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https://www.readbyqxmd.com/read/28646795/offsetting-the-impact-of-smoking-and-e-cigarette-vaping-on-the-cerebrovascular-system-and-stroke-injury-is-metformin-a-viable-countermeasure
#1
Mohammad A Kaisar, Heidi Villalba, Shikha Prasad, Taylor Liles, Ali Ehsan Sifat, Ravi K Sajja, Thomas J Abbruscato, Luca Cucullo
Recently published in vitro and in vivo findings strongly suggest that BBB impairment and increased risk for stroke by tobacco smoke (TS) closely resemble that of type-2 diabetes (2DM) and develop largely in response to common key modulators such oxidative stress (OS), inflammation and alterations of the endogenous antioxidative response system (ARE) regulated by the nuclear factor erythroid 2-related factor (Nrf2). Preclinical studies have also shown that nicotine (the principal e-liquid's ingredient used in e-cigarettes) can also cause OS, exacerbation of cerebral ischemia and secondary brain injury...
June 17, 2017: Redox Biology
https://www.readbyqxmd.com/read/28646445/update-on-neurocritical-care-of-stroke
#2
Jason Siegel, Michael A Pizzi, J Brent Peel, David Alejos, Nnenne Mbabuike, Benjamin L Brown, David Hodge, W David Freeman
PURPOSE OF REVIEW: This review will highlight the recent advancements in acute ischemic stroke diagnosis and treatment, with special attention to new features and recommendations of stroke care in the neurocritical care unit. RECENT FINDINGS: New studies suggest that pre-hospital treatment of stroke with mobile stroke units and telestroke technology may lead to earlier stroke therapy with intravenous tissue plasminogen activator (tPA), and recent studies show tPA can be given in previously contraindicated situations...
August 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28646330/-imaging-of-vessels-supplying-the-brain
#3
REVIEW
S M Schellong, N Abolmaali, B Voigts, C Stelzner
Nowadays, several technically validated modalities are available for imaging both the extracranial and intracranial segments of arteries supplying blood to the brain. In the acute stroke setting, computed tomography (CT) angiography is of utmost importance because it provides the key diagnostic criteria indicative for the use of catheter-based recanalization techniques. Ultrasound imaging of extracranial arteries is most suitable for detecting an underlying stenosis of the internal carotid artery (ICA) in patients with stroke, transient ischemic attacks (TIA), retinal vessel occlusion and amaurosis fugax...
June 23, 2017: Der Internist
https://www.readbyqxmd.com/read/28645895/multiparity-improves-outcomes-after-cerebral-ischemia-in-female-mice-despite-features-of-increased-metabovascular-risk
#4
Rodney M Ritzel, Anita R Patel, Monica Spychala, Rajkumar Verma, Joshua Crapser, Edward C Koellhoffer, Anna Schrecengost, Evan R Jellison, Liang Zhu, Venugopal Reddy Venna, Louise D McCullough
Females show a varying degree of ischemic sensitivity throughout their lifespan, which is not fully explained by hormonal or genetic factors. Epidemiological data suggest that sex-specific life experiences such as pregnancy increase stroke risk. This work evaluated the role of parity on stroke outcome. Age-matched virgin (i.e., nulliparous) and multiparous mice were subjected to 60 min of reversible middle cerebral artery occlusion and evaluated for infarct volume, behavioral recovery, and inflammation. Using an established mating paradigm, fetal microchimeric cells present in maternal mice were also tracked after parturition and stroke...
June 23, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28645780/salvia-miltiorrhiza-bunge-danshen-extract-attenuates-permanent-cerebral-ischemia-through-inhibiting-platelet-activation-in-rats
#5
Yu-Xiang Fei, Si-Qi Wang, Li-Jian Yang, Yan-Ying Qiu, Yi-Ze Li, Wen-Yuan Liu, Tao Xi, Wei-Rong Fang, Yun-Man Li
ETHNOPHARMACOLOGICAL RELEVANCE: Danshen is a crude herbal drug isolated from dried roots of Salvia miltiorrhiza Bunge. This plant is widely used in oriental medicine for the treatment of cardiovascular and cerebrovascular diseases. The supercritical CO2 extract from Danshen (SCED) (57.85%, 5.67% and 4.55% for tanshinone IIA, tanshinone I and cryptotanshinone respectively) was studied in this article, whose potential molecular mechanism remains unclear, especially in anti-thrombosis. AIM OF THE STUDY: The present study was designed to observe the protective effect of SCED on ischemic stroke in rats and to explore the underlying anti-thrombosis mechanism...
