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https://www.readbyqxmd.com/read/29761633/verification-of-the-qlabs-international-normalized-ratio-point-of-care-device-for-monitoring-of-patients-attending-an-anticoagulation-clinic
#1
N Mbokota, E Schapkaitz, S Louw
INTRODUCTION: In the developing world, point-of-care (POC) testing for international normalized ratio (INR) plays an important role in the monitoring of patients on long-term warfarin therapy with limited access to healthcare ensuring safe and effective anticoagulation. A newly developed POC device for INR measurement by healthcare workers is the handheld qLabs POC device® (Micropoint Biotechnologies Incorporated, Guangdong, China). METHODS: The qLabs POC device® was evaluated in 262 patients attending an anticoagulation clinic with regards to accuracy and precision of the INR results...
May 14, 2018: International Journal of Laboratory Hematology
https://www.readbyqxmd.com/read/29749429/antibacterial-and-antioxidant-activity-of-different-types-of-honey-derived-from-mount-olympus-in-greece
#2
Dimitrios Stagos, Nikolaos Soulitsiotis, Christina Tsadila, Stamatina Papaeconomou, Charalampos Arvanitis, Alexandros Ntontos, Fani Karkanta, Soultana Adamou-Androulaki, Konstantinos Petrotos, Demetrios A Spandidos, Demetrios Kouretas, Dimitris Mossialos
The aim of the present study was to examine the antioxidant and antibacterial activity of 21 types of honey derived from Mount Olympus (Mt. Olympus), a region with great plant biodiversity. The antibacterial activity was examined against the growth of Staphylococcus aureus (S. aureus) and Pseudomonas aeruginosa (P. aeruginosa) by the agar well diffusion assay and the determination of the minimum inhibitory concentration (MIC). The antioxidant activity was assessed by using the 2,2‑diphenyl‑1‑picrylhydrazyl (DPPH) and 2,2'‑azino‑bis(3‑ethylbenzothiazoline‑6‑sulphonic acid (ABTS•+) free radical scavenging assays...
May 4, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29727738/differential-sensitivity-of-von-willebrand-factor-activity-assays-to-reduced-vwf-molecular-weight-forms-a-large-international-cross-laboratory-study
#3
Emmanuel J Favaloro, Roslyn Bonar, Martine J Hollestelle, Ian Jennings, Soma Mohammed, Piet Meijer, Timothy Woods, Muriel Meiring
INTRODUCTION: von Willebrand disease (VWD), the most common inherited bleeding disorder, is due to deficiencies/defects in von Willebrand factor (VWF). Effective diagnosis requires testing for FVIII, VWF antigen and one or more VWF 'activity' assays. Classically, 'activity' is assessed using ristocetin cofactor (VWF:RCo), but collagen binding (VWF:CB) and/or other assays are used by many laboratories. This extensive international cross-laboratory study has specifically evaluated contemporary VWF activity assays for comparative sensitivity to reduction in high molecular weight (HMW) VWF, and their ability to differentiate type 1 vs 2A VWD-like samples...
April 19, 2018: Thrombosis Research
https://www.readbyqxmd.com/read/29704991/roasting-has-a-distinct-effect-on-the-antimutagenic-activity-of-coffee-varieties
#4
Alexandros Priftis, Dimitra Mitsiou, Maria Halabalaki, Georgia Ntasi, Dimitrios Stagos, Leandros A Skaltsounis, Demetrios Kouretas
Coffee is a highly consumed beverage throughout the world. Its popularity derives from its organoleptic properties that are a result of the roasting process. Roasting greatly alters a coffee bean's composition and possibly its bioactivity. In the current study, green as well as roasted extracts from both Coffea arabica (Brazil and Decaf) and Coffea canephora (Robusta) species were tested for their antimutagenic activity using the Ames test. In addition, a compositional analysis was conducted to identify the main components, mainly Chlorogenic acid isomers (CGA) and derivatives present in the extracts using UHPLC-ESI(±) and HRMS/MS methods According to the results, all extracts exhibited strong antimutagenic activity against the oxidizing factor tert-Butyl hydroperoxide, a Reactive Oxygen Species-producing compound...
May 2018: Mutation Research
https://www.readbyqxmd.com/read/29652992/-phenotypic-and-mutational-analysis-of-a-pedigree-affected-with-hereditary-coagulation-factor-%C3%A2-deficiency
#5
Mengcha Tian, Hong Xia, Zhishan Zhang, Yanhui Jin, Kankan Su, Mingshan Wang
OBJECTIVE: To explore the molecular pathogenesis for a pedigree affected with coagulation factor Ⅴ (FⅤ) deficiency. METHODS: Prothrombin time (PT), activated partial thromboplastin time (APTT), fibrinogen (FIB), coagulation factor Ⅱ activity (FⅡ: C), FⅤ activity (FⅤ: C), coagulation factor Ⅶ activity (FⅦ: C), and coagulation factor Ⅹ activity (FⅩ: C) were determined with a STAGO automatic coagulometer. FⅤ antigen (FⅤ: Ag) was detected with enzyme linked immunosorbent assay (ELISA)...
