title: Anti-D alloimmunisation in pregnant women with DEL phenotype in China.
abstract: OBJECTIVE
  To analyse anti-D alloimmunisation in pregnant women with D-elute (DEL) phenotype in China, for developing a predictive model to evaluate whether a person with the DEL phenotype can receive RhD-positive blood.
  
  
  BACKGROUND
  Alloanti-D acquired by pregnancy or transfusion is one of the major causes of both haemolytic disease among newborns and haemolytic transfusion reactions. To date, there is little data available about the antigenic properties and immunogenicity of extremely weak D variants known as DEL.
  
  
  METHODS
  RHD genotyping and D epitope mapping were performed using gene sequencing and comprehensive immunohaematological methods, respectively. DEL pregnant women carrying an RhD-positive fetus were tested for the presence of alloanti-D.
  
  
  RESULTS
  A total of 130 of 142 (91·5%) pregnant women with a DEL phenotype were confirmed to carry the RHD (K409K) allele. Among 12 DEL women who appeared to have RHD-CE-D hybrid alleles, there were 1 RHD-CE (4-7)-D, 7 RHD-CE(4-9)-D, and 4 RHD-CE (2-5)-D alleles. Alloanti-D antibodies were detected in 6 of 142 DEL women, and all the six women had the partial DEL phenotype.
  
  
  CONCLUSIONS
  The data indicate that partial DEL women appear at risk of alloimmunization to the D antigen. RhD immune globulin prophylaxis is necessary for partial DEL women. Partial DEL patients should receive only RhD-negative RBCs, whereas DEL patients with complete expression of antigen can safely receive RhD-positive RBCs.
authors.affiliation: The Department of Blood Transfusion, Affiliated Provincial Hospital of Anhui Medical University, Hefei, Anhui, China.|The Department of Laboratory Medicine, Affiliated Provincial Hospital of Anhui Medical University, Hefei, Anhui, China.
authors.forename: M
authors.initials: M
authors.lastname: Wang
authors.affiliation: The Department of Laboratory Medicine, Affiliated Provincial Hospital of Anhui Medical University, Hefei, Anhui, China.
authors.forename: B L
authors.initials: BL
authors.lastname: Wang
authors.affiliation: The Department of Blood Transfusion, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China.
authors.forename: W
authors.initials: W
authors.lastname: Xu
authors.affiliation: The Department of Epidemiology & Biostatistics, School of Public Health, Anhui Medical University, Hefei, Anhui, China.
authors.forename: D D
authors.initials: DD
authors.lastname: Fan
authors.affiliation: The Department of Epidemiology & Biostatistics, School of Public Health, Anhui Medical University, Hefei, Anhui, China.
authors.forename: M L
authors.initials: ML
authors.lastname: Peng
authors.affiliation: The Department of Blood Transfusion, Affiliated Provincial Hospital of Anhui Medical University, Hefei, Anhui, China.
authors.forename: J
authors.initials: J
authors.lastname: Pan
authors.affiliation: The Department of Laboratory Medicine, Affiliated Provincial Hospital of Anhui Medical University, Hefei, Anhui, China.
authors.forename: P
authors.initials: P
authors.lastname: Yao
authors.affiliation: The Department of Blood Transfusion, Affiliated Provincial Hospital of Anhui Medical University, Hefei, Anhui, China.
authors.forename: G M
authors.initials: GM
authors.lastname: Jiang
authors.affiliation: The Department of Blood Transfusion, Affiliated Provincial Hospital of Anhui Medical University, Hefei, Anhui, China.
authors.forename: X J
authors.initials: XJ
authors.lastname: Wan
mesh_terms: D000293:Adolescent; D000328:Adult; D000483:Alleles; D018604:Epitope Mapping; D005260:Female; D005331:Fetomaternal Transfusion / Q000235:genetics* / Q000276:immunology; D005787:Gene Frequency; D060005:Genotyping Techniques; D006801:Humans; D008297:Male; D008875:Middle Aged; D011247:Pregnancy; D012203:Rh Isoimmunization / Q000235:genetics* / Q000276:immunology; D012204:Rh-Hr Blood-Group System / Q000235:genetics* / Q000276:immunology; D018029:Rho(D) Immune Globulin / Q000235:genetics / Q000276:immunology
chemical_list: C061961:RHO(D) antibody; D012204:Rh-Hr Blood-Group System; D018029:Rho(D) Immune Globulin; C026410:Rho(D) antigen
keywords: HDN; RBC transfusion; alloimmunization; donors; partial DEL