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https://www.readbyqxmd.com/read/28238365/the-well-sorted-fine-sand-community-from-the-western-mediterranean-sea-a-resistant-and-resilient-marine-habitat-under-diverse-human-pressures
#1
Jean-Claude Dauvin, Ali Bakalem, Alexandrine Baffreau, Claire Delecrin, Gérard Bellan, Claudio Lardicci, Elena Balestri, Rafael Sardá, Samir Grimes
The Biocoenosis of Well Sorted Fine Sands (WSFS) (SFBC, Sables Fins Bien Calibrés in French) is a Mediterranean community very well delimited by bathymetry (2-25 m) and sedimentology (>90% of fine sand) occurring in zones with relatively strong hydrodynamics. In this study focused on sites located along the Algerian, French, Italian and Spanish coasts of the Western Basin of the Mediterranean Sea (WBMS) we aim to compare the structure, ecological status and diversity of the macrofauna of the WSFS and examine the effects of recent human pressures on the state of this shallow macrobenthic community...
February 18, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28228253/sirt6-suppresses-cancer-stem-like-capacity-in-tumors-with-pi3k-activation-independently-of-its-deacetylase-activity
#2
Rafael M Ioris, Mirco Galié, Giorgio Ramadori, Jason G Anderson, Anne Charollais, Georgia Konstantinidou, Xavier Brenachot, Ebru Aras, Algera Goga, Nicholas Ceglia, Carlos Sebastián, Denis Martinvalet, Raul Mostoslavsky, Pierre Baldi, Roberto Coppari
Cancer stem cells (CSCs) have high tumorigenic capacity. Here, we show that stem-like traits of specific human cancer cells are reduced by overexpression of the histone deacetylase sirtuin 6 (SIRT6). SIRT6-sensitive cancer cells bear mutations that activate phosphatidylinositol-3-kinase (PI3K) signaling, and overexpression of SIRT6 reduces growth, progression, and grade of breast cancer in a mouse model with PI3K activation. Tumor metabolomic and transcriptomic analyses reveal that SIRT6 overexpression dampens PI3K signaling and stem-like characteristics and causes metabolic rearrangements in this cancer model...
February 21, 2017: Cell Reports
https://www.readbyqxmd.com/read/28226305/effect-of-maternal-rumination-and-disengagement-during-childhood-on-offspring-neural-response-to-reward-in-late-adolescence
#3
Judith K Morgan, Daniel S Shaw, Rachel H Jacobs, Sarah E Romens, Stephanie L Sitnick, Erika E Forbes
Maternal rumination is a cognitive-affective trait that could influence offspring's ability to respond flexibly to positive and negative events, depending on the quality of maternal problem-solving behaviors with which rumination co-occurs. As reward circuitry is sensitive to stressors and related to risk for depression, reward circuitry is an appropriate candidate mechanism for how maternal characteristics influence offspring. We evaluated the independent and combined effect of maternal rumination and disengagement on adolescent neural response to reward win and loss...
February 11, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28207746/protease-resistance-of-infectious-prions-is-suppressed-by-removal-of-a-single-atom-in-the-cellular-prion-protein
#4
Henning Leske, Simone Hornemann, Uli Simon Herrmann, Caihong Zhu, Paolo Dametto, Bei Li, Florent Laferriere, Magdalini Polymenidou, Pawel Pelczar, Regina Rose Reimann, Petra Schwarz, Elisabeth Jane Rushing, Kurt Wüthrich, Adriano Aguzzi
Resistance to proteolytic digestion has long been considered a defining trait of prions in tissues of organisms suffering from transmissible spongiform encephalopathies. Detection of proteinase K-resistant prion protein (PrPSc) still represents the diagnostic gold standard for prion diseases in humans, sheep and cattle. However, it has become increasingly apparent that the accumulation of PrPSc does not always accompany prion infections: high titers of prion infectivity can be reached also in the absence of protease resistant PrPSc...
