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Journal of Neuroscience: the Official Journal of the Society for Neuroscience

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https://www.readbyqxmd.com/read/28442538/peripheral-tumor-necrosis-factor-alpha-tnf-%C3%AE-modulates-amyloid-pathology-by-regulating-blood-derived-immune-cells-and-glial-response-in-the-brain-of-ad-tnf-transgenic-mice
#1
Evi Paouri, Ourania Tzara, Georgia-Ioanna Kartalou, Sofia Zenelak, Spiros Georgopoulos
Increasing evidence has suggested that systemic inflammation along with local brain inflammation can play a significant role in Alzheimer's disease (AD) pathogenesis. Identifying key molecules that regulate the crosstalk between the immune and the central nervous system can provide potential therapeutic targets. TNF-α is a pro-inflammatory cytokine implicated in the pathogenesis of systemic inflammatory and neurodegenerative diseases such as rheumatoid arthritis (RA) and AD. Recent studies have reported that anti-TNF-α therapy or RA itself can modulate AD pathology, although the underlying mechanism is unclear...
April 25, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28442537/age-related-reversals-in-neural-recruitment-across-memory-retrieval-phases
#2
Jaclyn H Ford, Elizabeth A Kensinger
Over the last several decades, neuroimaging research has identified age-related neural changes that occur during cognitive tasks. These changes are used to help researchers identify functional changes that contribute to age-related impairments in cognitive performance. One commonly reported example of such a change is an age-related decrease in recruitment of posterior sensory regions coupled with an increased recruitment of prefrontal regions across multiple cognitive tasks. This shift is often described as a compensatory recruitment of prefrontal regions due to age-related sensory processing deficits in posterior regions...
April 25, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28438970/the-severity-of-vestibular-dysfunction-in-deafness-as-a-determinant-of-comorbid-hyperactivity-or-anxiety
#3
Michelle W Antoine, Sarath Vijayakumar, Nicholas McKeehan, Sherri M Jones, Jean M Hébert
Attention-deficit/hyperactivity disorder (ADHD) and anxiety-related disorders occur at rates 2-3 times higher in deaf compared with hearing children. Potential explanations for these elevated rates and the heterogeneity of behavioral disorders associated with deafness have usually focused on socio-environmental rather than biological effects. Children with the 22q11.2 deletion or duplication syndromes often display hearing loss and behavioral disorders including ADHD and anxiety-related disorders. Here, we show that mouse mutants with either a gain- or loss-of-function of the T-Box transcription factor gene, Tbx1, which lies within the 22q11...
April 24, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28438969/intracellular-in-vivo-dynamics-of-thalamocortical-synapses-in-visual-cortex
#4
Madineh Sedigh-Sarvestani, Leif Vigeland, Ivan Fernandez-Lamo, Morgan Taylor, Larry A Palmer, Diego Contreras
Seminal studies of the thalamocortical (TC) circuit in the visual system of the cat have been central to our understanding of sensory encoding. However, TC synaptic properties remain poorly understood. We used paired recordings, in the lateral geniculate nucleus (LGN) and primary visual cortex (V1), to provide the first in vivo characterization of sensory-driven TC potentials in V1. The amplitudes of EPSPs we characterized were smaller than those previously reported in vitro. Consistent with prior findings, connected LGN-V1 pairs were only found when their receptive fields (RFs) overlapped, and the probability of connection increased steeply with degree of RF overlap and response similarity...
April 24, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28438968/neural-mechanisms-of-cognitive-dissonance-revised-an-eeg-study
#5
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/28438967/immune-induced-fever-is-dependent-on-local-but-not-generalized-prostaglandin-e2-synthesis-in-the-brain
#6
Anna Eskilsson, Takashi Matsuwaki, Kiseko Shionoya, Elahe Mirrasekhian, Joanna Zajdel, Markus Schwaninger, David Engblom, Anders Blomqvist
Fever occurs upon binding of prostaglandin E2 (PGE2) to EP3 receptors in the median preoptic nucleus of the hypothalamus, but the origin of the pyrogenic PGE2 has not been clearly determined. Here, using mice of both sexes, we examined the role of local vs generalized PGE2 production in the brain for the febrile response. In wild-type mice and in mice with genetic deletion of the prostaglandin synthesizing enzyme cyclooxygenase-2 in the brain endothelium, generated with an inducible CreER(T2) under the Slco1c1 promoter, PGE2 levels in the cerebrospinal fluid were only weakly related to the magnitude of the febrile response, whereas the PGE2 synthesizing capacity in the hypothalamus, as reflected in the levels of cyclooxygenase-2 mRNA, showed strong correlation with the immune-induced fever...
