title: Adoptive transfer of paternal antigen-hyporesponsive T cells induces maternal tolerance to the allogeneic fetus in abortion-prone matings.
abstract: The embryo expresses paternal Ags foreign to the mother and therefore has been viewed as an allograft. It has been shown that anergic T cells generated by blocking of the CD28/B7 costimulatory pathway with anti B7-1 and anti B7-2 mAbs can be transferred as suppresser cells to prevent allograft rejection. Little is known, however, about the in vivo function of anti-B7-treated T cells after their transfer into abortion-prone mice in the maintenance of materno-fetal tolerance. In the present study, abortion-prone CBA/J females mated with DBA/2 males were administered anti-B7-1 and anti-B7-2 mAbs on day 4 of gestation (murine implantation window). The anti-B7-treated T cells subsequently were adoptively transferred into abortion-prone CBA/J mice. We demonstrated that costimulation blockade with anti-B7 mAbs at the time of implantation resulted in altered allogeneic T cell response and overcame increased maternal rejection to the fetus in the CBA/JxDBA/2 system. The transferred anti-B7-treated T cells appeared to be regulatory, decreasing responsiveness and generating clonal deviation in maternal recipient T cells. The transferred CFSE-labeled T cells were found to reside in the spleen and uterine draining lymph nodes, and a few were localized to the materno-fetal interface of the maternal recipient. Our findings suggest that the anti-B7-treated T cells not only function as potent suppresser cells, but also exert an immunoregulatory effect on the maternal recipient T cells, which cosuppresses maternal rejection to the fetus. This procedure might be considered potentially useful for fetal survival when used as an immunotherapy for human recurrent spontaneous abortion.
authors.affiliation: Laboratory for Reproductive Immunology, Institute of Obstetrics and Gynecology, Shanghai Medical College, Fudan University, China.
authors.forename: Li-Ping
authors.initials: LP
authors.lastname: Jin
authors.forename: Da-Jin
authors.initials: DJ
authors.lastname: Li
authors.forename: Jin-Ping
authors.initials: JP
authors.lastname: Zhang
authors.forename: Ming-Yan
authors.initials: MY
authors.lastname: Wang
authors.forename: Xiao-Yong
authors.initials: XY
authors.lastname: Zhu
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhu
authors.forename: Yi
authors.initials: Y
authors.lastname: Meng
authors.forename: Min-Min
authors.initials: MM
authors.lastname: Yuan
mesh_terms: D000022:Abortion, Spontaneous / Q000276:immunology* / Q000517:prevention & control; D019264:Adoptive Transfer / Q000379:methods; D000818:Animals; D000911:Antibodies, Monoclonal / Q000008:administration & dosage; D015703:Antigens, CD / Q000276:immunology*; D018122:B7-1 Antigen / Q000276:immunology*; D051940:B7-2 Antigen; D001947:Breeding / Q000379:methods; D002465:Cell Movement / Q000276:immunology; D005260:Female; D005328:Fetal Viability / Q000276:immunology; D005333:Fetus / Q000276:immunology*; D007108:Immune Tolerance; D007165:Immunosuppression Therapy; D007274:Injections, Intraperitoneal; D007519:Isoantigens / Q000008:administration & dosage*; D008297:Male; D008562:Membrane Glycoproteins / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C; D008808:Mice, Inbred CBA; D008811:Mice, Inbred DBA; D011247:Pregnancy; D013154:Spleen / Q000166:cytology / Q000276:immunology / Q000637:transplantation; D016176:T-Lymphocyte Subsets / Q000276:immunology / Q000637:transplantation*
chemical_list: D000911:Antibodies, Monoclonal; D015703:Antigens, CD; D018122:B7-1 Antigen; D051940:B7-2 Antigen; C497965:Cd86 protein, mouse; D007519:Isoantigens; D008562:Membrane Glycoproteins