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https://www.readbyqxmd.com/read/29045530/tracking-evolution-of-aromatase-inhibitor-resistance-with-circulating-tumour-dna-analysis-in-metastatic-breast-cancer
#1
Charlotte Fribbens, Isaac Garcia Murillas, Matthew Beaney, Sarah Hrebien, Ben O'Leary, Lucy Kilburn, Karen Howarth, Michael Epstein, Emma Green, Nitzan Rosenfeld, Alistair Ring, Stephen Johnston, Nicholas Turner
Background: Selection of resistance mutations may play a major role in the development of endocrine resistance. ESR1 mutations are rare in primary breast cancer but have high prevalence in patients treated with aromatase inhibitors (AI) for advanced breast cancer. We investigated the evolution of genetic resistance to first line AI therapy using sequential ctDNA sampling in patients with advanced breast cancer. Patients and Methods: 83 patients on first line AI therapy for metastatic breast cancer were enrolled in a prospective study...
October 4, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/29045152/discovery-of-potent-and-orally-bioavailable-macrocyclic-peptide-peptoid-hybrid-cxcr7-modulators
#2
Markus Boehm, Kevin Beaumont, Rhys M Jones, Amit S Kalgutkar, Liying Zhang, Karen Atkinson, Guoyun Bai, Janice A Brown, Heather Eng, Gilles H Goetz, Brian R Holder, Bhagyashree Khunte, Sarah Lazzaro, Chris Limberakis, Sangwoo Ryu, Michael J Shapiro, Laurie Tylaska, Jiangli Yan, Rushia Turner, Siegfried S F Leung, Mahesh Ramaseshan, David A Price, Spiros Liras, Matthew P Jacobson, David J Earp, R Scott Lokey, Alan M Mathiowetz, Elnaz Menhaji-Klotz
The chemokine receptor CXCR7 is an attractive target for a variety of diseases. While several small molecule modulators of CXCR7 have been reported, peptidic macrocycles may provide advantages in terms of potency, selectivity, and reduced off-target activity. We produced a series of peptidic macrocycles that incorporate an N-linked peptoid functionality where the peptoid group enabled us to explore side chain diversity well beyond that of natural amino acids. At the same time, computational calculations and experimental assays were used to track and reduce polarity while closely monitoring physicochemical properties...
October 18, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29045010/characterization-of-carotenoids-in-rhodothermus-marinus
#3
Emanuel Y C Ron, Merichel Plaza, Thordis Kristjansdottir, Roya R R Sardari, Snaedis H Bjornsdottir, Steinn Gudmundsson, Gudmundur Oli Hreggvidsson, Charlotta Turner, Ed W J van Niel, Eva Nordberg-Karlsson
Rhodothermus marinus, a marine aerobic thermophile, was first isolated from an intertidal hot spring in Iceland. In recent years, the R. marinus strain PRI 493 has been genetically modified, which opens up possibilities for targeted metabolic engineering of the species, such as of the carotenoid biosynthetic pathway. In this study, the carotenoids of the R. marinus type-strain DSM 4252(T) , strain DSM 4253, and strain PRI 493 were characterized. Bioreactor cultivations were used for pressurized liquid extraction and analyzed by ultra-high performance supercritical fluid chromatography with diode array and quadropole time-of-flight mass spectrometry detection (UHPSFC-DAD-QTOF/MS)...
October 17, 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/29044420/characterization-of-a-novel-role-for-the-dynamin-mechanoenzymes-in-the-regulation-of-human-sperm-acrosomal-exocytosis
#4
Wei Zhou, Amanda L Anderson, Adrian P Turner, Geoffry N De Iuliis, Adam McCluskey, Eileen A McLaughlin, Brett Nixon
STUDY QUESTION: Does dynamin regulate human sperm acrosomal exocytosis? SUMMARY ANSWER: Our studies of dynamin localization and function have implicated this family of mechanoenzymes in the regulation of progesterone-induced acrosomal exocytosis in human spermatozoa. WHAT IS KNOWN ALREADY: Completion of an acrosome reaction is a prerequisite for successful fertilization in all studied mammalian species. It follows that failure to complete this unique exocytotic event represents a common aetiology in the defective spermatozoa of male infertility patients that have failed IVF in a clinical setting...
