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Sella Kim, Ji-Hye Lee, Jong Hyeon Seok, Yi-Ho Park, Sang Won Jung, Art E Cho, Cheolju Lee, Mi Sook Chung, Kyung Hyun Kim
Iron and oxygen chemistry is mediated by iron proteins for many biological functions. Carboxylate-bridged diiron enzymes including ferritin have in common the mechanism of oxygen activation via peroxodiferric intermediates. However, the route for iron uptake and the structural identification of intermediates still remain incomplete. The 4-fold symmetry channel of Helicobacter pylori ferritin (Hpf) was previously proposed as the iron uptake route in eubacteria, but the amino acid residues at the 4-fold channel are not highly conserved...
October 21, 2016: Journal of Molecular Biology
Salah-Eddin Al-Batran, Ralf D Hofheinz, Claudia Pauligk, Hans-Georg Kopp, Georg Martin Haag, Kim Barbara Luley, Johannes Meiler, Nils Homann, Sylvie Lorenzen, Harald Schmalenberg, Stephan Probst, Michael Koenigsmann, Matthias Egger, Nicole Prasnikar, Karel Caca, Jörg Trojan, Uwe M Martens, Andreas Block, Wolfgang Fischbach, Rolf Mahlberg, Michael Clemens, Gerald Illerhaus, Katja Zirlik, Dirk M Behringer, Wolff Schmiegel, Michael Pohl, Michael Heike, Ulrich Ronellenfitsch, Martin Schuler, Wolf O Bechstein, Alfred Königsrainer, Timo Gaiser, Peter Schirmacher, Wael Hozaeel, Alexander Reichart, Thorsten O Goetze, Mark Sievert, Elke Jäger, Stefan Mönig, Andrea Tannapfel
BACKGROUND: Docetaxel-based chemotherapy is effective in metastatic gastric and gastro-oesophageal junction adenocarcinoma, but has not yet been evaluated in the context of resectable patients. Here we report findings from the phase 2 part of the phase 2/3 FLOT4 trial, which compared histopathological regression in patients treated with a docetaxel-based triplet chemotherapy versus an anthracycline-based triplet chemotherapy before surgical resection. METHODS: In this randomised, open-label, phase 2/3 study, eligible participants were recruited from 28 German oncology centres...
October 21, 2016: Lancet Oncology
Agne Ulyte, Nomeda Valeviciene, Darius Palionis, Simona Kundrotaite, Algirdas Tamosiunas
OBJECTIVE: In cardiac magnetic resonance imaging (CMR), incidental pathological findings are frequently found outside the investigated cardiovascular system. Some of these findings might have clinical implications. The aim of this study was to determine the prevalence of incidental extracardiac findings (ECF) in CMR and their clinical significance. METHODS: A total of 4165 CMR reports from 2009-2012 were retrospectively reviewed for ECF. Two hundred-twenty reports with ECF were found...
September 22, 2016: Hellenic Journal of Cardiology: HJC, Hellēnikē Kardiologikē Epitheōrēsē
Richard A Hawkins, Juan R Viña
A facilitative transport system exists on the blood-brain barrier (BBB) that has been tacitly assumed to be a path for glutamate entry to the brain. However, glutamate is a non-essential amino acid whose brain content is much greater than plasma, and studies in vivo show that glutamate does not enter the brain in appreciable quantities except in those small regions with fenestrated capillaries (circumventricular organs). The situation became understandable when luminal (blood facing) and abluminal (brain facing) membranes were isolated and studied separately...
October 8, 2016: Biology
Soledad Chamorro, Daniela López, Pablina Brito, Mayra Jarpa, Benjamin Piña, Gladys Vidal
The implementation of elemental chlorine-free (ECF) bleaching methods has drastically reduced the aquatic toxicity of Kraft mill effluents during the last decade. However, the residual toxicity of Kraft mill effluents is still a potential concern for the environment, even when subjected to secondary wastewater treatment. The aim of this study is characterize potential sublethal effects of ECF Kraft mill effluents using Daphnia magna as model species. D. magna exposed towards increasing concentration of ECF Kraft mill effluent showed a significant, dose-dependent reduction in feeding...
October 4, 2016: Bulletin of Environmental Contamination and Toxicology
Zhaokun Xiong, Jinyan Cao, Dan Yang, Bo Lai, Ping Yang
A coagulation-flocculation as pre-treatment combined with mFe/Cu/O3 (CF-mFe/Cu/O3) process was developed to degrade the pollutants in automobile coating wastewater (ACW). In coagulation-flocculation (CF) process, high turbidity removal efficiency (97.1%) and low COD removal efficiency (10.5%) were obtained under the optimal conditions using Al2(SO4)3·18H2O and CaO. The effluent of CF process (ECF) was further disposed by mFe/Cu/O3 process, and its key operating parameters were optimized by batch experiments...
