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Stroke inflammation

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https://www.readbyqxmd.com/read/29348254/circulating-platelets-as-mediators-of-immunity-inflammation-and-thrombosis
#1
REVIEW
Milka Koupenova, Lauren Clancy, Heather A Corkrey, Jane E Freedman
Platelets, non-nucleated blood components first described over 130 years ago, are recognized as the primary cell regulating hemostasis and thrombosis. The vascular importance of platelets has been attributed to their essential role in thrombosis, mediating myocardial infarction, stroke, and venous thromboembolism. Increasing knowledge on the platelets' role in the vasculature has led to many advances in understanding not only how platelets interact with the vessel wall but also how they convey changes in the environment to other circulating cells...
January 19, 2018: Circulation Research
https://www.readbyqxmd.com/read/29345350/activation-of-the-sympathetic-nervous-system-modulates-neutrophil-function
#2
Alyce J Nicholls, Shu Wen Wen, Pam Hall, Michael J Hickey, Connie H Y Wong
Emerging evidence has revealed that noradrenaline (NA), the main neurotransmitter of the sympathetic nervous system (SNS), regulates a variety of immune functions via binding to adrenergic receptors present on immune cells. In this study, we examined the role of NA in the regulation of neutrophil functions. Neutrophils were isolated from the bone marrow of naïve mice and treated with NA at various concentrations to assess the effect on various neutrophil functions. Additionally, we performed cremaster intravital microscopy to examine neutrophil-endothelial cell interactions following NA superfusion in vivo...
December 21, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/29337240/prevention-of-the-severity-of-post-ischemic-inflammation-and-brain-damage-by-simultaneous-knockdown-of-toll-like-receptors-2-and-4
#3
Koteswara Rao Nalamolu, Nathan J Smith, Bharath Chelluboina, Jeffrey D Klopfenstein, David M Pinson, David Z Wang, Raghu Vemuganti, Krishna Kumar Veeravalli
Toll-like receptor 2 (TLR2) and TLR4 belong to a family of highly conserved pattern recognition receptors and are well-known upstream sensors of signaling pathways of innate immunity. TLR2 and TLR4 upregulation is thought to be associated with poor outcome in stroke patients. We currently show that transient focal ischemia in adult rats induces TLR2 and TLR4 expression within hours and shRNA-mediated knockdown of TLR2 and TLR4 alone and in combination decreases the infarct size and swelling. We further show that TLR2 and TLR4 knockdown also prevented the induction of their downstream signaling molecules MyD88, IRAK1, and NFκB p65 as well as the pro-inflammatory cytokines IL-1β, IL-6, and TNFα...
January 11, 2018: Neuroscience
https://www.readbyqxmd.com/read/29336246/the-role-of-colchicine-in-the-prevention-of-cerebrovascular-ischemia
#4
Georgios Tsivgoulis, Aristeidis H Katsanos, Georgios Giannopoulos, Vasiliki Panagopoulou, Dalius Jatuzis, Robin Lemnens, Spyridon Deftereos, Peter J Kelly
INTRODUCTION: Despite the proven efficacy of anti-thrombotic, lipid-lowering, anti-hypertensive therapies and lifestyle modification changes for secondary ischemic stroke prevention, the risk of recurrent stroke, coronary events and vascular death remains substantial even for patients treated with high rates of established secondary preventive medications. METHODS: In the present review, we summarize available literature data on the association between systemic inflammation and symptomatic atherosclerosis including recurrent cerebral ischemia...
January 15, 2018: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/29334496/oxygen-in-the-critically-ill-friend-or-foe
#5
Elisa Damiani, Abele Donati, Massimo Girardis
PURPOSE OF REVIEW: To examine the potential harmful effects of hyperoxia and summarize the results of most recent clinical studies evaluating oxygen therapy in critically ill patients. RECENT FINDINGS: Excessive oxygen supplementation may have detrimental pulmonary and systemic effects because of enhanced oxidative stress and inflammation. Hyperoxia-induced lung injury includes altered surfactant protein composition, reduced mucociliary clearance and histological damage, resulting in atelectasis, reduced lung compliance and increased risk of infections...
