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Ischemia reperfusion hemorrhage

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https://www.readbyqxmd.com/read/28217292/oxygen-or-cooling-to-make-a-decision-after-acute-ischemia-stroke
#1
REVIEW
Wen-Cao Liu, Xin-Chun Jin
The presence of a salvageable penumbra, a region of ischemic brain tissue with sufficient energy for short-term survival, has been widely agreed as the premise for thrombolytic therapy with tissue plasminogen activator (tPA), which remains the only United States Food and Drug Administration (FDA) approved treatment for acute ischemia stroke. However, the use of tPA has been profoundly constrained due to its narrow therapeutic time window and the increased risk of potentially deadly hemorrhagic transformation (HT)...
October 2016: Medical Gas Research
https://www.readbyqxmd.com/read/28193834/genome-wide-analysis-of-the-circulating-mirnome-after-cerebral-ischemia-reveals-a-reperfusion-induced-microrna-cluster
#2
Stefan Uhlmann, Eva Mracsko, Ehsan Javidi, Sarah Lamble, Ana Teixeira, Agnes Hotz-Wagenblatt, Karl-Heinz Glatting, Roland Veltkamp
BACKGROUND AND PURPOSE: Circulating microRNAs (miRNAs) are emerging biomarkers for stroke because of their high stability in the bloodstream and association with pathophysiologic conditions. However, the circulating whole-genome miRNAs (miRNome) has not been characterized comprehensively in the acute phase of stroke. METHODS: We profiled the circulating miRNome in mouse models of acute ischemic and hemorrhagic stroke by next-generation sequencing. Stroke models were compared with sham-operated and naive mice to identify deregulated circulating miRNAs...
February 13, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28059705/emergent-endovascular-management-of-long-segment-and-flow-limiting-carotid-artery-dissections-in-acute-ischemic-stroke-intervention-with-multiple-tandem-stents
#3
S A Ansari, A L Kühn, A R Honarmand, M Khan, M C Hurley, M B Potts, B S Jahromi, A Shaibani, M J Gounis, A K Wakhloo, A S Puri
BACKGROUND AND PURPOSE: Although most cervical dissections are managed medically, emergent endovascular treatment may become necessary in the presence of intracranial large-vessel occlusions, flow-limiting and long-segment dissections with impending occlusion, and/or hypoperfusion-related ischemia at risk of infarction. We investigated the role of emergent endovascular stenting of long-segment carotid dissections in the acute ischemic stroke setting. MATERIALS AND METHODS: We retrospectively studied long-segment carotid dissections requiring stent reconstruction with multiple tandem stents (≥3 stents) and presenting with acute (<12 hours) ischemic stroke symptoms (NIHSS score, ≥4)...
January 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28035779/reduction-of-intracerebral-hemorrhage-by-rivaroxaban-after-tpa-thrombolysis-is-associated-with-downregulation-of-par-1-and-par-2
#4
Ryuta Morihara, Toru Yamashita, Syoichiro Kono, Jingwei Shang, Yumiko Nakano, Kota Sato, Nozomi Hishikawa, Yasuyuki Ohta, Stefan Heitmeier, Elisabeth Perzborn, Koji Abe
This study aimed to assess the risk of intracerebral hemorrhage (ICH) after tissue-type plasminogen activator (tPA) treatment in rivaroxaban compared with warfarin-pretreated male Wistar rat brain after ischemia in relation to activation profiles of protease-activated receptor-1, -2, -3, and -4 (PAR-1, -2, -3, and -4). After pretreatment with warfarin (0.2 mg/kg/day), low-dose rivaroxaban (60 mg/kg/day), high-dose rivaroxaban (120 mg/kg/day), or vehicle for 14 days, transient middle cerebral artery occlusion was induced for 90 min, followed by reperfusion with tPA (10 mg/kg/10 ml)...
December 30, 2016: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/28011950/involvement-of-corticotropin-releasing-factor-and-corticotropin-releasing-factor-2-receptors-in-pathogenesis-of-ischemia-reperfusion-induced-enteritis-in-rats
#5
K Takeuchi, A Kumano, N Abe, T Kotani
We herein investigated, using a corticotropin-releasing factor (CRF) agonist and antagonists, whether CRF plays a role in the pathogenesis of ischemia/reperfusion-induced small intestinal lesions in rats. Under pentobarbital anesthesia, the superior mesenteric artery was clamped (ischemia) for 75 min, followed by reperfusion with removal of the clamp. After a 24-h reperfusion, the area of hemorrhagic lesions that developed in the small intestine was measured. Urocortin I (CRF receptor 1/2 agonist), astressin (CRF receptor 1/2 antagonist), NBI27914 (CRF receptor 1 antagonist), or astressin 2B (CRF receptor 2 antagonist) was administered i...
