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https://www.readbyqxmd.com/read/28213380/complex-formation-with-pentraxin-2-regulates-factor-x-plasma-levels-and-macrophage-interactions
#1
Vincent Muczynski, Gabriel Aymé, Véronique Regnault, Marc Vasse, Delphine Borgel, Paulette Legendre, Amine Bazaa, Amélie Harel, Cécile Loubière, Peter J Lenting, Cécile V Denis, Olivier D Christophe
Recently, we have identified scavenger receptor-AI (SR-AI) as a receptor for coagulation factor X (FX), mediating the formation of a FX-reservoir at the macrophage-surface (Muczynski, Blood 2016 127:778). Here, we demonstrate that the FX/SR-AI-complex comprises a third protein, pentraxin-2. The presence of pentraxin-2 is essential to prevent internalization of FX by SR-AI, while the presence of FX is needed to interfere with internalization of pentraxin-2. Binding studies showed that FX, SR-AI and pentraxin-2 independently bind to each other (Kd,app: 0...
February 17, 2017: Blood
https://www.readbyqxmd.com/read/28212682/erratum-to-cause-effect-relations-between-55%C3%A2-kd-soluble-tnf-receptor-concentrations-and-specific-and-unspecific-symptoms-in-a-patient-with-mild-sle-disease-activity-an-exploratory-time-series-analysis-study
#2
Christian Schubert, Julia Haberkorn, Francisco M Ocaña-Peinado, Paul König, Norbert Sepp, Mirjam Schnapka-Köpf, Dietmar Fuchs
No abstract text is available yet for this article.
February 17, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28211267/efficient-and-selective-uptake-of-tco4-by-a-cationic-metal-organic-framework-material-with-open-ag-sites
#3
Daopeng Sheng, Lin Zhu, Chao Xu, Chengliang Xiao, Yanlong Wang, Yaxing Wang, Lanhua Chen, Juan Diwu, Jing Chen, Zhifang Chai, Thomas E Albrecht-Schmitt, Shuao Wang
99Tc is one of the most problematic radioisotopes in used nuclear fuel owing to its combined features of high fission yield, long half-life, and high environmental mobility. There are only a handful of functional materials that can remove TcO4- anion from aqueous solution and identifying for new, stable materials with high anion-exchange capacities, fast kinetics, and good selectivity remains a challenge. We report here an 8-fold interpenetrated three-dimensional cationic metal-organic framework material, SCU-100, which is assembled from a tetradentate neutral nitrogen-donor ligand and two-coordinate Ag+ cations as potential open metal sites...
February 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28209981/fibulin-6-regulates-pro-fibrotic-tgf-%C3%AE-responses-in-neonatal-mouse-ventricular-cardiac-fibroblasts
#4
Arpita Chowdhury, Lisa Hasselbach, Frank Echtermeyer, Nidhi Jyotsana, Gregor Theilmeier, Christine Herzog
Fibulin-6, an essential component of extracellular matrix determines the architecture of cellular junctions in tissues undergoing strain. Increased expression and deposition of fibulin-6 facilitates fibroblast migration in response to TGF-β, following myocardial infarction in mouse heart. The underlying mechanism still remains elusive. In conjunction with our previous study, we have now demonstrated that in fibulin-6 knockdown (KD) fibroblasts, not only TGF-β dependent migration, but also stress fiber formation, cellular networking and subsequently fibroblast wound contraction is almost abrogated...
February 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28209710/a-model-for-the-conformational-activation-of-the-structurally-quiescent-metalloprotease-adamts13-by-von-willebrand-factor
#5
Kieron South, Marta O Freitas, David A Lane
Blood loss is prevented by the multi-domain glycoprotein von Willebrand factor (VWF), which binds exposed collagen at damaged vessels and captures platelets. VWF is regulated by the metalloprotease ADAMTS13, which, in turn, is conformationally activated by VWF. To delineate the structural requirements for VWF-mediated conformational activation of ADAMTS13, we performed binding and functional studies with a panel of truncated ADAMTS13 variants. We demonstrate that both the isolated CUB1 and CUB2 domains in ADAMTS13 bind to the spacer domain exosite of a truncated ADAMTS13 variant, MDTCS (KD of 135 ± 10...
