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D dimer

Hong-Hua Wu, Xu Deng, Hu Zhang, Ying-Peng Chen, Shu-Song Ying, Yi-Jing Wu, Yan-Ting Liu, Yan Zhu, Xiu-Mei Gao, Yan-Tong Xu, Li Li
Dinardokanshones C-E, three sesquiterpenoid dimers comprising an unusual nornardosinane-type sesquiterpenoid core and an aristolane-type sesquiterpenoid unit conjugated by an extra pyran or furan ring, together with monomeric sesquiterpenoids isonardoeudesmols A-D and nardoeudesmol D, were isolated from the underground parts of Nardostachys jatamansi DC. Structures of the eight compounds were elucidated by analysis of the extensive spectroscopic data, and their absolute configurations were established by analysis of NOESY and X-ray diffraction data, combined with computational electronic circular dichroism (ECD) calculations...
March 12, 2018: Phytochemistry
F Nici, G Oliviero, A P Falanga, S D'Errico, M Marzano, D Musumeci, D Montesarchio, S Noppen, C Pannecouque, G Piccialli, N Borbone
By combining the ability of short G-rich oligodeoxyribonucleotides (ODNs) containing the sequence 5'CGGA3' to form higher order G-quadruplex (G4) complexes with the tetra-end-linked (TEL) concept to produce aptamers targeting the HIV envelope glycoprotein 120 (gp120), three new TEL-ODNs (1-3) having the sequence 5'CGGAGG3' were synthesized with the aim of studying the effect of G4 dimerization on their anti-HIV activity. Furthermore, in order to investigate the effect of the groups at the 5' position, the 5' ends of 1-3 were left uncapped (1) or capped with either the lipophilic dimethoxytrityl (DMT) (2) or the hydrophilic glucosyl-4-phosphate (3) moieties...
March 15, 2018: Organic & Biomolecular Chemistry
Hong Xiao, Jian Zhou, Xing Liu
Two new cadmium bromoplumbates [CdPb2 Br2 L2 ]n (1, L = ethylene glycol) and [CdPb6 Br6 L4 ]n (2) have been solvothermally synthesized and structurally characterized. 1 contains 1-D neutral heterometallic chains [CdPb2 Br2 L2 ]n , which are further connected via weak Pb-Br bonds, resulting in a 3-D network structure. The 3-D framework of 2 is constructed by the interconnection of a 2-D neutral layer [CdPb6 Br6 L4 ]n via weak Pb-Br bonds. The [CdPb6 Br6 L4 ]n layer is based on the linkages of dimeric [Pb2 Br4 ] units and heterometallic crown [Cd(Pb4 O4 )Br2 ] clusters containing a rare eight-membered [Pb4 O4 ] ring...
March 15, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
Yusuke Ito, Kengo Noguchi, Yoshiyuki Morishima, Kyoji Yamaguchi
: No rodent models are currently available for evaluating inhibitors of the activated form of thrombin-activatable fibrinolysis inhibitor (TAFIa) without exogenous supplementation of tissue-type plasminogen activator (tPA). Characterization of tPA transgenic rats as a tool for the nonclinical evaluation of TAFIa inhibitors is the objective of the current study. tPA transgenic rats were subjected to rat models of tissue-factor-induced thromboembolism, FeCl3-induced deep vein thrombosis (DVT) and arterial thrombosis, and tail bleeding...
March 13, 2018: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
Marc Righini, Helia Robert-Ebadi
During the last three decades, considerable advances in the management of patients with suspected pulmonary embolism (PE) have improved diagnostic accuracy and made management algorithms safer, easier to use and well standardized. These diagnostic algorithms are mainly based on the assessment of clinical pretest probability, D-Dimer measurement and imaging tests, mainly computed tomography pulmonary angiography (CTPA). These diagnostic algorithms allow a safe and cost-effective diagnosis for most patients with suspected PE...
February 2018: Hämostaseologie
T K Aliev, I G Dement'eva, V A Toporova, V V Argentova, L P Pozdnyakova, M N Bokov, D A Dolgikh, P G Sveshnikov, M P Kirpichnikov
We obtained dimeric forms of IgA1- and IgA2m1-isotypes of FI6 antibody broadly specific to hemagglutinins of different subtypes of influenza A virus. It was shown that the dimers of IgA1 isotype are characterized by a higher antigen-binding activity compared to the IgA2m1 dimers. The affinity of IgA1 dimers to the strains of the H1N1 subtype is higher than that of the H3N2 subtype, which correlates with the properties of the parental human FI6 antibody.
January 2018: Doklady. Biochemistry and Biophysics
Alauddin Kochai, Meric Enercan, Sinan Kahraman, Cagatay Ozturk, Azmi Hamzaoglu
PURPOSE: The aim of this study is to compare the efficacy of the mechanical aspiration technique just prior to cement application in the standard vertebroplasty (VP). METHODS: Forty patients were included in the study. In group A, mechanical aspiration of the cavity was done just before the cement injection and in group B aspiration of vertebral body did not perform, VP was done with the same size cannula, same injection force, same injection speed and same cement viscosity...
