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https://www.readbyqxmd.com/read/29136125/effective-connectivity-measured-using-optogenetically-evoked-hemodynamic-signals-exhibits-topography-distinct-from-resting-state-functional-connectivity-in-the-mouse
#1
Adam Q Bauer, Andrew W Kraft, Grant A Baxter, Patrick W Wright, Matthew D Reisman, Annie R Bice, Jasmine J Park, Michael R Bruchas, Abraham Z Snyder, Jin-Moo Lee, Joseph P Culver
Brain connectomics has expanded from histological assessment of axonal projection connectivity (APC) to encompass resting state functional connectivity (RS-FC). RS-FC analyses are efficient for whole-brain mapping, but attempts to explain aspects of RS-FC (e.g., interhemispheric RS-FC) based on APC have been only partially successful. Neuroimaging with hemoglobin alone lacks specificity for determining how activity in a population of cells contributes to RS-FC. Wide-field mapping of optogenetically defined connectivity could provide insights into the brain's structure-function relationship...
November 9, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/29135938/effects-of-a-lutein-and-zeaxanthin-intervention-on-cognitive-function-a-randomized-double-masked-placebo-controlled-trial-of-younger-healthy-adults
#2
Lisa M Renzi-Hammond, Emily R Bovier, Laura M Fletcher, L Stephen Miller, Catherine M Mewborn, Cutter A Lindbergh, Jeffrey H Baxter, Billy R Hammond
Background: Past studies have suggested that higher lutein (L) and zeaxanthin (Z) levels in serum and in the central nervous system (as quantified by measuring macular pigment optical density, MPOD) are related to improved cognitive function in older adults. Very few studies have addressed the issue of xanthophylls and cognitive function in younger adults, and no controlled trials have been conducted to date to determine whether or not supplementation with L + Z can change cognitive function in this population...
November 14, 2017: Nutrients
https://www.readbyqxmd.com/read/29130139/portable-abdomen-radiography-moving-to-thickness-based-protocols
#3
Adrian A Sánchez, Ingrid Reiser, Tina Baxter, Yue Zhang, Joshua H Finkle, Zheng Feng Lu, Kate A Feinstein
BACKGROUND: Default pediatric protocols on many digital radiography systems are configured based on patient age. However, age does not adequately characterize patient size, which is the principal determinant of proper imaging technique. Use of default pediatric protocols by inexperienced technologists can result in patient overexposure, inadequate image quality, or repeated examinations. OBJECTIVE: To ensure diagnostic image quality at a well-managed patient radiation exposure by transitioning to thickness-based protocols for pediatric portable abdomen radiography...
November 12, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/29129157/thrombectomy-6-to-24-hours-after-stroke-with-a-mismatch-between-deficit-and-infarct
#4
Raul G Nogueira, Ashutosh P Jadhav, Diogo C Haussen, Alain Bonafe, Ronald F Budzik, Parita Bhuva, Dileep R Yavagal, Marc Ribo, Christophe Cognard, Ricardo A Hanel, Cathy A Sila, Ameer E Hassan, Monica Millan, Elad I Levy, Peter Mitchell, Michael Chen, Joey D English, Qaisar A Shah, Frank L Silver, Vitor M Pereira, Brijesh P Mehta, Blaise W Baxter, Michael G Abraham, Pedro Cardona, Erol Veznedaroglu, Frank R Hellinger, Lei Feng, Jawad F Kirmani, Demetrius K Lopes, Brian T Jankowitz, Michael R Frankel, Vincent Costalat, Nirav A Vora, Albert J Yoo, Amer M Malik, Anthony J Furlan, Marta Rubiera, Amin Aghaebrahim, Jean-Marc Olivot, Wondwossen G Tekle, Ryan Shields, Todd Graves, Roger J Lewis, Wade S Smith, David S Liebeskind, Jeffrey L Saver, Tudor G Jovin
Background The effect of endovascular thrombectomy that is performed more than 6 hours after the onset of ischemic stroke is uncertain. Patients with a clinical deficit that is disproportionately severe relative to the infarct volume may benefit from late thrombectomy. Methods We enrolled patients with occlusion of the intracranial internal carotid artery or proximal middle cerebral artery who had last been known to be well 6 to 24 hours earlier and who had a mismatch between the severity of the clinical deficit and the infarct volume, with mismatch criteria defined according to age (<80 years or ≥80 years)...
