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https://www.readbyqxmd.com/read/27921101/the-effect-of-common-anticoagulants-in-detection-and-quantification-of-malaria-parasitemia-in-human-red-blood-cells-by-atr-ftir-spectroscopy
#1
Miguela Martin, David Perez-Guaita, Dean W Andrew, Jack S Richards, Bayden R Wood, Philip Heraud
Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR-FTIR) has the potential to become a new diagnostic tool for malaria and other diseases. For point-of-care testing, the use of ATR-FTIR in malaria diagnosis enables the analysis of blood in the aqueous state, which represents an enormous advantage by minimising the sample preparation by removing the need for cell fixation. Here we report the quantification of malaria parasitemia in human RBCs in their normal physiological aqueous state...
December 6, 2016: Analyst
https://www.readbyqxmd.com/read/27918018/a-planar-model-of-the-vessel-wall-from-cellularized-collagen-scaffolds-focus-on-cell-matrix-interactions-in-mono-bi-and-tri-culture-models
#2
Caroline Loy, Sébastien Meghezi, Lucie Lévesque, Daniele Pezzoli, Heena Kumra, Dieter Reinhardt, Jayachandran N Kizhakkedathu, Diego Mantovani
The acquisition of new thorough knowledge on the interactions existing between vascular cells would represent a step forward in the engineering of vascular tissues. In this light, herein we designed a physiological-like tri-culture in vitro vascular wall model using a planar cellularized collagen gel as the scaffold. The model can be obtained in 24 h and features multi-layered hierarchical organization composed of a fibroblast-containing adventitia-like layer, a media-like layer populated by smooth muscle cells and an intima-like endothelial cell monolayer...
December 5, 2016: Biomaterials Science
https://www.readbyqxmd.com/read/27917711/theories-about-blood-coagulation-in-the-writings-of-ancient-greek-medico-philosophers
#3
Gregory Tsoucalas, Marianna Karamanou, Theodoros G Papaioannou, Markos Sgantzos
Anaxagoras and Empedocles both established during the Presocratic era a pioneering theory for the creation of everything in the universe. Macrocosmos' impact through the "Four Elements Theory" explained the conglomeration of the blood inside the vessels. Hippocrates, who instituted the "Four Humours theory", clearly understood blood's coagulation and introduced the term "thrombus". Plato, Aristotle and Galen, all engaged with the clotting phenomenon trying to interpret it. After eons of inquiry, it was the innovative thinking of the ancient Greek medico philosophers that set the scientific bases towards the understanding of a process that had been analyzing until our era...
December 5, 2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27916047/-the-impact-of-different-doses-of-atorvastatin-on-plasma-endothelin-and-platelet-function-in-acute-st-segment-elevation-myocardial-infarction-after-emergency-percutaneous-coronary-intervention
#4
X R Xu, K B Li, P Wang, L Xu, Y Liu, Z S Yang, X C Yang
Objective: To investigate the effects of different doses of atorvastatin on plasma endothelin and platelet function in acute ST-segment elevation myocardial infarction (STEMI) patients after emergency percutaneous coronary intervention(PCI). Methods: A total of 120 patients with acute STEMI treated with emergency PCI were enrolled and randomly divided into 20 mg of atorvastatin treatment group (standard group, n=60), and 40 mg of atorvastatin treatment group (intensive group, n=60). The blood C reactive protein (CRP), blood lipid profiles, plasma endothelin (ET) were measured before atorvastatin treatment and after 7 days of treatment, respectively...
December 1, 2016: Zhonghua Nei Ke za Zhi [Chinese Journal of Internal Medicine]
https://www.readbyqxmd.com/read/27913070/basagran-%C3%A2-induces-developmental-malformations-and-changes-the-bacterial-community-of-zebrafish-embryos
#5
Jacinta M M Oliveira, Victor Galhano, Isabel Henriques, Amadeu M V M Soares, Susana Loureiro
This study aimed to assess the effects of Basagran(®) on zebrafish (Danio rerio) embryos. The embryos were exposed to Basagran(®) at concentrations ranging from 120.0 to 480.6 mg/L, and the effects on embryo development (up to 96 h) and bacterial communities of 96 h-larvae were assessed. The embryo development response was time-dependent and concentration-dependent (106.35 < EC50 < 421.58 mg/L). The sensitivity of embryo-related endpoints decreased as follows: blood clotting in the head and/or around the yolk sac > delay or anomaly in yolk sac absorption > change in swimming equilibrium > development of pericardial and/or yolk sac oedema > scoliosis...
