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https://www.readbyqxmd.com/read/28211796/fluence-correction-factor-for-graphite-calorimetry-in-a-clinical-high-energy-carbon-ion-beam
#1
Ana Lourenco, Russell Thomas, Michael Homer, Hugo Bouchard, Severine Rossomme, James Renaud, Tatsuaki Kanai, Gary Royle, Hugo Palmans
The aim of this work is to develop and adapt a formalism to determine absorbed dose to water from graphite calorimetry measurements in carbon-ion beams. Fluence correction factors, <i>k</i><sub>fl</sub>, needed when using a graphite calorimeter to derive dose to water, were determined in a clinical high-energy carbon-ion beam. Measurements were performed in a 290 MeV/n carbon-ion beam with a field size of 11 x 11 cm<sup>2</sup>, without modulation. In order to sample the beam, a plane-parallel Roos ionization chamber was chosen for its small collecting volume in comparison with the field size...
February 17, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28190872/upper-airway-obstruction-requiring-emergent-tracheostomy-secondary-to-laryngeal-sarcoidosis-a-case-report
#2
Changwan Ryu, Erica L Herzog, Hongyi Pan, Robert Homer, Mridu Gulati
BACKGROUND Laryngeal sarcoidosis is a rare extrapulmonary manifestation of sarcoidosis, accounting for 0.33-2.1% of cases. A life-threatening complication of laryngeal sarcoidosis is upper airway obstruction. In this report we describe our experience in the acute and chronic care of a patient who required an emergent tracheostomy, with the aim to provide further insight into this difficult to manage disease. CASE REPORT A 37-year-old African American female with a 10-year history of stage 1 sarcoidosis presented with severe dyspnea...
February 13, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28187771/the-effect-of-estradiol-on-granulosa-cell-responses-to-fsh-in-women-with-polycystic-ovary-syndrome
#3
Michael V Homer, Marcus A Rosencrantz, Rana F Shayya, R Jeffrey Chang
BACKGROUND: The influence of estradiol (E2) on granulosa cell (GC) function has not been tested clinically in women with polycystic ovary syndrome (PCOS). The objective of this study is to determine if E2 influences GC responses to FSH in women with PCOS. METHODS: This is a two phase, single cohort study conducted over a 2-year period at a single academic center. Nine women with PCOS according to NIH criteria. In Phase 1, FSH stimulation of GC responses as measured by E2 and Inhibin B (Inh B) were assessed before and at 5 and 6 weeks after GnRH agonist administration...
February 10, 2017: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/28137784/reducing-liver-function-tests-for-statin-monitoring-an-observational-comparison-of-two-clinical-commissioning-groups
#4
Kate Homer, John Robson, Susannah Solaiman, Abigail Davis, Saima Zubeda Khan, David McCoy, Rohini Mathur, Sally Hull, Kambiz Boomla
BACKGROUND: Current liver function testing for statin monitoring is largely unnecessary and costly. Statins do not cause liver disease. Both reduction in test frequency and use of a single alanine transaminase (ALT) rather than a full seven analyte liver function test (LFT) array would reduce cost and may benefit patients. AIM: To assess LFT testing in relation to statin use and evaluate an intervention to reduce full-array LFTs ordered by GPs for statin monitoring...
January 30, 2017: British Journal of General Practice: the Journal of the Royal College of General Practitioners
https://www.readbyqxmd.com/read/28118206/the-gender-gap-a-longitudinal-examination-of-men-s-and-women-s-art-adherence-in-british-columbia-2000-2014
#5
Cathy M Puskas, Angela Kaida, Cari L Miller, Wendy Zhang, Benita Yip, Neora Pick, Julio S G Montaner, Robert S Hogg
OBJECTIVE: The aim of this study was to observe the effect of sex on attaining optimal adherence to combination antiretroviral therapy (cART) longitudinally, while controlling for known adherence confounders: injection drug use (IDU) and ethnicity. DESIGN: Using the population-based HAART Observational Medical Evaluation and Research (HOMER) cohort, data were collected from HIV-positive adults, ≥19 years, receiving cART in British Columbia (BC), Canada, with data collected between 2000 and 2014...
January 21, 2017: AIDS
https://www.readbyqxmd.com/read/28111165/predicting-falls-in-people-aged-65-years-and-older-from-insurance-claims
#6
Mark L Homer, Nathan P Palmer, Kathe P Fox, Joanne Armstrong, Kenneth D Mandl
BACKGROUND: Accidental falls among people aged 65 years and older caused approximately 2,700,000 injuries, 27,000 deaths, and cost more than 34 billion dollars in the United States annually in recent years. Here, we derive and validate a predictive model for falls based on a retrospective cohort of those 65 years and older. METHODS: Insurance claims from a one year observational period were used to predict a fall-related claim in the following two years. The predictive model takes into account a person's age, sex, prescriptions, and diagnoses...
