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https://www.readbyqxmd.com/read/28807685/an-rna-polymerase-ii-driven-ebola-virus-minigenome-system-as-an-advanced-tool-for-antiviral-drug-screening
#1
Emily V Nelson, Jennifer R Pacheco, Adam Hume, Tessa N Cressey, Laure R Deflubé, John B Ruedas, John H Connor, Hideki Ebihara, Elke Mühlberger
Ebola virus (EBOV) causes a severe disease in humans with the potential for significant international public health consequences. Currently, treatments are limited to experimental vaccines and therapeutics. Therefore, research into prophylaxis and antiviral strategies to combat EBOV infections is of utmost importance. The requirement for high containment laboratories to study EBOV infection is a limiting factor for conducting EBOV research. To overcome this issue, minigenome systems have been used as valuable tools to study EBOV replication and transcription mechanisms and to screen for antiviral compounds at biosafety level 2...
August 11, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28803544/overcoming-qrt-pcr-interference-by-select-carbon-nanotubes-in-assessments-of-gene-expression
#2
Sara T Humes, Shannon Hentschel, Candice M Lavelle, L Cody Smith, John A Lednicky, Navid B Saleh, Tara Sabo-Attwood
Nanomaterials (NMs) of various types, including carbon nanotubes (CNTs), can interfere with standard quantitative real-time PCR (qRT-PCR) assays, resulting in inaccurate gene expression measurements; however, the precise step in the qRT-PCR pipeline where this interference occurs has not been well described. Here, we investigated where in the process surface-oxidized multi-walled CNTs (oxMWNTs) inhibited qRT-PCR measurement of the expression of the housekeeping gene GAPDH and explored several strategies to minimize such inhibition...
August 1, 2017: BioTechniques
https://www.readbyqxmd.com/read/28803087/effect-of-prophylactic-fentanyl-buccal-tablet-on-episodic-exertional-dyspnea-a-pilot-double-blind-randomized-controlled-trial
#3
David Hui, Kelly Kilgore, Susan Frisbee-Hume, Minjeong Park, Diane Liu, Diwakar D Balachandran, Eduardo Bruera
CONTEXT: Episodic dyspnea is one of the most common, debilitating and difficult-to-treat symptoms. OBJECTIVE: We conducted a pilot study to examine the effect of prophylactic FBT on exercise-induced dyspnea. METHODS: In this parallel, double-blind randomized placebo-controlled trial, opioid-tolerant patients were asked to complete a 6 minute walk test (6MWT) at baseline, then a second 6MWT 30 minutes after a single dose of FBT (equivalent to 20-50% of their total opioid dose) or matching placebo...
August 9, 2017: Journal of Pain and Symptom Management
https://www.readbyqxmd.com/read/28795694/correlating-the-potentiometric-selectivity-of-cyclosporin-based-electrodes-with-binding-patterns-obtained-from-electrospray-ionization-mass-spectrometry
#4
Elsayed M Zahran, Ki-Jung Paeng, Ibrahim H A Badr, David Hume, Bert C Lynn, R Daniel Johnson, Leonidas G Bachas
Electrospray ionization mass spectrometry ESI-MS is a powerful technique for the characterization of macromolecules and their noncovalent binding with guest ions. We herein evaluate the feasibility of using ESI-MS as a screening tool for predicting potentiometric selectivities of ionophores. Ion-selective electrodes based on the cyclic peptide, cyclosporin A, were developed, and their potentiometric selectivity pattern was evaluated. Optimized electrodes demonstrated near-Nernstian slopes with micromolar detection limits toward calcium...
August 10, 2017: Analyst
https://www.readbyqxmd.com/read/28767708/physiological-stress-and-hendra-virus-in-flying-foxes-pteropus-spp-australia
#5
Lee McMichael, Daniel Edson, Craig Smith, David Mayer, Ina Smith, Steven Kopp, Joanne Meers, Hume Field
Pteropid bats (flying-foxes) are the natural reservoir of Hendra virus, an emergent paramyxovirus responsible for fatal infection in horses and humans in Australia. Pteropus alecto (the Black flying-fox) and the paraphyletic P. conspicillatus (the Spectacled flying-fox) appear to be the primary reservoir hosts. Previous studies have suggested that physiological and ecological factors may underpin infection dynamics in flying-foxes, and subsequent spillover to horses and in turn humans. We sought to examine temporal trends in urinary cortisol concentration in wild Australian flying-fox populations, to elucidate the putative relationship between Hendra virus infection and physiological stress...
