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https://www.readbyqxmd.com/read/28922144/short-term-hypoxia-and-vasa-recta-function-in-kidney-slices
#1
D Braun, S Dietze, T M J Pahlitzsch, I C Wennysia, P B Persson, M Ludwig, A Patzak
BACKGROUND: Vasa recta (VR) supply the inner part of outer renal medulla an area at risk for hypoxic damages. OBJECTIVE: We hypothesize increased vasoreactivity after hypoxia/re-oxygenation (H/R) in VR, which might contribute to the reduced medullary perfusion after an ischemic event. METHODS: Live kidney slices (200μm) from SD rats were used for functional experiments. TUNEL assay and H&E staining were used to estimate slice viability. Kidney slices were treated with carbogen or hypoxia (1% O2) for 60 or 90 min and vasoreactivity to Ang II (10-7 M) was recorded by DIC microscopy after re-oxygenation with carbogen...
September 11, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28921399/artesunate-inhibits-renal-ischemia-reperfusion-stimulated-lung-inflammation-in-rats-by-activating-ho-1-pathway
#2
Zhaohui Liu, Junjie Zhang, Shitong Li, Jihong Jiang
Artesunate (AS), a semi-synthetic derivative of Artemisia, has been shown to exert a wide range of pharmacological effects, such as anti-inflammatory and antioxidant functions. However, the protective functions of AS on renal ischemia reperfusion injury (RIR)-stimulated lung inflammation remain unclear. In this research, acute lung injury (ALI) was stimulated by renal ischemia reperfusion injury (RIR). AS (15 mg/kg) was intraperitoneal administrated to rat 1 h before RIR stimulation. Serum and pulmonary NO, MDA, IL-6, MIP-2, and PGE2 levels, arterial blood gas and biochemistry, lung wet/dry weight ratio and MPO activity, total cell number and protein concentration in BALF, tissue histology, and NF-κB expression were determined...
September 18, 2017: Inflammation
https://www.readbyqxmd.com/read/28916603/phase-2a-clinical-trial-of-mitochondrial-protection-elamipretide-during-stent-revascularization-in-patients-with-atherosclerotic-renal-artery-stenosis
#3
Ahmed Saad, Sandra M S Herrmann, Alfonso Eirin, Christopher M Ferguson, James F Glockner, Haraldur Bjarnason, Michael A McKusick, Sanjay Misra, Lilach O Lerman, Stephen C Textor
BACKGROUND: Atherosclerotic renal artery stenosis reduces renal blood flow (RBF) and amplifies stenotic kidney hypoxia. Revascularization with percutaneous transluminal renal angioplasty (PTRA) and stenting often fails to recover renal function, possibly because of ischemia/reperfusion injury developing after PTRA. Elamipretide is a mitochondrial-targeted peptide that binds to cardiolipin and stabilizes mitochondrial function. We tested the hypothesis that elamipretide plus PTRA would improve renal function, oxygenation, and RBF in patients with atherosclerotic renal artery stenosis undergoing PTRA...
September 2017: Circulation. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28913500/neuroendocrine-stress-response-implications-for-cardiac-surgery-associated-acute-kidney-injury
#4
REVIEW
J Mauricio Del Rio, Alina Nicoara, Madhav Swaminathan
Surgical stress causes biochemical and physiologic perturbations of every homeostatic axis. These alterations include volume/baroreceptor regulation, sympathetic activation, parasympathetic suppression, neuroendocrine activation, acute phase response protein synthesis and secretion, immune response modulation and long-term behavioral adaptation. The kidney is central to the stress response because of its main role in the maintenance of water, electrolyte balance and hence, intracellular and extracellular compartments, including the intravascular volume...
April 2017: Rom J Anaesth Intensive Care
https://www.readbyqxmd.com/read/28910975/emerging-role-of-hur-in-inflammatory-response-in-kidney-diseases
#5
Jin Shang, Zhanzheng Zhao
Human antigen R (HuR) is a member of the embryonic lethal abnormal vision (ELAV) family which can bind to the A/U rich elements in 3' un-translated region of mRNA and regulate mRNA splicing, transportation, and stability. Unlike other members of the ELAV family, HuR is ubiquitously expressed. Early studies mainly focused on HuR function in malignant diseases. As researches proceed, more and more proofs demonstrate its relationship with inflammation. Since most kidney diseases involve pathological changes of inflammation, HuR is now suggested to play a pivotal role in glomerular nephropathy, tubular ischemia-reperfusion damage, renal fibrosis and even renal tumors...
