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Hippocampus and relational binding

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https://www.readbyqxmd.com/read/29670659/beneficial-effects-of-gagam-palmultang-on-scopolamine-induced-memory-deficits-in-mice
#1
Yu Ri Kim, Min Young Kwon, Malk Eun Pak, So Hyun Park, Jin Ung Baek, Byung Tae Choi
From text mining of Dongeuibogam, the 7 herbs in Palmultang can be considered effective candidates for memory enhancement. We sought to determine whether Gagam-Palmultang, comprising these 7 herbs, ameliorates scopolamine-induced memory impairment in mice, by focusing on the central cholinergic system and memory-related signaling molecules. Behavioral tests were performed after inducing memory impairment by scopolamine administration. The cholinergic system activity and memory-related molecules were examined in the hippocampus by enzyme-linked immunosorbent, western blot, and immunofluorescence assays...
2018: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29660975/synergistic-effects-of-psychosocial-stress-and-mild-peripheral-infection-on-inducing-microglial-activation-in-the-hippocampal-dentate-gyrus-and-long-lasting-deficits-in-hippocampus-related-memory
#2
Wen-Yu Tzeng, Chien-Chou Su, Li-Han Sun, Chianfang G. Cherng, Lung Yu
Lipopolysaccharide (LPS) treatment and stress may cause immune activation in the brain, an event which has been thought to play a role in mediating stress-induced cognitive dysfunction. However, the enduring impact of psychosocial stress on brain immune activation or cognitive deficits has not been well investigated. Likewise, it remains unexplored whether there exist synergistic effects of psychosocial stress and a weak systemic LPS treatment on brain immune activation and/or cognitive function. In this work, a 10-day social defeat regimen was used to model psychosocial stress and the number and density of ionized calcium-binding adaptor molecule 1 (Iba1)-stained microglia was used to reveal brain immune activation in male Balb/C mice...
April 17, 2018: Chinese Journal of Physiology
https://www.readbyqxmd.com/read/29660444/ca-2-binding-protein-1-regulates-hippocampal-dependent-memory-and-synaptic-plasticity
#3
Tian Yang, Jeremiah K Britt, Coral J Cintrón-Pérez, Edwin Vázquez-Rosa, Kevin V Tobin, Grant Stalker, Jason Hardie, Rebecca J Taugher, John Wemmie, Andrew A Pieper, Amy Lee
Ca2+ binding protein 1 (CaBP1) is a Ca2+ sensing protein similar to calmodulin that potently regulates voltage-gated Ca2+ channels. Unlike calmodulin, however, CaBP1 is mainly expressed in neuronal cell-types and enriched in the hippocampus, where its function is unknown. Here, we investigated the role of CaBP1 in hippocampal-dependent behaviors using mice lacking expression of CaBP1 (C-KO). By western blot, the largest CaBP1 splice variant, caldendrin, was detected in hippocampal lysates from wild-type (WT) but not C-KO mice...
April 13, 2018: Neuroscience
https://www.readbyqxmd.com/read/29660440/the-long-term-effect-of-maternal-dietary-protein-restriction-on-5-ht-1a-receptor-function-and-behavioral-responses-to-stress-in-adulthood
#4
Wenrui Ye, Michael Duffy Pitlock, Martin A Javors, Brent Thompson, James D Lechleiter, Julie G Hensler
Maternal nutrition impacts fetal development, and may play a role in determining resilience to stress and vulnerability to stress-precipitated psychiatric disorders, such as anxiety and depression. In this study, we examined the effect of a reduction in maternal dietary protein during pregnancy on the brain neurochemistry and behavior of offspring. We focused specifically on the serotonin system, the 5-HT1A receptor and the responsivity of offspring as adults to stress. Dams were fed either a low protein diet (10% protein by weight) or isocaloric control diet (20% protein by weight)...
April 13, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29626125/age-related-change-in-5-ht6-receptor-availability-in-healthy-male-volunteers-measured-with-11-c-gsk215083-pet
#5
Rajiv Radhakrishnan, Nabeel Nabulsi, Edward Gaiser, Jean-Dominique Gallezot, Shannan Henry, Beata Planeta, Shu-Fei Lin, Jim Ropchan, Wendol Williams, Evan Morris, Deepak Cyril D'Souza, Yiyun Huang, Richard E Carson, David Matuskey
Introduction: The serotonin receptor 6 (5-HT6) is a potential therapeutic target for central nervous system (CNS) disorders given its near exclusive localization in the CNS and distribution in regions that are important in depression, anxiety and cognition. This study sought to investigate the effects of age on 5-HT6 receptor availability using 11 C GSK215083, a PET ligand with affinity for 5-HT6 in the striatum and 5-HT2A in the cortex. Methods: Twenty eight healthy male subjects (age range: 23-52 years) were scanned with 11 C-GSK215083 on the HR+ PET scanner...
