应用PCR－SSP对异基因骨髓移植供受者HLA－DQA1位点的基因分型

为探索一种可靠性和灵敏性高的ＨＬＡⅡ类基因的配型方法，根据Ｏｌｅｒｕｐ提出的１６个特异性引物序列，用多聚酶链反应－序列特异性引物（ＰＣＲ－ＳＳＰ）方法，对ＤＱＡ＿１基因位点的多态性进行检测和分型，并与多聚酶链反应－序列特异性寡核苷酸探针杂交（ＰＣＲ－ＳＳＯＰＨ）及多聚酶链反应－单链构型多态性（ＰＣＲ－ＳＳＣＰ）检测结果进行比较，获得了一致的分型结果。ＰＣＲ－ＳＳＰ可分辨出ＤＱＡ＿１位点的纯合体和杂合体等位基因，并能检测出单一碱基的点突变；它将ＰＣＲ扩增和检测两个步骤合并为一次完成，操作更简便、快速。并已将ＰＣＲ－ＳＳＰ方法成功地用于１５对异基因骨髓移植的供、受者的分型。ＰＣＲ－ＳＳＰ作为基因分型的有效技术，可为骨髓来源提供直接的科学依据。

Genotyping of HLA-DQA1 for donor-recipient in allogeneic bone marrow transplantation by PCR-SSP

To explore a reliable,sensitive typing method for HLA gene,polymorphism of DQA1 gene locus was detected and typed by means of polymerase chain reaction-sequence specific primer(PCR-SSP)technique and the results were compared with those of PCR-sequence specific oligonucleotide primer hybridization and PCR-single strand conformation polymorphism.The results showed that PCR-SSP could detect homozygous and heterozygous alleles of DQA1 locus and single base point mutation,and proved to be simple,rapid and suitable for routine clinical application.