title: Genotyping of samples lacking expected antibodies in ABO blood group.
abstract: We report nine donations with ABO inconsistency in reverse typing caused by partly or entirely missing antibodies. A and B antigens and antibodies were examined by serological blood typing, and ABO deoxyribonucleic acid (DNA) analyses were performed by sequence-specific priming and sequencing. A B101 allele was demonstrable in a case with O phenotype. The molecular mechanisms in deficiency of natural ABO antibody could be partly clarified. The ABO genotyping technique is an accurate method for determining the blood samples involved in ABO grouping discrepancies and is a valuable complement to serology for correct determination of donor blood status. The mechanisms involved in the absence of potent natural antibodies directed against A and B antigen lacking on an individual's own red cell membranes remain to be further investigated.
authors.affiliation: ShenZhen Institute of Transfusion Medicine, ShenZhen, GuangDong, China. zhihui-deng@yahoo.com.cn
authors.forename: Zhi-Hui
authors.initials: ZH
authors.lastname: Deng
authors.forename: Jian-Qiang
authors.initials: JQ
authors.lastname: Zeng
authors.forename: Qiong
authors.initials: Q
authors.lastname: Yu
authors.forename: Yu-Qing
authors.initials: YQ
authors.lastname: Su
authors.forename: Yan-Lian
authors.initials: YL
authors.lastname: Liang
authors.forename: Liang
authors.initials: L
authors.lastname: Lu
authors.forename: Wei-Gang
authors.initials: WG
authors.lastname: Zhu
authors.forename: Bao-Cheng
authors.initials: BC
authors.lastname: Yang
mesh_terms: D000017:ABO Blood-Group System / Q000235:genetics*; D000293:Adolescent; D000328:Adult; D000906:Antibodies; D005260:Female; D005838:Genotype; D006801:Humans; D008297:Male; D010641:Phenotype
chemical_list: D000017:ABO Blood-Group System; D000906:Antibodies