Search results for "MDA"

showing 10 items of 275 documents

Early Social Isolation Stress and Perinatal NMDA Receptor Antagonist Treatment Induce Changes in the Structure and Neurochemistry of Inhibitory Neuro…

2017

AbstractThe exposure to aversive experiences during early life influences brain development and leads to altered behavior. Moreover, the combination of these experiences with subtle alterations in neurodevelopment may contribute to the emergence of psychiatric disorders, such as schizophrenia. Recent hypotheses suggest that imbalances between excitatory and inhibitory (E/I) neurotransmission, especially in the prefrontal cortex and the amygdala, may underlie their etiopathology. In order to understand better the neurobiological bases of these alterations, we studied the impact of altered neurodevelopment and chronic early-life stress on these two brain regions. Transgenic mice displaying fl…

Interneuron3PSA-NCAMsocial isolationSynaptophysinPrefrontal CortexMice TransgenicinterneuronNeurotransmissionInhibitory postsynaptic potentialReceptors N-Methyl-D-AspartateSynaptic TransmissionAmygdalastressNeuroplasticitymedicineAnimalsNeurochemistryPrefrontal cortexNeuronsNeuronal PlasticityGeneral Neuroscience3.1General MedicineNew ResearchAmygdalaschizophreniamedicine.anatomical_structureNMDA receptorDisorders of the Nervous SystemDizocilpine MaleatePsychologyNeuroscienceeneuro
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Intracellular Na+ concentration influences short-term plasticity of glutamate transporter-mediated currents in neocortical astrocytes.

2012

Fast synaptic transmission requires a rapid clearance of the released neurotransmitter from the extracellular space. Glial glutamate transporters (excitatory amino acid transporters, EAATs) strongly contribute to glutamate removal. In this work, we investigated the paired-pulse plasticity of synaptically activated, glutamate transporter-mediated currents (STCs) in cortical layer 2/3 astrocytes. STCs were elicited by local electrical stimulation in layer 4 in the presence of ionotropic glutamate (AMPA and NMDA), GABAA, and GABAB receptor antagonists. In experiments with low [Na+]i (5 mM) intrapipette solution, STCs elicited by paired-pulse stimulation demonstrated paired-pulse facilitation (…

Intracellular FluidPatch-Clamp TechniquesAmino Acid Transport System X-AGBiophysicsNipecotic AcidsAction PotentialsNeocortexAMPA receptorTetrodotoxinBiologyGABAB receptorAnisolesIn Vitro TechniquesSynaptic TransmissionGABA AntagonistsCellular and Molecular NeuroscienceMiceCadmium ChlorideEthers CyclicOximesmedicineGABA transporterAnimalsgamma-Aminobutyric AcidBenzofuransAspartic AcidNeuronal PlasticityGABAA receptorRhodaminesSodiumGlutamate receptorCalcium Channel BlockersElectric StimulationMice Inbred C57BLmedicine.anatomical_structureNeurologyAnimals NewbornAstrocytesExcitatory postsynaptic potentialBiophysicsbiology.proteinNMDA receptorNeuroscienceExcitatory Amino Acid AntagonistsAstrocyteSodium Channel BlockersGlia
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Modulation of NMDA receptor function by cyclic AMP in cerebellar neurones in culture

2004

The signal transduction pathways involved in NMDA receptor modulation by other receptors remain unclear. cAMP could be involved in this modulation. The aim of this work was to analyse the contribution of cAMP to NMDA receptor modulation in cerebellar neurones in culture. Forskolin increases cAMP and results in increased intracellular calcium and cGMP that are prevented by blocking NMDA receptors. Similar effects were induced by two cAMP analogues, indicating that cAMP leads to NMDA receptor activation. It has been reported that phosphorylation of Ser897 of the NR1 subunit of NMDA receptors by cAMP-dependent protein kinase (PKA) activates the receptors. Forskolin increases Ser897 phosphoryla…

Intracellular Fluidmedicine.medical_specialty8-Bromo Cyclic Adenosine MonophosphateBiologyReceptors N-Methyl-D-AspartateBiochemistryCellular and Molecular Neurosciencechemistry.chemical_compoundCerebellumInternal medicineCyclic AMPmedicineAnimalsCyclic adenosine monophosphateNerve Growth FactorsEnzyme InhibitorsPhosphorylationRats WistarProtein kinase AReceptorLong-term depressionCyclic GMPCells CulturedNeuronsNeurotransmitter AgentsForskolinColforsinNeuropeptidesCyclic AMP-Dependent Protein KinasesRatsPituitary adenylate cyclase-activating peptideEndocrinologynervous systemchemistryPituitary Adenylate Cyclase-Activating PolypeptideNMDA receptorCalciumSignal transductionExcitatory Amino Acid AntagonistsSignal TransductionJournal of Neurochemistry
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Pēctrimdas aspekts Ināras Vērzemnieks romānā “Starp dzīvajiem un mirušajiem” un Agates Nesaules romānā “Zudušie saulgrieži"

