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Visualization of IL-22-expressing Lymphocytes Using Reporter Mice
Published on: January 25, 2017
Interleukin-22 drives endogenous thymic regeneration in mice
Jarrod A Dudakov1, Alan M Hanash, Robert R Jenq
1Immunology Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA. dudakovj@mskcc.org
Science (New York, N.Y.)
|March 3, 2012
Summary
Interleukin-22 (IL-22) drives thymic regeneration after injury by promoting thymic epithelial cell survival. This discovery offers new strategies for immune system repair and enhancing immune competence.
Area of Science:
- Immunology
- Regenerative Medicine
- Cell Biology
Background:
- Endogenous thymic regeneration is vital for restoring immune competence after various stresses.
- The precise molecular mechanisms underlying thymic regeneration are not fully understood.
Purpose of the Study:
- To elucidate the mechanisms of endogenous thymic regeneration.
- To identify key molecular players involved in thymic repair after insult.
Main Methods:
- Investigated the role of interleukin-22 (IL-22) in thymic regeneration.
- Utilized IL-22-deficient mice and thymic injury models (e.g., irradiation).
- Analyzed the signaling pathways involving thymic epithelial cells and lymphoid tissue inducer cells.
Main Results:
- Intrathymic IL-22 levels increased following thymic injury.
- IL-22 deficiency impaired thymic recovery after insult.
- IL-22 promotes thymic epithelial cell proliferation and survival.
- RORγ(t)(+)CCR6(+)NKp46(-) lymphoid tissue inducer cells up-regulated IL-22 in an IL-23-dependent manner post-injury.
- Exogenous IL-22 administration accelerated thymic recovery after irradiation.
Conclusions:
- IL-22 is a critical mediator of endogenous thymic regeneration.
- The IL-22 pathway, involving specific lymphoid tissue inducer cells and IL-23, is essential for thymic repair.
- Targeting IL-22 presents a promising regenerative strategy for improving immune competence.