November 29, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27909620/is-normal-saline-the-best-irrigation-fluid-to-be-used-during-percutaneous-nephrolithotomy-in-renal-failure-patient-a-prospective-randomized-controlled-trial
#6
Bimalesh Purkait, Manoj Kumar, Ankur Bansal, Ashok Kumar Sokhal, Satya Narayan Sankhwar, Kawaljit Singh
OBJECTIVE: Endoscopic procedures like percutaneous nephrolithotomy (PCNL) needs continuous irrigation for better vision and to wash away stone fragments and blood clots. Systemic absorption of irrigation fluids may lead to fluid overload and electrolyte disequilibrium. Renal failure patients are more prone to these electrolyte disturbances. We have evaluated the outcomes of normal saline as irrigation solution to be used in renal failure patient in comparison to distilled water. METHODS: Seventy-six patients with renal calculi were enrolled in this study between September, 2014, and December, 2015...
December 2016: Turkish Journal of Urology
https://www.readbyqxmd.com/read/27909513/assessment-of-sinoatrial-node-function-in-patients-with-persistent-and-long-standing-persistent-forms-of-atrial-fibrillation-after-maze-iii-procedure-combined-with-mitral-valve-operation
#7
Kulikov Aleksei A, Bokeria Leo A
RESEARCH OBJECTIVE: Assessment of sinoatrial node function after Maze III procedure combined with a mitral valve operation. METHODS: 100 patients were included in the research with persistent and long-standing persistent forms of atrial fibrillation (AF) and need of operative treatment concerning valve disease. The following preoperative preparation methods were executed to all patients: Electrocardiogram in 12 standard assignments;Two-dimensional echocardiographic with assessment of systolic and diastolic functions of the left ventricle, size of the left atrium and grade of valve disease;Transesophageal echocardiography for exclusion of blood clots in the left atrium and left atrial appendage;Coronary angiography for exclusion of coronary heart disease;Computer tomography for examination of cardiac chambers and anatomic characteristics of pulmonary veins...
June 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/27908894/contraction-of-blood-clots-is-impaired-in-acute-ischemic-stroke
#8
Valerie Tutwiler, Alina D Peshkova, Izabella A Andrianova, Dina R Khasanova, John W Weisel, Rustem I Litvinov
OBJECTIVE: Obstructive thrombi or thrombotic emboli are the pathogenic basis of ischemic stroke. In vitro blood clots and in vivo thrombi can undergo platelet-driven contraction (retraction), resulting in volume shrinkage. Clot contraction can potentially reduce vessel occlusion and improve blood flow past emboli or thrombi. The aim of this work was to examine a potential pathogenic role of clot contraction in ischemic stroke. APPROACH AND RESULTS: We used a novel automated method that enabled us to quantify time of initiation and extent and rate of clot contraction in vitro...
December 1, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/27908798/platelets-are-responsible-for-the-accumulation-of-%C3%AE-amyloid-in-blood-clots-inside-and-around-blood-vessels-in-mouse-brain-after-thrombosis
#9
Lilia Y Kucheryavykh, Josué Dávila-Rodríguez, David E Rivera-Aponte, Lidia V Zueva, A Valance Washington, Priscilla Sanabria, Mikhail Y Inyushin
INTRODUCTION: Platelets contain beta-amyloid precursor protein (APP) as well as Aβ peptide (Aβ) that can be released upon activation. During thrombosis, platelets are concentrated in clots and activated. METHODS: We used in vivo fluorescent analysis and electron microscopy in mice to determine to what degree platelets are concentrated in clots. We used immunostaining to visualize Aβ after photothrombosis in mouse brains. RESULTS: Both in vivo results and electron microscopy revealed that platelets were 300-500 times more concentrated in clots than in non-clotted blood...
November 28, 2016: Brain Research Bulletin
https://www.readbyqxmd.com/read/27908703/simultaneous-effects-of-coagulation-and-variable-magnetic-field-on-peristaltically-induced-motion-of-jeffrey-nanofluid-containing-gyrotactic-microorganism
#10
M M Bhatti, A Zeeshan, R Ellahi
In this article, simultaneous effects of coagulation (blood clot) and variable magnetic field on peristaltically induced motion of non-Newtonian Jeffrey nanofluid containing gyrotactic microorganism through an annulus have been studied. The effects of an endoscope also taken into consideration in our study as a special case. The governing flow problem is simplified by taking the approximation of long wavelength and creeping flow regime. The resulting highly coupled differential equations are solved analytically with the help of perturbation method and series solution have been presented up to second order approximation...
