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Journal of the American Society of Nephrology: JASN

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https://www.readbyqxmd.com/read/28630231/understanding-medication-nonadherence-after-kidney-transplant
#1
Thomas E Nevins, Peter W Nickerson, Mary Amanda Dew
Alloimmunity remains a barrier to long-term graft survival that necessitates lifelong immunosuppressive therapy after renal transplant. Medication nonadherence has been increasingly recognized as a major impediment to achieving effective immunosuppression. Electronic medication monitoring further reveals that nonadherence manifests early after transplant, although the effect is delayed. The etiology of nonadherence is multifactorial, with the strongest risk factors including past nonadherence and being an adolescent or young adult...
June 19, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28630230/urine-ammonium-and-preclinical-acidosis-in-ckd
#2
EDITORIAL
Thomas D DuBose
No abstract text is available yet for this article.
June 19, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28620082/turning-the-tide-improving-fluid-management-in-dialysis-through-technology
#3
EDITORIAL
Jennifer E Flythe
No abstract text is available yet for this article.
June 15, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28620081/re-examining-neutrophil-participation-in-gn
#4
Dawn J Caster, David W Powell, Irina Miralda, Richard A Ward, Kenneth R McLeish
Significant advances in understanding the pathogenesis of GN have occurred in recent decades. Among those advances is the finding that both innate and adaptive immune cells contribute to the development of GN. Neutrophils were recognized as key contributors in early animal models of GN, at a time when the prevailing view considered neutrophils to function as nonspecific effector cells that die quickly after performing antimicrobial functions. However, advances over the past two decades have shown that neutrophil functions are more complex and sophisticated...
June 15, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28620080/the-sorting-nexin-3-retromer-pathway-regulates-the-cell-surface-localization-and-activity-of-a-wnt-activated-polycystin-channel-complex
#5
Shuang Feng, Andrew J Streets, Vasyl Nesin, Uyen Tran, Hongguang Nie, Marta Onopiuk, Oliver Wessely, Leonidas Tsiokas, Albert C M Ong
Autosomal dominant polycystic kidney disease (ADPKD) is caused by inactivating mutations in PKD1 (85%) or PKD2 (15%). The ADPKD proteins encoded by these genes, polycystin-1 (PC1) and polycystin-2 (PC2), form a plasma membrane receptor-ion channel complex. However, the mechanisms controlling the subcellular localization of PC1 and PC2 are poorly understood. Here, we investigated the involvement of the retromer complex, an ancient protein module initially discovered in yeast that regulates the retrieval, sorting, and retrograde transport of membrane receptors...
June 15, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28600471/asymmetric-dimethylarginine-contributes-to-the-impaired-response-to-erythropoietin-in-ckd-anemia
#6
Miyuki Yokoro, Yosuke Nakayama, Sho-Ichi Yamagishi, Ryotaro Ando, Miki Sugiyama, Sakuya Ito, Junko Yano, Kensei Taguchi, Yusuke Kaida, Daisuke Saigusa, Masumi Kimoto, Takaaki Abe, Seiji Ueda, Kei Fukami
Erythropoietin-resistant anemia is associated with adverse cardiovascular events in patients with ESRD, but the underlying mechanism remains unclear. Here, we evaluated the role of the endogenous nitric oxide synthase inhibitor asymmetric dimethylarginine (ADMA). In 54 patients with advanced CKD, erythrocyte but not plasma ADMA levels independently associated with low hemoglobin values, although levels of both types of ADMA were elevated compared with those in healthy volunteers. Furthermore, erythrocyte ADMA level associated with the erythropoietin resistance index in patients receiving a weekly injected dose of erythropoiesis-stimulating agents standardized for hemoglobin levels and body weight, whereas it correlated with the erythropoietin demand index (plasma erythropoietin units divided by the hemoglobin value) in patients not receiving erythropoiesis-stimulating agents...
