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https://www.readbyqxmd.com/read/28222130/dengue-virus-antibody-database-systematically-linking-serotype-specificity-with-epitope-mapping-in-dengue-virus
#1
Sidhartha Chaudhury, Gregory D Gromowski, Daniel R Ripoll, Ilja V Khavrutskii, Valmik Desai, Anders Wallqvist
BACKGROUND: A majority infections caused by dengue virus (DENV) are asymptomatic, but a higher incidence of severe illness, such as dengue hemorrhagic fever, is associated with secondary infections, suggesting that pre-existing immunity plays a central role in dengue pathogenesis. Primary infections are typically associated with a largely serotype-specific antibody response, while secondary infections show a shift to a broadly cross-reactive antibody response. METHODS/PRINCIPAL FINDINGS: We hypothesized that the basis for the shift in serotype-specificity between primary and secondary infections can be found in a change in the antibody fine-specificity...
February 21, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28222056/physical-activity-sedentary-behavior-and-inflammatory-and-hemostatic-markers-in-men
#2
Tessa J Parsons, Claudio Sartini, Paul Welsh, Naveed Sattar, Sarah Ash, Lucy T Lennon, S Goya Wannamethee, I-Min Lee, Peter H Whincup, Barbara J Jefferis
PURPOSE: This study aimed to determine whether higher levels of physical activity (PA) and less sedentary behavior (SB) are associated with less inflammation, indicated by inflammatory and hemostatic biomarkers, in older men. METHODS: A cross-sectional study of 1139 men, from the British Regional Heart Study (mean ± SD age = 78 ± 5 yr), and longitudinal analyses of 490 men with two PA measures 1 yr apart were used in this study. Single fasting venous blood samples were analyzed for several biomarkers...
March 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28222028/expression-purification-and-characterization-of-human-cytosolic-sulfotransferase-sult-1c4
#3
Amber L Guidry, Zachary E Tibbs, Melissa Runge-Morris, Charles N Falany
Human cytosolic sulfotransferase 1C4 (hSULT1C4) is a dimeric Phase II drug-metabolizing enzyme primarily expressed in the developing fetus. SULTs facilitate the transfer of a hydrophilic sulfonate moiety from 3'-phosphoadenosine-5'-phosphosulfate (PAPS) onto an acceptor substrate altering the substrate's biological activity and increasing the compound's water solubility. While several of the hSULTs' endogenous and xenobiotic substrates have been identified, the physiological function of hSULT1C4 remains unknown...
February 21, 2017: Hormone Molecular Biology and Clinical Investigation
https://www.readbyqxmd.com/read/28221778/engineering-iron-responses-in-mammalian-cells-by-signal-induced-protein-proximity
#4
Guihua Zeng, Huanqiu Li, Yongyi Wei, Weimin Xuan, Roushu Zhang, Larisa Elise Breden, Wei Wang, Fu-Sen Liang
A new synthetic biology engineering strategy integrating chemical reactivity sensing and small molecule induced protein dimerization has been developed to generate artificial Fe(2+) signaling circuitry to control tailored cellular events in mammalian cells. The dual function probe ABA-FE18 (Fe(2+)-sensing and protein dimerization) derived from ABA was developed and used to control gene activation, signal transduction and cytoskeletal remodeling in response to Fe(2+). This technology was utilized to design signal circuitry incorporating "AND" and "OR" biologic gates that enables mammalian cells to translate different combinations of Fe(2+) and H2O2 signals into pre-defined biological outputs...
February 21, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/28221767/construction-of-a-chassis-for-a-tripartite-protein-based-molecular-motor
#5
Lara Sioban Small, Marc Bruning, Andrew Thomson, Aimee L Boyle, Roberta Davies, Paul M G Curmi, Nancy R Forde, Heiner Linke, Derek N Woolfson, Elizabeth Bromley
Improving our understanding of biological motors, both to fully comprehend their activities in vital processes, and to exploit their impressive abilities for use in bionanotechnology, is highly desirable. One means of understanding these systems is through the production of synthetic molecular motors. We demonstrate the use of orthogonal coiled-coil dimers (including both parallel and anti-parallel coiled-coils) as a hub for linking other components of a previously described synthetic molecular motor, the Tumbleweed...
February 21, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/28221726/how-the-molecular-packing-affects-the-room-temperature-phosphorescence-in-pure-organic-compounds-ingenious-molecular-design-detailed-crystal-analysis-and-rational-theoretical-calculations
#6
Yujun Xie, Yuwei Ge, Qian Peng, Conggang Li, Qianqian Li, Zhen Li
Long-lived phosphorescence at room temperature (RTP) from pure organic molecules is rare. Recent research reveals various crystalline organic molecules can realize RTP with lifetimes extending to the magnitude of second. There is little research on how molecular packing affecting RTP. Three compounds are designed with similar optical properties in solution, but tremendously different solid emission characteristics. By investigating the molecular packing arrangement in single crystals, it is found that the packing style of the compact face to face favors of long phosphorescence lifetime and high photoluminescence efficiency, with the lifetime up to 748 ms observed in the crystal of CPM ((9H-carbazol-9-yl)(phenyl)methanone)...