2017: PloS One
https://www.readbyqxmd.com/read/28760770/transcriptional-mechanisms-that-control-expression-of-the-macrophage-colony-stimulating-factor-receptor-locus
#6
REVIEW
Rocio Rojo, Clare Pridans, David Langlais, David A Hume
The proliferation, differentiation, and survival of cells of the macrophage lineage depends upon signals from the macrophage colony-stimulating factor (CSF) receptor (CSF1R). CSF1R is expressed by embryonic macrophages and induced early in adult hematopoiesis, upon commitment of multipotent progenitors to the myeloid lineage. Transcriptional activation of CSF1R requires interaction between members of the E26 transformation-specific family of transcription factors (Ets) (notably PU.1), C/EBP, RUNX, AP-1/ATF, interferon regulatory factor (IRF), STAT, KLF, REL, FUS/TLS (fused in sarcoma/ranslocated in liposarcoma) families, and conserved regulatory elements within the mouse and human CSF1R locus...
August 15, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/28757084/outbreak-of-health-care-associated-burkholderia-cenocepacia-bacteremia-and-infection-attributed-to-contaminated-sterile-gel-used-for-central-line-insertion-under-ultrasound-guidance-and-other-procedures
#7
Ramon Z Shaban, Samuel Maloney, John Gerrard, Peter Collignon, Deborough Macbeth, Marilyn Cruickshank, Anna Hume, Amy V Jennison, Rikki M A Graham, Haakon Bergh, Heather L Wilson, Petra Derrington
BACKGROUND: We report an outbreak of Burkholderia cenocepacia bacteremia and infection in 11 patients predominately in intensive care units caused by contaminated ultrasound gel used in central line insertion and sterile procedures within 4 hospitals across Australia. METHODS: Burkholderia cenocepacia was first identified in the blood culture of a patient from the intensive care unit at the Gold Coast University Hospital on March 26, 2017, with 3 subsequent cases identified by April 7, 2017...
July 27, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28751473/identification-of-the-macrophage-specific-promoter-signature-in-fantom5-mouse-embryo-developmental-time-course-data
#8
Kim M Summers, David A Hume
The FANTOM5 consortium used cap analysis of gene expression (CAGE) to analyze the time course of gene expression over development from 11 days postcoitum (dpc) to adult in 16 developing organs and the whole body of the mouse. Every tissue in the body contains a large number of resident macrophages that initially infiltrate the embryo from the yolk sac. These cells contribute to organogenesis, and their functions diversify during development as they acquire tissue-specific adaptations. In each of the FANTOM5 time courses, the expression of known macrophage-specific genes, including CSF1 receptor (Csf1r), epidermal growth factor-like module-containing mucin-like hormone receptor-like 1 (Emr1), and mer receptor tyrosine kinase (Mertk), was readily detectable and increased with time...
July 27, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28746291/state-of-the-plastic-surgery-workforce-and-the-impact-of-graduate-medical-education-reform-on-training-of-plastic-surgeons
#9
Lindsay Janes, Steven T Lanier, Gregory R D Evans, Steven J Kasten, Keith M Hume, Arun K Gosain
BACKGROUND: Although recent estimates predict a large impending shortage of plastic surgeons, graduate medical education funding through the Centers for Medicare and Medicaid Services remains capped by the 1997 Balanced Budget Act. The authors' aim was to develop a plan to stimulate legislative action. METHODS: The authors reviewed responses of the American Society of Plastic Surgeons, American College of Surgeons, and American Medical Association from January of 2015 to a House Energy & Commerce Committee request for input on graduate medical education funding...
August 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28735803/transfusion-thresholds-for-major-orthopedic-surgery-a-systematic-review-and-meta-analysis
#10
Matthew D Mitchell, Joel S Betesh, Jaimo Ahn, Eric L Hume, Samir Mehta, Craig A Umscheid
BACKGROUND: More than a million surgeries are performed annually in the United States for hip or knee arthroplasty or hip fracture stabilization. One-fifth of these patients have blood transfusions during their hospital stay. Increases in transfusion rates have caused concern about increased adverse events from unnecessary transfusions. METHODS: We systematically reviewed randomized trials examining the effect of restrictive vs liberal transfusion thresholds on patients having major orthopedic surgery...
