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Laura dawson

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https://www.readbyqxmd.com/read/29027252/the-athlete-s-hematological-response-to-hypoxia-a-meta-analysis-on-the-influence-of-altitude-exposure-on-key-biomarkers-of-erythropoiesis
#1
Louisa M Lobigs, Ken Sharpe, Laura A Garvican-Lewis, Christopher J Gore, Peter Peeling, Brian Dawson, Yorck O Schumacher
No abstract text is available yet for this article.
October 13, 2017: American Journal of Hematology
https://www.readbyqxmd.com/read/28983525/exploiting-the-2-amino-1-3-4-thiadiazole-scaffold-to-inhibit-trypanosoma-brucei-pteridine-reductase-in-support-of-early-stage-drug-discovery
#2
Pasquale Linciano, Alice Dawson, Ina Pöhner, David M Costa, Monica S Sá, Anabela Cordeiro-da-Silva, Rosaria Luciani, Sheraz Gul, Gesa Witt, Bernhard Ellinger, Maria Kuzikov, Philip Gribbon, Jeanette Reinshagen, Markus Wolf, Birte Behrens, Véronique Hannaert, Paul A M Michels, Erika Nerini, Cecilia Pozzi, Flavio di Pisa, Giacomo Landi, Nuno Santarem, Stefania Ferrari, Puneet Saxena, Sandra Lazzari, Giuseppe Cannazza, Lucio H Freitas-Junior, Carolina B Moraes, Bruno S Pascoalino, Laura M Alcântara, Claudia P Bertolacini, Vanessa Fontana, Ulrike Wittig, Wolfgang Müller, Rebecca C Wade, William N Hunter, Stefano Mangani, Luca Costantino, Maria P Costi
Pteridine reductase-1 (PTR1) is a promising drug target for the treatment of trypanosomiasis. We investigated the potential of a previously identified class of thiadiazole inhibitors of Leishmania major PTR1 for activity against Trypanosoma brucei (Tb). We solved crystal structures of several TbPTR1-inhibitor complexes to guide the structure-based design of new thiadiazole derivatives. Subsequent synthesis and enzyme- and cell-based assays confirm new, mid-micromolar inhibitors of TbPTR1 with low toxicity. In particular, compound 4m, a biphenyl-thiadiazole-2,5-diamine with IC50 = 16 μM, was able to potentiate the antitrypanosomal activity of the dihydrofolate reductase inhibitor methotrexate (MTX) with a 4...
September 30, 2017: ACS Omega
https://www.readbyqxmd.com/read/28974734/knockout-of-the-epilepsy-gene-depdc5-in-mice-causes-severe-embryonic-dysmorphology-with-hyperactivity-of-mtorc1-signalling
#3
James Hughes, Ruby Dawson, Melinda Tea, Dale McAninch, Sandra Piltz, Dominique Jackson, Laura Stewart, Michael G Ricos, Leanne M Dibbens, Natasha L Harvey, Paul Thomas
DEPDC5 mutations have recently been shown to cause epilepsy in humans. Evidence from in vitro studies has implicated DEPDC5 as a negative regulator of mTORC1 during amino acid insufficiency as part of the GATOR1 complex. To investigate the role of DEPDC5 in vivo we generated a null mouse model using targeted CRISPR mutagenesis. Depdc5 homozygotes display severe phenotypic defects between 12.5-15.5 dpc, including hypotrophy, anaemia, oedema, and cranial dysmorphology as well as blood and lymphatic vascular defects...
October 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28925929/canadian-guidelines-for-controlled-pediatric-donation-after-circulatory-determination-of-death-summary-report
#4
Matthew J Weiss, Laura Hornby, Bram Rochwerg, Michael van Manen, Sonny Dhanani, V Ben Sivarajan, Amber Appleby, Mary Bennett, Daniel Buchman, Catherine Farrell, Aviva Goldberg, Rebecca Greenberg, Ram Singh, Thomas A Nakagawa, William Witteman, Jill Barter, Allon Beck, Kevin Coughlin, Alf Conradi, Cynthia Cupido, Rosanne Dawson, Anne Dipchand, Darren Freed, Karen Hornby, Valerie Langlois, Cheryl Mack, Meagan Mahoney, Deepak Manhas, Christopher Tomlinson, Samara Zavalkoff, Sam D Shemie
OBJECTIVES: Create trustworthy, rigorous, national clinical practice guidelines for the practice of pediatric donation after circulatory determination of death in Canada. METHODS: We followed a process of clinical practice guideline development based on World Health Organization and Canadian Medical Association methods. This included application of Grading of Recommendations Assessment, Development, and Evaluation methodology. Questions requiring recommendations were generated based on 1) 2006 Canadian donation after circulatory determination of death guidelines (not pediatric specific), 2) a multidisciplinary symposium of national and international pediatric donation after circulatory determination of death leaders, and 3) a scoping review of the pediatric donation after circulatory determination of death literature...
