keyword
MENU ▼
Read by QxMD icon Read
search

homocystein

keyword
https://www.readbyqxmd.com/read/28215036/serum-levels-of-homocysteine-at-admission-are-associated-with-post-stroke-depression-in-acute-ischemic-stroke
#1
Yan Li, Li-Li Cao, Lin Liu, Qin-De Qi
The primary purpose of this study was to assess the serum levels of homocysteine (HCY) at admission to the presence of post-stroke depression (PSD). From September 2014 to December 2015, first-ever acute ischemic stroke patients within the first 24 h after stroke onset were consecutively recruited and followed-up for 3 months. Based on the symptoms, diagnoses of depression were made in accordance with DSM-IV criteria for depression. By the time of 3 month after stroke, 238 had finished the follow-up and included in our study...
February 18, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28214688/h2s-causes-contraction-and-relaxation-of-major-arteries-of-the-rabbit
#2
Martin Caprnda, Tawar Qaradakhi, Joanne L Hart, Nazarii Kobyliak, Radka Opatrilova, Peter Kruzliak, Anthony Zulli
OBJECTIVE: Cardiovascular disease (CVD) caused by atherosclerosis remains a worldwide burden. Hydrogen sulfide is a promising new therapeutic avenue for the treatment of CVD, however reports show exogenous H2S has both vasodilator and vasoconstrictor effects depending on organ examined, and in vitro studies in animal models which are not resistant to developing atherosclerosis are limited. We sought to determine if rabbit arteries constricted or dilated to hydrogen sulfide. MATERIAL AND METHODS: The aorta, carotid, renal and iliac arteries were harvested from New Zealand White rabbits (n=4) and subjected to a concentration response curve to the fast H2S releaser NaHS...
February 16, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28213216/graphene-quantum-dots-decorated-with-maleimide-and-zinc-tetramaleimido-phthalocyanine-application-in-the-design-of-off-on-fluorescence-sensors-for-biothiols
#3
Ojodomo J Achadu, Tebello Nyokong
The fabrication of maleimide-derivatized graphene quantum dots (M-GQDs) and zinc phthalocyanine (2) as novel sensor probes for the selective detection of biothiols (cysteine, homocysteine or glutathione) through the rapid and specific Michael addition reaction between biothiols and the maleimide-derivatized probes is presented in this study. GQDs directly functionalized with maleimide units (M-GQDs) were synthesized and deployed for biothiols recognition following the principle of Michael addition. M-GQDs probe was found to be highly sensitive and selective towards biothiols detection in the nanomolar range in aqueous solution and at physiological pH (7...
May 1, 2017: Talanta
https://www.readbyqxmd.com/read/28212902/intrauterine-valproate-exposure-is-associated-with-alterations-in-hippocampal-cell-numbers-and-folate-metabolism-in-a-rat-model-of-valproate-teratogenicity
#4
Alexander Semmler, Christian Frisch, Christiane Bleul, Desiree Smith, Laurent Bigler, Jean-Christophe Prost, Henk Blom, Michael Linnebank
PURPOSE: Valproate is one of the most commonly used anticonvulsive drugs. Despite its significant benefits, the teratogenicity of valproate is a relevant problem in the treatment of women of childbearing age. In addition to major congenital malformations, such as neural tube defects, reduced intelligence and attention after intrauterine valproate exposure are reported. Until now the mechanisms of teratogenicity of VPA are poorly understood and concepts how to reduce valproate teratogenicity are lacking...
January 27, 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/28212849/hydrogen-sulfide-endoplasmic-reticulum-stress-and-alcohol-mediated-neurotoxicity
#5
REVIEW
Akash K George, Jyotirmaya Behera, Kimberly E Kelly, Yuankun Zhai, Neetu Tyagi
Alcohol is one of the most socially accepted addictive drugs in modern society. Its abuse affects virtually all organ systems with the central nervous system (CNS) being particularly vulnerable to excessive alcohol exposure. Alcohol exposure also causes profound damage to both the adult and developing brain. Excessive alcohol consumption induces numerous pathophysiological stress responses, one of which is the endoplasmic reticulum (ER) stress response. Potential mechanisms that trigger the alcohol induced ER stress response are either directly or indirectly related to alcohol metabolism, which include toxic levels of acetaldehyde and homocysteine, oxidative stress and abnormal epigenetic modifications...
