The HLA-G 14bp gene polymorphism and decidual HLA-G 14bp gene expression in pre-eclamptic and normal pregnancies

J Reprod Immunol. 2008 Jul;78(2):158-65. doi: 10.1016/j.jri.2008.03.001.

Abstract

Trophoblast expression of the non-classical MHC, HLA-G, is considered essential for feto-maternal immune tolerance and successful placentation in pregnancy. The HLA-G 14bp polymorphism in the 3'-untranslated region (UTR) of the HLA-G gene has been reported to be associated with development of pre-eclampsia (PE). In this study, maternal (peripheral blood, n=54) and fetal (cord blood, n=57) HLA-G 14bp genotypes have been determined by PCR in pre-eclamptic and normal pregnancies. In addition, HLA-G 14bp gene expression in decidua basalis (n=59) was analyzed by RT-PCR. The pre-eclamptic syndrome was neither associated with the HLA-G 14bp genotype (maternal or fetal), nor with altered decidual HLA-G 14bp gene expression. Furthermore, the HLA-G 14bp mRNA expressed in decidua basalis was of fetal origin and all potential transcripts, as predicted from the fetal HLA-G 14bp genotype, were expressed. In contrast to previous findings, we found no correlation between the HLA-G 14bp polymorphism and fetal growth. In conclusion, the fetal HLA-G 14bp genotype is reflected in the decidual HLA-G mRNA splice form profile, but does not appear to be associated with increased risk for development of PE.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Alleles
  • Decidua / metabolism
  • Female
  • Gene Expression
  • Genetic Predisposition to Disease
  • Genotype
  • HLA Antigens / blood
  • HLA Antigens / genetics*
  • HLA Antigens / metabolism
  • HLA-G Antigens
  • Histocompatibility Antigens Class I / blood
  • Histocompatibility Antigens Class I / genetics*
  • Histocompatibility Antigens Class I / metabolism
  • Humans
  • Polymorphism, Genetic*
  • Pre-Eclampsia / genetics*
  • Pre-Eclampsia / metabolism
  • Pregnancy

Substances

  • HLA Antigens
  • HLA-G Antigens
  • Histocompatibility Antigens Class I