Abstract
To delineate the blood group for a pair of twins with inconclusive ABO blood typing result. Serological test for blood group was carried out by using ABO and Rh Blood Grouping Cards (Microcolumn Gel Immunoassay). Sequence specific primer-PCR (PCR-SSP), direct sequencing and TA clone sequencing were used to analyze the ABO gene. Genetic status was analyzed by using 16 short tandem repeat (STR) markers. Red blood cells of the twins displayed 2+ mixed agglutination phenomenon with anti-A, anti-A1 and anti-E. PCR-SSP and DNA sequencing of exons 6 to 7 revealed that they have an ABO*O.01.01/ABO*O.01.02 genotype. DNA sequencing of microsatellite enhancer region revealed presence of A gene. STR analysis revealed more than two haplotypes for 9 loci between the twins. After clustered by anti-A, the red blood cells were divided into two groups: A, CcDEe and O, CcDee, respectively. Serological and molecular techniques have characterized the twins as blood group chimeras.
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Schedule a callMore From: Zhonghua yi xue yi chuan xue za zhi = Zhonghua yixue yichuanxue zazhi = Chinese journal of medical genetics
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