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https://www.readbyqxmd.com/read/29793178/nrf2-p-glycoprotein-axis-is-associated-with-clinicopathological-characteristics-in-colorectal-cancer
#1
Mohammad Reza Sadeghi, Farhad Jeddi, Narges Soozangar, Mohammad Hossein Somi, Masoud Shirmohamadi, Vahid Khaze, Nasser Samadi
Colorectal cancer (CRC) is the fourth leading cause of cancer-related death worldwide. Activation of ABCB1 gene and its main product, P-glycoprotein, is the common reason for chemoresistance. The nuclear factor-erythroid 2-related factor2 (Nrf2) is directly regulated by Kelch like ECH-associated protein1 (Keap1). In addition, Nrf2 is a key transcriptional factor that regulates efflux transporters, including P-gp. The aim of this study was to investigate the expression levels of Nrf2, Keap1 and ABCB1 in the biopsy samples and their association with clinicopathological features in CRC patients...
May 21, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29793153/effects-of-mg-2-on-recovery-of-nmda-receptors-from-inhibition-by-memantine-and-ketamine-reveal-properties-of-a-second-site
#2
Nathan G Glasgow, Madeleine R Wilcox, Jon W Johnson
Memantine and ketamine are NMDA receptor (NMDAR) open channel blockers that are thought to act via similar mechanisms at NMDARs, but exhibit divergent clinical effects. Both drugs act by entering open NMDARs and binding at a site deep within the ion channel (the deep site) at which the endogenous NMDAR channel blocker Mg2+ also binds. Under physiological conditions, Mg2+ increases the IC50 s of memantine and ketamine through competition for binding at the deep site. Memantine also can inhibit NMDARs after associating with a second site accessible in the absence of agonist, a process termed second site inhibition (SSI) that is not observed with ketamine...
May 12, 2018: Neuropharmacology
https://www.readbyqxmd.com/read/29793078/comparison-of-performance-based-assessment-and-real-world-skill-in-people-with-serious-mental-illness-ecological-validity-of-the-test-of-grocery-shopping-skills
#3
Laura A Faith, Melisa V Rempfer
Valid functional measures are essential for clinical and research efforts that address recovery and community functioning in people with serious mental illness. Although there is a great deal of interest in functional assessment, there is limited research supporting how well current evaluation methods provide a true assessment of real world functioning or naturalistic behavior. To address this gap in the literature, the present study examined the performance of individuals with serious mental illness (i.e., diagnosis of schizophrenia-spectrum, bipolar disorder, or other depression/anxiety diagnoses and accompanying functional disability) on the Test of Grocery Shopping Skills (TOGSS), a performance-based naturalistic task...
May 7, 2018: Psychiatry Research
https://www.readbyqxmd.com/read/29793062/functional-mri-of-brain-physiology-in-aging-and-neurodegenerative-diseases
#4
J Jean Chen
Brain aging and associated neurodegeneration constitute a major societal challenge as well as one for the neuroimaging community. A full understanding of the physiological mechanisms underlying neurodegeneration still eludes medical researchers, fuelling the development of in vivo neuroimaging markers. Hence it is increasingly recognized that our understanding of neurodegenerative processes likely will depend upon the available information provided by imaging techniques. At the same time, the imaging techniques are often developed in response to the desire to observe certain physiological processes...
May 21, 2018: NeuroImage
https://www.readbyqxmd.com/read/29792890/the-visual-cortex-and-visual-cognition-in-huntington-s-disease-an-overview-of-current-literature
#5
REVIEW
Emma M Coppen, Jeroen van der Grond, Ellen P Hart, Egbert A J F Lakke, Raymund A C Roos
The processing of visual stimuli from retina to higher cortical areas has been extensively studied in the human brain. In Huntington's disease (HD), an inherited neurodegenerative disorder, it is suggested that visual processing deficits are present in addition to more characteristic signs such as motor disturbances, cognitive dysfunction, and behavioral changes. Visual deficits are clinically important because they influence overall cognitive performance and have implications for daily functioning. The aim of this review is to summarize current literature on clinical visual deficits, visual cognitive impairment, and underlying visual cortical changes in HD patients...