September 1, 2017: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/28904432/impact-of-steroids-on-the-inflammatory-response-after-ischemic-acute-kidney-injury-in-rats
#6
J Fontana, A Vogt, A Hohenstein, U Vettermann, E Doroshenko, E Lammer, B A Yard, S Hoeger
Inflammation plays a crucial role in acute kidney injury (AKI). The current study was designed to analyze the influence of prednisolone treatment on the inflammatory reaction during the first 96 h after AKI induction in a rat model. AKI was induced by unilateral clipping of the renal vessels. The treatment group received prednisolone 5 mg/kg s.c. daily. Infiltration rates of macrophages, leukocytes, and T-cells (24, 96 h) as well as plasma concentrations of the inflammatory markers intercellular adhesion molecule, interleukin-1 beta (IL-1β), IL-18, IL-6, and tumor necrosis factor-alpha (0, 6, 24, 96 h) were determined by fluorescence-activated cell sorting (FACS) analysis only...
September 2017: Indian Journal of Nephrology
https://www.readbyqxmd.com/read/28903379/extracorporeal-shock-wave-treatment-attenuated-left-ventricular-dysfunction-and-remodeling-in-mini-pig-with-cardiorenal-syndrome
#7
Jiunn-Jye Sheu, Hani E E Ali, Ben-Chung Cheng, Hsin-Ju Chiang, Pei-Hsun Sung, Kuan-Hung Chen, Chih-Chao Yang, Yen-Ta Chen, John Y Chiang, Pao-Yuan Lin, Sarah Chua, Han-Tan Chai, Sheng-Ying Chung, Cheuk-Kwan Sun, Hon-Kan Yip
This study tested the hypothesis that extracorporeal shock wave (ECSW) treatment can improve ischemia-induced left ventricular (LV) dysfunction in mini-pig with co-existing chronic kidney disease (CKD). LV ischemia in mini-pigs was induced by applying an ameroid constrictor over mid-left anterior descending artery (LAD), while model of CKD was established by right nephrectomy with partial ligation of left renal arterioles 2 weeks before LAD constriction. Thirty mini-pigs were randomly divided into group 1 (sham-control), group 2 (LV-ischemia), group 3 (LV-ischemia + CKD), Group 4 [LV-ischemia + ECSW (applied 1200 shots at 0...
August 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28902935/perconditioning-combined-with-postconditioning-on-kidney-ischemia-and-reperfusion
#8
Felipe Lobato da Silva Costa, Vitor Nagai Yamaki, Renan Kleber Costa Teixeira, Daniel Haber Feijó, André Lopes Valente, Luan Teles Ferreira de Carvalho, Edson Yuzur Yasojima, Marcus Vinicius Henriques Brito
Purpose: To evaluate if combination of perconditioning and postconditioning provides improved renal protection compared to perconditioning alone in a model of renal reperfusion injury. Methods: Thirty rats were assigned into 6 groups: normality; sham; ischemia and reperfusion; postconditioning; perconditioning; perconditioning + postconditioning. Animals were subjected to right nephrectomy and left renal ischemia for 30 minutes. Postconditioning consisted of 3 cycles of 5 min renal perfusion followed by 5 min of renal ischemia after major ischemic period...
August 2017: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/28900672/extracorporeal-membrane-oxygenation-in-adult-patients-with-acute-fulminant-myocarditis-clinical-outcomes-and-risk-factor-analysis
#9
X Liao, B Li, Z Cheng
BACKGROUND: Our study aimed to summarize the clinical outcomes of extracorporeal membrane oxygenation (ECMO) in adult patients with acute fulminant myocarditis and to investigate the risk factors associated with its application. PATIENTS AND METHODS: We retrospectively examined patients with cardiogenic shock and acute fulminant myocarditis. The following data were collected: patients' preoperative general condition, related clinical factors during ECMO, complications, and outcomes of ECMO...
September 12, 2017: Herz
https://www.readbyqxmd.com/read/28895768/protective-effects-of-taurine-against-renal-ischemia-reperfusion-injury-in-rats-by-inhibition-of-gelatinases-mmp-2-and-mmp-9-and-p38-mitogen-activated-protein-kinase-signaling
#10
Z Cavdar, C Ural, A Celik, S Arslan, G Terzioglu, S Ozbal, S Yildiz, U B Ergur, E Guneli, T Camsari, G Akdogan
Dysregulated expression of matrix metalloproteinases (MMPs) is closely associated with the pathogenesis of renal ischemia/reperfusion injury (I/R). The production of excessive reactive oxygen species (ROS) causes tissue damage. Increased ROS production causes activation of p38 mitogen-activated protein kinase (MAPK) signaling, which participates in gene regulation of MMPs, especially MMP-2 and MMP-9 (gelatinases). Taurine (2-aminoethanesulfonic acid) in mammalian cells functions in bile acid conjugation, maintenance of calcium homeostasis, osmoregulation, membrane stabilization, and antioxidation, antiinflammatory, and antiapoptotic action...
