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Ischemia reperfusion hemorrhage

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https://www.readbyqxmd.com/read/29283978/review-hibernation-based-approaches-in-the-treatment-of-hemorrhagic-shock
#1
Andrea Wolf, Elizabeth R Lusczek, Gregory J Beilman
Hemorrhagic shock is the leading cause of preventable death after trauma. Hibernation-based treatment approaches have been of increasing interest for various biomedical applications. Due to apparent similarities in tissue perfusion and metabolic activity between severe blood loss and the hibernating state, hibernation-based approaches have also emerged for the treatment of hemorrhagic shock. Research has shown that hibernators are protected from shock-induced injury and inflammation. Utilizing the adaptive mechanisms that prevent injury in these animals may help alleviate the detrimental effects of hemorrhagic shock in non-hibernating species...
December 27, 2017: Shock
https://www.readbyqxmd.com/read/29277912/a-hemorrhagic-transformation-model-of-mechanical-stroke-therapy-with-acute-hyperglycemia-in-mice
#2
David Couret, Steeve Bourane, Aurélie Catan, Brice Nativel, Cynthia Planesse, Anne-Claire Dorsemans, Imade Ait-Arsa, Maxime Cournot, Philippe Rondeau, Jessica Patche, Alexy Tran-Dinh, Gilles Lambert, Nicolas Diotel, Olivier Meilhac
Clinical benefit for mechanical thrombectomy (MT) in stroke was recently demonstrated in multiple large prospective studies. Acute hyperglycemia is an important risk factor of poor outcome in stroke patients, including those that underwent MT. The aim of this therapy is to achieve a complete reperfusion in a short time, given that reperfusion damage is dependent on the duration of ischemia. Here, we investigated the effects of acute hyperglycemia in a mouse model of ischemic stroke induced by middle cerebral artery occlusion (MCAO)...
December 26, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/29275501/baicalin-attenuates-blood-brain-barrier-disruption-and-hemorrhagic-transformation-and-improves-neurological-outcome-in-ischemic-stroke-rats-with-delayed-t-pa-treatment-involvement-of-onoo-mmp-9-pathway
#3
Hansen Chen, Binghe Guan, Xi Chen, Xingmiao Chen, Caiming Li, Jinhua Qiu, Dan Yang, Ke Jian Liu, Suhua Qi, Jiangang Shen
Tissue plasminogen activator (t-PA) has a restrictive therapeutic window within 4.5 h after ischemic stroke with the risk of hemorrhagic transformation (HT) and neurotoxicity when it is used beyond the time window. In the present study, we tested the hypothesis that baicalin, an active compound of medicinal plant, could attenuate HT in cerebral ischemia stroke with delayed t-PA treatment. Male Sprague-Dawley rats were subjected to middle cerebral artery occlusion (MCAO) for 4.5 h and then continuously received t-PA infusion (10 mg/kg) for 0...
December 23, 2017: Translational Stroke Research
https://www.readbyqxmd.com/read/29262429/blood-pressure-management-for-acute-ischemic-and-hemorrhagic-stroke-the-evidence
#4
Sang-Bae Ko, Byung-Woo Yoon
Hypertension is the most common modifiable risk factor for stroke (both ischemic and hemorrhagic types). In the hyperacute phase, a majority of patients shows an elevated blood pressure (BP) at the time of presentation because of sympathetic hyperactivity or a physiological response to tissue ischemia. Therefore, BP may decrease spontaneously in a few hours and may drop further when complete recanalization is achieved. In stroke guidelines, an elevated BP is usually left untreated up to a systolic BP (SBP) of 220 mm Hg and a diastolic BP of 120 mm Hg...
December 2017: Seminars in Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29232823/improving-cerebral-blood-flow-after-arterial-recanalization-a-novel-therapeutic-strategy-in-stroke
#5
REVIEW
Mohamad El Amki, Susanne Wegener
Ischemic stroke is caused by a disruption in blood supply to a region of the brain. It induces dysfunction of brain cells and networks, resulting in sudden neurological deficits. The cause of stroke is vascular, but the consequences are neurological. Decades of research have focused on finding new strategies to reduce the neural damage after cerebral ischemia. However, despite the incredibly huge investment, all strategies targeting neuroprotection have failed to demonstrate clinical efficacy. Today, treatment for stroke consists of dealing with the cause, attempting to remove the occluding blood clot and recanalize the vessel...
