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https://www.readbyqxmd.com/read/27929404/association-among-complement-factor-h-autoantibodies-deletions-of-cfhr-and-the-risk-of-atypical-hemolytic-uremic-syndrome
#1
Hong Jiang, Meng-Nan Fan, Min Yang, Chao Lu, Ming Zhang, Xiao-Hong Liu, Le Ma
To evaluate the association among complement factor H-related (CFHRs) gene deficiency, complement factor H (CFH) autoantibodies, and atypical hemolytic uremic syndrome (aHUS) susceptibility. EMBASE, PubMed, and the ISI Web of Science databases were searched for all eligible studies on the relationship among CFHRs deficiency, anti-FH autoantibodies, and aHUS risk. Eight case-control studies with 927 cases and 1182 controls were included in this study. CFHR1 deficiency was significantly associated with an increased risk of aHUS (odds ratio (OR) = 3...
December 5, 2016: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/27917368/sex-steroid-hormone-single-nucleotide-polymorphisms-pesticide-use-and-the-risk-of-prostate-cancer-a-nested-case-control-study-within-the-agricultural-health-study
#2
Carol H Christensen, Kathryn Hughes Barry, Gabriella Andreotti, Michael C R Alavanja, Michael B Cook, Scott P Kelly, Laurie A Burdett, Meredith Yeager, Laura E Beane Freeman, Sonja I Berndt, Stella Koutros
Experimental and epidemiologic investigations suggest that certain pesticides may alter sex steroid hormone synthesis, metabolism or regulation, and the risk of hormone-related cancers. Here, we evaluated whether single-nucleotide polymorphisms (SNPs) involved in hormone homeostasis alter the effect of pesticide exposure on prostate cancer risk. We evaluated pesticide-SNP interactions between 39 pesticides and SNPs with respect to prostate cancer among 776 cases and 1,444 controls nested in the Agricultural Health Study cohort...
2016: Frontiers in Oncology
https://www.readbyqxmd.com/read/27917112/reproducibility-and-reliability-of-quantitative-and-weighted-t1-and-t2-%C3%A2-mapping-for-myelin-based-cortical-parcellation-at-7-tesla
#3
Roy A M Haast, Dimo Ivanov, Elia Formisano, Kâmil Uludaǧ
Different magnetic resonance (MR) parameters, such as R1 (=1/T1) or T2(∗), have been used to visualize non-invasively the myelin distribution across the cortical sheet. Myelin contrast is consistently enhanced in the primary sensory and some higher order cortical areas (such as MT or the cingulate cortex), which renders it suitable for subject-specific anatomical cortical parcellation. However, no systematic comparison has been performed between the previously proposed MR parameters, i.e., the longitudinal and transversal relaxation values (or their ratios), for myelin mapping at 7 Tesla...
2016: Frontiers in Neuroanatomy
https://www.readbyqxmd.com/read/27913418/a-novel-rhamnose-rich-hetero-exopolysaccharide-isolated-from-lactobacillus-paracasei-dg-activates-thp-1-human-monocytic-cells
#4
Silvia Balzaretti, Valentina Taverniti, Simone Guglielmetti, Walter Fiore, Mario Minuzzo, Hansel N Ngo, Judith B Ngere, Sohaib Sadiq, Paul N Humphreys, Andrew P Laws
: Lactobacillus paracasei DG is a bacterial strain with recognized probiotic properties and is used in commercial probiotic products. However, the mechanisms underlying its probiotic properties are mainly unknown. In this study, we tested the hypothesis that the capability of strain DG to interact with the host is, at least partly, associated with its ability to synthesize a surface-associated exopolysaccharide (EPS). Comparative genomics revealed the presence of putative EPS gene clusters in DG genome; accordingly, EPS was isolated from the surface of the bacterium...
December 2, 2016: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/27905616/on-tuning-microgel-character-and-softness-of-cross-linked-polystyrene-particles
#5
Jochen Schneider, Malte Wiemann, Anna Rabe, Eckhard Bartsch
Polystyrene (PS) microgel colloids have often been used successfully to model hard sphere behaviour even though the term "gel" invokes inevitably the notion of a more or less soft, deformable object. Here we systematically study the effect of reducing the cross-link density from 1 : 10 (1 cross-link per 10 monomers) to 1 : 100 on particle interactions and "softness". We report on the synthesis and purification of 1 : 10, 1 : 25, 1 : 50, 1 : 75 and 1 : 100 cross-linked PS particles and their characterization in terms of single particle properties, as well as the behaviour of concentrated dispersions...
