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Neutrophil stroke

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https://www.readbyqxmd.com/read/28181171/neutrophil-to-lymphocyte-ratio-predicts-3-month-outcome-of-acute-ischemic-stroke
#1
Sen Qun, Yan Tang, Jing Sun, Zhaoxia Liu, Juncang Wu, Ji Zhang, Jidong Guo, Zhiqiang Xu, Dan Zhang, Zhengxu Chen, Fuyong Hu, Xingshun Xu, Wei Ge
Increasing evidences have demonstrated that inflammation is involved in the mechanisms of acute ischemic stroke (AIS). As an important and easy-to-measure inflammatory marker, neutrophil-to-lymphocyte ratio (NLR) shows a high association with mortality in patients with stroke in recent studies. In this study, we evaluated the prognostic role of NLR in patients with AIS. One hundred forty-three patients with AIS were enrolled. Clinical data were collected and the NLR was calculated from the admission blood work...
February 8, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/28164443/low-level-light-emitting-diode-led-therapy-suppresses-inflammasome-mediated-brain-damage-in-experimental-ischemic-stroke
#2
Hae In Lee, Sae-Won Lee, Nam Gyun Kim, Kyoung-Jun Park, Byung Tae Choi, Yong-Il Shin, Hwa Kyoung Shin
Use of photostimulation including low-level light emitting diode (LED) therapy has broadened greatly in recent years because it is compact, portable, and easy to use. Here, the effects of photostimulation by LED (610 nm) therapy on ischemic brain damage was investigated in mice in which treatment started after a stroke in a clinically relevant setting. The mice underwent LED therapy (20 min) twice a day for 3 days, commencing at 4 hours post-ischemia. LED therapy group generated a significantly smaller infarct size and improvements in neurological function based on neurologic test score...
February 6, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28162903/the-relationship-between-neutrophil-to-lymphocyte-ratio-and-aortic-arch-calcification-in-ischemic-stroke-patients
#3
Shuyu Zhou, Biyang Cai, Yumeng Zhang, Li Wang, Xinfeng Liu, Gelin Xu
BACKGROUND: Inflammation plays a central role in atherogenesis and artery calcification. Although neutrophil-to-lymphocyte ratio (NLR) has been introduced as an inflammatory marker for atherosclerosis, the relationship between NLR and aortic arch calcification (AAC) has not been studied. This study aimed to determine the association between NLR and AAC. METHODS: A total of 749 participants were enrolled. Demographic and clinical data were collected. Degree of AAC in each enrolled patient was determined with Agatston method based on a neck computed tomography angiography...
February 2, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28137866/endothelium-targeted-overexpression-of-heat-shock-protein-27-ameliorates-blood-brain-barrier-disruption-after-ischemic-brain-injury
#4
Yejie Shi, Xiaoyan Jiang, Lili Zhang, Hongjian Pu, Xiaoming Hu, Wenting Zhang, Wei Cai, Yanqin Gao, Rehana K Leak, Richard F Keep, Michael V L Bennett, Jun Chen
The damage borne by the endothelial cells (ECs) forming the blood-brain barrier (BBB) during ischemic stroke and other neurological conditions disrupts the structure and function of the neurovascular unit and contributes to poor patient outcomes. We recently reported that structural aberrations in brain microvascular ECs-namely, uncontrolled actin polymerization and subsequent disassembly of junctional proteins, are a possible cause of the early onset BBB breach that arises within 30-60 min of reperfusion after transient focal ischemia...
February 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28109273/blocking-of-platelet-glycoprotein-receptor-ib-reduces-thrombo-inflammation-in-mice-with-acute-ischemic-stroke
#5
Michael K Schuhmann, Josua Guthmann, Guido Stoll, Bernhard Nieswandt, Peter Kraft, Christoph Kleinschnitz
BACKGROUND: Ischemic stroke causes a strong inflammatory response that includes T cells, monocytes/macrophages, and neutrophils. Interaction of these immune cells with platelets and endothelial cells facilitates microvascular dysfunction and leads to secondary infarct growth. We recently showed that blocking of platelet glycoprotein (GP) receptor Ib improves stroke outcome without increasing the risk of intracerebral hemorrhage. Until now, it has been unclear whether GPIb only mediates thrombus formation or also contributes to the pathophysiology of local inflammation...