January 19, 2017: American Journal of Medicine
https://www.readbyqxmd.com/read/28060028/kinetics-of-angiogenic-responses-in-corneal-transplantation
#7
Takenori Inomata, Alireza Mashaghi, Antonio Di Zazzo, Sang-Mok Lee, Homer Chiang, Reza Dana
PURPOSE: To delineate and compare the kinetics of corneal angiogenesis after high-risk (HR) versus low-risk (LR) corneal transplantation. METHODS: In mice, intrastromal sutures were placed in the recipient graft bed 2 weeks before allogeneic transplantation to induce angiogenesis and amplify the risk of graft rejection. Control (LR) graft recipients did not undergo suture placement, and thus the host bed remained avascular at the time of transplantation. Graft hemangiogenesis and opacity scores were evaluated for 8 weeks by slit-lamp biomicroscopy...
January 4, 2017: Cornea
https://www.readbyqxmd.com/read/28008418/regulation-of-group-i-metabotropic-glutamate-receptors-by-mapk-erk-in-neurons
#8
Li-Min Mao, John Q Wang
Group I metabotropic glutamate receptors (mGluR1 and mGluR5 subtypes) are regulated by protein kinases. A recent focus is mitogen-activated protein kinases (MAPK). A prototypic subclass of MAPKs, extracellular signal-regulated kinases (ERK), is densely expressed in adult brain postmitotic neurons. This kinase resides in not only the cytoplasm around the nucleus, also the neuronal peripheral structures such as synapses. Recombinant ERK2 binds to C terminal tails of mGluR1a in vitro and native ERK1/2 forms complexes with mGluR1/5 in neurons in vivo...
2016: Journal of Nature and Science
https://www.readbyqxmd.com/read/28005477/correlates-of-hepatitis-c-virus-infection-in-the-targeted-testing-program-of-the-new-york-city-jail-system
#9
Matthew J Akiyama, Fatos Kaba, Zachary Rosner, Howard Alper, Aimee Kopolow, Alain H Litwin, Homer Venters, Ross MacDonald
OBJECTIVE: The objective of this study was to understand predictors of hepatitis C virus (HCV) antibody positivity in a large urban jail system in New York City. METHODS: We examined demographic characteristics, risk behaviors, and HCV antibody prevalence among 10 790 jail inmates aged 16 to 86 who were screened from June 13, 2013, to June 13, 2014, based on birth cohort or conventional high-risk criteria. We used logistic regression analysis to determine predictors of HCV antibody positivity...
January 2017: Public Health Reports
https://www.readbyqxmd.com/read/27999308/downregulation-of-homer1b-c-in-sod1-g93a-models-of-als-a-novel-mechanism-of-neuroprotective-effect-of-lithium-and-valproic-acid
#10
Hai-Zhi Jiang, Shu-Yu Wang, Xiang Yin, Hong-Quan Jiang, Xu-Dong Wang, Jing Wang, Tian-Hang Wang, Yan Qi, Yue-Qing Yang, Ying Wang, Chun-Ting Zhang, Hong-Lin Feng
BACKGROUND: Mutations in the Cu/Zn superoxide dismutase (SOD1) gene have been linked to amyotrophic lateral sclerosis (ALS). However, the molecular mechanisms have not been elucidated yet. Homer family protein Homer1b/c is expressed widely in the central nervous system and plays important roles in neurological diseases. In this study, we explored whether Homer1b/c was involved in SOD1 mutation-linked ALS. RESULTS: In vitro studies showed that the SOD1 G93A mutation induced an increase of Homer1b/c expression at both the mRNA and protein levels in NSC34 cells...
December 17, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27997464/evaluation-of-the-american-society-of-ophthalmic-plastic-and-reconstructive-surgery-asoprs-fellowship-program-website-content-and-quality
#11
Natalie Homer, Michael K Yoon
PURPOSE: The qualities that applicants value in the American Society of Ophthalmic Plastic and Reconstructive Surgery (ASOPRS) fellowship programs have been studied, but the availability of this information on program websites has not yet been reviewed. The authors evaluated the availability of resident-valued ASOPRS fellowship program information on the Internet. METHODS: The authors performed an Internet search of the 53 ASOPRS fellowship program websites and evaluated websites for 20 characteristics of interest to ASOPRS fellowship applicants such as teaching faculty, program description, rotation schedule, operative cases, and interview information...
