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Biology of stroke

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https://www.readbyqxmd.com/read/29777578/sirt3-deficiency-impairs-neurovascular-recovery-in-ischemic-stroke
#1
Xiao Yang, Ke-Yi Geng, Yan-Shuang Zhang, Jin-Fan Zhang, Ke Yang, Jia-Xiang Shao, Wei-Liang Xia
AIMS: Sirt3 is one member of the NAD+ -dependent protein deacetylase family and plays crucial roles in diverse aspects of mammalian biological function. Then the role of Sirt3 on ischemia stroke is unknown. METHODS: To examine the effect of Sirt3 on ischemic stroke, we performed transient middle cerebral artery occlusion (tMCAO) in adult male Sirt3 knockout (KO) and wild-type (WT) mice. RESULTS: The level of Sirt3 in infarct region is decreased after ischemic stroke...
May 18, 2018: CNS Neuroscience & Therapeutics
https://www.readbyqxmd.com/read/29768943/early-reduced-behavioral-activity-induced-by-large-strokes-affects-the-efficiency-of-enriched-environment-in-rats
#2
Anna-Sophia Wahl, Eva Erlebach, Biagio Brattoli, Uta Büchler, Julia Kaiser, Benjamin V Ineichen, Alice C Mosberger, Shirin Schneeberger, Stefan Imobersteg, Martin Wieckhorst, Martina Stirn, Aileen Schroeter, Bjoern Ommer, Martin E Schwab
The majority of stroke patients develop post-stroke fatigue, a symptom which impairs motivation and diminishes the success of rehabilitative interventions. We show that large cortical strokes acutely reduce activity levels in rats for 1-2 weeks as a physiological response paralleled by signs of systemic inflammation. Rats were exposed early (1-2 weeks) or late (3-4 weeks after stroke) to an individually monitored enriched environment to stimulate self-controlled high-intensity sensorimotor training. A group of animals received Anti-Nogo antibodies for the first two weeks after stroke, a neuronal growth promoting immunotherapy already in clinical trials...
January 1, 2018: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29768278/lower-plasma-klotho-concentrations-are-associated-with-vascular-dementia-but-not-late-onset-alzheimer-s-disease
#3
Gloria Brombo, Francesco Bonetti, Beatrice Ortolani, Mario Luca Morieri, Cristina Bosi, Angelina Passaro, Giovanni B Vigna, Caterina Borgna, Maria Vittoria Arcidicono, Veronica Tisato, Giovanni Zuliani
BACKGROUND: The protein Klotho is involved in biological processes related to longevity, cardiovascular health, and cognition. Serum Klotho levels have been associated with better cognition in animal models; moreover, lower Klotho concentrations in cerebrospinal fluid from subjects with late-onset Alzheimer's disease (LOAD) have been reported. OBJECTIVE: Our study aimed to examine the possible relationship between Klotho plasma concentrations and cognitive status in the elderly...
May 16, 2018: Gerontology
https://www.readbyqxmd.com/read/29763641/ischemic-stroke-across-sexes-what-is-the-status-quo
#4
REVIEW
Luca Liberale, Federico Carbone, Fabrizio Montecucco, Cathérine Gebhard, Thomas F Lüscher, Susanne Wegener, Giovanni G Camici
Stroke prevalence is expected to increase in the next decades due to the aging of the Western population. Ischemic stroke (IS) shows an age- and sex-dependent distribution in which men represent the most affected population within 65 years of age, being passed by post-menopausal women in older age groups. Furthermore, a sexual dimorphism concerning risk factors, presentation and treatment of IS has been widely recognized. In order to address these phenomena, a number of issue have been raised involving both socio-economical and biological factors...
May 12, 2018: Frontiers in Neuroendocrinology
https://www.readbyqxmd.com/read/29761220/transcriptomic-analysis-of-the-harvested-endothelial-cells-in-a-swine-model-of-mechanical-thrombectomy
#5
Nasren Jaff, Rikard Grankvist, Lars Muhl, Arvin Chireh, Mikael Sandell, Stefan Jonsson, Fabian Arnberg, Ulf Eriksson, Staffan Holmin
PURPOSE: In mechanical thrombectomy (MT) for ischemic stroke, endothelial cells (ECs) from intracranial blood vessels adhere to the stent retriever device and can be harvested. However, understanding the molecular biology and the role of the endothelium in different pathological conditions remains insufficient. The purpose of the study was to characterize and analyze the molecular aspect of harvested ECs using cell culture and transcriptomic techniques in an MT swine model relevant to clinical ischemic stroke...