June 9, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28592425/targeting-plasma-cells-with-proteasome-inhibitors-principles-from-primates
#7
EDITORIAL
E Steve Woodle, Simon Tremblay, James Driscoll
No abstract text is available yet for this article.
June 7, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28592424/uromodulin-in-the-bloodstream-old-wine-in-a-new-wineskin
#8
EDITORIAL
Daniel Kraus, Christoph Wanner
No abstract text is available yet for this article.
June 7, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28592423/remission-of-hematuria-improves-renal-survival-in-iga-nephropathy
#9
Angel M Sevillano, Eduardo Gutiérrez, Claudia Yuste, Teresa Cavero, Evangelina Mérida, Paola Rodríguez, Ana García, Enrique Morales, Cristina Fernández, Miguel Angel Martínez, Juan Antonio Moreno, Manuel Praga
Hematuria is a cardinal symptom in IgA nephropathy, but its influence on the risk of disease progression has been scarcely investigated. We followed a cohort of 112 patients with IgA nephropathy for a mean±SEM period of 14±10.2 years, during which clinical and analytic risk factors (including urine sediment examination) were regularly recorded. According to the magnitude of time-averaged hematuria, we classified patients as those with persistent hematuria and those with negative or minimal hematuria. We also classified patients according to the magnitude of time-averaged proteinuria (>0...
June 7, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28592422/association-of-sex-with-risk-of-kidney-graft-failure-differs-by-age
#10
Fanny Lepeytre, Mourad Dahhou, Xun Zhang, Julie Boucquemont, Ruth Sapir-Pichhadze, Heloise Cardinal, Bethany J Foster
Prior studies of sex differences in kidney graft survival showed conflicting results. We hypothesized that the association between recipient sex and kidney graft failure risk differs by recipient age and donor sex. We evaluated 159,417 patients recorded in the Scientific Registry of Transplant Recipients database who received a first deceased-donor kidney transplant (1995-2013). We used time-varying Cox models to estimate the association between recipient sex and death-censored graft failure. Models, stratified on donor sex and adjusted for potential confounders, included a recipient sex by current age interaction term...
June 7, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28583916/balancing-anticoagulation-decisions-in-patients-on-dialysis-with-atrial-fibrillation
#11
EDITORIAL
Eli N Deal, Jerrica E Shuster
No abstract text is available yet for this article.
June 5, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28583915/elabela-and-an-elabela-fragment-protect-against-aki
#12
Hong Chen, Lin Wang, Wenjun Wang, Cheng Cheng, Yu Zhang, Yu Zhou, Congyi Wang, Xiaoping Miao, Jiao Wang, Chao Wang, Jianshuang Li, Ling Zheng, Kun Huang
Renal ischemia-reperfusion (I/R) injury is the most common cause of AKI, which associates with high mortality and has no effective therapy. ELABELA (ELA) is a newly identified 32-residue hormone peptide highly expressed in adult kidney. To investigate whether ELA has protective effects on renal I/R injury, we administered the mature peptide (ELA32) or the 11-residue furin-cleaved fragment (ELA11) to hypoxia-reperfusion (H/R)-injured or adriamycin-treated renal tubular cells in vitro ELA32 and ELA11 significantly inhibited the elevation of the DNA damage response, apoptosis, and inflammation in H/R-injured renal tubular cells and suppressed adriamycin-induced DNA damage response...
June 5, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28566480/autoantibodies-against-c-reactive-protein-influence-complement-activation-and-clinical-course-in-lupus-nephritis
#13
Qiu-Yu Li, Hai-Yun Li, Ge Fu, Feng Yu, Yi Wu, Ming-Hui Zhao
Autoantibodies against the major acute-phase reactant C-reactive protein (CRP) are frequently found in patients with lupus nephritis. Further defining the autoimmune epitopes on CRP may not only improve patient stratification but also, hint at mechanisms of CRP action. Herein, we show that amino acids 35-47 constitute the major epitope recognized by anti-CRP autoantibodies in patients with lupus nephritis. Notably, the presence of autoantibodies against amino acids 35-47 associated with more severe renal damage and predicted worse outcome...