February 21, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28221379/bridgehead-isomer-effects-in-bis-phosphido-bridged-diiron-hexacarbonyl-proton-reduction-electrocatalysts
#7
Ahibur Rahaman, Carolina Gimbert-Suriñach, Arne Ficks, Graham E Ball, Mohan Bhadbhade, Matti Haukka, Lee Higham, Ebbe Nordlander, Stephen B Colbran
The influence of the substitution, orientation and structure of the phosphido bridges in [Fe2(CO)6(μ-PR2)2] electrocatalysts of proton reduction has been studied. The isomers e,a-[Fe2(CO)6{μ-P(Ar)H}2] (1a(Ar): Ar = Ph, 2'-methoxy-1,1'-binaphthyl (bn')), e,e-[Fe2(CO)6{μ-P(Ar)H}2] (1b(Ar): Ar = Ph, bn') were isolated from reactions of iron pentacarbonyl and the corresponding primary phosphine, syntheses that also afforded the phosphinidene-capped tri-iron clusters, [Fe3(CO)9(μ-CO)(μ3-Pbn')] (2) and [Fe3(CO)9(μ3-PAr)2] (3(Ar), Ar = Ph, bn')...
February 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28221357/direct-assembly-of-multiply-oxygenated-carbon-chains-by-decarbonylative-radical-radical-coupling-reactions
#8
Kengo Masuda, Masanori Nagatomo, Masayuki Inoue
Pentoses and hexoses contain more than three oxygen-bearing stereocentres and are ideal starting materials for the synthesis of multiply oxygenated natural products such as sagittamide D, maitotoxin and hikizimycin. Here we demonstrate new radical-radical homocoupling reactions of sugar derivatives with minimal perturbation of their chiral centres. The radical exchange procedure using Et3B/O2 converted sugar-derived α-alkoxyacyl tellurides into α-alkoxy radicals via decarbonylation and rapidly dimerized the monomeric radicals...
March 2017: Nature Chemistry
https://www.readbyqxmd.com/read/28221350/controlling-quantum-beating-signals-in-2d-electronic-spectra-by-packing-synthetic-heterodimers-on-single-walled-carbon-nanotubes
#9
Lili Wang, Graham B Griffin, Alice Zhang, Feng Zhai, Nicholas E Williams, Richard F Jordan, Gregory S Engel
In multidimensional spectroscopy, dynamics of coherences between excited states report on the interactions between electronic states and their environment. The prolonged coherence lifetimes revealed through beating signals in the spectra of some systems may result from vibronic coupling between nearly degenerate excited states, and recent observations confirm the existence of such coupling in both model systems and photosynthetic complexes. Understanding the origin of beating signals in the spectra of photosynthetic complexes has been given considerable attention; however, strategies to generate them in artificial systems that would allow us to test the hypotheses in detail are still lacking...
February 21, 2017: Nature Chemistry
https://www.readbyqxmd.com/read/28221242/disseminated-intravascular-coagulation-in-emergency-department-patients-with-primary-postpartum-hemorrhage
#10
Chang Hwan Sohn, So Ra Kim, Youn-Jung Kim, Dong Woo Seo, Shin Ahn, Yoon-Seon Lee, Jae Ho Lee, Bum Jin Oh, Hye-Sung Won, Jae-Yoon Shim, Kyoung-Soo Lim, Won Young Kim
The aim of this study was to evaluate the prevalence of disseminated intravascular coagulation and to determine whether the presence of disseminated intravascular coagulation is associated with major adverse events in patients with primary postpartum hemorrhage who present to the emergency department.This retrospective case-control study was conducted in the emergency department of a university-affiliated, tertiary referral center between January 1, 2004 and December 31, 2013. Patients were classified into disseminated intravascular coagulation (disseminated intravascular coagulation score ≥ 5) and non-disseminated intravascular coagulation groups...
February 17, 2017: Shock
https://www.readbyqxmd.com/read/28220998/self-assembly-of-iodine-in-superfluid-helium-droplets-halogen-bonds-and-nanocrystals
#11
Yunteng He, Jie Zhang, Lei Lei, Wei Kong
We present evidence of halogen bond in iodine clusters formed in superfluid helium droplets based on results from electron diffraction. Iodine crystals are known to form layered structures with intralayer halogen bonds, with interatomic distances shorter than the sum of the van der Waals radii of the two neighboring atoms. The diffraction profile of dimer dominated clusters embedded in helium droplets reveals an interatomic distance of 3.65 Å, much closer to the value of 3.5 Å in iodine crystals than to the van der Waals distance of 4...
