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https://www.readbyqxmd.com/read/28213497/mitochondrial-damage-elicits-a-tcdd-inducible-poly-adp-ribose-polymerase-mediated-antiviral-response
#1
Tatsuya Kozaki, Jun Komano, Daiki Kanbayashi, Michihiro Takahama, Takuma Misawa, Takashi Satoh, Osamu Takeuchi, Taro Kawai, Shigeomi Shimizu, Yoshiharu Matsuura, Shizuo Akira, Tatsuya Saitoh
The innate immune system senses RNA viruses by pattern recognition receptors (PRRs) and protects the host from virus infection. PRRs mediate the production of immune modulatory factors and direct the elimination of RNA viruses. Here, we show a unique PRR that mediates antiviral response. Tetrachlorodibenzo-p-dioxin (TCDD)-inducible poly(ADP ribose) polymerase (TIPARP), a Cysteine3 Histidine (CCCH)-type zinc finger-containing protein, binds to Sindbis virus (SINV) RNA via its zinc finger domain and recruits an exosome to induce viral RNA degradation...
February 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28212040/synthesis-and-speciation-dependent-properties-of-a-multimetallic-model-complex-of-nisod-that-exhibits-unique-hydrogen-bonding
#2
Ramsey A Steiner, Stephen P Dzul, Timothy L Stemmler, Todd C Harrop
The complex Na3[{Ni(II)(nmp)}3S3BTA(alk))] (1) (nmp(2-) = deprotonated form of N-(2-mercaptoethyl)picolinamide; H3S3BTA(alk) = N(1),N(3),N(5)-tris(2-mercaptoethyl)benzene-1,3,5-tricarboxamide, where H = dissociable protons), supported by the thiolate-benzenetricarboxamide scaffold (S3BTA(alk)), has been synthesized as a trimetallic model of nickel-containing superoxide dismutase (NiSOD). X-ray absorption spectroscopy (XAS) and (1)H NMR measurements on 1 indicate that the Ni(II) centers are square-planar with N2S2 coordination, and Ni-N and Ni-S distances of 1...
February 17, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28211872/rictor-mtorc2-deficiency-enhances-keratinocyte-stress-tolerance-via-mitohormesis
#3
Beatrice Tassone, Stefania Saoncella, Francesco Neri, Ugo Ala, Davide Brusa, Mark A Magnuson, Paolo Provero, Salvatore Oliviero, Chiara Riganti, Enzo Calautti
How metabolic pathways required for epidermal tissue growth and remodeling influence the ability of keratinocytes to survive stressful conditions is still largely unknown. The mechanistic target of rapamycin complex 2 (mTORC2) regulates growth and metabolism of several tissues, but its functions in epidermal cells are poorly defined. Rictor is an adaptor protein essential for mTORC2 activity. To explore the roles of mTORC2 in the epidermis, we have conditionally deleted rictor in mice via K14-Cre-mediated homologous recombination and found that its deficiency causes moderate tissue hypoplasia, reduced keratinocyte proliferation and attenuated hyperplastic response to TPA...
February 17, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/28209627/characterization-of-a-blood-spot-creatine-kinase-skeletal-muscle-isoform-immunoassay-for-high-throughput-newborn-screening-of-duchenne-muscular-dystrophy
#4
Stuart J Moat, Teemu Korpimäki, Petra Furu, Harri Hakala, Hanna Polari, Liisa Meriö, Pauliina Mäkinen, Ian Weeks
BACKGROUND: Duchenne muscular dystrophy (DMD) is a progressive, lethal X-linked neuromuscular disorder with an average worldwide incidence of 1:5000. Blood spot creatine kinase (CK) enzyme assays previously used in newborn screening programs for DMD are nonspecific because measured CK enzyme activity is attributable to 3 isoenzyme forms of CK (CK-MM, CK-MB, and CK-BB) and it is the CK-MM isoform that is found predominantly in skeletal muscle. CK-MM is increased in boys with DMD owing to muscle damage...
February 16, 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/28208713/effects-of-an-encapsulated-fruit-and-vegetable-juice-concentrate-on-obesity-induced-systemic-inflammation-a-randomised-controlled-trial
#5
Evan J Williams, Katherine J Baines, Bronwyn S Berthon, Lisa G Wood
Phytochemicals from fruit and vegetables reduce systemic inflammation. This study examined the effects of an encapsulated fruit and vegetable (F&V) juice concentrate on systemic inflammation and other risk factors for chronic disease in overweight and obese adults. A double-blinded, parallel, randomized placebo-controlled trial was conducted in 56 adults aged ≥40 years with a body mass index (BMI) ≥28 kg/m². Before and after eight weeks daily treatment with six capsules of F&V juice concentrate or placebo, peripheral blood gene expression (microarray, quantitative polymerase chain reaction (qPCR)), plasma tumour necrosis factor (TNF)α (enzyme-linked immunosorbent assay (ELISA)), body composition (Dual-energy X-ray absorptiometry (DEXA)) and lipid profiles were assessed...
