been established...
January 9, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29317010/a-new-model-for-fetal-programming-maternal-ramadan-type-fasting-programs-nephrogenesis
#7
M Mohany, N Ashton, A H Harrath, J R Nyengaard, S Y Alomar, S Alwasel
The effect of maternal Ramadan-type fasting (RTF) on the outcome of pregnancy, kidney development and nephron number in male rat offspring was investigated in current study. Pregnant rats were given food and water ad libitum during pregnancy (control) or restricted for 16 h per day (RTF). Kidney structure was examined during fetal life, at birth, and in early and late adulthood. Maternal body weight, food intake, relative food intake and plasma glucose levels were significantly lower (P<0.001) in the RTF group...
January 10, 2018: Journal of Developmental Origins of Health and Disease
https://www.readbyqxmd.com/read/29315096/evaluation-and-management-of-a-large-incidentally-discovered-renal-mass
#8
Brenda L Quincy, Lori Fauquher
Increasingly, renal cell cancer is diagnosed because of an incidental finding of a renal mass on an imaging study. Incidentally discovered masses are more likely to be small and, if malignant, represent localized renal cell cancer. The imaging features of the tumor and patient characteristics inform the management options, which favor a nephron-sparing approach over radical nephrectomy. Clinical stage at the time of diagnosis has important prognostic implications for the patient. This article reviews the presentation, diagnostic evaluation, and management of an incidentally discovered renal mass...
January 8, 2018: JAAPA: Official Journal of the American Academy of Physician Assistants
https://www.readbyqxmd.com/read/29309300/reappraisal-of-morphologic-differences-between-renal-medullary-carcinoma-collecting-duct-carcinoma-and-fumarate-hydratase-deficient-renal-cell-carcinoma
#9
Chisato Ohe, Steven C Smith, Deepika Sirohi, Mukul Divatia, Mariza de Peralta-Venturina, Gladell P Paner, Abbas Agaimy, Mitual B Amin, Pedram Argani, Ying-Bei Chen, Liang Cheng, Maurizio Colecchia, Eva Compérat, Isabela Werneck da Cunha, Jonathan I Epstein, Anthony J Gill, Ondřej Hes, Michelle S Hirsch, Wolfram Jochum, Lakshmi P Kunju, Fiona Maclean, Cristina Magi-Galluzzi, Jesse K McKenney, Rohit Mehra, Gabriella Nesi, Adeboye O Osunkoya, Maria M Picken, Priya Rao, Victor E Reuter, Paulo Guilherme de Oliveira Salles, Luciana Schultz, Satish K Tickoo, Scott A Tomlins, Kiril Trpkov, Mahul B Amin
Renal medullary carcinomas (RMCs) and collecting duct carcinomas (CDCs) are rare subsets of lethal high-stage, high-grade distal nephron-related adenocarcinomas with a predilection for the renal medullary region. Recent findings have established an emerging group of fumarate hydratase (FH)-deficient tumors related to hereditary leiomyomatosis and renal cell carcinoma (HLRCC-RCCs) syndrome within this morphologic spectrum. Recently developed, reliable ancillary testing has enabled consistent separation between these tumor types...
January 5, 2018: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/29302738/comparison-between-the-diagnostic-accuracies-of-18f-fluorodeoxyglucose-positron-emission-tomography-computed-tomography-and-conventional-imaging-in-recurrent-urothelial-carcinomas-a-retrospective-multicenter-study
#10
Fabio Zattoni, Elena Incerti, Michele Colicchia, Paolo Castellucci, Stefano Panareo, Maria Picchio, Federico Fallanca, Alberto Briganti, Marco Moschini, Andrea Gallina, Jeffrey R Karnes, Val Lowe, Stefano Fanti, Riccardo Schiavina, Ilaria Rambaldi, Vincenzo Ficarra, Laura Evangelista
PURPOSE: To determine the performance accuracy of 18F-fluorodeoxyglucose positron emission tomography/computed tomography (FDG PET/CT) after primary tumor treatment for both bladder cancer (BC) and upper tract urothelial cancer (UTUC). To compare the accuracy of FDG PET/CT with that of contrast-enhanced-ceCT and magnetic resonance imaging (MRI). METHODS: Data of patients with recurrent urothelial carcinomas (UC) after primary treatment were collected in a retrospective, international multicenter study...
