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https://www.readbyqxmd.com/read/28298529/deep-sea-coral-evidence-for-lower-southern-ocean-surface-nitrate-concentrations-during-the-last-ice-age
#1
Xingchen Tony Wang, Daniel M Sigman, Maria G Prokopenko, Jess F Adkins, Laura F Robinson, Sophia K Hines, Junyi Chai, Anja S Studer, Alfredo Martínez-García, Tianyu Chen, Gerald H Haug
The Southern Ocean regulates the ocean's biological sequestration of CO2 and is widely suspected to underpin much of the ice age decline in atmospheric CO2 concentration, but the specific changes in the region are debated. Although more complete drawdown of surface nutrients by phytoplankton during the ice ages is supported by some sediment core-based measurements, the use of different proxies in different regions has precluded a unified view of Southern Ocean biogeochemical change. Here, we report measurements of the (15)N/(14)N of fossil-bound organic matter in the stony deep-sea coral Desmophyllum dianthus, a tool for reconstructing surface ocean nutrient conditions...
March 15, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28298497/anorexia-nervosa-and-bone-densitometry
#2
Havilah Adkins
Anorexia nervosa is a psychological disorder with extensive physical complications that require care and monitoring from a diverse team of health care professionals. Although it can affect people of various ages and both sexes, anorexia most frequently occurs in adolescent girls during a crucial period of skeletal development. This article presents an overview of anorexia nervosa, followed by focused discussions of its effects on bone development, treatment of bone loss, and the radiologic technologist's role in caring for anorexic patients...
March 2017: Radiologic Technology
https://www.readbyqxmd.com/read/28285904/mex3a-marks-a-slowly-dividing-subpopulation-of-lgr5-intestinal-stem-cells
#3
Francisco M Barriga, Elisa Montagni, Miyeko Mana, Maria Mendez-Lago, Xavier Hernando-Momblona, Marta Sevillano, Amy Guillaumet-Adkins, Gustavo Rodriguez-Esteban, Simon J A Buczacki, Marta Gut, Holger Heyn, Douglas J Winton, Omer H Yilmaz, Camille Stephan-Otto Attolini, Ivo Gut, Eduard Batlle
Highly proliferative Lgr5+ stem cells maintain the intestinal epithelium and are thought to be largely homogeneous. Although quiescent intestinal stem cell (ISC) populations have been described, the identity and features of such a population remain controversial. Here we report unanticipated heterogeneity within the Lgr5+ ISC pool. We found that expression of the RNA-binding protein Mex3a labels a slowly cycling subpopulation of Lgr5+ ISCs that contribute to all intestinal lineages with distinct kinetics. Single-cell transcriptome profiling revealed that Lgr5+ cells adopt two discrete states, one of which is defined by a Mex3a expression program and relatively low levels of proliferation genes...
March 8, 2017: Cell Stem Cell
https://www.readbyqxmd.com/read/28285541/ethics-roundtable
#4
Steven J Baumrucker, Patrick J Macmillan, Matthew Stolick, Russell W Adkins, Gregory T Carter, Patricia York
No abstract text is available yet for this article.
January 1, 2017: American Journal of Hospice & Palliative Care
https://www.readbyqxmd.com/read/28283983/parthenium-weed-parthenium-hysterophorus-l-and-climate-change-the-effect-of-co2-concentration-temperature-and-water-deficit-on-growth-and-reproduction-of-two-biotypes
#5
Thi Nguyen, Ali Ahsan Bajwa, Sheldon Navie, Chris O'Donnell, Steve Adkins
Climate change will have a considerable impact upon the processes that moderate weed invasion, in particular to that of parthenium weed (Parthenium hysterophorus L.). This study evaluated the performance of two Australian biotypes of parthenium weed under a range of environmental conditions including soil moisture (100 and 50% of field capacity), atmospheric carbon dioxide (CO2) concentration (390 and 550 ppm), and temperature (35/20 and 30/15 °C/day/night). Measurements were taken upon growth, reproductive output, seed biology (fill, viability and dormancy) and soil seed longevity...
March 11, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28272771/sensitivity-of-diffusion-mri-to-perilesional-reactive-astrogliosis-in-focal-ischemia
#6
Rachel A Weber, Clifford H Chan, Xingju Nie, Emily Maggioncalda, Grace Valiulis, Abigail Lauer, Edward S Hui, Jens H Jensen, DeAnna L Adkins
Reactive astrogliosis is a response to injury in the central nervous system that plays an essential role in inflammation and tissue repair. It is characterized by hypertrophy of astrocytes, alterations in astrocyte gene expression and astrocyte proliferation. Reactive astrogliosis occurs in multiple neuropathologies, including stroke, traumatic brain injury and Alzheimer's disease, and it has been proposed as a possible source of the changes in diffusion magnetic resonance imaging (dMRI) metrics observed with these diseases...
