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Tetragametic chimerism detected in a healthy woman with mixed‐field agglutination reactions in ABO blood grouping
Author(s) -
Drexler Camilla,
Glock Barbara,
Vadon Maria,
Staudacher Erika,
Dauber EvaMaria,
Ulrich Silvia,
Reisacher Rosemarie B.K.,
Mayr Wolfgang R.,
Lanzer Gerhard,
Wagner Thomas
Publication year - 2005
Publication title -
transfusion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.045
H-Index - 132
eISSN - 1537-2995
pISSN - 0041-1132
DOI - 10.1111/j.1537-2995.2005.04304.x
Subject(s) - abo blood group system , buccal swab , genotyping , typing , agglutination (biology) , biology , genetics , serology , allele , human leukocyte antigen , genotype , antibody , antigen , gene
BACKGROUND: The case of a healthy woman with serologic blood group AB and her biologic father showing blood group O was investigated. Further analysis, including blood, buccal swabs, and nail clippings, revealed a tetragametic chimerism. STUDY DESIGN AND METHODS: Blood grouping was performed with standard gel centrifugation test cards, ABO genotyping by sequence‐specific primers (SSPs) and sequence‐based typing, and HLA Class I and II typing by standard NIH cytotoxicity testing and SSP. Additionally, short‐tandem‐repeat (STR) and variable‐number tandem–repeat (VNTR) typing was performed on blood, nail clippings, and buccal swab samples. The karyotype was analyzed by G‐banded chromosomes. RESULTS: The proposita's RBCs were typed AB with a mixed‐field agglutination whereas in molecular typing A , B, and O alleles were found. One paternal and two maternal haplotypes were determined by use of HLA typing. Interestingly, both paternal alleles were detected in 4 of 23 tested STR and VNTR loci only, with whole blood, nail clippings, and buccal swabs. The karyotype was identified as 46XX. The family members including the proposita's healthy twin children displayed no abnormal findings in tests performed. CONCLUSION: By investigation of DNA polymorphisms, it was possible to determine a rare case of tetragametic chimerism being the result of double parental contribution of nuclei.