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Arc and memory

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https://www.readbyqxmd.com/read/29328922/a-viral-arc-hive-for-metazoan-memory
#1
Nicholas F Parrish, Keizo Tomonaga
Arc, a master regulator of synaptic plasticity, contains sequence elements that are evolutionarily related to retrotransposon Gag genes. Two related papers in this issue of Cell show that Arc retains retroviral-like capsid-forming ability and can transmit mRNA between cells in the nervous system, a process that may be important for synaptic function.
January 11, 2018: Cell
https://www.readbyqxmd.com/read/29326059/differential-requirement-of-de-novo-arc-protein-synthesis-in-the-insular-cortex-and-the-amygdala-for-safe-and-aversive-taste-long-term-memory-formation
#2
Guzmán-Ramos Kioko, Venkataraman Archana, Morin Jean-Pascal, Osorio-Gómez Daniel, Bermúdez-Rattoni Federico
Several immediate early genes products are known to be involved in the facilitation of structural and functional modifications at distinct synapses activated through experience. The IEG-encoded protein Arc (activity regulated cytoskeletal-associated protein) has been widely implicated in long-term memory formation and stabilization. In this study, we sought to evaluate a possible role for de novo Arc protein synthesis in the insular cortex (IC) and in the amygdala (AMY) during long-term taste memory formation...
January 8, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29302037/author-correction-a-chip-integrated-coherent-photonic-phononic-memory
#3
Moritz Merklein, Birgit Stiller, Khu Vu, Stephen J Madden, Benjamin J Eggleton
The original version of this Article omitted the Acknowledgements section:"This work was sponsored by the Australian Research Council (ARC) Laureate Fellowship (FL120100029) and the Centre of Excellence program (CUDOS CE110001010). We acknowledge the support of the ANFF ACT."This has now been corrected in both the PDF and HTML versions of the Article.
January 4, 2018: Nature Communications
https://www.readbyqxmd.com/read/29232477/behavior-driven-arc-expression-is-reduced-in-all-ventral-hippocampal-subfields-compared-to-ca1-ca3-and-dentate-gyrus-in-rat-dorsal-hippocampus
#4
M K Chawla, V L Sutherland, K Olson, B L McNaughton, C A Barnes
Anatomical connectivity and lesion studies reveal distinct functional heterogeneity along the dorsal-ventral axis of the hippocampus. The immediate early gene Arc is known to be involved in neural plasticity and memory and can be used as a marker for cell activity that occurs, for example, when hippocampal place cells fire. We report here, that Arc is expressed in a greater proportion of cells in dorsal CA1, CA3 and dentate gyrus (DG), following spatial behavioral experiences compared to ventral hippocampal subregions (dorsal CA1= 33%; ventral CA1= 13%; dorsal CA3 = 23%; ventral CA3 = 8%; and dorsal DG = 2...
December 12, 2017: Hippocampus
https://www.readbyqxmd.com/read/29222058/differential-expression-of-the-immediate-early-genes-c-fos-arc-egr-1-and-npas4-during-long-term-memory-formation-in-the-context-preexposure-facilitation-effect-cpfe
#5
Nicholas A Heroux, Brittany F Osborne, Lauren A Miller, Malak Kawan, Katelyn N Buban, Jeffrey B Rosen, Mark E Stanton
No abstract text is available yet for this article.
December 5, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/29208638/the-diphenylpyrazole-compound-anle138b-blocks-a%C3%AE-channels-and-rescues-disease-phenotypes-in-a-mouse-model-for-amyloid-pathology
#6
Ana Martinez Hernandez, Hendrik Urbanke, Alan L Gillman, Joon Lee, Sergey Ryazanov, Hope Y Agbemenyah, Eva Benito, Gaurav Jain, Lalit Kaurani, Gayane Grigorian, Andrei Leonov, Nasrollah Rezaei-Ghaleh, Petra Wilken, Fernando Teran Arce, Jens Wagner, Martin Fuhrman, Mario Caruana, Angelique Camilleri, Neville Vassallo, Markus Zweckstetter, Roland Benz, Armin Giese, Anja Schneider, Martin Korte, Ratnesh Lal, Christian Griesinger, Gregor Eichele, Andre Fischer
Alzheimer's disease is a devastating neurodegenerative disease eventually leading to dementia. An effective treatment does not yet exist. Here we show that oral application of the compound anle138b restores hippocampal synaptic and transcriptional plasticity as well as spatial memory in a mouse model for Alzheimer's disease, when given orally before or after the onset of pathology. At the mechanistic level, we provide evidence that anle138b blocks the activity of conducting Aβ pores without changing the membrane embedded Aβ-oligomer structure...
