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Reperfusion injury

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https://www.readbyqxmd.com/read/29150436/microvesicles-derived-from-human-wharton-s-jellymesenchymal-stem-cells-ameliorate-ischemia-reperfusion-induced-renal-fibrosis-by-releasing-from-g2-m-cell-cycle-arrest
#1
Wenxia Chen, Yongbin Yan, Chundong Song, Ying Ding, Tao Du
Studies have demonstrated that microvesicles (MVs) derived from human Wharton's Jelly mesenchymal stromal cells (hWJMSCs) could ameliorate renal ischemia/reperfusion injury (IRI), however, the underlying mechanisms were not clear yet. Here, MVs were isolated and injected intravenously into rats immediately after ischemia of the left kidney, and Erk1/2 activator HGF or inhibitor U0126 was administrated, respectively. Tubular cell proliferation and apoptosis were identified by Ki67 or TUNEL immunostaining. Masson's tri-chrome straining and alpha-smooth muscle actin (α -SMA) staining were used for assessing renal fibrosis...
November 17, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/29149981/ischemic-preconditioning-produces-comparable-protection-against-hepatic-ischemia-reperfusion-injury-under-isoflurane-and-sevoflurane-anesthesia-in-rats
#2
J S Jeong, D Kim, K Y Kim, S Ryu, S Han, B S Shin, G S Kim, M S Gwak, J S Ko
BACKGROUND: Various volatile anesthetics and ischemic preconditioning (IP) have been demonstrated to exert protective effect against ischemia/reperfusion (I/R) injury in liver. We aimed to determine whether application of IP under isoflurane and sevoflurane anesthesia would confer protection against hepatic I/R injury in rats. METHODS: Thirty-eight rats weighing 270 to 300 grams were randomly divided into 2 groups: isoflurane (1.5%) and sevoflurane (2.5%) anesthesia groups...
November 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/29149759/dusp1-alleviates-cardiac-ischemia-reperfusion-injury-by-suppressing-the-mff-required-mitochondrial-fission-and-bnip3-related-mitophagy-via-the-jnk-pathways
#3
Qinhua Jin, Ruibing Li, Nan Hu, Ting Xin, Pingjun Zhu, Shunying Hu, Sai Ma, Hong Zhu, Jun Ren, Hao Zhou
Mitochondrial fission and selective mitochondrial autophagy (mitophagy) form an essential axis of mitochondrial quality control that plays a critical role in the development of cardiac ischemia-reperfusion (IR) injury. However, the precise upstream molecular mechanism of fission/mitophagy remains unclear. Dual-specificity protein phosphatase1 (DUSP1) regulates cardiac metabolism, but its physiological contribution in the reperfused heart, particularly its influence on mitochondrial homeostasis, is unknown. Here, we demonstrated that cardiac DUSP1 was downregulated following acute cardiac IR injury...
November 6, 2017: Redox Biology
https://www.readbyqxmd.com/read/29149095/proton-nuclear-magnetic-resonance-%C3%A2-h-nmr-based-metabolomic-evaluation-of-human-renal-allografts-from-donations-after-circulatory-death
#4
Zijie Wang, Haiwei Yang, Chunchun Zhao, Jifu Wei, Junsong Wang, Zhijian Han, Jun Tao, Zhen Xu, Xiaobin Ju, Ruoyun Tan, Min Gu
BACKGROUND Delayed graft function (DGF) is a common complication that impairs allograft function after kidney transplantation. However, the mechanism of DGF remains unclear. Nuclear magnetic resonance (NMR)-based analysis has been widely used in recent times to assess changes in metabolite levels. MATERIAL AND METHODS Samples of perfusate from allografts donated after circulatory death were collected prior to transplantation, during static cold storage. ¹H-NMR-based metabolomics combined with the statistical methods, orthogonal partial least-squares discriminant analysis (OPLS-DA), and principle-component analysis (PCA), were employed to test different levels of metabolites between the allografts that exhibited DGF and those that exhibited immediate graft function (IGF)...