2017: PloS One
https://www.readbyqxmd.com/read/28201989/revisiting-phylogenetic-signal-strong-or-negligible-impacts-of-polytomies-and-branch-length-information
#5
Rafael Molina-Venegas, Miguel Á Rodríguez
BACKGROUND: Inaccurate estimates of phylogenetic signal may mislead interpretations of many ecological and evolutionary processes, and hence understanding where potential sources of uncertainty may lay has become a priority for comparative studies. Importantly, the sensitivity of phylogenetic signal indices and their associated statistical tests to incompletely resolved phylogenies and suboptimal branch-length information has been only partially investigated. METHODS: Here, we use simulations of trait evolution along phylogenetic trees to assess whether incompletely resolved phylogenies (polytomic chronograms) and phylogenies with suboptimal branch-length information (pseudo-chronograms) could produce directional biases in significance tests (p-values) associated with Blomberg et al...
February 15, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28199904/cyclic-electron-flow-may-provide-some-protection-against-psii-photoinhibition-in-rice-oryza-sativa-l-leaves-under-heat-stress
#6
Jemaa Essemine, Yi Xiao, Mingnan Qu, Hualing Mi, Xin-Guang Zhu
Previously we have shown that a quick down-regulation in PSI activity compares to that of PSII following short-term heat stress for two rice groups including C4023 and Q4149, studied herein. These accessions were identified to have different natural capacities in driving cyclic electron flow (CEF) around PSI; i.e., low CEF (lcef) and high CEF (hcef) for C4023 and Q4149, respectively. The aim of this study was to investigate whether these two lines have different mechanisms of protecting photosystem II from photodamage under heat stress...
January 30, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28196112/the-role-of-dispersal-mode-and-habitat-specialization-for-metacommunity-structure-of-shallow-beach-invertebrates
#7
Iván F Rodil, Paloma Lucena-Moya, Henri Jokinen, Victoria Ollus, Håkan Wennhage, Anna Villnäs, Alf Norkko
Metacommunity ecology recognizes the interplay between local and regional patterns in contributing to spatial variation in community structure. In aquatic systems, the relative importance of such patterns depends mainly on the potential connectivity of the specific system. Thus, connectivity is expected to increase in relation to the degree of water movement, and to depend on the specific traits of the study organism. We examined the role of environmental and spatial factors in structuring benthic communities from a highly connected shallow beach network using a metacommunity approach...
2017: PloS One
https://www.readbyqxmd.com/read/28187336/establishing-a-clinically-relevant-cutoff-to-the-dependency-scale-from-the-dimensional-clinical-personality-inventory
#8
Lucas de F Carvalho, Giselle Pianowski, Nelson H Filho
The Clinical Dimensional Personality Inventory (IDCP) is a 163-item self-report tool developed for the assessment of 12 dimensions of personality pathology. One of the scales comprising the instrument-the Dependency scale-is intended to provide psychometric information on traits closely related to the Dependent Personality Disorder (DPD). In the present study, we used both Item Response Theory modeling and Receiver Operating Characteristic curve analysis to establishing a clinically meaningful cutoff for the IDCP Dependency Scale...
February 3, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28186615/environmental-stress-correlates-with-increases-in-both-genetic-and-residual-variances-a-meta-analysis-of-animal-studies
#9
Piotr K Rowinski, Björn Rogell
Adaptive evolutionary responses are determined by the strength of selection and the amount of genetic variation within traits, however, both are known to vary across environmental conditions. As selection is generally expected to be strongest under stressful conditions, understanding how the expression of genetic variation changes across stressful and benign environmental conditions is crucial for predicting the rate of adaptive change. While theory generally predicts increased genetic variation under stress, previous syntheses of the field has found limited support for this notion...
February 10, 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/28182576/critical-appraisal-of-discriminant-formulas-for-distinguishing-thalassemia-from-iron-deficiency-in-patients-with-microcytic-anemia
#10
Eloísa Urrechaga, Johannes J M L Hoffmann
BACKGROUND: Many discriminant formulas have been reported for distinguishing thalassemia trait from iron deficiency in patients with microcytic anemia. Independent verification of several discriminant formulas is deficient or even lacking. Therefore, we have retrospectively investigated discriminant formulas in a large, well-characterized patient population. METHODS: The investigational population consisted of 2664 patients with microcytic anemia: 1259 had iron deficiency, 1196 'pure' thalassemia trait (877 β- and 319 α-thalassemia), 150 had thalassemia trait with concomitant iron deficiency or anemia of chronic disease, and 36 had other diseases...
