keyword
MENU ▼
Read by QxMD icon Read
search

ventral CA1

keyword
https://www.readbyqxmd.com/read/27922053/electrophysiological-properties-of-ca1-pyramidal-neurons-along-the-longitudinal-axis-of-the-mouse-hippocampus
#1
Giampaolo Milior, Maria Amalia Di Castro, Livio Pepe' Sciarria, Stefano Garofalo, Igor Branchi, Davide Ragozzino, Cristina Limatola, Laura Maggi
Evidence for different physiological properties along the hippocampal longitudinal axis is emerging. Here, we examined the electrophysiological features of neurons at different dorso-ventral sites of the mouse CA1 hippocampal region. Cell position was defined with respect to longitudinal coordinates of each slice. We measured variations in neuronal excitability, subthreshold membrane properties and neurotransmitter responses along the longitudinal axis. We found that (i) pyramidal cells of the dorsal hippocampus (DH) were less excitable than those of the ventral hippocampus (VH)...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27859884/repetition-reveals-ups-and-downs-of-hippocampal-thalamic-and-neocortical-engagement-during-mnemonic-decisions
#2
Zachariah M Reagh, Elizabeth A Murray, Michael A Yassa
The extent to which current information is consistent with past experiences and our capacity to recognize or discriminate accordingly are key factors in flexible memory-guided behavior. Despite a wealth of evidence linking hippocampal and neocortical computations to these phenomena, many important factors remain poorly understood. One such factor is repeated encoding of learned information. In this experiment, participants completed a task in which study stimuli were incidentally encoded either once or three separate times during high-resolution fMRI scanning...
November 16, 2016: Hippocampus
https://www.readbyqxmd.com/read/27857753/serotonin-regulates-brain-derived-neurotrophic-factor-expression-in-select-brain-regions-during-acute-psychological-stress
#3
De-Guo Jiang, Shi-Li Jin, Gong-Ying Li, Qing-Qing Li, Zhi-Ruo Li, Hong-Xia Ma, Chuan-Jun Zhuo, Rong-Huan Jiang, Min-Jie Ye
Previous studies suggest that serotonin (5-HT) might interact with brain-derived neurotrophic factor (BDNF) during the stress response. However, the relationship between 5-HT and BDNF expression under purely psychological stress is unclear. In this study, one hour before psychological stress exposure, the 5-HT1A receptor agonist 8-OH-DPAT or antagonist MDL73005, or the 5-HT2A receptor agonist DOI or antagonist ketanserin were administered to rats exposed to psychological stress. Immunohistochemistry and in situ hybridization revealed that after psychological stress, with the exception of the ventral tegmental area, BDNF protein and mRNA expression levels were higher in the 5-HT1A and the 5-HT2A receptor agonist groups compared with the solvent control no-stress or psychological stress group in the CA1 and CA3 of the hippocampus, prefrontal cortex, central amygdaloid nucleus, dorsomedial hypothalamic nucleus, dentate gyrus, shell of the nucleus accumbens and the midbrain periaqueductal gray...
September 2016: Neural Regeneration Research
https://www.readbyqxmd.com/read/27764670/in-situ-transcription-profiling-of-single-cells-reveals-spatial-organization-of-cells-in-the-mouse-hippocampus
#4
Sheel Shah, Eric Lubeck, Wen Zhou, Long Cai
Identifying the spatial organization of tissues at cellular resolution from single-cell gene expression profiles is essential to understanding biological systems. Using an in situ 3D multiplexed imaging method, seqFISH, we identify unique transcriptional states by quantifying and clustering up to 249 genes in 16,958 cells to examine whether the hippocampus is organized into transcriptionally distinct subregions. We identified distinct layers in the dentate gyrus corresponding to the granule cell layer and the subgranular zone and, contrary to previous reports, discovered that distinct subregions within the CA1 and CA3 are composed of unique combinations of cells in different transcriptional states...
October 19, 2016: Neuron
https://www.readbyqxmd.com/read/27733611/reward-expectancy-strengthens-ca1-theta-and-beta-band-synchronization-and-hippocampal-ventral-striatal-coupling
#5
Carien S Lansink, Guido T Meijer, Jan V Lankelma, Martin A Vinck, Jadin C Jackson, Cyriel M A Pennartz
: The use of information from the hippocampal memory system in motivated behavior depends on its communication with the ventral striatum. When an animal encounters cues that signal subsequent reward, its reward expectancy is raised. It is unknown, however, how this process affects hippocampal dynamics and their influence on target structures, such as ventral striatum. We show that, in rats, reward-predictive cues result in enhanced hippocampal theta and beta band rhythmic activity during subsequent action, compared with uncued goal-directed navigation...
