Search results for " Kai"
showing 10 items of 107 documents
Pragmatiniai predikatinių bendraties konstrukcijų aspektai latvių kalboje
2020
Šio straipsnio tikslas – ištirti pragmatinius predikatinės bendraties konstrukcijos latvių kalboje aspektus ir įrodyti, kad šios konstrukcijos turi specifinius pragmatinius ženklus. Priešingai nei tokie pragmatiniai ženklai kaip dalelytės, jungtukai, prieveiksmiai ar prozodija, predikatinės bendraties konstrukcijos latvių kalboje pragmatiškai funkcionuoja kaip atskiras vienetas, t. y., struktūrinis funkcionalumas kyla iš sąsajos, o ne iš atskirų leksinių ar gramatinių elementų. Šios konstrukcijos latvių kalboje žymi marginalinį modalumą, o jų vartojimas yra susijęs su neutraliais, pažymėtais kalbos registrais. Taigi straipsnyje pagrindinis dėmesys skiriamas modalinėms ir laikinoms reikšmėms…
The Lithuanian "have" - resultative - a typological curiosum?
2012
ABSTRACT Björn Wiemer. The Lithuanian HAVE-resultative - A Typological Curiosum? Lingua Posnaniensis, vol. LIV (2)/2012. The Poznań Society for the Advancement of the Arts and Sciences. PL ISSN 0079-4740, ISBN 978-83-7654-252-2, pp. 69-81. This article presents the Lithuanian possessive resultative construction with the verb turėti ‘have’ and discusses its place in a typology of forms of resultative constructions. While possessive resultatives with a past passive participle (as in Polish Kolację mamy już przygotowaną lit. ‘We have the dinner already prepared’) are found in areally related as well as other languages, Lithuanian stands out in using an active participle (more precisely: a part…
Bruce/apollon promotes hippocampal neuron survival and is downregulated by kainic acid
2005
Prolonged or excess stimulation of excitatory amino acid receptors leads to seizures and the induction of excitotoxic nerve cell injury. Kainic acid acting on glutamate receptors produces degeneration of vulnerable neurons in parts of the hippocampus and amygdala, but the exact mechanisms are not fully understood. We have here investigated whether the anti-apoptotic protein Bruce is involved in kainic acid-induced neurodegeneration. In the rat hippocampus and cortex, Bruce was exclusively expressed by neurons. The levels of Bruce were rapidly downregulated by kainic acid in hippocampal neurons as shown both in vivo and in cell culture. Caspase-3 was activated in neurons exhibiting low level…
Neural overexcitation and implication of NMDA and AMPA receptors in a mouse model of temporal lobe epilepsy implying zinc chelation.
2006
Summary: Purpose: Zinc chelation with diethyldithiocarbamate (DEDTC) during nondamaging kainic acid administration enhances excitotoxicity to the level of cell damage. The objective of this work was to study the developing of the lesion in this model of temporal lobe epilepsy and the implications of the different types of glutamate receptors. Methods: The antagonist of the N-methyl-d-aspartate (NMDA) receptor MK-801, and the antagonist of the α-amino-3-hydroxy-5-methyl-4-isoxazolepropionate (AMPA) receptor GYKI52466, were used concomitantly with intraperitoneal administration of kainic acid (15 mg/kg) followed by DEDTC (150 mg/kg) in mouse. The animals were killed at different times from 4 …
Involvement of cyclin-dependent kinase-5 in the kainic acid-mediated degeneration of glutamatergic synapses in the rat hippocampus.