December 1, 2016: Soft Matter
https://www.readbyqxmd.com/read/27901310/topical-antimycotics-for-oral-candidiasis-in-warfarin-users
#6
Maja Hellfritzsch, Anton Pottegård, Andreas James Thestrup Pedersen, Alaa Burghle, Fatima Mouaanaki, Jesper Hallas, Erik Lerkevang Grove, Per Damkier
Treatment of oral candidiasis in warfarin users may be complicated by drug-drug interactions between warfarin and topically applied antimycotics. However, current knowledge of these putative drug-drug interactions is merely based on case series. We therefore performed a cohort cross-over study with the objective to evaluate the potential drug-drug interactions between warfarin and miconazole oral gel or nystatin oral solution. The cohort consisted of individuals using warfarin in the period of 1998-2012 (n≈7,400)...
November 30, 2016: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/27897996/in-vitro-chemopreventive-properties-of-green-tea-rooibos-and-honeybush-extracts-in-skin-cells
#7
Tandeka U Magcwebeba, Pieter Swart, Sonja Swanevelder, Elizabeth Joubert, Wentzel C A Gelderblom
The chemopreventive properties of the herbal teas rooibos (Aspalathus linearis) and honeybush (Cyclopia spp.) have been demonstrated on mouse skin in vivo but the underlying mechanisms are not clear. The aim of the current study was to determine the anti-proliferative and pro-apoptotic activity of methanol and aqueous extracts of rooibos and two Cyclopia species in different skin cells, using green tea (Camellia sinensis) as a benchmark. Extracts were also characterised for their major individual polyphenols by high performance liquid chromatography and spectroscopically for the total polyphenol (TP) groups...
November 25, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27890768/proton-pump-inhibitor-and-histamine-2-receptor-antagonist-use-and-iron-deficiency
#8
Jameson R Lam, Jennifer L Schneider, Charles P Quesenberry, Douglas A Corley
BACKGROUND AND AIMS: Proton pump inhibitors (PPIs) and histamine-2 receptor antagonists (H2RAs) suppress gastric acid production, which may inhibit iron absorption. However, little data exist regarding whether these medications increase the risk of clinical iron deficiency. METHODS: A community-based case-control study evaluated the association between acid-suppressing medication use and the subsequent risk of iron deficiency. It contrasted 77,046 patients with new iron deficiency diagnoses (January, 1999-December, 2013), with 389,314 controls...
November 24, 2016: Gastroenterology
https://www.readbyqxmd.com/read/27889665/a-three-dimensional-spheroidal-cancer-model-based-on-peg-fibrinogen-hydrogel-microspheres
#9
Shantanu Pradhan, Jacob M Clary, Dror Seliktar, Elizabeth A Lipke
Three-dimensional (3D) in vitro cancer models offer an attractive approach towards the investigation of tumorigenic phenomena and other cancer studies by providing dimensional context and higher degree of physiological relevance than that offered by conventional two-dimensional (2D) models. The multicellular tumor spheroid model, formed by cell aggregation, is considered to be the "gold standard" for 3D cancer models, due to its ease and simplicity of use. Although better than 2D models, tumor spheroids are unable to replicate key features of the native tumor microenvironment, particularly due to a lack of surrounding extracellular matrix components and heterogeneity in shape, size and aggregate forming tendencies...
January 2017: Biomaterials
https://www.readbyqxmd.com/read/27889263/shade-promotes-phototropism-through-phytochrome-b-controlled-auxin-production
#10
Anupama Goyal, Elizabeth Karayekov, Vinicius Costa Galvão, Hong Ren, Jorge J Casal, Christian Fankhauser
Phototropism is an asymmetric growth response enabling plants to optimally position their organs. In flowering plants, the phototropin (phot) blue light receptors are essential to detect light gradients. In etiolated seedlings, the phototropic response is enhanced by the red/far-red (R/FR)-sensing phytochromes (phy) with a predominant function of phyA. In this study, we analyzed the influence of the phytochromes on phototropism in green (de-etiolated) Arabidopsis seedlings. Our experiments in the laboratory and outdoors revealed that, in open environments (high R/FR ratio), phyB inhibits phototropism...
November 22, 2016: Current Biology: CB
https://www.readbyqxmd.com/read/27881200/sow-level-risk-factors-for-stillbirth-of-piglets-in-organic-sow-herds
#11
L Rangstrup-Christensen, M A Krogh, L J Pedersen, J T Sørensen
In Danish organic pig production, one-third of total born piglets die before weaning, and stillbirth has previously crudely been estimated to account for 27% of the total preweaning mortality. The objective of this study was to evaluate season, litter size, parity and body condition of the sow as risk factors for stillbirth in nine commercial Danish organic pig herds. The study was conducted over a 1-year period, and the data included registrations on 5170 farrowings with 82 906 total born piglets. The average number of total born piglets per litter was 16...