May 14, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29753797/drug-development-for-brain-disorders-why-sex-matters-ischemic-stroke-across-sexes-what-is-the-status-quo
#6
REVIEW
Luca Liberale, Federico Carbone, Fabrizio Montecucco, Cathérine Gebhard, Thomas F Lüscher, Susanne Wegener, Giovanni G Camici
Stroke prevalence is expected to increase in the next decades due to the aging of the Western population. Ischemic stroke (IS) shows an age- and sex-dependent distribution in which men represent the most affected population within 65 years of age, being passed by post-menopausal women in older age groups. Furthermore, a sexual dimorphism concerning risk factors, presentation and treatment of IS has been widely recognized. In order to address these phenomena, a number of issue have been raised involving both socio-economical and biological factors...
May 10, 2018: Frontiers in Neuroendocrinology
https://www.readbyqxmd.com/read/29752699/hiv-and-cardiovascular-disease-update-on-clinical-events-special-populations-and-novel-biomarkers
#7
REVIEW
Kaku So-Armah, Matthew S Freiberg
PURPOSE OF REVIEW: The objective of this review is to provide an update on the link between HIV infection and cardiovascular disease (CVD). We will focus our review mainly on literature describing clinical CVD events and understudied topics of importance. RECENT FINDINGS: Heart failure, peripheral artery disease, and stroke are CVD modalities deserving more attention in the context of HIV infection in the highly active antiretroviral therapy era. Incidence data on clinical CVD from HIV populations in low- and middle-income countries are limited...
May 11, 2018: Current HIV/AIDS Reports
https://www.readbyqxmd.com/read/29750657/circulating-microparticles-in-patients-after-ischemic-stroke-a-systematic-review-and-meta-analysis
#8
Botao Wang, Wang Cai, Zhen Zhang, Hui Zhang, Ke Tang, Qi Zhang, Ximo Wang
Microparticles (MPs), a class of cell products with biological activities, have been found to participate in a series of vascular activities. The aim of this article is to investigate the changes in the concentrations of MPs after ischemic stroke by meta-analysis. According to pre-established criteria, a strict screening of articles was performed through the Medline and Embase databases. Subsequently, the included studies were subjected to quality assessment and data extraction. Finally, a meta-analysis was performed on seven major outcomes from 985 noncerebrovascular disease controls and 988 ischemic stroke patients...
May 11, 2018: Reviews in the Neurosciences
https://www.readbyqxmd.com/read/29742480/clinical-benefits-and-pharmacology-of-scutellarin-a-comprehensive-review
#9
REVIEW
Liping Wang, Qiang Ma
Stroke and myocardial infarction are among the most common causes of mortality and disability in the world. The ischemic injury underlying these illnesses is complex, involving intricate interplays among many biological functions including energy metabolism, vascular regulation, hemodynamics, oxidative stress, inflammation, platelet activation, and tissue repair that take place in a context- and time-dependent manner. The current drug therapy of choice is to timely resupply the blood to the ischemic tissue; but reperfusion may introduce additional harm to the tissue through a process known as ischemia/reperfusion injury...
May 6, 2018: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29739082/molecular-mechanism-exploration-of-ischemic-stroke-by-integrating-mrna-and-mirna-expression-profiles
#10
Jianhong Bao, Saijun Zhou, Sipei Pan, Yang Zhang
BACKGROUND: Stroke is one of the leading causes of death worldwide, and ischemic stroke accounts for about 80 percent of all cases. Ischemic stroke is usually caused by a blockage in an artery to the brain. However, its molecular mechanisms remain largely unclear. The integration of mRNA and miRNA expression patterns is an effective strategy to investigate the potential molecular mechanisms of ischemic stroke in posttranscriptional regulation level. METHODS: The mRNA and miRNA expression data were downloaded from the GEO database...
April 1, 2018: Clinical Laboratory
https://www.readbyqxmd.com/read/29738916/serum-mercury-concentration-and-the-risk-of-ischemic-stroke-the-reasons-for-geographic-and-racial-differences-in-stroke-trace-element-study
#11
Cheng Chen, Pengcheng Xun, Leslie A McClure, John Brockman, Leslie MacDonald, Mary Cushman, Jianwen Cai, Lisa Kamendulis, Jason Mackey, Ka He
BACKGROUND: Although biologically plausible, epidemiological evidence linking exposure to methylmercury with increased risk of ischemic stroke is limited. The effects of methylmercury may be modified by selenium, which is an anti-oxidant that often co-exists with mercury in fish. OBJECTIVES: To examine the association between serum mercury levels with the incidence of ischemic stroke and to explore the possible effect modifications by serum selenium levels and demographic and geographic factors...