January 4, 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/29289517/-dietary-acid-load-a-novel-target-for-the-nephrologist
#11
Philippe Chauveau, Catherine Lasseur, Céline Nodimar, Mathilde Prezelin-Reydit, Stanislas Trolonge, Christian Combe, Michel Aparicio
The acid production of endogenous origin depends mainly on the metabolism of the food and varies with the nature of these. Of the order of 1mEq/kg/day for contemporary food in industrialized countries, it is reduced by more than one third among vegetarians and close to neutrality among vegans. The dietary acid load is eliminated by the normal kidneys, thus maintaining the acid-base equilibrium. In the setting of CKD, it will overflow the capacities of the nephrons, generating a retention of H+ ions, promoting subclinical acidosis...
December 27, 2017: Néphrologie & Thérapeutique
https://www.readbyqxmd.com/read/29288189/the-renal-parenchyma-evaluation-of-a-novel-ultrasound-measurement-to-assess-fetal-renal-development-protocol-for-an-observational-longitudinal-study
#12
Sonja Brennan, Michal Schneider, David Watson, Yogavijayan Kandasamy, Donna Rudd
INTRODUCTION: Disorders of fetal growth, such as intrauterine growth restriction (IUGR) and large for gestational age (LGA), have been found to have a profound effect on the development of the fetal kidney. Abnormal kidney development is associated with hypertension and chronic kidney disease later in life. This study will use a novel ultrasound measurement to assess the renal parenchymal growth and kidney arterial blood flow in the fetus to evaluate the development of the fetal kidneys and provide an indirect estimate of nephron number...
December 28, 2017: BMJ Open
https://www.readbyqxmd.com/read/29285423/renal-intercalated-cells-and-blood-pressure-regulation
#13
REVIEW
Susan M Wall
Type B and non-A, non-B intercalated cells are found within the connecting tubule and the cortical collecting duct. Of these cell types, type B intercalated cells are known to mediate Cl- absorption and HCO3- secretion largely through pendrin-dependent Cl-/HCO3- exchange. This exchange is stimulated by angiotensin II administration and is also stimulated in models of metabolic alkalosis, for instance after aldosterone or NaHCO3 administration. In some rodent models, pendrin-mediated HCO3- secretion modulates acid-base balance...
December 2017: Kidney Research and Clinical Practice
https://www.readbyqxmd.com/read/29282868/epigenetic-changes-mediating-transition-to-chronic-kidney-disease-hypoxic-memory
#14
EDITORIAL
Tetsuhiro Tanaka
Underlying mechanisms accounting for the transition of AKI to CKD have been eagerly sought. Candidates so far include nephron loss, inflammation, endothelial injury with vascular rarefaction and cell cycle arrest in epithelial cells. Among them, hypoxia is increasingly recognized as a common pathway mediating transition from AKI to CKD 2 . This article is protected by copyright. All rights reserved.
December 28, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/29281864/long-term-effects-of-neonatal-hyperoxia-in-adult-mice
#15
Vasantha Hs Kumar, Huamei Wang, Sergei Kishkurno, Babu S Paturi, Lori Nielsen, Rita M Ryan
BACKGROUND: The outcomes of premature infants have improved greatly, however the health risks in adulthood are still relatively unclear. Bronchopulmonary dysplasia (BPD) in premature infants is a major risk factor producing alteration in lung function and predisposition to later respiratory morbidity, and is associated with hyperoxia. This study explores the effect of neonatal hyperoxia on organ systems in adult mice. METHODS: Newborn mouse litters were randomized to 85%O2 or room air (RA) on P3 for 12 days; mice were sacrificed at P3, P7, P15, 3 months and 9 months...
December 27, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29279872/massive-dilation-of-the-ureter-an-endoscopic-management-of-persistent-urinary-leak-after-partial-nephrectomy
#16
Panagiotis Pardalidis, Nick Andriopoulos, Eleni Kosmaoglou, Nick Pardalidis
Introduction: The incidence of urinary leakage is increased as nephron sparing surgery becomes more used for the management of small renal masses. We present an endourologic approach in a patient with a persistent urinary leak after partial nephrectomy by placing two synchronous ureteral stents to improve drainage and avoid further potential surgery. Patients and Method: A 39-year-old patient presented with a urine leak on the fifth postoperative day after an open partial nephrectomy. Initially, the leakage was managed with a placement of a 6F Double-J stent...
