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https://www.readbyqxmd.com/read/28708111/an-evaluation-of-ischaemic-preconditioning-as-a-method-of-reducing-ischaemia-reperfusion-injury-in-liver-surgery-and-transplantation
#1
REVIEW
Francis P Robertson, Barry J Fuller, Brian R Davidson
Liver Ischaemia Reperfusion (IR) injury is a major cause of post-operative liver dysfunction, morbidity and mortality following liver resection surgery and transplantation. There are no proven therapies for IR injury in clinical practice and new approaches are required. Ischaemic Preconditioning (IPC) can be applied in both a direct and remote fashion and has been shown to ameliorate IR injury in small animal models. Its translation into clinical practice has been difficult, primarily by a lack of knowledge regarding the dominant protective mechanisms that it employs...
July 14, 2017: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/28699679/one-session-of-remote-ischemic-preconditioning-does-not-improve-vascular-function-in-acute-normobaric-and-chronic-hypobaric-hypoxia
#2
Mathew G Rieger, Ryan L Hoiland, Joshua C Tremblay, Mike Stembridge, Anthony R Bain, Daniela Flück, Prajan Subedi, James D Anholm, Philip N Ainslie
Application of repeated short duration bouts of ischemia to the limbs, termed remote ischemic preconditioning (RIPC), is a novel technique that may have protective effects on vascular function during hypoxic exposures. In separate parallel-design studies, at sea-level (SL; n = 16), and after 8-12 days at high-altitude (HA; n = 12; White Mountain, 3800 m), participants underwent either a sham protocol or one session of 4 × 5 minutes of dual-thigh cuff occlusion with 5 minutes recovery. Brachial artery flow-mediated dilation (FMD; ultrasound), pulmonary artery systolic pressure (PASP; echocardiography), and internal carotid artery flow (ICA; ultrasound) were measured at SL in normoxia and isocapnic hypoxia [end-tidal PO₂ (PETO₂) maintained to 50 mmHg], and during normal breathing at HA...
July 12, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28678070/tranexamic-acid-does-not-influence-cardioprotection-by-ischemic-preconditioning-and-remote-ischemic-preconditioning
#3
Patrick van Caster, Sandra Eiling, Yvonne Boekholt, Friederike Behmenburg, Marianne Dorsch, André Heinen, Markus W Hollmann, Ragnar Huhn
Prior studies have suggested that the antifibrinolytic drug aprotinin increases the infarct size after ischemia and reperfusion (I/R) and attenuates the effect of ischemic preconditioning (IPC). Aprotinin was replaced by tranexamic acid (TXA) in clinical practice. Here, we investigated whether TXA influences I/R injury and/or cardioprotection initiated by IPC and/or remote ischemic preconditioning (RIPC). Anesthetized male Wistar rats were randomized to 6 groups. Control animals were not further treated. Administration of TXA was combined with and without IPC and RIPC...
July 1, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28651898/remote-ischaemic-preconditioning-in-orthotopic-liver-transplantation-ripcolt-trial-a-pilot-randomized-controlled-feasibility-study
#4
Francis P Robertson, Rup Goswami, Graham P Wright, Charles Imber, Dinesh Sharma, Massimo Malago, Barry J Fuller, Brian R Davidson
BACKGROUND: Ischaemia Reperfusion (IR) injury is a major cause of morbidity, mortality and graft loss following Orthotopic Liver Transplantation (OLT). Utilising marginal grafts, which are more susceptible to IR injury, makes this a key research goal. Remote Ischaemic Preconditioning (RIPC) has been shown to ameliorate hepatic IR injury in experimental models. Whether RIPC can reduce IR injury in human liver transplant recipients is unknown. METHODS: Forty patients undergoing liver transplantation were randomized to RIPC or a sham...
June 23, 2017: HPB: the Official Journal of the International Hepato Pancreato Biliary Association
https://www.readbyqxmd.com/read/28631503/exercise-induced-cardioprotection-and-the-therapeutic-potential-of-ripc
#5
John C Quindry
In the search for innovative solutions to treat ischemic heart disease, recent basic science and clinical approaches have focused on remote ischemic preconditioning (RIPC). Remote ischemic preconditioning involves short intervals of limb blood flow occlusion by the application of a blood pressure cuff inflated to a suprasystolic pressure. The promise of RIPC in the development of new cardioprotective therapies is founded on the premise that it is cost-effective, technically simple, and overcomes many logistical and biochemical hurdles associated with other ischemic preconditioning approaches...
