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https://www.readbyqxmd.com/read/28107228/contribution-of-oxidative-stress-to-non-aids-events-in-hiv-infected-patients
#1
Mar Masiá, Sergio Padilla, Marta Fernández, Xavier Barber, Santiago Moreno, José Antonio Iribarren, Joaquín Portilla, Alejandro Peña, Francesc Vidal, Félix Gutiérrez
OBJECTIVE: Recognition of potentially modifiable mechanisms implicated in the pathogenesis of non-AIDS events (NAEs) might help improve outcomes of HIV-infected individuals. HIV infection has been associated with increased oxidative stress. We assessed the association between F2-isoprostanes and serious NAEs, and whether they improve the predictive performance of inflammation and coagulation biomarkers. METHODS: Prospective multicenter cohort. Individuals who had an incident serious NAE and two sex and age matched participants with no events were selected...
January 18, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28106338/the-original-and-simplified-wells-rules-and-age-adjusted-d-dimer-testing-to-rule-out-pulmonary-embolism-an-individual-patient-data-meta-analysis
#2
Nick van Es, Noémie Kraaijpoel, Frederikus A Klok, Menno V Huisman, Paul L Den Exter, Inge C M Mos, Javier Galipienzo, Harry R Büller, Patrick M Bossuyt
BACKGROUND: The Wells score and D-dimer testing can safely rule out pulmonary embolism (PE). A simplification of the Wells score has been proposed to improve clinical applicability, but evidence on its performance is scarce. OBJECTIVES: To compare the performance of the original and simplified Wells scores alone and in combination with age-adjusted D-dimer testing. METHODS: Individual patient data from 7,268 patients with suspected PE enrolled in 6 management studies were used to evaluate the discriminatory performance of the original and simplified Wells scores...
January 20, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28103503/sedative-hypnotic-like-effect-and-molecular-docking-of-di-naphthodiospyrol-from-diospyros-lotus-in-an-animal-model
#3
Abdur Rauf, Taibi Ben Hadda, Ghias Uddin, José P Cerón-Carrasco, Jorge Peña-García, Horacio Pérez-Sánchez, Haroon Khan, Saud Bawazeer, Seema Patel, Mohammad S Mubarak, Tareq Abu-Izneid, Yahia Nasser Mabkhot
BACKGROUND: Diospyros lotus Linn commonly known as date-plum, or Caucasian persimmon has multiple uses in folk medicine. Various parts of this plant is used for alleviating lumbago, dysponea, hemorrhage, insomnia, and hiccup. The plant extracts possess a variety of biological activities, such as anti-inflammatory, sedative, febrifuge, anti-microbial, vermifuge, and anti-hypertensive. AIM/HYPOTHESIS: The aim of the present work is to investigate the sedative-hypnotic effect of a rare dimeric napthoquione 1 obtained from the chloroform soluble fraction of D...
January 16, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28102773/the-optimal-duration-of-anticoagulant-therapy-after-unprovoked-venous-thromboembolism-still-a-challenging-issue
#4
Giovanna Elmi, Giuseppe Di Pasquale, Raffaele Pesavento
As about 50 % of patients with unprovoked venous thromboembolism (VTE) will develop new episodes after discontinuing therapy, indefinite treatment is suggested in patients with low or moderate bleeding risk. Baseline and post-baseline factors can help clinicians to identify patients at high risk of recurrence, who require extended treatment. Residual vein obstruction and D-dimer assay have been shown to be suitable methods for assessing the risk of VTE recurrences after a first unprovoked VTE. In treatment for VTE the use of direct oral anticoagulants (DOAC) is growing instead of the standard adjusted dose of vitamin K antagonists...
January 19, 2017: VASA. Zeitschrift Für Gefässkrankheiten
https://www.readbyqxmd.com/read/28102622/successful-surgical-management-of-congenital-kasabach-merritt-syndrome
#5
Sébastien Pascal, Quentin Bettex, Nicolas Andre, Philippe Petit, Dominique Casanova, Nathalie Degardin
Since the first description of Kasabach-Merritt syndrome (KMS) in 1940, many treatments have been proposed combining pharmacologic and non-pharmacologic approaches, which can be effective on the pathology but can have adverse and unpredictable side-effects with long-term use. Herein we describe the solely surgical treatment of Kasabach-Merritt syndrome in a neonate with a severe and rapidly progressive thrombocytopenia. The patient's condition normalized at 7 days postoperatively, with rapid increase in platelet count and normalization of d-dimer concentration...