2017: Journal of Endourology Case Reports
https://www.readbyqxmd.com/read/29279420/deregulated-profiles-of-urinary-micrornas-may-explain-podocyte-injury-and-proximal-tubule-dysfunction-in-normoalbuminuric-patients-with-type-2-diabetes-mellitus
#17
Oana Milas, Florica Gadalean, Adrian Vlad, Victor Dumitrascu, Cristina Gluhovschi, Gheorghe Gluhovschi, Silvia Velciov, Roxana Popescu, Flaviu Bob, Petru Matusz, Agneta-Maria Pusztai, Octavian M Cretu, Alina Secara, Anca Simulescu, Sorin Ursoniu, Daliborca Vlad, Ligia Petrica
MicroRNAs (miRNAs) are short non-coding RNA species that are important post-transcriptional regulators of gene expression. The aim of the study was to establish a potential explanation of podocyte damage and proximal tubule (PT) dysfunction induced by deregulated miRNAs expression in the course of type 2 diabetes mellitus (DM). A total of 68 patients with type 2 DM and 11 healthy subjects were enrolled in a cross-sectional study and assessed concerning urinary albumin:creatinine ratio (UACR), urinary N-acetyl-β-D-glucosamininidase (NAG), urinary kidney injury molecule-1, urinary nephrin, podocalyxin, synaptopodin, estimated glomerular filtration rate (eGFR), urinary miRNA21, miRNA124, and miRNA192...
December 25, 2017: Journal of Investigative Medicine: the Official Publication of the American Federation for Clinical Research
https://www.readbyqxmd.com/read/29277887/the-safety-and-efficacy-of-adjuvant-hemostatic-agents-during-laparoscopic-nephron-sparing-surgery-comparison-of-tachosil-and-floseal-versus-no-hemostatic-agents
#18
Senol Tonyali, Artan Koni, Sertac Yazici, Cenk Y Bilen
PURPOSE: To compare the effectiveness of TachoSil and Floseal during laparoscopic nephron-sparing surgery (LNSS), and to evaluate postoperative complications, especially hemorrhage and urinary leakage. MATERIALS AND METHODS: The medical records of all patients that underwent LNSS for a small renal mass (SRM) performed by the same experienced surgeon were retrospectively analyzed. The patients were divided into the following 3 groups, based on hemostatic agent: group 1: no adjuvant hemostatic agent (no AHA); group 2: TachoSil; group 3: Floseal...
December 26, 2017: Urology Journal
https://www.readbyqxmd.com/read/29273971/stereological-study-of-developing-glomerular-forms-during-human-fetal-kidney-development
#19
Marija Dakovic Bjelakovic, Slobodan Vlajkovic, Aleksandar Petrovic, Marko Bjelakovic, Milorad Antic
BACKGROUND: Human fetal kidney development is a complex and stepwise process. The number, shape, size and distribution of glomeruli provide important information on kidney organization. The aim of this study was to quantify glomerular developing forms during human fetal kidney development using stereological methods. METHODS: Kidney tissue specimens of 40 human fetuses with gestational ages ranging from 9 to 40 weeks were analyzed. Specimens were divided into eight groups based on gestational age, each corresponding to 1 lunar month...
December 23, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/29251736/pge2-ep1-receptor-inhibits-vasopressin-dependent-water-reabsorption-and-sodium-transport-in-mouse-collecting-duct
#20
Rania Nasrallah, Joseph Zimpelmann, David Eckert, Jamie Ghossein, Sean Geddes, Jean-Claude Beique, Jean-Francois Thibodeau, Chris R J Kennedy, Kevin D Burns, Richard L Hébert
PGE2 regulates glomerular hemodynamics, renin secretion, and tubular transport. This study examined the contribution of PGE2 EP1 receptors to sodium and water homeostasis. Male EP1-/- mice were bred with hypertensive TTRhRen mice (Htn) to evaluate blood pressure and kidney function at 8 weeks of age in four groups: wildtype (WT), EP1-/-, Htn, HtnEP1-/-. Blood pressure and water balance were unaffected by EP1 deletion. COX1 and mPGE2 synthase were increased and COX2 was decreased in mice lacking EP1, with increases in EP3 and reductions in EP2 and EP4 mRNA throughout the nephron...
December 18, 2017: Laboratory Investigation; a Journal of Technical Methods and Pathology
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