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https://www.readbyqxmd.com/read/28806770/increasing-creatine-kinase-activity-protects-against-hypoxia-reoxygenation-injury-but-not-against-anthracycline-toxicity-in-vitro
#1
Sevasti Zervou, Hannah J Whittington, Philip J Ostrowski, Fang Cao, Jack Tyler, Hannah A Lake, Stefan Neubauer, Craig A Lygate
The creatine kinase (CK) phosphagen system is fundamental to cellular energy homeostasis. Cardiomyocytes express three CK isoforms, namely the mitochondrial sarcomeric CKMT2 and the cytoplasmic CKM and CKB. We hypothesized that augmenting CK in vitro would preserve cell viability and function and sought to determine efficacy of the various isoforms. The open reading frame of each isoform was cloned into pcDNA3.1, followed by transfection and stable selection in human embryonic kidney cells (HEK293). CKMT2- CKM- and CKB-HEK293 cells had increased protein and total CK activity compared to non-transfected cells...
2017: PloS One
https://www.readbyqxmd.com/read/28805489/atorvastatin-attenuates-experimental-contrast-induced-acute-kidney-injury-a-role-for-tlr4-myd88-signaling-pathway
#2
Rongzheng Yue, Chuan Zuo, Jing Zeng, Baihai Su, Ye Tao, Songmin Huang, Rui Zeng
OBJECTIVES: To investigate the protective effect of different atorvastatin doses on contrast-induced acute kidney injury and the related mechanism. METHODS: Healthy male Sprague-Dawley (SD) rats were randomly divided into the blank control group, experimental control group and different-dose atorvastatin groups. A rat model of contrast-induced acute kidney injury was established. We detected changes in serum creatinine (Scr) and blood urea nitrogen (BUN) before and after model establishment, observed and scored renal tubular injury, analyzed rat renal cell apoptosis, and measure the expression of signal pathway proteins and downstream inflammatory factors...
November 2017: Renal Failure
https://www.readbyqxmd.com/read/28804725/meprin-metalloprotease-deficiency-associated-with-higher-mortality-rates-and-more-severe-diabetic-kidney-injury-in-mice-with-stz-induced-type-1-diabetes
#3
John E Bylander, Faihaa Ahmed, Sabena M Conley, Jean-Marie Mwiza, Elimelda Moige Ongeri
Meprins are membrane-bound and secreted metalloproteinases consisting of α and/or β subunits that are highly expressed in kidney epithelial cells and are differentially expressed in podocytes and leukocytes (macrophages and monocytes). Several studies have implicated meprins in the progression of diabetic nephropathy (DN) and fibrosis-associated kidney disease. However, the mechanisms by which meprins modulate DN are not understood. To delineate the role of meprins in DN, we subjected meprin αβ knockout (αβKO) mice and their wild-type (WT) counterparts to streptozotocin-induced type 1 diabetes...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/28799717/persistent-serum-creatinine-increase-following-contrast-induced-acute-kidney-injury
#4
Carlo Briguori, Cristina Quintavalle, Francesca De Micco, Gabriella Visconti, Vito Di Palma, Giovanni Napolitano, Amelia Focaccio, Gerolama Condorelli
BACKGROUND: Contrast-induced acute kidney injury (CI-AKI) may led to both a transient and a persistent serum creatinine (sCr) increase. OBJECTIVES: To assess whether serum cystatin C (sCyC) and urine and serum neutrophil gelatinase-associated lipocalin (uNGAL, sNGAL) are useful in the early identification of persistent sCr increase following CI-AKI. METHODS: One hundred and eighteen patients who developed CI-AKI were included into the study...
August 11, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28794289/differentiation-of-mesenchymal-stem-cells-towards-nephrogenic-lineage-and-their-enhanced-resistance-to-oxygen-peroxide-induced-oxidative-stress
#5
Asima Tayyeb, Naveed Shahzad, Gibran Ali
INTRODUCTION: Mesenchymal stem cells (MSCs) have been publicized to ameliorate kidney injury both in vitro and in vivo. However, very less is known if MSCs can be differentiated towards renal lineages and their further application potential in kidney injuries. MATERIALS AND METHODS: The present study developed a conditioning system of growth factors fibroblast growth factor 2, transforming growth factor-β2, and leukemia inhibitory factor for in vitro differentiation of MSCs isolated from different sources towards nephrogenic lineage...