2011
Increased levels of glutamate causing excitotoxic damage accompany neurological disorders such as ischemia/stroke, epilepsy and some neurodegenerative diseases. Cyclin-dependent kinase-5 (Cdk5) is important for synaptic plasticity and is deregulated in neurodegenerative diseases. However, the mechanisms by which kainic acid (KA)-induced excitotoxic damage involves Cdk5 in neuronal injury are not fully understood. In this work, we have thus studied involvement of Cdk5 in the KA-mediated degeneration of glutamatergic synapses in the rat hippocampus. KA induced degeneration of mossy fiber synapses and decreased glutamate receptor (GluR)6/7 and post-synaptic density protein 95 (PSD95) levels in…
Molecular and functional interactions between tumor necrosis factor-alpha receptors and the glutamatergic system in the mouse hippocampus: Implicatio…
2009
Tumor necrosis factor (TNF)-alpha is a proinflammatory cytokine acting on two distinct receptor subtypes, namely p55 and p75 receptors. TNF-alpha p55 and p75 receptor knockout mice were previously shown to display a decreased or enhanced susceptibility to seizures, respectively, suggesting intrinsic modifications in neuronal excitability. We investigated whether alterations in glutamate system function occur in these naive knockout mice with perturbed cytokine signaling that could explain their different propensity to develop seizures. Using Western blot analysis of hippocampal homogenates, we found that p55(-/-) mice have decreased levels of membrane GluR3 and NR1 glutamate receptor subuni…
Identification of calcium sensing receptor (CaSR) mRNA-expressing cells in normal and injured rat brain
2009
Calcium sensing receptor (CaSR), isolated for the first time from bovine and human parathyroid, is a G-protein-coupled receptors that has been involved in diverse physiological functions. At present a complete in vivo work on the identification of CaSR mRNA-expressing cells in the adult brain lacks and this investigation was undertaken in order to acquire more information on cell type expressing CaSR mRNA in the rat brain and to analyse for the first time its expression in different experimental models of brain injury. The expression of CaSR mRNAs was found mainly in scattered cells throughout almost all the brain regions. A double labeling analysis showed a colocalization of CaSR mRNA expr…
Pharmacological activity of C10-substituted analogs of the high-affinity kainate receptor agonist dysiherbaine
2009
Kainate receptor antagonists have potential as therapeutic agents in a number of neuropathologies. Synthetic modification of the convulsant marine toxin neodysiherbaine A (NDH) previously yielded molecules with a diverse set of pharmacological actions on kainate receptors. Here we characterize three new synthetic analogs of NDH that contain substituents at the C10 position in the pyran ring of the marine toxin. The analogs exhibited high-affinity binding to the GluK1 (GluR5) subunit and lower affinity binding to GluK2 (GluR6) and GluK3 (GluR7) subunits in radioligand displacement assays with recombinant kainate and AMPA receptors. As well, the natural toxin NDH exhibited approximately 100-f…
Full Domain Closure of the Ligand-binding Core of the Ionotropic Glutamate Receptor iGluR5 Induced by the High Affinity Agonist Dysiherbaine and the …
2009
The prevailing structural model for ligand activation of ionotropic glutamate receptors posits that agonist efficacy arises from the stability and magnitude of induced domain closure in the ligand-binding core structure. Here we describe an exception to the correlation between ligand efficacy and domain closure. A weakly efficacious partial agonist of very low potency for homomeric iGluR5 kainate receptors, 8,9-dideoxyneodysiherbaine (MSVIII-19), induced a fully closed iGluR5 ligand-binding core. The degree of relative domain closure, approximately 30 degrees , was similar to that we resolved with the structurally related high affinity agonist dysiherbaine and to that of l-glutamate. The ph…
Morālā kaitējuma kompensācija kriminālprocesā
2022
Saskaņā ar Kriminālprocesa likuma 22. pantu, cietušajam tiek garantētas tiesības, noziedzīga nodarījuma gadījumos, iespēja morālās kompensācijas pieprasīšanai un saņemšanai. Globalizācijas apstākļos, ir pieaugoša tendence uz visaptverošu unifikāciju, kas ietekmē visas valstis kopā un katru valsti atsevišķi. Bakalaura darba mērķis ir izpētīt un analizēt morālās kaitējuma jēdzienu, morālā kaitējuma kompensācijas apmēra noteikšanu krimināltiesībās un tiesisko regulējumu Latvijā. Lai darba mērķi sasniegtu, veikts salīdzinājumu par morālās kompensācijas apmēra noteikšanas mehānismiem Latvijā un citās Eiropas valstīs. Veikts Latvijas un ārvalstu normatīvo regulējumu analīze, tiesu prakses un judi…