December 16, 2016: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/27842511/comparative-assessment-of-two-frailty-instruments-for-risk-stratification-in-elderly-surgical-patients-study-protocol-for-a-prospective-cohort-study
#12
Daniel I McIsaac, Monica Taljaard, Gregory L Bryson, Paul E Beaule, Sylvain Gagne, Gavin Hamilton, Emily Hladkowicz, Allen Huang, John Joanisse, Luke T Lavallée, Hussein Moloo, Kednapa Thavorn, Carl van Walraven, Homer Yang, Alan J Forster
BACKGROUND: Frailty is an aggregate expression of susceptibility to poor outcomes, owing to age-, and disease-related deficits that accumulate within multiple domains. Older patients who are frail before surgery are at an increased risk of morbidity and mortality, and use a disproportionately high amount of healthcare resources. While frailty is now a well-established risk factor for adverse postoperative outcomes, the perioperative literature lacks studies that: 1) compare the predictive accuracy of different frailty instruments; 2) consider the impact of frailty on patient-reported outcome measures; and 3) consider the acceptability and feasibility of using frailty instruments in clinical practice...
November 14, 2016: BMC Anesthesiology
https://www.readbyqxmd.com/read/27793119/obstetric-outcomes-for-women-with-female-genital-mutilation-at-an-australian-hospital-2006-2012-a-descriptive-study
#13
Nesrin Varol, Angela Dawson, Sabera Turkmani, John J Hall, Susie Nanayakkara, Greg Jenkins, Caroline S E Homer, Kevin McGeechan
BACKGROUND: Women, who have been subjected to female genital mutilation (FGM), can suffer serious and irreversible physical, psychological and psychosexual complications. They have more adverse obstetric outcomes as compared to women without FGM. Exploratory studies suggest radical change to abandonment of FGM by communities after migration to countries where FGM is not prevalent. Women who had been subjected to FGM as a child in their countries of origin, require specialised healthcare to reduce complications and further suffering...
October 28, 2016: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/27787439/damage-control-surgery-in-weightlessness-a-comparative-study-of-simulated-torso-hemorrhage-control-comparing-terrestrial-and-weightless-conditions
#14
Andrew W Kirkpatrick, Jessica Lynn McKee, Homer Tien, Anthony J LaPorta, Kit Lavell, Tim Leslie, David R King, Paul B McBeth, Susan Brien, Derek J Roberts, Reginald Franciose, Jonathan Wong, Vivian McAlistair, Danielle Bouchard, Chad G Ball
BACKGROUND: Torso bleeding remains the most preventable cause of post-traumatic death worldwide. Remote damage control resuscitation (RDCR) endeavours to rescue the most catastrophically injured, but has not focused on prehospital surgical torso hemorrhage control (HC). We examined the logistics and metrics of intraperitoneal packing in weightlessness in Parabolic flight (0g) compared to terrestrial gravity (1g) as an extreme example of surgical RDCR. METHODS: A surgical simulator was customized with high-fidelity intraperitoneal anatomy, a "blood" pump and flowmeter...
February 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/27749621/periocular-breast-carcinoma-metastases-predominant-origin-from-the-lobular-variant
#15
Frederick A Jakobiec, Anna M Stagner, Natalie Homer, Michael K Yoon
PURPOSE: To further define the histopathologic features of breast carcinoma conducive to orbital metastasis. METHODS: Ten new female patients with orbital or eyelid breast cancer metastases encountered between 2011 and 2016 had their medical records reviewed for determining their clinical characteristics. Microscopic glass slides from biopsies and immunohistochemical test results were also analyzed. Biomarkers studied included cytokeratin 7, nuclear estrogen and progesterone receptors, HER2, and E-cadherin...
October 5, 2016: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/27740943/theoretical-and-experimental-characterization-of-novel-water-equivalent-plastics-in-clinical-high-energy-carbon-ion-beams
#16
A Lourenço, N Wellock, R Thomas, M Homer, H Bouchard, T Kanai, N MacDougall, G Royle, H Palmans
Water-equivalent plastics are frequently used in dosimetry for experimental simplicity. This work evaluates the water-equivalence of novel water-equivalent plastics specifically designed for light-ion beams, as well as commercially available plastics in a clinical high-energy carbon-ion beam. A plastic- to-water conversion factor [Formula: see text] was established to derive absorbed dose to water in a water phantom from ionization chamber readings performed in a plastic phantom. Three trial plastic materials with varying atomic compositions were produced and experimentally characterized in a high-energy carbon-ion beam...