February 16, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28206707/probing-the-interactions-of-cytotoxic-pt-1s-2s-dach-5-6-dimethyl-1-10-phenanthroline-and-its-pt-iv-derivatives-with-human-serum
#6
Dan Gibson, Benjamin Harper, Aviva Friedman-Ezra, Roman Sirota, Emanuele Emanuele Petruzzella, Janice R Aldrich-Wright
The discrepancy between the in vitro cytotoxic results and the in vivo performance of Pt56MeSS, prompted us to look into its interactions and those of its Pt(IV) derivatives with human serum, HSA, lipoproteins and serum supplemented cell culture medium. The Pt(II) complex, Pt56MeSS, binds non-covalently and reversibly to slow tumbling proteins in human serum and in cell culture medium and interacts through the phenanthroline with HSA with a Kd of about 1.5 × 10-6. All Pt(IV) complexes were stable to reduction in HS but those with axial carboxylate ligands, cct-[Pt(1S,2S-DACH)(5,6-dimethyl-1,10-phenantroline)(acetato)2](TFA)2 (Pt56MeSS(OAc)2) and cct-[Pt(1S,2S-DACH)(5,6-dimehtyl-1,10-phenantroline)(phenylbutyrate)2](TFA)2 (Pt56MeSS(PhB)2), were spontaneously reduced at pH=7 or higher in phosphate buffer, but not in tris buffer (pH=8)...
February 16, 2017: ChemMedChem
https://www.readbyqxmd.com/read/28204891/low-titer-isolated-anti-ro-ssa-60-kd-antibodies-is-correlated-with-positive-pregnancy-outcomes-in-women-at-risk-of-congenital-heart-block
#7
Marta Tonello, Ariela Hoxha, Elena Mattia, Alessandra Zambon, Silvia Visentin, Alessia Cerutti, Anna Ghirardello, Ornella Milanesi, Amelia Ruffatti
Congenital heart block (CHB) is an autoantibody mediated disorder presumably caused by placental transmission of maternal autoantibodies to Ro/SSA 52 kd, p200, Ro/SSA 60 kd, La/SSB ribonucleoproteins. This study investigated the clinical significance of isolated anti-Ro/SSA 52 kd, anti-p200, anti-Ro/SSA 60 kd, and anti-La/SSB antibodies in positive pregnant patients. One hundred sixty-three pregnant women positive to anti-Ro/SSA 52 kd and/or anti-Ro/SSA 60 kd and/or anti-La/SSB antibodies were prospectively enrolled in the study...
February 15, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28203257/the-outcome-of-short-term-low-dose-aspirin-treatment-in-kawasaki-disease-based-on-inflammatory-markers
#8
Jae Won Yoo, Ji Mok Kim, Hong Ryang Kil
PURPOSE: Previously, Kawasaki disease (KD) treatment with low-dose aspirin was administered for 6-8 weeks after the acute phase. However, inflammatory marker levels normalize before 6-8 weeks. In this study, we aimed to investigate the clinical outcome of short-term low-dose aspirin treatment based on inflammatory and thrombotic marker levels. METHODS: We performed a retrospective review of the medical records of patients with KD who were hospitalized at Chungnam National University Hospital between September 2012 and May 2014...
January 2017: Korean Journal of Pediatrics
https://www.readbyqxmd.com/read/28202390/systemic-injection-of-rpe65-programmed-bone-marrow-derived-cells-prevents-progression-of-chronic-retinal-degeneration
#9
Xiaoping Qi, S Louise Pay, Yuanqing Yan, James Thomas, Alfred S Lewin, Lung-Ji Chang, Maria B Grant, Michael E Boulton
Bone marrow stem and progenitor cells can differentiate into a range of non-hematopoietic cell types, including retinal pigment epithelium (RPE)-like cells. In this study, we programmed bone marrow-derived cells (BMDCs) ex vivo by inserting a stable RPE65 transgene using a lentiviral vector. We tested the efficacy of systemically administered RPE65-programmed BMDCs to prevent visual loss in the superoxide dismutase 2 knockdown (Sod2 KD) mouse model of age-related macular degeneration. Here, we present evidence that these RPE65-programmed BMDCs are recruited to the subretinal space, where they repopulate the RPE layer, preserve the photoreceptor layer, retain the thickness of the neural retina, reduce lipofuscin granule formation, and suppress microgliosis...
February 12, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28202118/-clinical-and-laboratory-features-of-macrophage-activation-syndrome
#10
Li Guo, Mei-Ping Lu, Gui-Juan Dong, Li-Ping Teng, Yi-Ping Xu, Li-Xia Zou, Qi Zheng
OBJECTIVE: To study the clinical and laboratory features of macrophage activation syndrome (MAS) at the early stage of diagnosis, and to explore a method for early identification of MAS. METHODS: A retrospective analysis was performed for the demographic data, clinical and laboratory features, and treatment outcomes of 21 MAS patients. RESULTS: Of the 21 MAS patients, 14 had systemic juvenile idiopathic arthritis, 5 had Kawasaki disease (KD), and 2 had connective tissue disease (CTD) as primary diseases...