April 24, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28438966/mediation-of-movement-induced-breakthrough-cancer-pain-by-ib4-binding-nociceptors-in-rats
#7
Joshua Havelin, Ian Imbert, Devki Sukhtankar, Bethany Remeniuk, Ian Pelletier, Jonathan Gentry, Alec Okun, Timothy Tiutan, Frank Porreca, Tamara King
Cancer-induced bone pain (CIBP) is characterized by moderate to severe ongoing pain that commonly requires the use of opiates. Even when ongoing pain is well controlled, patients can suffer breakthrough pain (BTP), episodic severe pain that "breaks through" the medication. We developed a novel model of cancer-induced BTP using female rats with mammary adenocarcinoma cells sealed within the tibia. We previously demonstrated that rats with bone cancer learn to prefer a context paired with saphenous nerve block to elicit pain relief (i...
April 24, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28432144/age-related-effects-and-sex-differences-in-gray-matter-density-volume-mass-and-cortical-thickness-from-childhood-to-young-adulthood
#8
Efstathios D Gennatas, Brian B Avants, Daniel H Wolf, Theodore D Satterthwaite, Kosha Ruparel, Rastko Ciric, Hakon Hakonarson, Raquel E Gur, Ruben C Gur
Developmental structural neuroimaging studies in humans have long described decreases in gray matter volume and cortical thickness during adolescence. Gray matter density, a measure often assumed to be highly related to volume, has not been systematically investigated in development. We used T1 imaging data collected on the Philadelphia Neurodevelopmental Cohort to study age-related effects and sex differences in four regional gray matter measures in 1189 youths aged 8 to 23 years. Custom T1 segmentation and a novel high-resolution gray matter parcellation were used to extract gray matter density (GMD), gray matter volume (GMV), gray matter mass (GMM, defined as GMD * GMV), and cortical thickness (CT) from 1625 brain regions...
April 21, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28432143/focal-local-field-potential-lfp-signature-of-the-single-axon-monosynaptic-thalamocortical-connection
#9
Espen Hagen, Janne C Fossum, Klas H Pettersen, Jose-Manuel Alonso, Harvey A Swadlow, Gaute T Einevolla
Recent years have seen a resurgence in use of the extracellularly recorded local field potential (LFP) to investigate neural network activity. To probe monosynaptic thalamic activation of cortical postsynaptic target cells, so called spike-trigger-averaged LFP (stLFP) signatures have been measured. In these experiments the cortical LFP is measured by means of multielectrodes covering several cortical lamina and averaged on spontaneous spikes of thalamocortical (TC) cells. Using a well-established forward-modeling scheme, we investigate the biophysical origin of this stLFP signature with simultaneous synaptic activation of cortical layer 4 neurons, mimicking the effect of a single afferent spike from a single TC neuron...
April 21, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28432142/structural-similarities-between-neuregulin-1-3-isoforms-determine-their-subcellular-distribution-and-signaling-mode-in-central-neurons
#10
Detlef Vullhorst, Tanveer Ahmad, Irina Karavanova, Carolyn Keating, Andres Buonanno
The Neuregulin (NRG) family of ErbB ligands is comprised of numerous variants originating from the use of different genes, alternative promoters and splice variants. NRGs have generally been thought to be transported to axons and presynaptic terminals where they signal via ErbB3/4 receptors in paracrine or juxtacrine mode. However, we recently demonstrated that unprocessed pro-NRG2 accumulates on cell bodies and proximal dendrites, and that NMDAR activity is required for shedding of its ectodomain by metalloproteinases...