May 21, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29792684/label-free-optical-marker-for-rbc-phenotyping-of-inherited-anaemias
#6
Martina Mugnano, Pasquale Memmolo, Lisa Miccio, Francesco Merola, Vittorio Bianco, Alessia Bramanti, Antonella Gambale, Roberta Russo, Immacolata Andolfo, Achille Iolascon, Pietro Ferraro
The gold standard methods for anaemia diagnosis are the complete blood count and the peripheral smear observation. However, they do not allow for a complete differential diagnosis, which requires biochemical assays, thus being label-dependent techniques. On the other hand, recent studies focus on label-free quantitative phase imaging (QPI) of blood samples to investigate blood diseases by using video-based morphological methods. However, when sick cells are very similar to healthy ones in terms of morphometric features identification of a blood disease becomes challenging even by morphometric as well as QPI...
May 24, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29792675/electron-phonon-coupling-and-resonant-relaxation-from-1d-and-1p-states-in-pbs-quantum-dots
#7
Eric R Kennehan, Grayson S Doucette, Ashley R Marshall, Christopher Grieco, Kyle T Munson, Matthew C Beard, John B Asbury
Observations of the hot-phonon bottleneck, which is predicted to slow the rate of hot carrier cooling in quantum confined nanocrystals, have been limited to date for reasons that are not fully understood. We used time-resolved infrared spectroscopy to directly measure higher energy intraband transitions in PbS colloidal quantum dots. Direct measurements of these intraband states permitted detailed analysis of the electronic overlap of the quantum confined states that may influence their relaxation processes...
May 24, 2018: ACS Nano
https://www.readbyqxmd.com/read/29792671/the-chemoattractant-glorin-is-inactivated-by-ester-cleavage-during-early-multicellular-development-of-polysphondylium-pallidum
#8
Daniel Heinrich, Robert Barnett, Luke Tweedy, Robert Insall, Pierre Stallforth, Thomas Winckler
Among the amoebozoan species capable of forming fruiting bodies, the dictyostelid social amoebae stand out since they form true multicellular organisms by means of single cell aggregation. Upon food depletion, cells migrate across gradients of extracellular signals initiated by cells in aggregation centers. The model species that is widely used to study multicellular development of social amoebae, Dictyostelium discoideum, uses cyclic adenosine monophosphate (cAMP) as a chemoattractant to coordinate aggregation...
May 24, 2018: ACS Chemical Biology
https://www.readbyqxmd.com/read/29792495/first-grade-classroom-level-adversity-associations-with-teaching-practices-academic-skills-and-executive-functioning
#9
Tashia Abry, Kristen L Granger, Crystal I Bryce, Michelle Taylor, Jodi Swanson, Robert H Bradley
Using data from the National Institute of Child Health and Human Development Study of Early Child Care and Youth Development and a model-building approach, the authors examined direct and indirect associations between first-grade (G1) classroom-level adversity (CLA), G1 teaching practices, and student (N = 1,073; M = 6.64 years; 49% girls; 82% White) academic skills and executive functioning in G1 and third grades (G3). Teachers reported the prevalence of adversity among their students (e.g., poor home/family life, poor academic/social readiness)...
May 24, 2018: School Psychology Quarterly
https://www.readbyqxmd.com/read/29792491/does-oral-language-underpin-the-development-of-later-behavior-problems-a-longitudinal-meta-analysis
#10
Jason C Chow, Erik Ekholm, Heather Coleman
OBJECTIVE: The purpose of this article is to estimate the overall weighted mean effect of the relation between early language skills and later behavior problems in school-aged children. METHOD: A systematic literature search yielded 19,790 unduplicated reports, and a structured search strategy and identification procedure yielded 25 unique data sets, with 114 effect sizes for analysis. Eligible reports were then coded, and effect sizes were extracted and synthesized via robust variance estimation and random-effects meta-analytic techniques...
