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Ischemia reperfusion injury

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https://www.readbyqxmd.com/read/28742516/prevention-of-renal-ischemia-perfusion-induced-renal-and-hepatic-injury-in-adult-male-albino-rats-by-oxytocin-role-of-nitric-oxide
#1
Merhan Mamdouh Ragy, Neven Makram Aziz
BACKGROUND: Oxytocin (OT) has an anti-inflammatory and antioxidant effect in the different inflammatory models. The current study aimed to evaluate the protective function of OT in renal and hepatic damages triggered by renal ischemia/reperfusion (IR) in rats. Moreover, the effect of NG-nitro-l-arginine methyl ester (l-NAME) was investigated on the kidney and liver functions in renal IR model. METHODS: Twenty-four rats were divided into four groups (six rats each) as follows: (1) Sham-operated group; (2) Renal IR group; (3) Renal IR+OT group; (4) Renal IR+OT+l-NAME...
July 25, 2017: Journal of Basic and Clinical Physiology and Pharmacology
https://www.readbyqxmd.com/read/28742158/human-tamm-horsfall-protein-a-renal-specific-protein-serves-as-a-cofactor-in-complement-3b-degradation
#2
Diana C J Rhodes
Tamm-Horsfall protein (THP) is an abundant urinary protein of renal origin. We hypothesize that THP can act as an inhibitor of complement since THP binds complement 1q (C1q) of the classical complement pathway, inhibits activation of this pathway, and is important in decreasing renal ischemia-reperfusion injury (a complement-mediated condition). In this study, we began to investigate whether THP interacted with the alternate complement pathway via complement factor H (CFH). THP was shown to bind CFH using ligand blots and in an ELISA (KD of 1 × 10-6 M)...
2017: PloS One
https://www.readbyqxmd.com/read/28739531/oxidative-and-er-stress-dependent-ask1-activation-in-steatotic-hepatocytes-and-kupffer-cells-sensitizes-mice-fatty-liver-to-ischemia-reperfusion-injury
#3
Chiara Imarisio, Elisa Alchera, Bangalore R Chandrashekar, Guido Valente, Antonia Follenzi, Elena Trisolini, Renzo Boldorini, Rita Carini
Steatosis intensifies hepatic ischemia/reperfusion (I/R) injury increasing hepatocyte damage and hepatic inflammation. This study evaluates if this process is associated to a differential response of steatotic hepatocytes (HP) and Kupffer cells (KC) to I/R injury and investigates the molecular mechanisms involved. Control or steatotic (treated with 50 μmol palmitic acid, PA) mouse HP or KC were exposed to hypoxia/reoxygenation (H/R). C57BL/6 mice fed 9 week with control or High Fat diet underwent to partial hepatic IR...
July 21, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28739141/amp-activated-protein-kinase-myocardin-related-transcription-factor-a-signaling-regulates-fibroblast-activation-and-renal-fibrosis
#4
Yuguo Wang, Li Jia, Zhaoyong Hu, Mark L Entman, William E Mitch, Yanlin Wang
Chronic kidney disease is a major cause of death, and renal fibrosis is a common pathway leading to the progression of this disease. Although activated fibroblasts are responsible for the production of the extracellular matrix and the development of renal fibrosis, the molecular mechanisms underlying fibroblast activation are not fully defined. Here we examined the functional role of AMP-activated protein kinase (AMPK) in the activation of fibroblasts and the development of renal fibrosis. AMPKα1 was induced in the kidney during the development of renal fibrosis...
July 21, 2017: Kidney International
https://www.readbyqxmd.com/read/28739088/trimucrin-an-arg-gly-asp-containing-disintegrin-attenuates-myocardial-ischemia-reperfusion-injury-in-murine-by-inhibiting-platelet-function
#5
Yu-Chun Hung, Yu-Ju Kuo, Shiang-Suo Huang, Tur-Fu Huang
Trimucrin, a novel small-mass Arg-Gly-Asp (RGD)-containing disintegrin, has been demonstrated to possess anti-platelet and anti-inflammatory effect through blockade of platelet αIIbβ3 and phagocyte αvβ3 integrin. In this study, we found that the platelet-rich plasma prepared from trimucrin-treated rats platelet aggregation was diminished in response to adenosine diphosphate (ADP). We tried to determine whether trimucrin is cardioprotective in rats subjected to myocardial ischemia-reperfusion (I-R) injury...
