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Chris Doe

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https://www.readbyqxmd.com/read/29158446/drosophila-embryonic-type-ii-neuroblasts-origin-temporal-patterning-and-contribution-to-the-adult-central-complex
#1
Kathleen T Walsh, Chris Q Doe
Drosophila neuroblasts are an excellent model for investigating how neuronal diversity is generated. Most brain neuroblasts generate a series of ganglion mother cells (GMCs) that each make two neurons (type I lineage), but sixteen brain neuroblasts generate a series of intermediate neural progenitors (INPs) that each produce 4-6 GMCs and 8-12 neurons (type II lineage). Thus, type II lineages are similar to primate cortical lineages, and may serve as models for understanding cortical expansion. Yet the origin of type II neuroblasts remains mysterious: do they form in the embryo or larva? If they form in the embryo, do their progeny populate the adult central complex, as do the larval type II neuroblast progeny? Here we present molecular and clonal data showing that all type II neuroblasts form in the embryo, produce INPs, and express known temporal transcription factors...
November 20, 2017: Development
https://www.readbyqxmd.com/read/29142019/molecular-imaging-of-glut1-and-glut5-in-breast-cancer-a-multitracer-pet-imaging-study-in-mice
#2
Melinda Wuest, Ingrit Hamann, Vincent Bouvet, Darryl Glubrecht, Alison Marshall, Brendan Trayner, Olivier Soueidan, Daniel Krys, Michael Wagner, Chris Cheeseman, Frederick West, Frank Wuest
Use of [18F]FDG-PET in clinical breast cancer (BC) imaging is limited mainly due to insufficient expression levels of GLUT1 in up to 50% of all patients. Fructose-specific facilitative hexose transporter GLUT5 represents an alternative biomarker for PET imaging of hexose metabolism in BC. The goal of the present study was to compare uptake characteristics of selected hexose-based PET radiotracers in murine BC model EMT6. Uptake of 1-deoxy-1-[18F]fluoro-D-fructose (1-[18F]FDF), 6-deoxy-6-[18F]fluoro-D-fructose (6-[18F]FDF), 1-deoxy-1-[18F]fluoro-2,5-anhydro-mannitol (1-[18F]FDAM), 2-deoxy-2-[18F]fluoro-D-glucose (2-[18F]FDG) and 6-deoxy-6-[18F]fluoro-D-glucose (6-[18F]FDG) was studied in EMT6 cells, tumors and muscle and correlated to GLUT1 and GLUT5 expression levels...
November 15, 2017: Molecular Pharmacology
https://www.readbyqxmd.com/read/29140134/a-nutrition-recovery-station-following-recreational-exercise-improves-fruit-consumption-but-does-not-influence-fluid-recovery
#3
Ben Desbrow, Katelyn Barnes, Caroline Young, Gregory R Cox, Chris Irwin
Immediate post-exercise access to fruit/fluid via a recovery "station" is a common feature of mass participation sporting events. Yet little evidence exists examining their impact on subsequent dietary intake. The aim of this study was to determine if access to fruit/water/sports drinks within a recovery station significantly alters dietary and fluid intakes in the immediate post-exercise period and influences hydration status the next morning. 127 (79 males) healthy participants (mean±SD, age=22.5±3.5y, body mass (BM)=73±13kg) completed two self-paced morning 10km runs separated by 1 week...
November 15, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29134577/perspective-taking-and-theory-of-mind-in-hide-and-seek
#4
Chris N H Street, Walter F Bischof, Alan Kingstone
Does theory of mind play a significant role in where people choose to hide an item or where they search for an item that has been hidden? Adapting Anderson's "Hide-Find Paradigm" Anderson et al. (Action, Perception and Performance, 76, 907-913, 2014) participants viewed homogenous or popout visual arrays on a touchscreen table. Their task was to indicate where in the array they would hide an item, or to search for an item that had been hidden, by either a friend or a foe. Critically, participants believed that their sitting location at the touchtable was the same as-or opposite to-their partner's location...
November 13, 2017: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/29122547/low-dose-aspirin-use-does-not-increase-survival-in-2-independent-population-based-cohorts-of-patients-with-esophageal-or-gastric-cancer
#5
Andrew D Spence, John Busby, Brian T Johnston, John A Baron, Carmel M Hughes, Helen G Coleman, Chris R Cardwell
BACKGROUND & AIMS: Pre-clinical studies have shown aspirin to have anti-cancer properties and epidemiologic studies have associated aspirin use with longer survival times of patients with cancer. We studied 2 large cohorts to determine the association between aspirin use and cancer-specific mortality in patients with esophageal or gastric cancer. METHODS: We performed a population-based study using cohorts of patients newly diagnosed with esophageal or gastric cancer, identified from cancer registries in England from 1998 through 2012 and the Scottish Cancer Registry from 2009 through 2012...
