journal
MENU ▼
Read by QxMD icon Read
search

ENeuro

journal
https://www.readbyqxmd.com/read/29774231/semaphorin3a-signaling-is-dispensable-for-motor-axon-reinnervation-of-the-adult-neuromuscular-junction
#1
Jennifer L Shadrach, Brian A Pierchala
The neuromuscular junction (NMJ) is a specialized synapse that is formed by motor axon innervation of skeletal muscle fibers. The maintenance of motor-muscle connectivity is critical for the preservation of muscle tone and generation of movement. Injury can induce a robust regenerative response in motor axons, but severe trauma or chronic denervation resulting from neurodegenerative disease typically leads to inefficient repair and poor functional recovery. The axon guidance molecule Semaphorin3A (Sema3A) has been implicated as a negative regulator of motor innervation...
May 2018: ENeuro
https://www.readbyqxmd.com/read/29756029/circadian-behavioral-responses-to-light-and-optic-chiasm-evoked-glutamatergic-epscs-in-the-suprachiasmatic-nucleus-of-iprgc-conditional-vglut2-knock-out-mice
#2
Michael G Moldavan, Patricia J Sollars, Michael R Lasarev, Charles N Allen, Gary E Pickard
Intrinsically photosensitive retinal ganglion cells (ipRGCs) innervate the hypothalamic suprachiasmatic nucleus (SCN), a circadian oscillator that functions as a biological clock. ipRGCs use vesicular glutamate transporter 2 (vGlut2) to package glutamate into synaptic vesicles and light-evoked resetting of the SCN circadian clock is widely attributed to ipRGC glutamatergic neurotransmission. Pituitary adenylate cyclase-activating polypeptide (PACAP) is also packaged into vesicles in ipRGCs and PACAP may be coreleased with glutamate in the SCN...
May 2018: ENeuro
https://www.readbyqxmd.com/read/29756028/sharpening-of-hierarchical-visual-feature-representations-of-blurred-images
#3
Mohamed Abdelhack, Yukiyasu Kamitani
The robustness of the visual system lies in its ability to perceive degraded images. This is achieved through interacting bottom-up, recurrent, and top-down pathways that process the visual input in concordance with stored prior information. The interaction mechanism by which they integrate visual input and prior information is still enigmatic. We present a new approach using deep neural network (DNN) representation to reveal the effects of such integration on degraded visual inputs. We transformed measured human brain activity resulting from viewing blurred images to the hierarchical representation space derived from a feedforward DNN...
May 2018: ENeuro
https://www.readbyqxmd.com/read/29780881/nucleus-accumbens-microcircuit-underlying-d2-msn-driven-increase-in-motivation
#4
Carina Soares-Cunha, Bárbara Coimbra, Ana Verónica Domingues, Nivaldo Vasconcelos, Nuno Sousa, Ana João Rodrigues
The nucleus accumbens (NAc) plays a central role in reinforcement and motivation. Around 95% of the NAc neurons are medium spiny neurons (MSNs), divided into those expressing dopamine receptor D1 (D1R) or dopamine receptor D2 (D2R). Optogenetic activation of D2-MSNs increased motivation, whereas inhibition of these neurons produced the opposite effect. Yet, it is still unclear how activation of D2-MSNs affects other local neurons/interneurons or input terminals and how this contributes for motivation enhancement...
March 2018: ENeuro
https://www.readbyqxmd.com/read/29780880/circadian-and-brain-state-modulation-of-network-hyperexcitability-in-alzheimer-s-disease
#5
Rosalind Brown, Alice D Lam, Alfredo Gonzalez-Sulser, Andrew Ying, Mary Jones, Robert Chang-Chih Chou, Makis Tzioras, Crispin Y Jordan, Izabela Jedrasiak-Cape, Anne-Laure Hemonnot, Maurice Abou Jaoude, Andrew J Cole, Sydney S Cash, Takashi Saito, Takaomi Saido, Richard R Ribchester, Kevan Hashemi, Iris Oren
Network hyperexcitability is a feature of Alzheimer' disease (AD) as well as numerous transgenic mouse models of AD. While hyperexcitability in AD patients and AD animal models share certain features, the mechanistic overlap remains to be established. We aimed to identify features of network hyperexcitability in AD models that can be related to epileptiform activity signatures in AD patients. We studied network hyperexcitability in mice expressing amyloid precursor protein (APP) with mutations that cause familial AD, and compared a transgenic model that overexpresses human APP (hAPP) (J20), to a knock-in model expressing APP at physiological levels (APPNL/F )...
