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Biology of stroke

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https://www.readbyqxmd.com/read/29350995/a-review-of-analytical-methods-for-the-determination-of-clopidogrel-in-pharmaceuticals-and-biological-matrices
#1
Kavitha J, K S Kokilambigai, R Seetharaman, Harini R R, A A Kaaviya, Sowndaravel P, Lakshmi K S
P2Y12 belongs to a group of G protein - coupled (GPCR) purinergic receptors and is a receptor for adenosine diphosphate (ADP). The P2Y12 receptor is involved in platelet aggregation and acts as a biological target for treating thromboembolisms and other clotting disorders. The use of Clopidogrel (CLO) has improved the morbidity and mortality endpoints including cardiovascular death, recurrent myocardial infarction (MI) and stroke at 30 days after percutaneous coronary intervention (PCI). CLO is one such drug that specifically and irreversibly inhibits the P2Y12 subtype of ADP receptor...
January 19, 2018: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/29346320/c-phycocyanin-and-phycocyanobilin-as-remyelination-therapies-for-enhancing-recovery-in-multiple-sclerosis-and-ischemic-stroke-a-preclinical-perspective
#2
REVIEW
Giselle Pentón-Rol, Javier Marín-Prida, Viviana Falcón-Cama
Myelin loss has a crucial impact on behavior disabilities associated to Multiple Sclerosis (MS) and Ischemic Stroke (IS). Although several MS therapies are approved, none of them promote remyelination in patients, limiting their ability for chronic recovery. With no available therapeutic options, enhanced demyelination in stroke survivors is correlated with a poorer behavioral recovery. Here, we show the experimental findings of our group and others supporting the remyelinating effects of C-Phycocyanin (C-PC), the main biliprotein of Spirulina platensis and its linked tetrapyrrole Phycocyanobilin (PCB), in models of these illnesses...
January 18, 2018: Behavioral Sciences
https://www.readbyqxmd.com/read/29345255/pure-mechanistic-analysis-of-additive-neuroprotective-effects-between-baicalin-and-jasminoidin-in-ischemic-stroke-mice
#3
Peng-Qian Wang, Qiong Liu, Wen-Juan Xu, Ya-Nan Yu, Ying-Ying Zhang, Bing Li, Jun Liu, Zhong Wang
Both baicalin (BA) and jasminoidin (JA) are active ingredients in Chinese herb medicine Scutellaria baicalensis and Fructus gardeniae, respectively. They have been shown to exert additive neuroprotective action in ischemic stroke models. In this study we used transcriptome analysis to explore the pure therapeutic mechanisms of BA, JA and their combination (BJ) contributing to phenotype variation and reversal of pathological processes. Mice with middle cerebral artery obstruction were treated with BA, JA, their combination (BJ), or concha margaritifera (CM)...
January 18, 2018: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/29341020/mri-in-the-study-of-animal-models-of-stroke
#4
Pedro Ramos-Cabrer, Daniel Padro
Stroke consists of the loss of cerebral functions resulting from the interruption of blood supply to a region of the brain, and represents the second cause of death and the leading cause of major disability in adults in Europe. Stroke is a very active field of research at preclinical and clinical levels, and Magnetic Resonance Imaging (MRI) is one of the most powerful tools that scientist and clinicians have for the study of the onset, evolution and consequences of this devastating disease, as well as for the monitoring of the success of available treatments, or for the development of novel therapeutic strategies...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29341016/oxygenation-imaging-by-nuclear-magnetic-resonance-methods
#5
Heling Zhou, Nuria Arias-Ramos, Pilar López-Larrubia, Ralph P Mason, Sebastián Cerdán, Jesús Pacheco-Torres
Oxygen monitoring is a topic of exhaustive research due to its central role in many biological processes, from energy metabolism to gene regulation. The ability to monitor in vivo the physiological distribution and the dynamics of oxygen from subcellular to macroscopic levels is a prerequisite to better understand the mechanisms associated with both normal and disease states (cancer, neurodegeneration, stroke, etc.). This chapter focuses on magnetic resonance imaging (MRI) based techniques to assess oxygenation in vivo...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29336875/systems-pharmacology-dissection-of-the-anti-stroke-mechanism-for-the-chinese-traditional-medicine-xing-nao-jing
#6
Yuhua Chen, Yue Sun, Wende Li, Hong Wei, Tianlin Long, Hua Li, Quanhua Xu, Wei Liu
Xing-Nao-Jing (XNJ) is a well-known injection that has been extensively applied in clinical treatment of stroke in China. However, the underlying mechanism of clinical administration of XNJ in stroke remains unclear. In this study, a systems pharmacology strategy based on pharmacokinetic and pharmacodynamics data was applied to analyze the pharmacological effect of XNJ on stroke. Sixteen active compounds were filtered from XNJ through Drug-likeness (DL) and Brain-blood-barrier (BBB) evaluations. Ninety-four potential targets of these active components were identified by SysDT and SEA...