May 24, 2018: School Psychology Quarterly
https://www.readbyqxmd.com/read/29792416/phosphotriesterase-magnetic-nanoparticles-bioconjugates-with-improved-enzyme-activity-in-a-biocatalytic-membrane-reactor
#11
Abaynesh Yihdego Gebreyohannes, Rosalinda Mazzei, Mohamed Yahia Marei Abdelrahim, Giuseppe Vitola, Elena Porzio, Giuseppe Manco, Mihail Barboiu, Lidietta Giorno
The need to find alternative bioremediation solutions for organophosphate degradation pushed the research to develop technologies based on organophosphate degrading enzymes, such as phosphotriesterase. The use of free phosphotriesterase poses limits in terms of enzyme reuse, stability and process development. The heterogenization of enzyme on a support and their use in bioreactors implemented by membrane seems a suitable strategy, thanks to the ability of membranes to compartmentalize, to govern mass transfer and provide microenvironment with tuned physico-chemical and structural properties...
May 24, 2018: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/29792254/introduction-of-new-theory-for-hand-hygiene-surveillance-healthcare-environment-theory
#12
Sharon Lea Kurtz
BACKGROUND AND PURPOSE: The purpose of this article is to introduce a theoretical foundation, the healthcare environment theory (HET), tested in a quantitative, cross-sectional, overt observational study measuring the association of demographic variables with consistent hand hygiene compliance of the ICU nurse. METHODS: Six environments found in a hospital ICU setting (family, church, work, administration, community, and culture) work bi-directionally to influence and be influenced by the nurse, simultaneously influencing each of the other environments in a multidirectional manner...
May 1, 2018: Research and Theory for Nursing Practice
https://www.readbyqxmd.com/read/29792248/metataxonomic-analysis-of-individuals-at-bmi-extremes-and-monozygotic-twins-discordant-for-bmi
#13
Casey T Finnicum, Stieneke Doornweerd, Conor V Dolan, Justin M Luningham, Jeffrey J Beck, Gonneke Willemsen, Erik A Ehli, Dorret I Boomsma, Richard G Ijzerman, Gareth E Davies, Eco J C de Geus
OBJECTIVE: The human gut microbiota has been demonstrated to be associated with a number of host phenotypes, including obesity and a number of obesity-associated phenotypes. This study is aimed at further understanding and describing the relationship between the gut microbiota and obesity-associated measurements obtained from human participants. SUBJECTS/METHODS: Here, we utilize genetically informative study designs, including a four-corners design (extremes of genetic risk for BMI and of observed BMI; N = 50) and the BMI monozygotic (MZ) discordant twin pair design (N = 30), in order to help delineate the role of host genetics and the gut microbiota in the development of obesity...
June 2018: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/29792122/drug-cost-avoidance-in-clinical-trials-of-breast-cancer
#14
M Mañes-Sevilla, R Romero-Jiménez, A Herranz-Alonso, M Sánchez-Fresneda, E Gonzalez-Haba, R Collado-Borrel, J Benedi-González, M Sanjurjo-Sáez
Background The objectives of this study were to determine if clinical trials in breast cancer, with an investigational drug, created direct drug cost savings for the healthcare system related to cost avoidance of the best standard of care treatments used in these studies. The aim was to quantify this potential drug cost avoidance. Methods We conducted a retrospective observational study of the drug cost avoidance during the study period (2014-2016). We included clinical trials with investigational drug, managed by pharmacy department and provided by the sponsor...
January 1, 2018: Journal of Oncology Pharmacy Practice
https://www.readbyqxmd.com/read/29792056/placenta-in-intrauterine-fetal-demise-iufd-a-comprehensive-study-from-a-tertiary-care-hospital
#15
Anisha Manocha, Gayatri Ravikumar, Julian Crasta
BACKGROUND: Intrauterine fetal demise (IUFD) is an unpredictable and challenging obstetric complication. Its etiology is multifactorial with more than 60% attributed to the placental cause. The present study was done with a primary objective of understanding the placental lesions underlying IUFD. METHODS: In this retrospective observational study, IUFD cases (> 22 weeks) between January 2012-September 2015 were collected from pathology database. The clinical details with ultrasound findings were collected from mother's charts...
