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Stroke reperfusion

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https://www.readbyqxmd.com/read/28097803/regulation-of-mrna-following-brain-ischemia-and-reperfusion
#1
REVIEW
Donald J DeGracia
There is growing appreciation that mRNA regulation plays important roles in disease and injury. mRNA regulation and ribonomics occur in brain ischemia and reperfusion (I/R) following stroke and cardiac arrest and resuscitation. It was recognized over 40 years ago that translation arrest (TA) accompanies brain I/R and is now recognized as part of the intrinsic stress responses triggered in neurons. However, neuron death correlates to a prolonged TA in cells fated to undergo delayed neuronal death (DND). Dysfunction of mRNA regulatory processes in cells fated to DND prevents them from translating stress-induced mRNAs such as heat shock proteins...
January 17, 2017: Wiley Interdisciplinary Reviews. RNA
https://www.readbyqxmd.com/read/28097310/combined-intravenous-thrombolysis-and-thrombectomy-vs-thrombectomy-alone-for-acute-ischemic-stroke-a-pooled-analysis-of-the-swift-and-star-studies
#2
Jonathan M Coutinho, David S Liebeskind, Lee-Anne Slater, Raul G Nogueira, Wayne Clark, Antoni Dávalos, Alain Bonafé, Reza Jahan, Urs Fischer, Jan Gralla, Jeffrey L Saver, Vitor M Pereira
Importance: Mechanical thrombectomy (MT) improves clinical outcomes in patients with acute ischemic stroke (AIS) caused by a large vessel occlusion. However, it is not known whether intravenous thrombolysis (IVT) is of added benefit in patients undergoing MT. Objective: To examine whether treatment with IVT before MT with a stent retriever is beneficial in patients undergoing MT. Design, Setting, and Participants: This post hoc analysis used data from 291 patients treated with MT included in 2 large, multicenter, prospective clinical trials that evaluated MT for AIS (Solitaire With the Intention for Thrombectomy performed from January 1, 2010, through December 31, 2011, and Solitaire Flow Restoration Thrombectomy for Acute Revascularization from January 1, 2010, through December 31, 2012)...
January 9, 2017: JAMA Neurology
https://www.readbyqxmd.com/read/28093478/long-non-coding-rna-malat1-regulates-cerebrovascular-pathologies-in-ischemic-stroke
#3
Xuejing Zhang, Xuelian Tang, Kai Liu, Milton H Hamblin, Ke-Jie Yin
: The study is designed to determine the role of long non-coding RNA (lncRNA), metastasis associated lung adenocarcinoma transcript 1 (Malat1), in ischemic stroke outcome. Primary mouse brain microvascular endothelial cells (BMECs) were cultured and treated with Malat1 GapmeR prior to 16h oxygen and glucose depravation (OGD). Cell death was assayed by LDH and MTT methods. Malat1 knockout and wildtype mice were subjected to 1h of middle cerebral artery occlusion (MCAO) and 24-72h of reperfusion...
January 16, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28089562/sequential-multiple-assignment-randomized-trials-an-opportunity-for-improved-design-of-stroke-reperfusion-trials
#4
William J Meurer, Nicholas J Seewald, Kelley Kidwell
BACKGROUND: Modern clinical trials in stroke reperfusion fall into 2 categories: alternative systemic pharmacological regimens to alteplase and "rescue" endovascular approaches using targeted thrombectomy devices and/or medications delivered directly for persistently occluded vessels. Clinical trials in stroke have not evaluated how initial pharmacological thrombolytic management might influence subsequent rescue strategy. A sequential multiple assignment randomized trial (SMART) is a novel trial design that can test these dynamic treatment regimens and lead to treatment guidelines that more closely mimic practice...
January 12, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28089539/reperfusion-therapy-in-patients-with-acute-ischaemic-stroke-caused-by-cervical-artery-dissection
#5
L A Crespo Araico, R Vera Lechuga, A Cruz-Culebras, C Matute Lozano, A de Felipe Mimbrera, P Agüero Rabes, E Viedma Guiard, C Estévez Fraga, J Masjuan Vallejo
INTRODUCTION: Cervical artery dissection (CAD) is responsible for up to 20% of all ischaemic strokes in patients younger than 45. The benefits of acute-phase reperfusion therapy in these patients have yet to be confirmed. METHODS: We conducted a retrospective review of patients with CAD admitted to a comprehensive stroke centre between 2010 and 2015. We recorded baseline clinical characteristics, treatments, functional outcomes, and mortality. RESULTS: We identified 35 cases of CAD (23 carotid/12 vertebral); mean age was 43...