February 9, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28168223/effects-of-organic-amendments-on-microbiota-associated-with-the-culex-nigripalpus-mosquito-vector-of-the-saint-louis-encephalitis-and-west-nile-viruses
#11
Dagne Duguma, Michael W Hall, Chelsea T Smartt, Josh D Neufeld
Pollution from nutrients in aquatic habitats has been linked to increases in disease vectors, including mosquitoes and other pestiferous insects. One possibility is that changes in mosquito microbiomes are impacted by nutrient enrichments and that these changes affect various traits, including larval development, susceptibility to larval control agents, and susceptibility of the adult mosquitoes to pathogens. We tested this hypothesis using field mesocosms supplemented with low- and high-organic-nutrient regimens and then sampled microbial communities associated with the naturally colonizing Culex nigripalpus mosquito vector...
January 2017: MSphere
https://www.readbyqxmd.com/read/28168032/no-inbreeding-depression-in-laboratory-reared-individuals-of-the-parasitoid-wasp-allotropa-burrelli
#12
Bastien Quaglietti, Lucie Tamisier, Géraldine Groussier, Alexandre Fleisch, Isabelle Le Goff, Nicolas Ris, Philippe Kreiter, Xavier Fauvergue, Thibaut Malausa
Inbreeding depression is a major concern in almost all human activities relating to plant and animal breeding. The biological control of pests with natural enemies is no exception, because populations of biocontrol agents experience a series of bottlenecks during importation, rearing, and introduction. A classical biological control program for the Comstock mealybug Pseudococcus comstocki (Hemiptera: Pseudococcidae) was initiated in France in 2008, based on the introduction of an exotic parasitoid, Allotropa burrelli Mues...
February 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28156438/validation-of-the-living-with-cancer-lwc-pro-tool-for-identifying-patients-pts-with-cancer-appropriate-for-end-of-life-care-consultations
#13
Andrew Pecora, Eric Schultz, Hyun Gi Noh, Katherine DeMarco, Jose Contreras, Kelly Choi, Stuart L Goldberg
: 85 Background: End-of-life care (EOLC) discussions for pts with advanced malignancies are often delayed resulting in unwanted, wasteful treatment. COTA Inc has developed a 7-item PRO instrument (LWC) to facilitate identification of pts in distress. A pilot study of 433 pts at a single institution was able to determine a threshold distress score (> 28) correlating with physician assessment of appropriateness for EOLC consultation (2015 ASCO Palliative Care Symposium). METHODS: LWC explores 4 personhood and clinical domains (performance status, pain, burden, and depression)...
October 9, 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28152567/phospholipase-d%C3%AE-1-mediated-phosphatidic-acid-change-is-a-key-determinant-of-desiccation-induced-viability-loss-in-seeds
#14
Hongying Chen, Xiaomei Yu, Xudong Zhang, Lan Yang, Xing Huang, Jie Zhang, Hugh W Pritchard, Weiqi Li
High sensitivity of seeds to water loss is a widespread phenomenon in the world's plant species. The molecular basis of this trait is poorly understood but thought to be associated with critical changes in membrane function. We profiled membrane lipids of seeds in eight species with varying levels of desiccation tolerance and found a close association between reducing seed viability and increasing phosphatidic acid (PA). We applied hydration-dehydration cycles to Arabidopsis seeds, that are normally desiccation tolerant, to mimic the onset of desiccation sensitivity with progression towards germination and examined the role of phospholipase D (PLD) in desiccation stress-induced production of PA...
February 2, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28142070/ptsd-symptom-severity-and-sensitivity-to-blood-injury-and-mutilation-in-u-s-army-special-operations-soldiers
#15
James A Naifeh, Robert J Ursano, Natasha Benfer, Hongyan Wu, Michelle Herman, David M Benedek, Dale W Russell, K Nikki Benevides, Tzu-Cheg Kao, Tsz Hin H Ng, Pablo A Aliaga, Gary H Wynn, Lei Zhang, Robert D Forsten, Carol S Fullerton
Sensitivity to blood, injury, and mutilation (SBIM) may increase risk for posttraumatic stress disorder (PTSD), given that traumatic events often involve actual or perceived threat of bodily harm to oneself and/or others, including exposure to blood and other mutilation-related stimuli. A self-report questionnaire was administered to male, active duty, U.S. Army Special Operations Command soldiers who had deployed to Iraq and Afghanistan (n =694 males). We first used exploratory factor analysis to examine whether the 30-item Mutilation Questionnaire (Klorman et al...