March 2018: ENeuro
https://www.readbyqxmd.com/read/29780879/altered-cerebellar-short-term-plasticity-but-no-change-in-postsynaptic-ampa-type-glutamate-receptors-in-a-mouse-model-of-juvenile-batten-disease
#6
Dorota Studniarczyk, Elizabeth L Needham, Hannah M Mitchison, Mark Farrant, Stuart G Cull-Candy
Juvenile Batten disease is the most common progressive neurodegenerative disorder of childhood. It is associated with mutations in the CLN3 gene, causing loss of function of CLN3 protein and degeneration of cerebellar and retinal neurons. It has been proposed that changes in granule cell AMPA-type glutamate receptors (AMPARs) contribute to the cerebellar dysfunction. In this study, we compared AMPAR properties and synaptic transmission in cerebellar granule cells from wild-type and Cln3 knock-out mice. In Cln3 Δ ex1-6 cells, the amplitude of AMPA-evoked whole-cell currents was unchanged...
March 2018: ENeuro
https://www.readbyqxmd.com/read/29766048/phasic-stimulation-of-midbrain-dopamine-neuron-activity-reduces-salt-consumption
#7
Eleanor C Sandhu, Anushka B P Fernando, Elaine E Irvine, Kyoko Tossell, Michelle Kokkinou, Justyna Glegola, Mark A Smith, Oliver D Howes, Dominic J Withers, Mark A Ungless
Salt intake is an essential dietary requirement, but excessive consumption is implicated in hypertension and associated conditions. Little is known about the neural circuit mechanisms that control motivation to consume salt, although the midbrain dopamine system, which plays a key role in other reward-related behaviors, has been implicated. We, therefore, examined the effects on salt consumption of either optogenetic excitation or chemogenetic inhibition of ventral tegmental area (VTA) dopamine neurons in male mice...
March 2018: ENeuro
https://www.readbyqxmd.com/read/29766047/a-transient-dopamine-signal-represents-avoidance-value-and-causally-influences-the-demand-to-avoid
#8
Katherine J Pultorak, Scott A Schelp, Dominic P Isaacs, Gregory Krzystyniak, Erik B Oleson
While an extensive literature supports the notion that mesocorticolimbic dopamine plays a role in negative reinforcement, recent evidence suggests that dopamine exclusively encodes the value of positive reinforcement. In the present study, we employed a behavioral economics approach to investigate whether dopamine plays a role in the valuation of negative reinforcement. Using rats as subjects, we first applied fast-scan cyclic voltammetry (FSCV) to determine that dopamine concentration decreases with the number of lever presses required to avoid electrical footshock (i...
March 2018: ENeuro
https://www.readbyqxmd.com/read/29766046/deletion-of-tsc2-in-nociceptors-reduces-target-innervation-ion-channel-expression-and-sensitivity-to-heat
#9
Dan Carlin, Judith P Golden, Amit Mogha, Vijay K Samineni, Kelly R Monk, Robert W Gereau, Valeria Cavalli
The mechanistic target of rapamycin complex 1 (mTORC1) is known to regulate cellular growth pathways, and its genetic activation is sufficient to enhance regenerative axon growth following injury to the central or peripheral nervous systems. However, excess mTORC1 activation may promote innervation defects, and mTORC1 activity mediates injury-induced hypersensitivity, reducing enthusiasm for the pathway as a therapeutic target. While mTORC1 activity is required for full expression of some pain modalities, the effects of pathway activation on nociceptor phenotypes and sensory behaviors are currently unknown...
March 2018: ENeuro
https://www.readbyqxmd.com/read/29766045/post-stroke-intranasal-naloxone-delivery-reduces-microglial-activation-and-improves-behavioral-recovery-from-ischemic-injury
#10
Jenni E Anttila, Katrina Albert, Emily S Wires, Kert Mätlik, Lisa C Loram, Linda R Watkins, Kenner C Rice, Yun Wang, Brandon K Harvey, Mikko Airavaara
Ischemic stroke is the leading cause of disability, and effective therapeutic strategies are needed to promote complete recovery. Neuroinflammation plays a significant role in stroke pathophysiology, and there is limited understanding of how it affects recovery. The aim of this study was to characterize the spatiotemporal expression profile of microglial activation and whether dampening microglial/macrophage activation post-stroke facilitates the recovery. For dampening microglial/macrophage activation, we chose intranasal administration of naloxone, a drug that is already in clinical use for opioid overdose and is known to decrease microglia/macrophage activation...
