Study of RHD genes among RhD negative individuals in Hainan province,China / 中国输血杂志

ABSTRACT

Objective To understand the RHD gene profiles of RhD negative individuals in Hainan Han population,and provide reference to establish the right method for RHD genotyping.Methods RhD was tested by anti-globulin test, and RhDel and genuine RhD-negative phenotype were identified by absorption/elution method. RhD negative samples were further tested for RHD exons by PCR-SSP.The RhD negative samples with intact RHD genes were further analyzed by PCR-SSP for RHD introns 2, 10 and RHD?gene. Results Thirty-one (29.25%)cases of RhDel individuals were identified among 106 apparent RhD-negative individuals. All RhDel samples had RHD genes;67 cases of genuine RhD-negative had no RHD genes and 8 cases were partial D. All 31 RhDel samples had Din2 and Din10 but none had RHD?. Additionally, We detected exons 1,3,4,6,7,9 and 10 in one case of ccdEe sample. Conclusion The proportion of RhDel phenotype is high among apparent RhD-negative Hainanese, and total RHD exons can be detected in all RhDel samples. Polymorphisms of RHD gene are present among genuine RhD-negative Hainanese. There is no exon 5 in all 8 cases of partial D, which suggests that exon 5 specific amplification may be very important in RHD genotyping for Hainan Han population.