June 20, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28645333/sac-1004-a-vascular-leakage-blocker-reduces-cerebral-ischemia-reperfusion-injury-by-suppressing-blood-brain-barrier-disruption-and-inflammation
#6
Haiying Zhang, Joon Ha Park, Sony Maharjan, Jeong Ae Park, Kyu-Sung Choi, Hyojin Park, Yoonjeong Jeong, Ji Hyeon Ahn, In Hye Kim, Jae-Chul Lee, Jeong Hwi Cho, In-Kyu Lee, Choong Hyun Lee, In Koo Hwang, Young-Myeong Kim, Young-Ger Suh, Moo-Ho Won, Young-Guen Kwon
BACKGROUND: Blood-brain barrier (BBB) breakdown and inflammation are critical events in ischemic stroke, contributing to aggravated brain damage. The BBB mainly consists of microvascular endothelial cells sealed by tight junctions to protect the brain from blood-borne substances. Thus, the maintenance of BBB integrity may be a potential target for neuroprotection. Sac-1004, a pseudo-sugar derivative of cholesterol, enhances the endothelial barrier by the stabilization of the cortical actin ring...
June 23, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28644548/repetitive-peripheral-magnetic-stimulation-for-activities-of-daily-living-and-functional-ability-in-people-after-stroke
#7
REVIEW
Ryo Momosaki, Naoki Yamada, Erika Ota, Masahiro Abo
BACKGROUND: Repetitive peripheral magnetic stimulation (rPMS) is a form of therapy that creates painless stimulation of deep muscle structures to improve motor function in people with physical impairment from brain or nerve disorders. Use of rPMS for people after stroke has been identified as a feasible approach to improve activities of daily living and functional ability. However, no systematic reviews have assessed the findings of available trials. The effect and safety of this intervention for people after stroke currently remain uncertain...
June 23, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28644092/single-and-multiple-cardiovascular-biomarkers-in-subjects-without-a-previous-cardiovascular-event
#8
Manan Pareek, Deepak L Bhatt, Muthiah Vaduganathan, Tor Biering-Sørensen, Arman Qamar, Axel Cp Diederichsen, Jacob Eifer Møller, Peter Hindersson, Margrét Leósdóttir, Martin Magnusson, Peter M Nilsson, Michael H Olsen
Aims To assess the incremental value of biomarkers, including N-terminal prohormone of brain natriuretic peptide (NT-proBNP), high-sensitivity troponin T (hs-TnT), high-sensitivity C-reactive protein (hs-CRP), interleukin-6 (IL-6), growth differentiation factor 15 (GDF-15), and procollagen type 1 N-terminal propeptide (P1NP), in predicting incident cardiovascular events and mortality among asymptomatic individuals from the general population, beyond traditional risk factors, including fasting glucose and renal function (cystatin C), medication use, and echocardiographic measures...
January 1, 2017: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/28643997/brain-monitoring-in-adult-and-pediatric-ecmo-patients-the-importance-of-early-and-late-assessments
#9
Roberto Lorusso, Fabio S Taccone, Mirko Belliato, Thijs Delnoij, Paolo Zanatta, Mirjana Cvetkovic, Mark Davidson, Jan Belohlavek, Nashwa Matta, Carl Davis, Hanneke Ijsselstijn, Thomas Mueller, Ralf Muellenbach, Dirk Donker, Piero David, Matteo DI Nardo, Dirk Vlasselaers, Dinis Dos Reis Miranda, Aparna Hoskote
Monitoring brain integrity and neuro-cognitive function is a new and important target for the management of a patient treated with extracorporeal membrane oxygenation (ECMO), in particular because of the increasing awareness of cerebral abnormalities that may potentially occur in this setting. Continuous regular monitoring, as well as repeated assessment for cerebral complications has become an essential element of the ECMO patient management. Besides well-known complications, like bleeding, ischemic stroke, seizures, and brain hypoperfusion, other less defined yet relevant injury and clinical manifestations are increasingly reported and impacting on ECMO patient prognosis at short term...