November 24, 2016: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/27879680/stereoselective-alkane-oxidation-with-meta-chloroperoxybenzoic-acid-mcpba-catalyzed-by-organometallic-cobalt-complexes
#12
Georgiy B Shul'pin, Dmitriy A Loginov, Lidia S Shul'pina, Nikolay S Ikonnikov, Vladislav O Idrisov, Mikhail M Vinogradov, Sergey N Osipov, Yulia V Nelyubina, Polina M Tyubaeva
Cobalt pi-complexes, previously described in the literature and specially synthesized and characterized in this work, were used as catalysts in homogeneous oxidation of organic compounds with peroxides. These complexes contain pi-butadienyl and pi-cyclopentadienyl ligands: [(tetramethylcyclobutadiene)(benzene)cobalt] hexafluorophosphate, [(C₄Me₄)Co(C₆H₆)]PF₆ (1); diiodo(carbonyl)(pentamethylcyclopentadienyl)cobalt, Cp*Co(CO)I₂ (2); diiodo(carbonyl)(cyclopentadienyl)cobalt, CpCo(CO)I₂ (3); (tetramethylcyclobutadiene)(dicarbonyl)(iodo)cobalt, (C₄Me₄)Co(CO)₂I (4); [(tetramethylcyclobutadiene)(acetonitrile)(2,2'-bipyridyl)cobalt] hexafluorophosphate, [(C₄Me₄)Co(bipy)(MeCN)]PF₆ (5); bis[dicarbonyl(B-cyclohexylborole)]cobalt, [(C₄H₄BCy)Co(CO)₂]₂ (6); [(pentamethylcyclopentadienyl)(iodo)(1,10-phenanthroline)cobalt] hexafluorophosphate, [Cp*Co(phen)I]PF₆ (7); diiodo(cyclopentadienyl)cobalt, [CpCoI₂]₂ (8); [(cyclopentadienyl)(iodo)(2,2'-bipyridyl)cobalt] hexafluorophosphate, [CpCo(bipy)I]PF₆ (9); and [(pentamethylcyclopentadienyl)(iodo)(2,2'-bipyridyl)cobalt] hexafluorophosphate, [Cp*Co(bipy)I]PF₆ (10)...
November 22, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27870021/temperature-dependence-of-predation-stress-and-the-nutritional-ecology-of-a-generalist-herbivore
#13
Oswald J Schmitz, Adam E Rosenblatt, Meredith Smylie
Prey at risk of predation may experience stress and respond physiologically by altering their metabolic rates. Theory predicts that such physiological changes should alter prey nutrient demands from N-rich to C-rich macronutrients and shift the balance between maintenance and growth/reproduction. Theory further suggests that for ectotherms, temperature stands to exacerbate this stress. Yet, the interactive effects of predation stress and temperature stress on diet, metabolism, and survival of ectotherms are not well known...
November 2016: Ecology
https://www.readbyqxmd.com/read/27868385/impact-of-eplerenone-on-cardiovascular-outcomes-in-heart-failure-patients-with-hypokalaemia
#14
Patrick Rossignol, Nicolas Girerd, George Bakris, Orly Vardeny, Brian Claggett, John J V McMurray, Karl Swedberg, Henry Krum, Dirk J van Veldhuisen, Harry Shi, Sean Spanyers, John Vincent, Renaud Fay, Zohra Lamiral, Scott D Solomon, Faiez Zannad, Bertram Pitt
AIMS: Although hypokalaemia is common among patients with heart failure (HF), the prognostic significance of baseline hypokalaemia and hypokalaemia during follow-up in HF patients receiving a mineralocorticoid receptor antagonist (MRA) remains uncertain. METHODS AND RESULTS: Results of the EMPHASIS-HF trial in patients (n = 2737) with HF and reduced EF with mild symptoms, randomized to eplerenone or placebo, were analysed with regard to the presence or occurrence of hypokalaemia (serum K(+) <4...
November 20, 2016: European Journal of Heart Failure
https://www.readbyqxmd.com/read/27864048/aversive-properties-of-negative-incentive-shifts-in-fischer-344-and-lewis-rats
#15
Adam Brewer, Patrick Johnson, Jeff Stein, Michael Schlund, Dean C Williams
Research on incentive contrast highlights that reward value is not absolute but rather is based upon comparisons we make to rewards we have received and expect to receive. Both human and nonhuman studies on incentive contrast show that shifting from a larger more-valued reward to a smaller less-valued reward is associated with long periods of nonresponding - a negative contrast effect. In this investigation, we used two different genetic rat strains, Fischer 344 and Lewis rats that putatively differ in their sensitivity to aversive stimulation, to assess the aversive properties of large-to-small reward shifts (negative incentive shifts)...