December 20, 2017: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/29334831/does-stroke-rehabilitation-really-matter-part-b-an-algorithm-for-prescribing-an-effective-intensity-of-rehabilitation
#7
Matthew Strider Jeffers, Sudhir Karthikeyan, Mariana Gomez-Smith, Sarah Gasinzigwa, Jannis Achenbach, Astrid Feiten, Dale Corbett
BACKGROUND: The proportional recovery rule suggests that current rehabilitation practices may have limited ability to influence stroke recovery. However, the appropriate intensity of rehabilitation needed to achieve recovery remains unknown. Similarities between rodent and human recovery biomarkers may allow determination of rehabilitation thresholds necessary to activate endogenous biological recovery processes. OBJECTIVE: We determined the relative influence that clinically relevant biomarkers of stroke recovery exert on functional outcome...
January 1, 2018: Neurorehabilitation and Neural Repair
https://www.readbyqxmd.com/read/29334526/airborne-particulate-matter-human-exposure-health-effects
#8
Jonathan E Thompson
OBJECTIVE: Exposure to airborne particulate matter (PM) is estimated to cause millions of premature deaths annually. This work conveys known routes of exposure to PM and resultant health effects. METHODS: Review of available literature. RESULTS: Estimates for daily PM exposure are provided. Known mechanisms by which insoluble particles are transported and removed from the body are discussed. Biological effects of PM, including immune response, cytotoxicity, and mutagenicity are reported...
January 12, 2018: Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/29319405/does-stroke-rehabilitation-really-matter-part-a-proportional-stroke-recovery-in-the-rat
#9
Matthew Strider Jeffers, Sudhir Karthikeyan, Dale Corbett
BACKGROUND: In human upper-limb stroke, initial level of functional impairment or corticospinal tract injury can accurately predict the degree of poststroke recovery, independent of rehabilitation practices. This proportional recovery rule implies that current rehabilitation practices may play little or no role in brain repair, with recovery largely a result of spontaneous biological recovery processes. OBJECTIVE: The present study sought to determine if similar biomarkers predict recovery of poststroke function in rats, indicating that an endogenous biological recovery process might be preserved across mammalian species...
January 1, 2018: Neurorehabilitation and Neural Repair
https://www.readbyqxmd.com/read/29318513/targeted-elimination-of-mutant-mitochondrial-dna-in-melas-ipscs-by-mitotalens
#10
Yi Yang, Han Wu, Xiangjin Kang, Yanhui Liang, Ting Lan, Tianjie Li, Tao Tan, Jiangyun Peng, Quanjun Zhang, Geng An, Yali Liu, Qian Yu, Zhenglai Ma, Ying Lian, Boon Seng Soh, Qingfeng Chen, Ping Liu, Yaoyong Chen, Xiaofang Sun, Rong Li, Xiumei Zhen, Ping Liu, Yang Yu, Xiaoping Li, Yong Fan
Mitochondrial diseases are maternally inherited heterogeneous disorders that are primarily caused by mitochondrial DNA (mtDNA) mutations. Depending on the ratio of mutant to wild-type mtDNA, known as heteroplasmy, mitochondrial defects can result in a wide spectrum of clinical manifestations. Mitochondria-targeted endonucleases provide an alternative avenue for treating mitochondrial disorders via targeted destruction of the mutant mtDNA and induction of heteroplasmic shifting. Here, we generated mitochondrial disease patient-specific induced pluripotent stem cells (MiPSCs) that harbored a high proportion of m...
January 9, 2018: Protein & Cell
https://www.readbyqxmd.com/read/29317030/combination-of-chemical-fingerprinting-with-bioassay-a-preferable-approach-for-quality-control-of-safflower-injection
#11
Wu W Feng, Yi Zhang, Jin F Tang, Cong E Zhang, Qin Dong, Rui Y Li, Xiao H Xiao, Cheng Peng, Xiao P Dong, Dan Yan
Safflower Injection is one kind of injections derived from traditional Chinese medicine. It is widely applied to treat cerebrovascular diseases such as acute cerebral infarction, stroke, coronary heart disease, and angiitis. However, most adverse reactions of Safflower Injection in clinic are caused by its quality problems. In this study, 10 batches of normal and 42 batches of abnormal Safflower Injections were obtained from the clinical practice. Their quality fluctuations were detected by chemical fingerprinting (CF, ultra-performance liquid chromatography tandem mass spectrometry) and bioassays including cell-based biological profile (CBP) assay and enzymatic assay...