February 8, 2017: Nutrients
https://www.readbyqxmd.com/read/28207244/terminal-titanyl-complexes-of-tri-and-tetrametaphosphate-synthesis-structures-and-reactivity-with-hydrogen-peroxide
#6
Julia M Stauber, Christopher C Cummins
The synthesis and characterization of tri- and tetrametaphosphate titanium(IV) oxo and peroxo complexes is described. Addition of 0.5 equiv of [OTi(acac)2]2 to dihydrogen tetrametaphosphate ([P4O12H2](2-)) and monohydrogen trimetaphosphate ([P3O9H](2-)) provided a bis(μ2,κ(2),κ(2)) tetrametaphosphate titanyl dimer, [OTiP4O12]2(4-) (1; 70% yield), and a trimetaphosphate titanyl acetylacetonate complex, [OTiP3O9(acac)](2-) (2; 59% yield). Both 1 and 2 have been structurally characterized, crystallizing in the triclinic P1̅ and monoclinic P21 space groups, respectively...
February 16, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28206762/influence-of-lafeo3-surface-termination-on-water-reactivity
#7
Kelsey A Stoerzinger, Ryan B Comes, Steven R Spurgeon, Suntharampillai Thevuthasan, Kyuwook Ihm, Ethan J Crumlin, Scott A Chambers
The polarity of oxide surfaces can dramatically impact their surface reactivity, in particular with polar molecules such as water. The surface species that result from this interaction change the oxide electronic structure and chemical reactivity in applications such as photoelectrochemistry, but are challenging to probe experimentally. Here we report a detailed study of the surface chemistry and electronic structure of the perovskite LaFeO3 in humid conditions using ambient pressure X-ray photoelectron spectroscopy...
February 16, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28206681/hepatitis-b-reactivation-in-patients-with-chronic-hepatitis-c-undergoing-anti-viral-therapy-with-an-interferon-free-regimen
#8
M-C Londoño, S Lens, Z Mariño, M Bonacci, X Ariza, T Broquetas, A Pla, C Bartres, M V Adriani, S Rodríguez-Tajes, J Costa, J A Carrión, S Pérez-Del-Pulgar, X Forns
BACKGROUND: A few cases of hepatitis B virus (HBV) reactivation during anti-viral therapy against hepatitis C (HCV) have been reported. However, the information regarding the real impact of this phenomenon is scarce. AIM: To evaluate the risk of HBV reactivation during anti-viral therapy against HCV with an interferon-free regimen with direct-acting anti-virals (DAAs). METHODS: Observational and prospective study of 352 patients receiving DAAs therapy between September 2015 and May 2016...
February 16, 2017: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28205176/determining-the-topology-of-membrane-bound-proteins-using-pegylation
#9
Vicky Howe, Andrew J Brown
Biochemical methods can help elucidate the membrane topology of hydrophobic membrane proteins where X-ray crystallography is difficult or impractical, providing important structural data. Here, we describe the method of PEGylation, which uses a cysteine-reactive molecule, maleimide polyethylene glycol (mPEG), to determine the cytosolic accessibility of introduced cysteine residues. This accessibility is visualized using Western blotting to detect a band shift that indicates cysteine labeling by mPEG. Using scanning cysteine mutagenesis, followed by PEGylation, one can map the accessibility of the introduced cysteines, hence inferring the membrane topology of the protein...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28204825/morroniside-protects-sk-n-sh-human-neuroblastoma-cells-against-h2o2-induced-damage
#10
Jing-Xing Zhang, Rui Wang, Jin Xi, Lin Shen, An-You Zhu, Qi Qi, Qi-Yi Wang, Lun-Jun Zhang, Feng-Chao Wang, He-Zuo Lü, Jian-Guo Hu
Oxidative stress-induced cell injury has been linked to the pathogenesis of neurodegenerative disorders such as spinal cord injury, Parkinson's disease, and multiple sclerosis. Morroniside is an antioxidant derived from the Chinese herb Shan-Zhu-Yu. The present study investigated the neuroprotective effect of morroniside against hydrogen peroxide (H2O2)-induced cell death in SK-N-SH human neuroblastoma cells. H2O2 increased cell apoptosis, as determined by flow cytometry and Hoechst 33342 staining. This effect was reversed by pretreatment with morroniside at concentrations of 1-100 µM...