January 12, 2017: Neurología: Publicación Oficial de la Sociedad Española de Neurología
https://www.readbyqxmd.com/read/28087473/salvianolic-acids-for-injection-safi-suppresses-inflammatory-responses-in-activated-microglia-to-attenuate-brain-damage-in-focal-cerebral-ischemia
#6
Pengwei Zhuang, Yanjun Wan, Shihan Geng, Ying He, Bo Feng, Zhengliang Ye, Dazheng Zhou, Dekun Li, Hongjun Wei, Hongyan Li, Yanjun Zhang, Aichun Ju
BACKGROUND: Inflammatory reactions induced by microglia in the brain play crucial roles in ischemia/reperfusion (I/R) cerebral injuries. Microglia activation has been shown to be closely related to TLR4/NF-κB signal pathways. Salvianolic acids for injection (SAFI) have been used in clinical practice to treat ischemic stroke with reported neuroprotective effects; however, the underlying mechanisms are still uncertain. OBJECTIVE AND METHODS: First, we studied the effect of SAFI on inflammatory responses in LPS-stimulated BV-2 microglia...
January 10, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28079797/case-report-rapid-improvement-of-crossed-cerebellar-diaschisis-after-intravascular-laser-irradiation-of-blood-in-a-case-of-stroke
#7
Wan-Hua Yang, Shiou-Ping Lin, Shin-Tsu Chang
RATIONALE: Crossed cerebellar diaschisis (CCD) is a poor prognostic factor after stroke because without immediate cerebral reperfusion no further improvements in the patient's condition can be achieved. We investigated the clinical effects of intravascular laser irradiation therapy (ILIB) on CCD and evaluated the therapeutic effect in the sub-acute post-stroke stage. PATIENT CONCERNS: The 77-year-old male with cerebral infarction in the territory of the right anterior cerebral artery only underwent conservative treatment including hydration and aspirin in the acute post-stroke stage...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28069373/memantine-attenuates-cell-apoptosis-by-suppressing-the-calpain-caspase-3-pathway-in-an-experimental-model-of-ischemic-stroke
#8
Bin Chen, Guoxiang Wang, Weiwei Li, Weilin Liu, Ruhui Lin, Jing Tao, Min Jiang, Lidian Chen, Yun Wang
Ischemic stroke, the second leading cause of death worldwide, leads to excessive glutamate release, over-activation of N-methyl-D-aspartate receptor (NMDAR), and massive influx of calcium (Ca(2+)), which may activate calpain and caspase-3, resulting in cellular damage and death. Memantine is an uncompetitive NMDAR antagonist with low-affinity/fast off-rate. We investigated the potential mechanisms through which memantine protects against ischemic stroke in vitro and in vivo. Middle cerebral artery occlusion-reperfusion (MCAO) was performed to establish an experimental model of ischemic stroke...
January 6, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28068417/preserved-collateral-blood-flow-in-the-endovascular-m2cao-model-allows-for-clinically-relevant-profiling-of-injury-progression-in-acute-ischemic-stroke
#9
Philip Little, Ola Kvist, Rikard Grankvist, Stefan Jonsson, Peter Damberg, Michael Söderman, Fabian Arnberg, Staffan Holmin
Interventional treatment regimens have increased the demand for accurate understanding of the progression of injury in acute ischemic stroke. However, conventional animal models severely inhibit collateral blood flow and mimic the malignant infarction profile not suitable for treatment. The aim of this study was to provide a clinically relevant profile of the emergence and course of ischemic injury in cases suitable for acute intervention, and was achieved by employing a M2 occlusion model (M2CAO) that more accurately simulates middle cerebral artery (MCA) occlusion in humans...
2017: PloS One
https://www.readbyqxmd.com/read/28064357/ischemic-stroke-experimental-models-and-reality
#10
REVIEW
Clemens J Sommer
The vast majority of cerebral stroke cases are caused by transient or permanent occlusion of a cerebral blood vessel ("ischemic stroke") eventually leading to brain infarction. The final infarct size and the neurological outcome depend on a multitude of factors such as the duration and severity of ischemia, the existence of collateral systems and an adequate systemic blood pressure, etiology and localization of the infarct, but also on age, sex, comorbidities with the respective multimedication and genetic background...
