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Kidney International

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https://www.readbyqxmd.com/read/28545716/connective-tissue-growth-factor-regulates-fibrosis-associated-renal-lymphangiogenesis
#1
Hiroshi Kinashi, Lucas L Falke, Tri Q Nguyen, Niels Bovenschen, Jan Aten, Andrew Leask, Yasuhiko Ito, Roel Goldschmeding
Lymphangiogenesis is correlated with the degree of renal interstitial fibrosis. Pro-fibrotic transforming growth factor β induces VEGF-C production, the main driver of lymphangiogenesis. Connective tissue growth factor (CTGF) is an important determinant of fibrotic tissue remodeling, but its possible involvement in lymphangiogenesis has not been explored. We found prominent lymphangiogenesis during tubulointerstitial fibrosis to be associated with increased expression of CTGF and VEGF-C in human obstructed nephropathy as well as in diabetic kidney disease...
May 23, 2017: Kidney International
https://www.readbyqxmd.com/read/28545715/apol1-genetic-variants-are-not-associated-with-longitudinal-blood-pressure-in-young-black-adults
#2
Teresa K Chen, Michelle M Estrella, Eric Vittinghoff, Feng Lin, Orlando M Gutierrez, Holly Kramer, Cora E Lewis, Jeffrey B Kopp, Norrina B Allen, Cheryl A Winkler, Kirsten B Bibbins-Domingo, Carmen A Peralta
Whether APOL1 polymorphisms contribute to the excess risk of hypertension among blacks is unknown. To assess this we evaluated whether self-reported race and, in blacks, APOL1 risk variants (high-risk [2 risk alleles] versus low-risk [0-1 risk allele]) were associated with longitudinal blood pressure. Blood pressure trajectories were determined using linear mixed-effects (slope) and latent class models (5 distinct groups) during 25 years of follow-up in the Coronary Artery Risk Development in Young Adults Study...
May 23, 2017: Kidney International
https://www.readbyqxmd.com/read/28545714/anticystogenic-activity-of-a-small-molecule-pak4-inhibitor-may-be-a-novel-treatment-for-autosomal-dominant-polycystic-kidney-disease
#3
Vicki J Hwang, Xia Zhou, Xiaonan Chen, Josephine Trott, Omran Abu Aboud, Kyuhwan Shim, Lai Kuan Dionne, Kenneth J Chmiel, William Senapedis, Erkan Baloglu, Moe R Mahjoub, Xiaogang Li, Robert H Weiss
Autosomal Dominant Polycystic Kidney Disease (ADPKD) is a common hereditary renal disease with no currently available targeted therapies. Based on the established connection between β-catenin signaling and renal ciliopathies, and on data from our and other laboratories showing striking similarities of this disease and cancer, we evaluated the use of an orally bioavailable small molecule, KPT-9274 (a dual inhibitor of the protein kinase PAK4 and nicotinamide phosphoribosyl transferase), for treatment of ADPKD...
May 23, 2017: Kidney International
https://www.readbyqxmd.com/read/28532710/early-hospital-readmission-among-hemodialysis-patients-in-the-united-states-is-associated-with-subsequent-mortality
#4
Laura C Plantinga, Laura King, Rachel E Patzer, Janice P Lea, John M Burkart, Jason M Hockenberry, Bernard G Jaar
Dialysis providers in the United States may soon be held accountable for their patients' 30-day hospital readmissions. However, few studies have evaluated the timing of readmissions, which determines the window in which dialysis providers could act to prevent readmission. We therefore examined the timing of readmissions of hemodialysis patients in the United States and its association with mortality among 285,795 prevalent adult Medicare-primary hemodialysis patients from a national registry. Patients had at least one hospitalization in 2010-2013 (first index) and survived for 30 days or more...
