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https://www.readbyqxmd.com/read/28100734/does-the-superior-colliculus-control-perceptual-sensitivity-or-choice-bias-during-attention-evidence-from-a-multialternative-decision-framework
#1
Devarajan Sridharan, Nicholas A Steinmetz, Tirin Moore, Eric I Knudsen
: Distinct networks in the forebrain and the midbrain coordinate to control spatial attention. The critical involvement of the superior colliculus (SC)-the central structure in the midbrain network-in visuospatial attention has been shown by four seminal, published studies in monkeys (Macaca mulatta) performing multialternative tasks. However, due to the lack of a mechanistic framework for interpreting behavioral data in such tasks, the nature of the SC's contribution to attention remains unclear...
January 18, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28097665/pharmacokinetics-and-selected-pharmacodynamics-of-romifidine-following-low-dose-intravenous-administration-in-combination-with-exercise-to-quarter-horses
#2
H K Knych, S D Stanley, D S McKemie, S J Steinmetz
Romifidine is an alpha-2 adrenergic agonist used for sedation and analgesia in horses. As it is a prohibited substance, its purported use at low doses in performance horses necessitates further study. The primary goal of the study reported here was to describe the serum concentrations and pharmacokinetics of romifidine following low-dose administration immediately prior to exercise, utilizing a highly sensitive liquid chromatography-tandem mass spectrometry assay that is currently employed in many drug testing laboratories...
January 17, 2017: Journal of Veterinary Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28072508/repealing-federal-health-reform-economic-and-employment-consequences-for-states
#3
Leighton Ku, Erika Steinmetz, Erin Brantley, Brian Bruen
Issue: The incoming Trump administration and Republicans in Congress are seeking to repeal the Affordable Care Act (ACA), likely beginning with the law’s insurance premium tax credits and expansion of Medicaid eligibility. Research shows that the loss of these two provisions would lead to a doubling of the number of uninsured, higher uncompensated care costs for providers, and higher taxes for low-income Americans. Goal: To determine the state-by-state effect of repeal on employment and economic activity...
2017: Issue Brief of the Commonwealth Fund
https://www.readbyqxmd.com/read/28070572/electrostatic-layer-by-layer-construction-of-fibrous-tmv-biofilms
#4
Brylee David B Tiu, Daniel L Kernan, Sicily B Tiu, Amy M Wen, Yi Zheng, Jonathan K Pokorski, Rigoberto C Advincula, Nicole F Steinmetz
As nature's choice in designing complex architectures, the bottom-up assembly of nanoscale building blocks offers unique solutions in achieving more complex and smaller morphologies with wide-ranging applications in medicine, energy, and materials science as compared to top-down manufacturing. In this work, we employ charged tobacco mosaic virus (TMV-wt and TMV-lys) nanoparticles in constructing multilayered fibrous networks via electrostatic layer-by-layer (LbL) deposition. In neutral aqueous media, TMV-wt assumes an anionic surface charge...
January 10, 2017: Nanoscale
https://www.readbyqxmd.com/read/28063980/plant-viral-nanoparticles-based-her2-vaccine-immune-response-influenced-by-differential-transport-localization-and-cellular-interactions-of-particulate-carriers
#5
Sourabh Shukla, Jay T Myers, Sarah E Woods, Xingjian Gong, Anna E Czapar, Ulrich Commandeur, Alex Y Huang, Alan D Levine, Nicole F Steinmetz
Cancer vaccines are designed to elicit an endogenous adaptive immune response that can successfully recognize and eliminate residual or recurring tumors. Such approaches can potentially overcome shortcomings of passive immunotherapies by generating long-lived therapeutic effects and immune memory while limiting systemic toxicities. A critical determinant of vaccine efficacy is efficient transport and delivery of tumor-associated antigens to professional antigen presenting cells (APCs). Plant viral nanoparticles (VNPs) with natural tropism for APCs and a high payload carrying capacity may be particularly effective vaccine carriers...
