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https://www.readbyqxmd.com/read/28203206/mild-and-short-term-caloric-restriction-prevents-obesity-induced-cardiomyopathy-in-young-zucker-rats-without-changing-in-metabolites-and-fatty-acids-cardiac-profile
#1
Gema Ruiz-Hurtado, Concha F García-Prieto, Helena Pulido-Olmo, Juan P Velasco-Martín, Palmira Villa-Valverde, María E Fernández-Valle, Lisardo Boscá, María Fernández-Velasco, Javier Regadera, Beatriz Somoza, María S Fernández-Alfonso
Caloric restriction (CR) ameliorates cardiac dysfunction associated with obesity. However, most of the studies have been performed under severe CR (30-65% caloric intake decrease) for several months or even years in aged animals. Here, we investigated whether mild (20% food intake reduction) and short-term (2-weeks) CR prevented the obese cardiomyopathy phenotype and improved the metabolic profile of young (14 weeks of age) genetically obese Zucker fa/fa rats. Heart weight (HW) and HW/tibia length ratio was significantly lower in fa/fa rats after 2 weeks of CR than in counterparts fed ad libitum...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28198160/oxidative-stress-gene-polymorphisms-may-have-impact-in-the-development-of-ischemic-stroke
#2
Bensu Karahalil, Aylin Elkama, Gürdal Orhan
INTRODUCTION: Antioxidants are responsible for detoxification of harmful effects of ROS. Genetic factors may influence antioxidant activity due to polymorphisms on antioxidant enzymes. These polymorphisms can be risk in ischemic stroke (IS) risk. IS is a disorder with genetic and environmental factors contributing to overall risk. Although there have been a few studies there have been no reports on Catalase; CAT C262T, manganese superoxide dismutase; MnSOD Ala16Val, glutathione peroxidase 1; GPX1 Pro198Leu gene polymorphisms and the risk of IS...
February 15, 2017: Journal of Gene Medicine
https://www.readbyqxmd.com/read/28192232/real-time-quantification-of-subcellular-h202-and-glutathione-redox-potential-in-living-cardiovascular-tissues
#3
Emiliano Panieri, Carlo Millia, Massimo M Santoro
Detecting and measuring the dynamic redox events that occur in vivo is a prerequisite for understanding the impact of oxidants and redox events in normal and pathological conditions. These aspects are particularly relevant in cardiovascular tissues wherein alterations of the redox balance are associated with stroke, aging, and pharmacological intervention. An ambiguous aspect of redox biology is how redox events occur in subcellular organelles including mitochondria, and nuclei. Genetically-encoded Rogfp2 fluorescent probes have become powerful tools for real-time detection of redox events...
February 10, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28188261/role-of-genetic-variation-in-collateral-circulation-in-the-evolution-of-acute-stroke-a-multimodal-magnetic-resonance-imaging-study
#4
Yu-Chieh Jill Kao, Esteban A Oyarzabal, Hua Zhang, James E Faber, Yen-Yu Ian Shih
BACKGROUND AND PURPOSE: No studies have determined the effect of differences in pial collateral extent (number and diameter), independent of differences in environmental factors and unknown genetic factors, on severity of stroke. We examined ischemic tissue evolution during acute stroke, as measured by magnetic resonance imaging and histology, by comparing 2 congenic mouse strains with otherwise identical genetic backgrounds but with different alleles of the Determinant of collateral extent-1 (Dce1) genetic locus...
February 10, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28187799/management-of-intracerebral-hemorrhage
#5
A M Thabet, M Kottapally, J Claude Hemphill
Intracerebral hemorrhage (ICH) is a potentially devastating neurologic injury representing 10-15% of stroke cases in the USA each year. Numerous risk factors, including age, hypertension, male gender, coagulopathy, genetic susceptibility, and ethnic descent, have been identified. Timely identification, workup, and management of this condition remain a challenge for clinicians as numerous factors can present obstacles to achieving good functional outcomes. Several large clinical trials have been conducted over the prior decade regarding medical and surgical interventions...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28185829/a-systematic-review-of-the-literature-for-severity-predictors-in-children-with-sickle-cell-anemia
#6
Emily Riehm Meier, Ross M Fasano, Paul R Levett
All patients with HbSS (SCA) share the same genetic mutation but the clinical phenotype is variable and difficult to predict early in life. A reliable severity predictor would be invaluable toward directing therapeutic decisions in those patients at highest risk of SCA complications. A search of PubMed, Cochrane Clinical Trials Register, and Scopus was performed to determine which SCA severity predictors have been validated in pediatric patients. The full text of 94 of the 590 references identified was reviewed based on the title/abstract...
