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renal IRI

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https://www.readbyqxmd.com/read/28541267/choroidal-melanoma-sector-melanocytosis-and-retinal-pigment-epithelial-microdetachments-in-birt-hogg-dub%C3%A3-syndrome
#1
Charlotte L Marous, Molly R Marous, R Joel Welch, Jerry A Shields, Carol L Shields
PURPOSE: Birt-Hogg-Dubé Syndrome (BHDS) is a rare autosomal dominant condition that can predispose patients to numerous cutaneous fibrofolliculomas and other cutaneous lesions, pulmonary cysts with spontaneous pneumothorax, and multifocal renal tumors and cancer. The genetic mutations responsible for BHDS are related to tumor suppression and the mammalian target of rapamycin (mTOR) pathway. Previous reports of the ocular findings in BHDS include eyelid fibrofolliculomas, "flecked chorioretinopathy," and one report of choroidal melanoma...
May 22, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28539382/il233-a-novel-il-2-and-il-33-hybrid-cytokine-ameliorates-renal-injury
#2
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/28520087/geographic-variation-and-risk-factors-for-systemic-and-limb-ischemic-events-in-patients-with-symptomatic-peripheral-artery-disease-insights-from-the-reach-registry
#3
Jérémie Abtan, Deepak L Bhatt, Yedid Elbez, Emmanuel Sorbets, Kim Eagle, Christopher M Reid, Iris Baumgartner, David Wu, Mary E Hanson, Hakima Hannachi, Puneet K Singhal, Philippe Gabriel Steg, Gregory Ducrocq
BACKGROUND: Patients with symptomatic peripheral artery disease (PAD) are at high risk of ischemic events. However, data about predictors of this risk are limited. HYPOTHESIS: We analyzed baseline characteristics and 4-year follow-up of patients enrolled in the international REduction of Atherothrombosis for Continued Health (REACH) Registry with symptomatic PAD and no history of stroke/transient ischemic attack to describe annual rates of recurrent ischemic events globally and geographically...
May 18, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28515179/arginase-2-mediates-renal-ischemia-reperfusion-injury
#4
Wesley M Raup-Konsavage, Ting Gao, Timothy K Cooper, Sidney M Morris, W Brian Reeves, Alaa S Awad
Novel therapeutic interventions for preventing or attenuating kidney injury following ischemia/reperfusion injury (IRI) remain a focus of significant interest. Currently, there are no definitive therapeutic or preventive approaches available for ischemic acute kidney injury (AKI). Our objective is to determine (a) whether renal arginase activity or expression is increased in renal IRI and (b) whether arginase plays a role in development of renal IRI. The impact of arginase activity and expression on renal damage was evaluated in male C57BL/6J (WT) and arginase-2 deficient (Arg2(-/-) ) mice subjected to bilateral renal ischemia for 28min followed by reperfusion for 24h...
May 17, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28501343/changes-of-renal-sinus-fat-and-renal-parenchymal-fat-during-an-18-month-randomized-weight-loss-trial
#5
Hila Zelicha, Dan Schwarzfuchs, Ilan Shelef, Yftach Gepner, Gal Tsaban, Lilac Tene, Anat Yaskolka Meir, Avital Bilitzky, Oded Komy, Noa Cohen, Nitzan Bril, Michal Rein, Dana Serfaty, Shira Kenigsbuch, Yoash Chassidim, Benjamin Sarusi, Joachim Thiery, Uta Ceglarek, Michael Stumvoll, Matthias Blüher, Yosef S Haviv, Meir J Stampfer, Assaf Rudich, Iris Shai
BACKGROUND & AIMS: Data regarding the role of kidney adiposity, its clinical implications, and its dynamics during weight-loss are sparse. We investigated the effect of long-term weight-loss induced intervention diets on dynamics of renal-sinus-fat, an ectopic fat depot, and %renal-parenchymal-fat, lipid accumulation within the renal parenchyma. METHODS: We randomized 278 participants with abdominal obesity/dyslipidemia to low-fat or Mediterranean/low-carbohydrate diets, with or without exercise...