December 27, 2016: Biomaterials
https://www.readbyqxmd.com/read/28041551/-haemostatic-resuscitation-in-bleeding-trauma-patients
#6
Jakob Stensballe, Pär I Johansson, Jacob Steinmetz
Trauma haemorrhage is a common reversible cause of death. Haemostatic resuscitation focuses on replacing the lost blood with transfusions equivalent to whole blood as early as possible. In Denmark, the optimal ratio for transfusions in massive bleeding is four packs of red blood cells, four packs of plasma and one pool of platelets (equal to ratio 1:1:1 in USA). Haemostatic resuscitation also includes a restricted use of crystalloids, early tranexamic acid, and a goal-directed transfusion therapy by using viscoelastic haemostatic assays to detect coagulopathy and the need for additional transfusions or pro-haemostatics...
December 26, 2016: Ugeskrift for Laeger
https://www.readbyqxmd.com/read/28029526/measuring-the-transportation-needs-of-people-with-developmental-disabilities-a-means-to-social-inclusion
#7
Rania Wasfi, Madeleine Steinmetz-Wood, David Levinson
BACKGROUND: One of the major causes of social exclusion for people with developmental disability (PDD) is the inability to access different activities due to inadequate transportation services. OBJECTIVE: This research paper identifies transportation needs, and reasons for unmet, but desired untaken trips of adults with developmental disabilities in Hennepin County, Minnesota. We hypothesize that PDD cannot make trips they want to make due to personal and neighborhood characteristics...
October 20, 2016: Disability and Health Journal
https://www.readbyqxmd.com/read/28025392/ino80-represses-osmostress-induced-gene-expression-by-resetting-promoter-proximal-nucleosomes
#8
Eva Klopf, Heiko A Schmidt, Sandra Clauder-Münster, Lars M Steinmetz, Christoph Schüller
The conserved INO80 chromatin remodeling complex is involved in regulation of DNA damage repair, replication and transcription. It is commonly recruited to the transcription start region and contributes to the establishment of promoter-proximal nucleosomes. We find a substantial influence of INO80 on nucleosome dynamics and gene expression during stress induced transcription. Transcription induced by osmotic stress leads to genome-wide remodeling of promoter proximal nucleosomes. INO80 function is required for timely return of evicted nucleosomes to the 5' end of induced genes...
December 25, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27992176/optical-and-magnetic-resonance-imaging-using-fluorous-colloidal-nanoparticles
#9
Jaqueline D Wallat, Anna E Czapar, Charlie Wang, Amy M Wen, Kristen S Wek, Xin Yu, Nicole F Steinmetz, Jonathan K Pokorski
Improved imaging of cancerous tissue has the potential to aid prognosis and improve patient outcome through longitudinal imaging of treatment response and disease progression. While nuclear imaging has made headway in cancer imaging, fluorinated tracers that enable magnetic resonance imaging ((19)F MRI) hold promise, particularly for repeated imaging sessions because nonionizing radiation is used. Fluorine MRI detects molecular signatures by imaging a fluorinated tracer and takes advantage of the spatial and anatomical resolution afforded by MRI...
December 19, 2016: Biomacromolecules
https://www.readbyqxmd.com/read/27974866/cd4-t-cell-fate-in-glomerulonephritis-a-tale-of-th1-th17-and-novel-treg-subtypes
#10
REVIEW
Christan F Krebs, Oliver M Steinmetz
Multiple studies have identified CD4(+) T cells as central players of glomerulonephritis (GN). Cells of the Th1 and Th17 responses cause renal tissue damage, while Tregs mediate protection. Recently, a high degree of plasticity among these T cell lineages was proposed. During inflammation, Th17 cells were shown to have the potential of transdifferentiation into Th1, Th2, or alternatively anti-inflammatory Tr1 cells. Currently available data from studies in GN, however, do not indicate relevant Th17 to Th1 or Th2 conversion, leaving the Th17 cell fate enigmatic...
