RESUMEN
【Objective】 To explore the blood group changes of two acute myeloid leukemia patients with suspected O type, and their relationship with the therapeutic effect. 【Methods】 Serological analysis of ABO blood group of patients was carried out by microcolumn gel method, tube method and absorption-elution test, ABO blood group genotyping was performed by microfluidic chip method. Exons E2 to E7 of ABO gene were amplified by PCR and sequenced by Sanger method. 【Results】 The forward typing of two cases were both O type, but the reverse typing were both A type. The absorption-elution test results all showed detection of antigen A. ABO gene phenotype of the two cases were both A, with genotyping results as A102/A102 and A102/O01, respectively. Sequencing results showed that SNP sites of ABO blood group were 467T/T, 261G/delG and 467C/T, respectively.In one case, the intensity of anti-A agglutination reaction changed significantly from weak to strong with the progress of treatment. 【Conclusion】 For clinical samples of acute myeloid leukemia patients with ABO forward and reverse typing discrepancy and suspected O type, the result of reverse typing should be valued, and absorption-elution test should be performed to further confirm the ABO blood type combining the genetic test results, so as to develop appropriate blood transfusion strategies for patients.
RESUMEN
Objective@#To explore the serological and genotypic characteristics of a pedigree with B(A).06 subtype.@*Methods@#Serological methods was used to identify the ABO phenotypes. Exons 6 and 7 of the ABO gene and flanking regions were subjected to direct sequencing and TA clonal sequencing in order to determine the genotype of individuals with inconsistent results for forward and reverse serological typing.@*Results@#Among 12 individuals from 4 generations, 5 were identified with a AwB phenotype, along with a c. 803C>G mutation in exon 7 of the B allele, which was named as B(A).06. The B(A).06/O.01.01 phenotype may be easily missed due to its weak anti-A antibody in the serum upon initial serological test.@*Conclusion@#A B(A).06 subtype family was identified. The serological phenotype of individuals carrying the B(A).06 allele may be affected by the opposite DNA strand.
RESUMEN
OBJECTIVE@#To explore the serological and genotypic characteristics of a pedigree with B(A).06 subtype.@*METHODS@#Serological methods was used to identify the ABO phenotypes. Exons 6 and 7 of the ABO gene and flanking regions were subjected to direct sequencing and TA clonal sequencing in order to determine the genotype of individuals with inconsistent results for forward and reverse serological typing.@*RESULTS@#Among 12 individuals from 4 generations, 5 were identified with a AwB phenotype, along with a c.803C>G mutation in exon 7 of the B allele, which was named as B(A).06. The B(A).06/O.01.01 phenotype may be easily missed due to its weak anti-A antibody in the serum upon initial serological test.@*CONCLUSION@#A B(A).06 subtype family was identified. The serological phenotype of individuals carrying the B(A).06 allele may be affected by the opposite DNA strand.