October 2016: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/27991798/comfortably-numb-and-back-plasma-metabolomics-reveals-biochemical-adaptations-in-the-hibernating-13-lined-ground-squirrel
#6
Angelo D'Alessandro, Travis Nemkov, Lori K Bogren, Sandra L Martin, Kirk C Hansen
Hibernation is an evolutionary adaptation that affords some mammals the ability to exploit the cold to achieve extreme metabolic depression (torpor) while avoiding ischemia/reperfusion or hemorrhagic shock injuries. Hibernators cycle periodically out of torpor, restoring high metabolic activity. If understood at the molecular level, the adaptations underlying torpor-arousal cycles may be leveraged for translational applications in critical fields such as intensive care medicine. Here, we monitored 266 metabolites to investigate the metabolic adaptations to hibernation in plasma from 13-lined ground squirrels (57 animals, 9 time points)...
December 29, 2016: Journal of Proteome Research
https://www.readbyqxmd.com/read/27980241/therapeutic-strategies-to-attenuate-hemorrhagic-transformation-after-tissue-plasminogen-activator-treatment-for-acute-ischemic-stroke
#7
Masato Kanazawa, Tetsuya Takahashi, Masatoyo Nishizawa, Takayoshi Shimohata
This review focuses on the mechanisms and emerging concepts of stroke and therapeutic strategies for attenuating hemorrhagic transformation (HT) after tissue plasminogen activator (tPA) treatment for acute ischemic stroke (AIS). The therapeutic time window for tPA treatment has been extended. However, the patients who are eligible for tPA treatment are still <5% of all patients with AIS. The risk of serious or fatal symptomatic hemorrhage increases with delayed initiation of treatment. HT is thought to be caused by 1) ischemia/reperfusion injury; 2) the toxicity of tPA itself; 3) inflammation; and/or 4) remodeling factor-mediated effects...
December 13, 2016: Journal of Atherosclerosis and Thrombosis
https://www.readbyqxmd.com/read/27924419/beneficial-effect-of-low-level-laser-therapy-in-acute-lung-injury-after-i-i-r-is-dependent-on-the-secretion-of-il-10-and-independent-of-the-tlr-myd88-signaling
#8
J L Carvalho, A Britto, A P Ligeiro de Oliveira, H Castro-Faria-Neto, R Albertini, E Anatriello, F Aimbire
The use of low-level laser for lung inflammation treatment has been evidenced in animal studies as well as clinical trials. The laser action mechanism seems to involve downregulation of neutrophil chemoattractants and transcription factors. Innate immune responses against microorganisms may be mediated by toll-like receptors (TLR). Intestinal ischemia and reperfusion (i-I/R) lead to bacterial product translocation, such as endotoxin, which consequently activates TLRs leading to intestinal and lung inflammation after gut trauma...
February 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/27884324/postconditioning-with-sevoflurane-ameliorates-spatial-learning-and-memory-deficit-after-hemorrhage-shock-and-resuscitation-in-rats
#9
Xianwen Hu, Jingxian Wang, Qiquan Zhang, Xiaowen Duan, Zhiwu Chen, Ye Zhang
BACKGROUND: Severe hemorrhage shock and resuscitation are a systemic ischemia-reperfusion phenomenon which can induce learning and memory deficit in human and rats. Sevoflurane postconditioning has been proved to offer neuroprotection under different setting of cerebral ischemia-reperfusion in rats. The aim of this study was to investigate whether sevoflurane postconditioning could improve spatial learning and memory ability after hemorrhage shock and resuscitation in rats. METHODS: Thirty-five male rats were randomized into five groups: sham group, shock group, low concentration (sevo1, 1...
December 2016: Journal of Surgical Research
https://www.readbyqxmd.com/read/27863349/trpv1-channels-in-cardiovascular-system-a-double-edged-sword
#10
REVIEW
Puneet Kaur Randhawa, Amteshwar Singh Jaggi
Apart from modulating nociception, there is vital role of TRPV1 channels in modulating atherosclerosis, congestive heart failure, systemic hypertension, pulmonary hypertension, hemorrhagic shock and vascular remodeling. TRPV1 channel activation has shielding effect against the development of atherosclerosis and systemic hypertension. TRPV1 channel activation alleviates the formation of atherosclerotic lesions via increasing the expression of cholesterol efflux regulatory protein, UCP 2 and enhancing autophagy...