February 2, 2017: Blood Cells, Molecules & Diseases
https://www.readbyqxmd.com/read/28185308/medical-cost-savings-in-sakado-city-and-worldwide-achieved-by-preventing-disease-by-folic-acid-fortification
#7
REVIEW
Yasuo Kagawa, Mami Hiraoka, Mitsuyo Kageyama, Yoshiko Kontai, Mayumi Yurimoto, Chiharu Nishijima, Kaori Sakamoto
The introduction of mandatory fortification of grains with folate in 1998 in the United States resulted in 767 fewer spina bifida cases annually and a cost savings of $603 million per year. However, far more significant medical cost savings result from preventing common diseases, including myocardial infarction, stroke, dementia and osteoporosis. A cost-effectiveness analysis showed a gain of 266,649 quality-adjusted life-years and $3.6 billion saved annually, mainly due to the reduction of cardiac infarction...
February 9, 2017: Congenital Anomalies
https://www.readbyqxmd.com/read/28181217/hypercoagulability-and-migraine
#8
Gretchen E Tietjen, Stuart A Collins
BACKGROUND: A growing body of literature suggests that migraineurs, particularly those with aura, have an increased risk for ischemic stroke, but not via enhanced atherosclerosis. The theory that micro-emboli induced ischemia provokes cortical spreading depression (ie, symptomatic aura) in migraineurs but transient ischemic attacks in others highlights a potential role for hypercoagulability as a link between migraine (with aura) and stroke. AIM: Our objective is to summarize the literature evaluating the association of migraine with various acquired or inheritable thrombophilic states, including those related to elevated estrogen levels, endothelial activation and dysfunction, antiphospholipid antibodies (aPL), deficiency of coagulation inhibitors, and presence of certain genetic polymorphisms...
February 9, 2017: Headache
https://www.readbyqxmd.com/read/28171870/methylene-tetrahydrofolate-reductase-mthfr-rs868014-polymorphism-regulated-by-mir-1203-associates-with-risk-and-short-term-outcome-of-ischemic-stroke
#9
Wei He, Minzhi Lu, Guoqing Li, Zhigang Sun, Dinghua Liu, Lujun Gu
BACKGROUND/AIMS: Genetic polymorphisms of methylene tetrahydrofolate reductase (MTHFR) were associated with ischemic stroke risk. This study analyzed MTHFR polymorphisms at the 3'-untranslated region for association with risk and outcome of ischemic stroke in a Chinese Han population. METHODS: 500 patients and 600 healthy volunteers were enrolled for MTHFR rs868014 genotyping identified bioinformatically. The binding of miR-1203 to MTHFR rs868014 was determined by luciferase assay, MTHFR expression was assessed using qRT-PCR, and plasma homocysteine levels were assayed by ELISA...
February 8, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28169950/update-about-atrial-fibrillation-genetics
#10
Alexandra Pérez-Serra, Oscar Campuzano, Ramon Brugada
PURPOSE OF REVIEW: Atrial fibrillation is an important cause of morbidity in the aging population. The mechanisms responsible for the triggering and maintenance of the chaotic atrial rhythm are still poorly understood. In this review, we will focus on the genetic aspects of atrial fibrillation, to understand causality, with special emphasis on recent studies published in the field. RECENT FINDINGS: Diseases such as hypertension, valvular heart disease, and heart failure may induce atrial fibrillation, which increases the risk of stroke and sudden cardiac death...