October 12, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27708103/ventral-ca1-neurons-store-social-memory
#6
Teruhiro Okuyama, Takashi Kitamura, Dheeraj S Roy, Shigeyoshi Itohara, Susumu Tonegawa
The medial temporal lobe, including the hippocampus, has been implicated in social memory. However, it remains unknown which parts of these brain regions and their circuits hold social memory. Here, we show that ventral hippocampal CA1 (vCA1) neurons of a mouse and their projections to nucleus accumbens (NAc) shell play a necessary and sufficient role in social memory. Both the proportion of activated vCA1 cells and the strength and stability of the responding cells are greater in response to a familiar mouse than to a previously unencountered mouse...
September 30, 2016: Science
https://www.readbyqxmd.com/read/27650481/theta-burst-stimulation-induced-ltp-differences-and-similarities-between-the-dorsal-and-ventral-ca1-hippocampal-synapses
#7
Stylianos Kouvaros, Costas Papatheodoropoulos
The hippocampal synapses display a conspicuous ability for long-term plasticity, which is thought to contribute to learning and memory. Previous research has shown that long-term potentiation (LTP) greatly differs between the dorsal (DH) and ventral (VH) CA1 hippocampal synapses when induced by high-frequency stimulation. In this study, using rat hippocampal slices and more physiologically relevant activity patterns based on the frequency of the theta rhythm (i.e., theta-burst stimulation, TBS) we found that the DH compared with the VH displayed a higher ability for induction and stability of NMDA receptor-dependent LTP of the field excitatory postsynaptic potential...
December 2016: Hippocampus
https://www.readbyqxmd.com/read/27602521/locus-coeruleus-and-dopaminergic-consolidation-of-everyday-memory
#8
Tomonori Takeuchi, Adrian J Duszkiewicz, Alex Sonneborn, Patrick A Spooner, Miwako Yamasaki, Masahiko Watanabe, Caroline C Smith, Guillén Fernández, Karl Deisseroth, Robert W Greene, Richard G M Morris
The retention of episodic-like memory is enhanced, in humans and animals, when something novel happens shortly before or after encoding. Using an everyday memory task in mice, we sought the neurons mediating this dopamine-dependent novelty effect, previously thought to originate exclusively from the tyrosine-hydroxylase-expressing (TH(+)) neurons in the ventral tegmental area. Here we report that neuronal firing in the locus coeruleus is especially sensitive to environmental novelty, locus coeruleus TH(+) neurons project more profusely than ventral tegmental area TH(+) neurons to the hippocampus, optogenetic activation of locus coeruleus TH(+) neurons mimics the novelty effect, and this novelty-associated memory enhancement is unaffected by ventral tegmental area inactivation...
September 7, 2016: Nature
https://www.readbyqxmd.com/read/27569580/sex-related-dimorphism-in-dentate-gyrus-atrophy-and-behavioral-phenotypes-in-an-inducible-tta-appsi-transgenic-model-of-alzheimer-s-disease
#9
Tatiana Melnikova, DaMin Park, Lauren Becker, Deidre Lee, Eugenia Cho, Nuzhat Sayyida, Jing Tian, Karen Bandeen-Roche, David R Borchelt, Alena V Savonenko
Sex differences are a well-known phenomenon in Alzheimer's disease (AD), with women having a higher risk for AD than men. Many AD mouse models display a similar sex-dependent pattern, with females showing earlier cognitive deficits and more severe neuropathology than males. However, whether those differences are relevant to human disease is unclear. Here we show that in AD mouse models that overexpress amyloid precursor protein (APP) under control of the prion protein promoter (PrP), female transgenic mice have higher APP expression than males, complicating interpretations of the role of sex-related factors in such models...
August 26, 2016: Neurobiology of Disease
https://www.readbyqxmd.com/read/27569181/regional-specific-modulation-of-neuronal-activation-associated-with-nitric-oxide-synthase-inhibitors-in-an-animal-model-of-antidepressant-activity
#10
Eoin Sherwin, Valentina Gigliucci, Andrew Harkin
OBJECTIVE: The regional specific modulation of neuronal activation following drug administration is of interest to determine brain areas involved in the behavioural effects of experimental test compounds. In the current investigation the effects of the L-arginine related NOS inhibitor N(ω)-l-nitroarginine (L-NA) and the structurally unrelated selective neuronal NOS inhibitor 1-(2-Trifluoro-methyl-phenyl) imidazole (TRIM) were assessed in the rat for changes in regional c-FOS immunoreactivity, a marker of neuronal activation, upon exposure to the forced swimming test (FST)...