July 21, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28738537/phosphodiesterase-inhibitor-ameliorates-neuronal-injury-in-spinal-cord-ischemia-reperfusion-injured-rat-model
#6
Xiao-Gang Chen, Fu Hua, Shou-Guo Wang, Yong-Yi Xu, Hai-Tao Yue
This study investigated the mechanisms responsible for the neuroprotective effect of sildenafil citrate (SFC) on ischemia-reperfusion spinal cord (SC) injuries. Balloon occlusion of the thoracic aorta was used to induce SC ischemia. The animals (n=30) were separated into three groups: sham, SC injury with saline, and SC injury with 5mg/kg i.p. SFC treatment (SFC). The Basso, Beattie, and Bresnahan (BBB) score was determined to assess neurological function at different time intervals after reperfusion. After 48h, histopathology of the SC was assessed by triphenyltetrazolium chloride (TTC) and Nissl staining...
July 20, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28738006/effect-of-lidocaine-on-inflammation-in-equine-jejunum-subjected-to-manipulation-only-and-remote-to-intestinal-segments-subjected-to-ischemia
#7
Anje G Bauck, Astrid Grosche, Alison J Morton, A Sarah Graham, Thomas W Vickroy, David E Freeman
OBJECTIVE To examine effects of continuous rate infusion of lidocaine on transmural neutrophil infiltration in equine intestine subjected to manipulation only and remote to ischemic intestine. ANIMALS 14 healthy horses. PROCEDURES Ventral midline celiotomy was performed (time 0). Mild ischemia was induced in segments of jejunum and large colon. A 1-m segment of jejunum was manipulated by massaging the jejunal wall 10 times. Horses received lidocaine (n = 7) or saline (0.9% NaCl) solution (7) throughout anesthesia...
August 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28737710/cytoprotective-effect-of-the-ucp2-sirt3-signaling-pathway-by-decreasing-mitochondrial-oxidative-stress-on-cerebral-ischemia-reperfusion-injury
#8
REVIEW
Jing Su, Jie Liu, Xiao-Yu Yan, Yong Zhang, Juan-Juan Zhang, Li-Chao Zhang, Lian-Kun Sun
Recovered blood supply after cerebral ischemia for a certain period of time fails to restore brain function, with more severe dysfunctional problems developing, called cerebral ischemia-reperfusion injury (CIR). CIR involves several extremely complex pathophysiological processes in which the interactions between key factors at various stages have not been fully elucidated. Mitochondrial dysfunction is one of the most important mechanisms of CIR. The mitochondrial deacetylase, sirtuin 3 (SIRT3), can inhibit mitochondrial oxidative stress by deacetylation, to maintain mitochondrial stability...
July 24, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28737660/renal-protection-mediated-by-hypoxia-inducible-factor-1%C3%AE-depends-on-proangiogenesis-function-of-mir-21-by-targeting-thrombospondin-1
#9
Xialian Xu, Nana Song, Xue Zhang, Xiaoyan Jiao, Jiachang Hu, Mingyu Liang, Jie Teng, Xiaoqiang Ding
BACKGROUND: Angiogenesis contributes to the repair process after renal ischemia/reperfusion (I/R) injury. In the present study, we tested the role of miR-21 in the angiogenesis induced by hypoxia inducible factor (HIF)-1α through inhibiting a predicted target gene thrombospondin 1 (TSP-1). METHODS: To stabilize HIF-1α, hypoxia (1% O2 for 24 hours) was performed in human umbilical vein endothelial cells and cobalt chloride (CoCl2) was pretreated intraperitoneally 24 hours before renal I/R in mice...
August 2017: Transplantation
https://www.readbyqxmd.com/read/28737133/pretreatment-with-paricalcitol-attenuates-level-and-expression-of-matrix-metalloproteinases-in-a-rat-model-of-renal-ischemia-reperfusion-injury%C3%A2
#10
Sibel Ersan, Asli Celik, Mehmet Tanrisev, Isil Kose, Zahide Cavdar, Mehtat Unlu, Ayse Kocak, Cemre Ural, Banu Yilmaz, Timur Kose
BACKGROUND: Ischemia-reperfusion injury (IRI) is a leading cause of acute kidney injury (AKI). The inflammatory response that drives IRI involves upregulation of matrix metalloproteinases (MMPs), which results in proteolytic degradation of renal microvascular matrix. Evidence suggests a potential protective role of active vitamin D on ischemic injury by downregulating MMPs. In the present study, we aimed to determine the expression and level of MMP-2 and MMP-9 in renal IRI model and the potential beneficial effect of paricalcitol on both level and expression of MMPs and tubular injury caused by IRI...
