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https://www.readbyqxmd.com/read/28918088/evaluation-of-cerebrovascular-reactivity-in-subjects-with-and-without-obstructive-sleep-apnea
#1
Clodagh M Ryan, Anne Battisti-Charbonney, Olivia Sobczyk, David J Mikulis, James Duffin, Joseph A Fisher, Lashmi Venkatraghavan
BACKGROUND: Both obstructive sleep apnea (OSA) and altered cerebrovascular reactivity (CVR) are associated with increased stroke risk. Nevertheless, the incidence of abnormal CVR in patients with OSA is uncertain due to the high variability in the way CVR is measured both within and between studies. We hypothesized that a standardized CVR with a consistent vasoactive stimulus and cerebral blood flow (CBF) measure would be reduced in patients with severe OSA compared with healthy controls...
September 13, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28917460/clinical-and-pathologic-factors-associated-with-deep-transection-of-biopsies-of-invasive-melanoma
#2
Jamie L Woodcock, Zachary W Eyre, Gregory J Stoddard, Kristina Callis Duffin, Anneli R Bowen
No abstract text is available yet for this article.
October 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/28916704/delayed-neutrophil-apoptosis-enhances-net-formation-in-cystic-fibrosis
#3
Robert D Gray, Gareth Hardisty, Kate H Regan, Maeve Smith, Calum T Robb, Rodger Duffin, Annie Mackellar, Jennifer M Felton, Lily Paemka, Brian N McCullagh, Christopher D Lucas, David A Dorward, Edward F McKone, Gordon Cooke, Seamas C Donnelly, Pradeep K Singh, David A Stoltz, Christopher Haslett, Paul B McCray, Moira K B Whyte, Adriano G Rossi, Donald J Davidson
BACKGROUND: Cystic fibrosis (CF) lung disease is defined by large numbers of neutrophils and associated damaging products in the airway. Delayed neutrophil apoptosis is described in CF although it is unclear whether this is a primary neutrophil defect or a response to chronic inflammation. Increased levels of neutrophil extracellular traps (NETs) have been measured in CF and we aimed to investigate the causal relationship between these phenomena and their potential to serve as a driver of inflammation...
September 15, 2017: Thorax
https://www.readbyqxmd.com/read/28868035/a-novel-stress-diathesis-model-to-predict-risk-of-post-operative-delirium-implications-for-intra-operative-management
#4
Renée El-Gabalawy, Ronak Patel, Kayla Kilborn, Caitlin Blaney, Christopher Hoban, Lawrence Ryner, Duane Funk, Regina Legaspi, Joseph A Fisher, James Duffin, David J Mikulis, W Alan C Mutch
Introduction: Risk assessment for post-operative delirium (POD) is poorly developed. Improved metrics could greatly facilitate peri-operative care as costs associated with POD are staggering. In this preliminary study, we develop a novel stress-diathesis model based on comprehensive pre-operative psychiatric and neuropsychological testing, a blood oxygenation level-dependent (BOLD) magnetic resonance imaging (MRI) carbon dioxide (CO2) stress test, and high fidelity measures of intra-operative parameters that may interact facilitating POD...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28827210/mobile-app-to-streamline-the-development-of-wearable-sensor-based-exercise-biofeedback-systems-system-development-and-evaluation
#5
Martin O'Reilly, Joe Duffin, Tomas Ward, Brian Caulfield
BACKGROUND: Biofeedback systems that use inertial measurement units (IMUs) have been shown recently to have the ability to objectively assess exercise technique. However, there are a number of challenges in developing such systems; vast amounts of IMU exercise datasets must be collected and manually labeled for each exercise variation, and naturally occurring technique deviations may not be well detected. One method of combatting these issues is through the development of personalized exercise technique classifiers...
August 21, 2017: JMIR Rehabil Assist Technol
https://www.readbyqxmd.com/read/28809995/efficacy-and-safety-of-apremilast-in-patients-with-moderate-plaque-psoriasis-with-lower-bsa-week-16-results-from-the-unveil-study
#6
Bruce Strober, Jerry Bagel, Mark Lebwohl, Linda Stein Gold, J Mark Jackson, Rongdean Chen, Joana Goncalves, Eugenia Levi, Kristina Callis Duffin
<p>INTRODUCTION: Many options are available for patients with moderate to severe plaque psoriasis. Patients with moderate disease, however, are often undertreated and do not achieve satisfactory clearance. UNVEIL (NCT02425826) assessed efficacy and safety of apremilast in patients with chronic moderate plaque psoriasis.</p> <p>METHODS: Patients with psoriasis body surface area (BSA) 5% to 10% and static Physician's Global Assessment (sPGA) score of 3 (moderate) without prior exposure to systemics were randomized (2:1) to apremilast 30 mg twice daily or placebo for 16 weeks...
