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https://www.readbyqxmd.com/read/29471549/glutamate-dehydrogenase-deficient-mice-display-schizophrenia-like-behavioral-abnormalities-and-ca1-specific-hippocampal-dysfunction
#1
Sharon S Lander, Usman Khan, Nicole Lewandowski, Darpan Chakraborty, Frank A Provenzano, Susana Mingote, Sergiy Chornyy, Francesca Frigerio, Pierre Maechler, Hanoch Kaphzan, Scott A Small, Stephen Rayport, Inna Gaisler-Salomon
Brain imaging has revealed that the CA1 subregion of the hippocampus is hyperactive in prodromal and diagnosed patients with schizophrenia (SCZ), and that glutamate is a driver of this hyperactivity. Strikingly, mice deficient in the glutamate synthetic enzyme glutaminase have CA1 hypoactivity and a SCZ-resilience profile, implicating glutamate-metabolizing enzymes. To address this further, we examined mice with a brain-wide deficit in the glutamate-metabolizing enzyme glutamate dehydrogenase (GDH), encoded by Glud1, which should lead to glutamate excess due to reduced glutamate metabolism in astrocytes...
February 20, 2018: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/29471534/cypermethrin-promotes-lung-cancer-metastasis-via-modulation-of-macrophage-polarization-by-targeting-microrna-155-bcl6
#2
Fang Huang, Zhifeng Chen, Hanwen Chen, Wei Lu, Shujun Xie, Qing H Meng, Yihua Wu, Dajing Xia
Cypermethrin (CYM), a type II pyrethroid, is widely used as an insecticide for agriculture and household. Cumulative evidence indicates that acute and chronic exposure to CYM might cause a number of health problems, such as cancer and neuronal system diseases. However, the molecular mechanism underlying this pathology is not known. The main objective of our study was to define the effects of CYM on macrophages and the implication of such effects in cancer metastasis and the potential mechanism involved. The effects of CYM on the macrophages were evaluated by detecting the expression of M1 and M2 macrophage polarization markers through ELISA, quantitative RT-PCR and Western blot assay...
February 19, 2018: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/29471481/bacterial-fungal-interactions-ecology-mechanisms-and-challenges
#3
A Deveau, G Bonito, J Uehling, M Paoletti, M Becker, S Bindschedler, S Hacquard, V Hervé, J Labbé, O A Lastovetsky, S Mieszkin, L J Millet, B Vajna, P Junier, P Bonfante, B P Krom, S Olsson, J D van Elsas, L Y Wick
Fungi and bacteria are found living together in a wide variety of environments. Their interactions are significant drivers of many ecosystem functions and are important for the health of plants and animals. A large number of fungal and bacterial families are engaged in complex interactions that lead to critical behavioural shifts of the microorganisms ranging from mutualism to pathogenicity. The importance of bacterial-fungal interactions (BFI) in environmental science, medicine and biotechnology has led to the emergence of a dynamic and multidisciplinary research field that combines highly diverse approaches including molecular biology, genomics, geochemistry, chemical and microbial ecology, biophysics and ecological modelling...
February 19, 2018: FEMS Microbiology Reviews
https://www.readbyqxmd.com/read/29471480/family-medicine-clinic-a-case-study-of-a-hospital-family-medicine-practice-redesign-to-improve-chronic-disease-care-in-the-community-in-singapore
#4
Yee Wei Lim, Joanna Ling, Zoe Lim, Audrey Chia
Background: Singapore's health care system is strained by the health care needs of a rapidly aging population. The unprecedented collaboration between a public hospital and a private family practice to set up the Family Medicine Clinic (FMC) to co-manage patients with chronic disease is an example of efforts to shift care to the community. Objective: To explore patients' initial experience of shared chronic disease care in a private family practice setting. Methods: In this exploratory case study, we surveyed 330 patients with stable chronic diseases and interviewed 10 complex care patients and their caregivers...