January 1, 2017: Journal of Cardiovascular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28627174/integrative-analysis-of-renal-ischemia-reperfusion-injury-and-remote-ischemic-preconditioning-in-mice
#6
Kumsun Cho, Sang-Il Min, Sanghyun Ahn, Seung-Kee Min, Curie Ahn, Kyung-Sang Yu, In-Jin Jang, Joo-Youn Cho, Jongwon Ha
Remote ischemic preconditioning (RIPC) is a strategy to induce resistance in a target organ against the oxidative stress and injury caused by ischemia and reperfusion (IR). RIPC harnesses the body's endogenous protective capabilities through brief episodes of IR applied in organs remote from the target. Few studies have analyzed this phenomenon in the kidney. Furthermore, the window of protection representing RIPC efficacy has not been fully elucidated. Here, we performed a multiomics study to specify those associated with protective effects of RIPC against the IR injury...
July 3, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28599085/exploring-the-putative-role-of-trpv1-dependent-cgrp-release-in-remote-hind-preconditioning-induced-cardioprotection
#7
Puneet Kaur Randhawa, Amteshwar Singh Jaggi
Remote ischemic preconditioning (RIPC) is a phenomenon whereby transient non-lethal ischemia and reperfusion episodes confer protection against prolonged ischemia-reperfusion-induced injury. However, the underlying intracellular signaling has not been extensively explored. The present study aims to inspect the putative involvement of TRPV1 -dependent CGRP release in mediating remote hind limb preconditioning-induced cardioprotection. In the present study, remote hind limb preconditioning stimulus was delivered (4 consecutive episodes of 5 minutes of ischemia-reperfusion) using a blood pressure cuff tied at the inguinal level of the rat...
June 9, 2017: Cardiovascular Therapeutics
https://www.readbyqxmd.com/read/28566501/prevention-of-contrast-induced-nephropathy-by-limb-ischemic-preconditioning-underlying-mechanisms-and-clinical-effects
#8
George Dugbartey, Andrew N Redington
Contrast-induced nephropathy (CIN) is an important complication following diagnostic radiographic imaging and interventional therapy. It results from administration of intravascular iodinated contrast media (CM) and is currently the third most common cause of hospital-acquired acute kidney injury. CIN is associated with increased morbidity, prolonged hospitalization and higher mortality. Although the importance of CIN is widely appreciated, and its occurrence can be mitigated by the use of pre- and post-hydration protocols and low osmolar instead of high osmolar iodine-containing CM, specific prophylactic therapy is lacking...
May 31, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28551796/nitrite-nitric-oxide-signaling-and-cardioprotection
#9
Matthias Totzeck, Ulrike B Hendgen-Cotta, Tienush Rassaf
Cardioprotective strategies to prevent damage to mitochondria in acute myocardial infarction are warranted to reduce lethal myocardial ischemia/reperfusion (I/R) injury. Mitochondrial antagonists in I/R are reactive oxygen species (ROS), deteriorated calcium signaling, permeabilization of the mitochondrial outer membrane (MOM) and deranged mitochondrial structural dynamism (fusion and fission). Nitric oxide (NO) related signaling can protect hearts from I/R. Albeit the underlying signaling is incompletely resolved, recent data point to a particular involvement of protective posttranslational modification of mitochondrial elements...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28526338/redox-signaling-in-remote-ischemic-preconditioning-induced-cardioprotection-evidences-and-mechanisms
#10
REVIEW
Lovedeep Singh, Puneet Kaur Randhawa, Nirmal Singh, Amteshwar Singh Jaggi
Reactive oxygen species are the reactive molecules that are derived from molecular oxygen and play an important role as redox signaling molecules to confer cardioprotection. Various scientists have demonstrated the key role of redox signaling in cardioprotection by showing a transient increase in their levels during remote ischemic preconditioning (RIPC) phase. The transient increase in reactive oxygen species levels during remote preconditioning phase may take place either through activation of KATP channels or through increased nitric oxide (NO) production...
