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https://www.readbyqxmd.com/read/27913135/mycophenolate-mofetil-attenuates-uterine-ischaemia-reperfusion-injury-in-a-rat-model
#1
Gulcin Sahin Ersoy, Meryem Kurek Eken, Ozge Cevik, Ozlem T Cilingir, Reshef Tal
This study evaluated the effect of mycophenolate mofetil (MMF) on uterine tissue preservation following ischaemia/reperfusion (I/R) injury. Uterine I/R injury was induced in rats by clamping the lower abdominal aorta and ovarian arteries for 30 min. Group I/R + V (n = 7) received vehicle alone while Group I/R + M (n = 7) received 20 mg/kg/day MMF. Control groups underwent sham surgery and received vehicle (Group C) or 20 mg/kg/day MMF (Group M) (n = 7 for both). Four hours after detorsion, uterine tissue 8-hydroxy-2'-deoxyguanosine (8-OHdG), glutathione, malondialdehyde (MDA), myeloperoxidase (MPO), superoxide dismutase (SOD) and serum ischaemia modified albumin (IMA) concentrations were measured...
November 21, 2016: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/27911703/understanding-and-preventing-mitochondrial-oxidative-damage
#2
REVIEW
Michael P Murphy
Mitochondrial oxidative damage has long been known to contribute to damage in conditions such as ischaemia-reperfusion (IR) injury in heart attack. Over the past years, we have developed a series of mitochondria-targeted compounds designed to ameliorate or determine how this damage occurs. I will outline some of this work, from MitoQ to the mitochondria-targeted S-nitrosating agent, called MitoSNO, that we showed was effective in preventing reactive oxygen species (ROS) formation in IR injury with therapeutic implications...
October 15, 2016: Biochemical Society Transactions
https://www.readbyqxmd.com/read/27902983/perinatal-asphyxia-and-erythropoietin-and-vegf-serial-serum-and-cerebrospinal-fluid-responses
#3
Deirdre U Sweetman, Chike Onwuneme, William R Watson, John F A Murphy, Eleanor J Molloy
BACKGROUND: Infants with neonatal encephalopathy (NE) of hypoxic-ischaemic origin are at risk of oxidative and ischaemia-reperfusion injury, which may induce abnormal inflammatory responses involving excessive cytokine production and release in serum and cerebrospinal fluid (CSF). Systemic inflammation is found in infants with NE, and we therefore were interested in cytokines associated with hypoxia, including vascular endothelial growth factor (VEGF) and erythropoietin (Epo). OBJECTIVE: To investigate the relationship between Epo, VEGF levels, brain injury and outcome in a group of term infants exposed to perinatal asphyxia (PA) compared to controls...
December 1, 2016: Neonatology
https://www.readbyqxmd.com/read/27895419/acute-kidney-injury-and-post-reperfusion-syndrome-in-liver-transplantation
#4
REVIEW
Ilaria Umbro, Francesca Tinti, Irene Scalera, Felicity Evison, Bridget Gunson, Adnan Sharif, James Ferguson, Paolo Muiesan, Anna Paola Mitterhofer
In the past decades liver transplantation (LT) has become the treatment of choice for patients with end stage liver disease (ESLD). The chronic shortage of cadaveric organs for transplantation led to the utilization of a greater number of marginal donors such as older donors or donors after circulatory death (DCD). The improved survival of transplanted patients has increased the frequency of long-term complications, in particular chronic kidney disease (CKD). Acute kidney injury (AKI) post-LT has been recently recognized as an important risk factor for the occurrence of de novo CKD in the long-term outcome...
November 14, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27894590/preconditioning-with-azadirachta-indica-ameliorates-cardiorenal-dysfunction-through-reduction-in-oxidative-stress-and-extracellular-signal-regulated-protein-kinase-signalling
#5
Temidayo Olutayo Omóbòwálé, Ademola Adetokunbo Oyagbemi, Olumuyiwa Abiola Adejumobi, Eguonor Vivian Orherhe, Adetayo Sadudeen Amid, Adeolu Alex Adedapo, Helen Olubukola Nottidge, Momoh Audu Yakubu
BACKGROUND: Azadirachta indica is widely distributed in Africa, Asia and other tropical parts of the world. A.indica (AI) is traditionally used for the treatment of several conditions including cancer, hypertension, heart diseases and skin disorders. Intestinal ischaemia-reperfusion is a common pathway for many diseases and may lead to multiple organ dysfunction syndrome and death. OBJECTIVE: In this study, we investigated the ameliorative effects of AI on intestinal ischaemia-reperfusion injury-induced cardiorenal dysfunction...