April 10, 2018: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
https://www.readbyqxmd.com/read/29623883/evaluation-of-the-coagulometer-sta-r-max-%C3%A2-stago-for-routine-coagulation-parameters
#6
Justine Brulé, Thomas Sinegre, Bruno Pereira, Marc G Berger, Anne-Françoise Serre-Sapin, Aurélien Lebreton
The STA R Max® is a fully automated multiparameter coagulometer using clotting (viscosity-based detection system), chromogenic and immunologic assays. STA R Max® is equipped with an innovative software (STA Coag Expert® ) designed to assist laboratory in accreditation. The aim of this study was to evaluate its performances for the certification according to ISO 15189 quality standard in the haemostasis unit of our university hospital. The following tests were evaluated: prothrombin time (PT), activated partial thromboplastin time (aPTT), kaolin cephalin clotting time (KCCT), fibrinogen, anti-Xa assay and D-dimers...
April 1, 2018: Annales de Biologie Clinique
https://www.readbyqxmd.com/read/29569024/soluble-fibrin-monomer-complex-and-prediction-of-cardiovascular-events-in-atrial-fibrillation-the-observational-murcia-atrial-fibrillation-project
#7
José Miguel Rivera-Caravaca, Vanessa Roldán, Marta Romera, María Asunción Esteve-Pastor, Mariano Valdés, Gregory Y H Lip, Vicente Vicente, Francisco Marín
BACKGROUND: Soluble fibrin monomer complex (SFMC) is a biomarker of fibrin formation abnormally elevated in clinical situations of hypercoagulability. OBJECTIVE: We investigated the association and predictive performance of SFMC for stroke, adverse cardiovascular events, cardiovascular mortality and all-cause mortality in a cohort of patients with atrial fibrillation (AF) receiving vitamin K antagonist (VKA) anticoagulant therapy. DESIGN: During the second semester of 2007, we included 1226 AF outpatients stable on VKAs (INR 2...
March 22, 2018: Journal of General Internal Medicine
https://www.readbyqxmd.com/read/29488668/evaluation-of-chromogenic-factor-ix-assays-by-automated-protocols
#8
G W Kershaw, K Dissanayake, V M Chen, T-L Khoo
INTRODUCTION: Chromogenic substrate assays (CSA) to measure Factor IX (FIX) have recently become commercially available. However, information on their performance characteristics and use in diagnostic haemostasis laboratories remains limited. AIM: To evaluate the Hyphen Biomed (Hyphen) and Rossix FIX CSAs on fully automated coagulation analysers and compare them to the FIX one-stage assay (OSA). This study was conducted in a tertiary referral haemostasis laboratory associated with a haemophilia treatment centre...
February 28, 2018: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/29484705/what-should-be-the-laboratory-approach-against-isolated-prolongation-of-a-activated-partial-thromboplastin-time
#9
Mesude Falay, Mehmet Senes, Dogan Yücel, Turan Turhan, Simten Dagdaş, Melike Pekin, Namik K Nazaroglu, Gülsüm Özet
BACKGROUND: This study is a retrospective evaluation of patients who were subject to mixing study in our laboratory due to prolonged APTT. The preliminary diagnoses, clinical manifestations, and results of additional ordered tests were reviewed. The study aims to investigate whether repeating APTT test with a different assay prior to performing mixed study in patients with prolonged APTT would be a better alternative algorithmic approach in order to save both time and costs. METHODS: We retrospectively evaluated 166 patients (65 females and 101 males) who were subject to mixing study due to isolated prolonged APTT...
February 27, 2018: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/29484396/effects-of-sheep-goat-whey-protein-dietary-supplementation-on-the-redox-status-of-rats
#10
Efthalia Kerasioti, Dimitrios Stagos, Aristides M Tsatsakis, Demetrios A Spandidos, Ioannis Taitzoglou, Demetrios Kouretas
The purpose of the present study is to estimate the effects of sheep/goat whey protein dietary supplementation on the redox status of blood and tissues of rats. Twelve male Wistar rats were divided into the control group (standard commercial diet) and whey group [standard commercial diet + sheep/goat whey protein (1 g kg b.w/day)] (6 rats/group). The animals were maintainted on their respective diet for 28 days. At the end of the experimental period, reduced glutathione, catalase activity, total antioxidant capacity, thiobarbituric reactive substances, protein carbonyls and the decomposition rate of H2O2 were measured in blood and tissues of rats...