May 2, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28500075/overexpression-of-human-cd55-and-cd59-or-treatment-with-human-cd55-protects-against-renal-ischemia-reperfusion-injury-in-mice
#6
Anjan K Bongoni, Bo Lu, Evelyn J Salvaris, Veena Roberts, Doreen Fang, Jennifer L McRae, Nella Fisicaro, Karen M Dwyer, Peter J Cowan
Deficiency in the membrane-bound complement regulators CD55 and CD59 exacerbates renal ischemia-reperfusion injury (IRI) in mouse models, but the effect of increasing CD55 and CD59 activity has not been examined. In this study, we investigated the impact of overexpression of human (h) CD55 ± hCD59 or treatment with soluble rhCD55 in a mouse model of renal IRI. Unilaterally nephrectomised mice were subjected to 18 (mild IRI) or 22 min (moderate IRI) warm renal ischemia, and analyzed 24 h after reperfusion for renal function (serum creatinine and urea), complement deposition (C3b/c and C9), and infiltration of neutrophils and macrophages...
May 12, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28496138/severe-bilateral-ischemic-reperfusion-renal-injury-hyperacute-and-acute-changes-in-apparent-diffusion-coefficient-t1-and-t2-mapping-with-immunohistochemical-correlations
#7
Sheung-Fat Ko, Hon-Kan Yip, Yen-Yi Zhen, Chia-Chang Lee, Chen-Chang Lee, Shyh-Jer Huang, Chung-Cheng Huang, Shu-Hang Ng, Jui-Wei Lin
The aim of this study was to investigate the hyperacute and acute changes in apparent diffusion coefficient (ADC), T1, and T2 mapping in rat kidneys after severe bilateral renal ischemic-reperfusion injury (IRI). After baseline MRI, 24 Spraque-Dawley rats with renal IRI were divided equally as group 1 (post-IRI MRI at 6 hours, days 1, 3, and 7) and groups 2, 3, and 4 (post-IRI MRI at 6 hours; 6 hours and day 1; 6 hours, days 1 and 3, respectively), while six other rats without IRI (group 5) were used as sham control...
May 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28488081/plasma-alpha-tochopherol-determined-by-hplc-in-dogs-at-different-stages-of-chronic-kidney-disease-a-retrospective-study
#8
Ilaria Lippi, F Perondi, V Meucci, C Mannarini, L Intorre, G Guidi
The aim of the present study was to investigate retrospectively the plasma concentration of alpha-tocopherol in dogs with naturally acquired chronic kidney disease (CKD), at different stages of severity. Forty dogs (CKD group) with different stages of CKD (IRIS 1 n=12, IRIS 2 n=8, IRIS 3 n=11, IRIS 4 n=9) and 20 clinically healthy dogs were considered. Plasma alpha-tocopherol was assessed in both groups through high performance liquid chromatography (HPLC). Dogs of CKD group showed significantly lower (p=0...
May 9, 2017: Veterinary Research Communications
https://www.readbyqxmd.com/read/28479364/involvement-of-organic-cation-transporters-in-the-kinetics-of-trimethylamine-n-oxide
#9
Takeshi Miyake, Tadahaya Mizuno, Tatsuki Mochizuki, Miyuki Kimura, Shunji Matsuki, Shin Irie, Ichiro Ieiri, Maeda Kazuya, Hiroyuki Kusuhara
Recent studies suggest that trimethylamine N-oxide (TMAO) is associated with the development of chronic kidney disease and heart failure. In this study, we investigated the importance of organic cation transporters (OCTs) in the clearance and tissue distribution of TMAO. The low affinity and high capacity transport of TMAO by mouse and human OCT1 and OCT2 was observed. Uptake and efflux of TMAO by the mouse hepatocytes as well as TMAO uptake into mouse kidney slices were significantly decreased by the addition of tetraethylammonium or Oct1/2 double knockout (dKO)...
May 4, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28476205/therapeutic-efficacy-of-human-umbilical-cord-mesenchymal-stem-cells-transplantation-against-renal-ischemia-reperfusion-injury-in-rats
#10
Sohair R Fahmy, Amel M Soliman, Mervat El Ansary, Samah Abd Elhamid, Heba Mohsen
BACKGROUND: Acute kidney injury (AKI) is a common clinical problem raising the urgent needs to develop new strategies for treatment. The present study investigated the therapeutic potential of human umbilical cord - mesenchymal stem cells (HUC-MSCs) transplantation against renal ischemia/reperfusion injury (IRI) in rats. METHODS: Twenty four male Wistar rats were assigned into two main groups, sham group (control group) and I/R group. I/R group was injected in the tail vein with either phosphate buffer saline (PBS) or HUC-MSCs...