February 17, 2018: Family Practice
https://www.readbyqxmd.com/read/29471393/the-severe-impairment-profile-a-conceptual-shift
#5
Jordan S Robinson, Robert L Collins, Brian I Miller, Vitor H Pacheco, Nicholas M Wisdom
Objective: The current study sought to evaluate and replicate the severe impairment profile (SIP) of the Word Memory Test (WMT) in patients referred for dementia evaluations. Method: The sample consisted of 125 patients referred for a neuropsychological evaluation at a large Veterans Affairs Medical Center. Patients were assigned a Clinical Dementia Rating (CDR) by blind raters, and were classified according to their performance on performance validity testing. Subsequent chart reviews were conducted to help in more accurately determining the presence of severe memory impairment likely due to an underlying dementing process versus poor effort/task engagement...
March 1, 2018: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/29471370/competitive-ability-of-capsella-species-with-different-mating-systems-and-ploidy-levels
#6
Sandra Petrone Mendoza, Martin Lascoux, Sylvain Glémin
Background and Aims: Capsella is a model genus for studying the transition from outcrossing to selfing, with or without change in ploidy levels. The genomic consequences and changes in reproductive traits (selfing syndrome) associated with these shifts have been studied in depth. However, potential ecological divergence among species of the genus has not been determined. Among ecological traits, competitive ability could be relevant for selfing evolution, as selfing has been shown to be statistically associated with reduced competitiveness in a recent meta-analysis...
February 17, 2018: Annals of Botany
https://www.readbyqxmd.com/read/29471367/evolution-of-genes-associated-with-gynoecium-patterning-and-fruit-development-in-solanaceae
#7
Clara Inés Ortiz-Ramírez, Sayonara Plata-Arboleda, Natalia Pabón-Mora
Background and Aims: The genetic basis of fruit development has been extensively studied in Arabidopsis, where major transcription factors controlling valve identity (i.e. FRUITFULL), replum development (i.e. REPLUMLESS) and the differentiation of the dehiscence zones (i.e. SHATTERPROOF, INDEHISCENT and ALCATRAZ) have been identified. This gene regulatory network in other flowering plants is influenced by duplication events during angiosperm diversification. Here we aim to characterize candidate fruit development genes in the Solanaceae and compare them with those of Brassicaceae...
February 17, 2018: Annals of Botany
https://www.readbyqxmd.com/read/29471358/eif4a-alleviates-the-translational-repression-mediated-by-classical-secondary-structures-more-than-by-g-quadruplexes
#8
Joseph A Waldron, Farheen Raza, John Le Quesne
Increased activity of the mRNA helicase eIF4A drives cellular malignancy by reprogramming cellular translation, and eIF4A activity is the direct or indirect target of many emerging cancer therapeutics. The enriched presence of (GGC)4 motifs, which have the potential to fold into two-layered G-quadruplexes, within the 5'UTRs of eIF4A-dependent mRNAs suggests that eIF4A is required for the unwinding of these structures within these eIF4A-controlled mRNAs. However, the existence of folded G-quadruplexes within cells remains controversial, and G-quadruplex folding is in direct competition with classical Watson-Crick based secondary structures...
February 19, 2018: Nucleic Acids Research
https://www.readbyqxmd.com/read/29471341/onchocerciasis-shifting-the-target-from-control-to-elimination-requires-a-new-first-step-elimination-mapping
#9
Maria P Rebollo, Honorat Zoure, Kisito Ogoussan, Yao Sodahlon, Eric A Ottesen, Paul T Cantey
The meaning of 'mapping' in relation to onchocerciasis has changed at least three times over the past 50 years as the programmatic goals and the assessment tools have changed. With the current goal being global elimination of Onchocerca volvulus (OV), all areas where OV might currently be transmitted and where mass drug administration (MDA) with ivermectin treatment has not been delivered previously must now be identified by careful, detailed 'elimination mapping' as either OV endemic or not, so that appropriate programmatic targets can be established...
March 1, 2018: International Health
https://www.readbyqxmd.com/read/29471339/the-role-of-the-ngdo-coordination-group-for-the-elimination-of-onchocerciasis
#10
Elizabeth Elhassan, Yaobi Zhang, Simon Bush, David Molyneux, Martin K H Kollmann, Yao Sodahlon, Frank Richards
The NGDO Coordination Group for the Control of Onchocerciasis was launched in 1992, and with the paradigm shift from control of disease to elimination of onchocerciasis transmission, the Group shifted its orientation to that new paradigm in 2013. It also changed its name, replacing 'control' with 'elimination.' In doing so, the Group has repositioned itself to build on the successes of the past to finish the job it began over 25 years ago.