January 21, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28101752/the-impact-of-hydrocortisone-treatment-on-neutrophil-gelatinase-associated-lipocalin-release-in-porcine-endotoxemic-shock
#6
E Söderberg, M Eriksson, A Larsson, M Lipcsey
BACKGROUND: A key feature of sepsis is systemic inflammatory activation that could be counteracted by steroids. In this experimental model of systemic inflammation, we sought to investigate whether septic neutrophil activation, evaluated by the plasma levels of neutrophil gelatinase-associated protein (NGAL), is modulated by the timing of hydrocortisone treatment. METHODS: Sixteen anesthetized pigs were allocated to one of four equally sized groups. Three of these groups received endotoxin at 2 μg × kg(-1) × h(-1) for 6 h so as to induce endotoxemic shock...
December 2017: Intensive Care Medicine Experimental
https://www.readbyqxmd.com/read/28073987/neutrophil-lymphocyte-ratio-and-risk-of-atrial-fibrillation-after-thoracic-surgery
#7
Kevin J Walsh, Kay See Tan, Hao Zhang, David Amar
OBJECTIVES: Postoperative atrial fibrillation (POAF) occurs frequently in patients after noncardiac thoracic surgery and has been associated with increased morbidity and risk of stroke. Recent studies have shown conflicting results on the role of neutrophil-lymphocyte ratio (NLR) and its association with the development of POAF after cardiac surgery. Our goal was to determine whether an association exists between NLR and the incidence of POAF after non-cardiac thoracic surgery. METHODS: Using a database of 259 consecutive patients age 60 or older who had anatomic lung resection or oesophagectomy for oncologic resection, we compared preoperative, postanaesthesia care unit and postoperative day 1 NLR between patients who did and did not develop POAF during their hospitalization using Fisher's exact test or logistic regression...
January 10, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28062999/relationship-between-increased-carotid-artery-stiffness-and-idiopathic-subjective-tinnitus
#8
C Bayraktar, S Taşolar
Tinnitus is defined as perception of sound with no external stimulus, and can separate into pulsatile and non-pulsatile types. Arterial stiffness is a parameter that can predict the cardiovascular event and associated with incidence of stroke. It has been shown that increased arterial stiffness may lead to microvascular damage in brain. Our aim was to assess the arterial stiffness of the carotid system in the development and severity of idiopathic subjective tinnitus. Forty subjective tinnitus patients and 40 age- and sex-matched controls were enrolled in the study...
January 6, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28053821/microrna-181c-exacerbates-brain-injury-in-acute-ischemic-stroke
#9
Qingfeng Ma, Haiping Zhao, Zhen Tao, Rongliang Wang, Ping Liu, Ziping Han, Shubei Ma, Yumin Luo, Jianping Jia
MicroRNA-181 (miR-181) is highly expressed in the brain, and downregulated in miRNA expression profiles of acute ischemic stroke patients. However, the roles of miR-181c in stroke are not known. The clinical relevance of miR-181c in acute stroke patients was evaluated by real-time PCR and correlation analyses. Proliferation and apoptosis of BV2 microglial cells and Neuro-2a cells cultured separately or together under oxidative stress or inflammation were assessed with the Cell Counting Kit-8 and by flow cytometry, respectively...
December 2016: Aging and Disease
https://www.readbyqxmd.com/read/28052874/inhibition-of-hdac6-protects-against-rhabdomyolysis-induced-acute-kidney-injury
#10
Shi Yingfeng, Xu Liuqing, Tang Jinhua, Fang Lu, Ma Shuchen, Ma Xiaoyan, Nie Jing, Pi Xiaoling, Qiu Andong, Zhuang Shougang, Liu Na
Histone deacetylase 6 (HDAC6) inhibition has been reported to protect against ischemic stroke and prolong survival after sepsis in animal models. However, it remains unknown whether HDAC6 inhibition offers a renoprotective effect after acute kidney injury (AKI). In this study, we examined the therapeutic effect of tubastatin A (TA), a highly selective inhibitor of HDAC6, on AKI in a murine model of glycerol (GL) injection-induced rhabdomyolysis. Following GL injection, the mice developed severe acute tubular injury as indicated by renal dysfunction, expression of neutrophil gelatinase-associated lipocalin (NGAL), an injury marker of renal tubules and increase of TUNEL positive tubular cells...