April 25, 2017: Tissue & Cell
https://www.readbyqxmd.com/read/28472797/up-regulation-of-hmgb1-exacerbates-renal-ischemia-reperfusion-injury-by-stimulating-inflammatory-and-immune-responses-through-the-tlr4-signaling-pathway-in-mice
#11
Chuan-Bao Chen, Long-Shan Liu, Jian Zhou, Xiao-Ping Wang, Ming Han, Xing-Yuan Jiao, Xiao-Shun He, Xiao-Peng Yuan
BACKGROUND/AIMS: The aim of this study was to elucidate how high-mobility group box 1 (HMGB1) exacerbates renal ischemic-reperfusion injury (IRI) by inflammatory and immune responses through the toll-like receptor 4 (TLR4) signaling pathway. METHODS: A total of 30 wild-type (WT) mice and 30 TLR4 knockout (TLR4-/-) mice were selected and then randomly assigned to the Sham, I/R or HMGB1 groups. The serum and kidney tissues of all mice were collected 24 h after the perfusion...
May 3, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28472786/roles-of-the-exogenous-h2s-mediated-sr-a-signaling-pathway-in-renal-ischemia-reperfusion-injury-in-regulating-endoplasmic-reticulum-stress-induced-autophagy-in-a-rat-model
#12
Qing Ling, Xiao Yu, Tao Wang, Shao-Gang Wang, Zhang-Qun Ye, Ji-Hong Liu
OBJECTIVE: This study aims to explore the effects of the exogenous hydrogen sulfide (H2S)-mediated scavenger receptor A (SR-A) signaling pathway on renal ischemia/reperfusion injury (IRI) by regulating endoplasmic reticulum (ER) stress-induced autophagy in rats. METHODS: A total of 48 normal Sprague-Dawley (SD) rats and SR-A knockout rats were selected and divided into six groups (n = 8): wild-type (WT) + sham, WT + ischemia-reperfusion (I/R), WT + I/R + NaHS, SR-A-/- + sham, SR-A-/- + I/R and SR-A-/- + I/R + NaHS...
May 4, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28470945/mri-evaluation-of-renal-ischemia-reperfusion-injury-in-rabbit-model
#13
Liang Pan, Jie Chen, Wei Xing, Zhaoyu Xing, Jinggang Zhang, Yan Peng, Zhuoli Zhang
To evaluate the feasibility of susceptibility weighted imaging (SWI) as a tool to identify the changes in the renal outer medulla (OM) in a rabbit model of renal ischemia reperfusion injury (IRI). New Zealand rabbits were used in this study (control = 10 and IRI groups = 40). The rabbits in the IRI group were subjected to left renal artery clamping for 60 minutes. T2-weighted (T2WI) and SWI examinations were performed at 1 h, 12 h, 24 h and 48 h after reperfusion (each n = 10). After the examinations, nephrectomy was performed for histologic evaluation...
May 4, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28466227/protective-effects-and-mechanisms-of-shenhua-tablet-on-toll-like-receptors-in-rat-model-of-renal-ischemia-reperfusion-injury
#14
Qing-Ping Li, Ri-Bao Wei, Xi Yang, Xiao-Yong Zheng, Ting-Yu Su, Meng-Jie Huang, Zhong Yin, Xiang-Mei Chen
OBJECTIVES: To investigate the protective effects and potential mechanisms of Shenhua Tablet (, SHT) on the toll-like receptors (TLRs)-mediated signaling pathways in a rat model of kidney ischemia-reperfusion injury (IRI). METHODS: Sixty male Wistar rats were randomly divided into 5 groups: sham surgery, model control, astragaloside (150 mg•kg(-1)•d(-1)), low- and high-dose SHT (1.5 and 3.0 g•kg(-1)•d(-1), repectively) groups. One week after drug treatment, rats underwent surgery to establish the IRI models...
May 3, 2017: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/28426710/change-in-iron-metabolism-in-rats-after-renal-ischemia-reperfusion-injury
#15
Guang-Liang Xie, Lin Zhu, Yan-Min Zhang, Qian-Nan Zhang, Qing Yu
Previous studies have indicated that hepcidin, which can regulate iron efflux by binding to ferroportin-1 (FPN1) and inducing its internalization and degradation, acts as the critical factor in the regulation of iron metabolism. However, it is unknown whether hepcidin is involved in acute renal ischemia/reperfusion injury (IRI). In this study, an IRI rat model was established via right renal excision and blood interruption for 45 min in the left kidney, and iron metabolism indexes were examined to investigate the change in iron metabolism and to analyze the role of hepcidin during IRI...