November 17, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29148253/quantification-of-vascular-damage-in-acute-kidney-injury-with-fluorine-magnetic-resonance-imaging-and-spectroscopy
#5
Jeremy K Moore, Junjie Chen, Hua Pan, Joseph P Gaut, Sanjay Jain, Samuel A Wickline
PURPOSE: To design a fluorine MRI/MR spectroscopy approach to quantify renal vascular damage after ischemia-reperfusion injury, and the therapeutic response to antithrombin nanoparticles (NPs) to protect kidney function. METHODS: A total of 53 rats underwent 45 min of bilateral renal artery occlusion and were treated at reperfusion with either plain perfluorocarbon NPs or NPs functionalized with a direct thrombin inhibitor (PPACK:phenyalanine-proline-arginine-chloromethylketone)...
November 16, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29147904/the-multifaceted-roles-of-dj-1-as-an-antioxidant
#6
Prahlad V Raninga, Giovanna Di Trapani, Kathryn F Tonissen
The DJ-1 protein was originally linked with Parkinson's disease and is now known to have antioxidant functions. The protein has three redox-sensitive cysteine residues, which are involved in its dimerisation and functional properties. A mildly oxidised form of DJ-1 is the most active form and protects cells from oxidative stress conditions. DJ-1 functions as an antioxidant through a variety of mechanisms, including a weak direct antioxidant activity by scavenging reactive oxygen species. DJ-1 also regulates a number of signalling pathways, including the inhibition of apoptosis signal-regulating kinase 1 (ASK1)-induced apoptosis under oxidative stress conditions...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29147494/renoprotective-effect-of-crocin-following-liver-ischemia-reperfusion-injury-in-wistar-rats
#7
Seyyed Ali Mard, Ghaidafeh Akbari, Esrafil Mansouri, Mahdi Parsanahad
Objectives: The objectives of the current study were to evaluate the effects of hepatic ischemia/reperfusion (IR) injury on the activity of antioxidant enzymes, biochemical factors, and histopathological changes in rat kidney, and to investigate the effect of crocin on IR-related changes. Materials and Methods: Thirty-two male Wistar rats were randomly allocated into four groups (n=8). They were sham-operated, IR, crocin pre-treatment, and crocin pretreatment+IR groups...
October 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/29147482/combined-postconditioning-with-ischemia-and-cyclosporine-a-restore-oxidative-stress-and-histopathological-changes-in-reperfusion-injury-of-diabetic-myocardium
#8
Reza Badalzadeh, Seyed Mahmoud Tabatabaei, Mustafa Mohammadi, Arash Khaki, Dariush Mohammadnezhad
Objectives: Chronic diabetes impedes cardioprotection in reperfusion injury and hence protecting the diabetic heart would have important outcomes. In this study, we evaluated whether combined postconditioning with ischemia and cyclosporine-A can restore oxidative stress and histopathological changes in reperfusion injury of the diabetic myocardium. Materials and Methods: Streptozocin-induced diabetic hearts and nondiabetic controls in eight subgroups (with or without receiving ischemic-postconditioning (IPostC), cyclosporine-A, an inhibitor of mitochondrial permeability transition, or both of them) suffered from 30 min regional ischemia followed by 45 min reperfusion on an isolated-heart Langendorff system...
October 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/29145879/allogeneic-mesenchymal-stem-cell-as-induction-therapy-to-prevent-both-delayed-graft-function-and-acute-rejection-in-deceased-donor-renal-transplantation-study-protocol-for-a-randomized-controlled-trial
#9
Qipeng Sun, Liangqing Hong, Zhengyu Huang, Ning Na, Xuefeng Hua, Yanwen Peng, Ming Zhao, Ronghua Cao, Qiquan Sun
BACKGROUND: Using kidneys from deceased donors is an available strategy to meet the growing need of grafts. However, higher incidences of delayed graft function (DGF) and acute rejection exert adverse effects on graft outcomes. Since ischemia-reperfusion injury (IRI) and ongoing process of immune response to grafts are the major causes of DGF and acute rejection, the optimal induction intervention should possess capacities of both repairing renal structure injury and suppressing immune response simultaneously...
November 16, 2017: Trials
https://www.readbyqxmd.com/read/29145424/levosimendan-protects-human-hepatocytes-from-ischemia-reperfusion-injury
#10
Stefanie N Brunner, Nicolai V Bogert, Andreas A Schnitzbauer, Eva Juengel, Anton Moritz, Isabella Werner, Angela Kornberger, Andres Beiras-Fernandez
BACKGROUND: Ischemia-reperfusion injury (IRI) is a major challenge in liver transplantation. The mitochondrial pathway plays a pivotal role in hepatic IRI. Levosimendan, a calcium channel sensitizer, was shown to attenuate apoptosis after IRI in animal livers. The aim of this study was to investigate the effect of levosimendan on apoptosis in human hepatocytes. METHODS: Primary human hepatocytes were either exposed to hypoxia or cultured under normoxic conditions...
