keyword
MENU ▼
Read by QxMD icon Read
search

Stroke immune system

keyword
https://www.readbyqxmd.com/read/28609584/endothelial-nitric-oxide-synthase-inhibition-triggers-inflammatory-responses-in-the-brain-of-male-rats-exposed-to-ischemia-reperfusion-injury
#1
Rosaria Greco, Chiara Demartini, Anna Maria Zanaboni, Fabio Blandini, Diana Amantea, Cristina Tassorelli
Nitric oxide (NO) derived from endothelial NO synthase (eNOS) plays a role in preserving and maintaining the brain's microcirculation, inhibiting platelet aggregation, leukocyte adhesion, and migration. Inhibition of eNOS activity results in exacerbation of neuronal injury after ischemia by triggering diverse cellular mechanisms, including inflammatory responses. To examine the relative contribution of eNOS in stroke-induced neuroinflammation, we analyzed the effects of systemic treatment with l-N-(1-iminoethyl)ornithine (L-NIO), a relatively selective eNOS inhibitor, on the expression of MiR-155-5p, a key mediator of innate immunity regulation and endothelial dysfunction, in the cortex of male rats subjected to transient middle cerebral artery occlusion (tMCAo) followed by 24 hr of reperfusion...
June 13, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/28597983/celecoxib-for-rheumatoid-arthritis
#2
REVIEW
Mahir Fidahic, Antonia Jelicic Kadic, Mislav Radic, Livia Puljak
BACKGROUND: Rheumatoid arthritis is a systemic auto-immune disorder that causes widespread and persistent inflammation of the synovial lining of joints and tendon sheaths. Presently, there is no cure for rheumatoid arthritis and treatment focuses on managing symptoms such as pain, stiffness and mobility, with the aim of achieving stable remission and improving mobility. Celecoxib is a selective non-steroidal anti-inflammatory drug (NSAID) used for treatment of people with rheumatoid arthritis...
June 9, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28585898/circulating-extracellular-dna-levels-are-acutely-elevated-in-ischaemic-stroke-and-associated-with-innate-immune-system-activation
#3
Grant C O'Connell, Ashley B Petrone, Connie S Tennant, Noelle Lucke-Wold, Yasser Kabbani, Abdul R Tarabishy, Paul D Chantler, Taura L Barr
OBJECTIVE: The objective of this work was to assess the ability of peripheral blood cell-free DNA (cfDNA) levels to identify ischaemic stroke early in the acute phase of care, as well as to examine the relationship between peripheral blood cfDNA levels and stroke-induced innate immune system activation. METHODS: Upon emergency department admission, peripheral blood samples were obtained from 43 patients experiencing acute ischaemic stroke and 20 patients identified as stroke mimics...
June 6, 2017: Brain Injury: [BI]
https://www.readbyqxmd.com/read/28541444/blood-brain-barrier-pericyte-importance-in-malignant-gliomas-what-we-can-learn-from-stroke-and-alzheimer-s-disease
#4
Sadhana Jackson, Ayman ElAli, Daniela Virgintino, Mark R Gilbert
The pericyte, a constitutive component of the central nervous system, is a poorly understood cell type that envelops the endothelial cell with the intended purpose of regulating vascular flow and endothelial cell permeability. Previous studies of pericyte function have been limited to a small number of disease processes such as ischemic stroke and Alzheimer's disease. Recently, publications have postulated a link between glioma stem cell differentiation and pericyte function. These studies suggest that there may be an important interaction of pericytes with tumor cells and other components of the tumor microenvironment in malignant primary glial neoplasms, most notably glioblastoma...
May 24, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28540600/microglial-interferon-signaling-and-white-matter
#5
Ashley McDonough, Richard V Lee, Jonathan R Weinstein
Microglia, the resident immune cells of the CNS, are primary regulators of the neuroimmune response to injury. Type I interferons (IFNs), including the IFNαs and IFNβ, are key cytokines in the innate immune system. Their activity is implicated in the regulation of microglial function both during development and in response to neuroinflammation, ischemia, and neurodegeneration. Data from numerous studies in multiple sclerosis (MS) and stroke suggest that type I IFNs can modulate the microglial phenotype, influence the overall neuroimmune milieu, regulate phagocytosis, and affect blood-brain barrier integrity...
