title: The 14 bp deletion polymorphisms in HLA-G gene play an important role in the expression of soluble HLA-G in plasma.
abstract: Soluble human leukocyte antigen-G (sHLA-G) functions as a multiple immunoregulator. A 14 bp insertion (+14 bp)/deletion (-14 bp) polymorphism in exon 8 of the HLA-G gene has been proposed to be associated with HLA-G mRNA stability and the expression of HLA-G. In the current study, a total of 150 normal Chinese Han population had been genotyped for the +14 bp/-14 bp polymorphism, and the expression of plasma sHLA-G was determined with enzyme-linked immunosorbent assay in these case-matched plasma. Data showed that genotype of 14 bp polymorphism was significantly associated with sHLA-G expression. Plasma sHLA-G level with the +14 bp/+14 bp genotype was dramatically lower than that with +14 bp/-14 bp (P = 0.004) and -14 bp/-14 bp genotypes (P = 0.003), while no dramatic difference was observed between the +14 bp/-14 bp and -14 bp/-14 bp genotypes (P > 0.05). In both males and females, plasma sHLA-G with the +14 bp/+14 bp genotype was also significantly lower when compared with other two respective 14 bp genotypes. Data also showed that sHLA-G expression was unrelated to gender. This study suggests that the 14 bp deletion polymorphism in the HLA-G gene plays an important role in sHLA-G expression and that interpretation of the potential biological functions of sHLA-G should be made with caution, taking the polymorphism into consideration.
authors.affiliation: Department of Laboratory Medicine, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China.
authors.forename: X-Y
authors.initials: XY
authors.lastname: Chen
authors.forename: W-H
authors.initials: WH
authors.lastname: Yan
authors.forename: A
authors.initials: A
authors.lastname: Lin
authors.forename: H-H
authors.initials: HH
authors.lastname: Xu
authors.forename: J-G
authors.initials: JG
authors.lastname: Zhang
authors.forename: X-X
authors.initials: XX
authors.lastname: Wang
mesh_terms: D000328:Adult; D000483:Alleles; D005260:Female; D015870:Gene Expression; D005787:Gene Frequency; D005838:Genotype; D006680:HLA Antigens / Q000097:blood* / Q000235:genetics*; D059951:HLA-G Antigens; D015395:Histocompatibility Antigens Class I / Q000097:blood* / Q000235:genetics*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic; D017384:Sequence Deletion / Q000235:genetics
chemical_list: D006680:HLA Antigens; D059951:HLA-G Antigens; D015395:Histocompatibility Antigens Class I