January 4, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28049200/a-mouse-model-of-post-stroke-pneumonia-induced-by-intra-tracheal-inoculation-with-streptococcus-pneumoniae
#11
Eva Mracsko, Sabine Stegemann-Koniszewski, Shin-Young Na, Alexander Dalpke, Dunja Bruder, Felix Lasitschka, Roland Veltkamp
BACKGROUND: Stroke-induced immunodeficiency increases the risk of infectious complications, which adversely affects neurological outcome. Among those, pneumonia affects as many as one third of stroke patients and is the main contributor to mortality in the post-acute phase of stroke. Experimental findings on post-stroke susceptibility to spontaneous pneumonia in mice are contradictory. Here, we established a mouse model inducing standardized bacterial pneumonia and characterized the impaired pulmonary cellular and humoral immune responses after experimental stroke...
January 4, 2017: Cerebrovascular Diseases
https://www.readbyqxmd.com/read/28028791/clinical-value-of-neutrophil-to-lymphocyte-and-platelet-to-lymphocyte-ratio-after-aneurysmal-subarachnoid-hemorrhage
#12
Chuanyuan Tao, Jiajing Wang, Xin Hu, Junpeng Ma, Hao Li, Chao You
BACKGROUND: Inflammation and thrombosis are associated with the pathogenesis of aneurysmal subarachnoid hemorrhage (aSAH) and neutrophil to lymphocyte ratio (NLR) and platelet to lymphocyte ratio (PLR) are emerging as novel inflammatory markers in stroke. We aimed to identify the association of NLR and PLR with delayed cerebral ischemia (DCI) and 3-month outcome after aSAH. METHODS: Two hundred and forty-seven patients diagnosed with aSAH within 24 h of symptoms onset were enrolled...
December 27, 2016: Neurocritical Care
https://www.readbyqxmd.com/read/27981484/uric-acid-is-protective-after-cerebral-ischemia-reperfusion-in-hyperglycemic-mice
#13
Carles Justicia, Angélica Salas-Perdomo, Isabel Pérez-de-Puig, Lisette H Deddens, Geralda A F van Tilborg, Clara Castellví, Rick M Dijkhuizen, Ángel Chamorro, Anna M Planas
Hyperglycemia at stroke onset is associated with poor long-term clinical outcome in numerous studies. Hyperglycemia induces intracellular acidosis, lipid peroxidation, and peroxynitrite production resulting in the generation of oxidative and nitrosative stress in the ischemic tissue. Here, we studied the effects of acute hyperglycemia on in vivo intercellular adhesion molecule-1 (ICAM-1) expression, neutrophil recruitment, and brain damage after ischemia/reperfusion in mice and tested whether the natural antioxidant uric acid was protective...
December 15, 2016: Translational Stroke Research
https://www.readbyqxmd.com/read/27956075/natural-product-htp-screening-for-attenuation-of-cytokine-induced-neutrophil-chemo-attractants-cincs-and-no2-in-lps-ifn%C3%AE-activated-glioma-cells
#14
Elizabeth A Mazzio, David Bauer, Patricia Mendonca, Equar Taka, Karam F A Soliman
Chronic and acute central nervous system (CNS) inflammation are contributors toward neurological injury associated with head trauma, stroke, infection, Parkinsons or Alzheimers disease. CNS inflammatory illnesses can also contribute toward risk of developing glioblastoma multiforme (GBM). With growing public interest in complementary and alternative medicines (CAMs), we conduct a high throughput (HTP) screening of >1400 natural herbs, plants and over the counter (OTC) products for anti-inflammatory effects on lipopolysaccharide (LPS)/interferon gamma (IFNγ) activated C6 glioma cells...
January 15, 2017: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/27955949/neutrophil-to-lymphocyte-ratio-is-a-prognostic-marker-in-acute-ischemic-stroke
#15
Jie Xue, Wensi Huang, Xiaoli Chen, Qian Li, Zhengyi Cai, Tieer Yu, Bei Shao
BACKGROUND: Neutrophil-to-lymphocyte ratio is an independent predictor of mortality in patients with acute ischemic stroke. However, it is uncertain whether neutrophil-to-lymphocyte ratio is related with functional outcome and recurrent ischemic stroke. In this study, we aimed to investigate the relationship of neutrophil-to-lymphocyte ratio with stroke severity, functional outcome, and recurrent ischemic stroke after acute ischemic stroke. METHODS: A total of 280 patients with acute ischemic stroke were included in the study...