May 4, 2018: Environment International
https://www.readbyqxmd.com/read/29733683/biobanking-in-a-challenging-african-environment-unique-experience-from-the-siren-project
#12
Rufus O Akinyemi, Kazeem Akinwande, Samuel Diala, Osi Adeleye, Abiodun Ajose, Kehinde Issa, Dorcas Owusu, Isaac Boamah, Isah Suleiman Yahaya, Abdulraheem Olayemi Jimoh, Lucius Imoh, Gregory Fakunle, Albert Akpalu, Fred Sarfo, Kolawole Wahab, Emmanuel Sanya, Lukman Owolabi, Reginald Obiako, Godwin Osaigbovo, Morenikeji Komolafe, Michael Fawale, Philip Adebayo, Paul Olowoyo, Yahaya Obiabo, Taofiki Sunmonu, Ijezie Chukwuonye, Olayemi Balogun, Basirat Adeoye, Florence Oladele, Peter Olowoniyi, Frederick Adeyemi, Arthur Lezzi, Ajibola Tunde Falayi, Michael Fasanya, Kolawole Ogunwale, Olabisi Adeola, Omolara Olomu, Olumayowa Aridegbe, Ruth Laryea, Ezinne Uvere, Moyinoluwalogo Faniyan, Ezinne Melikam, Raelle Tagge, Onoja Akpa, Joshua Akinyemi, Oyedunni Arulogun, Hemant K Tiwari, Bruce Ovbiagele, Mayowa Owolabi
Africa was previously insufficiently represented in the emerging discipline of biobanking despite commendable early efforts. However, with the Human, Heredity, and Health in Africa (H3Africa) initiative, biorepository science has been bolstered, regional biobanks are springing up, and awareness about biobanks is growing on the continent. The Stroke Investigative Research and Educational Network (SIREN) project is a transnational, multicenter, hospital and community-based study involving over 3000 cases and 3000 controls recruited from 16 sites in Ghana and Nigeria...
May 7, 2018: Biopreservation and Biobanking
https://www.readbyqxmd.com/read/29732560/single-nucleotide-polymorphisms-in-long-noncoding-rna-anril-are-not-associated-with-severe-periodontitis-but-with-adverse-cardiovascular-events-among-patients-with-cardiovascular-disease
#13
S Schulz, L Seitter, K Werdan, B Hofmann, H-G Schaller, A Schlitt, S Reichert
BACKGROUND AND OBJECTIVE: Biological plausibility of an association between severe periodontitis and cardiovascular disease (CVD) has been proven. Genetic characteristics play an important role in both complex inflammatory diseases. Polymorphisms (single nucleotide polymorphisms [SNPs]) in the long noncoding RNA, antisense noncoding RNA in the INK4 locus (ANRIL), were shown to play a leading role in both diseases. The primary objectives of the study were to assess, among cardiovascular (CV angiographically proven ≥50% stenosis of a main coronary artery) patients, the impact of ANRIL SNPs rs133049 and rs3217992 on the severity of periodontitis and the previous history of coronary events, as well as on the occurrence of further adverse CV events...