November 6, 2017: Gastroenterology
https://www.readbyqxmd.com/read/29109969/mapping-language-networks-using-the-structural-and-dynamic-brain-connectomes
#6
John Del Gaizo, Julius Fridriksson, Grigori Yourganov, Argye E Hillis, Gregory Hickok, Bratislav Misic, Chris Rorden, Leonardo Bonilha
Lesion-symptom mapping is often employed to define brain structures that are crucial for human behavior. Even though poststroke deficits result from gray matter damage as well as secondary white matter loss, the impact of structural disconnection is overlooked by conventional lesion-symptom mapping because it does not measure loss of connectivity beyond the stroke lesion. This study describes how traditional lesion mapping can be combined with structural connectome lesion symptom mapping (CLSM) and connectome dynamics lesion symptom mapping (CDLSM) to relate residual white matter networks to behavior...
September 2017: ENeuro
https://www.readbyqxmd.com/read/29090616/mouse-podoplanin-supports-adhesion-and-aggregation-of-platelets-under-arterial-shear-a-novel-mechanism-of-haemostasis
#7
Stephanie E Lombard, Alice Y Pollitt, Craig E Hughes, Ying Di, Tom Mckinnon, Chris A O'callaghan, Steve P Watson
The podoplanin-CLEC-2 axis is critical in mice for prevention of hemorrhage in the cerebral vasculature during mid-gestation. This raises the question as to how platelets are captured by podoplanin on neuroepithelial cells in a high shear environment. In this study, we demonstrate that mouse platelets form stable aggregates on mouse podoplanin at arterial shear through a CLEC-2 and Src kinase-dependent pathway. Adhesion and aggregation are also dependent on the platelet glycoprotein (GP) receptors, integrin αIIbβ3 and GPIb, and the feedback agonists ADP and thromboxane A2 (TxA2)...
November 1, 2017: Platelets
https://www.readbyqxmd.com/read/29083042/practitioner-review-current-best-practice-in-the-use-of-parent-training-and-other-behavioural-interventions-in-the-treatment-of-children-and-adolescents-with-attention-deficit-hyperactivity-disorder
#8
REVIEW
David Daley, Saskia Van Der Oord, Maite Ferrin, Samuele Cortese, Marina Danckaerts, Manfred Doepfner, Barbara J Van den Hoofdakker, David Coghill, Margaret Thompson, Philip Asherson, Tobias Banaschewski, Daniel Brandeis, Jan Buitelaar, Ralf W Dittmann, Chris Hollis, Martin Holtmann, Eric Konofal, Michel Lecendreux, Aribert Rothenberger, Paramala Santosh, Emily Simonoff, Cesar Soutullo, Hans Christoph Steinhausen, Argyris Stringaris, Eric Taylor, Ian C K Wong, Alessandro Zuddas, Edmund J Sonuga-Barke
BACKGROUND: Behavioural interventions are recommended for use with children and young people with attention deficit hyperactivity disorder (ADHD); however, specific guidance for their implementation based on the best available evidence is currently lacking. METHODS: This review used an explicit question and answer format to address issues of clinical concern, based on expert interpretation of the evidence with precedence given to meta-analyses of randomised controlled trials...
October 30, 2017: Journal of Child Psychology and Psychiatry, and Allied Disciplines
https://www.readbyqxmd.com/read/29082015/does-foreign-aid-crowd-out-government-investments-evidence-from-rural-health-centres-in-rwanda
#9
Chunling Lu, Benjamin Cook, Chris Desmond
BACKGROUND: Rural healthcare facilities in low-income countries play a major role in providing primary care to rural populations. We examined the link of foreign aid with government investments and medical service provision in rural health centres in Rwanda. METHODS: Using the District Health System Strengthening Tool, a web-based database built by the Ministry of Health in Rwanda, we constructed two composite indices representing provision of (1) child and maternal care and (2) HIV, tuberculosis (TB) and malaria services in 330 rural health centres between 2009 and 2011...