January 12, 2018: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/29332603/previous-use-of-statins-and-atrial-electrical-remodeling-in-patients-with-cryptogenic-stroke
#6
Maurizio Acampa, Pietro Enea Lazzerini, Francesca Guideri, Rossana Tassi, Andrea Lo Monaco, Giuseppe Martini
BACKGROUND: In the general population the leading cause of cardioembolic stroke is atrial fibrillation (AF). A silent AF is also the possible cause of many cryptogenic strokes. P wave dispersion (PWD), a predictor of AF, has been proposed as a marker of silent AF occurrence in these strokes. PWD correlates with high-sensitive C-reactive protein levels reflecting the role of inflammation in promoting a slowed and inhomogeneous atrial conduction. Statins have a multitude of additional effects beyond lipid lowering, in particular anti-inflammatory effects that may influence atrial conduction...
January 10, 2018: Cardiovascular & Hematological Disorders Drug Targets
https://www.readbyqxmd.com/read/29325222/pneumonia-as-a-cardiovascular-disease
#7
REVIEW
Marcos I Restrepo, Luis F Reyes
Community-acquired pneumonia (CAP) is an important cause of death around the globe. Up to 30% of patients admitted to hospital for CAP develop cardiovascular complications (i.e. new/worsening heart failure, new/worsening arrhythmias, myocardial infarctions and/or strokes), acutely and up to 10 years thereafter. Cardiac complications result from complex interactions between preexisting conditions, relative ischaemia, upregulation of the sympathetic system, systemic inflammation and direct pathogen-mediated damage to the cardiovascular system...
January 11, 2018: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/29325217/neutrophil-infiltration-to-the-brain-is-platelet-dependent-and-is-reversed-by-blockade-of-platelet-gpib%C3%AE
#8
James A Giles, Andrew D Greenhalgh, Adam Denes, Bernhard Nieswandt, Graham Coutts, Barry W McColl, Stuart M Allan
Neutrophils are key components of the innate immune response, providing host defence against infection and being recruited to non-microbial injury sites. Platelets act as a trigger for neutrophil extravasation to inflammatory sites but mechanisms and tissue-specific aspects of these interactions are currently unclear. Here, we use bacterial endotoxin in mice to trigger an innate inflammatory response in different tissues and measure neutrophil invasion with or without platelet reduction. We show that platelets are essential for neutrophil infiltration to the brain, peritoneum and skin, neutrophil numbers returning to basal levels in the peritoneum and skin and being decreased (~60%) in the brain when platelets are reduced...
January 11, 2018: Immunology
https://www.readbyqxmd.com/read/29321396/-molecular-and-cellular-mechanisms-underlying-the-sterile-inflammation-after-ischemic-stroke
#9
Takashi Shichita
Inflammation is an essential step for the pathology of ischemic stroke, and is also an important therapeutic target for developing novel therapeutic methods which have a wide therapeutic time window. Since there is no pathogen in the brain, the inflammation will be triggered by some endogenous molecules which are called as danger associated molecular patterns (DAMPs). So far two important DAMPs, high mobility group box 1 (HMGB1) and peroxiredoxin (PRX), have been recently identified in the ischemic brain. HMGB1 exaggerates the disruption of blood brain barrier; on the other hand, PRX activates mononuclear phagocytes and induces the inflammatory cytokine production through the activation of Toll-like receptor 2 (TLR2) and TLR4...
2018: Nihon Yakurigaku Zasshi. Folia Pharmacologica Japonica
https://www.readbyqxmd.com/read/29318974/-understanding-the-role-of-hypoxia-inducible-factor-during-neurodegeneration-for-new-therapeutics-opportunities
#10
Amalia Merelli, Julio Cesar Garcia Rodriguez, Jaume Folch, Marcelo R Regueiro, Antoni Camins, Lazarowski Alberto
Neurodegeneration (NDG) is linked with the progressive loss of neural function with intellectual and/or motor impairment. Several diseases affecting older individuals, including Alzheimer's disease, Amyotrophic Lateral Sclerosis, Huntington's disease, Parkinson's disease, stroke, Multiple Sclerosis and many others, are the most relevant disorders associated with NDG. Since other pathologies such as refractory epilepsy, brain infections, or hereditary diseases such as "neurodegeneration with brain iron accumulation", also lead to chronic brain inflammation with loss of neural cells, NDG can be said to affect all ages...
