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https://www.readbyqxmd.com/read/28721832/biomarkers-associated-with-bleeding-risk-in-the-setting-of-atrial-fibrillation
#1
Skevos Sideris, Stefanos Archontakis, George Latsios, George Lazaros, Konstantinos Toutouzas, Eleftherios Tsiamis, Manolis Vavuranakis, Charalampos Vlachopoulos, Konstantinos Gatzoulis, Konstantinos Tsioufis, Dimitris Tousoulis
Background Prevention of thromboembolic disease, mainly stroke, with oral anticoagulants remains a major therapeutic goal in patients with atrial fibrillation. Unfortunately, despite the high efficacy, anticoagulant therapy is associated with a significant risk of, frequently catastrophic, hemorrhagic complications. Among different clinical and laboratory parameters related to an increased risk of bleeding, several biological markers have been recognized and various risk scores for bleeding have been developed...
July 18, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28721825/biomarkers-associated-with-stroke-risk-in-atrial-fibrillation
#2
Adam Ioannou, Nikolaos Papageorgiou, Debbie Falconer, Onkar Rehal, Emma Sewart, Effimia Zacharia, Konstantinos Toutouzas, Charalampos Vlachopoulos, Gerasimos Siasos, Constantinos Tsioufis, Dimitris Tousoulis
Atrial fibrillation is associated with increased risk for cardioembolic stroke. The risk of cardioembolism is not adequately reduced with the administration of oral anticoagulants, since a number of patients continue to experience thromboembolic events despite receiving anti-thrombotic treatment. Several biomarkers have been proposed to predict cardioembolic stroke in patients with atrial fibrillation. Some of them are already used in the clinical practice, such as D-Dimers, Troponin and brain natriuretic peptide...
July 18, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28721654/c-reactive-protein-gene-contributes-to-the-genetic-susceptibility-of-hemorrhagic-stroke-in-men-a-case-control-study-in-chinese-han-population
#3
Yong Xue, Long Zhang, Yao Fan, Qianhui Li, Yuzhang Jiang, Chong Shen
High-sensitivity C-reactive protein (hsCRP) is an inflammatory marker for the prediction and prognosis of ischemic stroke but there is an absence of evidence for cerebral hemorrhagic events. The aim of this study is to investigate the effects of elevated plasma hsCRP and CRP genetic variants on hemorrhagic stroke (HS). Two hundred thirty-six inpatients with HS and 993 age-matched controls from a community-based population were included in a case-control study and four tagging single nucleotide polymorphsims (tagSNPs) at CRP were genotyped...
July 18, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28721356/targeted-ischemic-stroke-induction-and-mesoscopic-imaging-assessment-of-blood-flow-and-ischemic-depolarization-in-awake-mice
#4
Matilde Balbi, Matthieu P Vanni, Gergely Silasi, Yuki Sekino, Luis Bolanos, Jeffrey M LeDue, Timothy H Murphy
Despite advances in experimental stroke models, confounding factors such as anesthetics used during stroke induction remain. Furthermore, imaging of blood flow during stroke is not routinely done. We take advantage of in vivo bihemispheric transcranial windows for longitudinal mesoscopic imaging of cortical function to establish a protocol for focal ischemic stroke induction in target brain regions using photothrombosis in awake head-fixed mice. Our protocol does not require any surgical steps at the time of stroke induction or anesthetics during either head fixation or photoactivation...
July 2017: Neurophotonics
https://www.readbyqxmd.com/read/28720827/small-chaperons-and-autophagy-protected-neurons-from-necrotic-cell-death
#5
Ye Lei, Kai Liu, Lin Hou, Lianggong Ding, Yuhong Li, Lei Liu
Neuronal necrosis occurs during early phase of ischemic insult. However, our knowledge of neuronal necrosis is still inadequate. To study the mechanism of neuronal necrosis, we previously established a Drosophila genetic model of neuronal necrosis by calcium overloading through expression of a constitutively opened cation channel mutant. Here, we performed further genetic screens and identified a suppressor of neuronal necrosis, CG17259, which encodes a seryl-tRNA synthetase. We found that loss-of-function (LOF) CG17259 activated eIF2α phosphorylation and subsequent up-regulation of chaperons (Hsp26 and Hsp27) and autophagy...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28720568/serine-proteases-of-the-complement-lectin-pathway-and-their-genetic-variations-in-ischaemic-stroke
#6
Gohar Tsakanova, Ani Stepanyan, Karen Nahapetyan, Robert B Sim, Arsen Arakelyan, Anna Boyajyan
AIMS: The aim of the current study was to assess the proteolytic activities of collectin-bound MASP-1 and MASP-2 in the blood of patients with ischaemic stroke, as well as the association of their six genetic polymorphisms (rs3203210, rs28945070, rs28945073 in MASP1 gene and rs2273343, rs12711521, rs147270785 in MASP2 gene) with this pathology. METHODS: In total, 250 patients and 300 healthy subjects were involved in this study. MBL-associated serine protease (MASP)-1 and MASP-2 activities were measured using in-house developed immunofluorescent and enzyme-linked immunosorbent assays, respectively...