May 20, 2017: Kidney International
https://www.readbyqxmd.com/read/28532709/image-texture-features-predict-renal-function-decline-in-patients-with-autosomal-dominant-polycystic-kidney-disease
#5
Timothy L Kline, Panagiotis Korfiatis, Marie E Edwards, Kyongtae T Bae, Alan Yu, Arlene B Chapman, Michal Mrug, Jared J Grantham, Douglas Landsittel, William M Bennett, Bernard F King, Peter C Harris, Vicente E Torres, Bradley J Erickson
Magnetic resonance imaging (MRI) examinations provide high-resolution information about the anatomic structure of the kidneys and are used to measure total kidney volume (TKV) in patients with Autosomal Dominant Polycystic Kidney Disease (ADPKD). Height-adjusted TKV (HtTKV) has become the gold-standard imaging biomarker for ADPKD progression at early stages of the disease when estimated glomerular filtration rate (eGFR) is still normal. However, HtTKV does not take advantage of the wealth of information provided by MRI...
May 20, 2017: Kidney International
https://www.readbyqxmd.com/read/28532708/high-hepatitis-c-viral-load-and-genotype-2-are-strong-predictors-of-chronic-kidney-disease
#6
Tai-Shuan Lai, Mei-Hsuan Lee, Hwai-I Yang, San-Lin You, Sheng-Nan Lu, Li-Yu Wang, Yong Yuan, Gilbert L'Italien, Kuo-Liong Chien, Chien-Jen Chen
Associations between chronic hepatitis C virus (HCV) infection and chronic kidney disease (CKD) remain controversial. Here we aimed to clarify the association between HCV viral load, genotype, and CKD in 13,805 participants aged 30-65 years enrolled in the REVEAL-HCV Study, a community-based prospective study conducted in 1991-1992. CKD was defined by consecutive proteinuria or an estimated glomerular filtration rate (eGFR) under 60 mL/min/1.73 m(2). Chronic HCV infection was defined by detectable HCV viral load...
May 20, 2017: Kidney International
https://www.readbyqxmd.com/read/28528132/the-perceived-medical-condition-self-management-scale-can-be-applied-to-patients-with-chronic-kidney-disease
#7
Marcus G Wild, Kenneth A Wallston, Jamie A Green, Lauren B Beach, Ebele Umeukeje, Julie A Wright Nunes, T Alp Ikizler, Julia Steed, Kerri L Cavanaugh
Chronic Kidney Disease (CKD) is a major burden on patients and the health care system. Treatment of CKD requires dedicated involvement from both caretakers and patients. Self-efficacy, also known as perceived competence, contributes to successful maintenance of patient's CKD self-management behaviors such as medication adherence and dietary regulations. Despite a clear association between self-efficacy and improved CKD outcomes, there remains a lack of validated self-report measures of CKD self-efficacy. To address this gap, the Perceived Kidney/Dialysis Self-Management Scale (PKDSMS) was adapted from the previously validated Perceived Medical Condition Self-Management Scale...
May 18, 2017: Kidney International
https://www.readbyqxmd.com/read/28528131/no-increase-in-the-incidence-of-acute-kidney-injury-in-a-population-based-annual-temporal-trends-epidemiology-study
#8
Kianoush Kashani, Min Shao, Guangxi Li, Amy W Williams, Andrew D Rule, Walter K Kremers, Michael Malinchoc, Ognjen Gajic, John C Lieske
Recent literature suggests an increase in the incidence of acute kidney injury (AKI). We evaluated population-based trends of AKI over the course of nine years, using a validated electronic health record tool to detect AKI. All adult residents (18 years of age and older) of Olmsted County, Minnesota (MN), admitted to the Mayo Clinic Hospital between 2006 and 2014 were included. The incidence rate of AKI was calculated and temporal trends in the annual AKI incident rates assessed. During the nine-year study period, 10,283, and 41,847 patients were admitted to the intensive care unit or general ward, with 1,740 and 2,811 developing AKI, respectively...