August 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28809994/the-static-physician-s-global-assessment-of-genitalia-a-clinical-outcome-measure-for-the-severity-of-genital-psoriasis
#7
Joseph F Merola, Alison Potts Bleakman, Alice B Gottlieb, Alan Menter, April N Naegeli, Robert Bissonnette, Lyn Guenther, John Sullivan, Kim Meeuwis, Kyoungah See, Kristina Callis Duffin
<p>Introduction: Genital psoriasis is a common but frequently overlooked manifestation of psoriasis with a considerable impact on patients' quality of life. Currently no validated clinical trial outcome measures exist to assess genital psoriasis severity that meet regulatory agency requirements.</p> <p>Methods: This study describes the development of the static Physician's Global Assessment of Genitalia (sPGA-G) scale, a clinical outcome measure for the assessment of genital psoriasis severity that accounts for the erythematous clinical presentation of genital psoriasis...
August 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28809992/international-dermatology-outcome-measures-ideom-group-2016-new-york-meeting-meeting-summary-and-data-from-the-psoriasis-working-group
#8
Lourdes M Perez-Chada, Sanminder Singh, Kristina Callis-Duffin, Amit Garg, Alice B Gottlieb, John Latella, April W Armstrong, Joseph F Merola
<p>The International Dermatology Outcome Measures (IDEOM) Group was established to develop validated and standardized patient-centered outcome measures in dermatology that meet the needs of stakeholders and can be used in clinical practice as well as clinical research. At this meeting, we aimed to define the final core domain set to be assessed in psoriasis clinical research and to identify which of the current psoriasis assessment instruments appropriately address those domains. Specifically, we sought to ascertain stakeholder input on domain match and feasibility of multiple psoriasis instruments...
August 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28806527/a-2d-substitutional-solid-solution-through-hydrogen-bonding-of-molecular-building-blocks
#9
Jennifer M MacLeod, Josh Lipton-Duffin, Chaoying Fu, Tyler Taerum, Dmitrii F Perepichka, Federico Rosei
Two-dimensional (2D) molecular self-assembly allows for the formation of well-defined supramolecular layers with tailored geometrical, compositional, and chemical properties. To date, random intermixing and entropic effects in these systems have largely been associated with crystalline disorder and glassy phases. Here we describe a 2D crystalline self-assembled molecular system that exhibits random incorporation of substitutional molecules. The lattice is formed from a mixture of trimesic acid (TMA) and terthienobenzenetricarboxylic acid (TTBTA), C3-symmetric hydrogen-bonding units of very different sizes (0...
August 21, 2017: ACS Nano
https://www.readbyqxmd.com/read/28782872/the-role-of-vascular-resistance-in-bold-responses-to-progressive-hypercapnia
#10
James Duffin, Olivia Sobczyk, Adrian Crawley, Julien Poublanc, Lashmi Venkatraghavan, Kevin Sam, Alan Mutch, David Mikulis, Joseph Fisher
The ability of the cerebral vasculature to regulate vascular diameter, hence resistance and cerebral blood flow (CBF), in response to metabolic demands (neurovascular coupling), and perfusion pressure changes (autoregulation) may be assessed by measuring the CBF response to carbon dioxide (CO2 ). In healthy individuals, the CBF response to a ramp CO2 stimulus from hypocapnia to hypercapnia is assumed sigmoidal or linear. However, other response patterns commonly occur, especially in individuals with cerebrovascular disease, and these remain unexplained...
