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https://www.readbyqxmd.com/read/28510599/selective-inhibition-of-brain-endothelial-rho-kinase-2-provides-optimal-protection-of-an-in-vitro-blood-brain-barrier-from-tissue-type-plasminogen-activator-and-plasmin
#1
Be'eri Niego, Natasha Lee, Pia Larsson, T Michael De Silva, Amanda E-Ling Au, Fiona McCutcheon, Robert L Medcalf
Rho-kinase (ROCK) inhibition, broadly utilised in cardiovascular disease, may protect the blood-brain barrier (BBB) during thrombolysis from rt-PA-induced damage. While the use of nonselective ROCK inhibitors like fasudil together with rt-PA may be hindered by possible hypotensive side-effects and inadequate capacity to block detrimental rt-PA activity in brain endothelial cells (BECs), selective ROCK-2 inhibition may overcome these limitations. Here, we examined ROCK-2 expression in major brain cells and compared the ability of fasudil and KD025, a selective ROCK-2 inhibitor, to attenuate rt-PA-induced BBB impairment in an in vitro human model...
2017: PloS One
https://www.readbyqxmd.com/read/28489816/endothelial-tlr4-and-the-microbiome-drive-cerebral-cavernous-malformations
#2
Alan T Tang, Jaesung P Choi, Jonathan J Kotzin, Yiqing Yang, Courtney C Hong, Nicholas Hobson, Romuald Girard, Hussein A Zeineddine, Rhonda Lightle, Thomas Moore, Ying Cao, Robert Shenkar, Mei Chen, Patricia Mericko, Jisheng Yang, Li Li, Ceylan Tanes, Dmytro Kobuley, Urmo Võsa, Kevin J Whitehead, Dean Y Li, Lude Franke, Blaine Hart, Markus Schwaninger, Jorge Henao-Mejia, Leslie Morrison, Helen Kim, Issam A Awad, Xiangjian Zheng, Mark L Kahn
Cerebral cavernous malformations (CCMs) are a cause of stroke and seizure for which no effective medical therapies yet exist. CCMs arise from the loss of an adaptor complex that negatively regulates MEKK3-KLF2/4 signalling in brain endothelial cells, but upstream activators of this disease pathway have yet to be identified. Here we identify endothelial Toll-like receptor 4 (TLR4) and the gut microbiome as critical stimulants of CCM formation. Activation of TLR4 by Gram-negative bacteria or lipopolysaccharide accelerates CCM formation, and genetic or pharmacologic blockade of TLR4 signalling prevents CCM formation in mice...
May 10, 2017: Nature
https://www.readbyqxmd.com/read/28478980/use-of-geospatial-modeling-to-evaluate-the-impact-of-telestroke-on-access-to-stroke-thrombolysis-in-ontario
#3
Lauren Jewett, Ario Mirian, Ben Connolly, Frank L Silver, Demetrios J Sahlas
BACKGROUND: The treatment of acute ischemic stroke in Ontario is coordinated through a network of stroke centers, supplemented by emergency telemedicine consultations to nonstroke centers through the Ontario Telemedicine Network's province-wide Telestroke program. Using geoinformatics, we sought to evaluate the overall impact of Telestroke on access to stroke thrombolysis in Ontario. METHODS: Ontario population data (census) were used to overlay polygons created by Service Area Analysis using ArcGIS 10...
May 3, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28475606/shaping-innovations-in-long-term-care-for-stroke-survivors-with-multimorbidity-through-stakeholder-engagement
#4
Euan Sadler, Talya Porat, Iain Marshall, Uy Hoang, Vasa Curcin, Charles D A Wolfe, Christopher McKevitt
BACKGROUND: Stroke, like many long-term conditions, tends to be managed in isolation of its associated risk factors and multimorbidity. With increasing access to clinical and research data there is the potential to combine data from a variety of sources to inform interventions to improve healthcare. A 'Learning Health System' (LHS) is an innovative model of care which transforms integrated data into knowledge to improve healthcare. The objective of this study is to develop a process of engaging stakeholders in the use of clinical and research data to co-produce potential solutions, informed by a LHS, to improve long-term care for stroke survivors with multimorbidity...