May 6, 2018: Journal of Periodontal Research
https://www.readbyqxmd.com/read/29724592/potential-genetic-modifiers-of-disease-risk-and-age-at-onset-in-patients-with-frontotemporal-lobar-degeneration-and-grn-mutations-a-genome-wide-association-study
#14
Cyril Pottier, Xiaolai Zhou, Ralph B Perkerson, Matt Baker, Gregory D Jenkins, Daniel J Serie, Roberta Ghidoni, Luisa Benussi, Giuliano Binetti, Adolfo López de Munain, Miren Zulaica, Fermin Moreno, Isabelle Le Ber, Florence Pasquier, Didier Hannequin, Raquel Sánchez-Valle, Anna Antonell, Albert Lladó, Tammee M Parsons, NiCole A Finch, Elizabeth C Finger, Carol F Lippa, Edward D Huey, Manuela Neumann, Peter Heutink, Matthis Synofzik, Carlo Wilke, Robert A Rissman, Jaroslaw Slawek, Emilia Sitek, Peter Johannsen, Jørgen E Nielsen, Yingxue Ren, Marka van Blitterswijk, Mariely DeJesus-Hernandez, Elizabeth Christopher, Melissa E Murray, Kevin F Bieniek, Bret M Evers, Camilla Ferrari, Sara Rollinson, Anna Richardson, Elio Scarpini, Giorgio G Fumagalli, Alessandro Padovani, John Hardy, Parastoo Momeni, Raffaele Ferrari, Francesca Frangipane, Raffaele Maletta, Maria Anfossi, Maura Gallo, Leonard Petrucelli, EunRan Suh, Oscar L Lopez, Tsz H Wong, Jeroen G J van Rooij, Harro Seelaar, Simon Mead, Richard J Caselli, Eric M Reiman, Marwan Noel Sabbagh, Mads Kjolby, Anders Nykjaer, Anna M Karydas, Adam L Boxer, Lea T Grinberg, Jordan Grafman, Salvatore Spina, Adrian Oblak, M-Marsel Mesulam, Sandra Weintraub, Changiz Geula, John R Hodges, Olivier Piguet, William S Brooks, David J Irwin, John Q Trojanowski, Edward B Lee, Keith A Josephs, Joseph E Parisi, Nilüfer Ertekin-Taner, David S Knopman, Benedetta Nacmias, Irene Piaceri, Silvia Bagnoli, Sandro Sorbi, Marla Gearing, Jonathan Glass, Thomas G Beach, Sandra E Black, Mario Masellis, Ekaterina Rogaeva, Jean-Paul Vonsattel, Lawrence S Honig, Julia Kofler, Amalia C Bruni, Julie Snowden, David Mann, Stuart Pickering-Brown, Janine Diehl-Schmid, Juliane Winkelmann, Daniela Galimberti, Caroline Graff, Linn Öijerstedt, Claire Troakes, Safa Al-Sarraj, Carlos Cruchaga, Nigel J Cairns, Jonathan D Rohrer, Glenda M Halliday, John B Kwok, John C van Swieten, Charles L White, Bernardino Ghetti, Jill R Murell, Ian R A Mackenzie, Ging-Yuek R Hsiung, Barbara Borroni, Giacomina Rossi, Fabrizio Tagliavini, Zbigniew K Wszolek, Ronald C Petersen, Eileen H Bigio, Murray Grossman, Vivianna M Van Deerlin, William W Seeley, Bruce L Miller, Neill R Graff-Radford, Bradley F Boeve, Dennis W Dickson, Joanna M Biernacka, Rosa Rademakers
BACKGROUND: Loss-of-function mutations in GRN cause frontotemporal lobar degeneration (FTLD). Patients with GRN mutations present with a uniform subtype of TAR DNA-binding protein 43 (TDP-43) pathology at autopsy (FTLD-TDP type A); however, age at onset and clinical presentation are variable, even within families. We aimed to identify potential genetic modifiers of disease onset and disease risk in GRN mutation carriers. METHODS: The study was done in three stages: a discovery stage, a replication stage, and a meta-analysis of the discovery and replication data...
April 30, 2018: Lancet Neurology
https://www.readbyqxmd.com/read/29720216/decreased-level-of-irisin-a-skeletal-muscle-cell-derived-myokine-is-associated-with-post-stroke-depression-in-the-ischemic-stroke-population
#15
Wen-Jun Tu, Han-Cheng Qiu, Qiang Liu, Xuemei Li, Ji-Zong Zhao, Xianwei Zeng
BACKGROUND: Depression is a frequent mood disorder in stroke patient. Our aim was to determine irisin levels in serum and investigate their associations with post-stroke depression (PSD) in a 6-month follow-up study in Chinese patients with first-ever acute ischemic stroke (AIS). METHODS: The subjects were first-ever AIS patients who were hospitalized at three stroke centers during the period from January 2015 to December 2016. Neurological and neuropsychological evaluations were conducted at the 6-month follow-up...
May 2, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29717736/maximum-in-density-heterogeneities-of-active-swimmers
#16
Fabian Jan Schwarzendahl, Marco G Mazza
Suspensions of unicellular microswimmers such as flagellated bacteria or motile algae can exhibit spontaneous density heterogeneities at large enough concentrations. We introduce a novel model for biological microswimmers that creates the flow field of the corresponding microswimmers, and takes into account the shape anisotropy of the swimmer's body and stroke-averaged flagella. By employing multiparticle collision dynamics, we directly couple the swimmer's dynamics to the fluid's. We characterize the nonequilibrium phase diagram, as the filling fraction and Péclet number are varied, and find density heterogeneities in the distribution of both pullers and pushers, due to hydrodynamic instabilities...
