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https://www.readbyqxmd.com/read/28434110/the-risk-of-radiation-necrosis-following-stereotactic-radiosurgery-with-concurrent-systemic-therapies
#1
Joseph M Kim, Jacob A Miller, Rupesh Kotecha, Roy Xiao, Aditya Juloori, Matthew C Ward, Manmeet S Ahluwalia, Alireza M Mohammadi, David M Peereboom, Erin S Murphy, John H Suh, Gene H Barnett, Michael A Vogelbaum, Lilyana Angelov, Glen H Stevens, Samuel T Chao
To investigate late toxicity among patients with newly-diagnosed brain metastases undergoing stereotactic radiosurgery (SRS) with concurrent systemic therapies with or without whole-brain radiation therapy (WBRT). Patients with newly-diagnosed brain metastasis who underwent SRS at a single tertiary-care institution from 1997 to 2015 were eligible for inclusion. The class and timing of all systemic therapies were collected for each patient. The primary outcome was the cumulative incidence of radiographic radiation necrosis (RN)...
April 22, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28433649/chronic-nicotine-attenuates-behavioral-and-synaptic-plasticity-impairments-in-a-streptozotocin-model-of-alzheimer-s-disease
#2
Esteves Im, Lopes-Aguiar C, Rossignoli Mt, Ruggiero Rn, Broggini Acs, Bueno-Junior Ls, Kandratavicius L, Monteiro Mr, Romcy-Pereira Rn, Leite Jp
Brain glucose metabolism is altered in sporadic Alzheimer's disease (sAD), whose pathologies are reproduced in rodents by intracerebroventricular (icv) infusion of streptozotocin (STZ) in subdiabetogenic doses. The icv-STZ model also culminates in central cholinergic dysfunctions, which in turn are known to underlie both the sAD cognitive decline, and synaptic plasticity impairments. Considering the cognitive-enhancing potential of chronic nicotine (Nic), we investigated whether it attenuates icv-STZ-induced impairments in recognition memory and synaptic plasticity in a cognition-relevant substrate: the hippocampal CA1-medial prefrontal cortex (mPFC) pathway...
April 19, 2017: Neuroscience
https://www.readbyqxmd.com/read/28426983/constraining-the-temporal-variations-of-ra-isotopes-and-rn-in-the-groundwater-end-member-implications-for-derived-sgd-estimates
#3
Marc Cerdà-Domènech, Valentí Rodellas, Albert Folch, Jordi Garcia-Orellana
Submarine groundwater discharge (SGD) has been recognized as an important supplier of chemical compounds to the ocean that may influence coastal geochemical cycles. Radium isotopes ((223)Ra, (224)Ra, (226)Ra,(228)Ra) and radon ((222)Rn) have been widely applied as tracers of SGD. Their application requires the appropriate characterization of both the concentrations of tracers in the discharging groundwater and their distribution in the coastal water column. This study evaluates the temporal evolution of Ra isotopes and (222)Rn concentrations in a dynamic subterranean estuary of a microtidal Mediterranean coastal aquifer that experiences large displacements of the fresh-saltwater interface as a necessary initial step in evaluating the influence of SGD in coastal waters...
April 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28425714/prehydrated-one-electron-attachment-to-azido-modified-pentafuranoses-aminyl-radical-formation-rapid-h-atom-transfer-and-subsequent-ring-opening
#4
Mukesh Mudgal, Sunny Rishi, Daniel A Lumpuy, Keaton A Curran, Kathryn Lynn Verley, Adam J Sobczak, Thao P Dang, Natasha Sulimoff, Anil Kumar, Michael D Sevilla, Stanislaw F Wnuk, Amitava Adhikary
Methyl 2-azido-2-deoxy-α-D-lyxofuranoside (1a) and methyl 2-azido-2-deoxy-β-D-ribofuranoside (2) were prepared from D-xylose or D-arabinose, respectively. Employing ESR and DFT/B3LYP/6-31G* calculations, we investigated (i) aminyl radical (RNH•) formation and (ii) reaction pathways of RNH•. Prehydrated electron attachment to 1a and 2 at 77 K produced transient azide anion radical (RN3•¯) which reacts via rapid N2 loss at 77 K, forming nitrene anion radical (RN•¯). Rapid protonation of RN•¯ at 77 K formed RNH• and ¯OH...
