Related Experiment Video
Updated: May 29, 2025
07:33
A Mouse Model of Intestinal Partial Obstruction
Published on: March 5, 2018
21.0K
Small intestine changes, large intestine problems
Deepanshu Singla1, Abigail E Rose1, Wenhan Zhu1
1Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, TN 37232, USA.
Trends in Microbiology
|January 31, 2025
Summary
Salmonella invasion disrupts gut amino acid absorption, increasing availability in the large intestine. This fuels pathogen colonization by altering microbial metabolism and overcoming host defenses.
Area of Science:
- Microbiology
- Gastroenterology
- Pathogen-host interactions
Background:
- Enteric pathogens face colonization resistance from the gut microbiota.
- Understanding pathogen adaptation strategies is crucial for controlling infections.
Purpose of the Study:
- To investigate how Salmonella adapts to the gut environment post-invasion.
- To elucidate the metabolic mechanisms Salmonella employs to colonize the intestine.
Main Methods:
- The study analyzed the impact of Salmonella invasion on small intestinal nutrient absorption.
- Investigated the metabolic fate of amino acids in the large intestine.
Main Results:
- Salmonella invasion of the small intestine causes significant amino acid malabsorption.
- Increased luminal amino acid availability in the large intestine supports Salmonella growth.
- Salmonella utilizes amino acid decarboxylation, counteracting short-chain fatty acid-induced acidification.
Conclusions:
- Salmonella actively manipulates host nutrient absorption to promote its own colonization.
- Metabolic adaptation, including amino acid decarboxylation, is key for Salmonella to overcome host defenses.
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