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https://www.readbyqxmd.com/read/29793042/aminergic-neuromodulation-of-associative-visual-learning-in-harnessed-honey-bees
#1
Nino Mancini, Martin Giurfa, Jean-Christophe Sandoz, Aurore Avarguès-Weber
The honey bee Apis mellifera is a major insect model for studying visual cognition. Free-flying honey bees learn to associate different visual cues with a sucrose reward and may deploy sophisticated cognitive strategies to this end. Yet, the neural bases of these capacities cannot be studied in flying insects. Conversely, immobilized bees are accessible to neurobiological investigation but training them to respond appetitively to visual stimuli paired with sucrose reward is difficult. Here we succeeded in coupling visual conditioning in harnessed bees with pharmacological analyses on the role of octopamine (OA), dopamine (DA) and serotonin (5-HT) in visual learning...
May 21, 2018: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/29792885/effects-of-vasopressin-on-neural-processing-of-infant-crying-in-expectant-fathers
#2
Sandra Thijssen, Anna E Van 't Veer, Jurriaan Witteman, Willemijn M Meijer, Marinus H van IJzendoorn, Marian J Bakermans-Kranenburg
In a randomized, double blind, placebo-controlled, within-subject magnetic resonance imaging study, we examined the effect of 20 IU intranasal vasopressin on the neural processing of infant crying in 25 fathers-to-be. We explored whether familial background modulates vasopressin effects, and whether vasopressin differentially affects cry processing coupled with neutral or emotional contextual information. Participants listened to cries accompanied by neutral ('this is an infant') or emotional ('this infant is sick/bored') contextual information, and neutral control sounds ('this is a saw')...
May 21, 2018: Hormones and Behavior
https://www.readbyqxmd.com/read/29792594/an-nmdar-positive-and-negative-allosteric-modulator-series-share-a-binding-site-and-are-interconverted-by-methyl-groups
#3
Riley Perszyk, Brooke M Katzman, Hirofumi Kusumoto, Steven A Kell, Matthew P Epplin, Yesim A Tahirovic, Rhonda L Moore, David Menaldino, Pieter Burger, Dennis C Liotta, Stephen F Traynelis
N-methyl-d-aspartate receptors (NMDARs) are an important receptor in the brain and have been implicated in multiple neurological disorders. Many non-selective NMDAR-targeting drugs are poorly tolerated, leading to efforts to target NMDAR subtypes to improve the therapeutic index. We describe here a series of negative allosteric NMDAR modulators with submaximal inhibition at saturating concentrations. Modest changes to the chemical structure interconvert negative and positive modulation. All modulators share the ability to enhance agonist potency and are use-dependent, requiring the binding of both agonists before modulators act with high potency...
May 24, 2018: ELife
https://www.readbyqxmd.com/read/29792509/modulation-of-excitability-in-the-temporoparietal-junction-relieves-virtual-reality-sickness
#4
Naoyuki Takeuchi, Takayuki Mori, Yoshimi Suzukamo, Shin-Ichi Izumi
Virtual reality (VR) immersion often provokes subjective discomfort and postural instability, so called VR sickness. The neural mechanism of VR sickness is speculated to be related to visual-vestibular information mismatch and/or postural instability. However, the approaches proposed to relieve VR sickness through modulation of brain activity are poorly understood. Using transcranial direct current stimulation (tDCS), we aimed to investigate whether VR sickness could be relieved by the modulation of cortical excitability in the temporoparietal junction (TPJ), which is known to be involved in processing of both vestibular and visual information...
May 24, 2018: Cyberpsychology, Behavior and Social Networking
https://www.readbyqxmd.com/read/29792190/novel-insights-into-neuroinflammation-bacterial-lipopolysaccharide-tumor-necrosis-factor-%C3%AE-and-ureaplasma-species-differentially-modulate-atypical-chemokine-receptor-3-responses-in-human-brain-microvascular-endothelial-cells
#5
Christine Silwedel, Christian P Speer, Axel Haarmann, Markus Fehrholz, Heike Claus, Mathias Buttmann, Kirsten Glaser
BACKGROUND: Atypical chemokine receptor 3 (ACKR3, synonym CXCR7) is increasingly considered relevant in neuroinflammatory conditions, in which its upregulation contributes to compromised endothelial barrier function and may ultimately allow inflammatory brain injury. While an impact of ACKR3 has been recognized in several neurological autoimmune diseases, neuroinflammation may also result from infectious agents, including Ureaplasma species (spp.). Although commonly regarded as commensals of the adult urogenital tract, Ureaplasma spp...