July 2017: Iranian Journal of Kidney Diseases
https://www.readbyqxmd.com/read/28776342/could-vitamin-e-prevent-contrast-induced-acute-kidney-injury-a-systematic-review-and-meta-analysis
#6
Myung Hyun Cho, Soo Nyung Kim, Hye Won Park, Sochung Chung, Kyo Sun Kim
Several clinical studies have proposed a protective role for vitamin E (α-tocopherol) against contrast-induced acute kidney injury (CIAKI). The aim of study was to assess the effects of vitamin E for the prevention of CIAKI. A systematic review and meta-analysis was conducted using MEDLINE, EMBASE, and the Cochrane Central Register of Controlled Trials. Randomized controlled trials (RCTs) reporting the effects of vitamin E on CIAKI development and measurements of renal function were included. Four trials including 623 participants were analyzed in the meta-analysis...
September 2017: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/28774741/histopathological-evaluation-and-redox-assessment-in-blood-and-kidney-tissues-in-a-rabbit-contrast-induced-nephrotoxicity-model
#7
Maria-Malvina Tsamouri, Maria Rapti, Paraskevi Kouka, Charitini Nepka, Konstantinos Tsarouhas, Anestis Soumelidis, George Koukoulis, Aristides Tsatsakis, Demetrios Kouretas, Christina Tsitsimpikou
Contrast-induced nephropathy (CIN) is a leading cause of hospital-acquired acute kidney injury as a result of iodinated contrast-media use for diagnostic purposes. Pathophysiology remains unclear. In the present study iopromide was administered to New Zealand white rabbits without any prior intervention. Oxidative stress was assessed in blood and tissue level at three anatomical kidney areas (medullary, cortical, juxtamedullary). Histopathological evaluation was also performed. Serum creatinine and urea increased in the CIN groups over 25% at two hours after administration and returned to baseline at 48 h...
July 31, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28774305/renal-injury-is-accelerated-by-global-hypoxia-inducible-factor-1-alpha-deficiency-in-a-mouse-model-of-stz-induced-diabetes
#8
Romana Bohuslavova, Radka Cerychova, Katerina Nepomucka, Gabriela Pavlinkova
BACKGROUND: Hypoxia inducible factor 1 (HIF-1) activates protective pathways to counteract hypoxia and prevent tissue damage in conjunction with renal injury. The aim of this study was to evaluate a role of HIF-1 in diabetes-induced kidney damage. METHODS: We used a streptozotocin-induced diabetes mouse model and compared biochemical, histological and molecular parameters associated with kidney damage in Hif1α deficient (Hif1α (+/-) ) and wild-type mice. RESULTS: We showed that Hif1α deficiency accelerated pathological changes in the early stage of DN...
August 3, 2017: BMC Endocrine Disorders
https://www.readbyqxmd.com/read/28768971/acute-renal-failure-with-severe-loin-pain-and-patchy-renal-vasoconstriction-in-a-patient-without-hypouricemia-provoked-by-epileptic-seizure
#9
Michitaka Maekawa, Takahiro Imaizumi, Taishi Yamakawa, Yasuhiko Ito
A 26-year-old Japanese man without hypouricemia and with 3 previous episodes of seizures concurrent with acute kidney injury (AKI) was admitted due to an epileptic seizure, lower back pain and AKI. His creatinine kinase levels were slightly elevated. Patchy renal ischemia on contrast-enhanced computed tomography and persistent residual contrast medium was observed, consistent with acute renal failure with severe loin pain and patchy renal ischemia after anaerobic exercise (ALPE). Diffusion-weighted imaging (DWI) demonstrated signal changes in the corresponding area...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28761674/risk-factors-for-worsening-renal-function-and-their-association-with-long-term-mortality-following-transcatheter-aortic-valve-implantation-data-from-the-swedeheart-registry
#10
Georgios Vavilis, Marie Evans, Tomas Jernberg, Andreas Rück, Karolina Szummer
BACKGROUND: The occurrence of persistent acute kidney injury (pAKI) following transcatheter aortic valve implantation (TAVI) has serious implications. METHODS: There were 1540 patients undergoing and surviving TAVI included in the nationwide SWEDEHEART registry between 2008 and 2015. Creatinine was measured at baseline and discharge, and those with baseline estimated glomerular filtration rate (eGFR) <15 mL/min/1.73 m(2) or dialysis were excluded. pAKI was defined by and encompassing theValve Academic Research Consortium-2 (VARC-2) criteria: increase in serum creatinine concentration ≥26...