2017: PloS One
https://www.readbyqxmd.com/read/29145340/open-repair-of-intraoperative-popliteal-artery-injury-during-total-knee-arthroplasty-in-a-patient-with-severe-hemophilia-a-a-case-report-and-literature-review
#11
Bin Feng, Ke Xiao, Jiang Shao, Yu Fan, Xisheng Weng
RATIONALE: Arterial injuries during total knee arthroplasty (TKA) though rare may occur. Hemophilia may further challenge the management of such injury. PATIENT CONCERNS: A 48-year-old male patient with severe hemophilia type A and stiff knee arthropathy underwent bilateral TKAs. Left popliteal artery injury was detected at the end of the left TKA. DIAGNOSES: Urgent angiography confirmed the diagnosis of the left popliteal artery transection...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29144770/equine-intestinal-mucosal-pathobiology
#12
Anthony Blikslager, Liara Gonzalez
The equine intestinal mucosa is intimately involved in maintaining homeostasis both on a systemic level by controlling extracellular fluid movement and at the local level to maintain barrier function. Horses are particularly susceptible to the clinical syndrome of colic, with the most severe cases involving strangulating obstruction that induces ischemia. Because of the mucosal vascular architecture, the mucosal epithelium is particularly susceptible to ischemic injury. The potential for reperfusion injury has been investigated and found to play a minimal role...
November 16, 2017: Annual Review of Animal Biosciences
https://www.readbyqxmd.com/read/29144016/what-is-the-protective-effect-of-metformin-on-rat-ovary-against-ischemia-reperfusion-injury
#13
Cemile Dayangan Sayan, Gokhan Karaca, Zehra Sema Ozkan, Ozlem B Tulmac, Aslı Ceylan Isik, Tuba Devrim, Gülcin Aydin, Ilkin Yeral
AIM: The aim of this study was to investigate the protective effect of metformin on the rat ovary against ischemia-reperfusion injury. METHODS: Thirty-seven female Wistar albino rats were used in the study. The rats were divided into five groups, as follows: sham operation group (group 1); torsion group (group 2); torsion/detorsion + saline group (group 3); torsion/detorsion + low-dose metformin group (group 4); and torsion/detorsion + high-dose metformin group (group 5)...
November 16, 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/29143976/stat3-atg5-signal-axis-inducing-autophagy-to-alleviate-hepatic-ischemia-reperfusion-injury
#14
Yu-Fang Han, Yan-Bing Zhao, Jun Li, Li Li, Yong-Gan Li, Shi-Peng Li, Zhong-Dong Li
In performing our experiment, impaired autophagy increased hepatocellular damage during the reperfusion period. It was demonstrated by the effect of blocking autophagy using bafilomycin A1 or knocking Atg5 gene out reduces the anti-apoptotic effect of Stat3. Here we focus on the role of signal transducer and activator of transcription 3 (Stat3) in regulating autophagy to alleviate hepatic IRI. We found that Stat3 was up-regulated during hepatic IRI and was associated with an activation of the autophagic signaling pathway...
November 16, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29143812/the-nlrp3-inflammasome-in-acute-myocardial-infarction
#15
REVIEW
Stefano Toldo, Antonio Abbate
The heart is extremely sensitive to ischaemic injury. During an acute myocardial infarction (AMI) event, the injury is initially caused by reduced blood supply to the tissues, which is then further exacerbated by an intense and highly specific inflammatory response that occurs during reperfusion. Numerous studies have highlighted the central role of the NACHT, LRR, and PYD domains-containing protein 3 (NLRP3) inflammasome in this process. The inflammasome, an integral part of the innate immune system, is a macromolecular protein complex that finely regulates the activation of caspase 1 and the production and secretion of powerful pro-inflammatory cytokines such as IL-1β and IL-18...
