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Related Concept Videos

Bile01:19

Bile

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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...
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Overview of Fatty Acid Metabolism01:28

Overview of Fatty Acid Metabolism

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Lipids also are sources of energy that power cellular processes. Like carbohydrates, lipids are composed of carbon, hydrogen, and oxygen, but these atoms are arranged differently. Most lipids are nonpolar and hydrophobic. Major types include fats and oils, waxes, phospholipids, and steroids.
Fatty acids are catabolized in a process called beta-oxidation, which takes place in the matrix of the mitochondria and converts their fatty acid chains into two-carbon units of acetyl groups. The acetyl...
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Hepatic Drug Excretion: Influencing Factors01:16

Hepatic Drug Excretion: Influencing Factors

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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...
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Cholesterol: Significance and Regulation01:29

Cholesterol: Significance and Regulation

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Although not a source of energy, cholesterol plays a significant role as a foundational structure for bile salts, steroid hormones, and vitamin D, as well as being a crucial component of plasma membranes. Approximately 15% of blood cholesterol is derived from our diet, with the remainder synthesized from acetyl CoA by the liver and intestines. Cholesterol is eliminated from the body through its conversion into bile salts, which are eventually discarded in the feces.
Considering cholesterol and...
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Lipid Catabolism01:25

Lipid Catabolism

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Triglycerides serve as crucial long-term energy storage molecules in microorganisms, providing a dense source of metabolic energy. Their breakdown is mediated by lipases, which hydrolyze triglycerides into glycerol and free fatty acids. Each of these components follows distinct metabolic pathways, ultimately contributing to ATP synthesis and cellular energy homeostasis.Glycerol MetabolismGlycerol, released from triglyceride hydrolysis, is phosphorylated by glycerol kinase to form...
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Overview of Lipid Metabolism01:24

Overview of Lipid Metabolism

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Lipid metabolism is a crucial process in the human body that involves the synthesis and degradation of lipids. This process is essential for energy production, cell membrane formation, and hormone production, among other functions.
Lipolysis: The Breakdown of Lipids:
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Related Experiment Video

Updated: Aug 5, 2025

Using Multi-fluorinated Bile Acids and In Vivo Magnetic Resonance Imaging to Measure Bile Acid Transport
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Using Multi-fluorinated Bile Acids and In Vivo Magnetic Resonance Imaging to Measure Bile Acid Transport

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Bile acids as metabolic regulators: an update.

Tiangang Li1, John Y L Chiang2

  • 1Department of Physiology, Harold Hamm Diabetes Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma.

Current Opinion in Gastroenterology
|March 28, 2023
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Summary
This summary is machine-generated.

Recent research highlights bile acid metabolism and signaling roles in health and disease. Targeting bile acid pathways may offer non-surgical options for metabolic disorders and inflammation.

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Measurement of Fatty Acid β-Oxidation in a Suspension of Freshly Isolated Mouse Hepatocytes
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Using Multi-fluorinated Bile Acids and In Vivo Magnetic Resonance Imaging to Measure Bile Acid Transport
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Real Time Monitoring of Intracellular Bile Acid Dynamics Using a Genetically Encoded FRET-based Bile Acid Sensor
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Measurement of Fatty Acid β-Oxidation in a Suspension of Freshly Isolated Mouse Hepatocytes
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Area of Science:

  • Biochemistry
  • Metabolic Diseases
  • Cellular Biology

Background:

  • Bile acids are crucial signaling molecules involved in nutrient sensing and cellular adaptive responses.
  • Differences in bile acid composition between species, like humans and mice (e.g., CYP2C70's role), impact metabolic understanding.
  • Enterohepatic bile acid signaling influences hepatic autophagy-lysosome activity and metabolic changes.

Approach:

  • This review synthesizes recent findings on bile acid metabolism and signaling pathways.
  • It examines the link between bile acid signaling and cellular processes like autophagy.
  • The review discusses the implications of bile acid signaling in the context of bariatric surgery and potential therapeutic strategies.

Key Points:

  • CYP2C70 is identified as a key enzyme in murine bile acid synthesis, explaining species-specific differences.
  • Bile acid signaling regulates hepatic autophagy, a critical pathway for starvation response.
  • Bile acid signaling mechanisms are implicated in metabolic alterations following bariatric surgery.

Conclusions:

  • Novel roles for enterohepatic bile acid signaling in metabolic regulation are continuously being discovered.
  • Understanding these pathways provides a foundation for developing novel bile acid-based therapeutics.
  • Pharmacological targeting of bile acid signaling may offer non-surgical alternatives for treating metabolic and inflammatory diseases.