November 11, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/29119796/supported-lipid-bilayers-with-phosphatidylethanolamine-as-the-major-component
#5
Anne M Sendecki, Matthew F Poyton, Alexis J Baxter, Tinglu Yang, Paul S Cremer
Phosphatidylethanolamine (PE) is notoriously difficult to incorporate into model membrane systems, such as fluid supported lipid bilayers (SLBs), at high concentrations because of its intrinsic negative curvature. Using fluorescence-based techniques, we demonstrate that having fewer sites of unsaturation in the lipid tails leads to high-quality SLBs because these lipids help to minimize the curvature. Moreover, shorter saturated chains can help maintain the membranes in the fluid phase. Using these two guidelines, we find that up to 70 mol % PE can be incorporated into SLBs at room temperature and up to 90 mol % PE can be incorporated at 37 °C...
November 9, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29116831/clinician-friendly-physical-performance-tests-for-the-knee
#6
Jerrod J Harrison, Marissa K Yorgey, Alexander J Csiernik, Joseph H Vogler, Kenneth E Games
Reference:  Hegedus EJ, McDonough S, Bleakley C, Cook CE, Baxter GD. Clinician-friendly lower extremity physical performance measures in athletes: a systematic review of measurement properties and correlation with injury. Part 1: the tests for knee function including the hop tests. Br J Sports Med. 2015;49(10):642-648. CLINICAL QUESTION:   Do individual physical performance tests (PPTs) used as measures for lower extremity function have any relationship to injuries in athletes aged 12 years or older? DATA SOURCES:   Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were used to locate articles...
November 8, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/29113642/prefrontal-thalamic-anatomical-connectivity-and-executive-cognitive-function-in-schizophrenia
#7
Monica Giraldo-Chica, Baxter P Rogers, Stephen M Damon, Bennett A Landman, Neil D Woodward
BACKGROUND: Executive cognitive functions, including working memory, cognitive flexibility, and inhibition, are impaired in schizophrenia. Executive functions rely on coordinated information processing between the prefrontal cortex (PFC) and thalamus, particularly the mediodorsal nucleus. This raises the possibility that anatomical connectivity between the PFC and mediodorsal thalamus may be 1) reduced in schizophrenia and 2) related to deficits in executive function. The current investigation tested these hypotheses...
September 28, 2017: Biological Psychiatry
https://www.readbyqxmd.com/read/29113549/the-final-30-days-of-life-a-study-of-patients-with-gastrointestinal-cancer-in-ontario-canada
#8
Shaila J Merchant, Katherine Lajkosz, Susan B Brogly, Christopher M Booth, Sulaiman Nanji, Sunil V Patel, Nancy N Baxter
BACKGROUND: Studies have reported overly aggressive end-of-life care (EOLC) in many cancers. We investigate trends in, and factors associated with, aggressive EOLC among patients who died of gastrointestinal (GI) cancers in Ontario, Canada. METHODS: All patients with primary cause of death from esophageal, gastric, colon, and anorectal cancer from January 2003 to December 2013 were identified through the Ontario Cancer Registry, and information was collected from linked databases...
January 1, 2017: Journal of Palliative Care
https://www.readbyqxmd.com/read/29105812/response-of-the-mayfly-cloeon-dipterum-to-chronic-exposure-to-thiamethoxam-in-outdoor-mesocosms
#9
Daniel B Pickford, Meaghean C Finnegan, Leilan R Baxter, Walter Böhmer, Mark L Hanson, Petra Stegger, Udo Hommen, Paul F Hoekstra, Mick Hamer
Thiamethoxam (TMX) is a widely used neonicotinoid insecticide that has been detected in surface water monitoring programs in North America and Europe. This has led to questions about its toxicity to non-target insects, specifically those with an aquatic life stage. In order to address the uncertainty associated with possible impacts related to environmental exposures, a chronic (35-d) outdoor mesocosm study with a formulated product containing TMX was conducted. The specific focus of the study was the response of mayflies (Ephemeroptera), which have been reported to be particularly sensitive in laboratory studies...
November 4, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/29105167/directed-self-assembly-in-breath-figure-templating-of-melamine-based-amphiphilic-copolymers-effect-of-hydrophilic-length-end-chain-on-honeycomb-film-formation-and-wetting
#10
Laurent Billon, Hongyao Yin, Yujun Feng
Amphiphilic copolymers are widely used in fabricating hierarchically honeycomb-structured films via "breath figure" (BF) process as the hydrophilic block plays a key role in stabilizing water templating. However, the hydrophilic blocks reported are mainly confined to acrylic acid and its derivatives, the additional functions introduction on porous films, and the polymer composition/film microstructure relationship was less documented. In this work, a novel melamine-based hydrophilic moiety was incorporated to polystyrene chains by combining atom transfer radical polymerization and post modification to afford end-functionalized polystyrenes (PS-PANME)...
