Related Experiment Video
Updated: Jun 12, 2025
06:14
The Isolation of Flowing Mesenteric Lymph in Mice to Quantify In Vivo Kinetics of Dietary Lipid Absorption and Chylomicron Secretion
Published on: November 30, 2022
2.4K
The Checkpoints of Intestinal Fat Absorption in Obesity
Ayse Basak Engin1, Atilla Engin2,3
1Faculty of Pharmacy, Department of Toxicology, Gazi University, Hipodrom, Ankara, Turkey. abengin@gmail.com.
Advances in Experimental Medicine and Biology
|September 17, 2024
Summary
This chapter details intestinal lipid transport, focusing on fatty acid absorption and triglyceride reassembly in enterocytes. Understanding these processes is key to managing fat homeostasis and preventing obesity.
Area of Science:
- Nutritional Science
- Cell Biology
- Metabolic Physiology
Background:
- Intestinal lipid transport is crucial for fat homeostasis and obesity development.
- Dietary fats are absorbed, reassembled into triglycerides (TAG), and packaged into chylomicrons (CMs) within enterocytes.
Purpose of the Study:
- To describe mechanisms of intestinal lipid absorption, reassembly, and transport.
- To highlight receptor functions in dietary lipid handling.
- To evaluate checkpoints in intestinal fat processing for preventing obesity and lipotoxicity.
Main Methods:
- Review of mechanisms for fatty acid and monoacylglycerol absorption.
- Discussion of triglyceride resynthesis and chylomicron formation.
- Analysis of receptor functions, fatty acid binding proteins (FABPs), and signaling pathways.
Main Results:
- Enterocyte lipid processing balances storage and secretion, impacting blood lipids and energy balance.
- Intestinal fat absorption influences lipid homeostasis and body fat stores.
- CD36-mediated fatty acid conversion into lipid messengers is discussed.
Conclusions:
- Understanding intestinal lipid transport is vital for metabolic health.
- Targeting intestinal fat processing offers strategies for obesity and lipotoxicity prevention.
- Key checkpoints in lipid metabolism regulation are identified.
Related Concept Videos
01:26Glucose Absorption Into the Small Intestine
31.4K
Complex carbohydrates consumed cannot be absorbed into the small intestine in their original form. First, they must be hydrolyzed to a monosaccharide form such as glucose or galactose. These monosaccharides are then transported across the intestinal membrane and into the blood via transcellular transport. The intestinal epithelial cells allow the movement of these monosaccharides with a defined 'entry' through membrane transporter proteins present on their apical membrane and...
31.4K
01:24Lipid Absorption
403
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...
403
01:27Histology of the Small Intestine
569
The small intestine exhibits a unique histological structure that significantly enhances its function in digestion and nutrient absorption. These structures include circular folds, villi, and various specialized cells that collectively facilitate the digestion of food.
The intestinal lining features transverse folds called circular folds, each housing fingerlike projections known as intestinal villi. These villi are covered by a layer of simple columnar epithelium, also referred to as...
The intestinal lining features transverse folds called circular folds, each housing fingerlike projections known as intestinal villi. These villi are covered by a layer of simple columnar epithelium, also referred to as...
569