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Nephron

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https://www.readbyqxmd.com/read/29132132/care-of-the-acute-kidney-injury-survivor
#1
Ron Wald, Abhijat Kitchlu, Ziv Harel, Samuel A Silver
While the short-term implications of acute kidney injury (AKI) have been known for many years, far less attention has been paid to the health of AKI survivors. This was perhaps fueled by a prevailing wisdom that if a patient was fortunate enough to survive the primary illness associated with AKI, the prognosis for future health was auspicious. More recently, this dogma was challenged by data suggesting that after an episode of AKI, patients remain at risk of experiencing multiple adverse health outcomes. Greater recognition and appreciation of the risks faced by AKI survivors have led to the development of quality improvement initiatives that are supposed to enrich this vulnerable population...
November 13, 2017: Nephron
https://www.readbyqxmd.com/read/29131112/spurious-hyperchloremia-in-the-presence-of-elevated-plasma-salicylate-a-cohort-study
#2
Kianoush B Kashani, Jon H Steuernagle Iv, Qi Qian
BACKGROUND: Acute metabolic acidosis is rarely associated with a reduced or negative anion gap (AG), but several case reports have described such an abnormality occurring in the setting of acute salicylate intoxication. The underlying cause of this phenomenon is unclear. METHODS: In this retrospective cohort study, we reviewed our institutional database to identify all patients admitted for salicylate intoxication at Mayo Clinic (Rochester, MN, USA) from January 2010 through December 2012...
November 9, 2017: Nephron
https://www.readbyqxmd.com/read/29131092/value-of-intraoperative-parathyroid-hormone-assay-during-parathyroidectomy-in-dialysis-and-renal-transplant-patients-with-secondary-and-tertiary-hyperparathyroidism
#3
Amr El-Husseini, Kevin Wang, Annick Edon, David Saxon, Florence Lima, David Sloan, B Peter Sawaya
BACKGROUND: In dialysis and renal transplant patients with secondary and tertiary hyperparathyroidism (HPT), the value of intraoperative parathyroid hormone (ioPTH) during parathyroidectomy (PTX) and its association with long-term PTH levels are unknown. The present study aims at evaluating the relationship of ioPTH with long-term PTH levels post-PTX in dialysis and renal transplant patients in a single-center study. METHODS: The ioPTH was measured in 57 dialysis patients (33 females and 24 males) and 18 renal transplant recipients (12 males and 6 females) who underwent PTX from 2005 to 2015 for refractory HPT...
November 9, 2017: Nephron
https://www.readbyqxmd.com/read/29131073/an-introduction-to-contrast-enhanced-ultrasound-for-nephrologists
#4
Emily H Chang
Contrast-enhanced ultrasound (CEUS) is an emerging technology with no known nephrotoxicity. CEUS has been utilized in cardiac and abdominal imaging for decades in Asia and Europe and has recently received greater attention in the United States with its approval for characterization of indeterminate liver lesions. Emerging data suggest that CEUS has potential as a diagnostic imaging tool among individuals who have contraindications to CT and MRI. Few nephrologists are aware of CEUS and even fewer are aware of its potential applications among individuals with kidney disease...
November 9, 2017: Nephron
https://www.readbyqxmd.com/read/29131054/heritability-of-end-stage-renal-disease-a-swedish-adoption-study
#5
Delshad Saleh Akrawi, MirNabi PirouziFard, Erik Fjellstedt, Jan Sundquist, Kristina Sundquist, Bengt Zöller
BACKGROUND/AIMS: The heritability of end-stage renal disease (ESRD) among adoptees has not been examined so far. By studying adoptees and their biological and adoptive parents, it is possible to differentiate between the genetic causes and environmental causes of familial aggregation. This nationwide study aimed to disentangle the genetic and shared environmental contribution to the familial transmission of ESRD. METHODS: We performed a family study for Swedish-born adoptees (born between 1945 until 1995) and their biological and adoptive parents...
