Molecular background of Rh D-positive, D-negative, D(el) and weak D phenotypes in Chinese.
OBJECTIVE
The aim of this study was to elucidate the genetic background of D-negative and D(el) in the Chinese population.


METHODS
We investigated nine D-positive, 76 D-negative, 26 D(el) and three weak D Chinese individuals by amplification and sequencing of the complete coding region of the RHD gene from genomic DNA. A new RHD polymerase chain reaction with sequence-specific primers (PCR-SSP) method was developed with optimized specificity for typing Chinese individuals.


RESULTS
In D-positive samples the RHD sequence was in complete concordance with RHD in other populations. In 12 of 76 (15.8%) D-negative individuals we detected regions of RHD. Three new alleles were found. All 26 D(el), as well as two weak D, individuals carried an RHD 1227A allele. In the remaining weak D sample we identified a weak D type 15.


CONCLUSIONS
It should now be possible to correctly predict the RhD phenotype in Chinese subjects. D(el) can also be designated as a particular weak D type.
Department of Transfusion Medicine, University of Göttingen, Robert-Koch-Strasse 40, 37075 Göttingen, Germany.
C-P
CP
Shao
J-H
JH
Maas
Y-Q
YQ
Su
M
M
Köhler
T J
TJ
Legler
D000483:Alleles; D044466:Asian People / Q000235:genetics; D002681:China / Q000453:epidemiology; D017931:DNA Primers / Q000592:standards; D005787:Gene Frequency; D005838:Genotype; D006801:Humans; D010641:Phenotype; D016133:Polymerase Chain Reaction; D012204:Rh-Hr Blood-Group System / Q000235:genetics*; D012680:Sensitivity and Specificity
D017931:DNA Primers; D012204:Rh-Hr Blood-Group System