December 9, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29200946/combined-hemorrhagic-shock-and-unilateral-common-carotid-occlusion-induces-neurological-injury-in-adult-male-rats
#6
Chung-Ching Chio, Chien-Chin Hsu, Yu-Feng Tian, Chung-Han Wang, Mao-Tsun Lin, Ching-Ping Chang, Hung-Jung Lin
Background: Clinical assessment reveals that patients after surgery of cardiopulmonary bypass or coronary bypass experience postoperative cognitive dysfunction. This study aimed to investigate whether resuscitation after a hemorrhagic shock (HS) and/or mild cerebral ischemia caused by a unilateral common carotid artery occlusion (UCCAO) can cause brain injury and concomitant neurological dysfunction, and explore the potential mechanisms. Methods: Blood withdrawal (6 mL/100 g body weight) for 60 min through the right jugular vein catheter-induced an HS...
2017: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/29194320/no-iv-no-problem-intraosseous-administration-of-tranexamic-acid-is-as-effective-as-intravenous-in-a-porcine-hemorrhage-model
#7
Michael S Lallemand, Donald M Moe, John M McClellan, Michael Loughren, Shannon Marko, Matthew J Eckert, Matthew J Martin
BACKGROUND: The acute coagulopathy of trauma is often accompanied by hyperfibrinolysis. TXA can reverse this phenomenon, and, when given early, decreases mortality from bleeding. Establishing IV access can be difficult in trauma and IO access is often preferred for drug administration. Currently, there is no data on the efficacy of IO administered TXA. Our objectives were to compare serum concentrations of tranexamic acid (TXA) when given IV and intraosseous (IO) and to compare the efficacy of IO administered TXA to IV at reversing hyperfibrinolysis METHODS: Using a porcine hemorrhage and ischemia-reperfusion (IR) model, 18 swine underwent hemorrhagic shock followed by a tissue plasminogen activator (tPA) infusion to induce hyperfibrinolysis...
December 1, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/29176401/2017-military-supplement-dodecafluoropentane-emulsion-ddfpe-as-a-resuscitation-fluid-for-treatment-of-hemorrhagic-shock-and-traumatic-brain-injury-a-review
#8
Kaitlin Graham, Paula F Moon-Massat, Evan C Unger
Dodecafluoropentane emulsion (DDFPe) is a novel nanotechnology for oxygen delivery with therapeutic potential for hemorrhagic shock and/or traumatic brain injury (TBI). DDFPe demonstrates efficacy at smaller doses than previously tested perfluorocarbon oxygen therapeutics. This smaller dose potentially eliminates toxicities exhibited by previous oxygen therapeutics, while anti-inflammatory properties of DDFPe may alleviate damage from ischemia reperfusion injury. This mini-review summarizes our progress in developing a battle-field ready product to prevent combat death due to hemorrhagic shock and/or TBI...
November 15, 2017: Shock
https://www.readbyqxmd.com/read/29137368/the-protective-effects-of-carboxyhemoglobin-during-the-resuscitation-from-hemorrhagic-shock-in-rats
#9
Hongyu Liu, Songyan Yu, Yaojun Peng, Xin Chang, Xinguang Yu
Aim: This study was aimed to explore the effects of carboxyhemoglobin on reperfusion injury in hemorrhagic shock, as well as its action time and related mechanisms. Results: CO-RBC group showed milder oxidative injury than O2-RBC group. CO reperfusion did not show advantages in functions of kidney and lung during resuscitation. The level of Bax was decreased in CO-RBC group, especially in early CO-RBC group. Moreover, the autophay-related gene Beclin-1 was down-regulated in CO-RBC and early CO-RBC groups...
October 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/29125039/astrocyte-autophagy-flux-protects-neurons-against-oxygen-glucose-deprivation-and-ischemic-reperfusion-injury
#10
Xue Liu, Fengfeng Tian, Shiquan Wang, Feng Wang, Lize Xiong
The role of autophagy varies with the type of acute brain injury. In general, autophagy mediates a clear neuroprotective effect in intoxication caused by various psychoactive agents, subarachnoid hemorrhage and spinal cord injury. In contrast, autophagic cell death has also been reported to actively contribute to neuronal loss in neonatal hypoxic ischemic encephalopathy. However, it still remains to be determined whether autophagy pays a cytoprotective or a cytotoxic role in stroke. Previous studies focused primarily on the role of neurons rather than the role of astrocytes in brain injury...
November 10, 2017: Rejuvenation Research
https://www.readbyqxmd.com/read/29102280/reperfusion-therapy-what-s-with-the-obstructed-leaky-and-broken-capillaries
#11
REVIEW
D Neil Granger, Peter R Kvietys
Microvascular dysfunction is well established as an early and rate-determining factor in the injury response of tissues to ischemia and reperfusion (I/R). Severe endothelial cell dysfunction, which can develop without obvious morphological cell injury, is a major underlying cause of the microvascular abnormalities that accompany I/R. While I/R-induced microvascular dysfunction is manifested in different ways, two responses that have received much attention in both the experimental and clinical setting are impaired capillary perfusion (no-reflow) and endothelial barrier failure with a transition to hemorrhage...