2017: PloS One
https://www.readbyqxmd.com/read/28475487/can-somatosensory-electrical-stimulation-relieve-spasticity-in-post-stroke-patients-a-tms-pilot-study
#5
André Salles Cunha Peres, Victor Hugo Souza, João Marcos Yamasaki Catunda, Kelley Cristine Mazzeto-Betti, Taiza Elaine Grespan Santos-Pontelli, Claudia Domingues Vargas, Oswaldo Baffa, Draulio Barros de Araújo, Octávio Marques Pontes-Neto, João Pereira Leite, Marco Antonio Cavalcanti Garcia
Evidence suggests that somatosensory electrical stimulation (SES) may decrease the degree of spasticity from neural drives, although there is no agreement between corticospinal modulation and the level of spasticity. Thus, stroke patients and healthy subjects were submitted to SES (3 Hz) for 30' on the impaired and dominant forearms, respectively. Motor evoked potentials induced by single-pulse transcranial magnetic stimulation were collected from two forearm muscles before and after SES. The passive resistance of the wrist joint was measured with an isokinetic system...
May 5, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28473445/estrogen-receptor-control-of-atherosclerotic-calcification-and-smooth-muscle-cell-osteogenic-differentiation
#6
Lucinda S McRobb, Kristine C Y McGrath, Tania Tsatralis, Eleanore C Liong, Joanne T M Tan, Gillian Hughes, David J Handelsman, Alison K Heather
OBJECTIVE: Vascular calcification is associated with increased risk of myocardial infarction and stroke. The objective of this work was to examine the ability of 17β-estradiol (E2) to stimulate calcification of vascular smooth muscle cells (VSMC) in vivo, using aged apolipoprotein E-null mice with advanced atherosclerotic lesions, and subsequently to explore underlying mechanisms in vitro. APPROACH AND RESULTS: Silastic E2 capsules were implanted into male and female apolipoprotein E-null mice aged 34 weeks...
May 4, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28465505/hypertension-reduces-soluble-guanylyl-cyclase-expression-in-the-mouse-aorta-via-the-notch-signaling-pathway
#7
Catarina Rippe, Baoyi Zhu, Katarzyna K Krawczyk, Ed Van Bavel, Sebastian Albinsson, Jonas Sjölund, Erik N T P Bakker, Karl Swärd
Hypertension is a dominating risk factor for cardiovascular disease. To characterize the genomic response to hypertension, we administered vehicle or angiotensin II to mice and performed gene expression analyses. AngII treatment resulted in a robust increase in blood pressure and altered expression of 235 genes in the aorta, including Gucy1a3 and Gucy1b3 which encode subunits of soluble guanylyl cyclase (sGC). Western blotting and immunohistochemistry confirmed repression of sGC associated with curtailed relaxation via sGC activation...
May 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28462608/traumatic-brain-injury-occludes-training-dependent-cortical-reorganization-in-the-contralesional-hemisphere
#8
David Pruitt, Tanya Danaphongse, Ariel Schmid, Robert Morrison, Michael Kilgard, Robert L Rennaker Ii, Seth Hays
Rehabilitative training drives plasticity in the ipsilesional (injured) motor cortex that is believed to support recovery of motor function after either stroke or TBI. In addition, adaptive plasticity in the contralesional (uninjured) motor cortex has been well-characterized in the context of stroke. While similar rehabilitation-dependent plasticity in the uninjured hemisphere may occur after TBI, this has yet to be thoroughly explored. In this study, we investigated the effects of TBI and rehabilitative training on reorganization of movement representations in the uninjured motor cortex...
May 2, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28454124/influence-of-the-rehabilitation-outcome-on-returning-to-drive-after-neurological-impairment
#9
Urša Š Čižman, Gaj Vidmar, Petra Drnovšek
In traumatic brain injury (TBI) and stroke rehabilitation, the question of reintegration of the driver into traffic is faced very often. Driving is an important domain and for some patients, return to driving represents a crucial event for community inclusion. The aim of our study was to examine the utility of Glasgow Coma Scale within the first 24 h of injury and the Functional Independence Measure (FIM) at rehabilitation admission for predicting the return to driving. We included 72 patients after TBI or stroke...
June 2017: International Journal of Rehabilitation Research. Revue Internationale de Recherches de Réadaptation
https://www.readbyqxmd.com/read/28439750/hospital-heterogeneity-what-drives-the-quality-of-health-care
#10
Manhal Ali, Reza Salehnejad, Mohaimen Mansur
A major feature of health care systems is substantial variation in health care quality across hospitals. The quality of stroke care widely varies across NHS hospitals. We investigate factors that may explain variations in health care quality using measures of quality of stroke care. We combine NHS trust data from the National Sentinel Stroke Audit with other data sets from the Office for National Statistics, NHS and census data to capture hospitals' human and physical assets and organisational characteristics...