January 10, 2018: Current Neuropharmacology
https://www.readbyqxmd.com/read/29316215/oxidized-low-density-lipoprotein-in-inflammation-driven-thrombosis
#11
Georg Obermayer, Taras Afonyushkin, Christoph J Binder
Thrombosis is the defining feature of the most prevalent causes of cardiovascular mortality, such as myocardial infarction, stroke and pulmonary artery embolism. While platelet activation as well as activation of the plasmatic coagulation system are the hallmarks of thrombus formation, inflammatory processes and the cellular responses involved are increasingly recognized as critical modulators of thrombosis. In the context of many chronic inflammatory diseases that are associated with a high thrombotic risk, oxidized lipoproteins represent a prominent sterile trigger of inflammation...
January 6, 2018: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/29315754/tspo-regulation-in-reactive-gliotic-diseases
#12
REVIEW
Adam M McNeela, Charles Bernick, Rochelle M Hines, Dustin J Hines
The brain is the most metabolically active organ in the body. This high metabolic demand is apparent in that 60% of the brain is comprised of mitochondria-enriched cells. A disruption of the brain's ability to meet this immense metabolic demand is central to the pathogenesis of a multitude of neurological disorders, which range from depression to Alzheimer's disease. Central to these pathologies are glial signaling and energy metabolism cascades regulating apoptosis and inflammation. Thus, diseases causing inflammation and disruption of metabolism can be correlated with glial reactivity...
January 6, 2018: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/29310992/interleukin-1-genotypes-modulate-the-long-term-effect-of-lipoprotein-a-on-cardiovascular-events-the-ioannina-study
#13
Katerina K Naka, Aris Bechlioullis, Aikaterini Marini, Dimitrios Sionis, Konstantinos Vakalis, Georgios Triantis, Leon Wilkins, John Rogus, Kenneth S Kornman, Joseph L Witztum, Lynn Doucette-Stamm, Lampros K Michalis, Sotirios Tsimikas
BACKGROUND: Lipoprotein(a) [Lp(a)] is a genetic risk factor for cardiovascular disease (CVD), and proinflammatory interleukin-1 (IL-1) genotypes may influence Lp(a)-mediated CVD events. The genotype IL-1(+) is associated with higher rates of inflammation than IL-1(-) genotype. Targeting IL-1β was recently shown to decrease CVD events independent of low-density lipoprotein-cholesterol levels. OBJECTIVE: The objective of the study is to assess the modulatory effect of IL-1 genotypes on risk mediated by Lp(a) METHODS: We assessed whether IL-1 genotypes modulate the effect of Lp(a) on major adverse cardiovascular events (cardiovascular death, myocardial infarction, and stroke/transient ischemic attack) and angiographically determined coronary artery disease (CAD)...
December 19, 2017: Journal of Clinical Lipidology
https://www.readbyqxmd.com/read/29304004/effects-of-fluoxetine-on-hippocampal-neurogenesis-and-neuroprotection-in-the-model-of-global-cerebral-ischemia-in-rats
#14
Marina Khodanovich, Alena Kisel, Marina Kudabaeva, Galina Chernysheva, Vera Smolyakova, Elena Krutenkova, Irina Wasserlauf, Mark Plotnikov, Vasily Yarnykh
A selective serotonin reuptake inhibitor, fluoxetine, has recently attracted a significant interest as a neuroprotective therapeutic agent. There is substantial evidence of improved neurogenesis under fluoxetine treatment of brain ischemia in animal stroke models. We studied long-term effects of fluoxetine treatment on hippocampal neurogenesis, neuronal loss, inflammation, and functional recovery in a new model of global cerebral ischemia (GCI). Brain ischemia was induced in adult Wistar male rats by transient occlusion of three main vessels originating from the aortic arch and providing brain blood supply...
January 5, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29291393/patchouli-alcohol-protects-against-ischemia-reperfusion-induced-brain-injury-via-inhibiting-neuroinflammation-in-normal-and-obese-mice
#15
Li-Li Wei, Yong Chen, Qiong-Yang Yu, Yuhui Wang, George Liu
Almost all of the candidate drugs for ischemic stroke failed to be translated from bench to beside. One important reason is that animals used in experimental studies cannot mimic ischemic patients due to lack of comorbidities like hypertension, diabetes and obesity. Therefore, it is better to test candidate drugs not only in normal animals but also in animals with comorbidities. Patchouli alcohol (PA), a natural tricyclic sesquiterpene in the traditional Chinese herb Pogostemonisherba, is well recognized for its anti-inflammation function in various inflammatory diseases...