May 18, 2017: Kidney International
https://www.readbyqxmd.com/read/28528130/increased-body-mass-index-is-a-risk-factor-for-end-stage-renal-disease-in-the-chinese-singapore-population
#9
Quan-Lan Jasmine Lew, Tazeen Hasan Jafar, Mohammad Talaei, Aizhen Jin, Khuan Yew Chow, Jian-Min Yuan, Woon-Puay Koh
The relationship between body mass index (BMI) and end-stage renal disease (ESRD) is confounded by co-morbidities associated with both conditions. Furthermore, the association at low range BMI is controversial. We studied this association in the Singapore Chinese Health Study, a population-based prospective cohort that recruited Singaporean Chinese men and women 45-74 years of age from 1993 to 1998. Self-reported weight, height, lifestyle factors, usual diet, and medical history were collected via an interviewer-administered questionnaire...
May 18, 2017: Kidney International
https://www.readbyqxmd.com/read/28528129/prophylactic-hydration-to-prevent-contrast-induced-nephropathy-much-ado-about-nothing
#10
Christina M Wyatt, Marianne Camargo, Steven G Coca
Clinical guidelines recommend prophylactic hydration to reduce the risk of contrast-induced nephropathy in high-risk patients, including those with chronic kidney disease. A recent single-center randomized trial showed no significant difference in the incidence of contrast-induced nephropathy in ambulatory patients with stage 3 chronic kidney disease who were randomized to no prophylactic hydration versus normal saline hydration. While these results may identify patients who are less likely to benefit from prophylactic hydration, nephrologists and interventionalists should carefully consider the generalizability of these results to individual patients...
May 18, 2017: Kidney International
https://www.readbyqxmd.com/read/28506762/the-nuclear-phosphatase-scp4-regulates-foxo-transcription-factors-during-muscle-wasting-in-chronic-kidney-disease
#11
Xinyan Liu, Rizhen Yu, Lijing Sun, Giacomo Garibotto, Xia Lin, Yanlin Wang, Sandhya S Thomas, Rongshan Li, Zhaoyong Hu
Chronic kidney disease (CKD) and related inflammatory responses stimulate protein-energy wasting, a complication causing loss of muscle mass. Primarily, muscle wasting results from accelerated protein degradation via autophagic/lysosomal and proteasomal pathways, but mechanisms regulating these proteolysis pathways remain unclear. Since dephosphorylation of FoxOs regulates ubiquitin/proteasome protein metabolism, we tested whether a novel nuclear phosphatase, the small C-terminal domain phosphatase (SCP) 4, regulates FoxOs signaling and, in turn, muscle wasting...
May 12, 2017: Kidney International
https://www.readbyqxmd.com/read/28506761/the-decline-in-kidney-function-with-chromium-exposure-is-exacerbated-with-co-exposure-to-lead-and-cadmium
#12
Tsung-Lin Tsai, Chin-Chi Kuo, Wen-Harn Pan, Yu-Teh Chung, Chiu-Ying Chen, Trong-Neng Wu, Shu-Li Wang
Environmental factors contribute significantly to the pathogenesis of chronic kidney disease. However, these factors, and particularly the toxic effects of heavy metals, have not been completely evaluated. Chromium is a widespread industrial contaminant that has been linked to nephrotoxicity in animal and occupational population studies. Nevertheless, its role in population renal health and its potential interactions with other nephrotoxic metals, such as lead and cadmium, remain unknown. We assessed the association between exposure to chromium, lead, and cadmium with renal function using estimated glomerular filtration rate (eGFR) in an analysis of 360 Taiwanese adults aged 19-84 years from the National Nutrition and Health Survey in Taiwan (2005-2008)...