November 9, 2017: Nephron
https://www.readbyqxmd.com/read/29131056/chloride-intracellular-channel-4-overexpression-in-the-proximal-tubules-of-kidneys-from-the-spontaneously-hypertensive-rat-insight-from-proteomic-analysis
#6
Diane Hatziioanou, Georgios Barkas, Elena Critselis, Jerome Zoidakis, Hariklia Gakiopoulou, Maria-Eleni Androutsou, Garyfalia Drossopoulou, Aristidis Charonis, Demetrios V Vlahakos
BACKGROUND: Hypertensive nephropathy, a leading cause of declining kidney function, is a multifactorial process not well understood. In order to elucidate biological processes and identify novel macromolecular components crucially involved in the process of kidney damage, the application of system biology approaches, like proteomics, is required. METHODS: Proteomic studies were performed using the renal parenchyma of spontaneously hypertensive rats (SHR) and their normotensive Wistar Kyoto controls...
November 7, 2017: Nephron
https://www.readbyqxmd.com/read/29131063/changing-paradigms-in-acute-kidney-injury-from-mechanisms-to-management
#7
Ravindra L Mehta, Kelly K Andringa, Paul W Sanders, Anupam Agarwal
No abstract text is available yet for this article.
November 4, 2017: Nephron
https://www.readbyqxmd.com/read/29131116/detection-of-a-splice-site-variant-in-a-patient-with-glomerulopathy-and-fibronectin-deposits
#8
Yurika Tsuji, Kandai Nozu, Tadashi Sofue, Shigeo Hara, Keita Nakanishi, Tomohiko Yamamura, Shogo Minamikawa, Yoshimi Nozu, Hiroshi Kaito, Junya Fujimura, Tomoko Horinouchi, Naoya Morisada, Ichiro Morioka, Mariko Taniguchi-Ikeda, Masafumi Matsuo, Kazumoto Iijima
BACKGROUND/AIMS: Glomerulopathy with fibronectin deposits (GFND; OMIM: 601894) is a very rare inherited kidney disease caused by pathogenic variants in the FN1 gene. Only 9 exonic pathogenic variants in FN1, 9 at the heparin-binding site, and 1 at the integrin-binding site have been reported. No intronic variants in FN1 have been detected. METHODS: We found a pathogenic intronic variant in intron 36 (c.5888-2A>G) located at the heparin-binding site. To determine whether this mutation influences splicing processes, we conducted RT-PCR analysis and an in vitro splicing assay using minigene construction...
November 3, 2017: Nephron
https://www.readbyqxmd.com/read/29131132/points-of-concern-in-post-acute-kidney-injury-management
#9
Jill Vanmassenhove, Raymond Vanholder, Norbert Lameire
The incidence of acute kidney injury (AKI) will in the future remain high, partly due to an increase in comorbidities and other AKI favoring factors such as the rise in high-risk diagnostic and therapeutic interventions. AKI has emerged as a major public health concern with high human and financial costs. It has recently been demonstrated that patients surviving an AKI episode show increased all-cause mortality, chronic kidney disease (CKD), ESRD, cardiovascular events, and reduced quality of life. Although it is important to acknowledge that, after an AKI episode, the risk of dying by far exceeds the risk of developing incident or progressive CKD and/or entering a maintenance renal replacement therapy (RRT) program, currently only a minority of patients are referred for renal follow-up, even after AKI-requiring RRT...
November 2, 2017: Nephron
https://www.readbyqxmd.com/read/29049997/discrepancies-between-perceived-and-measured-cognition-in-kidney-transplant-recipients-implications-for-clinical-management
#10
Aditi Gupta, Tashra S Thomas, Jeffrey A Klein, Robert N Montgomery, Jonathan D Mahnken, David K Johnson, David A Drew, Mark J Sarnak, Jeffrey M Burns
BACKGROUND: Cognitive impairment is common in kidney transplant (KT) recipients and affects quality of life, graft survival, morbidity, and mortality. Failure to identify patients with cognitive impairment can withhold appropriate and timely intervention. This study determines whether measured cognition with standard screening tools offers any advantage over perceived cognition in screening transplant patients for cognitive impairment. METHODS: Cognition was assessed in 157 KT recipients using the Montreal Cognitive Assessment (MoCA; measured cognition)...
