Related Experiment Video
Updated: Jul 8, 2026
08:42
Using Multi-fluorinated Bile Acids and In Vivo Magnetic Resonance Imaging to Measure Bile Acid Transport
Published on: November 27, 2016
A translational view on the biliary lipid secretory network
Giuseppe Lo Sasso1, Michele Petruzzelli, Antonio Moschetta
1Laboratory of Lipid Metabolism and Cancer, Department of Translational Pharmacology, Consorzio Mario Negri Sud, Santa Maria Imbaro, Chieti, Italy.
Biochimica Et Biophysica Acta
|January 16, 2008
Summary
Bile formation involves a complex network regulating cholesterol and lipid metabolism. Understanding these pathways, particularly nuclear receptors, offers potential treatments for liver and gallbladder diseases.
Area of Science:
- Hepatology and Gastroenterology
- Molecular Biology
- Physiology
Background:
- Bile formation is a sophisticated secretory process involving transport proteins and lipophilic compounds.
- This process is regulated by dietary stimuli, circadian rhythms, and metabolic demands.
- Bile flow is crucial for cholesterol disposal, lipid digestion, and absorption within the enterohepatic system.
Purpose of the Study:
- To review recent discoveries in the functional biology of bile formation.
- To highlight the clinical relevance of these findings for treating liver and gallbladder diseases.
- To emphasize the role of nuclear receptors in regulating hepato-biliary homeostasis.
Main Methods:
- Literature review focusing on recent advancements in bile formation research.
- Analysis of molecular pathways governing bile flow regulation.
- Examination of the role of nuclear receptors as ligand-activated transcription factors.
Main Results:
- Bile formation is a coordinated effort between the liver and intestine, regulated by nuclear receptors.
- Nuclear receptors activate genes essential for hepato-biliary homeostasis.
- Understanding these pathways has translational value for treating cholestasis and cholelithiasis.
Conclusions:
- Mastering the molecular pathways of bile flow is key for therapeutic advancements.
- Nuclear receptors play a central role in coordinating bile formation and hepato-biliary homeostasis.
- Further research into these mechanisms holds promise for treating cholestasis and cholelithiasis.
Related Concept Videos
01:24Lipid Absorption
Dietary triglycerides from chyme in the duodenum are mixed with bile salts produced by the liver to emulsify fats. As a result, large droplets are broken down into smaller ones, increasing the surface area for enzymatic action. Once emulsified, pancreatic lipases hydrolyze the triglycerides into free fatty acids and monoglycerides.
These breakdown products bind with bile salts and lecithin to form micelles, which quickly pass between microvilli to come in close contact with the apical...
These breakdown products bind with bile salts and lecithin to form micelles, which quickly pass between microvilli to come in close contact with the apical...
01:19Bile
Bile is a crucial bodily fluid, characterized by its yellow-green color and alkaline nature. Produced in the liver, it is transported through the common hepatic duct into either the cystic duct, leading to the gallbladder, or directly into the common bile duct. The flow of bile is regulated by the sphincter of Oddi located at the entrance of the duodenum. When this sphincter is closed, bile is redirected to the gallbladder for storage and concentration.
Bile is released when dietary fats enter...
Bile is released when dietary fats enter...
01:33Overview of Secretory Vesicles
Secretory vesicles, also known as dense core vesicles (DCVs), are membrane-bound vesicles that transport secretory proteins, such as hormones or neurotransmitters. Regulated secretory vesicles transport proteins from the trans-Golgi network to the exterior of the cell. Proteins present in regulated secretory vesicles are required to be rapidly exocytosed in large amounts upon a specific stimulus.
Various proteins regulate the aggregation of molecules inside the secretory vesicles. Chromogranins...
Various proteins regulate the aggregation of molecules inside the secretory vesicles. Chromogranins...
01:16Hepatic Drug Excretion: Influencing Factors
The biliary system of the liver, crucial for bile secretion and drug excretion, comprises intrahepatic bile ducts that merge to form the common hepatic duct. This duct, carrying hepatic bile, combines with the cystic duct, draining the gallbladder and forming the common bile duct, which empties into the duodenum. Bile, produced by hepatic cells lining the bile canaliculi, is composed primarily of water, bile salts, pigments, electrolytes, and lesser amounts of cholesterol and fatty acids. Bile...
01:28Assembly of the Lipid Bilayer in the ER
Biological membranes are more than just a barrier separating cell cytoplasm from the outside environment. They are highly dynamic and help maintain the integrity and physiological stability of the cells as well as membrane-bound organelles. Membranes also play vital roles in cell-to-cell and intracellular communication.
A large chunk of any biological membrane is composed of phospholipids. These lipids have a heterogeneous distribution across different subcellular organelles and even between...
A large chunk of any biological membrane is composed of phospholipids. These lipids have a heterogeneous distribution across different subcellular organelles and even between...
01:05Insulin Secretory Vesicles
Insulin secretory vesicles release insulin to stimulate blood glucose uptake and regulate carbohydrate metabolism. When the blood glucose levels increase, glucose enters the pancreatic β-islet cells through glucose transporters. Once inside, glucose is metabolized through glycolysis, the citric acid cycle, and the electron transport chain, producing ATP. This increase in ATP concentration closes ATP-sensitive potassium channels, leading to depolarization of the membrane and the opening of...