February 8, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28199142/dc-stamp-is-an-osteoclast-fusogen-engaged-in-periodontal-bone-resorption
#11
W Wisitrasameewong, M Kajiya, A Movila, S Rittling, T Ishii, M Suzuki, S Matsuda, Y Mazda, M R Torruella, M M Azuma, K Egashira, M O Freire, H Sasaki, C Y Wang, X Han, M A Taubman, T Kawai
Dendritic cell-specific transmembrane protein (DC-STAMP) plays a key role in the induction of osteoclast (OC) cell fusion, as well as DC-mediated immune regulation. While DC-STAMP gene expression is upregulated in the gingival tissue with periodontitis, its pathophysiological roles in periodontitis remain unclear. To evaluate the effects of DC-STAMP in periodontitis, anti-DC-STAMP-monoclonal antibody (mAb) was tested in a mouse model of ligature-induced periodontitis ( n = 6-7/group) where Pasteurella pneumotropica ( Pp)-reactive immune response activated T cells to produce receptor activator of nuclear factor kappa-B ligand (RANKL), which, in turn, promotes the periodontal bone loss via upregulation of osteoclastogenesis...
February 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28199104/cobalt-catalyzed-1-1-diboration-of-terminal-alkynes-scope-mechanism-and-synthetic-applications
#12
Simon Krautwald, Mate J Bezdek, Paul J Chirik
A cobalt-catalyzed method for the 1,1-diboration of terminal alkynes with bis(pinacolato)diboron (B2Pin2) is described. The reaction proceeds efficiently at 23 °C with excellent 1,1-selectivity and broad functional group tolerance. With the unsymmetrical diboron reagent PinB-BDan (Dan = naphthalene-1,8-diaminato), stereoselective 1,1-diboration provided products with two boron substituents that exhibit differential reactivity. One example prepared by diboration of 1-octyne was crystallized and its stereochemistry established by X-ray crystallography...
February 15, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28198899/repeatable-deep-tissue-activation-of-persistent-luminescent-nanoparticles-by-soft-x-ray-for-high-sensitivity-long-term-in-vivo-bioimaging
#13
Liang Song, Xia-Hui Lin, Xiao-Rong Song, Shan Chen, Xiao-Feng Chen, Juan Li, Huang-Hao Yang
Persistent luminescent nanoparticles (PLNPs) have emerged as important nanomaterials for biological imaging as a result of complete avoidance of tissue auto-fluorescence. However, the imaging sensitivity and long-term in vivo imaging are still limited due to the persistent luminescence that is rapidly decayed in vivo after an ex vivo excitation. To address this limitation, in vivo activation of PLNPs is highly desired. Herein, we present a new strategy for the activation of PLNPs (SrAl2O4:Eu(2+)) by using soft X-ray excitation...
February 15, 2017: Nanoscale
https://www.readbyqxmd.com/read/28195711/impact-of-mn-ii-manganese-oxide-reactions-on-ni-and-zn-speciation
#14
Margaret A G Hinkle, Katherine G Dye, Jeffrey G Catalano
Layered Mn oxide minerals (phyllomanganates) often control trace metal fate in natural systems. The strong uptake of metals such as Ni and Zn by phyllomanganates results from adsorption on or incorporation into vacancy sites. Mn(II) also binds to vacancies and subsequent comproportionation with structural Mn(IV) may alter sheet structures by forming larger and distorted Mn(III)O6 octahedra. Such Mn(II)-phyllomanganate reactions may thus alter metal uptake by blocking key reactive sites. Here we investigate the effect of Mn(II) on Ni and Zn binding to phyllomanganates of varying initial vacancy content (δ-MnO2, hexagonal birnessite, and triclinic birnessite) at pH 4 and 7 under anaerobic conditions...
February 14, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28195406/synthesis-biological-evaluations-and-molecular-docking-studies-on-dna-binding-interaction-of-platinum-ii-rollover-complexes-containing-phosphorus-donor-ligands
#15
Masood Fereidoonnezhad, Maryam Niazi, Mahnaz Shahmohammadi Beni, Shima Mohammadi, Zeinab Faghih, Zahra Faghih, Hamid R Shahsavari
A series of cyclometalated rollover complexes [PtMe(κ²N,C-bipyO-H)(L)], 2a-2c, bipyO-H = cyclometalated 2,2'-bipyridine N-oxide, L = PCy₃ (2a), PPh₂py (2-(diphenylphosphino)pyridine, 2b), P(OPh)₃ (2c), was synthesized by reacting of complex [PtMe(κ²N,C-bipyO-H)(SMe₂)], 1, with various monodentate phosphine and phosphite ligands. These complexes were characterized by means of NMR spectroscopy and the structures of 2a confirmed by single-crystal X-ray diffraction. 1 was treated with bis(diphenylphosphino)methane (dppm) in a 1 : 1 ratio to give corresponding complex [PtMe(κ²N,C-bipyO-H)(η¹P-dppm)], 3b, in which dppm ligand acts as a monodentate pendant ligand...