December 5, 2017: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/29163022/the-insula-and-taste-learning
#7
REVIEW
Adonis Yiannakas, Kobi Rosenblum
The sense of taste is a key component of the sensory machinery, enabling the evaluation of both the safety as well as forming associations regarding the nutritional value of ingestible substances. Indicative of the salience of the modality, taste conditioning can be achieved in rodents upon a single pairing of a tastant with a chemical stimulus inducing malaise. This robust associative learning paradigm has been heavily linked with activity within the insular cortex (IC), among other regions, such as the amygdala and medial prefrontal cortex...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/29162813/chemogenomic-analysis-reveals-key-role-for-lysine-acetylation-in-regulating-arc-stability
#8
Jasmin Lalonde, Surya A Reis, Sudhir Sivakumaran, Carl S Holland, Hendrik Wesseling, John F Sauld, Begum Alural, Wen-Ning Zhao, Judith A Steen, Stephen J Haggarty
The role of Arc in synaptic plasticity and memory consolidation has been investigated for many years with recent evidence that defects in the expression or activity of this immediate-early gene may also contribute to the pathophysiology of brain disorders including schizophrenia and fragile X syndrome. These results bring forward the concept that reversing Arc abnormalities could provide an avenue to improve cognitive or neurological impairments in different disease contexts, but how to achieve this therapeutic objective has remained elusive...
November 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/29142056/familiarity-with-a-vocal-category-biases-the-compartmental-expression-of-arc-arg3-1-in-core-auditory-cortex
#9
Tamara N Ivanova, Christina Gross, Rudolph C Mappus, Yong Jun Kwon, Gary J Bassell, Robert C Liu
Learning to recognize a stimulus category requires experience with its many natural variations. However, the mechanisms that allow a category's sensorineural representation to be updated after experiencing new exemplars are not well understood, particularly at the molecular level. Here we investigate how a natural vocal category induces expression in the auditory system of a key synaptic plasticity effector immediate early gene, Arc/Arg3.1, which is required for memory consolidation. We use the ultrasonic communication system between mouse pups and adult females to study whether prior familiarity with pup vocalizations alters how Arc is engaged in the core auditory cortex after playback of novel exemplars from the pup vocal category...
December 2017: Learning & Memory
https://www.readbyqxmd.com/read/29135807/effects-of-stressor-controllability-on-transcriptional-levels-of-c-fos-arc-and-brain-derived-neurotrophic-factor-in-mouse-amygdala-and-medial-prefrontal-cortex
#10
Mayumi Machida, György Lonart, Larry D Sanford
Controllability is an important factor in determining stress outcomes. Uncontrollable stress is associated with the development of psychopathology such as post-traumatic stress disorder, whereas controllable stress is associated with adaptive stress responses and positive outcomes. In this study, we investigated how controllability affects poststress neurobiology by assessing transcriptional levels of activity-dependent genes in medial prefrontal cortex (mPFC) and amygdala, regions important in mediating stress outcomes...
November 13, 2017: Neuroreport
https://www.readbyqxmd.com/read/29074343/different-doses-of-sevoflurane-facilitate-and-impair-learning-and-memory-function-through-activation-of-the-erk-pathway-and-synthesis-of-arc-protein-in-the-rat-hippocampus
#11
Qian-Lin Zhu, Yan Luo, Qing-Sheng Xue, Fu-Jun Zhang, Bu-Wei Yu
BACKGROUND: Sevoflurane has been shown to stimulate or depress memory in adult rats; however, the cellular mechanism of this bidirectional effect has not been fully investigated. METHODS: We used an intra-hippocampal microinfusion of U0126 to suppress ERK activation. Male SD rats were randomly assigned to four groups: Sham, 0.11% SEV, 0.3% SEV and 0.3%+U0126. They received bilateral injections of U0126 or saline. Rats were anesthetized, and Inhibitory Avoidance (IA) training was performed immediately after anesthesia...