November 28, 2016: Microvascular Research
https://www.readbyqxmd.com/read/27907957/surgical-strategies-for-spontaneous-intracerebral-hemorrhage
#11
Wendy Ziai, J Ricardo Carhuapoma, Paul Nyquist, Daniel F Hanley
In recent decades, the medical and surgical treatment of intracerebral hemorrhage (ICH) have become the focus of a number of scientific investigations. This effort has been led by an international group of neurologists and neurosurgeons with the goal of studying functional recovery and developing new medical and surgical treatments to facilitate improved clinical outcomes. Currently, two of the most pressing ICH investigational goals are (1) early blood pressure control, and (2) safe hematoma volume reduction...
December 2016: Seminars in Neurology
https://www.readbyqxmd.com/read/27906117/carotid-artery-stenting-versus-no-stenting-assisting-thrombectomy-for-acute-ischaemic-stroke-protocol-for-a-systematic-review-of-randomised-clinical-trials-with-meta-analyses-and-trial-sequential-analyses
#12
Henrik Steglich-Arnholm, Markus Holtmannspötter, Christian Gluud, Derk Wolfgang Krieger
BACKGROUND: In patients with intracranial large vessel arterial occlusion, ipsilateral extracranial carotid artery occlusions or near-occlusions pose a significant hurdle in endovascular management of acute ischaemic stroke. Stenting of the carotid lesion may be beneficial in this situation to provide a stable access for introducing catheters through the carotid lesion into the intracranial vasculature and the target occlusion. Furthermore, carotid stenting may ensure ample blood flow for wash-out of clot material and reperfusion of the ischaemic penumbral tissue...
December 1, 2016: Systematic Reviews
https://www.readbyqxmd.com/read/27906086/massive-adrenal-vein-aneurysm-mimicking-an-adrenal-tumor-in-a-patient-with-hemophilia-a-a-case-report-and-review-of-the-literature
#13
Richard Sleightholm, Steven Wahlmeier, Jeffrey S Carson, Andjela Drincic, Audrey Lazenby, Jason M Foster
BACKGROUND: Visceral venous aneurysms are exceedingly rare, and until now, there have been no reports of this phenomenon in the adrenal vasculature. This report details the first adrenal venous aneurysm reported in the literature. The aneurysm presented as an 18-cm mass that was initially suspected to be a hematoma or tumor on the basis of the complex medical history of the patient, which included hemophilia A and testicular cancer. After surgical excision, pathologic examination confirmed this mass to be a 15...
December 1, 2016: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/27904902/a-novel-hirudin-derivative-inhibiting-thrombin-without-bleeding-for-subcutaneous-injection
#14
Bing Zhao, Yanling Zhang, Yinong Huang, Jinchao Yu, Yaran Li, Qi Wang, Yixin Ma, Hou-Yan Song, Min Yu, Wei Mo
Currently, anticoagulants would be used to prevent thrombosis. Thrombin is an effector enzyme for haemostasis and thrombosis. We designed a direct thrombin inhibitor peptide (DTIP) using molecular simulation and homology modelling and demonstrated that the C-terminus of DTIP interacts with exosite I, and N-terminus with the activity site of thrombin, respectively. DTIP interfered with thrombin-mediated coagulation in human, rat and mouse plasma (n=10 per group) and blocked clotting in human whole blood in vitro...
December 1, 2016: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/27902939/factor-xiii-deficiency-enhances-thrombin-generation-due-to-impaired-fibrin-polymerization-an-effect-corrected-by-factor-xiii-replacement
#15
Hanna H Pitkänen, Annukka Jouppila, Marja Lemponen, Minna Ilmakunnas, Jouni Ahonen, Riitta Lassila
INTRODUCTION: Factor XIII (FXIII) cross-links fibrin, completing blood coagulation. Congenital FXIII deficiency is managed with plasma-derived FXIII (pdFXIII) or recombinant FXIII (rFXIII) concentrates. AIM: As the mechanisms protecting patients with low FXIII levels (<5IU/dL) from spontaneous bleeds remain unknown we assessed the interplay between thrombin generation (TG), fibrin formation and clot kinetics before and after FXIII administration in three patients with FXIII deficiency...
