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Nancy Wang, Matthias Osswald
The majority of meningiomas, the most common primary brain tumor, are considered to be benign, and characteristic magnetic resonance imaging features allow a preliminary diagnosis. Meningiomas can be classified in the World Health Organization system as grade I, II, or III, depending on various histological features. In many cases, observation is the preferred management option, although this means the absence of a histological diagnosis. If necessary, standard therapy consists of surgery with or without adjuvant radiation, depending on the tumor grade and the degree of resection...
February 2018: Seminars in Neurology
Kristen Healy
The goal of this study was to evaluate the use of stable isotope labeled compounds to better understand factors influencing energy turnover in larval Culex quinquefasciatus (Say; Diptera: Culicidae). Three isotope labeled compounds were evaluated in this study, including 15N-labeled potassium nitrate, 13C-labeled glucose, and 13C-labeled leucine. Conditions were first optimized in the laboratory to determine the most appropriate concentration of isotope, as well as the half-life of enrichment. Once optimum conditions were established we used standard equations to predict and determine temperature and density-dependent energy turnover rates...
March 14, 2018: Journal of Medical Entomology
Shiqi Luo, Feng He, Junjie Luo, Shengqian Dou, Yirong Wang, Annan Guo, Jian Lu
Transfer RNA-derived small RNAs (tsRNAs) are an emerging class of small RNAs, yet their regulatory roles have not been well understood. Here we studied the molecular mechanisms and consequences of tsRNA-mediated regulation in Drosophila. By analyzing 495 public small RNA libraries, we demonstrate that most tsRNAs are conserved, prevalent and abundant in Drosophila. By carrying out mRNA sequencing and ribosome profiling of S2 cells transfected with single-stranded tsRNA mimics and mocks, we show that tsRNAs recognize target mRNAs through conserved complementary sequence matching and suppress target genes by translational inhibition...
March 14, 2018: Nucleic Acids Research
Anna M Hammersmith
Purpose: Parents' and children's lives are interwoven over the life course. Parents' positivity and negativity toward children relate to children's and parents' transitions, although the nature of this relationship is unclear. This study investigated the extent to which transitions-like those tied to residence, unions, employment, parenthood, and health-related to parents' positivity and negativity. Method: This study used the Health and Retirement Study's Psychosocial Survey from 2006 and 2010 to examine how parents' and children's transitions related to parents' positivity and negativity toward children...
March 14, 2018: Gerontologist
Carla T Murray, Matthew Schmit
Introduction: We estimate the effect on health care spending of an option to change TRICARE. Under the option, which is based on a proposal made by the Military Compensation and Retirement Modernization Commission (MCRMC), most beneficiaries could choose from a range of commercial health networks instead of the current TRICARE plans. Military treatment facilities would become network providers under the commercial plans. Materials and Methods: We used data from the Department of Defense (DoD) to estimate the cost of providing the current health care benefit to working-age retirees and their dependents and survivors, and active duty family members...
March 14, 2018: Military Medicine
Nathan H Johnson, Carol Vidal, Flavius R W Lilly
Background: Current prevalence estimates are 15% for depression and 20% for anxiety disorders among college students. These disorders are known to negatively impact academic achievement and persistence. It is important to understand the effects of parental military service on the mental health of children across development. The purpose of this study is to examine the influence of being raised in a military household on current and historical depression and anxiety disorders among college students...
March 14, 2018: Military Medicine
Farnaz Foolad, Brandie D Taylor, Samuel A Shelburne, Cesar A Arias, Samuel L Aitken
VRE are associated with ∼1300 deaths per year in the USA. Recent literature suggests that daptomycin, a cyclic lipopeptide antibiotic with concentration-dependent bactericidal activity, is the preferred treatment option for VRE bacteraemia, yet the optimal dosing strategy for this indication has not been established. In vitro evidence suggests that higher-than-labelled doses of daptomycin are required to optimally treat VRE bacteraemia and to inhibit the development of resistance. However, concern of dose-dependent toxicities, notably increases in creatine phosphokinase and the development of rhabdomyolysis, are a barrier to initiating high-dose schemes in clinical practice...
