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David M Hallman, Marie Birk Jørgensen, Andreas Holtermann
AIMS: This study aimed to investigate the association between objectively measured physical activity at work and leisure and the intensity (mean level and time course) of neck-shoulder pain (NSP) over 12 months among male and female blue collar workers. METHODS: Data were obtained from 625 blue collar workers from the Danish cohort DPHACTO. Physical activity was measured objectively at baseline using accelerometers. The percentage of time spent in physical activity (walking, climbing stairs, running and cycling) was calculated for both work and leisure time...
May 2017: Scandinavian Journal of Public Health
Fereshteh Karimzadeh, Michal Opas
Calreticulin, a multifunctional endoplasmic reticulum resident protein, is required for TGF-β-induced epithelial-to-mesenchymal transition (EMT) and subsequent cardiomyogenesis. Using embryoid bodies (EBs) derived from calreticulin-null and wild-type (WT) embryonic stem cells (ESCs), we show that expression of EMT and cardiac differentiation markers is induced during differentiation of WT EBs. This induction is inhibited in the absence of calreticulin and can be mimicked by inhibiting TGF-β signaling in WT cells...
April 13, 2017: Stem Cell Reports
Shannon L Zandy, James M Doherty, Nathan D Wibisono, Rueben A Gonzales
Reversed-phase HPLC with derivatization using o-phthalaldehyde (OPA) and sulfite allows electrochemical detection of γ-aminobutyric acid (GABA) in microdialysis samples. However, OPA/sulfite derivatives have been reported to produce lower fluorescent yield than OPA derivatives using organic thiols as the nucleophile. To overcome this limitation we examined excitation and emission spectra, reaction time, pH, and concentration of reagents in the derivatization solution. Optimal detection parameters were determined as λex=220nm and λem=385nm for maximal fluorescence...
April 3, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
Wendy A Cooper, Prudence A Russell, Maya Cherian, Edwina E Duhig, David Godbolt, Peter J Jessup, Christine Khoo, Connull Leslie, Annabelle Mahar, David F Moffat, Vanathi Sivasubramaniam, Céline Faure, Alena Reznichenko, Amanda Grattan, Stephen B Fox
<br />Reliable and reproducible methods for identifying PD-L1 expression on tumor cells are necessary to identify responders to anti-PD-1 therapy. We tested the reproducibility of the assessment of PD-L1 expression in non-small cell lung cancer (NSCLC) tissue samples by pathologists.<br />Experimental Design: <br />NSCLC samples were stained with PD-L1 22C3 pharmDx™ kit using the Dako Autostainer Link 48 Platform. Two sample sets of 60 samples each were designed to assess inter- and intra-observer reproducibility considering 2 cut-points for positivity: 1% or 50% of PD-L1 stained tumor cells...
April 18, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
Hsuen-Wen Chang, Zih-Miao Lin, Min-Ju Wu, Li-Yu Wang, Yen-Hung Chow, Shih Sheng Jiang, Hui-Ju Ch'ang, Vincent Hs Chang
Developing lung cancer in mouse models that display similarities of both phenotype and genotype will undoubtedly provide further and better insights into lung tumor biology. Moreover, a high degree of pathophysiological similarity between lung tumors from mouse models and their human counterparts will make it possible to use these mouse models for preclinical tests. Ovine pulmonary adenocarcinomas (OPAs) present the same symptoms as adenocarcinomas in humans and are caused by a betaretrovirus. OPAs have served as an exquisite model of carcinogenesis for human lung adenocarcinomas...
2017: PloS One
J Mundry, J Lohrenz, M Betz
Up to 400 mW of near-IR (1370-1500 nm) femtosecond pulses are generated from an optical parametric amplifier directly driven by a Yb:fiber oscillator delivering 100 fs pulses at 1036 nm. The process is seeded by a stable supercontinuum obtained from a photonic crystal fiber. We use a single pass through a 3 mm, magnesium oxide-doped, periodically poled LiNbO<sub>3</sub> downconversion crystal to produce a near-IR pulse train with a remarkable power stability of 1.4% (RMS) during one hour. Tuning is achieved by the temperature and the poling period of the nonlinear crystal...
April 10, 2017: Applied Optics
Kiyoshi Kato, Kentaro Miyata, Valentin Petrov
We report new experimental results on the phase-matching properties of a BaGa<sub>4</sub>Se<sub>7</sub> crystal for harmonic generation of a Nd:YAG laser-pumped AgGaS<sub>2</sub> optical parametric oscillator (OPO) and a CO<sub>2</sub> laser in the 0.901-10.5910 μm range. In addition, we present new Sellmeier equations that provide a good reproduction of the present experimental results as well as the published data points for a Nd:YAG laser-pumped OPO and an optical parametric amplifier (OPA) in the 3...