October 1, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/29043833/the-fetus-or-the-infant-which-is-the-father-of-the-man-both
#5
Steve Turner, Graham Devereux
No abstract text is available yet for this article.
October 18, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29043786/measuring-nanoparticle-attachment-efficiency-in-complex-systems
#6
Nicholas K Geitner, Niall Joseph O'Brien, Amalia Turner, Enda Cummins, Mark R Wiesner
As process-based environmental fate and transport models for engineered nanoparticles are developed, there is a need for relevant and reliable measures of nanoparticle behaviour. The affinity of nanoparticles for various surfaces (α) is one such measure. Measurements of the affinity of nanoparticles obtained by flowing particles through a porous medium are constrained by the types of materials or exposure scenarios that can be configured into such column studies. Utilizing glass beads and kaolinite as model collector surfaces, we evaluate a previously developed mixing method for measuring nanoparticle attachment to environmental surfaces, and validate this method with an equivalent static column system over a range of organic matter concentrations and ionic strengths...
October 18, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29043774/augmenting-influenza-specific-t-cell-memory-generation-with-a-nkt-cell-dependent-glycolipid-peptide-vaccine
#7
Regan J Anderson, Jasmine Li, Lukasz Kedzierski, Benjamin J Compton, Colin M Hayman, Taryn L Osmond, Ching-Wen Tang, Kathryn J Farrand, Hui-Fern Koay, Catarina Filipa Dos Santos Sa E Almeida, Lauren R Holz, Geoffrey M Williams, Margaret A Brimble, Zhongfang Wang, Marios Koutsakos, Katherine Kedzierska, Dale I Godfrey, Ian F Hermans, Stephen J Turner, Gavin F Painter
The development of a universal vaccine for influenza A virus (IAV) that does not require seasonal modification is a long-standing health goal, particularly in the context of the increasing threat of new global pandemics. Vaccines that specifically induce T cell responses are of considerable interest because they can target viral proteins that are more like-ly to be shared between different virus strains and subtypes and hence provide effective cross-reactive IAV immunity. From a practical perspective, such vaccines should induce T cell responses with long-lasting memory, while also being simple to manufacture and cost-effective...
October 18, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/29043380/are-we-underestimating-microplastic-contamination-in-aquatic-environments
#8
Jeremy L Conkle, Christian D Báez Del Valle, Jeffrey W Turner
Plastic debris, specifically microplastic in the aquatic environment, is an escalating environmental crisis. Efforts at national scales to reduce or ban microplastics in personal care products are starting to pay off, but this will not affect those materials already in the environment or those that result from unregulated products and materials. To better inform future microplastic research and mitigation efforts this study (1) evaluates methods currently used to quantify microplastics in the environment and (2) characterizes the concentration and size distribution of microplastics in a variety of products...
October 17, 2017: Environmental Management
https://www.readbyqxmd.com/read/29042678/carnosine-scavenging-of-glucolipotoxic-free-radicals-enhances-insulin-secretion-and-glucose-uptake
#9
Michael J Cripps, Katie Hanna, Charlie Lavilla, Sophie R Sayers, Paul W Caton, Craig Sims, Luigi De Girolamo, Craig Sale, Mark D Turner
The worldwide prevalence of diabetes has risen to 8.5% among adults, which represents a staggering rise in prevalence from 4.7% in 1980. Whilst some treatments work by increasing insulin secretion, over time their effectiveness decreases. We aim to increase insulin secretion by developing strategies that work through mechanisms independent of current treatment options. Isolated CD1 mouse islets, INS-1 pancreatic β-cells, or C2C12 mouse myotubes were incubated in standard tissue culture media, or media supplemented with 28 mM glucose, 200 μM palmitic acid, and 200 μM oleic acid as a cellular model of diabetic glucolipotoxicity...
