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https://www.readbyqxmd.com/read/28323954/heterogeneity-of-calcium-responses-to-secretagogues-in-corticotrophs-from-male-rats
#1
Nicola Romanò, Heather McClafferty, Jamie J Walker, Paul Le Tissier, Michael J Shipston
Heterogeneity in homotypic cellular responses is an important feature of many biological systems, and has been shown to be prominent in most anterior pituitary hormonal cell types. Here we analyse heterogeneity in the responses to hypothalamic secretagogues in the corticotroph cell population of adult male rats. Using the genetically-encoded calcium indicator GCaMP6s, we determined the intracellular calcium responses of these cells to CRH and AVP. Our experiments revealed marked population heterogeneity in the response to these peptides, in terms of amplitude and dynamics of the responses, as well as the sensitivity to different concentrations and duration of stimuli...
March 16, 2017: Endocrinology
https://www.readbyqxmd.com/read/28323868/-waiting-for-daas-a-retrospective-chart-review-of-patients-with-untreated-hepatitis-c-in-rwanda
#2
Neil Gupta, Jules Kabahizi, Constance Mukabatsinda, Timothy David Walker, Emmanuel Musabeyezu, Athanase Kiromera, Jennifer Ilo Van Nuil, Kevin Steiner, Joia Mukherjee, Sabin Nsanzimana, Aimable Mbituyumuremyi
BACKGROUND: Access to treatment for hepatitis C virus (HCV) in sub-Saharan Africa is extremely limited. With the advent of direct acting antivirals (DAAs), highly effective and easy-to-deliver oral regimens are now available on the global market. This study was conducted to understand the background and characteristics of a national cohort of patients with HCV infection enrolled in care and awaiting therapy with DAAs. METHODS AND FINDINGS: We conducted a retrospective chart review of all adult patients with confirmed HCV infection who were currently enrolled in care and treatment at the four existing hepatitis referral centers in Rwanda...
2017: PloS One
https://www.readbyqxmd.com/read/28323481/the-emergence-of-life-as-a-first-order-phase-transition
#3
Cole Mathis, Tanmoy Bhattacharya, Sara Imari Walker
It is well known that life on Earth alters its environment over evolutionary and geological timescales. An important open question is whether this is a result of evolutionary optimization or a universal feature of life. In the latter case, the origin of life would be coincident with a shift in environmental conditions. Here we present a model for the emergence of life in which replicators are explicitly coupled to their environment through the recycling of a finite supply of resources. The model exhibits a dynamic, first-order phase transition from nonlife to life, where the life phase is distinguished by selection on replicators...
March 2017: Astrobiology
https://www.readbyqxmd.com/read/28323406/affinity-selection-mass-spectrometry-identifies-a-novel-antibacterial-rna-polymerase-inhibitor
#4
Scott S Walker, David Degen, Elliott Nickbarg, Donna Carr, Aileen Soriano, Mihir Baran Mandal, Ronald E Painter, Payal R Sheth, Li Xiao, Xinwei Sher, Nicholas Murgolo, Jing Su, David B Olsen, Richard H Ebright, Katherine Young
The growing prevalence of drug-resistant Gram-negative bacteria is a significant global threat to human health. Rifampicin, an RNA polymerase-targeting agent, is an important part of the antibacterial armamentarium; however the emergence of resistance requires that it be used against only certain infections and usually in combination with another antibiotic. While rifampicin has significant clinical limitations, it does show that bacterial RNA polymerase can be an effective target for antibacterial intervention...
March 21, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28319122/can-a-simulation-based-training-program-impact-the-use-of-evidence-based-routine-practices-at-birth-results-of-a-hospital-based-cluster-randomized-trial-in-mexico
#5
Jimena Fritz, Dilys M Walker, Susanna Cohen, Gustavo Angeles, Hector Lamadrid-Figueroa
BACKGROUND: In Mexico, although the majority of births are attended in hospitals, reports have emerged of obstetric violence, use of unsafe practices, and failure to employ evidence-based practices (EBP). Recent attention has refocused global efforts towards provision of quality care that is both patient-centered and evidence-based. Scaling up of local interventions should rely on strong evidence of effectiveness. OBJECTIVE: To perform a secondary analysis to evaluate the impact of a simulation and team-training program (PRONTO) on the performance of EBP in normal births...
