Publications associées à Bile acids drive colonic secretion of glucagon-like-peptide 1 and peptide-YY in rodents

Characterization of the gut-bone marrow axis through bile acid signaling

Communication between the intestine and other organs such as the lungs, brain or bones is mediated by several metabolites, like short-chain fatty acids or bile acids, that relay information about nutritional and microbiota status. Bile acids are endogenous ...

EPFL2024

Structural basis of bile salt extrusion and small-molecule inhibition in human BSEP

Henning Paul-Julius Stahlberg, Dongchun Ni

BSEP (ABCB11) is an ATP-binding cassette transporter that is expressed in hepatocytes and extrudes bile salts into the canaliculi of the liver. BSEP dysfunction, caused by mutations or induced by drugs, is frequently associated with severe cholestatic live ...

Nature Portfolio2023

Short Article Hypothalamic bile acid-TGR5 signaling protects from obesity

Kristina Schoonjans, Alessia Perino

Bile acids (BAs) improve metabolism and exert anti-obesity effects through the activation of the Takeda G protein-coupled receptor 5 (TGR5) in peripheral tissues. TGR5 is also found in the brain hypothalamus, but whether hypothalamic BA signaling is implic ...

Cell Press2021

Molecular physiology of bile acid signaling in health, disease, and aging

Kristina Schoonjans, Alessia Perino, Hadrien Charles Edouard Demagny, Laura Alejandra Velazquez Villegas

Over the last two decades, bile acids (BAs) have become established as important signaling molecules that enable fine-tuned inter-tissue communication from the liver, their site of production, over the intestine, where they are modified by the gut microbio ...

2021

Dietary Fiber Is Essential to Maintain Intestinal Size, L-Cell Secretion, and Intestinal Integrity in Mice

Kristina Schoonjans

Dietary fiber has been linked to improved gut health, yet the mechanisms behind this association remain poorly understood. One proposed mechanism is through its influence on the secretion of gut hormones, including glucagon-like peptide-1 (GLP-1) and gluca ...

FRONTIERS MEDIA SA2021

Emerging functions of the nuclear receptor LRH-1 in liver physiology and pathology

Kristina Schoonjans, Hadrien Charles Edouard Demagny, Yu Sun

Nuclear receptors play pleiotropic roles in cell differentiation, development, proliferation, and metabolic processes to govern liver physiology and pathology. The nuclear receptor, liver receptor homolog-1 (LRH-1, NR5A2), originally identified in the live ...

2021

Obesity-associated deficits in inhibitory control are phenocopied to mice through gut microbiota changes in one-carbon and aromatic amino acids metabolic pathways

Xavier Fernandez-Real Girona

Background Inhibitory control (IC) is critical to keep long-term goals in everyday life. Bidirectional relationships between IC deficits and obesity are behind unhealthy eating and physical exercise habits. ...

BMJ PUBLISHING GROUP2021

Biogeography and biochemistry of bile acid 7-dehydroxylation in the mammalian gut

Solenne Anne Marie Marion

Bile acids (BAs) are small molecules synthesized by the host and chemically modified by the microorganisms inhabiting the intestinal tract. The microbial transformation of BAs in the gut is critical to BA-mediated signaling as it modifies their amount and ...

EPFL2020

Bile Acids Signal via TGR5 to Activate Intestinal Stem Cells and Epithelial Regeneration

Kristina Schoonjans, Maroun Bou Sleiman, Alessia Perino, Ece Yildiz, Giovanni Sorrentino, Gaby El Alam

BACKGROUND & AIMS: Renewal and patterning of the intestinal epithelium is coordinated by intestinal stem cells (ISCs); dietary and metabolic factors provide signals to the niche that control ISC activity. Bile acids (BAs), metabolites in the gut, signal nu ...

2020

Maternal glucose homeostasis is impaired in mouse models of gestational cholestasis

Kristina Schoonjans

Women with intrahepatic cholestasis of pregnancy (ICP), a disorder characterised by raised serum bile acids, are at increased risk of developing gestational diabetes mellitus and have impaired glucose tolerance whilst cholestatic. FXR and TGR5 are modulato ...