November 2017: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/28923223/an-update-on-randomized-clinical-trials-in-hepatocellular-carcinoma
#5
REVIEW
Hao-Wen Sim, Jennifer Knox, Laura A Dawson
Hepatocellular carcinoma is a common malignancy that typically occurs in the setting of comorbid liver disease. Optimal management is challenging, especially given the assortment of available treatment modalities. This article reviews the randomized clinical trials that have formed the basis of contemporary hepatocellular carcinoma management.
October 2017: Surgical Oncology Clinics of North America
https://www.readbyqxmd.com/read/28886361/survival-of-the-fittest-darwinian-selection-underpins-chemotherapy-resistance-in-aml
#6
Laura MacPherson, Mark A Dawson
Intratumor heterogeneity driving therapeutic resistance is a major challenge in cancer management. Recently in Nature, Shlush et al. (2017) provide a tour de force of genomics coupled to functional assays to demonstrate that resistance emerges from a pre-existing subpopulation of acute myeloid leukemia (AML) cells with a stem cell transcription program.
September 7, 2017: Cell Stem Cell
https://www.readbyqxmd.com/read/28871989/long-term-outcomes-of-phase-1-and-2-studies-of-sbrt-for-hepatic-colorectal-metastases
#7
Andrew McPartlin, Anand Swaminath, Ri Wang, Melania Pintilie, James Brierley, John Kim, Jolie Ringash, Rebecca Wong, Rob Dinniwell, Tim Craig, Laura A Dawson
PURPOSE: To report mature outcomes of prospective phase 1 and 2 studies of stereotactic body radiation therapy (SBRT) for the treatment of colorectal liver metastases (CLMs). METHODS AND MATERIALS: Patients with histologically confirmed CLMs unsuitable for resection or standard therapies were eligible for sequential phase 1 and 2 studies conducted from 2003 to 2012. RESULTS: Of 60 patients treated, 82% had received previous chemotherapy, 23% had undergone previous focal liver treatment, and 38% had extrahepatic disease at the time of SBRT...
October 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28865518/radiation-induced-liver-toxicity
#8
REVIEW
Pablo Munoz-Schuffenegger, Sylvia Ng, Laura A Dawson
The advent of highly conformal radiation therapy (RT) has defined a new role for RT in the treatment of both primary and metastatic liver cancer. Despite major advances in how RT is delivered, radiation-induced liver disease (RILD) remains a concern. Classic RILD, characterized by anicteric ascites and hepatomegaly, is unlikely to occur if treating to doses of ≤30Gy in 2Gy per fraction in patients with baseline Child-Pugh A liver function. On the other hand, nonclassic RILD is a spectrum of liver toxicity, including a general decline in liver function and elevation of liver enzymes...
October 2017: Seminars in Radiation Oncology
https://www.readbyqxmd.com/read/28759811/impact-of-cationic-polystyrene-nanoparticles-ps-nh2-on-early-embryo-development-of-mytilus-galloprovincialis-effects-on-shell-formation
#9
Teresa Balbi, Giulia Camisassi, Michele Montagna, Rita Fabbri, Silvia Franzellitti, Cristina Carbone, Kenneth Dawson, Laura Canesi
The potential release of nanoparticles (NPs) into aquatic environments represents a growing concern for their possible impact on aquatic organisms. In this light, exposure studies during early life stages, which can be highly sensitive to environmental perturbations, would greatly help identifying potential adverse effects of NPs. Although in the marine bivalve Mytilus spp. the effects of different types of NPs have been widely investigated, little is known on the effects of NPs on the developing embryo. In M...
November 2017: Chemosphere
https://www.readbyqxmd.com/read/28728602/robot-assisted-training-for-the-upper-limb-after-stroke-ratuls-study-protocol-for-a-randomised-controlled-trial
#10
Helen Rodgers, Lisa Shaw, Helen Bosomworth, Lydia Aird, Natasha Alvarado, Sreeman Andole, David L Cohen, Jesse Dawson, Janet Eyre, Tracy Finch, Gary A Ford, Jennifer Hislop, Steven Hogg, Denise Howel, Niall Hughes, Hermano Igo Krebs, Christopher Price, Lynn Rochester, Elaine Stamp, Laura Ternent, Duncan Turner, Luke Vale, Elizabeth Warburton, Frederike van Wijck, Scott Wilkes
BACKGROUND: Loss of arm function is a common and distressing consequence of stroke. We describe the protocol for a pragmatic, multicentre randomised controlled trial to determine whether robot-assisted training improves upper limb function following stroke. METHODS/DESIGN: Study design: a pragmatic, three-arm, multicentre randomised controlled trial, economic analysis and process evaluation. SETTING: NHS stroke services. PARTICIPANTS: adults with acute or chronic first-ever stroke (1 week to 5 years post stroke) causing moderate to severe upper limb functional limitation...