April 10, 2017: Applied Optics
Salah Zangenah, Linda Björkhem-Bergman, Anna-Carin Norlin, Susanne Hansen, Lars Lindqvist, Birgitta Henriques-Normark, Peter Bergman
BACKGROUND: Patients with IgG-deficiency often suffer from repeated bacterial infections with S. pneumoniae. Since there is a lack of knowledge regarding whether IgG-deficient patients would benefit from conjugate pneumococcal vaccination, we set out to evaluate the effect of Prevnar13 vaccination in IgG1- and/or IgG2-deficient patients. METHOD: We designed a small pilot-study including IgG1- and/or IgG2-deficient patients (n=10) and age- and sex-matched healthy controls (n=10)...
May 9, 2017: Vaccine
Mohammad Amin Izadi, Rahman Nouroozi
The propagation length enhancement of surface plasmon polariton (SPP) waves could lead to practical applications. This Letter proposes the numerically verified phase-sensitive nonlinear χ<sup>(2)</sup>-based optical parametric amplification (OPA) for ultralong propagation of a SPP wave within an ultrawide bandwidth. The strong nonlinear interaction between the SPP mode and the hybrid guided mode, which limits the length enhancement, is mitigated in a silver-coated linearly chirped periodically poled lithium niobate planar waveguide via slowly phase-matched OPA...
April 15, 2017: Optics Letters
Johannes Trück, Amber Thompson, Begonia Morales-Aza, Elizabeth A Clutterbuck, Merryn Voysey, Ed Clarke, Matthew D Snape, Dominic F Kelly, Adam Finn, Andrew J Pollard
Pneumococcal protein-polysaccharide conjugate vaccines provide direct protection against Streptococcus pneumoniae through the induction of persistent anti-polysaccharide antibodies, and by priming for a rapid secondary antibody response. Memory B cells (BMEM) generated during an initial immune response are responsible for both the more rapid and quantitatively greater secondary antibody response and are also thought to contribute to the ongoing production of plasma cells providing long-term antibody persistence...
May 9, 2017: Vaccine
Adam Riba, Laszlo Deres, Krisztian Eros, Aliz Szabo, Klara Magyar, Balazs Sumegi, Kalman Toth, Robert Halmosi, Eszter Szabados
In addition to their anti-bacterial action, tetracyclines also have complex biological effects, including the modification of mitochondrial protein synthesis, metabolism and gene-expression. Long-term clinical studies have been performed using tetracyclines, without significant side effects. Previous studies demonstrated that doxycycline (DOX), a major tetracyclin antibiotic, exerted a protective effect in animal models of heart failure; however, its exact molecular mechanism is still unknown. Here, we provide the first evidence that DOX reduces oxidative stress-induced mitochondrial fragmentation and depolarization in H9c2 cardiomyocytes and beneficially alters the expression of Mfn-2, OPA-1 and Drp-1 -the main regulators of mitochondrial fusion and fission-in our isoproterenol (ISO)-induced heart failure model, ultimately decreasing the severity of heart failure...
2017: PloS One
Wenkai Li, Yanyan Li, Yi Xu, Xiaoyang Guo, Jun Lu, Pengfei Wang, Yuxin Leng
We present the design of a novel single-cycle infrared source tunable from 2 to 10 μm. We simulate the optical parametric amplification (OPA) in BBO and the difference frequency generation (DFG) in AGS based on coupled second-order three-wave nonlinear propagation equations. We combine this with the unidirectional pulse propagation equation, which models the generation of the initial supercontinuum seed in sapphire and the final self-compression in YAG, ZnS, and GaAs, respectively. The obtained results indicate that single-cycle pulses can be produced in a tunable range of 2 to 10 μm...
March 20, 2017: Optics Express
Martin Wünsche, Silvio Fuchs, Stefan Aull, Jan Nathanael, Max Möller, Christian Rödel, Gerhard G Paulus
A quasi-supercontinuum source in the extreme ultraviolet (XUV) is demonstrated using a table-top femtosecond laser and a tunable optical parametric amplifier (OPA) as a driver for high-harmonic generation (HHG). The harmonic radiation, which is usually a comb of odd multiples of the fundamental frequency, is generated by near-infrared (NIR) laser pulses from the OPA. A quasi-continuous XUV spectrum in the range of 30 to 100 eV is realized by averaging over multiple harmonic comb spectra with slightly different fundamental frequencies and thus different spectral spacing between the individual harmonics...
March 20, 2017: Optics Express
Han Wool Kim, Ji Hyen Lee, Hye Kyung Cho, Hyunju Lee, Ho Seong Seo, Soyoung Lee, Kyung Hyo Kim
Group B streptococcus (GBS) infection is a leading cause of sepsis and meningitis among infants, and is associated with high rates of morbidity and mortality in many countries. Protection against GBS typically involves antibody-mediated opsonization by phagocytes and complement components. The present study evaluated serotype-specific functional antibodies to GBS among Korean infants and in intravenous immunoglobulin (IVIG) products. An opsonophagocytic killing assay (OPA) was used to calculate the opsonization indices (OIs) of functional antibodies to serotypes Ia, Ib, and III in 19 IVIG products from 5 international manufacturers and among 98 Korean infants (age: 0-11 months)...