February 21, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28220925/slow-relaxation-of-the-magnetization-observed-in-an-antiferromagnetically-ordered-phase-for-scm-based-two-dimensional-layered-compounds
#12
Koichi Kagesawa, Yuki Nishimura, Hiroki Yoshida, Brian K Breedlove, Masahiro Yamashita, Hitoshi Miyasaka
Two-dimensional layered compounds with different counteranions, [{Mn(salen)}4C6](BF4)2·2(CH3OH) (1) and [{Mn(salen)}4C6](PF6)2·2(CH3OH) (2) (salen(2-) = N,N'-bis(salicylideneiminato), C6(2-) = C6H12(COO)2(2-)), were synthesized by assembling [Mn(salen)(H2O)]X (X(-) = BF4(-) and PF6(-)) and C6H12(CO2(-))2 (C6(2-)) in a methanol/2-propanol medium. The compounds have similar structures, which are composed of Mn(salen) out-of-plane dimers bridged by μ(4)-type C6(2-) ions, forming a brick-wall-type network of [-{Mn2}-OCO-] chains alternately connected via C6H12 linkers of C6(2-) moieties...
February 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28220917/ditopic-receptors-containing-urea-groups-for-solvent-extraction-of-cu-ii-salts
#13
Israel Carreira-Barral, Marta Mato-Iglesias, Andrés de Blas, Carlos Platas-Iglesias, Peter A Tasker, David Esteban-Gómez
The ditopic receptor L3 [1-(2-((7-(4-(tert-butyl)benzyl)-1,4,7,10-tetraazacyclododecan-1-yl)methyl)phenyl)-3-(3-nitrophenyl)urea] containing a macrocyclic cyclen unit for Cu(ii)-coordination and a urea moiety for anion binding was designed for recognition of metal salts. The X-ray structure of [CuL3(SO4)] shows that the sulfate anion is involved in cooperative binding via coordination to the metal ion and hydrogen-bonding to the urea unit. This behaviour is similar to that observed for the related receptor L1 [1-(2-((bis(pyridin-2-ylmethyl)amino)methyl)phenyl)-3-(3-nitrophenyl)urea], which forms a dimeric [CuL1(μ-SO4)]2 structure in the solid state...
February 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28220887/mass-spectrometric-analysis-of-trpm6-and-trpm7-phosphorylation-reveals-regulatory-mechanisms-of-the-channel-kinases
#14
Na Cai, Zhiyong Bai, Vikas Nanda, Loren W Runnels
TRPM7 and TRPM6 were the first identified bifunctional channels to contain their own kinase domains, but how these channel-kinases are regulated is poorly understood. Previous studies identified numerous phosphorylation sites on TRPM7, but very little is known about TRPM6 phosphorylation or sites on TRPM7 transphosphorylated by TRPM6. Our mass spectrometric analysis of homomeric and heteromeric TRPM7 and TRPM6 channels identified phosphorylation sites on both proteins, as well as several prominent sites on TRPM7 that are commonly modified through autophosphorylation and transphosphorylation by TRPM6...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28220528/enzymatic-characterization-and-functional-implication-of-two-structurally-different-isocitrate-dehydrogenases-from-xylella-fastidiosa
#15
Peipei Lv, Wanggang Tang, Peng Wang, Zhengyu Cao, Guoping Zhu
Isocitrate dehydrogenase (IDH) is a key enzyme at the critical junction between the tricarboxylic acid cycle and the glyoxylate cycle. Most bacteria have only one IDH, while a few of bacteria contain two IDH isozymes. The coexistence of two different type IDHs in one organism was little known. Xylella fastidiosa is a nutritionally fastidious plant pathogen that contains two structurally different IDHs, an NAD(+) -dependent homodimeric IDH (diXfIDH) and an NADP(+) -dependent monomeric IDH (monoXfIDH). Kinetic characterization showed that diXfIDH displayed 206-fold preferences for NAD(+) over NADP(+) , while monoXfIDH showed 13800-fold preferences for NADP(+) over NAD(+) ...
February 21, 2017: Biotechnology and Applied Biochemistry
https://www.readbyqxmd.com/read/28220282/serum-trace-elements-are-associated-with-hemostasis-lipid-spectrum-and-inflammatory-markers-in-men-suffering-from-acute-ischemic-stroke
#16
Anatoly V Skalny, Lydmila L Klimenko, Aliya A Turna, Maria N Budanova, Ivan S Baskakov, Marina S Savostina, Aksana N Mazilina, Anatoly I Deyev, Margarita G Skalnaya, Alexey A Tinkov
The primary objective of the study is investigation of the association between trace elements status and hemostasis, lipid spectrum and inflammatory markers in acute ischemic stroke (AIS). A total of 30 men suffering from AIS and 30 healthy controls were involved in the current survey. Blood count, serum lipid spectrum, complement components C4 and C3a, vascular endothelial growth factor (VEGF), S100B protein, NR2 antibodies (NR2Ab), and total antioxidant status (TAS), as well as plasma fibrinogen, and D-dimer levels and activated partial thromboplastin time (APTT) were assessed...
