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https://www.readbyqxmd.com/read/29332224/phosphatidylserine-exposing-blood-and-endothelial-cells-contribute-to-the-hypercoagulable-state-in-essential-thrombocythemia-patients
#1
Dongxia Tong, Muxin Yu, Li Guo, Tao Li, Jihe Li, Valerie A Novakovic, Zengxiang Dong, Ye Tian, Junjie Kou, Yayan Bi, Jinghua Wang, Jin Zhou, Jialan Shi
The mechanisms of thrombogenicity in essential thrombocythemia (ET) are complex and not well defined. Our objective was to explore whether phosphatidylserine (PS) exposure on blood cells and endothelial cells (ECs) can account for the increased thrombosis and distinct thrombotic risks among mutational subtypes in ET. Using flow cytometry and confocal microscopy, we found that the levels of PS-exposing erythrocytes, platelets, leukocytes, and serum-cultured ECs were significantly higher in each ET group [JAK2, CALR, and triple-negative (TN) (all P < 0...
January 13, 2018: Annals of Hematology
https://www.readbyqxmd.com/read/29331125/diffusion-influenced-reaction-rates-for-active-sphere-prolate-spheroid-pairs-and-janus-dimers
#2
Sergey D Traytak, Denis S Grebenkov
The purpose of this paper is twofold. First, we provide a concise introduction to the generalized method of separation of variables for solving diffusion problems in canonical domains beyond conventional arrays of spheres. Second, as an important example of its application in the theory of diffusion-influenced reactions, we present an exact solution of the axially symmetric problem on diffusive competition in an array of two active particles (including Janus dumbbells) constructed of a prolate spheroid and a sphere...
January 14, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29330459/a-novel-ultra-stable-monomeric-green-fluorescent-protein-for-direct-volumetric-imaging-of-whole-organs-using-clarity
#3
Daniel J Scott, Natalie J Gunn, Kelvin J Yong, Verena C Wimmer, Nicholas A Veldhuis, Leesa M Challis, Mouna Haidar, Steven Petrou, Ross A D Bathgate, Michael D W Griffin
Recent advances in thick tissue clearing are enabling high resolution, volumetric fluorescence imaging of complex cellular networks. Fluorescent proteins (FPs) such as GFP, however, can be inactivated by the denaturing chemicals used to remove lipids in some tissue clearing methods. Here, we solved the crystal structure of a recently engineered ultra-stable GFP (usGFP) and propose that the two stabilising mutations, Q69L and N164Y, act to improve hydrophobic packing in the core of the protein and facilitate hydrogen bonding networks at the surface, respectively...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29329614/bioassay-guided-isolation-of-novel-and-selective-urease-inhibitors-from-diospyros-lotus
#4
Abdur Rauf, Ghias Uddin, Bina S Siddiqui, Ajmal Khan, Umar Farooq, Farhan A Khan, Syed Majid Bukhari, Sher Bahadar Khan
Two new dimeric naphthoquinones, 5',8'-dihydroxy-6,6'-dimethyl-7,3'-binaphthyl-1,4,1',4'-tetraone (1; Di-naphthodiospyrol D) and 5',8'-dihydroxy-5,8-dimethoxy-6,6'-dimethyl-7,3'-binaphthyl-1,4,1',4'-tetraone (2; Di-naphthodiospyrol E), along with known naphthoquinones diospyrin (3) and 8-hydroxy diospyrin (4) were isolated from the chloroform fraction of extract of Diospyros lotus roots. Their structures were elucidated by advanced spectroscopic analyses, including HSQC, HMBC, NOESY, and J-resolved NMR experiments...
