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https://www.readbyqxmd.com/read/28524745/actin-cytoskeleton-regulates-functional-anchorage-migration-switch-during-t-cadherin-induced-phenotype-modulation-of-vascular-smooth-muscle-cells
#1
Agne Frismantiene, Emmanouil Kyriakakis, Boris Dasen, Paul Erne, Therese J Resink, Maria Philippova
Vascular smooth muscle cell (SMC) switching between differentiated and dedifferentiated phenotypes is reversible and accompanied by morphological and functional alterations that require reconfiguration of cell-cell and cell-matrix adhesion networks. Studies attempting to explore changes in overall composition of the adhesion nexus during SMC phenotype transition are lacking. We have previously demonstrated that T-cadherin knockdown enforces SMC differentiation, whereas T-cadherin upregulation promotes SMC dedifferentiation...
May 19, 2017: Cell Adhesion & Migration
https://www.readbyqxmd.com/read/28516933/experimental-characterization-of-a-quantum-many-body-system-via-higher-order-correlations
#2
Thomas Schweigler, Valentin Kasper, Sebastian Erne, Igor Mazets, Bernhard Rauer, Federica Cataldini, Tim Langen, Thomas Gasenzer, Jürgen Berges, Jörg Schmiedmayer
Quantum systems can be characterized by their correlations. Higher-order (larger than second order) correlations, and the ways in which they can be decomposed into correlations of lower order, provide important information about the system, its structure, its interactions and its complexity. The measurement of such correlation functions is therefore an essential tool for reading, verifying and characterizing quantum simulations. Although higher-order correlation functions are frequently used in theoretical calculations, so far mainly correlations up to second order have been studied experimentally...
May 17, 2017: Nature
https://www.readbyqxmd.com/read/28507528/cognitive-impairments-in-occupational-burnout-error-processing-and-its-indices-of-reactive-and-proactive-control
#3
Krystyna Golonka, Justyna Mojsa-Kaja, Magda Gawlowska, Katarzyna Popiel
The presented study refers to cognitive aspects of burnout as the effects of long-term work-related stress. The purpose of the study was to investigate electrophysiological correlates of burnout to explain the mechanisms of the core burnout symptoms: exhaustion and depersonalization/cynicism. The analyzed error-related electrophysiological markers shed light on impaired cognitive mechanisms and the specific changes in information-processing in burnout. In the EEG study design (N = 80), two components of error-related potential (ERP), error-related negativity (ERN), and error positivity (Pe), were analyzed...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28486713/probing-the-behavioral-and-neurophysiological-effects-of-acute-smoking-abstinence-on-drug-and-nondrug-reinforcement-during-a-cognitive-task
#4
Nicolas J Schlienz, Larry W Hawk
Introduction: Smoking abstinence is theorized to increase smoking reinforcement and decrease nondrug reinforcement. A separate literature demonstrates the detrimental effects of abstinence on cognition. The present study integrates these two areas by examining the separate and combined effects of reinforcement and smoking abstinence on behavior and a neurophysiological index of response monitoring (ie, error-related negativity [ERN]) during a cognitive task. Methods: After a screening visit, adult smokers attended two laboratory visits, once while smoking and once while abstinent...
June 1, 2017: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/28479191/isotopically-nonstationary-13-c-flux-analysis-of-cyanobacterial-isobutyraldehyde-production
#5
Lara J Jazmin, Yao Xu, Yi Ern Cheah, Adeola O Adebiyi, Carl Hirschie Johnson, Jamey D Young
We applied isotopically nonstationary (13)C metabolic flux analysis (INST-MFA) to compare the pathway fluxes of wild-type (WT) Synechococcus elongatus PCC 7942 to an engineered strain (SA590) that produces isobutyraldehyde (IBA). The flux maps revealed a potential bottleneck at the pyruvate kinase (PK) reaction step that was associated with diversion of flux into a three-step PK bypass pathway involving the enzymes PEP carboxylase (PEPC), malate dehydrogenase (MDH), and malic enzyme (ME). Overexpression of pk in SA590 led to a significant improvement in IBA specific productivity...