May 23, 2018: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29792031/the-composition-in-the-interface-between-clay-mineral-surfaces-and-divalent-cation-electrolytes
#16
Stanislav Jelavić, A Rath Nielsen, S L S Stipp, N Bovet
The interfacial free energy of a solid, which determines its adsorption properties, depends on interactions between the surface and the fluid. A change in surface composition can completely change the behaviour of the solid. Decades of work have explored adsorption and its effects at solid-fluid interfaces from the macroscopic perspective and using molecular modelling so the concept of the electric double layer (EDL) is well established in the community. However, direct, molecular level, experimental observations of the composition within the interface region, and its change with time and conditions, is not abundant...
May 23, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29791653/waist-circumference-is-an-effect-modifier-of-the-association-between-bone-mineral-density-and-glucose-metabolism
#17
Lygia N Barroso, Dayana R Farias, Marcia Soares-Mota, Heloisa Bettiol, Marco Antônio Barbieri, Milton Cesar Foss, Antônio Augusto M da Silva, Gilberto Kac
OBJECTIVE: The role of bone markers on insulin resistance (IR) remains controversial. The objective of this study is to evaluate the association between bone mineral density (BMD) and glucose metabolism and investigate if visceral hyperadiposity, evaluated by waist circumference (WC), is an effect modifier of this association. SUBJECTS AND METHODS: Cross-sectional analysis with 468 young adults from the fourth follow-up of the 1978/79 Ribeirão Preto prospective birth cohort, Brazil...
May 17, 2018: Archives of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29791412/shock-wave-imaging-by-density-recovery-from-intensity-measurements
#18
Biswajit Medhi, Gopalakrishna M Hegde, Kalidevapura Jagannath Reddy, Debasish Roy, Ram Mohan Vasu
A method for quantitative estimation of density variation in high-speed flow, which uses light as an interrogating tool, is described. The wavefront distortion of the interrogating beam induced by the compressible flow field is estimated quantitatively, in which the density gradient of the flow field is seen as refractive-index gradient by the probing beam. The distorted wavefront is measured quantitatively by using the cross-sectional intensities of the distorted wavefront along the optical axis. Iterative algorithms are developed using both deterministic (Gauss-Newton) and stochastic (ensemble Kalman filter) update strategies to recover unknown parameters such as the phase of the wavefront or the refractive index distribution in the flow directly from the measured intensities...
May 20, 2018: Applied Optics
https://www.readbyqxmd.com/read/29791327/signature-of-phase-singularities-in-diffusive-regimes-in-disordered-waveguide-lattices-interplay-and-qualitative-analysis
#19
Somnath Ghosh
Coexistence and interplay between mesoscopic light dynamics with singular optics in spatially disordered waveguide lattices are reported. Two CW light beams of a 1.55 μm operating wavelength are launched as inputs to 1D waveguide lattices with controllable weak disorder in a complex refractive index profile. Direct observation of phase singularities in the speckle pattern along the length is numerically demonstrated. Quantitative analysis of the onset of such singular behavior and diffusive wave propagation is analyzed for the first time, to the best of our knowledge...
May 10, 2018: Applied Optics
https://www.readbyqxmd.com/read/29791059/the-use-of-high-resolution-colonic-manometry-to-establish-etiology-and-direct-treatment-in-patients-with-constipation-case-series-with-correlation-to-histology
#20
Yuwei Li, Jiying Cong, Fei Fei, Zhao Zhang, Yongjun Yu, Chen Xu, Xipeng Zhang, Shiwu Zhang
BACKGROUND AND AIM: Different clinical treatments are available to treat patients with constipation. We aimed to study the etiology and direct treatment in a case series of patients with constipation by the use of high-resolution colonic manometry (HRCM). METHODS: HRCM was used to record the colorectal peristaltic contractions of the entire colon in patients. Based on the results of HRCM, 151 patients with constipation were classified into groups and received different clinical treatment such as a total or subtotal colectomy, local excision, or conservative treatment...
May 23, 2018: Journal of Gastroenterology and Hepatology
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