January 2017: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/28099190/coagulation-imbalance-and-neurocognitive-functioning-in-older-hiv-adults-on-suppressive-antiretroviral-therapy
#6
Jessica L Montoya, Jennifer Iudicello, Hannah A Oppenheim, Pariya L Fazeli, Michael Potter, Qing Ma, Paul J Mills, Ronald J Ellis, Igor Grant, Scott L Letendre, David J Moore
OBJECTIVES: To compare plasma biomarkers of coagulation between HIV-infected individuals and HIV-uninfected controls and to assess the impact of disturbances in coagulation on neurocognitive functioning in HIV. DESIGN: Cross-sectional study of 66 antiretroviral therapy-treated virally suppressed HIV-infected and 34 HIV-uninfected older (≥50 years of age) adults. METHODS: Participants completed standardized neurobehavioral and neuromedical assessments...
January 17, 2017: AIDS
https://www.readbyqxmd.com/read/28098983/redox-initiated-reactivity-of-dinuclear-%C3%AE-diketiminatoniobium-imido-complexes
#7
Benjamin M Kriegel, Lara C E Naested, Grégory Nocton, K V Lakshmi, Trevor D Lohrey, Robert G Bergman, John Arnold
High-valent dichloride and dimethylniobium complexes 1 and 2 bearing tert-butylimido and N,N'-bis(2,4,6-trimethylphenyl)-β-diketiminate (BDI(Ar)) ligands were prepared. The dimethyl complex reacted with dihydrogen to release methane and generate the hydride-bridged diniobium(IV) complex 3 in high yield. One-electron oxidation of 3 with silver salts resulted in the release of dihydrogen and conversion to a mixed-valent Nb(III)-Nb(IV) complex, 4, that displayed a frozen-solution X-band electron paramagnetic resonance signal consistent with a slight dissymmetry between the two Nb centers...
January 18, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28094942/simulation-of-dbs-dbs-cooh-and-dbs-conhnh2-as-hydrogelators
#8
Dafna Knani, David Alperstein
The organic gelator 1,3(R):2,4(S)-dibenzylidene-D-sorbitol (DBS) self-organizes to form a 3-D network at relatively low concentrations in a variety of nonpolar organic solvents and polymer melt. DBS could be transformed into a hydrogelator by introduction of hydrophilic groups, which facilitate its self-assembly in aqueous medium. In this work, we have investigated the hydrogelators DBS-COOH and DBS-CONHNH2 and the organogelator DBS by molecular modeling. We have used quantum mechanics (QM) to elucidate the preferred geometry of one molecule and a dimer of each of the gelators, and molecular dynamics (MD) to simulate the pure gelators and their mixtures with water...
January 17, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28092405/thrombin-contributes-to-protective-immunity-in-pneumonia-derived-sepsis-via-fibrin-polymerization-and-platelet-neutrophil-interactions
#9
Theodora A M Claushuis, Sacha F de Stoppelaar, Ingrid Stroo, Joris J T H Roelofs, Roelof Ottenhoff, Tom van der Poll, Cornelis van 't Veer
BACKGROUND: Innate immunity and coagulation are closely linked during sepsis. Their interaction can be detrimental for outcome due to microvascular failure but can also enhance host defense. The role of thrombin herein has not been fully elucidated. OBJECTIVE: We aimed to investigate the contribution of thrombin to the host response during pneumonia derived sepsis. METHODS: Mice treated with the specific thrombin inhibitor Dabigatran or control chow were infected with the common human sepsis pathogen Klebsiella (K...
January 16, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28092137/isolation-and-characterization-of-rhizobium-sp-strain-ys-1r-that-degrades-lignin-in-plant-biomass
#10
Colin A Jackson, Matthew B Couger, Madhu Prabhakaran, Karthikeyan D Ramachandriya, Patricia Canaan, Babu Z Fathepure
AIMS: The aim of this work was to isolate novel lignin degrading organisms. METHODS AND RESULTS: Several pure cultures of bacteria that degrade lignin were isolated from bacterial consortia developed from decaying biomass. Among the isolates, Rhizobium sp. strain YS-1r (closest relative of Rhizobium petrolearium Strain SL-1) was explored for its lignin degrading ability. Microcosm studies showed that strain YS-1r was able to degrade a variety of lignin monomers, dimers, and also native lignin in switchgrass and alfalfa...
