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James andrews

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https://www.readbyqxmd.com/read/28230365/catalytic-enantioselective-2-3-rearrangements-of-allylic-ammonium-ylides-a-mechanistic-and-computational-study
#1
Thomas H West, Daniel M Walden, James E Taylor, Alexander C Brueckner, Ryne C Johnston, Paul H-Y Cheong, Guy C Lloyd-Jones, Andrew D Smith
A mechanistic study of the isothiourea-catalysed enantioselective [2,3]-rearrangement of allylic ammonium ylides is described. Reaction kinetic analyses using 19F NMR and density functional theory computations have elucidated a reaction profile and allowed identification of the catalyst resting state and turnover-rate limiting step. A catalytically-rele- vant catalyst-substrate adduct has been observed, and its constitution elucidated unambiguously by 13C and 15N isotopic labelling. Isotopic entrainment has shown the observed catalyst-substrate adduct to be a genuine intermediate on the pro- ductive cycle towards catalysis...
February 23, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28230051/cellular-senescence-mediates-fibrotic-pulmonary-disease
#2
Marissa J Schafer, Thomas A White, Koji Iijima, Andrew J Haak, Giovanni Ligresti, Elizabeth J Atkinson, Ann L Oberg, Jodie Birch, Hanna Salmonowicz, Yi Zhu, Daniel L Mazula, Robert W Brooks, Heike Fuhrmann-Stroissnigg, Tamar Pirtskhalava, Y S Prakash, Tamara Tchkonia, Paul D Robbins, Marie Christine Aubry, João F Passos, James L Kirkland, Daniel J Tschumperlin, Hirohito Kita, Nathan K LeBrasseur
Idiopathic pulmonary fibrosis (IPF) is a fatal disease characterized by interstitial remodelling, leading to compromised lung function. Cellular senescence markers are detectable within IPF lung tissue and senescent cell deletion rejuvenates pulmonary health in aged mice. Whether and how senescent cells regulate IPF or if their removal may be an efficacious intervention strategy is unknown. Here we demonstrate elevated abundance of senescence biomarkers in IPF lung, with p16 expression increasing with disease severity...
February 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28228488/uk-guideline-on-transition-of-adolescent-and-young-persons-with-chronic-digestive-diseases-from-paediatric-to-adult-care
#3
Alenka J Brooks, Philip J Smith, Richard Cohen, Paul Collins, Andrew Douds, Valda Forbes, Daniel R Gaya, Brian T Johnston, Patrick J McKiernan, Charles D Murray, Shaji Sebastian, Monica Smith, Lisa Whitley, Lesley Williams, Richard K Russell, Sara A McCartney, James O Lindsay
The risks of poor transition include delayed and inappropriate transfer that can result in disengagement with healthcare. Structured transition care can improve control of chronic digestive diseases and long-term health-related outcomes. These are the first nationally developed guidelines on the transition of adolescent and young persons (AYP) with chronic digestive diseases from paediatric to adult care. They were commissioned by the Clinical Services and Standards Committee of the British Society of Gastroenterology under the auspices of the Adolescent and Young Persons (A&YP) Section...