February 4, 2017: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/28164424/filaggrin-loss-of-function-mutations-as-risk-factors-for-ischemic-stroke-in-the-general-population
#11
Anette Varbo, Børge G Nordestgaard, Marianne Benn
BACKGROUND: Heritability studies have shown a considerable genetic component to ischemic stroke risk; however, much is unknown as to which genes are responsible. Also, previous studies have found an association between atopic dermatitis and increased ischemic stroke risk. OBJECTIVE: To test the hypothesis that FLG loss-of-function mutations, known to be associated with atopic dermatitis, were also associated with ischemic stroke. METHODS: 97,174 individuals, with 3,597 cases of ischemic stroke, from the Copenhagen General Population Study, the Copenhagen City Heart Study, and the Copenhagen Carotid Stroke Study were genotyped for the two most common filaggrin mutations, FLG R501X and FLG 2282del4...
February 6, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28155625/ethnic-and-geographical-differences-in-ischaemic-stroke-among-young-adults
#12
Nilufer Yesilot, Jukka Putaala, Sara Zarko Bahar, Turgut Tatlısumak
Ischaemic stroke in young adults encompasses approximately 5 - 15% of all ischaemic strokes, depending on the selected upper age limit. The key features of the disease, including incidence, risk factors, underlying causes, mortality, outcomes, as well as long-term risks of recurrent events are different from those for elderly patients. There is also evidence indicating that these characteristics may differ ethnically and geographically. It is clinically important to recognize such differences not only for correct diagnosis and treatment, but also for introducing accurate preventive measures...
February 2, 2017: Current Vascular Pharmacology
https://www.readbyqxmd.com/read/28154105/vascular-cognitive-impairment
#13
Martin Dichgans, Didier Leys
Cerebrovascular disease typically manifests with stroke, cognitive impairment, or both. Vascular cognitive impairment refers to all forms of cognitive disorder associated with cerebrovascular disease, regardless of the specific mechanisms involved. It encompasses the full range of cognitive deficits from mild cognitive impairment to dementia. In principle, any of the multiple causes of clinical stroke can cause vascular cognitive impairment. Recent work further highlights a role of microinfarcts, microhemorrhages, strategic white matter tracts, loss of microstructural tissue integrity, and secondary neurodegeneration...
February 3, 2017: Circulation Research
https://www.readbyqxmd.com/read/28154098/stroke-risk-factors-genetics-and-prevention
#14
Amelia K Boehme, Charles Esenwa, Mitchell S V Elkind
Stroke is a heterogeneous syndrome, and determining risk factors and treatment depends on the specific pathogenesis of stroke. Risk factors for stroke can be categorized as modifiable and nonmodifiable. Age, sex, and race/ethnicity are nonmodifiable risk factors for both ischemic and hemorrhagic stroke, while hypertension, smoking, diet, and physical inactivity are among some of the more commonly reported modifiable risk factors. More recently described risk factors and triggers of stroke include inflammatory disorders, infection, pollution, and cardiac atrial disorders independent of atrial fibrillation...
February 3, 2017: Circulation Research
https://www.readbyqxmd.com/read/28151554/activity-dependent-modulation-of-intracellular-atp-in-cultured-cortical-astrocytes
#15
Ulrike Winkler, Pauline Seim, Yvonne Enzbrenner, Susanne Köhler, Marit Sicker, Johannes Hirrlinger
Brain function is absolutely dependent on an appropriate supply of energy. A shortfall in supply-as occurs, for instance, following stroke-can lead rapidly to irreversible damage to this vital organ. While the consequences of pathophysiological energy depletion have been well documented, much less is known about the physiological energy dynamics of brain cells, although changes in the intracellular concentration of adenosine triphosphate (ATP), the major energy carrier of cells, have been postulated to contribute to cellular signaling...