January 1, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/27531836/high-frequency-stimulation-induced-synaptic-potentiation-in-dorsal-and-ventral-ca1-hippocampal-synapses-the-involvement-of-nmda-receptors-mglur5-and-l-type-voltage-gated-calcium-channels
#11
Costas Papatheodoropoulos, Stylianos Kouvaros
The ability of the ventral hippocampus (VH) for long-lasting long-term potentiation (LTP) and the mechanisms underlying its lower ability for short-lasting LTP compared with the dorsal hippocampus (DH) are unknown. Using recordings of field excitatory postsynaptic potentials (EPSPs) from the CA1 field of adult rat hippocampal slices, we found that 200-Hz stimulation induced nondecremental LTP that was maintained for at least 7 h and was greater in the DH than in the VH. The interaction of NMDA receptors with L-type voltage-dependent calcium channels appeared to be more effective in the DH than in the VH...
September 2016: Learning & Memory
https://www.readbyqxmd.com/read/27411738/opposite-monosynaptic-scaling-of-blp-vca1-inputs-governs-hopefulness-and-helplessness-modulated-spatial-learning-and-memory
#12
Ying Yang, Zhi-Hao Wang, Sen Jin, Di Gao, Nan Liu, Shan-Ping Chen, Sinan Zhang, Qing Liu, Enjie Liu, Xin Wang, Xiao Liang, Pengfei Wei, Xiaoguang Li, Yin Li, Chenyu Yue, Hong-Lian Li, Ya-Li Wang, Qun Wang, Dan Ke, Qingguo Xie, Fuqiang Xu, Liping Wang, Jian-Zhi Wang
Different emotional states lead to distinct behavioural consequences even when faced with the same challenging events. Emotions affect learning and memory capacities, but the underlying neurobiological mechanisms remain elusive. Here we establish models of learned helplessness (LHL) and learned hopefulness (LHF) by exposing animals to inescapable foot shocks or with anticipated avoidance trainings. The LHF animals show spatial memory potentiation with excitatory monosynaptic upscaling between posterior basolateral amygdale (BLP) and ventral hippocampal CA1 (vCA1), whereas the LHL show memory deficits with an attenuated BLP-vCA1 connection...
2016: Nature Communications
https://www.readbyqxmd.com/read/27339393/phosphodiesterase-11a-pde11a-enriched-in-ventral-hippocampus-neurons-is-required-for-consolidation-of-social-but-not-nonsocial-memories-in-mice
#13
Shweta Hegde, Will R Capell, Baher A Ibrahim, Jennifer Klett, Neema S Patel, Alexander T Sougiannis, Michy P Kelly
The capacity to form long-lasting social memories is critical to our health and survival. cAMP signaling in the ventral hippocampal formation (VHIPP) appears to be required for social memory formation, but the phosphodiesterase (PDE) involved remains unknown. Previously, we showed that PDE11A, which degrades cAMP and cGMP, is preferentially expressed in CA1 and subiculum of the VHIPP. Here, we determine whether PDE11A is expressed in neurons where it could directly influence synaptic plasticity and whether expression is required for the consolidation and/or retrieval of social memories...
November 2016: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/27294197/nmda-receptors-on-dopaminoceptive-neurons-are-essential-for-drug-induced-conditioned-place-preference
#14
Magdalena Sikora, Krzysztof Tokarski, Bartosz Bobula, Joanna Zajdel, Kamila Jastrzębska, Przemysław Eligiusz Cieślak, Magdalena Zygmunt, Joanna Sowa, Magdalena Smutek, Katarzyna Kamińska, Krystyna Gołembiowska, David Engblom, Grzegorz Hess, Ryszard Przewlocki, Jan Rodriguez Parkitna
Plasticity of the brain's dopamine system plays a crucial role in adaptive behavior by regulating appetitive motivation and the control of reinforcement learning. In this study, we investigated drug- and natural-reward conditioned behaviors in a mouse model in which the NMDA receptor-dependent plasticity of dopaminoceptive neurons was disrupted. We generated a transgenic mouse line with inducible selective inactivation of the NR1 subunit in neurons expressing dopamine D1 receptors (the NR1(D1CreERT2) mice)...
May 2016: ENeuro
https://www.readbyqxmd.com/read/27282087/reduced-response-to-chronic-mild-stress-in-pacap-mutant-mice-is-associated-with-blunted-fosb-expression-in-limbic-forebrain-and-brainstem-centers
#15
Viktória Kormos, László Gáspár, László Á Kovács, József Farkas, Tamás Gaszner, Valér Csernus, András Balogh, Hitoshi Hashimoto, Dóra Reglődi, Zsuzsanna Helyes, Balázs Gaszner
Pituitary adenylate cyclase-activating polypeptide (PACAP) has been implicated in stress adaptation with potential relevance in mood disorder management. PACAP deficient (KO) mice on CD1 background were shown to have depression-like phenotype. Here we aimed at investigating effects of chronic variable mild stress (CVMS) in non-injected, vehicle and imipramine-treated KO mice vs. wildtype (WT) counterparts. We hypothesized reduced FosB neuronal activity in stress-related centers, altered activity and peptide/neurotransmitter content of corticotropin-releasing factor (CRF) cells of the oval (ovBST) bed nucleus of stria terminalis (BST), urocortin 1 (Ucn1) neurons of centrally projecting Edinger-Westphal nucleus (cpEW) and serotonin (5HT) cells of dorsal raphe (DR) in PACAP deficiency...