September 12, 2017: Biotechnic & Histochemistry: Official Publication of the Biological Stain Commission
https://www.readbyqxmd.com/read/28894081/eculizumab-in-renal-transplantation-a-2017-update
#11
Ryszard Grenda, Magdalena Durlik
Despite ongoing progress in renal transplantation, there are still emerging challenges in this field, including consequences of ischemia-reperfusion injury (IRI), pre-existing and produced de novo anti-HLA donor-specific antibodies (DSA), and acute/chronic humoral rejection (AMR), as well as the recurrence of atypical hemolytic-uremic syndrome (aHUS) in genetically predisposed patients. All these conditions are related to the prominent role of the complement system and are deleterious to the fate of the renal graft...
September 12, 2017: Annals of Transplantation: Quarterly of the Polish Transplantation Society
https://www.readbyqxmd.com/read/28893213/application-and-analysis-of-retroperitoneal-laparoscopic-partial-nephrectomy-with-sequential-segmental-renal-artery-clamping-for-patients-with-multiple-renal-tumor-initial-experience
#12
Jundong Zhu, Fan Jiang, Pu Li, Pengfei Shao, Chao Liang, Aiming Xu, Chenkui Miao, Chao Qin, Zengjun Wang, Changjun Yin
BACKGROUND: To explore the feasibility and safety of retroperitoneal laparoscopic partial nephrectomy with sequential segmental renal artery clamping for the patients with multiple renal tumor of who have solitary kidney or contralateral kidney insufficiency. METHODS: Nine patients who have undergone retroperitoneal laparoscopic partial nephrectomy with sequential segmental renal artery clamping between October 2010 and January 2017 were retrospectively analyzed...
September 11, 2017: BMC Urology
https://www.readbyqxmd.com/read/28890065/comparison-of-endovascular-stent-grafts-for-abdominal-aortic-aneurysm-repair-in-medicare-beneficiaries
#13
Dominique B Buck, Peter A Soden, Sarah E Deery, Sara L Zettervall, Klaas H J Ultee, Bruce E Landon, A James O'Malley, Marc L Schermerhorn
BACKGROUND: Increased renal complications have been suggested with suprarenal stent grafts, but long-term analyses have been limited. Therefore, the purpose of this study was to evaluate the effect of endograft choice on perioperative and long-term outcomes. METHODS: We compared Medicare beneficiaries undergoing endovascular AAA repair from 2005-2008 with endografts with infrarenal fixation and a single docking limb (AneuRx, Excluder) to those with suprarenal fixation and two docking limbs (Zenith), or a unibody configuration (Powerlink)...
September 7, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28889600/normothermic-ex-vivo-kidney-perfusion-for-graft-quality-assessment-prior-to-transplantation
#14
J Moritz Kaths, Mátyás Hamar, Juan Echeverri, Ivan Linares, Peter Urbanellis, Jun Yu Cen, Sujani Ganesh, Luke S Dingwell, Paul Yip, Rohan John, Darius Bagli, Istvan Mucsi, Anand Ghanekar, David Grant, Lisa A Robinson, Markus Selzner
Normothermic ex vivo kidney perfusion (NEVKP) represents a novel approach for graft preservation and functional improvement in kidney transplantation. We investigated whether NEVKP also allows graft quality assessment prior to transplantation. Kidneys from 30kg pigs were recovered in a model of heart-beating donation (HBD) (group A), following 30min of warm ischemia (WI) (group B), or 60min WI (group C) (n=5/group). Following 8hrs of NEVKP, contralateral kidneys were resected, grafts autotransplanted, and pigs followed for 3 days...
September 10, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28887906/sphingosine-1-phosphate-and-renal-vasoconstriction
#15
EDITORIAL
Boye L Jensen
In the present issue of Acta Physiologica, Guan et al. in their article "Mechanisms of sphingosine-1-phosphate-mediated vasoconstriction of rat afferent arterioles" (1) address the signaling events associated with sphingosine-1-phosphate (S1P)-mediated renal afferent vasoconstriction and show in, technically demanding, blood-perfused juxtamedullary nephron preparation that S1P signaling relies predominantly on transmembrane calcium influx from the extracellular fluid through L-type calcium channels with contribution from oxidative stress metabolites(1) ...