2017: PloS One
https://www.readbyqxmd.com/read/28423178/head-to-head-comparison-of-structurally-unrelated-dpp4-inhibitors-in-the-setting-of-renal-ischemia-reperfusion-injury
#16
Christoph Reichetzeder, Karoline von Websky, Oleg Tsuprykov, Azadeh Mohagheghi Samarin, Luise Gabriele Falke, Sulistyo Emantoko Dwi Putra, Ahmed Abdallah Hasan, Viktoriia Antonenko, Caterina Curato, Jörg Rippman, Thomas Klein, Berthold Hocher
BACKGROUND AND PURPOSE: Results regarding protective effects of DPP4 inhibitors in renal ischemia-reperfusion-injury (IRI) are conflicting. The current study performed a head-to-head comparison of structurally unrelated DPP4 inhibitors in the setting of renal IRI. EXPERIMENTAL APPROACH: IRI was induced in uninephrectomized male rats by renal artery clamping for 30 minutes. The sham group was uninephrectomized but not subjected to IRI. DPP4 inhibitors or vehicle were given p...
April 18, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28419560/fibroblast-growth-factor-23-concentration-in-dogs-with-chronic-kidney-disease
#17
L M Harjes, V J Parker, K Dembek, G S Young, L H Giovaninni, M M Kogika, D J Chew, R E Toribio
BACKGROUND: Chronic kidney disease (CKD) is associated with hyperphosphatemia, decreased vitamin D metabolite concentrations, and hyperparathyroidism. This syndrome is known as CKD-mineral bone disorder (CKD-MBD). Recently, it has been shown that an increase in fibroblast growth factor-23 (FGF-23) concentration is an early biomarker of CKD in people. It is an independent risk factor for both progression of renal disease and survival time in humans and cats with CKD. Information about FGF-23 in healthy dogs and those with CKD is lacking...
May 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28396578/comparative-characterization-of-decellularized-renal-scaffolds-for-tissue-engineering
#18
Iris Fischer, Michael Westphal, Bella Rossbach, Nicole Bethke, Krithika Hariharan, Imran Ullah, Petra Reinke, Andreas Kurtz, Harald Stachelscheid
Native extracellular matrix (ECM) provides scaffolds for tissue engineering with natural architecture and biochemical composition. Maintaining the native ECM in decellularized tissues provides cues for cells, which promote their tissue specific arrangement and function. Several approaches have been used to decellularize ECM from the kidney in order to reestablish renal tissue but their comparability is hampered because methods for decellularization and assessment of ECM vary widely. Therefore, we applied a standardized immersion protocol to decellularize porcine kidney tissue with three detergents Triton X-100, sodium dodecyl sulfate (SDS) and sodium deoxycholate (SDC) at variable temperatures...
April 11, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28391169/hypoxia-induced-extracellular-vesicles-mediate-protection-of-remote-ischemic-preconditioning-for-renal-ischemia-reperfusion-injury
#19
Guangyuan Zhang, Yu Yang, Yeqing Huang, Lei Zhang, Zhixin Ling, Yingjian Zhu, Feng Wang, Xiangyu Zou, Ming Chen
Remote ischemic preconditioning (rIPC) is a reliable strategy for prevention of injury to various organs. However the mechanism by which it does so is still unclear. In the present study, serum and EVs isolated from ischemic preconditioned right renal venous perfusates were injected into rats with ischemia-reperfusion-injured kidneys immediately after reperfusion. The animals were killed 24h later. Tubular scores and renal function were tested to evaluate the therapeutic effects. To further explore the underlying mechanism, HK-2 cells derived EVs under hypoxia were also administrated to rats with left kidney IRI...
June 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28382533/quantified-kidney-echogenicity-in-mice-with-renal-ischemia-reperfusion-injury-evaluation-as-a-noninvasive-biomarker-of-acute-kidney-injury
#20
Shinya Murata, Noriyuki Sugiyama, Kentaro Maemura, Yoshinori Otsuki
The purpose is to evaluate quantified kidney echogenicity as a biomarker for the early diagnosis of acute kidney injury (AKI) and predicting progression to chronic kidney disease (CKD) in a mouse model of ischemia-reperfusion injury (IRI). Two separate protocols of murine models of IRI were used: (1) 10, 30, and 40 min of bilateral ischemia duration and (2) 45 and 60 min of unilateral ischemia duration. Renal echogenicity was measured with ultrasound and compared with serum creatinine or urine neutrophil gelatinase-associated lipocalin (NGAL) at various timepoints after IRI...
April 5, 2017: Medical Molecular Morphology
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