April 20, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28425047/can-anti-vascular-endothelial-growth-factor-antibody-reverse-radiation-necrosis-a-preclinical-investigation
#5
Chong Duan, Carlos J Perez-Torres, Liya Yuan, John A Engelbach, Scott C Beeman, Christina I Tsien, Keith M Rich, Robert E Schmidt, Joseph J H Ackerman, Joel R Garbow
Anti-vascular endothelial growth factor (anti-VEGF) antibodies are a promising new treatment for late time-to-onset radiation-induced necrosis (RN). We sought to evaluate and validate the response to anti-VEGF antibody in a mouse model of RN. Mice were irradiated with the Leksell Gamma Knife Perfexion™ and then treated with anti-VEGF antibody, beginning at post-irradiation (PIR) week 8. RN progression was monitored via anatomic and diffusion MRI from weeks 4-12 PIR. Standard histology, using haematoxylin and eosin (H&E), and immunohistochemistry staining were used to validate the response to treatment...
April 19, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28423279/ngmcp-noble-gas-bound-half-sandwich-complexes-ng-he-rn-m-be-ba-cp-%C3%AE-5-c5h5
#6
Ranajit Saha, Sudip Pan, Pratim Kumar Chattaraj
Structures, bonding and stability half-sandwich complexes with general formula, NgMCp+ (Ng = He-Rn, M = Be-Ba, Cp = 5-C5H5) are analyzed through ab initio computation. MCp+ complexes possess remarkable Ng binding ability, particularly for M = Be and Mg. While for Ar-Rn bound analogues the bond dissociation energy in the former complex ranges within 17.5-28.0 kcal mol-1, it becomes 10.4-18.7 kcal mol-1 in the latter complex. In fact, BeCp+ is able to form strong bond with the two most inert elements, He and Ne...
April 19, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28417341/external-validation-of-a-nomogram-including-the-computed-tomography-imaging-score-to-predict-indolent-renal-masses
#7
X Chen, B Wan, D Yang, H Zhao, W Tan
PURPOSE: To assess a nomogram including the computed tomography (CT) score and body mass index (BMI) that was constructed to predict indolent diseases in a cohort of patients with renal masses. MATERIALS AND METHODS: The data collected from patients undergoing partial nephrectomy (PN) or radical nephrectomy (RN) between January 2012 and September 2016 were analyzed. Two urologic surgeons and a radiologist reviewed the images to determine the CT score. Postoperative pathological assessment was performed to categorize renal masses as either indolent or aggressive...
April 17, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/28411917/comparative-effectiveness-of-surgical-treatments-for-small-renal-masses
#8
REVIEW
Shree Agrawal, Hillary Sedlacek, Simon P Kim
In the management of small renal masses (SRMs), treatment options include partial nephrectomy (PN), radical nephrectomy (RN), ablation, renal biopsy, and active surveillance. Large series retrospective and meta-analyses demonstrate PN may confer greater preservation of renal function, overall survival, and equivalent cancer control when compared with RN. As newer therapies emerge, we should critically evaluate the risks and benefits associated with the surgical management of SRMs among patients with competing comorbidities, complex tumors, and high-risk disease...
May 2017: Urologic Clinics of North America
https://www.readbyqxmd.com/read/28411594/qed-effects-in-1s-and-2s-single-and-double-ionization-potentials-of-the-noble-gases
#9
J Niskanen, K Jänkälä, M Huttula, A Föhlisch
We present calculations on the quantum electrodynamics (QED) effects in 1s and 2s single and double ionization potentials of noble gases from Ne to Rn as perturbations on relativistic four-component Dirac-Fock wavefunctions. The most dominant effect originates from the self-energy of the core-electron that yields corrections of similar order as the transverse interaction. For 1s ionization potentials, a match within few eV against the known experimental values is obtained, and our work reveals considerable QED effects in the photoelectron binding energies across the periodic table-most strikingly even for Ne...
