Journal of Animal Reproduction and Biotechnology (한국동물생명공학회지)

The Korean Society of Animal Reproduction and Biotechnology (한국동물생명공학회)
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Innate lymphoid cell markers: expression, localization, and regulation at the maternal-conceptus interface in pigs

  • Yugyeong Cheon (Department of Biological Science and Technology, Yonsei University) ;
  • Inkyu Yoo (Department of Biological Science and Technology, Yonsei University) ;
  • Soohyung Lee (Department of Biological Science and Technology, Yonsei University) ;
  • Hakhyun Ka (Department of Biological Science and Technology, Yonsei University)
  • Received : 2023.05.31
  • Accepted : 2023.07.04
  • Published : 2023.09.30
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Abstract

Background: The regulation of maternal immunity is critical for the establishment and maintenance of successful pregnancy. Among many cell types regulating the immune system, innate lymphoid cells (ILCs) are known to play an important role in innate immunity. Although some reports show that ILCs are present at the maternalconceptus interface in humans and mice, the expression and function of ILCs in the endometrium have not been studied in pigs. Methods: Thus, we determined the expression, localization, and regulation of ILC markers, CD127 (a common marker for ILCs), BCL11B (a ILC2 marker), and RORC (a ILC3 marker) at the maternal-conceptus interface in pigs. Results: The expression of BCL11B and RORC, but not CD127, in the endometrium changed during pregnancy in a stage-specific manner and the expression of CD127, BCL11B, and RORC was greatest on Day 15 during pregnancy. CD127, BCL11B, and RORC were also expressed in conceptus tissues during early pregnancy and in chorioallantoic tissues during the later stage of pregnancy. BCL11B and RORC proteins were localized to specific cells in endometrial stroma. The expression of CD127 and BCL11B, but not RORC, was increased by the increasing doses of interferon-γ (IFNG) in endometrial explants. Conclusions: These results suggest that ILCs present at the maternal-conceptus interface may play a role in the establishment and maintenance of pregnancy by regulating the innate immunity in pigs.

Keywords

Acknowledgement

The authors thank all the members of the Animal Biotechnology Laboratory, Yonsei University, for their support and assistance throughout this project.

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