Search results for "PTO"
showing 10 items of 28599 documents
Metformīna efekti uz uzvedību un glikozes homeostāzes traucējumiem Alcheimera slimības tipa modeļdzīvniekos
2019
Alcheimera slimība ir hroniska neirodeģeneratīva slimība, kas raksturojas ar progresējošu kognitīvo funkciju pavājināšanos. Šī darba mērķis bija noskaidrot metformīna efektus uz telpisko iemācīšanos un atmiņu žurku Alcheimera slimības modelī, kā arī noteikt metformīna ietekmi uz GLUT3 un GSK-3 ekspresiju šo dzīvnieku smadzeņu garozā un hipokampā. Ūdens labirinta testa rezultāti uzrādīja, ka metformīns uzlabo mācīšanās spējas un atmiņu Alcheimera slimības modeļa žurkām. Ar Western blot noskaidroja, ka metfromīns (75 vai 100 mg/kg) normalizē GLUT3 un GSK-3 ekspresiju žurku smadzeņu garozā un hipokampā pēc streptozocīna ievadīšanas līdz kontroles līmenim. Metformīns varētu būt efektīvs līdzekl…
Intranazāla metformīna efekti uz sporādiskās Alcheimera slimības tipa modeļa žurku telpisko atmiņu un neironu izdzīvošanu
2022
Alcheimera slimība ir visbiežāk sastopamā neirodeģeneratīvā saslimšana, kad lēni un pakāpeniski notiek neokortikāla smadzeņu šūnu atrofija, kas izpaužas kā kognīcijas pasliktināšanās. Balstoties uz glikozes metabolisma transporta izmaiņām Alcheimera slimības gadījumā, tiek pētītas vielas, piemēram, metformīns, kas spēj uzlabot insulīna sensitivitāti un mazināt neiroiekaisuma attīstību. Pētījuma rezultāti norāda, ka intranazāli ievadīts metformīns uzlabo intracerebroventrikulāri ievadīta neirotoksīna streptozocīna izraisīto telpiskās atmiņas un apmācīšanās pasliktināšanos žurkām Morisa ūdens labirinta testā, kā arī palielina dzīvotspējīgo neironu skaitu un samazina piknotisko neironu skaitu …
Consequences of analgesics use in early pregnancy: Results of tests on mice.
2019
International audience; Self-medication during pregnancy continues to be an issue in developing countries due topoor medical education. The most commonly used drugs are analgesics, mainlyacetaminophen (paracetamol, APAP) and, to a lesser extent, ketoprofen (KPF). The aim of thestudy was to establish whether there are consequences of accidental use of these two drugsduring early embryogenesis. The experimental study was performed on 30 pregnant whitemice, divided into three groups: a first group to which APAP was administered, a secondgroup to which KPF was administered, and group 3 as a control group. At delivery, the babymice were examined, and after their first parturition, they were take…
FUNCTIONAL GENOMIC APPROACHES TO ELUCIDATE BIOTIC AND ABIOTIC STRESS RESPONSES IN PLANTS
The vesicular transfer of CLIC1 from glioblastoma to microvascular endothelial cells requires TRPM7.
2018
Chloride intracellular channel 1 (CLIC1) is highly expressed and secreted by human glioblastoma cells and cell lines such as U87, initiating cell migration and tumor growth. Here, we examined whether CLIC1 could be transferred to human primary microvascular endothelial cells (HMEC). We previously reported that the oncogenic microRNA, miR-5096, increased the release of extracellular vesicles (EVs) by which it increased its own transfer from U87 to surrounding cells. Thus, we also examined its effect on the CLIC1 transfer. In homotypic cultures, miR-5096 did not increase the expression of CLIC1 in U87 nor in HMEC. However, the endothelial CLIC1 level increased after exposure to EVs released b…
Identification and characterization of the grapevine flagellin receptor vvfls2
2014
International audience
Predicting stiffness and strength of birch pulp:Polylactic acid composites
2016
This paper studies failure of birch pulp–polylactic acid composites. Stiffness and strength are calculated using the theory of short fibre composites and the results are compared to experimental data. The results differed from the experimental values by 0–6%. With less aligned fibres the short fibre theory is not feasible. The performance of the 40 wt% birch pulp – polylactic acid composite is predicted with X-ray microtomography based finite element modelling, and the results are compared with experiments. Stiffness results differed from experiments by 1–17% . By adding into the models a third material phase representing the interface between the fibres and the matrix, the stress–strain c…
Izmaiņas neironu mielinizācijas un apoptozes procesos eksperimentāla išēmiska insulta subakūtajā stadijā
2021
Viens no galvenajiem nāves cēloņiem pasaulē ir išēmisks insults. Tā akūtā stadijā novēro apoptozi, programmēto neironu nāvi, kā arī to mielinizācijas traucējumus. Taču trūkst dati par to, vai šie patoloģiskie procesi notiek arī išēmiska insulta subakūtajās stadijās. Šī darba mērķis bija noskaidrot filamenta izraisītas vidējās smadzeņu artērijas oklūzijas (fMCAo) efektus uz apoptozē un neironu mielinizācijā iesaistīto proteīnu (kaspāzes-3 un mielīna bāzes proteīna) ekspresiju kontroles un išēmiska insulta modeļdzīvnieku smadzenēs subakūtā stadijā pēc fMCAo. Rezultāti parāda, ka 2 mēnešus pēc fMCAo išēmiska insulta modeļdzīvnieku išēmijas serdes un penumbra zonā būtiski samazinājusies neironu…
Tuberculosis among Migrant Populations in Sicily: A Field Report
2021
Background. In the EU, tuberculosis (TB) mainly affects vulnerable people, including migrants. From 2014 to 2017, we have estimated the frequency of both tuberculosis and latent tuberculosis infection (LTBI) among the migrant population hosted in 41 reception centers in western Sicily (ITaCA network). Materials and Methods. All migrants were consecutively recruited for the screening of TB infection with physical examination and TST in 1,020 migrants and with IGRA in the others 2,690. The screening was carried out 4–8 weeks after landing in Sicily. For all migrants with a positive screening test, chest X-ray and smear examination were performed. LTBI was defined by positivity of TST or IGRA …
Single Event Transients and Pulse Quenching Effects in Bandgap Reference Topologies for Space Applications
2016
An architectural performance comparison of bandgap voltage reference variants, designed in a $0.18~\mu \text {m}$ CMOS process, is performed with respect to single event transients. These are commonly induced in microelectronics in the space radiation environment. Heavy ion tests (Silicon, Krypton, Xenon) are used to explore the analog single-event transients and have revealed pulse quenching mechanisms in analogue circuits. The different topologies are compared, in terms of cross-section, pulse duration and pulse amplitude. The measured results, and the explanations behind the findings, reveal important guidelines for designing analog integrated circuits, which are intended for space appli…