Nature Research2020

Biogeography of microbial bile acid transformations along the murine gut

Rizlan Bernier-Latmani, Laure Menin, Lyne Desharnais, Solenne Anne Marie Marion

Bile acids, which are synthesized from cholesterol by the liver, are chemically transformed along the intestinal tract by the gut microbiota, and the products of these transformations signal through host receptors, affecting overall host health. These tran ...

AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC2020

Transcriptomic analysis across liver diseases reveals disease-modulating activation of constitutive androstane receptor in cholestasis

Kristina Schoonjans, Bhoomika Mathur, Jian Liu

Background & Aims: Liver diseases are caused by many factors, such as genetics, nutrition, and viruses. Therefore, it is important to delineate transcriptomic changes that occur in various liver diseases. Methods: We performed high-throughput sequencing of ...

2020

PHD3 Loss Promotes Exercise Capacity and Fat Oxidation in Skeletal Muscle

Daniel Garcia, Johan Auwerx, Hao Li

Rapid alterations in cellular metabolism allow tissues to maintain homeostasis during changes in energy availability. The central metabolic regulator acetyl-CoA carboxylase 2 (ACC2) is robustly phosphorylated during cellular energy stress by AMP-activated ...

Cell Press2020

NTCP deficiency in mice protects against obesity and hepatosteatosis

Kristina Schoonjans

Bile acids play a major role in the regulation of lipid and energy metabolism. Here we propose the hepatic bile acid uptake transporter Na+ taurocholate cotransporting polypeptide (NTCP) as a target to prolong postprandial bile acid elevations in plasma. R ...

2019

Micellization behavior of bile salt with pluronic (F-127) and synthesis of silver nanoparticles in a mixed system

Mohammad Khaja Nazeeruddin

The sequestrant is a substance used to cure bile salt diarrhea. They bind to bile salts by hydrophobic and electrostatic forces to stop them from contact with colon mucosa. The block copolymer could be used as bile salt binding agents. Herein, the physicoc ...

WILEY2019

The G Protein-Coupled Bile Acid Receptor TGR5 (Gpbar1) Modulates Endothelin-1 Signaling in Liver

Kristina Schoonjans

TGR5 (Gpbar1) is a G protein-coupled receptor responsive to bile acids (BAs), which is expressed in different non-parenchymal cells of the liver, including biliary epithelial cells, liver-resident macrophages, sinusoidal endothelial cells (LSECs), and acti ...

2019

Brain metabolism during Chronic Hepatic Encephalopathy studied by in vivo 1H and 31P MRS

Veronika Rackayová

Magnetic resonance spectroscopy (MRS) is a powerful tool increasingly used in biomedical research and also in clinical practice. This thesis focused on the improvements of in vivo 31P MRS and 31P magnetization transfer methods at high magnetic field (9.4T ...

EPFL2018

Bile acids deoxycholic acid and ursodeoxycholic acid differentially regulate human beta-defensin-1 and-2 secretion by colonic epithelial cells

Kristina Schoonjans, Alessia Perino

Bile acids and epithelial-derived human beta-defensins (H beta Ds) are known to be important factors in the regulation of colonic mucosal barrier function and inflammation. We hypothesized that bile acids regulate colonic H beta D expression and aimed to t ...

Federation of American Society of Experimental Biology2017

beta-Klotho deficiency protects against obesity through a crosstalk between liver, microbiota, and brown adipose tissue

Kristina Schoonjans

beta-Klotho (encoded by Klb) is the obligate coreceptor mediating FGF21 and FGF15/19 signaling. Klb(-/-)mice are refractory to beneficial action of pharmacological FGF21 treatment including stimulation of glucose utilization and thermogenesis. Here, we inv ...

Amer Soc Clinical Investigation Inc2017

The microbiota provides colonisation resistance against intestinal helminths by regulating intestinal physiology

Luc Xavier Marie Lebon

Intestinal helminth infections are a global health problem affecting particularly people living in poor countries. Heavy worm burdens can lead to nutritional and cognitive deficiencies. Type-two immunity plays a crucial role in promoting tissue repair and ...

EPFL2017