November 4, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29096056/salvinia-effect-inspired-sticky-superhydrophobic-surfaces-by-meniscus-confined-electrodeposition
#11
Deyin Zheng, Youhua Jiang, Wentao Yu, Xiufen Jiang, Xin Zhao, Chang-Hwan Choi, Guangyi Sun
Inspired by the Salvinia effect, we report the fabrication and characterization of a novel "sticky" superhydrophobic surface sustaining a Cassie-Baxter wetting state for water droplets with high contact angles but strong solid-liquid retention. Unlike superhydrophobic surfaces mimicking the lotus or petal effect, whose hydrophobicity and droplet retention are typically regulated by hierarchical micro- and nanostructures made of a homogeneous material with the same surface energy, our superhydrophobic surface merely requires singular microstructures covered with a hydrophobic coating but creatively coupled with hydrophilic tips with different surface energy...
November 14, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29095891/abundance-distribution-and-diversity-of-gelatinous-predators-along-the-northern-mid-atlantic-ridge-a-comparison-of-different-sampling-methodologies
#12
Aino Hosia, Tone Falkenhaug, Emily J Baxter, Francesc Pagès
The diversity and distribution of gelatinous zooplankton were investigated along the northern Mid-Atlantic Ridge (MAR) from June to August 2004.Here, we present results from macrozooplankton trawl sampling, as well as comparisons made between five different methodologies that were employed during the MAR-ECO survey. In total, 16 species of hydromedusae, 31 species of siphonophores and four species of scyphozoans were identified to species level from macrozooplankton trawl samples. Additional taxa were identified to higher taxonomic levels and a single ctenophore genus was observed...
2017: PloS One
https://www.readbyqxmd.com/read/29090526/a-pediatric-brain-tumor-consortium-phase-ii-trial-of-capecitabine-rapidly-disintegrating-tablets-with-concomitant-radiation-therapy-in-children-with-newly-diagnosed-diffuse-intrinsic-pontine-gliomas
#13
Lindsay B Kilburn, Mehmet Kocak, Patricia Baxter, Tina Young Poussaint, Arnold C Paulino, Christine McIntyre, Annabelle Lemenuel-Diot, Christine Lopez-Diaz, Larry Kun, Murali Chintagumpala, Jack M Su, Alberto Broniscer, Justin N Baker, Eugene I Hwang, Maryam Fouladi, James M Boyett, Susan M Blaney
BACKGROUND: We conducted a phase II study of oral capecitabine rapidly disintegrating tablets given concurrently with radiation therapy (RT) to assess progression-free survival (PFS) in children with newly diagnosed diffuse intrinsic pontine gliomas (DIPG). PATIENTS AND METHODS: Children 3-17 years with newly diagnosed DIPG were eligible. Capecitabine, 650 mg/m(2) /dose BID (maximum tolerated dose [MTD] in children with concurrent radiation), was administered for 9 weeks starting the first day of RT...
November 1, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/29082224/repeat-colonoscopy-within-6-months-after-initial-outpatient-colonoscopy-in-ontario-a-population-based-cross-sectional-study
#14
Lawrence Paszat, Rinku Sutradhar, Nancy N Baxter, Jill Tinmouth, Linda Rabeneck
BACKGROUND: The goal of this study is to examine utilization of early repeat colonoscopy ≤ 6 months after an index procedure. METHODS: We identified persons having repeat colonoscopy ≤ 6 months following outpatient colonoscopy without prior colonoscopy ≤ 5 years or prior diagnosis of colorectal cancer (CRC). We modeled repeat colonoscopy using a generalized estimating equation with an exchangeable correlation structure to account for clustering of patients by endoscopist...
2017: Canadian Journal of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/29077972/characterization-and-evaluation-of-lactic-acid-bacteria-candidates-for-intestinal-epithelial-permeability-and-salmonella-typhimurium-colonization-in-neonatal-turkey-poults
#15
Y Yang, J D Latorre, B Khatri, Y M Kown, B W Kong, K D Teague, L E Graham, A D Wolfenden, B D Mahaffey, M Baxter, X Hernandez-Velasco, R Merino-Guzman, B M Hargis, G Tellez
The present study evaluated the microbiological properties of three probiotic candidate strains of lactic acid bacteria (LAB) (128; 131; CE11_2), their effect on intestinal epithelial permeability, and their ability to reduce intestinal colonization of Salmonella Typhimurium (ST) individually or as a batch culture in neonatal turkey poults. Isolates were characterized morphologically and identified using 16S rRNA sequence analyses. Each isolate was evaluated for tolerance and resistance to acidic pH, high osmotic NaCl concentrations, and bile salts in broth medium...