2017: PloS One
https://www.readbyqxmd.com/read/28319080/adverse-impact-of-high-donor-cd3-cell-dose-on-outcome-following-tandem-auto-nma-allogeneic-transplantation-for-high-risk-myeloma
#6
A P Nair, P Walker, A Kalff, K Bergin, J Hocking, S Avery, D J Curtis, S Patil, T Das, D Klarica, S Morgan, J Muirhead, M Gorniak, J Reynolds, A Spencer
High-risk (HR) multiple myeloma (MM) has poor outcomes with conventional therapy. Tandem autologous-non-myeloablative (NMA) allogeneic stem cell transplantation (autologous stem cell transplantation (ASCT)-NMA allogeneic SCT) is potentially curative secondary to graft-versus-myeloma effect. We retrospectively analysed ASCT-NMA allogeneic SCT outcomes of 59 HR and relapsed MM patients. At a median follow-up of 35.8 months, the outcomes for HR-MM upfront tandem ASCT-NMA allogeneic SCT and standard-risk (SR) MM upfront ASCT alone were comparable (median PFS 1166 days versus 1465 days, P=0...
March 20, 2017: Bone Marrow Transplantation
https://www.readbyqxmd.com/read/28318492/-brain-tumor-immunotherapy-illusion-or-hope
#7
REVIEW
Denis Migliorini, Valérie Dutoit, Paul R Walker, Pierre-Yves Dietrich
Immunotherapy has proven efficient for many tumors and is now part of standard of care in many indications. What is the picture for brain tumors? The recent development of anti-CTLA-4 and PD1 immune checkpoint inhibitors, which have the ability to restore T lymphocytes activity, has gathered enthusiasm and is now paving the way towards more complex models of immune system manipulation. These models include, among others, vaccination and adoptive T cell transfer technologies. Complementary to those strategies, molecules capable of reshaping the immune tumor microenvironment are currently being investigated in early phase trials...
March 16, 2017: Bulletin du Cancer
https://www.readbyqxmd.com/read/28318231/paraben-concentrations-in-maternal-urine-and-breast-milk-and-its-association-with-personal-care-product-use
#8
Mandy Fisher, Susan MacPherson, Joseph M Braun, Russ Hauser, Mark Walker, Mark Feeley, Ranjeeta Mallick, René Bérubé, Tye E Arbuckle
Parabens are broad-spectrum antimicrobial preservatives and fragrances used in a wide range of personal care products, pharmaceuticals, and food providing the opportunity for people to be exposed on a daily basis. In 2009-2010, 80 pregnant women from Ottawa Canada participated in the Plastics and Personal-Care Product Use in Pregnancy (P4) Study. A subset of women (n = 31) who provided multiple spot urine samples (n = 542) collected over two 24-h periods had their samples analyzed for methylparaben (MP), n-propylparaben (PP), ethylparaben (EP), butylparaben (BP), isobutylparaben (IBP), and benzylparaben (BzP)...
March 20, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28317098/cgrp-receptor-activity-in-mice-with-global-expression-of-human-receptor-activity-modifying-protein-1
#9
Keegan J Bohn, Baolin Li, Xiaofang Huang, Bianca N Mason, Anne-Sophie Wattiez, Adisa Kuburas, Christopher S Walker, Peiyi Yang, Jianliang Yu, Beverly A Heinz, Kirk W Johnson, Andrew F Russo
BACKGROUND AND PURPOSE: CGRP is a potent vasodilator and nociceptive neuropeptide linked to migraine. CGRP receptors are heterodimers of receptor activity-modifying protein-1 (RAMP1) and either calcitonin receptor-like receptor (CLR), which forms the canonical CGRP receptor, or calcitonin receptor (CTR), which forms the amylin-1 (AMY1 ) receptor. The goal of this study was to test whether transgenic mice globally expressing human RAMP1 (hRAMP1) have increased CGRP receptor activity and whether the receptors are sensitive to the human selective antagonist telcagepant...
March 20, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28315196/docbate-a-national-medical-student-debate
#10
Roxanne C Keynejad, Sivahamy Creed, Matthew Fernando, David Bell, David Codling, George Crowther, Judith R Harrison, Saba Jaleel, Kimberley Kendall, Lauren Megahey, Edward Noble, Claire O'Donnell, Felicity Pilcher, Tara Walker, David McLaughlan
No abstract text is available yet for this article.