2016: Mediators of Inflammation
https://www.readbyqxmd.com/read/27966976/interaction-of-b12f12-2-with-all-cis-1-2-3-4-5-6-hexafluorocyclohexane-in-the-gas-phase
#11
Michael J Lecours, Rick A Marta, Vincent Steinmetz, Neil Keddie, Eric Fillion, David O'Hagan, Terrance B McMahon, W Scott Hopkins
Clusters of all-cis 1,2,3,4,5,6-hexafluorocyclohexane and the dodecafluorododecaboron dianion, [C6F6H6]n[B12F12](2-) (n = 0-4), are investigated in a combined experimental and computational study. DFT calculations and IRMPD spectra in the region of 800-2000 cm(-1) indicate that C6H6F6 binds to open trigonal faces of B12F12(2-) via a three-point interlocking binding motif. Calculated binding interactions reveal substantial contributions from C-H···F hydrogen bonding and binding energies that are among the strongest observed for a neutral-anion system...
December 14, 2016: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/27939577/utility-of-the-roche-cobas-4800-for-detection-of-high-risk-human-papillomavirus-in-formalin-fixed-paraffin-embedded-oropharyngeal-squamous-cell-carcinoma
#12
Jason R Pettus, Terri L Wilson, Heather B Steinmetz, Joel A Lefferts, Laura J Tafe
Clinical laboratories are expected to reliably identify human papilloma virus (HPV) associated oropharyngeal squamous cell carcinoma (OPSCC) for prognostic and potential therapeutic applications. In addition to surrogate p16 immunohistochemistry (IHC) testing, DNA-based HPV-specific testing strategies are widely utilized. Recognizing the efficiency of the Roche Cobas 4800 platform for testing gynecological cytology specimens for high-risk HPV, we elected to evaluate the potential utility of this platform for testing formalin-fixed paraffin-embedded (FFPE) OPSCC tissue...
December 7, 2016: Experimental and Molecular Pathology
https://www.readbyqxmd.com/read/27938373/pre-hospital-transfusion-of-plasma-in-hemorrhaging-trauma-patients-independently-improves-hemostatic-competence-and-acidosis
#13
Hanne H Henriksen, Elaheh Rahbar, Lisa A Baer, John B Holcomb, Bryan A Cotton, Jacob Steinmetz, Sisse R Ostrowski, Jakob Stensballe, Pär I Johansson, Charles E Wade
BACKGROUND: The early use of blood products has been associated with improved patient outcomes following severe hemorrhage or traumatic injury. We aimed to investigate the influence of pre-hospital blood products (i.e. plasma and/or RBCs) on admission hemostatic properties and patient outcomes. We hypothesized that pre-hospital plasma would improve hemostatic function as evaluated by rapid thrombelastography (rTEG). METHODS: We conducted a prospective observational study recruiting 257 trauma patients admitted to a Level I trauma center having received either blood products pre-hospital or in-hospital within 6 hours of admission...
December 9, 2016: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
https://www.readbyqxmd.com/read/27934763/selective-modulation-of-cortical-state-during-spatial-attention
#14
Tatiana A Engel, Nicholas A Steinmetz, Marc A Gieselmann, Alexander Thiele, Tirin Moore, Kwabena Boahen
Neocortical activity is permeated with endogenously generated fluctuations, but how these dynamics affect goal-directed behavior remains a mystery. We found that ensemble neural activity in primate visual cortex spontaneously fluctuated between phases of vigorous (On) and faint (Off) spiking synchronously across cortical layers. These On-Off dynamics, reflecting global changes in cortical state, were also modulated at a local scale during selective attention. Moreover, the momentary phase of local ensemble activity predicted behavioral performance...
December 2, 2016: Science
https://www.readbyqxmd.com/read/27933965/first-structure-activity-relationship-of-17%C3%AE-hydroxysteroid-dehydrogenase-type-14-nonsteroidal-inhibitors-and-crystal-structures-in-complex-with-the-enzyme
#15
Florian Braun, Nicole Bertoletti, Gabriele Möller, Jerzy Adamski, Torsten Steinmetzer, Mohamed Salah, Ahmed S Abdelsamie, Chris J van Koppen, Andreas Heine, Gerhard Klebe, Sandrine Marchais-Oberwinkler
17β-HSD14 belongs to the SDR family and oxidizes the hydroxyl group at position 17 of estradiol and 5-androstenediol using NAD(+) as cofactor. The goal of this study was to identify and optimize 17β-HSD14 nonsteroidal inhibitors as well as to disclose their structure-activity relationship. In a first screen, a library of 17β-HSD1 and 17β-HSD2 inhibitors, selected with respect to scaffold diversity, was tested for 17β-HSD14 inhibition. The most interesting hit was taken as starting point for chemical modification applying a ligand-based approach...