February 21, 2017: Gut
https://www.readbyqxmd.com/read/28227838/alleviating-freezing-of-gait-using-phase-dependent-tactile-biofeedback
#4
Will Harrington, Andrew Greenberg, Edward King, James McNames, Lars Holmstrom, Fay B Horak, Martina Mancini, Will Harrington, Andrew Greenberg, Edward King, James McNames, Lars Holmstrom, Fay B Horak, Martina Mancini, Edward King, Lars Holmstrom, Martina Mancini, James McNames, Fay B Horak, Will Harrington, Andrew Greenberg
In this feasibility study, we present a novel, wearable prototype of tactile biofeedback to alleviate gait disturbances, such as freezing of gait in Parkinson's disease. We designed and tested a phase-dependent tactile biofeedback system that can be easily worn on the feet, with a simple switch to turn it on or off. Preliminary validation was performed in 8 subjects with Parkinson's disease who show freezing during a turning in place test. A metronome, control condition was used to compare effectiveness in alleviating freezing...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227743/mri-measures-of-fat-infiltration-in-the-lower-extremities-following-motor-incomplete-spinal-cord-injury-reliability-and-potential-implications-for-muscle-activation
#5
Andrew C Smith, Maria Knikou, Katrina L Yelick, Abigail R Alexander, Margaret M Murnane, Andrew A Kritselis, Paul J Houmpavlis, Jacob G McPherson, Marie Wasielewski, Mark A Hoggarth, James M Elliott, Andrew C Smith, Maria Knikou, Katrina L Yelick, Abigail R Alexander, Margaret M Murnane, Andrew A Kritselis, Paul J Houmpavlis, Jacob G McPherson, Marie Wasielewski, Mark A Hoggarth, James M Elliott, Margaret M Murnane, Paul J Houmpavlis, Katrina L Yelick, Mark A Hoggarth, Marie Wasielewski, James M Elliott, Maria Knikou, Jacob G McPherson, Abigail R Alexander, Andrew A Kritselis, Andrew C Smith
Muscle fat infiltration (MFI) is an expected consequence of incomplete spinal cord injury (iSCI). The MFI magnitude may have clinical value in determining functional recovery. However, there is a lack of understanding of how MFI relates to the volitional muscle activity in people with motor incomplete spinal cord injury (iSCI). Five iSCI and 5 uninjured age-matched control subjects participated in the study. In this preliminary study, we established the reliability of MFI quantification of select lower extremity muscles across different raters...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226899/nanoporous-membrane-robustness-stability-in-small-form-factor-microfluidic-filtration-system
#6
Dean G Johnson, Sabrina Pan, Andrew Hayden, James L McGrath, Dean G Johnson, Sabrina Pan, Andrew Hayden, James L McGrath, Andrew Hayden, Sabrina Pan, Dean G Johnson, James L McGrath
The development of wearable hemodialysis (HD) devices that replace center-based HD holds the promise to improve both outcomes and quality-of-life for patients with end-stage-renal disease (ERD). A prerequisite for these devices is the development of highly efficient membranes that can achieve high toxin clearance in small footprints. The ultrathin nanoporous membrane material developed by our group is orders of magnitude more permeable than conventional HD membranes. We report on our progress making a prototype wearable dialysis unit...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226723/improving-assessment-of-congenital-heart-disease-through-rapid-patient-specific-modeling
#7
Kathleen Gilbert, Genevieve Farrar, Brett Cowan, Avan Suinesiaputra, Christopher Occleshaw, Beau Pontre, James Perry, Sanjeet Hegde, Jeffrey Omens, Andrew McCulloch, Alistair Young, Kathleen Gilbert, Genevieve Farrar, Brett Cowan, Avan Suinesiaputra, Christopher Occleshaw, Beau Pontre, James Perry, Sanjeet Hegde, Jeffrey Omens, Andrew McCulloch, Alistair Young, James Perry, Genevieve Farrar, Avan Suinesiaputra, Brett Cowan, Kathleen Gilbert, Jeffrey Omens, Christopher Occleshaw, Sanjeet Hegde, Beau Pontre, Andrew McCulloch, Alistair Young
Congenital heart disease is the most common birth defect, with an incidence of 75 in every 1000 births. As a result of improved interventions, 90% of people with congenital heart disease now survive to adulthood. They must undergo regular imaging to assess their biventricular (left and right ventricular) function. Analysis of the images is problematic due to the large variety of shapes and complex geometry. In this paper we extend a biventricular modeling method to improve the analysis of MR images from congenital heart disease patients...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226558/a-device-for-controlled-jet-injection-of-large-volumes-of-liquid
#8
James W Mckeage, Bryan P Ruddy, Poul M F Nielsen, Andrew J Taberner, James W Mckeage, Bryan P Ruddy, Poul M F Nielsen, Andrew J Taberner, Bryan P Ruddy, Andrew J Taberner, James W Mckeage, Poul M F Nielsen
We present a needle-free jet injection device controllably actuated by a voice coil and capable of injecting up to 1.3 mL. This device is used to perform jet injections of ~900 μL into porcine tissue. This is the first time that delivery of such a large volume has been reported using an electronically controllable device. The controllability of this device is demonstrated with a series of ejections where the desired volume is ejected to within 1 % during an injection at a predetermined jet velocity.
