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Alloantigen-enhanced accumulation of [CCR5.sup.+] 'effector' regulatory T cells in the gravid uterus
- Source :
- Proceedings of the National Academy of Sciences of the United States. Jan 9, 2007, Vol. 104 Issue 2, p594, 6 p.
- Publication Year :
- 2007
-
Abstract
- Regulatory T cells play an essential role in preventing fetal rejection by the maternal immune system. Here we show that, based on the expression of CCR5, regulatory T cells can be divided into a highly suppressive [CCR5.sup.+] and a far less suppressive [CCR5.sup.-] subpopulation, suggesting that the former represent the effector arm of regulatory T cells. Although regulatory T cells from [CCR5.sup.-/-] gene deletion mutants still suppress, they are less effective mediators of maternal-fetal tolerance. The accumulation of [CCR5.sup.+] regulatory T cells at this site appears to be enhanced by alloantigen. This finding is in stark contrast to the systemic expansion of regulatory T cells during pregnancy, which appears to be alloantigen-independent. The fact that [CCR5.sup.+] regulatory T cells preferentially accumulate in the gravid uterus and that expression of CCR5 on regulatory T cells can be induced by activation lead us to propose that CCR5 is responsible for the accumulation of those regulatory T cells that have been activated by paternal antigens. effector T cells | pregnancy | tolerance | chemokine receptor
Details
- Language :
- English
- ISSN :
- 00278424
- Volume :
- 104
- Issue :
- 2
- Database :
- Gale General OneFile
- Journal :
- Proceedings of the National Academy of Sciences of the United States
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.158682014