title: Antigens HLA-G, sHLA- G and sHLA- class I in reproductive failure.
abstract: It can be supposed that relation between HLA-G polymorphism and sHLA-G protein expression are associated with successful embryo implantation and pregnancy maintenance. The aim of the study was the estimation specific differences in expression of sHLA-G and sHLA- class I antigens in women with reproductive failure in comparison with fertile women. The study sample enrolled 80 women, divided into 2 groups. The study group (B) enrolled 60 women with reproductive failure including 20 women with 3 recurrent spontaneous abortions in the first trimester of pregnancy (RSA), 20 women with empty sac (ES) and 20 women with 3 consecutive in-vitro fertilization failures (IVFf). The control group (C) enrolled 20 fertile women with at least 2 children. Soluble HLA- class I antigens (sHLA-I) and soluble HLA-G (sHLA-G) were determined using ELISA test kits from IBio Vendor Labolatory Medicine, Inc. HLA-G allele found in individuals in our study were identified by comparing the obtained bp sequences of exon 2., 3. and 4. with bp sequences of HLA-G antigen published at the Nolan Research Institute website. The highest concentration of sHLA-I is noted among women with HLA-G 10401 allele which differed significantly for the mean sHLA-I concentration calculated for all the remaining alleles (p<0.0001). The most prevalent alleles were: HLA-G 10101, 10102 and 10108 with sHLA-I concentrations among women bearing those alleles significantly lower in comparison to the HLA-G 10401 carriers (p<0.001). Allele 10101 and 10102 was related to the lower significantly plasma sHLA-I concentrations than 10108 allele (p<0.02). Lowest mean sHLA-G values were observed in the IVFf group with significant difference from the remaining groups (p<0.05). To conclude, sHLA-G molecules is associated to certain HLA-G alleles and imply that sHLA-G levels are under genetic control. Low concentration sHLA-G seems to be prognostically important in IVF failure.
authors.affiliation: Chair for Obstetrics and Gynecology, Department for Feto-Maternal Medicine, Pomeranian Medical University in Szczecin, Szczecin, Poland. olimpiasipak-szmigiel@wp.pl
authors.forename: Olimpia
authors.initials: O
authors.lastname: Sipak-Szmigiel
authors.forename: Elzbieta
authors.initials: E
authors.lastname: Ronin-Walknowska
authors.forename: Cezary
authors.initials: C
authors.lastname: Cybulski
authors.forename: Tomasz
authors.initials: T
authors.lastname: Plonka
authors.forename: Jan
authors.initials: J
authors.lastname: Lubiński
mesh_terms: D000022:Abortion, Spontaneous / Q000235:genetics*; D000483:Alleles; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D005838:Genotype; D006680:HLA Antigens / Q000097:blood / Q000235:genetics*; D059951:HLA-G Antigens; D015395:Histocompatibility Antigens Class I / Q000097:blood / Q000235:genetics*; D006801:Humans; D007247:Infertility, Female / Q000235:genetics*; D007962:Leukocytes / Q000378:metabolism; D011110:Polymorphism, Genetic / Q000235:genetics; D011247:Pregnancy; D011261:Pregnancy Trimester, First
chemical_list: D006680:HLA Antigens; D059951:HLA-G Antigens; D015395:Histocompatibility Antigens Class I