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28224679/the-repeatability-of-tests-of-eustachian-tube-function-in-healthy-ears
#9
Matthew E Smith, Charlie C Zou, Charlotte Baker, Andrew J C Blythe, Peter J A Hutchinson, James R Tysome
OBJECTIVES/HYPOTHESIS: Many objective tests of eustachian tube (ET) function have been devised for clinical and research use but they have not been directly compared or characterized. As a first step to identifying tests to incorporate into an outcome set for ET dysfunction, we assessed repeatability of a panel of eight of these tests in healthy ears. STUDY DESIGN: Comparison of eight tests of ET function. METHODS: The following tests were investigated in combination with Valsalva, Toynbee, swallow, or sniff maneuvers: 1) patient-reported ET opening, 2) observed tympanic membrane movement, 3) continuous impedance, 4) canal manometry, 5) sonotubometry, 6) nine-step test, 7) tubomanometry, and 8) tympanometry at rest...
February 22, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28223498/attenuated-pfspz-vaccine-induces-strain-transcending-t-cells-and-durable-protection-against-heterologous-controlled-human-malaria-infection
#10
Kirsten E Lyke, Andrew S Ishizuka, Andrea A Berry, Sumana Chakravarty, Adam DeZure, Mary E Enama, Eric R James, Peter F Billingsley, Anusha Gunasekera, Anita Manoj, Minglin Li, Adam J Ruben, Tao Li, Abraham G Eappen, Richard E Stafford, Natasha Kc, Tooba Murshedkar, Floreliz H Mendoza, Ingelise J Gordon, Kathryn L Zephir, LaSonji A Holman, Sarah H Plummer, Cynthia S Hendel, Laura Novik, Pamela J M Costner, Jamie G Saunders, Nina M Berkowitz, Barbara J Flynn, Martha C Nason, Lindsay S Garver, Matthew B Laurens, Christopher V Plowe, Thomas L Richie, Barney S Graham, Mario Roederer, B Kim Lee Sim, Julie E Ledgerwood, Stephen L Hoffman, Robert A Seder
A live-attenuated malaria vaccine, Plasmodium falciparum sporozoite vaccine (PfSPZ Vaccine), confers sterile protection against controlled human malaria infection (CHMI) with Plasmodium falciparum (Pf) parasites homologous to the vaccine strain up to 14 mo after final vaccination. No injectable malaria vaccine has demonstrated long-term protection against CHMI using Pf parasites heterologous to the vaccine strain. Here, we conducted an open-label trial with PfSPZ Vaccine at a dose of 9.0 × 10(5) PfSPZ administered i...
February 21, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28220931/the-role-of-extracorporeal-photopheresis-in-the-management-of-cutaneous-t-cell-lymphoma-graft-versus-host-disease-and-organ-transplant-rejection-a-consensus-statement-update-from-the-uk-photopheresis-society
#11
Arun Alfred, Peter C Taylor, Fiona Dignan, Khaled El-Ghariani, James Griffin, Andrew R Gennery, Denise Bonney, Emma Das-Gupta, Sarah Lawson, Ram K Malladi, Kenneth W Douglas, Tracey Maher, Julie Guest, Laura Hartlett, Andrew J Fisher, Fiona Child, Julia J Scarisbrick
Extracorporeal photopheresis (ECP) has been used for over 35 years in the treatment of erythrodermic cutaneous T-cell lymphoma (CTCL) and over 20 years for chronic and acute graft-versus-host disease (GvHD) and solid organ transplant rejection. ECP for CTCL and GvHD is available at specialised centres across the UK. The lack of prospective randomised trials in ECP led to the development of UK Consensus Statements for patient selection, treatment schedules, monitoring protocols and patient assessment criteria for ECP...