2022

Maģistra darba mērķis ir izpētīt pēctrimdas fenomenu kā neomītisku konstrukciju Agates Nesaules romānā “Zudušie saulgrieži” (2018) un Ināras Vērzemnieks romānā “Starp dzīvajiem un mirušajiem” (2017). Aplūkots atgriešanās motīvs simboliskā dzimtenē caur ēdienu un dzērienu zīmju sistēmu daiļliteratūras tekstā. Īpaša uzmanība ir veltīta pēctrimdas vēstījumam, kur trimda un pēctrimda kļūst par savdabīgu bināro opozīciju abu darbu struktūrā. Protagonisti ir izraidīti no dzimtenes (centra), lai kādreiz atgrieztos no svešatnes (klejojuma) simboliskās mājās. Kopumā abi prozas darbi aktualizē traumu, nostaļģiju un atmiņas.

Ināra VērzemnieksNeomītismsPēctrimdaFiloloģijaGastropoētikaAgate Nesaule
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Džovanni Paskoli (Giovanni Pascoli), itāliešu lirika

1932

Teksts latviešu valodā ar ietvertiem citātiem itāliešu valodā.

Italian poetry of the 20th century - history and criticismPascoli Giovanni 1855-1912Diplomdarbi:HUMANITIES and RELIGION::Aesthetic subjects::Literature [Research Subject Categories]Itāliešu dzeja 20. gs. - vēsture un kritikaItalian literature - history and criticismItāliešu literatūra
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Skolu ekskursijas, to nozīme un veidi

1927

IzglītībaEkskursijas mācībuDiplomdarbiIzglītība vidējāEducation secondaryAudzināšana skolāSchool field tripsIzglītības metodes:SOCIAL SCIENCES::Social sciences::Education [Research Subject Categories]
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Pedagoģiskās problēmas skolu dzīvē: diplomdarbs

1939

IzglītībaIzglītības sistēmasDiplomdarbiIzglītība vidējāEducation secondaryIzglītības filozofijaEducational systemsPedagoģijas vēsture:SOCIAL SCIENCES::Social sciences::Education [Research Subject Categories]
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Activation of metabotropic glutamate receptors induces propagating network oscillations in the intact cerebral cortex of the newborn mouse.

2006

Activation of metabotropic glutamate receptors (mGluRs) with (1S,3R)-1-aminocyclopentane-1,3-dicarboxylic acid (ACPD) elicited in the frontal or occipital pole of the intact cerebral cortex preparation of the newborn mouse (P0-P3) a transient oscillatory field potential activity in the frequency range of 11-14Hz. These oscillations propagated over the whole cortical hemisphere and were blocked by tetrodotoxin, indicating that action potentials are required for the generation of this activity. Blockade of GABA-A receptors with gabazine did not influence the ACPD-induced network activity, but the glycine antagonist strychnine caused a significant decrease in the frequency, amplitude and durat…

Kainate receptorCholinergic AgonistsReceptors Metabotropic GlutamateCellular and Molecular Neurosciencechemistry.chemical_compoundMiceKynurenic acidmedicineAnimalsLong-term depressionPharmacologyCerebral CortexDose-Response Relationship DrugDioxolanesEnzyme ActivationMice Inbred C57BLchemistryAnimals NewbornMetabotropic glutamate receptorPurinesCNQXGabazineACPDNMDA receptorCarbacholNerve NetNeuroscienceExcitatory Amino Acid Antagonistsmedicine.drugNeuropharmacology
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Latviešu uzņēmējdarbība ASV un Kanādā: atspoguļojums trimdas presē (1949.-1959.g.)

2019

Bakalaura darba mērķis bija izpētīt latviešu uzņēmējdarbības atspoguļojumu latviešu trimdas presē laikā no 1949. gada līdz 1959. gadam, veicot izmantotā materiāla klasificēšanu pēc reģionālajiem (ASV gadījuma) un darbības sektoru principiem (Kanādas gadījumā). Darba izstrādes procesā periodiskajos izdevumos kopumā tika konstatēti 142 latviešu saimnieciskie pasākumi, no tiem 76 bijuši ASV un 66 – Kanādā. Tika noskaidrots, ka gan ASV, gan Kanādā latviešu uzņēmumi līdzīgās proporcijās pārstāvējuši terciāro (pakalpojumi) un sekundāro (rūpniecība un amatniecība) sektoru. Latviešu uzņēmējdarbības intensitāte svešumā norāda uz to, ka latviešu ieceļotāji bijuši svarīgi abu apskatīto valstu saimniec…

KanādauzņēmējdarbībaVēsturetrimdaASV
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Valsts un baznīcas attiecības Itālijā pēc Laterana līgumiem: diplomdarbs

1937

Pielikums: Baznīcas valstij piešķirto īpašumu plāni.

KonkordātsDiplomdarbiVatikānsKatoļu baznīca ItālijāLaterāna līgumsVatikāns - starptautiskās attiecībasBaznīcas valsts attīstībaConcordatPacta Lateranensia:LAW/JURISPRUDENCE::Other law::International law [Research Subject Categories]Starptautiskās attiecībasKatoļu baznīca - diplomātiskās attiecības
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