July 24, 2017: Clinical Nephrology
https://www.readbyqxmd.com/read/28736742/unique-morphological-characteristics-of-mitochondrial-subtypes-in-the-heart-the-effect-of-ischemia-and-ischemic-preconditioning
#11
Siavash Beikoghli Kalkhoran, Peter Munro, Fan Qiao, Sang-Bing Ong, Andrew R Hall, Hector Cabrera-Fuentes, Bibhas Chakraborty, William A Boisvert, Derek M Yellon, Derek J Hausenloy
RATIONALE: Three subsets of mitochondria have been described in adult cardiomyocytes - intermyofibrillar (IMF), subsarcolemmal (SSM), and perinuclear (PN). They have been shown to differ in physiology, but whether they also vary in morphological characteristics is unknown. Ischemic preconditioning (IPC) is known to prevent mitochondrial dysfunction induced by acute myocardial ischemia/reperfusion injury (IRI), but whether IPC can also modulate mitochondrial morphology is not known. AIMS: Morphological characteristics of three different subsets of adult cardiac mitochondria along with the effect of ischemia and IPC on mitochondrial morphology will be investigated...
January 2017: Discoveries
https://www.readbyqxmd.com/read/28736260/soluble-epoxide-hydrolase-activation-by-s-nitrosation-contributes-to-cardiac-ischemia-reperfusion-injury
#12
Yuzhu Ding, Yazi Li, Xu Zhang, Jinlong He, Dong Lu, Xuan Fang, Yuchen Wang, Jiaxing Wang, Yuying Zhang, Xinhua Qiao, Li-Ming Gan, Chang Chen, Yi Zhu
Cardiac ischemia-reperfusion (I/R) injury always accompanies recanalization treatment for myocardial infarction. Here we found soluble epoxide hydrolase (sEH), which metabolizes cardioprotective epoxyeicosatrienoic acids into less effective diols, was rapidly activated during myocardial reperfusion in both mouse and rat models in expression-independent manner. Similar activation was mimicked by nitric oxide (NO) donor dose-dependently in vitro, along with an obvious induction of sEH S-nitrosation, a short-term post-translational modification, which diminished in sEH Cys-141-Ala mutant...
July 20, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28736181/succinate-accumulation-impairs-cardiac-pyruvate-dehydrogenase-activity-through-grp91-dependent-and-independent-signaling-pathways-therapeutic-effects-of-ginsenoside-rb1
#13
Jia Li, Yi-Lin Yang, Lan-Zhu Li, Lei Zhang, Qun Liu, Kang Liu, Ping Li, Baolin Liu, Lian-Wen Qi
Altered mitochondrial oxidation increases vulnerability to cardiac ischemia/reperfusion (I/R) injury in metabolic disorders. However, the metabolic signaling responsible for the dysfunction remains partly unknown. We sought to test whether or not hypoxic succinate accumulation could inhibit pyruvate dehydrogenase (PDH) activity and subsequently aggravate I/R injury. Results showed that saturated fatty acid palmitate stimulation increased fatty acid oxidation and induced hypoxia in cardiomyocytes, leading to succinate accumulation...
July 20, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28736035/propane-2-sulfonic-acid-octadec-9-enyl-amide-a-novel-ppar%C3%AE-%C3%AE-dual-agonist-protects-against-ischemia-induced-brain-damage-in-mice-by-inhibiting-inflammatory-responses
#14
Ying Li, Lanxi Xu, Kaiyue Zeng, Zhentian Xu, Daqin Suo, Lu Peng, Tong Ren, Zhiheng Sun, Wushuang Yang, Xin Jin, Lichao Yang
Propane-2-sulfonic acid octadec-9-enyl-amide (N15), an analogue of oleoylethanolamide (OEA), is a novel PPARα/γ dual agonist. Our previous studies verified the positive effects of OEA on the acute and delayed stages of cerebral ischemia. However, it is not clear whether N15 is effective against ischemic cerebral injury. In the present study, male Kunming mice were subjected to middle cerebral artery occlusion (MCAO). To evaluate its preventive effects, N15 (50, 100 or 200 mg/kg, ip) was administered for 3 days before ischemia...
