Association between HLA-E gene polymorphism and unexplained recurrent spontaneous abortion [RSA] in Iranian women

ABSTRACT

Background: Human leukocyte antigen-E [HLA-E]is a non-classical major histocompatibility complex [MHC] class I antigens which expressed on extra villous cytotrophoblast, which interacts with NKG2A, is an inhibitory receptor on natural killer [NK] cells and leading to down regulation of immune response in the maternal-fetal interface and provides maternal immune tolerance of the fetus