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Related Concept Videos

Lipid Absorption01:24

Lipid 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...
Lipid Digestion01:06

Lipid Digestion

Lipids are large molecules that are generally not water-soluble. Since most of the digestive enzymes in the human body are water-based, there are specific steps the body must take to break down lipids and make them available for use.

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Related Experiment Video

Updated: Jul 2, 2026

DNBS/TNBS Colitis Models: Providing Insights Into Inflammatory Bowel Disease and Effects of Dietary Fat
09:04

DNBS/TNBS Colitis Models: Providing Insights Into Inflammatory Bowel Disease and Effects of Dietary Fat

Published on: February 27, 2014

High-fat meal-induced changes in the duodenum mucosa transcriptome.

Mayumi Yoshioka1, Carl Bolduc, Vincent Raymond

  • 1Functional Genomics Laboratory, Molecular Endocrinology and Oncology Research Center, Laval University Medical Center, Québec, Canada.

Obesity (Silver Spring, Md.)
|August 23, 2008
PubMed
Summary

This study explored how high-fat meals affect duodenal gene expression, revealing molecular signals related to appetite and satiety. Findings identified novel fat-responsive transcripts that could lead to new therapeutic targets for appetite control.

Related Experiment Videos

Last Updated: Jul 2, 2026

DNBS/TNBS Colitis Models: Providing Insights Into Inflammatory Bowel Disease and Effects of Dietary Fat
09:04

DNBS/TNBS Colitis Models: Providing Insights Into Inflammatory Bowel Disease and Effects of Dietary Fat

Published on: February 27, 2014

Area of Science:

  • Gastroenterology
  • Molecular Biology
  • Metabolism

Background:

  • The duodenum plays a crucial role in sensing nutrients and signaling appetite and satiety.
  • Understanding the molecular mechanisms in the duodenum after meal ingestion is key to controlling food intake.

Purpose of the Study:

  • To identify peripheral signals of appetite and satiety from the duodenum.
  • To characterize the molecular responses of duodenal mucosa to high-fat (HF) versus low-fat (LF) meals using transcriptomics.

Main Methods:

  • Transcriptomic analysis using Serial Analysis of Gene Expression (SAGE) on mouse duodenal mucosa.
  • Comparison of gene expression profiles after HF and LF diet ingestion at 30 min, 1 h, and 3 h post-meal.
  • Validation of mRNA regulations using real-time PCR.

Main Results:

  • Identified 118 differentially expressed transcripts between HF and LF groups.
  • Observed delayed expression of peptidases and decreased fat absorption-related mRNAs (e.g., apolipoprotein A-IV) after HF meals.
  • Noted HF meals induced cell growth transcripts and repressed cell defense transcripts, correlating with a break in fat intake.

Conclusions:

  • Characterized the molecular responses of duodenal mucosa to varying fat content meals.
  • Identified novel fat-responsive transcripts potentially involved in appetite and satiety regulation.
  • These findings may contribute to developing new therapeutic targets for appetite and satiety control.