May 31, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28566479/targeted-exome-sequencing-identifies-pbx1-as-involved-in-monogenic-congenital-anomalies-of-the-kidney-and-urinary-tract
#14
Laurence Heidet, Vincent Morinière, Charline Henry, Lara De Tomasi, Madeline Louise Reilly, Camille Humbert, Olivier Alibeu, Cécile Fourrage, Christine Bole-Feysot, Patrick Nitschké, Frédéric Tores, Marc Bras, Marc Jeanpierre, Christine Pietrement, Dominique Gaillard, Marie Gonzales, Robert Novo, Elise Schaefer, Joëlle Roume, Jelena Martinovic, Valérie Malan, Rémi Salomon, Sophie Saunier, Corinne Antignac, Cécile Jeanpierre
Congenital anomalies of the kidney and urinary tract (CAKUT) occur in three to six of 1000 live births, represent about 20% of the prenatally detected anomalies, and constitute the main cause of CKD in children. These disorders are phenotypically and genetically heterogeneous. Monogenic causes of CAKUT in humans and mice have been identified. However, despite high-throughput sequencing studies, the cause of the disease remains unknown in most patients, and several studies support more complex inheritance and the role of environmental factors and/or epigenetics in the pathophysiology of CAKUT...
May 31, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28566478/ilc2-there-s-a-new-cell-in-town
#15
EDITORIAL
Yuan Min Wang, Mahnoor Bakhtiar, Stephen I Alexander
No abstract text is available yet for this article.
May 31, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28566477/long-term-outcome-of-steroid-resistant-nephrotic-syndrome-in-children
#16
Agnes Trautmann, Sven Schnaidt, Beata S Lipska-Ziętkiewicz, Monica Bodria, Fatih Ozaltin, Francesco Emma, Ali Anarat, Anette Melk, Marta Azocar, Jun Oh, Bassam Saeed, Alaleh Gheisari, Salim Caliskan, Jutta Gellermann, Lina Maria Serna Higuita, Augustina Jankauskiene, Dorota Drozdz, Sevgi Mir, Ayse Balat, Maria Szczepanska, Dusan Paripovic, Alexandra Zurowska, Radovan Bogdanovic, Alev Yilmaz, Bruno Ranchin, Esra Baskin, Ozlem Erdogan, Giuseppe Remuzzi, Agnieszka Firszt-Adamczyk, Elzbieta Kuzma-Mroczkowska, Mieczyslaw Litwin, Luisa Murer, Marcin Tkaczyk, Helena Jardim, Anna Wasilewska, Nikoleta Printza, Kibriya Fidan, Eva Simkova, Halina Borzecka, Hagen Staude, Katharina Hees, Franz Schaefer
We investigated the value of genetic, histopathologic, and early treatment response information in prognosing long-term renal outcome in children with primary steroid-resistant nephrotic syndrome. From the PodoNet Registry, we obtained longitudinal clinical information for 1354 patients (disease onset at >3 months and <20 years of age): 612 had documented responsiveness to intensified immunosuppression (IIS), 1155 had kidney biopsy results, and 212 had an established genetic diagnosis. We assessed risk factors for ESRD using multivariate Cox regression models...