February 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/27830023/over-expression-of-heat-shock-protein-70-protects-mice-against-lung-ischemia-reperfusion-injury-through-sirt1-ampk-enos-pathway
#11
Shumei Liu, Junping Xu, Chunfang Fang, Chunjing Shi, Xin Zhang, Bo Yu, Yantong Yin
Lung ischemia/reperfusion injury (LIRI) usually occurs during in lung transplantation and extracorporeal circulation operation and may develop into pulmonary infections, acute rejection and bronchiolitis obliterans syndrome. Recent studies have discovered the protective effect of heat shock protein 70 (HSP70) on various types of injuries. In the present study, we firstly explore the role of over-expressed HSP70 on the protection against LIRI. Lung Wet/Dry (W/D) ratio, biomarkers in the bronchoalveolar lavage fluid (BALF), lung histological changes and apoptosis markers, oxidative products and proinflammatory cytokines in the lung tissues were analyzed...
2016: American Journal of Translational Research
https://www.readbyqxmd.com/read/27816279/efficacy-of-early-superficial-temporal-artery-middle-cerebral-artery-double-anastomoses-for-atherosclerotic-occlusion-in-patients-with-progressing-stroke
#12
Akihiro Inoue, Kanehisa Kohno, Shinji Iwata, Shiro Ohue, Saya Ozaki, Satoko Ninomiya, Hitomi Tomita, Kenji Kamogawa, Kensho Okamoto, Shinya Fukumoto, Haruhisa Ichikawa, Shinji Onoue, Yawara Nakamura, Bungo Okuda
BACKGROUND: We investigated the efficacy of early superficial temporal artery-middle cerebral artery (STA-MCA) double anastomoses for patients with progressing stroke due to atherosclerotic occlusion. MATERIALS AND METHODS: Nine consecutive patients who underwent early STA-MCA double anastomoses were enrolled. All patients presented with progressing stroke despite maximal medical treatment. Cerebral blood flow in 7 patients was analyzed by single-photon emission tomography...
November 2, 2016: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/27812152/the-comparison-of-the-outcomes-between-primary-pci-fibrinolysis-and-no-reperfusion-in-patients-%C3%A2-75-years-old-with-st-segment-elevation-myocardial-infarction-results-from-the-chinese-acute-myocardial-infarction-cami-registry
#13
He Peiyuan, Yang Jingang, Xu Haiyan, Gao Xiaojin, Xian Ying, Wu Yuan, Li Wei, Wang Yang, Tang Xinran, Yan Ruohua, Jin Chen, Song Lei, Zhang Xuan, Fu Rui, Ye Yunqing, Dong Qiuting, Sun Hui, Yan Xinxin, Gao Runlin, Yang Yuejin
BACKGROUND: Only a few randomized trials have analyzed the clinical outcomes of elderly ST-segment elevation myocardial infarction (STEMI) patients (≥ 75 years old). Therefore, the best reperfusion strategy has not been well established. An observational study focused on clinical outcomes was performed in this population. METHODS: Based on the national registry on STEMI patients, the in-hospital outcomes of elderly patients with different reperfusion strategies were compared...
2016: PloS One
https://www.readbyqxmd.com/read/27809248/the-molecular-pathway-of-argon-mediated-neuroprotection
#14
REVIEW
Felix Ulbrich, Ulrich Goebel
The noble gas argon has attracted increasing attention in recent years, especially because of its neuroprotective properties. In a variety of models, ranging from oxygen-glucose deprivation in cell culture to complex models of mid-cerebral artery occlusion, subarachnoid hemorrhage or retinal ischemia-reperfusion injury in animals, argon administration after individual injury demonstrated favorable effects, particularly increased cell survival and even improved neuronal function. As an inert molecule, argon did not show signs of adverse effects in the in vitro and in vivo model used, while being comparably cheap and easy to apply...
October 31, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27774630/redox-dependent-regulation-of-hepatocyte-absent-in-melanoma-2-inflammasome-activation-in-sterile-liver-injury-in-mice
#15
Qian Sun, Patricia Loughran, Richard Shapiro, Indira H Shrivastava, Daniel J Antoine, Tunliang Li, Zhengzheng Yan, Jie Fan, Timothy R Billiar, Melanie J Scott
: Sterile liver inflammation, such as liver ischemia-reperfusion, hemorrhagic shock after trauma, and drug-induced liver injury, is initiated and regulated by endogenous mediators including DNA and reactive oxygen species. Here, we identify a mechanism for redox-mediated regulation of absent in melanoma 2 (AIM2) inflammasome activation in hepatocytes after redox stress in mice, which occurs through interaction with cytosolic high mobility group box 1 (HMGB1). We show that in liver during hemorrhagic shock in mice and in hepatocytes after hypoxia with reoxygenation, cytosolic HMGB1 associates with AIM2 and is required for activation of caspase-1 in response to cytosolic DNA...