May 25, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28535201/regulatory-t-cells-ameliorate-tissue-plasminogen-activator-induced-brain-haemorrhage-after-stroke
#6
Leilei Mao, Peiying Li, Wen Zhu, Wei Cai, Zongjian Liu, Yanling Wang, Wenli Luo, Ruth A Stetler, Rehana K Leak, Weifeng Yu, Yanqin Gao, Jun Chen, Gang Chen, Xiaoming Hu
Delayed thrombolytic treatment with recombinant tissue plasminogen activator (tPA) may exacerbate blood-brain barrier breakdown after ischaemic stroke and lead to lethal haemorrhagic transformation. The immune system is a dynamic modulator of stroke response, and excessive immune cell accumulation in the cerebral vasculature is associated with compromised integrity of the blood-brain barrier. We previously reported that regulatory T cells, which function to suppress excessive immune responses, ameliorated blood-brain barrier damage after cerebral ischaemia...
May 22, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28517732/t-cells-and-macrophages-peak-weeks-after-experimental-stroke-spatial-and-temporal-characteristics
#7
Nina Vindegaard, Clara Muñoz-Briones, Henrik H El Ali, Lotte Kellemann Kristensen, Rune Skovgaard Rasmussen, Flemming Fryd Johansen, Henrik Hasseldam
The activities of the central and peripheral immune systems impact neurological outcome after ischemic stroke. However, studies investigating the temporal profile of leukocyte infiltration, especially T-cell recruitment, are sparse. Our aim was to investigate leukocyte infiltration at different time points after experimental stroke in mice. Permanent middle cerebral artery occlusion was performed on 11 weeks old C57BL/6J mice, allowed to survive for 1, 3, 8, 14 or 28 days. In addition to infarct size measurements, detailed immunohistochemical analyses of T-cell and macrophage influx were performed...
May 18, 2017: Neuropathology: Official Journal of the Japanese Society of Neuropathology
https://www.readbyqxmd.com/read/28488363/the-role-of-regulatory-t-cells-in-nervous-system-pathologies
#8
REVIEW
Samuel S Duffy, Brooke A Keating, Chamini J Perera, Gila Moalem-Taylor
Regulatory T (Treg) cells are a special subpopulation of immunosuppressive T cells that are essential for sustaining immune homeostasis. They maintain self-tolerance, inhibit autoimmunity, and act as critical negative regulators of inflammation in various pathological states including autoimmunity, injury, and degeneration of the nervous system. Treg cells are known to convey both beneficial and detrimental influences in certain disease contexts, and accumulating research suggests that their action may be altered in a range of peripheral and central nervous system pathologies...
May 10, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/28485026/giant-cell-arteritis-beyond-temporal-artery-biopsy-and-steroids
#9
REVIEW
Jem V Ninan, Susan Lester, Catherine L Hill
Giant cell arteritis is the commonest primary vasculitis of the elderly. The acute complications of untreated Giant cell arteritis such as vision loss or occasionally stroke can be devastating. The diagnosis is however not altogether straightforward due to variable sensitivities of the temporal artery biopsy as a reference diagnostic test. In this review, we discuss the increasing role of imaging in the diagnosis of Giant cell arteritis. Glucocorticoid treatment is the backbone of therapy but it is associated with significant adverse effects...
May 9, 2017: Internal Medicine Journal
https://www.readbyqxmd.com/read/28483458/killer-cells-in-atherosclerosis
#10
Tin Kyaw, Peter Tipping, Ban-Hock Toh, Alex Bobik
Cytotoxic lymphocytes (killer cells) play a critical role in host defence mechanisms, protecting against infections and in tumour surveillance. They can also exert detrimental effects in chronic inflammatory disorders and in autoimmune diseases. Tissue cell death and necrosis are prominent features of advanced atherosclerotic lesions including vulnerable/unstable lesions which are largely responsible for most heart attacks and strokes. Evidence for accumulation of killer cells in both human and mouse lesions together with their cytotoxic potential strongly suggest that these cells contribute to cell death and necrosis in lesions leading to vulnerable plaque development and potentially plaque rupture...