March 2018: ENeuro
https://www.readbyqxmd.com/read/29766044/filter-based-phase-shifts-distort-neuronal-timing-information
#11
Dorin Yael, Jacob J Vecht, Izhar Bar-Gad
Filters are widely used for the modulation, typically attenuation, of amplitudes of different frequencies within neurophysiological signals. Filters, however, also induce changes in the phases of different frequencies whose amplitude is unmodulated. These phase shifts cause time lags in the filtered signals, leading to a disruption of the timing information between different frequencies within the same signal and between different signals. The emerging time lags can be either constant in the case of linear phase (LP) filters or vary as a function of the frequency in the more common case of non-LP (NLP) filters...
March 2018: ENeuro
https://www.readbyqxmd.com/read/29766043/erratum-dash-et-al-poly-adp-ribose-polymerase-1-parp-1-induction-by-cocaine-is-post-transcriptionally-regulated-by-mir-125b-eneuro-july-august-2017-4-4-e0089-17-2017-1-16-https-doi-org-10-1523-eneuro-0089-17-2017
#12
(no author information available yet)
[This corrects the article DOI: 10.1523/ENEURO.0089-17.2017.][This corrects the article DOI: 10.1523/ENEURO.0089-17.2017.].
March 2018: ENeuro
https://www.readbyqxmd.com/read/29766042/bc-rna-mislocalization-in-the-fragile-x-premutation
#13
Ilham A Muslimov, Taesun Eom, Anna Iacoangeli, Shih-Chieh Chuang, Renate K Hukema, Rob Willemsen, Dimitre G Stefanov, Robert K S Wong, Henri Tiedge
Fragile X premutation disorder is caused by CGG triplet repeat expansions in the 5' untranslated region of FMR1 mRNA. The question of how expanded CGG repeats cause disease is a subject of continuing debate. Our work indicates that CGG-repeat structures compete with regulatory BC1 RNA for access to RNA transport factor hnRNP A2. As a result, BC1 RNA is mislocalized in vivo, as its synapto-dendritic presence is severely diminished in brains of CGG-repeat knock-in animals (a premutation mouse model). Lack of BC1 RNA is known to cause seizure activity and cognitive dysfunction...
March 2018: ENeuro
https://www.readbyqxmd.com/read/29766041/report-on-the-national-eye-institute-s-audacious-goals-initiative-creating-a-cellular-environment-for-neuroregeneration
#14
Marie E Burns, Beth Stevens
The cellular environment of the CNS is non-permissive for growth and regeneration. In the retina, transplantation of stem cells has been limited by inefficient survival and integration into existing circuits. In November 2016, as part of the National Eye Institute's Audacious Goals Initiative (AGI), a diverse collection of investigators gathered for a workshop devoted to articulating the gaps in knowledge, barriers to progress, and ideas for new approaches to understanding cellular environments within the retina and how these environments may be manipulated...
March 2018: ENeuro
https://www.readbyqxmd.com/read/29766040/the-midline-axon-crossing-decision-is-regulated-through-an-activity-dependent-mechanism-by-the-nmda-receptor
#15
Jingxia Gao, Tamara J Stevenson, Adam D Douglass, Joshua P Barrios, Joshua L Bonkowsky
Axon guidance in vertebrates is controlled by genetic cascades as well as by intrinsic activity-dependent refinement of connections. Midline axon crossing is one of the best studied pathfinding models and is fundamental to the establishment of bilaterally symmetric nervous systems. However, it is not known whether crossing requires intrinsic activity in axons, and what controls that activity. Further, a mechanism linking neuronal activity and gene expression has not been identified for axon pathfinding. Using embryonic zebrafish, we found that the NMDA receptor (NMDAR) NR1...
March 2018: ENeuro
https://www.readbyqxmd.com/read/29766039/beneficial-outcome-of-urethane-treatment-following-status-epilepticus-in-a-rat-organophosphorus-toxicity-model
#16
Asheebo Rojas, Wenyi Wang, Avery Glover, Zahra Manji, Yujiao Fu, Raymond Dingledine
The efficacy of benzodiazepines to terminate electrographic status epilepticus (SE) declines the longer a patient is in SE. Therefore, alternative methods for ensuring complete block of SE and refractory SE are necessary. We compared the ability of diazepam and a subanesthetic dose of urethane to terminate prolonged SE and mitigate subsequent pathologies. Adult Sprague Dawley rats were injected with diisopropylfluorophosphate (DFP) to induce SE. Rats were administered diazepam (10 mg/kg, ip) or urethane (0...