October 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29039694/can-a-pink-ribbon-actually-limit-awareness
#10
Jeanine Warisse Turner, Dean Sirjue
No abstract text is available yet for this article.
October 17, 2017: Health Communication
https://www.readbyqxmd.com/read/29039194/microbial-photoelectrosynthesis-for-self-sustaining-hydrogen-generation
#11
Lu Lu, Nicholas B Williams, John Turner, Pin-Ching Maness, Jing Gu, Zhiyong Jason Ren
Current artificial photosynthesis (APS) systems are promising for the storage of solar energy via transportable and storable fuels, but the anodic half-reaction of water oxidation is an energy intensive process which in many cases poorly couples with the cathodic half-reaction. Here we demonstrate a self-sustaining microbial photoelectrosynthesis (MPES) system that pairs microbial electrochemical oxidation with photoelectrochemical water reduction for energy efficient H2 generation. MPES reduces the overall energy requirements thereby greatly expanding the range of semiconductors that can be utilized in APS...
October 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29038599/widespread-white-matter-microstructural-differences-in-schizophrenia-across-4322-individuals-results-from-the-enigma-schizophrenia-dti-working-group
#12
S Kelly, N Jahanshad, A Zalesky, P Kochunov, I Agartz, C Alloza, O A Andreassen, C Arango, N Banaj, S Bouix, C A Bousman, R M Brouwer, J Bruggemann, J Bustillo, W Cahn, V Calhoun, D Cannon, V Carr, S Catts, J Chen, J-X Chen, X Chen, C Chiapponi, Kl K Cho, V Ciullo, A S Corvin, B Crespo-Facorro, V Cropley, P De Rossi, C M Diaz-Caneja, E W Dickie, S Ehrlich, F-M Fan, J Faskowitz, H Fatouros-Bergman, L Flyckt, J M Ford, J-P Fouche, M Fukunaga, M Gill, D C Glahn, R Gollub, E D Goudzwaard, H Guo, R E Gur, R C Gur, T P Gurholt, R Hashimoto, S N Hatton, F A Henskens, D P Hibar, I B Hickie, L E Hong, J Horacek, F M Howells, H E Hulshoff Pol, C L Hyde, D Isaev, A Jablensky, P R Jansen, J Janssen, E G Jönsson, L A Jung, R S Kahn, Z Kikinis, K Liu, P Klauser, C Knöchel, M Kubicki, J Lagopoulos, C Langen, S Lawrie, R K Lenroot, K O Lim, C Lopez-Jaramillo, A Lyall, V Magnotta, R C W Mandl, D H Mathalon, R W McCarley, S McCarthy-Jones, C McDonald, S McEwen, A McIntosh, T Melicher, R I Mesholam-Gately, P T Michie, B Mowry, B A Mueller, D T Newell, P O'Donnell, V Oertel-Knöchel, L Oestreich, S A Paciga, C Pantelis, O Pasternak, G Pearlson, G R Pellicano, A Pereira, J Pineda Zapata, F Piras, S G Potkin, A Preda, P E Rasser, D R Roalf, R Roiz, A Roos, D Rotenberg, T D Satterthwaite, P Savadjiev, U Schall, R J Scott, M L Seal, L J Seidman, C Shannon Weickert, C D Whelan, M E Shenton, J S Kwon, G Spalletta, F Spaniel, E Sprooten, M Stäblein, D J Stein, S Sundram, Y Tan, S Tan, S Tang, H S Temmingh, L T Westlye, S Tønnesen, D Tordesillas-Gutierrez, N T Doan, J Vaidya, N E M van Haren, C D Vargas, D Vecchio, D Velakoulis, A Voineskos, J Q Voyvodic, Z Wang, P Wan, D Wei, T W Weickert, H Whalley, T White, T J Whitford, J D Wojcik, H Xiang, Z Xie, H Yamamori, F Yang, N Yao, G Zhang, J Zhao, T G M van Erp, J Turner, P M Thompson, G Donohoe
The regional distribution of white matter (WM) abnormalities in schizophrenia remains poorly understood, and reported disease effects on the brain vary widely between studies. In an effort to identify commonalities across studies, we perform what we believe is the first ever large-scale coordinated study of WM microstructural differences in schizophrenia. Our analysis consisted of 2359 healthy controls and 1963 schizophrenia patients from 29 independent international studies; we harmonized the processing and statistical analyses of diffusion tensor imaging (DTI) data across sites and meta-analyzed effects across studies...