March 20, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29312645/serum-galectin-3-level-not-galectin-1-is-associated-with-the-clinical-feature-and-outcome-in-patients-with-acute-ischemic-stroke
#12
Han Dong, Zhi-Hao Wang, Na Zhang, Si-Da Liu, Jian-Jun Zhao, Song-Yan Liu
Aim: To study the diagnostic and prognostic role of serum galectin-1 (Gal-1) and -3 (Gal-3) in acute ischemic stroke (AIS) patients. Methods: We enrolled 233 patients with first-ever acute ischemic stroke and 252 healthy controls in this study. The AIS severity was evaluated by National Institutes of Health Stroke Scale (NIHSS) scores. The serum Gal-1 and -3 levels were determined. All patients were followed for 1 years and the functional outcome were evaluated by modified Rankin Scale (mRS) scores...
December 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/29303618/cell-free-dna-as-a-biomarker-in-stroke-current-status-problems-and-perspectives
#13
Kristina V Glebova, Natalya N Veiko, Aleksey A Nikonov, Lev N Porokhovnik, Svetlana V Kostuyk
There is currently no proposed stroke biomarker with consistent application in clinical practice. A number of studies have examined cell-free DNA (cfDNA), which circulates in biological fluids during stroke, as a potential biomarker of this disease. The data available suggest that dynamically-determined levels of blood cfDNA may provide new prognostic information for assessment of stroke severity and outcome. However, such an approach has its own difficulties and limitations. This review covers the potential role of cfDNA as a biomarker in stroke, and includes evidence from both animal models and clinical studies, protocols used to analyze cfDNA, and hypotheses on the origin of cfDNA...
January 5, 2018: Critical Reviews in Clinical Laboratory Sciences
https://www.readbyqxmd.com/read/29301944/y-chromosome-lineage-determines-cardiovascular-organ-t-cell-infiltration-in-the-stroke-prone-spontaneously-hypertensive-rat
#14
Shanzana I Khan, Karen L Andrews, Kristy L Jackson, Basimah Memon, Ann-Maree Jefferis, Man K S Lee, Henry Diep, Zihui Wei, Grant R Drummond, Geoffrey A Head, Garry L Jennings, Andrew J Murphy, Antony Vinh, Amanda K Sampson, Jaye P F Chin-Dusting
The essential role of the Y chromosome in male sex determination has largely overshadowed the possibility that it may exert other biologic roles. Here, we show that Y-chromosome lineage is a strong determinant of perivascular and renal T-cell infiltration in the stroke-prone spontaneously hypertensive rat, which, in turn, may influence vascular function and blood pressure (BP). We also show, for the first time to our knowledge, that augmented perivascular T-cell levels can directly instigate vascular dysfunction, and that the production of reactive oxygen species that stimulate cyclo-oxygenase underlies this...
January 4, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29295967/from-de-novo-peptides-to-native-proteins-advancements-in-biomaterial-scaffolds-for-acute-ischemic-stroke-repair
#15
James Devon Tang, Kyle J Lampe
An active area of research in the field of regenerative medicine involves the development of bioactive matrices that can promote cellular interactions and elicit desirable regenerative behavior in vivo. This is particularly important in the context of ischemic stroke where a focal lesion forms preventing the regrowth of brain tissue. Protein-based molecules have been used as building blocks to create supramolecular structures that emulate the properties of the native healthy extracellular matrix (ECM) within the central nervous system (CNS)...