October 23, 2017: Brain Research
https://www.readbyqxmd.com/read/29069077/functional-convergence-of-histone-methyltransferases-ehmt1-and-kmt2c-involved-in-intellectual-disability-and-autism-spectrum-disorder
#12
Tom S Koemans, Tjitske Kleefstra, Melissa C Chubak, Max H Stone, Margot R F Reijnders, Sonja de Munnik, Marjolein H Willemsen, Michaela Fenckova, Connie T R M Stumpel, Levinus A Bok, Margarita Sifuentes Saenz, Kyna A Byerly, Linda B Baughn, Alexander P A Stegmann, Rolph Pfundt, Huiqing Zhou, Hans van Bokhoven, Annette Schenck, Jamie M Kramer
Kleefstra syndrome, caused by haploinsufficiency of euchromatin histone methyltransferase 1 (EHMT1), is characterized by intellectual disability (ID), autism spectrum disorder (ASD), characteristic facial dysmorphisms, and other variable clinical features. In addition to EHMT1 mutations, de novo variants were reported in four additional genes (MBD5, SMARCB1, NR1I3, and KMT2C), in single individuals with clinical characteristics overlapping Kleefstra syndrome. Here, we present a novel cohort of five patients with de novo loss of function mutations affecting the histone methyltransferase KMT2C...
October 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28979192/arc-interacts-with-the-integral-endoplasmic-reticulum-protein-calnexin
#13
Craig Myrum, Jonathan Soulé, Margarethe Bittins, Kyle Cavagnini, Kevin Goff, Silje K Ziemek, Maria S Eriksen, Sudarshan Patil, Adrian Szum, Rajeevkumar R Nair, Clive R Bramham
Activity-regulated cytoskeleton-associated protein, Arc, is a major regulator of long-term synaptic plasticity and memory formation. Here we reveal a novel interaction partner of Arc, a resident endoplasmic reticulum transmembrane protein, calnexin. We show an interaction between recombinantly-expressed GST-tagged Arc and endogenous calnexin in HEK293, SH-SY5Y neuroblastoma and PC12 cells. The interaction was dependent on the central linker region of the Arc protein that is also required for endocytosis of AMPA-type glutamate receptors...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28963515/somatic-arc-protein-expression-in-hippocampal-granule-cells-is-increased-in-response-to-environmental-change-but-independent-of-task-specific-learning
#14
J P Cleland, E F Willis, P F Bartlett, J Vukovic
Activated neurons express immediate-early genes, such as Arc. Expression of Arc in the hippocampal granule cell layer, an area crucial for spatial learning and memory, is increased during acquisition of spatial learning; however, it is unclear whether this effect is related to the task-specific learning process or to nonspecific aspects of the testing procedure (e.g. exposure to the testing apparatus and exploration of the environment). Herein, we show that Arc-positive cells numbers are increased to the same extent in the granule cell layer after both acquisition of a single spatial learning event in the active place avoidance task and exploration of the testing environment, as compared to naïve (i...
September 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28943393/regulation-of-spine-structural-plasticity-by-arc-arg3-1
#15
REVIEW
Thomas M Newpher, Scott Harris, Jasmine Pringle, Colleen Hamilton, Scott Soderling
Dendritic spines are actin-rich, postsynaptic protrusions that contact presynaptic terminals to form excitatory chemical synapses. These synaptic contacts are widely believed to be the sites of memory formation and information storage, and changes in spine shape are thought to underlie several forms of learning-related plasticity. Both membrane trafficking pathways and the actin cytoskeleton drive activity-dependent structural and functional changes in dendritic spines. A key molecular player in regulating these processes is the activity-regulated cytoskeleton-associated protein (Arc), a protein that has diverse roles in expression of synaptic plasticity...