September 21, 2017: Pathophysiology: the Official Journal of the International Society for Pathophysiology
https://www.readbyqxmd.com/read/29079502/inhibiting-12-15-lipoxygenase-to-treat-acute-stroke-in-permanent-and-tpa-induced-thrombolysis-models
#12
H Karatas, Joo Eun Jung, E H Lo, K van Leyen
12/15-Lipoxygenase (12/15-LOX) contributes to the brain damage after middle cerebral artery occlusion (MCAO) in the acute phase of stroke. The aim of this study was to investigate the effects of a 12/15-LOX inhibitor, LOXBlock-1(LB1), in mice using a FeCl3-induced permanent distal MCAO model and FeCl3-induced ischemia/thrombolysis with tPA. In order to induce permanent distal MCAO, 30% FeCl3 was used in C57BL6 mice. LB1 or DMSO treatments were applied intraperitoneally 2hrs following MCAO. For FeCl3-induced ischemia/thrombolysis experiments, 10% FeCl3 was preferred so as to obtain reperfusion with tPA in CD1 mice...
October 24, 2017: Brain Research
https://www.readbyqxmd.com/read/29053904/a-direct-aspiration-first-pass-technique-adapt-for-acute-stroke-therapy-a-systematic-review-and-meta-analysis
#13
Benjamin Gory, Xavier Armoiry, Rotem Sivan-Hoffman, Michel Piotin, Mikael Mazighi, Bertrand Lapergue, Raphaël Blanc, Francis Turjman
BACKGROUND AND PURPOSE: ADAPT (A Direct Aspiration First Pass Technique), involving the first-line use of large-bore distal aspiration catheter, is a new strategy in the mechanical thrombectomy of acute ischemic stroke caused by large vessel occlusion. However, its impact on reperfusion rates, clinical outcomes, and complication rates is not fully examined. METHOD: We conducted a systematic review of the literature searching multiple databases for reports on thrombectomy of acute stroke with the ADAPT technique and performed meta-analyses of clinical and radiographic outcomes...
October 20, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28991143/the-pitfalls-of-reboa-risk-factors-and-mitigation-strategies
#14
Anders J Davidson, Rachel M Russo, Viktor A Reva, Megan L Brenner, Laura J Moore, Chad Ball, Eileen Bulger, Joseph J DuBose, Ernest E Moore, Todd E Rasmussen
Despite technological advancements, REBOA is associated with significant risks due to complications of vascular access and ischemia-reperfusion. The inherent morbidity and mortality of REBOA is often compounded by coexisting injury and hemorrhagic shock. Additionally, the potential for REBOA-related injuries is exaggerated due to the growing number of interventions being performed by providers who have limited experience in endovascular techniques, inadequate resources, minimal training in the technique, and who are performing this maneuver in emergency situations...
October 4, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28985560/ferroptosis-a-regulated-cell-death-nexus-linking-metabolism-redox-biology-and-disease
#15
REVIEW
Brent R Stockwell, José Pedro Friedmann Angeli, Hülya Bayir, Ashley I Bush, Marcus Conrad, Scott J Dixon, Simone Fulda, Sergio Gascón, Stavroula K Hatzios, Valerian E Kagan, Kay Noel, Xuejun Jiang, Andreas Linkermann, Maureen E Murphy, Michael Overholtzer, Atsushi Oyagi, Gabriela C Pagnussat, Jason Park, Qitao Ran, Craig S Rosenfeld, Konstantin Salnikow, Daolin Tang, Frank M Torti, Suzy V Torti, Shinya Toyokuni, K A Woerpel, Donna D Zhang
Ferroptosis is a form of regulated cell death characterized by the iron-dependent accumulation of lipid hydroperoxides to lethal levels. Emerging evidence suggests that ferroptosis represents an ancient vulnerability caused by the incorporation of polyunsaturated fatty acids into cellular membranes, and cells have developed complex systems that exploit and defend against this vulnerability in different contexts. The sensitivity to ferroptosis is tightly linked to numerous biological processes, including amino acid, iron, and polyunsaturated fatty acid metabolism, and the biosynthesis of glutathione, phospholipids, NADPH, and coenzyme Q10...