2017: BMJ Global Health
https://www.readbyqxmd.com/read/29065373/the-mutual-restraint-effect-between-the-expansion-of-alternanthera-philoxeroides-mart-griseb-and-cadmium-mobility-in-aquatic-environment
#10
Jian Li, Zhiwei Du, Chris B Zou, Zhicong Dai, Daolin Du, Chongling Yan
Alternanthera philoxeroides (Mart.) Griseb is one of the most malignant weeds in its invision habitats. While in the cadmium-contaminated aquatic environment, does A. philoxeroides possess good tolerance and adaptability? To demonstrate the effects of cadmium on A. philoxeroides in the polluted water bodies, a hydroponic stress experiment was conducted over a gradient of Cd concentrations (0, 2.5 and 5mg/l) in triplicate. The seedlings were cultured in a greenhouse and harvested on days 0, 10, 20, 30 and 40, respectively...
October 21, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29065348/subacromial-impingement-syndrome-what-does-this-mean-to-and-for-the-patient-a-qualitative-study
#11
Andrew Cuff, Chris Littlewood
BACKGROUND: Structured exercise has been reported as the current treatment of choice for patients diagnosed with subacromial impingement syndrome (SIS). However, it has been suggested that this diagnostic term and the language used to explain this condition might negatively influence patient expectations and serve as a barrier to engagement with exercise, hence compromising clinical outcomes. AIM: To explore how patients rationalise their shoulder pain following a diagnosis of SIS and how this understanding might impact on their perception of physiotherapy and engagement with exercise...
October 17, 2017: Musculoskeletal Science & Practice
https://www.readbyqxmd.com/read/29060496/freezing-of-gait-detection-using-temporal-spatial-and-physiological-features-with-a-support-vector-machine-classifier
#12
Parisa Tahafchi, Rene Molina, Jaimie A Roper, Kristen Sowalsky, Chris J Hass, Aysegul Gunduz, Michael S Okun, Jack W Judy
Freezing-of-Gait (FoG) is a syndrome of Parkinson's disease defined by episodes when patients show a complete inability to take a step or continue with their locomotion. In order to develop closed-loop therapeutic strategies, including deep brain stimulation, a reliable means of detecting freezing episodes is required. By using wearable accelerometers, freezing episodes can be detected with energy-based algorithms when the ratio of the energy in the freeze band (3 to 8 Hz) to that of the locomotion band (0...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29059478/does-water-temperature-influence-the-performance-of-key-survival-skills
#13
Christophe Schnitzler, Chris Button, Ludovic Seifert, Geoffrey Armbrust, James L Croft
PURPOSE: Aquatic survival skills may be compromised in cold water thereby increasing the likelihood of drowning. This study compared physiological, psychological, and behavioural responses of humans treading water and swimming in cold and temperate water. METHODS: Thirty-eight participants were classified as inexperienced (n=9), recreational (n=15), or skilled (n=10) swimmers. They performed three tasks: treading water (120 s), swim at "comfortable" pace, and swim at "fast" pace in two water conditions (28 °C vs 10 °C)...
October 23, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29054881/ablation-of-tfr1-in-purkinje-cells-inhibits-mglu1-trafficking-and-impairs-motor-coordination-but-not-autistic-like-behaviors
#14
Jia-Huan Zhou, Xin-Tai Wang, Liang Zhou, Lin Zhou, Fang-Xiao Xu, Li-Da Su, Hao Wang, Fan Jia, Fu-Qiang Xu, Gui-Quan Chen, Chris De Zeeuw, Ying Shen
Group 1 metabotropic glutamate receptors (mGlu1/5) are critical to synapse formation and participate in synaptic long-term potentiation (LTP) and long-term depression (LTD) in the brain. mGlu1/5 signaling alterations have been documented in cognitive impairment, neurodegenerative disorders, and psychiatric diseases, but underlying mechanisms for its modulation are not clear. Here, we report that transferrin receptor 1 (TFR1), a trans-membrane protein of clathrin complex, modulates the trafficking of mGlu1 in cerebellar Purkinje cells (PCs) from male mice...
October 20, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29025828/diurnal-cortisol-and-mental-well-being-in-middle-and-older-age-evidence-from-four-cohort-studies
#15
Mai Stafford, Yoav Ben-Shlomo, Cyrus Cooper, Catharine Gale, Michael P Gardner, Marie-Claude Geoffroy, Chris Power, Diana Kuh, Rachel Cooper
OBJECTIVES: We conducted an individual participant meta-analysis to test the hypothesis that cortisol patterns indicative of dysregulated hypothalamic-pituitary-adrenal axis functioning would be prospectively associated with poorer well-being at follow-up. SETTING: Four large UK-based cohort studies. PARTICIPANTS: Those providing valid salivary or serum cortisol samples (n=7515 for morning cortisol; n=1612 for cortisol awakening response) at baseline (age 44-82) and well-being data on the Warwick Edinburgh Mental Wellbeing Scale at follow-up (0-8 years) were included...