May 12, 2017: Kidney International
https://www.readbyqxmd.com/read/28506760/patients-double-seropositive-for-anca-and-anti-gbm-antibodies-have-varied-renal-survival-frequency-of-relapse-and-outcomes-compared-to-single-seropositive-patients
#13
Stephen P McAdoo, Anisha Tanna, Zdenka Hrušková, Lisa Holm, Maria Weiner, Nishkantha Arulkumaran, Amy Kang, Veronika Satrapová, Jeremy Levy, Sophie Ohlsson, Vladimir Tesar, Mårten Segelmark, Charles D Pusey
Co-presentation with both ANCA and anti-GBM antibodies is thought to be relatively rare. Current studies of such 'double-positive' cases report small numbers and variable outcomes. To study this further we retrospectively analyzed clinical features and long-term outcomes of a large cohort of 568 contemporary patients with ANCA-associated vasculitis, 41 patients with anti-GBM disease, and 37 double-positive patients with ANCA and anti-GBM disease from four European centers. Double-positive patients shared characteristics of ANCA-associated vasculitis (AAV), such as older age distribution and longer symptom duration before diagnosis, and features of anti-GBM disease, such as severe renal disease and high frequency of lung hemorrhage at presentation...
May 12, 2017: Kidney International
https://www.readbyqxmd.com/read/28506759/complement-c1q-is-hydroxylated-by-collagen-prolyl-4-hydroxylase-and-is-sensitive-to-off-target-inhibition-by-prolyl-hydroxylase-domain-inhibitors-that-stabilize-hypoxia-inducible-factor
#14
Serafim Kiriakidis, Simon S Hoer, Natalie Burrows, Gloria Biddlecome, Moddasar N Khan, Cyrille C Thinnes, Christopher J Schofield, Norma Rogers, Marina Botto, Ewa Paleolog, Patrick H Maxwell
Complement C1q is part of the C1 macromolecular complex that mediates the classical complement activation pathway: a major arm of innate immune defense. C1q is composed of A, B, and C chains that require post-translational prolyl 4-hydroxylation of their N-terminal collagen-like domain to enable the formation of the functional triple helical multimers. The prolyl 4-hydroxylase(s) that hydroxylate C1q have not previously been identified. Recognized prolyl 4-hydroxylases include collagen prolyl-4-hydroxylases (CP4H) and the more recently described prolyl hydroxylase domain (PHD) enzymes that act as oxygen sensors regulating hypoxia-inducible factor (HIF)...
May 12, 2017: Kidney International
https://www.readbyqxmd.com/read/28483380/rac1-activation-in-podocytes-induces-the-spectrum-of-nephrotic-syndrome
#15
Richard Robins, Cindy Baldwin, Lamine Aoudjit, Jean-François Côté, Indra R Gupta, Tomoko Takano
Hyper-activation of Rac1, a small GTPase, in glomerular podocytes has been implicated in the pathogenesis of familial proteinuric kidney diseases. However, the role of Rac1 in acquired nephrotic syndrome is unknown. To gain direct insights into this, we generated a transgenic mouse model expressing a doxycycline-inducible constitutively active form of Rac1 (CA-Rac1) in podocytes. Regardless of the copy number, proteinuria occurred rapidly within five days, and the histology resembled minimal change disease...
May 5, 2017: Kidney International
https://www.readbyqxmd.com/read/28483379/the-incidence-of-pediatric-acute-kidney-injury-is-increased-when-identified-by-a-change-in-a-creatinine-based-electronic-alert
#16
Jennifer Holmes, Gethin Roberts, Kate May, Kay Tyerman, John Geen, John D Williams, Aled O Phillips
A prospective national cohort study was undertaken to collect data on all cases of pediatric (under 18 yrs of age) acute kidney injury (AKI) identified by a biochemistry-based electronic alert using the Welsh National electronic AKI reporting system. Herein we describe the utility and limitation of using this modification of the KDIGO creatinine-based system data set to characterize pediatric AKI. Of 1,343 incident episodes over a 30-month period, 34.5% occurred in neonates of which 83.8% were AKI stage 1. Neonatal 30-day mortality was 4...