March 17, 2017: Academic Psychiatry
https://www.readbyqxmd.com/read/28314558/a-patient-and-provider-research-agenda-on-diabetes-and-hypertension-management
#11
Emily B Zimmerman, Sarah K Cook, Amber D Haley, Steven H Woolf, Sarah K Price, Danielle Berman, Thomas DeLeire, Rebecca Etz, Jag Khalsa, Kirsten Knutson, Kathryn Kolasa, Alex Krist, Anton Kuzel, Pearl Lee, Theresa J Nartea, Gretchen Piatt, Hilary Seligman, Joni Strom Williams, Josh Brown, Jennifer Early, Jill Hellman, Julie Karr, Megan Kervin, Isra Malik, Albert Walker, Sheila Goode, Danita Gregory, Sharon Herman, Brenda Kenney, Chimere Miles, Audrey Smith, Travis White
INTRODUCTION: A demonstration project in Richmond, Virginia involved patients and other stakeholders in the creation of a research agenda on dietary and behavioral management of diabetes and hypertension. Given the impact of these diseases on morbidity and mortality, considerable research has been directed at the challenges patients face in chronic disease management. The continuing need to understand disparities and find evidence-based interventions to improve outcomes has been fruitful, but disparities and unmet needs persist...
March 14, 2017: American Journal of Preventive Medicine
https://www.readbyqxmd.com/read/28314188/pharmaceutical-analysis-of-a-novel-propargyl-linked-antifolate-antibiotic-in-the-mouse
#12
John Hoody, Jeremy B Alverson, Santosh Keshipeddy, Patrick A Barney, Larissa Walker, Amy C Anderson, Dennis L Wright, Nigel D Priestley
Antimicrobial resistance to current antibiotics is a significant public health problem and the need for new antibiotics is a compelling one. We have been developing a new series of antibiotics, propargyl-linked diaminopyrimidines, based on the structure of trimethoprim. To date we have discovered compounds that are effective inhibitors of dihydrofolate reductase (the target of trimethoprim), that are potent antibiotics in vitro against a range of Gram-positive pathogens including methicillin-resistant S. aureus, and that are non-toxic in mammalian cell culture...
March 6, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28306747/hypothermic-stunning-of-green-sea-turtles-in-a-western-gulf-of-mexico-foraging-habitat
#13
Donna J Shaver, Philippe E Tissot, Mary M Streich, Jennifer Shelby Walker, Cynthia Rubio, Anthony F Amos, Jeffrey A George, Michelle R Pasawicz
Texas waters provide one of the most important developmental and foraging habitats for juvenile green turtles (Chelonia mydas) in the western Gulf of Mexico, but hypothermic stunning is a significant threat and was the largest cause of green turtle strandings in Texas from 1980 through 2015; of the 8,107 green turtles found stranded, 4,529 (55.9%) were victims of hypothermic stunning. Additionally, during this time, 203 hypothermic stunned green turtles were found incidentally captured due to power plant water intake entrapment...
2017: PloS One
https://www.readbyqxmd.com/read/28306575/e-prescribing-in-the-acute-care-setting-determining-the-educational-and-motivational-needs-of-healthcare-providers
#14
Sally Villaseñor, Tara Walker, Lisa Fetters, Maryanne McCoy
The study sought to determine the barriers to e-prescribing particular to the acute care setting, the educational and motivational needs of acute care providers, and the optimal process for incentive, education, and implementation of e-prescribing. A theoretically based survey instrument was adapted from previous work. Four domains were assessed: finesse, intent to use, perceived usefulness, and perceived ease of use. The survey was offered to a group of acute care providers. The educational and motivational needs of acute care providers are different from those in primary care...
March 16, 2017: Computers, Informatics, Nursing: CIN
https://www.readbyqxmd.com/read/28306283/limits-of-strong-field-rescattering-in-the-relativistic-regime
#15
M Klaiber, K Z Hatsagortsyan, J Wu, S S Luo, P Grugan, B C Walker
Recollision for a laser driven atomic system is investigated in the relativistic regime via a strong field quantum description and Monte Carlo semiclassical approach. We find the relativistic recollision energy cutoff is independent of the ponderomotive potential U_{p}, in contrast to the well-known 3.2U_{p} scaling. The relativistic recollision energy cutoff is determined by the ionization potential of the atomic system and achievable with non-negligible recollision flux before entering a "rescattering free" interaction...