February 21, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/28220839/pten-status-is-a-crucial-determinant-of-the-functional-outcome-of-combined-mek-and-mtor-inhibition-in-cancer
#12
Michele Milella, Italia Falcone, Fabiana Conciatori, Silvia Matteoni, Andrea Sacconi, Teresa De Luca, Chiara Bazzichetto, Vincenzo Corbo, Michele Simbolo, Isabella Sperduti, Antonina Benfante, Anais Del Curatolo, Ursula Cesta Incani, Federico Malusa, Adriana Eramo, Giovanni Sette, Aldo Scarpa, Marina Konopleva, Michael Andreeff, James Andrew McCubrey, Giovanni Blandino, Matilde Todaro, Giorgio Stassi, Ruggero De Maria, Francesco Cognetti, Donatella Del Bufalo, Ludovica Ciuffreda
Combined MAPK/PI3K pathway inhibition represents an attractive, albeit toxic, therapeutic strategy in oncology. Since PTEN lies at the intersection of these two pathways, we investigated whether PTEN status determines the functional response to combined pathway inhibition. PTEN (gene, mRNA, and protein) status was extensively characterized in a panel of cancer cell lines and combined MEK/mTOR inhibition displayed highly synergistic pharmacologic interactions almost exclusively in PTEN-loss models. Genetic manipulation of PTEN status confirmed a mechanistic role for PTEN in determining the functional outcome of combined pathway blockade...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28220780/bacterial-infections-change-natural-history-of-cirrhosis-irrespective-of-liver-disease-severity
#13
Elena Dionigi, Matteo Garcovich, Mauro Borzio, Gioacchino Leandro, Avik Majumdar, Aikaterini Tsami, Vasiliki Arvaniti, Davide Roccarina, Massimo Pinzani, Andrew K Burroughs, James O'Beirne, Emmanuel A Tsochatzis
OBJECTIVES: We assessed the prognostic significance of infections in relation to current prognostic scores and explored if infection could be considered per se a distinct clinical stage in the natural history of cirrhosis. METHODS: We included consecutive patients with cirrhosis admitted to a tertiary referral liver unit for at least 48 h over a 2-year period. Diagnosis of infection was based on positive cultures or strict established criteria. We used competing risk analysis and propensity score matching for data analysis...
February 21, 2017: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/28220023/early-palliative-care-reduces-end-of-life-intensive-care-unit-icu-use-but-not-icu-course-in-patients-with-advanced-cancer
#14
Andrew M Romano, Kristine E Gade, Gradon Nielsen, Robert Havard, James H Harrison, Josh Barclay, George J Stukenborg, Paul W Read, Leslie J Blackhall, Patrick M Dillon
BACKGROUND: Early palliative care for advanced cancer patients improves quality of life and survival, but less is known about its effect on intensive care unit (ICU) use at the end of life. This analysis assessed the effect of a comprehensive early palliative care program on ICU use and other outcomes among patients with advanced cancer. PATIENTS AND METHODS: A retrospective cohort of patients with advanced cancer enrolled in an early palliative care program (n = 275) was compared with a concurrent control group of patients receiving standard care (n = 195) during the same time period by using multivariable logistic regression analysis...
February 20, 2017: Oncologist
https://www.readbyqxmd.com/read/28215131/angiotensin-ii-for-the-treatment-of-high-output-shock-3-athos-3-protocol-for-a-phase-iii-double-blind-randomised-controlled-trial
#15
Lakhmir S Chawla, James A Russell, Sean M Bagshaw, Andrew D Shaw, Stuart L Goldstein, Mitchell P Fink, George F Tidmarsh
OBJECTIVE: Catecholamine-resistant hypotension (CRH) is characterised by inadequate response to standard doses of vasopressors, and increased mortality. Our Angiotensin II for the Treatment of High-Output Shock 3 (ATHOS-3) trial compares the efficacy and safety of angiotensin II (ANGII) versus placebo in CRH. DESIGN, SETTING AND PARTICIPANTS: A phase III, multicentre, randomised, placebo-controlled trial of LJPC-501 (synthetic ANGII) for CRH in up to 120 intensive care units...