April 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29475912/novel-feed-including-olive-oil-mill-wastewater-bioactive-compounds-enhanced-the-redox-status-of-lambs
#11
Sotiria Makri, Ioannis Kafantaris, Salomi Savva, Polyxeni Ntanou, Dimitrios Stagos, Ioannis Argyroulis, Basiliki Kotsampasi, Vladimiros Christodoulou, Konstantinos Gerasopoulos, Konstantinos Petrotos, Dimitrios Komiotis, Demetrios Kouretas
BACKGROUND/AIM: The aim of the present study was to investigate the antioxidant effects of a feed supplemented with polyphenolic additives from olive mill wastewater (OMW) on lambs. MATERIALS AND METHODS: Lambs received breast milk until the postnatal period, and then they were divided into two groups and received control and OMW feed for 55 days. Redox biomarkers were measured in blood and tissues at days 15, 42 and 70 after feeding. RESULTS: Feed supplemented with OMW reduced thiobarbituric acid reactive species and protein carbonyls and increased total antioxidant capacity, glutathione and catalase activity in both blood and tissues...
March 2018: In Vivo
https://www.readbyqxmd.com/read/29460346/comparison-of-the-ecarin-chromogenic-assay-and-diluted-thrombin-time-for-quantification-of-dabigatran-concentrations-comment
#12
LETTER
R Marlu, T Jouve, B Polack, P Sié, V Mémier
No abstract text is available yet for this article.
May 2018: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/29452189/roasted-and-green-coffee-extracts-show-antioxidant-and-cytotoxic-activity-in-myoblast-and-endothelial-cell-lines-in-a-cell-specific-manner
#13
Alexandros Priftis, Eleftheria-Maria Panagiotou, Konstantinos Lakis, Christina Plika, Maria Halabalaki, Georgia Ntasi, Aristidis S Veskoukis, Dimitrios Stagos, Leandros A Skaltsounis, Dimitrios Kouretas
Coffee is one of the most highly consumed beverages with potential beneficial health implications, however its molecular mechanism of action has not been completely elucidated yet. To that cause, the polyphenolic composition of different coffee extracts (from Light, Medium and Dark roasts as well as green beans) was examined by UHPLC-HRMS analysis, indicating chlorogenic acids isomers as the main constituents. In the following step, the toxicity of the extracts was tested in myoblasts and endothelial cells and differential toxicity of green and roasted samples was displayed as the myoblasts were more sensitive to green coffee extracts, in contrast to the endothelial cells...
April 2018: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29356352/viiaat-complexes-procoagulant-phospholipids-and-thrombin-generation-during-postprandial-lipemia
#14
A Silveira, A Carlo, M Adam, O McLeod, P Lundman, S Boquist, B J Woodhams, A Hamsten
INTRODUCTION: Factor VII activation occurs postprandially. A proportion of activated factor VII (VIIa) circulates in complex with antithrombin (VIIaAT). Our primary objective was to assess the effects of postprandial lipemia on circulating VIIaAT, procoagulant phospholipid (PPL) activity, and thrombin generation. METHODS: Plasma samples from postmyocardial infarction patients (n = 40) and controls (n = 39) were taken before and at 3 and 6 hours during a standardized oral fat tolerance test (OFTT)...
January 22, 2018: International Journal of Laboratory Hematology
https://www.readbyqxmd.com/read/29314632/comparison-of-five-specific-assays-for-determination-of-dabigatran-plasma-concentrations-in-patients-enrolled-in-the-start-laboratory-register
#15
M Cini, C Legnani, B Cosmi, S Testa, C Dellanoce, O Paoletti, R Marcucci, D Poli, R Paniccia, V Pengo, A Tripodi, G Palareti
INTRODUCTION: Several specific assays are commercially available to determine dabigatran anticoagulant activity. Aims of this multicenter and multiplatform study were to compare five methods for dabigatran measurement and investigate their performances in the low concentration range. METHODS: Dabigatran levels were analyzed in 295 plasma samples from patients enrolled in the START-Laboratory Register by the following methods using dedicated calibrators and controls: STA-ECA II (Diagnostica Stago), standard and low range Hemoclot Thrombin Inhibitors (Hyphen BioMed), Direct Thrombin Inhibitor Assay (Instrumentation Laboratory), Direct Thrombin Inhibitor Assay (Siemens), Technoclot DTI (Technoclone)...