November 16, 2017: Nature Reviews. Cardiology
https://www.readbyqxmd.com/read/29143177/the-risk-pathway-and-beyond
#16
REVIEW
Xavier Rossello, Derek M Yellon
Research on cardioprotection has attracted considerable attention during the past 30 years following the discovery of ischemic preconditioning with great advances being made in the field, particularly in the description of the molecular signalling behind this cardioprotective intervention. In a time when basic research is struggling to translate its findings into therapies in the clinical setting, this viewpoint has the intention of presenting to clinical and basic scientists how the reperfusion injury salvage kinase pathway has been described and dissected, as well as highlighting its relevance in cardioprotection...
November 15, 2017: Basic Research in Cardiology
https://www.readbyqxmd.com/read/29142491/impact-of-remote-ischemic-postconditioning-during-primary-percutaneous-coronary-intervention-on-left-ventricular-remodeling-after-anterior-wall-st-segment-elevation-myocardial-infarction-a-single-center-experience
#17
Ayman Elbadawi, Omar Awad, Ramy Raymond, Haytham Badran, Ahmad E Mostafa, Marwan Saad
The role of remote ischemic postconditioning (RIPostC) in improving left ventricular (LV) remodeling after primary percutaneous coronary intervention (PCI) is not well established. To determine the efficacy and safety of RIPostC in improving LV remodeling and cardiovascular outcomes after primary PCI for anterior ST-elevation myocardial infarction (STEMI). Seventy-one patients with anterior STEMI were randomized to primary PCI with RIPostC protocol ( n  = 36) versus conventional primary PCI ( n  = 35)...
December 2017: International Journal of Angiology: Official Publication of the International College of Angiology, Inc
https://www.readbyqxmd.com/read/29142050/collectin-11-promotes-the-development-of-renal-tubulointerstitial-fibrosis
#18
Weiju Wu, Chengfei Liu, Conrad A Farrar, Liang Ma, Xia Dong, Steven H Sacks, Ke Li, Wuding Zhou
Collectin-11 is a recently described soluble C-type lectin, a pattern recognition molecule of the innate immune system that has distinct roles in host defense, embryonic development, and acute inflammation. However, little is known regarding the role of collectin-11 in tissue fibrosis. Here, we investigated collectin-11 in the context of renal ischemia-reperfusion injury. Compared with wild-type littermate controls, Collec11 deficient (CL-11(-/-) ) mice had significantly reduced renal functional impairment, tubular injury, renal leukocyte infiltration, renal tissue inflammation/fibrogenesis, and collagen deposition in the kidneys after renal ischemia-reperfusion injury...
November 15, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/29142025/cardioprotection-of-dapagliflozin-and-vildagliptin-in-cardiac-reperfusion-injury-rats
#19
Pongpan Tanajak, Piangkwan Sa-Nguanmoo, Sivaporn Sivasinprasan, Savitree Thummasorn, Natthaphat Siri-Angkul, Siriporn Chattipakorn, Nipon Chattipakorn
Sodium-glucose cotransporter 2 inhibitor (SGLT2-i) effects on cardiac ischemia/reperfusion (I/R) injury are unclear. Unlike SGLT2-i, dipeptidyl peptidase 4 inhibitors (DPP4-i) have shown effective cardioprotection in cardiac I/R injury. We aimed to investigate whether SGLT2-i reduces myocardial dysfunction and myocardial injury to a greater extent than DPP4-i in obese-insulin resistant rats with/without cardiac I/R injury. The high fat (HF) diet induced obese-insulin resistant rats were divided into 4 groups and received the following treatments for 28 days: vehicle (HFV); vildagliptin at a dosage of 3 mg/kg/day (HFVil); dapagliflozin at a dosage of 1 mg/kg/day (HFDa); and combination drugs (HFDaVil)...
November 15, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/29141940/the-effects-of-different-storage-solutions-on-renal-ischemia-tolerance-after-kidney-transplantation-in-mice
#20
Lei Wang, Jin Wei, Shan Jiang, Hui-Hua Li, Liying Fu, Jie Zhang, Ruisheng Liu
Cold storage is the most prevalent method for graft preservation in kidney transplantation (KTX). The protective effects of various preservation solutions have been extensively studied in both clinical trials and experimental animal models. However, a paucity of studies examined the effect of different preservation solutions on graft function in mouse KTX, in addition, the tolerance of the transplanted grafts to further insult has not been evaluated, which were the objectives of the present study. We performed mouse KTX in three groups with the donor kidneys preserved in different solutions for 60 minutes: saline, mouse serum, and University of Wisconsin (UW) solution...
November 15, 2017: American Journal of Physiology. Renal Physiology
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