April 6, 2018: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29617377/inositol-1-4-5-trisphosphate-3-kinase-a-overexpressed-in-mouse-forebrain-modulates-synaptic-transmission-and-mglur-ltd-of-ca1-pyramidal-neurons
#6
Byungil Choi, Hyun Woo Lee, Seojung Mo, Jin Yong Kim, Hyun Wook Kim, Im Joo Rhyu, Eunhwa Hong, Yeon Kyung Lee, June-Seek Choi, Chong-Hyun Kim, Hyun Kim
Inositol 1,4,5-trisphosphate 3-kinase A (IP3K-A) regulates the level of the inositol polyphosphates, inositol trisphosphate (IP3) and inositol tetrakisphosphate to modulate cellular signaling and intracellular calcium homeostasis in the central nervous system. IP3K-A binds to F-actin in an activity-dependent manner and accumulates in dendritic spines, where it is involved in the regulation of synaptic plasticity. IP3K-A knockout mice exhibit deficits in some forms of hippocampus-dependent learning and synaptic plasticity, such as long-term potentiation in the dentate gyrus synapses of the hippocampus...
2018: PloS One
https://www.readbyqxmd.com/read/29614677/18f-flortaucipir-binding-in-choroid-plexus-related-to-race-and-hippocampus-signal
#7
Christopher M Lee, Heidi I L Jacobs, Marta Marquié, John A Becker, Nicolas V Andrea, David S Jin, Aaron P Schultz, Matthew P Frosch, Teresa Gómez-Isla, Reisa A Sperling, Keith A Johnson
BACKGROUND: On target 18F-Flortaucipir (FTP) binding of Alzheimer's disease tau aggregates and off-target binding of melanocytes have been demonstrated with autoradiography. OBJECTIVE: We aimed to investigate the hypothesis that if binding in choroid plexus (CP) is due to melanocytes, the signal would be elevated in Black/African American (B/AA) compared to White (W) participants. In addition, we examined whether CP signal affects measurements in adjacent regions, and whether correcting for spill-in effects has an influence on associations between hippocampus (HC) FTP and amyloid or cognition...
2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29604409/hippocampal-gene-expression-profiling-in-a-rat-model-of-functional-constipation-reveals-abnormal-expression-genes-associated-with-cognitive-function
#8
Ying Li, Lei Shi, Ling Yue, Rui Gao, Zheng Qiang Yu, Xiao Hang Yang, Li Liu, Hui Zheng
Disease progress and pathological proceeding of functional gastrointestinal disorder (FGID) are considered to be closely related to disordered brain-gut interaction, but only a few researches reported the relationship of functional constipation (FC) and disordered brain-gut interaction. It has been found that FC has a great correlation with emotional problems in clinical patients, but its related mechanisms have not been clearly clarified. In order to explore the molecular pathogenesis of FC related to emotional problem, BGI-500 sequencing technology was used for the first time to study the transcriptomics changes of hippocampus in a rat model...
March 28, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29593508/gabaergic-control-of-nigrostriatal-and-mesolimbic-dopamine-in-the-rat-brain
#9
Susanne Nikolaus, Hans-Jörg Wittsack, Markus Beu, Christina Antke, Maria A De Souza Silva, Frijthof Wickrath, Anja Müller-Lutz, Joseph P Huston, Gerald Antoch, Hans-Wilhelm Müller, Hubertus Hautzel
Purpose: The present study assessed the effects of the GABAA receptor (R) agonist muscimol (MUS), and the GABAA R antagonist bicuculline (BIC) on neocortical and subcortical radioligand binding to dopamine D2/3 Rs in relation to motor and exploratory behaviors in the rat. Methods: D2/3 R binding was measured with small animal SPECT in baseline and after challenge with either 1 mg/kg MUS or 1 mg/kg BIC, using [123 I]IBZM as radioligand. Motor/exploratory behaviors were assessed for 30 min in an open field prior to radioligand administration...
2018: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/29576796/-apocynum-venetum-leaf-extract-exerts-antidepressant-like-effects-and-inhibits-hippocampal-and-cortical-apoptosis-of-rats-exposed-to-chronic-unpredictable-mild-stress
#10
Ting Wu, Xiangting Li, Tingting Li, Min Cai, Zhonghai Yu, Jingsi Zhang, Zhennian Zhang, Wen Zhang, Jun Xiang, Dingfang Cai
We investigated the effects of Apocynum venetum leaf extract (AVLE) on depressive behaviors and neuronal apoptosis in a chronic unpredictable mild stress (CUMS) rat model of depression. Rats were randomly divided into six groups: control, chronic unpredictable mild stress, fluoxetine, AVLE30, AVLE60, and AVLE120. Except for the control group, all rats were submitted to chronic unpredictable mild stress paradigms for four weeks to induce depressive behavior. Neuronal apoptosis was assessed by the terminal deoxynucleotidyl transferase- (TDT-) mediated dUTP-biotin nick end-labeling (TUNEL) method...