May 5, 2017: Kidney International
https://www.readbyqxmd.com/read/28483378/c-myc-promotes-renal-fibrosis-by-inducing-integrin-%C3%AE-v-mediated-transforming-growth-factor-%C3%AE-signaling
#17
Yang Shen, Naijun Miao, Bao Wang, Jinlan Xu, Xinxin Gan, Dan Xu, Li Zhou, Hong Xue, Wei Zhang, Li Yang, Limin Lu
Fibrogenesis involves the activation of renal fibroblasts upon kidney injury. However, the mechanisms underlying renal fibroblast activation are poorly characterized. c-Myc is a predominant oncogene encoding a pleiotropic transcription factor that participates in the regulation of various genes, including genes vital for regulating the cell cycle, cell proliferation, and apoptosis. Here we tested whether renal fibrosis in unilateral ureteral obstruction and folic acid-induced renal fibrosis mouse models are associated with the overexpression of c-Myc...
May 5, 2017: Kidney International
https://www.readbyqxmd.com/read/28476557/podocytes-regulate-the-glomerular-basement-membrane-protein-nephronectin-by-means-of-mir-378a-3p-in-glomerular-diseases
#18
Janina Müller-Deile, Jan Dannenberg, Patricia Schroder, Meei-Hua Lin, Jeffrey H Miner, Rongjun Chen, Jan-Hinrich Bräsen, Thomas Thum, Jenny Nyström, Lynne Beverly Staggs, Hermann Haller, Jan Fiedler, Johan M Lorenzen, Mario Schiffer
The pathophysiology of many proteinuric kidney diseases is poorly understood, and microRNAs (miRs) regulation of these diseases has been largely unexplored. Here, we tested whether miR-378a-3p is a novel regulator of glomerular diseases. MiR-378a-3p has two predicted targets relevant to glomerular function, the glomerular basement membrane matrix component, nephronectin (NPNT), and vascular endothelial growth factor VEGF-A. In zebrafish (Danio rerio), miR-378a-3p mimic injection or npnt knockdown by a morpholino oligomer caused an identical phenotype consisting of edema, proteinuria, podocyte effacement, and widening of the glomerular basement membrane in the lamina rara interna...
May 2, 2017: Kidney International
https://www.readbyqxmd.com/read/28476556/subclinical-chronic-kidney-disease-modifies-the-diagnosis-of-experimental-acute-kidney-injury
#19
Lena Succar, Timothy J Pianta, Trent Davidson, John W Pickering, Zoltán H Endre
Extensive structural damage within the kidney must be present before serum creatinine increases. However, a subclinical phase of chronic kidney disease (CKD) usually goes undetected. Here we tested whether experimental subclinical CKD would modify functional and damage biomarker profiles of acute kidney injury (AKI). Subclinical CKD was induced in rats by adenine or aristolochic acid models but without increasing serum creatinine. After prolonged recovery (three to six weeks), AKI was induced with a subnephrotoxic dose of cisplatin...
May 2, 2017: Kidney International
https://www.readbyqxmd.com/read/28476555/the-third-path-of-tubulointerstitial-fibrosis-aberrant-endothelial-secretome
#20
REVIEW
Mark Lipphardt, Jong W Song, Kei Matsumoto, Sina Dadafarin, Hassan Dihazi, Gerhard Müller, Michael S Goligorsky
The secretome, defined as a portion of proteins secreted by specific cells to the extracellular space, secures a proper microenvironmental niche not only for the donor cells, but also for the neighboring cells, thus maintaining tissue homeostasis. Communication via secretory products exists between endothelial cells and fibroblasts, and this local mechanism maintains the viability and density of each compartment. Endothelial dysfunction, apart from obvious cell-autonomous defects, leads to the aberrant secretome, which predisposes fibroblasts to acquire a myofibroblastic fibrogenic phenotype...
May 2, 2017: Kidney International
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