HLA-DRB1高分辨测序分型与48例非亲缘性脐血移植者GVHD相关性分析

1998年6月至2003年7月，广州脐血库向国内21家移植中心提供非亲缘异基因脐血移植54例。本研究采用PCR产物直接测序法对HLA—DRB1进行高分辨分型（PCR—sequencing based typingPCR—SBT），并结合HLA—SSP低分辨分型结果，探讨非亲缘性脐血移植供／受者HLA—DRB1等位基因及其亚型与脐血移植GVHD发生率的关系。利用盐析或柱提法提取48例非亲缘性脐血及移植患者全血DNA，采用HLA—SBT方法分别对HLA—DRB1等位基因进行高分辨分型，并与HLA—SSP（HLA—sequencing specific primers）低分辨结果进行比较分析。结果表明：采用双盲法对48例非亲缘性脐血移植供／受者样本HLA—DRB1进行高分辨分型，结果HLA—DRB1等位基因亚型匹配全相合病例的GVHD发生率（25％）显著低于不完全相合病例的GVHD发生率（65．6％）（P=0．008）。结论：对HLA—DRB1采用高分辨分型方法在非亲缘性脐血移植HLA分型方面具有重要的临床应用价值。

Correlative Analysis between HLA High Resolution Typing and GVHD in 48 Cases Received Unrelated Umbilical Cord Blood Transplantation

Unrelated umbilical cord blood units for 54 cases in 21 transplant centers were provided by Guangzhou Cord Blood Bank in China from 1998 to 2003. This study was aimed to identify HLA-DRB1 alleles by means of PCR sequencing based typing methods (SBT) and to analyze the correlation between HLA-DRB1 alleles and GVHD in unrelated umbilical cord blood transplantation (UCBT). 48 out of 54 patients received UCBT were followed up. DNA were extracted from cryopreservation blood of recipients/donors with UCBT, HLA-DRB1 alleles typing were done by SBT. Compared with low resolution results of HLA-DRB1 alleles, high resolution results were analyzed to see any correlation between HLA-DRB1 alleles and GVHD. by double-blind statistically analysis of HLA-DRB1 high resolution in 48 donor/recipient typings in UCBT. The results showed that the incidence of GVHD (25%) in patients who has HLA-DRB1 alleles matched with donors significantly lower (65.6%) than that in the patients with HLA-DRB1 alleles mismatched (P=0.008). It is concluded that HLA-DRB1 by high resolution typing method is important in clinical application in UCBT.