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Induction of Intestinal Inflammation by Adoptive Transfer of CBir1 TCR Transgenic CD4+ T Cells to Immunodeficient Mice

Induction of Intestinal Inflammation by Adoptive Transfer of CBir1 TCR Transgenic CD4⁺ T Cells to Immunodeficient Mice

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Metabolites from intestinal microbes shape Treg.

Markus B Geuking¹, Kathy D McCoy, Andrew J Macpherson

¹University of Bern, Maurice Müller Laboratories (DKF), University Clinic for Visceral Surgery and Medicine, Murtenstrasse 35, CH-3010 Bern, Switzerland.

|September 11, 2013

Summary

Short-chain fatty acids (SCFAs) like acetic acid, propionic acid, and butyric acid are crucial for maintaining the balance of immune cells in the colon. These microbial metabolites play a key role in colonic regulatory T cell (cTreg) homeostasis.

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Induction of Intestinal Inflammation by Adoptive Transfer of CBir1 TCR Transgenic CD4+ T Cells to Immunodeficient Mice

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Published on: May 21, 2012

Area of Science:

Microbiology
Immunology
Gastroenterology

Background:

Intestinal bacteria produce metabolites that mediate host-microbiota interactions.
Short-chain fatty acids (SCFAs) are abundant microbial metabolites involved in host physiology.
Colonic regulatory T cells (cTregs) are critical for immune homeostasis in the gut.

Purpose of the Study:

To investigate the role of major microbial-derived SCFAs in colonic regulatory T cell (cTreg) homeostasis.
To elucidate the mechanisms by which SCFAs influence cTreg function and stability.

Main Methods:

Analysis of SCFA levels in the colon.
Assessment of cTreg populations and function in vivo and in vitro.
Utilizing mouse models to study SCFA effects on immune cells.

Main Results:

Acetic acid, propionic acid, and butyric acid were identified as key SCFAs influencing cTreg homeostasis.
These SCFAs were shown to be essential for maintaining the stability and function of cTregs in the colon.
The study highlights a direct link between microbial metabolites and the host immune system.

Conclusions:

Microbial-derived SCFAs, particularly acetic acid, propionic acid, and butyric acid, are vital for colonic regulatory T cell homeostasis.
These findings underscore the importance of the gut microbiota in regulating host immunity.
Targeting SCFA production or signaling may offer therapeutic strategies for immune-related gut disorders.