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Glucocorticoids upregulate FOXP3 expression and regulatory T cells in asthma
Christian Karagiannidis1, Mübeccel Akdis, Päivi Holopainen
1Swiss Institute of Allergy and Asthma Research, Davos, Switzerland.
The Journal of Allergy and Clinical Immunology
|December 4, 2004
Summary
Glucocorticoids boost T regulatory (T reg) cell activity by increasing FOXP3 expression, potentially aiding allergy and asthma treatments. Further research could stabilize this T reg cell effect for better therapeutic outcomes.
Area of Science:
- Immunology
- Molecular Biology
- Allergy and Asthma Research
Background:
- T regulatory (T reg) cells are crucial for immune balance and preventing allergic reactions.
- Loss of immune tolerance to allergens can lead to diseases like asthma, often managed with glucocorticoids.
Purpose of the Study:
- To investigate the impact of glucocorticoids on T regulatory cell activity.
- To analyze the effect of glucocorticoids on FOXP3 and cytokine expression in T reg cells.
Main Methods:
- Isolated CD4+ T cells from healthy donors and asthmatic patients.
- Measured FOXP3, IL-10, and TGF-beta1 expression in vivo and in vitro.
- Assessed glucocorticoid effects before and after treatment.
Main Results:
- Glucocorticoid treatment significantly increased FOXP3 mRNA expression in asthmatic patients.
- FOXP3 expression correlated with IL-10 but not with a specific gene polymorphism or IgE levels.
- Glucocorticoids induced FOXP3 and IL-10 expression in T cells in vitro.
Conclusions:
- Glucocorticoids promote T regulatory cell differentiation via a FOXP3-dependent pathway.
- This suggests a potential mechanism for improving allergy and asthma therapies.
- Stabilizing glucocorticoid-induced T reg cell activity could enhance treatment efficacy.
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