Search results for "Hsp"

Molecular basis of burn wound healing in diabetics: the effect of vitamin B17, metformin, and autologous fat stem cells

Fachsprachen als Objekte der Diskurslinguistik: Epistemologische und methodologische Überlegungen am Beispiel von Finanzdiskursen

2020

International audience; Kontext und Problemstellung Dass Fachsprachen sich nicht auf Terminologie und Phraseologie reduzieren lassen – wie einst von der ISO-Norm 1087 behauptet –, ist seit langem zur Binsenwahrheit in der Fachsprachenforschung (Roelcke 2010) geworden. Die so gennannten textlinguistischen und kognitiven „Wenden“ (Figge 2000, Adazmik 2004) haben Begriffe wie Textmuster, Wissenssysteme, mentale Repräsentationen usw. in neues Licht gerückt und auch für die Analyse von Fachtexten fruchtbar gemacht (vgl. Baumann 1992 für ein erstes integratives Analysemodell). Vor diesem Hintergrund und im Anschluss an Gautier (2008, 2014, 2019) zielt der Beitrag darauf ab, die hohe Relevanz der…

Frames und konzeptuelle Metaphern: ein kognitiver Ansatz für die Fachsprachenforschung

2017

International audience; Der Vortrag geht der Frage nach potentiellen kognitiven Ansätzen in der Fachsprachenforschung nach: Nach vielen mehr oder weniger tiefgreifenden Turns wird ja diese linguistische Teildisziplin – wie die Linguistik überhaupt – immer mehr mit kognitiven Fragestellungen und Methodologien konfrontiert, die unter einer Bezeichnung wie Specialized Communication Studies (Schubert 2011) subsumiert werden können.Auf Grund eines Korpus finanzpolitischer Berichte der europäischen Zentralbank (=aus dem Englischen übersetzter Skripte der Pressekonferenzen) und der Bundesbank (= Monatsberichte) soll im Anschluss an Sullivan (2013) gezeigt werden, wie so genannte konzeptuelle Metap…

The stem rust resistance gene Rpg5 encodes a protein with nucleotide-binding-site, leucine-rich, and protein kinase domains

2008

We isolated the barley stem rust resistance genes Rpg5 and rpg4 by map-based cloning. These genes are colocalized on a 70-kb genomic region that was delimited by recombination. The Rpg5 gene consists of an unusual structure encoding three typical plant disease resistance protein domains: nucleotide-binding site, leucine-rich repeat, and serine threonine protein kinase. The predicted RPG5 protein has two putative transmembrane sites possibly involved in membrane binding. The gene is expressed at low but detectable levels. Posttranscriptional gene silencing using VIGS resulted in a compatible reaction with a normally incompatible stem rust pathogen. Allele sequencing also validated the candi…

Identification of HSP90 as a new GABARAPL1 (GEC1)-interacting protein

2011

GABARAPL1 belongs to the small family of GABARAP proteins (including GABARAP, GABARAPL1 and GABARAPL2/GATE-16), one of the two subfamilies of the yeast Atg8 orthologue. GABARAPL1 is involved in the intracellular transport of receptors, via an interaction with tubulin and GABA(A) or kappa opioid receptors, and also participates in autophagy and cell proliferation. In the present study, we identify the HSP90 protein as a novel interaction partner for GABARAPL1 using GST pull-down, mass spectrometry and coimmunoprecipitation experiments. GABARAPL1 and HSP90 partially colocalize in MCF-7 breast cancer cells overexpressed Dsred-GABARAPL1 and in rat brain. Moreover, treatment of MCF-7 cells overe…

HSP27 controls GATA-1 protein level during erythroid cell differentiation.

2010

AbstractHeat shock protein 27 (HSP27) is a chaperone whose cellular expression increases in response to various stresses and protects the cell either by inhibiting apoptotic cell death or by promoting the ubiquitination and proteasomal degradation of specific proteins. Here, we show that globin transcription factor 1 (GATA-1) is a client protein of HSP27. In 2 models of erythroid differentiation; that is, in the human erythroleukemia cell line, K562 induced to differentiate into erythroid cells on hemin exposure and CD34+ human cells ex vivo driven to erythroid differentiation in liquid culture, depletion of HSP27 provokes an accumulation of GATA-1 and impairs terminal maturation. More spec…

Human Hsp60 with Its Mitochondrial Import Signal Occurs in Solution as Heptamers and Tetradecamers Remarkably Stable over a Wide Range of Concentrati…

2014

It has been established that Hsp60 can accumulate in the cytosol in various pathological conditions, including cancer and chronic inflammatory diseases. Part or all of the cytosolic Hsp60 could be naive, namely, bear the mitochondrial import signal (MIS), but neither the structure nor the in solution oligomeric organization of this cytosolic molecule has still been elucidated. Here we present a detailed study of the structure and self-organization of naive cytosolic Hsp60 in solution. Results were obtained by different biophysical methods (light and X ray scattering, single molecule spectroscopy and hydrodynamics) that all together allowed us to assay a wide range of concentrations of Hsp60…

Pro-invasive stimuli and the interacting protein Hsp70 favour the route of alpha-enolase to the cell surface

2017

AbstractCell surface expression of alpha-enolase, a glycolytic enzyme displaying moonlighting activities, has been shown to contribute to the motility and invasiveness of cancer cells through the protein non-enzymatic function of binding plasminogen and enhancing plasmin formation. Although a few recent records indicate the involvement of protein partners in the localization of alpha-enolase to the plasma membrane, the cellular mechanisms underlying surface exposure remain largely elusive. Searching for novel interactors and signalling pathways, we used low-metastatic breast cancer cells, a doxorubicin-resistant counterpart and a non-tumourigenic mammary epithelial cell line. Here, we demon…

HSP60 and CpG-DNA-oligonucleotides differentially regulate LPS-tolerance of hepatic Kupffer cells

2004

Background/aims: Hepatic Kupffer cells (KC) are major regulators of the immune response to gut-derived bacterial products; uncontrolled activation of KC by bacterial components is of pathogenic relevance in alcoholic hepatitis and septic shock. Methods: We examined the role of bacterial lipopolysaccharide (LPS), bacterial and autologous HSP60 and bacterial DNA, which are recognized by innate Toll-like receptors, during activation of murine KC. Results: In cultivated KC, autologous HSP60 induced a state of LPS-hyporesponsiveness; bacterial DNA did not mitigate the response to subsequent LPS-challenge in vitro; in contrast, pre-treatment of mice with bacterial DNA even significantly increased…

Characterization of small HSPs from Anemonia viridis reveals insights into molecular evolution of alpha crystallin genes among cnidarians.

2014

Gene family encoding small Heat-Shock Proteins (sHSPs containing α-crystallin domain) are found both in prokaryotic and eukaryotic organisms; however, there is limited knowledge of their evolution. In this study, two small HSP genes termed AvHSP28.6 and AvHSP27, both organized in one intron and two exons, were characterised in the Mediterranean snakelocks anemone Anemonia viridis. The release of the genome sequence of Hydra magnipapillata and Nematostella vectensis enabled a comprehensive study of the molecular evolution of α-crystallin gene family among cnidarians. Most of the H. magnipapillata sHSP genes share the same gene organization described for AvHSP28.6 and AvHSP27, differing from …