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In Vitro and In Vivo Assessment of T, B and Myeloid Cells Suppressive Activity and Humoral Responses from Transplant Recipients
Published on: August 12, 2017
T cell tolerance towards the fetal allograft
1Center of Excellence for Research, Transfer and High Education DENOTHE of the University of Florence, Florence, Italy. mppiccinni@hotmail.com
Journal of Reproductive Immunology
|March 26, 2010
Summary
The fetus, a semi-allograft, may be protected from rejection by maternal immune cells. Specific T cells and cytokines promote fetal survival by inducing immune tolerance during pregnancy.
Area of Science:
- Immunology
- Reproductive Biology
- Maternal-Fetal Medicine
Background:
- The conceptus is recognized as a semi-allograft due to paternal HLA-C molecules.
- Maternal antigen-presenting cells process these paternal alloantigens, activating maternal CD4+ T cells.
Purpose of the Study:
- To investigate the role of maternal immune cells and cytokines in preventing fetal allograft rejection.
- To understand the mechanisms underlying maternal immune tolerance during pregnancy.
Main Methods:
- Analysis of maternal CD4+ T cell activation and differentiation into effector decidual CD4+ T cells.
- Assessment of cytokine profiles (Th1 vs. Th2) in the decidual environment.
- Exploration of the collaborative interactions between decidual regulatory T cells (Tregs), CD4+ CD25+ Foxp3 T cells, and Natural Killer T (NKT) cells.
Main Results:
- Activated maternal CD4+ T cells differentiate into decidual CD4+ T cells, producing various cytokines.
- Th1-type cytokines like Interferon-gamma (IFNγ) may compromise pregnancy by promoting allograft rejection.
- Th2-type cytokines, including Interleukin-4 (IL-4) and Interleukin-10 (IL-10), promote allograft tolerance and may enhance fetal survival by inhibiting Th1 responses.
Conclusions:
- A balance of Th1/Th2 cytokines is crucial for successful pregnancy.
- Decidual regulatory T cells, CD4+ CD25+ Foxp3 T cells, and NKT cells likely collaborate to prevent fetal allograft rejection.
- Immune tolerance mechanisms are essential for maintaining pregnancy and ensuring fetal survival.
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