May 23, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29792024/metabotropic-glutamate-receptors-in-alcohol-use-disorder-physiology-plasticity-and-promising-pharmacotherapies
#6
Max E Joffe, Samuel W Centanni, Anel A Jaramillo, Danny G Winder, P Jeffrey Conn
Developing efficacious treatments for alcohol use disorder (AUD) has proven difficult. The insidious nature of the disease necessitates a deep understanding of its underlying biology as well as innovative approaches to ameliorate ethanol-related pathophysiology. Excessive ethanol-seeking and relapse are generated by long-term changes to membrane properties, synaptic physiology, and plasticity throughout the limbic system and associated brain structures. Each of these factors can be modulated by metabotropic glutamate (mGlu) receptors, a diverse set of G protein-coupled receptors highly expressed throughout the central nervous system...
May 23, 2018: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/29791872/gene-expression-in-cord-blood-links-genetic-risk-for-neurodevelopmental-disorders-with-maternal-psychological-distress-and-adverse-childhood-outcomes
#7
Michael S Breen, Aliza P Wingo, Nastassja Koen, Kirsten A Donald, Mark Nicol, Heather J Zar, Kerry J Ressler, Joseph D Buxbaum, Dan J Stein
Prenatal exposure to maternal stress and depression has been identified as a risk factor for adverse behavioral and neurodevelopmental outcomes in early childhood. However, the molecular mechanisms through which maternal psychopathology shapes offspring development remain poorly understood. We applied transcriptome-wide screens to 149 umbilical cord blood samples from neonates born to mothers with posttraumatic stress disorder (PTSD; n=20), depression (n=31) and PTSD with comorbid depression (n=13), compared to carefully matched trauma exposed controls (n=23) and healthy mothers (n=62)...
May 20, 2018: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29791849/activation-of-entorhinal-cortical-projections-to-the-dentate-gyrus-underlies-social-memory-retrieval
#8
Celeste Leung, Feng Cao, Robin Nguyen, Krutika Joshi, Afif J Aqrabawi, Shuting Xia, Miguel A Cortez, O Carter Snead, Jun Chul Kim, Zhengping Jia
Social interactions are essential to our mental health, and a deficit in social interactions is a hallmark characteristic of numerous brain disorders. Various subregions within the medial temporal lobe have been implicated in social memory, but the underlying mechanisms that tune these neural circuits remain unclear. Here, we demonstrate that optical activation of excitatory entorhinal cortical perforant projections to the dentate gyrus (EC-DG) is necessary and sufficient for social memory retrieval. We further show that inducible disruption of p21-activated kinase (PAK) signaling, a key pathway important for cytoskeletal reorganization, in the EC-DG circuit leads to impairments in synaptic function and social recognition memory, and, importantly, optogenetic activation of the EC-DG terminals reverses the social memory deficits in the transgenic mice...
May 22, 2018: Cell Reports
https://www.readbyqxmd.com/read/29791497/xenin-is-a-novel-anorexigen-in-goldfish-carassius-auratus
#9
Brent Kerbel, Kimberly Badal, Lakshminarasimhan Sundarrajan, Ayelen Blanco, Suraj Unniappan
Xenin, a highly conserved 25 amino acid peptide cleaved from the N-terminus of the coatomer protein alpha (COPA), is emerging as a food intake regulator in mammals and birds. To date, no research has been conducted on xenin biology in fish. This study aims to identify the copa mRNA encoding xenin in goldfish (Carassius auratus) as a model, to elucidate its regulation by feeding, and to describe the role of xenin on appetite. First, a partial sequence of copa cDNA, a region encoding xenin, was identified from goldfish brain...
2018: PloS One
https://www.readbyqxmd.com/read/29791299/spatial-attention-enhances-the-neural-representation-of-invisible-signals-embedded-in-noise
#10
Cooper A Smout, Jason B Mattingley
Recent evidence suggests that voluntary spatial attention can affect neural processing of visual stimuli that do not enter conscious awareness (i.e., invisible stimuli), supporting the notion that attention and awareness are dissociable processes [Wyart, V., Dehaene, S., & Tallon-Baudry, C. Early dissociation between neural signatures of endogenous spatial attention and perceptual awareness during visual masking. Frontiers in Human Neuroscience, 6, 1-14, 2012; Watanabe, M., Cheng, K., Murayama, Y., Ueno, K...