April 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28411426/thoron-mitigation-system-based-on-charcoal-bed-for-applications-in-thorium-fuel-cycle-facilities-part-2-development-characterization-and-performance-evaluation
#10
K Sudeep Kumara, B K Sahoo, J J Gaware, B K Sapra, Y S Mayya, N Karunakara
Exposure due to thoron ((220)Rn) gas and its decay products in a thorium fuel cycle facility handling thorium or (232)U/(233)U mixture compounds is an important issue of radiological concern requiring control and mitigation. Adsorption in a flow-through charcoal bed offers an excellent method of alleviating the release of (220)Rn into occupational and public domain. In this paper, we present the design, development, and characterization of a Thoron Mitigation System (TMS) for industrial application. Systematic experiments were conducted in the TMS for examining the (220)Rn mitigation characteristics with respect to a host of parameters such as flow rate, pressure drop, charcoal grain size, charcoal mass and bed depth, water content, and heat of the carrier gas...
April 12, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28411425/thoron-mitigation-system-based-on-charcoal-bed-for-applications-in-thorium-fuel-cycle-facilities-part-1-development-of-theoretical-models-for-design-considerations
#11
B K Sahoo, K Sudeep Kumara, N Karunakara, J J Gaware, B K Sapra, Y S Mayya
Regulating the environmental discharge of (220)Rn (historically known as thoron) and its decay products from thorium processing facilities is important for protection of environment and general public living in the vicinities. Activated charcoal provides an effective solution to this problem because of its high adsorption capacity to gaseous element like radon. In order to design and develop a charcoal based Thoron Mitigation System, a mathematical model has been developed in the present work for studying the (220)Rn transport and adsorption in a flow through charcoal bed and estimating the (220)Rn mitigation factor (MF) as a function of system and operating parameters...
April 12, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28411298/detecting-sepsis-are-two-opinions-better-than-one
#12
Poushali Bhattacharjee, Matthew M Churpek, Ashley Snyder, Michael D Howell, Dana P Edelson
The diagnosis of sepsis requires that objective criteria be met with a corresponding subjective suspicion of infection. We conducted a study to characterize the agreement between different providers' suspicion of infection and the correlation with patient outcomes using prospective data from a general medicine ward. Registered nurse (RN) suspicion of infection was collected every 12 hours and compared with medical doctor or advanced practice professional (MD/APP) suspicion, defined as an existing order for antibiotics or a new order for blood or urine cultures within the 12 hours before nursing screen time...
April 2017: Journal of Hospital Medicine: An Official Publication of the Society of Hospital Medicine
https://www.readbyqxmd.com/read/28405509/improved-time-to-disease-progression-in-the-brain-in-patients-with-melanoma-brain-metastases-treated-with-concurrent-delivery-of-radiosurgery-and-ipilimumab
#13
Tijana Skrepnik, Srinath Sundararajan, Haiyan Cui, Baldassarre Stea
Background: To identify the optimal sequencing and timing of immunotherapy (IT) and stereotactic radiosurgery (SRS) for melanoma brain metastases (MBMs). Methods: The elapsed days between IT and SRS were correlated with local control (LC), regional brain control (RBC), time to CNS progression (TTPCNS), overall survival (OS), and radiation necrosis (RN). Logistic regression and Cox proportional models were used for statistical analysis. Results: Twenty-five patients with 58 MBMs underwent SRS and IT. Median follow-up was 22...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28403834/genome-wide-comparative-analysis-of-nbs-encoding-genes-in-four-gossypium-species
#14
COMPARATIVE STUDY
Liuxin Xiang, Jinggao Liu, Chaofeng Wu, Yushan Deng, Chaowei Cai, Xiao Zhang, Yingfan Cai
BACKGROUND: Nucleotide binding site (NBS) genes encode a large family of disease resistance (R) proteins in plants. The availability of genomic data of the two diploid cotton species, Gossypium arboreum and Gossypium raimondii, and the two allotetraploid cotton species, Gossypium hirsutum (TM-1) and Gossypium barbadense allow for a more comprehensive and systematic comparative study of NBS-encoding genes to elucidate the mechanisms of cotton disease resistance. RESULTS: Based on the genome assembly data, 246, 365, 588 and 682 NBS-encoding genes were identified in G...
April 12, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28397298/micromorphological-differences-of-the-implant-abutment-junction-and-in%C3%A2-vitro-load-testing-for-three-different-titanium-abutments-on-straumann-tissue-level-implants
#15
N Mattheos, C Larsson, L Ma, G Fokas, V Chronopoulos, M Janda
BACKGROUND: The aim of this study was to investigate the micromorphological differences among three commercially available titanium abutments on Straumann implants. Furthermore, the possible impact of functional loading on the micromorphology and potential complications was investigated with the use of in vitro testing. MATERIAL AND METHODS: Three groups of Titanium abutments (A: Straumann Variobase n = 5, B: EBI best Duo n = 5, and C: Implant Direct n = 5) were torqued on Straumann RN implants, as according to each of the manufacturer's instructions...