December 9, 2016: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/27884770/neutrophil-granulocytes-in-cerebral-ischemia-evolution-from-killers-to-key-players
#16
REVIEW
Jan-Kolja Strecker, Antje Schmidt, Wolf-Rüdiger Schäbitz, Jens Minnerup
Neutrophil granulocytes (or polymorphonuclear cells, PMNs) have long been considered as crude killing machines, particularly trained to attack bacterial or fungal pathogens in wounds or infected tissues. That perspective has fundamentally changed over the last decades, as PMNs have been shown to exert a livery exchange between other cells of the innate and adaptive immune system. PMNs do provide major immunomodulatory contribution during acute inflammation and subsequent clearance. Following sterile inflammation like cerebral ischemia, PMNs are among the first hematogenous cells attracted to the ischemic tissue...
November 21, 2016: Neurochemistry International
https://www.readbyqxmd.com/read/27879312/association-of-peripheral-differential-leukocyte-counts-with-dyslipidemia-risk-in-chinese-patients-with-hypertension-insight-from-the-china-stroke-primary-prevention-trial
#17
Yanhong Liu, Xiangyi Kong, Wen Wang, Fangfang Fan, Yan Zhang, Min Zhao, Yi Wang, Yupeng Wang, Yu Wang, Xianhui Qin, Genfu Tang, Binyan Wang, Xiping Xu, Fan Fan Hou, Wei Gao, Ningling Sun, Jianping Li, Scott A Venners, Shanqun Jiang, Yong Huo
The aim of the present study was to examine the association between peripheral differential leukocyte counts and dyslipidemia in a Chinese hypertensive population. A total of 10,866 patients with hypertension were enrolled for a comprehensive assessment of cardiovascular risk factors using data from the China Stroke Primary Prevention Trial. Plasma lipid levels and total leukocyte, neutrophil, and lymphocyte counts were determined according to standard methods. Peripheral differential leukocyte counts were consistently and positively associated with serum total cholesterol (TC), LDL cholesterol (LDL-C), and TG levels (all P < 0...
January 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/27876538/neutrophil-to-lymphocyte-ratio-and-the-hematoma-volume-and-stroke-severity-in-acute-intracerebral-hemorrhage-patients
#18
Yaming Sun, Shoujiang You, Chongke Zhong, Zhichao Huang, Lifang Hu, Xia Zhang, Jijun Shi, Yongjun Cao, Chun-Feng Liu
BACKGROUND: Neutrophil to lymphocyte ratio (NLR) serves as a powerful inflammatory marker for predicting cardiovascular events. Here, we investigate whether admission NLR is associated with hematoma volume, stroke severity, and 3-month outcomes in patients with acute intracerebral hemorrhage (ICH). METHODS: 352 patients with acute ICH were prospectively identified in this study. Demographic characteristics, lifestyle risk factors, NIHSS score, hematoma volumes, and other clinical features were recorded for all participants...
November 16, 2016: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27845194/human-albumin-attenuates-excessive-innate-immunity-via-inhibition-of-microglial-mincle-syk-signaling-in-subarachnoid-hemorrhage
#19
Yi Xie, Hongquan Guo, Liumin Wang, Lili Xu, Xiaohao Zhang, Linjie Yu, Qian Liu, Yunzi Li, Nana Zhao, Nan Zhao, Ruidong Ye, Xinfeng Liu
Subarachnoid hemorrhage (SAH) is a devastating subtype of stroke. Microglial macrophage-inducible C-type lectin (Mincle) receptor launches microglial innate immunity after SAH, and thereby achieves a key step of early cerebral injury in SAH. We previously revealed albumin could improve long-term neurological outcomes after SAH. In this study, we examined the role of microglia-mediated innate immunity in the salutary effects of albumin. SAH was induced by endovascular perforation in rats. We found that albumin can significantly mitigate early neurovascular dysfunction of SAH rats...
February 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27826338/is-syntax-score-predictive-of-atrial-fibrillation-after-on-pump-coronary-artery-bypass-graft-surgery
#20
Levent Cerit, Hamza Duygu, Kamil Gulsen, Hatice S Kemal, Barcın Ozcem, Ozlem Balcioglu, Aziz Gunsel, Ozgur Tosun, Volkan Emren
BACKGROUND AND OBJECTIVES: The relationship of synergy between percutaneous coronary intervention with taxus and cardiac surgery (SYNTAX) score and development of atrial fibrillation (AF) after coronary artery bypass surgery (CABG) has not been studied. Therefore, we assessed the relationship between the SYNTAX score and development of AF after CABG (POAF). SUBJECTS AND METHODS: The medical records of consecutive patients, who underwent CABG surgery from January 2013 to September 2015, were retrospectively reviewed for the development of AF in the postoperative period...
November 2016: Korean Circulation Journal
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