May 23, 2018: Journal of Cognitive Neuroscience
https://www.readbyqxmd.com/read/29791036/neuroplasticity-in-cholinergic-neurons-of-the-laterodorsal-tegmental-nucleus-contributes-to-the-development-of-cocaine-addiction
#11
Katsuyuki Kaneda
The laterodorsal tegmental nucleus (LDT) is a brainstem nucleus that sends cholinergic, glutamatergic, and gamma-aminobutyric acid (GABA)-ergic projections to the ventral tegmental area (VTA), a key brain region associated with reward information processing and reinforcement learning, and thus, with addiction induced by drugs of abuse, including cocaine. Recent studies have revealed that the LDT, in addition to the VTA, plays important roles in the development and expression of cocaine-induced addiction and stress-induced enhancement of addictive behaviors...
May 23, 2018: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29791013/frontline-science-buprenorphine-decreases-ccl2-mediated-migration-of-cd14-cd16-monocytes
#12
Matias Jaureguiberry-Bravo, Lillie Lopez, Joan W Berman
HIV infection of the CNS causes neuroinflammation and damage that contributes to the development of HIV-associated neurocognitive disorders (HAND) in greater than 50% of HIV-infected individuals, despite antiretroviral therapy (ART). Opioid abuse is a major risk factor for HIV infection. It has been shown that opioids can contribute to increased HIV CNS pathogenesis, in part, by modulating the function of immune cells. HIV enters the CNS within two weeks after peripheral infection by transmigration of infected monocytes across the blood brain barrier (BBB)...
May 23, 2018: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/29790931/gsk3%C3%AE-modulates-timing-dependent-long-term-depression-through-direct-phosphorylation-of-kv4-2-channels
#13
Giuseppe Aceto, Agnese Re, Andrea Mattera, Lucia Leone, Claudia Colussi, Marco Rinaudo, Federico Scala, Katia Gironi, Saviana Antonella Barbati, Salvatore Fusco, Thomas Green, Fernanda Laezza, Marcello D'Ascenzo, Claudio Grassi
Spike timing-dependent plasticity (STDP) is a form of activity-dependent remodeling of synaptic strength that underlies memory formation. Despite its key role in dictating learning rules in the brain circuits, the molecular mechanisms mediating STDP are still poorly understood. Here, we show that spike timing-dependent long-term depression (tLTD) and A-type K+ currents are modulated by pharmacological agents affecting the levels of active glycogen-synthase kinase 3 (GSK3) and by GSK3β knockdown in layer 2/3 of the mouse somatosensory cortex...
February 23, 2018: Cerebral Cortex
https://www.readbyqxmd.com/read/29790857/attenuation-correction-for-brain-pet-imaging-using-deep-neural-network-based-on-dixon-and-zte-mr-images
#14
Kuang Gong, Jaewon Yang, Kyungsang Kim, Georges El Fakhri, Youngho Seo, Quanzheng Li
Positron Emission Tomography (PET) is a functional imaging modality widely used in neuroscience studies. To obtain meaningful quantitative results from PET images, attenuation correction is necessary during image reconstruction. For PET/MR hybrid systems, PET attenuation is challenging as Magnetic Resonance (MR) images do not reflect attenuation coefficients directly. To address this issue, we present deep neural network methods to derive the continuous attenuation coefficients for brain PET imaging from MR images...
May 23, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29790724/neuroprotection-in-traumatic-brain-injury
#15
Masoom Desai, Abhi Jain
PURPOSE: Traumatic brain injury has a high incidence worldwide and is associated with significant morbidity and mortality. Moreover, TBI has enduring implications in several domains and limits overall quality of life even in the survivors. Neuroprotective strategies are needed to limit morbidity and mortality associated with this disease process. Insight into the failure of these strategies is required to pursue future research successfully. BACKGROUND: Several different approaches involving pharmacological, surgical and usage of certain devices have been attempted in traumatic brain injury...