January 2018: Journal of Orthopaedic Surgery
Stephen Shinsky, David W Christianson
Polyamines such as putrescine, spermidine, and spermine are small aliphatic cations that serve myriad biological functions in all forms of life. While polyamine biosynthesis and cellular trafficking pathways are generally well defined, it is only recently that the molecular basis of reversible polyamine acetylation has been established. In particular, enzymes that catalyze polyamine deacetylation reactions have been identified and structurally characterized: histone deacetylase 10 (HDAC10) from Homo sapiens and Danio rerio (zebrafish) is a highly specific N8-acetylspermidine deacetylase, and its prokaryotic counterpart, acetylpolyamine amidohydrolase (APAH) from Mycoplana ramosa, is a broad-specificity polyamine deacetylase...
March 13, 2018: Biochemistry
Satya Prakash Shukla, D Gomika Udugamasooriya
We recently identified a peptide-peptoid hybrid, PPS1, which specifically recognized lipid-phosphatidylserine (PS). PPS1 consists of distinct positively charged and hydrophobic residue-containing regions. PPS1 monomer was inactive, but the dimeric form, PPS1D1, displayed strong cytotoxicity for lung cancer cells compared to normal cells in vitro, and reduced the tumor growth in vivo. The minimum pharmacophore of PPS1D1 showed that the first (methionine) and fourth (N-lysine) residues were not important for PPS1D1 cytotoxic activity...
December 1, 2017: MedChemComm
Frédéric Cochennec, Jean Marzelle
Acute aortic syndromes include aortic dissections, intramural hematomas, penetrating ulcers, ruptured or contained ruptured aortic aneurysms. In presence of acute thoracic or dorsal pain, elevated D-Dimers and if acute coronary artery syndrome has been ruled out, additional imaging should be performed to detect acute aortic pathologies. Acute type A dissections involve the ascending aorta. Emergent open repair is the preferred treatment. Acute type B dissections involve the thoracic descending aorta. Endovascular treatment using thoracic stent grafts is indicated in complicated cases (malperfusion, rupture, uncontrolled hypertension) or in cases where risk factors of aortic degeneration are identified...
March 8, 2018: La Presse Médicale
Christopher McCleese, Zhanqian Yu, Nopondo Ndoh Esemoto, Charles Kolodziej, Buddhadev Maiti, Srijana Bhandari, Barry D Dunietz, Clemens Burda, Marcin Ptaszek
Excitonically-coupled bacteriochlorin (BC) dimers constitute a primary electron donor (special pair) in bacterial photosynthesis and absorbing units in light-harvesting antenna. However, the exact nature of the excited state of these dyads is still not fully understood. Here, we report a detailed spectroscopic and computational investigation of a series of symmetrical bacteriochlorin dimers, where the bacteriochlorins are connected either directly or by a phenylene bridge with variable length. The excited state of these dyads is quenched in high-dielectric solvents, which we attribute to photoinduced charge transfer...
March 10, 2018: Journal of Physical Chemistry. B
M G Herrera, D S Vazquez, R Sreij, M Drechsler, Y Hertle, T Hellweg, V I Dodero
Alpha-gliadin is a highly immunogenic protein from wheat, which is associated with many human diseases, like celiac disease and non-celiac gluten sensitivity. Because of that, gliadin solution is subject to intense biomedical research. However, the physicochemical nature of the employed gliadin solution at physiological pH is not understood. Herein, we present a supramolecular evaluation of the alpha-gliadin protein in water at pH 3.0 by dynamic light scattering (DLS), cryo-transmission electron microscopy (cryo-TEM) and small-angle-...
February 27, 2018: Colloids and Surfaces. B, Biointerfaces
Kuppan Gokulan, Sangeeta Khare, Carl E Cerniglia, Steven L Foley, Kottayil I Varughese
The final step of peptidoglycan (PG) synthesis in all bacteria is the formation of cross-linkage between PG-stems. The cross-linking between amino acids in different PG chains gives the peptidoglycan cell wall a 3-dimensional structure and adds strength and rigidity to it. There are two distinct types of cross-linkages in bacterial cell walls. D,D-transpeptidase (D,D-TPs) generate the classical 4➔3 cross-linkages and the L,D-transpeptidase (L,D-TPs) generate the 3➔3 non-classical peptide cross-linkages...