May 4, 2017: Metabolic Engineering
https://www.readbyqxmd.com/read/28464703/neural-correlates-of-error-monitoring-in-adult-attention-deficit-hyperactivity-disorder-after-failed-inhibition-in-an-emotional-go-no-go-task
#6
Lívia Balogh, Brigitta Kakuszi, Szilvia Papp, László Tombor, István Bitter, Pál Czobor
The authors' aim was to investigate the modulation of event-related potentials (ERPs) by the affective content of stimuli in adult attention deficit hyperactivity disorder (ADHD) patients during error monitoring. By obtaining ERPs from 26 adult ADHD patients and 14 healthy controls in an emotional go/no-go task, the authors investigated two error-related ERP components, the error-related negativity (ERN) and error positivity (Pe). In ADHD patients, the ERN amplitude decreased for negative stimuli after failed response inhibition ("nogo response") and Pe amplitude decreased for neutral stimuli compared with the controls...
May 3, 2017: Journal of Neuropsychiatry and Clinical Neurosciences
https://www.readbyqxmd.com/read/28461233/inhibition-of-reductase-systems-by-2-aapa-modulates-peroxiredoxin-oxidation-and-mitochondrial-function-in-a172-glioblastoma-cells
#7
Luiz Felipe de Souza, Ariana Ern Schmitz, Luana Caroline Schüler da Silva, Karen Andrinéia de Oliveira, Cláudia Beatriz Nedel, Carla Inês Tasca, Andreza Fabro de Bem, Marcelo Farina, Alcir Luiz Dafre
Thiol homeostasis has a critical role in the maintenance of proper cellular functions and survival, being coordinated by the action of several reductive enzymes, including glutathione (GSH)/glutathione reductase (GR) and thioredoxin (Trx)/thioredoxin reductase (TrxR) systems. Here, we investigated the effects of the GR inhibitor 2-acetylamino-3-[4-(2-acetylamino-2-carboxyethylsulfanylthiocarbonylamino)phenylthiocarbamoylsulfanyl]propionic acid (2-AAPA) on the activity of thiol reductases (GR and TrxR), redox balance and mitochondrial function of A172 glioblastoma cells...
April 29, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28454085/baseline-clinical-predictors-of-antitumor-response-to-the-parp-inhibitor-olaparib-in-germline-brca1-2-mutated-patients-with-advanced-ovarian-cancer
#8
Saeed Rafii, Charlie Gourley, Rajiv Kumar, Elena Geuna, Joo Ern Ang, Tzyvia Rye, Lee-May Chen, Ronnie Shapira-Frommer, Michael Friedlander, Ursula Matulonis, Jacques De Greve, Amit M Oza, Susana Banerjee, L Rhoda Molife, Martin E Gore, Stan B Kaye, Timothy A Yap
BACKGROUND: The PARP inhibitor olaparib was recently granted Food and Drug Administration (FDA) accelerated approval in patients with advanced BRCA1/2 mutation ovarian cancer. However, antitumor responses are observed in only approximately 40% of patients and the impact of baseline clinical factors on response to treatment remains unclear. Although platinum sensitivity has been suggested as a marker of response to PARP inhibitors, patients with platinum-resistant disease still respond to olaparib...
April 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28447844/frontal-theta-band-oscillations-predict-error-correction-and-posterror-slowing-in-typing
#9
Çığır Kalfaoğlu, Tom Stafford, Elizabeth Milne
Performance errors are associated with robust behavioral and electroencephalography (EEG) effects. However, there is a debate about the nature of the relationship between these effects and implicit versus explicit error awareness. Our aim was to study the relationship between error related electrophysiological effects, such as spectral perturbations in fronto-medial theta band oscillations (FMT), and error awareness in typing. Typing has an advantage as an experimental paradigm in that detected errors are quickly and habitually signaled by the participant using backspace, allowing separation of detected from undetected errors without interruption in behavior...
April 27, 2017: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/28447803/psychometrics-and-the-neuroscience-of-individual-differences-internal-consistency-limits-between-subjects-effects
#10
Greg Hajcak, Alexandria Meyer, Roman Kotov
In the clinical neuroscience literature, between-subjects differences in neural activity are presumed to reflect reliable measures-even though the psychometric properties of neural measures are almost never reported. The current article focuses on the critical importance of assessing and reporting internal consistency reliability-the homogeneity of "items" that comprise a neural "score." We demonstrate how variability in the internal consistency of neural measures limits between-subjects (i.e., individual differences) effects...