May 22, 2018: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/29790420/olfactory-training-in-posttraumatic-smell-impairment-mild-improvement-in-threshold-performances-results-from-a-randomized-controlled-trial
#16
Cristobal Langdon, Eduardo Lehrer, Sara Laxe, Isam Alobid, Llorenç Quinto, Joan Berenguer, Franklin Mariño, Montserrat Bernabeu, Concepcio Marin, Joaquim Mullol
Traumatic Brain Injury (TBI) can be associated with partial or total smell loss. Recent studies have suggested that olfactory outcome can be positively modulated after olfactory training (OT). This study's aim was to investigate OT's potential role in smell recovery after TBI-induced olfactory loss. A prospective, randomized, and controlled study was developed. Patients with TBI-induced olfactory dysfunction (N = 42) were randomized into an experimental group with OT and a control group without (nOT). OT was performed twice daily with a 6-odor training set during 12 weeks...
May 23, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29790360/-current-and-future-pharmacotherapy-of-severe-psychiatric-disorders
#17
Eva Češková
Despite of tremendous development in CNS research, current treatment is suboptimal especially in severe mental disorders. In medicine, there are two main methods of improving the healthcare provided: seeking new treatment procedures and perfecting (optimizing) the existing ones. Optimization of treatment includes not only practical tools such as therapeutic drug monitoring, but also implementation of general trends into the clinical practice. New pharmacological options include drugs aimed at other than monoaminergic systems and old drugs used before the psychopharmacological era...
2018: Casopís Lékar̆ů C̆eských
https://www.readbyqxmd.com/read/29790260/endogenous-glp-1-alters-postprandial-functional-connectivity-between-homeostatic-and-reward-related-brain-regions-involved-in-the-regulation-of-appetite-in-healthy-lean-males-a-pilot-study
#18
Anne Christin Meyer-Gerspach, Huynh Giao Ly, Stefan Borgwardt, Patrick Dupont, Christoph Beglinger, Lukas Van Oudenhove, Bettina K Wölnerhanssen
AIMS: Peripheral infusion of glucagon-like peptide-1 (GLP-1) can affect brain activity in areas involved in the regulation of appetite, including hypothalamic and reward-related brain regions. In contrast, the physiological role of endogenous GLP-1 in the central regulation of appetite has hardly been investigated. MATERIALS AND METHODS: The study was performed as randomized, cross-over trial. Twelve healthy volunteers received an intragastric (ig) glucose (gluc) load with or without intravenous (iv) exendin9-39 (ex9-39; specific GLP-1 receptor antagonist)...
May 22, 2018: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/29789657/the-cooh-terminal-domain-of-huntingtin-interacts-with-rhogef-kalirin-and-modulates-cell-survival
#19
Hollis McClory, Xiaolong Wang, Ellen Sapp, Leah W Gatune, Maria Iuliano, Chiu-Yi Wu, Gina Nathwani, Kimberly B Kegel-Gleason, Marian DiFiglia, Xueyi Li
Human huntingtin (Htt) contains 3144 amino acids and has an expanded polyglutamine region near the NH2 -terminus in patients with Huntington's disease. While numerous binding partners have been identified to NH2 -terminal Htt, fewer proteins are known to interact with C-terminal domains of Htt. Here we report that kalirin, a Rac1 activator, is a binding partner to C-terminal Htt. Kalirin and Htt co-precipitated from mouse brain endosomes and co-localized at puncta in NRK and immortalized striatal cells and primary cortical neurons...
May 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29789605/neuromodulation-of-sensory-networks-in-monkey-brain-by-focused-ultrasound-with-mri-guidance-and-detection
#20
Pai-Feng Yang, M Anthony Phipps, Allen T Newton, Vandiver Chaplin, John C Gore, Charles F Caskey, Li Min Chen
Focused ultrasound (FUS) has gained recognition as a technique for non-invasive neuromodulation with high spatial precision and the ability to both excite and inhibit neural activity. Here we demonstrate that MRI-guided FUS is capable of exciting precise targets within areas 3a/3b in the monkey brain, causing downstream activations in off-target somatosensory and associated brain regions which are simultaneously detected by functional MRI. The similarity between natural tactile stimulation-and FUS- evoked fMRI activation patterns suggests that FUS likely can excite populations of neurons and produce associated spiking activities that may be subsequently transmitted to other functionally related touch regions...
May 22, 2018: Scientific Reports
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