Search results for "Erk"

Der Begriff der Urteilskraft bei Kant

1906

Teori i praksis - praksis i teori. GLU-studenters refleksjoner om fag og didaktikk

2017

De siste tiars forskning, samfunnsdebatt og politikkutforming knyttet til skolesektoren har vaert preget av diskusjoner om hva det egentlig innebaerer a vaere en kompetent laerer, og hvordan de to laeringsarenaene i laererutdanningene – teoriarenaen og praksisarenaen – best kan utfylle hverandre for a utdanne kompetente laerere. I denne artikkelen presenterer vi resultatene fra en undersokelse blant grunnskolelaererstudenter pa en utdanningsinstitusjons grunnskolelaererutdanning for 1.–7. trinn. I undersokelsen har vi rettet blikket mot studentenes opplevelser av laererrollen og av sammenhengen mellom teoriarenaen og praksisarenaen. Dette har vi gjort i tilknytning til ett spesifikt undervi…

Zvaigžņotā Debess: 2006, Vasara

2006

Latvijas Zinātnes padome, Latvijas Universitāte

Mycobacterium tuberculosis rezistences pret antibakteriālajiem līdzekļiem noteikšana ar bactec mgit sistēmu

2017

Mūsdienās tuberkuloze ir viena no biežākajiem pacientu nāves cēloņiem pasaulē. Tuberkulozi vairākumā gadījumu izraisa M.tuberculosis. Bakalaura darbā tika analizēta literatūra, lai saprastu M.tuberculosis rezistences mehānismus pret prettuberkulozes līdzekļiem. Praktiskajai daļai tika izmantota BACTEC MGIT sistēma M.tuberculosis rezistences noteikšanai, un arī tika izmantoti rezultāti, kas iegūti SIA „RAKUS” Tuberkulozes un plaušu slimību centra Mikobakterioloģijas laboratorijā un apkopoti laboratorijas informācijas sistēmā (LIS). Satistikas analīze liecina par to, ka pasaulē un Latvijā tuberkulozes gadījumu skaits samazinās un, pateicoties labām ārstēšanas stratēģijām, izārstēto cilvēku sk…

Differences in the signaling pathways of α(1A)- and α(1B)-adrenoceptors are related to different endosomal targeting.

2013

AIMS: To compare the constitutive and agonist-dependent endosomal trafficking of α(1A)- and α(1B)-adrenoceptors (ARs) and to establish if the internalization pattern determines the signaling pathways of each subtype. METHODS: Using CypHer5 technology and VSV-G epitope tagged α(1A)- and α(1B)-ARs stably and transiently expressed in HEK 293 cells, we analyzed by confocal microscopy the constitutive and agonist-induced internalization of each subtype, and the temporal relationship between agonist induced internalization and the increase in intracellular calcium (determined by FLUO-3 flouorescence), or the phosphorylation of ERK1/2 and p38 MAP kinases (determined by Western blot). RESULTS AND C…

New agents and approaches for targeting the RAS/RAF/MEK/ERK and PI3K/AKT/mTOR cell survival pathways.

2012

The Ras/Raf/MEK/ERK and PI3K/PTEN/Akt/mTOR cascades are often activated by genetic alterations in upstream signaling molecules such as receptor tyrosine kinases (RTK). Targeting these pathways is often complex and can result in pathway activation depending on the presence of upstream mutations (e.g., Raf inhibitors induce Raf activation in cells with wild type (WT) RAF in the presence of mutant, activated RAS) and rapamycin can induce Akt activation. Targeting with inhibitors directed at two constituents of the same pathway or two different signaling pathways may be a more effective approach. This review will first evaluate potential uses of Raf, MEK, PI3K, Akt and mTOR inhibitors that have…

2020

Age-related macular degeneration (AMD) is a degenerative disease of the retina where the molecular mechanism involves the production of vascular endothelial growth factor (VEGF), a factor of poor prognosis of the progression of the disease. Previous studies have shown that resveratrol, a polyphenol of grapevines, can prevent VEGF secretion induced by stress from retinal cells. Considering the fundamental role played by VEGF in development and progression of AMD, we investigate the potential effect of red wine extract (RWE) on VEGF secretion and its signaling pathway in human retinal cells ARPE-19. To examine the effect of RWE in ARPE-19, a quantitative and qualitative analysis of the RWE wa…

Nrf2-interacting nutrients and COVID-19: time for research to develop adaptation strategies

2020

AbstractThere are large between- and within-country variations in COVID-19 death rates. Some very low death rate settings such as Eastern Asia, Central Europe, the Balkans and Africa have a common feature of eating large quantities of fermented foods whose intake is associated with the activation of the Nrf2 (Nuclear factor (erythroid-derived 2)-like 2) anti-oxidant transcription factor. There are many Nrf2-interacting nutrients (berberine, curcumin, epigallocatechin gallate, genistein, quercetin, resveratrol, sulforaphane) that all act similarly to reduce insulin resistance, endothelial damage, lung injury and cytokine storm. They also act on the same mechanisms (mTOR: Mammalian target of …

BRAFV600E mutation, TIMP-1 upregulation, and NF-κB activation: closing the loop on the papillary thyroid cancer trilogy.

2011

BRAFV600E is the most common mutation found in papillary thyroid carcinoma (PTC). Tissue inhibitor of metalloproteinases (TIMP-1) and nuclear factor (NF)-κB have been shown to play an important role in thyroid cancer. In particular, TIMP-1 binds its receptor CD63 on cell surface membrane and activates Akt signaling pathway, which is eventually responsible for its anti-apoptotic activity. The aim of our study was to evaluate whether interplay among these three factors exists and exerts a functional role in PTCs. To this purpose, 56 PTC specimens were analyzed for BRAFV600E mutation, TIMP-1 expression, and NF-κB activation. We found that BRAFV600E mutation occurs selectively in PTC nodules an…

Oestradiol or genistein rescues neurons from amyloid beta-induced cell death by inhibiting activation of p38.

2007

Oestrogenic compounds have been postulated as neuroprotective agents. This prompted us to investigate their mechanism action in neurons in primary culture. Cells were pretreated with physiological concentrations of 17-beta estradiol (0.2 nm) or with nutritionally relevant concentrations of genistein (0.5 microm), and 48 h later treated with 5 microm of amyloid beta (Abeta) for 24 h. We found that Abeta increased oxidative stress, measured as peroxide levels or oxidized glutathione/reduced glutathione ratio, which in turn, caused phosphorylation of p38 MAP kinase. Amyloid beta subsequently induced neuronal death. Inhibiting the MAP kinase pathway prevented cell death, confirming the role of …