October 12, 2017: BMJ Open
https://www.readbyqxmd.com/read/29023763/cps49-induced-neurotoxicity-does-not-cause-limb-patterning-anomalies-in-developing-chicken-embryos
#16
Chris Mahony, Scott McMenemy, Alexandra J Rafipay, Shaunna-Leigh Beedie, Lucas Rosa Fraga, Michael Gütschow, William D Figg, Lynda Erskine, Neil Vargesson
Thalidomide notoriously caused severe birth defects, particularly to the limbs, in those exposed in utero following maternal use of the drug to treat morning sickness. How the drug caused these birth defects remains unclear. Many theories have been proposed including actions on the forming blood vessels. However, thalidomide survivors also have altered nerve patterns and the drug is known for its neurotoxic actions in adults following prolonged use. We have previously shown that CPS49, an anti-angiogenic analog of thalidomide, causes a range of limb malformations in a time-sensitive manner in chicken embryos...
October 10, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/29017509/acceptability-of-dietary-and-physical-activity-lifestyle-modification-for-men-following-radiotherapy-or-radical-prostatectomy-for-localised-prostate-cancer-a-qualitative-investigation
#17
Lucy E Hackshaw-McGeagh, Eileen Sutton, Raj Persad, Jonathan Aning, Amit Bahl, Anthony Koupparis, Chris Millett, Richard M Martin, J Athene Lane
BACKGROUND: The experience and acceptability of lifestyle interventions for men with localised prostate cancer are not well understood, yet lifestyle interventions are increasingly promoted for cancer survivors. We explored the opinions, experiences and perceived acceptability of taking part in nutritional and physical activity interventions amongst men with prostate cancer and their partners; with the ultimate plan to use such information to inform the development of nutritional and physical activity interventions for men with prostate cancer...
October 10, 2017: BMC Urology
https://www.readbyqxmd.com/read/28994635/does-isolation-of-enterococcus-affect-outcomes-in-intra-abdominal-infections
#18
James M Sanders, Jeffrey M Tessier, Robert Sawyer, E P Dellinger, Preston R Miller, Nicholas Namias, Michaela West, Charles H Cook, P J O'Neill, Lena Napolitano, Rishi Rattan, Joseph Cuschieri, Jeffrey A Claridge, Chris A Guidry, Reza Askari, Kaysie Banton, Ori Rotstein, Billy J Moore, Therese M Duane
BACKGROUND: Enterococci are isolated frequently as pathogens in patients with intra-abdominal infections (IAIs) and may predict poor clinical outcomes. It remains controversial whether enterococci warrant an altered treatment approach with regard to antimicrobial treatment. PATIENTS AND METHODS: The study population was derived from the Study to Optimize Peritoneal Infection Therapy (STOP-IT) trial database. Through post hoc analysis subjects were stratified into two groups based on isolation of Enterococcus...
October 10, 2017: Surgical Infections
https://www.readbyqxmd.com/read/28992439/temporal-patterning-in-the-drosophila-cns
#19
Chris Q Doe
A small pool of neural progenitors generates the vast diversity of cell types in the CNS. Spatial patterning specifies progenitor identity, followed by temporal patterning within progenitor lineages to expand neural diversity. Recent work has shown that in Drosophila, all neural progenitors (neuroblasts) sequentially express temporal transcription factors (TTFs) that generate molecular and cellular diversity. Embryonic neuroblasts use a lineage-intrinsic cascade of five TTFs that switch nearly every neuroblast cell division; larval optic lobe neuroblasts also use a rapid cascade of five TTFs, but the factors are completely different...
October 6, 2017: Annual Review of Cell and Developmental Biology
https://www.readbyqxmd.com/read/28989317/can-a-quantum-state-over-time-resemble-a-quantum-state-at-a-single-time
#20
Dominic Horsman, Chris Heunen, Matthew F Pusey, Jonathan Barrett, Robert W Spekkens
The standard formalism of quantum theory treats space and time in fundamentally different ways. In particular, a composite system at a given time is represented by a joint state, but the formalism does not prescribe a joint state for a composite of systems at different times. If there were a way of defining such a joint state, this would potentially permit a more even-handed treatment of space and time, and would strengthen the existing analogy between quantum states and classical probability distributions...
September 2017: Proceedings. Mathematical, Physical, and Engineering Sciences
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