中华骨髓库造血干细胞捐献志愿者HLA基因分型中模棱两可结果解决方案的探讨  

Study on Resolution Program of Ambiguous HLA Genotypes for the Bone Marrow Donors of China Marrow Donor Program

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作  者:程良红[1] 邹红岩[1] 金士正[1] 李桢[1] 高素青[1] 王大明[1] 何柳媚[1] 朱为刚[1] 

机构地区:[1]深圳市血液中心,广州深圳518035

出  处:《国际输血及血液学杂志》2011年第5期289-294,共6页International Journal of Blood Transfusion and Hematology

基  金:广东省科技计划项目,广东省医学科研基金项目,深圳市科技计划项目

摘  要:目的探讨中华骨髓库造血干细胞捐献志愿者HLA基因分型中模棱两可结果的解决方案。方法采用聚合酶链式反应(PCR)-测序分型技术(SBT)对20621名中华骨髓库供者的HLA—A、B、DRBl基因进行高分辨分型,并对其中的模棱两可分型结果进行精确分型。根据精确分型后的HLA等位基因频率计算模棱两可结果中真基因型的相对概率,进而对应用基因型相对概率直接鉴别模棱两可分型结果的方法进行评价。结果20621名骨髓库供者HLA-A、B、DRB1基因PCR-SBT分型中模棱两可结果的样本比例分别为53.88%(11110/20621)、66.43%(13697/20621)和70.95%(14630/20621),其中模棱两可等位基因对的比例分别为1.34%(277/20621)、23.30oA(4804/20621)和58.76%(12116/20621),模棱两可基因型的比例分别为52.54%(10834/20621)、56.13%(11574/20621)和59.76%(12323/20621)。15种模棱两可等位基因对的确认结果中,仅B*07:05/07:06和DRB1*08:03/08:14检出两种等位基因,其他13种均只检出1种等位基因。11110个HLA—A、13697个HLA-B和14630个HLA—DRB1基因的模棱两可标本中,真基因型相对概率高于95%的样本比例分别为98.27%(10918/11110)、98.46%(13486/13697)和99.47%(14553/14630)。其中真基因型相对概率低于50%的基因型可见于A*01:01/11:04、A*24:03/33:10、A*33:01/66:01、B*35:27/55:02、B*38:01/78:02、B*44:02/55:16、B*53:01/55:01、DRB1*03:02/13:01、DRB1*04:10/13:03、DRB1*11:06/13:03和DRB1*12:01/15:04等。从整体看,20621份HLA—A、B、DRB1基因的PCR—sBT分型数据中,在不进行任何附加实验的情况下,仅根据基因型相对概率直接确定模棱两可标本基因分型结果的准确性均超过了98%,分别为99.07%(20429/20621)、98.98%(2041Objective To study the resolution program of ambiguous HLA genotypes for China Marrow Donor Program (CMDP). Methods 20 621 donors from CMDP were genotyped by PCR-SBT method for their HLA-A, B and DRB1 loci. The ambiguous genotyping samples were identified by using other molecular biological methods. Furthermore, the relative frequencies of true genotype for ambiguous samples were calculated by allele frequencies which from the above accurately genotyping results. Result The ratio of ambiguous genotypes was 53.88%(11 110/20 621), 66.43% (13 697/20 621) and 70.95% (14 630/20 621) for HLA-A, 13, DRB1 locus in the 20 621 donors, respectively. Among them, the ratio of ambiguous allelic-pairs for HLA-A, B, DRB1 locus was 1.34 % (277/20 621), 23.30% (4 804/20 621) and 58.76% (12 116/20 621), respectively. The ratio of ambiguous genotypes was 52.54 % (10 834/20 621), 56.13% (11 574/20 621) and 59.76% (12 323/20 621), respectively. Two alleles were found only B* 07:05/07:06 and DRB1 s 08:03/08:14 allelic-pairs in 15 kinds of allelic-pair, the other 13 kinds only found one allele. Among the 11 110 HLA-A, 13 697 HLA-B and 14 630 HLA-DRB1 ambiguity samples, The relative frequencies of 98.27%(10 918/11 110) HLA-A, 98.46%(13 486/13 697)HLA-B and 99.47% (14 553/14 630)HLA-DRB1 samples were higher than 95%. The genotype with relative frequency which were lower than 50% could be found in As 01:01/11:04, As 24;03/33:10, As 33:01/66:01, Bs 35:27/ 55:02, B s 38:01/78:02, B s 44: 02/55: 16, B s 53: 01/55: 01, DRB1 s 03: 02/13: 01, DRB1 s 04:10/ 13:03, DRB1 s 11:06/13,03 and DRB1 s 12: 01/15: 04, etc. The accuracies of HLA-A, B and DRB1 genotypes by PCR-SBT method were all higher than 98%[-99.07% (20 429/20 621), 98. 98% (20 410/ 20 621) and 99.63% (20 544/20 621) respectively], which just directly based on the relative frequency but discounted any other molecular biological methods to resolve the ambiguities. Each locus h

关 键 词:人类白细胞抗原 模棱两可分型结果 相对概率 

分 类 号:R440[医药卫生—诊断学]

 

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