March 1, 2018: International Health
https://www.readbyqxmd.com/read/29471236/shifts-of-system-performance-and-microbial-community-structure-in-a-constructed-wetland-after-exposing-silver-nanoparticles
#11
Chong Cao, Juan Huang, Chunni Yan, Jialiang Liu, Qian Hu, Wenzhu Guan
The increasing utilization of silver nanoparticles (Ag NPs) in industry and commerce inevitably raises its release into wastewater. In this work, effects of Ag NPs on system performance and microbial community along the way of a vertical flow constructed wetland (VFCW) were investigated, along with the removal and fate of Ag NPs within the system. Results showed that the performance of control wetland kept stable during the experimental period, and the top substrate layer (soil layer) of wetland could remove most of pollutants in the influent...
February 7, 2018: Chemosphere
https://www.readbyqxmd.com/read/29471227/the-impact-of-acute-and-short-term-methamphetamine-abstinence-on-brain-metabolites-a-proton-magnetic-resonance-spectroscopy-chemical-shift-imaging-study
#12
Antoinette Burger, Samantha J Brooks, Dan J Stein, Fleur M Howells
BACKGROUND: Abuse of methamphetamine (MA) is a global health concern. Previous1 H-MRS studies have found that, with methamphetamine abstinence (MAA), there are changes in n-acetyl-aspartate (NAA/Cr), myo-inositol (mI/Cr), choline (Cho/Cr and Cho/NAA), and glutamate with glutamine (Glx) metabolites. Limited studies have investigated the effect of acute MAA, and acute-to-short-term MAA on brain metabolites. METHODS: Adults with chronic MA dependence (n = 31) and healthy controls (n = 22) were recruited...
February 19, 2018: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/29471173/correlating-growth-mechanism-and-morphology-in-cu-tcnq-organometallic-complex-a-microscopic-study
#13
Gopala R Bhadu, Jayesh C Chaudhari, Babulal Rebary, Rajesh Patidar, Divesh N Srivastava
The structure-property correlation in the Cu-TCNQ organometallic complex is very important for explaining its unusual electrical, optical and magnetic properties. Consequently several morphological studies and their correlation with the properties of these materials can be found in the literature, although no systematic study of various morphologies with growth conditions and their correlation has been reported to the best of our knowledge. Therefore in this manuscript the interconversion of various morphologies is reported using electron and probe microscopies...
February 13, 2018: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/29471111/mortality-prediction-in-intensive-care-units-icus-using-a-deep-rule-based-fuzzy-classifier
#14
Raheleh Davoodi, Mohammad Hassan Moradi
Electronic health records (EHRs) contain critical information useful for clinical studies. Early assessment of patients' mortality in intensive care units is of great importance. In this paper, a Deep Rule-Based Fuzzy System (DRBFS) was proposed to develop an accurate in-hospital mortality prediction in the intensive care unit (ICU) patients employing a large number of input variables. Our main contribution is proposing a system, which is capable of dealing with big data with heterogeneous mixed categorical and numeric attributes...
February 19, 2018: Journal of Biomedical Informatics
https://www.readbyqxmd.com/read/29471099/the-dynamics-of-error-processing-in-the-human-brain-as-reflected-by-high-gamma-activity-in-noninvasive-and-intracranial-eeg
#15
Martin Völker, Lukas D J Fiederer, Sofie Berberich, Jiří Hammer, Joos Behncke, Pavel Kršek, Martin Tomášek, Petr Marusič, Peter C Reinacher, Volker A Coenen, Moritz Helias, Andreas Schulze-Bonhage, Wolfram Burgard, Tonio Ball
Error detection in motor behavior is a fundamental cognitive function heavily relying on cortical information processing. Neural activity in the high-gamma frequency band (HGB) closely reflects such local cortical processing, but little is known about its role in error processing, particularly in the healthy human brain. Here we characterize the error-related response of the human brain based on data obtained with noninvasive EEG optimized for HGB mapping in 31 healthy subjects (15 females, 16 males), and additional intracranial EEG data from 9 epilepsy patients (4 females, 5 males)...