August 7, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28780364/the-effect-of-secukinumab-on-moderate-to-severe-scalp-psoriasis-results-of-a-24-week-randomized-double-blind-placebo-controlled-phase-3b-study
#11
Jerry Bagel, Kristina Callis Duffin, Angela Moore, Laura K Ferris, Kimberly Siu, Jennifer Steadman, Farid Kianifard, Judit Nyirady, Mark Lebwohl
BACKGROUND: Moderate-to-severe scalp psoriasis has not been evaluated in prospective trials of patients without moderate-to-severe body psoriasis. OBJECTIVE: Evaluate the efficacy and safety of secukinumab in moderate-to-severe scalp psoriasis. METHODS: In this 24-week, double-blind, phase 3b study, 102 patients were randomized 1:1 to subcutaneous secukinumab 300 mg or placebo at baseline, weeks 1, 2, and 3, and then every 4 weeks from week 4 to 20...
October 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/28770938/the-role-of-halogens-in-on-surface-ullmann-polymerization
#12
Gianluca Galeotti, Marco Di Giovannantonio, Josh Lipton-Duffin, Maryam Ebrahimi, Stefano Tebi, Alberto Verdini, Luca Floreano, Yannick Fagot-Revurat, Dmitrii F Perepichka, Federico Rosei, Giorgio Contini
Ullmann coupling is the most common approach to form surface-confined one- and two-dimensional conjugated structures from haloaryl derivatives. The dimensions of the formed nanostructures can be controlled by the number and location of halogens within the molecular precursors. Our study illustrates that the type of halogen plays an essential role in the design, orientation, and extent of the surface-confined organometallic and polymeric nanostructures. We performed a comparative analysis of five 1,4-dihalobenzene molecules containing chlorine, bromine, and iodine on Cu(110) using scanning tunneling microscopy, fast-X-ray photoelectron and near edge X-ray absorption fine structure spectroscopies...
August 3, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28741972/the-effect-of-zirconium-doping-of-cerium-dioxide-nanoparticles-on-pulmonary-and-cardiovascular-toxicity-and-biodistribution-in-mice-after-inhalation
#13
Susan Dekkers, Mark R Miller, Roel P F Schins, Isabella Römer, Mike Russ, Rob J Vandebriel, Iseult Lynch, Marie-France Belinga-Desaunay, Eugenia Valsami-Jones, Shea P Connell, Ian P Smith, Rodger Duffin, John A F Boere, Harm J Heusinkveld, Catrin Albrecht, Wim H de Jong, Flemming R Cassee
Development and manufacture of nanomaterials is growing at an exponential rate, despite an incomplete understanding of how their physicochemical characteristics affect their potential toxicity. Redox activity has been suggested to be an important physicochemical property of nanomaterials to predict their biological activity. This study assessed the influence of redox activity by modification of cerium dioxide nanoparticles (CeO2 NPs) via zirconium (Zr) doping on the biodistribution, pulmonary and cardiovascular effects in mice following inhalation...
August 9, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28686319/magnetic-resonance-thermometry-of-flowing-blood
#14
Chinthaka C Heyn, Jonathan Bishop, Kyle Duffin, Wayne Lee, Jun Dazai, Shoshana Spring, Brian J Nieman, John G Sled
Blood temperature is a key determinant of tissue temperature and can be altered under normal physiological states, such as exercise, in diseases such as stroke or iatrogenically in therapies which modulate tissue temperature, such as therapeutic hypothermia. Currently available methods for the measurement of arterial and venous temperatures are invasive and, for small animal models, are impractical. Here, we present a methodology for the measurement of intravascular and tissue temperature by magnetic resonance imaging (MRI) using the lanthanide agent TmDOTMA(-) (DOTMA, tetramethyl-1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid; Tm, thulium)...
July 7, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28617118/not-enough-is-done-to-cut-risk-of-death-after-cardiac-arrest
#15
Christian Duffin
How much is being done to cut the number of people who die after cardiac arrests in public places? Not enough, says a group of cardiac experts and campaigners on the Out of Hospital Cardiac Arrest (OHCA) steering group.