2017: Open Heart
https://www.readbyqxmd.com/read/28746193/comparing-common-doses-double-dose-vs-usual-dose-of-atorvastatin-for-preventing-contrast-induced-acute-kidney-injury-and-mortality-after-coronary-angiography
#11
COMPARATIVE STUDY
Wei-Jie Bei, Shi-Qun Chen, Hua-Long Li, Deng-Xuan Wu, Chongyang Duan, Ping-Yan Chen, Ji-Yan Chen, Ning Tan, Nian-Jin Xie, Yong Liu
High-dose atorvastatin pretreatment was proved reducing the risk of contrast-induced acute kidney injury (CI-AKI), especially in patients with high C-reactive protein (CRP) levels. We evaluated the effects of common atorvastatin doses (double vs usual) on the risk of CI-AKI and mortality.We recorded outcomes from 1319 patients who were administered periprocedural common doses of atorvastatin. The risks of CI-AKI and mortality between double-dose (40 mg/d) and usual-dose atorvastatin (20 mg/d) were compared using multivariable regression models in all patients or CRP tertile subgroups...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28743805/ephrinb2-regulates-cardiac-fibrosis-through-modulating-the-interaction-of-stat3-and-tgf-%C3%AE-smad3-signaling
#12
Sheng-An Su, Du Yang, Yue Wu, Yao Xie, Wei Zhu, Zhejun Cai, Jian Shen, Zurong Fu, Yaping Wang, Liangliang Jia, Yidong Wang, Jian'an Wang, Meixiang Xiang
Rationale: Cardiac fibrosis is a common feature in left ventricular remodeling that leads to heart failure, regardless of the etiology. Erythropoietin-producing hepatoma interactor B2 (EphrinB2), a pivotal bidirectional signaling molecule ubiquitously expressed in mammals, is crucial in angiogenesis during development and disease progression. Recently, EphrinB2 was reported to protect kidneys from injury-induced fibrogenesis. However, its role in cardiac fibrosis remains to be clarified. Objective: We sought to determine the role of EphrinB2 in cardiac fibrosis and the underlying mechanisms during the pathological remodeling process...
July 25, 2017: Circulation Research
https://www.readbyqxmd.com/read/28740653/diagnosing-and-treating-contrast-induced-acute-kidney-injury-in-2017
#13
EDITORIAL
Vikram Raje, George Feldman, Ion S Jovin
No abstract text is available yet for this article.
June 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28736875/assessment-of-unilateral-ureter-obstruction-with-multi-parametric-mri
#14
Feng Wang, Keiko Takahashi, Hua Li, Zhongliang Zu, Ke Li, Junzhong Xu, Raymond C Harris, Takamune Takahashi, John C Gore
PURPOSE: Quantitative multi-parametric MRI (mpMRI) methods may allow the assessment of renal injury and function in a sensitive and objective manner. This study aimed to evaluate an array of MRI methods that exploit endogenous contrasts including relaxation rates, pool size ratio (PSR) derived from quantitative magnetization transfer (qMT), chemical exchange saturation transfer (CEST), nuclear Overhauser enhancement (NOE), and apparent diffusion coefficient (ADC) for their sensitivity and specificity in detecting abnormal features associated with kidney disease in a murine model of unilateral ureter obstruction (UUO)...
July 24, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28730745/influence-of-minor-deterioration-of-renal-function-after-pci-on-outcome-in-patients-with-st-elevation-myocardial-infarction
#15
Vojko Kanic, David Suran, Maja Vollrath, Alojz Tapajner, Gregor Kompara
OBJECTIVES: Our aim was to assess the possible impact of a deterioration of renal function (DRF) not fulfilling the criteria for acute kidney injury after percutaneous coronary intervention (PCI) on outcome in patients with ST-elevation myocardial infarction (STEMI) on 30-day and long-term outcomes. BACKGROUND: Data is lacking on the influence of DRF after PCI on outcome in patients with STEMI. METHODS: The present study is an analysis of 2572 STEMI patients who underwent PCI...