November 2017: Chinese Journal of Natural Medicines
https://www.readbyqxmd.com/read/29325504/platelet-to-lymphocyte-ratio-neutrophil-to-lymphocyte-ratio-and-platelet-indices-in-patients-with-acute-deep-vein-thrombosis
#5
Liang Ming, Zhiyun Jiang, Junfen Ma, Qian Wang, Fan Wu, Jiedan Ping
BACKGROUND: Inflammation is associated with an increased risk of thrombotic events and complete blood count (CBC) is an easily measured test. The purpose of this study was to evaluate the value of CBC relative parameters including mean platelet volume (MPV), platelet-to-lymphocyte ratio (PLR), mean platelet volume-to-lymphocyte ratio (MPVLR), and neutrophil-to-lymphocyte ratio (NLR) for patients with acute deep vein thrombosis (DVT). PATIENTS AND METHODS: A total of 115 patients with unprovoked DVT of the lower extremities and 105 controls were recruited in this study...
January 12, 2018: VASA. Zeitschrift Für Gefässkrankheiten
https://www.readbyqxmd.com/read/29325226/citrullinated-histone-h3-a-biomarker-of-neutrophil-extracellular-trap-formation-predicts-the-risk-of-venous-thromboembolism-in-cancer-patients
#6
Lisa-Marie Mauracher, Florian Posch, Kimberly Martinod, Ella Grilz, Thomas Däullary, Lena Hell, Christine Brostjan, Christoph Zielinski, Cihan Ay, Denisa D Wagner, Ingrid Pabinger, Johannes Thaler
BACKGROUND: Neutrophil extracellular traps (NETs) are decondensed chromatin fibers which might play a role in the prothrombotic state of cancer patients. OBJECTIVES: Here we investigated whether citrullinated histone H3 (H3Cit), a biomarker for NET formation, cell-free DNA (cfDNA), and nucleosomes predict venous thromboembolism (VTE) in cancer patients. PATIENTS/METHODS: Nine-hundred-forty-six patients with newly-diagnosed cancer or progression after remission were enrolled in this prospective observational cohort study...
January 11, 2018: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/29324936/the-impact-of-lung-perfusion-scintigraphy-in-the-emergency-management-of-patients-with-suspected-pulmonary-embolism
#7
Cristina Ferrari, Alessandra Cimino, Giacomo Bianco, Francesca Iuele, Alessandra Di Palo, Margherita Fanelli, Artor Niccoli-Asabella, Giuseppe Rubini
OBJECTIVE: Pulmonary Embolism (PE) is an emergency condition that requires immediate treatment. As the symptoms and the risk factors are nonspecific, PE differential diagnosis is often required. Even if angio-CT is considered the gold standard for PE diagnosis, the frequent allergic condition and/or chronic renal failure of patients make, in most cases, not possible the use of contrast enhancement in emergency with even more increasing use of Lung Perfusion Scintigraphy (LPS), as a simple and fast examination with no preparation/contraindication...
September 2017: Hellenic Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/29324486/fibrinolysis-and-antifibrinolytic-treatment-in-the-trauma-patient
#8
Lewis S Gall, Ross A Davenport
PURPOSE OF REVIEW: The role of antifibrinolytics in trauma haemorrhage and early coagulopathy remains controversial with respect to patient selection, dosage, timing of treatment, and risk of thrombotic complications. This review presents our current understanding of the mechanisms of fibrinolysis in trauma, diagnostic evaluation, and the evidence base for treatment. RECENT FINDINGS: Excessive fibrinolysis following severe injury is a major component of acute traumatic coagulopathy and contributes to the high mortality from trauma haemorrhage...
January 10, 2018: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/29323443/dicationic-e4-chains-e-p-as-sb-bi-embedded-in-the-coordination-sphere-of-transition-metals
#9
Manfred Scheer, Luis Dütsch, Martin Fleischmann, Stefan Welsch, Gabor Balaszs, Werner Kremer
A comparison of the oxidation chemistry of the complexes [{CpMo(CO)2}2(µ,η2:η2-E2)] (E = P (A), As (B), Sb (C), Bi (D)) is presented. The oxidation of A-D with [Thia]+ (= [C12H8S2]+) results in the selective formation of the dicationic E4 complexes [{CpMo(CO)2}4(µ4,η2:η2:η2:η2-E4)]2+ (E = P (1), As (2), Sb (3), Bi (4)) stabilized by four [CpMo(CO)2] fragments. The formation of the corresponding monocations [A]+, [C]+ and [D]+ could not be detected by cyclovoltammetry, EPR or NMR spectroscopy. This suggests a fast dimerization and no dissociation in solution, which is also predicted by DFT calculations...