July 18, 2017: Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28719803/elevated-sterol-regulatory-elementary-binding-protein-1-and-glua2-levels-in-the-hippocampal-nuclear-fraction-of-genetic-absence-epilepsy-rats-from-strasbourg
#7
Sathiya Sekar, Entesar Omran, Venkat Gopalakrishnan, John G Howland, Terrance P Snutch, Changiz Taghibiglou
Studies in animal models and human tissues show that nuclear translocation of sterol regulatory element binding protein 1 (SREBP1) and glutamate A2 subunit (GluA2) of cell-surface AMPA receptor (AMPAR) trigger neuronal excitotoxicity-induced apoptosis in stroke. However, it is not known whether a similar type of underlying pathophysiology occurs in absence epilepsy. To explore this issue, we examined the levels of mature SREBP1, GluA2, glyceraldehyde 3-phosphate dehydrogenase (GAPDH), p53, and activated to total caspase 3 ratio in nuclear fractions (NF) of hippocampal homogenate from 8 to 10 week old male Genetic Absence Epilepsy Rats from Strasbourg (GAERS) and non-epileptic control (NEC) strains...
July 12, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28718048/joint-effects-of-gwas-snps-in-coagulation-system-confer-risk-to-hypertensive-intracerebral-hemorrhage
#8
Yanyan Cao, Min Tian, Qin Fang, Zheng Wen, Wei Wang, Hu Ding, Dao Wen Wang
Recent genome-wide association studies (GWAS) have identified numerous single nucleotide polymorphisms (SNPs) associated with coagulation system, including hemostatic factors and hematological phenotypes. However, few articles described the relationships between these SNPs and the risk of hemorrhagic stroke. The aim of our study was to evaluate the roles of these SNPs as risk factors and survival predictors for hemorrhagic stroke. Thirteen SNPs from GWAS in coagulation system were genotyped in a Chinese Han population including 1000 patients with hemorrhagic stroke (intracerebral hemorrhage, ICH = 743; subarachnoid hemorrhage, SAH = 257) and 1044 population-based controls...
July 17, 2017: Neuromolecular Medicine
https://www.readbyqxmd.com/read/28717939/neonatal-stroke-and-haematuria-answers
#9
Sally Kellett, Mathieu Lemaire, Steven P Miller, Christoph Licht, Grace Yoon, Nomazulu Dlamini, Damien Noone
BACKGROUND: This is a report of an infant born near term with neonatal stroke and haematuria. The renal phenotype, pathogenic genotype and pathological findings on renal biopsy are discussed. CASE-DIAGNOSIS: Prenatal magnetic resonance imaging revealed anomalies which persisted postnatally. Haematuria was detected during follow-up. The posttnatal renal ultrasound scan was normal, and there was no associated proteinuria. A likely pathogenic genetic mutation was detected...
July 17, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28717936/neonatal-stroke-and-haematuria-questions
#10
Sally Kellett, Mathieu Lemaire, Steven P Miller, Christoph Licht, Grace Yoon, Nomazulu Dlamini, Damien Noone
This is a report of an infant born near term with neonatal stroke and haematuria. Changes were noted on foetal magnetic resonance images, and these persisted postnatally. A routine renal ultrasound scan during follow-up detected haematuria with no associated proteinuria. A likely pathogenic genetic mutation was identified. This case highlights a relatively newly discovered cause for hereditary nephropathy affecting the basement membrane, initially affecting the glomerular but later the renal tubular basement membranes...