March 9, 2018: AAPS Journal
Wadie D Mahauad-Fernandez, Chioma M Okeoma
Bone marrow stromal antigen 2 (BST-2) also known as Tetherin has been implicated in the growth and progression of many cancers. BST-2 employs its pro-tumor effects through the formation of BST-2:BST-2 dimers which ultimately promotes cell to cell and cell to matrix adhesion, cell motility, survival, and growth. The aim of this study was to evaluate the effect of a novel BST-2-based peptide-B49 on adhesion and growth of breast cancer cells. Homotypic/heterotypic adhesion, three-dimensional spheroid formation, and anchorage-independent growth were used to assess the effect of B49 on cell adhesion and growth...
March 9, 2018: Scientific Reports
Mohsen Ramezanpour, Jaeyong Lee, Svetla G Taneva, D Peter Tieleman, Rosemary B Cornell
The activity of CTP:phosphocholine cytidylyltransferase (CCT), a key enzyme in phosphatidylcholine synthesis, is regulated by reversible interactions of a lipid-inducible amphipathic helix (domain M) with membrane phospholipids.  When dissociated from membranes a portion of the M domain functions as an auto-inhibitory (AI) element to suppress catalysis.  The AI helix from each subunit binds to a pair of α-helices (αE) that extend from the base of the catalytic dimer to create a four-helix bundle. The bound AI helices make intimate contact with loop L2, housing a key catalytic residue, Lys-122...
March 8, 2018: Journal of Biological Chemistry
Yang Yu, Yuying Wei, Xiangrong Zhang, Xinyu Li
OBJECTIVE: To explore the effects of early intervention with heparin on function of coagulopathy, liver and kidney as well as the prognosis in rats with exertional heatstroke (EHS) under the ambient air of high temperature and low humidity. METHODS: 108 healthy SPF male Sprague-Dawley (SD) rats were randomly divided into normal temperature control group, EHS + normal saline (NS) group and EHS + heparin group. Of which 54 rats were collected for survival analysis (18 rats in each group), the weight change and 8-hour survival rate were observed, and Kaplan-Meier survival curves were drawn...
March 2018: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
Hyeonseok Jin, Upasana Roy, Gwangrog Lee, Orlando D Schärer, Yunje Cho
DNA interstrand cross-links (ICLs) block the progress of the replication and transcription machineries and can weaken chromosomal stability, resulting in various diseases. FANCD2/FANCI-associated nuclease (FAN1) is a conserved structure-specific nuclease that unhooks DNA ICLs independently of the Fanconi anemia pathway. Recent structural studies have proposed two different mechanistic features for ICL unhooking by human FAN1: a specific basic pocket that recognizes the terminal phosphate of a 1-nt 5' flap or FAN1 dimerization...
March 7, 2018: Journal of Biological Chemistry
Rong Chen, Lijie Zhang, Jianxun Qi, Nianzhi Zhang, Ling Zhang, Shugang Yao, Yanan Wu, Bo Jiang, Zhenbao Wang, Hongyu Yuan, Qiujin Zhang, Chun Xia
The emergence of adaptive immunity in jawed vertebrates depended on the appearance of variable immune receptors, BCRs and TCRs, which exhibit variable-J-constant (VJ -C)-type Ig superfamily folds. Hitherto, however, the structures of IgV-J-IgC-type molecules had never been characterized in invertebrates, leaving the origin of BCR/TCR-type molecules unknown. Using x-ray crystallography, the structure of a VJ -C2 molecule, named AmpIgVJ -C2, was determined in amphioxus ( Branchiostoma floridae ). The first domain shows typical V folding, including the hydrophobic core, CDR analogs, and eight conserved residues...
March 7, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
Hiral N Golakiya, Viren N Naik, Hiren N Hirapara, Kalpanaben H Mody, Alpesh P Goswami, Chandrabhanu Tripathi
Our aim of the present study was to evaluate the anticoagulant effect of sulfated polysaccharides (SPS) from Codium dwarkense Bergesen in ic-carrageenan induced hypercoagulable state in Wistar albino rats. 48 Wistar albino rats of either sex were randomly divided into 6 groups - disease control, active control, treatment lowmand high dose and preventive low and high dose. K-Carrageenan (3 mg/kg) single dose intravenously was given in rat tail vein at pre-decided time to produce hypercoagulable state. Baseline, 24, 48 and 72 hours duration blood samples were collected for PT, INR, aPTT, platelet count and fibrinogen level, FDP and D-Dimer measurements...
May 2017: Acta Poloniae Pharmaceutica
Gianni Belcaro, Umberto Cornelli, Mark Dugall, Morio Hosoi, Roberto Cotellese, Beatrice Feragalli
BACKGROUND: This registry study evaluated the effects of Pycnogenol® on edema and thrombotic complications in long-haul flights; jet lag was also evaluated. METHODS: Four hundred and fifty subjects at different risk levels for thrombosis, flying in economy class twice a week for more than 8 hours, were included; 295 completed the registry study and were subdivided in 3 groups according to their risk level - low, moderate, or high. The high-risk group also received Aspirin®...
April 2018: Minerva Cardioangiologica
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