May 17, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28504995/remote-ischemic-preconditioning-decreases-oxidative-lung-damage-after-pulmonary-lobectomy-a-single-center-randomized-double-blind-controlled-trial
#11
José García-de-la-Asunción, Laura Bruno, Jaume Perez-Griera, Genaro Galan, Alfonso Morcillo, Richard Wins, Eva García-Del-Olmo, Ricardo Guijarro, Benjamín Sarriá, Francisco Martí, Marina Soro, Francisco Javier Belda
BACKGROUND: During lobectomy in patients with lung cancer, the operated lung is often collapsed and hypoperfused. Ischemia/reperfusion injury may then occur when the lung is re-expanded. We hypothesized that remote ischemic preconditioning (RIPC) would decrease oxidative lung damage and improve gas exchange in the postoperative period. METHODS: We conducted a single-center, randomized, double-blind trial in patients with nonsmall cell lung cancer undergoing elective lung lobectomy...
August 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28475274/remote-ischaemic-preconditioning-for-coronary-artery-bypass-grafting-with-or-without-valve-surgery
#12
REVIEW
Carina Benstoem, Christian Stoppe, Oliver J Liakopoulos, Julia Ney, Dirk Hasenclever, Patrick Meybohm, Andreas Goetzenich
BACKGROUND: Despite substantial improvements in myocardial preservation strategies, coronary artery bypass grafting (CABG) is still associated with severe complications. It has been reported that remote ischaemic preconditioning (RIPC) reduces reperfusion injury in people undergoing cardiac surgery and improves clinical outcome. However, there is a lack of synthesised information and a need to review the current evidence from randomised controlled trials (RCTs). OBJECTIVES: To assess the benefits and harms of remote ischaemic preconditioning in people undergoing coronary artery bypass grafting, with or without valve surgery...
May 5, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28454323/microrna-29a-b-c-targets-inos-and-is-involved-in-protective-remote-ischemic-preconditioning-in-an-ischemia-reperfusion-rat-model-of-non-alcoholic-fatty-liver-disease
#13
Yun-Fei Duan, Dong-Lin Sun, Jing Chen, Feng Zhu, Yong An
Remote ischemic preconditioning (RIPC) protects against the injury that is incurred by ischemia and reperfusion (IR); however, the role of RIPC in liver IR injury in non-alcoholic fatty liver disease (NAFLD) remains unclear. In this study, a NAFLD rat model was utilized in a series of different surgical procedures and molecular experiments. Rats of the IR group and the RIPC+IR group exhibited more severe injury than NAFLD control rats (in which the liver was prodded following a median-incision laparotomy). The liver condition, measured by serum alanine transaminase and aspartate transaminase levels, of the RIPC+IR group was better than that of the IR group...
March 2017: Oncology Letters
https://www.readbyqxmd.com/read/28434264/exploring-effects-of-remote-ischemic-preconditioning-in-a-pig-model-of-hypothermic-circulatory-arrest
#14
Johanna Herajärvi, Tuomas Anttila, Elitsa Y Dimova, Tuomas Laukka, Mikko Myllymäki, Henri Haapanen, Benjamin A Olenchock, Hannu Tuominen, Ulla Puistola, Peeter Karihtala, Kai Kiviluoma, Peppi Koivunen, Vesa Anttila, Tatu Juvonen
OBJECTIVES: During aortic and cardiac surgery, risks for mortality and morbidity are inevitable. Surgical setups involving deep hypothermic circulatory arrest (DHCA) are effective to achieve organ protection against ischemic injury. The aim of this study was to identify humoural factors mediating additive protective effects of remote ischemic preconditioning (RIPC) in a porcine model of DHCA. DESIGN: Twenty-two pigs were randomized into the RIPC group (n = 11) and the control group (n = 11)...
