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Published on: September 13, 2019
Immunization with a syngeneic regressor tumor causes resorption in allo-pregnant mice
1Department of Chemical Immunology, Weizmann Institute of Science, Rehovot, Israel.
Abstract:
The purpose of our studies is to establish experimental systems in which one can deliberately disrupt the apparent maternal tolerance toward the semiallogeneic fetuses. Bases on the hypothesis that immunization against tumor-associated antigens may lead to a subsequent immune response directed against cross-reacting fetal antigens, we have immunized C57BL/6J female mice with a syngeneic regressor tumor. Mice were subsequently mated to B6D2F1, DBA/2, CBA/J or C57BL/6J males. We show that a high proportion of embryos sired by either B6D2F1 or DBA/2 males undergo resorption whereas those engendered by CBA/J or C57BL/6J males remain fully protected.
Insights
Mice immunized with tumors rejected fetuses from certain fathers but protected those from others. This suggests tumor antigen immunization can impact fetal survival based on paternal genetic background.
Area of Science:
- Immunology
- Reproductive Biology
- Oncology
Background:
- Maternal tolerance to semiallogeneic fetuses is crucial for successful pregnancy.
- Tumor-associated antigens (TAAs) may share similarities with fetal antigens, potentially triggering immune responses.
Purpose of the Study:
- To develop experimental models to disrupt maternal tolerance towards semiallogeneic fetuses.
- To test the hypothesis that immunization against TAAs can induce immune responses against cross-reactive fetal antigens.
Main Methods:
- C57BL/6J female mice were immunized with a syngeneic regressor tumor.
- Immunized mice were mated with males of different genetic backgrounds (B6D2F1, DBA/2, CBA/J, C57BL/6J).
- Embryo resorption rates were analyzed based on paternal origin.
Main Results:
- A high proportion of embryos sired by B6D2F1 and DBA/2 males underwent resorption.
- Embryos sired by CBA/J and C57BL/6J males were protected from resorption.
- This indicates a differential immune response against fetuses based on paternal antigens.
Conclusions:
- Tumor antigen immunization can break maternal-fetal tolerance in a genetically dependent manner.
- The findings highlight the potential for immune-mediated fetal loss influenced by paternal antigen exposure.
- This model system offers insights into immune regulation during pregnancy and potential therapeutic strategies.
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