October 20, 2017: Nephron
https://www.readbyqxmd.com/read/29050031/reading-first-coordinates-from-the%C3%A2-nephrogenic-zone-in-human-fetal%C3%A2-kidney
#11
Will W Minuth
While substantial information is available on organ anlage and the primary formation of nephrons, molecular mechanisms acting during the late development of the human kidney have received an astonishing lack of attention. In healthy newborn babies, nephrogenesis takes place unnoticed until birth. Upon delivery, morphogenetic activity in the nephrogenic zone decreases, and the stem cell niches aligned beyond the organ capsule vanish by an unknown signal. However, this signal also plays a key role in preterm and low birth weight babies...
October 19, 2017: Nephron
https://www.readbyqxmd.com/read/29050011/urine-ammonium-metabolic-acidosis-and-progression-of-chronic-kidney-disease
#12
Negiin Pourafshar, Shirin Pourafshar, Manoocher Soleimani
The metabolism of a typical Western diet generates 50-100 mEq of acid (H+) per day, which must be excreted in the urine for the systemic acid-base to remain in balance. The 2 major mechanisms that are responsible for the renal elimination of daily acid under normal conditions are ammonium (NH4+) excretion and titratable acidity. In the presence of systemic acidosis, ammonium excretion is intensified and becomes the crucial mechanism for the elimination of acid. The impairment in NH4+ excretion is therefore associated with reduced acid excretion, which causes excess accumulation of acid in the body and consequently results in metabolic acidosis...
October 19, 2017: Nephron
https://www.readbyqxmd.com/read/29017167/hopes-and-difficulties-for-blastocyst-complementation
#13
Benjamin S Freedman
The clinical need for organ replacement therapies has inspired the idea of growing human organs in animal hosts. The injection of human pluripotent stem cells into animal blastocysts provides a possible strategy to accomplish this goal. Subject of Review: A recent study [Wu et al. Cell 2017;168:473-486.e415] tests the feasibility of this approach by creating chimeric embryos between humans and large domestic animals, including pigs and cattle. The study further examines the potential of combining CRISPR-Cas9 gene editing with blastocyst complementation to grow fully foreign organs in chimeric hosts...
October 10, 2017: Nephron
https://www.readbyqxmd.com/read/28988230/urinary-kidney-injury-molecule-1-but-not-urinary-neutrophil-gelatinase-associated-lipocalin-is-increased-after-short-maximal-exercise
#14
Wojciech Wołyniec, Wojciech Ratkowski, Robert Urbański, Maria Bartoszewicz, Danuta Siluk, Zuzanna Wołyniec, Katarzyna Kasprowicz, Katarzyna Zorena, Marcin Renke
BACKGROUND AND AIMS: Urinary neutrophil gelatinase associated lipocalin (uNGAL) and urinary kidney injury molecule-1 (uKIM-1) are markers of acute kidney injury. The albuminuria is a well-known abnormality after physical exercise. The aim of this study was to investigate changes in uNGAL and uKIM-1 after intensive exercise causing albuminuria. METHODS: The study population consisted of 19 participants (10 males and 9 females). The mean age of participants was 35...
October 7, 2017: Nephron
https://www.readbyqxmd.com/read/28988229/studying-kidney-disease-using-tissue-and-genome-engineering-in-human-pluripotent-stem-cells
#15
Elena Garreta, Federico González, Núria Montserrat
Kidney morphogenesis and patterning have been extensively studied in animal models such as the mouse and zebrafish. These seminal studies have been key to define the molecular mechanisms underlying this complex multistep process. Based on this knowledge, the last 3 years have witnessed the development of a cohort of protocols allowing efficient differentiation of human pluripotent stem cells (hPSCs) towards defined kidney progenitor populations using two-dimensional (2D) culture systems or through generating organoids...
October 7, 2017: Nephron
https://www.readbyqxmd.com/read/28965116/new-anti-nephrin-antibody-mediated-podocyte-injury-model-using-a-c57bl-6-mouse-strain
#16
Kazuhiro Takeuchi, Shokichi Naito, Nagako Kawashima, Naoko Ishigaki, Takashi Sano, Kouju Kamata, Yasuo Takeuchi
BACKGROUND: Focal segmental glomerulosclerosis (FSGS) is considered a subset of the podocytopathies. The molecular pathogenesis of podocytopathy is still unknown. There has not been an experimental animal model of isolated podocytopathy induced by antibody in C57BL/6 strain, which is widely used as the genetic background. Nephrin is closely associated with the slit diaphragm of the glomerular podocyte, and has recently received attention as a potential therapeutic target. The function of nephrin, especially its role in FSGS development via podocytopathy, is being elucidated...
