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Steve watson

Gail Gilchrist, Davina Swan, April Shaw, Ada Keding, Sarah Towers, Noel Craine, Alison Munro, Elizabeth Hughes, Steve Parrott, John Strang, Avril Taylor, Judith Watson
BACKGROUND: While opiate substitution therapy and injecting equipment provision (IEP) have reduced blood-borne viruses (BBV) among people who inject drugs (PWID), some PWID continue to share injecting equipment and acquire BBV. Psychosocial interventions that address risk behaviours could reduce BBV transmission among PWID. METHODS: A pragmatic, two-armed randomised controlled, open feasibility study of PWID attending drug treatment or IEP in four UK regions. Ninety-nine PWID were randomly allocated to receive a three-session manualised psychosocial group intervention and BBV transmission information booklet plus treatment as usual (TAU) (n = 52) or information booklet plus TAU (n = 47)...
March 21, 2017: Harm Reduction Journal
Annabel Maclachlan, Gerry Dolan, Charlotte Grimley, Steve P Watson, Neil V Morgan, On Behalf Of The Uk Gapp Study Group
Here, we describe a mother and son with a lifelong bleeding tendency and posttraumatic bleeding who were recruited to the UK Genotyping and Phenotyping of Platelets (GAPP) study with a suspected platelet function disorder. However, despite a clinically significant bleeding score, both had normal platelet counts and normal platelet function. The patients' blood was analyzed by light transmission aggregometry and genotyping by whole exome sequencing, as outlined by the GAPP study. Approximately 25 000 genetic variants were found for each patient as a result of sequencing and were filtered using a specialized bioinformatics pipeline...
March 7, 2017: Platelets
Alexander Lee, Anupam Aditi, Yasser M Bhat, Kenneth F Binmoeller, Chris Hamerski, Oriol Sendino, Steve Kane, John P Cello, Lukejohn W Day, Medi Mohamadnejad, V Raman Muthusamy, Rabindra Watson, Jason B Klapman, Sri Komanduri, Sachin Wani, Janak N Shah
Background and aims Precut papillotomy is widely used after failed biliary cannulation. Endoscopic ultrasound (EUS)-guided biliary access techniques are newer methods to facilitate access and therapy in failed cannulation. We evaluated the impact of EUS-guided biliary access on endoscopic retrograde cholangiopancreatography (ERCP) success and compared these techniques to precut papillotomy. Patients and methods We retrospectively compared two ERCP cohorts. One cohort consisted of biliary ERCPs (n = 1053) attempted in patients with native papillae and surgically unaltered anatomy in whom precut papillotomy and/or EUS-guided biliary access were routinely performed immediately after failed cannulation...
February 2017: Endoscopy
Holly Payne, Tatyana Ponomaryov, Steve P Watson, Alexander Brill
Deep vein thrombosis (DVT) with its major complication, pulmonary embolism, is a global health problem. Mechanisms of DVT remain incompletely understood. Platelets play a role in DVT but the impact of specific platelet receptors remains unclear. Platelet C-type lectin-like receptor 2 (CLEC-2) is known to maintain the physiological state of blood vasculature under inflammatory conditions. DVT is a thromboinflammatory disorder developing largely as sterile inflammation in the vessel wall. We hypothesized therefore that CLEC-2 might play a role in DVT...
January 19, 2017: Blood
Paul Harrison, Steve Watson
No abstract text is available yet for this article.
January 2017: Platelets
Elizabeth J Haining, Alexandra L Matthews, Peter J Noy, Hanna M Romanska, Helen J Harris, Jeremy Pike, Martina Morowski, Rebecca L Gavin, Jing Yang, Pierre-Emmanuel Milhiet, Fedor Berditchevski, Bernhard Nieswandt, Natalie S Poulter, Steve P Watson, Michael G Tomlinson
The tetraspanins are a superfamily of four-transmembrane proteins, which regulate the trafficking, lateral diffusion and clustering of the transmembrane proteins with which they interact. We have previously shown that tetraspanin Tspan9 is expressed on platelets. Here we have characterised gene-trap mice lacking Tspan9. The mice were viable with normal platelet numbers and size. Tspan9-deficient platelets were specifically defective in aggregation and secretion induced by the platelet collagen receptor GPVI, despite normal surface GPVI expression levels...