May 5, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28481238/the-adenosinergic-system-as-a-therapeutic-target-in-the-vasculature-new-ligands-and-challenges
#11
REVIEW
Joana Beatriz Sousa, Carmen Diniz
Adenosine is an adenine base purine with actions as a modulator of neurotransmission, smooth muscle contraction, and immune response in several systems of the human body, including the cardiovascular system. In the vasculature, four P1-receptors or adenosine receptors-A₁, A2A, A2B and A₃-have been identified. Adenosine receptors are membrane G-protein receptors that trigger their actions through several signaling pathways and present differential affinity requirements. Adenosine is an endogenous ligand whose extracellular levels can reach concentrations high enough to activate the adenosine receptors...
May 6, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28478842/periodontal-disease-as-a-potential-factor-of-migraine-chronification
#12
Pablo Ameijeira, Yago Leira, Juan Blanco, Rogelio Leira
Migraine is a hereditary constitutional base disorder, which is characterized by recurrent episodes of headache pulsatile characteristics associated with photophobia/phonophobia, nausea and/or vomiting. The main complication in migraine is the chronicity of the process, now recognized as a chronic migraine. Although pathogenic mechanisms that may influence the pathophysiology of migraine and its possible chronicity are not fully understood, previous studies have shown in patients with migraine molecular alterations of systemic inflammation, neurogenic inflammation, endothelial dysfunction, innate immunity, dysfunction of matrix proteases and blood-brain barrier...
May 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28471481/cytotoxic-lymphocytes-and-atherosclerosis-significance-mechanisms-and-therapeutic-challenges
#13
Tin Kyaw, Karlheinz Peter, Li Yi, Peter Tipping, Ban-Hock Toh, Alex Bobik
Cytotoxic lymphocytes encompass natural killer (NK) lymphocytes (cells) and cytotoxic T cells that include CD8+ T cells, NKT cells, gamma, delta (γδ)-T cells and human CD4 + CD28- T cells. These cells play critical roles in inflammatory diseases and in controlling cancers and infections. Cytotoxic lymphocytes can be activated via a number of mechanisms that may involve dendritic cells, macrophages, cytokines or surface proteins on stressed cells. Upon activation, they secrete proinflammatory cytokines as well as anti-inflammatory cytokines, chemokines and cytotoxins to promote inflammation and development of atherosclerotic lesions including vulnerable lesions, which are strongly implicated in myocardial infarctions and strokes...
May 4, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28392459/stroke-and-other-cerebrovascular-diseases
#14
EDITORIAL
Halina Offner, Masafumi Ihara, Wolf-Rüdiger Schäbitz, Peter T-H Wong
To achieve success in developing more effective treatments for stroke, we need a better understanding in all aspects of stroke including prevention, diagnosis, treatment, and post-stroke recovery and complications. The objective of this special issue is to bring to the readership of Neurochemistry International the latest developments and knowledge in a broad spectrum of areas of stroke research in both review and original research articles. Topics include neuroprotective diets, biomarkers used to aid clinical management, neurodegenerative as well as neuroprotective effects of the immune system, potential therapeutic targets, engineered growth factors that promote endogenous neuroregeneration, mechanisms of cerebral small vessel disease, and post stroke epilepsy...
July 2017: Neurochemistry International
https://www.readbyqxmd.com/read/28389473/st2-il-33-dependent-microglial-response-limits-acute-ischemic-brain-injury
#15
Yuanyuan Yang, Huan Liu, Haiyue Zhang, Qing Ye, Jianyi Wang, Boyu Yang, Leilei Mao, Wen Zhu, Rehana K Leak, Bo Xiao, Binfeng Lu, Jun Chen, Xiaoming Hu
ST2, a member of the interleukin (IL) 1 receptor family, and its ligand IL-33 play critical roles in immune regulation and inflammatory responses. This study explores the roles of endogenous IL-33/ST2 signaling in ischemic brain injury and elucidates the underlying mechanisms of action. The expression of IL-33 rapidly increased in oligodendrocytes and astrocytes after 60 min transient middle cerebral artery occlusion (tMCAO). ST2 receptor deficiency exacerbated brain infarction 3 d after tMCAO as well as distal permanent MCAO...