January 3, 2018: Biomedical Materials
https://www.readbyqxmd.com/read/29290336/genome-wide-study-of-atrial-fibrillation-identifies-seven-risk-loci-and-highlights-biological-pathways-and-regulatory-elements-involved-in-cardiac-development
#16
Jonas B Nielsen, Lars G Fritsche, Wei Zhou, Tanya M Teslovich, Oddgeir L Holmen, Stefan Gustafsson, Maiken E Gabrielsen, Ellen M Schmidt, Robin Beaumont, Brooke N Wolford, Maoxuan Lin, Chad M Brummett, Michael H Preuss, Lena Refsgaard, Erwin P Bottinger, Sarah E Graham, Ida Surakka, Yunhan Chu, Anne Heidi Skogholt, Håvard Dalen, Alan P Boyle, Hakan Oral, Todd J Herron, Jacob Kitzman, José Jalife, Jesper H Svendsen, Morten S Olesen, Inger Njølstad, Maja-Lisa Løchen, Aris Baras, Omri Gottesman, Anthony Marcketta, Colm O'Dushlaine, Marylyn D Ritchie, Tom Wilsgaard, Ruth J F Loos, Timothy M Frayling, Michael Boehnke, Erik Ingelsson, David J Carey, Frederick E Dewey, Hyun M Kang, Gonçalo R Abecasis, Kristian Hveem, Cristen J Willer
Atrial fibrillation (AF) is a common cardiac arrhythmia and a major risk factor for stroke, heart failure, and premature death. The pathogenesis of AF remains poorly understood, which contributes to the current lack of highly effective treatments. To understand the genetic variation and biology underlying AF, we undertook a genome-wide association study (GWAS) of 6,337 AF individuals and 61,607 AF-free individuals from Norway, including replication in an additional 30,679 AF individuals and 278,895 AF-free individuals...
December 27, 2017: American Journal of Human Genetics
https://www.readbyqxmd.com/read/29280386/the-association-between-biopsychosocial-factors-and-disability-in-a-national-health-survey-in-south-africa
#17
P Naidoo, R Sewpaul, A Nyembezi, P Reddy, K Louw, R Desai, D J Stein
The association between psychosocial factors and disability is less clear. This study investigated the biological and psychosocial (employment and psychological distress) factors associated with level of disability in an adult sample in South Africa. Data were analysed from a cross-sectional survey among adults aged 18-64 (n = 4974). Multiple linear regression was used to investigate the associations of the selected variables with disability. The mean percentage score on the WHODAS scale of disability was 5...
December 27, 2017: Psychology, Health & Medicine
https://www.readbyqxmd.com/read/29278852/adipokines-in-neurovascular-diseases
#18
REVIEW
Radka Opatrilova, Martin Caprnda, Peter Kubatka, Vanda Valentova, Sona Uramova, Vladimir Nosal, Ludovit Gaspar, Lukas Zachar, Ioana Mozos, Daniel Petrovic, Jozef Dragasek, Slavomira Filipova, Dietrich Büsselberg, Anthony Zulli, Luis Rodrigo, Peter Kruzliak, Vladimir Krasnik
Adipose tissue is now described as an endocrine organ secreting a number of adipokines contributing to the development of inflammation and metabolic imbalance, but also endothelial dysfunction, vascular remodeling, atherosclerosis, and ischemic stroke. Leptin, adiponectin, and resistin are the most studied adipokines which play important roles in the regulation of cardiovascular homeostasis. Leptin and adiponectin mediate both proatherogenic and antiatherogenic responses. Leptin and adiponectin have been linked to the development of coronary heart disease and may be involved in the underlying biological mechanism of ischemic stroke...
December 23, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29278365/sexually-dimorphic-outcomes-after-neonatal-stroke-and-hypoxia-ischemia
#19
REVIEW
Christiane Charriaut-Marlangue, Valérie C Besson, Olivier Baud
Cohort studies have demonstrated a higher vulnerability in males towards ischemic and/or hypoxic-ischemic injury in infants born near- or full-term. Male sex was also associated with limited brain repair following neonatal stroke and hypoxia-ischemia, leading to increased incidence of long-term cognitive deficits compared to females with similar brain injury. As a result, the design of pre-clinical experiments considering sex as an important variable was supported and investigated because neuroprotective strategies to reduce brain injury demonstrated sexual dimorphism...
December 26, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29276113/ayurveda-and-the-science-of-aging
#20
REVIEW
Rammohan V Rao
Since time immemorial, humanity has been concerned with developing and preserving youthful vigor, and extending longevity by stopping or delaying the aging process. By 2030, one in five of the world population will be over 65 years old. Longevity and old age are accompanied with a variety of health challenges and population studies indicate that the elderly will use between three to five times more healthcare services compared to the younger population. Modern medicine has made a great deal of progress in understanding the aging process and in controlling age-associated health issues including heart attacks, strokes, diabetes, cancer, senility, and arthritis...
December 21, 2017: Journal of Ayurveda and Integrative Medicine
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