February 19, 2018: NeuroImage
https://www.readbyqxmd.com/read/29471098/the-role-of-effective-connectivity-between-the-task-positive-and-task-negative-network-for-evidence-gathering-evidence-gathering-and-connectivity
#16
Christina Andreou, Saskia Steinmann, Katharina Kolbeck, Jonas Rauh, Gregor Leicht, Steffen Moritz, Christoph Mulert
Reports linking a 'jumping-to-conclusions' bias to delusions have led to growing interest in the neurobiological correlates of probabilistic reasoning. Several brain areas have been implicated in probabilistic reasoning; however, findings are difficult to integrate into a coherent account. The present study aimed to provide additional evidence by investigating, for the first time, effective connectivity among brain areas involved in different stages of evidence gathering. We investigated evidence gathering in 25 healthy individuals using fMRI and a new paradigm (Box Task) designed such as to minimize the effects of cognitive effort and reward processing...
February 19, 2018: NeuroImage
https://www.readbyqxmd.com/read/29471055/brain-insulin-signalling-glucose-metabolism-and-females-reproductive-aging-a-dangerous-triad-in-alzheimer-s-disease
#17
REVIEW
A I Duarte, M S Santos, C R Oliveira, P I Moreira
Alzheimer's disease (AD) constitutes a major socioeconomic challenge due to its disabling features and the rise in prevalence (especially among (peri)menopausal women and type 2 diabetes patients). The precise etiopathogenesis of AD remains poorly understood. Importantly, its neurodegenerative perspective has been challenged towards a more "systemic" view. Amyloid-β (Aβ) and hyperphosphorylated Tau protein (P-Tau) (the main AD neuropathological features) affect and are affected by peripheral and brain insulin signalling dysfunction, leading to glucose dysmetabolism, synaptic loss and AD-related cognitive deficits...
February 19, 2018: Neuropharmacology
https://www.readbyqxmd.com/read/29470993/stress-common-themes-toward-the-next-frontier
#18
REVIEW
Ilia N Karatsoreos
"Stress is complicated". A phrase uttered by many a stress researcher. This is true, from the vast array of stimuli considered "stressors" to the interactive and hormetic nature of the molecular, cellular, endocrine, and behavioral responses generated by such stressors. This commentary takes the position that stress researchers are poised to make even bigger contributions if they begin to shift from investigating the myriad effects of stress on brain and body, and to refocus a larger part of our efforts on more in-depth investigations of common themes in stress biology, with the goal of uncovering potential "universal principles" of stress that may help us better interpret the findings at higher levels of analysis, and provide a structured approach to help breach the next frontiers of stress research...
February 19, 2018: Frontiers in Neuroendocrinology
https://www.readbyqxmd.com/read/29470525/coral-reef-fishes-exhibit-beneficial-phenotypes-inside-marine-protected-areas
#19
Robert Y Fidler, Jessica Carroll, Kristen W Rynerson, Danielle F Matthews, Ralph G Turingan
Human fishing effort is size-selective, preferentially removing the largest individuals from harvested stocks. Intensive, size-specific fishing mortality induces directional shifts in phenotypic frequencies towards the predominance of smaller and earlier-maturing individuals, which are among the primary causes of declining fish biomass. Fish that reproduce at smaller size and younger age produce fewer, smaller, and less viable larvae, severely reducing the reproductive capacity of harvested populations. Marine protected areas (MPAs) are extensively utilized in coral reefs for fisheries management, and are thought to mitigate the impacts of size-selective fishing mortality and supplement fished stocks through larval export...
2018: PloS One
https://www.readbyqxmd.com/read/29470393/dft-insights-into-the-role-of-relative-positions-of-fe-and-n-dopants-on-the-structure-and-properties-of-tio%C3%A2
#20
Sahar Ramin Gul, Matiullah Khan, Zeng Yi, Bo Wu
The location and nature of the doped elements strongly affect the structural, electronic and optical properties of TiO₂. To tailor the band structure and modify the photoelectrochemical properties of TiO₂, a pair of dopants is selected. Fe and N atoms are inserted in the TiO₂ network at substitutional and interstitial sites with different relative distances. The main objective behind the different locations and sites of the doped elements is to banish the isolated unoccupied states from the forbidden region that normally annihilates the photogenerated carriers...
February 22, 2018: Materials
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