June 15, 2017: Emergency Nurse: the Journal of the RCN Accident and Emergency Nursing Association
https://www.readbyqxmd.com/read/28600818/extension-of-ustekinumab-maintenance-dosing-interval-in-moderate-to-severe-psoriasis-results-of-a-phase-3b-randomized-double-blinded-active-controlled-multicenter-study-pstellar
#16
A Blauvelt, L K Ferris, P S Yamauchi, A Qureshi, C L Leonardi, K Farahi, S Fakharzadeh, M-C Hsu, S Li, M Chevrier, K Smith, K Goyal, Y Chen, E J Muñoz-Elías, K Callis Duffin
BACKGROUND: Phase 3 studies showed some patients maintained response for ≥6 months post-ustekinumab discontinuation. OBJECTIVES: To assess clinical responses with extended ustekinumab maintenance dosing intervals. METHODS: Adults with moderate-to-severe plaque psoriasis received ustekinumab (45mg/90mg for weight ≤100 kg/>100 kg) at Week0, Week4, Week16 during open-label treatment. Patients achieving a Week 28 Physician's Global Assessment score of cleared/minimal (PGA=0/1) were randomized 1:4 to Group1 (approved every-12-weeks [q12wk] maintenance) or Group2 (q12-24wk response-based dosing determined by time-to-loss-of-PGA=0/1)...
June 10, 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/28548043/epitaxial-graphene-growth-on-fib-patterned-3c-sic-nanostructures-on-si-111-reducing-milling-damage
#17
Mojtaba Amjadipour, Jennifer MacLeod, Josh Lipton-Duffin, Francesca Iacopi, Nunzio Motta
Epitaxial growth of graphene on SiC is a scalable procedure that does not require any further transfer step, making this an ideal platform for graphene nanostructure fabrication. Focused ion beam (FIB) is a very promising tool for exploring the reduction of the lateral dimension of graphene on SiC to the nanometre scale. However, exposure of graphene to the Ga(+) beam causes significant surface damage through amorphisation and contamination, preventing epitaxial graphene growth. In this paper we demonstrate that combining a protective silicon layer with FIB patterning implemented prior to graphene growth can significantly reduce the damage associated with FIB milling...
May 26, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28537254/large-scale-meta-analysis-characterizes-genetic-architecture-for-common-psoriasis-associated-variants
#18
Lam C Tsoi, Philip E Stuart, Chao Tian, Johann E Gudjonsson, Sayantan Das, Matthew Zawistowski, Eva Ellinghaus, Jonathan N Barker, Vinod Chandran, Nick Dand, Kristina Callis Duffin, Charlotta Enerbäck, Tõnu Esko, Andre Franke, Dafna D Gladman, Per Hoffmann, Külli Kingo, Sulev Kõks, Gerald G Krueger, Henry W Lim, Andres Metspalu, Ulrich Mrowietz, Sören Mucha, Proton Rahman, Andre Reis, Trilokraj Tejasvi, Richard Trembath, John J Voorhees, Stephan Weidinger, Michael Weichenthal, Xiaoquan Wen, Nicholas Eriksson, Hyun M Kang, David A Hinds, Rajan P Nair, Gonçalo R Abecasis, James T Elder
Psoriasis is a complex disease of skin with a prevalence of about 2%. We conducted the largest meta-analysis of genome-wide association studies (GWAS) for psoriasis to date, including data from eight different Caucasian cohorts, with a combined effective sample size >39,000 individuals. We identified 16 additional psoriasis susceptibility loci achieving genome-wide significance, increasing the number of identified loci to 63 for European-origin individuals. Functional analysis highlighted the roles of interferon signalling and the NFκB cascade, and we showed that the psoriasis signals are enriched in regulatory elements from different T cells (CD8(+) T-cells and CD4(+) T-cells including TH0, TH1 and TH17)...
May 24, 2017: Nature Communications
https://www.readbyqxmd.com/read/28494660/young-people-s-changing-demands-for-emergency-services
#19
Christian Duffin
A ten-year study has highlighted some eye-opening statistics concerning children and emergency care: significantly more children are now being admitted for jaundice, acute bronchitis, acute and chronic tonsillitis, and viral infections.
May 12, 2017: Emergency Nurse: the Journal of the RCN Accident and Emergency Nursing Association
https://www.readbyqxmd.com/read/28461534/grappa-2016-project-report
#20
Philip S Helliwell, Oliver FitzGerald, Laura C Coates, Kristina Callis Duffin, Philip J Mease
At the 2016 annual meeting of the Group for Research and Assessment of Psoriasis and Psoriatic Arthritis (GRAPPA), members received updates on several ongoing research and educational efforts. Among them were updates on the FLARE instrument, the Biomarker Project, GRAPPA's logo and Website, continuing progress on the video training project, and numerous educational project efforts in 2016.
May 2017: Journal of Rheumatology
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