March 13, 2018: Journal of Antimicrobial Chemotherapy
Francesca Micoli, Paolo Costantino, Roberto Adamo
Cell surface carbohydrates have been proven optimal targets for vaccine development. Conjugation of polysaccharides to a carrier protein triggers a T-cell dependent immune response to the glycan moiety. Licensed glycoconjugate vaccines are produced by chemical conjugation of capsular polysaccharides to prevent meningitis caused by meningococcus, pneumococcus and Haemophilus influenzae type b. However, other classes of carbohydrates (O-antigens, exopolysaccharides, wall/teichoic acids) represent attractive targets for developing vaccines...
March 14, 2018: FEMS Microbiology Reviews
Krystin A Engelhardt, Elizabeth Hisle-Gorman, Gregory H Gorman, Nicole R Dobson
Background: The Military Health System (MHS) provides universal access to medical care to active duty service members, retirees, and their dependents. Observational data from small studies suggest lower preterm birth rates in the MHS compared with U.S. national averages. The objectives of this study are to determine the rate of preterm birth in the MHS from 2006 to 2012 compared with national rates and to analyze the impact of demographic factors on preterm birth in a universal access health care system...
March 14, 2018: Military Medicine
Jason El Brihi, Rob Horne, Kate Faasse
Background: Recent evidence indicates that placebo effects can occur even when patients know that they are taking a placebo, termed the open-label placebo effect. Aim: To assess whether placebo dose (one pill per day vs. four pills per day), treatment expectancies, and adherence contribute to open-label placebo effects. Method: Healthy undergraduate participants were randomly assigned to take one or four open-label placebo pills per day or to a no-treatment control group...
March 14, 2018: Annals of Behavioral Medicine: a Publication of the Society of Behavioral Medicine
Bertine de Vries, Jooske T van Busschbach, Elisabeth C D van der Stouwe, André Aleman, Jan J M van Dijk, Paul H Lysaker, Johan Arends, Saskia A Nijman, Gerdina H M Pijnenborg
Psychotic disorders often have been linked with violence. However, studies have shown that people with a psychotic disorder are more often victim than perpetrator of violence. The objective of this meta-analysis was to review prevalence rates for different types of victimization and to identify risk factors associated with victimization. Based on a search in MEDLINE, PsycINFO, and Web of Science, 27 studies were found with samples consisting of adults with a psychotic disorder and possible victimization occurring during adulthood and data on "violent victimization," "sexual victimization," "non-violent victimization," and/or "victimization not otherwise specified...
March 14, 2018: Schizophrenia Bulletin
Samuel J Watson, Robert G Sowden, Paul Jarvis
The chloroplast houses photosynthesis in all green plants, and is therefore of fundamental importance to the viability and productivity of plants, ecosystems, and agriculture. Chloroplasts are, however, extremely vulnerable to environmental stress, on account of the inherent volatility of oxygenic photosynthesis. To counteract this sensitivity, sophisticated systems of chloroplast stress acclimation have evolved, and many of these involve broad proteome changes. Here, we provide an overview of the interlocking and mutually dependent mechanisms of abiotic stress-induced chloroplast proteome remodelling...
March 14, 2018: Journal of Experimental Botany
Olivier Barbier, Maelle Racle
Introduction: The current evolution of surgical practices is increasingly trending toward hyper-specialization. For military surgeons, their practice in France does not differ from their civilian counterparts. In contrast, in external operations, they have to deal with specific war injuries in austere conditions. They are also required to take care of local populations. Therefore, specific training is necessary, and the French Military Health Service Academy (Ecole du Val-de-Grâce) Paris has set up a specific training called Advanced Course for Deployment Surgery (ACDS) in 2007...
March 14, 2018: Military Medicine
Flavio Pereira, Roger de Moraes, Diogo Van Bavel, Andrea De Lorenzo, Eduardo Tibirica
Introduction: The main aim of the present study is to evaluate the effects of strenuous exercise, related to special military training for riot control, on systemic microvascular endothelial function and skin capillary density. Materials and Methods: Endothelium-dependent microvascular reactivity was evaluated in the forearm skin of healthy military trainees (age 23.4 ± 2.3 yr; n = 15) using laser speckle contrast imaging coupled with cutaneous acetylcholine (ACh) iontophoresis and post-occlusive reactive hyperemia (PORH)...