April 27, 2017: Journal of Abnormal Psychology
https://www.readbyqxmd.com/read/28446578/brain-negativity-as-an-indicator-of-predictive-error-processing-the-contribution-of-visual-action-effect-monitoring
#11
Michael Joch, Mathias Hegele, Heiko Maurer, Hermann Müller, Lisa Katharina Maurer
The error-(related)-negativity (Ne/ERN) is an event-related potential in the electroencephalogram (EEG) correlating with error processing. Its conditions of appearance prior to terminal external error information suggest that the Ne/ERN is indicative of predictive processes in the evaluation of errors. The aim of the present study was to specifically examine the Ne/ERN in a complex motor task and to particularly rule out other explaining sources of the Ne/ERN aside from error prediction processes. To this end, we focused on the dependency of the Ne/ERN on visual monitoring about the action outcome after movement termination but prior to result feedback (action effect monitoring)...
April 26, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28438968/neural-mechanisms-of-cognitive-dissonance-revised-an-eeg-study
#12
Marco Colosio, Anna Shestakova, Vadim V Nikulin, Evgeny Blagovechtchenski, Vasily Klucharev
Cognitive dissonance theory suggests that our preferences are modulated by the mere act of choosing. A choice between two similarly valued alternatives creates psychological tension (cognitive dissonance) that is reduced by a post-decisional reevaluation of the alternatives. We measured EEG of human subjects during rest and free-choice paradigm. Our study demonstrates that choices associated with stronger cognitive dissonance trigger a larger negative fronto-central evoked response similar to error-related negativity (ERN), which has in turn been implicated in general performance monitoring...
April 24, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28433090/neural-biomarker-and-early-temperament-predict-increased-internalizing-symptoms-after-a%C3%A2-natural-disaster
#13
Alexandria Meyer, Carla Kmett Danielson, Allison P Danzig, Vickie Bhatia, Sarah R Black, Evelyn Bromet, Gabrielle Carlson, Greg Hajcak, Roman Kotov, Daniel N Klein
OBJECTIVE: Although most people will experience a traumatic event at some point in their life, only some will develop significant psychological symptoms in the aftermath. In the current study, we use a preexisting longitudinal study located in Long Island to examine the impact of Hurricane Sandy on internalizing symptoms in a large sample of children. We focused on temperamental fear and a biomarker of risk for anxiety, the error-related negativity (ERN). The ERN is a negative deflection in the event-related potential (ERP) occurring when individuals make mistakes and is increased in anxious individuals...
May 2017: Journal of the American Academy of Child and Adolescent Psychiatry
https://www.readbyqxmd.com/read/28427482/a-genetic-variant-brain-dervied-neurotrophic-factor-bdnf-polymorphism-interacts-with-hostile-parenting-to-predict-error-related-brain-activity-and-thereby-risk-for-internalizing-disorders-in-children
#14
Alexandria Meyer, Greg Hajcak, Elizabeth Hayden, Haroon I Sheikh, Shiva M Singh, Daniel N Klein
The error-related negativity (ERN) is a negative deflection in the event-related potential occurring when individuals make mistakes, and is increased in children with internalizing psychopathology. We recently found that harsh parenting predicts a larger ERN in children, and recent work has suggested that variation in the brain-derived neurotrophic factor (BDNF) gene may moderate the impact of early life adversity. Parents and children completed measures of parenting when children were 3 years old (N = 201); 3 years later, the ERN was measured and diagnostic interviews as well as dimensional symptom measures were completed...
April 21, 2017: Development and Psychopathology
https://www.readbyqxmd.com/read/28410524/cognitive-control-in-young-heavy-drinkers-an-erp-study
#15
Ingmar H A Franken, Maartje Luijten, Frederik M van der Veen, Jan W van Strien
Substance use disorders have been frequently linked to an impaired cognitive control system. Whether this impaired control is also present in young adults who heavily drink alcohol is still subject to debate. The present study investigated possible impairments in cognitive control in heavy drinkers using behavioral and electrophysiological (EEG) measures. We studied behavioral performance on an inhibitory control and an error-processing task, using a GoNogo task and an Eriksen Flanker task respectively, while ERPs (Nogo-N2/P3 and ERN/Pe) were measured in a group of heavy alcohol drinkers (n=48) and a healthy control group of light drinkers (n=49)...