January 16, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28090594/effects-of-tranexamic-acid-on-platelet-function-and-thrombin-generation-etaplat-woman-trial-sub-study
#11
Kastriot Dallaku, Haleema Shakur, Ian Roberts, Phil Edwards, Danielle Beaumont, Maria Delius, Braun Siegmund, Orion Gliozheni, Ilir Tasha, Saimir Cenameri, Ulrich Mansmann
Background. Postpartum haemorrhage (PPH) is a leading cause of maternal death. Tranexamic acid (TXA) has the potential to reduce bleeding and a large randomized placebo controlled trial of its effect in women with PPH (The WOMAN trial) is underway. TXA might also affect coagulation factors and platelets.  Objectives. To examine the effect of TXA on thrombin generation, platelet function, fibrinogen, D-dimer and coagulation factors in women with PPH.  Methods. We will conduct a sub-study within the WOMAN trial...
December 15, 2016: Wellcome Open Res
https://www.readbyqxmd.com/read/28089597/magnesium-and-calcium-ions-differentially-affect-human-serine-racemase-activity-and-modulate-its-quaternary-equilibrium-toward-a-tetrameric-form
#12
Stefano Bruno, Marilena Margiotta, Francesco Marchesani, Gianluca Paredi, Valentina Orlandi, Serena Faggiano, Luca Ronda, Barbara Campanini, Andrea Mozzarelli
Serine racemase is the pyridoxal 5'-phosphate dependent enzyme that catalyzes both production and catabolism of d-serine, a co-agonist of the NMDA glutamate receptors. Mg(2+), or, alternatively, Ca(2+), activate human serine racemase by binding both at a specific site and - as ATP-metal complexes - at a distinct ATP binding site. We show that Mg(2+) and Ca(2+) bind at the metal binding site with a 4.5-fold difference in affinity, producing a similar thermal stabilization and partially shifting the dimer-tetramer equilibrium in favour of the latter...
January 9, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28089448/structural-basis-for-the-interaction-of-a-human-small-heat-shock-protein-with-the-14-3-3-universal-signaling-regulator
#13
Nikolai N Sluchanko, Steven Beelen, Alexandra A Kulikova, Stephen D Weeks, Alfred A Antson, Nikolai B Gusev, Sergei V Strelkov
By interacting with hundreds of protein partners, 14-3-3 proteins coordinate vital cellular processes. Phosphorylation of the small heat shock protein, HSPB6, within its intrinsically disordered N-terminal domain activates its interaction with 14-3-3, ultimately triggering smooth muscle relaxation. After analyzing the binding of an HSPB6-derived phosphopeptide to 14-3-3 using isothermal calorimetry and X-ray crystallography, we have determined the crystal structure of the complete assembly consisting of the 14-3-3 dimer and full-length HSPB6 dimer and further characterized this complex in solution using fluorescence spectroscopy, small-angle X-ray scattering, and limited proteolysis...
December 30, 2016: Structure
https://www.readbyqxmd.com/read/28087810/akt1-lkb1-and-yap1-revealed-as-myc-interactors-with-nanoluc-based-protein-fragment-complementation-assay
#14
Xiu-Lei Mo, Qi Qi, Andrei A Ivanov, Qiankun Niu, Yin Luo, Jonathan Havel, Russell Goetze, Sydney Bell, Carlos S Moreno, Lee A D Cooper, Margaret A Johns, Fadlo R Khuri, Yuhong Du, Haian Fu
The c-Myc (MYC) transcription factor is a major cancer driver and a well-validated therapeutic target. However, directly targeting MYC has been challenging. Thus, identifying proteins that interact with and regulate MYC may provide alternative strategies to inhibit its oncogenic activity. Here we report the development of a NanoLuc®-based protein-fragment complementation assay (NanoPCA) and mapping of the MYC protein interaction hub in live mammalian cells. The NanoPCA system was configured to enable detection of protein-protein interactions (PPI) at the endogenous level, as shown with PRAS40 dimerization, and detection of weak interactions, such as PINCH1-NCK2...
January 13, 2017: Molecular Pharmacology
https://www.readbyqxmd.com/read/28086824/d-dimer-is-an-essential-accompaniment-of-circulating-tumor-cells-in-gastric-cancer
#15
Dongmei Diao, Yao Cheng, Yongchun Song, Hao Zhang, Zhangjian Zhou, Chengxue Dang
BACKGROUND: Fibrinogen (FIB) is an important source of fibrin, which plays a crucial role in circulating tumor cells (CTCs) extravasation and distant metastasis development. We hypothesize it's stable final product, plasma D-dimer, may be associated with CTCs appearance and can reflect the metastatic phenotype in cancer patients. METHODS: We first verified our hypothesis in different murine gastric cancer metastasis models in vivo, plasma D-dimer and fibrinogen as well as its degradation products were directly examined in three metastasis immune-deficient mouse models and in controls...
