Seminars in Immunopathology

, Volume 29, Issue 2, pp 115–122

Regulatory T cells and regulatory natural killer (NK) cells play important roles in feto-maternal tolerance

  • Shigeru Saito
  • Arihiro Shiozaki
  • Yasushi Sasaki
  • Akitoshi Nakashima
  • Tomoko Shima
  • Mika Ito
Review

DOI: 10.1007/s00281-007-0067-2

Cite this article as:
Saito, S., Shiozaki, A., Sasaki, Y. et al. Semin Immunopathol (2007) 29: 115. doi:10.1007/s00281-007-0067-2

Abstract

In the early pregnancy decidua, lymphocytes express some activation markers on their surface, suggesting that maternal lymphocytes are activated and recognize the semiallograftic fetus. Therefore, the immunoregulation system must work to prevent fetus rejection. Recent data showed that parts of the immunoregulation system such as CD4+CD25+ regulatory T (Treg) cells, Th3 cells, Tr1 cells, regulatory NK cells, and a tryptophan-catabolizing enzyme, indolamine 2,3 deoxygenase, play very important roles in the maintenance of pregnancy. Not only Treg cells but also regulatory NK cells may inhibit maternal T cell or NK cell fetal attack.

Keywords

PregnancyRegulatory T cellRegulatory NK cellTh3 cellTr1 cell

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Shigeru Saito
    • 1
  • Arihiro Shiozaki
    • 1
  • Yasushi Sasaki
    • 1
  • Akitoshi Nakashima
    • 1
  • Tomoko Shima
    • 1
  • Mika Ito
    • 1
  1. 1.Department of Obstetrics and GynecologyUniversity of ToyamaToyamaJapan