January 7, 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/28063459/cardiac-remodeling-following-reperfused-acute-myocardial-infarction-is-linked-to-the-concomitant-evolution-of-vascular-function-as-assessed-by-cardiovascular-magnetic-resonance
#11
Olivier Huttin, Damien Mandry, Romain Eschalier, Lin Zhang, Emilien Micard, Freddy Odille, Marine Beaumont, Renaud Fay, Jacques Felblinger, Edoardo Camenzind, Faïez Zannad, Nicolas Girerd, Pierre Y Marie
BACKGROUND: Left ventricular (LV) remodeling following acute myocardial infarction (MI) is difficult to predict at an individual level although a possible interfering role of vascular function has yet to be considered to date. This study aimed to determine the extent to which this LV remodeling is influenced by the concomitant evolution of vascular function and LV loading conditions, as assessed by phase-contrast Cardiovascular Magnetic Resonance (CMR) of the ascending aorta. METHODS: CMR was performed in 121 patients, 2-4 days after reperfusion of a first ST-segment elevation myocardial infarction and 6 months thereafter...
January 4, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28062859/outcomes-after-direct-thrombectomy-or-combined-intravenous-and-endovascular-treatment-are-not-different
#12
Sònia Abilleira, Aida Ribera, Pedro Cardona, Marta Rubiera, Elena López-Cancio, Sergi Amaro, Ana Rodríguez-Campello, Pol Camps-Renom, David Cánovas, Maria Angels de Miquel, Alejandro Tomasello, Sebastian Remollo, Antonio López-Rueda, Elio Vivas, Joan Perendreu, Miquel Gallofré
BACKGROUND AND PURPOSE: Whether intravenous thrombolysis adds a further benefit when given before endovascular thrombectomy (EVT) is unknown. Furthermore, intravenous thrombolysis delays time to groin puncture, mainly among drip and ship patients. METHODS: Using region-wide registry data, we selected cases that received direct EVT or combined intravenous thrombolysis+EVT for anterior circulation strokes between January 2011 and October 2015. Treatment effect was estimated by stratification on a propensity score...
January 6, 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
#13
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)...
November 10, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28059661/intravenous-infusion-of-mesenchymal-stem-cells-inhibits-intracranial-hemorrhage-after-recombinant-tissue-plasminogen-activator-therapy-for-transient-middle-cerebral-artery-occlusion-in-rats
#14
Masahito Nakazaki, Masanori Sasaki, Yuko Kataoka-Sasaki, Shinichi Oka, Takahiro Namioka, Ai Namioka, Rie Onodera, Junpei Suzuki, Yuichi Sasaki, Hiroshi Nagahama, Takeshi Mikami, Masahiko Wanibuchi, Jeffery D Kocsis, Osamu Honmou
OBJECTIVE Reperfusion therapy with intravenous recombinant tissue plasminogen activator (rtPA) is the standard of care for acute ischemic stroke. However, hemorrhagic complications can result. Intravenous infusion of mesenchymal stem cells (MSCs) reduces stroke volume and improves behavioral function in experimental stroke models. One suggested therapeutic mechanism is inhibition of vascular endothelial dysfunction. The objective of this study was to determine whether MSCs suppress hemorrhagic events after rtPA therapy in the acute phase of transient middle cerebral artery occlusion (tMCAO) in rats...
January 6, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28057555/reactive-astrogliosis-in-stroke-contributions-of-astrocytes-to-recovery-of-neurological-function
#15
REVIEW
Neil R Sims, Wai Ping Yew
Alterations in neuronal connectivity, particularly in the "peri-infarct" tissue adjacent to the region of ischemic damage, are important contributors to the spontaneous recovery of function that commonly follows stroke. Peri-infarct astrocytes undergo reactive astrogliosis and play key roles in modulating the adaptive responses in neurons. This reactive astrogliosis shares many features with that induced by other forms of damage to the central nervous system but also differs in details that potentially influence neurological recovery...