October 25, 2017: Poultry Science
https://www.readbyqxmd.com/read/29074653/draft-genome-assembly-of-a-wolbachia-endosymbiont-of-plutella-australiana
#16
Christopher M Ward, Simon W Baxter
Wolbachia spp. are endosymbiotic bacteria that infect around 50% of arthropods and cause a broad range of effects, including manipulating host reproduction. Here, we present the annotated draft genome assembly of Wolbachia strain wAus, which infects Plutella australiana, a cryptic ally of the major Brassica pest Plutella xylostella (diamondback moth).
October 26, 2017: Genome Announcements
https://www.readbyqxmd.com/read/29071298/unique-configurations-of-compression-and-truncation-of-neuronal-activity-underlie-l-dopa-induced-selection-of-motor-patterns-in-aplysia
#17
Curtis L Neveu, Renan M Costa, Ryota Homma, Shin Nagayama, Douglas A Baxter, John H Byrne
A key issue in neuroscience is understanding the ways in which neuromodulators such as dopamine modify neuronal activity to mediate selection of distinct motor patterns. We addressed this issue by applying either low or high concentrations of l-DOPA (40 or 250 μM) and then monitoring activity of up to 130 neurons simultaneously in the feeding circuitry of Aplysia using a voltage-sensitive dye (RH-155). l-DOPA selected one of two distinct buccal motor patterns (BMPs): intermediate (low l-DOPA) or bite (high l-DOPA) patterns...
September 2017: ENeuro
https://www.readbyqxmd.com/read/29069500/srnanalyzer-a-flexible-and-customizable-small-rna-sequencing-data-analysis-pipeline
#18
Xiaogang Wu, Taek-Kyun Kim, David Baxter, Kelsey Scherler, Aaron Gordon, Olivia Fong, Alton Etheridge, David J Galas, Kai Wang
Although many tools have been developed to analyze small RNA sequencing (sRNA-Seq) data, it remains challenging to accurately analyze the small RNA population, mainly due to multiple sequence ID assignment caused by short read length. Additional issues in small RNA analysis include low consistency of microRNA (miRNA) measurement results across different platforms, miRNA mapping associated with miRNA sequence variation (isomiR) and RNA editing, and the origin of those unmapped reads after screening against all endogenous reference sequence databases...
October 24, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29065175/comparative-analysis-of-activation-induced-marker-aim-assays-for-sensitive-identification-of-antigen-specific-cd4-t-cells
#19
COMPARATIVE STUDY
Samantha Reiss, Amy E Baxter, Kimberly M Cirelli, Jennifer M Dan, Antigoni Morou, Audrey Daigneault, Nathalie Brassard, Guido Silvestri, Jean-Pierre Routy, Colin Havenar-Daughton, Shane Crotty, Daniel E Kaufmann
The identification and study of antigen-specific CD4 T cells, both in peripheral blood and in tissues, is key for a broad range of immunological research, including vaccine responses and infectious diseases. Detection of these cells is hampered by both their rarity and their heterogeneity, in particular with regards to cytokine secretion profiles. These factors prevent the identification of the total pool of antigen-specific CD4 T cells by classical methods. We have developed assays for the highly sensitive detection of such cells by measuring the upregulation of surface activation induced markers (AIM)...
2017: PloS One
https://www.readbyqxmd.com/read/29059077/the-microbiome-and-hiv-prevention-strategies-in-women
#20
Salim S Abdool Karim, Jo-Ann S Passmore, Cheryl Baxter
PURPOSE OF REVIEW: HIV prevention approaches that women can use and control are a priority. Results from topical and oral preexposure prophylaxis (PrEP) HIV prevention trials have produced inconsistent results in women. One of the main behavioural factors impacting effectiveness of PrEP has been suboptimal adherence. In this review, we examine biological factors that modulate topical PrEP efficacy, with particular focus on the vaginal microbiome. RECENT FINDINGS: Genital inflammation is an independent risk factor for HIV acquisition in women...
October 20, 2017: Current Opinion in HIV and AIDS
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