June 1, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28410485/impact-of-posttraumatic-stress-symptom-dimensions-on-psychophysiological-reactivity-to-threat-and-reward
#16
Lynne Lieberman, Stephanie M Gorka, Carter J Funkhouser, Stewart A Shankman, K Luan Phan
Posttraumatic stress symptoms (PTSS) are associated with significant distress and impairment. Research has therefore focused on identifying neurobehavioral deficits that contribute to the pathophysiology of PTSS. One issue that has contributed to difficulty in identifying these deficits is the highly heterogeneous nature of PTSS. PTSS is comprised of four, factor analytically distinct dimensions of symptoms - re-experiencing, avoidance, hyperarousal, and negative cognitions and mood. It is therefore unlikely that there is one single mechanism that accounts for all of PTSS and elucidating neurobehavioral deficits associated with specific PTSS symptom dimensions may better inform clinical prevention and intervention efforts...
April 7, 2017: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/28394438/stimulus-processing-and-error-monitoring-in-more-able-kindergarteners-with-autism-spectrum-disorder-asd-a-short-review-and-a-preliminary-erp-study
#17
So Hyun Kim, Jennie Grammer, Nurit Benrey, Frederick Morrison, Catherine Lord
Deficits in executive functions (EF) in individuals with autism spectrum disorder (ASD) have been identified. However, there is limited evidence about patterns of deficits in EF-related skills, especially at the neurobiological level, in young children with ASD and little is known about how these skills are related to other domains of functioning and symptom severity. In this study, we provide a focused review of EF-related Event-Related Potentials (ERP) studies in children with ASD, accompanied by preliminary data for neurophysiological correlates of EF on a child-friendly Go/No-go task...
April 10, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28392425/t-cadherin-promotes-autophagy-and-survival-in-vascular-smooth-muscle-cells-through-mek1-2-erk1-2-axis-activation
#18
Emmanouil Kyriakakis, Agne Frismantiene, Boris Dasen, Dennis Pfaff, Olga Rivero, Klaus-Peter Lesch, Paul Erne, Therese J Resink, Maria Philippova
Autophagy is an evolutionary conserved intracellular catabolic process of vital importance to cell and tissue homeostasis. Autophagy is implicated in the pathogenesis of atherosclerosis but participating cells, molecular mechanisms and functional outcomes have not been fully elucidated. T-cadherin, an atypical glycosylphosphatidylinositol-anchored member of the cadherin superfamily of adhesion molecules, is upregulated on smooth muscle cells (SMCs)(1) in atherosclerotic lesions. Here, using rat and murine aortic SMCs as experimental models, we surveyed the ability of T-cadherin to regulate autophagy in SMCs during serum-starvation stress...
April 6, 2017: Cellular Signalling
https://www.readbyqxmd.com/read/28383759/pubertal-development-and-anxiety-risk-independently-relate-to-startle-habituation-during-fear-conditioning-in-8-14-year-old-females
#19
Felicia Jackson, Brady D Nelson, Alexandria Meyer, Greg Hajcak
Reduced habituation to aversive stimuli has been observed during adolescence and may reflect an underlying mechanism of vulnerability for anxiety disorders. This study examined the startle reflex during a fear-learning task in 54 8-14-year-old girls. We examined the relationship between mean startle, startle habituation, pubertal development, and two measures linked to risk for anxiety: behavioral inhibition system (BIS) and the error-related negativity (ERN). Puberty, BIS, and the ERN were unrelated to mean startle; however, each measure modulated startle habituation...
April 6, 2017: Developmental Psychobiology
https://www.readbyqxmd.com/read/28374659/modulation-of-error-monitoring-in-obsessive-compulsive-disorder-by-individually-tailored-symptom-provocation
#20
D Roh, J-G Chang, S W Yoo, J Shin, C-H Kim
BACKGROUND: The enhanced error monitoring in patients with obsessive-compulsive disorder (OCD), typically measured with the error-related negativity (ERN), has been found to be temporally stable and independent of symptom expression. Here, we examined whether the error monitoring in patients with OCD could be experimentally modulated by individually tailored symptom provocation. METHOD: Twenty patients with OCD and 20 healthy controls performed a flanker task in which OCD-relevant or neutral pictures were presented prior to a flanker stimulus...
April 4, 2017: Psychological Medicine
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