June 22, 2017: Minerva Anestesiologica
https://www.readbyqxmd.com/read/28643802/optogenetic-rewiring-of-thalamocortical-circuits-to-restore-function-in-the-stroke-injured-brain
#10
Kelly A Tennant, Stephanie L Taylor, Emily R White, Craig E Brown
To regain sensorimotor functions after stroke, surviving neural circuits must reorganize and form new connections. Although the thalamus is critical for processing and relaying sensory information to the cortex, little is known about how stroke affects the structure and function of these connections, or whether a therapeutic approach targeting these circuits can improve recovery. Here we reveal with in vivo calcium imaging that stroke in somatosensory cortex dampens the excitability of surviving thalamocortical circuits...
June 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28643616/advanced-neuroimaging-of-carbon-monoxide-poisoning
#11
Marco Varrassi, Alessandra Di Sibio, Camilla Gianneramo, Marco Perri, Giorgia Saltelli, Alessandra Splendiani, Carlo Masciocchi
Carbon monoxide (CO) inhalation is nowadays the most common cause of fatal poisoning worldwide. CO binds to haemoglobin 230-270 times more avidly than oxygen, thus leading to formation of carboxyhaemoglobin with subsequent reduction of tissue oxygenation. Brain is mainly affected due to its high oxygen requirement. Up to two-thirds of patients who survive the acute phase of this pathology present a delayed leukoencephalopathy, usually in a period ranging from two to 40 days. White matter damage closely relates to long-term prognosis of these patients...
January 1, 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28643603/stroke-like-migraine-attacks-after-radiation-therapy-syndrome-case-report-and-review-of-the-literature
#12
Achint K Singh, Bundhit Tantiwongkosi, Anna-Marieta Moise, Wilson B Altmeyer
A 26-year-old female presented with vision loss accompanied by migraine-like headaches. A contrast-enhanced magnetic resonance imaging of the brain was performed which revealed findings suggestive of stroke-like migraine attacks after radiation therapy (SMART) syndrome. SMART syndrome is a delayed complication of brain radiation characterized by neurologic symptoms including migraine-like headaches, seizures, and hemispheric impairment. The purpose of this article is to make the readers aware of this rare complication of brain irradiation...
January 1, 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28643577/an-assessment-of-advance-relatives-approach-for-brain-death-organ-donation
#13
Carine Michaut, Antoine Baumann, Hélène Gregoire, Corinne Laviale, Gérard Audibert, Xavier Ducrocq
BACKGROUND: Advance announcement of forthcoming brain death has developed to enable intensivists and organ procurement organisation coordinators to more appropriately, and separately from each other, explain to relatives brain death and the subsequent post-mortem organ donation opportunity. Research aim: The aim was to assess how potentially involved healthcare professionals perceived ethical issues surrounding the strategy of advance approach. RESEARCH DESIGN: A multi-centre opinion survey using an anonymous self-administered questionnaire was conducted in the six-member hospitals of the publicly funded East of France regional organ and tissue procurement network called 'Prélor'...
January 1, 2017: Nursing Ethics
https://www.readbyqxmd.com/read/28642678/a-cold-blooded-view-on-adult-neurogenesis
#14
REVIEW
Anabel R Simões, Christa Rhiner
During brain development, highly complex and interconnected neural circuits are established. This intricate wiring needs to be robust to faithfully perform adult brain function throughout life, but at the same time offer room for plasticity to integrate new information. In the mammalian brain, adult-born neurons are produced in restricted niches harboring neural stem cells. In the fruit fly Drosophila, low-level adult neurogenesis arising from a dispersed population of neural progenitors has recently been detected in the optic lobes...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28642352/management-of-brain-arteriovenous-malformations-a-scientific-statement-for-healthcare-professionals-from-the-american-heart-association-american-stroke-association
#15
REVIEW
Colin P Derdeyn, Gregory J Zipfel, Felipe C Albuquerque, Daniel L Cooke, Edward Feldmann, Jason P Sheehan, James C Torner
PURPOSE: The aim of this statement is to review the current data and to make suggestions for the diagnosis and management of both ruptured and unruptured brain arteriovenous malformations. METHODS: The writing group met in person and by teleconference to establish search terms and to discuss narrative text and suggestions. Authors performed their own literature searches of PubMed, Medline, or Embase, specific to their allocated section, through the end of January 2015...