November 16, 2016: Thrombosis Research
https://www.readbyqxmd.com/read/27901294/performance-of-functional-fibrinogen-thromboelastography-in-children-undergoing-congenital-heart-surgery
#16
Nischal K Gautam, Chunyan Cai, Olga Pawelek, Muhammad B Rafique, Davide Cattano, Evan G Pivalizza
BACKGROUND: Functional Fibrinogen assay of the Thromboelastography (FFTEG), a whole blood viscoelastic hemostatic assay, has been used to estimate fibrinogen levels in adult patients undergoing major surgery but its performance in pediatric patients undergoing cardiac surgery requires evaluation. In this study, we evaluate the correlation between FFTEG parameters and standard laboratory tests for fibrinogen and platelet counts before and after cardiopulmonary bypass in children undergoing repair for congenital heart disease...
November 30, 2016: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/27900155/normal-platelet-function-in-platelet-concentrates-requires-non-platelet-cells-a-comparative-in-vitro-evaluation-of-leucocyte-rich-type-1a-and-leucocyte-poor-type-3b-platelet-concentrates
#17
William R Parrish, Breana Roides, Julia Hwang, Michael Mafilios, Brooks Story, Samir Bhattacharyya
BACKGROUND: Therapeutic success of platelet-rich plasma (PRP) may vary based on the composition and preparation method. The objective of this study was to evaluate the cellular components of platelet concentrates produced by a leucocyte-rich (LR-PRP) and a leucocyte-poor PRP systems (LP-PRP). METHODS: Parameters evaluated included platelet recovery, platelet concentration, red blood cell (RBC) and white blood cell (WBC) composition, platelet growth factor release and stimulation of human tendon cell proliferation in vitro...
2016: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/27899993/predictive-value-of-microparticle-associated-tissue-factor-activity-for-permeability-glycoprotein-mediated-multidrug-resistance-in-cancer
#18
Antonio Angelini, Sebastiano Miscia, Maria Antonietta Centurione, Roberta Di Pietro, Lucia Centurione
Multidrug resistance (MDR) protein 1, which is also known as permeability glycoprotein (Pgp), and tissue factor (TF) are recurrently overexpressed on the surface of cancer cells, likely in response to stimuli such as chemotherapy. Microparticles (MPs) released from cancer cells into the bloodstream express tumour markers on their surface that may be useful as predictive biomarkers for evaluating disease progression. The present study measured the level of TF/factor VII (FVII)-dependent coagulation of MPs isolated from the plasma of cancer patients with various tumours, who were undergoing chemotherapy...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27899173/procoagulant-role-of-microparticles-in-routine-storage-of-packed-red-blood-cells-potential-risk-for-prothrombotic-post-transfusion-complications
#19
Htet Htet Aung, John-Paul Tung, Melinda M Dean, Robert L Flower, Natalie M Pecheniuk
During routine storage, packed red blood cells (PRBC) undergo biochemical and morphological changes including loss of red blood cell (RBC) membrane asymmetry and release of microparticles (MPs) bearing phosphatidylserine (PS), a procoagulant phospholipid. This study investigated the association between PRBC storage duration, MP profile and procoagulant activity. Leukodepleted PRBC-supernatant (PRBC-SN; n=13) was prepared at weekly intervals throughout storage. Phospholipid-dependent procoagulant activity, assessed using a factor X-activated clotting time (XACT) assay, decreased throughout storage (p<0...
November 26, 2016: Pathology
https://www.readbyqxmd.com/read/27896500/differences-in-the-adsorption-of-nafamostat-mesilate-between-polyester-polymer-alloy-and-polysulfone-membranes
#20
Sawako Goto, Susumu Ookawara, Akihiko Saito
We previously experienced severe clot formation in a polyester-polymer alloy (PEPA) dialyzer and hemodialysis (HD) circuit with nafamostat mesilate (NM) as an anticoagulant. The possibility of NM adsorption to the PEPA membrane was taken into consideration, but there was not enough information. In the present study, we evaluated differences in the adsorption of NM between a PEPA membrane (FDX-120 GW, Nikkiso, Tokyo, Japan) and two different polysulfone membranes (FX-140, Fresenius Medical Care, Tokyo, Japan; NV-15U, Toray Medical, Tokyo, Japan)...
November 28, 2016: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
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