2018: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29576706/rhynchophylline-downregulates-phosphorylated-camp-response-element-binding-protein-nuclear-receptor-related-1-and-brain-derived-neurotrophic-factor-expression-in-the-hippocampus-of-ketamine-induced-conditioned-place-preference-rats
#11
Youli Guo, Chaohua Luo, Genghong Tu, Chan Li, Yi Liu, Wei Liu, Ken Kin Lam Yung, Zhixian Mo
Background: Addiction to ketamine is becoming a serious public health issues, for which there exists no effective treatment. Rhynchophylline (Rhy) is an alkaloid extracted from certain Uncaria species that is well known for both its potent anti-addictive and neuroprotective properties. Increasing evidence supports the contributions of cAMP response element binding protein (CREB), nuclear receptor-related-1 (Nurr1), and brain-derived neurotrophic factor (BDNF) in modulating neural and behavioral plasticity which was induced by addictive drugs...
January 2018: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29564531/shaker-related-voltage-gated-potassium-channels-kv1-in-human-hippocampus
#12
Michael Willis, Irmgard Leitner, Klaus Seppi, Maria Trieb, Georg Wietzorrek, Josef Marksteiner, Hans-Günther Knaus
In this study, we investigated the tissue expression levels, alpha subunit composition and distribution of Shaker-related voltage-dependent potassium Kv1 channels in human hippocampus by combining western blotting experiments, toxin autoradiography, in vivo radioligand binding studies, immunoprecipitation and immunohistochemistry. Tissue expression of Kv1.1 and Kv1.2 α-subunits in human post-mortem brain tissue was confirmed in immunoblot analysis using a panel of specific monoclonal and polyclonal antibodies...
March 21, 2018: Brain Structure & Function
https://www.readbyqxmd.com/read/29560312/relationship-between-muscarinic-m-1-receptor-binding-and-cognition-in-medication-free-subjects-with-psychosis
#13
Geor Bakker, Claudia Vingerhoets, Daphne Boucherie, Matthan Caan, Oswald Bloemen, Jos Eersels, Jan Booij, Thérèse van Amelsvoort
Background: It is still unclear which underlying mechanisms are involved in cognitive deficits of psychotic disorders. Pro-cognitive effects of muscarinic M1 receptor agonists suggest alterations in M1 receptor functioning may modulate these symptoms. Post mortem studies in patients with schizophrenia have shown significantly reduced M1 receptor expression rates in the dorsolateral prefrontal cortex (DLPFC) compared to controls. To date no in-vivo examinations of M1 receptor binding in relation to cognitive impairments have been done...
2018: NeuroImage: Clinical
https://www.readbyqxmd.com/read/29554302/ventral-striatal-d2-3-receptor-availability-is-associated-with-impulsive-choice-behavior-as-well-aslimbic-corticostriatal-connectivity
#14
Rebecca L Barlow, Martin Gorges, Alfie Wearn, Heiko G Niessen, Jan Kassubek, Jeffrey W Dalley, Anton Pekcec
Background: Low dopamine D2/3 receptor availability in the nucleus accumbens (NAcb) shell is associated with highly-impulsive behavior in rats, as measured by premature responses in a cued attentional task. However, it is unclear whether dopamine D2/3 receptor availability in the NAcb is equally linked to intolerance for delayed rewards, a related form of impulsivity. Methods: We investigated the relationship between D2/3 receptor availability in the NAcb and impulsivity in a delay-discounting task (DDT) where animals must choose between immediate small-magnitude rewards and delayed larger-magnitude rewards...
March 15, 2018: International Journal of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29544725/neural-measures-associated-with-configural-threat-acquisition
#15
Daniel M Stout, Daniel E Glenn, Dean T Acheson, Andrea D Spadoni, Victoria B Risbrough, Alan N Simmons
Contextual threat learning reflects two often competing processes: configural and elemental learning. Configural threat learning is a hippocampal-dependent process of forming a conjunctive representation of a context through binding of several multi-modal elements. In contrast, elemental threat-learning is governed by the amygdala and involves forming associative relationships between individual features within the context. Contextual learning tasks in humans however, rarely probe if a learned fear response is truly due to configural learning vs...