May 2, 2018: Soft Matter
https://www.readbyqxmd.com/read/29712883/small-vessels-dementia-and-chronic-diseases-molecular-mechanisms-and-pathophysiology
#17
REVIEW
Karen Horsburgh, Joanna M Wardlaw, Tom van Agtmael, Stuart M Allan, Mike L J Ashford, Philip M Bath, Rosalind Brown, Jason Berwick, M Zameel Cader, Roxana O Carare, John B Davis, Jessica Duncombe, Tracy D Farr, Jill H Fowler, Jozien Goense, Alessandra Granata, Catherine N Hall, Atticus H Hainsworth, Adam Harvey, Cheryl A Hawkes, Anne Joutel, Rajesh N Kalaria, Patrick G Kehoe, Catherine B Lawrence, Andy Lockhart, Seth Love, Malcolm R Macleod, I Mhairi Macrae, Hugh S Markus, Chris McCabe, Barry W McColl, Paul J Meakin, Alyson Miller, Maiken Nedergaard, Michael O'Sullivan, Terry J Quinn, Rikesh Rajani, Lisa M Saksida, Colin Smith, Kenneth J Smith, Rhian M Touyz, Rebecca C Trueman, Tao Wang, Anna Williams, Steven C R Williams, Lorraine M Work
Cerebral small vessel disease (SVD) is a major contributor to stroke, cognitive impairment and dementia with limited therapeutic interventions. There is a critical need to provide mechanistic insight and improve translation between pre-clinical research and the clinic. A 2-day workshop was held which brought together experts from several disciplines in cerebrovascular disease, dementia and cardiovascular biology, to highlight current advances in these fields, explore synergies and scope for development. These proceedings provide a summary of key talks at the workshop with a particular focus on animal models of cerebral vascular disease and dementia, mechanisms and approaches to improve translation...
April 30, 2018: Clinical Science (1979-)
https://www.readbyqxmd.com/read/29703819/new-insights-from-studies-of-clonal-hematopoiesis
#18
Christopher J Gibson, David P Steensma
Clonal hematopoiesis (CH) describes an asymptomatic expansion of blood cells descended from a single hematopoietic stem cell. Recent studies have shown that CH increases in frequency with aging, and is often driven by somatic mutations in genes that are recurrently mutated in hematologic malignancies. When CH is associated with a mutation in a leukemia-associated gene at a variant allele frequency of 0.02 or greater, it is termed "clonal hematopoiesis of indeterminate potential" (CHIP).  CHIP has a 0...
April 27, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29701837/identification-of-novel-circulatory-microrna-signatures-linked-to-patients-with-ischemic-stroke
#19
Murali Vijayan, Subodh Kumar, Xiangling Yin, Dila Zafer, Vishal Chanana, Pelin Cengiz, P Hemachandra Reddy
MicroRNAs (miRNAs) are involved in growth, development, and occurrence and progression of many diseases. MiRNA mediated post-transcriptional regulation is poorly understood in vascular biology and pathology. The purpose of our study is to determine circulatory miRNAs as early detectable peripheral biomarkers in patients with ischemic stroke (IS). MiRNAs expression levels were measured in IS serum samples and healthy controls using Illumina deep sequencing analysis and identified differentially expressed miRNAs...
April 25, 2018: Human Molecular Genetics
https://www.readbyqxmd.com/read/29692195/exosomes-and-stem-cells-in-degenerative-disease-diagnosis-and-therapy
#20
Yu-Hsun Chang, Kung-Chi Wu, Horng-Jyh Harn, Shinn-Zong Lin, Dah-Ching Ding
Stroke can cause death and disability, resulting in a huge burden on society. Parkinson's disease (PD) is a chronic neurodegenerative disorder characterized by motor dysfunction. Osteoarthritis (OA) is a progressive degenerative joint disease characterized by cartilage destruction and osteophyte formation in the joints. Stem cell therapy may provide a biological treatment alternative to traditional pharmacological therapy. Mesenchymal stem cells (MSCs) are preferred because of their differentiation ability and possible derivation from many adult tissues...
January 1, 2018: Cell Transplantation
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