December 29, 2017: Brain Research
https://www.readbyqxmd.com/read/29290940/lysophosphatidylcholine-induces-cytotoxicity-apoptosis-and-il-8-production-of-human-endothelial-cells-related-mechanisms
#16
Mei-Chi Chang, Jang-Jaer Lee, Yi-Jane Chen, Szu-I Lin, Li-Deh Lin, Eric Jein-Wen Liou, Wei-Ling Huang, Chiu-Po Chan, Chi-Chia Huang, Jiiang-Huei Jeng
Increased levels of oxidized low-density lipoprotein oxLDL) are shown to elevate the risk of cardiovascular diseases such as atherosclerosis, thrombosis, stroke, and myocardial infarction. This is possibly due to the toxic effects of oxLDLs on vascular cells. Various oxLDLs including lysophosphatidylcholine (LPC) and 7-ketocholesterol injure vascular endothelial cells and stimulate inflammatory reaction. However the toxicity of LPC on endothelial cells is not clear. In this study, human endothelial cells were exposed to LPC...
December 5, 2017: Oncotarget
https://www.readbyqxmd.com/read/29288632/association-of-vascular-indices-with-novel-circulating-biomarkers-as-prognostic-factors-for-cardiovascular-complications-in-patients-with-type-2-diabetes-mellitus
#17
Katerina K Naka, Katerina Papathanassiou, Aris Bechlioulis, Konstantinos Pappas, Stelios Tigas, Dimitrios Makriyiannis, Sophia Antoniou, Nikolaos Kazakos, Alexandra Margeli, Ioannis Papassotiriou, Agathocles Tsatsoulis, Lampros K Michalis
BACKGROUND: The pathophysiology of atherosclerosis in type 2 diabetes mellitus (T2DM) is multifactorial. The association of vascular indices with circulating biomarkers of inflammation and insulin resistance and their role in the long-term cardiovascular prognosis in T2DM patients were currently investigated. PATIENTS AND METHODS: Patients with T2DM and poor glycemic control without known cardiovascular diseases (n=119) at baseline were enrolled and followed for about 9years...
December 27, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/29286319/cellular-and-molecular-mechanisms-underlying-non-pharmaceutical-ischemic-stroke-therapy-in-aged-subjects
#18
REVIEW
Raluca Elena Sandu, Danut Dumbrava, Roxana Surugiu, Daniela-Gabriela Glavan, Andrei Gresita, Eugen Bogdan Petcu
The incidence of ischemic stroke in humans increases exponentially above 70 years both in men and women. Comorbidities like diabetes, arterial hypertension or co-morbidity factors such as hypercholesterolemia, obesity and body fat distribution as well as fat-rich diet and physical inactivity are common in elderly persons and are associated with higher risk of stroke, increased mortality and disability. Obesity could represent a state of chronic inflammation that can be prevented to some extent by non-pharmaceutical interventions such as calorie restriction and hypothermia...
December 29, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29283333/neurosteroids-and-ischemic-stroke-progesterone-a-promising-agent-in-reducing-the-brain-injury-in-ischemic-stroke
#19
REVIEW
Syed Suhail Andrabi, Suhel Parvez, Heena Tabassum
Progesterone (P4), a well-known neurosteroid, is produced by ovaries and placenta in females and by adrenal glands in both sexes. Progesterone is also synthesized by central nervous system (CNS) tissues to perform various vital neurological functions in the brain. Apart from performing crucial reproductive functions, it also plays a pivotal role in neurogenesis, regeneration, cognition, mood, inflammation, and myelination in the CNS. A substantial body of experimental evidence from animal models documents the neuroprotective role of P4 in various CNS injury models, including ischemic stroke...
2017: Journal of Environmental Pathology, Toxicology and Oncology
https://www.readbyqxmd.com/read/29278852/adipokines-in-neurovascular-diseases
#20
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
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