Search results for "MD"

Nitric oxide enhances Th9 cell differentiation and airway inflammation

2014

International audience; Th9 cells protect hosts against helminthic infection but also mediate allergic disease. Here we show that nitric oxide (NO) promotes Th9 cell polarization of murine and human CD4(+) T cells. NO de-represses the tumour suppressor gene p53 via nitrosylation of Mdm2. NO also increases p53-mediated IL-2 production, STAT5 phosphorylation and IRF4 expression, all essential for Th9 polarization. NO also increases the expression of TGFβR and IL-4R, pivotal to Th9 polarization. OVA-sensitized mice treated with an NO donor developed more severe airway inflammation. Transferred Th9 cells induced airway inflammation, which was exacerbated by NO and blocked by anti-IL-9 antibody.…

Transient oligemia is associated with long-term changes in binding densities of cortical inhibitory GABAA receptors in the rat brain

2009

Recently, we could demonstrate in rats that a short transient oligemic period of only 20-minute duration, induced by systemic hypotension, resulted in a transient decline of spatial memory capacities without any histological damage over a subsequent period of 6 months. In our present study, we checked for more subtle alterations within the highly vulnerable hippocampal CA1 subfield using quantification of neuronal cell density and semi-quantitative analysis of the ischemia-sensitive protein MAP2. Since hippocampal excitatory and inhibitory neurotransmitter receptors are crucially involved in spatial memory processes, quantitative in vitro receptor autoradiography was performed using [(3)H]M…

The effects of nitric oxide on striatal serotoninergic transmission involve multiple targets: an in vivo microdialysis study in the awake rat

2004

Abstract The role of endogenous nitric oxide (NO) in N -methyl- d -aspartate (NMDA)-induced modulation of serotonin (5-HT) release in the striatum of freely moving rats has been studied using microdialysis technique. NMDA-induced increase in 5-HT release was significantly inhibited by selective nitric oxide synthase (nNOS) inhibitor S -methylthiocitrulline (S-Me-TC), ONOO − scavenger l -cysteine ( l -cys), and guanylate cyclase (GC) inhibitor 1 H [1,2,4]oxadiazolo[4,3- a ]quinoxalin-1-one (ODQ). These data suggest that modulation of 5-HT levels is linked to the formation of NO produced by NMDA receptor activation and that endogenously produced NO increases 5-HT concentrations both by stimul…

New tricyclic systems as photosensitizers towards triple negative breast cancer cells.

2022

AbstractNineteen pyrrolo[1,2-h][1,7]naphthyridinones and pyrido[2,3-c]pyrrolo[1,2-a]azepinones were synthesized as new tricyclic systems in which the pyridine ring is annelated to the 6,7-dihydroindolizin-8(5H)-one and 5,6,7,8-tetrahydro-9H-pyrrole[1,2-a]azepine-9-one moieties to obtain potential photosensitizing agents. They were tested for their photoantiproliferative activity on a triple-negative breast cancer cell line, MDA-MB-231, in the dark and under UVA light (2.0 J/cm2). We demonstrated that their toxicity, only when exposed to light, was primarily due to the generation of reactive oxygen species while their photodegradation products were not responsible for their activity. The mos…

Vēsture: Latvijas Universitātes Žurnāls, 2017, Nr.4

2017

Una nuova applicazione della Comparative Multiplex Dosage Analysis (CMDA)

2011

La Comparative Multiplex Dosage Analysis (CMDA) è una tecnica utilizzata per l’analisi di delezioni o duplicazioni di specifiche regioni del genoma (Gable et al. 2003 Hum Mutat 21:379-386). Il metodo si basa su di un’analisi quantitativa delle aree dei picchi di un elettroferogramma ottenuto da elettroforesi capillare condotta su frammenti di DNA amplificati con PCR e marcati con specifici fluorocromi. La presenza di sbilanciamenti è , in particolare, accertata misurando il rapporto tra le aree dei picchi corrispondenti alla regione da analizzare e una regione del genoma la cui dose è nota. In studi precedenti noi abbiamo applicato questa tecnica all’analisi di delezioni e duplicazioni di s…

Pooled analysis of monocyte distribution width in subjects with SARS‐CoV‐2 infection

2021

Die Unterstützung der Eltern beim Fremdsprachenlernen ihres Kindes

2013

Vieraiden kielten oppiminen ei rajoitu pelkästään kouluun ja opettajan järjestämään toimintaan, vaan kieliä opitaan myös muissa yhteyksissä, esim. perheen parissa. Sosiokulttuurinen oppimisteoria, joka toimii tämän pro gradu -tutkielman taustateoriana, painottaa vanhempien ja lapsen välisen vuorovaikutuksen sekä oppijan tekijyyden tärkeyttä oppimisessa. Vanhempien tuesta tehdyt tutkimukset osoittavat, että vanhempien tuki on tärkeää ja hyödyllistä lastensa oppimisessa etenkin motivaation ja koulumenestyksen kannalta. Vanhempien tukea lastensa kielten oppimisessa ei ole Suomessa kuitenkaan tutkittu. Tämän tutkimuksen tavoitteena oli selvittää, miten vanhemmat tukevat 5./6.-luokalla olevien l…

Role of N-methyl-D-aspartate receptors in the long-term effects of repeated social defeat stress on the rewarding and psychomotor properties of cocai…

2019

Abstract Exposure to social stress increases the vulnerability of experimental animals to the rewarding effects of cocaine and it has been suggested that the glutamatergic system could be involved in these effects of stress. The aim of this work is to determine the role of N-methyl- d -aspartate (NMDA) glutamate receptors in the influence of social stress on the conditioned place preference and locomotor sensitization induced by cocaine. Mice treated with saline or NMDA antagonist memantine (5 or 10 mg/kg) underwent repeated social defeat or were kept in the exploration control condition. After three weeks, all groups (SAL + RSD, M5 + RSD, M10 + RSD, SAL + EXP, M5 + EXP and M10 + EXP) were …

Usher syndrome: molecular links of pathogenesis, proteins and pathways.

2006

Contains fulltext : 50437.pdf (Publisher’s version ) (Closed access) Usher syndrome is the most common form of deaf-blindness. The syndrome is both clinically and genetically heterogeneous, and to date, eight causative genes have been identified. The proteins encoded by these genes are part of a dynamic protein complex that is present in hair cells of the inner ear and in photoreceptor cells of the retina. The localization of the Usher proteins and the phenotype in animal models indicate that the Usher protein complex is essential in the morphogenesis of the stereocilia bundle in hair cells and in the calycal processes of photoreceptor cells. In addition, the Usher proteins are important in…