April 2018: International Journal of Laboratory Hematology
https://www.readbyqxmd.com/read/29204476/data-documenting-the-performance-of-the-pt-inr-line-correction-method-for-reconciling-inr-discrepancies-between-central-laboratory-coagulation-analyzers-using-different-thromboplastins-during-the-evaluation-of-a-portable-coagulometer
#16
Wendy S Baker, Kathleen J Albright, Heidi Spratt, Megan Berman, Peggy A Mann, Jaime Unabia, John R Petersen
The data presented here was produced as part of an evaluation of the performance of the CoaguChek XS point-of-care coagulation analyzer, which is discussed in the research article "POCT PT INR - Is it adequate for Patient Care? A Comparison of the Roche Coaguchek XS vs. Stago Star vs. Siemens BCS in Patients Routinely Seen in an Anticoagulation Clinic" (Baker et al., in press) [1]. An effort to reconcile discrepancies in the patient INR result distributions from different central lab instruments (Stago Star and Siemens BCS) with the PT/INR line method is described (Poller et al...
February 2018: Data in Brief
https://www.readbyqxmd.com/read/29174054/effect-of-polyphenols-from-coffee-and-grape-on-gene-expression-in-myoblasts
#17
Alexandros Priftis, Nikolaos Goutzourelas, Maria Halabalaki, Georgia Ntasi, Dimitrios Stagos, Grigorios D Amoutzias, Leandros A Skaltsounis, Dimitrios Kouretas
Coffee and grape contain various bioactive compounds like polyphenols that may exert beneficial effects, especially antioxidant activity, on human health upon consumption. However, the molecular mechanisms through which these effects are achieved are not fully elucidated. Thus, in the present study in order to investigate these mechanisms, a whole genome expression DNA microarray analysis was carried out in myoblasts treated with polyphenols of coffee and grape pomace at concentrations that improved the redox status...
November 23, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/29168270/a-comparative-evaluation-of-a-new-fully-automated-assay-for-von-willebrand-factor-collagen-binding-activity-to-an-established-method
#18
F Stufano, L Baronciani, D Mane-Padros, G Cozzi, S Faraudo, F Peyvandi
INTRODUCTION: Laboratory diagnosis of von Willebrand disease (VWD) is made by the measurement of von Willebrand factor (VWF) protein level and its activities. Current VWF activity tests include ristocetin cofactor and collagen binding (VWF:CB) assays. AIM: We have undertaken an evaluation of a new fully automated VWF:CB assay relative to an established enzyme-linked immunosorbent assay (ELISA) method. METHODS: The two analytical systems operate with different detection principles: a chemiluminescent method performed on ACL AcuStar Analyzer (the former) and a colorimetric ELISA by Asserachrom Stago (the latter) (type III collagen from human placenta)...
January 2018: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/29145467/adenosine-lidocaine-and-mg2-alm-fluid-therapy-attenuates-systemic-inflammation-platelet-dysfunction-and-coagulopathy-after-non-compressible-truncal-hemorrhage
#19
Hayley Letson, Geoffrey Dobson
BACKGROUND: Systemic inflammation and coagulopathy are major drivers of injury progression following hemorrhagic trauma. Our aim was to examine the effect of small-volume 3% NaCl adenosine, lidocaine and Mg2+ (ALM) bolus and 0.9% NaCl/ALM 'drip' on inflammation and coagulation in a rat model of hemorrhagic shock. METHODS: Sprague-Dawley rats (429±4 g) were randomly assigned to: 1) shams, 2) no-treatment, 3) saline-controls, 4) ALM-therapy, and 5) Hextend®. Hemorrhage was induced in anesthetized-ventilated animals by liver resection (60% left lateral lobe and 50% medial lobe)...
2017: PloS One
https://www.readbyqxmd.com/read/29138680/enhancement-of-antioxidant-mechanisms-and-reduction-of-oxidative-stress-in-chickens-after-the-administration-of-drinking-water-enriched-with-polyphenolic-powder-from-olive-mill-waste-waters
#20
Aliki Papadopoulou, Konstantinos Petrotos, Dimitrios Stagos, Konstantinos Gerasopoulos, Antonios Maimaris, Haralampos Makris, Ioannis Kafantaris, Sotiria Makri, Efthalia Kerasioti, Maria Halabalaki, Vincent Brieudes, Georgia Ntasi, Stylianos Kokkas, Pavlos Tzimas, Panagiotis Goulas, Alexander M Zakharenko, Kirill S Golokhvast, Aristidis Tsatsakis, Demetrios Kouretas
The aim of the study was to examine the effects of a polyphenolic powder from olive mill wastewater (OMWW) administered through drinking water, on chickens' redox status. Thus, 75 chickens were divided into three groups. Group A was given just drinking water, while groups B and C were given drinking water containing 20 and 50  μ g/ml of polyphenols, respectively, for 45 days. The antioxidant effects of the polyphenolic powder were assessed by measuring oxidative stress biomarkers in blood after 25 and 45 days of treatment...
2017: Oxidative Medicine and Cellular Longevity
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