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Presence of RHD in serologically D–, C/E+ individuals: a European multicenter study
Author(s) -
Gassner Christoph,
Doescher Andrea,
Drnovsek Tadeja Dovc,
Rozman Primoz,
Eicher Nicole I.,
Legler Tobias J.,
Lukin Sergey,
Garritsen Henk,
Kleinrath Thomas,
Egger Bernd,
Ehling Rainer,
Körmöczi Günther F.,
KilgaNogler Susanne,
Schoenitzer Diether,
Petershofen Eduard K.
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.0041-1132.2004.04211.x
Subject(s) - allele , typing , rh blood group system , antigen , population , biology , medicine , immunology , genetics , antibody , gene , environmental health
BACKGROUND: RHD blood group alleles with reduced or absent antigen expression are a clinically significant and heterogeneous group. Study design and methods: To detail population genetics data on apparently D– individuals in central Europe, a six‐center study was performed with participants from Austria, Germany, Slovenia, Switzerland, and Russia. A total of 1700 serologically D– samples, positive for C and/or E, were investigated. RESULTS: Observed unexpressed RHD alleles were 59 RHD‐CE‐D + hybrid alleles, 9 apparently regular RHD , 1 new RHD (Y401X); DELs were 8 RHD (M295I), 6 RHD (IVS3+1G>A), and 1 new RHD (X418L); and weakly expressed RHD s were 2 weak D type 5, 1 weak D type 1, 1 RHD category VI type 1, and 1 novel weak D type 26. Although weak D type 26 was shown to have one of the lowest D antigen densities ever observed, it gave rise to anti‐D immunization in a transfused D– individual. CONCLUSION: The relative occurrence of RHD among serologically D– samples, positive for C and/or E, differed significantly in the investigated central European regions. Considering the growing use of molecular typing techniques, correct identification of blood group alleles with scarce or missing antigen expression is of utmost clinical importance and requires reliable population‐based frequency data.