April 24, 2017: European Journal of Health Economics: HEPAC: Health Economics in Prevention and Care
https://www.readbyqxmd.com/read/28436703/in-the-driver-s-seat-development-and-implementation-of-an-e-learning-module-on-return-to-driving-after-stroke
#11
Janet Frith, Isobel Hubbard, Carole James, Helen Warren-Forward
Gaps exist in the knowledge of return-to-driving guidelines, and education is needed for Australian health professionals working in the field of stroke. In this paper, authors evaluate the implementation of an e-learning module. A pre- and post-module knowledge test and survey were used to assess the e-module's success in achieving its learning objectives. Initially, 204 learners completed the module, with 68% of learners scoring 100% in the post-module knowledge test. Only 12 learners completed the survey...
April 2017: Occupational Therapy in Health Care
https://www.readbyqxmd.com/read/28408965/phospholipase-c-related-catalytically-inactive-protein-can-regulate-obesity-a-state-of-peripheral-inflammation
#12
REVIEW
Yosuke Yamawaki, Kana Oue, Satomi Shirawachi, Satoshi Asano, Kae Harada, Takashi Kanematsu
Obesity is defined as abnormal or excessive fat accumulation. Chronic inflammation in fat influences the development of obesity-related diseases. Many reports state that obesity increases the risk of morbidity in many diseases, including hypertension, dyslipidemia, type 2 diabetes, coronary heart disease, stroke, sleep apnea, and breast, prostate and colon cancers, leading to increased mortality. Obesity is also associated with chronic neuropathologic conditions such as depression and Alzheimer's disease. However, there is strong evidence that weight loss reduces these risks, by limiting blood pressure and improving levels of serum triglycerides, total cholesterol, low-density lipoprotein (LDL)-cholesterol, and high-density lipoprotein (HDL)-cholesterol...
February 2017: Japanese Dental Science Review
https://www.readbyqxmd.com/read/28404729/wings-as-impellers-honey-bees-co-opt-flight-system-to-induce-nest-ventilation-and-disperse-pheromones
#13
Jacob M Peters, Nick Gravish, Stacey A Combes
Honey bees (Apis mellifera) are remarkable fliers that regularly carry heavy loads of nectar and pollen, supported by a flight system - the wings, thorax and flight muscles - that one might assume is optimized for aerial locomotion. However, honey bees also use this system to perform other crucial tasks that are unrelated to flight. When ventilating the nest, bees grip the surface of the comb or nest entrance and fan their wings to drive airflow through the nest, and a similar wing-fanning behavior is used to disperse volatile pheromones from the Nasonov gland...
April 12, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28396569/local-ancestry-and-clinical-cardiovascular-events-among-african-americans-from-the-atherosclerosis-risk-in-communities-study
#14
Aditi Shendre, Marguerite R Irvin, Howard Wiener, Degui Zhi, Nita A Limdi, Edgar T Overton, Sadeep Shrestha
BACKGROUND: Local ancestry in relation to clinical cardiovascular events (CVEs) among African Americans can provide insight into their genetic susceptibility to the disease. METHODS AND RESULTS: We examined local European ancestry (LEA) association with CVEs among 3000 African Americans from the Atherosclerosis Risk in Communities Study (ARIC). We estimated LEA using Local Ancestry Inference in adMixed Populations using Linkage Disequilibrium (LAMP-LD) and examined its association with myocardial infarction, stroke, coronary heart disease and its composite and cardiovascular disease composite using logistic regression...
April 10, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28395980/long-term-outcome-and-risk-assessment-in-premature-acute-myocardial-infarction-a-10-year-follow-up-study
#15
Max-Paul Winter, Hermann Blessberger, Arman Alimohammadi, Noemi Pavo, Kurt Huber, Johann Wojta, Irene M Lang, Franz Wiesbauer, Georg Goliasch
BACKGROUND: Premature acute myocardial infarction (AMI) is a rare disease carrying significant morbidity and mortality. Existing data on outcome in these patients is based on retrospective analysis of angiographic reports or refer to time periods with incomparable treatment regimes, making them unusable for risk assessment in times of widespread use of reperfusion therapy. Aim of this study was to assess the outcome of premature AMI in a prospectively recruited study population enrolled in the times of modern reperfusion therapy...