March 8, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28249587/single-cell-transcriptome-conservation-in-cryopreserved-cells-and-tissues
#7
Amy Guillaumet-Adkins, Gustavo Rodríguez-Esteban, Elisabetta Mereu, Maria Mendez-Lago, Diego A Jaitin, Alberto Villanueva, August Vidal, Alex Martinez-Marti, Enriqueta Felip, Ana Vivancos, Hadas Keren-Shaul, Simon Heath, Marta Gut, Ido Amit, Ivo Gut, Holger Heyn
A variety of single-cell RNA preparation procedures have been described. So far, protocols require fresh material, which hinders complex study designs. We describe a sample preservation method that maintains transcripts in viable single cells, allowing one to disconnect time and place of sampling from subsequent processing steps. We sequence single-cell transcriptomes from >1000 fresh and cryopreserved cells using 3'-end and full-length RNA preparation methods. Our results confirm that the conservation process did not alter transcriptional profiles...
March 1, 2017: Genome Biology
https://www.readbyqxmd.com/read/28237235/assessing-the-time-taken-for-a-surveillance-system-to-detect-a-re-emergence-of-bovine-spongiform-encephalopathy-in-cattle
#8
Robin R L Simons, Mark E Arnold, Amie Adkin
During the bovine spongiform encephalopathy (BSE) epidemic in July 2001 the European Commission established a surveillance scheme for the comprehensive sampling of all BSE clinical suspects, healthy slaughter (HS) animals >30months, and all emergency slaughter and fallen stock animals tested when >24months. With the exponential decline in classical BSE cases, this comprehensive surveillance system has been successively modified to become risk-based, targeting those exit streams and ages where cases from the original epidemic are most likely to be detected...
March 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28226201/genomewide-association-study-of-alcohol-dependence-identifies-risk-loci-altering-ethanol-response-behaviors-in-model-organisms
#9
Amy E Adkins, Laura M Hack, Tim B Bigdeli, Vernell S Williamson, G Omari McMichael, Mohammed Mamdani, Alexis Edwards, Fazil Aliev, Robin F Chan, Poonam Bhandari, Richard C Raabe, Joseph T Alaimo, GinaMari G Blackwell, Arden A Moscati, Ryan S Poland, Benjamin Rood, Diana G Patterson, Dermot Walsh, John B Whitfield, Gu Zhu, Grant W Montgomery, Anjali K Henders, Nicholas G Martin, Andrew C Heath, Pamela A F Madden, Josef Frank, Monika Ridinger, Norbert Wodarz, Michael Soyka, Peter Zill, Marcus Ising, Markus M Nöthen, Falk Kiefer, Marcella Rietschel, Joel Gelernter, Richard Sherva, Ryan Koesterer, Laura Almasy, Hongyu Zhao, Henry R Kranzler, Lindsay A Farrer, Brion S Maher, Carol A Prescott, Danielle M Dick, Silviu A Bacanu, Laura D Mathies, Andrew G Davies, Vladimir I Vladimirov, Mike Grotewiel, M Scott Bowers, Jill C Bettinger, Bradley T Webb, Michael F Miles, Kenneth S Kendler, Brien P Riley
BACKGROUND: Alcohol Dependence (AD) shows evidence for genetic liability, but genes influencing risk remain largely unidentified. METHODS: We conducted a genomewide association study in 706 related AD cases and 1748 unscreened population controls from Ireland. We sought replication in 15,496 samples of European descent. We used model organisms to assess the role of orthologous genes in ethanol response behaviors. We tested one primate-specific gene for expression differences in case/control post-mortem brain tissue...
February 22, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28225595/colorimetric-and-electrochemical-bacteria-detection-using-printed-paper-and-transparency-based-analytic-devices
#10
Jaclyn A Adkins, Katherine Boehle, Colin Friend, Briana Chamberlain, Bledar Bisha, Charles S Henry
The development of transparency-based electrochemical and paper-based colorimetric analytic detection platforms is presented as complementary methods for food and waterborne bacteria detection from a single assay. Escherichia coli and Enterococcus species, both indicators of fecal contamination, were detected using substrates specific to enzymes produced by each species. β-galactosidase (β-gal) and β-glucuronidase (β-glucur) are both produced by E. coli, while β-glucosidase (β-gluco) is produced by Enterococcus spp...