July 20, 2017: Trials
https://www.readbyqxmd.com/read/28709293/fluorescence-correlation-spectroscopy-experiments-to-quantify-free-diffusion-coefficients-in-reaction-diffusion-systems-the-case-of-ca-2-and-its-dyes
#11
Lorena Sigaut, Cecilia Villarruel, María Laura Ponce, Silvina Ponce Dawson
Many cell signaling pathways involve the diffusion of messengers that bind and unbind to and from intracellular components. Quantifying their net transport rate under different conditions then requires having separate estimates of their free diffusion coefficient and binding or unbinding rates. In this paper, we show how performing sets of fluorescence correlation spectroscopy (FCS) experiments under different conditions, it is possible to quantify free diffusion coefficients and on and off rates of reaction-diffusion systems...
June 2017: Physical Review. E
https://www.readbyqxmd.com/read/28668472/phase-i-dose-escalation-study-of-concurrent-palliative-radiation-therapy-with-sorafenib-in-three-anatomical-cohorts-thorax-abdomen-pelvis-the-tap-study
#12
Louise Murray, Joseph Longo, Jonathan Wan, Caroline Chung, Lisa Wang, Laura Dawson, Michael Milosevic, Amit Oza, Anthony Brade
BACKGROUND AND PURPOSE: To evaluate the tolerability and maximum tolerated dose (MTD) of sorafenib administered concurrently with palliative radiotherapy. MATERIAL AND METHODS: In patients with incurable cancer, sorafenib was escalated independently in three cohorts based on irradiation site: thorax, abdomen or pelvis. Sorafenib was administered days 1-28 and radiotherapy (30Gy in 10 fractions) was delivered days 8-12 and 15-19. Dose-limiting toxicities (DLT) were acute grade 3+ toxicities attributable to radiotherapy...
July 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28619718/click-chemistry-enables-preclinical-evaluation-of-targeted-epigenetic-therapies
#13
Dean S Tyler, Johanna Vappiani, Tatiana Cañeque, Enid Y N Lam, Aoife Ward, Omer Gilan, Yih-Chih Chan, Antje Hienzsch, Anna Rutkowska, Thilo Werner, Anne J Wagner, Dave Lugo, Richard Gregory, Cesar Ramirez Molina, Neil Garton, Christopher R Wellaway, Susan Jackson, Laura MacPherson, Margarida Figueiredo, Sabine Stolzenburg, Charles C Bell, Colin House, Sarah-Jane Dawson, Edwin D Hawkins, Gerard Drewes, Rab K Prinjha, Raphaël Rodriguez, Paola Grandi, Mark A Dawson
The success of new therapies hinges on our ability to understand their molecular and cellular mechanisms of action. We modified BET bromodomain inhibitors, an epigenetic-based therapy, to create functionally conserved compounds that are amenable to click chemistry and can be used as molecular probes in vitro and in vivo. We used click proteomics and click sequencing to explore the gene regulatory function of BRD4 (bromodomain containing protein 4) and the transcriptional changes induced by BET inhibitors. In our studies of mouse models of acute leukemia, we used high-resolution microscopy and flow cytometry to highlight the heterogeneity of drug activity within tumor cells located in different tissue compartments...
June 30, 2017: Science
https://www.readbyqxmd.com/read/28577832/advances-in-stereotactic-body-radiation-therapy-for-hepatocellular-carcinoma
#14
REVIEW
Louise J Murray, Laura A Dawson
Stereotactic Body Radiation Therapy (SBRT) is an emerging effective treatment for hepatocellular carcinoma (HCC) associated with acceptable rates of toxicity in appropriately selected patients. Despite often being reserved for patients unsuitable for other local treatments, prospective and retrospective studies have demonstrated excellent long-term control. SBRT may be used as a stand-alone treatment, or as an adjunct to other HCC therapies. Based on available data, SBRT appears to complement existing local liver therapies...
