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Donor KIR3DL1/receptor HLA-Bw4-80I Combination Reduces Acute Leukemia Relapse after Umbilical Cord Blood Transplantation without in Vitro T-cell Depletion.
Mediterranean Journal of Hematology and Infectious Diseases ( IF 3.2 ) Pub Date : 2021-01-01 , DOI: 10.4084/mjhid.2021.005
Xinchen Fang 1 , Xiaoyu Zhu 2 , Baolin Tang 2 , Kaidi Song 2 , Wen Yao 2 , Xiang Wan 2 , Huilan Liu 2 , Jun Peng 1 , Zimin Sun 2
Affiliation  

BACKGROUND Donor natural killer (NK) cell alloreactivity in umbilical cord bone marrow transplantation (UCBT) can lead to leukemic relapse. However, NK cell function is calibrated by interaction with human leukocyte antigens (HLAs). This study aimed to investigate graft-resistant leukemia after transplantation and compared specific genotypes of killer immunoglobulin-like receptors (KIRs) in donors and human leukocyte antigen ligands in patients. METHODS We retrospectively analyzed 232 patients with acute leukemia from a single center. Patients had undergone UCBT with myeloablative conditioning and without anti-thymocyte globulin. We identified the KIR genotypes of cord blood donors using polymerase chain reaction with sequence-specific primers. All of the donors contained KIR3DL1. RESULTS The patients were divided into three groups according to the HLA-B locus. The donor KIR3DL1 and recipient HLA-Bw4-80I combination was predictive of being highly educated and was associated with a lower relapse (P=0.006) and better overall survival (probability of relapse=0.13, P < 0.001) than the uneducated group. We found no significant increase in the incidence of acute or chronic graft-versus-host disease. CONCLUSIONS Our data suggest that the donor KIR3DL1/receptor and HLA-Bw4-80I combination in UCBT results in stronger graft-versus-leukemia effects and improved outcomes in patients with acute leukemia.

中文翻译:

供体 KIR3DL1/受体 HLA-Bw4-80I 组合可减少脐带血移植后急性白血病复发,而不会导致体外 T 细胞耗竭。

背景技术脐带骨髓移植 (UCBT) 中的供体自然杀伤 (NK) 细胞同种异体反应可导致白血病复发。然而,NK 细胞功能通过与人类白细胞抗原 (HLA) 的相互作用来校准。本研究旨在调查移植后的抗移植物白血病,并比较供体中杀伤性免疫球蛋白样受体 (KIR) 和患者中人类白细胞抗原配体的特定基因型。方法 我们回顾性分析了来自一个中心的 232 名急性白血病患者。患者接受了 UCBT 清髓性预处理和没有抗胸腺细胞球蛋白。我们使用聚合酶链式反应和序列特异性引物鉴定了脐带血捐献者的 KIR 基因型。所有的供体都含有 KIR3DL1。结果根据HLA-B位点将患者分为三组。供体 KIR3DL1 和受体 HLA-Bw4-80I 组合可预测受过高等教育,并且与未受过教育的组相比,复发率较低 (P=0.006) 和总生存期更好(复发概率=0.13,P < 0.001)。我们发现急性或慢性移植物抗宿主病的发病率没有显着增加。结论 我们的数据表明,UCBT 中的供体 KIR3DL1/受体和 HLA-Bw4-80I 组合可增强急性白血病患者的移植物抗白血病作用并改善预后。001) 比未受过教育的组。我们发现急性或慢性移植物抗宿主病的发病率没有显着增加。结论 我们的数据表明,UCBT 中的供体 KIR3DL1/受体和 HLA-Bw4-80I 组合可增强急性白血病患者的移植物抗白血病作用并改善预后。001) 比未受过教育的组。我们发现急性或慢性移植物抗宿主病的发病率没有显着增加。结论 我们的数据表明,UCBT 中的供体 KIR3DL1/受体和 HLA-Bw4-80I 组合可增强急性白血病患者的移植物抗白血病作用并改善预后。
更新日期:2021-01-01
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