October 14, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27736153/sh2-domain-containing-phosphatase-2-is-a-novel-antifibrotic-regulator-in-pulmonary-fibrosis
#17
Argyrios Tzouvelekis, Guoying Yu, Christian L Lino Cardenas, Jose D Herazo-Maya, Rong Wang, Tony Woolard, Yi Zhang, Koji Sakamoto, Hojin Lee, Jae-Sung Yi, Giuseppe DeIuliis, Nikolaos Xylourgidis, Farida Ahangari, Patty J Lee, Vassilis Aidinis, Erica L Herzog, Robert Homer, Anton M Bennett, Naftali Kaminski
RATIONALE: Idiopathic pulmonary fibrosis (IPF) is a chronic fatal lung disease with dismal prognosis and no cure. The potential role of the ubiquitously expressed SH2 domain-containing tyrosine phosphatase-2 (SHP2) as a therapeutic target has not been studied in IPF. OBJECTIVES: To determine the expression, mechanistic role, and potential therapeutic usefulness of SHP2 in pulmonary fibrosis. METHODS: The effects of SHP2 overexpression and inhibition on fibroblast response to profibrotic stimuli were analyzed in vitro in primary human and mouse lung fibroblasts...
February 15, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/27669975/increased-levels-of-3-hydroxykynurenine-parallel-disease-severity-in-human-acute-pancreatitis
#18
Christos Skouras, Xiaozhong Zheng, Margaret Binnie, Natalie Z M Homer, Toby B J Murray, Darren Robertson, Lesley Briody, Finny Paterson, Heather Spence, Lisa Derr, Alastair J Hayes, Andreas Tsoumanis, Dawn Lyster, Rowan W Parks, O James Garden, John P Iredale, Iain J Uings, John Liddle, Wayne L Wright, George Dukes, Scott P Webster, Damian J Mole
Inhibition of kynurenine 3-monooxygenase (KMO) protects against multiple organ dysfunction (MODS) in experimental acute pancreatitis (AP). We aimed to precisely define the kynurenine pathway activation in relation to AP and AP-MODS in humans, by carrying out a prospective observational study of all persons presenting with a potential diagnosis of AP for 90 days. We sampled peripheral venous blood at 0, 3, 6, 12, 24, 48, 72 and 168 hours post-recruitment. We measured tryptophan metabolite concentrations and analysed these in the context of clinical data and disease severity indices, cytokine profiles and C-reactive protein (CRP) concentrations...
September 27, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27618652/neonatal-gut-microbiota-associates-with-childhood-multisensitized-atopy-and-t-cell-differentiation
#19
Kei E Fujimura, Alexandra R Sitarik, Suzanne Havstad, Din L Lin, Sophia Levan, Douglas Fadrosh, Ariane R Panzer, Brandon LaMere, Elze Rackaityte, Nicholas W Lukacs, Ganesa Wegienka, Homer A Boushey, Dennis R Ownby, Edward M Zoratti, Albert M Levin, Christine C Johnson, Susan V Lynch
Gut microbiota bacterial depletions and altered metabolic activity at 3 months are implicated in childhood atopy and asthma. We hypothesized that compositionally distinct human neonatal gut microbiota (NGM) exist, and are differentially related to relative risk (RR) of childhood atopy and asthma. Using stool samples (n = 298; aged 1-11 months) from a US birth cohort and 16S rRNA sequencing, neonates (median age, 35 d) were divisible into three microbiota composition states (NGM1-3). Each incurred a substantially different RR for multisensitized atopy at age 2 years and doctor-diagnosed asthma at age 4 years...
October 2016: Nature Medicine
https://www.readbyqxmd.com/read/27595600/regulated-endosomal-trafficking-of-diacylglycerol-lipase-alpha-dagl%C3%AE-generates-distinct-cellular-pools-implications-for-endocannabinoid-signaling
#20
Ya Zhou, Fiona V Howell, Oleg O Glebov, David Albrecht, Gareth Williams, Patrick Doherty
Diacylglycerol lipase alpha (DAGLα) generates the endocannabinoid (eCB) 2-arachidonylglycerol (2-AG) that regulates the proliferation and differentiation of neural stem cells and serves as a retrograde signaling lipid at synapses. Nothing is known about the dynamics of DAGLα expression in cells and this is important as it will govern where 2-AG can be made and released. We have developed a new construct to label DAGLα at the surface of live cells and follow its trafficking. In hippocampal neurons a cell surface pool of DAGLα co-localizes with Homer, a postsynaptic density marker...
October 2016: Molecular and Cellular Neurosciences
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