April 2, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28385306/detection-of-atherosclerotic-inflammation-by-68-ga-dotatate-pet-compared-to-18-f-fdg-pet-imaging
#16
Jason M Tarkin, Francis R Joshi, Nicholas R Evans, Mohammed M Chowdhury, Nichola L Figg, Aarti V Shah, Lakshi T Starks, Abel Martin-Garrido, Roido Manavaki, Emma Yu, Rhoda E Kuc, Luigi Grassi, Roman Kreuzhuber, Myrto A Kostadima, Mattia Frontini, Peter J Kirkpatrick, Patrick A Coughlin, Deepa Gopalan, Tim D Fryer, John R Buscombe, Ashley M Groves, Willem H Ouwehand, Martin R Bennett, Elizabeth A Warburton, Anthony P Davenport, James H F Rudd
BACKGROUND: Inflammation drives atherosclerotic plaque rupture. Although inflammation can be measured using fluorine-18-labeled fluorodeoxyglucose positron emission tomography ([(18)F]FDG PET), [(18)F]FDG lacks cell specificity, and coronary imaging is unreliable because of myocardial spillover. OBJECTIVES: This study tested the efficacy of gallium-68-labeled DOTATATE ((68)Ga-DOTATATE), a somatostatin receptor subtype-2 (SST2)-binding PET tracer, for imaging atherosclerotic inflammation...
April 11, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28384147/trends-in-new-zealand-stroke-thrombolysis-treatment-rates
#17
Qiliang Liu, Annemarei Anna Ranta, Ginny Abernethy, P Alan Barber
AIMS: To describe trends in treatment delays and short-term outcome over the first 18 months of the New Zealand stroke thrombolysis register. METHODS: The National Stroke Network introduced a central register of all ischaemic stroke patients treated with intravenous alteplase on January 1, 2015. The aim was to increase thrombolysis treatment rates and drive improvements in safety. RESULTS: From January 1, 2015 to June 30, 2016, alteplase was given to 623 patients [344 men, mean (range) age 70 (22-98) years] out of a total of 8,857 ischaemic and unspecified stroke patients, giving a thrombolysis rate of 7...
April 7, 2017: New Zealand Medical Journal
https://www.readbyqxmd.com/read/28382159/a-crucial-role-of-cxcl14-for-promoting-regulatory-t-cells-activation-in-stroke
#18
Hsu-Tung Lee, Shih-Ping Liu, Chen-Huan Lin, Sophie Wei Lee, Chung Y Hsu, Huey-Kang Sytwu, Chia-Hung Hsieh, Woei-Cherng Shyu
Inflammatory processes have a detrimental role in the pathophysiology of ischemic stroke. However, little is known about the endogenous anti-inflammatory mechanisms in ischemic brain. Here, we identify CXCL14 as a critical mediator of these mechanisms. CXCL14 levels were upregulated in the ischemic brains of humans and rodents. Moreover, hypoxia inducible factor-1α (HIF-1α) drives hypoxia- or cerebral ischemia (CI)-dependent CXCL14 expression via directly binding to the CXCL14 promoter. Depletion of CXCL14 inhibited the accumulation of immature dendritic cells (iDC) or regulatory T cells (Treg) and increased the infarct volume, whereas the supplementation of CXCL14 had the opposite effects...
2017: Theranostics
https://www.readbyqxmd.com/read/28377155/level-of-need-divertibility-and-outcomes-of-newly-admitted-nursing-home-residents
#19
Peter Tanuseputro, Amy Hsu, Kerry Kuluski, Mathieu Chalifoux, Melissa Donskov, Sarah Beach, Peter Walker
OBJECTIVES: To describe the level of need and divertibility of newly admitted nursing home residents, describe the factors that drive need, and describe the outcomes of residents across different levels of need. DESIGN: Retrospective cohort study. SETTING: A total of 640 publicly funded nursing homes (also known as long-term care facilities) in Ontario, Canada. PARTICIPANTS: All newly admitted residents between January 1, 2010 and March 1, 2012...
April 1, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28367109/low-latency-estimation-of-motor-intentions-to-assist-reaching-movements-along-multiple-sessions-in-chronic-stroke-patients-a-feasibility-study
#20
Jaime Ibáñez, Esther Monge-Pereira, Francisco Molina-Rueda, J I Serrano, Maria D Del Castillo, Alicia Cuesta-Gómez, María Carratalá-Tejada, Roberto Cano-de-la-Cuerda, Isabel M Alguacil-Diego, Juan C Miangolarra-Page, Jose L Pons
Background: The association between motor-related cortical activity and peripheral stimulation with temporal precision has been proposed as a possible intervention to facilitate cortico-muscular pathways and thereby improve motor rehabilitation after stroke. Previous studies with patients have provided evidence of the possibility to implement brain-machine interface platforms able to decode motor intentions and use this information to trigger afferent stimulation and movement assistance. This study tests the use a low-latency movement intention detector to drive functional electrical stimulation assisting upper-limb reaching movements of patients with stroke...
2017: Frontiers in Neuroscience
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