February 14, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28211910/link-between-plasminogen-activator-inhibitor-1-and-cardiovascular-risk-in-chronic-hepatitis-c-after-viral-clearance
#6
Ming-Ling Chang, Yu-Sheng Lin, Li-Heng Pao, Hsin-Chih Huang, Cheng-Tang Chiu
The pathophysiological implications of plasminogen activator inhibitor-1 (PAI-1) in HCV infection remain obscure. This prospective study evaluated 669 HCV patients, of whom 536 had completed a course of anti-HCV therapy and had pre-, peri- and post-therapy measurements of various profiles, including PAI-1 levels. Multivariate analysis demonstrated, before anti-HCV-therapy, platelet count and PAI-1-rs1799889 genotype were associated with PAI-1 levels. Among patients with a sustained virological response (SVR, n = 445), platelet count was associated with PAI-1 level at 24 weeks post-therapy...
February 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28210876/effect-of-hyperhomocysteinemia-on-redox-balance-and-redox-defence-enzymes-in-ischemia-reperfusion-injury-and-or-after-ischemic-preconditioning-in-rats
#7
Martin Petráš, Anna Drgová, Mária Kovalská, Zuzana Tatarková, Barbara Tóthová, Oľga Križanová, Ján Lehotský
Increased level of homocysteine (hHcy) in plasma is an accompanying phenomenon of many diseases, including a brain stroke. This study determines whether hyperhomocysteinemia (which is a risk factor of brain ischemia) itself or in combination with ischemic preconditioning affects the ischemia-induced neurodegenerative changes, generation of reactive oxygen species (ROS), lipoperoxidation, protein oxidation, and activity of antioxidant enzymes in the rat brain cortex. The hHcy was induced by subcutaneous administration of homocysteine (0...
February 16, 2017: Cellular and Molecular Neurobiology
https://www.readbyqxmd.com/read/28210839/thrombotic-microangiopathy-caused-by-methionine-synthase-deficiency-diagnosis-and-treatment-pitfalls
#8
Maria Helena Vaisbich, Andressa Braga, Maria Gabrielle, Clarissa Bueno, Flávia Piazzon, Fernando Kok
BACKGROUND: Inborn errors of cobalamin (Cbl) metabolism form a large group of rare diseases. One of these, Cbl deficiency type C (CblC), is a well-known cause of thrombotic microangiopathy (TMA), especially in infants. However, there has only been a single published case of TMA associated to Cbl deficiency type G (CblG), also known as methionine synthase deficiency (MSD). CASE DIAGNOSIS/TREATMENT: A 21-month-old boy presented with pallor and oral ulcers during episodes of upper respiratory infection (URI)...
February 16, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28208756/homocysteine-editing-thioester-chemistry-coenzyme-a-and-the-origin-of-coded-peptide-synthesis-%C3%A2
#9
REVIEW
Hieronim Jakubowski
Aminoacyl-tRNA synthetases (AARSs) have evolved "quality control" mechanisms which prevent tRNA aminoacylation with non-protein amino acids, such as homocysteine, homoserine, and ornithine, and thus their access to the Genetic Code. Of the ten AARSs that possess editing function, five edit homocysteine: Class I MetRS, ValRS, IleRS, LeuRS, and Class II LysRS. Studies of their editing function reveal that catalytic modules of these AARSs have a thiol-binding site that confers the ability to catalyze the aminoacylation of coenzyme A, pantetheine, and other thiols...
February 9, 2017: Life
https://www.readbyqxmd.com/read/28193546/contribution-of-guanine-nucleotide-exchange-factor-vav2-to-nlrp3-inflammasome-activation-in-mouse-podocytes-during-hyperhomocysteinemia
#10
Sabena M Conley, Justine M Abais-Battad, Xinxu Yuan, Qinghua Zhang, Krishna M Boini, Pin-Lan Li
NADPH oxidase (NOX)-derived reactive oxygen species (ROS) have been demonstrated to mediate the activation of NOD-like receptor protein 3 (NLRP3) inflammasomes in podocytes in response to elevated levels of homocysteine (Hcys). However, it remains unknown how NLRP3 inflammasome activation is triggered by NOX. The present study tested whether the guanine nucleotide exchange factor Vav2 mediates Rac1-mediated NOX activation in response to elevated Hcys leading to NLRP3 inflammasome activation in podocytes and consequent glomerular injury...
