RESUMO
<p><b>OBJECTIVE</b>To explore the molecular basis for an individual with CisAB subtype of the ABO blood group.</p><p><b>METHODS</b>ABO antigen and serum antibody of the proband were detected with a serological method. Exons 5 to 7 of the ABO gene were amplified with PCR and sequenced bidirectionally. Allele-specific amplification for exon 6 to 7 was also carried out.</p><p><b>RESULTS</b>The proband was assigned as a CisAB phenotype based on his serological characteristics. Heterozygous variations including 220C/T, 261G/del, 297A/G, 467C/T, 646A/T, 681A/G, 771C/T, 803G/C, 829A/G and 1009A/G of the ABO gene were identified through direct sequencing, which was assigned as CisAB01var/O02 genotype. Allele-specific amplification indicated that the proband carried an O02 allele and a CisAB01var allele. Compared with A102, the CisAB01var allele has two nucleotide substitutions at 803G>C and 1009A>G, which resulted in replacement of amino acid Gly by Ala at position 268 and Arg by Gly at position 337.</p><p><b>CONCLUSION</b>The CisAB subtype was identified with 803G>C and 1009A>G variants in the α1,3-N-acetyl-galactosaminyltransferase gene compared with that of the A102 allele.</p>
RESUMO
Objective To investigate the significance of measurement of the expression CD28 on tumor infiltrating lymphocytes in patients with stomach cancer.Methods Subjects for this investigation include the tumor tissues and its nearby normal tissues from 48 patients with stomach cancer.The levels of the expression of CD28, CD8 on tumor infiltrating lymphocytes were analyzed by flow cytometry.Results First, the levels of the expression of CD8+CD28+ and CD8-CD28+ on tumor infiltrating lymphocytes from the tumor tissues were remarkably lower than from its nearby normal tissues (P