February 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28199946/bioavailability-and-bioaccessibility-of-polycyclic-aromatic-hydrocarbons-from-post-pyrolytically-treated-biochars
#11
Isabel Hilber, Philipp Mayer, Varvara Gouliarmou, Sarah E Hale, Gerard Cornelissen, Hans-Peter Schmidt, Thomas D Bucheli
Bioaccessibility data of PAHs from biochar produced under real world conditions is scarce and the influence of feedstock and various post-pyrolysis treatments common in agriculture, such as co-composting or lacto-fermentation to produce silage fodder, on their bioavailability and bioaccessibility has hardly been studied. The total (Ctotal), and freely dissolved (i.e., bioavailable) concentrations (Cfree) of the sum of 16 US EPA PAHs of 43 biochar samples produced and treated in such ways ranged from 0.4 to almost 2000 mg/kg, and from 12 to 81 ng/L, respectively, which resulted in very high biochar-water partition coefficients (4...
February 4, 2017: Chemosphere
https://www.readbyqxmd.com/read/28199108/application-of-off-rate-screening-in-the-identification-of-novel-pan-isoform-inhibitors-of-pyruvate-dehydrogenase-kinase
#12
Paul A Brough, Lisa Baker, Simon Bedford, Kirsten Brown, Seema Chavda, Victoria Chell, Jalanie D'Alessandro, Nicholas G M Davies, Ben Davis, Loic Le Strat, Alba T Macias, Daniel Maddox, Patrick C Mahon, Andrew J Massey, Natalia Matassova, Sean McKenna, Jonathan D Moore, James B Murray, Christopher J Northfield, Charles Parry, Rachel Parsons, Stephen D Roughley, Terry Shaw, Heather Simmonite, Stephen Stokes, Allan Surgenor, Emma Stefaniak, Alan Robertson, Yikang Wang, Paul Webb, Neil Whitehead, Mike Wood
Libraries of nonpurified resorcinol amide derivatives were screened by surface plasmon resonance (SPR) to determine the binding dissociation constant (off-rate, kd) for compounds binding to the pyruvate dehydrogenase kinase (PDHK) enzyme. Parallel off-rate measurements against HSP90 and application of structure-based drug design enabled rapid hit to lead progression in a program to identify pan-isoform ATP-competitive inhibitors of PDHK. Lead optimization identified selective sub-100-nM inhibitors of the enzyme which significantly reduced phosphorylation of the E1α subunit in the PC3 cancer cell line in vitro...
February 15, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28197544/plasticity-in-brainstem-mechanisms-of-pain-modulation-by-nicotinic-acetylcholine-receptors-in-the-rat
#13
Francis J Jareczek, Stephanie R White, Donna L Hammond
Individuals with chronic pain may be driven to smoke more because the analgesic efficacy of nicotine diminishes. To determine whether persistent pain diminishes the actions of a nicotinic acetylcholine receptor (nAChR) agonist in pain modulatory pathways, we examined the effects of epibatidine in the rostral ventromedial medulla (RVM) of rats with and without inflammatory injury induced by intraplantar injection of complete Freund's adjuvant (CFA). In uninjured rats, epibatidine produced a dose-dependent antinociception that was completely blocked by dihydro-β-erythroidine (DHβE; α4β2 antagonist) and partially blocked by methyllycaconitine (MLA; α7 antagonist)...
January 2017: ENeuro
https://www.readbyqxmd.com/read/28197078/redundant-postsynaptic-functions-of-syncams-1-3-during-synapse-formation
#14
Daniel K Fowler, James H Peters, Carly Williams, Philip Washbourne
Investigating the roles of synaptogenic adhesion molecules during synapse formation has proven challenging, often due to compensatory functions between additional family members. The synaptic cell adhesion molecules 1-3 (SynCAM1-3) are expressed both pre- and postsynaptically, share highly homologous domains and are synaptogenic when ectopically presented to neurons; yet their endogenous functions during synaptogenesis are unclear. Here we report that SynCAM1-3 are functionally redundant and collectively necessary for synapse formation in cultured hippocampal neurons...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28196872/muc16-regulates-tspyl5-for-lung-cancer-cell-growth-and-chemoresistance-by-suppressing-p53
#15
Imayavaramban Lakshmanan, Shireen Salfity, Parthasarathy Seshacharyulu, Satyanarayana Rachagani, Abigail Thomas, Srustidhar Das, Prabin D Majhi, Rama Krishna Nimmakayala, Raghupathy Vengoji, Subodh M Lele, Moorthy P Ponnusamy, Surinder K Batra, Apar Kishor Ganti
PURPOSE: MUC16, a tumor biomarker and cell surface associated mucin, is overexpressed in various cancers; however, its role in lung cancer pathogenesis is unknown. Here, we have explored the mechanistic role of MUC16 in lung cancer. EXPERIMENTAL DESIGN: To identify the functional role of MUC16, stable knockdown was carried in lung cancer cells with two different shRNAs. Clinical significance of MUC16 was evaluated in lung cancer patient's tissues using IHC. We have generated genetically engineered mouse model (KrasG12D; AdCre) to evaluate the preclinical significance of MUC16...