May 31, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28539383/glomerulosclerosis-induced-by-deficiency-of-membrane-associated-guanylate-kinase-inverted-2-in-kidney-podocytes
#17
Naritoshi Shirata, Kan-Ichiro Ihara, Kanae Yamamoto-Nonaka, Takuto Seki, Shin-Ichi Makino, Juan Alejandro Oliva Trejo, Takafumi Miyake, Hiroyuki Yamada, Kirk Nicholas Campbell, Takahiko Nakagawa, Kiyoshi Mori, Motoko Yanagita, Peter Mundel, Katsuhiko Nishimori, Katsuhiko Asanuma
Membrane-associated guanylate kinase inverted 2 (MAGI-2) is a component of the slit diaphragm (SD) of glomerular podocytes. Here, we investigated the podocyte-specific function of MAGI-2 using newly generated podocyte-specific MAGI-2-knockout (MAGI-2-KO) mice. Compared with podocytes from wild-type mice, podocytes from MAGI-2-KO mice exhibited SD disruption, morphologic abnormalities of foot processes, and podocyte apoptosis leading to podocyte loss. These pathologic changes manifested as massive albuminuria by 8 weeks of age and glomerulosclerosis and significantly higher plasma creatinine levels at 12 weeks of age; all MAGI-2-KO mice died by 20 weeks of age...
May 24, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28539382/il233-a-novel-il-2-and-il-33-hybrid-cytokine-ameliorates-renal-injury
#18
Marta E Stremska, Sheethal Jose, Vikram Sabapathy, Liping Huang, Amandeep Bajwa, Gilbert R Kinsey, Poonam R Sharma, Saleh Mohammad, Diane L Rosin, Mark D Okusa, Rahul Sharma
CD4(+)Foxp3(+) regulatory T cells (Tregs) protect the kidney during AKI. We previously found that IL-2, which is critical for Treg homeostasis, upregulates the IL-33 receptor (ST2) on CD4(+) T cells, thus we hypothesized that IL-2 and IL-33 cooperate to enhance Treg function. We found that a major subset of Tregs in mice express ST2, and coinjection of IL-2 and IL-33 increased the number of Tregs in lymphoid organs and protected mice from ischemia-reperfusion injury (IRI) more efficiently than either cytokine alone...
May 24, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28526779/the-phenotypic-spectrum-of-nephropathies-associated-with-mutations-in-diacylglycerol-kinase-%C3%AE%C2%B5
#19
Karolis Azukaitis, Eva Simkova, Mohammad Abdul Majid, Matthias Galiano, Kerstin Benz, Kerstin Amann, Clemens Bockmeyer, Radha Gajjar, Kevin E Meyers, Hae Il Cheong, Bärbel Lange-Sperandio, Therese Jungraithmayr, Véronique Frémeaux-Bacchi, Carsten Bergmann, Csaba Bereczki, Monika Miklaszewska, Dorottya Csuka, Zoltán Prohászka, Patrick Gipson, Matthew G Sampson, Mathieu Lemaire, Franz Schaefer
The recent discovery of mutations in the gene encoding diacylglycerol kinase ε (DGKE) identified a novel pathophysiologic mechanism leading to HUS and/or MPGN. We report ten new patients from eight unrelated kindreds with DGKE nephropathy. We combined these cases with all previously published cases to characterize the phenotypic spectrum and outcomes of this new disease entity. Most patients presented with HUS accompanied by proteinuria, whereas a subset of patients exhibited clinical and histologic patterns of MPGN without TMA...
May 19, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28522688/polycystic-kidney-disease-without-an-apparent-family-history
#20
Ioan-Andrei Iliuta, Vinusha Kalatharan, Kairong Wang, Emilie Cornec-Le Gall, John Conklin, Marina Pourafkari, Ryan Ting, Chen Chen, Alessia C Borgo, Ning He, Xuewen Song, Christina M Heyer, Sarah R Senum, Young-Hwan Hwang, Andrew D Paterson, Peter C Harris, Korosh Khalili, York Pei
The absence of a positive family history (PFH) in 10%-25% of patients poses a diagnostic challenge for autosomal dominant polycystic kidney disease (ADPKD). In the Toronto Genetic Epidemiology Study of Polycystic Kidney Disease, 210 affected probands underwent renal function testing, abdominal imaging, and comprehensive PKD1 and PKD2 mutation screening. From this cohort, we reviewed all patients with and without an apparent family history, examined their parental medical records, and performed renal imaging in all available parents of unknown disease status...
May 18, 2017: Journal of the American Society of Nephrology: JASN
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