January 2017: Chemosphere
Satoshi Matsuoka, Takahiro Seki, Kouji Matsumoto, Hiroshi Hara
Glucolipids in Bacillus subtilis are synthesized by UgtP processively transferring glucose from UDP-glucose to diacylglycerol. Here we conclude that the abnormal morphology of a ugtP mutant is caused by lack of glucolipids, since the same morphology arises after abolition of glucolipid production by disruption of pgcA and gtaB, which are involved in UDP-glucose synthesis. Conversely, expression of a monoglucosyldiacylglycerol (MGlcDG) produced by 1,2-diacylglycerol 3-glucosyltransferase from Acholeplasma laidlawii (alMGS) almost completely suppressed the ugtP disruptant phenotype...
December 2016: Bioscience, Biotechnology, and Biochemistry
Janet Douglass, Patricia Graves, Susan Gordon
BACKGROUND: Measurements of tissue compressibility and extracellular fluid (ECF) are used to monitor progression of lymphedema, a chronic swelling of the subcutaneous tissue. Later stages of lymphedema are characterized by fibrotic induration in the subcutis and hyperkeratosis of the skin. Several devices are available to measure these changes, but previous reliability and validity studies have been conducted primarily on adult women with unilateral arm lymphedema using contralateral limbs as controls...
September 27, 2016: Lymphatic Research and Biology
Ahmet Yildirim, Jin Zhang, Sergio Manzetti, David van der Spoel
A number of cases around the world have been reported where animals were found dead or dying with symptoms resembling a thiamine (vitamin B) deficiency, and for some of these, a link to pollutants has been suggested. Here, we investigate whether biomolecules involved in thiamin binding and transport could be blocked by a range of different pollutants. We used in silico docking of five compound classes (25 compounds in total) to each of five targets (prion protein, ECF-type ABC transporter, thi-box riboswitch receptor, thiamin pyrophosphokinase, and YKoF protein) and subsequently performed molecular dynamics (MD) simulations to assess the stability of the complexes...
October 17, 2016: Chemical Research in Toxicology
Kotaro Suehiro, Noriyasu Morikage, Osamu Yamashita, Takasuke Harada, Koshiro Ueda, Makoto Samura, Yuya Tanaka, Yuriko Takeuchi, Kaori Nakamura, Kimikazu Hamano
BACKGROUND: This study aimed to determine the specific fluid distribution pattern in legs with lymphedema (LE) in comparison to normal legs and legs with venous edema (VE) using bioelectrical impedance analysis (BIA). METHODS AND RESULTS: BIA was performed in 47 patients with lymphedema (LE; 63 legs), 33 patients with venous edema (VE; 60 legs), and 33 normal subjects (N; 66 legs). The ratio of intracellular fluid (ICF) resistance (Ri) to extracellular fluid (ECF) resistance (Re) of a whole leg normalized to the right arm (Ri/Re leg), a surrogate parameter for ECF/ICF, and the Ri/Re of the thigh and calf without normalization (Ri/Re thigh, Ri/Re calf, respectively) were obtained...
September 2016: Lymphatic Research and Biology
Jessica L Hastie, Kyle B Williams, Lindsey L Bohr, Jon C Houtman, Lokesh Gakhar, Craig D Ellermeier
σ factors provide RNA polymerase with promoter specificity in bacteria. Some σ factors require activation in order to interact with RNA polymerase and transcribe target genes. The Extra-Cytoplasmic Function (ECF) σ factor, σV, is encoded by several Gram-positive bacteria and is specifically activated by lysozyme. This activation requires the proteolytic destruction of the anti-σ factor RsiV via a process of regulated intramembrane proteolysis (RIP). In many cases proteases that cleave at site-1 are thought to directly sense a signal and initiate the RIP process...
September 2016: PLoS Genetics
Cassandra L Olds, Stephen Mwaura, David O Odongo, Glen A Scoles, Richard Bishop, Claudia Daubenberger
BACKGROUND: Rhipicephalus appendiculatus is the primary vector of Theileria parva, the etiological agent of East Coast fever (ECF), a devastating disease of cattle in sub-Saharan Africa. We hypothesized that a vaccine targeting tick proteins that are involved in attachment and feeding might affect feeding success and possibly reduce tick-borne transmission of T. parva. Here we report the evaluation of a multivalent vaccine cocktail of tick antigens for their ability to reduce R. appendiculatus feeding success and possibly reduce tick-transmission of T...
2016: Parasites & Vectors
Satoru Umino, Hideaki Takahashi, Akihiro Morita
In a recent work, we developed a method [H. Takahashi et al., J. Chem. Phys. 143, 084104 (2015)] referred to as exchange-core function (ECF) approach, to compute exchange repulsion Eex between solute and solvent in the framework of the quantum mechanical (QM)/molecular mechanical (MM) method. The ECF, represented with a Slater function, plays an essential role in determining Eex on the basis of the overlap model. In the work of Takahashi et al. [J. Chem. Phys. 143, 084104 (2015)], it was demonstrated that our approach is successful in computing the hydrogen bond energies of minimal QM/MM systems including a cationic QM solute...