February 10, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28192930/mitochondria-targeted-and-intracellular-biothiol-triggered-hyperpolarized-129-xe-magnetofluorescent-biosensor
#11
Qingbin Zeng, Qianni Guo, Yaping Yuan, Yuqi Yang, Bin Zhang, Lili Ren, Xiaoxiao Zhang, Qing Luo, Maili Liu, Louis-S Bouchard, Xin Zhou
Biothiols such as gluthathione (GSH), cysteine (Cys), homocysteine (Hcy), and thioredoxin (Trx) play vital roles in cellular metabolism. Various diseases are associated with abnormal cellular biothiol levels. Thus, the intracellular detection of biothiol levels could be a useful diagnostic tool. A number of methods have been developed to detect intracellular thiols, but sensitivity and specificity problems have limited their applications. To address these limitations, we have designed a new biosensor based on hyperpolarized xenon magnetic resonance detection, which can be used to detect biothiol levels noninvasively...
February 9, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28190989/candidate-serum-metabolite-biomarkers-for-differentiating-gastroesophageal-reflux-disease-barrett-s-esophagus-and-high-grade-dysplasia-esophageal-adenocarcinoma
#12
Matthew F Buas, Haiwei Gu, Danijel Djukovic, Jiangjiang Zhu, Lynn Onstad, Brian J Reid, Daniel Raftery, Thomas L Vaughan
INTRODUCTION/OBJECTIVES: Incidence of esophageal adenocarcinoma (EA), an often fatal cancer, has increased sharply over recent decades. Several important risk factors (reflux, obesity, smoking) have been identified for EA and its precursor, Barrett's esophagus (BE), but a key challenge remains identifying individuals at highest risk, since most with reflux do not develop BE, and most with BE do not progress to cancer. Metabolomics represents an emerging approach for identifying novel biomarkers associated with cancer development...
March 2017: Metabolomics: Official Journal of the Metabolomic Society
https://www.readbyqxmd.com/read/28189056/metabolic-responses-to-intestine-regeneration-in-sea-cucumbers-apostichopus-japonicus
#13
Lina Sun, Jingchun Sun, Qinzeng Xu, Xiaoni Li, Libin Zhang, Hongsheng Yang
Sea cucumbers are excellent models for studying organ regeneration due to their striking capacity to regenerate most of their viscera after evisceration. In this study, we applied NMR-based metabolomics to determine the metabolite changes that occur during the process of intestine regeneration in sea cucumbers. Partial least-squares discriminant analysis showed that there was significant differences in metabolism between regenerative intestines at 3, 7, and 14days post evisceration (dpe) and normal intestines...
February 4, 2017: Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics
https://www.readbyqxmd.com/read/28188925/impact-of-genetic-polymorphisms-in-key-enzymes-of-homocysteine-metabolism-on-the-pathophysiology-of-sickle-cell-anemia
#14
Danilo Grünig Humberto da Silva, Edis Belini Junior, Lidiane de Souza Torres, Jessika Viviani Okumura, Willian Marcel Barberino, Renan Garcia de Oliveira, Vanessa Urbinatti Teixeira, Clarisse Lopes de Castro Lobo, Eduardo Alves de Almeida, Claudia Regina Bonini-Domingos
This work aimed at studying a possible influence of methylenetetrahydrofolate reductase (MTHFR; c. 677C>T) and cystathionine β-synthase (CBS; 844ins68) polymorphisms on overall oxidative status of sickle cell anemia (SCA) patients and on routine markers, correlating them with hydroxycarbamide (HC) treatment. We evaluated 95 unrelated and diagnosed SCA patients. All patients received a prophylactic treatment with folic acid of 5mg/day, while 41 (43.2%) of them were under hydroxycarbamide (HC) treatment (average dose: 22mg/kg/day)...