May 2017: Journal of Korean Medical Science
Nurettin Akyol, Ahmet Kalkisim, Adem Turk, Mehmet Kola, Halil Ibrahim Imamoglu
OBJECTIVE: To investigate the effects of two different medical treatment options on choroidal thickness (CT) in cases of open-angle glaucoma (OAG). METHODS: 67 eyes newly diagnosed with OAG and 52 healthy eyes constituting the control group were included in the study. Glaucomatous eyes were randomly divided into two subgroups; Group I was started on bimatoprost 0.03% and Group II on a brinzolamide 1.0%/timolol maleate 0.5% fixed combination (BTFC). Intraocular pressure (IOP), ocular pulse amplitude (OPA), and subfoveal CT measurements were performed in all eyes in the study before treatment and on weeks 2, 4 and 8 after treatment...
April 4, 2017: Cutaneous and Ocular Toxicology
Mohamed Tashani, Leon Heron, Melanie Wong, Harunor Rashid, Robert Booy
Background: : Due to their antigenic similarities, there is a potential for immunological interaction between tetanus/diphtheria-containing vaccines and carrier proteins presented on conjugate vaccines. The interaction could, unpredictably, result in either enhancement or suppression of the immune response to conjugate vaccines if they are injected soon after or concurrently with diphtheria or tetanus toxoid. We examined this interaction among adult Australian travellers before attending the Hajj pilgrimage of 2015...
July 1, 2017: Journal of Travel Medicine
Eve M Mulcahy, Maéva Fargier-Lagrange, Daniel M Mulvihill, James A O'Mahony
Whey protein isolate (WPI) solutions, with different levels of aggregated protein, were prepared by heating (5% protein, pH 7, 90°C for 30min) WPI solutions with either 20mM added NaCl (WPI+NaCl), 5mM N-ethylmaleimide (WPI+NEM) or 20mM added NaCl and 5mM NEM (WPI+NaCl+NEM). Gel electrophoresis demonstrated that the heated WPI and WPI+NaCl solutions had higher levels of aggregated protein, due to more covalent interactions between proteins, than the heated WPI+NEM and WPI+NaCl+NEM solutions. There were marked differences in the levels of amino groups between all heated WPI solutions when measured by the OPA and TNBS methods, with lower levels being measured by the TNBS method than by the OPA method...
August 15, 2017: Food Chemistry
Patricia Mendoza-García, Fredrik Hugosson, Mahsa Fallah, Michael L Higgins, Yasuno Iwasaki, Kathrin Pfeifer, Georg Wolfstetter, Gaurav Varshney, Dmitry Popichenko, J Peter Gergen, Korneel Hens, Bart Deplancke, Ruth H Palmer
The Anaplastic Lymphoma Kinase (Alk) receptor tyrosine kinase (RTK) plays a critical role in the specification of founder cells (FCs) in the Drosophila visceral mesoderm (VM) during embryogenesis. Reporter gene and CRISPR/Cas9 deletion analysis reveals enhancer regions in and upstream of the Alk locus that influence tissue-specific expression in the amnioserosa (AS), the VM and the epidermis. By performing high throughput yeast one-hybrid screens (Y1H) with a library of Drosophila transcription factors (TFs) we identify Odd-paired (Opa), the Drosophila homologue of the vertebrate Zic family of TFs, as a novel regulator of embryonic Alk expression...
April 2017: PLoS Genetics
Yanchun Yin, Andrew Chew, Xiaoming Ren, Jie Li, Yang Wang, Yi Wu, Zenghu Chang
We present an approach for both efficient generation and amplification of 4-12 μm pulses by tailoring the phase matching of the nonlinear crystal Zinc Germanium Phosphide (ZGP) in a narrowband-pumped optical parametric chirped pulse amplifier (OPCPA) and a broadband-pumped dual-chirped optical parametric amplifier (DC-OPA), respectively. Preliminary experimental results are obtained for generating 1.8-4.2 μm super broadband spectra, which can be used to seed both the signal of the OPCPA and the pump of the DC-OPA...
April 3, 2017: Scientific Reports
Li Cui, Xiao-Qing Guan, Zhang-Min Liu, Liu-Yin Fan, Qian Li, Yan Feng
Valienamine and β-valienamine are representative C7 N aminocyclitols with significant glycosidase inhibition activity that have been developed as important precursors of drugs for diabetes and lysosomal storage diseases, respectively. The quantitative analysis of these chiral compounds is crucial for asymmetric in vitro biosynthetic processes for converting valienone into valienamine epimers using aminotransferase. Here, we developed an efficient and sensitive method for separation and quantitative analysis of chiral valienamine using reversed-phase high-performance liquid chromatography (HPLC) through o-phthalaldehyde (OPA) pre-column derivatization of the analytes...
April 2017: Journal of Asian Natural Products Research
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