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Mouse Naïve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets
Published on: April 16, 2015
Cutting edge: Type I IFN reverses human Th2 commitment and stability by suppressing GATA3
Jonathan P Huber1, Hilario J Ramos, Michelle A Gill
1Department of Immunology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-9093, USA.
Journal of Immunology (Baltimore, Md. : 1950)
|June 18, 2010
Summary
Type I interferon (IFN-alpha/beta) inhibits the development of T helper 2 (Th2) cells, crucial in allergic diseases. This finding suggests IFN-alpha/beta as a potential therapy for asthma and atopy.
Area of Science:
- Immunology
- Cellular Biology
- Allergy Research
Background:
- T helper 2 (Th2) cells orchestrate immune responses to parasites and drive allergic conditions like asthma.
- Interleukin-4 (IL-4) is key for Th2 cell differentiation, inducing the GATA3 transcription factor.
- GATA3 establishes a self-reinforcing loop that maintains the Th2 cell identity.
Purpose of the Study:
- To investigate the role of type I interferon (IFN-alpha/beta) in regulating human Th2 cell development.
- To determine if IFN-alpha/beta impacts cytokine secretion from established Th2 cells.
- To elucidate the mechanism by which IFN-alpha/beta affects Th2 cells.
Main Methods:
- Human CD4(+) T cells were cultured under Th2-polarizing conditions with or without type I IFN.
- Cytokine secretion from Th2 cells was measured.
- GATA3 expression levels were assessed.
- Retroviral transduction was used to ectopically express GATA3.
Main Results:
- Type I IFN (IFN-alpha/beta) significantly inhibited the development of human Th2 cells.
- IFN-alpha/beta suppressed cytokine secretion from committed Th2 cells.
- This inhibitory effect was specific to type I IFN and not observed with IFN-gamma or IL-12.
- IFN-alpha/beta acted by inhibiting GATA3 expression and function, even when GATA3 was ectopically expressed.
Conclusions:
- Type I interferon (IFN-alpha/beta) acts as a novel negative regulator of human Th2 cell development and function.
- The inhibitory mechanism involves suppression of GATA3.
- IFN-alpha/beta shows therapeutic potential for treating Th2-mediated diseases such as asthma and atopy.
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