August 25, 2016: Neuroscience
https://www.readbyqxmd.com/read/27132084/time-dependent-co-relation-of-bdnf-and-creb-mrnas-in-adult-rat-brains-following-acute-psychological-stress-in-the-communication-box-paradigm
#16
Gongying Li, Yanmei Wang, Min Yan, Hongxia Ma, Yanjie Gao, Zexuan Li, Changqi Li, Hongjun Tian, Chuanjun Zhuo
Psychological stress affects human health, and chronic stress leads to life-threatening diseases, such as depression and post-traumatic stress disorder. Psychological stress coping mechanisms involve the brain-derived neurotrophic factor (BDNF) and downstream cAMP response element binding protein (CREB), which are targets of the adverse effects of stress paradigms. Fourty-seven adult male Sprague-Dawley rats were divided into control, physical stress and six psychological stress groups which were assayed at 0h, 0...
June 15, 2016: Neuroscience Letters
https://www.readbyqxmd.com/read/27118833/memory-retrieval-of-inhibitory-avoidance-requires-histamine-h1-receptor-activation-in-the-hippocampus
#17
Roberta Fabbri, Cristiane Regina Guerino Furini, Maria Beatrice Passani, Gustavo Provensi, Elisabetta Baldi, Corrado Bucherelli, Ivan Izquierdo, Jociane de Carvalho Myskiw, Patrizio Blandina
Retrieval represents a dynamic process that may require neuromodulatory signaling. Here, we report that the integrity of the brain histaminergic system is necessary for retrieval of inhibitory avoidance (IA) memory, because rats depleted of histamine through lateral ventricle injections of α-fluoromethylhistidine (a-FMHis), a suicide inhibitor of histidine decarboxylase, displayed impaired IA memory when tested 2 d after training. a-FMHis was administered 24 h after training, when IA memory trace was already formed...
May 10, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27113915/hipposeq-a-comprehensive-rna-seq-database-of-gene-expression-in-hippocampal-principal-neurons
#18
Mark S Cembrowski, Lihua Wang, Ken Sugino, Brenda C Shields, Nelson Spruston
Clarifying gene expression in narrowly defined neuronal populations can provide insight into cellular identity, computation, and functionality. Here, we used next-generation RNA sequencing (RNA-seq) to produce a quantitative, whole genome characterization of gene expression for the major excitatory neuronal classes of the hippocampus; namely, granule cells and mossy cells of the dentate gyrus, and pyramidal cells of areas CA3, CA2, and CA1. Moreover, for the canonical cell classes of the trisynaptic loop, we profiled transcriptomes at both dorsal and ventral poles, producing a cell-class- and region-specific transcriptional description for these populations...
2016: ELife
https://www.readbyqxmd.com/read/27021097/corticosterone-induces-rapid-increase-in-the-amplitude-of-inhibitory-response-in-hippocampal-synapses-with-asynchronous-gaba-release
#19
E P Volkova, A V Rozov, G G Nadareishvili, A P Bol'shakov
Experiments were performed on cultured slices of rat ventral hippocampus. Using extracellular stimulation and patch clamp recording from pyramidal neurons in the hippocampal CA1 area, we studied characteristics of GABAergic synapse formed on these neurons by cholecystokinin-expressing interneurons. This synapse was characterized by asynchronous release of GABA and depolarization-induced suppression of inhibitory response. It was observed that administration of corticosterone increased the amplitude of evoked inhibitory postsynaptic currents in 5 minutes, but the paired ratio did not significantly change...
March 2016: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/26969669/effects-of-dopamine-and-serotonin-systems-on-modulating-neural-oscillations-in-hippocampus-prefrontal-cortex-pathway-in-rats
#20
Xiaxia Xu, Chenguang Zheng, Lei An, Rubin Wang, Tao Zhang
Theta and gamma oscillations are believed to play an important role in cognition and memory, and their phase coupling facilitates the information transmission in hippocampal-cortex network. In a rat model of chronic stress, the phase coupling of both theta and gamma oscillations between ventral hippocampal CA1 (vCA1) and medial prefrontal cortex (mPFC) was found to be disrupted, which was associated with the impaired synaptic plasticity in the pathway. However, little was known about the mechanisms underlying the process...
July 2016: Brain Topography
keyword
keyword
100284
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"