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Biology of Reproduction
Article . 2001 . Peer-reviewed
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Transgenic Major Histocompatibility Complex Class I Antigen Expressed in Mouse Trophoblast Affects Maternal Immature B Cells1

Authors: Anja Langkopf; Josiane Wantyghem; Djemel Aït-Azzouzene; Marie-Claude Gendron; Colette Kanellopoulos-Langevin; R. Moutier; Stéphane M. Caucheteux; +1 Authors

Transgenic Major Histocompatibility Complex Class I Antigen Expressed in Mouse Trophoblast Affects Maternal Immature B Cells1

Abstract

We have produced transgenic mice using the mouse placental lactogen type II promoter to force and restrict the expression of the mouse major histocompatibility complex (MHC) class I molecule, H-2K(b), to the placenta. We show that the transgenic MHC antigen H-2K(b) is expressed exclusively in trophoblast giant cells from Day 10.5 until the end of gestation. This expression affects neither the fetal development nor the maternal tolerance to the fetus in histoincompatible mothers. We have used the 3.83 B cell receptor (BcR) transgenic mouse line to follow the fate of H-2K(b)-specific maternal B cells in mothers bearing H-2K(b)-positive placentas. Our results suggest that transgenic H-2K(b) molecules on trophoblast giant cells are recognized by 3.83 BcR-transgenic B cells in the bone marrow of pregnant females. This antigen recognition triggers the deletion of a bone marrow B cell subpopulation, including immature and transitional B cells. Their percentage decreases during the second half of gestation and is down to 8% on Day 17.5, compared to 22% in the (3.83 Tg female x Fvb) control group. This deletion might contribute to the process of maternal tolerance of the conceptus.

Keywords

B-Lymphocytes, Placenta, H-2 Antigens, Gene Expression, Bone Marrow Cells, Gestational Age, Mice, Transgenic, Placental Lactogen, Trophoblasts, Mice, Inbred C57BL, Embryonic and Fetal Development, Mice, Pregnancy, Immune Tolerance, Animals, Female, Lymphocyte Count, RNA, Messenger, Promoter Regions, Genetic

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
34
Top 10%
Top 10%
Top 10%
bronze