January 11, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29323040/d-dimer-may-predict-poor-outcomes-in-patients-with-aneurysmal-subarachnoid-hemorrhage-a-retrospective-study
#10
Jun-Hui Liu, Xiang-Kui Li, Zhi-Biao Chen, Qiang Cai, Long Wang, Ying-Hu Ye, Qian-Xue Chen
Serum biomarkers may play a reliable role in predicting the outcomes of patients with aneurysmal subarachnoid hemorrhage. This study retrospectively analyzed the relationship between serum biomarkers on admission and outcomes in patients with aneurysmal subarachnoid hemorrhage. We recruited 146 patients with aneurysmal subarachnoid hemorrhage who were treated in Renmin Hospital of Wuhan University of China between 1 May 2014 and 30 March 2016. There were 57 males and 89 females included and average age of included patients was 57...
December 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/29322198/association-of-cardiovascular-biomarkers-with-incident-heart-failure-with-preserved-and-reduced-ejection-fraction
#11
Rudolf A de Boer, Matthew Nayor, Christopher R deFilippi, Danielle Enserro, Vijeta Bhambhani, Jorge R Kizer, Michael J Blaha, Frank P Brouwers, Mary Cushman, Joao A C Lima, Hossein Bahrami, Pim van der Harst, Thomas J Wang, Ron T Gansevoort, Caroline S Fox, Hanna K Gaggin, Willem J Kop, Kiang Liu, Ramachandran S Vasan, Bruce M Psaty, Douglas S Lee, Hans L Hillege, Traci M Bartz, Emelia J Benjamin, Cheeling Chan, Matthew Allison, Julius M Gardin, James L Januzzi, Sanjiv J Shah, Daniel Levy, David M Herrington, Martin G Larson, Wiek H van Gilst, John S Gottdiener, Alain G Bertoni, Jennifer E Ho
Importance: Nearly half of all patients with heart failure have preserved ejection fraction (HFpEF) as opposed to reduced ejection fraction (HFrEF), yet associations of biomarkers with future heart failure subtype are incompletely understood. Objective: To evaluate the associations of 12 cardiovascular biomarkers with incident HFpEF vs HFrEF among adults from the general population. Design, Setting, and Participants: This study included 4 longitudinal community-based cohorts: the Cardiovascular Health Study (1989-1990; 1992-1993 for supplemental African-American cohort), the Framingham Heart Study (1995-1998), the Multi-Ethnic Study of Atherosclerosis (2000-2002), and the Prevention of Renal and Vascular End-stage Disease study (1997-1998)...
January 10, 2018: JAMA Cardiology
https://www.readbyqxmd.com/read/29321409/pulmonary-embolism-caused-by-intravenous-leiomyosarcoma-of-the-lower-limb
#12
Soichiro Kado, Masahide Goto, Hidetsugu Yamao, Toru Tsukada, Masataka Sato, Yoshifumi Uekusa
Pulmonary embolism (PE) is usually caused by thrombosis or tumor. We report the long-term survival of a patient with PE due to a leiomyosarcoma in the deep vein. A 71-year-old woman complained of dyspnea and swelling of the left lower limb. Computed tomography revealed filling defects in the pulmonary arteries and deep vein. She was diagnosed with PE caused by venous thrombosis and treated with anticoagulant therapy. Her symptoms were prolonged, and D-dimer tests remained negative. Biopsy of the substance in the deep vein revealed leiomyosarcoma...
