Related Experiment Video
Updated: Feb 13, 2026
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Adenoviral Transduction of Naive CD4 T Cells to Study Treg Differentiation
Published on: August 13, 2013
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Tissues Guide Dependence of Treg on the Transferrin Receptor.
Biorxiv : the Preprint Server for Biology
|February 12, 2026
Summary
Regulatory T cells (Tregs) require the transferrin receptor (CD71) for iron uptake. Loss of CD71 in Tregs causes severe autoimmunity, but CD71 also suppresses inflammation in specific tissues like the skin.
Area of Science:
- Immunology
- Metabolic pathways
- Cellular iron uptake
Background:
- Activated T cells, including regulatory T cells (Tregs), utilize the transferrin receptor (CD71) for iron uptake, crucial for cellular metabolism.
- Previous studies showed CD71 antibody treatment affects CD4 T cell function, but the precise role of CD71 in Treg stability and function remained unclear, especially given conflicting reports on genetic deletion models.
Purpose of the Study:
- To investigate the role of CD71 in Treg cell function and stability using genetic knockout mouse models.
- To determine if iron deficiency due to CD71 loss leads to Treg instability and autoimmunity.
- To explore tissue-specific roles of CD71 in Treg-mediated immune homeostasis.
Main Methods:
- Utilized *Foxp3*-Cre and tamoxifen-inducible *Foxp3*-Cre mouse models to achieve conditional knockout of the transferrin receptor (Tfrc) gene in Tregs.
- Analyzed Treg cell viability, differentiation, Foxp3 expression, and metabolic profiles (glycolysis, fatty acid oxidation, amino acid oxidation).
- Examined tissue-specific inflammation in knockout mice, focusing on colon, skin, and lung, and assessed Treg function in an atopic dermatitis model.
Main Results:
- Genetic deletion of CD71 in Tregs did not universally cause instability but led to tissue-specific inflammation, particularly in the skin and lungs, while the colon remained healthy.
- CD71 knockout Tregs exhibited reduced glycolytic capacity, with increased reliance on fatty acid and amino acid oxidation.
- In a model of atopic dermatitis, CD71 expression on Tregs suppressed inflammation, highlighting its protective role in specific immune contexts.
Conclusions:
- The CD71-iron axis is a critical immunometabolic regulator of Treg cell function in both immune and non-immune organs.
- Treg cells' reliance on CD71-mediated iron uptake is context-dependent and tissue-specific.
- CD71 plays a vital role in suppressing inflammation in certain tissues, such as the skin, during inflammatory conditions like atopic dermatitis.
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