August 28, 2016: Journal of Chemical Physics
Nattawin Chawaloesphonsiya, Chayanin Prommajun, Kritchart Wongwailikhit, Pisut Painmanakul
Separation of nanoscale oil droplets in the cutting-oil emulsion by electrocoagulation-flotation (ECF) was carried out in a bubble column reactor (BCR) and an external-loop airlift reactor (ALR). Under the batch operation, aluminium electrode provided the highest efficiency of 99% and required the shortest separating time compared to iron and graphite electrodes. The separation performance was also affected by the electrode gap and current density due to the amount of produced aluminium ions and turbulence by bubble motions...
September 1, 2016: Environmental Technology
Klaus W Beyenbach
In chemistry, the ratio of all dissolved solutes to the solution's volume yields the osmotic concentration. The present Review uses this chemical perspective to examine how insects deal with challenges to extracellular fluid (ECF) volume, solute content and osmotic concentration (pressure). Solute/volume plots of the ECF (hemolymph) reveal that insects tolerate large changes in all three of these ECF variables. Challenges beyond those tolerances may be 'corrected' or 'compensated'. While a correction simply reverses the challenge, compensation accommodates the challenge with changes in the other two variables...
September 1, 2016: Journal of Experimental Biology
Sarah J Valle, Nayef Alzahrani, Saleh Alzahrani, Thamer Bin Traiki, Winston Liauw, David L Morris
BACKGROUND: Cytoreductive surgery and hyperthermic intraperitoneal chemotherapy (CRS/HIPEC) is an effective treatment for peritoneal carcinomatosis (PC) from multiple origins, however is associated with increased complications compared to conventional gastrointestinal surgery. The aetiology of enterocutaneous fistulas (ECF) in most cases is a result of various contributing factors and therefore remains a major clinical problem, occurring in 4-34% of patients post-CRS. The aim of this study was to analyze the incidence and outcome of ECF following CRS/HIPEC...
September 2016: Surgical Oncology
Ashutosh Kumar Rai, Ashutosh Prakash Dubey, Santosh Kumar, Debashis Dutta, Mukti Nath Mishra, Bhupendra Narain Singh, Anil Kumar Tripathi
: Carotenoids constitute an important component of the defense system against photooxidative stress in bacteria. In Azospirillum brasilense Sp7, a nonphotosynthetic rhizobacterium, carotenoid synthesis is controlled by a pair of extracytoplasmic function sigma factors (RpoEs) and their cognate zinc-binding anti-sigma factors (ChrRs). Its genome harbors two copies of the gene encoding geranylgeranyl pyrophosphate synthase (CrtE), the first critical step in the carotenoid biosynthetic pathway in bacteria...
November 1, 2016: Journal of Bacteriology
Jose M Quesada, Joaquín R Otero-Asman, Karlijn C Bastiaansen, Cristina Civantos, María A Llamas
Gene regulation in bacteria is primarily controlled at the level of transcription initiation by modifying the affinity of the RNA polymerase (RNAP) for the promoter. This control often occurs through the substitution of the RNAP sigma (σ) subunit. Next to the primary σ factor, most bacteria contain a variable number of alternative σ factors of which the extracytoplasmic function group (σ(ECF)) is predominant. Pseudomonas aeruginosa contains nineteen σ(ECF), including the virulence regulator σ(VreI). σ(VreI) is encoded by the vreAIR operon, which also encodes a receptor-like protein (VreA) and an anti-σ factor (VreR)...
2016: Frontiers in Microbiology
C D Brandi, S Roche, S Bertone, M E Fratantoni
PURPOSE: To determine the incidence of enterocutaneous fistulas (ECFs) developed after elective incisional hernia (IH) repair using intraperitoneal uncoated polypropylene (PPE) mesh. METHODS: This is a retrospective descriptive study of a prospective cohort of patients undergoing elective IH repair using intraperitoneal uncoated PPE mesh at the Department of General Surgery of a high complexity University Hospital. RESULTS: Between January 1992 and December 2013, 695 IH repairs were performed using intraperitoneal uncoated PPE mesh...
August 13, 2016: Hernia: the Journal of Hernias and Abdominal Wall Surgery
Xiaofei Song, Yucheng Song, Yuan Yuan, Peng Zhang, Xuedong Zhang
BACKGROUND: Enterocutaneous fistula (ECF) poses a supreme challenge for the surgeons associated with abdominal sepsis, fluid electrolyte imbalance and undernutrition. Individual prognostic stratification is pivotal in the clinical management. Presepsin is a novel biomarker showing diagnostic and prognostic value in sepsis. We aimed to evaluate the prognostic value of presepsin in ECF. METHODS: Consecutive patients with ECF were enrolled if diagnosed as abdominal sepsis from June 2014 to June 2015...
September 2016: International Journal of Surgery
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