机构地区:[1]苏州大学附属第一医院江苏省血液研究所,215006
出 处:《中华微生物学和免疫学杂志》2015年第12期926-931,共6页Chinese Journal of Microbiology and Immunology
基 金:国家自然科学基金(81273226,81072435);江苏省医学创新团队与领军人才(LJ201138);江苏省临床医学科技专项(BL2014038,BL2013013);优势学科(PAPD)
摘 要:目的研究在HLA—A、B、C、DRB1、DQB1(10/10)全相合中供受者间HLA—DQA1高分辨等位基因频率分布及在临床中的应用价值。方法采用SSOP和SSP方法对非血缘HIA-10/10全相合造血干细胞移植的127对患者和供者,共计254份样本进行HLA—DQA1高分辨等位基因分型。结果在127对供患者中36对采用SSOP方法可直接判断分型结果,91对需采用高分辨SSP方法解决模棱两可的分型结果,除5对供患者HLA—DQA1等位基因错配但抗原相合外其余均为全相合。在127例无关供者中共检出16种DQA1等位基因,基因频率从高到低分别为DQA1^*02:01(19.3%),DQAI^*01:02(19.3%),DQA1^*03:02/03(17.0%),DQA1^*01:03(9.8%),DQA1^*06:01(9.1%),DQA1^*05:01(7.1%),DQA1^*05:05(5.9%),DQA1^*03:01(4.7%),DQA1^*01:04(2.4%),DQA1^*01:05(2.O%),DQA1^*01:01(1.2%),DQA1^*05:03(0.8%),DQA1^*05:08(0.8%),DQA1^*04:01(0.4%),DQA1^*05:06(0.4%)。患者与供者HLA—DQA1等位基因频率分布无统计学差异,但在患者样本中发现一例新基因提示为DQA1^*01:XX。在DQA1与DQm的单倍型频率与连锁不平衡分析中,最常见的单倍型是DQA1^*02:01—DQB1^*02:02(16.1%),其次为DQA1^*03:02/03-DQB1^*03:03(11.8%),DQA1^*01:03.DQB1^*06:01(9.1%),且DQA1^*02:01与DQB1^*02:02、DQA1^*03:02与DQB1^*03:03、DQA1^*01:03与DQB1^*06:01、HIA—DQA1^*06:01与DQB1^*03:01、DQA1^*05:01与DQB1^*02:01之间均存在强连锁关系(P〈0.001)。结论HLA-OQA1和DQm存在显著的连锁不平衡性,且DQA1的基因多态性远低于DQB1基因多态性,因此,在无关供者和患者HLA-10/10全相合基础上增加DQA1等位基因分型不能为造血干细胞移植供者选择提供更多的指导,但在HLAⅡ类�Objective To analyze the frequencies of HLA-DQA1 alleles and their clinical values in the donor-recipient HLA-A, -B, -C, -DRB1, -DQB1 (10/10) matched hematopoietic stem cell transplan- tation(HSCT). Methods This study recruited 127 patients who received allogeneic HSCT and 127 unrelated donors. High-resolution (High Res) DNA typing for HLA-DQA1 alleles were performed on the 254 subjects by using sequence specific oligonucleotide probes (SSOP) and high resolution of sequence specific primer( High Res SSP). Results The DQA1 allele genotypes of 36 pairs of donor-recipient were directly identified by using SSOP. The ambiguous DQA1 allele genotypes of the rest 91 pairs were identified by using High Res SSP. Among the 127 pairs of donor-recipient, 5 pairs were HLA-DQA1 alleles mismatched, while the others were all matched. No significant differences in the distribution of HLA-DQA1 alleles were observed between the donors and the recipients. Sixteen HLA-DQA1 alleles were detected in the 127 donors, which were DQA1 ^* 02 : 01 (19.3%), DQA1 ^* 01 : 02(19.3% ), DQA1 ^* 03 : 02/03 ( 17.0% ), DQA1 ^*01:03 (9.8%), DQA1^*06:01(9.1%), DQA1^*05:01(7.1%), DQA1^*05:05(5.9%), DQA1^* 03:01 (4.7%), DQA1^*01 : 04(2.4%), DQA1^*01:05(2.0%), DQA1^*01 : 01(1.2%), DQA1^* 05:03(0.8%), DQA1^*05 : 08(0.8%), DQA1^*04 : 01(0.4%), DQA1^*05 : 06(0.4%) from high to low frequency. Moreover, a new allele was detected in the patients. The haplotypes' frequencies and linkage disequilibrium(LD) analysis of HLA-DQA1 and HLA-DQB1 showed that the most common haplotype was DQA1 ^*02 : 01-DQB1 ^*02 : 02( 16.1% ), followed by DQA1 ^* 03 : 02/03-DQB1 ^*03 : 03 (11.8%) and DQA1 '01 : 03-DQB1 ^* 06 : 01 (9. 1% ). Stronger LD were observed between DQA1 ^* 02 : 01 and DQB1 ^* 02 : 02, DQA1 ^* 03 : 02 and DQB1 ^* 03 : 03, DQA1 ^* 01 : 03 and DQB1 ^* 06 : 01, HLA
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