July 8, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28733061/mitochondrial-replacement-therapy-the-road-to-the-clinic-in-canada
#11
Bartha Maria Knoppers, Arthur Leader, Stacey Hume, Eric A Shoubridge, Rosario Isasi, Forough Noohi, Ubaka Ogbogu, Vardit Ravitsky, Erika Kleiderman
No abstract text is available yet for this article.
July 18, 2017: Journal of Obstetrics and Gynaecology Canada: JOGC, Journal D'obstétrique et Gynécologie du Canada: JOGC
https://www.readbyqxmd.com/read/28726806/data-sharing-as-a-national-quality-improvement-program-reporting-on-brca1-and-brca2-variant-interpretation-comparisons-through-the-canadian-open-genetics-repository-cogr
#12
Matthew S Lebo, Kathleen-Rose Zakoor, Kathy Chun, Marsha D Speevak, John S Waye, Elizabeth McCready, Jillian S Parboosingh, Ryan E Lamont, Harriet Feilotter, Ian Bosdet, Tracy Tucker, Sean Young, Aly Karsan, George S Charames, Ronald Agatep, Elizabeth L Spriggs, Caitlin Chisholm, Nasim Vasli, Hussein Daoud, Olga Jarinova, Robert Tomaszewski, Stacey Hume, Sherryl Taylor, Mohammad R Akbari, Jordan Lerner-Ellis
PurposeThe purpose of this study was to develop a national program for Canadian diagnostic laboratories to compare DNA-variant interpretations and resolve discordant-variant classifications using the BRCA1 and BRCA2 genes as a case study.MethodsBRCA1 and BRCA2 variant data were uploaded and shared through the Canadian Open Genetics Repository (COGR; http://www.opengenetics.ca). A total of 5,554 variant observations were submitted; classification differences were identified and comparison reports were sent to participating laboratories...
July 20, 2017: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/28724697/facts-and-values-on-the-acceptability-of-risks-in-children-s-sport-using-the-example-of-rugby-a-narrative-review
#13
REVIEW
Kenneth Lincoln Quarrie, John H M Brooks, Nicholas Burger, Patria A Hume, Steve Jackson
A clash of values has been identified between those who assert that:1. all childhood injuries, regardless of origin, are inherently undesirable and should be prevented and;2. those who believe that some measure of injury to children is an acceptable compromise for the physical benefits associated with physical activity and the development of abilities to appraise and deal with risks.A debate regarding whether the tackles and collisions permitted in schools' rugby represent acceptable risks, and what steps should be taken if they do not, exemplifies the issue...
August 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28722588/optimizing-direct-membrane-and-direct-skin-feeding-assays-for-plasmodium-falciparum-transmission-blocking-vaccine-trials-in-bancoumana-mali
#14
Mamadou B Coulibaly, Erin E Gabriel, Youssouf Sinaba, Daman Sylla, Adama Sacko, Lakamy Sylla, Boubacar Coulibaly, Jen C C Hume, Ibrahima Baber, Mahamadoun H Assadou, Issaka Sagara, Yimin Wu, Sara A Healy, Ogobara Doumbo, Sekou F Traore, Patrick E Duffy
Malaria transmission-blocking vaccines (TBV) have been evaluated in field trials in Mali, since 2013. However, the assays currently used to measure serum antibody TB activity (TBA) after vaccination are highly variable, in part due to the lack of optimization and standardization for field assays in which mosquitoes feed on gametocytemic blood. Herein, we report a study conducted in Bancoumana village, Mali, where we identify and optimize the parameters that contribute to successful mosquito feeding outcomes in both direct skin feeds (DSFs) and direct membrane feeding assays (DMFA)...
June 26, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28719564/the-new-apgar-score-a-checklist-to-enhance-quality-of-life-in-geriatric-patients-with-hip-fracture
#15
Joseph Bernstein, Sara Weintraub, Eric Hume, Mark D Neuman, Stephen L Kates, Jaimo Ahn
For geriatric patients with hip fractures, the broken bone is the reason for admission, but only part of the overall disease. Indeed, it may be more helpful to consider the patient having geriatric hip fracture syndrome or sustaining a hip attack, as there are many associated medical, social, psychological, and other problems to which attention must be paid. To that end, we have identified a series of 10 steps, collected into a checklist, that can be undertaken for all patients with geriatric hip fracture. In homage to the maxim "we come into the world under the brim of the pelvis and go out through the neck of the femur," we defined our checklist by the acronym APGAR SCORE, named after the classic checklist of the same name used to assess a newborn child...