September 9, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/28887239/atorvastatin-protect-kidney-from-remote-reperfusion-injury
#16
Carlos Henrique Marques Dos Santos, Doroty Mesquita Dourado, Baldomero Antonio Kato da Silva, Henrique Budib Dorsa Pontes, Euler de Azevedo Neto, Giovanna Serra da Cruz Vendas, Ian de Oliveira Chaves, João Victor Cunha Miranda, João Victor Durães Gomes Oliva, Letícia do Espirito Santo Dias, Murillo Henrique Martins de Almeida, Trícia Luna Sampaio
BACKGROUND: There is a need to find an effective treatment against reperfusion injury. The aim of the present study was to evaluate the capacity of the ischemic postconditioning and statin to prevent renal reperfusion injury. DESIGN AND SETTING: An experimental study developed at Universidade Anhanguera-Uniderp. METHODS: A total of 41 Wistar rats were distributed into 5 groups: ischemia and reperfusion (I/R), ischemic postconditioning (IPC), postconditioning + statin (IPC + S), statin (S) and Sham...
September 5, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28886525/perillyl-alcohol-protects-human-renal-tubular-epithelial-cells-from-hypoxia-reoxygenation-injury-via-inhibition-of-ros-endoplasmic-reticulum-stress-and-activation-of-pi3k-akt-enos-pathway
#17
Yixiao Xu, Wantie Wang, Keke Jin, Qifan Zhu, Hongzhou Lin, Minye Xie, Dexuan Wang
Ischemia/reperfusion (I/R) injury plays an essential role in renal transplantation, and represents a crucial risk factor for allograft dysfunction and acute renal failure. Modulation of oxidative stress is an effective therapeutic strategy for I/R injury. Perillyl alcohol (POH), a dietary monoterpene with antioxidant activity is found in a variety of plants. The study was carried out to investigate whether treatment of POH could reduce hypoxia/reoxygenation (H/R)-induced injury. H/R induced significant injury in HK-2 cells...
September 5, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28886014/downregulation-of-autophagy-is-associated-with-severe-ischemia-reperfusion-induced-acute-kidney-injury-in-overexpressing-c-reactive-protein-mice
#18
Ao Bian, Mingjun Shi, Brianna Flores, Nancy Gillings, Peng Li, Shirley Xiao Yan, Beth Levine, Changying Xing, Ming Chang Hu
C-reactive protein (CRP), was recently reported to be closely associated with poor renal function in patients with acute kidney injury (AKI), but whether CRP is pathogenic or a mere biomarker in AKI remains largely unclear. Impaired autophagy is known to exacerbate renal ischemia-reperfusion injury (IRI). We examined whether the pathogenic role of CRP in AKI is associated with reduction of autophagy. We mated transgenic rabbit CRP over-expressing mice (Tg-CRP) with two autophagy reporter mouse lines, Tg-GFP-LC3 mice (LC3) and Tg-RFP-GFP-LC3 mice (RG-LC3) respectively to generate Tg-CRP-GFP-LC3 mice (PLC3) and Tg-CRP-RFP-GFP-LC3 mice (PRG-LC3)...
2017: PloS One
https://www.readbyqxmd.com/read/28883900/corrigendum-to-paricalcitol-pretreatment-attenuates-renal-ischemia-reperfusion-injury-via-prostaglandin-e2-receptor-ep4-pathway
#19
Yu Ah Hong, Keum Jin Yang, So Young Jung, Ki Cheol Park, Hyunsu Choi, Jeong Min Oh, Sang Ju Lee, Yoon Kyung Chang, Cheol WheePark, Chul Woo Yang, Suk Young Kim, Hyeon Seok Hwang
[This corrects the article DOI: 10.1155/2017/5031926.].
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28883899/caffeic-acid-phenethyl-ester-reduces-ischemia-induced-kidney-mitochondrial-injury-in-rats
#20
Sonata Trumbeckaite, Neringa Pauziene, Darius Trumbeckas, Mindaugas Jievaltas, Rasa Baniene
During partial nephrectomy, the avoidance of ischemic renal damage is extremely important as duration of renal artery clamping (i.e., ischemia) influences postoperative kidney function. Mitochondria (main producer of ATP in the cell) are very sensitive to ischemia and undergo damage during oxidative stress. Finding of a compound which diminishes ischemic injury to kidney is of great importance. Caffeic acid phenethyl ester (CAPE), biologically active compound of propolis, might be one of the promising therapeutic agents against ischemia-caused damage...
2017: Oxidative Medicine and Cellular Longevity
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