February 14, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28196816/bone-marrow-derived-microrna-223-works-as-an-endocrine-genetic-signal-in-vascular-endothelial-cells-and-participates-in-vascular-injury-from-kawasaki-disease
#16
Maoping Chu, Rongzhou Wu, Shanshan Qin, Wenfeng Hua, Zhen Shan, Xing Rong, Jingjing Zeng, Lanlan Hong, Yeying Sun, Ying Liu, Wen Li, Shenming Wang, Chunxiang Zhang
BACKGROUND: Kawasaki disease (KD) is now the most common cause of acquired cardiac disease in children due to permanent coronary artery damage with unknown etiology. The study sought to determine the role of blood microRNA miR-223 in KD and KD-induced injuries in vascular endothelial cells (ECs) as well as the mechanisms involved. METHODS AND RESULTS: MicroRNA profiles in serum from patients with KD and from healthy controls were assessed by microarray analysis...
February 14, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28195410/design-of-na-selective-fluorescent-probes-a-systematic-study-of-the-na-complex-stability-and-the-na-k-selectivity-in-acetonitrile-and-water
#17
Hans-Jürgen Holdt
Overall, there is a tremendous demand for highly Na+-selective fluoroionophores to monitor the top analyte Na+ in life science. Herein, we report on a systematic route to develop highly Na+/K+ selective fluorescent probes. Thus, we synthesized a set of fluoroionophores to investigate the Na+/K+ selectivity and Na+-complex stability in CH3CN and H2O. These Na+-probes bearing different 15-crown-5 moieties to bind Na+ stronger than K+. Further, we found for the N-(o-methoxyphenyl)aza-15-crown-5 substituted fluoroionophores 2, 8 and 9 (see Scheme 1) in H2O an enhanced Na+-complex stability in the following order 8 > 2 > 9 and an increased Na+/K+ selectivity in the reverse order 9 > 2 > 8...
February 14, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28194973/implications-for-the-light-driven-chloride-ion-transport-mechanism-of-nonlabens-marinus-rhodopsin-3-by-its-photochemical-characteristics
#18
Takashi Tsukamoto, Susumu Yoshizawa, Takashi Kikukawa, Makoto Demura, Yuki Sudo
Several new retinal-based photoreceptor proteins that act as light-driven electrogenic halide ion pumps have recently been discovered. Some of them, called "NTQ" rhodopsins, contain a conserved Asn-Thr-Gln motif in the 3(rd) or C-helix. In this study, we investigated the photochemical characteristics of a NTQ rhodopsin, Nonlabens marinus rhodopsin 3 (NM-R3), which was discovered in the N. marinus S1-08(T) strain, using static and time-resolved spectroscopic techniques. We demonstrate that NM-R3 binds a Cl(-) in the vicinity of the retinal chromophore accompanied by a spectral blue shift from 568 nm in the absence of Cl(-) to 534 nm in the presence of Cl(-)...
February 14, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28194744/heterogeneous-expression-of-dnak-gene-from-alicyclobacillus-acidoterrestris-improves-the-resistance-of-escherichia-coli-against-heat-and-acid-stress
#19
Xixi Xu, Lingxia Jiao, Xin Feng, Junjian Ran, Xinhong Liang, Ruixiang Zhao
Alicyclobacillus acidoterrestris, an acidophilic and thermophilic bacteria, is an important microbial resource for stress resistance genes screening. In this study, DnaK gene from A. acidoterrestris was subcloned to construct the recombinant plasmid pET28a-DnaK. The successful construction of the plasmid was verified by double-enzyme digestion and sequencing analysis. The recombinant plasmid was transformed into Escherichia coli BL21 and isopropy-β-D-thiogalactoside (IPTG) was used to induce recombinant E...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28194263/comparison-of-lymphocyte-dna-damage-levels-and-total-antioxidant-capacity-in-korean-and-american-diet
#20
Min Young Lee, Hyun A Kim, Myung Hee Kang
BACKGROUND/OBJECTIVE: This study aims to measure the in vitro antioxidant capacity of Korean diet (KD) with American diet (AD) as a control group and to examine the ex vivo DNA damage reduction effect on human lymphocytes. MATERIALS/METHODS: The KD applied in this study is the standard one-week meals for Koreans (2,000 kcal/day) suggested by 2010 Dietary Reference Intakes for Koreans. The AD, which is the control group, is a one-week menu (2,000 kcal/day) that consists of foods that Americans would commonly take in according to the National Health and Nutrition Examination Survey...
February 2017: Nutrition Research and Practice
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