July 19, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28698369/a-distinct-subpopulation-of-cd25-t-follicular-regulatory-cells-localizes-in-the-germinal-centers
#16
James Badger Wing, Yohko Kitagawa, Michela Locci, Hannah Hume, Christopher Tay, Takayoshi Morita, Yujiro Kidani, Kyoko Matsuda, Takeshi Inoue, Tomohiro Kurosaki, Shane Crotty, Cevayir Coban, Naganari Ohkura, Shimon Sakaguchi
T-follicular helper (Tfh) cells differentiate through a multistep process, culminating in germinal center (GC) localized GC-Tfh cells that provide support to GC-B cells. T-follicular regulatory (Tfr) cells have critical roles in the control of Tfh cells and GC formation. Although Tfh-cell differentiation is inhibited by IL-2, regulatory T (Treg) cell differentiation and survival depend on it. Here, we describe a CD25(-) subpopulation within both murine and human PD1(+)CXCR5(+)Foxp3(+) Tfr cells. It is preferentially located in the GC and can be clearly differentiated from CD25(+) non-GC-Tfr, Tfh, and effector Treg (eTreg) cells by the expression of a wide range of molecules...
August 1, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28688121/assessing-the-cost-of-implementing-the-2011-society-of-obstetricians-and-gynecologists-of-canada-and-canadian-college-of-medical-genetics-practice-guidelines-on-the-detection-of-fetal-aneuploidies
#17
Margaret Lilley, Stacey Hume, Nina Karpoff, Georges Maire, Sherry Taylor, Robert Tomaszewski, Maisa Yoshimoto, Susan Christian
BACKGROUND: The Society of Obstetricians and Gynecologists of Canada (SOGC) and the Canadian College of Medical Genetics (CCMG) published guidelines, in 2011, recommending replacement of karyotype with QF-PCR when prenatal testing is performed because of an increased risk of a common aneuploidy. STUDY OBJECTIVE: This study's objective is to perform a cost analysis following the implementation of QF-PCR as a stand-alone test. RESULTS: A total of 658 samples were received between April 1, 2014 and August 31, 2015: 576 amniocentesis samples and 82 CVS...
July 8, 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28687060/safety-limit-warning-levels-for-the-avoidance-of-excessive-sound-amplification-to-protect-against-further-hearing-loss
#18
Earl E Johnson
OBJECTIVE: To determine safe output sound pressure levels (SPL) for sound amplification devices to preserve hearing sensitivity after usage. DESIGN: A mathematical model consisting of the Modified Power Law (MPL) (Humes & Jesteadt, 1991 ) combined with equations for predicting temporary threshold shift (TTS) and subsequent permanent threshold shift (PTS) (Macrae, 1994b ) was used to determine safe output SPL. STUDY SAMPLE: The study involves no new human subject measurements of loudness tolerance or threshold shifts...
July 7, 2017: International Journal of Audiology
https://www.readbyqxmd.com/read/28685291/filovirus-strategies-to-escape-antiviral-responses
#19
Judith Olejnik, Adam J Hume, Daisy W Leung, Gaya K Amarasinghe, Christopher F Basler, Elke Mühlberger
This chapter describes the various strategies filoviruses use to escape host immune responses with a focus on innate immune and cell death pathways. Since filovirus replication can be efficiently blocked by interferon (IFN), filoviruses have evolved mechanisms to counteract both type I IFN induction and IFN response signaling pathways. Intriguingly, marburg- and ebolaviruses use different strategies to inhibit IFN signaling. This chapter also summarizes what is known about the role of IFN-stimulated genes (ISGs) in filovirus infection...
July 8, 2017: Current Topics in Microbiology and Immunology
https://www.readbyqxmd.com/read/28666005/genetic-structure-of-coral-symbiodinium-symbioses-on-the-world-s-warmest-reefs
#20
Edward G Smith, Benjamin C C Hume, Patrice Delaney, Jörg Wiedenmann, John A Burt
Corals in the Arabian/Persian Gulf (PAG) survive extreme sea temperatures (summer mean: >34°C), and it is unclear whether these corals have genetically adapted or physiologically acclimated to these conditions. In order to elucidate the processes involved in the thermal tolerance of PAG corals, it is essential to understand the connectivity between reefs within and outside of the PAG. To this end, this study set out to investigate the genetic structure of the coral, Platygyra daedalea, and its symbiotic algae in the PAG and neighbouring Gulf of Oman...
2017: PloS One
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