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Generation of Induced Regulatory T Cells from Primary Human Naïve and Memory T Cells
Published on: April 16, 2012
IL-12R beta 2 promotes the development of CD4+CD25+ regulatory T cells
Zhao Zhao1, Shuo Yu, Denise C Fitzgerald
1Department of Neurology, Thomas Jefferson University, Philadelphia, PA 19107, USA.
Journal of Immunology (Baltimore, Md. : 1950)
|September 5, 2008
Summary
Mice lacking the IL-12 receptor beta2 (IL-12Rbeta2) show increased susceptibility to autoimmune diseases due to impaired regulatory T cell (Treg) development and function. This highlights IL-12Rbeta2
Area of Science:
- Immunology
- Autoimmunity
- Molecular Biology
Background:
- Mice lacking the IL-12 receptor subunit beta2 (IL-12Rbeta2) exhibit exacerbated experimental autoimmune encephalomyelitis.
- The precise mechanisms and broader impact on other autoimmune conditions remain unclear.
Purpose of the Study:
- To investigate the role of IL-12Rbeta2 deficiency in autoimmune diabetes.
- To elucidate the impact of IL-12Rbeta2 on regulatory T cell (Treg) development and function.
Main Methods:
- Utilized streptozotocin-induced diabetes model in IL-12Rbeta2(-/-) and WT mice.
- Assessed T cell proliferation, Treg numbers (CD25(+)CD4(+)), and Foxp3 expression.
- Evaluated Treg suppressive function and employed small interfering RNA to confirm IL-12Rbeta2's role.
Main Results:
- IL-12Rbeta2(-/-) mice developed earlier onset and more severe autoimmune diabetes.
- T cells from IL-12Rbeta2(-/-) mice showed heightened proliferation.
- Deficiency in IL-12Rbeta2 impaired Treg development in response to TGF-beta and reduced Treg suppressive capacity.
Conclusions:
- IL-12Rbeta2 signaling is crucial for regulating Treg cell number and functional maturity.
- IL-12Rbeta2 deficiency predisposes to autoimmune diseases through compromised Treg function.
- This identifies a novel mechanism for IL-12 pathway-mediated autoimmune disease regulation.
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