May 3, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28331857/thrombosis-neuroinflammation-and-poststroke-infection-the-multifaceted-role-of-neutrophils-in-stroke
#16
REVIEW
Johanna Ruhnau, Juliane Schulze, Alexander Dressel, Antje Vogelgesang
Immune cells can significantly predict and affect the clinical outcome of stroke. In particular, the neutrophil-to-lymphocyte ratio was shown to predict hemorrhagic transformation and the clinical outcome of stroke; however, the immunological mechanisms underlying these effects are poorly understood. Neutrophils are the first cells to invade injured tissue following focal brain ischemia. In these conditions, their proinflammatory properties enhance tissue damage and may promote ischemic incidences by inducing thrombus formation...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28320635/safety-and-efficacy-of-multipotent-adult-progenitor-cells-in-acute-ischaemic-stroke-masters-a-randomised-double-blind-placebo-controlled-phase-2-trial
#17
RANDOMIZED CONTROLLED TRIAL
David C Hess, Lawrence R Wechsler, Wayne M Clark, Sean I Savitz, Gary A Ford, David Chiu, Dileep R Yavagal, Ken Uchino, David S Liebeskind, Alexander P Auchus, Souvik Sen, Cathy A Sila, Jeffrey D Vest, Robert W Mays
BACKGROUND: Multipotent adult progenitor cells are a bone marrow-derived, allogeneic, cell therapy product that modulates the immune system, and represents a promising therapy for acute stroke. We aimed to identify the highest, well-tolerated, and safest single dose of multipotent adult progenitor cells, and if they were efficacious as a treatment for stroke recovery. METHODS: We did a phase 2, randomised, double-blind, placebo-controlled, dose-escalation trial of intravenous multipotent adult progenitor cells in 33 centres in the UK and the USA...
May 2017: Lancet Neurology
https://www.readbyqxmd.com/read/28320030/changes-in-regulatory-t-cell-levels-in-acute-cerebral-ischemia
#18
Xuerui Pang, Weidong Qian
Background Acute stroke causes intense and significant changes in the immune system as well as in the number and the ratio of various immune cells. Material and Methods Several large-scale studies have shown that ischemic stroke leaves the human body in a state of immunodepression. The regulatory T (Treg) cells may be strongly associated with a change of immune status. In this trial, we collected venous blood from a cohort of patients who were diagnosed with acute ischemic stroke within the last 24 hours (n = 139)...
July 2017: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/28315744/cardiac-implantable-electronic-device-infections-who-is-at-greatest-risk
#19
Parijat Saurav Joy, Gagan Kumar, Jeanne E Poole, Barry London, Brian Olshansky
BACKGROUND: Cardiac implantable electronic device (CIED) infections are associated with hospitalization, mortality, increased costs, and adverse outcomes. OBJECTIVE: Determine the burden of infections for CIEDs based on device type, associated comorbidities, and clinical characteristics over a 12-year period. METHODS: Utilizing data from the National Inpatient Sample database for cases from 2000 through 2012, we identified procedures for device-related infection (DRI) using International Statistical Classification of Diseases and Related Health Problems, Ninth Revision, Clinical Modification (ICD-9-CM) codes for CIED removal with diagnosis codes for device-related infection or systemic infection...
March 16, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28314594/brain-ischemia-suppresses-immunity-in-the-periphery-and-brain-via-different-neurogenic-innervations
#20
Qiang Liu, Wei-Na Jin, Yaou Liu, Kaibin Shi, Haoran Sun, Fang Zhang, Chao Zhang, Rayna J Gonzales, Kevin N Sheth, Antonio La Cava, Fu-Dong Shi
Brain ischemia inhibits immune function systemically, with resulting infectious complications. Whether in stroke different immune alterations occur in brain and periphery and whether analogous mechanisms operate in these compartments remains unclear. Here we show that in patients with ischemic stroke and in mice subjected to middle cerebral artery occlusion, natural killer (NK) cells display remarkably distinct temporal and transcriptome profiles in the brain as compared to the periphery. The activation of catecholaminergic and hypothalamic-pituitary-adrenal axis leads to splenic atrophy and contraction of NK cell numbers in the periphery through a modulated expression of SOCS3, whereas cholinergic innervation-mediated suppression of NK cell responses in the brain involves RUNX3...
March 21, 2017: Immunity
keyword
keyword
53902
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"