July 20, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28736024/effects-of-sildenafil-and-tadalafil-on-edema-and-reactive-oxygen-species-production-in-an-experimental-model-of-lung-ischemia-reperfusion-injury
#15
J R Guerra-Mora, E Perales-Caldera, D Aguilar-León, C Nava-Sanchez, A Díaz-Cruz, N E Díaz-Martínez, P Santillán-Doherty, G Torres-Villalobos, C C Bravo-Reyna
BACKGROUND: Lung ischemia-reperfusion injury is characterized by formation of reactive oxygen species and cellular swelling leading to pulmonary edema and primary graft dysfunction. Phosphodiesterase 5 inhibitors could ameliorate lung ischemia-reperfusion injury by interfering in many molecular pathways. The aim of this work was to evaluate and compare the effects of sildenafil and tadalafil on edema and reactive oxygen species formation in an ex vivo nonhuman animal model of lung ischemia-reperfusion injury...
July 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28736023/protective-effects-of-geniposide-on-hepatic-ischemia-reperfusion-injury
#16
Y-P Rong, H-T Huang, J-S Liu, L Wei
BACKGROUND: Geniposide (GEN) is the major ingredient of Gardenia jasminoides Ellis, which has anti-inflammatory and anti-apoptotic activities and is widely used to treat ischemia disease. Inflammation and apoptosis play an important role in hepatic ischemia/reperfusion (I/R) injury. The current study was conducted to explore the effects of geniposide on hepatic I/R injury and its potential molecular mechanism in mice. METHODS: Fifty Sprague-Dawley rats were randomly divided into 5 groups: the sham group (sham), the hepatic I/R injury group (IRI) and the GEN groups (low, middle, and high)...
July 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28736003/kidney-graft-salvage-strategies-for-vascular-complications-during-kidney-transplantation-a-single-center-experience
#17
P Horvath, I Capobianco, J Rolinger, A Königsrainer, S Nadalin, I Königsrainer
BACKGROUND: Kidney-related unknown vascular injuries are rare and usually diagnosed only after reperfusion. Hemorrhage that makes in situ reconstruction impossible can lead to graft loss. In an era of organ shortage and an increasing number of patients on the waiting list for transplantation, a kidney graft salvage procedure consisting of graft nephrectomy, reperfusion, reconstruction, and reimplantation should be undertaken whenever possible as a contribution to extending the organs available for transplantation...
July 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28735834/retraction-notice-to-secretory-pathway-ca-2-atpase-isoform-1-knockdown-promotes-golgi-apparatus-stress-injury-in-a-mouse-model-of-focal-cerebral-ischemia-reperfusion-in-vivo-and-in-vitro-study-brain-res-1642-2016-189-196
#18
Yongmei Fan, Changjie Zhang, Wenna Peng, Ting Li, Jing Yin, Ying Kong, Chunna Lan, Xiaofang Li, Rumi Wang, Zhiping Hu
No abstract text is available yet for this article.
September 1, 2017: Brain Research
https://www.readbyqxmd.com/read/28735097/protecting-the-heart-through-mk2-modulation-toward-a-role-in-diabetic-cardiomyopathy-and-lipid-metabolism
#19
REVIEW
Matthieu Ruiz, Lise Coderre, Bruce Gordon Allen, Christine Des Rosiers
Various signaling pathways have been identified in the heart as important players during development, physiological adaptation or pathological processes. This includes the MAPK families, particularly p38MAPK, which is involved in several key cellular processes, including differentiation, proliferation, apoptosis, inflammation, metabolism and survival. Disrupted p38MAPK signaling has been associated with several diseases, including cardiovascular diseases (CVD) as well as diabetes and its related complications...
July 19, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28734929/aripiprazole-prevents-renal-ischemia-reperfusion-injury-in-rats-probably-through-nitric-oxide-involvement
#20
Hanieh Gholampour, Leila Moezi, Hamed Shafaroodi
Renal ischemia/reperfusion (I/R) injury is strongly related to morbidity and mortality. Oxidative stress, inflammation, and apoptosis play key roles in renal dysfunction following renal I/R. Aripiprazole is an atypical antipsychotic which used for the treatment of schizophrenia and bipolar disorder. Recent studies have reported aripiprazole as displaying certain anti-inflammatory effects. Regarding the underlying mechanisms of renal ischemia-reperfusion, therefore, nephroprotective effects might be predicted to be seen with aripiprazole...
July 19, 2017: European Journal of Pharmacology
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