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Updated: Jul 3, 2026

Assessment of Maternal Vascular Remodeling During Pregnancy in the Mouse Uterus
Published on: December 5, 2015
NK receptor interactions with MHC class I molecules in pregnancy
John Trowsdale1, Ashley Moffett
1Immunology Division, Department of Pathology, Tennis Court Road, Cambridge CB2 1QP, United Kingdom.
Polymorphisms in human leukocyte antigen (HLA) class I and killer cell immunoglobulin-like receptor (KIR) genes may influence pregnancy outcomes. The maternal KIR and fetal HLA-C interaction impacts fetal development and reproductive success.
Area of Science:
- Immunogenetics
- Reproductive immunology
- Maternal-fetal medicine
Background:
- Human leukocyte antigen (HLA) class I molecules and killer cell immunoglobulin-like receptors (KIRs) exhibit high genetic polymorphism.
- This diversity is thought to be driven by evolutionary pressure for disease resistance.
- Uterine Natural Killer (uNK) cells express KIR2D receptors that bind to HLA-C, the sole polymorphic class I molecule on trophoblast.
Purpose of the Study:
- To investigate the role of maternal KIR and fetal HLA-C interactions in pregnancy.
- To explore the impact of these interactions on maternal-fetal blood supply and reproductive success.
Main Methods:
- Analysis of genetic data related to HLA-C and KIR polymorphisms.
- Functional studies examining the maternal KIR/fetal HLA-C interaction in the decidua.
Main Results:
- Genetic and functional data suggest a significant role for the maternal KIR/fetal HLA-C interaction during pregnancy.
- This interaction may influence the optimal blood supply to the mother and fetus.
Conclusions:
- Allelic diversity in HLA-C and KIR2D may be driven by factors beyond infection resistance, including reproductive success.
- The maternal-fetal HLA-C and KIR interaction is a critical factor in successful pregnancy outcomes.
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