July 2017: Seminars in Radiation Oncology
https://www.readbyqxmd.com/read/28558193/influence-of-size-and-shape-on-the-anatomical-distribution-of-endotoxin-free-gold-nanoparticles
#15
Laura Talamini, Martina B Violatto, Qi Cai, Marco P Monopoli, Karsten Kantner, Željka Krpetić, André Perez-Potti, Jennifer Cookman, David Garry, Camila P Silveira, Luca Boselli, Beatriz Pelaz, Tommaso Serchi, Sébastien Cambier, Arno C Gutleb, Neus Feliu, Yan Yan, Mario Salmona, Wolfgang J Parak, Kenneth A Dawson, Paolo Bigini
The transport and the delivery of drugs through nanocarriers is a great challenge of pharmacology. Since the production of liposomes to reduce the toxicity of doxorubicin in patients, a plethora of nanomaterials have been produced and characterized. Although it is widely known that elementary properties of nanomaterials influence their in vivo kinetics, such interaction is often poorly investigated in many preclinical studies. The present study aims to evaluate the actual effect of size and shape on the biodistribution of a set of gold nanoparticles (GNPs) after intravenous administration in mice...
June 27, 2017: ACS Nano
https://www.readbyqxmd.com/read/28551770/quality-of-life-following-prophylactic-gynecological-surgery-experiences-of-female-lynch-mutation-carriers
#16
Holly Etchegary, Elizabeth Dicks, Laura Tamutis, Lesa Dawson
Lynch syndrome (LS) is a genetic condition conferring an elevated risk of gastrointestinal, gynecologic and other malignancies, often before the age of 50. Current guidelines recommend prophylactic gynecologic surgery to manage inherited cancers for female mutation carriers. Data is lacking on women's quality of life following surgery. In this pilot study, we explored how women described their quality of life post-prophylactic gynecologic surgery and the factors that affected post-surgery experiences. A qualitative interview study was the chosen design...
May 27, 2017: Familial Cancer
https://www.readbyqxmd.com/read/28445716/trumping-neurodegeneration-targeting-common-pathways-regulated-by-autosomal-recessive-parkinson-s-disease-genes
#17
REVIEW
Laura Scott, Valina L Dawson, Ted M Dawson
Parkinson's disease (PD) is a neurodegenerative movement disorder characterized by the progressive loss of dopaminergic (DA) neurons. Most PD cases are sporadic; however, rare familial forms have been identified. Autosomal recessive PD (ARPD) results from mutations in Parkin, PINK1, DJ-1, and ATP13A2, while rare, atypical juvenile ARPD result from mutations in FBXO7, DNAJC6, SYNJ1, and PLA2G6. Studying these genes and their function has revealed mitochondrial quality control, protein degradation processes, and oxidative stress responses as common pathways underlying PD pathogenesis...
April 23, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28442242/dosimetric-analysis-of-liver-toxicity-after-liver-metastasis-stereotactic-body-radiation-therapy
#18
Aisling Barry, Andrew McPartlin, Patricia Lindsay, Lisa Wang, James Brierley, John Kim, Jolie Ringash, Rebecca Wong, Rob Dinniwell, Tim Craig, Laura A Dawson
PURPOSE: The aim of this study is to describe the incidence and type of liver toxicity seen following liver metastases stereotactic body radiation therapy (SBRT) and the corresponding clinical and dosimetric factors associated with toxicity. METHODS AND MATERIALS: Between 2002 and 2009, 81 evaluable patients with liver metastases were treated on 2 prospective studies assessing SBRT, with prescription doses based on the effective liver volume irradiated evaluated...
September 2017: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28423760/uk-health-and-social-care-case-studies-iterative-technology-development
#19
Adie Blanchard, Laura Gilbert, Tom Dawson
As a result of increasing demand in the face of reducing resources, technology has been implemented in many social and health care services to improve service efficiency. This paper outlines the experiences of deploying a 'Software as a Service' application in the UK social and health care sectors. The case studies demonstrate that every implementation is different, and unique to each organisation. Technology design and integration can be facilitated by ongoing engagement and collaboration with all stakeholders, flexible design, and attention to interoperability to suit services and their workflows...
2017: Studies in Health Technology and Informatics
https://www.readbyqxmd.com/read/28399067/role-of-the-corneal-epithelium-measurements-in-keratorefractive-surgery
#20
REVIEW
Marcella Q Salomão, Ana Luisa Hofling-Lima, Bernardo T Lopes, Ana Laura C Canedo, Daniel G Dawson, Rui Carneiro-Freitas, Renato Ambrósio
PURPOSE OF REVIEW: Refractive surgery has stimulated considerable progress in corneal and anterior segment imaging, and optical characterization of the eye. From front surface corneal topography, we evolved to three-dimensional corneal tomography with limbus to limbus characterization of the front and back corneal surfaces and pachymetric mapping. Corneal anatomical evaluation has further evolved to layered or segmental tomography with the ability to characterize corneal epithelial thickness profile and the elevation of stromal front surface...
July 2017: Current Opinion in Ophthalmology
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