February 14, 2017: ChemMedChem
https://www.readbyqxmd.com/read/28194866/pseudomonas-protegens-cs1-from-the-lemon-phyllosphere-as-a-candidate-for-citrus-canker-biocontrol-agent
#16
G Michavila, C Adler, P R De Gregorio, M J Lami, M C Caram Di Santo, A M Zenoff, R E de Cristobal, P A Vincent
Citrus canker is a worldwide-distributed disease caused by Xanthomonas citri subsp. citri. One of the most used strategies to control the disease is centered on copper-based compounds that cause environmental problems. Therefore, it is of interest to develop new strategies to manage the disease. Previously, we reported the ability of the siderophore pyochelin, produced by the opportunistic human pathogen Pseudomonas aeruginosa, to inhibit in vitro several bacterial species including X. citri subsp. citri. The action mechanism, addressed with the model bacterium Escherichia coli, was connected to the generation of reactive oxygen species...
February 14, 2017: Plant Biology
https://www.readbyqxmd.com/read/28193316/polydatin-improves-the-developmental-competence-of-bovine-embryos-in-vitro-via-induction-of-sirtuin-1-sirt1
#17
Imran Khan, Sung Woo Kim, Kyung-Lim Lee, Seok-Hwan Song, Ayman Mesalam, M M R Chowdhury, Zia Uddin, Ki Hun Park, Il-Keun Kong
The aim of the present study was to investigate the beneficial effect of polydatin (PD), the glycoside form of resveratrol, on embryo development in vitro. Oocytes were aspirated from ovaries of Korean Hanwoo cows and cultured until Day 8 in a humidified atmosphere of 5% CO2 in air at 38.5°C. Protein and gene expression levels were determined through confocal microscopy and reverse transcription-polymerase chain reaction respectively, whereas the number of total and apoptotic cells in Day 8 blastocysts was determined using Hoechst 33342 staining and terminal deoxyribonucleotidyl transferase-mediated dUTP-digoxigenin nick end-labelling...
February 14, 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/28192365/zero-valent-metal-loaded-silica-nanoparticles-for-the-removal-of-tnt-from-water
#18
Harsha Mangal, Amit Saxena, Nivedita Shukla, P K Rai, A S Rawat, Vivek Kumar, Vatsana Gupta, Monika Datta
Silica nanoparticles with a surface area of 673.60 m(2)/g and particle size of 8-12 nm were prepared using aerogel process (AP) followed by super critical drying. Zero valent Fe, Co, Pt, and bimetallic Fe/Pt and Fe/Co were loaded using an incipient wetness impregnation technique and subsequent reduction. Scanning electron microscopy-energy dispersive X-ray (SEM-EDX) and transmission electron microscopy-energy dispersive X-ray (TEM-EDX) characterizations indicated fine dispersion of iron on AP-SiO2 +Fe system...
February 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28191573/naybf4-nanoparticles-as-near-infrared-light-excited-inorganic-photosensitizers-for-deep-penetration-in-photodynamic-therapy
#19
J Y Zhang, S Chen, P Wang, D J Jiang, D X Ban, N Z Zhong, G C Jiang, H Li, Z Hu, J R Xiao, Z G Zhang, W W Cao
Photodynamic therapy (PDT) is a non-invasive therapy with many advantages over other therapeutic methods, but it is restricted to treat superficial cancers due to the shallow tissue penetration of visible light. The biological window in the near infrared region (NIR) offers hope to extend the penetration depth, but there is no natural NIR excited photosensitizer. Here, we report a novel photosensitizer: NaYbF4 nanoparticles (NPs). By using a 1,3-diphenylisobenzofuran (DPBF) sensor, we show that the Yb(3+) ions can absorb the NIR light and transfer energy directly to oxygen to generate reactive oxygen species (ROS)...
February 13, 2017: Nanoscale
https://www.readbyqxmd.com/read/28189114/nano-scale-synthesis-of-the-complex-silicate-minerals-forsterite-and-enstatite
#20
Lawrence M Anovitz, Adam J Rondinone, Lindsay Sochalski-Kolbus, Jörgen Rosenqvist, Michael C Cheshire
Olivine is a relatively common family of silicate minerals in many terrestrial and extraterrestrial environments, and is also useful as a refractory ceramic. A capability to synthesize fine particles of olivine will enable additional studies on surface reactivity under geologically relevant conditions. This paper presents a method for the synthesis of nanocrystalline samples of the magnesium end-member, forsterite (Mg2SiO4) in relatively large batches (15-20g) using a sol-gel/surfactant approach. Magnesium methoxide and tetraethylorthosilicate (TEOS) are refluxed in a toluene/methanol mixture using dodecylamine as a surfactant and tert-butyl amine and water as hydrolysis agents...
January 18, 2017: Journal of Colloid and Interface Science
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