Blood:HLA-B先导基因型预测HLA错配无血缘关系供体HCT的预后

2020-06-07 QQY MedSci原创

来自HLA不匹配的无血缘关系的捐赠者的造血细胞移植(HCT)可以治愈危及生命的血液疾病,但其成功率受到移植物抗宿主病(GVHD)的限制。HLA-B先导基因在第2号位置上编码蛋氨酸(M)或苏氨酸(T),

来自HLA不匹配的无血缘关系的捐赠者的造血细胞移植(HCT)可以治愈危及生命的血液疾病,但其成功率受到移植物抗宿主病(GVHD)的限制。HLA-B先导基因在第2号位置上编码蛋氨酸(M)或苏氨酸(T),产生TT、MT或MM基因型。二态性的HLA-B先导基因可预测HLA-B-错配的HCT的GVHD风险。如果先导基因还会影响其他HLA-错配移植情况的预后,那以后可以根据这一点改善治疗策略从而大大改善患者的预后。

Petersdorf等人确定了1988年-2016年期间从HLA-A、-B、-C、-DRB1或-DQB1不匹配的无血缘捐赠者那里移植的11872例患者的先导基因型。采用多变量回归方法,根据HLA基因座不匹配评估与患者先导基因型相关的风险因素;根据和患者先导基因型评估与HLA- A、-B、-C、-DRB1或-DQB1不匹配相关的风险。

患者先导基因型对急性GVHD和死亡率的影响因HLA基因座的不同而不同。与HLA-DQB1错配的TT型患者相比,HLA-DQB1错配的MM患者的非复发死亡率更高(风险比 1.35,p=0.01)。与HLA-DRB1错配的TT型患者相比,HLA-DRB1错配的MM型或MT型患者的III-IV级GVHD风险更高(优势比分别是2.52和1.51)。

患者对HLA-DQB1单位点错配的耐受性优于其他位点的错配。HLA-不匹配移植后的预后取决于HLA-B先导的二态性和HLA基因座不匹配。

综上所述,患者先导基因变异为HLA错配的限制提高了新的信息。或可根据患者先导基因来明智的选择不匹配的捐赠者来提高HLA不匹配的无血缘关系的移植的成功率。

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    2021-03-20 feather85
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    2020-06-09 mjldent
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    2020-06-09 marongnuan

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