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非血缘异基因造血干细胞移植后供者特异性aKIR基因的分布特征 被引量:1

Distribution of donor-specific aKIR after unrelated allogeneic hematopoietic stem cell transplantation
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摘要 目的分析非血缘异基因造血干细胞移植(allo-HSCT)后可供检测的供者特异性激活性杀伤细胞免疫球蛋白样受体(aKIR)基因的分布、比例及在临床中的应用价值。方法采用序列特异性引物聚合酶链反应(PCR-SSP)方法,回顾性分析216对供受者KIR基因分型,探讨可供检测的供者特异性aKIR的临床价值。结果在216例患者接受非血缘HSCT后可检测到供者特异性KIR基因为53.7%(116/216),在供受者KIR基因型不合中占78.3%(112/143),在供受者KIR基因型相合中占5.5%(4/73)。116例患者可检测到供者特异性KIR,99.1%(115/116)为aKIR基因。55对供受者KIR基因型为Bx-AA,可分别检测Bx1基因型中KIR3DS1、KIR2DL5A、KIR2DS5、KIR2DS1;Bx2基因型中KIR3DS1、KIR2DL5A、KIR2DS3、KIR2DS1;Bx3基因型中KIR2DS2、KIR2DL2;Bx4基因型中KIR2DS2、KIR2DL2、KIR3DS1、KIR2DL5A、KIR2DS5、KIR2DS1。44对供受者AA-AB不合中,有16对可检测供者特异性的KIR2DS4(FUL)基因。在143对供受者KIR基因型不合中,可检测供者特异性KIR基因频率由高到低分别为KIR2DS1(35.7%)、KIR3DS1(32.9%)、KIR2DS5(29.4%)、KIR2DS4(FUL)(25.9%)、KIR2DL2(25.2%)、KIR2DS2(24.5%)、KIR2DS3(21.7%)、KIR3DL1(8.4%)。结论非血缘allo-HSCT后可检测的供者特异性aKIR基因主要分布在供受者KIR基因型不合中,且因供受者KIR基因型不同而有差异,但在频率较高的KIR-AA、Bx1、Bx2、Bx3、Bx4中有供者特异性较高的aKIR,其为研究aKIR基因对移植预后的影响奠定了实验基础。 ObjectiveTo analyze the distribution and proportion of donor-specific activated killer cell immunoglobulin like receptor (aKIR) genes and their clinical application values in unrelated allogeneic hematopoietic stem cell transplantation (allo-HSCT) .MethodsRetrospective analyses of KIR genotyping using polymerase chain reaction with sequence specific primers (PCR-SSP) were performed in 216 pairs of donors and recipients.ResultsThe frequency of donor-specific KIR genes was 53.7% (116/216) in 216 patients receiving unrelated allo-HSCT, with the frequency of 78.3% (112/143) in the KIR genes mismatched group and 5.5% (4/73) in matched group. Of the 116 patients with detectable donor-specific KIR genes, 99.1% (115/116) patients had various donor-specific aKIR genes. Among 55 pairs of donors' KIR-Bx genotype and patients' KIR-AA genotype group, the most commonly observed genotypes were Bx1, Bx2, Bx3, Bx4, in which the donor-specific KIR genes were respectively KIR 3DS1, 2DL5A, 2DS5, 2DS1; KIR 3DS1, 2DL5A, 2DS3, 2DS1; KIR 2DS2, 2DL2; KIR 2DS2, 2DL2, 3DS1, 2DL5A, 2DS5, 2DS1. Of 44 pairs of donors' KIR-AA genotype and patients' KIR-Bx (AB) genotype group, 36.4% (16/44) recipients had donor-specific KIR2DS4 (FUL) gene. In 143 pairs of KIR mismatched group, the frequencies of donor-specific KIR genes were KIR2DS1 (35.7%) , KIR3DS1 (32.9%) , KIR2DS5 (29.4%) , KIR2DS4 (FUL) (25.9%) , KIR2DL2 (25.2%) , KIR2DS2 (24.5%) , KIR2DS3 (21.7%) and KIR3DL1 (8.4%) , respectively.ConclusionThe donor-specific aKIR genes mainly existed in KIR mismatched group after unrelated allo-HSCT, and the different pairs of donors' and patients' KIR genotypes led to the diverse donor-specific aKIR. But there were higher specific aKIR genes in higher frequency of KIR AA, Bx1, Bx2, Bx3, Bx4 genotypes. All these can provide the experimental basis for studying the role of the donor-specific aKIR genes on the prognosis of HSCT.
出处 《中华血液学杂志》 CAS CSCD 北大核心 2017年第5期421-426,共6页 Chinese Journal of Hematology
基金 国家自然科学基金(81671549、81600142、81273266、81072435) 江苏省医学创新团队与领军人才(LJ201659) 江苏省临床医学科技专项(BL2014038、BL2013013) 江苏高校优势学科建设工程(PAPD) 血液学协同创新中心
关键词 杀伤细胞 天然 受体 KIR 造血干细胞移植 Killer cells, natural Receptors, KIR Hematopoietic stem cell transplantation
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