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Tolerance, suppression and the fetal allograft
Varuna R Aluvihare1, Marinos Kallikourdis, Alexander G Betz
1Laboratory of Molecular Biology, Medical Research Council, University of Cambridge, Hills Road, Cambridge, CB2 2QH, UK. vra1000@cus.cam.ac.uk
Journal of Molecular Medicine (Berlin, Germany)
|December 18, 2004
Summary
Pregnancy involves complex maternal immune tolerance to prevent fetal rejection, similar to organ transplantation. Regulatory T cells play a key role in this materno-fetal tolerance, suppressing immune responses against the fetus.
Area of Science:
- Immunology
- Reproductive Biology
Background:
- Solid organ transplantation requires immunosuppression to prevent rejection due to foreign alloantigens.
- The maternal immune system must tolerate the fetus, which expresses paternal antigens, preventing rejection.
Purpose of the Study:
- To review mechanisms mediating materno-fetal tolerance.
- To emphasize changes in regulatory T cell function during pregnancy and their implications.
Main Methods:
- Review of recent studies in mice and humans.
- Analysis of peripheral and systemic immune changes during pregnancy.
Main Results:
- Maternal immune aggression against the fetus is inhibited by local peripheral tolerance mechanisms.
- Systemic immune changes promote materno-fetal tolerance, involving regulatory T cells.
Conclusions:
- Regulatory T cells are crucial for suppressing maternal allo-responses against the fetus.
- Understanding these tolerance mechanisms is vital for managing pregnancy and transplantation outcomes.