June 22, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28642286/brain-regions-important-for-recovery-after-severe-post-stroke-upper-limb-paresis
#16
Jane M Rondina, Chang-Hyun Park, Nick S Ward
Background The ability to predict outcome after stroke is clinically important for planning treatment and for stratification in restorative clinical trials. In relation to the upper limbs, the main predictor of outcome is initial severity, with patients who present with mild to moderate impairment regaining about 70% of their initial impairment by 3 months post-stroke. However, in those with severe presentations, this proportional recovery applies in only about half, with the other half experiencing poor recovery...
June 22, 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/28641124/neural-repair-by-nt3-chitosan-via-enhancement-of-endogenous-neurogenesis-after-adult-focal-aspiration-brain-injury
#17
Peng Hao, Hongmei Duan, Fei Hao, Lan Chen, Min Sun, Kevin S Fan, Yi Eve Sun, David Williams, Zhaoyang Yang, Xiaoguang Li
The latent regenerative potential of endogenous neural stem/progenitor cells (NSCs) in the adult mammalian brain has been postulated as a likely source for neural repair. However, the inflammatory and inhibitory microenvironment after traumatic brain injury (TBI) prohibits NSCs from generating new functional neurons to restore brain function. Here we report a biodegradable material, chitosan, which, when loaded with neurotrophin-3 (NT3) and injected into the lesion site after TBI, effectively engaged endogenous NSCs to proliferate and migrate to the injury area...
April 26, 2017: Biomaterials
https://www.readbyqxmd.com/read/28640931/ischemia-responsive-protein-94-is-a-key-mediator-of-ischemic-neuronal-injury-induced-microglial-activation
#18
Rajiv Tikamdas, Sarthak Singhal, Ping Zhang, Justin A Smith, Eric G Krause, Stanley M Stevens, Sihong Song, Bin Liu
Neuroinflammation, especially activation of microglia, the key immune cells in the brain, has been proposed to contribute to the pathogenesis of ischemic stroke. However, the dynamics and the potential mediators of microglial activation following ischemic neuronal injury are not well understood. In this study, using oxygen/glucose deprivation and reoxygenation (OGD/R) with neuronal and microglial cell cultures as an in vitro model of ischemic neuronal injury, we set out to identify neuronal factors released from injured neurons that are capable of inducing microglial activation...
June 22, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28640874/risk-factors-are-different-for-deep-and-lobar-remote-hemorrhages-after-intravenous-thrombolysis
#19
Luis Prats-Sanchez, Alejandro Martínez-Domeño, Pol Camps-Renom, Raquel Delgado-Mederos, Daniel Guisado-Alonso, Rebeca Marín, Laura Dorado, Salvatore Rudilosso, Alejandra Gómez-González, Francisco Purroy, Manuel Gómez-Choco, David Cánovas, Dolores Cocho, Moises Garces, Sonia Abilleira, Joan Martí-Fàbregas
BACKGROUND AND PURPOSE: Remote parenchymal haemorrhage (rPH) after intravenous thrombolysis is defined as hemorrhages that appear in brain regions without visible ischemic damage, remote from the area of ischemia causing the initial stroke symptom. The pathophysiology of rPH is not clear and may be explained by different underlying mechanisms. We hypothesized that rPH may have different risk factors according to the bleeding location. We report the variables that we found associated with deep and lobar rPH after intravenous thrombolysis...
2017: PloS One
https://www.readbyqxmd.com/read/28640714/an-unexplored-brain-gut-microbiota-axis-in-stroke
#20
Shu Wen Wen, Connie H Y Wong
Microbiota research, in particular that of the gut, has recently gained much attention in medical research owing to technological advances in metagenomics and metabolomics. Despite this, much of the research direction has focused on long-term or chronic effects of microbiota manipulation on health and disease. In this addendum, we reflect on our recent publication that reported findings addressing a rather unconventional hypothesis. Bacterial pneumonia is highly prevalent and is one of the leading contributors to stroke morbidity and mortality worldwide...
June 22, 2017: Gut Microbes
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