April 21, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28432141/the-spacing-effect-for-structural-synaptic-plasticity-provides-specificity-and-precision-in-plastic-changes
#11
Martin A San, L Rela, B D Gelb, M R Pagani
In contrast to trials of training without intervals (massed training), training trials spaced over time (spaced training) induce a more persistent memory identified as long-term memory (LTM). This phenomenon known as "the spacing effect for memory" is poorly understood. LTM is supported by structural synaptic plasticity; however, how synapses integrate spaced stimuli remains elusive. Here, we analyzed events of structural synaptic plasticity at the single synapse level after distinct patterns of stimulation in motoneurons of Drosophila We found that the spacing effect is a phenomenon detected at synaptic level, which determine the specificity and the precision in structural synaptic plasticity...
April 21, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28432140/visually-evoked-3-5-hz-membrane-potential-oscillations-reduce-the-responsiveness-of-visual-cortex-neurons-in-awake-behaving-mice
#12
Michael C Einstein, Pierre-Olivier Polack, Duy T Tran, Peyman Golshani
Low frequency membrane potential (Vm) oscillations were once thought to only occur in sleeping and anesthetized states. Recently, low frequency Vm oscillations have been described in inactive awake animals, but it is unclear if they shape sensory processing in neurons and whether they occur during active awake behavioral states. To answer these questions, we performed two-photon guided whole-cell Vm recordings from primary visual cortex layer 2/3 excitatory and inhibitory neurons in awake mice during passive visual stimulation and performance of visual and auditory discrimination tasks...
April 21, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28432139/feature-selective-attention-adaptively-shifts-noise-correlations-in-primary-auditory-cortex
#13
Joshua Downer, Brittany Rapone, Jessica Verhein, Kevin N O'Connor, Mitchell L Sutter
Sensory environments often contain an overwhelming amount of information, with both relevant and irrelevant information competing for neural resources. Feature attention mediates this competition by selecting the sensory features needed to form a coherent percept. How attention affects the activity of populations of neurons to support this process is poorly understood because population coding is typically studied through simulations in which one sensory feature is encoded without competition. Therefore, to study the effects of feature attention on population-based neural coding, investigations must be extended to include stimuli with both relevant and irrelevant features...
April 21, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28432138/inhibition-of-drp1-ameliorates-synaptic-depression-a%C3%AE-deposition-and-cognitive-impairment-in-alzheimer-s-disease-model
#14
Seung-Hyun Baek, So Jung Park, Jae In Jeong, Sung Hyun Kim, Jihoon Han, Jae Won Kyung, Sang-Ha Baik, Yuri Choi, Bo-Youn Choi, Jinsu Park, Gahee Bahn, Ji Hyun Shin, Doo Sin Jo, Joo-Yong Lee, Choon-Gon Jang, Thiruma V Arumugam, Jongpil Kim, Jeung-Whan Han, Jae-Young Koh, Dong-Hyung Cho, Dong-Gyu Jo
Excessive mitochondrial fission is a prominent early event, and contributes to mitochondrial dysfunction, synaptic failure and neuronal cell death in the progression of Alzheimer's disease (AD). However, it remains to be determined whether inhibition of excessive mitochondrial fission is beneficial in mammal models of AD. To determine whether dynamin-related protein 1 (Drp1), a key regulator of mitochondrial fragmentation, can be a disease-modifying therapeutic target for AD, we examine the effects of Drp1 inhibitor on mitochondrial and synaptic dysfunctions induced by oligomeric β-amyloid (Aβ) in neurons, and neuropathology and cognitive functions in APP/PS1 double transgenic AD mice...
April 21, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28432137/dissociation-of-choice-formation-and-choice-correlated-activity-in-macaque-visual-cortex
#15
Robbe L T Goris, Corey M Ziemba, Gabriel M Stine, Eero P Simoncelli, J Anthony Movshon
Responses of individual task-relevant sensory neurons can predict monkeys' trial-by-trial choices in perceptual decision-making tasks. Choice-correlated activity has been interpreted as evidence that the responses of these neurons are causally linked to perceptual judgements. To further test this hypothesis, we studied responses of orientation-selective neurons in V1 and V2 while two macaque monkeys performed a fine orientation discrimination task. Although both animals exhibited a high level of neuronal and behavioral sensitivity, only one exhibited choice-correlated activity...