January 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/27759558/a-novel-technique-of-subclavian-artery-cannulation-for-venoarterial-extracorporeal-membrane-oxygenation
#16
Umit Kervan, Sinan Sabit Kocabeyoglu, Dogan Emre Sert, Emre Aygün, Kemal Kavasoglu, Mehmet Karahan, Ertekin Utku Unal, Mustafa Pac
OBJECTIVES: The common femoral artery is the standard site for immediate vascular access when initiating adult venoarterial extracorporeal membrane oxygenation. However, this approach is fraught with problems such as femoral artery occlusion, distal limb ischemia, reperfusion injury resulting in compartment syndrome, retroperitoneal hemorrhage, thrombosis, embolization, and most importantly, pulmonary edema. Here, we show our preference of using the subclavian artery with a side graft as a different cannulation technique for outflow of extracorporeal membrane oxygenation, which can avoid complications associated with different access techniques...
October 14, 2016: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/27706770/activation-of-p38-mitogen-activated-protein-kinase-contributes-to-ischemia-reperfusion-in-rat-brain
#17
Y Q Song, H L Zou, Y J Zhao, L Q Yu, Z X Tan, R Kong
Inflammation plays an important role in cerebral ischemia reperfusion, which can cause severe damage to the brain and may lead to cerebral hemorrhage transformation. p38-mitogen-activated protein kinase (p38mapk) has been implicated in the etiology of a number of diseases because it is a cause of inflammation, but comparatively little research has been carried out into its role in the etiology of ischemia reperfusion. We investigated the expression of p38mapk in cerebral ischemia reperfusion to gain a better understanding of its potential role in hemorrhagic transformation (HT)...
September 23, 2016: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/27690096/effects-of-n-3-pufas-on-intestinal-mucosa-innate-immunity-and-intestinal-microbiota-in-mice-after-hemorrhagic-shock-resuscitation
#18
Feng Tian, Xuejin Gao, Li Zhang, Xinying Wang, Xiao Wan, Tingting Jiang, Chao Wu, Jingcheng Bi, Qiucheng Lei
n-3 polyunsaturated fatty acids (PUFAs) can improve the function of the intestinal barrier after damage from ischemia-reperfusion or hemorrhagic shock resuscitation (HSR). However, the effects of n-3 PUFAs on intestinal microbiota and the innate immunity of the intestinal mucosa after HSR remain unclear. In the present study, 40 C57BL/6J mice were randomly assigned to five groups: control, sham, HSR, HSR + n-3 PUFAs and HSR + n-6 PUFAs. Mice were sacrificed 12 h after HSR. Liver, spleen, mesenteric lymph nodes and terminal ileal tissues were collected...
2016: Nutrients
https://www.readbyqxmd.com/read/27677785/complement-c3-inhibitor-cp40-attenuates-xenoreactions-in-pig%C3%A2-hearts-perfused-with-human-blood
#19
Jan-Michael Abicht, Ioannis Kourtzelis, Bruno Reichart, Sophia Koutsogiannaki, Alexandra Primikyri, John D Lambris, Triantafyllos Chavakis, Lesca Holdt, Alexander Kind, Sonja Guethoff, Tanja Mayr
BACKGROUND: The complement system plays a crucial role in acute xenogeneic reactions after cardiac transplantation. We used an ex vivo perfusion model to investigate the effect of Cp40, a compstatin analog and potent inhibitor of complement at the level of C3. METHODS: Fifteen wild-type pig hearts were explanted, cardiopleged, and reperfused ex vivo after 150 minutes of cold ischemia. Hearts were challenged in a biventricular working heart mode to evaluate cardiac perfusion and function...
September 27, 2016: Xenotransplantation
https://www.readbyqxmd.com/read/27677185/lipoic-acid-use-and-functional-outcomes-after-thrombolysis-in-patients-with-acute-ischemic-stroke-and-diabetes
#20
Kang-Ho Choi, Man-Seok Park, Joon-Tae Kim, Hyung-Seok Kim, Ja-Hae Kim, Tai-Seung Nam, Seong-Min Choi, Seung-Han Lee, Byeong-Chae Kim, Myeong-Kyu Kim, Ki-Hyun Cho
BACKGROUND: Alpha-lipoic acid (aLA) is a strong antioxidant commonly used for treating diabetic polyneuropathy. Previously, we demonstrated the neurorestorative effects of aLA after cerebral ischemia in rats. However, its effects on patients with stroke remain unknown. We investigated whether patients treated with aLA have better functional outcomes after acute ischemic stroke (AIS) and reperfusion therapy than patients not receiving aLA. METHODS: In this retrospective study of 172 prospectively registered patients with diabetes and AIS treated with tissue plasminogen activator (tPA), we investigated the relationship between aLA use and functional outcome both after 3 months and after 1 year...
2016: PloS One
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