December 29, 2016: Platelets
Roberta Bianchi, Erica Russo, Samia B Bachmann, Steven T Proulx, Marko Sesartic, Nora Smaadahl, Steve P Watson, Christopher D Buckley, Cornelia Halin, Michael Detmar
OBJECTIVE: The lymphatic vascular system exerts major physiological functions in the transport of interstitial fluid from peripheral tissues back to the blood circulation and in the trafficking of immune cells to lymph nodes. Previous studies in global constitutive knockout mice for the lymphatic transmembrane molecule podoplanin reported perinatal lethality and a complex phenotype with lung abnormalities, cardiac defects, lymphedema, blood-filled lymphatic vessels, and lack of lymph node organization, reflecting the importance of podoplanin expression not only by the lymphatic endothelium but also by a variety of nonendothelial cell types...
January 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
Okuma Emile Kasende, Vincent de Paul N Nziko, Steve Scheiner
Temozolomide (TMZ) was paired with each of the five nucleic acid bases, and the potential energy surface searched for all minima, in the context of dispersion-corrected density functional theory and MP2 methods. Three types of arrangements were observed, with competitive stabilities. Coplanar H-bonding structures, reminiscent of Watson-Crick base pairs were typically the lowest in energy, albeit by a small amount. Also very stable were perpendicular arrangements that included one or more H-bonds. The two monomers were stacked approximately parallel to one another in the third category, some of which contained weak and distorted H-bonds...
September 8, 2016: Journal of Physical Chemistry. B
Ben Johnson, Gillian C Lowe, Jane Futterer, Marie Lordkipanidzé, David MacDonald, Michael A Simpson, Isabel Sanchez-Guiú, Sian Drake, Danai Bem, Vincenzo Leo, Sarah J Fletcher, Ban Dawood, José Rivera, David Allsup, Tina Biss, Paula Hb Bolton-Maggs, Peter Collins, Nicola Curry, Charlotte Grimley, Beki James, Mike Makris, Jayashree Motwani, Sue Pavord, Katherine Talks, Jecko Thachil, Jonathan Wilde, Mike Williams, Paul Harrison, Paul Gissen, Stuart Mundell, Andrew Mumford, Martina E Daly, Steve P Watson, Neil V Morgan
Inherited thrombocytopenias are a heterogeneous group of disorders characterized by abnormally low platelet counts which can be associated with abnormal bleeding. Next-generation sequencing has previously been employed in these disorders for the confirmation of suspected genetic abnormalities, and more recently in the discovery of novel disease-causing genes. However its full potential has not yet been exploited. Over the past 6 years we have sequenced the exomes from 55 patients, including 37 index cases and 18 additional family members, all of whom were recruited to the UK Genotyping and Phenotyping of Platelets study...
October 2016: Haematologica
Saba Nayar, Joana Campos, Ming May Chung, Leyre Navarro-Núñez, Menka Chachlani, Nathalie Steinthal, David H Gardner, Philip Rankin, Thomas Cloake, Jorge H Caamaño, Helen M McGettrick, Steve P Watson, Sanjiv Luther, Christopher D Buckley, Francesca Barone
Lymphangiogenesis associated with tertiary lymphoid structure (TLS) has been reported in numerous studies. However, the kinetics and dynamic changes occurring to the lymphatic vascular network during TLS development have not been studied. Using a viral-induced, resolving model of TLS formation in the salivary glands of adult mice we demonstrate that the expansion of the lymphatic vascular network is tightly regulated. Lymphatic vessel expansion occurs in two distinct phases. The first wave of expansion is dependent on IL-7...