July 17, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28716792/influence-of-family-history-on-the-willingness-of-outpatients-to-undergo-genetic-testing-for-salt-sensitive-hypertension-a-cross-sectional-study
#11
Taro Takeshima, Masanobu Okayama, Ryusuke Ae, Masanori Harada, Eiji Kajii
OBJECTIVES: It is unclear whether family medical history influences the willingness to undergo genetic testing. This study aimed to determine how family history affected the willingness to undergo genetic testing for salt-sensitive hypertension in patients with and without hypertension. DESIGN: Cross-sectional study using a self-administered questionnaire. SETTING: Six primary care clinics and hospitals in Japan. PARTICIPANTS: Consecutive 1705 outpatients aged >20 years, 578 of whom had hypertension...
July 17, 2017: BMJ Open
https://www.readbyqxmd.com/read/28716248/interleukin-6-il-6-rs1800796-and-cyclin-dependent-kinase-inhibitor-cdkn2a-cdkn2b-rs2383207-are-associated-with-ischemic-stroke-in-indigenous-west-african-men
#12
Rufus Akinyemi, Donna K Arnett, Hemant K Tiwari, Bruce Ovbiagele, Fred Sarfo, Vinodh Srinivasasainagendra, Marguerite Ryan Irvin, Abiodun Adeoye, Rodney T Perry, Albert Akpalu, Carolyn Jenkins, Lukman Owolabi, Reginald Obiako, Kolawole Wahab, Emmanuel Sanya, Morenikeji Komolafe, Michael Fawale, Philip Adebayo, Godwin Osaigbovo, Taofiki Sunmonu, Paul Olowoyo, Innocent Chukwuonye, Yahaya Obiabo, Onoja Akpa, Sylvia Melikam, Raelle Saulson, Raj Kalaria, Adesola Ogunniyi, Mayowa Owolabi
BACKGROUND: Inherited genetic variations offer a possible explanation for the observed peculiarities of stroke in sub - Saharan African populations. Interleukin-6 polymorphisms have been previously associated with ischemic stroke in some non-African populations. AIM: Herein we investigated, for the first time, the association of genetic polymorphisms of IL-6, CDKN2A- CDKN2B and other genes with ischemic stroke among indigenous West African participants in the Stroke Investigative Research and Education Network (SIREN) Study...
August 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28711293/a-genetic-study-of-factor-v-leiden-g1691a-mutation-in-young-ischemic-strokes-with-large-vessel-disease-in-a-south-indian-population
#13
Ravi Anadure, Rita Christopher, Dindagur Nagaraja, Coimbatore Narayanan
Factor V Leiden (FVL) has been, by far, the most investigated gene mutation, with 26 studies to date, on its role in arterial strokes. Overall, a meta-analysis of all these studies taken together showed that carriers of the Factor V Leiden allele were 1.33times more likely to develop arterial strokes when compared to controls. We subjected a highly select subset of young strokes, with large vessel infarcts, to genetic analysis for FVL mutation and compared them with matched healthy controls to look for a statistically significant association...
July 12, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28710330/assessment-of-the-interaction-of-age-and-sex-on-90-day-outcome-after-intracerebral-hemorrhage
#14
Michael L James, Carl D Langefeld, Padmini Sekar, Charles J Moomaw, Mitchell S V Elkind, Bradford B Worrall, Kevin N Sheth, Sharyl R Martini, Jennifer Osborne, Daniel Woo
OBJECTIVE: Because age affects hormonal production differently in women compared with men, we sought to define sex and age interactions across a multiracial/ethnic population after intracerebral hemorrhage (ICH) to uncover evidence that loss of gonadal hormone production would result in loss of the known neuroprotective effects of gonadal hormones. METHODS: Clinical and radiographic data from participants in the Ethnic/Racial Variations of Intracerebral Hemorrhage study and the Genetic and Environmental Risk Factors for Hemorrhagic Stroke study prior to December 2013 were used...