April 11, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/28394894/tissue-specific-enhancer-repression-through-molecular-integration-of-cell-signaling-inputs
#16
Luis Humberto Mojica-Vázquez, Mikhail H Benetah, Aissette Baanannou, Sandra Bernat-Fabre, Bart Deplancke, David L Cribbs, Henri-Marc Bourbon, Muriel Boube
Drosophila leg morphogenesis occurs under the control of a relatively well-known genetic cascade, which mobilizes both cell signaling pathways and tissue-specific transcription factors. However, their cross-regulatory interactions, deployed to refine leg patterning, remain poorly characterized at the gene expression level. Within the genetically interacting landscape that governs limb development, the bric-à-brac2 (bab2) gene is required for distal leg segmentation. We have previously shown that the Distal-less (Dll) homeodomain and Rotund (Rn) zinc-finger activating transcription factors control limb-specific bab2 expression by binding directly a single critical leg/antennal enhancer (LAE) within the bric-à-brac locus...
April 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28391867/ultrasensitive-immunoassay-for-monocrotaline-using-monoclonal-antibody-produced-by-n-n-carbonyldiimidazole-mediated-hapten-carrier-protein-conjugates
#17
Seiichi Sakamoto, Rika Nagamitsu, Gorawit Yusakul, Tomofumi Miyamoto, Hiroyuki Tanaka, Satoshi Morimoto
Monocrotaline (MCT) is a naturally occurring pyrrolizidine alkaloid mainly produced in plant genus Crotalaria (Fabaceae), in which various toxicities have been reported. Recently, demand of quantitative analysis for determination/detection of MCT has increased because MCT in plants can be transferred to human by food chain, leading to intoxication. In this study, monoclonal antibody (MAb) against MCT (MAb 4B8) was produced by unique one-pot conjugation between hydrolysate of MCT, retronecine (RN) and consecutive lysine residues of bovine-serum albumin (BSA) through N,N'-carbonyldiimidazole (CDI) mediated method...
June 1, 2017: Talanta
https://www.readbyqxmd.com/read/28390995/half-life-measurement-of-212-pb-by-means-of-a-liquid-scintillator-based-220-rn-trap
#18
Karsten Kossert
A beaker was filled with a liquid mineral oil scintillator to catch (220)Rn from a (228)Th source. The liquid scintillator was then transferred to a polyethylene vial which was measured in a custom-built triple-to-double coincidence ratio (TDCR) counter. The measurements were used to determine the (212)Pb half-life which was found to be 10.622(7) hours.
April 3, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28390180/valve-mediated-hemodynamics-and-their-association-with-distal-ascending-aortic-diameter-in-bicuspid-aortic-valve-subjects
#19
Vrishank Raghav, Alex J Barker, Daniel Mangiameli, Lucia Mirabella, Michael Markl, Ajit P Yoganathan
PURPOSE: Valve mediated hemodynamics have been postulated to contribute to pathology of the ascending aorta (AAo). The objective of this study is to assess the association of aortic valve morphology and hemodynamics with downstream AAo size in subjects with bicuspid aortic valve (BAV) disease. MATERIALS AND METHODS: Four-dimensional flow MRI at 1.5 or 3 Tesla was used to evaluate the hemodynamics in the proximal AAo of 52 subjects: size-matched controls with tricuspid aortic valves (n = 24, mid ascending aorta [MAA] diameter = 38...
April 8, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28383746/examination-of-lesbian-gay-bisexual-and-transgender-health-care-content-in-north-carolina-schools-of-nursing
#20
Judith B Cornelius, Ijeoma Enweana, Celeste Kaysha Alston, Dee M Baldwin
BACKGROUND: Nursing students require academic and clinical training in preparation for the increased demand for culturally competent care. One group that is in need of culturally knowledgeable health care providers is lesbian, gay, bisexual, and transgender (LGBT) individuals. The purpose of this study was to examine how LGBT health care content is integrated into North Carolina schools of nursing curricula and to examine the existence of specific LGBT policies. METHOD: A survey was mailed to 70 deans and directors of RN programs in North Carolina...
April 1, 2017: Journal of Nursing Education
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