March 3, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28306145/functional-status-modifies-the-association-of-blood-pressure-with-death-in-elders-health-and-retirement-study
#16
Chenkai Wu, Ellen Smit, Carmen A Peralta, Harini Sarathy, Michelle C Odden
OBJECTIVE: To examine whether grip strength, gait speed, and the combination of the two physical functioning measures modified the association of systolic BP (SBP) and diastolic BP (DBP) with mortality. DESIGN: Nationally representative cohort study. SETTING: Health and Retirement Study. PARTICIPANTS: 7,492 U.S. adults aged ≥65 years. MEASUREMENTS: Grip strength was measured by a hand dynamometer and classified as normal (≥16 kg for female; ≥26 kg for male) and weak...
March 17, 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/28304294/long-term-cognitive-decline-in-dementia-with-lewy-bodies-in-a-large-multicenter-international-cohort
#17
Milica G Kramberger, Bjørn Auestad, Sara Garcia-Ptacek, Carla Abdelnour, Josep Garre Olmo, Zuzana Walker, Afina W Lemstra, Elisabet Londos, Frederic Blanc, Laura Bonanni, Ian McKeith, Bengt Winblad, Frank Jan de Jong, Flavio Nobili, Elka Stefanova, Maria Petrova, Cristian Falup-Pecurariu, Irena Rektorova, Sevasti Bostantjopoulou, Roberta Biundo, Daniel Weintraub, Dag Aarsland
BACKGROUND/OBJECTIVE: The aim of this study was to describe the rate and clinical predictors of cognitive decline in dementia with Lewy bodies (DLB), and compare the findings with Alzheimer's disease (AD) and Parkinson's disease dementia (PDD) patients. METHODS: Longitudinal scores for the Mini-Mental State Examination (MMSE) in 1,290 patients (835 DLB, 198 PDD, and 257 AD) were available from 18 centers with up to three years longitudinal data. Linear mixed effects analyses with appropriate covariates were used to model MMSE decline over time...
March 10, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28304184/chronic-stress-induced-disruption-of-the-peri-infarct-neurovascular-unit-following-experimentally-induced-photothrombotic-stroke
#18
Zidan Zhao, Lin Kooi Ong, Sarah Johnson, Michael Nilsson, Frederick R Walker
How stress influences brain repair is an issue of considerable importance, as patients recovering from stroke are known to experience high and often unremitting levels of stress post-event. In the current study, we investigated how chronic stress modified the key cellular components of the neurovascular unit. Using an experimental model of focal cortical ischemia in male C57BL/6 mice, we examined how exposure to a persistently aversive environment, induced by the application of chronic restraint stress, altered the cortical remodeling post-stroke...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28303569/efficacy-and-safety-of-mifepristone-buccal-misoprostol-for-early-medical-abortion-in-an-australian-clinical-setting
#19
Philip Goldstone, Clara Walker, Katherine Hawtin
BACKGROUND: In 2014, a composite pack containing mifepristone-buccal misoprostol, indicated for use to 63 days gestation replaced the existing regimen for early medical abortion (EMA) in Australia. AIMS: To provide updated efficacy and safety information for the use of mifepristone-buccal misoprostol for EMA in Australia, and assess the effect of patient age and gestational age on efficacy. MATERIALS AND METHODS: Observational cohort study of 15 008 women attending one of 16 Marie Stopes International clinics in Australia for an EMA (gestational age ≤ 63 days) between 1 March 2013 and 30 September 2015...
March 17, 2017: Australian & New Zealand Journal of Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/28302607/brain-development-in-fetuses-of-mothers-with-diabetes-a-case-control-mr-imaging-study
#20
F C Denison, G Macnaught, S I K Semple, G Terris, J Walker, D Anblagan, A Serag, R M Reynolds, J P Boardman
BACKGROUND AND PURPOSE: Offspring exposed to maternal diabetes are at increased risk of neurocognitive impairment, but its origins are unknown. With MR imaging, we investigated the feasibility of comprehensive assessment of brain metabolism ((1)H-MRS), microstructure (DWI), and macrostructure (structural MRI) in third-trimester fetuses in women with diabetes and determined normal ranges for the MR imaging parameters measured. MATERIALS AND METHODS: Women with singleton pregnancies with diabetes (n = 26) and healthy controls (n = 26) were recruited prospectively for MR imaging studies between 34 and 38 weeks' gestation...
March 16, 2017: AJNR. American Journal of Neuroradiology
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