March 7, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28212749/comparative-analysis-of-single-cell-rna-sequencing-methods
#11
Christoph Ziegenhain, Beate Vieth, Swati Parekh, Björn Reinius, Amy Guillaumet-Adkins, Martha Smets, Heinrich Leonhardt, Holger Heyn, Ines Hellmann, Wolfgang Enard
Single-cell RNA sequencing (scRNA-seq) offers new possibilities to address biological and medical questions. However, systematic comparisons of the performance of diverse scRNA-seq protocols are lacking. We generated data from 583 mouse embryonic stem cells to evaluate six prominent scRNA-seq methods: CEL-seq2, Drop-seq, MARS-seq, SCRB-seq, Smart-seq, and Smart-seq2. While Smart-seq2 detected the most genes per cell and across cells, CEL-seq2, Drop-seq, MARS-seq, and SCRB-seq quantified mRNA levels with less amplification noise due to the use of unique molecular identifiers (UMIs)...
February 16, 2017: Molecular Cell
https://www.readbyqxmd.com/read/28202543/nucleosome-like-ssdna-histone-octamer-complexes-and-the-implication-for-dna-double-strand-break-repair
#12
Nicholas L Adkins, Sarah G Swygert, Parminder Kaur, Hengyao Niu, Sergei A Grigoryev, Patrick Sung, Hong Wang, Craig L Peterson
Repair of DNA double strand breaks (DSBs) is key for maintenance of genome integrity. When DSBs are repaired by homologous recombination, DNA ends can undergo extensive processing, producing long stretches of single-stranded DNA (ssDNA). In vivo, DSB processing occurs in the context of chromatin, and studies indicate that histones may remain associated with processed DSBs. Here we demonstrate that histones are not evicted from ssDNA after in vitro chromatin resection. In addition, we reconstitute histone-ssDNA complexes (termed ssNucs) with ssDNA and recombinant histones and analyze these particles by a combination of native gel electrophoresis, sedimentation velocity, electron microscopy, and a recently developed electrostatic force microscopy technique, DREEM (Dual-Resonance-frequency-Enhanced Electrostatic force Microscopy)...
February 15, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28197837/the-visual-perception-of-distance-ratios-outdoors
#13
J Farley Norman, Olivia C Adkins, Catherine J Dowell, Lindsey M Shain, Stevie C Hoyng, Jonathan D Kinnard
We conducted an experiment to evaluate the ability of 32 younger and older adults to visually perceive distances in an outdoor setting. On any given trial, the observers viewed 2 environmental distances and were required to estimate the distance ratio-the length of the (usually) larger distance relative to that of the shorter. The stimulus distance ratios ranged from 1.0 (the stimulus distances were identical) to 8.0 (1 distance interval was 8.0 times longer than the other). The stimulus distances were presented within a 26 m × 60 m portion of a grassy field...
February 14, 2017: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/28196272/deep-sequencing-of-71-candidate-genes-to-characterize-variation-associated-with-alcohol-dependence
#14
Shaunna L Clark, Daniel E Adkins, Gaurav Kumar, Karolina A Aberg, Sri Nerella, Linying Xie, Ann L Collins, James J Crowley, Corey R Quackenbush, Christopher E Hilliard, Andrey A Shabalin, Scott I Vrieze, Roseann E Peterson, William E Copeland, Judy L Silberg, Matt McGue, Hermine Maes, William G Iacono, Patrick F Sullivan, Elizabeth J Costello, Edwin J van den Oord
BACKGROUND: Previous genome-wide association studies (GWASs) have identified a number of putative risk loci for alcohol dependence (AD). However, only a few loci have replicated and these replicated variants only explain a small proportion of AD risk. Using an innovative approach, the goal of this study was to generate hypotheses about potentially causal variants for AD that can be explored further through functional studies. METHODS: We employed targeted capture of 71 candidate loci and flanking regions followed by next-generation deep sequencing (mean coverage 78X) in 806 European Americans...
February 14, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28188186/nccn-guidelines-insights-bone-cancer-version-2-2017
#15
J Sybil Biermann, Warren Chow, Damon R Reed, David Lucas, Douglas R Adkins, Mark Agulnik, Robert S Benjamin, Brian Brigman, G Thomas Budd, William T Curry, Aarati Didwania, Nicola Fabbri, Francis J Hornicek, Joseph B Kuechle, Dieter Lindskog, Joel Mayerson, Sean V McGarry, Lynn Million, Carol D Morris, Sujana Movva, Richard J O'Donnell, R Lor Randall, Peter Rose, Victor M Santana, Robert L Satcher, Herbert Schwartz, Herrick J Siegel, Katherine Thornton, Victor Villalobos, Mary Anne Bergman, Jillian L Scavone
The NCCN Guidelines for Bone Cancer provide interdisciplinary recommendations for treating chordoma, chondrosarcoma, giant cell tumor of bone, Ewing sarcoma, and osteosarcoma. These NCCN Guidelines Insights summarize the NCCN Bone Cancer Panel's guideline recommendations for treating Ewing sarcoma. The data underlying these treatment recommendations are also discussed.