March 2018: ENeuro
https://www.readbyqxmd.com/read/29766038/frontal-eye-field-inactivation-reduces-saccade-preparation-in-the-superior-colliculus-but-does-not-alter-how-preparatory-activity-relates-to-saccades-of-a-given-latency
#17
Suryadeep Dash, Tyler R Peel, Stephen G Lomber, Brian D Corneil
A neural correlate for saccadic reaction times (SRTs) in the gap saccade task is the level of low-frequency activity in the intermediate layers of the superior colliculus (iSC) just before visual target onset: greater levels of such preparatory iSC low-frequency activity precede shorter SRTs. The frontal eye fields (FEFs) are one likely source of iSC preparatory activity, since FEF preparatory activity is also inversely related to SRT. To better understand the FEF's role in saccade preparation, and the way in which such preparation relates to SRT, in two male rhesus monkeys, we compared iSC preparatory activity across unilateral reversible cryogenic inactivation of the FEF...
March 2018: ENeuro
https://www.readbyqxmd.com/read/29756027/translatome-regulation-in-neuronal-injury-and-axon-regrowth
#18
Meir Rozenbaum, Marek Rajman, Ida Rishal, Indrek Koppel, Sandip Koley, Katalin F Medzihradszky, Juan A Oses-Prieto, Riki Kawaguchi, Paul S Amieux, Alma L Burlingame, Giovanni Coppola, Mike Fainzilber
Transcriptional events leading to outgrowth of neuronal axons have been intensively studied, but the role of translational regulation in this process is not well understood. Here, we use translatome analyses by ribosome pull-down and protein synthesis characterization by metabolic isotopic labeling to study nerve injury and axon outgrowth proteomes in rodent dorsal root ganglia (DRGs) and sensory neurons. We identify over 1600 gene products that are primarily translationally regulated in DRG neurons after nerve injury, many of which contain a 5'UTR cytosine-enriched regulator of translation (CERT) motif, implicating the translation initiation factor Eif4e in the injury response...
March 2018: ENeuro
https://www.readbyqxmd.com/read/29740596/neuregulin-1-type-i-overexpression-is-associated-with-reduced-nmda-receptor-mediated-synaptic-signaling-in-hippocampal-interneurons-expressing-pv-or-cck
#19
Dimitrios Kotzadimitriou, Wiebke Nissen, Melinda Paizs, Kathryn Newton, Paul J Harrison, Ole Paulsen, Karri Lamsa
Hypofunction of N -methyl-d-aspartate receptors (NMDARs) in inhibitory GABAergic interneurons is implicated in the pathophysiology of schizophrenia (SZ), a heritable disorder with many susceptibility genes. However, it is still unclear how SZ risk genes interfere with NMDAR-mediated synaptic transmission in diverse inhibitory interneuron populations. One putative risk gene is neuregulin 1 ( NRG1 ), which signals via the receptor tyrosine kinase ErbB4, itself a schizophrenia risk gene. The type I isoform of NRG1 shows increased expression in the brain of SZ patients, and ErbB4 is enriched in GABAergic interneurons expressing parvalbumin (PV) or cholecystokinin (CCK)...
March 2018: ENeuro
https://www.readbyqxmd.com/read/29740595/dynamic-encoding-of-incentive-salience-in-the-ventral-pallidum-dependence-on-the-form-of-the-reward-cue
#20
Allison M Ahrens, Lindsay M Ferguson, Terry E Robinson, J Wayne Aldridge
Some rats are especially prone to attribute incentive salience to a cue (conditioned stimulus, CS) paired with food reward (sign-trackers, STs), but the extent they do so varies as a function of the form of the CS. Other rats respond primarily to the predictive value of a cue (goal-trackers, GTs), regardless of its form. Sign-tracking is associated with greater cue-induced activation of mesolimbic structures than goal-tracking; however, it is unclear how the form of the CS itself influences activity in neural systems involved in incentive salience attribution...
March 2018: ENeuro
journal
journal
49667
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"