Blood:KIR2DS1/KIR3DL1基因型能否指导选择造血细胞抑制的更佳非亲缘供体?

2020-01-14 QQY MedSci原创

几项研究表明,利用杀伤细胞免疫球蛋白样受体介导的自然杀伤(NK)细胞反应活性可以降低异基因造血细胞移植(HCT)后的复发风险。基于一个有希望的模型,KIR2DS1和KIR3DL1及其同源配体的信息可被用来将供体分为KIR-优势或KIR-劣势。本研究拟从外部在非亲缘供体HCT中验证该模型。采用Cox回归模型检测预测指标对总体存活率(OS)和复发概率的影响,并根据患者年龄、校正的疾病风险指数、表现状态

几项研究表明,利用杀伤细胞免疫球蛋白样受体介导的自然杀伤(NK)细胞反应活性可以降低异基因造血细胞移植(HCT)后的复发风险。基于一个有希望的模型,KIR2DS1和KIR3DL1及其同源配体的信息可被用来将供体分为KIR-优势或KIR-劣势。本研究拟从外部在非亲缘供体HCT中验证该模型。

采用Cox回归模型检测预测指标对总体存活率(OS)和复发概率的影响,并根据患者年龄、校正的疾病风险指数、表现状态、供体年龄、HLA-匹配、性别-匹配、CMV-匹配、调节化疗强度、T细胞耗竭的类型和移植物类型进行校正。

本分析共纳入了2222位AML或MDS患者的数据。采用靶向二代测序鉴定KIR基因基因型。在多变量分析和亚组分析中,KIR-优势供体对应患者的OS和累计复发概率与KIR-劣势供体对应患者的相当。OS和复发概率的校正风险比分别是0.99和1.04。研究人员还分别检测了激活供体KIR2DS1和抑制KIR3DL1的影响,但对OS和复发风险均无明显影响。

因此,本研究显示该模型不能普遍预测NK介导的疾病控制。对NK介导的同种异体反应的深入了解对于预测其对移植物抗白血病反应的影响以及最终利用KIR-基因型信息进行供体选择是极其必要的。

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    2020-11-02 feather85
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    2020-01-16 俅侠
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