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Isolation and Th17 Differentiation of Naïve CD4 T Lymphocytes
Published on: September 26, 2013
IL-21-producing Th cells in immunity and autoimmunity
1Immunological Diseases Program, Garvan Institute of Medical Research, Darlinghurst, New South Wales 2010.
Journal of Immunology (Baltimore, Md. : 1950)
|September 24, 2013
Summary
Interleukin-21 (IL-21) is crucial for immune cell function, promoting lymphocyte growth and survival. Neutralizing IL-21 effectively halts inflammation in non-lymphoid tissues, highlighting its targeted therapeutic potential.
Area of Science:
- Immunology
- Molecular Biology
- Cell Biology
Background:
- Interleukin-21 (IL-21) belongs to the common gamma-chain signaling family of cytokines.
- IL-21 plays a significant role in lymphocyte activation, proliferation, differentiation, and survival.
Purpose of the Study:
- To investigate the dual role of IL-21 in immune responses within lymphoid and non-lymphoid organs.
- To explore the potential of IL-21 neutralization as a therapeutic strategy for inflammatory conditions.
Main Methods:
- In vitro analyses of immune cell behavior in response to IL-21.
- Studies using mice deficient in IL-21 or its receptor.
- Pharmacological neutralization of IL-21 in vivo.
Main Results:
- IL-21 influences lymphocyte growth and survival through autocrine and paracrine signaling pathways.
- IL-21-producing CD4+ T helper cells include T follicular helper and Th17 cells.
- While IL-21 shows redundancy in lymphoid organs, its neutralization effectively halts inflammation in non-lymphoid organs.
Conclusions:
- IL-21 exhibits context-dependent functions, acting redundantly in lymphoid tissues but dominantly in non-lymphoid organs.
- Targeted blockade of IL-21 presents a promising therapeutic approach for inflammatory diseases in non-lymphoid tissues.
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