January 11, 2018: Internal Medicine
https://www.readbyqxmd.com/read/29320303/time-of-day-and-short-duration-high-intensity-exercise-influences-on-coagulation-and-fibrinolysis
#13
Emma Kate Zadow, Cecilia Marie Kitic, Sam Shi Xuan Wu, James William Fell, Murray John Adams
Exercise has been demonstrated to have considerable effects upon haemostasis, with activation dependent upon the duration and intensity of the exercise bout. In addition, markers of coagulation and fibrinolysis have been shown to possess circadian rhythms, peaking within the morning (0600-1200 h). Therefore, the time of day in which exercise is performed may influence the activation of the coagulation and fibrinolytic systems. This study aimed to examine coagulation and fibrinolytic responses to short-duration high-intensity exercise when completed at different times of the day...
January 10, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29319709/displacement-of-%C3%AE-5-cyclopentadienyl-ligands-from-half-sandwich-c-c-nhc-cyanoalkyl-nickel-ii-metallacycles-further-insight-into-the-structure-of-the-resulting-cp-free-nickelacycles-and-a-catalytic-activity-study
#14
Bernardo de P Cardoso, Jean-Marie Bernard-Schaaf, Saurabh Shahane, Luis F Veiros, Michael J Chetcuti, Vincent Ritleng
Four cationic C,C-(NHC-cyanoalkyl)-nickel(ii) metallacyclic complexes, [Ni{Me-NHC-CH2CH(CN)}(NCMe)](PF6) (2a), [Ni{Mes-NHC-CH2CH(CN)}(NCMe)](PF6) (2b), [Ni{Mes-NHC-(CH2)2CH(CN)}(NCMe)](PF6) (2c) and [Ni{DiPP-NHC-(CH2)2CH(CN)}(NCMe)](PF6) (2d), were prepared by the removal of the Cp ligand under acidic conditions at 0 °C from the corresponding half-sandwich nickelacycles [NiCp{R-NHC-(CH2)nCH(CN)}] (1a-1d; Cp = η5-C5H5; n = 1 or 2; R-NHC-(CH2)nCH(CN) = 1-R-3-[(CH2)nCH(CN)]-imidazol-2-ylidene). Full characterization of 2a-d by 1H and 13C{1H} NMR spectroscopy in CD3CN and pyridine-d5, ATR-FTIR spectroscopy, mass spectrometry, and CHN microanalyses established the presence of only one acetonitrile ligand per nickel atom in the solid state...
January 10, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29317405/coagulation-and-fibrinolysis-in-hyperparathyroidism-secondary-to-vitamin-d-deficiency
#15
Laura P B Elbers, Marije Wijnberge, Joost C M Meijers, Dennis C W Poland, Dees P M Brandjes, Eric Fliers, Victor E A Gerdes
INTRODUCTION: Abnormal coagulation tests have been observed in patients with primary hyperparathyroidism (HPT) suggesting a prothrombotic effect of parathyroid hormone (PTH). Vitamin D deficiency (VIDD) is the most frequent cause of secondary HPT. Aim of our study was to investigate the influence of HPT secondary to moderate-severe VIDD and vitamin D replacement on the coagulation and fibrinolysis system. SUBJECTS AND METHODS: Prospective cohort study of patients with vitamin D<25 nmol/l with and without HPT, and a control group of patients on vitamin D suppletion...
January 9, 2018: Endocrine Connections
https://www.readbyqxmd.com/read/29315685/hydrogen-bonding-in-the-mixed-hf-hcl-dimer-is-it-better-to-give-or-receive
#16
Sarah N Johnson, Gregory S Tschumper
The ClH⋯FH and FH⋯ClH configurations of the mixed HF/HCl dimer (where the donor⋯acceptor notation indicates the directionality of the hydrogen bond) as well as the transition state connecting the two configurations have been optimized using MP2 and CCSD(T) with correlation consistent basis sets as large as aug-cc-pV(5 + d)Z. Harmonic vibrational frequencies confirmed that both configurations correspond to minima and that the transition state has exactly one imaginary frequency. In addition, anharmonic vibrational frequencies computed with second-order vibrational perturbation theory (VPT2) are within 6 cm-1 of the available experimental values and deviate by no more than 4 cm-1 for the complexation induced HF frequency shifts...