November 25, 2016: Journal of Ayurveda and Integrative Medicine
https://www.readbyqxmd.com/read/27884851/influence-of-preinfarction-angina-and-coronary-collateral-blood-flow-on-the-efficacy-of-remote-ischaemic-conditioning-in-patients-with-st-segment-elevation-myocardial-infarction-post-hoc-subgroup-analysis-of-a-randomised-controlled-trial
#6
Kasper Pryds, Morten Bøttcher, Astrid Drivsholm Sloth, Kim Munk, Michael Rahbek Schmidt, Hans Erik Bøtker
OBJECTIVES: Remote ischaemic conditioning (RIC) confers cardioprotection in patients with ST segment elevation myocardial infarction (STEMI) undergoing primary percutaneous coronary intervention (pPCI). We investigated whether preinfarction angina and coronary collateral blood flow (CCBF) to the infarct-related artery modify the efficacy of RIC. DESIGN: Post hoc subgroup analysis of a randomised controlled trial. PARTICIPANTS: A total of 139 patients with STEMI randomised to treatment with pPCI or RIC+pPCI...
November 24, 2016: BMJ Open
https://www.readbyqxmd.com/read/27884032/-acute-kidney-injury-remote-ischaemic-preconditioning-a-nephroprotective-strategy
#7
Melanie Meersch, Alexander Zarbock
Acute kidney injury is a common and serious complication with a huge impact on morbidity and short- as well as long-term mortality. Sepsis and major surgeries, especially cardiac surgery, are the most common causes of acute kidney injury. Slight increases of serum-creatinine levels are associated with adverse outcomes highlighting the relevance of the need for nephroprotective strategies to reduce the occurrence of acute kidney injury. Remote ischaemic preconditioning is an intervention consisting of brief episodes of ischaemia and reperfusion at a remote site before subsequent ischaemic insults occur...
November 2016: Anästhesiologie, Intensivmedizin, Notfallmedizin, Schmerztherapie: AINS
https://www.readbyqxmd.com/read/27868059/intramyocardial-injection-of-sirnas-can-efficiently-establish-myocardial-tissue-specific-renalase-knockdown-mouse-model
#8
Kun Huang, Ju Liu, Hui Zhang, Jiliang Wang, Huili Li
Ischaemia/reperfusion (I/R) injury will cause additional death of cardiomyocytes in ischaemic heart disease. Recent studies revealed that renalase was involved in the I/R injury. So, the myocardial tissue-specific knockdown mouse models were needed for the investigations of renalase. To establish the mouse models, intramyocardial injection of siRNAs targeting renalase was performed in mice. The wild distribution and high transfection efficiency of the siRNAs were approved. And the renalase expression was efficiently suppressed in myocardial tissue...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27842707/-tourniquet-induced-ischaemia-reperfusion-injury-the-comparison-of-antioxidative-effects-of-small-dose-propofol-and-ketamine
#9
Karaca Omer, Gogus Nermin, Ahiskalioglu Ali, Aksoy Mehmet, Dogus Unal, Kumas Solak Sezen, Kalafat Hakan
OBJECTIVES: The aim of the present study was to investigate the preventive effects of propofol and ketamine as small dose sedation during spinal anesthesia on tourniquet-induced ischemia-reperfusion injury. METHODS: Thirty patients were randomly assigned into two groups of fifteen patients. In the propofol group, sedation was performed with propofol 0.2mgkg(-1) followed by infusion at a rate of 2mgkg(-1)h(-1). In the ketamine group, a continuous infusion of ketamine 0...
November 11, 2016: Revista Brasileira de Anestesiologia
https://www.readbyqxmd.com/read/27837380/nedd4-1-protects-against-ischaemia-reperfusion-induced-cardiomyocyte-apoptosis-via-the-pi3k-akt-pathway
#10
Wei Hu, Peng Zhang, Jun Gu, Qiang Yu, Dadong Zhang
Activation of the Akt pathway has been shown to protect the heart from ischaemia/reperfusion (I/R) injury. NEDD4-1 has been shown to positively regulate nuclear trafficking of the activated form of Akt. However, the role of NEDD4-1 in cardiac I/R injury remains to be elucidated. In the present study, Lentiviral vectors were constructed to overexpress or knockdown NEDD4-1 in H9c2 cardiomyocytes subjected to I/R injury or ischemic preconditioning (IPC). The results indicated that NEDD4-1 levels were decreased after I/R and increased after IPC in rat heart tissue and in H9c2 cardiomyocytes...