February 2017: Journal of the National Comprehensive Cancer Network: JNCCN
https://www.readbyqxmd.com/read/28187172/generation-of-dendritic-cell-based-vaccine-using-high-hydrostatic-pressure-for-non-small-cell-lung-cancer-immunotherapy
#16
Nada Hradilova, Lenka Sadilkova, Ondrej Palata, Dagmar Mysikova, Hana Mrazkova, Robert Lischke, Radek Spisek, Irena Adkins
High hydrostatic pressure (HHP) induces immunogenic death of tumor cells which confer protective anti-tumor immunity in vivo. Moreover, DC pulsed with HHP-treated tumor cells induced therapeutic effect in mouse cancer model. In this study, we tested the immunogenicity, stability and T cell stimulatory activity of human monocyte-derived dendritic cell (DC)-based HHP lung cancer vaccine generated in GMP compliant serum free medium using HHP 250 MPa. DC pulsed with HHP-killed lung cancer cells and poly(I:C) enhanced DC maturation, chemotactic migration and production of pro-inflammatory cytokines after 24h...
2017: PloS One
https://www.readbyqxmd.com/read/28186961/combination-epigenetic-therapy-in-metastatic-colorectal-cancer-mcrc-with-subcutaneous-5-azacitidine-and-entinostat-a-phase-2-consortium-stand-up-2-cancer-study
#17
Nilofer S Azad, Anthony El-Khoueiry, Jun Yin, Ann L Oberg, Patrick Flynn, Douglas Adkins, Anup Sharma, Daniel J Weisenberger, Thomas Brown, Prakriti Medvari, Peter A Jones, Hariharan Easwaran, Ihab Kamel, Nathan Bahary, George Kim, Joel Picus, Henry C Pitot, Charles Erlichman, Ross Donehower, Hui Shen, Peter W Laird, Richard Piekarz, Stephen Baylin, Nita Ahuja
PURPOSE: Therapy with demethylating agent 5-azacitidine and histone deacetylase inhibitor entinostat shows synergistic re-expression of tumor-suppressor genes and growth inhibition in colorectal (CRC) cell lines and in vivo studies. EXPERIMENTAL DESIGN: We conducted a phase II, multi-institutional study of the combination in metastatic CRC patients. Subcutaneous azacitidine was administered at 75 mg/m2 days 1-5 and 8-10 and entinostat was given 7 mg orally on days 3 and 10...
February 5, 2017: Oncotarget
https://www.readbyqxmd.com/read/28169847/sedation-strategies-for-extracorporeal-membrane-oxygenation-support
#18
Kandis L Adkins
No abstract text is available yet for this article.
March 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28154890/single-nucleotide-polymorphisms-in-the-fc%C3%AE-r3a-and-tap1-genes-impact-adcc-in-cynomolgus-monkey-pbmcs
#19
Jonathan C Sanford, Hong Wu, Yasmina Abdiche, Julie A Harney, Javier Chaparro-Riggers, Karissa Adkins
Phenotypic variability is often observed in cynomolgus monkeys on preclinical studies and may, in part, be driven by genetic variability. However, the role of monkey genetic variation remains largely unexplored in the context of drug response. This study evaluated genetic variation in cynomolgus monkey FcγR3A and TAP1 genes and the potential impact of identified polymorphisms on antibody-dependent cell-mediated cytotoxicity (ADCC) in vitro. Studies in humans have demonstrated that a single nucleotide polymorphism (SNP), F158V, in FcγR3A can influence response to rituximab through altered ADCC and that SNPs in TAP1/2 decrease natural killer (NK) cell activity against major histocompatibility complex (MHC) class I deficient cells, potentially through altered ADCC...
February 3, 2017: Immunogenetics
https://www.readbyqxmd.com/read/28152564/age-of-onset-and-family-history-as-indicators-of-polygenic-risk-for-major-depression
#20
Anna R Docherty, Alexis C Edwards, Fuzhong Yang, Roseann E Peterson, Chelsea Sawyers, Daniel E Adkins, Ashlee A Moore, Bradley T Webb, Silviu A Bacanu, Jonathan Flint, Kenneth S Kendler
BACKGROUND: The extent to which earlier age of onset (AO) is a reflection of increased genetic risk for major depression (MD) is still unknown. Previous biometrical research has provided mixed empirical evidence for the genetic overlap of AO with MD. If AO is demonstrated to be relevant to molecular polygenic risk for MD, incorporation of AO as a phenotype could enhance future genetic studies. METHODS: This research estimated the SNP-based heritability of AO in the China, Oxford and VCU Experimental Research on Genetic Epidemiology (CONVERGE) case-control sample (N = 9,854; MD case, n = 4,927)...
February 2, 2017: Depression and Anxiety
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