About: CYP8B1 is a research topic. Over the lifetime, 701 publications have been published within this topic receiving 55641 citations. The topic is also known as: CP8B & CYP12.
TL;DR: Results presented here show that bile acids are physiological ligands for the farnesoid X receptor (FXR), an orphan nuclear receptor, which demonstrates a mechanism by which bile acid transcriptionally regulate their biosynthesis and enterohepatic transport.
Abstract: Bile acids are essential for the solubilization and transport of dietary lipids and are the major products of cholesterol catabolism Results presented here show that bile acids are physiological ligands for the farnesoid X receptor (FXR), an orphan nuclear receptor When bound to bile acids, FXR repressed transcription of the gene encoding cholesterol 7alpha-hydroxylase, which is the rate-limiting enzyme in bile acid synthesis, and activated the gene encoding intestinal bile acid-binding protein, which is a candidate bile acid transporter These results demonstrate a mechanism by which bile acids transcriptionally regulate their biosynthesis and enterohepatic transport
TL;DR: The potential exists for altering the bile acid pool by targeting key enzymes in the 7α/β-dehydroxylation pathway through the development of pharmaceuticals or sequestering bile acids biologically in probiotic bacteria, which may result in their effective removal from the host after excretion.
TL;DR: It is suggested that the gut microbiota not only regulates secondary bile acids metabolism but also inhibits bile acid synthesis in the liver by alleviating FXR inhibition in the ileum.
TL;DR: The synthesis and excretion of bile acids comprise the major pathway of cholesterol catabolism in mammals and causes a spectrum of human disease; this ranges from liver failure in early childhood to progressive neuropathy in adults.
Abstract: ▪ Abstract The synthesis and excretion of bile acids comprise the major pathway of cholesterol catabolism in mammals. Synthesis provides a direct means of converting cholesterol, which is both hydrophobic and insoluble, into a water-soluble and readily excreted molecule, the bile acid. The biosynthetic steps that accomplish this transformation also confer detergent properties to the bile acid, which are exploited by the body to facilitate the secretion of cholesterol from the liver. This role in the elimination of cholesterol is counterbalanced by the ability of bile acids to solubilize dietary cholesterol and essential nutrients and to promote their delivery to the liver. The synthesis of a full complement of bile acids requires 17 enzymes. The expression of selected enzymes in the pathway is tightly regulated by nuclear hormone receptors and other transcription factors, which ensure a constant supply of bile acids in an ever changing metabolic environment. Inherited mutations that impair bile acid synth...
TL;DR: A potent, nonsteroidal FXR ligand is used to show that FXR induces expression of small heterodimer partner 1 (SHP-1), an atypical member of the nuclear receptor family that lacks a DNA-binding domain that provides a molecular basis for the coordinate suppression of CYP7A1 and other genes involved in bile acid biosynthesis.