January 9, 2018: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/29315238/on-the-tautomerism-of-n-substituted-pyrazolones-1-2-dihydro-3h-pyrazol-3-ones-versus-1h-pyrazol-3-ols
#17
Eglė Arbačiauskienė, Sonata Krikštolaitytė, Aiva Mitrulevičienė, Aurimas Bieliauskas, Vytas Martynaitis, Matthias Bechmann, Alexander Roller, Algirdas Šačkus, Wolfgang Holzer
The tautomerism of 1-phenyl-1,2-dihydro-3H-pyrazol-3-One was investigated. An X-ray crystal structure analysis exhibits dimers of 1-phenyl-1H-pyrazol-3-ol units. Comparison of NMR (nuclear magnetic resonance) spectra in liquid state (¹H, 13C, 15N) with those of "fixed" derivatives, as well as with the corresponding solid state NMR spectra reveal this compound to exist predominantly as 1H-pyrazol-3-ol molecule pairs in nonpolar solvents like CDCl₃ or C₆D₆, whereas in DMSO-d₆ the corresponding monomers are at hand...
January 9, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29315115/racial-comparison-of-d-dimer-levels-in-u-s-male-military-personnel-before-and-after-hiv-infection-and-viral-suppression
#18
Thomas A O'Bryan, Brian K Agan, Russell P Tracy, Matthew S Freiberg, Jason F Okulicz, Kaku So-Armah, Anuradha Ganesan, David Rimland, Tahaniyat Lalani, Robert G Deiss, Edmund C Tramont
BACKGROUND: D-dimer blood levels in persons with HIV infection are associated with risk of serious non-AIDS conditions and death. Black race has been correlated with higher D-dimer levels in several studies. We examined the effects of race and HIV on D-dimer over time and the impact of viral load suppression by longitudinally comparing changes in levels among healthy young adult male African Americans and Caucasians before HIV seroconversion, and before and after initiation of antiretroviral therapy (ART)...
January 8, 2018: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/29314856/prolinimines-n-amino-l-pro-methyl-ester-hydrazine-schiff-bases-from-a-fish-gastrointestinal-tract-derived-fungus-trichoderma-sp-cmb-f563
#19
Osama G Mohamed, Zeinab G Khalil, Robert J Capon
A rice cultivation of a fish gastrointestinal tract-derived fungus, Trichoderma sp. CMB-F563, yielded natural products incorporating a rare hydrazine moiety, embedded within a Schiff base. Structures inclusive of absolute configurations were assigned to prolinimines A-D (1-4) on the basis of detailed spectroscopic and C3 Marfey's analysis, as well as biosynthetic considerations, biomimetic total synthesis, and chemical transformations. Of note, monomeric 1 proved to be acid labile and, during isolation, underwent quantitative transformation to dimeric 3 and trimeric 4...
January 9, 2018: Organic Letters
https://www.readbyqxmd.com/read/29314295/structure-packing-property-correlation-of-self-sorted-vs-interdigitated-assembly-in-ttf-tcnq-based-charge-transport-materials
#20
M A Niyas, Remya Ramakrishnan, Vishnu Vijay, Mahesh Hariharan
Among the various donor-acceptor (D-A) charge transfer cocrystals investigated in the past few decades, tetrathiafulvalene-tetracyanoquinodimethane (F.Q, popularly known as TTF.TCNQ) based cocrystals have fascinated materials chemists owing to its packing and exceptional properties. Here, crystallographic information files of eighteen F.Q based cocrystals were extracted from Cambridge Structural Database and classified into Class 1 (D on D and A on A segregated stacks; F.Q, F1.Q - F6.Q and F.Q1), Class 2 (-A-D-A-D-A-D- mixed stacks; F6a...
January 3, 2018: Chemistry: a European Journal
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