October 17, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/29038354/association-of-urinary-citrate-excretion-ph-and-net-gastrointestinal-alkali-absorption-with-diet-diuretic-use-and-blood-glucose-concentration
#13
Majuran Perinpam, Erin B Ware, Jennifer A Smith, Stephen T Turner, Sharon L R Kardia, John C Lieske
Urinary citrate (Ucit) protects against urinary stone formation. Acid base status and diet influence Ucit. However, the effect of demographics, diet, and glucose metabolism on Ucit excretion, urinary pH (U-pH) and net gastrointestinal alkali absorption (NAA) are not known. Twenty-four hour urine samples, blood glucose, creatinine, and cystatin C were obtained from non-Hispanic white sibships in Rochester, MN (n = 446; 64.5 ± 9 years; 58% female). Diet was assessed by a food frequency questionnaire. The impact of blood glucose, demographics and dietary elements on Ucit excretion, U-pH, and NAA were evaluated in bivariate and multivariable models and interaction models that included age, sex, and weight...
October 2017: Physiological Reports
https://www.readbyqxmd.com/read/29038242/activity-dependent-facilitation-of-cav1-3-calcium-channels-promotes-kca3-1-activation-in-hippocampal-neurons
#14
Giriraj Sahu, Hadhimulya Asmara, Fang-Xiong Zhang, Gerald W Zamponi, Ray W Turner
CaV1 L-type calcium channels are key to regulating neuronal excitability, with the range of functional roles enhanced by interactions with calmodulin, accessory proteins, or CaMKII that modulate channel activity. In hippocampal pyramidal cells a prominent elevation of CaV1 activity is apparent in late channel openings that can last for seconds following a depolarizing stimulus train. The current study tested the hypothesis that a reported interaction between CaV1.3 channels, the scaffolding protein densin, and CaMKII could generate a facilitation of channel activity that outlasts a depolarizing stimulus...
October 16, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29038225/role-of-proximal-optimization-technique-guided-by-intravascular-ultrasound-on-stent-expansion-stent-symmetry-index-and-side-branch-hemodynamics-in-patients-with-coronary-bifurcation-lesions
#15
Diaa Hakim, Arka Chatterjee, Olusuen Alli, Joshua Turner, Assad Sattar, Nicolas Foin, Massoud A Leesar
BACKGROUND: Bench models of coronary bifurcation lesions demonstrated that the proximal optimization technique (POT) expanded the stent and opened the side branch (SB). We investigated the role of POT guided by intravascular ultrasound on the main vessel (MV) stent expansion and SB fractional flow reserve (FFR) in patients with coronary bifurcation lesion. METHODS AND RESULTS: In 40 patients with coronary bifurcation lesion, 120 intravascular ultrasound examinations of the MV were performed at baseline, after MV stenting, and POT followed by 95 FFR measurements of the SB...