November 11, 2016: Apoptosis: An International Journal on Programmed Cell Death
https://www.readbyqxmd.com/read/27835640/mass-spectrometry-based-metabolomics-comparison-of-liver-grafts-from-donors-after-circulatory-death-dcd-and-donors-after-brain-death-dbd-used-in-human-orthotopic-liver-transplantation
#11
Olga Hrydziuszko, M Thamara P R Perera, Richard Laing, Jennifer Kirwan, Michael A Silva, Douglas A Richards, Nick Murphy, Darius F Mirza, Mark R Viant
Use of marginal liver grafts, especially those from donors after circulatory death (DCD), has been considered as a solution to organ shortage. Inferior outcomes have been attributed to donor warm ischaemic damage in these DCD organs. Here we sought to profile the metabolic mechanisms underpinning donor warm ischaemia. Non-targeted Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry metabolomics was applied to biopsies of liver grafts from donors after brain death (DBD; n = 27) and DCD (n = 10), both during static cold storage (T1) as well as post-reperfusion (T2)...
2016: PloS One
https://www.readbyqxmd.com/read/27834740/being-right-on-q-shaping-eukaryotic-evolution
#12
REVIEW
Dave Speijer
Reactive oxygen species (ROS) formation by mitochondria is an incompletely understood eukaryotic process. I proposed a kinetic model [BioEssays (2011) 33: , 88-94] in which the ratio between electrons entering the respiratory chain via FADH2 or NADH (the F/N ratio) is a crucial determinant of ROS formation. During glucose breakdown, the ratio is low, while during fatty acid breakdown, the ratio is high (the longer the fatty acid, the higher is the ratio), leading to higher ROS levels. Thus, breakdown of (very-long-chain) fatty acids should occur without generating extra FADH2 in mitochondria...
November 15, 2016: Biochemical Journal
https://www.readbyqxmd.com/read/27807930/human-bone-marrow-mesenchymal-stem-cells-for-retinal-vascular-injury
#13
Jin-Da Wang, Ying An, Jing-Shang Zhang, Xiu-Hua Wan, Jost B Jonas, Liang Xu, Wei Zhang
PURPOSE: To examine the potential of intravitreally implanted human bone marrow-derived mesenchymal stem cells (BMSCs) to affect vascular repair and the blood-retina barrier in mice and rats with oxygen-induced retinopathy, diabetic retinopathy or retinal ischaemia-reperfusion damage. METHODS: Three study groups (oxygen-induced retinopathy group: 18 C57BL/6J mice; diabetic retinopathy group: 15 rats; retinal ischaemia-reperfusion model: 18 rats) received BMSCs injected intravitreally...
November 3, 2016: Acta Ophthalmologica
https://www.readbyqxmd.com/read/27807255/epigallocatechin-3-gallate-protects-against-hepatic-ischaemia-reperfusion-injury-by-reducing-oxidative-stress-and-apoptotic-cell-death
#14
Eunyoung Tak, Gil-Chun Park, Seok-Hwan Kim, Dae Young Jun, Jooyoung Lee, Shin Hwang, Gi-Won Song, Sung-Gyu Lee
OBJECTIVE: To investigate the protective effects of epigallocatechin-3-gallate (EGCG), a major polyphenol source in green tea, against hepatic ischaemia-reperfusion injury in mice. METHODS: The partial hepatic ischaemia-reperfusion injury model was created by employing the hanging-weight method in C57BL/6 male mice. EGCG (50 mg/kg) was administered via an intraperitoneal injection 45 min before performing the reperfusion. A number of markers of inflammation, oxidative stress, apoptosis and liver injury were measured after the ischaemia-reperfusion injury had been induced...
November 1, 2016: Journal of International Medical Research
https://www.readbyqxmd.com/read/27804287/a-novel-fluorescent-nanocomposite-for-visualizing-cross-talk-between-microrna-21-and-hydrogen-peroxide-in-ischaemia-reperfusion-injury-in-live-cells-and-in-vivo
#15
Limin Yang, Yanfei Ren, Wei Pan, Zhengze Yu, Lili Tong, Na Li, Bo Tang
MicroRNAs (miRNAs) and reactive oxygen species (ROS) are concurrently implicated in heart ischemia-reperfusion (IR) injury. There may exist mutual cross-talk between miRNAs and ROS in cardiac IR injury process. In this study, we developed a novel crown-like silica@polydopamine-DNA-CeO2 nanocomposite by assembly of silica@polydopamine-DNA1 nanoparticles decorated with satellite CeO2-DNA2 nanoparticles for detecting and imaging of microRNA-21 (miR-21) and hydrogen peroxide (H2O2) in simulated IR injury in living cells and in vivo...
