title: [Expression of HLA-G protein in trophoblast cells].
abstract: OBJECTIVE
  To investigate the expression of human leucocyte antigen protein G (HLA-G) in different trophoblast cells and different stages of pregnancy.
  
  
  METHODS
  The expression of HLA-G protein in normal placenta and trophoblasts of different trimesters was detected using immunohistochemical method (SP).
  
  
  RESULTS
  HLA-G protein expression exhibited spatio-temporal changes, which located in the extravillous trophoblast (EVT) and was higher in the placenta of the first and second trimesters while lower in the third trimester (P<0.01).
  
  
  CONCLUSIONS
  HLA-G protein expression in different stages of pregnancy and different trophoblasts may be related to the controlled invasion of the trophoblast.
authors.affiliation: Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.
authors.forename: Yan-qiu
authors.initials: YQ
authors.lastname: Wang
authors.forename: Shi-ling
authors.initials: SL
authors.lastname: Chen
authors.forename: Fu-qi
authors.initials: FQ
authors.lastname: Xing
mesh_terms: D000328:Adult; D005260:Female; D006680:HLA Antigens / Q000096:biosynthesis* / Q000235:genetics; D059951:HLA-G Antigens; D015395:Histocompatibility Antigens Class I / Q000096:biosynthesis* / Q000235:genetics; D006801:Humans; D010920:Placenta / Q000378:metabolism; D011247:Pregnancy; D011261:Pregnancy Trimester, First / Q000378:metabolism*; D011262:Pregnancy Trimester, Second / Q000378:metabolism*; D014327:Trophoblasts / Q000378:metabolism*
chemical_list: D006680:HLA Antigens; D059951:HLA-G Antigens; D015395:Histocompatibility Antigens Class I