December 8, 2016: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/27929166/intramolecular-cation-%C3%AF-interactions-in-protonated-phenylalanine-derivatives
#16
Weiqiang Fu, Patrick J J Carr, Michael J Lecours, Michael Burt, Rick A Marta, Vincent Steinmetz, Eric Fillion, Terrance B McMahon, W Scott Hopkins
The structures and properties of a series of phenylalanine (Phe) derivatives have been investigated in a joint computational and experimental infrared multiple photon dissociation (IRMPD) study. IRMPD spectra in the 1000-2000 cm(-1) region show that protonation is localized on the amine group in all cases. Intramolecular cation-π interactions between the ammonium group and the phenyl ring heavily influence molecular geometries and properties such as gas phase basicity and proton affinity. By varying substituents on the phenyl ring, one can sensitively tune the cation-π interaction and, therefore, the molecular structure and properties...
December 21, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27926356/inhibitory-control-of-correlated-intrinsic-variability-in-cortical-networks
#17
Carsen Stringer, Marius Pachitariu, Nicholas A Steinmetz, Michael Okun, Peter Bartho, Kenneth D Harris, Maneesh Sahani, Nicholas A Lesica
Cortical networks exhibit intrinsic dynamics that drive coordinated, large-scale fluctuations across neuronal populations and create noise correlations that impact sensory coding. To investigate the network-level mechanisms that underlie these dynamics, we developed novel computational techniques to fit a deterministic spiking network model directly to multi-neuron recordings from different rodent species, sensory modalities, and behavioral states. The model generated correlated variability without external noise and accurately reproduced the diverse activity patterns in our recordings...
December 7, 2016: ELife
https://www.readbyqxmd.com/read/27918104/quality-of-life-following-trauma-before-and-after-implementation-of-a-physician-staffed-helicopter
#18
K S Funder, L S Rasmussen, R Hesselfeldt, V Siersma, N Lohse, A Sonne, S Wulffeld, J Steinmetz
BACKGROUND: Implementation of a physician-staffed helicopter emergency medical service (PS-HEMS) in Denmark was associated with lower 30-day mortality in severely injured trauma patients and less time on social subsidy. However, the reduced 30-day mortality in severely injured patients might be at the expense of a worse functional outcome and quality of life (QoL) in those who survive. The aim of this study was to investigate the effect of a physician-staffed helicopter on long-term QoL in trauma patients...
January 2017: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/27914943/disadvantageous-decision-making-in-borderline-personality-disorder-partial-support-from-a-meta-analytic-review
#19
REVIEW
Christian Paret, Christine Jennen-Steinmetz, Christian Schmahl
To achieve long-term goals, organisms evaluate outcomes and expected consequences of their behaviors. Unfavorable decisions maintain many symptoms of borderline personality disorder (BPD); therefore, a better understanding of the mechanisms underlying decision-making in BPD is needed. In this review, the current literature comparing decision-making in patients with BPD versus healthy controls is analyzed. Twenty-eight empirical studies were identified through a structured literature search. The effect sizes from studies applying comparable experimental tasks were analyzed...
January 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/27914848/falls-cognitive-impairment-and-gait-performance-results-from-the-good-initiative
#20
Gilles Allali, Cyrille P Launay, Helena M Blumen, Michele L Callisaya, Anne-Marie De Cock, Reto W Kressig, Velandai Srikanth, Jean-Paul Steinmetz, Joe Verghese, Olivier Beauchet
OBJECTIVES: Falls are highly prevalent in individuals with cognitive decline. The complex relationship between falls and cognitive decline (including both subtype and severity of dementia) and the influence of gait disorders have not been studied. This study aimed to examine the association between the subtype (Alzheimer disease [AD] versus non-AD) and the severity (from preclinical to moderate dementia) of cognitive impairment and falls, and to establish an association between falls and gait parameters during the course of dementia...
November 30, 2016: Journal of the American Medical Directors Association
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