September 21, 2017: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/28939038/inverse-synaptic-tagging-an-inactive-synapse-specific-mechanism-to-capture-activity-induced-arc-arg3-1-and-to-locally-regulate-spatial-distribution-of-synaptic-weights
#16
REVIEW
Hiroyuki Okuno, Keiichiro Minatohara, Haruhiko Bito
Long-lasting forms of synaptic plasticity such as long-term potentiation (LTP) and long-term depression (LTD) are fundamental cellular mechanisms underlying learning and memory. The synaptic tagging and capture (STC) hypothesis has provided a theoretical framework on how products of activity-dependent genes may interact with potentiated synapses to facilitate and maintain such long-lasting synaptic plasticity. Although Arc/arg3.1 was initially assumed to participate in STC processes during LTP, accumulating evidence indicated that Arc/arg3...
September 22, 2017: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/28938523/hypothermia-induced-by-anesthesia-regulates-various-signals-expressions-in-the-hippocampus-of-animals
#17
Huimei Hao, Shanshan Wang
Though important for a variety of medical procedures, general anesthesia is not a problem free. Some anesthetics have been suggested to affect a number of signals, which are associated with memory consolidation and cognition. In the present study, we attempted to investigate the molecular mechanism of anesthesia-regulated processes. We found that under hypothermic condition, anesthetic of isoflurane enhances various signals expression in hippocampus, including Hspd1, Actb, Mgst1, THBS4, Syp, C1QC, Serpine, Plat, and Ngf, which were related to cellular stress, neural plasticity responses, and hippocampal injury...
November 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28918435/infant-avoidance-training-alters-cellular-activation-patterns-in-prefronto-limbic-circuits-during-adult-avoidance-learning-ii-cellular-imaging-of-neurons-expressing-the-activity-regulated-cytoskeleton-associated-protein-arc-arg3-1
#18
Nicole Gröger, Anja Mannewitz, Jörg Bock, Susann Becker, Katja Guttmann, Gerd Poeggel, Katharina Braun
Positive and negative feedback learning is essential to optimize behavioral performance. We used the two-way active avoidance (TWA) task as an experimental paradigm for negative feedback learning with the aim to test the hypothesis that neuronal ensembles activate the activity-regulated cytoskeletal (Arc/Arg3.1) protein during different phases of avoidance learning and during retrieval. A variety of studies in humans and other animals revealed that the ability of aversive feedback learning emerges postnatally...
September 16, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28899881/tet1-overexpression-leads-to-anxiety-like-behavior-and-enhanced-fear-memories-via-the-activation-of-calcium-dependent-cascade-through-egr1-expression-in-mice
#19
Wookbong Kwon, Hyeng-Soo Kim, Jain Jeong, Yonghun Sung, Minjee Choi, Song Park, Jinhee Lee, Soyoung Jang, Sung Hyun Kim, Sanggyu Lee, Myoung Ok Kim, Zae Young Ryoo
Ten-eleven translocation methylcytosine dioxygenase 1 (Tet1) initiates DNA demethylation by converting 5-methylcytosine (5-mC) to 5-hydroxymethylcytosine (5-hmC) at CpG-rich regions of genes, which have key roles in adult neurogenesis and memory. In addition, the overexpression of Tet1 with 5-hmC alteration in patients with psychosis has also been reported, for instance in schizophrenia and bipolar disorders. The mechanism underlying Tet1 overexpression in the brain; however, is still elusive. In the present study, we found that Tet1-transgenic (Tet1-TG) mice displayed abnormal behaviors involving elevated anxiety and enhanced fear memories...
September 12, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28899869/autism-like-behavior-caused-by-deletion-of-vaccinia-related-kinase-3-is-improved-by-trkb-stimulation
#20
Myung-Su Kang, Tae-Yong Choi, Hye Guk Ryu, Dohyun Lee, Seung-Hyun Lee, Se-Young Choi, Kyong-Tai Kim
Vaccinia-related kinases (VRKs) are multifaceted serine/threonine kinases that play essential roles in various aspects of cell signaling, cell cycle progression, apoptosis, and neuronal development and differentiation. However, the neuronal function of VRK3 is still unknown despite its etiological potential in human autism spectrum disorder (ASD). Here, we report that VRK3-deficient mice exhibit typical symptoms of autism-like behavior, including hyperactivity, stereotyped behaviors, reduced social interaction, and impaired context-dependent spatial memory...
October 2, 2017: Journal of Experimental Medicine
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