April 24, 2017: Scandinavian Cardiovascular Journal: SCJ
https://www.readbyqxmd.com/read/28401075/repeated-remote-ischemic-conditioning-effect-on-ankle-brachial-index-in-diabetic-patients-a-randomized-control-trial
#15
Najmeh Shahvazian, Mansour Rafiee, Masoud Rahmanian, Seyed Kazem Razavi-Ratki, Mohammad Hadi Farahzadi
BACKGROUND: Remote ischemic preconditioning (RIPC) is a phenomenon where a short period of ischemia in one organ protects against further ischemia in the other organs. We hypothesized that RIPC occurring in diabetic patients with ankle brachial index (ABI) between 0.70 and 0.90 were included with peripheral arterial disease, would make the better coronary flow resulted in the increasing ABI. MATERIALS AND METHODS: This randomized clinical trial study was done in the Afshar Cardiovascular Hospital in Yazd between 2013 and 2014...
2017: Advanced Biomedical Research
https://www.readbyqxmd.com/read/28391169/hypoxia-induced-extracellular-vesicles-mediate-protection-of-remote-ischemic-preconditioning-for-renal-ischemia-reperfusion-injury
#16
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/28381098/remote-preconditioning-and-vascular-surgery
#17
Donagh A Healy, Stewart R Walsh
Remote ischemic preconditioning (RIPC) is a theoretically attractive strategy for organ protection; and phase 2 studies in a variety of settings have yielded promising results. In this article, we review the existing clinical studies on RIPC in vascular surgery. We examine aspects of design that may potentially be optimized in future vascular surgery studies and we highlight some challenges that have emerged since the publication of the Remote Ischaemic Preconditioning for Heart Surgery (RIPHeart) trial and the Effect of Remote Ischaemic Preconditioning on Clinical Outcomes in Patients Undergoing Coronary Artery Bypass Surgery (ERICCA) trial...
July 2017: Journal of Cardiovascular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28374972/ventilation-strategy-has-a-major-influence-on-remote-ischaemic-preconditioning-in-mice
#18
Sean M Davidson, Zhenhe He, Alex Dyson, Daniel I Bromage, Derek M Yellon
Whether oxygen should be administered acutely during ST-segment elevation myocardial infarction is debated. Despite this controversy, the possible influence of supplementary oxygen on animal models of ischaemia-reperfusion injury or cardioprotection is rarely considered. We used an in vivo mouse model of ischaemia and reperfusion to investigate the effect of ventilation with room air versus 100% oxygen. The coronary artery of anaesthetized mice was occluded for 40 min. followed by 2-hrs reperfusion. Infarct size was measured by tetrazolium staining and expressed as a percentage of area at risk, determined using Evan's blue...
April 4, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28356068/a-randomized-trial-of-remote-ischemic-preconditioning-and-control-treatment-for-cardioprotection-in-sevoflurane-anesthetized-cabg-patients
#19
Rianne Nederlof, Nina C Weber, Nicole P Juffermans, Bas A M J de Mol, Markus W Hollmann, Benedikt Preckel, Coert J Zuurbier
BACKGROUND: Remote ischemic preconditioning (RIPC) efficacy is debated. Possibly, because propofol, which has a RIPC-inhibiting action, is used in most RIPC trials. It has been suggested that clinical efficacy is, however, present with volatile anesthesia in the absence of propofol, although this is based on one phase 1 trial only. Therefore, in the present study we further explore the relation between RIPC and cardioprotection with perioperative anesthesia restricted to sevoflurane and fentanyl, in CABG patients without concomitant procedures...
March 29, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/28344616/the-impact-of-a-single-episode-of-remote-ischemic-preconditioning-on-myocardial-injury-after-elective-percutaneous-coronary-intervention
#20
Mustafa A Yılmaztepe, Gökay Taylan, Meryem Aktoz, Hanefi Y Gürlertop, Yüksel Aksoy, Fatih Özçelik, Kenan Yalta, Galip Ekuklu
INTRODUCTION: Myocardial injury after percutaneous coronary intervention (PCI) occurs in approximately 30% of procedures, and is related to worse prognosis. Effects of remote ischemic preconditioning (RIPC) on reperfusion injury have been investigated before, yielding conflicting results. AIM: To assess the impact of a single episode of RIPC on myocardial injury after elective PCI. MATERIAL AND METHODS: One hundred and four patients undergoing elective PCI, with normal baseline cardiac troponin-I (cTn-I) values, were randomized to two groups...
2017: Postępy W Kardiologii Interwencyjnej, Advances in Interventional Cardiology
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