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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Klatzmann, David Churlaud, Guillaume Darrasse-Jèze, Guillaume Valdivia, Karina Chaouat, Gérard Chen, Ting Ruocco, Maria Grazia Strominger, Jack L. Bergot, Anne-Sophie Courau, Tristan |
| Description | Country affiliation: France Author Affiliation: Chen T ( Université Pierre et Marie Curie, University Paris 06, F-75013 Paris, France.) |
| Abstract | Regulatory T cells (Tregs) play crucial roles in both fetal and tumor development. We recently showed that immunosurveillance by pre-existing CD44(high)CD62L(low) activated/memory Tregs (amTregs) specific for self-Ags protects emergent tumor cells in mice. This Treg response of a memory type is more rapid than and dominates the antitumor response of tumor-specific effector T cells. In this study, we report striking similarities between the early Treg responses to embryo and tumor implantation. Tregs are rapidly recruited to uterus-draining lymph nodes and activated in the first days after embryo implantation in both syngeneic and allogeneic matings; express the markers of the amTreg subset; and are at least in part self-Ag specific, as seen in tumor emergence. Unlike in the tumor emergence setting, however, for which preimmunization against tumor Ags is sufficient for complete tumor eradication even in the presence of Tregs, Treg depletion is additionally required for high frequencies of fetus loss after preimmunization against paternal tissue Ags. Thus, amTregs play a major role in protecting embryos in both naive and preimmune settings. This role and the ensuing therapeutic potential are further highlighted by showing that Treg stimulation, directly by low-dose IL-2 or indirectly by Fms-related tyrosine kinase 3 ligand, led to normal pregnancy rates in a spontaneous abortion-prone model. |
| ISSN | 00221767 |
| e-ISSN | 15506606 |
| DOI | 10.4049/jimmunol.1202413 |
| Journal | The Journal of Immunology |
| Issue Number | 5 |
| Volume Number | 191 |
| Language | English |
| Publisher | The American Association of Immunologists |
| Publisher Date | 2013-09-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Embryo Implantation Immunology Embryo, Mammalian Immune Tolerance Immunologic Memory T-lymphocytes, Regulatory Adoptive Transfer Animals Flow Cytometry Mice Mice, Inbred Balb C Mice, Inbred C57bl Neoplasms, Experimental Pregnancy Reverse Transcriptase Polymerase Chain Reaction Research Support, N.i.h., Extramural Research Support, Non-u.s. Gov't Discipline Immunology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Immunology |
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