November 15, 2016: Behavioural Brain Research
https://www.readbyqxmd.com/read/27859133/eutrophication-triggers-contrasting-multilevel-feedbacks-on-litter-accumulation-and-decomposition-in-fens
#16
W-J Emsens, C J S Aggenbach, A P Grootjans, E E Nfor, J Schoelynck, E Struyf, R van Diggelen
Eutrophication is a major threat for the persistence of nutrient-poor fens, as multilevel feedbacks on decomposition rates could trigger carbon loss and increase nutrient cycling. Here, we experimentally investigate the effects of macronutrient (NPK) enrichment on litter quality of six species of sedge (Carex sp.), which we relate to litter decomposition rates in a nutrient-poor and nutrient-rich environment. Our research focused on four levels: we examined how eutrophication alters (1) fresh litter production ("productivity shift"), (2) litter stoichiometry within the same species ("intraspecific shift"), (3) overall litter stoichiometry of the vegetation under the prediction that low-competitive species are outcompeted by fast-growing competitors ("interspecific shift"), and (4) litter decomposition rates due to an altered external environment (e...
October 2016: Ecology
https://www.readbyqxmd.com/read/27859108/food-web-structure-shaped-by-habitat-size-and-climate-across-a-latitudinal-gradient
#17
Gustavo Q Romero, Gustavo C O Piccoli, Paula M de Omena, Thiago Gonçalves-Souza
Habitat size and climate are known to affect the trophic structure and dynamics of communities, but their interactive effects are poorly understood. Organisms from different trophic levels vary in terms of metabolic requirements and heat dissipation. Indeed, larger species such as keystone predators require more stable climatic conditions than their prey. Likewise, habitat size disproportionally affects large-sized predators, which require larger home ranges and are thus restricted to larger habitats. Therefore, food web structure in patchy ecosystems is expected to be shaped by habitat size and climate variations...
October 2016: Ecology
https://www.readbyqxmd.com/read/27853639/the-ratio-of-cd8-foxp3-t-lymphocytes-infiltrating-breast-tissues-predicts-the-relapse-of-ductal-carcinoma-in-situ
#18
Michaela Semeraro, Julien Adam, Gautier Stoll, Emilie Louvet, Kariman Chaba, Vichnou Poirier-Colame, Allan Sauvat, Laura Senovilla, Erika Vacchelli, Norma Bloy, Juliette Humeau, Aitziber Buque, Oliver Kepp, Laurence Zitvogel, Fabrice André, Marie-Christine Mathieu, Suzette Delaloge, Guido Kroemer
In a series of 248 tumor samples obtained from image-guided biopsies from patients diagnosed with ductal carcinoma in situ of the breast, we attempted to identify biomarkers that predict microinfiltration at definitive surgery or relapse during follow-up. For this, we used immunohistochemical methods, followed by automated image analyses, to measure the mean diameter of nuclei (which correlates with ploidy), the phosphorylation of eukaryotic initiation factor 2α (eIF2α, which reflects endoplasmic reticulum stress) as well as the density and ratio of CD8(+) cytotoxic T lymphocytes and FOXP3(+) regulatory T cells...
2016: Oncoimmunology
https://www.readbyqxmd.com/read/27849082/deprotonated-guanine%C3%A2-cytosine-and-9-methylguanine%C3%A2-cytosine-base-pairs-and-their-non-statistical-kinetics-a-combined-guided-ion-beam-and-computational-study
#19
Wenchao Lu, Jianbo Liu
We report a guided-ion beam mass spectrometric study on collision-induced dissociation (CID) of deprotonated guanine(G)·cytosine(C) base pairs and their 9-methylguanine (9MG) analogue with Xe, including measurements of product cross sections as a function of collision energy and determination of dissociation thresholds. DFT, RI-MP2 and DLPNO-CCSD(T) calculations and Rice-Ramsperger-Kassel-Marcus (RRKM) modeling were performed to elucidate structures and kinetics. The experiment and theoretical study have provided considerable insight into tautomerization, intra-base-pair proton transfer and dissociation of deprotonated G·C and 9MG·C...
November 30, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27829050/high-resolution-ultrasound-switchable-fluorescence-imaging-in-centimeter-deep-tissue-phantoms-with-high-signal-to-noise-ratio-and-high-sensitivity-via-novel-contrast-agents
#20
Bingbing Cheng, Venugopal Bandi, Ming-Yuan Wei, Yanbo Pei, Francis D'Souza, Kytai T Nguyen, Yi Hong, Baohong Yuan
For many years, investigators have sought after high-resolution fluorescence imaging in centimeter-deep tissue because many interesting in vivo phenomena-such as the presence of immune system cells, tumor angiogenesis, and metastasis-may be located deep in tissue. Previously, we developed a new imaging technique to achieve high spatial resolution in sub-centimeter deep tissue phantoms named continuous-wave ultrasound-switchable fluorescence (CW-USF). The principle is to use a focused ultrasound wave to externally and locally switch on and off the fluorophore emission from a small volume (close to ultrasound focal volume)...
2016: PloS One
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