July 20, 2017: Journal of Interventional Cardiology
https://www.readbyqxmd.com/read/28726528/the-predictive-value-of-the-product-of-contrast-medium-volume-and-urinary-albumin-creatinine-ratio-in-contrast-induced-acute-kidney-injury
#16
Chunrui Wang, Shuai Ma, Bo Deng, Jianxin Lu, Wei Shen, Bo Jin, Haiming Shi, Feng Ding
Preexisting renal impairment and the amount of contrast media are the most important risk factors for contrast-induced acute kidney injury (CI-AKI). We aimed to investigate whether the product of contrast medium volume and urinary albumin/creatinine ratio (CMV × UACR) would be a better predictor of CI-AKI in patients undergoing nonemergency coronary interventions. This was a prospective single-center observational study, and 912 consecutive patients who were exposed to contrast media during coronary interventions were investigated prospectively...
November 2017: Renal Failure
https://www.readbyqxmd.com/read/28724611/tumor-necrosis-factor-alpha-kidney-function-and-hypertension
#17
Eamonn Mehaffey, Dewan Syed Abdul Majid
Hypertension is considered to be a low-grade inflammatory condition characterized by the presence of various pro-inflammatory cytokines. The inflammatory cytokine Tumor Necrosis Factor-alpha (TNF-α) is a constituent of the pro-inflammatory environment that is associated with salt-sensitive hypertension (SSH) and related renal injury. Elevated angiotensin II (AngII) and other factors such as oxidative stress conditions promote TNF-α formation. Many recent studies have provided evidence that TNF-α exerts a direct renal action by regulating hemodynamic and excretory function in the kidney...
July 19, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28720662/proximal-tubule-apical-endocytosis-is-modulated-by-fluid-shear-stress-via-an-mtor-dependent-pathway
#18
Kimberly R Long, Katherine E Shipman, Youssef Rbaibi, Elizabeth V Menshikova, Vladimir B Ritov, Megan L Eshbach, Yu Jiang, Edwin K Jackson, Catherine J Baty, Ora A Weisz
Cells lining the proximal tubule (PT) have unique membrane specializations that are required to maintain the high capacity ion transport and endocytic functions of this nephron segment. PT cells in vivo acutely regulate ion transport in response to changes in glomerular filtration rate (GFR) to maintain glomerulotubular balance. PT cells in culture upregulate endocytic capacity in response to acute changes in fluid shear stress (FSS); however it is not known whether GFR modulates PT endocytosis to enable maximally efficient uptake of filtered proteins in vivo Here we show that cells cultured under continuous FSS develop an expanded apical endocytic pathway as well as increased endocytic capacity and lysosomal biogenesis...
July 18, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28720048/mesangial-proliferative-lupus-nephritis-with-podocytopathy-a-special-entity-of-lupus-nephritis
#19
S F Wang, Y H Chen, D Q Chen, Z Z Liu, F Xu, C H Zeng, W X Hu
Mesangial proliferative lupus nephritis may coexist with podocytopathy, but its clinical-morphological features, treatment response and outcomes have not been compared with mesangial proliferative lupus nephritis without podocytopathy. In this study, 125 biopsies of lupus nephritis patients showing mesangial proliferation with mesangial immune deposits were collected and divided into podocytopathy group (defined as podocyte foot process effacement (FPE) >50% with nephrotic syndrome (NS)) and mesangial group (FPE ≤50%, or FPE >50% without NS)...
January 1, 2017: Lupus
https://www.readbyqxmd.com/read/28715949/contrast-enhanced-ultrasound-for-assessing-renal-perfusion-impairment-and-predicting-acute-kidney-injury-to-chronic-kidney-disease-progression
#20
Wei Cao, Shuang Cui, Li Yang, Chunyi Wu, Jian Liu, Fang Yang, Youhua Liu, Jianping Bin, Fan Fan Hou
AIMS: Acute kidney injury (AKI) is increasingly recognized as a major risk factor leading to progression to chronic kidney disease (CKD). However, the diagnostic tools for predicting AKI to CKD progression are particularly lacking. Here, we tested the utility of contrast enhanced ultrasound (CEUS) for predicting progression to CKD after AKI by using both mild (20-minute) and severe (45-minute) bilateral renal ischemia/reperfusion injury (IRI) mice. RESULTS: Renal perfusion measured by CEUS reduced to 25%±7% and 14%±6% of the pre-ischemic levels in mild and severe AKI 1 hour after ischemia (P<0...
July 17, 2017: Antioxidants & Redox Signaling
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