October 5, 2017: Cell
https://www.readbyqxmd.com/read/28944828/protective-effects-of-gv1001-on-myocardial-ischemia%C3%A2-reperfusion-injury
#16
Ji-Eun Chang, Hyun Jun Kim, Sanghoon Jheon, Cheong Lim
The potential cardioprotective effects of the novel vaccine peptide GV1001 were evaluated in myocardial ischemia‑reperfusion injury induced rat models. GV1001 is a human telomerase reverse transcriptase derived peptide, which has been reported to possess both anti‑tumor and anti‑inflammatory effects. The normal saline (control group) and various concentrations (0.001‑10 mg/kg) of GV1001 were administered directly to the right ventricle anterior wall before induction of ischemia. The was induced by Tightening the snare around the left anterior descending coronary artery for 40 min, before releasing the snare for 10 min induced the myocardial ischemia‑reperfusion injury and was conducted in Sprague‑Dawley rats...
November 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28931617/normobaric-hyperoxia-reduces-blood-occludin-fragments-in-rats-and-patients-with-acute-ischemic-stroke
#17
Shuhai Shi, Zhifeng Qi, Qingfeng Ma, Rong Pan, Graham S Timmins, Yongmei Zhao, Wenjuan Shi, Yunzhou Zhang, Xunming Ji, Ke Jian Liu
BACKGROUND AND PURPOSE: Damage of the blood-brain barrier (BBB) increases the incidence of neurovascular complications, especially for cerebral hemorrhage after tPA (tissue-type plasminogen activator) therapy. Currently, there is no effective method to evaluate the extent of BBB damage to guide tPA use. Herein, we investigated whether blood levels of tight junction proteins could serve as biomarker of BBB damages in acute ischemic stroke (AIS) in both rats and patients. We examined whether this biomarker could reflect the extent of BBB permeability during cerebral ischemia/reperfusion and the effects of normobaric hyperoxia (NBO) on BBB damage...
October 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28930961/impact-of-a-novel-phosphoinositol-3-kinase-inhibitor-in-preventing-mitochondrial-dna-damage-and-damage-associated-molecular-pattern-accumulation-results-from-the-biochronicity-project
#18
George Edward Black, Kyle K Sokol, Donald M Moe, Jon D Simmons, David Muscat, Victor Pastukh, Gina Capley, Olena Gorodnya, Mykhaylo Ruchko, Mark B Roth, Mark Gillespie, Matthew J Martin
BACKGROUND: Despite improvements in the management of severely injured patients, development of multiple organ dysfunction syndrome (MODS) remains a morbid complication of traumatic shock. One of the key attributes of MODS is a profound bioenergetics crisis, for which the mediators and mechanisms are poorly understood. We hypothesized that metabolic uncoupling using an experimental phosphoinositol-3 kinase (PI3-K) inhibitor, LY294002 (LY), may prevent mitochondrial abnormalities that lead to the generation of mitochondrial DNA (mtDNA) damage and the release of mtDNA damage-associated molecular patterns (DAMPs)...
October 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28887393/white-matter-hyperintensity-volume-and-outcome-of-mechanical-thrombectomy-with-stentriever-in-acute-ischemic-stroke
#19
Kunakorn Atchaneeyasakul, Thabele Leslie-Mazwi, Kathleen Donahue, Anne-Katrin Giese, Natalia S Rost
BACKGROUND AND PURPOSE: Finding of white matter hyperintensity (WMH) has been associated with an increased risk of parenchymal hematoma and poor clinical outcomes after mechanical thrombectomy using old-generation endovascular devices. Currently, no data exist with regard to the risk of mechanical thrombectomy using stentriever devices in patients with significant WMH. We hypothesized that WMH volume will not affect the hemorrhagic and clinical outcome in patients with acute ischemic stroke undergoing thrombectomy using new-generation devices...
October 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28865922/prediction-of-hemorrhagic-transformation-after-acute-thrombolysis-following-major-artery-occlusion-using-relative-adc-ratio-a-retrospective-study
#20
N Shinoda, S Hori, K Mikami, T Bando, D Shimo, T Kuroyama, Y Kuramoto, M Matsumoto, O Hirai, Y Ueno
BACKGROUND: The relative apparent diffusion coefficient (ADC) ratio can be used to evaluate the extent of ischemia. We investigated the risk factors for, and correlation between, relative ADC ratio and hemorrhagic transformation (HT) after thrombolysis. METHODS: This single-center, retrospective study involved 105 patients with acute occlusion of the anterior circulation. Relative ADC ratio was calculated as the ratio of ADC pixel values, within the affected territory to ADC pixel values in the contralateral normal region...
September 1, 2017: Journal of Neuroradiology. Journal de Neuroradiologie
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