January 2, 2017: Neurochemistry International
https://www.readbyqxmd.com/read/28056920/huatuo-zaizao-pill-promotes-functional-recovery-and-neurogenesis-after-cerebral-ischemia-reperfusion-in-rats
#16
Sijin Duan, Tian Wang, Jianqiao Zhang, Minmin Li, Chengwen Lu, Lijie Wang, Yan Zou, Fenghua Fu
BACKGROUND: Ischemic stroke is the third leading cause of death in adults worldwide and is the first leading cause of long-term disability. Neurogenesis plays an important role in promoting behavioral recovery after stroke. Huatuo Zaizao pill (HT), a traditional Chinese medicine, has been used clinically in China to promote the rehabilitation after stroke, but the underlying mechanism of action was still unclear. This study is to investigate the effects of HT on the functional recovery in a rat model of cerebral ischemia-reperfusion (I/R) injury, and the potential molecular mechanisms...
January 5, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28054643/network-based-approach-to-identify-potential-targets-and-drugs-that-promote-neuroprotection-and-neurorepair-in-acute-ischemic-stroke
#17
Yiwei Wang, Hailong Liu, Yongzhong Lin, Guangming Liu, Hongwei Chu, Pengyao Zhao, Xiaohan Yang, Tiezheng Zheng, Ming Fan, Xuezhong Zhou, Jun Meng, Changkai Sun
Acute ischemic stroke (AIS) accounts for more than 80% of the approximately 610,000 new stroke cases worldwide every year. Both ischemia and reperfusion can cause death, damage, and functional changes of affected nerve cells, and these alterations can result in high rates of disability and mortality. Therefore, therapies aimed at increasing neuroprotection and neurorepair would make significant contributions to AIS management. However, with regard to AIS therapies, there is currently a large gap between experimental achievements and practical clinical solutions (EC-GAP-AIS)...
January 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28054226/picroside-ii-exerts-a-neuroprotective-effect-by-inhibiting-the-mitochondria-cytochrome-c-signal-pathway-following-ischemia-reperfusion-injury-in-rats
#18
Hongyan Zhang, Li Zhai, Tingting Wang, Shan Li, Yunliang Guo
Stroke is a common neurodegenerative disease in the wide world, and mitochondrial defects underlie the pathogenesis of ischemia, especially during reperfusion. Picroside II, the principal active component of Picrorhiza, is a traditional Chinese medicine. Our previous study demonstrated that the best therapeutic dose and time window were injection of picroside II at a dose of 10-20 mg/kg body weight following cerebral ischemia by 1.5-2.0 h. In this paper, the neuroprotective effect and the mechanism of picroside II were investigated, as well as its involvement in antioxidant and mitochondria cytochrome C (CytC) signal pathway following ischemia reperfusion (I/R) injury in rats...
January 4, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28052755/atrial-fibrillation-in-patients-hospitalized-with-acute-myocardial-infarction-analysis-of-the-china-acute-myocardial-infarction-cami-registry
#19
Yan Dai, Jingang Yang, Zhan Gao, Haiyan Xu, Yi Sun, Yuan Wu, Xiaojin Gao, Wei Li, Yang Wang, Runlin Gao, Yuejin Yang
BACKGROUND: The incidence, clinical outcomes and antithrombotic treatment spectrum of atrial fibrillation (AF) in patients hospitalized with acute myocardial infarction (AMI) have not been well studied in Chinese population. METHODS: Twenty-six thousand five hundred ninety-two consecutive patients diagnosed with AMI were enrolled in CAMI registry from January 2013 to September 2014. After excluding 343 patients with uncertain AF status and 1,591 patients transferred out during hospitalization, 24,658 patients were finally included in this study and involved in analysis...
January 4, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28042096/different-response-to-antiepileptic-drugs-according-to-the-type-of-epileptic-events-in-a-neonatal-ischemia-reperfusion-model
#20
Luc Morin, Julie Enderlin, Pierre-Louis Leger, Gaëtan Perrotte, Philippe Bonnin, Nina Dupuis, Olivier Baud, Christiane Charriaut-Marlangue, Stéphane Auvin
Perinatal arterial stroke is the most frequent form of cerebral infarction in children. Neonatal seizures are the most frequent symptom during the neonatal period. The current management of perinatal stroke is based on supportive care. It is currently unknown if treatment of the seizures modifies the outcome, and no clinical studies have focused on seizures during neonatal stroke. We studied the effect of phenobarbital and levetiracetam on an ischemic-reperfusion stroke model in P7 rats using prolonged electroencephalographic recordings and a histologic analysis of the brain (24h after injury)...
December 30, 2016: Neurobiology of Disease
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