October 2017: Circulation. Cardiovascular Interventions
https://www.readbyqxmd.com/read/29038176/maternal-body-mass-index-and-the-prevalence-of-spontaneous-and-elective-preterm-deliveries-in-an-irish-obstetric-population-a-retrospective-cohort-study
#16
Angela Vinturache, Aoife McKeating, Niamh Daly, Sharon Sheehan, Michael Turner
OBJECTIVE: To estimate the association between maternal body mass index (BMI) and risk of spontaneous preterm delivery (sPTD) and elective preterm delivery (ePTD) in singleton and multiple pregnancies. DESIGN: Retrospective cohort study. SETTING: Electronic records of all deliveries from 2009 through 2013 in a tertiary university hospital were abstracted for demographic and obstetrical information. PARTICIPANTS: A total of 38 528 deliveries were included...
October 15, 2017: BMJ Open
https://www.readbyqxmd.com/read/29038093/patient-portal-use-and-experience-among-older-adults-systematic-review
#17
Dawn K Sakaguchi-Tang, Alyssa L Bosold, Yong K Choi, Anne M Turner
BACKGROUND: The older adult population (65 years or older) in the United States is growing, and it is important for communities to consider ways to support the aging population. Patient portals and electronic personal health records (ePHRs) are technologies that could better serve populations with the highest health care needs, such as older adults. OBJECTIVE: The aim of this study was to assess the existing research landscape related to patient portal and ePHR use and experience among older adults and to understand the benefits and barriers to older adults' use and adoption of patient portals and ePHRs...
October 16, 2017: JMIR Medical Informatics
https://www.readbyqxmd.com/read/29037807/dicer1-related-sertoli-leydig-cell-tumor-and-gynandroblastoma-clinical-and-genetic-findings-from-the-international-ovarian-and-testicular-stromal-tumor-registry
#18
Kris Ann P Schultz, Anne K Harris, Michael Finch, Louis P Dehner, Jubilee B Brown, David M Gershenson, Robert H Young, Amanda Field, Weiying Yu, Joyce Turner, Nicholas G Cost, Dominik T Schneider, Douglas R Stewart, A Lindsay Frazier, Yoav Messinger, D Ashley Hill
BACKGROUND: Ovarian sex cord-stromal tumors (OSCST) include juvenile granulosa cell tumors (JGCT), Sertoli-Leydig cell tumor (SLCT) and gynandroblastoma (GAB) among others. These ovarian sex cord-stromal tumors as well as other tumors including pleuropulmonary blastoma (PPB) may be associated with DICER1 mutations. We sought to describe the clinical and genetic findings from the first 107 individuals enrolled in the International Ovarian and Testicular Stromal Tumor Registry. METHODS: Medical and family history were obtained for individuals consecutively enrolled in the International Ovarian and Testicular Stromal Tumor Registry...
October 13, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/29035265/hydrothermal-impacts-on-trace-element-and-isotope-ocean-biogeochemistry
#19
C R German, K A Casciotti, J-C Dutay, L E Heimbürger, W J Jenkins, C I Measures, R A Mills, H Obata, R Schlitzer, A Tagliabue, D R Turner, H Whitby
Hydrothermal activity occurs in all ocean basins, releasing high concentrations of key trace elements and isotopes (TEIs) into the oceans. Importantly, the calculated rate of entrainment of the entire ocean volume through turbulently mixing buoyant hydrothermal plumes is so vigorous as to be comparable to that of deep-ocean thermohaline circulation. Consequently, biogeochemical processes active within deep-ocean hydrothermal plumes have long been known to have the potential to impact global-scale biogeochemical cycles...
November 28, 2016: Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/29034999/home-supply-of-emergency-oral-steroids-and-reduction-in-asthma-healthcare-utilization
#20
Lisa M Sarzynski, Tiffany Turner, David R Stukus, Elizabeth Allen
OBJECTIVE: To determine if children with moderate-to-severe persistent asthma have decreased healthcare utilization after receiving a prescription and instructions to use an at home emergency supply of oral steroids during asthma exacerbations. METHODS: A quasi-experimental design study with a historical control from retrospective chart review was performed for patients aged 2-18 years seen in a tertiary care pediatric pulmonary clinic for moderate to severe persistent asthma...
October 16, 2017: Pediatric Pulmonology
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