February 2, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/28145521/the-association-between-hdac9-gene-polymorphisms-and-stroke-risk-in-the-chinese-population-a-meta-analysis
#16
Xin Zhou, Tangming Guan, Shuyuan Li, Zinan Jiao, Xiaoshuang Lu, Xiaodi Huang, Yuhua Ji, Qiuhong Ji
Several recent genome-wide association studies (GWASs) have suggested that the histone deacetylase 9 (HDAC9) gene is associated with stroke, but the reliability of these findings remains controversial, particularly for the data derived from different ethnicities and geographical locations. Therefore, we performed a meta-analysis to explore the associations between HDAC9 polymorphisms and the risk of stroke in the Chinese population. All eligible case-control studies that met the search criteria were retrieved from multiple databases, and six case-control studies with a total of 2,356 stroke patients and 3,420 healthy controls were included...
February 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28123700/circulating-nucleic-acids-an-analysis-of-their-occurrence-in-malignancies
#17
Shankar Suraj, Chirag Dhar, Sweta Srivastava
Through a regulated or fortuitous phenomenon, small portions of cell nucleic acids are thrown into circulation. Since the discovery of these circulating nucleic acids (CNAs) in 1948, numerous studies have been published to elucidate their clinical implications in multifarious diseases. Scientists have now discovered disease-specific genetic aberrations, such as mutations, microsatellite alterations, epigenetic modulations (including aberrant methylation), as well as viral DNA/RNA from nucleic acids in plasma and serum...
January 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28116327/constitutional-de-novo-and-postzygotic-mutations-in-isolated-cases-of-cerebral-cavernous-malformations
#18
Matthias Rath, Stefanie Spiegler, Neetika Nath, Konrad Schwefel, Nataliya Di Donato, Johannes Gerber, G Christoph Korenke, Yorck Hellenbroich, Ute Hehr, Stephanie Gross, Ulrich Sure, Barbara Zoll, Eberhard Gilberg, Lars Kaderali, Ute Felbor
BACKGROUND: Cerebral cavernous malformations (CCM) are vascular lesions of the central nervous system that can be found in sporadic or autosomal dominantly inherited forms and manifest with headaches, seizures, and hemorrhagic stroke. The precise proportion of de novo mutations in the CCM1,CCM2, and CCM3 genes remains unknown. METHODS: We here present a series of six trios with de novo mutations that have been analyzed by amplicon deep sequencing to differentiate between constitutional and postzygotic mutations...
January 2017: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/28115703/complementary-roles-of-gasotransmitters-co-and-h2s-in-sleep-apnea
#19
Ying-Jie Peng, Xiuli Zhang, Anna Gridina, Irina Chupikova, David L McCormick, Robert J Thomas, Thomas E Scammell, Gene Kim, Chirag Vasavda, Jayasri Nanduri, Ganesh K Kumar, Gregg L Semenza, Solomon H Snyder, Nanduri R Prabhakar
Sleep apnea, which is the periodic cessation of breathing during sleep, is a major health problem affecting over 10 million people in the United States and is associated with several sequelae, including hypertension and stroke. Clinical studies suggest that abnormal carotid body (CB) activity may be a driver of sleep apnea. Because gaseous molecules are important determinants of CB activity, aberrations in their signaling could lead to sleep apnea. Here, we report that mice deficient in heme oxygenase-2 (HO-2), which generates the gaseous molecule carbon monoxide (CO), exhibit sleep apnea characterized by high apnea and hypopnea indices during rapid eye movement (REM) sleep...
February 7, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28115328/myocardial-infarction-in-the-wisconsin-longitudinal-study-the-interaction-among-environmental-health-social-behavioural-and-genetic-factors
#20
Tina K Gonzales, James A Yonker, Vicky Chang, Carol L Roan, Pamela Herd, Craig S Atwood
OBJECTIVES: This study examined how environmental, health, social, behavioural and genetic factors interact to contribute to myocardial infarction (MI) risk. DESIGN: Survey data collected by Wisconsin Longitudinal Study (WLS), USA, from 1957 to 2011, including 235 environmental, health, social and behavioural factors, and 77 single- nucleotide polymorphisms were analysed for association with MI. To identify associations with MI we utilized recursive partitioning and random forest prior to logistic regression and chi-squared analyses...
January 23, 2017: BMJ Open
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