March 12, 2018: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/29541577/-18-f-fallypride-characterization-of-striatal-and-extrastriatal-d-2-3-receptors-in-parkinson-s-disease
#16
Adam J Stark, Christopher T Smith, Kalen J Petersen, Paula Trujillo, Nelleke C van Wouwe, Manus J Donahue, Robert M Kessler, Ariel Y Deutch, David H Zald, Daniel O Claassen
Parkinson's disease (PD) is characterized by widespread degeneration of monoaminergic (especially dopaminergic) networks, manifesting with a number of both motor and non-motor symptoms. Regional alterations to dopamine D2/3 receptors in PD patients are documented in striatal and some extrastriatal areas, and medications that target D2/3 receptors can improve motor and non-motor symptoms. However, data regarding the combined pattern of D2/3 receptor binding in both striatal and extrastriatal regions in PD are limited...
2018: NeuroImage: Clinical
https://www.readbyqxmd.com/read/29541052/relationships-between-serotonin-transporter-binding-in-the-raphe-nuclei-basal-ganglia-and-hippocampus-with-clinical-symptoms-in-cervical-dystonia-a-11-c-dasb-positron-emission-tomography-study
#17
Marenka Smit, David Vállez García, Bauke M de Jong, Evelien Zoons, Jan Booij, Rudi A Dierckx, Antoon T Willemsen, Erik F de Vries, Anna L Bartels, Marina A Tijssen
Purpose: Alterations of the central serotonergic system have been implicated in the pathophysiology of dystonia. In this molecular imaging study, we assessed whether altered presynaptic serotonin transporter (SERT) binding contributes to the pathophysiology of cervical dystonia (CD), concerning both motor and non-motor symptoms (NMS). Methods: We assessed the non-displaceable binding potential (BPND ) using the selective SERT tracer [11 C]DASB and positron emission tomography (PET) in 14 CD patients and 12 age- and gender-matched controls...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29496988/glutamatergic-biomarkers-for-cocaine-addiction-a-longitudinal-study-in-self-administering-rats-using-mrs-and-mglur5-pet
#18
Bart de Laat, Akila Weerasekera, Gil Leurquin-Sterk, Guy M Bormans, Uwe Himmelreich, Cindy Casteels, Koen Van Laere
Cocaine addiction is a disorder without diagnostic biomarkers or effective pharmacotherapy. Research on the glutamatergic system lacks longitudinal data starting before exposure to cocaine. We present findings in a rat model of cocaine self-administration that was followed-up longitudinally using the mGluR5 tracer18 F-FPEB PET, 1H-MRS and behavioral tests. Methods: Forty-two Wistar rats were scanned with18 F-FPEB PET and 1H-MRS before and after sucrose or IV cocaine self-administration, during withdrawal and relapse...
March 1, 2018: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29488342/pge2-ep3-signaling-exacerbates-hippocampus-dependent-cognitive-impairment-after-laparotomy-by-reducing-expression-levels-of-hippocampal-synaptic-plasticity-related-proteins-in-aged-mice
#19
Jing-Yu Xiao, Bing-Rui Xiong, Wen Zhang, Wen-Chang Zhou, Hui Yang, Feng Gao, Hong-Bing Xiang, Anne Manyande, Xue-Bi Tian, Yu-Ke Tian
AIM: Multifactors contribute to the development of postoperative cognitive dysfunction (POCD), of which the most important mechanism is neuroinflammation. Prostaglandin E2 (PGE2) is a key neuroinflammatory molecule and could modulate hippocampal synaptic transmission and plasticity. This study was designed to investigate whether PGE2 and its receptors signaling pathway were involved in the pathophysiology of POCD. METHODS: Sixteen-month old male C57BL/6J mice were exposed to laparotomy...
February 27, 2018: CNS Neuroscience & Therapeutics
https://www.readbyqxmd.com/read/29481626/developmental-lead-exposure-and-prenatal-stress-result-in-sex-specific-reprograming-of-adult-stress-physiology-and-epigenetic-profiles-in-brain
#20
Marissa Sobolewski, Garima Varma, Beth Adams, David W Anderson, Jay S Schneider, Deborah A Cory-Slechta
Developmental exposure to lead (Pb) and prenatal stress (PS) both impair cognition, which could derive from their joint targeting of the hypothalamic-pituitary-adrenal (HPA) axis and the brain mesocorticolimbic (MESO) system, including frontal cortex (FC) and hippocampus (HIPP). Glucocorticoids modulate both FC and HIPP function and associated mediation of cognitive and other behavioral functions. The present study sought to determine whether developmental Pb±PS exposures altered glucocorticoid-related epigenetic profiles in brain MESO regions in offspring of female mice exposed to 0 or 100 ppm Pb acetate drinking water from 2 mos prior to breeding until weaning, with half further exposed to prenatal restraint stress from gestational day 11-18...
February 21, 2018: Toxicological Sciences: An Official Journal of the Society of Toxicology
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