January 13, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28081568/non-lethal-endotoxin-injection-a-rat-model-of-hypercoagulability
#16
Marjory B Brooks, James R Turk, Abraham Guerrero, Padma K Narayanan, John P Nolan, Elizabeth G Besteman, Dennis W Wilson, Roberta A Thomas, Cindy E Fishman, Karol L Thompson, Heidrun Ellinger-Ziegelbauer, Jennifer B Pierson, April Paulman, Alan Y Chiang, Albert E Schultze
Systemic inflammation co-activates coagulation, which unchecked culminates in a lethal syndrome of multi-organ microvascular thrombosis known as disseminated intravascular coagulation (DIC). We studied an endotoxin-induced inflammatory state in rats to identify biomarkers of hemostatic imbalance favoring hypercoagulability. Intraperitoneal injection of LPS at 15 mg/kg body weight resulted in peripheral leukopenia and widespread neutrophilic sequestration characteristic of an acute systemic inflammatory response...
2017: PloS One
https://www.readbyqxmd.com/read/28081351/the-effect-of-methylprednisolone-treatment-on-fibrinolysis-thecoagulation-system-and-blood-loss-in-cardiac-surgery
#17
Leila Ebrahimi, Maryam Kheirandish, Mahnoosh Foroughi
BACKGROUND/AIM: The purpose of this study was to examine steroid pretreatment in order to decrease postoperative coagulopathy disorders and bleeding. MATERIALS AND METHODS: In this randomized double-blinded study, the efficacy of low versus high doses of methylprednisolone on the coagulation system and postoperative bleeding was compared in patients who were undergoing cardiac surgery with cardiopulmonary bypass (CPB). The platelet response to agonists, D-dimer concentration, tissue plasminogen activator (tPA), plasminogen activator inhibitor (PAI-1) antigens, and platelet receptors CD42b, CD62P, and CD41a were evaluated...
December 20, 2016: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28079906/4d-and-5d-bimetal-doped-tubular-silicon-clusters-si12m2-with-m-nb-ta-mo-and-w-a-bimetallic-configuration-model
#18
Hung Tan Pham, Devashis Majumdar, Jerzy Leszczynski, Minh Tho Nguyen
Geometries and electronic properties related to the ground state stabilities of several Si12M2 clusters (M: second-row (Nb and Mo) and third-row (Ta and W) transition metals, and their mixed bimetallic clusters M2: NbMo and TaW) were explored using density functional theory (DFT) computations. The computed results show that two different structural motifs emerge as the global energy minima of such clusters. They are basically singlet tubular structures in either a C2v prism ((1)A1) or a C6v antiprism ((1)A1) form...
January 12, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28079606/relationship-between-alternative-resuscitation-strategies-host-response-and-injury-biomarkers-and-outcome-in-septic-shock-analysis-of-the-protocol-based-care-for-early-septic-shock-study
#19
John A Kellum, Francis Pike, Donald M Yealy, David T Huang, Nathan I Shapiro, Derek C Angus
OBJECTIVES: The Protocol-based Care for Early Septic Shock trial found no differences across alternative resuscitation strategies in all-cause mortality. A separate aim was to determine whether differences in resuscitation strategies affected trajectories of biomarkers of key pathways associated with downstream clinical outcomes of sepsis and whether there were differences in survival across treatment arms for patients with different baseline biomarker profiles. DESIGN: Secondary analysis of a large randomized clinical trial...
January 10, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28079562/can-an-age-adjusted-d-dimer-level-be-adopted-in-managing-venous-thromboembolism-in-the-emergency-department-a-retrospective-cohort-study
#20
Tom Jaconelli, Mazin Eragat, Steven Crane
INTRODUCTION: Patients suspected of having venous thromboembolism (VTE), with a low pretest probability, undergo D-dimer testing. A negative D-dimer, in a low-risk patient rules out VTE with a high degree of certainty because of its high sensitivity. It is, however, a poorly specific test, and the absolute value increases with age. The aim of this study was to establish whether an age-adjusted D-dimer could be safely used instead of a standard cut-off level in low-risk patients over the age of 50 years...
January 10, 2017: European Journal of Emergency Medicine: Official Journal of the European Society for Emergency Medicine
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