February 20, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/28219450/evaluation-of-serum-d-dimer-fibrinogen-and-ca19-9-for-postoperative-monitoring-and-survival-prediction-in-resectable-pancreatic-carcinoma
#17
Junli Cao, Zhanzhao Fu, Liming Gao, Xin Wang, Shaohui Cheng, Xiuchao Wang, He Ren
BACKGROUND: We sought to investigate the efficacy of serum D-dimer, fibrinogen, and CA19-9 for postoperative monitoring and prediction of survival in patients with resectable pancreatic carcinoma (PC). METHODS: One hundred and nineteen patients with resectable PC were enrolled. Serum D-dimer, fibrinogen, and CA19-9 values were analyzed before surgery and at the stages of relapse-free and progression disease. RESULTS: D-dimer, fibrinogen, and CA19-9 were significantly higher at the active stage of PC than those at the relapse-free stage [1059...
February 20, 2017: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28219085/fibrinolysis-in-trauma-myth-reality-or-something-in-between
#18
Mark Walsh, Jacob Shreve, Scott Thomas, Ernest Moore, Hunter Moore, Daniel Hake, Tim Pohlman, Patrick Davis, Victoria Ploplis, Andres Piscoya, Julie Wegner, John Bryant, Anton Crepinsek, James Lantry, Forest Sheppard, Francis Castellino
The emphasis on fibrinolysis as an important contributor to trauma-induced coagulopathy (TIC) has led to a debate regarding the relative clinical significance of fibrinolysis in the setting of trauma. The debate has centered on two camps. The one camp defines fibrinolysis in trauma by standard coagulation tests as well as fibrin split products, D-dimers, and plasmin/antiplasmin levels. This camp favors a more liberal use of tranexamic acid and attributes more significance to hyperfibrinolysis in TIC. The other camp favors a definition of fibrinolysis based on the viscoelastic tests (VET), rotational thromboelastometry (ROTEM), and thromboelastography (TEG)...
February 20, 2017: Seminars in Thrombosis and Hemostasis
https://www.readbyqxmd.com/read/28219067/d-dimer-plasma-levels-parallel-the-clinical-response-to-omalizumab-in-patients-with-severe-chronic-spontaneous-urticaria
#19
Riccardo Asero, Angelo V Marzano, Silvia Ferrucci, Massimo Cugno
Omalizumab is very effective in the majority of patients with severe chronic spontaneous urticaria (CSU), but its mechanism of action is still unclear. In CSU the coagulation cascade is activated with an intensity that parallels the disease severity, and elevated plasma D-dimer levels are associated with a poor response to both antihistamines and cyclosporin. We measured D-dimer plasma levels before and after the first administration of omalizumab in 32 patients with severe CSU. A number of clinical and laboratory parameters were recorded, including the urticaria activity score, presence of angioedema, disease duration, C-reactive protein, anti-nuclear, and anti-thyroid antibodies...
February 21, 2017: International Archives of Allergy and Immunology
https://www.readbyqxmd.com/read/28218919/targeting-casp8-and-fadd-like-apoptosis-regulator-ameliorates-nonalcoholic-steatohepatitis-in-mice-and-nonhuman-primates
#20
Pi-Xiao Wang, Yan-Xiao Ji, Xiao-Jing Zhang, Ling-Ping Zhao, Zhen-Zhen Yan, Peng Zhang, Li-Jun Shen, Xia Yang, Jing Fang, Song Tian, Xue-Yong Zhu, Jun Gong, Xin Zhang, Qiao-Fang Wei, Yong Wang, Jing Li, Lu Wan, Qingguo Xie, Zhi-Gang She, Zhihua Wang, Zan Huang, Hongliang Li
Nonalcoholic steatohepatitis (NASH) is a progressive disease that is often accompanied by metabolic syndrome and poses a high risk of severe liver damage. However, no effective pharmacological treatment is currently available for NASH. Here we report that CASP8 and FADD-like apoptosis regulator (CFLAR) is a key suppressor of steatohepatitis and its metabolic disorders. We provide mechanistic evidence that CFLAR directly targets the kinase MAP3K5 (also known as ASK1) and interrupts its N-terminus-mediated dimerization, thereby blocking signaling involving ASK1 and the kinase MAPK8 (also known as JNK1)...
February 20, 2017: Nature Medicine
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