Identification of a Bw14 subtype and exploration for its molecular basis / 中华医学遗传学杂志
Chinese Journal of Medical Genetics
;
(6): 755-758, 2017.
Article
in Chinese
| WPRIM
| ID: wpr-344181
ABSTRACT
<p><b>OBJECTIVE</b>To identify a rare subtype of the ABO blood group system and explore its molecular basis.</p><p><b>METHODS</b>Based on a standard serological assay, ABO subtype and haplotype were analyzed through PCR amplification of the 7 exons and adjacent introns of the ABO gene and TA clone sequencing.</p><p><b>RESULTS</b>Forward typing showed a B type, while reverse typing demonstrated an extremely weak anti-B on routine gel analysis, which indicated a forward and reverse typing discrepancy. Absorption-elution testing confirmed that there was no A antigen on the surface of patient's red blood cells. Sequencing of the ABO gene showed a G>A exchange at position 523 in exon 7, which resulted in a Val to Met substitution at codon 175. Clone sequencing of the amplificons of the ABO gene showed an ABO* Bw14/O01 heterozygote genotype.</p><p><b>CONCLUSION</b>Molecular method is useful for the identification of ambiguous blood groups. A 523G>A substitution of the ABO gene resulting in a Bw14 subtype probably underlies the weak B phenotype noted in the patient.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Phenotype
/
ABO Blood-Group System
/
Polymerase Chain Reaction
/
Exons
/
Genetics
/
Genotype
Type of study:
Diagnostic study
/
Prognostic study
Limits:
Humans
/
Male
Language:
Chinese
Journal:
Chinese Journal of Medical Genetics
Year:
2017
Type:
Article
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