September 30, 2017: Nephron
https://www.readbyqxmd.com/read/28926845/leptospirosis-renal-disease-emerging-culprit-of-chronic-kidney-disease-unknown-etiology
#17
Chih-Wei Yang
Leptospirosis is the most prevalent zoonosis affecting more than 1 million populations worldwide. Interestingly, leptospirosis endemic regions coincide with chronic kidney disease (CKD) hotspots largely due to flooding and agricultural overlaps. Acute leptospirosis induces multiple organ dysfunction including acute kidney injury and may predispose to CKD and end-stage renal disease, if not treated timely. Asymptomatic infection may carry the bacteria in the kidney and CKD progresses insidiously. Histologic finding of leptospirosis renal disease includes tubulointerstitial nephritis, interstitial fibrosis, and tubular atrophy...
September 20, 2017: Nephron
https://www.readbyqxmd.com/read/28892806/a-novel-missense-gla-mutation-p-g35v-detected-in-hemodialysis-screening-leads-to-severe-systemic-manifestations-of-fabry-disease-in-men-and-women
#18
Valeria Soares Pigozzi Veloso, Thiago Lacerda Ataides, Maria Eugênia Fernandes Canziani, Mariana Pigozzi Veloso, Nilzio Antônio da Silva, Daniela Veit Barreto, Edna Regina Silva Pereira, Luiz Antonio Ribeiro de Moura, Fellype Carvalho Barreto
BACKGROUND/AIMS: Fabry disease (FD), an X-linked lysosomal storage disorder, leads to accumulation of globotriaosylceramide. Screening in dialysis patients may identify genetic variants of unknown clinical significance. We aimed to characterize the pathogenicity of a novel GLA gene mutation identified during hemodialysis screening and the histologic findings of early Fabry nephropathy. METHODS: One out of 108 male hemodialysis patients screened for FD presented low α-galactosidase A activity...
September 12, 2017: Nephron
https://www.readbyqxmd.com/read/28873373/biomarkers-of-renal-injury-in-cirrhosis-association-with-acute-kidney-injury-and-recovery-after-liver-transplantation
#19
Ashwani K Singal, Bradford Jackson, Glauber B Pereira, Kirk B Russ, Paul Stephen Fitzmorris, Donny Kakati, Page Axley, Sujan Ravi, Toni Seay, Satish P Ramachandra Rao, Ravindra Mehta, Yong-Fang Kuo, Karan P Singh, Anupam Agarwal
BACKGROUND: To define urine or serum biomarkers in predicting renal function recovery after liver transplantation (LT). METHODS: Adults listed for LT (February 2011-July 2014) and with modified diet for renal disease-6 (MDRD-6) <60 mL/min provided urine/blood samples at baseline and serially until LT for biomarkers in serum (pg/mL) and urine (pg/mg creatinine). RESULTS: Of 271 LT listed patients (mean age 57 years, 63% males, median listing MELD 17...
September 2, 2017: Nephron
https://www.readbyqxmd.com/read/28848191/bedside-stereomicroscopy-of-fabry-kidney-biopsies-an-easily-available-method-for-diagnosis-and-assessment-of-sphingolipid-deposits
#20
Einar Svarstad, Sabine Leh, Rannveig Skrunes, Kristin Kampevold Larsen, Øystein Eikrem, Camilla Tøndel
BACKGROUND/AIMS: A previous case report found stereomicroscopic changes typical for Fabry disease in a kidney biopsy. This case series evaluates an expanded diagnostic capacity of the method. METHODS: Bedside stereomicroscopy was performed in a cross-sectional prospective study of 31 consecutive enzyme-treated or treatment-naïve male (n = 14) and female Fabry disease patients. The burden of glomerular storage material was scored semiquantitatively on a visual analog scale (range 0-3) and a blinded comparison was done with a reference histologic method...
August 26, 2017: Nephron
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