March 2017: Critical Care and Resuscitation: Journal of the Australasian Academy of Critical Care Medicine
https://www.readbyqxmd.com/read/28211263/increased-regurgitant-flow-causes-endocardial-cushion-defects-in-an-avian-embryonic-model-of-congenital-heart-disease
#16
Stephanie M Ford, Matthew T McPheeters, Yves T Wang, Pei Ma, Shi Gu, James Strainic, Christopher Snyder, Andrew M Rollins, Michiko Watanabe, Michael W Jenkins
BACKGROUND: The relationship between changes in endocardial cushion and resultant congenital heart diseases (CHD) has yet to be established. It has been shown that increased regurgitant flow early in embryonic heart development leads to endocardial cushion defects, but it remains unclear how abnormal endocardial cushions during the looping stages might affect the fully septated heart. The goal of this study was to reproducibly alter blood flow in vivo and then quantify the resultant effects on morphology of endocardial cushions in the looping heart and on CHDs in the septated heart...
February 17, 2017: Congenital Heart Disease
https://www.readbyqxmd.com/read/28210202/mechanisms-and-effects-of-transcranial-direct-current-stimulation
#17
James Giordano, Marom Bikson, Emily S Kappenman, Vincent P Clark, H Branch Coslett, Michael R Hamblin, Roy Hamilton, Ryan Jankord, Walter J Kozumbo, R Andrew McKinley, Michael A Nitsche, J Patrick Reilly, Jessica Richardson, Rachel Wurzman, Edward Calabrese
The US Air Force Office of Scientific Research convened a meeting of researchers in the fields of neuroscience, psychology, engineering, and medicine to discuss most pressing issues facing ongoing research in the field of transcranial direct current stimulation (tDCS) and related techniques. In this study, we present opinions prepared by participants of the meeting, focusing on the most promising areas of research, immediate and future goals for the field, and the potential for hormesis theory to inform tDCS research...
January 2017: Dose-response: a Publication of International Hormesis Society
https://www.readbyqxmd.com/read/28210094/endoscopic-ultrasound-sedation-in-the-united-kingdom-is-life-without-propofol-tolerable
#18
Jennifer Anne Campbell, Andrew James Irvine, Andrew Derek Hopper
There is compelling evidence to support the quality, cost effectiveness and safety profile of non-anesthesiologist-administered propofol for endoscopic ultrasound (EUS). However in the United Kingdom, it is recommended that the administration and monitoring of propofol sedation for endoscopic procedures should be the responsibility of a dedicated and appropriately trained anaesthetist only. The majority of United Kingdom EUS procedures are performed with opiate and benzodiazepine sedation rather than anaesthetist led propofol lists due to anaesthetist resource availability...
January 21, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28208175/independent-validation-of-effect-of-hsd3b1-genotype-on-response-to-androgen-deprivation-therapy-in-prostate-cancer
#19
Neeraj Agarwal, Andrew W Hahn, David M Gill, James M Farnham, Austin I Poole, Lisa Cannon-Albright
No abstract text is available yet for this article.
February 16, 2017: JAMA Oncology
https://www.readbyqxmd.com/read/28208157/specific-mutations-in-kras-codon-12-are-associated-with-worse-overall-survival-in-patients-with-advanced-and-recurrent-colorectal-cancer
#20
Robert P Jones, Paul A Sutton, Jonathan P Evans, Rachel Clifford, Andrew McAvoy, James Lewis, Abigail Rousseau, Roger Mountford, Derek McWhirter, Hassan Z Malik
BACKGROUND: Activating mutations in KRAS have been suggested as potential predictive and prognostic biomarkers. However, the prognostic impact of specific point mutations remains less clear. This study assessed the prognostic impact of specific KRAS mutations on survival for patients with colorectal cancer. METHODS: Retrospective review of patients KRAS typed for advanced and recurrent colorectal cancer between 2010 and 2015 in a UK Cancer Network. RESULTS: We evaluated the impact of KRAS genotype in 392 patients...
February 16, 2017: British Journal of Cancer
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