September 1, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
Debi Bhattacharya, Clare F Aldus, Garry Barton, Christine M Bond, Sathon Boonyaprapa, Ian S Charles, Robert Fleetcroft, Richard Holland, Christina Jerosch-Herold, Charlotte Salter, Lee Shepstone, Christine Walton, Steve Watson, David J Wright
BACKGROUND: Medication organisation devices (MODs) provide compartments for a patient's medication to be organised into the days of the week and the recommended times the medication should be taken. AIM: To define the optimal trial design for testing the clinical effectiveness and cost-effectiveness of MODs. DESIGN: The feasibility study comprised a systematic review and focus groups to inform a randomised controlled trial (RCT) design. The resulting features were tested on a small scale, using a 2 × 2 factorial design to compare MODs with usual packaging and to compare weekly with monthly supply...
July 2016: Health Technology Assessment: HTA
Annabel Maclachlan, Steve P Watson, Neil V Morgan
Inherited platelet disorders (IPDs) are a heterogeneous group of disorders associated with normal or reduced platelet counts and bleeding diatheses of varying severities. The identification of the underlying cause of IPDs is clinically challenging due to the absence of a gold-standard platelet test, and is often based on a clinical presentation and normal values in other hematology assays. As a consequence, a DNA-based approach has a potentially important role in the investigation of these patients. Next-generation sequencing (NGS) technologies are allowing the rapid analysis of genes that have been previously implicated in IPDs or that are known to have a key role in platelet regulation, as well as novel genes that have not been previously implicated in platelet dysfunction...
January 2017: Platelets
Sarah C Walpole, Clare Shortall, May Ci van Schalkwyk, Abi Merriel, Jayne Ellis, Lucy Obolensky, Marisa Casanova Dias, Jessica Watson, Colin S Brown, Jennifer Hall, Luisa M Pettigrew, Steve Allen
BACKGROUND: Globalisation is having profound impacts on health and healthcare. We solicited the views of a wide range of stakeholders in order to develop core global health competencies for postgraduate doctors. METHODS: Published literature and existing curricula informed writing of seven global health competencies for consultation. A modified policy Delphi involved an online survey and face-to-face and telephone interviews over three rounds. RESULTS: Over 250 stakeholders participated, including doctors, other health professionals, policymakers and members of the public from all continents of the world...
September 2016: International Health
María Luisa Lozano, Aaron Cook, José María Bastida, David S Paul, Gemma Iruin, Ana Rosa Cid, Rosa Adan-Pedroso, José Ramón González-Porras, Jesús María Hernández-Rivas, Sarah J Fletcher, Ben Johnson, Neil Morgan, Francisca Ferrer-Marin, Vicente Vicente, John Sondek, Steve P Watson, Wolfgang Bergmeier, José Rivera
In addition to mutations in ITG2B or ITGB3 genes that cause defective αIIbβ3 expression and/or function in Glanzmann's thrombasthenia patients, platelet dysfunction can be a result of genetic variability in proteins that mediate inside-out activation of αIIbβ3 The RASGRP2 gene is strongly expressed in platelets and neutrophils, where its encoded protein CalDAG-GEFI facilitates the activation of Rap1 and subsequent activation of integrins. We used next-generation sequencing (NGS) and whole-exome sequencing (WES) to identify 2 novel function-disrupting mutations in RASGRP2 that account for bleeding diathesis and platelet dysfunction in 2 unrelated families...
September 1, 2016: Blood
Jerico Revote, Nathan S Watson-Haigh, Steve Quenette, Blair Bethwaite, Annette McGrath, Catherine A Shang
The Bioinformatics Training Platform (BTP) has been developed to provide access to the computational infrastructure required to deliver sophisticated hands-on bioinformatics training courses. The BTP is a cloud-based solution that is in active use for delivering next-generation sequencing training to Australian researchers at geographically dispersed locations. The BTP was built to provide an easy, accessible, consistent and cost-effective approach to delivering workshops at host universities and organizations with a high demand for bioinformatics training but lacking the dedicated bioinformatics training suites required...