March 14, 2018: Military Medicine
Yilun Deng, Yuejuan Qin, Subramanya Srikantan, Anqi Luo, Zi-Ming Cheng, Shahida K Flores, Kris S Vogel, Exing Wang, Patricia L M Dahia
The TMEM127 tumor suppressor gene encodes a transmembrane protein of unknown function mutated in pheochromocytomas and, rarely, in renal cancers. Tumors with inactivating TMEM127 mutations have increased mTORC1 signaling by undefined mechanisms. Here we report that TMEM127 interacts with the lysosome-anchored complex comprised of Rag GTPases, the LAMTOR pentamer (or 'ragulator') and vATPase, which controls amino acid-mediated mTORC1 activation. We found that in nutrient-rich conditions TMEM127 expression reduces mTORC1 recruitment to Rags...
March 14, 2018: Human Molecular Genetics
Saeideh Tasharrofi, Hossein Taghdisian, Abdollah Golchoobi
In this study, pure and ternary adsorption of hydrogen sulfide (H2 S), ethylbenzene (EB), and carbon monoxide (CO) on different arrays of zigzag double wall carbon nanotube was investigated using grand canonical Monte Carlo simulations. The internal diameters of nanotube were fixed at 2r = 50.17 Å while nanotube wall distances were different values from d = 0 Å to d = 150 Å. Pure simulation results indicated that adsorption quantity of H2 S and EB in low pressure ranges of P = 1.9 bar to P = 3...
March 2, 2018: Journal of Molecular Graphics & Modelling
Suzanne Grant, Bruce Guthrie
Patient safety is an increasing concern for health systems internationally. The majority of administrative work in UK general practice takes place in the context of organisational routines such as repeat prescribing and test results handling, where high workloads and increased clinician dependency on administrative staff have been identified as an emerging safety issue. Despite this trend, most research to date has focused on the redistribution of the clinical workload between doctors, nurses and allied health professionals within individual care settings...
March 2, 2018: Social Science & Medicine
Xuan Shi, Huu Hao Ngo, Langtao Sang, Pengkang Jin, Xiaochang C Wang, Guanghua Wang
In this study, a pilot combined sewer system was constructed to characterize the pollutant transformation in sewer sediment. The results showed that particulate contaminants deposited from sewage could be transformed into dissolved matter by distinct pollutant transformation pathways. Although the oxidation-reduction potential (ORP) was varied from -80 mV to -340 mV in different region of the sediment, the fermentation was the dominant process in all regions of the sediment, which induced hydrolysis and decomposition of particulate contaminants...
March 13, 2018: Environmental Pollution
Luís M Félix, Ana M Vidal, Cindy Serafim, Ana M Valentim, Luís M Antunes, Sandra M Monteiro, Manuela Matos, Ana M Coimbra
Ketamine is a widely used pharmaceutical that has been detected in water sources worldwide. Zebrafish embryos were used in this study to investigate the oxidative stress and apoptotic signals following a 24h exposure to different ketamine concentrations (0, 50, 70 and 90 mg L-1 ). Early blastula embryos (∼2 h post fertilisation-hpf) were exposed for 24 h and analysed at 8 and 26 hpf. Reactive oxygen species and apoptotic cells were identified in vivo, at 26 hpf. Enzymatic activities (superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), lactate dehydrogenase (LDH) and acetylcholinesterase (AChE)), glutathione levels (oxidised (GSSG) and reduced (GSH)), oxidative damage (lipid peroxidation (LPO) and protein carbonyls (CO)) as well as oxidative stress (gclc, gstp1, sod1 and cat), apoptosis (casp3a, casp6, casp8, casp9, aifm1 and tp53) and cell proliferation (pcna) related-genes were evaluated at 8 and 26 hpf...
March 7, 2018: Chemosphere
Kristin L Szuhany, Danny MacKenzie, Michael W Otto
BACKGROUND AND OBJECTIVES: The impaired ability to delay rewards, delay discounting (DD), is associated with several problematic conditions in which impulsive decision-making derails long-term goals. Working memory (WM), the ability to actively store and manipulate information, is associated with DD. The purpose of this study was to examine the effect of cognitive priming on DD and to identify moderation of this effect dependent on degree of WM capacity (WMC) and depressed mood. METHODS: A WM task (n-back) was used as a cognitive prime before assessment of DD (Monetary Choice Questionnaire) and was compared to a similar prime from an inhibition task in a factorial design in 183 community participants...
March 7, 2018: Journal of Behavior Therapy and Experimental Psychiatry
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