Concept

Acide biliaire

Publications associées (92)

TGR5 reduces macrophage migration through mTOR-induced C/EBP beta differential translation

Kristina Schoonjans, Alessia Perino, Matthias Alexander Sokrates Stein, Mitsunori Nomura, Thijs Pols

The bile acid-responsive G protein-coupled receptor TGR5 is involved in several metabolic processes, and recent studies suggest that TGR5 activation may promote pathways that are protective against diet-induced diabetes. Here, we investigated the role of m ...

American Society for Clinical Investigation2014

An organic hydrophilic dye for water-based dye-sensitized solar cells

Ulf Anders Hagfeldt, Liang Sun

In this study we report the first organic hydrophilic dye employed for 100% water-based electrolyte DSSCs. We show that the replacement of alkyl by glycolic chains in the dye structure is able to provide excellent wettability, resulting in an efficient sys ...

2014

Dye adsorption on TiO2 electrodes studied using modulated photocurrent measurements

Ulf Anders Hagfeldt

An in-situ modulated photocurrent technique to study kinetics of dye adsorption and to determine binding constants of dye molecules on the TiO 2 surface is presented. An AC-photocurrent signal is measured, when a TiO2 electrode is in contact with the dye b ...

2014

Dye Regeneration Dynamics by Electron Donors on Mesoscopic TiO2 Films

Michael Graetzel, Shaik Mohammed Zakeeruddin, Thomas Moehl

The influence of different redox mediators and electrolyte constituents on charge transfer processes in dye-sensitized solar cells (DSC) was studied by contactless transient photoconductance (TPC) measurements. Device subsets without FTO (Fluorine-doped ti ...

American Chemical Society2014

The Receptor TGR5 Mediates the Prokinetic Actions of Intestinal Bile Acids and Is Required for Normal Defecation in Mice

Kristina Schoonjans

BACKGROUND & AIMS: Abnormal delivery of bile acids (BAs) to the colon as a result of disease or therapy causes constipation or diarrhea by unknown mechanisms. The G protein-coupled BA receptor TGR5 (or GPBAR1) is expressed by enteric neurons and endocrine ...

W B Saunders Co-Elsevier Inc2013

Bile Acids Increase Levels of MicroRNAs 221 and 222, Leading to Degradation of CDX2 During Esophageal Carcinogenesis

Johan Auwerx

BACKGROUND & AIMS: Bile reflux contributes to development of Barrett's esophagus (BE) and could be involved in its progression to esophageal adenocarcinoma (EAC). We investigated whether bile acids affect levels or functions of microRNAs (MIRs) 221 and 222 ...

Elsevier2013

The Receptor TGR5 Protects the Liver From Bile Acid Overload During Liver Regeneration in Mice

Kristina Schoonjans

Many regulatory pathways are involved in liver regeneration after partial hepatectomy (PH) to initiate growth, protect liver cells, and sustain functions of the remnant liver. Bile acids (BAs), whose levels rise in the blood early after PH, stimulate both ...

Wiley-Blackwell2013

Diet1 Functions in the FGF15/19 Enterohepatic Signaling Axis to Modulate Bile Acid and Lipid Levels

Johan Auwerx

We identified a mutation in the Diet1 gene in a mouse strain that is resistant to hyperlipidemia and atherosclerosis. Diet1 encodes a 236 kD protein consisting of tandem low-density lipoprotein receptor and MAM (meprin-A5-protein tyrosine phosphatase mu) d ...

Cell Press2013

Role of the bile acid membrane receptor TGR5 in macrophages and metabolism

Mitsunori Nomura

Activation of the bile acid responsive G protein-coupled receptor TGR5 improves metabolic homeostasis via induction of energy expenditure and release of glucagon-like peptide-1 (GLP-1). The goal of my PhD work was to explore the role of macrophage TGR5 wit ...

EPFL2013

Probing the Binding Site of Bile Acids in TGR5

Johan Auwerx, Kristina Schoonjans, Thijs Pols

TGR5 is a G-protein-coupled receptor (GPCR) mediating cellular responses to bile acids (BAs). Although some efforts have been devoted to generate homology models of TGR5 and draw structure-activity relationships of BAs, none of these studies has hitherto d ...

American Chemical Society2013

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