April 15, 2016: Briefings in Bioinformatics
John C Beaulieu, Rebecca E Stein-Chisholm, Steven W Lloyd, Karen L Bett-Garber, Casey C Grimm, Michael A Watson, Jeanne M Lea
BACKGROUND: High antioxidant content and keen marketing have increased blueberry demand and increased local production which in turn mandates new uses for abundant harvests. Pilot scale processes were employed to investigate the anthocyanidin profiles, qualitative volatile compositions, and sensorial attributes in not-from-concentrate (NFC) 'Tifblue' rabbiteye blueberry juices. RESULTS: Processing prior to pasteurization generally resulted in increased L(*) and hue angle color, while a(*) , b(*) , and C(*) decreased...
January 2017: Journal of the Science of Food and Agriculture
Srimoyee Ghosh, Alexander Taylor, Melissa Chin, Hon-Ren Huang, Andrew R Conery, Jennifer A Mertz, Andres Salmeron, Pranal J Dakle, Deanna Mele, Alexandre Cote, Hari Jayaram, Jeremy W Setser, Florence Poy, Georgia Hatzivassiliou, Denise DeAlmeida-Nagata, Peter Sandy, Charlie Hatton, F Anthony Romero, Eugene Chiang, Thornik Reimer, Terry Crawford, Eneida Pardo, Venita G Watson, Vickie Tsui, Andrea G Cochran, Laura Zawadzke, Jean-Christophe Harmange, James E Audia, Barbara M Bryant, Richard T Cummings, Steven R Magnuson, Jane L Grogan, Steve F Bellon, Brian K Albrecht, Robert J Sims, Jose M Lora
Covalent modification of histones is a fundamental mechanism of regulated gene expression in eukaryotes, and interpretation of histone modifications is an essential feature of epigenetic control. Bromodomains are specialized binding modules that interact with acetylated histones, linking chromatin recognition to gene transcription. Because of their ability to function in a domain-specific fashion, selective disruption of bromodomain:acetylated histone interactions with chemical probes serves as a powerful means for understanding biological processes regulated by these chromatin adaptors...
June 17, 2016: Journal of Biological Chemistry
Callum N Watson, Steven W Kerrigan, Dermot Cox, Ian R Henderson, Steve P Watson, Mònica Arman
Gram-negative Escherichia coli cause diseases such as sepsis and hemolytic uremic syndrome in which thrombotic disorders can be found. Direct platelet-bacterium interactions might contribute to some of these conditions; however, mechanisms of human platelet activation by E. coli leading to thrombus formation are poorly understood. While the IgG receptor FcγRIIA has a key role in platelet response to various Gram-positive species, its role in activation to Gram-negative bacteria is poorly defined. This study aimed to investigate the molecular mechanisms of human platelet activation by E...
September 2016: Platelets
Kathleen M MacQueen, Sarah Dlamini, Brian Perry, Eunice Okumu, Steve Sortijas, Chitra Singh, Diantha Pillay, Alesha Majors, Sonja Jerome, Sharon Watson, Salim Abdool Karim, Quarraisha Abdool Karim, Leila E Mansoor
CAPRISA 008, an open-label extension study of tenofovir gel with coitally-related dosing, provided an opportunity to explore the relationship between product adherence and gender dynamics in a context where women knew they were receiving an active product with evidence of HIV prevention effectiveness. Interviews with 63 CAPRISA 008 participants and 13 male partners in KwaZulu-Natal, South Africa, highlighted that the process of negotiating gel use was determined in part by relationship dynamics including the duration of the relationship, the living situation, an evaluation of the relationship (e...
March 5, 2016: AIDS and Behavior
Abhishek Chauhan, David H Adams, Steve P Watson, Patricia F Lalor
Growing lines of evidence recognize that platelets play a central role in liver homeostasis and pathobiology. Platelets have important roles at every stage during the continuum of liver injury and healing. These cells contribute to the initiation of liver inflammation by promoting leukocyte recruitment through sinusoidal endothelium. They can activate effector cells, thus amplifying liver damage, and by modifying the hepatic cellular and cytokine milieu drive both hepatoprotective and hepatotoxic processes...
November 2016: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
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