January 23, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28139377/cpt1a-methylation-is-associated-with-plasma-adiponectin
#16
S Aslibekyan, A N Do, H Xu, S Li, M R Irvin, D Zhi, H K Tiwari, D M Absher, A R Shuldiner, T Zhang, W Chen, K Tanner, C Hong, B D Mitchell, G Berenson, D K Arnett
BACKGROUND AND AIMS: Adiponectin, an adipose-secreted protein that has been linked to insulin sensitivity, plasma lipids, and inflammatory patterns, is an established biomarker for metabolic health. Despite clinical relevance and high heritability, the determinants of plasma adiponectin levels remain poorly understood. METHODS AND RESULTS: We conducted the first epigenome-wide cross-sectional study of adiponectin levels using methylation data on 368,051 cytosine-phosphate-guanine (CpG) sites in CD4+ T-cells from the Genetics of Lipid Lowering Drugs and Diet Network (GOLDN, n = 991)...
November 23, 2016: Nutrition, Metabolism, and Cardiovascular Diseases: NMCD
https://www.readbyqxmd.com/read/28132028/digit-a-tool-for-detection-and-identification-of-genomic-interchromosomal-translocations
#17
Richard Meier, Stefan Graw, Peter Beyerlein, Devin Koestler, Julian R Molina, Jeremy Chien
Structural variations (SVs) in genomic DNA can have profound effects on the evolution of living organisms, on phenotypic variations and on disease processes. A critical step in discovering the full extent of structural variations is the development of tools to characterize these variations accurately in next generation sequencing data. Toward this goal, we developed a software pipeline named digit that implements a novel measure of mapping ambiguity to discover interchromosomal SVs from mate-pair and pair-end sequencing data...
January 27, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28131994/ectopic-accumulation-of-linalool-confers-resistance-to-xanthomonas-citri-subsp-citri-in-transgenic-sweet-orange-plants
#18
Takehiko Shimada, Tomoko Endo, Ana Rodríguez, Hiroshi Fujii, Shingo Goto, Takakazu Matsuura, Yuko Hojo, Yoko Ikeda, Izumi C Mori, Takashi Fujikawa, Leandro Peña, Mitsuo Omura
In order to clarify whether high linalool content in citrus leaves alone induces strong field resistance to citrus canker caused by Xanthomonas citri subsp. citri (Xcc), and to assess whether this trait can be transferred to a citrus type highly sensitive to the bacterium, transgenic 'Hamlin' sweet orange (Citrus sinensis L. Osbeck) plants over-expressing a linalool synthase gene (CuSTS3-1) were generated. Transgenic lines (LIL) with the highest linalool content showed strong resistance to citrus canker when spray inoculated with the bacterium...
January 27, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28131583/consistent-magnitude-of-postpartum-body-weight-loss-within-cows-across-lactations-and-the-relation-to-reproductive-performance
#19
M Zachut, U Moallem
Great variation exists among cows in the magnitude of tissue mobilization during early lactation; however, it is not known whether this is an intrinsic trait. Our aims were (1) to test whether the degree of body weight (BW) loss is consistent within cows across lactations by examining daily BW records of 4 to 5 consecutive lactations and their relation to milk yield, health disorders, and reproductive performance; and (2) to examine, in an intensive study, the possible underlying physiological mechanism. Data from 416 first to fifth consecutive lactations obtained from 92 Israeli high-yielding Holstein dairy cows were analyzed...
January 25, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28130467/multimodal-mri-profiling-of-focal-cortical-dysplasia-type-ii
#20
Seok-Jun Hong, Boris C Bernhardt, Benoit Caldairou, Jeffery A Hall, Marie C Guiot, Dewi Schrader, Neda Bernasconi, Andrea Bernasconi
OBJECTIVE: To characterize in vivo MRI signatures of focal cortical dysplasia (FCD) type IIA and type IIB through combined analysis of morphology, intensity, microstructure, and function. METHODS: We carried out a multimodal 3T MRI profiling of 33 histologically proven FCD type IIA (9) and IIB (24) lesions. A multisurface approach operating on manual consensus labels systematically sampled intracortical and subcortical lesional features. Geodesic distance mapping quantified the same features in the lesion perimeter...
January 27, 2017: Neurology
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