April 21, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28432136/selective-modulation-of-the-pupil-light-reflex-by-prefrontal-cortex-microstimulation
#16
R Becket Ebitz, Tirin Moore
The prefrontal cortex (PFC) is thought to flexibly regulate sensorimotor responses. One way the PFC regulates sensorimotor transformations is to modulate activity in other circuits. However, the scope of that control remains unknown: it remains unclear whether the prefrontal cortex can modulate basic reflexes. One canonical example of a central reflex is the pupil light reflex (PLR): the automatic constriction of the pupil in response to luminance increments. Unlike pupil size, which depends the interaction of multiple physiological and neuromodulatory influences, the PLR reflects the action of a simple brainstem circuit...
April 21, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28424219/down-regulation-of-rbo-pi4kiii%C3%AE-facilitates-a%C3%AE-42-secretion-and-ameliorates-neural-deficits-in-a%C3%AE-42-expressing-drosophila
#17
Xiao Zhang, Wen-An Wang, Li-Xiang Jiang, Hai-Yan Liu, Bao-Zhu Zhang, Nastasia Lim, Qing-Yi Li, Fu-De Huang
Phosphoinositides and their metabolizing enzymes are involved in Aβ42 metabolism and Alzheimer's disease (AD) pathogenesis. In yeast and mammals, Eighty-five requiring 3 (EFR3), whose Drosophila homolog is Rolling Blackout (RBO), forms a plasma membrane-localized protein complex with phosphatidylinositol-4-kinase type IIIα(PI4KIIIα) and a scaffold protein to tightly control the level of plasmalemmal phosphatidylinositol-4-phosphate (PI4P). Here, we report that RBO binds to Drosophila PI4KIIIα, and that in an Aβ42-expressing Drosophila model, separate genetic reduction of PI4KIIIα and RBO, or pharmacological inhibition of PI4KIIIα ameliorated synaptic transmission deficit, climbing ability decline, and premature death, and reduced neuronal accumulation of Aβ42 Moreover, we found that RBO-PI4KIIIa downregulation increased neuronal Aβ42 release, and that PI4P facilitated the assembly or oligomerization of Aβ42 in/on liposomes...
April 19, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28416597/posterior-inferotemporal-cortex-cells-use-multiple-input-pathways-for-shape-encoding
#18
Carlos R Ponce, Stephen G Lomber, Margaret S Livingstone
In the macaque monkey brain, posterior inferior temporal cortex (PIT) cells contribute to visual object recognition. They receive concurrent inputs from visual areas V4, V3 and V2. We asked how these different anatomical pathways shape PIT response properties by deactivating them while monitoring PIT activity in two male macaques. We found that cooling of V4 or V2|3 did not lead to consistent changes in population excitatory drive, however, population pattern analyses showed that V4-based pathways were more important than V2|3-based pathways...
April 17, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28416596/microrna-profiling-reveals-marker-of-motor-neuron-disease-in-als-models
#19
Mariah L Hoye, Erica D Koval, Amy J Wegener, Theodore S Hyman, Chengran Yang, David R O'Brien, Rebecca L Miller, Tracy Cole, Kathleen M Schoch, Tao Shen, Tomonori Kunikata, Jean-Philippe Richard, David H Gutmann, Nicholas J Maragakis, Holly B Kordasiewicz, Joseph D Dougherty, Timothy M Miller
Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disorder marked by the loss of motor neurons (MNs) in the brain and spinal cord, leading to fatally debilitating weakness. Because this disease predominantly affects MNs, we aimed to characterize the distinct expression profile of that cell type in order to elucidate underlying disease mechanisms and identify novel targets that inform on MN health during ALS disease timecourse. microRNAs (miRNAs) are short, non-coding RNAs that can shape the expression profile of a cell and, consequently, often exhibit cell type enriched expression...
April 17, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28416595/nonsinusoidal-beta-oscillations-reflect-cortical-pathophysiology-in-parkinson-s-disease
#20
Scott R Cole, Roemer van der Meij, Erik J Peterson, Coralie de Hemptinne, Philip A Starr, Bradley Voytek
Oscillations in neural activity play a critical role in neural computation and communication. There is intriguing new evidence that the nonsinusoidal features of the oscillatory waveforms may inform underlying physiological and pathophysiological characteristics. Time-domain waveform analysis approaches stand in contrast to traditional Fourier-based methods, which alter or destroy subtle waveform features. Recently it has been shown that the waveform features of oscillatory beta (13-30 Hz) events-a prominent motor cortical oscillation-may reflect near-synchronous excitatory synaptic inputs onto cortical pyramidal neurons...
April 17, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
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