November 2, 2016: Analytical Chemistry
https://www.readbyqxmd.com/read/27801527/hif-1%C3%AE-triggers-long-lasting-glutamate-excitotoxicity-via-system-xc-in-cerebral-ischaemia-reperfusion
#16
Chia-Hung Hsieh, Yu-Jung Lin, Wei-Ling Chen, Yen-Chih Huang, Chi-Wei Chang, Fu-Chou Cheng, Ren-Shyan Liu, Woei-Cherng Shyu
Hypoxia-inducible factor 1α (HIF-1α) controls many genes involved in physiological and pathological processes. However, its roles in glutamatergic transmission and excitotoxicity are unclear. Here, we proposed that HIF-1α might contribute to glutamate-mediated excitotoxicity during cerebral ischaemia-reperfusion (CIR) and investigated its molecular mechanism. We showed that an HIF-1α conditional knockout mouse displayed an inhibition in CIR-induced elevation of extracellular glutamate and N-methyl-D-aspartate receptor (NMDAR) activation...
November 1, 2016: Journal of Pathology
https://www.readbyqxmd.com/read/27789786/non-invasive-near-infrared-fluorescence-imaging-of-the-neutrophil-response-in-a-mouse-model-of-transient-cerebral-ischaemia
#17
Markus Vaas, Gaby Enzmann, Therese Perinat, Ulrich Siler, Janine Reichenbach, Kai Licha, Anja Kipar, Markus Rudin, Britta Engelhardt, Jan Klohs
Near-infrared fluorescence (NIRF) imaging enables non-invasive monitoring of molecular and cellular processes in live animals. Here we demonstrate the suitability of NIRF imaging to investigate the neutrophil response in the brain after transient middle cerebral artery occlusion (tMCAO). We established procedures for ex vivo fluorescent labelling of neutrophils without affecting their activation status. Adoptive transfer of labelled neutrophils in C57BL/6 mice before surgery resulted in higher fluorescence intensities over the ischaemic hemisphere in tMCAO mice with NIRF imaging when compared with controls, corroborated by ex vivo detection of labelled neutrophils using fluorescence microscopy...
October 27, 2016: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/27786339/antithrombin-is-not-protective-against-renal-ischaemia-reperfusion-injury
#18
Yasmine Bourti, François Saller, Elsa P Bianchini, Stéphane Pautus, Jean-Paul Duong van Huyen, Anne-Lise Marie, N Thuy Tran, Thierry Jo Molina, Myriam Taverna, Nicolas Lerolle, Delphine Borgel
No abstract text is available yet for this article.
October 27, 2016: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/27785882/naoxintong-attenuates-ischaemia-reperfusion-injury-through-inhibiting-nlrp3-inflammasome-activation
#19
Yaqiong Wang, Xiaoxiang Yan, Shouling Mi, Zhang Li, Yuexiang Wang, Hong Zhu, Xiaolei Sun, Buchang Zhao, Chao Zhao, Yunzeng Zou, Kai Hu, Xiaoqiang Ding, Aijun Sun, Junbo Ge
Naoxintong (NXT) is a Chinese Materia Medica standardized product extracted from 16 various kinds of Chinese traditional herbal medicines including Salvia miltiorrhiza, Angelica sinensis, Astragali Radix. Naoxintong is clinically effective in treating ischaemia heart disease. Nucleotide-binding oligomerization domain-Like Receptor with a Pyrin domain 3 (NLRP3) inflammasome has been critically involved in myocardial ischaemia/reperfusion (I/R) injury. Here, we have been suggested that NXT might attenuate myocardial I/R injury via suppression of NLRP3 inflammasome activation...
October 26, 2016: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/27778091/delayed-graft-function-and-its-management-in-children
#20
Ryszard Grenda
Delayed graft function (DGF) is commonly defined as the requirement for dialysis within the first 7 days following renal transplantation. The major underlying mechanism is related to ischaemia/reperfusion injury, which includes microvascular inflammation and cell death and apoptosis, and to the regeneration processes. Several clinical factors related to donor, recipient and organ procurement/transplantation procedures may increase the risk of DGF, including donor cardiovascular instability, older donor age, donor creatinine concentration, long cold ischaemia time and marked body mass index of both the donor and recipient...
October 24, 2016: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
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