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In Vivo Augmentation of Gut-Homing Regulatory T Cell Induction
Published on: January 22, 2020
CD44 expression positively correlates with Foxp3 expression and suppressive function of CD4+ Treg cells
Tie Liu1, Lynn Soong, Gang Liu
1Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, USA. tieliu@utmb.edu
Biology Direct
|October 27, 2009
Summary
This study identifies two new types of regulatory T (Treg) cells in the thymus. CD44 expression is crucial for Treg cell function, influencing Foxp3 and IL-10 levels and their ability to suppress T cell proliferation.
Area of Science:
- Immunology
- Cell Biology
Background:
- CD4(+)CD25(+) regulatory T (Treg) cells are crucial for immune suppression.
- The role of CD44 in Treg cell development and function remains unclear.
- Foxp3 and cytokines modulate Treg cell activity.
Purpose of the Study:
- To investigate the role of CD44 in Treg cell development and function.
- To analyze Foxp3 expression in CD44(+) Treg cells.
- To measure IL-10 levels and suppressor activity in different Treg cell subsets.
Main Methods:
- Flow cytometry to identify novel Treg cell phenotypes (CD44(+) and CD44(-)).
- Multi-parameter analyses to correlate CD44 expression with Foxp3, IL-10, and Treg activity.
- In vitro assays to assess Treg cell suppressor activity and the effect of anti-IL-10 antibodies.
Main Results:
- Two novel Treg cell phenotypes (CD4(+)CD8(-)CD25(+)CD44(+) and CD4(+)CD8(-)CD25(+)CD44(-)) were identified in mouse thymocytes.
- CD44 expression positively correlated with Foxp3 expression, IL-10 production, and Treg activity.
- CD4(+)CD25(+)CD44(+) Treg cells exhibited higher IL-10 levels and enhanced suppressor activity compared to CD4(+)CD25(+)CD44(-) cells.
Conclusions:
- This study reveals two novel Treg cell phenotypes in the thymus.
- CD44 plays a significant functional role in defining Treg cell subsets.
- Both IL-10 and Foxp3 are key modulators of Treg cell function.
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