July 14, 2017: Neurology
https://www.readbyqxmd.com/read/28706949/genetic-variant-of-kalirin-gene-is-associated-with-ischemic-stroke-in-a-chinese-han-population
#15
Hong Li, Shasha Yu, Rui Wang, Zhaoqing Sun, Xinghu Zhou, Liqiang Zheng, Zhihua Yin, Xingang Zhang, Yingxian Sun
INTRODUCTION: Ischemic stroke is a complex disorder resulting from the interplay of genetic and environmental factors. Previous studies showed that kalirin gene variations were associated with cardiovascular disease. However, the association between this gene and ischemic stroke was unknown. We performed this study to confirm if kalirin gene variation was associated with ischemic stroke. METHODS: We enrolled 385 ischemic stroke patients and 362 controls from China...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28704403/genetic-variants-of-ptgs2-txa2r-and-txas1-are-associated-with-carotid-plaque-vulnerability-platelet-activation-and-txa2-levels-in-ischemic-stroke-patients
#16
Xingyang Yi, Jing Lin, Hua Luo, Chun Wang, Yingying Liu
Eicosanoids may play a role in ischemic stroke. However, the associations of variants in cyclooxygenase (COX) pathway genes and interaction among these variants with carotid plaque vulnerability are not fully understood. In present study, twelve variants in COX pathway genes were examined using matrix-assisted laser desorption ionization time-of-flight mass spectrometry method in 396 patients with ischemic stroke and 291 controls. Platelet aggregation, platelet-leukocyte aggregates, and urine 11-dehydrothromboxane B2 (11-dTxB2) were also measured...
2017: PloS One
https://www.readbyqxmd.com/read/28702747/management-of-supine-hypertension-complicating-neurogenic-orthostatic-hypotension
#17
Jacquie Baker, Kurt Kimpinski
Neurogenic orthostatic hypotension (NOH) can be present in a number of disorders, including synucleinopathies, autoimmune disorders, and various genetic disorders. All are characterized by defective norepinephrine release from sympathetic terminals upon standing, resulting in impaired vasoconstriction. NOH is defined as a drop in systolic blood pressure ≥20 mmHg or diastolic blood pressure ≥10 mmHg, or both, within 3 minutes of standing or head up-tilt at a minimum of 60°. However, approximately 50% of patients have associated supine hypertension, which greatly complicates treatment...
July 12, 2017: CNS Drugs
https://www.readbyqxmd.com/read/28698285/therapeutic-antibody-targeting-of-notch3-signaling-prevents-mural-cell-loss-in-cadasil
#18
Arturo I Machuca-Parra, Alexander A Bigger-Allen, Angie V Sanchez, Anissa Boutabla, Jonathan Cardona-Vélez, Dhanesh Amarnani, Magali Saint-Geniez, Christian W Siebel, Leo A Kim, Patricia A D'Amore, Joseph F Arboleda-Velasquez
Cerebral autosomal-dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) is a neurological syndrome characterized by small vessel disease (SVD), stroke, and vascular cognitive impairment and dementia caused by mutations in NOTCH3 No therapies are available for this condition. Loss of mural cells, which encompass pericytes and vascular smooth muscle cells, is a hallmark of CADASIL and other SVDs, including diabetic retinopathy, resulting in vascular instability. Here, we showed that Notch3 signaling is both necessary and sufficient to support mural cell coverage in arteries using genetic rescue in Notch3 knockout mice...
July 11, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28697711/biomarkers-of-stroke-recovery-consensus-based-core-recommendations-from-the-stroke-recovery-and-rehabilitation-roundtable
#19
Lara A Boyd, Kathryn S Hayward, Nick S Ward, Cathy M Stinear, Charlotte Rosso, Rebecca J Fisher, Alexandre R Carter, Alex P Leff, David A Copland, Leeanne M Carey, Leonardo G Cohen, D Michele Basso, Jane M Maguire, Steven C Cramer
The most difficult clinical questions in stroke rehabilitation are "What is this patient's potential for recovery?" and "What is the best rehabilitation strategy for this person, given her/his clinical profile?" Without answers to these questions, clinicians struggle to make decisions regarding the content and focus of therapy, and researchers design studies that inadvertently mix participants who have a high likelihood of responding with those who do not. Developing and implementing biomarkers that distinguish patient subgroups will help address these issues and unravel the factors important to the recovery process...
July 2017: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/28697681/a-particularly-complex-case-of-matricide-by-means-of-plastic-bag-suffocation-case-report
#20
Arnaldo Stanislao Migliorini, Michele Boracchi, Guendalina Gentile, Francesca Maciocco, Andrea Piccinini, Riccardo Zoja
A rare case of homicide with plastic bag suffocation is presented in which forensic genetic investigations were carried out on the inner surface of a plastic bag placed over the head of an elderly woman, bedridden after a stroke. The results obtained suggested that she had been murdered and hinted at the perpetrator of the crime. In fact, it emerged that biological traces left by the victim matched those of her principal caregiver, her psychotic daughter, who later confessed to the crime. The old woman also had a son affected by a serious illness, whose genetic profile was found on the same bag...
January 1, 2017: Medicine, Science, and the Law
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