February 7, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28188730/involvement-of-histone-methylation-in-macrophage-apoptosis-and-unstable-plaque-formation-in-methionine-induced-hyperhomocysteinemic-apoe-mice
#15
Guangzhi Cong, Ru Yan, Hui Huang, Kai Wang, Ning Yan, Ping Jin, Na Zhang, Jianjun Hou, Dapeng Chen, Shaobin Jia
AIMS: Hyperhomocysteinemia (Hhcy) is an independent risk factor of atherosclerosis and promotes unstable plaque formation. Epigenetic mechanisms play an important role in the pathogenesis of atherosclerosis induced by Hhcy. However, the exact mechanism is still undefined. Lesional apoptotic cells and necrotic core formation contribute greatly to the progression of plaque. The present study sought to determine whether modification of histone methylation is involved in macrophage apoptosis and unstable plaque formation in the condition of Hhcy...
February 7, 2017: Life Sciences
https://www.readbyqxmd.com/read/28185713/effects-of-pitavastatin-on-lipid-rich-carotid-plaques-studied-using-high-resolution-magnetic-resonance-imaging
#16
Tao Feng, Xiaoxing Huang, Qundi Liang, Yun Liang, Yong Yuan, Li Feng, Wenjun Wu, Xuehong Xiao, Ying Han
PURPOSE: This study evaluates the effectiveness of pitavastatin in patients with atherosclerosis. METHODS: Sixty patients with atherosclerosis with lipid-rich carotid plaques were included and allocated into low-dose (2 mg/d) and high-dose (4 mg/d) pitavastatin groups with 48 weeks of treatment. Total cholesterol, LDL-C, HDL-C, triglycerides, apolipoprotein A1, apolipoprotein B, lipoprotein (a), and the inflammation-related factors interleukin 6, high-sensitivity C-reactive protein, and homocysteine were determined...
February 6, 2017: Clinical Therapeutics
https://www.readbyqxmd.com/read/28185308/medical-cost-savings-in-sakado-city-and-worldwide-achieved-by-preventing-disease-by-folic-acid-fortification
#17
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/28183371/regular-breakfast-consumption-is-associated-with-higher-blood-vitamin-status-in-adolescents-the-helena-healthy-lifestyle-in-europe-by-nutrition-in-adolescence-study
#18
Juan Mielgo-Ayuso, Jara Valtueña, Magdalena Cuenca-García, Fréderic Gottrand, Christina Breidenassel, Marika Ferrari, Yannis Manios, Stefaan De Henauw, Kurt Widhalm, Anthony Kafatos, Mathilde Kersting, Inge Huybrechts, Luis A Moreno, Marcela González-Gross
OBJECTIVE: The present study aimed to examine the association between different breakfast consumption patterns and vitamin intakes and blood vitamin concentrations in European adolescents. DESIGN: Breakfast consumption was assessed by a questionnaire. Vitamin intake was calculated from two 24 h recalls. Blood vitamin and total homocysteine (tHcy) concentrations were analysed from fasting blood samples. SETTING: The European Commission-funded HELENA (Healthy Lifestyle in Europe by Nutrition in Adolescence) Study...
February 10, 2017: Public Health Nutrition
https://www.readbyqxmd.com/read/28181217/hypercoagulability-and-migraine
#19
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/28179424/altered-methylation-of-specific-dna-loci-in-the-liver-of-bhmt-null-mice-results-in-repression-of-iqgap2-and-f2rl2-and-is-associated-with-development-of-preneoplastic-foci
#20
Daniel S Lupu, Luz D Orozco, Ying Wang, John M Cullen, Matteo Pellegrini, Steven H Zeisel
Folate B12-dependent remethylation of homocysteine is important, but less is understood about the importance of the alternative betaine-dependent methylation pathway-catalyzed by betaine-homocysteine methyltransferase (BHMT)-for establishing and maintaining adequate DNA methylation across the genome. We studied C57Bl/6J Bhmt (betaine-homocysteine methyltransferase)-null mice at age 4, 12, 24, and 52 wk (N = 8) and observed elevation of S-adenosylhomocysteine concentrations and development of preneoplastic foci in the liver (increased placental glutathione S-transferase and cytokeratin 8-18 activity; starting at 12 wk)...
February 8, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
keyword
keyword
107086
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"